drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define DRIVER_VERSION                  "1.2"
  77 #define MOD_AUTHOR                      "Option Wireless"
  78 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  79 #define MOD_LICENSE                     "GPL"
  80
  81 #define HSO_MAX_NET_DEVICES             10
  82 #define HSO__MAX_MTU                    2048
  83 #define DEFAULT_MTU                     1500
  84 #define DEFAULT_MRU                     1500
  85
  86 #define CTRL_URB_RX_SIZE                1024
  87 #define CTRL_URB_TX_SIZE                64
  88
  89 #define BULK_URB_RX_SIZE                4096
  90 #define BULK_URB_TX_SIZE                8192
  91
  92 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  94 #define MUX_BULK_RX_BUF_COUNT           4
  95 #define USB_TYPE_OPTION_VENDOR          0x20
  96
  97 /* These definitions are used with the struct hso_net flags element */
  98 /* - use *_bit operations on it. (bit indices not values.) */
  99 #define HSO_NET_RUNNING                 0
 100
 101 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 102
 103 #define HSO_SERIAL_MAGIC                0x48534f31
 104
 105 /* Number of ttys to handle */
 106 #define HSO_SERIAL_TTY_MINORS           256
 107
 108 #define MAX_RX_URBS                     2
 109
 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 111 {
 112         if (tty)
 113                 return tty->driver_data;
 114         return NULL;
 115 }
 116
 117 /*****************************************************************************/
 118 /* Debugging functions                                                       */
 119 /*****************************************************************************/
 120 #define D__(lvl_, fmt, arg...)                          \
 121         do {                                            \
 122                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 123                        __LINE__, __func__, ## arg);     \
 124         } while (0)
 125
 126 #define D_(lvl, args...)                                \
 127         do {                                            \
 128                 if (lvl & debug)                        \
 129                         D__(KERN_INFO, args);           \
 130         } while (0)
 131
 132 #define D1(args...)     D_(0x01, ##args)
 133 #define D2(args...)     D_(0x02, ##args)
 134 #define D3(args...)     D_(0x04, ##args)
 135 #define D4(args...)     D_(0x08, ##args)
 136 #define D5(args...)     D_(0x10, ##args)
 137
 138 /*****************************************************************************/
 139 /* Enumerators                                                               */
 140 /*****************************************************************************/
 141 enum pkt_parse_state {
 142         WAIT_IP,
 143         WAIT_DATA,
 144         WAIT_SYNC
 145 };
 146
 147 /*****************************************************************************/
 148 /* Structs                                                                   */
 149 /*****************************************************************************/
 150
 151 struct hso_shared_int {
 152         struct usb_endpoint_descriptor *intr_endp;
 153         void *shared_intr_buf;
 154         struct urb *shared_intr_urb;
 155         struct usb_device *usb;
 156         int use_count;
 157         int ref_count;
 158         struct mutex shared_int_lock;
 159 };
 160
 161 struct hso_net {
 162         struct hso_device *parent;
 163         struct net_device *net;
 164         struct rfkill *rfkill;
 165
 166         struct usb_endpoint_descriptor *in_endp;
 167         struct usb_endpoint_descriptor *out_endp;
 168
 169         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 170         struct urb *mux_bulk_tx_urb;
 171         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 172         void *mux_bulk_tx_buf;
 173
 174         struct sk_buff *skb_rx_buf;
 175         struct sk_buff *skb_tx_buf;
 176
 177         enum pkt_parse_state rx_parse_state;
 178         spinlock_t net_lock;
 179
 180         unsigned short rx_buf_size;
 181         unsigned short rx_buf_missing;
 182         struct iphdr rx_ip_hdr;
 183
 184         unsigned long flags;
 185 };
 186
 187 enum rx_ctrl_state{
 188         RX_IDLE,
 189         RX_SENT,
 190         RX_PENDING
 191 };
 192
 193 #define BM_REQUEST_TYPE (0xa1)
 194 #define B_NOTIFICATION  (0x20)
 195 #define W_VALUE         (0x0)
 196 #define W_INDEX         (0x2)
 197 #define W_LENGTH        (0x2)
 198
 199 #define B_OVERRUN       (0x1<<6)
 200 #define B_PARITY        (0x1<<5)
 201 #define B_FRAMING       (0x1<<4)
 202 #define B_RING_SIGNAL   (0x1<<3)
 203 #define B_BREAK         (0x1<<2)
 204 #define B_TX_CARRIER    (0x1<<1)
 205 #define B_RX_CARRIER    (0x1<<0)
 206
 207 struct hso_serial_state_notification {
 208         u8 bmRequestType;
 209         u8 bNotification;
 210         u16 wValue;
 211         u16 wIndex;
 212         u16 wLength;
 213         u16 UART_state_bitmap;
 214 } __attribute__((packed));
 215
 216 struct hso_tiocmget {
 217         struct mutex mutex;
 218         wait_queue_head_t waitq;
 219         int    intr_completed;
 220         struct usb_endpoint_descriptor *endp;
 221         struct urb *urb;
 222         struct hso_serial_state_notification serial_state_notification;
 223         u16    prev_UART_state_bitmap;
 224         struct uart_icount icount;
 225 };
 226
 227
 228 struct hso_serial {
 229         struct hso_device *parent;
 230         int magic;
 231         u8 minor;
 232
 233         struct hso_shared_int *shared_int;
 234
 235         /* rx/tx urb could be either a bulk urb or a control urb depending
 236            on which serial port it is used on. */
 237         struct urb *rx_urb[MAX_RX_URBS];
 238         u8 num_rx_urbs;
 239         u8 *rx_data[MAX_RX_URBS];
 240         u16 rx_data_length;     /* should contain allocated length */
 241
 242         struct urb *tx_urb;
 243         u8 *tx_data;
 244         u8 *tx_buffer;
 245         u16 tx_data_length;     /* should contain allocated length */
 246         u16 tx_data_count;
 247         u16 tx_buffer_count;
 248         struct usb_ctrlrequest ctrl_req_tx;
 249         struct usb_ctrlrequest ctrl_req_rx;
 250
 251         struct usb_endpoint_descriptor *in_endp;
 252         struct usb_endpoint_descriptor *out_endp;
 253
 254         enum rx_ctrl_state rx_state;
 255         u8 rts_state;
 256         u8 dtr_state;
 257         unsigned tx_urb_used:1;
 258
 259         /* from usb_serial_port */
 260         struct tty_struct *tty;
 261         int open_count;
 262         spinlock_t serial_lock;
 263
 264         int (*write_data) (struct hso_serial *serial);
 265         struct hso_tiocmget  *tiocmget;
 266         /* Hacks required to get flow control
 267          * working on the serial receive buffers
 268          * so as not to drop characters on the floor.
