git.oblomov.eu Git - linux-2.6/blob - 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  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
   9  *                      <ajb@spheresystems.co.uk>
  10  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  11  *  Copyright (C) 2008 Novell, Inc.
  12  *
  13  *  This program is free software; you can redistribute it and/or modify
  14  *  it under the terms of the GNU General Public License version 2 as
  15  *  published by the Free Software Foundation.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  25  *  USA
  26  *
  27  *
  28  *****************************************************************************/
  29
  30 /******************************************************************************
  31  *
  32  * Description of the device:
  33  *
  34  * Interface 0: Contains the IP network interface on the bulk end points.
  35  *              The multiplexed serial ports are using the interrupt and
  36  *              control endpoints.
  37  *              Interrupt contains a bitmap telling which multiplexed
  38  *              serialport needs servicing.
  39  *
  40  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  41  *              port is opened, as this have a huge impact on the network port
  42  *              throughput.
  43  *
  44  * Interface 2: Standard modem interface - circuit switched interface, this
  45  *              can be used to make a standard ppp connection however it
  46  *              should not be used in conjunction with the IP network interface
  47  *              enabled for USB performance reasons i.e. if using this set
  48  *              ideally disable_net=1.
  49  *
  50  *****************************************************************************/
  51
  52 #include <linux/sched.h>
  53 #include <linux/slab.h>
  54 #include <linux/init.h>
  55 #include <linux/delay.h>
  56 #include <linux/netdevice.h>
  57 #include <linux/module.h>
  58 #include <linux/ethtool.h>
  59 #include <linux/usb.h>
  60 #include <linux/timer.h>
  61 #include <linux/tty.h>
  62 #include <linux/tty_driver.h>
  63 #include <linux/tty_flip.h>
  64 #include <linux/kmod.h>
  65 #include <linux/rfkill.h>
  66 #include <linux/ip.h>
  67 #include <linux/uaccess.h>
  68 #include <linux/usb/cdc.h>
  69 #include <net/arp.h>
  70 #include <asm/byteorder.h>
  71 #include <linux/serial_core.h>
  72 #include <linux/serial.h>
  73
  74
  75 #define DRIVER_VERSION                  "1.2"
  76 #define MOD_AUTHOR                      "Option Wireless"
  77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  78 #define MOD_LICENSE                     "GPL"
  79
  80 #define HSO_MAX_NET_DEVICES             10
  81 #define HSO__MAX_MTU                    2048
  82 #define DEFAULT_MTU                     1500
  83 #define DEFAULT_MRU                     1500
  84
  85 #define CTRL_URB_RX_SIZE                1024
  86 #define CTRL_URB_TX_SIZE                64
  87
  88 #define BULK_URB_RX_SIZE                4096
  89 #define BULK_URB_TX_SIZE                8192
  90
  91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_RX_BUF_COUNT           4
  94 #define USB_TYPE_OPTION_VENDOR          0x20
  95
  96 /* These definitions are used with the struct hso_net flags element */
  97 /* - use *_bit operations on it. (bit indices not values.) */
  98 #define HSO_NET_RUNNING                 0
  99
 100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 101
 102 #define HSO_SERIAL_MAGIC                0x48534f31
 103
 104 /* Number of ttys to handle */
 105 #define HSO_SERIAL_TTY_MINORS           256
 106
 107 #define MAX_RX_URBS                     2
 108
 109 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 110 {
 111         if (tty)
 112                 return tty->driver_data;
 113         return NULL;
 114 }
 115
 116 /*****************************************************************************/
 117 /* Debugging functions                                                       */
 118 /*****************************************************************************/
 119 #define D__(lvl_, fmt, arg...)                          \
 120         do {                                            \
 121                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 122                        __LINE__, __func__, ## arg);     \
 123         } while (0)
 124
 125 #define D_(lvl, args...)                                \
 126         do {                                            \
 127                 if (lvl & debug)                        \
 128                         D__(KERN_INFO, args);           \
 129         } while (0)
 130
 131 #define D1(args...)     D_(0x01, ##args)
 132 #define D2(args...)     D_(0x02, ##args)
 133 #define D3(args...)     D_(0x04, ##args)
 134 #define D4(args...)     D_(0x08, ##args)
 135 #define D5(args...)     D_(0x10, ##args)
 136
 137 /*****************************************************************************/
 138 /* Enumerators                                                               */
 139 /*****************************************************************************/
 140 enum pkt_parse_state {
 141         WAIT_IP,
 142         WAIT_DATA,
 143         WAIT_SYNC
 144 };
 145
 146 /*****************************************************************************/
 147 /* Structs                                                                   */
 148 /*****************************************************************************/
 149
 150 struct hso_shared_int {
 151         struct usb_endpoint_descriptor *intr_endp;
 152         void *shared_intr_buf;
 153         struct urb *shared_intr_urb;
 154         struct usb_device *usb;
 155         int use_count;
 156         int ref_count;
 157         struct mutex shared_int_lock;
 158 };
 159
 160 struct hso_net {
 161         struct hso_device *parent;
 162         struct net_device *net;
 163         struct rfkill *rfkill;
 164
 165         struct usb_endpoint_descriptor *in_endp;
 166         struct usb_endpoint_descriptor *out_endp;
 167
 168         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 169         struct urb *mux_bulk_tx_urb;
 170         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 171         void *mux_bulk_tx_buf;
 172
 173         struct sk_buff *skb_rx_buf;
 174         struct sk_buff *skb_tx_buf;
 175
 176         enum pkt_parse_state rx_parse_state;
 177         spinlock_t net_lock;
 178
 179         unsigned short rx_buf_size;
 180         unsigned short rx_buf_missing;
 181         struct iphdr rx_ip_hdr;
 182
 183         unsigned long flags;
 184 };
 185
 186 enum rx_ctrl_state{
 187         RX_IDLE,
 188         RX_SENT,
 189         RX_PENDING
 190 };
 191
 192 #define BM_REQUEST_TYPE (0xa1)
 193 #define B_NOTIFICATION  (0x20)
 194 #define W_VALUE         (0x0)
 195 #define W_INDEX         (0x2)
 196 #define W_LENGTH        (0x2)
 197
 198 #define B_OVERRUN       (0x1<<6)
 199 #define B_PARITY        (0x1<<5)
 200 #define B_FRAMING       (0x1<<4)
 201 #define B_RING_SIGNAL   (0x1<<3)
 202 #define B_BREAK         (0x1<<2)
 203 #define B_TX_CARRIER    (0x1<<1)
 204 #define B_RX_CARRIER    (0x1<<0)
 205
 206 struct hso_serial_state_notification {
 207         u8 bmRequestType;
 208         u8 bNotification;
 209         u16 wValue;
 210         u16 wIndex;
 211         u16 wLength;
 212         u16 UART_state_bitmap;
 213 } __attribute__((packed));
 214
 215 struct hso_tiocmget {
 216         struct mutex mutex;
 217         wait_queue_head_t waitq;
 218         int    intr_completed;
 219         struct usb_endpoint_descriptor *endp;
 220         struct urb *urb;
 221         struct hso_serial_state_notification serial_state_notification;
 222         u16    prev_UART_state_bitmap;
 223         struct uart_icount icount;
 224 };
 225
 226
 227 struct hso_serial {
 228         struct hso_device *parent;
 229         int magic;
 230         u8 minor;
 231
 232         struct hso_shared_int *shared_int;
 233
 234         /* rx/tx urb could be either a bulk urb or a control urb depending
 235            on which serial port it is used on. */
 236         struct urb *rx_urb[MAX_RX_URBS];
 237         u8 num_rx_urbs;
 238         u8 *rx_data[MAX_RX_URBS];
 239         u16 rx_data_length;     /* should contain allocated length */
 240
 241         struct urb *tx_urb;
 242         u8 *tx_data;
 243         u8 *tx_buffer;
 244         u16 tx_data_length;     /* should contain allocated length */
 245         u16 tx_data_count;
 246         u16 tx_buffer_count;
 247         struct usb_ctrlrequest ctrl_req_tx;
 248         struct usb_ctrlrequest ctrl_req_rx;
 249
 250         struct usb_endpoint_descriptor *in_endp;
 251         struct usb_endpoint_descriptor *out_endp;
 252
 253         enum rx_ctrl_state rx_state;
 254         u8 rts_state;
 255         u8 dtr_state;
 256         unsigned tx_urb_used:1;
 257
 258         /* from usb_serial_port */
 259         struct tty_struct *tty;
 260         int open_count;
 261         spinlock_t serial_lock;
 262
 263         int (*write_data) (struct hso_serial *serial);
 264         struct hso_tiocmget  *tiocmget;
 265         /* Hacks required to get flow control
 266          * working on the serial receive buffers
 267          * so as not to drop characters on the floor.
 268          */
 269         int  curr_rx_urb_idx;
 270         u16  curr_rx_urb_offset;
 271         u8   rx_urb_filled[MAX_RX_URBS];
 272         struct tasklet_struct unthrottle_tasklet;
 273         struct work_struct    retry_unthrottle_workqueue;
 274 };
 275
 276 struct hso_device {
 277         union {
 278                 struct hso_serial *dev_serial;
 279                 struct hso_net *dev_net;
 280         } port_data;
 281
 282         u32 port_spec;
 283
 284         u8 is_active;
 285         u8 usb_gone;
 286         struct work_struct async_get_intf;
 287         struct work_struct async_put_intf;
 288
 289         struct usb_device *usb;
 290         struct usb_interface *interface;
 291
 292         struct device *dev;
 293         struct kref ref;
 294         struct mutex mutex;
 295 };
 296
 297 /* Type of interface */
 298 #define HSO_INTF_MASK           0xFF00
 299 #define HSO_INTF_MUX            0x0100
 300 #define HSO_INTF_BULK           0x0200
 301
 302 /* Type of port */
 303 #define HSO_PORT_MASK           0xFF
 304 #define HSO_PORT_NO_PORT        0x0
 305 #define HSO_PORT_CONTROL        0x1
 306 #define HSO_PORT_APP            0x2
 307 #define HSO_PORT_GPS            0x3
 308 #define HSO_PORT_PCSC           0x4
 309 #define HSO_PORT_APP2           0x5
 310 #define HSO_PORT_GPS_CONTROL    0x6
 311 #define HSO_PORT_MSD            0x7
 312 #define HSO_PORT_VOICE          0x8
 313 #define HSO_PORT_DIAG2          0x9
 314 #define HSO_PORT_DIAG           0x10
 315 #define HSO_PORT_MODEM          0x11
 316 #define HSO_PORT_NETWORK        0x12
 317
 318 /* Additional device info */
 319 #define HSO_INFO_MASK           0xFF000000
 320 #define HSO_INFO_CRC_BUG        0x01000000
 321
 322 /*****************************************************************************/
 323 /* Prototypes                                                                */
 324 /*****************************************************************************/
 325 /* Serial driver functions */
 326 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 327                                unsigned int set, unsigned int clear);
 328 static void ctrl_callback(struct urb *urb);
 329 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 330 static void hso_kick_transmit(struct hso_serial *serial);
 331 /* Helper functions */
 332 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 333                                    struct usb_device *usb, gfp_t gfp);
 334 static void log_usb_status(int status, const char *function);
 335 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 336                                                   int type, int dir);
 337 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 338 static void hso_free_interface(struct usb_interface *intf);
 339 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 340 static int hso_stop_serial_device(struct hso_device *hso_dev);
 341 static int hso_start_net_device(struct hso_device *hso_dev);
 342 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 343 static int hso_stop_net_device(struct hso_device *hso_dev);
 344 static void hso_serial_ref_free(struct kref *ref);
 345 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 346 static int hso_mux_serial_read(struct hso_serial *serial);
 347 static void async_get_intf(struct work_struct *data);
 348 static void async_put_intf(struct work_struct *data);
 349 static int hso_put_activity(struct hso_device *hso_dev);
 350 static int hso_get_activity(struct hso_device *hso_dev);
 351 static void tiocmget_intr_callback(struct urb *urb);
 352 /*****************************************************************************/
 353 /* Helping functions                                                         */
 354 /*****************************************************************************/
 355
 356 /* #define DEBUG */
 357
 358 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 359 {
 360         return hso_dev->port_data.dev_net;
 361 }
 362
 363 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 364 {
 365         return hso_dev->port_data.dev_serial;
 366 }
 367
 368 /* Debugging functions */
 369 #ifdef DEBUG
 370 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 371                      unsigned int len)
 372 {
 373         static char name[255];
 374
 375         sprintf(name, "hso[%d:%s]", line_count, func_name);
 376         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 377 }
 378
 379 #define DUMP(buf_, len_)        \
 380         dbg_dump(__LINE__, __func__, buf_, len_)
 381
 382 #define DUMP1(buf_, len_)                       \
 383         do {                                    \
 384                 if (0x01 & debug)               \
 385                         DUMP(buf_, len_);       \
 386         } while (0)
 387 #else
 388 #define DUMP(buf_, len_)
 389 #define DUMP1(buf_, len_)
 390 #endif
 391
 392 /* module parameters */
 393 static int debug;
 394 static int tty_major;
 395 static int disable_net;
 396
 397 /* driver info */
 398 static const char driver_name[] = "hso";
 399 static const char tty_filename[] = "ttyHS";
 400 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 401 /* the usb driver itself (registered in hso_init) */
 402 static struct usb_driver hso_driver;
 403 /* serial structures */
 404 static struct tty_driver *tty_drv;
 405 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 406 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 407 static spinlock_t serial_table_lock;
 408
 409 static const s32 default_port_spec[] = {
 410         HSO_INTF_MUX | HSO_PORT_NETWORK,
 411         HSO_INTF_BULK | HSO_PORT_DIAG,
 412         HSO_INTF_BULK | HSO_PORT_MODEM,
 413         0
 414 };
 415
 416 static const s32 icon321_port_spec[] = {
 417         HSO_INTF_MUX | HSO_PORT_NETWORK,
 418         HSO_INTF_BULK | HSO_PORT_DIAG2,
 419         HSO_INTF_BULK | HSO_PORT_MODEM,
 420         HSO_INTF_BULK | HSO_PORT_DIAG,
 421         0
 422 };
 423
 424 #define default_port_device(vendor, product)    \
 425         USB_DEVICE(vendor, product),    \
 426                 .driver_info = (kernel_ulong_t)default_port_spec
 427
 428 #define icon321_port_device(vendor, product)    \
 429         USB_DEVICE(vendor, product),    \
 430                 .driver_info = (kernel_ulong_t)icon321_port_spec
 431
 432 /* list of devices we support */
 433 static const struct usb_device_id hso_ids[] = {
 434         {default_port_device(0x0af0, 0x6711)},
 435         {default_port_device(0x0af0, 0x6731)},
 436         {default_port_device(0x0af0, 0x6751)},
 437         {default_port_device(0x0af0, 0x6771)},
 438         {default_port_device(0x0af0, 0x6791)},
 439         {default_port_device(0x0af0, 0x6811)},
