drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define DRIVER_VERSION                  "1.2"
  77 #define MOD_AUTHOR                      "Option Wireless"
  78 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  79 #define MOD_LICENSE                     "GPL"
  80
  81 #define HSO_MAX_NET_DEVICES             10
  82 #define HSO__MAX_MTU                    2048
  83 #define DEFAULT_MTU                     1500
  84 #define DEFAULT_MRU                     1500
  85
  86 #define CTRL_URB_RX_SIZE                1024
  87 #define CTRL_URB_TX_SIZE                64
  88
  89 #define BULK_URB_RX_SIZE                4096
  90 #define BULK_URB_TX_SIZE                8192
  91
  92 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  94 #define MUX_BULK_RX_BUF_COUNT           4
  95 #define USB_TYPE_OPTION_VENDOR          0x20
  96
  97 /* These definitions are used with the struct hso_net flags element */
  98 /* - use *_bit operations on it. (bit indices not values.) */
  99 #define HSO_NET_RUNNING                 0
 100
 101 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 102
 103 #define HSO_SERIAL_MAGIC                0x48534f31
 104
 105 /* Number of ttys to handle */
 106 #define HSO_SERIAL_TTY_MINORS           256
 107
 108 #define MAX_RX_URBS                     2
 109
 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 111 {
 112         if (tty)
 113                 return tty->driver_data;
 114         return NULL;
 115 }
 116
 117 /*****************************************************************************/
 118 /* Debugging functions                                                       */
 119 /*****************************************************************************/
 120 #define D__(lvl_, fmt, arg...)                          \
 121         do {                                            \
 122                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 123                        __LINE__, __func__, ## arg);     \
 124         } while (0)
 125
 126 #define D_(lvl, args...)                                \
 127         do {                                            \
 128                 if (lvl & debug)                        \
 129                         D__(KERN_INFO, args);           \
 130         } while (0)
 131
 132 #define D1(args...)     D_(0x01, ##args)
 133 #define D2(args...)     D_(0x02, ##args)
 134 #define D3(args...)     D_(0x04, ##args)
 135 #define D4(args...)     D_(0x08, ##args)
 136 #define D5(args...)     D_(0x10, ##args)
 137
 138 /*****************************************************************************/
 139 /* Enumerators                                                               */
 140 /*****************************************************************************/
 141 enum pkt_parse_state {
 142         WAIT_IP,
 143         WAIT_DATA,
 144         WAIT_SYNC
 145 };
 146
 147 /*****************************************************************************/
 148 /* Structs                                                                   */
 149 /*****************************************************************************/
 150
 151 struct hso_shared_int {
 152         struct usb_endpoint_descriptor *intr_endp;
 153         void *shared_intr_buf;
 154         struct urb *shared_intr_urb;
 155         struct usb_device *usb;
 156         int use_count;
 157         int ref_count;
 158         struct mutex shared_int_lock;
 159 };
 160
 161 struct hso_net {
 162         struct hso_device *parent;
 163         struct net_device *net;
 164         struct rfkill *rfkill;
 165
 166         struct usb_endpoint_descriptor *in_endp;
 167         struct usb_endpoint_descriptor *out_endp;
 168
 169         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 170         struct urb *mux_bulk_tx_urb;
 171         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 172         void *mux_bulk_tx_buf;
 173
 174         struct sk_buff *skb_rx_buf;
 175         struct sk_buff *skb_tx_buf;
 176
 177         enum pkt_parse_state rx_parse_state;
 178         spinlock_t net_lock;
 179
 180         unsigned short rx_buf_size;
 181         unsigned short rx_buf_missing;
 182         struct iphdr rx_ip_hdr;
 183
 184         unsigned long flags;
 185 };
 186
 187 enum rx_ctrl_state{
 188         RX_IDLE,
 189         RX_SENT,
 190         RX_PENDING
 191 };
 192
 193 #define BM_REQUEST_TYPE (0xa1)
 194 #define B_NOTIFICATION  (0x20)
 195 #define W_VALUE         (0x0)
 196 #define W_INDEX         (0x2)
 197 #define W_LENGTH        (0x2)
 198
 199 #define B_OVERRUN       (0x1<<6)
 200 #define B_PARITY        (0x1<<5)
 201 #define B_FRAMING       (0x1<<4)
 202 #define B_RING_SIGNAL   (0x1<<3)
 203 #define B_BREAK         (0x1<<2)
 204 #define B_TX_CARRIER    (0x1<<1)
 205 #define B_RX_CARRIER    (0x1<<0)
 206
 207 struct hso_serial_state_notification {
 208         u8 bmRequestType;
 209         u8 bNotification;
 210         u16 wValue;
 211         u16 wIndex;
 212         u16 wLength;
 213         u16 UART_state_bitmap;
 214 } __attribute__((packed));
 215
 216 struct hso_tiocmget {
 217         struct mutex mutex;
 218         wait_queue_head_t waitq;
 219         int    intr_completed;
 220         struct usb_endpoint_descriptor *endp;
 221         struct urb *urb;
 222         struct hso_serial_state_notification serial_state_notification;
 223         u16    prev_UART_state_bitmap;
 224         struct uart_icount icount;
 225 };
 226
 227
 228 struct hso_serial {
 229         struct hso_device *parent;
 230         int magic;
 231         u8 minor;
 232
 233         struct hso_shared_int *shared_int;
 234
 235         /* rx/tx urb could be either a bulk urb or a control urb depending
 236            on which serial port it is used on. */
 237         struct urb *rx_urb[MAX_RX_URBS];
 238         u8 num_rx_urbs;
 239         u8 *rx_data[MAX_RX_URBS];
 240         u16 rx_data_length;     /* should contain allocated length */
 241
 242         struct urb *tx_urb;
 243         u8 *tx_data;
 244         u8 *tx_buffer;
 245         u16 tx_data_length;     /* should contain allocated length */
 246         u16 tx_data_count;
 247         u16 tx_buffer_count;
 248         struct usb_ctrlrequest ctrl_req_tx;
 249         struct usb_ctrlrequest ctrl_req_rx;
 250
 251         struct usb_endpoint_descriptor *in_endp;
 252         struct usb_endpoint_descriptor *out_endp;
 253
 254         enum rx_ctrl_state rx_state;
 255         u8 rts_state;
 256         u8 dtr_state;
 257         unsigned tx_urb_used:1;
 258
 259         /* from usb_serial_port */
 260         struct tty_struct *tty;
 261         int open_count;
 262         spinlock_t serial_lock;
 263
 264         int (*write_data) (struct hso_serial *serial);
 265         struct hso_tiocmget  *tiocmget;
 266         /* Hacks required to get flow control
 267          * working on the serial receive buffers
 268          * so as not to drop characters on the floor.
 269          */
 270         int  curr_rx_urb_idx;
 271         u16  curr_rx_urb_offset;
 272         u8   rx_urb_filled[MAX_RX_URBS];
 273         struct tasklet_struct unthrottle_tasklet;
 274         struct work_struct    retry_unthrottle_workqueue;
 275 };
 276
 277 struct hso_device {
 278         union {
 279                 struct hso_serial *dev_serial;
 280                 struct hso_net *dev_net;
 281         } port_data;
 282
 283         u32 port_spec;
 284
 285         u8 is_active;
 286         u8 usb_gone;
 287         struct work_struct async_get_intf;
 288         struct work_struct async_put_intf;
 289
 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 log_usb_status(int status, const char *function);
 336 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 337                                                   int type, int dir);
 338 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 339 static void hso_free_interface(struct usb_interface *intf);
 340 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 341 static int hso_stop_serial_device(struct hso_device *hso_dev);
 342 static int hso_start_net_device(struct hso_device *hso_dev);
 343 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 344 static int hso_stop_net_device(struct hso_device *hso_dev);
 345 static void hso_serial_ref_free(struct kref *ref);
 346 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 347 static int hso_mux_serial_read(struct hso_serial *serial);
 348 static void async_get_intf(struct work_struct *data);
 349 static void async_put_intf(struct work_struct *data);
 350 static int hso_put_activity(struct hso_device *hso_dev);
 351 static int hso_get_activity(struct hso_device *hso_dev);
 352 static void tiocmget_intr_callback(struct urb *urb);
 353 /*****************************************************************************/
 354 /* Helping functions                                                         */
 355 /*****************************************************************************/
 356
 357 /* #define DEBUG */
 358
 359 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 360 {
 361         return hso_dev->port_data.dev_net;
 362 }
 363
 364 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 365 {
 366         return hso_dev->port_data.dev_serial;
 367 }
 368
 369 /* Debugging functions */
 370 #ifdef DEBUG
 371 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 372                      unsigned int len)
 373 {
 374         static char name[255];
 375
 376         sprintf(name, "hso[%d:%s]", line_count, func_name);
 377         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 378 }
 379
 380 #define DUMP(buf_, len_)        \
 381         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 382
 383 #define DUMP1(buf_, len_)                       \
 384         do {                                    \
 385                 if (0x01 & debug)               \
 386                         DUMP(buf_, len_);       \
 387         } while (0)
 388 #else
 389 #define DUMP(buf_, len_)
 390 #define DUMP1(buf_, len_)
 391 #endif
 392
 393 /* module parameters */
 394 static int debug;
 395 static int tty_major;
 396 static int disable_net;
 397
 398 /* driver info */
 399 static const char driver_name[] = "hso";
 400 static const char tty_filename[] = "ttyHS";
 401 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 402 /* the usb driver itself (registered in hso_init) */
 403 static struct usb_driver hso_driver;
 404 /* serial structures */
 405 static struct tty_driver *tty_drv;
 406 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 407 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 408 static spinlock_t serial_table_lock;
 409
 410 static const s32 default_port_spec[] = {
 411         HSO_INTF_MUX | HSO_PORT_NETWORK,
 412         HSO_INTF_BULK | HSO_PORT_DIAG,
 413         HSO_INTF_BULK | HSO_PORT_MODEM,
 414         0
 415 };
 416
 417 static const s32 icon321_port_spec[] = {
 418         HSO_INTF_MUX | HSO_PORT_NETWORK,
 419         HSO_INTF_BULK | HSO_PORT_DIAG2,
 420         HSO_INTF_BULK | HSO_PORT_MODEM,
 421         HSO_INTF_BULK | HSO_PORT_DIAG,
 422         0
 423 };
 424
 425 #define default_port_device(vendor, product)    \
 426         USB_DEVICE(vendor, product),    \
 427                 .driver_info = (kernel_ulong_t)default_port_spec
 428
 429 #define icon321_port_device(vendor, product)    \
 430         USB_DEVICE(vendor, product),    \
 431                 .driver_info = (kernel_ulong_t)icon321_port_spec
 432
 433 /* list of devices we support */
 434 static const struct usb_device_id hso_ids[] = {
 435         {default_port_device(0x0af0, 0x6711)},
 436         {default_port_device(0x0af0, 0x6731)},
 437         {default_port_device(0x0af0, 0x6751)},
 438         {default_port_device(0x0af0, 0x6771)},
 439         {default_port_device(0x0af0, 0x6791)},
 440         {default_port_device(0x0af0, 0x6811)},
 441         {default_port_device(0x0af0, 0x6911)},
 442         {default_port_device(0x0af0, 0x6951)},
 443         {default_port_device(0x0af0, 0x6971)},
 444         {default_port_device(0x0af0, 0x7011)},
 445         {default_port_device(0x0af0, 0x7031)},
 446         {default_port_device(0x0af0, 0x7051)},
 447         {default_port_device(0x0af0, 0x7071)},
 448         {default_port_device(0x0af0, 0x7111)},
 449         {default_port_device(0x0af0, 0x7211)},
 450         {default_port_device(0x0af0, 0x7251)},
 451         {default_port_device(0x0af0, 0x7271)},
 452         {default_port_device(0x0af0, 0x7311)},
 453         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 454         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 455         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 456         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 457         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 458         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 459         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 460         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 461         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 462         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 463         {USB_DEVICE(0x0af0, 0x7701)},
 464         {USB_DEVICE(0x0af0, 0x7706)},
 465         {USB_DEVICE(0x0af0, 0x7801)},
 466         {USB_DEVICE(0x0af0, 0x7901)},
 467         {USB_DEVICE(0x0af0, 0x7A01)},