 269          */
 270         int  curr_rx_urb_idx;
 271         u16  curr_rx_urb_offset;
 272         u8   rx_urb_filled[MAX_RX_URBS];
 273         struct tasklet_struct unthrottle_tasklet;
 274         struct work_struct    retry_unthrottle_workqueue;
 275 };
 276
 277 struct hso_device {
 278         union {
 279                 struct hso_serial *dev_serial;
 280                 struct hso_net *dev_net;
 281         } port_data;
 282
 283         u32 port_spec;
 284
 285         u8 is_active;
 286         u8 usb_gone;
 287         struct work_struct async_get_intf;
 288         struct work_struct async_put_intf;
 289
 290         struct usb_device *usb;
 291         struct usb_interface *interface;
 292
 293         struct device *dev;
 294         struct kref ref;
 295         struct mutex mutex;
 296 };
 297
 298 /* Type of interface */
 299 #define HSO_INTF_MASK           0xFF00
 300 #define HSO_INTF_MUX            0x0100
 301 #define HSO_INTF_BULK           0x0200
 302
 303 /* Type of port */
 304 #define HSO_PORT_MASK           0xFF
 305 #define HSO_PORT_NO_PORT        0x0
 306 #define HSO_PORT_CONTROL        0x1
 307 #define HSO_PORT_APP            0x2
 308 #define HSO_PORT_GPS            0x3
 309 #define HSO_PORT_PCSC           0x4
 310 #define HSO_PORT_APP2           0x5
 311 #define HSO_PORT_GPS_CONTROL    0x6
 312 #define HSO_PORT_MSD            0x7
 313 #define HSO_PORT_VOICE          0x8
 314 #define HSO_PORT_DIAG2          0x9
 315 #define HSO_PORT_DIAG           0x10
 316 #define HSO_PORT_MODEM          0x11
 317 #define HSO_PORT_NETWORK        0x12
 318
 319 /* Additional device info */
 320 #define HSO_INFO_MASK           0xFF000000
 321 #define HSO_INFO_CRC_BUG        0x01000000
 322
 323 /*****************************************************************************/
 324 /* Prototypes                                                                */
 325 /*****************************************************************************/
 326 /* Serial driver functions */
 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 328                                unsigned int set, unsigned int clear);
 329 static void ctrl_callback(struct urb *urb);
 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 331 static void hso_kick_transmit(struct hso_serial *serial);
 332 /* Helper functions */
 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 334                                    struct usb_device *usb, gfp_t gfp);
 335 static void log_usb_status(int status, const char *function);
 336 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 337                                                   int type, int dir);
 338 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 339 static void hso_free_interface(struct usb_interface *intf);
 340 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 341 static int hso_stop_serial_device(struct hso_device *hso_dev);
 342 static int hso_start_net_device(struct hso_device *hso_dev);
 343 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 344 static int hso_stop_net_device(struct hso_device *hso_dev);
 345 static void hso_serial_ref_free(struct kref *ref);
 346 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 347 static int hso_mux_serial_read(struct hso_serial *serial);
 348 static void async_get_intf(struct work_struct *data);
 349 static void async_put_intf(struct work_struct *data);
 350 static int hso_put_activity(struct hso_device *hso_dev);
 351 static int hso_get_activity(struct hso_device *hso_dev);
 352 static void tiocmget_intr_callback(struct urb *urb);
 353 /*****************************************************************************/
 354 /* Helping functions                                                         */
 355 /*****************************************************************************/
 356
 357 /* #define DEBUG */
 358
 359 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 360 {
 361         return hso_dev->port_data.dev_net;
 362 }
 363
 364 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 365 {
 366         return hso_dev->port_data.dev_serial;
 367 }
 368
 369 /* Debugging functions */
 370 #ifdef DEBUG
 371 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 372                      unsigned int len)
 373 {
 374         static char name[255];
 375
 376         sprintf(name, "hso[%d:%s]", line_count, func_name);
 377         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 378 }
 379
 380 #define DUMP(buf_, len_)        \
 381         dbg_dump(__LINE__, __func__, buf_, len_)
 382
 383 #define DUMP1(buf_, len_)                       \
 384         do {                                    \
 385                 if (0x01 & debug)               \
 386                         DUMP(buf_, len_);       \
 387         } while (0)
 388 #else
 389 #define DUMP(buf_, len_)
 390 #define DUMP1(buf_, len_)
 391 #endif
 392
 393 /* module parameters */
 394 static int debug;
 395 static int tty_major;
 396 static int disable_net;
 397
 398 /* driver info */
 399 static const char driver_name[] = "hso";
 400 static const char tty_filename[] = "ttyHS";
 401 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 402 /* the usb driver itself (registered in hso_init) */
 403 static struct usb_driver hso_driver;
 404 /* serial structures */
 405 static struct tty_driver *tty_drv;
 406 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 407 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 408 static spinlock_t serial_table_lock;
 409
 410 static const s32 default_port_spec[] = {
 411         HSO_INTF_MUX | HSO_PORT_NETWORK,
 412         HSO_INTF_BULK | HSO_PORT_DIAG,
 413         HSO_INTF_BULK | HSO_PORT_MODEM,
 414         0
 415 };
 416
 417 static const s32 icon321_port_spec[] = {
 418         HSO_INTF_MUX | HSO_PORT_NETWORK,
 419         HSO_INTF_BULK | HSO_PORT_DIAG2,
 420         HSO_INTF_BULK | HSO_PORT_MODEM,
 421         HSO_INTF_BULK | HSO_PORT_DIAG,
 422         0
 423 };
 424
 425 #define default_port_device(vendor, product)    \
 426         USB_DEVICE(vendor, product),    \
 427                 .driver_info = (kernel_ulong_t)default_port_spec
 428
 429 #define icon321_port_device(vendor, product)    \
 430         USB_DEVICE(vendor, product),    \
 431                 .driver_info = (kernel_ulong_t)icon321_port_spec
 432
 433 /* list of devices we support */
 434 static const struct usb_device_id hso_ids[] = {
 435         {default_port_device(0x0af0, 0x6711)},
 436         {default_port_device(0x0af0, 0x6731)},
 437         {default_port_device(0x0af0, 0x6751)},
 438         {default_port_device(0x0af0, 0x6771)},
 439         {default_port_device(0x0af0, 0x6791)},
 440         {default_port_device(0x0af0, 0x6811)},
 441         {default_port_device(0x0af0, 0x6911)},
 442         {default_port_device(0x0af0, 0x6951)},
 443         {default_port_device(0x0af0, 0x6971)},
 444         {default_port_device(0x0af0, 0x7011)},
 445         {default_port_device(0x0af0, 0x7031)},
 446         {default_port_device(0x0af0, 0x7051)},
 447         {default_port_device(0x0af0, 0x7071)},
 448         {default_port_device(0x0af0, 0x7111)},
 449         {default_port_device(0x0af0, 0x7211)},
 450         {default_port_device(0x0af0, 0x7251)},
 451         {default_port_device(0x0af0, 0x7271)},
 452         {default_port_device(0x0af0, 0x7311)},
 453         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 454         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 455         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 456         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 457         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 458         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 459         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 460         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 461         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 462         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 463         {USB_DEVICE(0x0af0, 0x7701)},
 464         {USB_DEVICE(0x0af0, 0x7801)},
 465         {USB_DEVICE(0x0af0, 0x7901)},
 466         {USB_DEVICE(0x0af0, 0x8200)},
 467         {USB_DEVICE(0x0af0, 0x8201)},
 468         {USB_DEVICE(0x0af0, 0xd035)},
 469         {USB_DEVICE(0x0af0, 0xd055)},
 470         {USB_DEVICE(0x0af0, 0xd155)},
 471         {USB_DEVICE(0x0af0, 0xd255)},
 472         {USB_DEVICE(0x0af0, 0xd057)},
 473         {USB_DEVICE(0x0af0, 0xd157)},
 474         {USB_DEVICE(0x0af0, 0xd257)},
 475         {USB_DEVICE(0x0af0, 0xd357)},
 476         {}
 477 };
 478 MODULE_DEVICE_TABLE(usb, hso_ids);
 479
 480 /* Sysfs attribute */
 481 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 482                                        struct device_attribute *attr,
 483                                        char *buf)
 484 {
 485         struct hso_device *hso_dev = dev_get_drvdata(dev);
 486         char *port_name;
 487
 488         if (!hso_dev)
 489                 return 0;
 490
 491         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 492         case HSO_PORT_CONTROL:
 493                 port_name = "Control";
 494                 break;
 495         case HSO_PORT_APP:
 496                 port_name = "Application";
 497                 break;
 498         case HSO_PORT_APP2:
 499                 port_name = "Application2";
 500                 break;
 501         case HSO_PORT_GPS:
 502                 port_name = "GPS";
 503                 break;
 504         case HSO_PORT_GPS_CONTROL:
 505                 port_name = "GPS Control";
 506                 break;
 507         case HSO_PORT_PCSC:
 508                 port_name = "PCSC";
 509                 break;
 510         case HSO_PORT_DIAG:
 511                 port_name = "Diagnostic";
 512                 break;
 513         case HSO_PORT_DIAG2:
 514                 port_name = "Diagnostic2";
 515                 break;
 516         case HSO_PORT_MODEM:
 517                 port_name = "Modem";
 518                 break;
 519         case HSO_PORT_NETWORK:
 520                 port_name = "Network";
 521                 break;
 522         default:
 523                 port_name = "Unknown";
 524                 break;
 525         }
 526
 527         return sprintf(buf, "%s\n", port_name);
 528 }
 529 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 530
 531 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 532 {
 533         int idx;
 534
 535         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 536                 if (serial->rx_urb[idx] == urb)
 537                         return idx;
 538         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 539         return -1;
 540 }
 541
 542 /* converts mux value to a port spec value */
