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 <[email protected]>
   7  *                     Denis Joseph Barrow <[email protected]>
   8  *                     Jan Dumon <[email protected]>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <[email protected]>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <[email protected]>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define MOD_AUTHOR                      "Option Wireless"
  77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  78 #define MOD_LICENSE                     "GPL"
  79
  80 #define HSO_MAX_NET_DEVICES             10
  81 #define HSO__MAX_MTU                    2048
  82 #define DEFAULT_MTU                     1500
  83 #define DEFAULT_MRU                     1500
  84
  85 #define CTRL_URB_RX_SIZE                1024
  86 #define CTRL_URB_TX_SIZE                64
  87
  88 #define BULK_URB_RX_SIZE                4096
  89 #define BULK_URB_TX_SIZE                8192
  90
  91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_RX_BUF_COUNT           4
  94 #define USB_TYPE_OPTION_VENDOR          0x20
  95
  96 /* These definitions are used with the struct hso_net flags element */
  97 /* - use *_bit operations on it. (bit indices not values.) */
  98 #define HSO_NET_RUNNING                 0
  99
 100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 101
 102 #define HSO_SERIAL_MAGIC                0x48534f31
 103
 104 /* Number of ttys to handle */
 105 #define HSO_SERIAL_TTY_MINORS           256
 106
 107 #define MAX_RX_URBS                     2
 108
 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 110 {
 111         if (tty)
 112                 return tty->driver_data;
 113         return NULL;
 114 }
 115
 116 /*****************************************************************************/
 117 /* Debugging functions                                                       */
 118 /*****************************************************************************/
 119 #define D__(lvl_, fmt, arg...)                          \
 120         do {                                            \
 121                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 122                        __LINE__, __func__, ## arg);     \
 123         } while (0)
 124
 125 #define D_(lvl, args...)                                \
 126         do {                                            \
 127                 if (lvl & debug)                        \
 128                         D__(KERN_INFO, args);           \
 129         } while (0)
 130
 131 #define D1(args...)     D_(0x01, ##args)
 132 #define D2(args...)     D_(0x02, ##args)
 133 #define D3(args...)     D_(0x04, ##args)
 134 #define D4(args...)     D_(0x08, ##args)
 135 #define D5(args...)     D_(0x10, ##args)
 136
 137 /*****************************************************************************/
 138 /* Enumerators                                                               */
 139 /*****************************************************************************/
 140 enum pkt_parse_state {
 141         WAIT_IP,
 142         WAIT_DATA,
 143         WAIT_SYNC
 144 };
 145
 146 /*****************************************************************************/
 147 /* Structs                                                                   */
 148 /*****************************************************************************/
 149
 150 struct hso_shared_int {
 151         struct usb_endpoint_descriptor *intr_endp;
 152         void *shared_intr_buf;
 153         struct urb *shared_intr_urb;
 154         struct usb_device *usb;
 155         int use_count;
 156         int ref_count;
 157         struct mutex shared_int_lock;
 158 };
 159
 160 struct hso_net {
 161         struct hso_device *parent;
 162         struct net_device *net;
 163         struct rfkill *rfkill;
 164
 165         struct usb_endpoint_descriptor *in_endp;
 166         struct usb_endpoint_descriptor *out_endp;
 167
 168         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 169         struct urb *mux_bulk_tx_urb;
 170         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 171         void *mux_bulk_tx_buf;
 172
 173         struct sk_buff *skb_rx_buf;
 174         struct sk_buff *skb_tx_buf;
 175
 176         enum pkt_parse_state rx_parse_state;
 177         spinlock_t net_lock;
 178
 179         unsigned short rx_buf_size;
 180         unsigned short rx_buf_missing;
 181         struct iphdr rx_ip_hdr;
 182
 183         unsigned long flags;
 184 };
 185
 186 enum rx_ctrl_state{
 187         RX_IDLE,
 188         RX_SENT,
 189         RX_PENDING
 190 };
 191
 192 #define BM_REQUEST_TYPE (0xa1)
 193 #define B_NOTIFICATION  (0x20)
 194 #define W_VALUE         (0x0)
 195 #define W_INDEX         (0x2)
 196 #define W_LENGTH        (0x2)
 197
 198 #define B_OVERRUN       (0x1<<6)
 199 #define B_PARITY        (0x1<<5)
 200 #define B_FRAMING       (0x1<<4)
 201 #define B_RING_SIGNAL   (0x1<<3)
 202 #define B_BREAK         (0x1<<2)
 203 #define B_TX_CARRIER    (0x1<<1)
 204 #define B_RX_CARRIER    (0x1<<0)
 205
 206 struct hso_serial_state_notification {
 207         u8 bmRequestType;
 208         u8 bNotification;
 209         u16 wValue;
 210         u16 wIndex;
 211         u16 wLength;
 212         u16 UART_state_bitmap;
 213 } __packed;
 214
 215 struct hso_tiocmget {
 216         struct mutex mutex;
 217         wait_queue_head_t waitq;
 218         int    intr_completed;
 219         struct usb_endpoint_descriptor *endp;
 220         struct urb *urb;
 221         struct hso_serial_state_notification serial_state_notification;
 222         u16    prev_UART_state_bitmap;
 223         struct uart_icount icount;
 224 };
 225
 226
 227 struct hso_serial {
 228         struct hso_device *parent;
 229         int magic;
 230         u8 minor;
 231
 232         struct hso_shared_int *shared_int;
 233
 234         /* rx/tx urb could be either a bulk urb or a control urb depending
 235            on which serial port it is used on. */
 236         struct urb *rx_urb[MAX_RX_URBS];
 237         u8 num_rx_urbs;
 238         u8 *rx_data[MAX_RX_URBS];
 239         u16 rx_data_length;     /* should contain allocated length */
 240
 241         struct urb *tx_urb;
 242         u8 *tx_data;
 243         u8 *tx_buffer;
 244         u16 tx_data_length;     /* should contain allocated length */
 245         u16 tx_data_count;
 246         u16 tx_buffer_count;
 247         struct usb_ctrlrequest ctrl_req_tx;
 248         struct usb_ctrlrequest ctrl_req_rx;
 249
 250         struct usb_endpoint_descriptor *in_endp;
 251         struct usb_endpoint_descriptor *out_endp;
 252
 253         enum rx_ctrl_state rx_state;
 254         u8 rts_state;
 255         u8 dtr_state;
 256         unsigned tx_urb_used:1;
 257
 258         /* from usb_serial_port */
 259         struct tty_struct *tty;
 260         int open_count;
 261         spinlock_t serial_lock;
 262
 263         int (*write_data) (struct hso_serial *serial);
 264         struct hso_tiocmget  *tiocmget;
 265         /* Hacks required to get flow control
 266          * working on the serial receive buffers
 267          * so as not to drop characters on the floor.
 268          */
 269         int  curr_rx_urb_idx;
 270         u16  curr_rx_urb_offset;
 271         u8   rx_urb_filled[MAX_RX_URBS];
 272         struct tasklet_struct unthrottle_tasklet;
 273         struct work_struct    retry_unthrottle_workqueue;
 274 };
 275
 276 struct hso_device {
 277         union {
 278                 struct hso_serial *dev_serial;
 279                 struct hso_net *dev_net;
 280         } port_data;
 281
 282         u32 port_spec;
 283
 284         u8 is_active;
 285         u8 usb_gone;
 286         struct work_struct async_get_intf;
 287         struct work_struct async_put_intf;
 288         struct work_struct reset_device;
 289
 290         struct usb_device *usb;
 291         struct usb_interface *interface;
 292
 293         struct device *dev;
 294         struct kref ref;
 295         struct mutex mutex;
 296 };
 297
 298 /* Type of interface */
 299 #define HSO_INTF_MASK           0xFF00
 300 #define HSO_INTF_MUX            0x0100
 301 #define HSO_INTF_BULK           0x0200
 302
 303 /* Type of port */
 304 #define HSO_PORT_MASK           0xFF
 305 #define HSO_PORT_NO_PORT        0x0
 306 #define HSO_PORT_CONTROL        0x1
 307 #define HSO_PORT_APP            0x2
 308 #define HSO_PORT_GPS            0x3
 309 #define HSO_PORT_PCSC           0x4
 310 #define HSO_PORT_APP2           0x5
 311 #define HSO_PORT_GPS_CONTROL    0x6
 312 #define HSO_PORT_MSD            0x7
 313 #define HSO_PORT_VOICE          0x8
 314 #define HSO_PORT_DIAG2          0x9
 315 #define HSO_PORT_DIAG           0x10
 316 #define HSO_PORT_MODEM          0x11
 317 #define HSO_PORT_NETWORK        0x12
 318
 319 /* Additional device info */
 320 #define HSO_INFO_MASK           0xFF000000
 321 #define HSO_INFO_CRC_BUG        0x01000000
 322
 323 /*****************************************************************************/
 324 /* Prototypes                                                                */
 325 /*****************************************************************************/
 326 /* Serial driver functions */
 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 328                                unsigned int set, unsigned int clear);
 329 static void ctrl_callback(struct urb *urb);
 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 331 static void hso_kick_transmit(struct hso_serial *serial);
 332 /* Helper functions */
 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 334                                    struct usb_device *usb, gfp_t gfp);
 335 static void handle_usb_error(int status, const char *function,
 336                              struct hso_device *hso_dev);
 337 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 338                                                   int type, int dir);
 339 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 340 static void hso_free_interface(struct usb_interface *intf);
 341 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 342 static int hso_stop_serial_device(struct hso_device *hso_dev);
 343 static int hso_start_net_device(struct hso_device *hso_dev);
 344 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 345 static int hso_stop_net_device(struct hso_device *hso_dev);
 346 static void hso_serial_ref_free(struct kref *ref);
 347 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 348 static int hso_mux_serial_read(struct hso_serial *serial);
 349 static void async_get_intf(struct work_struct *data);
 350 static void async_put_intf(struct work_struct *data);
 351 static int hso_put_activity(struct hso_device *hso_dev);
 352 static int hso_get_activity(struct hso_device *hso_dev);
 353 static void tiocmget_intr_callback(struct urb *urb);
 354 static void reset_device(struct work_struct *data);
 355 /*****************************************************************************/
 356 /* Helping functions                                                         */
 357 /*****************************************************************************/
 358
 359 /* #define DEBUG */
 360
 361 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 362 {
 363         return hso_dev->port_data.dev_net;
 364 }
 365
 366 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 367 {
 368         return hso_dev->port_data.dev_serial;
 369 }
 370
 371 /* Debugging functions */
 372 #ifdef DEBUG
 373 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 374                      unsigned int len)
 375 {
 376         static char name[255];
 377
 378         sprintf(name, "hso[%d:%s]", line_count, func_name);
 379         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 380 }
 381
 382 #define DUMP(buf_, len_)        \
 383         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 384
 385 #define DUMP1(buf_, len_)                       \
 386         do {                                    \
 387                 if (0x01 & debug)               \
 388                         DUMP(buf_, len_);       \
 389         } while (0)
 390 #else
 391 #define DUMP(buf_, len_)
 392 #define DUMP1(buf_, len_)
 393 #endif
 394
 395 /* module parameters */
 396 static int debug;
 397 static int tty_major;
 398 static int disable_net;
 399
 400 /* driver info */
 401 static const char driver_name[] = "hso";
 402 static const char tty_filename[] = "ttyHS";
 403 static const char *version = __FILE__ ": " MOD_AUTHOR;
 404 /* the usb driver itself (registered in hso_init) */
 405 static struct usb_driver hso_driver;
 406 /* serial structures */
 407 static struct tty_driver *tty_drv;
 408 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 409 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 410 static spinlock_t serial_table_lock;
 411
 412 static const s32 default_port_spec[] = {
 413         HSO_INTF_MUX | HSO_PORT_NETWORK,
 414         HSO_INTF_BULK | HSO_PORT_DIAG,
 415         HSO_INTF_BULK | HSO_PORT_MODEM,
 416         0
 417 };
 418
 419 static const s32 icon321_port_spec[] = {
 420         HSO_INTF_MUX | HSO_PORT_NETWORK,
 421         HSO_INTF_BULK | HSO_PORT_DIAG2,
 422         HSO_INTF_BULK | HSO_PORT_MODEM,
 423         HSO_INTF_BULK | HSO_PORT_DIAG,
 424         0
 425 };
 426
 427 #define default_port_device(vendor, product)    \
 428         USB_DEVICE(vendor, product),    \
 429                 .driver_info = (kernel_ulong_t)default_port_spec
 430
 431 #define icon321_port_device(vendor, product)    \
 432         USB_DEVICE(vendor, product),    \
 433                 .driver_info = (kernel_ulong_t)icon321_port_spec
 434
 435 /* list of devices we support */
 436 static const struct usb_device_id hso_ids[] = {
 437         {default_port_device(0x0af0, 0x6711)},
 438         {default_port_device(0x0af0, 0x6731)},
 439         {default_port_device(0x0af0, 0x6751)},
 440         {default_port_device(0x0af0, 0x6771)},
 441         {default_port_device(0x0af0, 0x6791)},
 442         {default_port_device(0x0af0, 0x6811)},
 443         {default_port_device(0x0af0, 0x6911)},
 444         {default_port_device(0x0af0, 0x6951)},
 445         {default_port_device(0x0af0, 0x6971)},
 446         {default_port_device(0x0af0, 0x7011)},
 447         {default_port_device(0x0af0, 0x7031)},
 448         {default_port_device(0x0af0, 0x7051)},
 449         {default_port_device(0x0af0, 0x7071)},
 450         {default_port_device(0x0af0, 0x7111)},
 451         {default_port_device(0x0af0, 0x7211)},
 452         {default_port_device(0x0af0, 0x7251)},
 453         {default_port_device(0x0af0, 0x7271)},
 454         {default_port_device(0x0af0, 0x7311)},
 455         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 456         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 457         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 458         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 459         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 460         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 463         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 464         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 465         {USB_DEVICE(0x0af0, 0x7701)},
 466         {USB_DEVICE(0x0af0, 0x7706)},
 467         {USB_DEVICE(0x0af0, 0x7801)},