 468         {USB_DEVICE(0x0af0, 0x7A05)},
 469         {USB_DEVICE(0x0af0, 0x8200)},
 470         {USB_DEVICE(0x0af0, 0x8201)},
 471         {USB_DEVICE(0x0af0, 0x8300)},
 472         {USB_DEVICE(0x0af0, 0x8302)},
 473         {USB_DEVICE(0x0af0, 0x8304)},
 474         {USB_DEVICE(0x0af0, 0x8400)},
 475         {USB_DEVICE(0x0af0, 0xd035)},
 476         {USB_DEVICE(0x0af0, 0xd055)},
 477         {USB_DEVICE(0x0af0, 0xd155)},
 478         {USB_DEVICE(0x0af0, 0xd255)},
 479         {USB_DEVICE(0x0af0, 0xd057)},
 480         {USB_DEVICE(0x0af0, 0xd157)},
 481         {USB_DEVICE(0x0af0, 0xd257)},
 482         {USB_DEVICE(0x0af0, 0xd357)},
 483         {USB_DEVICE(0x0af0, 0xd058)},
 484         {USB_DEVICE(0x0af0, 0xc100)},
 485         {}
 486 };
 487 MODULE_DEVICE_TABLE(usb, hso_ids);
 488
 489 /* Sysfs attribute */
 490 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 491                                        struct device_attribute *attr,
 492                                        char *buf)
 493 {
 494         struct hso_device *hso_dev = dev_get_drvdata(dev);
 495         char *port_name;
 496
 497         if (!hso_dev)
 498                 return 0;
 499
 500         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 501         case HSO_PORT_CONTROL:
 502                 port_name = "Control";
 503                 break;
 504         case HSO_PORT_APP:
 505                 port_name = "Application";
 506                 break;
 507         case HSO_PORT_APP2:
 508                 port_name = "Application2";
 509                 break;
 510         case HSO_PORT_GPS:
 511                 port_name = "GPS";
 512                 break;
 513         case HSO_PORT_GPS_CONTROL:
 514                 port_name = "GPS Control";
 515                 break;
 516         case HSO_PORT_PCSC:
 517                 port_name = "PCSC";
 518                 break;
 519         case HSO_PORT_DIAG:
 520                 port_name = "Diagnostic";
 521                 break;
 522         case HSO_PORT_DIAG2:
 523                 port_name = "Diagnostic2";
 524                 break;
 525         case HSO_PORT_MODEM:
 526                 port_name = "Modem";
 527                 break;
 528         case HSO_PORT_NETWORK:
 529                 port_name = "Network";
 530                 break;
 531         default:
 532                 port_name = "Unknown";
 533                 break;
 534         }
 535
 536         return sprintf(buf, "%s\n", port_name);
 537 }
 538 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 539
 540 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 541 {
 542         int idx;
 543
 544         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 545                 if (serial->rx_urb[idx] == urb)
 546                         return idx;
 547         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 548         return -1;
 549 }
 550
 551 /* converts mux value to a port spec value */
 552 static u32 hso_mux_to_port(int mux)
 553 {
 554         u32 result;
 555
 556         switch (mux) {
 557         case 0x1:
 558                 result = HSO_PORT_CONTROL;
 559                 break;
 560         case 0x2:
 561                 result = HSO_PORT_APP;
 562                 break;
 563         case 0x4:
 564                 result = HSO_PORT_PCSC;
 565                 break;
 566         case 0x8:
 567                 result = HSO_PORT_GPS;
 568                 break;
 569         case 0x10:
 570                 result = HSO_PORT_APP2;
 571                 break;
 572         default:
 573                 result = HSO_PORT_NO_PORT;
 574         }
 575         return result;
 576 }
 577
 578 /* converts port spec value to a mux value */
 579 static u32 hso_port_to_mux(int port)
 580 {
 581         u32 result;
 582
 583         switch (port & HSO_PORT_MASK) {
 584         case HSO_PORT_CONTROL:
 585                 result = 0x0;
 586                 break;
 587         case HSO_PORT_APP:
 588                 result = 0x1;
 589                 break;
 590         case HSO_PORT_PCSC:
 591                 result = 0x2;
 592                 break;
 593         case HSO_PORT_GPS:
 594                 result = 0x3;
 595                 break;
 596         case HSO_PORT_APP2:
 597                 result = 0x4;
 598                 break;
 599         default:
 600                 result = 0x0;
 601         }
 602         return result;
 603 }
 604
 605 static struct hso_serial *get_serial_by_shared_int_and_type(
 606                                         struct hso_shared_int *shared_int,
 607                                         int mux)
 608 {
 609         int i, port;
 610
 611         port = hso_mux_to_port(mux);
 612
 613         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 614                 if (serial_table[i] &&
 615                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 616                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 617                         return dev2ser(serial_table[i]);
 618                 }
 619         }
 620
 621         return NULL;
 622 }
 623
 624 static struct hso_serial *get_serial_by_index(unsigned index)
 625 {
 626         struct hso_serial *serial = NULL;
 627         unsigned long flags;
 628
 629         spin_lock_irqsave(&serial_table_lock, flags);
 630         if (serial_table[index])
 631                 serial = dev2ser(serial_table[index]);
 632         spin_unlock_irqrestore(&serial_table_lock, flags);
 633
 634         return serial;
 635 }
 636
 637 static int get_free_serial_index(void)
 638 {
 639         int index;
 640         unsigned long flags;
 641
 642         spin_lock_irqsave(&serial_table_lock, flags);
 643         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 644                 if (serial_table[index] == NULL) {
 645                         spin_unlock_irqrestore(&serial_table_lock, flags);
 646                         return index;
 647                 }
 648         }
 649         spin_unlock_irqrestore(&serial_table_lock, flags);
 650
 651         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 652         return -1;
 653 }
 654
 655 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 656 {
 657         unsigned long flags;
 658
 659         spin_lock_irqsave(&serial_table_lock, flags);
 660         if (serial)
 661                 serial_table[index] = serial->parent;
 662         else
 663                 serial_table[index] = NULL;
 664         spin_unlock_irqrestore(&serial_table_lock, flags);
 665 }
 666
 667 /* log a meaningful explanation of an USB status */
 668 static void log_usb_status(int status, const char *function)
 669 {
 670         char *explanation;
 671
 672         switch (status) {
 673         case -ENODEV:
 674                 explanation = "no device";
 675                 break;
 676         case -ENOENT:
 677                 explanation = "endpoint not enabled";
 678                 break;
 679         case -EPIPE:
 680                 explanation = "endpoint stalled";
 681                 break;
 682         case -ENOSPC:
 683                 explanation = "not enough bandwidth";
 684                 break;
 685         case -ESHUTDOWN:
 686                 explanation = "device disabled";
 687                 break;
 688         case -EHOSTUNREACH:
 689                 explanation = "device suspended";
 690                 break;
 691         case -EINVAL:
 692         case -EAGAIN:
 693         case -EFBIG:
 694         case -EMSGSIZE:
 695                 explanation = "internal error";
 696                 break;
 697         default:
 698                 explanation = "unknown status";
 699                 break;
 700         }
 701         D1("%s: received USB status - %s (%d)", function, explanation, status);
 702 }
 703
 704 /* Network interface functions */
 705
 706 /* called when net interface is brought up by ifconfig */
 707 static int hso_net_open(struct net_device *net)
 708 {
 709         struct hso_net *odev = netdev_priv(net);
 710         unsigned long flags = 0;
 711
 712         if (!odev) {
 713                 dev_err(&net->dev, "No net device !\n");
 714                 return -ENODEV;
 715         }
 716
 717         odev->skb_tx_buf = NULL;
 718
 719         /* setup environment */
 720         spin_lock_irqsave(&odev->net_lock, flags);
 721         odev->rx_parse_state = WAIT_IP;
 722         odev->rx_buf_size = 0;
 723         odev->rx_buf_missing = sizeof(struct iphdr);
 724         spin_unlock_irqrestore(&odev->net_lock, flags);
 725
 726         /* We are up and running. */
 727         set_bit(HSO_NET_RUNNING, &odev->flags);
 728         hso_start_net_device(odev->parent);
 729
 730         /* Tell the kernel we are ready to start receiving from it */
 731         netif_start_queue(net);
 732
 733         return 0;
 734 }
 735
 736 /* called when interface is brought down by ifconfig */
 737 static int hso_net_close(struct net_device *net)
 738 {
 739         struct hso_net *odev = netdev_priv(net);
 740
 741         /* we don't need the queue anymore */
 742         netif_stop_queue(net);
 743         /* no longer running */
 744         clear_bit(HSO_NET_RUNNING, &odev->flags);
 745
 746         hso_stop_net_device(odev->parent);
 747
 748         /* done */
 749         return 0;
 750 }
 751
 752 /* USB tells is xmit done, we should start the netqueue again */
 753 static void write_bulk_callback(struct urb *urb)
 754 {
 755         struct hso_net *odev = urb->context;
 756         int status = urb->status;
 757
 758         /* Sanity check */
 759         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 760                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 761                 return;
 762         }
 763
 764         /* Do we still have a valid kernel network device? */
 765         if (!netif_device_present(odev->net)) {
 766                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 767                         __func__);
 768                 return;
 769         }
 770
 771         /* log status, but don't act on it, we don't need to resubmit anything
 772          * anyhow */
 773         if (status)
 774                 log_usb_status(status, __func__);
 775
 776         hso_put_activity(odev->parent);
 777
 778         /* Tell the network interface we are ready for another frame */
 779         netif_wake_queue(odev->net);
 780 }
 781
 782 /* called by kernel when we need to transmit a packet */
 783 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 784                                             struct net_device *net)
 785 {
 786         struct hso_net *odev = netdev_priv(net);
 787         int result;
 788
 789         /* Tell the kernel, "No more frames 'til we are done with this one." */
 790         netif_stop_queue(net);
 791         if (hso_get_activity(odev->parent) == -EAGAIN) {
 792                 odev->skb_tx_buf = skb;
 793                 return NETDEV_TX_OK;
 794         }
 795
 796         /* log if asked */
 797         DUMP1(skb->data, skb->len);
 798         /* Copy it from kernel memory to OUR memory */
 799         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 800         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 801
 802         /* Fill in the URB for shipping it out. */
 803         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 804                           odev->parent->usb,
 805                           usb_sndbulkpipe(odev->parent->usb,
 806                                           odev->out_endp->
 807                                           bEndpointAddress & 0x7F),
 808                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 809                           odev);
 810
 811         /* Deal with the Zero Length packet problem, I hope */
 812         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 813
 814         /* Send the URB on its merry way. */
 815         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 816         if (result) {
 817                 dev_warn(&odev->parent->interface->dev,
 818                         "failed mux_bulk_tx_urb %d", result);
 819                 net->stats.tx_errors++;
 820                 netif_start_queue(net);
 821         } else {
 822                 net->stats.tx_packets++;
 823                 net->stats.tx_bytes += skb->len;
 824                 /* And tell the kernel when the last transmit started. */
 825                 net->trans_start = jiffies;
 826         }
 827         dev_kfree_skb(skb);
 828         /* we're done */
 829         return NETDEV_TX_OK;
 830 }
 831
 832 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 833 {
 834         struct hso_net *odev = netdev_priv(net);
 835
 836         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 837         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 838         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 839 }
 840
 841 static const struct ethtool_ops ops = {
 842         .get_drvinfo = hso_get_drvinfo,
 843         .get_link = ethtool_op_get_link
 844 };
 845
 846 /* called when a packet did not ack after watchdogtimeout */
 847 static void hso_net_tx_timeout(struct net_device *net)
 848 {
 849         struct hso_net *odev = netdev_priv(net);
 850
 851         if (!odev)
 852                 return;
 853
 854         /* Tell syslog we are hosed. */
 855         dev_warn(&net->dev, "Tx timed out.\n");