 543 static u32 hso_mux_to_port(int mux)
 544 {
 545         u32 result;
 546
 547         switch (mux) {
 548         case 0x1:
 549                 result = HSO_PORT_CONTROL;
 550                 break;
 551         case 0x2:
 552                 result = HSO_PORT_APP;
 553                 break;
 554         case 0x4:
 555                 result = HSO_PORT_PCSC;
 556                 break;
 557         case 0x8:
 558                 result = HSO_PORT_GPS;
 559                 break;
 560         case 0x10:
 561                 result = HSO_PORT_APP2;
 562                 break;
 563         default:
 564                 result = HSO_PORT_NO_PORT;
 565         }
 566         return result;
 567 }
 568
 569 /* converts port spec value to a mux value */
 570 static u32 hso_port_to_mux(int port)
 571 {
 572         u32 result;
 573
 574         switch (port & HSO_PORT_MASK) {
 575         case HSO_PORT_CONTROL:
 576                 result = 0x0;
 577                 break;
 578         case HSO_PORT_APP:
 579                 result = 0x1;
 580                 break;
 581         case HSO_PORT_PCSC:
 582                 result = 0x2;
 583                 break;
 584         case HSO_PORT_GPS:
 585                 result = 0x3;
 586                 break;
 587         case HSO_PORT_APP2:
 588                 result = 0x4;
 589                 break;
 590         default:
 591                 result = 0x0;
 592         }
 593         return result;
 594 }
 595
 596 static struct hso_serial *get_serial_by_shared_int_and_type(
 597                                         struct hso_shared_int *shared_int,
 598                                         int mux)
 599 {
 600         int i, port;
 601
 602         port = hso_mux_to_port(mux);
 603
 604         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 605                 if (serial_table[i]
 606                     && (dev2ser(serial_table[i])->shared_int == shared_int)
 607                     && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 608                         return dev2ser(serial_table[i]);
 609                 }
 610         }
 611
 612         return NULL;
 613 }
 614
 615 static struct hso_serial *get_serial_by_index(unsigned index)
 616 {
 617         struct hso_serial *serial = NULL;
 618         unsigned long flags;
 619
 620         spin_lock_irqsave(&serial_table_lock, flags);
 621         if (serial_table[index])
 622                 serial = dev2ser(serial_table[index]);
 623         spin_unlock_irqrestore(&serial_table_lock, flags);
 624
 625         return serial;
 626 }
 627
 628 static int get_free_serial_index(void)
 629 {
 630         int index;
 631         unsigned long flags;
 632
 633         spin_lock_irqsave(&serial_table_lock, flags);
 634         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 635                 if (serial_table[index] == NULL) {
 636                         spin_unlock_irqrestore(&serial_table_lock, flags);
 637                         return index;
 638                 }
 639         }
 640         spin_unlock_irqrestore(&serial_table_lock, flags);
 641
 642         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 643         return -1;
 644 }
 645
 646 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 647 {
 648         unsigned long flags;
 649
 650         spin_lock_irqsave(&serial_table_lock, flags);
 651         if (serial)
 652                 serial_table[index] = serial->parent;
 653         else
 654                 serial_table[index] = NULL;
 655         spin_unlock_irqrestore(&serial_table_lock, flags);
 656 }
 657
 658 /* log a meaningful explanation of an USB status */
 659 static void log_usb_status(int status, const char *function)
 660 {
 661         char *explanation;
 662
 663         switch (status) {
 664         case -ENODEV:
 665                 explanation = "no device";
 666                 break;
 667         case -ENOENT:
 668                 explanation = "endpoint not enabled";
 669                 break;
 670         case -EPIPE:
 671                 explanation = "endpoint stalled";
 672                 break;
 673         case -ENOSPC:
 674                 explanation = "not enough bandwidth";
 675                 break;
 676         case -ESHUTDOWN:
 677                 explanation = "device disabled";
 678                 break;
 679         case -EHOSTUNREACH:
 680                 explanation = "device suspended";
 681                 break;
 682         case -EINVAL:
 683         case -EAGAIN:
 684         case -EFBIG:
 685         case -EMSGSIZE:
 686                 explanation = "internal error";
 687                 break;
 688         default:
 689                 explanation = "unknown status";
 690                 break;
 691         }
 692         D1("%s: received USB status - %s (%d)", function, explanation, status);
 693 }
 694
 695 /* Network interface functions */
 696
 697 /* called when net interface is brought up by ifconfig */
 698 static int hso_net_open(struct net_device *net)
 699 {
 700         struct hso_net *odev = netdev_priv(net);
 701         unsigned long flags = 0;
 702
 703         if (!odev) {
 704                 dev_err(&net->dev, "No net device !\n");
 705                 return -ENODEV;
 706         }
 707
 708         odev->skb_tx_buf = NULL;
 709
 710         /* setup environment */
 711         spin_lock_irqsave(&odev->net_lock, flags);
 712         odev->rx_parse_state = WAIT_IP;
 713         odev->rx_buf_size = 0;
 714         odev->rx_buf_missing = sizeof(struct iphdr);
 715         spin_unlock_irqrestore(&odev->net_lock, flags);
 716
 717         /* We are up and running. */
 718         set_bit(HSO_NET_RUNNING, &odev->flags);
 719         hso_start_net_device(odev->parent);
 720
 721         /* Tell the kernel we are ready to start receiving from it */
 722         netif_start_queue(net);
 723
 724         return 0;
 725 }
 726
 727 /* called when interface is brought down by ifconfig */
 728 static int hso_net_close(struct net_device *net)
 729 {
 730         struct hso_net *odev = netdev_priv(net);
 731
 732         /* we don't need the queue anymore */
 733         netif_stop_queue(net);
 734         /* no longer running */
 735         clear_bit(HSO_NET_RUNNING, &odev->flags);
 736
 737         hso_stop_net_device(odev->parent);
 738
 739         /* done */
 740         return 0;
 741 }
 742
 743 /* USB tells is xmit done, we should start the netqueue again */
 744 static void write_bulk_callback(struct urb *urb)
 745 {
 746         struct hso_net *odev = urb->context;
 747         int status = urb->status;
 748
 749         /* Sanity check */
 750         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 751                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 752                 return;
 753         }
 754
 755         /* Do we still have a valid kernel network device? */
 756         if (!netif_device_present(odev->net)) {
 757                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 758                         __func__);
 759                 return;
 760         }
 761
 762         /* log status, but don't act on it, we don't need to resubmit anything
 763          * anyhow */
 764         if (status)
 765                 log_usb_status(status, __func__);
 766
 767         hso_put_activity(odev->parent);
 768
 769         /* Tell the network interface we are ready for another frame */
 770         netif_wake_queue(odev->net);
 771 }
 772
 773 /* called by kernel when we need to transmit a packet */
 774 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 775 {
 776         struct hso_net *odev = netdev_priv(net);
 777         int result;
 778
 779         /* Tell the kernel, "No more frames 'til we are done with this one." */
 780         netif_stop_queue(net);
 781         if (hso_get_activity(odev->parent) == -EAGAIN) {
 782                 odev->skb_tx_buf = skb;
 783                 return 0;
 784         }
 785
 786         /* log if asked */
 787         DUMP1(skb->data, skb->len);
 788         /* Copy it from kernel memory to OUR memory */
 789         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 790         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 791
 792         /* Fill in the URB for shipping it out. */
 793         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 794                           odev->parent->usb,
 795                           usb_sndbulkpipe(odev->parent->usb,
 796                                           odev->out_endp->
 797                                           bEndpointAddress & 0x7F),
 798                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 799                           odev);
 800
 801         /* Deal with the Zero Length packet problem, I hope */
 802         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 803
 804         /* Send the URB on its merry way. */
 805         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 806         if (result) {
 807                 dev_warn(&odev->parent->interface->dev,
 808                         "failed mux_bulk_tx_urb %d", result);
 809                 net->stats.tx_errors++;
 810                 netif_start_queue(net);
 811         } else {
 812                 net->stats.tx_packets++;
 813                 net->stats.tx_bytes += skb->len;
 814                 /* And tell the kernel when the last transmit started. */
 815                 net->trans_start = jiffies;
 816         }
 817         dev_kfree_skb(skb);
 818         /* we're done */
 819         return NETDEV_TX_OK;
 820 }
 821
 822 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 823 {
 824         struct hso_net *odev = netdev_priv(net);
 825
 826         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 827         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 828         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 829 }
 830
 831 static struct ethtool_ops ops = {
 832         .get_drvinfo = hso_get_drvinfo,
 833         .get_link = ethtool_op_get_link
 834 };
 835
 836 /* called when a packet did not ack after watchdogtimeout */
 837 static void hso_net_tx_timeout(struct net_device *net)
 838 {
 839         struct hso_net *odev = netdev_priv(net);
 840
 841         if (!odev)
 842                 return;
 843
 844         /* Tell syslog we are hosed. */
 845         dev_warn(&net->dev, "Tx timed out.\n");
 846
 847         /* Tear the waiting frame off the list */
 848         if (odev->mux_bulk_tx_urb
 849             && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 850                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 851
 852         /* Update statistics */
 853         net->stats.tx_errors++;
 854 }
 855