 440         {default_port_device(0x0af0, 0x6911)},
 441         {default_port_device(0x0af0, 0x6951)},
 442         {default_port_device(0x0af0, 0x6971)},
 443         {default_port_device(0x0af0, 0x7011)},
 444         {default_port_device(0x0af0, 0x7031)},
 445         {default_port_device(0x0af0, 0x7051)},
 446         {default_port_device(0x0af0, 0x7071)},
 447         {default_port_device(0x0af0, 0x7111)},
 448         {default_port_device(0x0af0, 0x7211)},
 449         {default_port_device(0x0af0, 0x7251)},
 450         {default_port_device(0x0af0, 0x7271)},
 451         {default_port_device(0x0af0, 0x7311)},
 452         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 453         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 454         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 455         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 456         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 457         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 458         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 459         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 460         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7701)},
 462         {USB_DEVICE(0x0af0, 0x7801)},
 463         {USB_DEVICE(0x0af0, 0x7901)},
 464         {USB_DEVICE(0x0af0, 0x7361)},
 465         {icon321_port_device(0x0af0, 0xd051)},
 466         {}
 467 };
 468 MODULE_DEVICE_TABLE(usb, hso_ids);
 469
 470 /* Sysfs attribute */
 471 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 472                                        struct device_attribute *attr,
 473                                        char *buf)
 474 {
 475         struct hso_device *hso_dev = dev->driver_data;
 476         char *port_name;
 477
 478         if (!hso_dev)
 479                 return 0;
 480
 481         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 482         case HSO_PORT_CONTROL:
 483                 port_name = "Control";
 484                 break;
 485         case HSO_PORT_APP:
 486                 port_name = "Application";
 487                 break;
 488         case HSO_PORT_APP2:
 489                 port_name = "Application2";
 490                 break;
 491         case HSO_PORT_GPS:
 492                 port_name = "GPS";
 493                 break;
 494         case HSO_PORT_GPS_CONTROL:
 495                 port_name = "GPS Control";
 496                 break;
 497         case HSO_PORT_PCSC:
 498                 port_name = "PCSC";
 499                 break;
 500         case HSO_PORT_DIAG:
 501                 port_name = "Diagnostic";
 502                 break;
 503         case HSO_PORT_DIAG2:
 504                 port_name = "Diagnostic2";
 505                 break;
 506         case HSO_PORT_MODEM:
 507                 port_name = "Modem";
 508                 break;
 509         case HSO_PORT_NETWORK:
 510                 port_name = "Network";
 511                 break;
 512         default:
 513                 port_name = "Unknown";
 514                 break;
 515         }
 516
 517         return sprintf(buf, "%s\n", port_name);
 518 }
 519 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 520
 521 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 522 {
 523         int idx;
 524
 525         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 526                 if (serial->rx_urb[idx] == urb)
 527                         return idx;
 528         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 529         return -1;
 530 }
 531
 532 /* converts mux value to a port spec value */
 533 static u32 hso_mux_to_port(int mux)
 534 {
 535         u32 result;
 536
 537         switch (mux) {
 538         case 0x1:
 539                 result = HSO_PORT_CONTROL;
 540                 break;
 541         case 0x2:
 542                 result = HSO_PORT_APP;
 543                 break;
 544         case 0x4:
 545                 result = HSO_PORT_PCSC;
 546                 break;
 547         case 0x8:
 548                 result = HSO_PORT_GPS;
 549                 break;
 550         case 0x10:
 551                 result = HSO_PORT_APP2;
 552                 break;
 553         default:
 554                 result = HSO_PORT_NO_PORT;
 555         }
 556         return result;
 557 }
 558
 559 /* converts port spec value to a mux value */
 560 static u32 hso_port_to_mux(int port)
 561 {
 562         u32 result;
 563
 564         switch (port & HSO_PORT_MASK) {
 565         case HSO_PORT_CONTROL:
 566                 result = 0x0;
 567                 break;
 568         case HSO_PORT_APP:
 569                 result = 0x1;
 570                 break;
 571         case HSO_PORT_PCSC:
 572                 result = 0x2;
 573                 break;
 574         case HSO_PORT_GPS:
 575                 result = 0x3;
 576                 break;
 577         case HSO_PORT_APP2:
 578                 result = 0x4;
 579                 break;
 580         default:
 581                 result = 0x0;
 582         }
 583         return result;
 584 }
 585
 586 static struct hso_serial *get_serial_by_shared_int_and_type(
 587                                         struct hso_shared_int *shared_int,
 588                                         int mux)
 589 {
 590         int i, port;
 591
 592         port = hso_mux_to_port(mux);
 593
 594         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 595                 if (serial_table[i]
 596                     && (dev2ser(serial_table[i])->shared_int == shared_int)
 597                     && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 598                         return dev2ser(serial_table[i]);
 599                 }
 600         }
 601
 602         return NULL;
 603 }
 604
 605 static struct hso_serial *get_serial_by_index(unsigned index)
 606 {
 607         struct hso_serial *serial = NULL;
 608         unsigned long flags;
 609
 610         spin_lock_irqsave(&serial_table_lock, flags);
 611         if (serial_table[index])
 612                 serial = dev2ser(serial_table[index]);
 613         spin_unlock_irqrestore(&serial_table_lock, flags);
 614
 615         return serial;
 616 }
 617
 618 static int get_free_serial_index(void)
 619 {
 620         int index;
 621         unsigned long flags;
 622
 623         spin_lock_irqsave(&serial_table_lock, flags);
 624         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 625                 if (serial_table[index] == NULL) {
 626                         spin_unlock_irqrestore(&serial_table_lock, flags);
 627                         return index;
 628                 }
 629         }
 630         spin_unlock_irqrestore(&serial_table_lock, flags);
 631
 632         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 633         return -1;
 634 }
 635
 636 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 637 {
 638         unsigned long flags;
 639
 640         spin_lock_irqsave(&serial_table_lock, flags);
 641         if (serial)
 642                 serial_table[index] = serial->parent;
 643         else
 644                 serial_table[index] = NULL;
 645         spin_unlock_irqrestore(&serial_table_lock, flags);
 646 }
 647
 648 /* log a meaningful explanation of an USB status */
 649 static void log_usb_status(int status, const char *function)
 650 {
 651         char *explanation;
 652
 653         switch (status) {
 654         case -ENODEV:
 655                 explanation = "no device";
 656                 break;
 657         case -ENOENT:
 658                 explanation = "endpoint not enabled";
 659                 break;
 660         case -EPIPE:
 661                 explanation = "endpoint stalled";
 662                 break;
 663         case -ENOSPC:
 664                 explanation = "not enough bandwidth";
 665                 break;
 666         case -ESHUTDOWN:
 667                 explanation = "device disabled";
 668                 break;
 669         case -EHOSTUNREACH:
 670                 explanation = "device suspended";
 671                 break;
 672         case -EINVAL:
 673         case -EAGAIN:
 674         case -EFBIG:
 675         case -EMSGSIZE:
 676                 explanation = "internal error";
 677                 break;
 678         default:
 679                 explanation = "unknown status";
 680                 break;
 681         }
 682         D1("%s: received USB status - %s (%d)", function, explanation, status);
 683 }
 684
 685 /* Network interface functions */
 686
 687 /* called when net interface is brought up by ifconfig */
 688 static int hso_net_open(struct net_device *net)
 689 {
 690         struct hso_net *odev = netdev_priv(net);
 691         unsigned long flags = 0;
 692
 693         if (!odev) {
 694                 dev_err(&net->dev, "No net device !\n");
 695                 return -ENODEV;
 696         }
 697
 698         odev->skb_tx_buf = NULL;
 699
 700         /* setup environment */
 701         spin_lock_irqsave(&odev->net_lock, flags);
 702         odev->rx_parse_state = WAIT_IP;
 703         odev->rx_buf_size = 0;
 704         odev->rx_buf_missing = sizeof(struct iphdr);
 705         spin_unlock_irqrestore(&odev->net_lock, flags);
 706
 707         /* We are up and running. */
 708         set_bit(HSO_NET_RUNNING, &odev->flags);
 709         hso_start_net_device(odev->parent);
 710
 711         /* Tell the kernel we are ready to start receiving from it */
 712         netif_start_queue(net);
 713
 714         return 0;
 715 }
 716
 717 /* called when interface is brought down by ifconfig */
 718 static int hso_net_close(struct net_device *net)
 719 {
 720         struct hso_net *odev = netdev_priv(net);
 721
 722         /* we don't need the queue anymore */
 723         netif_stop_queue(net);
 724         /* no longer running */
 725         clear_bit(HSO_NET_RUNNING, &odev->flags);
 726
 727         hso_stop_net_device(odev->parent);
 728
 729         /* done */
 730         return 0;
 731 }
 732
 733 /* USB tells is xmit done, we should start the netqueue again */
 734 static void write_bulk_callback(struct urb *urb)
 735 {
 736         struct hso_net *odev = urb->context;
 737         int status = urb->status;
 738
 739         /* Sanity check */
 740         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 741                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 742                 return;
 743         }
 744
 745         /* Do we still have a valid kernel network device? */
 746         if (!netif_device_present(odev->net)) {
 747                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 748                         __func__);
 749                 return;
 750         }
 751
 752         /* log status, but don't act on it, we don't need to resubmit anything
 753          * anyhow */
 754         if (status)
 755                 log_usb_status(status, __func__);
 756
 757         hso_put_activity(odev->parent);
 758
 759         /* Tell the network interface we are ready for another frame */
 760         netif_wake_queue(odev->net);
 761 }
 762
 763 /* called by kernel when we need to transmit a packet */
 764 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 765 {
 766         struct hso_net *odev = netdev_priv(net);
 767         int result;
 768
 769         /* Tell the kernel, "No more frames 'til we are done with this one." */
 770         netif_stop_queue(net);
 771         if (hso_get_activity(odev->parent) == -EAGAIN) {
 772                 odev->skb_tx_buf = skb;
 773                 return 0;
 774         }
 775
 776         /* log if asked */
 777         DUMP1(skb->data, skb->len);
 778         /* Copy it from kernel memory to OUR memory */
 779         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 780         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 781
 782         /* Fill in the URB for shipping it out. */
 783         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 784                           odev->parent->usb,
 785                           usb_sndbulkpipe(odev->parent->usb,
 786                                           odev->out_endp->
 787                                           bEndpointAddress & 0x7F),
 788                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 789                           odev);
 790
 791         /* Deal with the Zero Length packet problem, I hope */
 792         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 793
 794         /* Send the URB on its merry way. */
 795         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 796         if (result) {
 797                 dev_warn(&odev->parent->interface->dev,
 798                         "failed mux_bulk_tx_urb %d", result);
 799                 net->stats.tx_errors++;
 800                 netif_start_queue(net);
 801         } else {
 802                 net->stats.tx_packets++;
 803                 net->stats.tx_bytes += skb->len;
 804                 /* And tell the kernel when the last transmit started. */
 805                 net->trans_start = jiffies;
 806         }
 807         dev_kfree_skb(skb);
 808         /* we're done */
 809         return result;
 810 }
 811
 812 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 813 {
 814         struct hso_net *odev = netdev_priv(net);
 815
 816         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 817         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 818         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 819 }
 820
 821 static struct ethtool_ops ops = {
 822         .get_drvinfo = hso_get_drvinfo,
 823         .get_link = ethtool_op_get_link
 824 };
 825
 826 /* called when a packet did not ack after watchdogtimeout */
 827 static void hso_net_tx_timeout(struct net_device *net)
 828 {
 829         struct hso_net *odev = netdev_priv(net);
 830
 831         if (!odev)
 832                 return;
 833
 834         /* Tell syslog we are hosed. */
 835         dev_warn(&net->dev, "Tx timed out.\n");
 836
 837         /* Tear the waiting frame off the list */
 838         if (odev->mux_bulk_tx_urb
 839             && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 840                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 841
 842         /* Update statistics */
 843         net->stats.tx_errors++;
 844 }
 845
 846 /* make a real packet from the received USB buffer */
 847 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 848                         unsigned int count, unsigned char is_eop)
 849 {
 850         unsigned short temp_bytes;
 851         unsigned short buffer_offset = 0;
 852         unsigned short frame_len;
 853         unsigned char *tmp_rx_buf;
 854
 855         /* log if needed */
 856         D1("Rx %d bytes", count);
 857         DUMP(ip_pkt, min(128, (int)count));
 858
 859         while (count) {
 860                 switch (odev->rx_parse_state) {
 861                 case WAIT_IP:
 862                         /* waiting for IP header. */
 863                         /* wanted bytes - size of ip header */
 864                         temp_bytes =
 865                             (count <
 866                              odev->rx_buf_missing) ? count : odev->
 867                             rx_buf_missing;
 868
 869                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 870                                odev->rx_buf_size, ip_pkt + buffer_offset,
 871                                temp_bytes);
 872
 873                         odev->rx_buf_size += temp_bytes;
 874                         buffer_offset += temp_bytes;
 875                         odev->rx_buf_missing -= temp_bytes;
 876                         count -= temp_bytes;
 877
 878                         if (!odev->rx_buf_missing) {
 879                                 /* header is complete allocate an sk_buffer and
 880                                  * continue to WAIT_DATA */
 881                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 882