 856
 857         /* Tear the waiting frame off the list */
 858         if (odev->mux_bulk_tx_urb &&
 859             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 860                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 861
 862         /* Update statistics */
 863         net->stats.tx_errors++;
 864 }
 865
 866 /* make a real packet from the received USB buffer */
 867 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 868                         unsigned int count, unsigned char is_eop)
 869 {
 870         unsigned short temp_bytes;
 871         unsigned short buffer_offset = 0;
 872         unsigned short frame_len;
 873         unsigned char *tmp_rx_buf;
 874
 875         /* log if needed */
 876         D1("Rx %d bytes", count);
 877         DUMP(ip_pkt, min(128, (int)count));
 878
 879         while (count) {
 880                 switch (odev->rx_parse_state) {
 881                 case WAIT_IP:
 882                         /* waiting for IP header. */
 883                         /* wanted bytes - size of ip header */
 884                         temp_bytes =
 885                             (count <
 886                              odev->rx_buf_missing) ? count : odev->
 887                             rx_buf_missing;
 888
 889                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 890                                odev->rx_buf_size, ip_pkt + buffer_offset,
 891                                temp_bytes);
 892
 893                         odev->rx_buf_size += temp_bytes;
 894                         buffer_offset += temp_bytes;
 895                         odev->rx_buf_missing -= temp_bytes;
 896                         count -= temp_bytes;
 897
 898                         if (!odev->rx_buf_missing) {
 899                                 /* header is complete allocate an sk_buffer and
 900                                  * continue to WAIT_DATA */
 901                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 902
 903                                 if ((frame_len > DEFAULT_MRU) ||
 904                                     (frame_len < sizeof(struct iphdr))) {
 905                                         dev_err(&odev->net->dev,
 906                                                 "Invalid frame (%d) length\n",
 907                                                 frame_len);
 908                                         odev->rx_parse_state = WAIT_SYNC;
 909                                         continue;
 910                                 }
 911                                 /* Allocate an sk_buff */
 912                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 913                                                                     frame_len);
 914                                 if (!odev->skb_rx_buf) {
 915                                         /* We got no receive buffer. */
 916                                         D1("could not allocate memory");
 917                                         odev->rx_parse_state = WAIT_SYNC;
 918                                         return;
 919                                 }
 920
 921                                 /* Copy what we got so far. make room for iphdr
 922                                  * after tail. */
 923                                 tmp_rx_buf =
 924                                     skb_put(odev->skb_rx_buf,
 925                                             sizeof(struct iphdr));
 926                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 927                                        sizeof(struct iphdr));
 928
 929                                 /* ETH_HLEN */
 930                                 odev->rx_buf_size = sizeof(struct iphdr);
 931
 932                                 /* Filip actually use .tot_len */
 933                                 odev->rx_buf_missing =
 934                                     frame_len - sizeof(struct iphdr);
 935                                 odev->rx_parse_state = WAIT_DATA;
 936                         }
 937                         break;
 938
 939                 case WAIT_DATA:
 940                         temp_bytes = (count < odev->rx_buf_missing)
 941                                         ? count : odev->rx_buf_missing;
 942
 943                         /* Copy the rest of the bytes that are left in the
 944                          * buffer into the waiting sk_buf. */
 945                         /* Make room for temp_bytes after tail. */
 946                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 947                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 948
 949                         odev->rx_buf_missing -= temp_bytes;
 950                         count -= temp_bytes;
 951                         buffer_offset += temp_bytes;
 952                         odev->rx_buf_size += temp_bytes;
 953                         if (!odev->rx_buf_missing) {
 954                                 /* Packet is complete. Inject into stack. */
 955                                 /* We have IP packet here */
 956                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 957                                 /* don't check it */
 958                                 odev->skb_rx_buf->ip_summed =
 959                                         CHECKSUM_UNNECESSARY;
 960
 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 /* Moving data from usb to kernel (in interrupt state) */
1001 static void read_bulk_callback(struct urb *urb)
1002 {
1003         struct hso_net *odev = urb->context;
1004         struct net_device *net;
1005         int result;
1006         int status = urb->status;
1007
1008         /* is al ok?  (Filip: Who's Al ?) */
1009         if (status) {
1010                 log_usb_status(status, __func__);
1011                 return;
1012         }
1013
1014         /* Sanity check */
1015         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1016                 D1("BULK IN callback but driver is not active!");
1017                 return;
1018         }
1019         usb_mark_last_busy(urb->dev);
1020
1021         net = odev->net;
1022
1023         if (!netif_device_present(net)) {
1024                 /* Somebody killed our network interface... */
1025                 return;
1026         }
1027
1028         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1029                 u32 rest;
1030                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1031                 rest = urb->actual_length %
1032                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1033                 if (((rest == 5) || (rest == 6)) &&
1034                     !memcmp(((u8 *) urb->transfer_buffer) +
1035                             urb->actual_length - 4, crc_check, 4)) {
1036                         urb->actual_length -= 4;
1037                 }
1038         }
1039
1040         /* do we even have a packet? */
1041         if (urb->actual_length) {
1042                 /* Handle the IP stream, add header and push it onto network
1043                  * stack if the packet is complete. */
1044                 spin_lock(&odev->net_lock);
1045                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1046                             (urb->transfer_buffer_length >
1047                              urb->actual_length) ? 1 : 0);
1048                 spin_unlock(&odev->net_lock);
1049         }
1050
1051         /* We are done with this URB, resubmit it. Prep the USB to wait for
1052          * another frame. Reuse same as received. */
1053         usb_fill_bulk_urb(urb,
1054                           odev->parent->usb,
1055                           usb_rcvbulkpipe(odev->parent->usb,
1056                                           odev->in_endp->
1057                                           bEndpointAddress & 0x7F),
1058                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1059                           read_bulk_callback, odev);
1060
1061         /* Give this to the USB subsystem so it can tell us when more data
1062          * arrives. */
1063         result = usb_submit_urb(urb, GFP_ATOMIC);
1064         if (result)
1065                 dev_warn(&odev->parent->interface->dev,
1066                          "%s failed submit mux_bulk_rx_urb %d", __func__,
1067                          result);
1068 }
1069
1070 /* Serial driver functions */
1071
1072 static void hso_init_termios(struct ktermios *termios)
1073 {
1074         /*
1075          * The default requirements for this device are:
1076          */
1077         termios->c_iflag &=
1078                 ~(IGNBRK        /* disable ignore break */
1079                 | BRKINT        /* disable break causes interrupt */
1080                 | PARMRK        /* disable mark parity errors */
1081                 | ISTRIP        /* disable clear high bit of input characters */
1082                 | INLCR         /* disable translate NL to CR */
1083                 | IGNCR         /* disable ignore CR */
1084                 | ICRNL         /* disable translate CR to NL */
1085                 | IXON);        /* disable enable XON/XOFF flow control */
1086
1087         /* disable postprocess output characters */
1088         termios->c_oflag &= ~OPOST;
1089
1090         termios->c_lflag &=
1091                 ~(ECHO          /* disable echo input characters */
1092                 | ECHONL        /* disable echo new line */
1093                 | ICANON        /* disable erase, kill, werase, and rprnt
1094                                    special characters */
1095                 | ISIG          /* disable interrupt, quit, and suspend special
1096                                    characters */
1097                 | IEXTEN);      /* disable non-POSIX special characters */
1098
1099         termios->c_cflag &=
1100                 ~(CSIZE         /* no size */
1101                 | PARENB        /* disable parity bit */
1102                 | CBAUD         /* clear current baud rate */
1103                 | CBAUDEX);     /* clear current buad rate */
1104
1105         termios->c_cflag |= CS8;        /* character size 8 bits */
1106
1107         /* baud rate 115200 */
1108         tty_termios_encode_baud_rate(termios, 115200, 115200);
1109 }
1110
1111 static void _hso_serial_set_termios(struct tty_struct *tty,
1112                                     struct ktermios *old)
1113 {
1114         struct hso_serial *serial = get_serial_by_tty(tty);
1115         struct ktermios *termios;
1116
1117         if (!serial) {
1118                 printk(KERN_ERR "%s: no tty structures", __func__);
1119                 return;
1120         }
1121
1122         D4("port %d", serial->minor);
1123
1124         /*
1125          *      Fix up unsupported bits
1126          */
1127         termios = tty->termios;
1128         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1129
1130         termios->c_cflag &=
1131                 ~(CSIZE         /* no size */
1132                 | PARENB        /* disable parity bit */
1133                 | CBAUD         /* clear current baud rate */
1134                 | CBAUDEX);     /* clear current buad rate */
1135
1136         termios->c_cflag |= CS8;        /* character size 8 bits */
1137
1138         /* baud rate 115200 */
1139         tty_encode_baud_rate(tty, 115200, 115200);
1140 }
1141
1142 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1143 {
1144         int result;
1145 #ifdef CONFIG_HSO_AUTOPM
1146         usb_mark_last_busy(urb->dev);
1147 #endif
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                 log_usb_status(status, __func__);
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                         u32 rest;
1235                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1236                         rest =
1237                             urb->actual_length %
1238                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1239                         if (((rest == 5) || (rest == 6)) &&
1240                             !memcmp(((u8 *) urb->transfer_buffer) +
1241                                     urb->actual_length - 4, crc_check, 4)) {
1242                                 urb->actual_length -= 4;
1243                         }
1244                 }
1245                 /* Valid data, handle RX data */
1246                 spin_lock(&serial->serial_lock);
1247                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1248                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1249                 spin_unlock(&serial->serial_lock);
1250         } else if (status == -ENOENT || status == -ECONNRESET) {
1251                 /* Unlinked - check for throttled port. */
1252                 D2("Port %d, successfully unlinked urb", serial->minor);
1253                 spin_lock(&serial->serial_lock);
1254                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1255                 hso_resubmit_rx_bulk_urb(serial, urb);
1256                 spin_unlock(&serial->serial_lock);
1257         } else {
1258                 D2("Port %d, status = %d for read urb", serial->minor, status);
1259                 return;
1260         }
1261 }
1262
1263 /*
1264  * This needs to be a tasklet otherwise we will
1265  * end up recursively calling this function.