 856 /* make a real packet from the received USB buffer */
 857 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 858                         unsigned int count, unsigned char is_eop)
 859 {
 860         unsigned short temp_bytes;
 861         unsigned short buffer_offset = 0;
 862         unsigned short frame_len;
 863         unsigned char *tmp_rx_buf;
 864
 865         /* log if needed */
 866         D1("Rx %d bytes", count);
 867         DUMP(ip_pkt, min(128, (int)count));
 868
 869         while (count) {
 870                 switch (odev->rx_parse_state) {
 871                 case WAIT_IP:
 872                         /* waiting for IP header. */
 873                         /* wanted bytes - size of ip header */
 874                         temp_bytes =
 875                             (count <
 876                              odev->rx_buf_missing) ? count : odev->
 877                             rx_buf_missing;
 878
 879                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 880                                odev->rx_buf_size, ip_pkt + buffer_offset,
 881                                temp_bytes);
 882
 883                         odev->rx_buf_size += temp_bytes;
 884                         buffer_offset += temp_bytes;
 885                         odev->rx_buf_missing -= temp_bytes;
 886                         count -= temp_bytes;
 887
 888                         if (!odev->rx_buf_missing) {
 889                                 /* header is complete allocate an sk_buffer and
 890                                  * continue to WAIT_DATA */
 891                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 892
 893                                 if ((frame_len > DEFAULT_MRU) ||
 894                                     (frame_len < sizeof(struct iphdr))) {
 895                                         dev_err(&odev->net->dev,
 896                                                 "Invalid frame (%d) length\n",
 897                                                 frame_len);
 898                                         odev->rx_parse_state = WAIT_SYNC;
 899                                         continue;
 900                                 }
 901                                 /* Allocate an sk_buff */
 902                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 903                                                                     frame_len);
 904                                 if (!odev->skb_rx_buf) {
 905                                         /* We got no receive buffer. */
 906                                         D1("could not allocate memory");
 907                                         odev->rx_parse_state = WAIT_SYNC;
 908                                         return;
 909                                 }
 910
 911                                 /* Copy what we got so far. make room for iphdr
 912                                  * after tail. */
 913                                 tmp_rx_buf =
 914                                     skb_put(odev->skb_rx_buf,
 915                                             sizeof(struct iphdr));
 916                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 917                                        sizeof(struct iphdr));
 918
 919                                 /* ETH_HLEN */
 920                                 odev->rx_buf_size = sizeof(struct iphdr);
 921
 922                                 /* Filip actually use .tot_len */
 923                                 odev->rx_buf_missing =
 924                                     frame_len - sizeof(struct iphdr);
 925                                 odev->rx_parse_state = WAIT_DATA;
 926                         }
 927                         break;
 928
 929                 case WAIT_DATA:
 930                         temp_bytes = (count < odev->rx_buf_missing)
 931                                         ? count : odev->rx_buf_missing;
 932
 933                         /* Copy the rest of the bytes that are left in the
 934                          * buffer into the waiting sk_buf. */
 935                         /* Make room for temp_bytes after tail. */
 936                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 937                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 938
 939                         odev->rx_buf_missing -= temp_bytes;
 940                         count -= temp_bytes;
 941                         buffer_offset += temp_bytes;
 942                         odev->rx_buf_size += temp_bytes;
 943                         if (!odev->rx_buf_missing) {
 944                                 /* Packet is complete. Inject into stack. */
 945                                 /* We have IP packet here */
 946                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 947                                 /* don't check it */
 948                                 odev->skb_rx_buf->ip_summed =
 949                                         CHECKSUM_UNNECESSARY;
 950
 951                                 skb_reset_mac_header(odev->skb_rx_buf);
 952
 953                                 /* Ship it off to the kernel */
 954                                 netif_rx(odev->skb_rx_buf);
 955                                 /* No longer our buffer. */
 956                                 odev->skb_rx_buf = NULL;
 957
 958                                 /* update out statistics */
 959                                 odev->net->stats.rx_packets++;
 960
 961                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 962
 963                                 odev->rx_buf_size = 0;
 964                                 odev->rx_buf_missing = sizeof(struct iphdr);
 965                                 odev->rx_parse_state = WAIT_IP;
 966                         }
 967                         break;
 968
 969                 case WAIT_SYNC:
 970                         D1(" W_S");
 971                         count = 0;
 972                         break;
 973                 default:
 974                         D1(" ");
 975                         count--;
 976                         break;
 977                 }
 978         }
 979
 980         /* Recovery mechanism for WAIT_SYNC state. */
 981         if (is_eop) {
 982                 if (odev->rx_parse_state == WAIT_SYNC) {
 983                         odev->rx_parse_state = WAIT_IP;
 984                         odev->rx_buf_size = 0;
 985                         odev->rx_buf_missing = sizeof(struct iphdr);
 986                 }
 987         }
 988 }
 989
 990 /* Moving data from usb to kernel (in interrupt state) */
 991 static void read_bulk_callback(struct urb *urb)
 992 {
 993         struct hso_net *odev = urb->context;
 994         struct net_device *net;
 995         int result;
 996         int status = urb->status;
 997
 998         /* is al ok?  (Filip: Who's Al ?) */
 999         if (status) {
1000                 log_usb_status(status, __func__);
1001                 return;
1002         }
1003
1004         /* Sanity check */
1005         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1006                 D1("BULK IN callback but driver is not active!");
1007                 return;
1008         }
1009         usb_mark_last_busy(urb->dev);
1010
1011         net = odev->net;
1012
1013         if (!netif_device_present(net)) {
1014                 /* Somebody killed our network interface... */
1015                 return;
1016         }
1017
1018         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1019                 u32 rest;
1020                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1021                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1022                 if (((rest == 5) || (rest == 6))
1023                     && !memcmp(((u8 *) urb->transfer_buffer) +
1024                                urb->actual_length - 4, crc_check, 4)) {
1025                         urb->actual_length -= 4;
1026                 }
1027         }
1028
1029         /* do we even have a packet? */
1030         if (urb->actual_length) {
1031                 /* Handle the IP stream, add header and push it onto network
1032                  * stack if the packet is complete. */
1033                 spin_lock(&odev->net_lock);
1034                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1035                             (urb->transfer_buffer_length >
1036                              urb->actual_length) ? 1 : 0);
1037                 spin_unlock(&odev->net_lock);
1038         }
1039
1040         /* We are done with this URB, resubmit it. Prep the USB to wait for
1041          * another frame. Reuse same as received. */
1042         usb_fill_bulk_urb(urb,
1043                           odev->parent->usb,
1044                           usb_rcvbulkpipe(odev->parent->usb,
1045                                           odev->in_endp->
1046                                           bEndpointAddress & 0x7F),
1047                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1048                           read_bulk_callback, odev);
1049
1050         /* Give this to the USB subsystem so it can tell us when more data
1051          * arrives. */
1052         result = usb_submit_urb(urb, GFP_ATOMIC);
1053         if (result)
1054                 dev_warn(&odev->parent->interface->dev,
1055                          "%s failed submit mux_bulk_rx_urb %d", __func__,
1056                          result);
1057 }
1058
1059 /* Serial driver functions */
1060
1061 static void hso_init_termios(struct ktermios *termios)
1062 {
1063         /*
1064          * The default requirements for this device are:
1065          */
1066         termios->c_iflag &=
1067                 ~(IGNBRK        /* disable ignore break */
1068                 | BRKINT        /* disable break causes interrupt */
1069                 | PARMRK        /* disable mark parity errors */
1070                 | ISTRIP        /* disable clear high bit of input characters */
1071                 | INLCR         /* disable translate NL to CR */
1072                 | IGNCR         /* disable ignore CR */
1073                 | ICRNL         /* disable translate CR to NL */
1074                 | IXON);        /* disable enable XON/XOFF flow control */
1075
1076         /* disable postprocess output characters */
1077         termios->c_oflag &= ~OPOST;
1078
1079         termios->c_lflag &=
1080                 ~(ECHO          /* disable echo input characters */
1081                 | ECHONL        /* disable echo new line */
1082                 | ICANON        /* disable erase, kill, werase, and rprnt
1083                                    special characters */