 883                                 if ((frame_len > DEFAULT_MRU) ||
 884                                     (frame_len < sizeof(struct iphdr))) {
 885                                         dev_err(&odev->net->dev,
 886                                                 "Invalid frame (%d) length\n",
 887                                                 frame_len);
 888                                         odev->rx_parse_state = WAIT_SYNC;
 889                                         continue;
 890                                 }
 891                                 /* Allocate an sk_buff */
 892                                 odev->skb_rx_buf = dev_alloc_skb(frame_len);
 893                                 if (!odev->skb_rx_buf) {
 894                                         /* We got no receive buffer. */
 895                                         D1("could not allocate memory");
 896                                         odev->rx_parse_state = WAIT_SYNC;
 897                                         return;
 898                                 }
 899                                 /* Here's where it came from */
 900                                 odev->skb_rx_buf->dev = odev->net;
 901
 902                                 /* Copy what we got so far. make room for iphdr
 903                                  * after tail. */
 904                                 tmp_rx_buf =
 905                                     skb_put(odev->skb_rx_buf,
 906                                             sizeof(struct iphdr));
 907                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 908                                        sizeof(struct iphdr));
 909
 910                                 /* ETH_HLEN */
 911                                 odev->rx_buf_size = sizeof(struct iphdr);
 912
 913                                 /* Filip actually use .tot_len */
 914                                 odev->rx_buf_missing =
 915                                     frame_len - sizeof(struct iphdr);
 916                                 odev->rx_parse_state = WAIT_DATA;
 917                         }
 918                         break;
 919
 920                 case WAIT_DATA:
 921                         temp_bytes = (count < odev->rx_buf_missing)
 922                                         ? count : odev->rx_buf_missing;
 923
 924                         /* Copy the rest of the bytes that are left in the
 925                          * buffer into the waiting sk_buf. */
 926                         /* Make room for temp_bytes after tail. */
 927                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 928                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 929
 930                         odev->rx_buf_missing -= temp_bytes;
 931                         count -= temp_bytes;
 932                         buffer_offset += temp_bytes;
 933                         odev->rx_buf_size += temp_bytes;
 934                         if (!odev->rx_buf_missing) {
 935                                 /* Packet is complete. Inject into stack. */
 936                                 /* We have IP packet here */
 937                                 odev->skb_rx_buf->protocol =
 938                                                 __constant_htons(ETH_P_IP);
 939                                 /* don't check it */
 940                                 odev->skb_rx_buf->ip_summed =
 941                                         CHECKSUM_UNNECESSARY;
 942
 943                                 skb_reset_mac_header(odev->skb_rx_buf);
 944
 945                                 /* Ship it off to the kernel */
 946                                 netif_rx(odev->skb_rx_buf);
 947                                 /* No longer our buffer. */
 948                                 odev->skb_rx_buf = NULL;
 949
 950                                 /* update out statistics */
 951                                 odev->net->stats.rx_packets++;
 952
 953                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 954
 955                                 odev->rx_buf_size = 0;
 956                                 odev->rx_buf_missing = sizeof(struct iphdr);
 957                                 odev->rx_parse_state = WAIT_IP;
 958                         }
 959                         break;
 960
 961                 case WAIT_SYNC:
 962                         D1(" W_S");
 963                         count = 0;
 964                         break;
 965                 default:
 966                         D1(" ");
 967                         count--;
 968                         break;
 969                 }
 970         }
 971
 972         /* Recovery mechanism for WAIT_SYNC state. */
 973         if (is_eop) {
 974                 if (odev->rx_parse_state == WAIT_SYNC) {
 975                         odev->rx_parse_state = WAIT_IP;
 976                         odev->rx_buf_size = 0;
 977                         odev->rx_buf_missing = sizeof(struct iphdr);
 978                 }
 979         }
 980 }
 981
 982 /* Moving data from usb to kernel (in interrupt state) */
 983 static void read_bulk_callback(struct urb *urb)
 984 {
 985         struct hso_net *odev = urb->context;
 986         struct net_device *net;
 987         int result;
 988         int status = urb->status;
 989
 990         /* is al ok?  (Filip: Who's Al ?) */
 991         if (status) {
 992                 log_usb_status(status, __func__);
 993                 return;
 994         }
 995
 996         /* Sanity check */
 997         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 998                 D1("BULK IN callback but driver is not active!");
 999                 return;
1000         }
1001         usb_mark_last_busy(urb->dev);
1002
1003         net = odev->net;
1004
1005         if (!netif_device_present(net)) {
1006                 /* Somebody killed our network interface... */
1007                 return;
1008         }
1009
1010         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1011                 u32 rest;
1012                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1013                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1014                 if (((rest == 5) || (rest == 6))
1015                     && !memcmp(((u8 *) urb->transfer_buffer) +
1016                                urb->actual_length - 4, crc_check, 4)) {
1017                         urb->actual_length -= 4;
1018                 }
1019         }
1020
1021         /* do we even have a packet? */
1022         if (urb->actual_length) {
1023                 /* Handle the IP stream, add header and push it onto network
1024                  * stack if the packet is complete. */
1025                 spin_lock(&odev->net_lock);
1026                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1027                             (urb->transfer_buffer_length >
1028                              urb->actual_length) ? 1 : 0);
1029                 spin_unlock(&odev->net_lock);
1030         }
1031
1032         /* We are done with this URB, resubmit it. Prep the USB to wait for
1033          * another frame. Reuse same as received. */
1034         usb_fill_bulk_urb(urb,
1035                           odev->parent->usb,
1036                           usb_rcvbulkpipe(odev->parent->usb,
1037                                           odev->in_endp->
1038                                           bEndpointAddress & 0x7F),
1039                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1040                           read_bulk_callback, odev);
1041
1042         /* Give this to the USB subsystem so it can tell us when more data
1043          * arrives. */
1044         result = usb_submit_urb(urb, GFP_ATOMIC);
1045         if (result)
1046                 dev_warn(&odev->parent->interface->dev,
1047                          "%s failed submit mux_bulk_rx_urb %d", __func__,
1048                          result);
1049 }
1050
1051 /* Serial driver functions */
1052
1053 static void hso_init_termios(struct ktermios *termios)
1054 {
1055         /*
1056          * The default requirements for this device are:
1057          */
1058         termios->c_iflag &=
1059                 ~(IGNBRK        /* disable ignore break */
1060                 | BRKINT        /* disable break causes interrupt */
1061                 | PARMRK        /* disable mark parity errors */
1062                 | ISTRIP        /* disable clear high bit of input characters */
1063                 | INLCR         /* disable translate NL to CR */
1064                 | IGNCR         /* disable ignore CR */
1065                 | ICRNL         /* disable translate CR to NL */
1066                 | IXON);        /* disable enable XON/XOFF flow control */
1067
1068         /* disable postprocess output characters */
1069         termios->c_oflag &= ~OPOST;
1070
1071         termios->c_lflag &=
1072                 ~(ECHO          /* disable echo input characters */
1073                 | ECHONL        /* disable echo new line */
1074                 | ICANON        /* disable erase, kill, werase, and rprnt
1075                                    special characters */
1076                 | ISIG          /* disable interrupt, quit, and suspend special
1077                                    characters */
1078                 | IEXTEN);      /* disable non-POSIX special characters */
1079
1080         termios->c_cflag &=
1081                 ~(CSIZE         /* no size */
1082                 | PARENB        /* disable parity bit */
1083                 | CBAUD         /* clear current baud rate */
1084                 | CBAUDEX);     /* clear current buad rate */
1085
1086         termios->c_cflag |= CS8;        /* character size 8 bits */
1087
1088         /* baud rate 115200 */
1089         tty_termios_encode_baud_rate(termios, 115200, 115200);
1090 }
1091
1092 static void _hso_serial_set_termios(struct tty_struct *tty,
1093                                     struct ktermios *old)
1094 {
1095         struct hso_serial *serial = get_serial_by_tty(tty);
1096         struct ktermios *termios;
1097
1098         if (!serial) {
1099                 printk(KERN_ERR "%s: no tty structures", __func__);
1100                 return;
1101         }
1102
1103         D4("port %d", serial->minor);
1104
1105         /*
1106          *      Fix up unsupported bits
1107          */
1108         termios = tty->termios;
1109         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1110
1111         termios->c_cflag &=
1112                 ~(CSIZE         /* no size */
1113                 | PARENB        /* disable parity bit */
1114                 | CBAUD         /* clear current baud rate */
1115                 | CBAUDEX);     /* clear current buad rate */
1116
1117         termios->c_cflag |= CS8;        /* character size 8 bits */
1118
1119         /* baud rate 115200 */
1120         tty_encode_baud_rate(tty, 115200, 115200);
1121 }
1122
1123 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1124 {
1125         int result;
1126 #ifdef CONFIG_HSO_AUTOPM
1127         usb_mark_last_busy(urb->dev);
1128 #endif
1129         /* We are done with this URB, resubmit it. Prep the USB to wait for
1130          * another frame */
1131         usb_fill_bulk_urb(urb, serial->parent->usb,
1132                           usb_rcvbulkpipe(serial->parent->usb,
1133                                           serial->in_endp->
1134                                           bEndpointAddress & 0x7F),
1135                           urb->transfer_buffer, serial->rx_data_length,
1136                           hso_std_serial_read_bulk_callback, serial);
1137         /* Give this to the USB subsystem so it can tell us when more data
1138          * arrives. */
1139         result = usb_submit_urb(urb, GFP_ATOMIC);
1140         if (result) {
1141                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1142                         __func__, result);
1143         }
1144 }
1145
1146
1147
1148
1149 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1150 {
1151         int count;
1152         struct urb *curr_urb;
1153
1154         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1155                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1156                 count = put_rxbuf_data(curr_urb, serial);
1157                 if (count == -1)
1158                         return;
1159                 if (count == 0) {
1160                         serial->curr_rx_urb_idx++;
1161                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1162                                 serial->curr_rx_urb_idx = 0;
1163                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1164                 }
1165         }
1166 }
1167
1168 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1169 {
1170         int count = 0;
1171         struct urb *urb;
1172
1173         urb = serial->rx_urb[0];
1174         if (serial->open_count > 0) {
1175                 count = put_rxbuf_data(urb, serial);
1176                 if (count == -1)
1177                         return;
1178         }
1179         /* Re issue a read as long as we receive data. */
1180
1181         if (count == 0 && ((urb->actual_length != 0) ||
1182                            (serial->rx_state == RX_PENDING))) {
1183                 serial->rx_state = RX_SENT;
1184                 hso_mux_serial_read(serial);
1185         } else
1186                 serial->rx_state = RX_IDLE;
1187 }
1188
1189
1190 /* read callback for Diag and CS port */
1191 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1192 {
1193         struct hso_serial *serial = urb->context;
1194         int status = urb->status;
1195
1196         /* sanity check */
1197         if (!serial) {
1198                 D1("serial == NULL");
1199                 return;
1200         } else if (status) {
1201                 log_usb_status(status, __func__);
1202                 return;
1203         }
1204
1205         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1206         D1("Actual length = %d\n", urb->actual_length);
1207         DUMP1(urb->transfer_buffer, urb->actual_length);
1208
1209         /* Anyone listening? */
1210         if (serial->open_count == 0)
1211                 return;
1212
1213         if (status == 0) {
1214                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1215                         u32 rest;
1216                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1217                         rest =
1218                             urb->actual_length %
1219                             serial->in_endp->wMaxPacketSize;
1220                         if (((rest == 5) || (rest == 6))
1221                             && !memcmp(((u8 *) urb->transfer_buffer) +
1222                                        urb->actual_length - 4, crc_check, 4)) {
1223                                 urb->actual_length -= 4;
1224                         }
1225                 }
1226                 /* Valid data, handle RX data */
1227                 spin_lock(&serial->serial_lock);
1228                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1229                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1230                 spin_unlock(&serial->serial_lock);
1231         } else if (status == -ENOENT || status == -ECONNRESET) {
1232                 /* Unlinked - check for throttled port. */
1233                 D2("Port %d, successfully unlinked urb", serial->minor);
1234                 spin_lock(&serial->serial_lock);
1235                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1236                 hso_resubmit_rx_bulk_urb(serial, urb);
1237                 spin_unlock(&serial->serial_lock);
1238         } else {
1239                 D2("Port %d, status = %d for read urb", serial->minor, status);
1240                 return;
1241         }
1242 }
1243
1244 /*
1245  * This needs to be a tasklet otherwise we will
1246  * end up recursively calling this function.