1266  */
1267 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1268 {
1269         unsigned long flags;
1270
1271         spin_lock_irqsave(&serial->serial_lock, flags);
1272         if ((serial->parent->port_spec & HSO_INTF_MUX))
1273                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1274         else
1275                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1276         spin_unlock_irqrestore(&serial->serial_lock, flags);
1277 }
1278
1279 static  void hso_unthrottle(struct tty_struct *tty)
1280 {
1281         struct hso_serial *serial = get_serial_by_tty(tty);
1282
1283         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1284 }
1285
1286 static void hso_unthrottle_workfunc(struct work_struct *work)
1287 {
1288         struct hso_serial *serial =
1289             container_of(work, struct hso_serial,
1290                          retry_unthrottle_workqueue);
1291         hso_unthrottle_tasklet(serial);
1292 }
1293
1294 /* open the requested serial port */
1295 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1296 {
1297         struct hso_serial *serial = get_serial_by_index(tty->index);
1298         int result;
1299
1300         /* sanity check */
1301         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1302                 WARN_ON(1);
1303                 tty->driver_data = NULL;
1304                 D1("Failed to open port");
1305                 return -ENODEV;
1306         }
1307
1308         mutex_lock(&serial->parent->mutex);
1309         result = usb_autopm_get_interface(serial->parent->interface);
1310         if (result < 0)
1311                 goto err_out;
1312
1313         D1("Opening %d", serial->minor);
1314         kref_get(&serial->parent->ref);
1315
1316         /* setup */
1317         spin_lock_irq(&serial->serial_lock);
1318         tty->driver_data = serial;
1319         tty_kref_put(serial->tty);
1320         serial->tty = tty_kref_get(tty);
1321         spin_unlock_irq(&serial->serial_lock);
1322
1323         /* check for port already opened, if not set the termios */
1324         serial->open_count++;
1325         if (serial->open_count == 1) {
1326                 tty->low_latency = 1;
1327                 serial->rx_state = RX_IDLE;
1328                 /* Force default termio settings */
1329                 _hso_serial_set_termios(tty, NULL);
1330                 tasklet_init(&serial->unthrottle_tasklet,
1331                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1332                              (unsigned long)serial);
1333                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1334                           hso_unthrottle_workfunc);
1335                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1336                 if (result) {
1337                         hso_stop_serial_device(serial->parent);
1338                         serial->open_count--;
1339                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1340                 }
1341         } else {
1342                 D1("Port was already open");
1343         }
1344
1345         usb_autopm_put_interface(serial->parent->interface);
1346
1347         /* done */
1348         if (result)
1349                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1350 err_out:
1351         mutex_unlock(&serial->parent->mutex);
1352         return result;
1353 }
1354
1355 /* close the requested serial port */
1356 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1357 {
1358         struct hso_serial *serial = tty->driver_data;
1359         u8 usb_gone;
1360
1361         D1("Closing serial port");
1362
1363         /* Open failed, no close cleanup required */
1364         if (serial == NULL)
1365                 return;
1366
1367         mutex_lock(&serial->parent->mutex);
1368         usb_gone = serial->parent->usb_gone;
1369
1370         if (!usb_gone)
1371                 usb_autopm_get_interface(serial->parent->interface);
1372
1373         /* reset the rts and dtr */
1374         /* do the actual close */
1375         serial->open_count--;
1376
1377         if (serial->open_count <= 0) {
1378                 serial->open_count = 0;
1379                 spin_lock_irq(&serial->serial_lock);
1380                 if (serial->tty == tty) {
1381                         serial->tty->driver_data = NULL;
1382                         serial->tty = NULL;
1383                         tty_kref_put(tty);
1384                 }
1385                 spin_unlock_irq(&serial->serial_lock);
1386                 if (!usb_gone)
1387                         hso_stop_serial_device(serial->parent);
1388                 tasklet_kill(&serial->unthrottle_tasklet);
1389                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1390         }
1391
1392         if (!usb_gone)
1393                 usb_autopm_put_interface(serial->parent->interface);
1394
1395         mutex_unlock(&serial->parent->mutex);
1396
1397         kref_put(&serial->parent->ref, hso_serial_ref_free);
1398 }
1399
1400 /* close the requested serial port */
1401 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1402                             int count)
1403 {
1404         struct hso_serial *serial = get_serial_by_tty(tty);
1405         int space, tx_bytes;
1406         unsigned long flags;
1407
1408         /* sanity check */
1409         if (serial == NULL) {
1410                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1411                 return -ENODEV;
1412         }
1413
1414         spin_lock_irqsave(&serial->serial_lock, flags);
1415
1416         space = serial->tx_data_length - serial->tx_buffer_count;
1417         tx_bytes = (count < space) ? count : space;
1418
1419         if (!tx_bytes)
1420                 goto out;
1421
1422         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1423         serial->tx_buffer_count += tx_bytes;
1424
1425 out:
1426         spin_unlock_irqrestore(&serial->serial_lock, flags);
1427
1428         hso_kick_transmit(serial);
1429         /* done */
1430         return tx_bytes;
1431 }
1432
1433 /* how much room is there for writing */
1434 static int hso_serial_write_room(struct tty_struct *tty)
1435 {
1436         struct hso_serial *serial = get_serial_by_tty(tty);
1437         int room;
1438         unsigned long flags;
1439
1440         spin_lock_irqsave(&serial->serial_lock, flags);
1441         room = serial->tx_data_length - serial->tx_buffer_count;
1442         spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444         /* return free room */
1445         return room;
1446 }
1447
1448 /* setup the term */
1449 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1450 {
1451         struct hso_serial *serial = get_serial_by_tty(tty);
1452         unsigned long flags;
1453
1454         if (old)
1455                 D5("Termios called with: cflags new[%d] - old[%d]",
1456                    tty->termios->c_cflag, old->c_cflag);
1457
1458         /* the actual setup */
1459         spin_lock_irqsave(&serial->serial_lock, flags);
1460         if (serial->open_count)
1461                 _hso_serial_set_termios(tty, old);
1462         else
1463                 tty->termios = old;
1464         spin_unlock_irqrestore(&serial->serial_lock, flags);
1465
1466         /* done */
1467         return;
1468 }
1469
1470 /* how many characters in the buffer */
1471 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1472 {
1473         struct hso_serial *serial = get_serial_by_tty(tty);
1474         int chars;
1475         unsigned long flags;
1476
1477         /* sanity check */
1478         if (serial == NULL)
1479                 return 0;
1480
1481         spin_lock_irqsave(&serial->serial_lock, flags);
1482         chars = serial->tx_buffer_count;
1483         spin_unlock_irqrestore(&serial->serial_lock, flags);
1484
1485         return chars;
1486 }
1487 static int tiocmget_submit_urb(struct hso_serial *serial,
1488                                struct hso_tiocmget *tiocmget,
1489                                struct usb_device *usb)
1490 {
1491         int result;
1492
1493         if (serial->parent->usb_gone)
1494                 return -ENODEV;
1495         usb_fill_int_urb(tiocmget->urb, usb,
1496                          usb_rcvintpipe(usb,
1497                                         tiocmget->endp->
1498                                         bEndpointAddress & 0x7F),
1499                          &tiocmget->serial_state_notification,
1500                          sizeof(struct hso_serial_state_notification),
1501                          tiocmget_intr_callback, serial,
1502                          tiocmget->endp->bInterval);
1503         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1504         if (result) {
1505                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1506                          result);
1507         }
1508         return result;
1509
1510 }
1511
1512 static void tiocmget_intr_callback(struct urb *urb)
1513 {
1514         struct hso_serial *serial = urb->context;
1515         struct hso_tiocmget *tiocmget;
1516         int status = urb->status;
1517         u16 UART_state_bitmap, prev_UART_state_bitmap;
1518         struct uart_icount *icount;
1519         struct hso_serial_state_notification *serial_state_notification;
1520         struct usb_device *usb;
1521
1522         /* Sanity checks */
1523         if (!serial)
1524                 return;
1525         if (status) {
1526                 log_usb_status(status, __func__);
1527                 return;
1528         }
1529         tiocmget = serial->tiocmget;
1530         if (!tiocmget)
1531                 return;
1532         usb = serial->parent->usb;
1533         serial_state_notification = &tiocmget->serial_state_notification;
1534         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1535             serial_state_notification->bNotification != B_NOTIFICATION ||
1536             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1537             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1538             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1539                 dev_warn(&usb->dev,
1540                          "hso received invalid serial state notification\n");
1541                 DUMP(serial_state_notification,
1542                      sizeof(struct hso_serial_state_notification));
1543         } else {
1544
1545                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1546                                                 UART_state_bitmap);
1547                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1548                 icount = &tiocmget->icount;
1549                 spin_lock(&serial->serial_lock);
1550                 if ((UART_state_bitmap & B_OVERRUN) !=
1551                    (prev_UART_state_bitmap & B_OVERRUN))
1552                         icount->parity++;
1553                 if ((UART_state_bitmap & B_PARITY) !=
1554                    (prev_UART_state_bitmap & B_PARITY))
1555                         icount->parity++;
1556                 if ((UART_state_bitmap & B_FRAMING) !=
1557                    (prev_UART_state_bitmap & B_FRAMING))
1558                         icount->frame++;
1559                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1560                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1561                         icount->rng++;
1562                 if ((UART_state_bitmap & B_BREAK) !=
1563                    (prev_UART_state_bitmap & B_BREAK))
1564                         icount->brk++;
1565                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1566                    (prev_UART_state_bitmap & B_TX_CARRIER))
1567                         icount->dsr++;
1568                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1569                    (prev_UART_state_bitmap & B_RX_CARRIER))
1570                         icount->dcd++;
1571                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1572                 spin_unlock(&serial->serial_lock);
1573                 tiocmget->intr_completed = 1;
1574                 wake_up_interruptible(&tiocmget->waitq);
1575         }
1576         memset(serial_state_notification, 0,
1577                sizeof(struct hso_serial_state_notification));
1578         tiocmget_submit_urb(serial,
1579                             tiocmget,
1580                             serial->parent->usb);
1581 }
1582
1583 /*
1584  * next few functions largely stolen from drivers/serial/serial_core.c
1585  */
1586 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1587  * - mask passed in arg for lines of interest
1588  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1589  * Caller should use TIOCGICOUNT to see which one it was
1590  */
1591 static int
1592 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1593 {
1594         DECLARE_WAITQUEUE(wait, current);
1595         struct uart_icount cprev, cnow;
1596         struct hso_tiocmget  *tiocmget;
1597         int ret;
1598
1599         tiocmget = serial->tiocmget;
1600         if (!tiocmget)
1601                 return -ENOENT;
1602         /*
1603          * note the counters on entry
1604          */
1605         spin_lock_irq(&serial->serial_lock);
1606         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1607         spin_unlock_irq(&serial->serial_lock);
1608         add_wait_queue(&tiocmget->waitq, &wait);
1609         for (;;) {
1610                 spin_lock_irq(&serial->serial_lock);
1611                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1612                 spin_unlock_irq(&serial->serial_lock);
1613                 set_current_state(TASK_INTERRUPTIBLE);
1614                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1615                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1616                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1617                         ret = 0;
1618                         break;
1619                 }
1620                 schedule();
1621                 /* see if a signal did it */
1622                 if (signal_pending(current)) {
1623                         ret = -ERESTARTSYS;
1624                         break;
1625                 }
1626                 cprev = cnow;
1627         }
1628         current->state = TASK_RUNNING;
1629         remove_wait_queue(&tiocmget->waitq, &wait);
1630
1631         return ret;
1632 }
1633
1634 /*
1635  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1636  * Return: write counters to the user passed counter struct
1637  * NB: both 1->0 and 0->1 transitions are counted except for
1638  *     RI where only 0->1 is counted.