 468         {USB_DEVICE(0x0af0, 0x7901)},
 469         {USB_DEVICE(0x0af0, 0x7A01)},
 470         {USB_DEVICE(0x0af0, 0x7A05)},
 471         {USB_DEVICE(0x0af0, 0x8200)},
 472         {USB_DEVICE(0x0af0, 0x8201)},
 473         {USB_DEVICE(0x0af0, 0x8300)},
 474         {USB_DEVICE(0x0af0, 0x8302)},
 475         {USB_DEVICE(0x0af0, 0x8304)},
 476         {USB_DEVICE(0x0af0, 0x8400)},
 477         {USB_DEVICE(0x0af0, 0x8600)},
 478         {USB_DEVICE(0x0af0, 0x8800)},
 479         {USB_DEVICE(0x0af0, 0x8900)},
 480         {USB_DEVICE(0x0af0, 0x9000)},
 481         {USB_DEVICE(0x0af0, 0xd035)},
 482         {USB_DEVICE(0x0af0, 0xd055)},
 483         {USB_DEVICE(0x0af0, 0xd155)},
 484         {USB_DEVICE(0x0af0, 0xd255)},
 485         {USB_DEVICE(0x0af0, 0xd057)},
 486         {USB_DEVICE(0x0af0, 0xd157)},
 487         {USB_DEVICE(0x0af0, 0xd257)},
 488         {USB_DEVICE(0x0af0, 0xd357)},
 489         {USB_DEVICE(0x0af0, 0xd058)},
 490         {USB_DEVICE(0x0af0, 0xc100)},
 491         {}
 492 };
 493 MODULE_DEVICE_TABLE(usb, hso_ids);
 494
 495 /* Sysfs attribute */
 496 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 497                                        struct device_attribute *attr,
 498                                        char *buf)
 499 {
 500         struct hso_device *hso_dev = dev_get_drvdata(dev);
 501         char *port_name;
 502
 503         if (!hso_dev)
 504                 return 0;
 505
 506         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 507         case HSO_PORT_CONTROL:
 508                 port_name = "Control";
 509                 break;
 510         case HSO_PORT_APP:
 511                 port_name = "Application";
 512                 break;
 513         case HSO_PORT_APP2:
 514                 port_name = "Application2";
 515                 break;
 516         case HSO_PORT_GPS:
 517                 port_name = "GPS";
 518                 break;
 519         case HSO_PORT_GPS_CONTROL:
 520                 port_name = "GPS Control";
 521                 break;
 522         case HSO_PORT_PCSC:
 523                 port_name = "PCSC";
 524                 break;
 525         case HSO_PORT_DIAG:
 526                 port_name = "Diagnostic";
 527                 break;
 528         case HSO_PORT_DIAG2:
 529                 port_name = "Diagnostic2";
 530                 break;
 531         case HSO_PORT_MODEM:
 532                 port_name = "Modem";
 533                 break;
 534         case HSO_PORT_NETWORK:
 535                 port_name = "Network";
 536                 break;
 537         default:
 538                 port_name = "Unknown";
 539                 break;
 540         }
 541
 542         return sprintf(buf, "%s\n", port_name);
 543 }
 544 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 545
 546 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 547 {
 548         int idx;
 549
 550         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 551                 if (serial->rx_urb[idx] == urb)
 552                         return idx;
 553         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 554         return -1;
 555 }
 556
 557 /* converts mux value to a port spec value */
 558 static u32 hso_mux_to_port(int mux)
 559 {
 560         u32 result;
 561
 562         switch (mux) {
 563         case 0x1:
 564                 result = HSO_PORT_CONTROL;
 565                 break;
 566         case 0x2:
 567                 result = HSO_PORT_APP;
 568                 break;
 569         case 0x4:
 570                 result = HSO_PORT_PCSC;
 571                 break;
 572         case 0x8:
 573                 result = HSO_PORT_GPS;
 574                 break;
 575         case 0x10:
 576                 result = HSO_PORT_APP2;
 577                 break;
 578         default:
 579                 result = HSO_PORT_NO_PORT;
 580         }
 581         return result;
 582 }
 583
 584 /* converts port spec value to a mux value */
 585 static u32 hso_port_to_mux(int port)
 586 {
 587         u32 result;
 588
 589         switch (port & HSO_PORT_MASK) {
 590         case HSO_PORT_CONTROL:
 591                 result = 0x0;
 592                 break;
 593         case HSO_PORT_APP:
 594                 result = 0x1;
 595                 break;
 596         case HSO_PORT_PCSC:
 597                 result = 0x2;
 598                 break;
 599         case HSO_PORT_GPS:
 600                 result = 0x3;
 601                 break;
 602         case HSO_PORT_APP2:
 603                 result = 0x4;
 604                 break;
 605         default:
 606                 result = 0x0;
 607         }
 608         return result;
 609 }
 610
 611 static struct hso_serial *get_serial_by_shared_int_and_type(
 612                                         struct hso_shared_int *shared_int,
 613                                         int mux)
 614 {
 615         int i, port;
 616
 617         port = hso_mux_to_port(mux);
 618
 619         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 620                 if (serial_table[i] &&
 621                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 622                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 623                         return dev2ser(serial_table[i]);
 624                 }
 625         }
 626
 627         return NULL;
 628 }
 629
 630 static struct hso_serial *get_serial_by_index(unsigned index)
 631 {
 632         struct hso_serial *serial = NULL;
 633         unsigned long flags;
 634
 635         spin_lock_irqsave(&serial_table_lock, flags);
 636         if (serial_table[index])
 637                 serial = dev2ser(serial_table[index]);
 638         spin_unlock_irqrestore(&serial_table_lock, flags);
 639
 640         return serial;
 641 }
 642
 643 static int get_free_serial_index(void)
 644 {
 645         int index;
 646         unsigned long flags;
 647
 648         spin_lock_irqsave(&serial_table_lock, flags);
 649         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 650                 if (serial_table[index] == NULL) {
 651                         spin_unlock_irqrestore(&serial_table_lock, flags);
 652                         return index;
 653                 }
 654         }
 655         spin_unlock_irqrestore(&serial_table_lock, flags);
 656
 657         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 658         return -1;
 659 }
 660
 661 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 662 {
 663         unsigned long flags;
 664
 665         spin_lock_irqsave(&serial_table_lock, flags);
 666         if (serial)
 667                 serial_table[index] = serial->parent;
 668         else
 669                 serial_table[index] = NULL;
 670         spin_unlock_irqrestore(&serial_table_lock, flags);
 671 }
 672
 673 static void handle_usb_error(int status, const char *function,
 674                              struct hso_device *hso_dev)
 675 {
 676         char *explanation;
 677
 678         switch (status) {
 679         case -ENODEV:
 680                 explanation = "no device";
 681                 break;
 682         case -ENOENT:
 683                 explanation = "endpoint not enabled";
 684                 break;
 685         case -EPIPE:
 686                 explanation = "endpoint stalled";
 687                 break;
 688         case -ENOSPC:
 689                 explanation = "not enough bandwidth";
 690                 break;
 691         case -ESHUTDOWN:
 692                 explanation = "device disabled";
 693                 break;
 694         case -EHOSTUNREACH:
 695                 explanation = "device suspended";
 696                 break;
 697         case -EINVAL:
 698         case -EAGAIN:
 699         case -EFBIG:
 700         case -EMSGSIZE:
 701                 explanation = "internal error";
 702                 break;
 703         case -EILSEQ:
 704         case -EPROTO:
 705         case -ETIME:
 706         case -ETIMEDOUT:
 707                 explanation = "protocol error";
 708                 if (hso_dev)
 709                         schedule_work(&hso_dev->reset_device);
 710                 break;
 711         default:
 712                 explanation = "unknown status";
 713                 break;
 714         }
 715
 716         /* log a meaningful explanation of an USB status */
 717         D1("%s: received USB status - %s (%d)", function, explanation, status);
 718 }
 719
 720 /* Network interface functions */
 721
 722 /* called when net interface is brought up by ifconfig */
 723 static int hso_net_open(struct net_device *net)
 724 {
 725         struct hso_net *odev = netdev_priv(net);
 726         unsigned long flags = 0;
 727
 728         if (!odev) {
 729                 dev_err(&net->dev, "No net device !\n");
 730                 return -ENODEV;
 731         }
 732
 733         odev->skb_tx_buf = NULL;
 734
 735         /* setup environment */
 736         spin_lock_irqsave(&odev->net_lock, flags);
 737         odev->rx_parse_state = WAIT_IP;
 738         odev->rx_buf_size = 0;
 739         odev->rx_buf_missing = sizeof(struct iphdr);
 740         spin_unlock_irqrestore(&odev->net_lock, flags);
 741
 742         /* We are up and running. */
 743         set_bit(HSO_NET_RUNNING, &odev->flags);
 744         hso_start_net_device(odev->parent);
 745
 746         /* Tell the kernel we are ready to start receiving from it */
 747         netif_start_queue(net);
 748
 749         return 0;
 750 }
 751
 752 /* called when interface is brought down by ifconfig */
 753 static int hso_net_close(struct net_device *net)
 754 {
 755         struct hso_net *odev = netdev_priv(net);
 756
 757         /* we don't need the queue anymore */
 758         netif_stop_queue(net);
 759         /* no longer running */
 760         clear_bit(HSO_NET_RUNNING, &odev->flags);
 761
 762         hso_stop_net_device(odev->parent);
 763
 764         /* done */
 765         return 0;
 766 }
 767
 768 /* USB tells is xmit done, we should start the netqueue again */
 769 static void write_bulk_callback(struct urb *urb)
 770 {
 771         struct hso_net *odev = urb->context;
 772         int status = urb->status;
 773
 774         /* Sanity check */
 775         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 776                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 777                 return;
 778         }
 779
 780         /* Do we still have a valid kernel network device? */
 781         if (!netif_device_present(odev->net)) {
 782                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 783                         __func__);
 784                 return;
 785         }
 786
 787         /* log status, but don't act on it, we don't need to resubmit anything
 788          * anyhow */
 789         if (status)
 790                 handle_usb_error(status, __func__, odev->parent);
 791
 792         hso_put_activity(odev->parent);
 793
 794         /* Tell the network interface we are ready for another frame */
 795         netif_wake_queue(odev->net);
 796 }
 797
 798 /* called by kernel when we need to transmit a packet */
 799 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 800                                             struct net_device *net)
 801 {
 802         struct hso_net *odev = netdev_priv(net);
 803         int result;
 804
 805         /* Tell the kernel, "No more frames 'til we are done with this one." */
 806         netif_stop_queue(net);
 807         if (hso_get_activity(odev->parent) == -EAGAIN) {
 808                 odev->skb_tx_buf = skb;
 809                 return NETDEV_TX_OK;
 810         }
 811
 812         /* log if asked */
 813         DUMP1(skb->data, skb->len);
 814         /* Copy it from kernel memory to OUR memory */
 815         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 816         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 817
 818         /* Fill in the URB for shipping it out. */
 819         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 820                           odev->parent->usb,
 821                           usb_sndbulkpipe(odev->parent->usb,
 822                                           odev->out_endp->
 823                                           bEndpointAddress & 0x7F),
 824                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 825                           odev);
 826
 827         /* Deal with the Zero Length packet problem, I hope */
 828         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 829
 830         /* Send the URB on its merry way. */
 831         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 832         if (result) {
 833                 dev_warn(&odev->parent->interface->dev,
 834                         "failed mux_bulk_tx_urb %d\n", result);
 835                 net->stats.tx_errors++;
 836                 netif_start_queue(net);
 837         } else {
 838                 net->stats.tx_packets++;
 839                 net->stats.tx_bytes += skb->len;
 840         }
 841         dev_kfree_skb(skb);
 842         /* we're done */
 843         return NETDEV_TX_OK;
 844 }
 845
 846 static const struct ethtool_ops ops = {
 847         .get_link = ethtool_op_get_link
 848 };
 849
 850 /* called when a packet did not ack after watchdogtimeout */
 851 static void hso_net_tx_timeout(struct net_device *net)
 852 {
 853         struct hso_net *odev = netdev_priv(net);
 854
 855         if (!odev)
 856                 return;
 857
 858         /* Tell syslog we are hosed. */
 859         dev_warn(&net->dev, "Tx timed out.\n");
 860
 861         /* Tear the waiting frame off the list */
 862         if (odev->mux_bulk_tx_urb &&
 863             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 864                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 865
 866         /* Update statistics */
 867         net->stats.tx_errors++;
 868 }
 869
 870 /* make a real packet from the received USB buffer */
 871 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 872                         unsigned int count, unsigned char is_eop)
 873 {
 874         unsigned short temp_bytes;
 875         unsigned short buffer_offset = 0;
 876         unsigned short frame_len;
 877         unsigned char *tmp_rx_buf;
 878
 879         /* log if needed */
 880         D1("Rx %d bytes", count);
 881         DUMP(ip_pkt, min(128, (int)count));
 882
 883         while (count) {
 884                 switch (odev->rx_parse_state) {
 885                 case WAIT_IP:
 886                         /* waiting for IP header. */
 887                         /* wanted bytes - size of ip header */
 888                         temp_bytes =
 889                             (count <
 890                              odev->rx_buf_missing) ? count : odev->
 891                             rx_buf_missing;
 892
 893                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 894                                odev->rx_buf_size, ip_pkt + buffer_offset,
 895                                temp_bytes);
 896
 897                         odev->rx_buf_size += temp_bytes;
 898                         buffer_offset += temp_bytes;
 899                         odev->rx_buf_missing -= temp_bytes;
 900                         count -= temp_bytes;
 901
 902                         if (!odev->rx_buf_missing) {
 903                                 /* header is complete allocate an sk_buffer and