1247  */
1248 void hso_unthrottle_tasklet(struct hso_serial *serial)
1249 {
1250         unsigned long flags;
1251
1252         spin_lock_irqsave(&serial->serial_lock, flags);
1253         if ((serial->parent->port_spec & HSO_INTF_MUX))
1254                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1255         else
1256                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1257         spin_unlock_irqrestore(&serial->serial_lock, flags);
1258 }
1259
1260 static  void hso_unthrottle(struct tty_struct *tty)
1261 {
1262         struct hso_serial *serial = get_serial_by_tty(tty);
1263
1264         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1265 }
1266
1267 void hso_unthrottle_workfunc(struct work_struct *work)
1268 {
1269         struct hso_serial *serial =
1270             container_of(work, struct hso_serial,
1271                          retry_unthrottle_workqueue);
1272         hso_unthrottle_tasklet(serial);
1273 }
1274
1275 /* open the requested serial port */
1276 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1277 {
1278         struct hso_serial *serial = get_serial_by_index(tty->index);
1279         int result;
1280
1281         /* sanity check */
1282         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1283                 WARN_ON(1);
1284                 tty->driver_data = NULL;
1285                 D1("Failed to open port");
1286                 return -ENODEV;
1287         }
1288
1289         mutex_lock(&serial->parent->mutex);
1290         result = usb_autopm_get_interface(serial->parent->interface);
1291         if (result < 0)
1292                 goto err_out;
1293
1294         D1("Opening %d", serial->minor);
1295         kref_get(&serial->parent->ref);
1296
1297         /* setup */
1298         spin_lock_irq(&serial->serial_lock);
1299         tty->driver_data = serial;
1300         serial->tty = tty_kref_get(tty);
1301         spin_unlock_irq(&serial->serial_lock);
1302
1303         /* check for port already opened, if not set the termios */
1304         serial->open_count++;
1305         if (serial->open_count == 1) {
1306                 tty->low_latency = 1;
1307                 serial->rx_state = RX_IDLE;
1308                 /* Force default termio settings */
1309                 _hso_serial_set_termios(tty, NULL);
1310                 tasklet_init(&serial->unthrottle_tasklet,
1311                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1312                              (unsigned long)serial);
1313                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1314                           hso_unthrottle_workfunc);
1315                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1316                 if (result) {
1317                         hso_stop_serial_device(serial->parent);
1318                         serial->open_count--;
1319                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1320                 }
1321         } else {
1322                 D1("Port was already open");
1323         }
1324
1325         usb_autopm_put_interface(serial->parent->interface);
1326
1327         /* done */
1328         if (result)
1329                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1330 err_out:
1331         mutex_unlock(&serial->parent->mutex);
1332         return result;
1333 }
1334
1335 /* close the requested serial port */
1336 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1337 {
1338         struct hso_serial *serial = tty->driver_data;
1339         u8 usb_gone;
1340
1341         D1("Closing serial port");
1342
1343         /* Open failed, no close cleanup required */
1344         if (serial == NULL)
1345                 return;
1346
1347         mutex_lock(&serial->parent->mutex);
1348         usb_gone = serial->parent->usb_gone;
1349
1350         if (!usb_gone)
1351                 usb_autopm_get_interface(serial->parent->interface);
1352
1353         /* reset the rts and dtr */
1354         /* do the actual close */
1355         serial->open_count--;
1356         kref_put(&serial->parent->ref, hso_serial_ref_free);
1357         if (serial->open_count <= 0) {
1358                 serial->open_count = 0;
1359                 spin_lock_irq(&serial->serial_lock);
1360                 if (serial->tty == tty) {
1361                         serial->tty->driver_data = NULL;
1362                         serial->tty = NULL;
1363                         tty_kref_put(tty);
1364                 }
1365                 spin_unlock_irq(&serial->serial_lock);
1366                 if (!usb_gone)
1367                         hso_stop_serial_device(serial->parent);
1368                 tasklet_kill(&serial->unthrottle_tasklet);
1369                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1370         }
1371
1372         if (!usb_gone)
1373                 usb_autopm_put_interface(serial->parent->interface);
1374
1375         mutex_unlock(&serial->parent->mutex);
1376 }
1377
1378 /* close the requested serial port */
1379 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1380                             int count)
1381 {
1382         struct hso_serial *serial = get_serial_by_tty(tty);
1383         int space, tx_bytes;
1384         unsigned long flags;
1385
1386         /* sanity check */
1387         if (serial == NULL) {
1388                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1389                 return -ENODEV;
1390         }
1391
1392         spin_lock_irqsave(&serial->serial_lock, flags);
1393
1394         space = serial->tx_data_length - serial->tx_buffer_count;
1395         tx_bytes = (count < space) ? count : space;
1396
1397         if (!tx_bytes)
1398                 goto out;
1399
1400         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1401         serial->tx_buffer_count += tx_bytes;
1402
1403 out:
1404         spin_unlock_irqrestore(&serial->serial_lock, flags);
1405
1406         hso_kick_transmit(serial);
1407         /* done */
1408         return tx_bytes;
1409 }
1410
1411 /* how much room is there for writing */
1412 static int hso_serial_write_room(struct tty_struct *tty)
1413 {
1414         struct hso_serial *serial = get_serial_by_tty(tty);
1415         int room;
1416         unsigned long flags;
1417
1418         spin_lock_irqsave(&serial->serial_lock, flags);
1419         room = serial->tx_data_length - serial->tx_buffer_count;
1420         spin_unlock_irqrestore(&serial->serial_lock, flags);
1421
1422         /* return free room */
1423         return room;
1424 }
1425
1426 /* setup the term */
1427 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1428 {
1429         struct hso_serial *serial = get_serial_by_tty(tty);
1430         unsigned long flags;
1431
1432         if (old)
1433                 D5("Termios called with: cflags new[%d] - old[%d]",
1434                    tty->termios->c_cflag, old->c_cflag);
1435
1436         /* the actual setup */
1437         spin_lock_irqsave(&serial->serial_lock, flags);
1438         if (serial->open_count)
1439                 _hso_serial_set_termios(tty, old);
1440         else
1441                 tty->termios = old;
1442         spin_unlock_irqrestore(&serial->serial_lock, flags);
1443
1444         /* done */
1445         return;
1446 }
1447
1448 /* how many characters in the buffer */
1449 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1450 {
1451         struct hso_serial *serial = get_serial_by_tty(tty);
1452         int chars;
1453         unsigned long flags;
1454
1455         /* sanity check */
1456         if (serial == NULL)
1457                 return 0;
1458
1459         spin_lock_irqsave(&serial->serial_lock, flags);
1460         chars = serial->tx_buffer_count;
1461         spin_unlock_irqrestore(&serial->serial_lock, flags);
1462
1463         return chars;
1464 }
1465 int tiocmget_submit_urb(struct hso_serial *serial,
1466                         struct hso_tiocmget  *tiocmget,
1467                         struct usb_device *usb)
1468 {
1469         int result;
1470
1471         if (serial->parent->usb_gone)
1472                 return -ENODEV;
1473         usb_fill_int_urb(tiocmget->urb, usb,
1474                          usb_rcvintpipe(usb,
1475                                         tiocmget->endp->
1476                                         bEndpointAddress & 0x7F),
1477                          &tiocmget->serial_state_notification,
1478                          sizeof(struct hso_serial_state_notification),
1479                          tiocmget_intr_callback, serial,
1480                          tiocmget->endp->bInterval);
1481         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1482         if (result) {
1483                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1484                          result);
1485         }
1486         return result;
1487
1488 }
1489
1490 static void tiocmget_intr_callback(struct urb *urb)
1491 {
1492         struct hso_serial *serial = urb->context;
1493         struct hso_tiocmget *tiocmget;
1494         int status = urb->status;
1495         u16 UART_state_bitmap, prev_UART_state_bitmap;
1496         struct uart_icount *icount;
1497         struct hso_serial_state_notification *serial_state_notification;
1498         struct usb_device *usb;
1499
1500         /* Sanity checks */
1501         if (!serial)
1502                 return;
1503         if (status) {
1504                 log_usb_status(status, __func__);
1505                 return;
1506         }
1507         tiocmget = serial->tiocmget;
1508         if (!tiocmget)
1509                 return;
1510         usb = serial->parent->usb;
1511         serial_state_notification = &tiocmget->serial_state_notification;
1512         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1513             serial_state_notification->bNotification != B_NOTIFICATION ||
1514             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1515             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1516             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1517                 dev_warn(&usb->dev,
1518                          "hso received invalid serial state notification\n");
1519                 DUMP(serial_state_notification,
1520                      sizeof(hso_serial_state_notifation))
1521         } else {
1522
1523                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1524                                                 UART_state_bitmap);
1525                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1526                 icount = &tiocmget->icount;
1527                 spin_lock(&serial->serial_lock);
1528                 if ((UART_state_bitmap & B_OVERRUN) !=
1529                    (prev_UART_state_bitmap & B_OVERRUN))
1530                         icount->parity++;
1531                 if ((UART_state_bitmap & B_PARITY) !=
1532                    (prev_UART_state_bitmap & B_PARITY))
1533                         icount->parity++;
1534                 if ((UART_state_bitmap & B_FRAMING) !=
1535                    (prev_UART_state_bitmap & B_FRAMING))
1536                         icount->frame++;
1537                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1538                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1539                         icount->rng++;
1540                 if ((UART_state_bitmap & B_BREAK) !=
1541                    (prev_UART_state_bitmap & B_BREAK))
1542                         icount->brk++;
1543                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1544                    (prev_UART_state_bitmap & B_TX_CARRIER))
1545                         icount->dsr++;
1546                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1547                    (prev_UART_state_bitmap & B_RX_CARRIER))
1548                         icount->dcd++;
1549                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1550                 spin_unlock(&serial->serial_lock);
1551                 tiocmget->intr_completed = 1;
1552                 wake_up_interruptible(&tiocmget->waitq);
1553         }
1554         memset(serial_state_notification, 0,
1555                sizeof(struct hso_serial_state_notification));
1556         tiocmget_submit_urb(serial,
1557                             tiocmget,
1558                             serial->parent->usb);
1559 }
1560
1561 /*
1562  * next few functions largely stolen from drivers/serial/serial_core.c
1563  */
1564 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1565  * - mask passed in arg for lines of interest
1566  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1567  * Caller should use TIOCGICOUNT to see which one it was
1568  */
1569 static int
1570 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1571 {
1572         DECLARE_WAITQUEUE(wait, current);
1573         struct uart_icount cprev, cnow;
1574         struct hso_tiocmget  *tiocmget;
1575         int ret;
1576
1577         tiocmget = serial->tiocmget;
1578         if (!tiocmget)
1579                 return -ENOENT;
1580         /*
1581          * note the counters on entry
1582          */
1583         spin_lock_irq(&serial->serial_lock);
1584         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1585         spin_unlock_irq(&serial->serial_lock);
1586         add_wait_queue(&tiocmget->waitq, &wait);
1587         for (;;) {
1588                 spin_lock_irq(&serial->serial_lock);
1589                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1590                 spin_unlock_irq(&serial->serial_lock);
1591                 set_current_state(TASK_INTERRUPTIBLE);
1592                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1593                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1594                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1595                         ret = 0;
1596                         break;
1597                 }
1598                 schedule();
1599                 /* see if a signal did it */
1600                 if (signal_pending(current)) {
1601                         ret = -ERESTARTSYS;
1602                         break;
1603                 }
1604                 cprev = cnow;
1605         }
1606         current->state = TASK_RUNNING;
1607         remove_wait_queue(&tiocmget->waitq, &wait);
1608
1609         return ret;
1610 }
1611
1612 /*
1613  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1614  * Return: write counters to the user passed counter struct
1615  * NB: both 1->0 and 0->1 transitions are counted except for
1616  *     RI where only 0->1 is counted.