1084                 | ISIG          /* disable interrupt, quit, and suspend special
1085                                    characters */
1086                 | IEXTEN);      /* disable non-POSIX special characters */
1087
1088         termios->c_cflag &=
1089                 ~(CSIZE         /* no size */
1090                 | PARENB        /* disable parity bit */
1091                 | CBAUD         /* clear current baud rate */
1092                 | CBAUDEX);     /* clear current buad rate */
1093
1094         termios->c_cflag |= CS8;        /* character size 8 bits */
1095
1096         /* baud rate 115200 */
1097         tty_termios_encode_baud_rate(termios, 115200, 115200);
1098 }
1099
1100 static void _hso_serial_set_termios(struct tty_struct *tty,
1101                                     struct ktermios *old)
1102 {
1103         struct hso_serial *serial = get_serial_by_tty(tty);
1104         struct ktermios *termios;
1105
1106         if (!serial) {
1107                 printk(KERN_ERR "%s: no tty structures", __func__);
1108                 return;
1109         }
1110
1111         D4("port %d", serial->minor);
1112
1113         /*
1114          *      Fix up unsupported bits
1115          */
1116         termios = tty->termios;
1117         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1118
1119         termios->c_cflag &=
1120                 ~(CSIZE         /* no size */
1121                 | PARENB        /* disable parity bit */
1122                 | CBAUD         /* clear current baud rate */
1123                 | CBAUDEX);     /* clear current buad rate */
1124
1125         termios->c_cflag |= CS8;        /* character size 8 bits */
1126
1127         /* baud rate 115200 */
1128         tty_encode_baud_rate(tty, 115200, 115200);
1129 }
1130
1131 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1132 {
1133         int result;
1134 #ifdef CONFIG_HSO_AUTOPM
1135         usb_mark_last_busy(urb->dev);
1136 #endif
1137         /* We are done with this URB, resubmit it. Prep the USB to wait for
1138          * another frame */
1139         usb_fill_bulk_urb(urb, serial->parent->usb,
1140                           usb_rcvbulkpipe(serial->parent->usb,
1141                                           serial->in_endp->
1142                                           bEndpointAddress & 0x7F),
1143                           urb->transfer_buffer, serial->rx_data_length,
1144                           hso_std_serial_read_bulk_callback, serial);
1145         /* Give this to the USB subsystem so it can tell us when more data
1146          * arrives. */
1147         result = usb_submit_urb(urb, GFP_ATOMIC);
1148         if (result) {
1149                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1150                         __func__, result);
1151         }
1152 }
1153
1154
1155
1156
1157 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1158 {
1159         int count;
1160         struct urb *curr_urb;
1161
1162         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1163                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1164                 count = put_rxbuf_data(curr_urb, serial);
1165                 if (count == -1)
1166                         return;
1167                 if (count == 0) {
1168                         serial->curr_rx_urb_idx++;
1169                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1170                                 serial->curr_rx_urb_idx = 0;
1171                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1172                 }
1173         }
1174 }
1175
1176 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1177 {
1178         int count = 0;
1179         struct urb *urb;
1180
1181         urb = serial->rx_urb[0];
1182         if (serial->open_count > 0) {
1183                 count = put_rxbuf_data(urb, serial);
1184                 if (count == -1)
1185                         return;
1186         }
1187         /* Re issue a read as long as we receive data. */
1188
1189         if (count == 0 && ((urb->actual_length != 0) ||
1190                            (serial->rx_state == RX_PENDING))) {
1191                 serial->rx_state = RX_SENT;
1192                 hso_mux_serial_read(serial);
1193         } else
1194                 serial->rx_state = RX_IDLE;
1195 }
1196
1197
1198 /* read callback for Diag and CS port */
1199 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1200 {
1201         struct hso_serial *serial = urb->context;
1202         int status = urb->status;
1203
1204         /* sanity check */
1205         if (!serial) {
1206                 D1("serial == NULL");
1207                 return;
1208         } else if (status) {
1209                 log_usb_status(status, __func__);
1210                 return;
1211         }
1212
1213         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1214         D1("Actual length = %d\n", urb->actual_length);
1215         DUMP1(urb->transfer_buffer, urb->actual_length);
1216
1217         /* Anyone listening? */
1218         if (serial->open_count == 0)
1219                 return;
1220
1221         if (status == 0) {
1222                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1223                         u32 rest;
1224                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1225                         rest =
1226                             urb->actual_length %
1227                             serial->in_endp->wMaxPacketSize;
1228                         if (((rest == 5) || (rest == 6))
1229                             && !memcmp(((u8 *) urb->transfer_buffer) +
1230                                        urb->actual_length - 4, crc_check, 4)) {
1231                                 urb->actual_length -= 4;
1232                         }
1233                 }
1234                 /* Valid data, handle RX data */
1235                 spin_lock(&serial->serial_lock);
1236                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1237                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1238                 spin_unlock(&serial->serial_lock);
1239         } else if (status == -ENOENT || status == -ECONNRESET) {
1240                 /* Unlinked - check for throttled port. */
1241                 D2("Port %d, successfully unlinked urb", serial->minor);
1242                 spin_lock(&serial->serial_lock);
1243                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1244                 hso_resubmit_rx_bulk_urb(serial, urb);
1245                 spin_unlock(&serial->serial_lock);
1246         } else {
1247                 D2("Port %d, status = %d for read urb", serial->minor, status);
1248                 return;
1249         }
1250 }
1251
1252 /*
1253  * This needs to be a tasklet otherwise we will
1254  * end up recursively calling this function.
1255  */
1256 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1257 {
1258         unsigned long flags;
1259
1260         spin_lock_irqsave(&serial->serial_lock, flags);
1261         if ((serial->parent->port_spec & HSO_INTF_MUX))
1262                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1263         else
1264                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1265         spin_unlock_irqrestore(&serial->serial_lock, flags);
1266 }
1267
1268 static  void hso_unthrottle(struct tty_struct *tty)
1269 {
1270         struct hso_serial *serial = get_serial_by_tty(tty);
1271
1272         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1273 }
1274
1275 static void hso_unthrottle_workfunc(struct work_struct *work)
1276 {
1277         struct hso_serial *serial =
1278             container_of(work, struct hso_serial,
1279                          retry_unthrottle_workqueue);
1280         hso_unthrottle_tasklet(serial);
1281 }
1282
1283 /* open the requested serial port */
1284 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1285 {
1286         struct hso_serial *serial = get_serial_by_index(tty->index);
1287         int result;
1288
1289         /* sanity check */
1290         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1291                 WARN_ON(1);
1292                 tty->driver_data = NULL;
1293                 D1("Failed to open port");
1294                 return -ENODEV;
1295         }
1296
1297         mutex_lock(&serial->parent->mutex);
1298         result = usb_autopm_get_interface(serial->parent->interface);
1299         if (result < 0)
1300                 goto err_out;
1301
1302         D1("Opening %d", serial->minor);
1303         kref_get(&serial->parent->ref);
1304
1305         /* setup */
1306         spin_lock_irq(&serial->serial_lock);
1307         tty->driver_data = serial;
1308         tty_kref_put(serial->tty);
1309         serial->tty = tty_kref_get(tty);
1310         spin_unlock_irq(&serial->serial_lock);
1311
1312         /* check for port already opened, if not set the termios */
1313         serial->open_count++;
1314         if (serial->open_count == 1) {
1315                 tty->low_latency = 1;
1316                 serial->rx_state = RX_IDLE;
1317                 /* Force default termio settings */
1318                 _hso_serial_set_termios(tty, NULL);
1319                 tasklet_init(&serial->unthrottle_tasklet,
1320                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1321                              (unsigned long)serial);
1322                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1323                           hso_unthrottle_workfunc);
1324                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1325                 if (result) {
1326                         hso_stop_serial_device(serial->parent);
1327                         serial->open_count--;
1328                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1329                 }
1330         } else {
1331                 D1("Port was already open");
1332         }
1333
1334         usb_autopm_put_interface(serial->parent->interface);
1335
1336         /* done */
1337         if (result)
1338                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1339 err_out:
1340         mutex_unlock(&serial->parent->mutex);
1341         return result;
1342 }
1343
1344 /* close the requested serial port */
1345 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1346 {
1347         struct hso_serial *serial = tty->driver_data;
1348         u8 usb_gone;
1349
1350         D1("Closing serial port");
1351
1352         /* Open failed, no close cleanup required */
1353         if (serial == NULL)
1354                 return;
1355
1356         mutex_lock(&serial->parent->mutex);
1357         usb_gone = serial->parent->usb_gone;
1358
1359         if (!usb_gone)