1639  */
1640 static int hso_get_count(struct hso_serial *serial,
1641                           struct serial_icounter_struct __user *icnt)
1642 {
1643         struct serial_icounter_struct icount;
1644         struct uart_icount cnow;
1645         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1646
1647         if (!tiocmget)
1648                  return -ENOENT;
1649         spin_lock_irq(&serial->serial_lock);
1650         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1651         spin_unlock_irq(&serial->serial_lock);
1652
1653         icount.cts         = cnow.cts;
1654         icount.dsr         = cnow.dsr;
1655         icount.rng         = cnow.rng;
1656         icount.dcd         = cnow.dcd;
1657         icount.rx          = cnow.rx;
1658         icount.tx          = cnow.tx;
1659         icount.frame       = cnow.frame;
1660         icount.overrun     = cnow.overrun;
1661         icount.parity      = cnow.parity;
1662         icount.brk         = cnow.brk;
1663         icount.buf_overrun = cnow.buf_overrun;
1664
1665         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1666 }
1667
1668
1669 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1670 {
1671         int retval;
1672         struct hso_serial *serial = get_serial_by_tty(tty);
1673         struct hso_tiocmget  *tiocmget;
1674         u16 UART_state_bitmap;
1675
1676         /* sanity check */
1677         if (!serial) {
1678                 D1("no tty structures");
1679                 return -EINVAL;
1680         }
1681         spin_lock_irq(&serial->serial_lock);
1682         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1683             ((serial->dtr_state) ? TIOCM_DTR : 0);
1684         tiocmget = serial->tiocmget;
1685         if (tiocmget) {
1686
1687                 UART_state_bitmap = le16_to_cpu(
1688                         tiocmget->prev_UART_state_bitmap);
1689                 if (UART_state_bitmap & B_RING_SIGNAL)
1690                         retval |=  TIOCM_RNG;
1691                 if (UART_state_bitmap & B_RX_CARRIER)
1692                         retval |=  TIOCM_CD;
1693                 if (UART_state_bitmap & B_TX_CARRIER)
1694                         retval |=  TIOCM_DSR;
1695         }
1696         spin_unlock_irq(&serial->serial_lock);
1697         return retval;
1698 }
1699
1700 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1701                                unsigned int set, unsigned int clear)
1702 {
1703         int val = 0;
1704         unsigned long flags;
1705         int if_num;
1706         struct hso_serial *serial = get_serial_by_tty(tty);
1707
1708         /* sanity check */
1709         if (!serial) {
1710                 D1("no tty structures");
1711                 return -EINVAL;
1712         }
1713         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1714
1715         spin_lock_irqsave(&serial->serial_lock, flags);
1716         if (set & TIOCM_RTS)
1717                 serial->rts_state = 1;
1718         if (set & TIOCM_DTR)
1719                 serial->dtr_state = 1;
1720
1721         if (clear & TIOCM_RTS)
1722                 serial->rts_state = 0;
1723         if (clear & TIOCM_DTR)
1724                 serial->dtr_state = 0;
1725
1726         if (serial->dtr_state)
1727                 val |= 0x01;
1728         if (serial->rts_state)
1729                 val |= 0x02;
1730
1731         spin_unlock_irqrestore(&serial->serial_lock, flags);
1732
1733         return usb_control_msg(serial->parent->usb,
1734                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1735                                0x21, val, if_num, NULL, 0,
1736                                USB_CTRL_SET_TIMEOUT);
1737 }
1738
1739 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1740                             unsigned int cmd, unsigned long arg)
1741 {
1742         struct hso_serial *serial =  get_serial_by_tty(tty);
1743         void __user *uarg = (void __user *)arg;
1744         int ret = 0;
1745         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1746
1747         if (!serial)
1748                 return -ENODEV;
1749         switch (cmd) {
1750         case TIOCMIWAIT:
1751                 ret = hso_wait_modem_status(serial, arg);
1752                 break;
1753
1754         case TIOCGICOUNT:
1755                 ret = hso_get_count(serial, uarg);
1756                 break;
1757         default:
1758                 ret = -ENOIOCTLCMD;
1759                 break;
1760         }
1761         return ret;
1762 }
1763
1764
1765 /* starts a transmit */
1766 static void hso_kick_transmit(struct hso_serial *serial)
1767 {
1768         u8 *temp;
1769         unsigned long flags;
1770         int res;
1771
1772         spin_lock_irqsave(&serial->serial_lock, flags);
1773         if (!serial->tx_buffer_count)
1774                 goto out;
1775
1776         if (serial->tx_urb_used)
1777                 goto out;
1778
1779         /* Wakeup USB interface if necessary */
1780         if (hso_get_activity(serial->parent) == -EAGAIN)
1781                 goto out;
1782
1783         /* Switch pointers around to avoid memcpy */
1784         temp = serial->tx_buffer;
1785         serial->tx_buffer = serial->tx_data;
1786         serial->tx_data = temp;
1787         serial->tx_data_count = serial->tx_buffer_count;
1788         serial->tx_buffer_count = 0;
1789
1790         /* If temp is set, it means we switched buffers */
1791         if (temp && serial->write_data) {
1792                 res = serial->write_data(serial);
1793                 if (res >= 0)
1794                         serial->tx_urb_used = 1;
1795         }
1796 out:
1797         spin_unlock_irqrestore(&serial->serial_lock, flags);
1798 }
1799
1800 /* make a request (for reading and writing data to muxed serial port) */
1801 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1802                               struct urb *ctrl_urb,
1803                               struct usb_ctrlrequest *ctrl_req,
1804                               u8 *ctrl_urb_data, u32 size)
1805 {
1806         int result;
1807         int pipe;
1808
1809         /* Sanity check */
1810         if (!serial || !ctrl_urb || !ctrl_req) {
1811                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1812                 return -EINVAL;
1813         }
1814
1815         /* initialize */
1816         ctrl_req->wValue = 0;
1817         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1818         ctrl_req->wLength = cpu_to_le16(size);
1819
1820         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1821                 /* Reading command */
1822                 ctrl_req->bRequestType = USB_DIR_IN |
1823                                          USB_TYPE_OPTION_VENDOR |
1824                                          USB_RECIP_INTERFACE;
1825                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1826                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1827         } else {
1828                 /* Writing command */
1829                 ctrl_req->bRequestType = USB_DIR_OUT |
1830                                          USB_TYPE_OPTION_VENDOR |
1831                                          USB_RECIP_INTERFACE;
1832                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1833                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1834         }
1835         /* syslog */
1836         D2("%s command (%02x) len: %d, port: %d",
1837            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1838            ctrl_req->bRequestType, ctrl_req->wLength, port);
1839
1840         /* Load ctrl urb */
1841         ctrl_urb->transfer_flags = 0;
1842         usb_fill_control_urb(ctrl_urb,
1843                              serial->parent->usb,
1844                              pipe,
1845                              (u8 *) ctrl_req,
1846                              ctrl_urb_data, size, ctrl_callback, serial);
1847         /* Send it on merry way */
1848         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1849         if (result) {
1850                 dev_err(&ctrl_urb->dev->dev,
1851                         "%s failed submit ctrl_urb %d type %d", __func__,
1852                         result, type);
1853                 return result;
1854         }
1855
1856         /* done */
1857         return size;
1858 }
1859
1860 /* called by intr_callback when read occurs */
1861 static int hso_mux_serial_read(struct hso_serial *serial)
1862 {
1863         if (!serial)
1864                 return -EINVAL;
1865
1866         /* clean data */
1867         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1868         /* make the request */
1869
1870         if (serial->num_rx_urbs != 1) {
1871                 dev_err(&serial->parent->interface->dev,
1872                         "ERROR: mux'd reads with multiple buffers "
1873                         "not possible\n");
1874                 return 0;
1875         }
1876         return mux_device_request(serial,
1877                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1878                                   serial->parent->port_spec & HSO_PORT_MASK,
1879                                   serial->rx_urb[0],
1880                                   &serial->ctrl_req_rx,
1881                                   serial->rx_data[0], serial->rx_data_length);
1882 }
1883
1884 /* used for muxed serial port callback (muxed serial read) */
1885 static void intr_callback(struct urb *urb)
1886 {
1887         struct hso_shared_int *shared_int = urb->context;
1888         struct hso_serial *serial;
1889         unsigned char *port_req;
1890         int status = urb->status;
1891         int i;
1892
1893         usb_mark_last_busy(urb->dev);
1894
1895         /* sanity check */
1896         if (!shared_int)
1897                 return;
1898
1899         /* status check */
1900         if (status) {
1901                 log_usb_status(status, __func__);
1902                 return;
1903         }
1904         D4("\n--- Got intr callback 0x%02X ---", status);
1905
1906         /* what request? */
1907         port_req = urb->transfer_buffer;
1908         D4(" port_req = 0x%.2X\n", *port_req);
1909         /* loop over all muxed ports to find the one sending this */
1910         for (i = 0; i < 8; i++) {
1911                 /* max 8 channels on MUX */
1912                 if (*port_req & (1 << i)) {
1913                         serial = get_serial_by_shared_int_and_type(shared_int,
1914                                                                    (1 << i));
1915                         if (serial != NULL) {
1916                                 D1("Pending read interrupt on port %d\n", i);
1917                                 spin_lock(&serial->serial_lock);
1918                                 if (serial->rx_state == RX_IDLE) {
1919                                         /* Setup and send a ctrl req read on
1920                                          * port i */
1921                                 if (!serial->rx_urb_filled[0]) {
1922                                                 serial->rx_state = RX_SENT;
1923                                                 hso_mux_serial_read(serial);
1924                                         } else
1925                                                 serial->rx_state = RX_PENDING;
1926
1927                                 } else {
1928                                         D1("Already pending a read on "
1929                                            "port %d\n", i);
1930                                 }
1931                                 spin_unlock(&serial->serial_lock);
1932                         }
1933                 }
1934         }
1935         /* Resubmit interrupt urb */
1936         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1937 }
1938
1939 /* called for writing to muxed serial port */
1940 static int hso_mux_serial_write_data(struct hso_serial *serial)
1941 {
1942         if (NULL == serial)
1943                 return -EINVAL;
1944
1945         return mux_device_request(serial,
1946                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1947                                   serial->parent->port_spec & HSO_PORT_MASK,
1948                                   serial->tx_urb,
1949                                   &serial->ctrl_req_tx,
1950                                   serial->tx_data, serial->tx_data_count);
1951 }
1952
1953 /* write callback for Diag and CS port */
1954 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1955 {
1956         struct hso_serial *serial = urb->context;
1957         int status = urb->status;
1958         struct tty_struct *tty;
1959
1960         /* sanity check */
1961         if (!serial) {
1962                 D1("serial == NULL");
1963                 return;
1964         }
1965
1966         spin_lock(&serial->serial_lock);
1967         serial->tx_urb_used = 0;
1968         tty = tty_kref_get(serial->tty);
1969         spin_unlock(&serial->serial_lock);
1970         if (status) {
1971                 log_usb_status(status, __func__);
1972                 tty_kref_put(tty);
1973                 return;
1974         }
1975         hso_put_activity(serial->parent);
1976         if (tty) {
1977                 tty_wakeup(tty);
1978                 tty_kref_put(tty);
1979         }
1980         hso_kick_transmit(serial);
1981
1982         D1(" ");
1983         return;
1984 }
1985
1986 /* called for writing diag or CS serial port */
1987 static int hso_std_serial_write_data(struct hso_serial *serial)
1988 {
1989         int count = serial->tx_data_count;
1990         int result;
1991
1992         usb_fill_bulk_urb(serial->tx_urb,
1993                           serial->parent->usb,
1994                           usb_sndbulkpipe(serial->parent->usb,
1995                                           serial->out_endp->
1996                                           bEndpointAddress & 0x7F),
1997                           serial->tx_data, serial->tx_data_count,
1998                           hso_std_serial_write_bulk_callback, serial);
1999
2000         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2001         if (result) {
2002                 dev_warn(&serial->parent->usb->dev,
2003                          "Failed to submit urb - res %d\n", result);
2004                 return result;
2005         }
2006
2007         return count;
2008 }
2009
2010 /* callback after read or write on muxed serial port */
2011 static void ctrl_callback(struct urb *urb)
2012 {
2013         struct hso_serial *serial = urb->context;
2014         struct usb_ctrlrequest *req;
2015         int status = urb->status;
2016         struct tty_struct *tty;
2017
2018         /* sanity check */
2019         if (!serial)
2020                 return;
2021
2022         spin_lock(&serial->serial_lock);
2023         serial->tx_urb_used = 0;
2024         tty = tty_kref_get(serial->tty);
2025         spin_unlock(&serial->serial_lock);
2026         if (status) {
2027                 log_usb_status(status, __func__);
2028                 tty_kref_put(tty);
2029                 return;
2030         }
2031
2032         /* what request? */
2033         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2034         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2035         D4("Actual length of urb = %d\n", urb->actual_length);
2036         DUMP1(urb->transfer_buffer, urb->actual_length);
2037
2038         if (req->bRequestType ==
2039             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2040                 /* response to a read command */
2041                 serial->rx_urb_filled[0] = 1;
2042                 spin_lock(&serial->serial_lock);
2043                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2044                 spin_unlock(&serial->serial_lock);
2045         } else {
2046                 hso_put_activity(serial->parent);
2047                 if (tty)
2048                         tty_wakeup(tty);
2049                 /* response to a write command */
2050                 hso_kick_transmit(serial);
2051         }
2052         tty_kref_put(tty);
2053 }
2054
2055 /* handle RX data for serial port */
2056 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2057 {
2058         struct tty_struct *tty;
2059         int write_length_remaining = 0;
2060         int curr_write_len;
2061
2062         /* Sanity check */
2063         if (urb == NULL || serial == NULL) {