 904                                  * continue to WAIT_DATA */
 905                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 906
 907                                 if ((frame_len > DEFAULT_MRU) ||
 908                                     (frame_len < sizeof(struct iphdr))) {
 909                                         dev_err(&odev->net->dev,
 910                                                 "Invalid frame (%d) length\n",
 911                                                 frame_len);
 912                                         odev->rx_parse_state = WAIT_SYNC;
 913                                         continue;
 914                                 }
 915                                 /* Allocate an sk_buff */
 916                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 917                                                                     frame_len);
 918                                 if (!odev->skb_rx_buf) {
 919                                         /* We got no receive buffer. */
 920                                         D1("could not allocate memory");
 921                                         odev->rx_parse_state = WAIT_SYNC;
 922                                         return;
 923                                 }
 924
 925                                 /* Copy what we got so far. make room for iphdr
 926                                  * after tail. */
 927                                 tmp_rx_buf =
 928                                     skb_put(odev->skb_rx_buf,
 929                                             sizeof(struct iphdr));
 930                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 931                                        sizeof(struct iphdr));
 932
 933                                 /* ETH_HLEN */
 934                                 odev->rx_buf_size = sizeof(struct iphdr);
 935
 936                                 /* Filip actually use .tot_len */
 937                                 odev->rx_buf_missing =
 938                                     frame_len - sizeof(struct iphdr);
 939                                 odev->rx_parse_state = WAIT_DATA;
 940                         }
 941                         break;
 942
 943                 case WAIT_DATA:
 944                         temp_bytes = (count < odev->rx_buf_missing)
 945                                         ? count : odev->rx_buf_missing;
 946
 947                         /* Copy the rest of the bytes that are left in the
 948                          * buffer into the waiting sk_buf. */
 949                         /* Make room for temp_bytes after tail. */
 950                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 951                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 952
 953                         odev->rx_buf_missing -= temp_bytes;
 954                         count -= temp_bytes;
 955                         buffer_offset += temp_bytes;
 956                         odev->rx_buf_size += temp_bytes;
 957                         if (!odev->rx_buf_missing) {
 958                                 /* Packet is complete. Inject into stack. */
 959                                 /* We have IP packet here */
 960                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 961                                 skb_reset_mac_header(odev->skb_rx_buf);
 962
 963                                 /* Ship it off to the kernel */
 964                                 netif_rx(odev->skb_rx_buf);
 965                                 /* No longer our buffer. */
 966                                 odev->skb_rx_buf = NULL;
 967
 968                                 /* update out statistics */
 969                                 odev->net->stats.rx_packets++;
 970
 971                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 972
 973                                 odev->rx_buf_size = 0;
 974                                 odev->rx_buf_missing = sizeof(struct iphdr);
 975                                 odev->rx_parse_state = WAIT_IP;
 976                         }
 977                         break;
 978
 979                 case WAIT_SYNC:
 980                         D1(" W_S");
 981                         count = 0;
 982                         break;
 983                 default:
 984                         D1(" ");
 985                         count--;
 986                         break;
 987                 }
 988         }
 989
 990         /* Recovery mechanism for WAIT_SYNC state. */
 991         if (is_eop) {
 992                 if (odev->rx_parse_state == WAIT_SYNC) {
 993                         odev->rx_parse_state = WAIT_IP;
 994                         odev->rx_buf_size = 0;
 995                         odev->rx_buf_missing = sizeof(struct iphdr);
 996                 }
 997         }
 998 }
 999
1000 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
1001 {
1002         static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1003         u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
1004
1005         if (((rest == 5) || (rest == 6)) &&
1006             !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
1007                     crc_check, 4)) {
1008                 urb->actual_length -= 4;
1009         }
1010 }
1011
1012 /* Moving data from usb to kernel (in interrupt state) */
1013 static void read_bulk_callback(struct urb *urb)
1014 {
1015         struct hso_net *odev = urb->context;
1016         struct net_device *net;
1017         int result;
1018         int status = urb->status;
1019
1020         /* is al ok?  (Filip: Who's Al ?) */
1021         if (status) {
1022                 handle_usb_error(status, __func__, odev->parent);
1023                 return;
1024         }
1025
1026         /* Sanity check */
1027         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1028                 D1("BULK IN callback but driver is not active!");
1029                 return;
1030         }
1031         usb_mark_last_busy(urb->dev);
1032
1033         net = odev->net;
1034
1035         if (!netif_device_present(net)) {
1036                 /* Somebody killed our network interface... */
1037                 return;
1038         }
1039
1040         if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1041                 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1042
1043         /* do we even have a packet? */
1044         if (urb->actual_length) {
1045                 /* Handle the IP stream, add header and push it onto network
1046                  * stack if the packet is complete. */
1047                 spin_lock(&odev->net_lock);
1048                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1049                             (urb->transfer_buffer_length >
1050                              urb->actual_length) ? 1 : 0);
1051                 spin_unlock(&odev->net_lock);
1052         }
1053
1054         /* We are done with this URB, resubmit it. Prep the USB to wait for
1055          * another frame. Reuse same as received. */
1056         usb_fill_bulk_urb(urb,
1057                           odev->parent->usb,
1058                           usb_rcvbulkpipe(odev->parent->usb,
1059                                           odev->in_endp->
1060                                           bEndpointAddress & 0x7F),
1061                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1062                           read_bulk_callback, odev);
1063
1064         /* Give this to the USB subsystem so it can tell us when more data
1065          * arrives. */
1066         result = usb_submit_urb(urb, GFP_ATOMIC);
1067         if (result)
1068                 dev_warn(&odev->parent->interface->dev,
1069                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1070                          result);
1071 }
1072
1073 /* Serial driver functions */
1074
1075 static void hso_init_termios(struct ktermios *termios)
1076 {
1077         /*
1078          * The default requirements for this device are:
1079          */
1080         termios->c_iflag &=
1081                 ~(IGNBRK        /* disable ignore break */
1082                 | BRKINT        /* disable break causes interrupt */
1083                 | PARMRK        /* disable mark parity errors */
1084                 | ISTRIP        /* disable clear high bit of input characters */
1085                 | INLCR         /* disable translate NL to CR */
1086                 | IGNCR         /* disable ignore CR */
1087                 | ICRNL         /* disable translate CR to NL */
1088                 | IXON);        /* disable enable XON/XOFF flow control */
1089
1090         /* disable postprocess output characters */
1091         termios->c_oflag &= ~OPOST;
1092
1093         termios->c_lflag &=
1094                 ~(ECHO          /* disable echo input characters */
1095                 | ECHONL        /* disable echo new line */
1096                 | ICANON        /* disable erase, kill, werase, and rprnt
1097                                    special characters */
1098                 | ISIG          /* disable interrupt, quit, and suspend special
1099                                    characters */
1100                 | IEXTEN);      /* disable non-POSIX special characters */
1101
1102         termios->c_cflag &=
1103                 ~(CSIZE         /* no size */
1104                 | PARENB        /* disable parity bit */
1105                 | CBAUD         /* clear current baud rate */
1106                 | CBAUDEX);     /* clear current buad rate */
1107
1108         termios->c_cflag |= CS8;        /* character size 8 bits */
1109
1110         /* baud rate 115200 */
1111         tty_termios_encode_baud_rate(termios, 115200, 115200);
1112 }
1113
1114 static void _hso_serial_set_termios(struct tty_struct *tty,
1115                                     struct ktermios *old)
1116 {
1117         struct hso_serial *serial = get_serial_by_tty(tty);
1118         struct ktermios *termios;
1119
1120         if (!serial) {
1121                 printk(KERN_ERR "%s: no tty structures", __func__);
1122                 return;
1123         }
1124
1125         D4("port %d", serial->minor);
1126
1127         /*
1128          *      Fix up unsupported bits
1129          */
1130         termios = tty->termios;
1131         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1132
1133         termios->c_cflag &=
1134                 ~(CSIZE         /* no size */
1135                 | PARENB        /* disable parity bit */
1136                 | CBAUD         /* clear current baud rate */
1137                 | CBAUDEX);     /* clear current buad rate */
1138
1139         termios->c_cflag |= CS8;        /* character size 8 bits */
1140
1141         /* baud rate 115200 */
1142         tty_encode_baud_rate(tty, 115200, 115200);
1143 }
1144
1145 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1146 {
1147         int result;
1148         /* We are done with this URB, resubmit it. Prep the USB to wait for
1149          * another frame */
1150         usb_fill_bulk_urb(urb, serial->parent->usb,
1151                           usb_rcvbulkpipe(serial->parent->usb,
1152                                           serial->in_endp->
1153                                           bEndpointAddress & 0x7F),
1154                           urb->transfer_buffer, serial->rx_data_length,
1155                           hso_std_serial_read_bulk_callback, serial);
1156         /* Give this to the USB subsystem so it can tell us when more data
1157          * arrives. */
1158         result = usb_submit_urb(urb, GFP_ATOMIC);
1159         if (result) {
1160                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1161                         __func__, result);
1162         }
1163 }
1164
1165
1166
1167
1168 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1169 {
1170         int count;
1171         struct urb *curr_urb;
1172
1173         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1174                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1175                 count = put_rxbuf_data(curr_urb, serial);
1176                 if (count == -1)
1177                         return;
1178                 if (count == 0) {
1179                         serial->curr_rx_urb_idx++;
1180                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1181                                 serial->curr_rx_urb_idx = 0;
1182                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1183                 }
1184         }
1185 }
1186
1187 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1188 {
1189         int count = 0;
1190         struct urb *urb;
1191
1192         urb = serial->rx_urb[0];
1193         if (serial->open_count > 0) {
1194                 count = put_rxbuf_data(urb, serial);
1195                 if (count == -1)
1196                         return;
1197         }
1198         /* Re issue a read as long as we receive data. */
1199
1200         if (count == 0 && ((urb->actual_length != 0) ||
1201                            (serial->rx_state == RX_PENDING))) {
1202                 serial->rx_state = RX_SENT;
1203                 hso_mux_serial_read(serial);
1204         } else
1205                 serial->rx_state = RX_IDLE;
1206 }
1207
1208
1209 /* read callback for Diag and CS port */
1210 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1211 {
1212         struct hso_serial *serial = urb->context;
1213         int status = urb->status;
1214
1215         /* sanity check */
1216         if (!serial) {
1217                 D1("serial == NULL");
1218                 return;
1219         } else if (status) {
1220                 handle_usb_error(status, __func__, serial->parent);
1221                 return;
1222         }
1223
1224         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1225         D1("Actual length = %d\n", urb->actual_length);
1226         DUMP1(urb->transfer_buffer, urb->actual_length);
1227
1228         /* Anyone listening? */
1229         if (serial->open_count == 0)
1230                 return;
1231
1232         if (status == 0) {
1233                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1234                         fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1235                 /* Valid data, handle RX data */
1236                 spin_lock(&serial->serial_lock);
1237                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1238                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1239                 spin_unlock(&serial->serial_lock);
1240         } else if (status == -ENOENT || status == -ECONNRESET) {
1241                 /* Unlinked - check for throttled port. */
1242                 D2("Port %d, successfully unlinked urb", serial->minor);
1243                 spin_lock(&serial->serial_lock);
1244                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1245                 hso_resubmit_rx_bulk_urb(serial, urb);
1246                 spin_unlock(&serial->serial_lock);
1247         } else {
1248                 D2("Port %d, status = %d for read urb", serial->minor, status);
1249                 return;
1250         }
1251 }
1252
1253 /*
1254  * This needs to be a tasklet otherwise we will
1255  * end up recursively calling this function.