1617  */
1618 static int hso_get_count(struct hso_serial *serial,
1619                           struct serial_icounter_struct __user *icnt)
1620 {
1621         struct serial_icounter_struct icount;
1622         struct uart_icount cnow;
1623         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1624
1625         if (!tiocmget)
1626                  return -ENOENT;
1627         spin_lock_irq(&serial->serial_lock);
1628         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1629         spin_unlock_irq(&serial->serial_lock);
1630
1631         icount.cts         = cnow.cts;
1632         icount.dsr         = cnow.dsr;
1633         icount.rng         = cnow.rng;
1634         icount.dcd         = cnow.dcd;
1635         icount.rx          = cnow.rx;
1636         icount.tx          = cnow.tx;
1637         icount.frame       = cnow.frame;
1638         icount.overrun     = cnow.overrun;
1639         icount.parity      = cnow.parity;
1640         icount.brk         = cnow.brk;
1641         icount.buf_overrun = cnow.buf_overrun;
1642
1643         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1644 }
1645
1646
1647 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1648 {
1649         int retval;
1650         struct hso_serial *serial = get_serial_by_tty(tty);
1651         struct hso_tiocmget  *tiocmget;
1652         u16 UART_state_bitmap;
1653
1654         /* sanity check */
1655         if (!serial) {
1656                 D1("no tty structures");
1657                 return -EINVAL;
1658         }
1659         spin_lock_irq(&serial->serial_lock);
1660         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1661             ((serial->dtr_state) ? TIOCM_DTR : 0);
1662         tiocmget = serial->tiocmget;
1663         if (tiocmget) {
1664
1665                 UART_state_bitmap = le16_to_cpu(
1666                         tiocmget->prev_UART_state_bitmap);
1667                 if (UART_state_bitmap & B_RING_SIGNAL)
1668                         retval |=  TIOCM_RNG;
1669                 if (UART_state_bitmap & B_RX_CARRIER)
1670                         retval |=  TIOCM_CD;
1671                 if (UART_state_bitmap & B_TX_CARRIER)
1672                         retval |=  TIOCM_DSR;
1673         }
1674         spin_unlock_irq(&serial->serial_lock);
1675         return retval;
1676 }
1677
1678 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1679                                unsigned int set, unsigned int clear)
1680 {
1681         int val = 0;
1682         unsigned long flags;
1683         int if_num;
1684         struct hso_serial *serial = get_serial_by_tty(tty);
1685
1686         /* sanity check */
1687         if (!serial) {
1688                 D1("no tty structures");
1689                 return -EINVAL;
1690         }
1691         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1692
1693         spin_lock_irqsave(&serial->serial_lock, flags);
1694         if (set & TIOCM_RTS)
1695                 serial->rts_state = 1;
1696         if (set & TIOCM_DTR)
1697                 serial->dtr_state = 1;
1698
1699         if (clear & TIOCM_RTS)
1700                 serial->rts_state = 0;
1701         if (clear & TIOCM_DTR)
1702                 serial->dtr_state = 0;
1703
1704         if (serial->dtr_state)
1705                 val |= 0x01;
1706         if (serial->rts_state)
1707                 val |= 0x02;
1708
1709         spin_unlock_irqrestore(&serial->serial_lock, flags);
1710
1711         return usb_control_msg(serial->parent->usb,
1712                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1713                                0x21, val, if_num, NULL, 0,
1714                                USB_CTRL_SET_TIMEOUT);
1715 }
1716
1717 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1718                             unsigned int cmd, unsigned long arg)
1719 {
1720         struct hso_serial *serial =  get_serial_by_tty(tty);
1721         void __user *uarg = (void __user *)arg;
1722         int ret = 0;
1723         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1724
1725         if (!serial)
1726                 return -ENODEV;
1727         switch (cmd) {
1728         case TIOCMIWAIT:
1729                 ret = hso_wait_modem_status(serial, arg);
1730                 break;
1731
1732         case TIOCGICOUNT:
1733                 ret = hso_get_count(serial, uarg);
1734                 break;
1735         default:
1736                 ret = -ENOIOCTLCMD;
1737                 break;
1738         }
1739         return ret;
1740 }
1741
1742
1743 /* starts a transmit */
1744 static void hso_kick_transmit(struct hso_serial *serial)
1745 {
1746         u8 *temp;
1747         unsigned long flags;
1748         int res;
1749
1750         spin_lock_irqsave(&serial->serial_lock, flags);
1751         if (!serial->tx_buffer_count)
1752                 goto out;
1753
1754         if (serial->tx_urb_used)
1755                 goto out;
1756
1757         /* Wakeup USB interface if necessary */
1758         if (hso_get_activity(serial->parent) == -EAGAIN)
1759                 goto out;
1760
1761         /* Switch pointers around to avoid memcpy */
1762         temp = serial->tx_buffer;
1763         serial->tx_buffer = serial->tx_data;
1764         serial->tx_data = temp;
1765         serial->tx_data_count = serial->tx_buffer_count;
1766         serial->tx_buffer_count = 0;
1767
1768         /* If temp is set, it means we switched buffers */
1769         if (temp && serial->write_data) {
1770                 res = serial->write_data(serial);
1771                 if (res >= 0)
1772                         serial->tx_urb_used = 1;
1773         }
1774 out:
1775         spin_unlock_irqrestore(&serial->serial_lock, flags);
1776 }
1777
1778 /* make a request (for reading and writing data to muxed serial port) */
1779 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1780                               struct urb *ctrl_urb,
1781                               struct usb_ctrlrequest *ctrl_req,
1782                               u8 *ctrl_urb_data, u32 size)
1783 {
1784         int result;
1785         int pipe;
1786
1787         /* Sanity check */
1788         if (!serial || !ctrl_urb || !ctrl_req) {
1789                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1790                 return -EINVAL;
1791         }
1792
1793         /* initialize */
1794         ctrl_req->wValue = 0;
1795         ctrl_req->wIndex = hso_port_to_mux(port);
1796         ctrl_req->wLength = size;
1797
1798         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1799                 /* Reading command */
1800                 ctrl_req->bRequestType = USB_DIR_IN |
1801                                          USB_TYPE_OPTION_VENDOR |
1802                                          USB_RECIP_INTERFACE;
1803                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1804                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1805         } else {
1806                 /* Writing command */
1807                 ctrl_req->bRequestType = USB_DIR_OUT |
1808                                          USB_TYPE_OPTION_VENDOR |
1809                                          USB_RECIP_INTERFACE;
1810                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1811                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1812         }
1813         /* syslog */
1814         D2("%s command (%02x) len: %d, port: %d",
1815            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1816            ctrl_req->bRequestType, ctrl_req->wLength, port);
1817
1818         /* Load ctrl urb */
1819         ctrl_urb->transfer_flags = 0;
1820         usb_fill_control_urb(ctrl_urb,
1821                              serial->parent->usb,
1822                              pipe,
1823                              (u8 *) ctrl_req,
1824                              ctrl_urb_data, size, ctrl_callback, serial);
1825         /* Send it on merry way */
1826         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1827         if (result) {
1828                 dev_err(&ctrl_urb->dev->dev,
1829                         "%s failed submit ctrl_urb %d type %d", __func__,
1830                         result, type);
1831                 return result;
1832         }
1833
1834         /* done */
1835         return size;
1836 }
1837
1838 /* called by intr_callback when read occurs */
1839 static int hso_mux_serial_read(struct hso_serial *serial)
1840 {
1841         if (!serial)
1842                 return -EINVAL;
1843
1844         /* clean data */
1845         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1846         /* make the request */
1847
1848         if (serial->num_rx_urbs != 1) {
1849                 dev_err(&serial->parent->interface->dev,
1850                         "ERROR: mux'd reads with multiple buffers "
1851                         "not possible\n");
1852                 return 0;
1853         }
1854         return mux_device_request(serial,
1855                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1856                                   serial->parent->port_spec & HSO_PORT_MASK,
1857                                   serial->rx_urb[0],
1858                                   &serial->ctrl_req_rx,
1859                                   serial->rx_data[0], serial->rx_data_length);
1860 }
1861
1862 /* used for muxed serial port callback (muxed serial read) */
1863 static void intr_callback(struct urb *urb)
1864 {
1865         struct hso_shared_int *shared_int = urb->context;
1866         struct hso_serial *serial;
1867         unsigned char *port_req;
1868         int status = urb->status;
1869         int i;
1870
1871         usb_mark_last_busy(urb->dev);
1872
1873         /* sanity check */
1874         if (!shared_int)
1875                 return;
1876
1877         /* status check */
1878         if (status) {
1879                 log_usb_status(status, __func__);
1880                 return;
1881         }
1882         D4("\n--- Got intr callback 0x%02X ---", status);
1883
1884         /* what request? */
1885         port_req = urb->transfer_buffer;
1886         D4(" port_req = 0x%.2X\n", *port_req);
1887         /* loop over all muxed ports to find the one sending this */
1888         for (i = 0; i < 8; i++) {
1889                 /* max 8 channels on MUX */
1890                 if (*port_req & (1 << i)) {
1891                         serial = get_serial_by_shared_int_and_type(shared_int,
1892                                                                    (1 << i));
1893                         if (serial != NULL) {
1894                                 D1("Pending read interrupt on port %d\n", i);
1895                                 spin_lock(&serial->serial_lock);
1896                                 if (serial->rx_state == RX_IDLE) {
1897                                         /* Setup and send a ctrl req read on
1898                                          * port i */
1899                                 if (!serial->rx_urb_filled[0]) {
1900                                                 serial->rx_state = RX_SENT;
1901                                                 hso_mux_serial_read(serial);
1902                                         } else
1903                                                 serial->rx_state = RX_PENDING;
1904
1905                                 } else {
1906                                         D1("Already pending a read on "
1907                                            "port %d\n", i);
1908                                 }
1909                                 spin_unlock(&serial->serial_lock);
1910                         }
1911                 }
1912         }
1913         /* Resubmit interrupt urb */
1914         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1915 }
1916
1917 /* called for writing to muxed serial port */
1918 static int hso_mux_serial_write_data(struct hso_serial *serial)
1919 {
1920         if (NULL == serial)
1921                 return -EINVAL;
1922
1923         return mux_device_request(serial,
1924                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1925                                   serial->parent->port_spec & HSO_PORT_MASK,
1926                                   serial->tx_urb,
1927                                   &serial->ctrl_req_tx,
1928                                   serial->tx_data, serial->tx_data_count);
1929 }
1930
1931 /* write callback for Diag and CS port */
1932 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1933 {
1934         struct hso_serial *serial = urb->context;
1935         int status = urb->status;
1936         struct tty_struct *tty;
1937
1938         /* sanity check */
1939         if (!serial) {
1940                 D1("serial == NULL");
1941                 return;
1942         }
1943
1944         spin_lock(&serial->serial_lock);
1945         serial->tx_urb_used = 0;
1946         tty = tty_kref_get(serial->tty);
1947         spin_unlock(&serial->serial_lock);
1948         if (status) {
1949                 log_usb_status(status, __func__);
1950                 tty_kref_put(tty);
1951                 return;
1952         }
1953         hso_put_activity(serial->parent);
1954         if (tty) {
1955                 tty_wakeup(tty);
1956                 tty_kref_put(tty);
1957         }
1958         hso_kick_transmit(serial);
1959
1960         D1(" ");
1961         return;
1962 }
1963
1964 /* called for writing diag or CS serial port */
1965 static int hso_std_serial_write_data(struct hso_serial *serial)
1966 {
1967         int count = serial->tx_data_count;
1968         int result;
1969
1970         usb_fill_bulk_urb(serial->tx_urb,
1971                           serial->parent->usb,
1972                           usb_sndbulkpipe(serial->parent->usb,
1973                                           serial->out_endp->
1974                                           bEndpointAddress & 0x7F),
1975                           serial->tx_data, serial->tx_data_count,
1976                           hso_std_serial_write_bulk_callback, serial);
1977
1978         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1979         if (result) {
1980                 dev_warn(&serial->parent->usb->dev,
1981                          "Failed to submit urb - res %d\n", result);
1982                 return result;
1983         }
1984
1985         return count;
1986 }
1987
1988 /* callback after read or write on muxed serial port */
1989 static void ctrl_callback(struct urb *urb)
1990 {
1991         struct hso_serial *serial = urb->context;
1992         struct usb_ctrlrequest *req;
1993         int status = urb->status;
1994         struct tty_struct *tty;
1995
1996         /* sanity check */
1997         if (!serial)
1998                 return;
1999
2000         spin_lock(&serial->serial_lock);
2001         serial->tx_urb_used = 0;
2002         tty = tty_kref_get(serial->tty);
2003         spin_unlock(&serial->serial_lock);
2004         if (status) {
2005                 log_usb_status(status, __func__);
2006                 tty_kref_put(tty);
2007                 return;
2008         }
2009
2010         /* what request? */
2011         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2012         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2013         D4("Actual length of urb = %d\n", urb->actual_length);
2014         DUMP1(urb->transfer_buffer, urb->actual_length);
2015
2016         if (req->bRequestType ==
2017             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2018                 /* response to a read command */
2019                 serial->rx_urb_filled[0] = 1;
2020                 spin_lock(&serial->serial_lock);
2021                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2022                 spin_unlock(&serial->serial_lock);
2023         } else {
2024                 hso_put_activity(serial->parent);
2025                 if (tty)
2026                         tty_wakeup(tty);
2027                 /* response to a write command */
2028                 hso_kick_transmit(serial);
2029         }
2030         tty_kref_put(tty);
2031 }
2032
2033 /* handle RX data for serial port */
2034 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2035 {
2036         struct tty_struct *tty;
2037         int write_length_remaining = 0;
2038         int curr_write_len;
2039
2040         /* Sanity check */
2041         if (urb == NULL || serial == NULL) {