2064                 D1("serial = NULL");
2065                 return -2;
2066         }
2067
2068         /* All callers to put_rxbuf_data hold serial_lock */
2069         tty = tty_kref_get(serial->tty);
2070
2071         /* Push data to tty */
2072         if (tty) {
2073                 write_length_remaining = urb->actual_length -
2074                         serial->curr_rx_urb_offset;
2075                 D1("data to push to tty");
2076                 while (write_length_remaining) {
2077                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2078                                 tty_kref_put(tty);
2079                                 return -1;
2080                         }
2081                         curr_write_len =  tty_insert_flip_string
2082                                 (tty, urb->transfer_buffer +
2083                                  serial->curr_rx_urb_offset,
2084                                  write_length_remaining);
2085                         serial->curr_rx_urb_offset += curr_write_len;
2086                         write_length_remaining -= curr_write_len;
2087                         tty_flip_buffer_push(tty);
2088                 }
2089         }
2090         if (write_length_remaining == 0) {
2091                 serial->curr_rx_urb_offset = 0;
2092                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2093         }
2094         tty_kref_put(tty);
2095         return write_length_remaining;
2096 }
2097
2098
2099 /* Base driver functions */
2100
2101 static void hso_log_port(struct hso_device *hso_dev)
2102 {
2103         char *port_type;
2104         char port_dev[20];
2105
2106         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2107         case HSO_PORT_CONTROL:
2108                 port_type = "Control";
2109                 break;
2110         case HSO_PORT_APP:
2111                 port_type = "Application";
2112                 break;
2113         case HSO_PORT_GPS:
2114                 port_type = "GPS";
2115                 break;
2116         case HSO_PORT_GPS_CONTROL:
2117                 port_type = "GPS control";
2118                 break;
2119         case HSO_PORT_APP2:
2120                 port_type = "Application2";
2121                 break;
2122         case HSO_PORT_PCSC:
2123                 port_type = "PCSC";
2124                 break;
2125         case HSO_PORT_DIAG:
2126                 port_type = "Diagnostic";
2127                 break;
2128         case HSO_PORT_DIAG2:
2129                 port_type = "Diagnostic2";
2130                 break;
2131         case HSO_PORT_MODEM:
2132                 port_type = "Modem";
2133                 break;
2134         case HSO_PORT_NETWORK:
2135                 port_type = "Network";
2136                 break;
2137         default:
2138                 port_type = "Unknown";
2139                 break;
2140         }
2141         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2142                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2143         } else
2144                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2145                         dev2ser(hso_dev)->minor);
2146
2147         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2148                 port_type, port_dev);
2149 }
2150
2151 static int hso_start_net_device(struct hso_device *hso_dev)
2152 {
2153         int i, result = 0;
2154         struct hso_net *hso_net = dev2net(hso_dev);
2155
2156         if (!hso_net)
2157                 return -ENODEV;
2158
2159         /* send URBs for all read buffers */
2160         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2161
2162                 /* Prep a receive URB */
2163                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2164                                   hso_dev->usb,
2165                                   usb_rcvbulkpipe(hso_dev->usb,
2166                                                   hso_net->in_endp->
2167                                                   bEndpointAddress & 0x7F),
2168                                   hso_net->mux_bulk_rx_buf_pool[i],
2169                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2170                                   hso_net);
2171
2172                 /* Put it out there so the device can send us stuff */
2173                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2174                                         GFP_NOIO);
2175                 if (result)
2176                         dev_warn(&hso_dev->usb->dev,
2177                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2178                                 i, result);
2179         }
2180
2181         return result;
2182 }
2183
2184 static int hso_stop_net_device(struct hso_device *hso_dev)
2185 {
2186         int i;
2187         struct hso_net *hso_net = dev2net(hso_dev);
2188
2189         if (!hso_net)
2190                 return -ENODEV;
2191
2192         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2193                 if (hso_net->mux_bulk_rx_urb_pool[i])
2194                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2195
2196         }
2197         if (hso_net->mux_bulk_tx_urb)
2198                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2199
2200         return 0;
2201 }
2202
2203 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2204 {
2205         int i, result = 0;
2206         struct hso_serial *serial = dev2ser(hso_dev);
2207
2208         if (!serial)
2209                 return -ENODEV;
2210
2211         /* If it is not the MUX port fill in and submit a bulk urb (already
2212          * allocated in hso_serial_start) */
2213         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2214                 for (i = 0; i < serial->num_rx_urbs; i++) {
2215                         usb_fill_bulk_urb(serial->rx_urb[i],
2216                                           serial->parent->usb,
2217                                           usb_rcvbulkpipe(serial->parent->usb,
2218                                                           serial->in_endp->
2219                                                           bEndpointAddress &
2220                                                           0x7F),
2221                                           serial->rx_data[i],
2222                                           serial->rx_data_length,
2223                                           hso_std_serial_read_bulk_callback,
2224                                           serial);
2225                         result = usb_submit_urb(serial->rx_urb[i], flags);
2226                         if (result) {
2227                                 dev_warn(&serial->parent->usb->dev,
2228                                          "Failed to submit urb - res %d\n",
2229                                          result);
2230                                 break;
2231                         }
2232                 }
2233         } else {
2234                 mutex_lock(&serial->shared_int->shared_int_lock);
2235                 if (!serial->shared_int->use_count) {
2236                         result =
2237                             hso_mux_submit_intr_urb(serial->shared_int,
2238                                                     hso_dev->usb, flags);
2239                 }
2240                 serial->shared_int->use_count++;
2241                 mutex_unlock(&serial->shared_int->shared_int_lock);
2242         }
2243         if (serial->tiocmget)
2244                 tiocmget_submit_urb(serial,
2245                                     serial->tiocmget,
2246                                     serial->parent->usb);
2247         return result;
2248 }
2249
2250 static int hso_stop_serial_device(struct hso_device *hso_dev)
2251 {
2252         int i;
2253         struct hso_serial *serial = dev2ser(hso_dev);
2254         struct hso_tiocmget  *tiocmget;
2255
2256         if (!serial)
2257                 return -ENODEV;
2258
2259         for (i = 0; i < serial->num_rx_urbs; i++) {
2260                 if (serial->rx_urb[i]) {
2261                                 usb_kill_urb(serial->rx_urb[i]);
2262                                 serial->rx_urb_filled[i] = 0;
2263                 }
2264         }
2265         serial->curr_rx_urb_idx = 0;
2266         serial->curr_rx_urb_offset = 0;
2267
2268         if (serial->tx_urb)
2269                 usb_kill_urb(serial->tx_urb);
2270
2271         if (serial->shared_int) {
2272                 mutex_lock(&serial->shared_int->shared_int_lock);
2273                 if (serial->shared_int->use_count &&
2274                     (--serial->shared_int->use_count == 0)) {
2275                         struct urb *urb;
2276
2277                         urb = serial->shared_int->shared_intr_urb;
2278                         if (urb)
2279                                 usb_kill_urb(urb);
2280                 }
2281                 mutex_unlock(&serial->shared_int->shared_int_lock);
2282         }
2283         tiocmget = serial->tiocmget;
2284         if (tiocmget) {
2285                 wake_up_interruptible(&tiocmget->waitq);
2286                 usb_kill_urb(tiocmget->urb);
2287         }
2288
2289         return 0;
2290 }
2291
2292 static void hso_serial_common_free(struct hso_serial *serial)
2293 {
2294         int i;
2295
2296         if (serial->parent->dev)
2297                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2298
2299         tty_unregister_device(tty_drv, serial->minor);
2300
2301         for (i = 0; i < serial->num_rx_urbs; i++) {
2302                 /* unlink and free RX URB */
2303                 usb_free_urb(serial->rx_urb[i]);
2304                 /* free the RX buffer */
2305                 kfree(serial->rx_data[i]);
2306         }
2307
2308         /* unlink and free TX URB */
2309         usb_free_urb(serial->tx_urb);
2310         kfree(serial->tx_data);
2311 }
2312
2313 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2314                                     int rx_size, int tx_size)
2315 {
2316         struct device *dev;
2317         int minor;
2318         int i;
2319
2320         minor = get_free_serial_index();
2321         if (minor < 0)
2322                 goto exit;
2323
2324         /* register our minor number */
2325         serial->parent->dev = tty_register_device(tty_drv, minor,
2326                                         &serial->parent->interface->dev);
2327         dev = serial->parent->dev;
2328         dev_set_drvdata(dev, serial->parent);
2329         i = device_create_file(dev, &dev_attr_hsotype);
2330
2331         /* fill in specific data for later use */
2332         serial->minor = minor;
2333         serial->magic = HSO_SERIAL_MAGIC;
2334         spin_lock_init(&serial->serial_lock);
2335         serial->num_rx_urbs = num_urbs;
2336
2337         /* RX, allocate urb and initialize */
2338
2339         /* prepare our RX buffer */
2340         serial->rx_data_length = rx_size;
2341         for (i = 0; i < serial->num_rx_urbs; i++) {
2342                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2343                 if (!serial->rx_urb[i]) {
2344                         dev_err(dev, "Could not allocate urb?\n");
2345                         goto exit;
2346                 }
2347                 serial->rx_urb[i]->transfer_buffer = NULL;
2348                 serial->rx_urb[i]->transfer_buffer_length = 0;
2349                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2350                                              GFP_KERNEL);
2351                 if (!serial->rx_data[i]) {
2352                         dev_err(dev, "%s - Out of memory\n", __func__);
2353                         goto exit;
2354                 }
2355         }
2356
2357         /* TX, allocate urb and initialize */
2358         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2359         if (!serial->tx_urb) {
2360                 dev_err(dev, "Could not allocate urb?\n");
2361                 goto exit;
2362         }
2363         serial->tx_urb->transfer_buffer = NULL;
2364         serial->tx_urb->transfer_buffer_length = 0;
2365         /* prepare our TX buffer */
2366         serial->tx_data_count = 0;
2367         serial->tx_buffer_count = 0;
2368         serial->tx_data_length = tx_size;
2369         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2370         if (!serial->tx_data) {
2371                 dev_err(dev, "%s - Out of memory", __func__);
2372                 goto exit;
2373         }
2374         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2375         if (!serial->tx_buffer) {
2376                 dev_err(dev, "%s - Out of memory", __func__);
2377                 goto exit;
2378         }
2379
2380         return 0;
2381 exit:
2382         hso_serial_common_free(serial);
2383         return -1;
2384 }
2385
2386 /* Creates a general hso device */
2387 static struct hso_device *hso_create_device(struct usb_interface *intf,
2388                                             int port_spec)
2389 {
2390         struct hso_device *hso_dev;
2391
2392         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2393         if (!hso_dev)
2394                 return NULL;
2395
2396         hso_dev->port_spec = port_spec;
2397         hso_dev->usb = interface_to_usbdev(intf);
2398         hso_dev->interface = intf;
2399         kref_init(&hso_dev->ref);
2400         mutex_init(&hso_dev->mutex);
2401
2402         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2403         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2404
2405         return hso_dev;
2406 }
2407
2408 /* Removes a network device in the network device table */
2409 static int remove_net_device(struct hso_device *hso_dev)
2410 {
2411         int i;
2412
2413         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2414                 if (network_table[i] == hso_dev) {
2415                         network_table[i] = NULL;
2416                         break;
2417                 }
2418         }
2419         if (i == HSO_MAX_NET_DEVICES)
2420                 return -1;
2421         return 0;
2422 }
2423
2424 /* Frees our network device */
2425 static void hso_free_net_device(struct hso_device *hso_dev)
2426 {
2427         int i;
2428         struct hso_net *hso_net = dev2net(hso_dev);
2429
2430         if (!hso_net)
2431                 return;
2432
2433         remove_net_device(hso_net->parent);
2434
2435         if (hso_net->net) {
2436                 unregister_netdev(hso_net->net);
2437                 free_netdev(hso_net->net);
2438         }
2439
2440         /* start freeing */
2441         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2442                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2443                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2444                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2445         }
2446         usb_free_urb(hso_net->mux_bulk_tx_urb);
2447         kfree(hso_net->mux_bulk_tx_buf);
2448         hso_net->mux_bulk_tx_buf = NULL;
2449
2450         kfree(hso_dev);
2451 }
2452
2453 static const struct net_device_ops hso_netdev_ops = {
2454         .ndo_open       = hso_net_open,
2455         .ndo_stop       = hso_net_close,
2456         .ndo_start_xmit = hso_net_start_xmit,
2457         .ndo_tx_timeout = hso_net_tx_timeout,
2458 };
2459
2460 /* initialize the network interface */
2461 static void hso_net_init(struct net_device *net)
2462 {
2463         struct hso_net *hso_net = netdev_priv(net);
2464
2465         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2466
2467         /* fill in the other fields */
2468         net->netdev_ops = &hso_netdev_ops;
2469         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2470         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2471         net->type = ARPHRD_NONE;
2472         net->mtu = DEFAULT_MTU - 14;
2473         net->tx_queue_len = 10;
2474         SET_ETHTOOL_OPS(net, &ops);
2475
2476         /* and initialize the semaphore */
2477         spin_lock_init(&hso_net->net_lock);
2478 }
2479
2480 /* Adds a network device in the network device table */
2481 static int add_net_device(struct hso_device *hso_dev)
2482 {
2483         int i;
2484
2485         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2486                 if (network_table[i] == NULL) {
2487                         network_table[i] = hso_dev;
2488                         break;
2489                 }
2490         }