1256  */
1257 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1258 {
1259         unsigned long flags;
1260
1261         spin_lock_irqsave(&serial->serial_lock, flags);
1262         if ((serial->parent->port_spec & HSO_INTF_MUX))
1263                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1264         else
1265                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1266         spin_unlock_irqrestore(&serial->serial_lock, flags);
1267 }
1268
1269 static  void hso_unthrottle(struct tty_struct *tty)
1270 {
1271         struct hso_serial *serial = get_serial_by_tty(tty);
1272
1273         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1274 }
1275
1276 static void hso_unthrottle_workfunc(struct work_struct *work)
1277 {
1278         struct hso_serial *serial =
1279             container_of(work, struct hso_serial,
1280                          retry_unthrottle_workqueue);
1281         hso_unthrottle_tasklet(serial);
1282 }
1283
1284 /* open the requested serial port */
1285 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1286 {
1287         struct hso_serial *serial = get_serial_by_index(tty->index);
1288         int result;
1289
1290         /* sanity check */
1291         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1292                 WARN_ON(1);
1293                 tty->driver_data = NULL;
1294                 D1("Failed to open port");
1295                 return -ENODEV;
1296         }
1297
1298         mutex_lock(&serial->parent->mutex);
1299         result = usb_autopm_get_interface(serial->parent->interface);
1300         if (result < 0)
1301                 goto err_out;
1302
1303         D1("Opening %d", serial->minor);
1304         kref_get(&serial->parent->ref);
1305
1306         /* setup */
1307         spin_lock_irq(&serial->serial_lock);
1308         tty->driver_data = serial;
1309         tty_kref_put(serial->tty);
1310         serial->tty = tty_kref_get(tty);
1311         spin_unlock_irq(&serial->serial_lock);
1312
1313         /* check for port already opened, if not set the termios */
1314         serial->open_count++;
1315         if (serial->open_count == 1) {
1316                 serial->rx_state = RX_IDLE;
1317                 /* Force default termio settings */
1318                 _hso_serial_set_termios(tty, NULL);
1319                 tasklet_init(&serial->unthrottle_tasklet,
1320                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1321                              (unsigned long)serial);
1322                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1323                           hso_unthrottle_workfunc);
1324                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1325                 if (result) {
1326                         hso_stop_serial_device(serial->parent);
1327                         serial->open_count--;
1328                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1329                 }
1330         } else {
1331                 D1("Port was already open");
1332         }
1333
1334         usb_autopm_put_interface(serial->parent->interface);
1335
1336         /* done */
1337         if (result)
1338                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1339 err_out:
1340         mutex_unlock(&serial->parent->mutex);
1341         return result;
1342 }
1343
1344 /* close the requested serial port */
1345 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1346 {
1347         struct hso_serial *serial = tty->driver_data;
1348         u8 usb_gone;
1349
1350         D1("Closing serial port");
1351
1352         /* Open failed, no close cleanup required */
1353         if (serial == NULL)
1354                 return;
1355
1356         mutex_lock(&serial->parent->mutex);
1357         usb_gone = serial->parent->usb_gone;
1358
1359         if (!usb_gone)
1360                 usb_autopm_get_interface(serial->parent->interface);
1361
1362         /* reset the rts and dtr */
1363         /* do the actual close */
1364         serial->open_count--;
1365
1366         if (serial->open_count <= 0) {
1367                 serial->open_count = 0;
1368                 spin_lock_irq(&serial->serial_lock);
1369                 if (serial->tty == tty) {
1370                         serial->tty->driver_data = NULL;
1371                         serial->tty = NULL;
1372                         tty_kref_put(tty);
1373                 }
1374                 spin_unlock_irq(&serial->serial_lock);
1375                 if (!usb_gone)
1376                         hso_stop_serial_device(serial->parent);
1377                 tasklet_kill(&serial->unthrottle_tasklet);
1378                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1379         }
1380
1381         if (!usb_gone)
1382                 usb_autopm_put_interface(serial->parent->interface);
1383
1384         mutex_unlock(&serial->parent->mutex);
1385
1386         kref_put(&serial->parent->ref, hso_serial_ref_free);
1387 }
1388
1389 /* close the requested serial port */
1390 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1391                             int count)
1392 {
1393         struct hso_serial *serial = get_serial_by_tty(tty);
1394         int space, tx_bytes;
1395         unsigned long flags;
1396
1397         /* sanity check */
1398         if (serial == NULL) {
1399                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1400                 return -ENODEV;
1401         }
1402
1403         spin_lock_irqsave(&serial->serial_lock, flags);
1404
1405         space = serial->tx_data_length - serial->tx_buffer_count;
1406         tx_bytes = (count < space) ? count : space;
1407
1408         if (!tx_bytes)
1409                 goto out;
1410
1411         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1412         serial->tx_buffer_count += tx_bytes;
1413
1414 out:
1415         spin_unlock_irqrestore(&serial->serial_lock, flags);
1416
1417         hso_kick_transmit(serial);
1418         /* done */
1419         return tx_bytes;
1420 }
1421
1422 /* how much room is there for writing */
1423 static int hso_serial_write_room(struct tty_struct *tty)
1424 {
1425         struct hso_serial *serial = get_serial_by_tty(tty);
1426         int room;
1427         unsigned long flags;
1428
1429         spin_lock_irqsave(&serial->serial_lock, flags);
1430         room = serial->tx_data_length - serial->tx_buffer_count;
1431         spin_unlock_irqrestore(&serial->serial_lock, flags);
1432
1433         /* return free room */
1434         return room;
1435 }
1436
1437 /* setup the term */
1438 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1439 {
1440         struct hso_serial *serial = get_serial_by_tty(tty);
1441         unsigned long flags;
1442
1443         if (old)
1444                 D5("Termios called with: cflags new[%d] - old[%d]",
1445                    tty->termios->c_cflag, old->c_cflag);
1446
1447         /* the actual setup */
1448         spin_lock_irqsave(&serial->serial_lock, flags);
1449         if (serial->open_count)
1450                 _hso_serial_set_termios(tty, old);
1451         else
1452                 tty->termios = old;
1453         spin_unlock_irqrestore(&serial->serial_lock, flags);
1454
1455         /* done */
1456 }
1457
1458 /* how many characters in the buffer */
1459 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1460 {
1461         struct hso_serial *serial = get_serial_by_tty(tty);
1462         int chars;
1463         unsigned long flags;
1464
1465         /* sanity check */
1466         if (serial == NULL)
1467                 return 0;
1468
1469         spin_lock_irqsave(&serial->serial_lock, flags);
1470         chars = serial->tx_buffer_count;
1471         spin_unlock_irqrestore(&serial->serial_lock, flags);
1472
1473         return chars;
1474 }
1475 static int tiocmget_submit_urb(struct hso_serial *serial,
1476                                struct hso_tiocmget *tiocmget,
1477                                struct usb_device *usb)
1478 {
1479         int result;
1480
1481         if (serial->parent->usb_gone)
1482                 return -ENODEV;
1483         usb_fill_int_urb(tiocmget->urb, usb,
1484                          usb_rcvintpipe(usb,
1485                                         tiocmget->endp->
1486                                         bEndpointAddress & 0x7F),
1487                          &tiocmget->serial_state_notification,
1488                          sizeof(struct hso_serial_state_notification),
1489                          tiocmget_intr_callback, serial,
1490                          tiocmget->endp->bInterval);
1491         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1492         if (result) {
1493                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1494                          result);
1495         }
1496         return result;
1497
1498 }
1499
1500 static void tiocmget_intr_callback(struct urb *urb)
1501 {
1502         struct hso_serial *serial = urb->context;
1503         struct hso_tiocmget *tiocmget;
1504         int status = urb->status;
1505         u16 UART_state_bitmap, prev_UART_state_bitmap;
1506         struct uart_icount *icount;
1507         struct hso_serial_state_notification *serial_state_notification;
1508         struct usb_device *usb;
1509
1510         /* Sanity checks */
1511         if (!serial)
1512                 return;
1513         if (status) {
1514                 handle_usb_error(status, __func__, serial->parent);
1515                 return;
1516         }
1517         tiocmget = serial->tiocmget;
1518         if (!tiocmget)
1519                 return;
1520         usb = serial->parent->usb;
1521         serial_state_notification = &tiocmget->serial_state_notification;
1522         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1523             serial_state_notification->bNotification != B_NOTIFICATION ||
1524             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1525             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1526             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1527                 dev_warn(&usb->dev,
1528                          "hso received invalid serial state notification\n");
1529                 DUMP(serial_state_notification,
1530                      sizeof(struct hso_serial_state_notification));
1531         } else {
1532
1533                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1534                                                 UART_state_bitmap);
1535                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1536                 icount = &tiocmget->icount;
1537                 spin_lock(&serial->serial_lock);
1538                 if ((UART_state_bitmap & B_OVERRUN) !=
1539                    (prev_UART_state_bitmap & B_OVERRUN))
1540                         icount->parity++;
1541                 if ((UART_state_bitmap & B_PARITY) !=
1542                    (prev_UART_state_bitmap & B_PARITY))
1543                         icount->parity++;
1544                 if ((UART_state_bitmap & B_FRAMING) !=
1545                    (prev_UART_state_bitmap & B_FRAMING))
1546                         icount->frame++;
1547                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1548                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1549                         icount->rng++;
1550                 if ((UART_state_bitmap & B_BREAK) !=
1551                    (prev_UART_state_bitmap & B_BREAK))
1552                         icount->brk++;
1553                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1554                    (prev_UART_state_bitmap & B_TX_CARRIER))
1555                         icount->dsr++;
1556                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1557                    (prev_UART_state_bitmap & B_RX_CARRIER))
1558                         icount->dcd++;
1559                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1560                 spin_unlock(&serial->serial_lock);
1561                 tiocmget->intr_completed = 1;
1562                 wake_up_interruptible(&tiocmget->waitq);
1563         }
1564         memset(serial_state_notification, 0,
1565                sizeof(struct hso_serial_state_notification));
1566         tiocmget_submit_urb(serial,
1567                             tiocmget,
1568                             serial->parent->usb);
1569 }
1570
1571 /*
1572  * next few functions largely stolen from drivers/serial/serial_core.c
1573  */
1574 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1575  * - mask passed in arg for lines of interest
1576  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1577  * Caller should use TIOCGICOUNT to see which one it was
1578  */
1579 static int
1580 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1581 {
1582         DECLARE_WAITQUEUE(wait, current);
1583         struct uart_icount cprev, cnow;
1584         struct hso_tiocmget  *tiocmget;
1585         int ret;
1586
1587         tiocmget = serial->tiocmget;
1588         if (!tiocmget)
1589                 return -ENOENT;
1590         /*
1591          * note the counters on entry
1592          */
1593         spin_lock_irq(&serial->serial_lock);
1594         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1595         spin_unlock_irq(&serial->serial_lock);
1596         add_wait_queue(&tiocmget->waitq, &wait);
1597         for (;;) {
1598                 spin_lock_irq(&serial->serial_lock);
1599                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1600                 spin_unlock_irq(&serial->serial_lock);
1601                 set_current_state(TASK_INTERRUPTIBLE);
1602                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1603                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1604                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1605                         ret = 0;
1606                         break;
1607                 }
1608                 schedule();
1609                 /* see if a signal did it */
1610                 if (signal_pending(current)) {
1611                         ret = -ERESTARTSYS;
1612                         break;
1613                 }
1614                 cprev = cnow;
1615         }
1616         current->state = TASK_RUNNING;
1617         remove_wait_queue(&tiocmget->waitq, &wait);
1618
1619         return ret;
1620 }
1621
1622 /*
1623  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1624  * Return: write counters to the user passed counter struct
1625  * NB: both 1->0 and 0->1 transitions are counted except for
1626  *     RI where only 0->1 is counted.