2042                 D1("serial = NULL");
2043                 return -2;
2044         }
2045
2046         spin_lock(&serial->serial_lock);
2047         tty = tty_kref_get(serial->tty);
2048         spin_unlock(&serial->serial_lock);
2049
2050         /* Push data to tty */
2051         if (tty) {
2052                 write_length_remaining = urb->actual_length -
2053                         serial->curr_rx_urb_offset;
2054                 D1("data to push to tty");
2055                 while (write_length_remaining) {
2056                         if (test_bit(TTY_THROTTLED, &tty->flags))
2057                                 return -1;
2058                         curr_write_len =  tty_insert_flip_string
2059                                 (tty, urb->transfer_buffer +
2060                                  serial->curr_rx_urb_offset,
2061                                  write_length_remaining);
2062                         serial->curr_rx_urb_offset += curr_write_len;
2063                         write_length_remaining -= curr_write_len;
2064                         tty_flip_buffer_push(tty);
2065                 }
2066         }
2067         if (write_length_remaining == 0) {
2068                 serial->curr_rx_urb_offset = 0;
2069                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2070         }
2071         tty_kref_put(tty);
2072         return write_length_remaining;
2073 }
2074
2075
2076 /* Base driver functions */
2077
2078 static void hso_log_port(struct hso_device *hso_dev)
2079 {
2080         char *port_type;
2081         char port_dev[20];
2082
2083         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2084         case HSO_PORT_CONTROL:
2085                 port_type = "Control";
2086                 break;
2087         case HSO_PORT_APP:
2088                 port_type = "Application";
2089                 break;
2090         case HSO_PORT_GPS:
2091                 port_type = "GPS";
2092                 break;
2093         case HSO_PORT_GPS_CONTROL:
2094                 port_type = "GPS control";
2095                 break;
2096         case HSO_PORT_APP2:
2097                 port_type = "Application2";
2098                 break;
2099         case HSO_PORT_PCSC:
2100                 port_type = "PCSC";
2101                 break;
2102         case HSO_PORT_DIAG:
2103                 port_type = "Diagnostic";
2104                 break;
2105         case HSO_PORT_DIAG2:
2106                 port_type = "Diagnostic2";
2107                 break;
2108         case HSO_PORT_MODEM:
2109                 port_type = "Modem";
2110                 break;
2111         case HSO_PORT_NETWORK:
2112                 port_type = "Network";
2113                 break;
2114         default:
2115                 port_type = "Unknown";
2116                 break;
2117         }
2118         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2119                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2120         } else
2121                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2122                         dev2ser(hso_dev)->minor);
2123
2124         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2125                 port_type, port_dev);
2126 }
2127
2128 static int hso_start_net_device(struct hso_device *hso_dev)
2129 {
2130         int i, result = 0;
2131         struct hso_net *hso_net = dev2net(hso_dev);
2132
2133         if (!hso_net)
2134                 return -ENODEV;
2135
2136         /* send URBs for all read buffers */
2137         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2138
2139                 /* Prep a receive URB */
2140                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2141                                   hso_dev->usb,
2142                                   usb_rcvbulkpipe(hso_dev->usb,
2143                                                   hso_net->in_endp->
2144                                                   bEndpointAddress & 0x7F),
2145                                   hso_net->mux_bulk_rx_buf_pool[i],
2146                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2147                                   hso_net);
2148
2149                 /* Put it out there so the device can send us stuff */
2150                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2151                                         GFP_NOIO);
2152                 if (result)
2153                         dev_warn(&hso_dev->usb->dev,
2154                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2155                                 i, result);
2156         }
2157
2158         return result;
2159 }
2160
2161 static int hso_stop_net_device(struct hso_device *hso_dev)
2162 {
2163         int i;
2164         struct hso_net *hso_net = dev2net(hso_dev);
2165
2166         if (!hso_net)
2167                 return -ENODEV;
2168
2169         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2170                 if (hso_net->mux_bulk_rx_urb_pool[i])
2171                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2172
2173         }
2174         if (hso_net->mux_bulk_tx_urb)
2175                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2176
2177         return 0;
2178 }
2179
2180 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2181 {
2182         int i, result = 0;
2183         struct hso_serial *serial = dev2ser(hso_dev);
2184
2185         if (!serial)
2186                 return -ENODEV;
2187
2188         /* If it is not the MUX port fill in and submit a bulk urb (already
2189          * allocated in hso_serial_start) */
2190         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2191                 for (i = 0; i < serial->num_rx_urbs; i++) {
2192                         usb_fill_bulk_urb(serial->rx_urb[i],
2193                                           serial->parent->usb,
2194                                           usb_rcvbulkpipe(serial->parent->usb,
2195                                                           serial->in_endp->
2196                                                           bEndpointAddress &
2197                                                           0x7F),
2198                                           serial->rx_data[i],
2199                                           serial->rx_data_length,
2200                                           hso_std_serial_read_bulk_callback,
2201                                           serial);
2202                         result = usb_submit_urb(serial->rx_urb[i], flags);
2203                         if (result) {
2204                                 dev_warn(&serial->parent->usb->dev,
2205                                          "Failed to submit urb - res %d\n",
2206                                          result);
2207                                 break;
2208                         }
2209                 }
2210         } else {
2211                 mutex_lock(&serial->shared_int->shared_int_lock);
2212                 if (!serial->shared_int->use_count) {
2213                         result =
2214                             hso_mux_submit_intr_urb(serial->shared_int,
2215                                                     hso_dev->usb, flags);
2216                 }
2217                 serial->shared_int->use_count++;
2218                 mutex_unlock(&serial->shared_int->shared_int_lock);
2219         }
2220         if (serial->tiocmget)
2221                 tiocmget_submit_urb(serial,
2222                                     serial->tiocmget,
2223                                     serial->parent->usb);
2224         return result;
2225 }
2226
2227 static int hso_stop_serial_device(struct hso_device *hso_dev)
2228 {
2229         int i;
2230         struct hso_serial *serial = dev2ser(hso_dev);
2231         struct hso_tiocmget  *tiocmget;
2232
2233         if (!serial)
2234                 return -ENODEV;
2235
2236         for (i = 0; i < serial->num_rx_urbs; i++) {
2237                 if (serial->rx_urb[i]) {
2238                                 usb_kill_urb(serial->rx_urb[i]);
2239                                 serial->rx_urb_filled[i] = 0;
2240                 }
2241         }
2242         serial->curr_rx_urb_idx = 0;
2243         serial->curr_rx_urb_offset = 0;
2244
2245         if (serial->tx_urb)
2246                 usb_kill_urb(serial->tx_urb);
2247
2248         if (serial->shared_int) {
2249                 mutex_lock(&serial->shared_int->shared_int_lock);
2250                 if (serial->shared_int->use_count &&
2251                     (--serial->shared_int->use_count == 0)) {
2252                         struct urb *urb;
2253
2254                         urb = serial->shared_int->shared_intr_urb;
2255                         if (urb)
2256                                 usb_kill_urb(urb);
2257                 }
2258                 mutex_unlock(&serial->shared_int->shared_int_lock);
2259         }
2260         tiocmget = serial->tiocmget;
2261         if (tiocmget) {
2262                 wake_up_interruptible(&tiocmget->waitq);
2263                 usb_kill_urb(tiocmget->urb);
2264         }
2265
2266         return 0;
2267 }
2268
2269 static void hso_serial_common_free(struct hso_serial *serial)
2270 {
2271         int i;
2272
2273         if (serial->parent->dev)
2274                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2275
2276         tty_unregister_device(tty_drv, serial->minor);
2277
2278         for (i = 0; i < serial->num_rx_urbs; i++) {
2279                 /* unlink and free RX URB */
2280                 usb_free_urb(serial->rx_urb[i]);
2281                 /* free the RX buffer */
2282                 kfree(serial->rx_data[i]);
2283         }
2284
2285         /* unlink and free TX URB */
2286         usb_free_urb(serial->tx_urb);
2287         kfree(serial->tx_data);
2288 }
2289
2290 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2291                                     int rx_size, int tx_size)
2292 {
2293         struct device *dev;
2294         int minor;
2295         int i;
2296
2297         minor = get_free_serial_index();
2298         if (minor < 0)
2299                 goto exit;
2300
2301         /* register our minor number */
2302         serial->parent->dev = tty_register_device(tty_drv, minor,
2303                                         &serial->parent->interface->dev);
2304         dev = serial->parent->dev;
2305         dev->driver_data = serial->parent;
2306         i = device_create_file(dev, &dev_attr_hsotype);
2307
2308         /* fill in specific data for later use */
2309         serial->minor = minor;
2310         serial->magic = HSO_SERIAL_MAGIC;
2311         spin_lock_init(&serial->serial_lock);
2312         serial->num_rx_urbs = num_urbs;
2313
2314         /* RX, allocate urb and initialize */
2315
2316         /* prepare our RX buffer */
2317         serial->rx_data_length = rx_size;
2318         for (i = 0; i < serial->num_rx_urbs; i++) {
2319                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2320                 if (!serial->rx_urb[i]) {
2321                         dev_err(dev, "Could not allocate urb?\n");
2322                         goto exit;
2323                 }
2324                 serial->rx_urb[i]->transfer_buffer = NULL;
2325                 serial->rx_urb[i]->transfer_buffer_length = 0;
2326                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2327                                              GFP_KERNEL);
2328                 if (!serial->rx_data[i]) {
2329                         dev_err(dev, "%s - Out of memory\n", __func__);
2330                         goto exit;
2331                 }
2332         }
2333
2334         /* TX, allocate urb and initialize */
2335         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2336         if (!serial->tx_urb) {
2337                 dev_err(dev, "Could not allocate urb?\n");
2338                 goto exit;
2339         }
2340         serial->tx_urb->transfer_buffer = NULL;
2341         serial->tx_urb->transfer_buffer_length = 0;
2342         /* prepare our TX buffer */
2343         serial->tx_data_count = 0;
2344         serial->tx_buffer_count = 0;
2345         serial->tx_data_length = tx_size;
2346         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2347         if (!serial->tx_data) {
2348                 dev_err(dev, "%s - Out of memory", __func__);
2349                 goto exit;
2350         }
2351         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2352         if (!serial->tx_buffer) {
2353                 dev_err(dev, "%s - Out of memory", __func__);
2354                 goto exit;
2355         }
2356
2357         return 0;
2358 exit:
2359         hso_serial_common_free(serial);
2360         return -1;
2361 }
2362
2363 /* Frees a general hso device */
2364 static void hso_free_device(struct hso_device *hso_dev)
2365 {
2366         kfree(hso_dev);
2367 }
2368
2369 /* Creates a general hso device */
2370 static struct hso_device *hso_create_device(struct usb_interface *intf,
2371                                             int port_spec)
2372 {
2373         struct hso_device *hso_dev;
2374
2375         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2376         if (!hso_dev)
2377                 return NULL;
2378
2379         hso_dev->port_spec = port_spec;
2380         hso_dev->usb = interface_to_usbdev(intf);
2381         hso_dev->interface = intf;
2382         kref_init(&hso_dev->ref);
2383         mutex_init(&hso_dev->mutex);
2384
2385         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2386         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2387
2388         return hso_dev;
2389 }
2390
2391 /* Removes a network device in the network device table */
2392 static int remove_net_device(struct hso_device *hso_dev)
2393 {
2394         int i;
2395
2396         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2397                 if (network_table[i] == hso_dev) {
2398                         network_table[i] = NULL;
2399                         break;
2400                 }
2401         }
2402         if (i == HSO_MAX_NET_DEVICES)
2403                 return -1;
2404         return 0;
2405 }
2406
2407 /* Frees our network device */
2408 static void hso_free_net_device(struct hso_device *hso_dev)
2409 {
2410         int i;
2411         struct hso_net *hso_net = dev2net(hso_dev);
2412
2413         if (!hso_net)
2414                 return;
2415
2416         /* start freeing */
2417         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2418                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2419                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2420         }
2421         usb_free_urb(hso_net->mux_bulk_tx_urb);
2422         kfree(hso_net->mux_bulk_tx_buf);
2423
2424         remove_net_device(hso_net->parent);
2425
2426         if (hso_net->net) {
2427                 unregister_netdev(hso_net->net);
2428                 free_netdev(hso_net->net);
2429         }
2430
2431         hso_free_device(hso_dev);
2432 }
2433
2434 /* initialize the network interface */
2435 static void hso_net_init(struct net_device *net)
2436 {
2437         struct hso_net *hso_net = netdev_priv(net);
2438
2439         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2440
2441         /* fill in the other fields */
2442         net->open = hso_net_open;
2443         net->stop = hso_net_close;
2444         net->hard_start_xmit = hso_net_start_xmit;
2445         net->tx_timeout = hso_net_tx_timeout;
2446         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2447         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2448         net->type = ARPHRD_NONE;
2449         net->mtu = DEFAULT_MTU - 14;
2450         net->tx_queue_len = 10;
2451         SET_ETHTOOL_OPS(net, &ops);
2452
2453         /* and initialize the semaphore */
2454         spin_lock_init(&hso_net->net_lock);
2455 }
2456
2457 /* Adds a network device in the network device table */
2458 static int add_net_device(struct hso_device *hso_dev)
2459 {
2460         int i;
2461
2462         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2463                 if (network_table[i] == NULL) {
2464                         network_table[i] = hso_dev;
2465                         break;
2466                 }
2467         }
2468         if (i == HSO_MAX_NET_DEVICES)
2469                 return -1;