1360                 usb_autopm_get_interface(serial->parent->interface);
1361
1362         /* reset the rts and dtr */
1363         /* do the actual close */
1364         serial->open_count--;
1365         kref_put(&serial->parent->ref, hso_serial_ref_free);
1366         if (serial->open_count <= 0) {
1367                 serial->open_count = 0;
1368                 spin_lock_irq(&serial->serial_lock);
1369                 if (serial->tty == tty) {
1370                         serial->tty->driver_data = NULL;
1371                         serial->tty = NULL;
1372                         tty_kref_put(tty);
1373                 }
1374                 spin_unlock_irq(&serial->serial_lock);
1375                 if (!usb_gone)
1376                         hso_stop_serial_device(serial->parent);
1377                 tasklet_kill(&serial->unthrottle_tasklet);
1378                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1379         }
1380
1381         if (!usb_gone)
1382                 usb_autopm_put_interface(serial->parent->interface);
1383
1384         mutex_unlock(&serial->parent->mutex);
1385 }
1386
1387 /* close the requested serial port */
1388 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1389                             int count)
1390 {
1391         struct hso_serial *serial = get_serial_by_tty(tty);
1392         int space, tx_bytes;
1393         unsigned long flags;
1394
1395         /* sanity check */
1396         if (serial == NULL) {
1397                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1398                 return -ENODEV;
1399         }
1400
1401         spin_lock_irqsave(&serial->serial_lock, flags);
1402
1403         space = serial->tx_data_length - serial->tx_buffer_count;
1404         tx_bytes = (count < space) ? count : space;
1405
1406         if (!tx_bytes)
1407                 goto out;
1408
1409         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1410         serial->tx_buffer_count += tx_bytes;
1411
1412 out:
1413         spin_unlock_irqrestore(&serial->serial_lock, flags);
1414
1415         hso_kick_transmit(serial);
1416         /* done */
1417         return tx_bytes;
1418 }
1419
1420 /* how much room is there for writing */
1421 static int hso_serial_write_room(struct tty_struct *tty)
1422 {
1423         struct hso_serial *serial = get_serial_by_tty(tty);
1424         int room;
1425         unsigned long flags;
1426
1427         spin_lock_irqsave(&serial->serial_lock, flags);
1428         room = serial->tx_data_length - serial->tx_buffer_count;
1429         spin_unlock_irqrestore(&serial->serial_lock, flags);
1430
1431         /* return free room */
1432         return room;
1433 }
1434
1435 /* setup the term */
1436 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1437 {
1438         struct hso_serial *serial = get_serial_by_tty(tty);
1439         unsigned long flags;
1440
1441         if (old)
1442                 D5("Termios called with: cflags new[%d] - old[%d]",
1443                    tty->termios->c_cflag, old->c_cflag);
1444
1445         /* the actual setup */
1446         spin_lock_irqsave(&serial->serial_lock, flags);
1447         if (serial->open_count)
1448                 _hso_serial_set_termios(tty, old);
1449         else
1450                 tty->termios = old;
1451         spin_unlock_irqrestore(&serial->serial_lock, flags);
1452
1453         /* done */
1454         return;
1455 }
1456
1457 /* how many characters in the buffer */
1458 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1459 {
1460         struct hso_serial *serial = get_serial_by_tty(tty);
1461         int chars;
1462         unsigned long flags;
1463
1464         /* sanity check */
1465         if (serial == NULL)
1466                 return 0;
1467
1468         spin_lock_irqsave(&serial->serial_lock, flags);
1469         chars = serial->tx_buffer_count;
1470         spin_unlock_irqrestore(&serial->serial_lock, flags);
1471
1472         return chars;
1473 }
1474 static int tiocmget_submit_urb(struct hso_serial *serial,
1475                                struct hso_tiocmget *tiocmget,
1476                                struct usb_device *usb)
1477 {
1478         int result;
1479
1480         if (serial->parent->usb_gone)
1481                 return -ENODEV;
1482         usb_fill_int_urb(tiocmget->urb, usb,
1483                          usb_rcvintpipe(usb,
1484                                         tiocmget->endp->
1485                                         bEndpointAddress & 0x7F),
1486                          &tiocmget->serial_state_notification,
1487                          sizeof(struct hso_serial_state_notification),
1488                          tiocmget_intr_callback, serial,
1489                          tiocmget->endp->bInterval);
1490         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1491         if (result) {
1492                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1493                          result);
1494         }
1495         return result;
1496
1497 }
1498
1499 static void tiocmget_intr_callback(struct urb *urb)
1500 {
1501         struct hso_serial *serial = urb->context;
1502         struct hso_tiocmget *tiocmget;
1503         int status = urb->status;
1504         u16 UART_state_bitmap, prev_UART_state_bitmap;
1505         struct uart_icount *icount;
1506         struct hso_serial_state_notification *serial_state_notification;
1507         struct usb_device *usb;
1508
1509         /* Sanity checks */
1510         if (!serial)
1511                 return;
1512         if (status) {
1513                 log_usb_status(status, __func__);
1514                 return;
1515         }
1516         tiocmget = serial->tiocmget;
1517         if (!tiocmget)
1518                 return;
1519         usb = serial->parent->usb;
1520         serial_state_notification = &tiocmget->serial_state_notification;
1521         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1522             serial_state_notification->bNotification != B_NOTIFICATION ||
1523             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1524             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1525             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1526                 dev_warn(&usb->dev,
1527                          "hso received invalid serial state notification\n");
1528                 DUMP(serial_state_notification,
1529                      sizeof(hso_serial_state_notifation))
1530         } else {
1531
1532                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1533                                                 UART_state_bitmap);
1534                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1535                 icount = &tiocmget->icount;
1536                 spin_lock(&serial->serial_lock);
1537                 if ((UART_state_bitmap & B_OVERRUN) !=
1538                    (prev_UART_state_bitmap & B_OVERRUN))
1539                         icount->parity++;
1540                 if ((UART_state_bitmap & B_PARITY) !=
1541                    (prev_UART_state_bitmap & B_PARITY))
1542                         icount->parity++;
1543                 if ((UART_state_bitmap & B_FRAMING) !=
1544                    (prev_UART_state_bitmap & B_FRAMING))
1545                         icount->frame++;
1546                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1547                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1548                         icount->rng++;
1549                 if ((UART_state_bitmap & B_BREAK) !=
1550                    (prev_UART_state_bitmap & B_BREAK))
1551                         icount->brk++;
1552                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1553                    (prev_UART_state_bitmap & B_TX_CARRIER))
1554                         icount->dsr++;
1555                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1556                    (prev_UART_state_bitmap & B_RX_CARRIER))
1557                         icount->dcd++;
1558                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1559                 spin_unlock(&serial->serial_lock);
1560                 tiocmget->intr_completed = 1;
1561                 wake_up_interruptible(&tiocmget->waitq);
1562         }
1563         memset(serial_state_notification, 0,
1564                sizeof(struct hso_serial_state_notification));
1565         tiocmget_submit_urb(serial,
1566                             tiocmget,
1567                             serial->parent->usb);
1568 }
1569
1570 /*
1571  * next few functions largely stolen from drivers/serial/serial_core.c
1572  */
1573 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1574  * - mask passed in arg for lines of interest
1575  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1576  * Caller should use TIOCGICOUNT to see which one it was
1577  */
1578 static int
1579 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1580 {
1581         DECLARE_WAITQUEUE(wait, current);
1582         struct uart_icount cprev, cnow;
1583         struct hso_tiocmget  *tiocmget;
1584         int ret;
1585
1586         tiocmget = serial->tiocmget;
1587         if (!tiocmget)
1588                 return -ENOENT;
1589         /*
1590          * note the counters on entry
1591          */
1592         spin_lock_irq(&serial->serial_lock);
1593         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1594         spin_unlock_irq(&serial->serial_lock);
1595         add_wait_queue(&tiocmget->waitq, &wait);
1596         for (;;) {
1597                 spin_lock_irq(&serial->serial_lock);
1598                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1599                 spin_unlock_irq(&serial->serial_lock);
1600                 set_current_state(TASK_INTERRUPTIBLE);
1601                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1602                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1603                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1604                         ret = 0;
1605                         break;
1606                 }
1607                 schedule();
1608                 /* see if a signal did it */
1609                 if (signal_pending(current)) {
1610                         ret = -ERESTARTSYS;
1611                         break;
1612                 }
1613                 cprev = cnow;
1614         }
1615         current->state = TASK_RUNNING;
1616         remove_wait_queue(&tiocmget->waitq, &wait);
1617
1618         return ret;
1619 }
1620
1621 /*
1622  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1623  * Return: write counters to the user passed counter struct
1624  * NB: both 1->0 and 0->1 transitions are counted except for
1625  *     RI where only 0->1 is counted.