1627  */
1628 static int hso_get_count(struct tty_struct *tty,
1629                   struct serial_icounter_struct *icount)
1630 {
1631         struct uart_icount cnow;
1632         struct hso_serial *serial = get_serial_by_tty(tty);
1633         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1634
1635         memset(&icount, 0, sizeof(struct serial_icounter_struct));
1636
1637         if (!tiocmget)
1638                  return -ENOENT;
1639         spin_lock_irq(&serial->serial_lock);
1640         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1641         spin_unlock_irq(&serial->serial_lock);
1642
1643         icount->cts         = cnow.cts;
1644         icount->dsr         = cnow.dsr;
1645         icount->rng         = cnow.rng;
1646         icount->dcd         = cnow.dcd;
1647         icount->rx          = cnow.rx;
1648         icount->tx          = cnow.tx;
1649         icount->frame       = cnow.frame;
1650         icount->overrun     = cnow.overrun;
1651         icount->parity      = cnow.parity;
1652         icount->brk         = cnow.brk;
1653         icount->buf_overrun = cnow.buf_overrun;
1654
1655         return 0;
1656 }
1657
1658
1659 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1660 {
1661         int retval;
1662         struct hso_serial *serial = get_serial_by_tty(tty);
1663         struct hso_tiocmget  *tiocmget;
1664         u16 UART_state_bitmap;
1665
1666         /* sanity check */
1667         if (!serial) {
1668                 D1("no tty structures");
1669                 return -EINVAL;
1670         }
1671         spin_lock_irq(&serial->serial_lock);
1672         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1673             ((serial->dtr_state) ? TIOCM_DTR : 0);
1674         tiocmget = serial->tiocmget;
1675         if (tiocmget) {
1676
1677                 UART_state_bitmap = le16_to_cpu(
1678                         tiocmget->prev_UART_state_bitmap);
1679                 if (UART_state_bitmap & B_RING_SIGNAL)
1680                         retval |=  TIOCM_RNG;
1681                 if (UART_state_bitmap & B_RX_CARRIER)
1682                         retval |=  TIOCM_CD;
1683                 if (UART_state_bitmap & B_TX_CARRIER)
1684                         retval |=  TIOCM_DSR;
1685         }
1686         spin_unlock_irq(&serial->serial_lock);
1687         return retval;
1688 }
1689
1690 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1691                                unsigned int set, unsigned int clear)
1692 {
1693         int val = 0;
1694         unsigned long flags;
1695         int if_num;
1696         struct hso_serial *serial = get_serial_by_tty(tty);
1697
1698         /* sanity check */
1699         if (!serial) {
1700                 D1("no tty structures");
1701                 return -EINVAL;
1702         }
1703
1704         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1705                 return -EINVAL;
1706
1707         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1708
1709         spin_lock_irqsave(&serial->serial_lock, flags);
1710         if (set & TIOCM_RTS)
1711                 serial->rts_state = 1;
1712         if (set & TIOCM_DTR)
1713                 serial->dtr_state = 1;
1714
1715         if (clear & TIOCM_RTS)
1716                 serial->rts_state = 0;
1717         if (clear & TIOCM_DTR)
1718                 serial->dtr_state = 0;
1719
1720         if (serial->dtr_state)
1721                 val |= 0x01;
1722         if (serial->rts_state)
1723                 val |= 0x02;
1724
1725         spin_unlock_irqrestore(&serial->serial_lock, flags);
1726
1727         return usb_control_msg(serial->parent->usb,
1728                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1729                                0x21, val, if_num, NULL, 0,
1730                                USB_CTRL_SET_TIMEOUT);
1731 }
1732
1733 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1734                             unsigned int cmd, unsigned long arg)
1735 {
1736         struct hso_serial *serial =  get_serial_by_tty(tty);
1737         int ret = 0;
1738         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1739
1740         if (!serial)
1741                 return -ENODEV;
1742         switch (cmd) {
1743         case TIOCMIWAIT:
1744                 ret = hso_wait_modem_status(serial, arg);
1745                 break;
1746         default:
1747                 ret = -ENOIOCTLCMD;
1748                 break;
1749         }
1750         return ret;
1751 }
1752
1753
1754 /* starts a transmit */
1755 static void hso_kick_transmit(struct hso_serial *serial)
1756 {
1757         u8 *temp;
1758         unsigned long flags;
1759         int res;
1760
1761         spin_lock_irqsave(&serial->serial_lock, flags);
1762         if (!serial->tx_buffer_count)
1763                 goto out;
1764
1765         if (serial->tx_urb_used)
1766                 goto out;
1767
1768         /* Wakeup USB interface if necessary */
1769         if (hso_get_activity(serial->parent) == -EAGAIN)
1770                 goto out;
1771
1772         /* Switch pointers around to avoid memcpy */
1773         temp = serial->tx_buffer;
1774         serial->tx_buffer = serial->tx_data;
1775         serial->tx_data = temp;
1776         serial->tx_data_count = serial->tx_buffer_count;
1777         serial->tx_buffer_count = 0;
1778
1779         /* If temp is set, it means we switched buffers */
1780         if (temp && serial->write_data) {
1781                 res = serial->write_data(serial);
1782                 if (res >= 0)
1783                         serial->tx_urb_used = 1;
1784         }
1785 out:
1786         spin_unlock_irqrestore(&serial->serial_lock, flags);
1787 }
1788
1789 /* make a request (for reading and writing data to muxed serial port) */
1790 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1791                               struct urb *ctrl_urb,
1792                               struct usb_ctrlrequest *ctrl_req,
1793                               u8 *ctrl_urb_data, u32 size)
1794 {
1795         int result;
1796         int pipe;
1797
1798         /* Sanity check */
1799         if (!serial || !ctrl_urb || !ctrl_req) {
1800                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1801                 return -EINVAL;
1802         }
1803
1804         /* initialize */
1805         ctrl_req->wValue = 0;
1806         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1807         ctrl_req->wLength = cpu_to_le16(size);
1808
1809         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1810                 /* Reading command */
1811                 ctrl_req->bRequestType = USB_DIR_IN |
1812                                          USB_TYPE_OPTION_VENDOR |
1813                                          USB_RECIP_INTERFACE;
1814                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1815                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1816         } else {
1817                 /* Writing command */
1818                 ctrl_req->bRequestType = USB_DIR_OUT |
1819                                          USB_TYPE_OPTION_VENDOR |
1820                                          USB_RECIP_INTERFACE;
1821                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1822                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1823         }
1824         /* syslog */
1825         D2("%s command (%02x) len: %d, port: %d",
1826            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1827            ctrl_req->bRequestType, ctrl_req->wLength, port);
1828
1829         /* Load ctrl urb */
1830         ctrl_urb->transfer_flags = 0;
1831         usb_fill_control_urb(ctrl_urb,
1832                              serial->parent->usb,
1833                              pipe,
1834                              (u8 *) ctrl_req,
1835                              ctrl_urb_data, size, ctrl_callback, serial);
1836         /* Send it on merry way */
1837         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1838         if (result) {
1839                 dev_err(&ctrl_urb->dev->dev,
1840                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1841                         result, type);
1842                 return result;
1843         }
1844
1845         /* done */
1846         return size;
1847 }
1848
1849 /* called by intr_callback when read occurs */
1850 static int hso_mux_serial_read(struct hso_serial *serial)
1851 {
1852         if (!serial)
1853                 return -EINVAL;
1854
1855         /* clean data */
1856         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1857         /* make the request */
1858
1859         if (serial->num_rx_urbs != 1) {
1860                 dev_err(&serial->parent->interface->dev,
1861                         "ERROR: mux'd reads with multiple buffers "
1862                         "not possible\n");
1863                 return 0;
1864         }
1865         return mux_device_request(serial,
1866                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1867                                   serial->parent->port_spec & HSO_PORT_MASK,
1868                                   serial->rx_urb[0],
1869                                   &serial->ctrl_req_rx,
1870                                   serial->rx_data[0], serial->rx_data_length);
1871 }
1872
1873 /* used for muxed serial port callback (muxed serial read) */
1874 static void intr_callback(struct urb *urb)
1875 {
1876         struct hso_shared_int *shared_int = urb->context;
1877         struct hso_serial *serial;
1878         unsigned char *port_req;
1879         int status = urb->status;
1880         int i;
1881
1882         usb_mark_last_busy(urb->dev);
1883
1884         /* sanity check */
1885         if (!shared_int)
1886                 return;
1887
1888         /* status check */
1889         if (status) {
1890                 handle_usb_error(status, __func__, NULL);
1891                 return;
1892         }
1893         D4("\n--- Got intr callback 0x%02X ---", status);
1894
1895         /* what request? */
1896         port_req = urb->transfer_buffer;
1897         D4(" port_req = 0x%.2X\n", *port_req);
1898         /* loop over all muxed ports to find the one sending this */
1899         for (i = 0; i < 8; i++) {
1900                 /* max 8 channels on MUX */
1901                 if (*port_req & (1 << i)) {
1902                         serial = get_serial_by_shared_int_and_type(shared_int,
1903                                                                    (1 << i));
1904                         if (serial != NULL) {
1905                                 D1("Pending read interrupt on port %d\n", i);
1906                                 spin_lock(&serial->serial_lock);
1907                                 if (serial->rx_state == RX_IDLE &&
1908                                         serial->open_count > 0) {
1909                                         /* Setup and send a ctrl req read on
1910                                          * port i */
1911                                         if (!serial->rx_urb_filled[0]) {
1912                                                 serial->rx_state = RX_SENT;
1913                                                 hso_mux_serial_read(serial);
1914                                         } else
1915                                                 serial->rx_state = RX_PENDING;
1916                                 } else {
1917                                         D1("Already a read pending on "
1918                                            "port %d or port not open\n", i);
1919                                 }
1920                                 spin_unlock(&serial->serial_lock);
1921                         }
1922                 }
1923         }
1924         /* Resubmit interrupt urb */
1925         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1926 }
1927
1928 /* called for writing to muxed serial port */
1929 static int hso_mux_serial_write_data(struct hso_serial *serial)
1930 {
1931         if (NULL == serial)
1932                 return -EINVAL;
1933
1934         return mux_device_request(serial,
1935                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1936                                   serial->parent->port_spec & HSO_PORT_MASK,
1937                                   serial->tx_urb,
1938                                   &serial->ctrl_req_tx,
1939                                   serial->tx_data, serial->tx_data_count);
1940 }
1941
1942 /* write callback for Diag and CS port */
1943 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1944 {
1945         struct hso_serial *serial = urb->context;
1946         int status = urb->status;
1947         struct tty_struct *tty;
1948
1949         /* sanity check */
1950         if (!serial) {
1951                 D1("serial == NULL");
1952                 return;
1953         }
1954
1955         spin_lock(&serial->serial_lock);
1956         serial->tx_urb_used = 0;
1957         tty = tty_kref_get(serial->tty);
1958         spin_unlock(&serial->serial_lock);
1959         if (status) {
1960                 handle_usb_error(status, __func__, serial->parent);
1961                 tty_kref_put(tty);
1962                 return;
1963         }
1964         hso_put_activity(serial->parent);
1965         if (tty) {
1966                 tty_wakeup(tty);
1967                 tty_kref_put(tty);
1968         }
1969         hso_kick_transmit(serial);
1970
1971         D1(" ");
1972 }
1973
1974 /* called for writing diag or CS serial port */
1975 static int hso_std_serial_write_data(struct hso_serial *serial)
1976 {
1977         int count = serial->tx_data_count;
1978         int result;
1979
1980         usb_fill_bulk_urb(serial->tx_urb,
1981                           serial->parent->usb,
1982                           usb_sndbulkpipe(serial->parent->usb,
1983                                           serial->out_endp->
1984                                           bEndpointAddress & 0x7F),
1985                           serial->tx_data, serial->tx_data_count,
1986                           hso_std_serial_write_bulk_callback, serial);
1987
1988         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1989         if (result) {
1990                 dev_warn(&serial->parent->usb->dev,
1991                          "Failed to submit urb - res %d\n", result);
1992                 return result;
1993         }
1994
1995         return count;
1996 }
1997
1998 /* callback after read or write on muxed serial port */
1999 static void ctrl_callback(struct urb *urb)
2000 {
2001         struct hso_serial *serial = urb->context;
2002         struct usb_ctrlrequest *req;
2003         int status = urb->status;
2004         struct tty_struct *tty;
2005
2006         /* sanity check */
2007         if (!serial)
2008                 return;
2009
2010         spin_lock(&serial->serial_lock);
2011         serial->tx_urb_used = 0;
2012         tty = tty_kref_get(serial->tty);
2013         spin_unlock(&serial->serial_lock);
2014         if (status) {
2015                 handle_usb_error(status, __func__, serial->parent);
2016                 tty_kref_put(tty);
2017                 return;
2018         }
2019
2020         /* what request? */
2021         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2022         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2023         D4("Actual length of urb = %d\n", urb->actual_length);
2024         DUMP1(urb->transfer_buffer, urb->actual_length);
2025
2026         if (req->bRequestType ==
2027             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2028                 /* response to a read command */
2029                 serial->rx_urb_filled[0] = 1;
2030                 spin_lock(&serial->serial_lock);
2031                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2032                 spin_unlock(&serial->serial_lock);
2033         } else {
2034                 hso_put_activity(serial->parent);
2035                 if (tty)
2036                         tty_wakeup(tty);
2037                 /* response to a write command */
2038                 hso_kick_transmit(serial);
2039         }
2040         tty_kref_put(tty);
2041 }
2042
2043 /* handle RX data for serial port */
2044 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2045 {
2046         struct tty_struct *tty;
2047         int write_length_remaining = 0;
2048         int curr_write_len;
2049
2050         /* Sanity check */
2051         if (urb == NULL || serial == NULL) {
2052                 D1("serial = NULL");
2053                 return -2;
2054         }
2055
2056         /* All callers to put_rxbuf_data hold serial_lock */