2470         return 0;
2471 }
2472
2473 static int hso_radio_toggle(void *data, enum rfkill_state state)
2474 {
2475         struct hso_device *hso_dev = data;
2476         int enabled = (state == RFKILL_STATE_ON);
2477         int rv;
2478
2479         mutex_lock(&hso_dev->mutex);
2480         if (hso_dev->usb_gone)
2481                 rv = 0;
2482         else
2483                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2484                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2485                                        USB_CTRL_SET_TIMEOUT);
2486         mutex_unlock(&hso_dev->mutex);
2487         return rv;
2488 }
2489
2490 /* Creates and sets up everything for rfkill */
2491 static void hso_create_rfkill(struct hso_device *hso_dev,
2492                              struct usb_interface *interface)
2493 {
2494         struct hso_net *hso_net = dev2net(hso_dev);
2495         struct device *dev = &hso_net->net->dev;
2496         char *rfkn;
2497
2498         hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2499                                  RFKILL_TYPE_WWAN);
2500         if (!hso_net->rfkill) {
2501                 dev_err(dev, "%s - Out of memory\n", __func__);
2502                 return;
2503         }
2504         rfkn = kzalloc(20, GFP_KERNEL);
2505         if (!rfkn) {
2506                 rfkill_free(hso_net->rfkill);
2507                 hso_net->rfkill = NULL;
2508                 dev_err(dev, "%s - Out of memory\n", __func__);
2509                 return;
2510         }
2511         snprintf(rfkn, 20, "hso-%d",
2512                  interface->altsetting->desc.bInterfaceNumber);
2513         hso_net->rfkill->name = rfkn;
2514         hso_net->rfkill->state = RFKILL_STATE_ON;
2515         hso_net->rfkill->data = hso_dev;
2516         hso_net->rfkill->toggle_radio = hso_radio_toggle;
2517         if (rfkill_register(hso_net->rfkill) < 0) {
2518                 kfree(rfkn);
2519                 hso_net->rfkill->name = NULL;
2520                 rfkill_free(hso_net->rfkill);
2521                 hso_net->rfkill = NULL;
2522                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2523                 return;
2524         }
2525 }
2526
2527 /* Creates our network device */
2528 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2529 {
2530         int result, i;
2531         struct net_device *net;
2532         struct hso_net *hso_net;
2533         struct hso_device *hso_dev;
2534
2535         hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2536         if (!hso_dev)
2537                 return NULL;
2538
2539         /* allocate our network device, then we can put in our private data */
2540         /* call hso_net_init to do the basic initialization */
2541         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2542         if (!net) {
2543                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2544                 goto exit;
2545         }
2546
2547         hso_net = netdev_priv(net);
2548
2549         hso_dev->port_data.dev_net = hso_net;
2550         hso_net->net = net;
2551         hso_net->parent = hso_dev;
2552
2553         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2554                                       USB_DIR_IN);
2555         if (!hso_net->in_endp) {
2556                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2557                 goto exit;
2558         }
2559         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2560                                        USB_DIR_OUT);
2561         if (!hso_net->out_endp) {
2562                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2563                 goto exit;
2564         }
2565         SET_NETDEV_DEV(net, &interface->dev);
2566
2567         /* registering our net device */
2568         result = register_netdev(net);
2569         if (result) {
2570                 dev_err(&interface->dev, "Failed to register device\n");
2571                 goto exit;
2572         }
2573
2574         /* start allocating */
2575         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2576                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2577                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2578                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2579                         goto exit;
2580                 }
2581                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2582                                                            GFP_KERNEL);
2583                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2584                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2585                         goto exit;
2586                 }
2587         }
2588         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2589         if (!hso_net->mux_bulk_tx_urb) {
2590                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2591                 goto exit;
2592         }
2593         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2594         if (!hso_net->mux_bulk_tx_buf) {
2595                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2596                 goto exit;
2597         }
2598
2599         add_net_device(hso_dev);
2600
2601         hso_log_port(hso_dev);
2602
2603         hso_create_rfkill(hso_dev, interface);
2604
2605         return hso_dev;
2606 exit:
2607         hso_free_net_device(hso_dev);
2608         return NULL;
2609 }
2610
2611 static void hso_free_tiomget(struct hso_serial *serial)
2612 {
2613         struct hso_tiocmget *tiocmget = serial->tiocmget;
2614         if (tiocmget) {
2615                 kfree(tiocmget);
2616                 if (tiocmget->urb) {
2617                         usb_free_urb(tiocmget->urb);
2618                         tiocmget->urb = NULL;
2619                 }
2620                 serial->tiocmget = NULL;
2621
2622         }
2623 }
2624
2625 /* Frees an AT channel ( goes for both mux and non-mux ) */
2626 static void hso_free_serial_device(struct hso_device *hso_dev)
2627 {
2628         struct hso_serial *serial = dev2ser(hso_dev);
2629
2630         if (!serial)
2631                 return;
2632         set_serial_by_index(serial->minor, NULL);
2633
2634         hso_serial_common_free(serial);
2635
2636         if (serial->shared_int) {
2637                 mutex_lock(&serial->shared_int->shared_int_lock);
2638                 if (--serial->shared_int->ref_count == 0)
2639                         hso_free_shared_int(serial->shared_int);
2640                 else
2641                         mutex_unlock(&serial->shared_int->shared_int_lock);
2642         }
2643         hso_free_tiomget(serial);
2644         kfree(serial);
2645         hso_free_device(hso_dev);
2646 }
2647
2648 /* Creates a bulk AT channel */
2649 static struct hso_device *hso_create_bulk_serial_device(
2650                         struct usb_interface *interface, int port)
2651 {
2652         struct hso_device *hso_dev;
2653         struct hso_serial *serial;
2654         int num_urbs;
2655         struct hso_tiocmget *tiocmget;
2656
2657         hso_dev = hso_create_device(interface, port);
2658         if (!hso_dev)
2659                 return NULL;
2660
2661         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2662         if (!serial)
2663                 goto exit;
2664
2665         serial->parent = hso_dev;
2666         hso_dev->port_data.dev_serial = serial;
2667
2668         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2669                 num_urbs = 2;
2670                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2671                                            GFP_KERNEL);
2672                 /* it isn't going to break our heart if serial->tiocmget
2673                  *  allocation fails don't bother checking this.
2674                  */
2675                 if (serial->tiocmget) {
2676                         tiocmget = serial->tiocmget;
2677                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2678                         if (tiocmget->urb) {
2679                                 mutex_init(&tiocmget->mutex);
2680                                 init_waitqueue_head(&tiocmget->waitq);
2681                                 tiocmget->endp = hso_get_ep(
2682                                         interface,
2683                                         USB_ENDPOINT_XFER_INT,
2684                                         USB_DIR_IN);
2685                         } else
2686                                 hso_free_tiomget(serial);
2687                 }
2688         }
2689         else
2690                 num_urbs = 1;
2691
2692         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2693                                      BULK_URB_TX_SIZE))
2694                 goto exit;
2695
2696         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2697                                      USB_DIR_IN);
2698         if (!serial->in_endp) {
2699                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2700                 goto exit2;
2701         }
2702
2703         if (!
2704             (serial->out_endp =
2705              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2706                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2707                 goto exit2;
2708         }
2709
2710         serial->write_data = hso_std_serial_write_data;
2711
2712         /* and record this serial */
2713         set_serial_by_index(serial->minor, serial);
2714
2715         /* setup the proc dirs and files if needed */
2716         hso_log_port(hso_dev);
2717
2718         /* done, return it */
2719         return hso_dev;
2720
2721 exit2:
2722         hso_serial_common_free(serial);
2723 exit:
2724         hso_free_tiomget(serial);
2725         kfree(serial);
2726         hso_free_device(hso_dev);
2727         return NULL;
2728 }
2729
2730 /* Creates a multiplexed AT channel */
2731 static
2732 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2733                                                 int port,
2734                                                 struct hso_shared_int *mux)
2735 {
2736         struct hso_device *hso_dev;
2737         struct hso_serial *serial;
2738         int port_spec;
2739
2740         port_spec = HSO_INTF_MUX;
2741         port_spec &= ~HSO_PORT_MASK;
2742
2743         port_spec |= hso_mux_to_port(port);
2744         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2745                 return NULL;
2746
2747         hso_dev = hso_create_device(interface, port_spec);
2748         if (!hso_dev)
2749                 return NULL;
2750
2751         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2752         if (!serial)
2753                 goto exit;
2754
2755         hso_dev->port_data.dev_serial = serial;
2756         serial->parent = hso_dev;
2757
2758         if (hso_serial_common_create
2759             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2760                 goto exit;
2761
2762         serial->tx_data_length--;
2763         serial->write_data = hso_mux_serial_write_data;
2764
2765         serial->shared_int = mux;
2766         mutex_lock(&serial->shared_int->shared_int_lock);
2767         serial->shared_int->ref_count++;
2768         mutex_unlock(&serial->shared_int->shared_int_lock);
2769
2770         /* and record this serial */
2771         set_serial_by_index(serial->minor, serial);
2772
2773         /* setup the proc dirs and files if needed */
2774         hso_log_port(hso_dev);
2775
2776         /* done, return it */
2777         return hso_dev;
2778
2779 exit:
2780         if (serial) {
2781                 tty_unregister_device(tty_drv, serial->minor);
2782                 kfree(serial);
2783         }
2784         if (hso_dev)
2785                 hso_free_device(hso_dev);
2786         return NULL;
2787
2788 }
2789
2790 static void hso_free_shared_int(struct hso_shared_int *mux)
2791 {
2792         usb_free_urb(mux->shared_intr_urb);
2793         kfree(mux->shared_intr_buf);
2794         mutex_unlock(&mux->shared_int_lock);
2795         kfree(mux);
2796 }
2797
2798 static
2799 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2800 {
2801         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2802
2803         if (!mux)
2804                 return NULL;
2805
2806         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2807                                     USB_DIR_IN);
2808         if (!mux->intr_endp) {
2809                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2810                 goto exit;
2811         }
2812
2813         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2814         if (!mux->shared_intr_urb) {
2815                 dev_err(&interface->dev, "Could not allocate intr urb?");
2816                 goto exit;
2817         }
2818         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2819                                        GFP_KERNEL);
2820         if (!mux->shared_intr_buf) {
2821                 dev_err(&interface->dev, "Could not allocate intr buf?");
2822                 goto exit;
2823         }
2824
2825         mutex_init(&mux->shared_int_lock);
2826
2827         return mux;
2828
2829 exit:
2830         kfree(mux->shared_intr_buf);
2831         usb_free_urb(mux->shared_intr_urb);
2832         kfree(mux);
2833         return NULL;
2834 }
2835
2836 /* Gets the port spec for a certain interface */
2837 static int hso_get_config_data(struct usb_interface *interface)
2838 {
2839         struct usb_device *usbdev = interface_to_usbdev(interface);
2840         u8 config_data[17];
2841         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2842         s32 result;
2843
2844         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2845                             0x86, 0xC0, 0, 0, config_data, 17,
2846                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2847                 return -EIO;
2848         }
2849
2850         switch (config_data[if_num]) {
2851         case 0x0:
2852                 result = 0;
2853                 break;
2854         case 0x1:
2855                 result = HSO_PORT_DIAG;
2856                 break;
2857         case 0x2:
2858                 result = HSO_PORT_GPS;
2859                 break;
2860         case 0x3:
2861                 result = HSO_PORT_GPS_CONTROL;
2862                 break;
2863         case 0x4:
2864                 result = HSO_PORT_APP;
2865                 break;
2866         case 0x5:
2867                 result = HSO_PORT_APP2;
2868                 break;
2869         case 0x6:
2870                 result = HSO_PORT_CONTROL;
2871                 break;
2872         case 0x7:
2873                 result = HSO_PORT_NETWORK;
2874                 break;
2875         case 0x8:
2876                 result = HSO_PORT_MODEM;
2877                 break;
2878         case 0x9:
2879                 result = HSO_PORT_MSD;
2880                 break;
2881         case 0xa:
2882                 result = HSO_PORT_PCSC;
2883                 break;
2884         case 0xb:
2885                 result = HSO_PORT_VOICE;
2886                 break;
2887         default:
2888                 result = 0;
2889         }
2890
2891         if (result)
2892                 result |= HSO_INTF_BULK;
2893
2894         if (config_data[16] & 0x1)
2895                 result |= HSO_INFO_CRC_BUG;
2896
2897         return result;
2898 }
2899
2900 /* called once for each interface upon device insertion */
2901 static int hso_probe(struct usb_interface *interface,
2902                      const struct usb_device_id *id)
2903 {
2904         int mux, i, if_num, port_spec;
2905         unsigned char port_mask;
2906         struct hso_device *hso_dev = NULL;
2907         struct hso_shared_int *shared_int;
2908         struct hso_device *tmp_dev = NULL;
2909
2910         if_num = interface->altsetting->desc.bInterfaceNumber;
2911
2912         /* Get the interface/port specification from either driver_info or from
2913          * the device itself */
2914         if (id->driver_info)
2915                 port_spec = ((u32 *)(id->driver_info))[if_num];
2916         else
2917                 port_spec = hso_get_config_data(interface);
2918
2919         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2920                 dev_err(&interface->dev, "Not our interface\n");
2921                 return -ENODEV;