1626  */
1627 static int hso_get_count(struct hso_serial *serial,
1628                           struct serial_icounter_struct __user *icnt)
1629 {
1630         struct serial_icounter_struct icount;
1631         struct uart_icount cnow;
1632         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1633
1634         if (!tiocmget)
1635                  return -ENOENT;
1636         spin_lock_irq(&serial->serial_lock);
1637         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1638         spin_unlock_irq(&serial->serial_lock);
1639
1640         icount.cts         = cnow.cts;
1641         icount.dsr         = cnow.dsr;
1642         icount.rng         = cnow.rng;
1643         icount.dcd         = cnow.dcd;
1644         icount.rx          = cnow.rx;
1645         icount.tx          = cnow.tx;
1646         icount.frame       = cnow.frame;
1647         icount.overrun     = cnow.overrun;
1648         icount.parity      = cnow.parity;
1649         icount.brk         = cnow.brk;
1650         icount.buf_overrun = cnow.buf_overrun;
1651
1652         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1653 }
1654
1655
1656 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1657 {
1658         int retval;
1659         struct hso_serial *serial = get_serial_by_tty(tty);
1660         struct hso_tiocmget  *tiocmget;
1661         u16 UART_state_bitmap;
1662
1663         /* sanity check */
1664         if (!serial) {
1665                 D1("no tty structures");
1666                 return -EINVAL;
1667         }
1668         spin_lock_irq(&serial->serial_lock);
1669         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1670             ((serial->dtr_state) ? TIOCM_DTR : 0);
1671         tiocmget = serial->tiocmget;
1672         if (tiocmget) {
1673
1674                 UART_state_bitmap = le16_to_cpu(
1675                         tiocmget->prev_UART_state_bitmap);
1676                 if (UART_state_bitmap & B_RING_SIGNAL)
1677                         retval |=  TIOCM_RNG;
1678                 if (UART_state_bitmap & B_RX_CARRIER)
1679                         retval |=  TIOCM_CD;
1680                 if (UART_state_bitmap & B_TX_CARRIER)
1681                         retval |=  TIOCM_DSR;
1682         }
1683         spin_unlock_irq(&serial->serial_lock);
1684         return retval;
1685 }
1686
1687 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1688                                unsigned int set, unsigned int clear)
1689 {
1690         int val = 0;
1691         unsigned long flags;
1692         int if_num;
1693         struct hso_serial *serial = get_serial_by_tty(tty);
1694
1695         /* sanity check */
1696         if (!serial) {
1697                 D1("no tty structures");
1698                 return -EINVAL;
1699         }
1700         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1701
1702         spin_lock_irqsave(&serial->serial_lock, flags);
1703         if (set & TIOCM_RTS)
1704                 serial->rts_state = 1;
1705         if (set & TIOCM_DTR)
1706                 serial->dtr_state = 1;
1707
1708         if (clear & TIOCM_RTS)
1709                 serial->rts_state = 0;
1710         if (clear & TIOCM_DTR)
1711                 serial->dtr_state = 0;
1712
1713         if (serial->dtr_state)
1714                 val |= 0x01;
1715         if (serial->rts_state)
1716                 val |= 0x02;
1717
1718         spin_unlock_irqrestore(&serial->serial_lock, flags);
1719
1720         return usb_control_msg(serial->parent->usb,
1721                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1722                                0x21, val, if_num, NULL, 0,
1723                                USB_CTRL_SET_TIMEOUT);
1724 }
1725
1726 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1727                             unsigned int cmd, unsigned long arg)
1728 {
1729         struct hso_serial *serial =  get_serial_by_tty(tty);
1730         void __user *uarg = (void __user *)arg;
1731         int ret = 0;
1732         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1733
1734         if (!serial)
1735                 return -ENODEV;
1736         switch (cmd) {
1737         case TIOCMIWAIT:
1738                 ret = hso_wait_modem_status(serial, arg);
1739                 break;
1740
1741         case TIOCGICOUNT:
1742                 ret = hso_get_count(serial, uarg);
1743                 break;
1744         default:
1745                 ret = -ENOIOCTLCMD;
1746                 break;
1747         }
1748         return ret;
1749 }
1750
1751
1752 /* starts a transmit */
1753 static void hso_kick_transmit(struct hso_serial *serial)
1754 {
1755         u8 *temp;
1756         unsigned long flags;
1757         int res;
1758
1759         spin_lock_irqsave(&serial->serial_lock, flags);
1760         if (!serial->tx_buffer_count)
1761                 goto out;
1762
1763         if (serial->tx_urb_used)
1764                 goto out;
1765
1766         /* Wakeup USB interface if necessary */
1767         if (hso_get_activity(serial->parent) == -EAGAIN)
1768                 goto out;
1769
1770         /* Switch pointers around to avoid memcpy */
1771         temp = serial->tx_buffer;
1772         serial->tx_buffer = serial->tx_data;
1773         serial->tx_data = temp;
1774         serial->tx_data_count = serial->tx_buffer_count;
1775         serial->tx_buffer_count = 0;
1776
1777         /* If temp is set, it means we switched buffers */
1778         if (temp && serial->write_data) {
1779                 res = serial->write_data(serial);
1780                 if (res >= 0)
1781                         serial->tx_urb_used = 1;
1782         }
1783 out:
1784         spin_unlock_irqrestore(&serial->serial_lock, flags);
1785 }
1786
1787 /* make a request (for reading and writing data to muxed serial port) */
1788 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1789                               struct urb *ctrl_urb,
1790                               struct usb_ctrlrequest *ctrl_req,
1791                               u8 *ctrl_urb_data, u32 size)
1792 {
1793         int result;
1794         int pipe;
1795
1796         /* Sanity check */
1797         if (!serial || !ctrl_urb || !ctrl_req) {
1798                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1799                 return -EINVAL;
1800         }
1801
1802         /* initialize */
1803         ctrl_req->wValue = 0;
1804         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1805         ctrl_req->wLength = cpu_to_le16(size);
1806
1807         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1808                 /* Reading command */
1809                 ctrl_req->bRequestType = USB_DIR_IN |
1810                                          USB_TYPE_OPTION_VENDOR |
1811                                          USB_RECIP_INTERFACE;
1812                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1813                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1814         } else {
1815                 /* Writing command */
1816                 ctrl_req->bRequestType = USB_DIR_OUT |
1817                                          USB_TYPE_OPTION_VENDOR |
1818                                          USB_RECIP_INTERFACE;
1819                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1820                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1821         }
1822         /* syslog */
1823         D2("%s command (%02x) len: %d, port: %d",
1824            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1825            ctrl_req->bRequestType, ctrl_req->wLength, port);
1826
1827         /* Load ctrl urb */
1828         ctrl_urb->transfer_flags = 0;
1829         usb_fill_control_urb(ctrl_urb,
1830                              serial->parent->usb,
1831                              pipe,
1832                              (u8 *) ctrl_req,
1833                              ctrl_urb_data, size, ctrl_callback, serial);
1834         /* Send it on merry way */
1835         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1836         if (result) {
1837                 dev_err(&ctrl_urb->dev->dev,
1838                         "%s failed submit ctrl_urb %d type %d", __func__,
1839                         result, type);
1840                 return result;
1841         }
1842
1843         /* done */
1844         return size;
1845 }
1846
1847 /* called by intr_callback when read occurs */
1848 static int hso_mux_serial_read(struct hso_serial *serial)
1849 {
1850         if (!serial)
1851                 return -EINVAL;
1852
1853         /* clean data */
1854         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1855         /* make the request */
1856
1857         if (serial->num_rx_urbs != 1) {
1858                 dev_err(&serial->parent->interface->dev,
1859                         "ERROR: mux'd reads with multiple buffers "
1860                         "not possible\n");
1861                 return 0;
1862         }
1863         return mux_device_request(serial,
1864                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1865                                   serial->parent->port_spec & HSO_PORT_MASK,
1866                                   serial->rx_urb[0],
1867                                   &serial->ctrl_req_rx,
1868                                   serial->rx_data[0], serial->rx_data_length);
1869 }
1870
1871 /* used for muxed serial port callback (muxed serial read) */
1872 static void intr_callback(struct urb *urb)
1873 {
1874         struct hso_shared_int *shared_int = urb->context;
1875         struct hso_serial *serial;
1876         unsigned char *port_req;