2057         tty = tty_kref_get(serial->tty);
2058
2059         /* Push data to tty */
2060         if (tty) {
2061                 write_length_remaining = urb->actual_length -
2062                         serial->curr_rx_urb_offset;
2063                 D1("data to push to tty");
2064                 while (write_length_remaining) {
2065                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2066                                 tty_kref_put(tty);
2067                                 return -1;
2068                         }
2069                         curr_write_len =  tty_insert_flip_string
2070                                 (tty, urb->transfer_buffer +
2071                                  serial->curr_rx_urb_offset,
2072                                  write_length_remaining);
2073                         serial->curr_rx_urb_offset += curr_write_len;
2074                         write_length_remaining -= curr_write_len;
2075                         tty_flip_buffer_push(tty);
2076                 }
2077         }
2078         if (write_length_remaining == 0) {
2079                 serial->curr_rx_urb_offset = 0;
2080                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2081         }
2082         tty_kref_put(tty);
2083         return write_length_remaining;
2084 }
2085
2086
2087 /* Base driver functions */
2088
2089 static void hso_log_port(struct hso_device *hso_dev)
2090 {
2091         char *port_type;
2092         char port_dev[20];
2093
2094         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2095         case HSO_PORT_CONTROL:
2096                 port_type = "Control";
2097                 break;
2098         case HSO_PORT_APP:
2099                 port_type = "Application";
2100                 break;
2101         case HSO_PORT_GPS:
2102                 port_type = "GPS";
2103                 break;
2104         case HSO_PORT_GPS_CONTROL:
2105                 port_type = "GPS control";
2106                 break;
2107         case HSO_PORT_APP2:
2108                 port_type = "Application2";
2109                 break;
2110         case HSO_PORT_PCSC:
2111                 port_type = "PCSC";
2112                 break;
2113         case HSO_PORT_DIAG:
2114                 port_type = "Diagnostic";
2115                 break;
2116         case HSO_PORT_DIAG2:
2117                 port_type = "Diagnostic2";
2118                 break;
2119         case HSO_PORT_MODEM:
2120                 port_type = "Modem";
2121                 break;
2122         case HSO_PORT_NETWORK:
2123                 port_type = "Network";
2124                 break;
2125         default:
2126                 port_type = "Unknown";
2127                 break;
2128         }
2129         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2130                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2131         } else
2132                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2133                         dev2ser(hso_dev)->minor);
2134
2135         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2136                 port_type, port_dev);
2137 }
2138
2139 static int hso_start_net_device(struct hso_device *hso_dev)
2140 {
2141         int i, result = 0;
2142         struct hso_net *hso_net = dev2net(hso_dev);
2143
2144         if (!hso_net)
2145                 return -ENODEV;
2146
2147         /* send URBs for all read buffers */
2148         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2149
2150                 /* Prep a receive URB */
2151                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2152                                   hso_dev->usb,
2153                                   usb_rcvbulkpipe(hso_dev->usb,
2154                                                   hso_net->in_endp->
2155                                                   bEndpointAddress & 0x7F),
2156                                   hso_net->mux_bulk_rx_buf_pool[i],
2157                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2158                                   hso_net);
2159
2160                 /* Put it out there so the device can send us stuff */
2161                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2162                                         GFP_NOIO);
2163                 if (result)
2164                         dev_warn(&hso_dev->usb->dev,
2165                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2166                                 i, result);
2167         }
2168
2169         return result;
2170 }
2171
2172 static int hso_stop_net_device(struct hso_device *hso_dev)
2173 {
2174         int i;
2175         struct hso_net *hso_net = dev2net(hso_dev);
2176
2177         if (!hso_net)
2178                 return -ENODEV;
2179
2180         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2181                 if (hso_net->mux_bulk_rx_urb_pool[i])
2182                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2183
2184         }
2185         if (hso_net->mux_bulk_tx_urb)
2186                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2187
2188         return 0;
2189 }
2190
2191 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2192 {
2193         int i, result = 0;
2194         struct hso_serial *serial = dev2ser(hso_dev);
2195
2196         if (!serial)
2197                 return -ENODEV;
2198
2199         /* If it is not the MUX port fill in and submit a bulk urb (already
2200          * allocated in hso_serial_start) */
2201         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2202                 for (i = 0; i < serial->num_rx_urbs; i++) {
2203                         usb_fill_bulk_urb(serial->rx_urb[i],
2204                                           serial->parent->usb,
2205                                           usb_rcvbulkpipe(serial->parent->usb,
2206                                                           serial->in_endp->
2207                                                           bEndpointAddress &
2208                                                           0x7F),
2209                                           serial->rx_data[i],
2210                                           serial->rx_data_length,
2211                                           hso_std_serial_read_bulk_callback,
2212                                           serial);
2213                         result = usb_submit_urb(serial->rx_urb[i], flags);
2214                         if (result) {
2215                                 dev_warn(&serial->parent->usb->dev,
2216                                          "Failed to submit urb - res %d\n",
2217                                          result);
2218                                 break;
2219                         }
2220                 }
2221         } else {
2222                 mutex_lock(&serial->shared_int->shared_int_lock);
2223                 if (!serial->shared_int->use_count) {
2224                         result =
2225                             hso_mux_submit_intr_urb(serial->shared_int,
2226                                                     hso_dev->usb, flags);
2227                 }
2228                 serial->shared_int->use_count++;
2229                 mutex_unlock(&serial->shared_int->shared_int_lock);
2230         }
2231         if (serial->tiocmget)
2232                 tiocmget_submit_urb(serial,
2233                                     serial->tiocmget,
2234                                     serial->parent->usb);
2235         return result;
2236 }
2237
2238 static int hso_stop_serial_device(struct hso_device *hso_dev)
2239 {
2240         int i;
2241         struct hso_serial *serial = dev2ser(hso_dev);
2242         struct hso_tiocmget  *tiocmget;
2243
2244         if (!serial)
2245                 return -ENODEV;
2246
2247         for (i = 0; i < serial->num_rx_urbs; i++) {
2248                 if (serial->rx_urb[i]) {
2249                                 usb_kill_urb(serial->rx_urb[i]);
2250                                 serial->rx_urb_filled[i] = 0;
2251                 }
2252         }
2253         serial->curr_rx_urb_idx = 0;
2254         serial->curr_rx_urb_offset = 0;
2255
2256         if (serial->tx_urb)
2257                 usb_kill_urb(serial->tx_urb);
2258
2259         if (serial->shared_int) {
2260                 mutex_lock(&serial->shared_int->shared_int_lock);
2261                 if (serial->shared_int->use_count &&
2262                     (--serial->shared_int->use_count == 0)) {
2263                         struct urb *urb;
2264
2265                         urb = serial->shared_int->shared_intr_urb;
2266                         if (urb)
2267                                 usb_kill_urb(urb);
2268                 }
2269                 mutex_unlock(&serial->shared_int->shared_int_lock);
2270         }
2271         tiocmget = serial->tiocmget;
2272         if (tiocmget) {
2273                 wake_up_interruptible(&tiocmget->waitq);
2274                 usb_kill_urb(tiocmget->urb);
2275         }
2276
2277         return 0;
2278 }
2279
2280 static void hso_serial_common_free(struct hso_serial *serial)
2281 {
2282         int i;
2283
2284         if (serial->parent->dev)
2285                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2286
2287         tty_unregister_device(tty_drv, serial->minor);
2288
2289         for (i = 0; i < serial->num_rx_urbs; i++) {
2290                 /* unlink and free RX URB */
2291                 usb_free_urb(serial->rx_urb[i]);
2292                 /* free the RX buffer */
2293                 kfree(serial->rx_data[i]);
2294         }
2295
2296         /* unlink and free TX URB */
2297         usb_free_urb(serial->tx_urb);
2298         kfree(serial->tx_data);
2299 }
2300
2301 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2302                                     int rx_size, int tx_size)
2303 {
2304         struct device *dev;
2305         int minor;
2306         int i;
2307
2308         minor = get_free_serial_index();
2309         if (minor < 0)
2310                 goto exit;
2311
2312         /* register our minor number */
2313         serial->parent->dev = tty_register_device(tty_drv, minor,
2314                                         &serial->parent->interface->dev);
2315         dev = serial->parent->dev;
2316         dev_set_drvdata(dev, serial->parent);
2317         i = device_create_file(dev, &dev_attr_hsotype);
2318
2319         /* fill in specific data for later use */
2320         serial->minor = minor;
2321         serial->magic = HSO_SERIAL_MAGIC;
2322         spin_lock_init(&serial->serial_lock);
2323         serial->num_rx_urbs = num_urbs;
2324
2325         /* RX, allocate urb and initialize */
2326
2327         /* prepare our RX buffer */
2328         serial->rx_data_length = rx_size;
2329         for (i = 0; i < serial->num_rx_urbs; i++) {
2330                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2331                 if (!serial->rx_urb[i]) {
2332                         dev_err(dev, "Could not allocate urb?\n");
2333                         goto exit;
2334                 }
2335                 serial->rx_urb[i]->transfer_buffer = NULL;
2336                 serial->rx_urb[i]->transfer_buffer_length = 0;
2337                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2338                                              GFP_KERNEL);
2339                 if (!serial->rx_data[i]) {
2340                         dev_err(dev, "%s - Out of memory\n", __func__);
2341                         goto exit;
2342                 }
2343         }
2344
2345         /* TX, allocate urb and initialize */
2346         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2347         if (!serial->tx_urb) {
2348                 dev_err(dev, "Could not allocate urb?\n");
2349                 goto exit;
2350         }
2351         serial->tx_urb->transfer_buffer = NULL;
2352         serial->tx_urb->transfer_buffer_length = 0;
2353         /* prepare our TX buffer */
2354         serial->tx_data_count = 0;
2355         serial->tx_buffer_count = 0;
2356         serial->tx_data_length = tx_size;
2357         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2358         if (!serial->tx_data) {
2359                 dev_err(dev, "%s - Out of memory\n", __func__);
2360                 goto exit;
2361         }
2362         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2363         if (!serial->tx_buffer) {
2364                 dev_err(dev, "%s - Out of memory\n", __func__);
2365                 goto exit;
2366         }
2367
2368         return 0;
2369 exit:
2370         hso_serial_common_free(serial);
2371         return -1;
2372 }
2373
2374 /* Creates a general hso device */
2375 static struct hso_device *hso_create_device(struct usb_interface *intf,
2376                                             int port_spec)
2377 {
2378         struct hso_device *hso_dev;
2379
2380         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2381         if (!hso_dev)
2382                 return NULL;
2383
2384         hso_dev->port_spec = port_spec;
2385         hso_dev->usb = interface_to_usbdev(intf);
2386         hso_dev->interface = intf;
2387         kref_init(&hso_dev->ref);
2388         mutex_init(&hso_dev->mutex);
2389
2390         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2391         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2392         INIT_WORK(&hso_dev->reset_device, reset_device);
2393
2394         return hso_dev;
2395 }
2396
2397 /* Removes a network device in the network device table */
2398 static int remove_net_device(struct hso_device *hso_dev)
2399 {
2400         int i;
2401
2402         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2403                 if (network_table[i] == hso_dev) {
2404                         network_table[i] = NULL;
2405                         break;
2406                 }
2407         }
2408         if (i == HSO_MAX_NET_DEVICES)
2409                 return -1;
2410         return 0;
2411 }
2412
2413 /* Frees our network device */
2414 static void hso_free_net_device(struct hso_device *hso_dev)
2415 {
2416         int i;
2417         struct hso_net *hso_net = dev2net(hso_dev);
2418
2419         if (!hso_net)
2420                 return;
2421
2422         remove_net_device(hso_net->parent);
2423
2424         if (hso_net->net) {
2425                 unregister_netdev(hso_net->net);
2426                 free_netdev(hso_net->net);
2427         }
2428
2429         /* start freeing */
2430         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2431                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2432                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2433                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2434         }
2435         usb_free_urb(hso_net->mux_bulk_tx_urb);
2436         kfree(hso_net->mux_bulk_tx_buf);
2437         hso_net->mux_bulk_tx_buf = NULL;
2438
2439         kfree(hso_dev);
2440 }
2441
2442 static const struct net_device_ops hso_netdev_ops = {
2443         .ndo_open       = hso_net_open,
2444         .ndo_stop       = hso_net_close,
2445         .ndo_start_xmit = hso_net_start_xmit,
2446         .ndo_tx_timeout = hso_net_tx_timeout,
2447 };
2448
2449 /* initialize the network interface */
2450 static void hso_net_init(struct net_device *net)
2451 {
2452         struct hso_net *hso_net = netdev_priv(net);
2453
2454         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2455
2456         /* fill in the other fields */
2457         net->netdev_ops = &hso_netdev_ops;
2458         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2459         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2460         net->type = ARPHRD_NONE;
2461         net->mtu = DEFAULT_MTU - 14;
2462         net->tx_queue_len = 10;
2463         SET_ETHTOOL_OPS(net, &ops);
2464
2465         /* and initialize the semaphore */
2466         spin_lock_init(&hso_net->net_lock);
2467 }
2468
2469 /* Adds a network device in the network device table */
2470 static int add_net_device(struct hso_device *hso_dev)
2471 {
2472         int i;
2473
2474         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2475                 if (network_table[i] == NULL) {
2476                         network_table[i] = hso_dev;
2477                         break;
2478                 }
2479         }
2480         if (i == HSO_MAX_NET_DEVICES)
2481                 return -1;
2482         return 0;
2483 }
2484
2485 static int hso_rfkill_set_block(void *data, bool blocked)
2486 {
2487         struct hso_device *hso_dev = data;
2488         int enabled = !blocked;
2489         int rv;
2490
2491         mutex_lock(&hso_dev->mutex);