2922         }
2923         /* Check if we need to switch to alt interfaces prior to port
2924          * configuration */
2925         if (interface->num_altsetting > 1)
2926                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2927         interface->needs_remote_wakeup = 1;
2928
2929         /* Allocate new hso device(s) */
2930         switch (port_spec & HSO_INTF_MASK) {
2931         case HSO_INTF_MUX:
2932                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2933                         /* Create the network device */
2934                         if (!disable_net) {
2935                                 hso_dev = hso_create_net_device(interface);
2936                                 if (!hso_dev)
2937                                         goto exit;
2938                                 tmp_dev = hso_dev;
2939                         }
2940                 }
2941
2942                 if (hso_get_mux_ports(interface, &port_mask))
2943                         /* TODO: de-allocate everything */
2944                         goto exit;
2945
2946                 shared_int = hso_create_shared_int(interface);
2947                 if (!shared_int)
2948                         goto exit;
2949
2950                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2951                         if (port_mask & i) {
2952                                 hso_dev = hso_create_mux_serial_device(
2953                                                 interface, i, shared_int);
2954                                 if (!hso_dev)
2955                                         goto exit;
2956                         }
2957                 }
2958
2959                 if (tmp_dev)
2960                         hso_dev = tmp_dev;
2961                 break;
2962
2963         case HSO_INTF_BULK:
2964                 /* It's a regular bulk interface */
2965                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2966                     && !disable_net)
2967                         hso_dev = hso_create_net_device(interface);
2968                 else
2969                         hso_dev =
2970                             hso_create_bulk_serial_device(interface, port_spec);
2971                 if (!hso_dev)
2972                         goto exit;
2973                 break;
2974         default:
2975                 goto exit;
2976         }
2977
2978         usb_driver_claim_interface(&hso_driver, interface, hso_dev);
2979
2980         /* save our data pointer in this device */
2981         usb_set_intfdata(interface, hso_dev);
2982
2983         /* done */
2984         return 0;
2985 exit:
2986         hso_free_interface(interface);
2987         return -ENODEV;
2988 }
2989
2990 /* device removed, cleaning up */
2991 static void hso_disconnect(struct usb_interface *interface)
2992 {
2993         hso_free_interface(interface);
2994
2995         /* remove reference of our private data */
2996         usb_set_intfdata(interface, NULL);
2997
2998         usb_driver_release_interface(&hso_driver, interface);
2999 }
3000
3001 static void async_get_intf(struct work_struct *data)
3002 {
3003         struct hso_device *hso_dev =
3004             container_of(data, struct hso_device, async_get_intf);
3005         usb_autopm_get_interface(hso_dev->interface);
3006 }
3007
3008 static void async_put_intf(struct work_struct *data)
3009 {
3010         struct hso_device *hso_dev =
3011             container_of(data, struct hso_device, async_put_intf);
3012         usb_autopm_put_interface(hso_dev->interface);
3013 }
3014
3015 static int hso_get_activity(struct hso_device *hso_dev)
3016 {
3017         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3018                 if (!hso_dev->is_active) {
3019                         hso_dev->is_active = 1;
3020                         schedule_work(&hso_dev->async_get_intf);
3021                 }
3022         }
3023
3024         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3025                 return -EAGAIN;
3026
3027         usb_mark_last_busy(hso_dev->usb);
3028
3029         return 0;
3030 }
3031
3032 static int hso_put_activity(struct hso_device *hso_dev)
3033 {
3034         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3035                 if (hso_dev->is_active) {
3036                         hso_dev->is_active = 0;
3037                         schedule_work(&hso_dev->async_put_intf);
3038                         return -EAGAIN;
3039                 }
3040         }
3041         hso_dev->is_active = 0;
3042         return 0;
3043 }
3044
3045 /* called by kernel when we need to suspend device */
3046 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3047 {
3048         int i, result;
3049
3050         /* Stop all serial ports */
3051         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3052                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3053                         result = hso_stop_serial_device(serial_table[i]);
3054                         if (result)
3055                                 goto out;
3056                 }
3057         }
3058
3059         /* Stop all network ports */
3060         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3061                 if (network_table[i] &&
3062                     (network_table[i]->interface == iface)) {
3063                         result = hso_stop_net_device(network_table[i]);
3064                         if (result)
3065                                 goto out;
3066                 }
3067         }
3068
3069 out:
3070         return 0;
3071 }
3072
3073 /* called by kernel when we need to resume device */
3074 static int hso_resume(struct usb_interface *iface)
3075 {
3076         int i, result = 0;
3077         struct hso_net *hso_net;
3078
3079         /* Start all serial ports */
3080         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3081                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3082                         if (dev2ser(serial_table[i])->open_count) {
3083                                 result =
3084                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3085                                 hso_kick_transmit(dev2ser(serial_table[i]));
3086                                 if (result)
3087                                         goto out;
3088                         }
3089                 }
3090         }
3091
3092         /* Start all network ports */
3093         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3094                 if (network_table[i] &&
3095                     (network_table[i]->interface == iface)) {
3096                         hso_net = dev2net(network_table[i]);
3097                         if (hso_net->flags & IFF_UP) {
3098                                 /* First transmit any lingering data,
3099                                    then restart the device. */
3100                                 if (hso_net->skb_tx_buf) {
3101                                         dev_dbg(&iface->dev,
3102                                                 "Transmitting"
3103                                                 " lingering data\n");
3104                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3105                                                            hso_net->net);
3106                                         hso_net->skb_tx_buf = NULL;
3107                                 }
3108                                 result = hso_start_net_device(network_table[i]);
3109                                 if (result)
3110                                         goto out;
3111                         }
3112                 }
3113         }
3114
3115 out:
3116         return result;
3117 }
3118
3119 static void hso_serial_ref_free(struct kref *ref)
3120 {
3121         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3122
3123         hso_free_serial_device(hso_dev);
3124 }
3125
3126 static void hso_free_interface(struct usb_interface *interface)
3127 {
3128         struct hso_serial *hso_dev;
3129         struct tty_struct *tty;
3130         int i;
3131
3132         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3133                 if (serial_table[i]
3134                     && (serial_table[i]->interface == interface)) {
3135                         hso_dev = dev2ser(serial_table[i]);
3136                         spin_lock_irq(&hso_dev->serial_lock);
3137                         tty = tty_kref_get(hso_dev->tty);
3138                         spin_unlock_irq(&hso_dev->serial_lock);
3139                         if (tty)
3140                                 tty_hangup(tty);
3141                         mutex_lock(&hso_dev->parent->mutex);
3142                         tty_kref_put(tty);
3143                         hso_dev->parent->usb_gone = 1;
3144                         mutex_unlock(&hso_dev->parent->mutex);
3145                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3146                 }
3147         }
3148
3149         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3150                 if (network_table[i]
3151                     && (network_table[i]->interface == interface)) {
3152                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3153                         /* hso_stop_net_device doesn't stop the net queue since
3154                          * traffic needs to start it again when suspended */
3155                         netif_stop_queue(dev2net(network_table[i])->net);
3156                         hso_stop_net_device(network_table[i]);
3157                         cancel_work_sync(&network_table[i]->async_put_intf);
3158                         cancel_work_sync(&network_table[i]->async_get_intf);
3159                         if (rfk)
3160                                 rfkill_unregister(rfk);
3161                         hso_free_net_device(network_table[i]);
3162                 }
3163         }
3164 }
3165
3166 /* Helper functions */
3167
3168 /* Get the endpoint ! */
3169 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3170                                                   int type, int dir)
3171 {
3172         int i;
3173         struct usb_host_interface *iface = intf->cur_altsetting;
3174         struct usb_endpoint_descriptor *endp;
3175
3176         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3177                 endp = &iface->endpoint[i].desc;
3178                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3179                     (usb_endpoint_type(endp) == type))
3180                         return endp;
3181         }
3182
3183         return NULL;
3184 }
3185
3186 /* Get the byte that describes which ports are enabled */
3187 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3188 {
3189         int i;
3190         struct usb_host_interface *iface = intf->cur_altsetting;
3191
3192         if (iface->extralen == 3) {
3193                 *ports = iface->extra[2];
3194                 return 0;
3195         }
3196
3197         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3198                 if (iface->endpoint[i].extralen == 3) {
3199                         *ports = iface->endpoint[i].extra[2];
3200                         return 0;
3201                 }
3202         }
3203
3204         return -1;
3205 }
3206
3207 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3208 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3209                                    struct usb_device *usb, gfp_t gfp)
3210 {
3211         int result;
3212
3213         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3214                          usb_rcvintpipe(usb,
3215                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3216                          shared_int->shared_intr_buf,
3217                          shared_int->intr_endp->wMaxPacketSize,
3218                          intr_callback, shared_int,
3219                          shared_int->intr_endp->bInterval);
3220
3221         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3222         if (result)
3223                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3224                         result);
3225
3226         return result;
3227 }
3228
3229 /* operations setup of the serial interface */
3230 static const struct tty_operations hso_serial_ops = {
3231         .open = hso_serial_open,
3232         .close = hso_serial_close,
3233         .write = hso_serial_write,
3234         .write_room = hso_serial_write_room,
3235         .ioctl = hso_serial_ioctl,
3236         .set_termios = hso_serial_set_termios,
3237         .chars_in_buffer = hso_serial_chars_in_buffer,
3238         .tiocmget = hso_serial_tiocmget,
3239         .tiocmset = hso_serial_tiocmset,
3240         .unthrottle = hso_unthrottle
3241 };
3242
3243 static struct usb_driver hso_driver = {
3244         .name = driver_name,
3245         .probe = hso_probe,
3246         .disconnect = hso_disconnect,
3247         .id_table = hso_ids,
3248         .suspend = hso_suspend,
3249         .resume = hso_resume,
3250         .reset_resume = hso_resume,
3251         .supports_autosuspend = 1,
3252 };
3253
3254 static int __init hso_init(void)
3255 {
3256         int i;
3257         int result;
3258
3259         /* put it in the log */
3260         printk(KERN_INFO "hso: %s\n", version);
3261
3262         /* Initialise the serial table semaphore and table */
3263         spin_lock_init(&serial_table_lock);
3264         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3265                 serial_table[i] = NULL;
3266
3267         /* allocate our driver using the proper amount of supported minors */
3268         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3269         if (!tty_drv)
3270                 return -ENOMEM;
3271
3272         /* fill in all needed values */
3273         tty_drv->magic = TTY_DRIVER_MAGIC;
3274         tty_drv->owner = THIS_MODULE;
3275         tty_drv->driver_name = driver_name;
3276         tty_drv->name = tty_filename;
3277
3278         /* if major number is provided as parameter, use that one */
3279         if (tty_major)
3280                 tty_drv->major = tty_major;
3281
3282         tty_drv->minor_start = 0;
3283         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3284         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3285         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3286         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3287         tty_drv->init_termios = tty_std_termios;
3288         hso_init_termios(&tty_drv->init_termios);
3289         tty_set_operations(tty_drv, &hso_serial_ops);
3290
3291         /* register the tty driver */
3292         result = tty_register_driver(tty_drv);
3293         if (result) {
3294                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3295                         __func__, result);
3296                 return result;
3297         }
3298
3299         /* register this module as an usb driver */
3300         result = usb_register(&hso_driver);
3301         if (result) {
3302                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3303                         result);
3304                 /* cleanup serial interface */
3305                 tty_unregister_driver(tty_drv);
3306                 return result;
3307         }
3308
3309         /* done */
3310         return 0;
3311 }
3312
3313 static void __exit hso_exit(void)
3314 {
3315         printk(KERN_INFO "hso: unloaded\n");
3316
3317         tty_unregister_driver(tty_drv);
3318         /* deregister the usb driver */
3319         usb_deregister(&hso_driver);
3320 }
3321
3322 /* Module definitions */
3323 module_init(hso_init);
3324 module_exit(hso_exit);
3325
3326 MODULE_AUTHOR(MOD_AUTHOR);
3327 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3328 MODULE_LICENSE(MOD_LICENSE);
3329 MODULE_INFO(Version, DRIVER_VERSION);
3330
3331 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3332 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3333 module_param(debug, int, S_IRUGO | S_IWUSR);
3334
3335 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3336 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3337 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3338
3339 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3340 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3341 module_param(disable_net, int, S_IRUGO | S_IWUSR);