2491         if (i == HSO_MAX_NET_DEVICES)
2492                 return -1;
2493         return 0;
2494 }
2495
2496 static int hso_rfkill_set_block(void *data, bool blocked)
2497 {
2498         struct hso_device *hso_dev = data;
2499         int enabled = !blocked;
2500         int rv;
2501
2502         mutex_lock(&hso_dev->mutex);
2503         if (hso_dev->usb_gone)
2504                 rv = 0;
2505         else
2506                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2507                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2508                                        USB_CTRL_SET_TIMEOUT);
2509         mutex_unlock(&hso_dev->mutex);
2510         return rv;
2511 }
2512
2513 static const struct rfkill_ops hso_rfkill_ops = {
2514         .set_block = hso_rfkill_set_block,
2515 };
2516
2517 /* Creates and sets up everything for rfkill */
2518 static void hso_create_rfkill(struct hso_device *hso_dev,
2519                              struct usb_interface *interface)
2520 {
2521         struct hso_net *hso_net = dev2net(hso_dev);
2522         struct device *dev = &hso_net->net->dev;
2523         char *rfkn;
2524
2525         rfkn = kzalloc(20, GFP_KERNEL);
2526         if (!rfkn)
2527                 dev_err(dev, "%s - Out of memory\n", __func__);
2528
2529         snprintf(rfkn, 20, "hso-%d",
2530                  interface->altsetting->desc.bInterfaceNumber);
2531
2532         hso_net->rfkill = rfkill_alloc(rfkn,
2533                                        &interface_to_usbdev(interface)->dev,
2534                                        RFKILL_TYPE_WWAN,
2535                                        &hso_rfkill_ops, hso_dev);
2536         if (!hso_net->rfkill) {
2537                 dev_err(dev, "%s - Out of memory\n", __func__);
2538                 kfree(rfkn);
2539                 return;
2540         }
2541         if (rfkill_register(hso_net->rfkill) < 0) {
2542                 rfkill_destroy(hso_net->rfkill);
2543                 kfree(rfkn);
2544                 hso_net->rfkill = NULL;
2545                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2546                 return;
2547         }
2548 }
2549
2550 static struct device_type hso_type = {
2551         .name   = "wwan",
2552 };
2553
2554 /* Creates our network device */
2555 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2556                                                 int port_spec)
2557 {
2558         int result, i;
2559         struct net_device *net;
2560         struct hso_net *hso_net;
2561         struct hso_device *hso_dev;
2562
2563         hso_dev = hso_create_device(interface, port_spec);
2564         if (!hso_dev)
2565                 return NULL;
2566
2567         /* allocate our network device, then we can put in our private data */
2568         /* call hso_net_init to do the basic initialization */
2569         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2570         if (!net) {
2571                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2572                 goto exit;
2573         }
2574
2575         hso_net = netdev_priv(net);
2576
2577         hso_dev->port_data.dev_net = hso_net;
2578         hso_net->net = net;
2579         hso_net->parent = hso_dev;
2580
2581         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2582                                       USB_DIR_IN);
2583         if (!hso_net->in_endp) {
2584                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2585                 goto exit;
2586         }
2587         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2588                                        USB_DIR_OUT);
2589         if (!hso_net->out_endp) {
2590                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2591                 goto exit;
2592         }
2593         SET_NETDEV_DEV(net, &interface->dev);
2594         SET_NETDEV_DEVTYPE(net, &hso_type);
2595
2596         /* registering our net device */
2597         result = register_netdev(net);
2598         if (result) {
2599                 dev_err(&interface->dev, "Failed to register device\n");
2600                 goto exit;
2601         }
2602
2603         /* start allocating */
2604         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2605                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2606                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2607                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2608                         goto exit;
2609                 }
2610                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2611                                                            GFP_KERNEL);
2612                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2613                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2614                         goto exit;
2615                 }
2616         }
2617         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2618         if (!hso_net->mux_bulk_tx_urb) {
2619                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2620                 goto exit;
2621         }
2622         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2623         if (!hso_net->mux_bulk_tx_buf) {
2624                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2625                 goto exit;
2626         }
2627
2628         add_net_device(hso_dev);
2629
2630         hso_log_port(hso_dev);
2631
2632         hso_create_rfkill(hso_dev, interface);
2633
2634         return hso_dev;
2635 exit:
2636         hso_free_net_device(hso_dev);
2637         return NULL;
2638 }
2639
2640 static void hso_free_tiomget(struct hso_serial *serial)
2641 {
2642         struct hso_tiocmget *tiocmget = serial->tiocmget;
2643         if (tiocmget) {
2644                 if (tiocmget->urb) {
2645                         usb_free_urb(tiocmget->urb);
2646                         tiocmget->urb = NULL;
2647                 }
2648                 serial->tiocmget = NULL;
2649                 kfree(tiocmget);
2650
2651         }
2652 }
2653
2654 /* Frees an AT channel ( goes for both mux and non-mux ) */
2655 static void hso_free_serial_device(struct hso_device *hso_dev)
2656 {
2657         struct hso_serial *serial = dev2ser(hso_dev);
2658
2659         if (!serial)
2660                 return;
2661         set_serial_by_index(serial->minor, NULL);
2662
2663         hso_serial_common_free(serial);
2664
2665         if (serial->shared_int) {
2666                 mutex_lock(&serial->shared_int->shared_int_lock);
2667                 if (--serial->shared_int->ref_count == 0)
2668                         hso_free_shared_int(serial->shared_int);
2669                 else
2670                         mutex_unlock(&serial->shared_int->shared_int_lock);
2671         }
2672         hso_free_tiomget(serial);
2673         kfree(serial);
2674         kfree(hso_dev);
2675 }
2676
2677 /* Creates a bulk AT channel */
2678 static struct hso_device *hso_create_bulk_serial_device(
2679                         struct usb_interface *interface, int port)
2680 {
2681         struct hso_device *hso_dev;
2682         struct hso_serial *serial;
2683         int num_urbs;
2684         struct hso_tiocmget *tiocmget;
2685
2686         hso_dev = hso_create_device(interface, port);
2687         if (!hso_dev)
2688                 return NULL;
2689
2690         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2691         if (!serial)
2692                 goto exit;
2693
2694         serial->parent = hso_dev;
2695         hso_dev->port_data.dev_serial = serial;
2696
2697         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2698                 num_urbs = 2;
2699                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2700                                            GFP_KERNEL);
2701                 /* it isn't going to break our heart if serial->tiocmget
2702                  *  allocation fails don't bother checking this.
2703                  */
2704                 if (serial->tiocmget) {
2705                         tiocmget = serial->tiocmget;
2706                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2707                         if (tiocmget->urb) {
2708                                 mutex_init(&tiocmget->mutex);
2709                                 init_waitqueue_head(&tiocmget->waitq);
2710                                 tiocmget->endp = hso_get_ep(
2711                                         interface,
2712                                         USB_ENDPOINT_XFER_INT,
2713                                         USB_DIR_IN);
2714                         } else
2715                                 hso_free_tiomget(serial);
2716                 }
2717         }
2718         else
2719                 num_urbs = 1;
2720
2721         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2722                                      BULK_URB_TX_SIZE))
2723                 goto exit;
2724
2725         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2726                                      USB_DIR_IN);
2727         if (!serial->in_endp) {
2728                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2729                 goto exit2;
2730         }
2731
2732         if (!
2733             (serial->out_endp =
2734              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2735                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2736                 goto exit2;
2737         }
2738
2739         serial->write_data = hso_std_serial_write_data;
2740
2741         /* and record this serial */
2742         set_serial_by_index(serial->minor, serial);
2743
2744         /* setup the proc dirs and files if needed */
2745         hso_log_port(hso_dev);
2746
2747         /* done, return it */
2748         return hso_dev;
2749
2750 exit2:
2751         hso_serial_common_free(serial);
2752 exit:
2753         hso_free_tiomget(serial);
2754         kfree(serial);
2755         kfree(hso_dev);
2756         return NULL;
2757 }
2758
2759 /* Creates a multiplexed AT channel */
2760 static
2761 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2762                                                 int port,
2763                                                 struct hso_shared_int *mux)
2764 {
2765         struct hso_device *hso_dev;
2766         struct hso_serial *serial;
2767         int port_spec;
2768
2769         port_spec = HSO_INTF_MUX;
2770         port_spec &= ~HSO_PORT_MASK;
2771
2772         port_spec |= hso_mux_to_port(port);
2773         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2774                 return NULL;
2775
2776         hso_dev = hso_create_device(interface, port_spec);
2777         if (!hso_dev)
2778                 return NULL;
2779
2780         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2781         if (!serial)
2782                 goto exit;
2783
2784         hso_dev->port_data.dev_serial = serial;
2785         serial->parent = hso_dev;
2786
2787         if (hso_serial_common_create
2788             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2789                 goto exit;
2790
2791         serial->tx_data_length--;
2792         serial->write_data = hso_mux_serial_write_data;
2793
2794         serial->shared_int = mux;
2795         mutex_lock(&serial->shared_int->shared_int_lock);
2796         serial->shared_int->ref_count++;
2797         mutex_unlock(&serial->shared_int->shared_int_lock);
2798
2799         /* and record this serial */
2800         set_serial_by_index(serial->minor, serial);
2801
2802         /* setup the proc dirs and files if needed */
2803         hso_log_port(hso_dev);
2804
2805         /* done, return it */
2806         return hso_dev;
2807
2808 exit:
2809         if (serial) {
2810                 tty_unregister_device(tty_drv, serial->minor);
2811                 kfree(serial);
2812         }
2813         if (hso_dev)
2814                 kfree(hso_dev);
2815         return NULL;
2816
2817 }
2818
2819 static void hso_free_shared_int(struct hso_shared_int *mux)
2820 {
2821         usb_free_urb(mux->shared_intr_urb);
2822         kfree(mux->shared_intr_buf);
2823         mutex_unlock(&mux->shared_int_lock);
2824         kfree(mux);
2825 }
2826
2827 static
2828 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2829 {
2830         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2831
2832         if (!mux)
2833                 return NULL;
2834
2835         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2836                                     USB_DIR_IN);
2837         if (!mux->intr_endp) {
2838                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2839                 goto exit;
2840         }
2841
2842         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2843         if (!mux->shared_intr_urb) {
2844                 dev_err(&interface->dev, "Could not allocate intr urb?");
2845                 goto exit;
2846         }
2847         mux->shared_intr_buf =
2848                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2849                         GFP_KERNEL);
2850         if (!mux->shared_intr_buf) {
2851                 dev_err(&interface->dev, "Could not allocate intr buf?");
2852                 goto exit;
2853         }
2854
2855         mutex_init(&mux->shared_int_lock);
2856
2857         return mux;
2858
2859 exit:
2860         kfree(mux->shared_intr_buf);
2861         usb_free_urb(mux->shared_intr_urb);
2862         kfree(mux);
2863         return NULL;
2864 }
2865
2866 /* Gets the port spec for a certain interface */
2867 static int hso_get_config_data(struct usb_interface *interface)
2868 {
2869         struct usb_device *usbdev = interface_to_usbdev(interface);
2870         u8 config_data[17];
2871         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2872         s32 result;
2873
2874         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2875                             0x86, 0xC0, 0, 0, config_data, 17,
2876                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2877                 return -EIO;
2878         }
2879
2880         switch (config_data[if_num]) {
2881         case 0x0:
2882                 result = 0;
2883                 break;
2884         case 0x1:
2885                 result = HSO_PORT_DIAG;
2886                 break;
2887         case 0x2:
2888                 result = HSO_PORT_GPS;
2889                 break;
2890         case 0x3:
2891                 result = HSO_PORT_GPS_CONTROL;
2892                 break;
2893         case 0x4:
2894                 result = HSO_PORT_APP;
2895                 break;
2896         case 0x5:
2897                 result = HSO_PORT_APP2;
2898                 break;
2899         case 0x6:
2900                 result = HSO_PORT_CONTROL;
2901                 break;
2902         case 0x7:
2903                 result = HSO_PORT_NETWORK;
2904                 break;
2905         case 0x8:
2906                 result = HSO_PORT_MODEM;
2907                 break;
2908         case 0x9:
2909                 result = HSO_PORT_MSD;
2910                 break;
2911         case 0xa:
2912                 result = HSO_PORT_PCSC;
2913                 break;
2914         case 0xb:
2915                 result = HSO_PORT_VOICE;
2916                 break;
2917         default:
2918                 result = 0;
2919         }
2920
2921         if (result)
2922                 result |= HSO_INTF_BULK;
2923
2924         if (config_data[16] & 0x1)
2925                 result |= HSO_INFO_CRC_BUG;
2926
2927         return result;
2928 }
2929
2930 /* called once for each interface upon device insertion */
2931 static int hso_probe(struct usb_interface *interface,
2932                      const struct usb_device_id *id)
2933 {
2934         int mux, i, if_num, port_spec;
2935         unsigned char port_mask;
2936         struct hso_device *hso_dev = NULL;
2937         struct hso_shared_int *shared_int;
2938         struct hso_device *tmp_dev = NULL;
2939
2940         if_num = interface->altsetting->desc.bInterfaceNumber;
2941
2942         /* Get the interface/port specification from either driver_info or from
2943          * the device itself */
2944         if (id->driver_info)
2945                 port_spec = ((u32 *)(id->driver_info))[if_num];
2946         else
2947                 port_spec = hso_get_config_data(interface);
2948
2949         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2950                 dev_err(&interface->dev, "Not our interface\n");