2492         if (hso_dev->usb_gone)
2493                 rv = 0;
2494         else
2495                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2496                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2497                                        USB_CTRL_SET_TIMEOUT);
2498         mutex_unlock(&hso_dev->mutex);
2499         return rv;
2500 }
2501
2502 static const struct rfkill_ops hso_rfkill_ops = {
2503         .set_block = hso_rfkill_set_block,
2504 };
2505
2506 /* Creates and sets up everything for rfkill */
2507 static void hso_create_rfkill(struct hso_device *hso_dev,
2508                              struct usb_interface *interface)
2509 {
2510         struct hso_net *hso_net = dev2net(hso_dev);
2511         struct device *dev = &hso_net->net->dev;
2512         char *rfkn;
2513
2514         rfkn = kzalloc(20, GFP_KERNEL);
2515         if (!rfkn)
2516                 dev_err(dev, "%s - Out of memory\n", __func__);
2517
2518         snprintf(rfkn, 20, "hso-%d",
2519                  interface->altsetting->desc.bInterfaceNumber);
2520
2521         hso_net->rfkill = rfkill_alloc(rfkn,
2522                                        &interface_to_usbdev(interface)->dev,
2523                                        RFKILL_TYPE_WWAN,
2524                                        &hso_rfkill_ops, hso_dev);
2525         if (!hso_net->rfkill) {
2526                 dev_err(dev, "%s - Out of memory\n", __func__);
2527                 kfree(rfkn);
2528                 return;
2529         }
2530         if (rfkill_register(hso_net->rfkill) < 0) {
2531                 rfkill_destroy(hso_net->rfkill);
2532                 kfree(rfkn);
2533                 hso_net->rfkill = NULL;
2534                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2535                 return;
2536         }
2537 }
2538
2539 static struct device_type hso_type = {
2540         .name   = "wwan",
2541 };
2542
2543 /* Creates our network device */
2544 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2545                                                 int port_spec)
2546 {
2547         int result, i;
2548         struct net_device *net;
2549         struct hso_net *hso_net;
2550         struct hso_device *hso_dev;
2551
2552         hso_dev = hso_create_device(interface, port_spec);
2553         if (!hso_dev)
2554                 return NULL;
2555
2556         /* allocate our network device, then we can put in our private data */
2557         /* call hso_net_init to do the basic initialization */
2558         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2559         if (!net) {
2560                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2561                 goto exit;
2562         }
2563
2564         hso_net = netdev_priv(net);
2565
2566         hso_dev->port_data.dev_net = hso_net;
2567         hso_net->net = net;
2568         hso_net->parent = hso_dev;
2569
2570         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2571                                       USB_DIR_IN);
2572         if (!hso_net->in_endp) {
2573                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2574                 goto exit;
2575         }
2576         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2577                                        USB_DIR_OUT);
2578         if (!hso_net->out_endp) {
2579                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2580                 goto exit;
2581         }
2582         SET_NETDEV_DEV(net, &interface->dev);
2583         SET_NETDEV_DEVTYPE(net, &hso_type);
2584
2585         /* registering our net device */
2586         result = register_netdev(net);
2587         if (result) {
2588                 dev_err(&interface->dev, "Failed to register device\n");
2589                 goto exit;
2590         }
2591
2592         /* start allocating */
2593         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2594                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2595                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2596                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2597                         goto exit;
2598                 }
2599                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2600                                                            GFP_KERNEL);
2601                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2602                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2603                         goto exit;
2604                 }
2605         }
2606         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2607         if (!hso_net->mux_bulk_tx_urb) {
2608                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2609                 goto exit;
2610         }
2611         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2612         if (!hso_net->mux_bulk_tx_buf) {
2613                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2614                 goto exit;
2615         }
2616
2617         add_net_device(hso_dev);
2618
2619         hso_log_port(hso_dev);
2620
2621         hso_create_rfkill(hso_dev, interface);
2622
2623         return hso_dev;
2624 exit:
2625         hso_free_net_device(hso_dev);
2626         return NULL;
2627 }
2628
2629 static void hso_free_tiomget(struct hso_serial *serial)
2630 {
2631         struct hso_tiocmget *tiocmget;
2632         if (!serial)
2633                 return;
2634         tiocmget = serial->tiocmget;
2635         if (tiocmget) {
2636                 usb_free_urb(tiocmget->urb);
2637                 tiocmget->urb = NULL;
2638                 serial->tiocmget = NULL;
2639                 kfree(tiocmget);
2640         }
2641 }
2642
2643 /* Frees an AT channel ( goes for both mux and non-mux ) */
2644 static void hso_free_serial_device(struct hso_device *hso_dev)
2645 {
2646         struct hso_serial *serial = dev2ser(hso_dev);
2647
2648         if (!serial)
2649                 return;
2650         set_serial_by_index(serial->minor, NULL);
2651
2652         hso_serial_common_free(serial);
2653
2654         if (serial->shared_int) {
2655                 mutex_lock(&serial->shared_int->shared_int_lock);
2656                 if (--serial->shared_int->ref_count == 0)
2657                         hso_free_shared_int(serial->shared_int);
2658                 else
2659                         mutex_unlock(&serial->shared_int->shared_int_lock);
2660         }
2661         hso_free_tiomget(serial);
2662         kfree(serial);
2663         kfree(hso_dev);
2664 }
2665
2666 /* Creates a bulk AT channel */
2667 static struct hso_device *hso_create_bulk_serial_device(
2668                         struct usb_interface *interface, int port)
2669 {
2670         struct hso_device *hso_dev;
2671         struct hso_serial *serial;
2672         int num_urbs;
2673         struct hso_tiocmget *tiocmget;
2674
2675         hso_dev = hso_create_device(interface, port);
2676         if (!hso_dev)
2677                 return NULL;
2678
2679         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2680         if (!serial)
2681                 goto exit;
2682
2683         serial->parent = hso_dev;
2684         hso_dev->port_data.dev_serial = serial;
2685
2686         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2687                 num_urbs = 2;
2688                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2689                                            GFP_KERNEL);
2690                 /* it isn't going to break our heart if serial->tiocmget
2691                  *  allocation fails don't bother checking this.
2692                  */
2693                 if (serial->tiocmget) {
2694                         tiocmget = serial->tiocmget;
2695                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2696                         if (tiocmget->urb) {
2697                                 mutex_init(&tiocmget->mutex);
2698                                 init_waitqueue_head(&tiocmget->waitq);
2699                                 tiocmget->endp = hso_get_ep(
2700                                         interface,
2701                                         USB_ENDPOINT_XFER_INT,
2702                                         USB_DIR_IN);
2703                         } else
2704                                 hso_free_tiomget(serial);
2705                 }
2706         }
2707         else
2708                 num_urbs = 1;
2709
2710         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2711                                      BULK_URB_TX_SIZE))
2712                 goto exit;
2713
2714         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2715                                      USB_DIR_IN);
2716         if (!serial->in_endp) {
2717                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2718                 goto exit2;
2719         }
2720
2721         if (!
2722             (serial->out_endp =
2723              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2724                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2725                 goto exit2;
2726         }
2727
2728         serial->write_data = hso_std_serial_write_data;
2729
2730         /* and record this serial */
2731         set_serial_by_index(serial->minor, serial);
2732
2733         /* setup the proc dirs and files if needed */
2734         hso_log_port(hso_dev);
2735
2736         /* done, return it */
2737         return hso_dev;
2738
2739 exit2:
2740         hso_serial_common_free(serial);
2741 exit:
2742         hso_free_tiomget(serial);
2743         kfree(serial);
2744         kfree(hso_dev);
2745         return NULL;
2746 }
2747
2748 /* Creates a multiplexed AT channel */
2749 static
2750 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2751                                                 int port,
2752                                                 struct hso_shared_int *mux)
2753 {
2754         struct hso_device *hso_dev;
2755         struct hso_serial *serial;
2756         int port_spec;
2757
2758         port_spec = HSO_INTF_MUX;
2759         port_spec &= ~HSO_PORT_MASK;
2760
2761         port_spec |= hso_mux_to_port(port);
2762         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2763                 return NULL;
2764
2765         hso_dev = hso_create_device(interface, port_spec);
2766         if (!hso_dev)
2767                 return NULL;
2768
2769         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2770         if (!serial)
2771                 goto exit;
2772
2773         hso_dev->port_data.dev_serial = serial;
2774         serial->parent = hso_dev;
2775
2776         if (hso_serial_common_create
2777             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2778                 goto exit;
2779
2780         serial->tx_data_length--;
2781         serial->write_data = hso_mux_serial_write_data;
2782
2783         serial->shared_int = mux;
2784         mutex_lock(&serial->shared_int->shared_int_lock);
2785         serial->shared_int->ref_count++;
2786         mutex_unlock(&serial->shared_int->shared_int_lock);
2787
2788         /* and record this serial */
2789         set_serial_by_index(serial->minor, serial);
2790
2791         /* setup the proc dirs and files if needed */
2792         hso_log_port(hso_dev);
2793
2794         /* done, return it */
2795         return hso_dev;
2796
2797 exit:
2798         if (serial) {
2799                 tty_unregister_device(tty_drv, serial->minor);
2800                 kfree(serial);
2801         }
2802         if (hso_dev)
2803                 kfree(hso_dev);
2804         return NULL;
2805
2806 }
2807
2808 static void hso_free_shared_int(struct hso_shared_int *mux)
2809 {
2810         usb_free_urb(mux->shared_intr_urb);
2811         kfree(mux->shared_intr_buf);
2812         mutex_unlock(&mux->shared_int_lock);
2813         kfree(mux);
2814 }
2815
2816 static
2817 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2818 {
2819         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2820
2821         if (!mux)
2822                 return NULL;
2823
2824         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2825                                     USB_DIR_IN);
2826         if (!mux->intr_endp) {
2827                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2828                 goto exit;
2829         }
2830
2831         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2832         if (!mux->shared_intr_urb) {
2833                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2834                 goto exit;
2835         }
2836         mux->shared_intr_buf =
2837                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2838                         GFP_KERNEL);
2839         if (!mux->shared_intr_buf) {
2840                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2841                 goto exit;
2842         }
2843
2844         mutex_init(&mux->shared_int_lock);
2845
2846         return mux;
2847
2848 exit:
2849         kfree(mux->shared_intr_buf);
2850         usb_free_urb(mux->shared_intr_urb);
2851         kfree(mux);
2852         return NULL;
2853 }
2854
2855 /* Gets the port spec for a certain interface */
2856 static int hso_get_config_data(struct usb_interface *interface)
2857 {
2858         struct usb_device *usbdev = interface_to_usbdev(interface);
2859         u8 config_data[17];
2860         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2861         s32 result;
2862
2863         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2864                             0x86, 0xC0, 0, 0, config_data, 17,
2865                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2866                 return -EIO;
2867         }
2868
2869         switch (config_data[if_num]) {
2870         case 0x0:
2871                 result = 0;
2872                 break;
2873         case 0x1:
2874                 result = HSO_PORT_DIAG;
2875                 break;
2876         case 0x2:
2877                 result = HSO_PORT_GPS;
2878                 break;
2879         case 0x3:
2880                 result = HSO_PORT_GPS_CONTROL;
2881                 break;
2882         case 0x4:
2883                 result = HSO_PORT_APP;
2884                 break;
2885         case 0x5:
2886                 result = HSO_PORT_APP2;
2887                 break;
2888         case 0x6:
2889                 result = HSO_PORT_CONTROL;
2890                 break;
2891         case 0x7:
2892                 result = HSO_PORT_NETWORK;
2893                 break;
2894         case 0x8:
2895                 result = HSO_PORT_MODEM;
2896                 break;
2897         case 0x9:
2898                 result = HSO_PORT_MSD;
2899                 break;
2900         case 0xa:
2901                 result = HSO_PORT_PCSC;
2902                 break;
2903         case 0xb:
2904                 result = HSO_PORT_VOICE;
2905                 break;
2906         default:
2907                 result = 0;
2908         }
2909
2910         if (result)
2911                 result |= HSO_INTF_BULK;
2912
2913         if (config_data[16] & 0x1)
2914                 result |= HSO_INFO_CRC_BUG;
2915
2916         return result;
2917 }
2918
2919 /* called once for each interface upon device insertion */
2920 static int hso_probe(struct usb_interface *interface,
2921                      const struct usb_device_id *id)
2922 {
2923         int mux, i, if_num, port_spec;
2924         unsigned char port_mask;
2925         struct hso_device *hso_dev = NULL;
2926         struct hso_shared_int *shared_int;
2927         struct hso_device *tmp_dev = NULL;
2928
2929         if_num = interface->altsetting->desc.bInterfaceNumber;
2930
2931         /* Get the interface/port specification from either driver_info or from
2932          * the device itself */
2933         if (id->driver_info)
2934                 port_spec = ((u32 *)(id->driver_info))[if_num];
2935         else
2936                 port_spec = hso_get_config_data(interface);
2937
2938         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2939                 dev_err(&interface->dev, "Not our interface\n");
2940                 return -ENODEV;
2941         }
2942         /* Check if we need to switch to alt interfaces prior to port
2943          * configuration */
2944         if (interface->num_altsetting > 1)
2945                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2946         interface->needs_remote_wakeup = 1;
2947
2948         /* Allocate new hso device(s) */
2949         switch (port_spec & HSO_INTF_MASK) {
2950         case HSO_INTF_MUX:
2951                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2952                         /* Create the network device */
2953                         if (!disable_net) {
2954                                 hso_dev = hso_create_net_device(interface,
2955                                                                 port_spec);
2956                                 if (!hso_dev)
2957                                         goto exit;
2958                                 tmp_dev = hso_dev;
2959                         }
2960                 }
2961
2962                 if (hso_get_mux_ports(interface, &port_mask))
2963                         /* TODO: de-allocate everything */
2964                         goto exit;
2965
2966                 shared_int = hso_create_shared_int(interface);
2967                 if (!shared_int)
2968                         goto exit;
2969
2970                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2971                         if (port_mask & i) {
2972                                 hso_dev = hso_create_mux_serial_device(
2973                                                 interface, i, shared_int);
2974                                 if (!hso_dev)
2975                                         goto exit;
2976                         }
2977                 }
2978
2979                 if (tmp_dev)
2980                         hso_dev = tmp_dev;
2981                 break;
2982
2983         case HSO_INTF_BULK:
2984                 /* It's a regular bulk interface */
2985                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2986                         if (!disable_net)
2987                                 hso_dev =
2988                                     hso_create_net_device(interface, port_spec);
2989                 } else {
2990                         hso_dev =
2991                             hso_create_bulk_serial_device(interface, port_spec);
2992                 }
2993                 if (!hso_dev)
2994                         goto exit;
2995                 break;
2996         default:
2997                 goto exit;
2998         }
2999
3000         /* save our data pointer in this device */
3001         usb_set_intfdata(interface, hso_dev);
3002
3003         /* done */
3004         return 0;
3005 exit:
3006         hso_free_interface(interface);
3007         return -ENODEV;
3008 }
3009
3010 /* device removed, cleaning up */
3011 static void hso_disconnect(struct usb_interface *interface)
3012 {
3013         hso_free_interface(interface);
3014
3015         /* remove reference of our private data */
3016         usb_set_intfdata(interface, NULL);
3017 }
3018
3019 static void async_get_intf(struct work_struct *data)
3020 {
3021         struct hso_device *hso_dev =
3022             container_of(data, struct hso_device, async_get_intf);
3023         usb_autopm_get_interface(hso_dev->interface);
3024 }
3025
3026 static void async_put_intf(struct work_struct *data)
3027 {
3028         struct hso_device *hso_dev =
3029             container_of(data, struct hso_device, async_put_intf);
3030         usb_autopm_put_interface(hso_dev->interface);
3031 }
3032
3033 static int hso_get_activity(struct hso_device *hso_dev)
3034 {
3035         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3036                 if (!hso_dev->is_active) {
3037                         hso_dev->is_active = 1;
3038                         schedule_work(&hso_dev->async_get_intf);
3039                 }
3040         }
3041
3042         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3043                 return -EAGAIN;
3044
3045         usb_mark_last_busy(hso_dev->usb);
3046
3047         return 0;
3048 }
3049
3050 static int hso_put_activity(struct hso_device *hso_dev)
3051 {
3052         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3053                 if (hso_dev->is_active) {
3054                         hso_dev->is_active = 0;
3055                         schedule_work(&hso_dev->async_put_intf);
3056                         return -EAGAIN;
3057                 }
3058         }
3059         hso_dev->is_active = 0;
3060         return 0;
3061 }
3062
3063 /* called by kernel when we need to suspend device */
3064 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3065 {
3066         int i, result;
3067
3068         /* Stop all serial ports */
3069         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3070                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3071                         result = hso_stop_serial_device(serial_table[i]);
3072                         if (result)
3073                                 goto out;
3074                 }
3075         }
3076
3077         /* Stop all network ports */
3078         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3079                 if (network_table[i] &&
3080                     (network_table[i]->interface == iface)) {
3081                         result = hso_stop_net_device(network_table[i]);
3082                         if (result)
3083                                 goto out;
3084                 }
3085         }
3086
3087 out:
3088         return 0;
3089 }
3090
3091 /* called by kernel when we need to resume device */
3092 static int hso_resume(struct usb_interface *iface)
3093 {
3094         int i, result = 0;
3095         struct hso_net *hso_net;
3096
3097         /* Start all serial ports */
3098         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3099                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3100                         if (dev2ser(serial_table[i])->open_count) {
3101                                 result =
3102                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3103                                 hso_kick_transmit(dev2ser(serial_table[i]));
3104                                 if (result)
3105                                         goto out;
3106                         }
3107                 }
3108         }
3109
3110         /* Start all network ports */
3111         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3112                 if (network_table[i] &&
3113                     (network_table[i]->interface == iface)) {
3114                         hso_net = dev2net(network_table[i]);
3115                         if (hso_net->flags & IFF_UP) {
3116                                 /* First transmit any lingering data,
3117                                    then restart the device. */
3118                                 if (hso_net->skb_tx_buf) {
3119                                         dev_dbg(&iface->dev,
3120                                                 "Transmitting"
3121                                                 " lingering data\n");
3122                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3123                                                            hso_net->net);
3124                                         hso_net->skb_tx_buf = NULL;
3125                                 }
3126                                 result = hso_start_net_device(network_table[i]);
3127                                 if (result)
3128                                         goto out;
3129                         }
3130                 }
3131         }
3132
3133 out:
3134         return result;
3135 }
3136
3137 static void reset_device(struct work_struct *data)
3138 {
3139         struct hso_device *hso_dev =
3140             container_of(data, struct hso_device, reset_device);
3141         struct usb_device *usb = hso_dev->usb;
3142         int result;
3143
3144         if (hso_dev->usb_gone) {
3145                 D1("No reset during disconnect\n");
3146         } else {
3147                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3148                 if (result < 0)
3149                         D1("unable to lock device for reset: %d\n", result);
3150                 else {
3151                         usb_reset_device(usb);
3152                         usb_unlock_device(usb);
3153                 }
3154         }
3155 }
3156
3157 static void hso_serial_ref_free(struct kref *ref)
3158 {
3159         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3160
3161         hso_free_serial_device(hso_dev);
3162 }
3163
3164 static void hso_free_interface(struct usb_interface *interface)
3165 {
3166         struct hso_serial *hso_dev;
3167         struct tty_struct *tty;
3168         int i;
3169
3170         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3171                 if (serial_table[i] &&
3172                     (serial_table[i]->interface == interface)) {
3173                         hso_dev = dev2ser(serial_table[i]);
3174                         spin_lock_irq(&hso_dev->serial_lock);
3175                         tty = tty_kref_get(hso_dev->tty);
3176                         spin_unlock_irq(&hso_dev->serial_lock);
3177                         if (tty)
3178                                 tty_hangup(tty);
3179                         mutex_lock(&hso_dev->parent->mutex);
3180                         tty_kref_put(tty);
3181                         hso_dev->parent->usb_gone = 1;
3182                         mutex_unlock(&hso_dev->parent->mutex);
3183                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3184                 }
3185         }
3186
3187         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3188                 if (network_table[i] &&
3189                     (network_table[i]->interface == interface)) {
3190                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3191                         /* hso_stop_net_device doesn't stop the net queue since
3192                          * traffic needs to start it again when suspended */
3193                         netif_stop_queue(dev2net(network_table[i])->net);
3194                         hso_stop_net_device(network_table[i]);
3195                         cancel_work_sync(&network_table[i]->async_put_intf);
3196                         cancel_work_sync(&network_table[i]->async_get_intf);
3197                         if (rfk) {
3198                                 rfkill_unregister(rfk);
3199                                 rfkill_destroy(rfk);
3200                         }
3201                         hso_free_net_device(network_table[i]);
3202                 }
3203         }
3204 }
3205
3206 /* Helper functions */
3207
3208 /* Get the endpoint ! */
3209 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3210                                                   int type, int dir)
3211 {
3212         int i;
3213         struct usb_host_interface *iface = intf->cur_altsetting;
3214         struct usb_endpoint_descriptor *endp;
3215
3216         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3217                 endp = &iface->endpoint[i].desc;
3218                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3219                     (usb_endpoint_type(endp) == type))
3220                         return endp;
3221         }
3222
3223         return NULL;
3224 }
3225
3226 /* Get the byte that describes which ports are enabled */
3227 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3228 {
3229         int i;
3230         struct usb_host_interface *iface = intf->cur_altsetting;
3231
3232         if (iface->extralen == 3) {
3233                 *ports = iface->extra[2];
3234                 return 0;
3235         }
3236
3237         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3238                 if (iface->endpoint[i].extralen == 3) {
3239                         *ports = iface->endpoint[i].extra[2];
3240                         return 0;
3241                 }
3242         }
3243
3244         return -1;
3245 }
3246
3247 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3248 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3249                                    struct usb_device *usb, gfp_t gfp)
3250 {
3251         int result;
3252
3253         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3254                          usb_rcvintpipe(usb,
3255                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3256                          shared_int->shared_intr_buf,
3257                          1,
3258                          intr_callback, shared_int,
3259                          shared_int->intr_endp->bInterval);
3260
3261         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3262         if (result)
3263                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3264                         result);
3265
3266         return result;
3267 }
3268
3269 /* operations setup of the serial interface */
3270 static const struct tty_operations hso_serial_ops = {
3271         .open = hso_serial_open,
3272         .close = hso_serial_close,
3273         .write = hso_serial_write,
3274         .write_room = hso_serial_write_room,
3275         .ioctl = hso_serial_ioctl,
3276         .set_termios = hso_serial_set_termios,
3277         .chars_in_buffer = hso_serial_chars_in_buffer,
3278         .tiocmget = hso_serial_tiocmget,
3279         .tiocmset = hso_serial_tiocmset,
3280         .get_icount = hso_get_count,
3281         .unthrottle = hso_unthrottle
3282 };
3283
3284 static struct usb_driver hso_driver = {
3285         .name = driver_name,
3286         .probe = hso_probe,
3287         .disconnect = hso_disconnect,
3288         .id_table = hso_ids,
3289         .suspend = hso_suspend,
3290         .resume = hso_resume,
3291         .reset_resume = hso_resume,
3292         .supports_autosuspend = 1,
3293 };
3294
3295 static int __init hso_init(void)
3296 {
3297         int i;
3298         int result;
3299
3300         /* put it in the log */
3301         printk(KERN_INFO "hso: %s\n", version);
3302
3303         /* Initialise the serial table semaphore and table */
3304         spin_lock_init(&serial_table_lock);
3305         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3306                 serial_table[i] = NULL;
3307
3308         /* allocate our driver using the proper amount of supported minors */
3309         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3310         if (!tty_drv)
3311                 return -ENOMEM;
3312
3313         /* fill in all needed values */
3314         tty_drv->magic = TTY_DRIVER_MAGIC;
3315         tty_drv->owner = THIS_MODULE;
3316         tty_drv->driver_name = driver_name;
3317         tty_drv->name = tty_filename;
3318
3319         /* if major number is provided as parameter, use that one */
3320         if (tty_major)
3321                 tty_drv->major = tty_major;
3322
3323         tty_drv->minor_start = 0;
3324         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3325         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3326         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3327         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3328         tty_drv->init_termios = tty_std_termios;
3329         hso_init_termios(&tty_drv->init_termios);
3330         tty_set_operations(tty_drv, &hso_serial_ops);
3331
3332         /* register the tty driver */
3333         result = tty_register_driver(tty_drv);
3334         if (result) {
3335                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3336                         __func__, result);
3337                 return result;
3338         }
3339
3340         /* register this module as an usb driver */
3341         result = usb_register(&hso_driver);
3342         if (result) {
3343                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3344                         result);
3345                 /* cleanup serial interface */
3346                 tty_unregister_driver(tty_drv);
3347                 return result;
3348         }
3349
3350         /* done */
3351         return 0;
3352 }
3353
3354 static void __exit hso_exit(void)
3355 {
3356         printk(KERN_INFO "hso: unloaded\n");
3357
3358         tty_unregister_driver(tty_drv);
3359         /* deregister the usb driver */
3360         usb_deregister(&hso_driver);
3361 }
3362
3363 /* Module definitions */
3364 module_init(hso_init);
3365 module_exit(hso_exit);
3366
3367 MODULE_AUTHOR(MOD_AUTHOR);
3368 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3369 MODULE_LICENSE(MOD_LICENSE);
3370
3371 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3372 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3373 module_param(debug, int, S_IRUGO | S_IWUSR);
3374
3375 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3376 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3377 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3378
3379 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3380 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3381 module_param(disable_net, int, S_IRUGO | S_IWUSR);