2951                 return -ENODEV;
2952         }
2953         /* Check if we need to switch to alt interfaces prior to port
2954          * configuration */
2955         if (interface->num_altsetting > 1)
2956                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2957         interface->needs_remote_wakeup = 1;
2958
2959         /* Allocate new hso device(s) */
2960         switch (port_spec & HSO_INTF_MASK) {
2961         case HSO_INTF_MUX:
2962                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2963                         /* Create the network device */
2964                         if (!disable_net) {
2965                                 hso_dev = hso_create_net_device(interface,
2966                                                                 port_spec);
2967                                 if (!hso_dev)
2968                                         goto exit;
2969                                 tmp_dev = hso_dev;
2970                         }
2971                 }
2972
2973                 if (hso_get_mux_ports(interface, &port_mask))
2974                         /* TODO: de-allocate everything */
2975                         goto exit;
2976
2977                 shared_int = hso_create_shared_int(interface);
2978                 if (!shared_int)
2979                         goto exit;
2980
2981                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2982                         if (port_mask & i) {
2983                                 hso_dev = hso_create_mux_serial_device(
2984                                                 interface, i, shared_int);
2985                                 if (!hso_dev)
2986                                         goto exit;
2987                         }
2988                 }
2989
2990                 if (tmp_dev)
2991                         hso_dev = tmp_dev;
2992                 break;
2993
2994         case HSO_INTF_BULK:
2995                 /* It's a regular bulk interface */
2996                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
2997                     !disable_net)
2998                         hso_dev = hso_create_net_device(interface, port_spec);
2999                 else
3000                         hso_dev =
3001                             hso_create_bulk_serial_device(interface, port_spec);
3002                 if (!hso_dev)
3003                         goto exit;
3004                 break;
3005         default:
3006                 goto exit;
3007         }
3008
3009         /* save our data pointer in this device */
3010         usb_set_intfdata(interface, hso_dev);
3011
3012         /* done */
3013         return 0;
3014 exit:
3015         hso_free_interface(interface);
3016         return -ENODEV;
3017 }
3018
3019 /* device removed, cleaning up */
3020 static void hso_disconnect(struct usb_interface *interface)
3021 {
3022         hso_free_interface(interface);
3023
3024         /* remove reference of our private data */
3025         usb_set_intfdata(interface, NULL);
3026 }
3027
3028 static void async_get_intf(struct work_struct *data)
3029 {
3030         struct hso_device *hso_dev =
3031             container_of(data, struct hso_device, async_get_intf);
3032         usb_autopm_get_interface(hso_dev->interface);
3033 }
3034
3035 static void async_put_intf(struct work_struct *data)
3036 {
3037         struct hso_device *hso_dev =
3038             container_of(data, struct hso_device, async_put_intf);
3039         usb_autopm_put_interface(hso_dev->interface);
3040 }
3041
3042 static int hso_get_activity(struct hso_device *hso_dev)
3043 {
3044         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3045                 if (!hso_dev->is_active) {
3046                         hso_dev->is_active = 1;
3047                         schedule_work(&hso_dev->async_get_intf);
3048                 }
3049         }
3050
3051         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3052                 return -EAGAIN;
3053
3054         usb_mark_last_busy(hso_dev->usb);
3055
3056         return 0;
3057 }
3058
3059 static int hso_put_activity(struct hso_device *hso_dev)
3060 {
3061         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3062                 if (hso_dev->is_active) {
3063                         hso_dev->is_active = 0;
3064                         schedule_work(&hso_dev->async_put_intf);
3065                         return -EAGAIN;
3066                 }
3067         }
3068         hso_dev->is_active = 0;
3069         return 0;
3070 }
3071
3072 /* called by kernel when we need to suspend device */
3073 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3074 {
3075         int i, result;
3076
3077         /* Stop all serial ports */
3078         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3079                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3080                         result = hso_stop_serial_device(serial_table[i]);
3081                         if (result)
3082                                 goto out;
3083                 }
3084         }
3085
3086         /* Stop all network ports */
3087         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3088                 if (network_table[i] &&
3089                     (network_table[i]->interface == iface)) {
3090                         result = hso_stop_net_device(network_table[i]);
3091                         if (result)
3092                                 goto out;
3093                 }
3094         }
3095
3096 out:
3097         return 0;
3098 }
3099
3100 /* called by kernel when we need to resume device */
3101 static int hso_resume(struct usb_interface *iface)
3102 {
3103         int i, result = 0;
3104         struct hso_net *hso_net;
3105
3106         /* Start all serial ports */
3107         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3108                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3109                         if (dev2ser(serial_table[i])->open_count) {
3110                                 result =
3111                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3112                                 hso_kick_transmit(dev2ser(serial_table[i]));
3113                                 if (result)
3114                                         goto out;
3115                         }
3116                 }
3117         }
3118
3119         /* Start all network ports */
3120         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3121                 if (network_table[i] &&
3122                     (network_table[i]->interface == iface)) {
3123                         hso_net = dev2net(network_table[i]);
3124                         if (hso_net->flags & IFF_UP) {
3125                                 /* First transmit any lingering data,
3126                                    then restart the device. */
3127                                 if (hso_net->skb_tx_buf) {
3128                                         dev_dbg(&iface->dev,
3129                                                 "Transmitting"
3130                                                 " lingering data\n");
3131                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3132                                                            hso_net->net);
3133                                         hso_net->skb_tx_buf = NULL;
3134                                 }
3135                                 result = hso_start_net_device(network_table[i]);
3136                                 if (result)
3137                                         goto out;
3138                         }
3139                 }
3140         }
3141
3142 out:
3143         return result;
3144 }
3145
3146 static void hso_serial_ref_free(struct kref *ref)
3147 {
3148         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3149
3150         hso_free_serial_device(hso_dev);
3151 }
3152
3153 static void hso_free_interface(struct usb_interface *interface)
3154 {
3155         struct hso_serial *hso_dev;
3156         struct tty_struct *tty;
3157         int i;
3158
3159         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3160                 if (serial_table[i] &&
3161                     (serial_table[i]->interface == interface)) {
3162                         hso_dev = dev2ser(serial_table[i]);
3163                         spin_lock_irq(&hso_dev->serial_lock);
3164                         tty = tty_kref_get(hso_dev->tty);
3165                         spin_unlock_irq(&hso_dev->serial_lock);
3166                         if (tty)
3167                                 tty_hangup(tty);
3168                         mutex_lock(&hso_dev->parent->mutex);
3169                         tty_kref_put(tty);
3170                         hso_dev->parent->usb_gone = 1;
3171                         mutex_unlock(&hso_dev->parent->mutex);
3172                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3173                 }
3174         }
3175
3176         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3177                 if (network_table[i] &&
3178                     (network_table[i]->interface == interface)) {
3179                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3180                         /* hso_stop_net_device doesn't stop the net queue since
3181                          * traffic needs to start it again when suspended */
3182                         netif_stop_queue(dev2net(network_table[i])->net);
3183                         hso_stop_net_device(network_table[i]);
3184                         cancel_work_sync(&network_table[i]->async_put_intf);
3185                         cancel_work_sync(&network_table[i]->async_get_intf);
3186                         if (rfk) {
3187                                 rfkill_unregister(rfk);
3188                                 rfkill_destroy(rfk);
3189                         }
3190                         hso_free_net_device(network_table[i]);
3191                 }
3192         }
3193 }
3194
3195 /* Helper functions */
3196
3197 /* Get the endpoint ! */
3198 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3199                                                   int type, int dir)
3200 {
3201         int i;
3202         struct usb_host_interface *iface = intf->cur_altsetting;
3203         struct usb_endpoint_descriptor *endp;
3204
3205         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3206                 endp = &iface->endpoint[i].desc;
3207                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3208                     (usb_endpoint_type(endp) == type))
3209                         return endp;
3210         }
3211
3212         return NULL;
3213 }
3214
3215 /* Get the byte that describes which ports are enabled */
3216 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3217 {
3218         int i;
3219         struct usb_host_interface *iface = intf->cur_altsetting;
3220
3221         if (iface->extralen == 3) {
3222                 *ports = iface->extra[2];
3223                 return 0;
3224         }
3225
3226         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3227                 if (iface->endpoint[i].extralen == 3) {
3228                         *ports = iface->endpoint[i].extra[2];
3229                         return 0;
3230                 }
3231         }
3232
3233         return -1;
3234 }
3235
3236 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3237 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3238                                    struct usb_device *usb, gfp_t gfp)
3239 {
3240         int result;
3241
3242         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3243                          usb_rcvintpipe(usb,
3244                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3245                          shared_int->shared_intr_buf,
3246                          1,
3247                          intr_callback, shared_int,
3248                          shared_int->intr_endp->bInterval);
3249
3250         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3251         if (result)
3252                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3253                         result);
3254
3255         return result;
3256 }
3257
3258 /* operations setup of the serial interface */
3259 static const struct tty_operations hso_serial_ops = {
3260         .open = hso_serial_open,
3261         .close = hso_serial_close,
3262         .write = hso_serial_write,
3263         .write_room = hso_serial_write_room,
3264         .ioctl = hso_serial_ioctl,
3265         .set_termios = hso_serial_set_termios,
3266         .chars_in_buffer = hso_serial_chars_in_buffer,
3267         .tiocmget = hso_serial_tiocmget,
3268         .tiocmset = hso_serial_tiocmset,
3269         .unthrottle = hso_unthrottle
3270 };
3271
3272 static struct usb_driver hso_driver = {
3273         .name = driver_name,
3274         .probe = hso_probe,
3275         .disconnect = hso_disconnect,
3276         .id_table = hso_ids,
3277         .suspend = hso_suspend,
3278         .resume = hso_resume,
3279         .reset_resume = hso_resume,
3280         .supports_autosuspend = 1,
3281 };
3282
3283 static int __init hso_init(void)
3284 {
3285         int i;
3286         int result;
3287
3288         /* put it in the log */
3289         printk(KERN_INFO "hso: %s\n", version);
3290
3291         /* Initialise the serial table semaphore and table */
3292         spin_lock_init(&serial_table_lock);
3293         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3294                 serial_table[i] = NULL;
3295
3296         /* allocate our driver using the proper amount of supported minors */
3297         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3298         if (!tty_drv)
3299                 return -ENOMEM;
3300
3301         /* fill in all needed values */
3302         tty_drv->magic = TTY_DRIVER_MAGIC;
3303         tty_drv->owner = THIS_MODULE;
3304         tty_drv->driver_name = driver_name;
3305         tty_drv->name = tty_filename;
3306
3307         /* if major number is provided as parameter, use that one */
3308         if (tty_major)
3309                 tty_drv->major = tty_major;
3310
3311         tty_drv->minor_start = 0;
3312         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3313         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3314         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3315         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3316         tty_drv->init_termios = tty_std_termios;
3317         hso_init_termios(&tty_drv->init_termios);
3318         tty_set_operations(tty_drv, &hso_serial_ops);
3319
3320         /* register the tty driver */
3321         result = tty_register_driver(tty_drv);
3322         if (result) {
3323                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3324                         __func__, result);
3325                 return result;
3326         }
3327
3328         /* register this module as an usb driver */
3329         result = usb_register(&hso_driver);
3330         if (result) {
3331                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3332                         result);
3333                 /* cleanup serial interface */
3334                 tty_unregister_driver(tty_drv);
3335                 return result;
3336         }
3337
3338         /* done */
3339         return 0;
3340 }
3341
3342 static void __exit hso_exit(void)
3343 {
3344         printk(KERN_INFO "hso: unloaded\n");
3345
3346         tty_unregister_driver(tty_drv);
3347         /* deregister the usb driver */
3348         usb_deregister(&hso_driver);
3349 }
3350
3351 /* Module definitions */
3352 module_init(hso_init);
3353 module_exit(hso_exit);
3354
3355 MODULE_AUTHOR(MOD_AUTHOR);
3356 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3357 MODULE_LICENSE(MOD_LICENSE);
3358 MODULE_INFO(Version, DRIVER_VERSION);
3359
3360 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3361 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3362 module_param(debug, int, S_IRUGO | S_IWUSR);
3363
3364 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3365 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3366 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3367
3368 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3369 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3370 module_param(disable_net, int, S_IRUGO | S_IWUSR);