1877         int status = urb->status;
1878         int i;
1879
1880         usb_mark_last_busy(urb->dev);
1881
1882         /* sanity check */
1883         if (!shared_int)
1884                 return;
1885
1886         /* status check */
1887         if (status) {
1888                 log_usb_status(status, __func__);
1889                 return;
1890         }
1891         D4("\n--- Got intr callback 0x%02X ---", status);
1892
1893         /* what request? */
1894         port_req = urb->transfer_buffer;
1895         D4(" port_req = 0x%.2X\n", *port_req);
1896         /* loop over all muxed ports to find the one sending this */
1897         for (i = 0; i < 8; i++) {
1898                 /* max 8 channels on MUX */
1899                 if (*port_req & (1 << i)) {
1900                         serial = get_serial_by_shared_int_and_type(shared_int,
1901                                                                    (1 << i));
1902                         if (serial != NULL) {
1903                                 D1("Pending read interrupt on port %d\n", i);
1904                                 spin_lock(&serial->serial_lock);
1905                                 if (serial->rx_state == RX_IDLE) {
1906                                         /* Setup and send a ctrl req read on
1907                                          * port i */
1908                                 if (!serial->rx_urb_filled[0]) {
1909                                                 serial->rx_state = RX_SENT;
1910                                                 hso_mux_serial_read(serial);
1911                                         } else
1912                                                 serial->rx_state = RX_PENDING;
1913
1914                                 } else {
1915                                         D1("Already pending a read on "
1916                                            "port %d\n", i);
1917                                 }
1918                                 spin_unlock(&serial->serial_lock);
1919                         }
1920                 }
1921         }
1922         /* Resubmit interrupt urb */
1923         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1924 }
1925
1926 /* called for writing to muxed serial port */
1927 static int hso_mux_serial_write_data(struct hso_serial *serial)
1928 {
1929         if (NULL == serial)
1930                 return -EINVAL;
1931
1932         return mux_device_request(serial,
1933                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1934                                   serial->parent->port_spec & HSO_PORT_MASK,
1935                                   serial->tx_urb,
1936                                   &serial->ctrl_req_tx,
1937                                   serial->tx_data, serial->tx_data_count);
1938 }
1939
1940 /* write callback for Diag and CS port */
1941 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1942 {
1943         struct hso_serial *serial = urb->context;
1944         int status = urb->status;
1945         struct tty_struct *tty;
1946
1947         /* sanity check */
1948         if (!serial) {
1949                 D1("serial == NULL");
1950                 return;
1951         }
1952
1953         spin_lock(&serial->serial_lock);
1954         serial->tx_urb_used = 0;
1955         tty = tty_kref_get(serial->tty);
1956         spin_unlock(&serial->serial_lock);
1957         if (status) {
1958                 log_usb_status(status, __func__);
1959                 tty_kref_put(tty);
1960                 return;
1961         }
1962         hso_put_activity(serial->parent);
1963         if (tty) {
1964                 tty_wakeup(tty);
1965                 tty_kref_put(tty);
1966         }
1967         hso_kick_transmit(serial);
1968
1969         D1(" ");
1970         return;
1971 }
1972
1973 /* called for writing diag or CS serial port */
1974 static int hso_std_serial_write_data(struct hso_serial *serial)
1975 {
1976         int count = serial->tx_data_count;
1977         int result;
1978
1979         usb_fill_bulk_urb(serial->tx_urb,
1980                           serial->parent->usb,
1981                           usb_sndbulkpipe(serial->parent->usb,
1982                                           serial->out_endp->
1983                                           bEndpointAddress & 0x7F),
1984                           serial->tx_data, serial->tx_data_count,
1985                           hso_std_serial_write_bulk_callback, serial);
1986
1987         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1988         if (result) {
1989                 dev_warn(&serial->parent->usb->dev,
1990                          "Failed to submit urb - res %d\n", result);
1991                 return result;
1992         }
1993
1994         return count;
1995 }
1996
1997 /* callback after read or write on muxed serial port */
1998 static void ctrl_callback(struct urb *urb)
1999 {
2000         struct hso_serial *serial = urb->context;
2001         struct usb_ctrlrequest *req;
2002         int status = urb->status;
2003         struct tty_struct *tty;
2004
2005         /* sanity check */
2006         if (!serial)
2007                 return;
2008
2009         spin_lock(&serial->serial_lock);
2010         serial->tx_urb_used = 0;
2011         tty = tty_kref_get(serial->tty);
2012         spin_unlock(&serial->serial_lock);
2013         if (status) {
2014                 log_usb_status(status, __func__);
2015                 tty_kref_put(tty);
2016                 return;
2017         }
2018
2019         /* what request? */
2020         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2021         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2022         D4("Actual length of urb = %d\n", urb->actual_length);
2023         DUMP1(urb->transfer_buffer, urb->actual_length);
2024
2025         if (req->bRequestType ==
2026             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2027                 /* response to a read command */
2028                 serial->rx_urb_filled[0] = 1;
2029                 spin_lock(&serial->serial_lock);
2030                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2031                 spin_unlock(&serial->serial_lock);
2032         } else {
2033                 hso_put_activity(serial->parent);
2034                 if (tty)
2035                         tty_wakeup(tty);
2036                 /* response to a write command */
2037                 hso_kick_transmit(serial);
2038         }
2039         tty_kref_put(tty);
2040 }
2041
2042 /* handle RX data for serial port */
2043 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2044 {
2045         struct tty_struct *tty;
2046         int write_length_remaining = 0;
2047         int curr_write_len;
2048
2049         /* Sanity check */
2050         if (urb == NULL || serial == NULL) {
2051                 D1("serial = NULL");
2052                 return -2;
2053         }
2054
2055         /* All callers to put_rxbuf_data hold serial_lock */
2056         tty = tty_kref_get(serial->tty);
2057
2058         /* Push data to tty */
2059         if (tty) {
2060                 write_length_remaining = urb->actual_length -
2061                         serial->curr_rx_urb_offset;
2062                 D1("data to push to tty");
2063                 while (write_length_remaining) {
2064                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2065                                 tty_kref_put(tty);
2066                                 return -1;
2067                         }
2068                         curr_write_len =  tty_insert_flip_string
2069                                 (tty, urb->transfer_buffer +
2070                                  serial->curr_rx_urb_offset,
2071                                  write_length_remaining);
2072                         serial->curr_rx_urb_offset += curr_write_len;
2073                         write_length_remaining -= curr_write_len;
2074                         tty_flip_buffer_push(tty);
2075                 }
2076         }
2077         if (write_length_remaining == 0) {
2078                 serial->curr_rx_urb_offset = 0;
2079                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2080         }
2081         tty_kref_put(tty);
2082         return write_length_remaining;
2083 }
2084
2085
2086 /* Base driver functions */
2087
2088 static void hso_log_port(struct hso_device *hso_dev)
2089 {
2090         char *port_type;
2091         char port_dev[20];
2092
2093         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2094         case HSO_PORT_CONTROL:
2095                 port_type = "Control";
2096                 break;
2097         case HSO_PORT_APP:
2098                 port_type = "Application";
2099                 break;
2100         case HSO_PORT_GPS:
2101                 port_type = "GPS";
2102                 break;
2103         case HSO_PORT_GPS_CONTROL:
2104                 port_type = "GPS control";
2105                 break;
2106         case HSO_PORT_APP2:
2107                 port_type = "Application2";
2108                 break;
2109         case HSO_PORT_PCSC:
2110                 port_type = "PCSC";
2111                 break;
2112         case HSO_PORT_DIAG:
2113                 port_type = "Diagnostic";
2114                 break;
2115         case HSO_PORT_DIAG2:
2116                 port_type = "Diagnostic2";
2117                 break;
2118         case HSO_PORT_MODEM:
2119                 port_type = "Modem";
2120                 break;
2121         case HSO_PORT_NETWORK:
2122                 port_type = "Network";
2123                 break;
2124         default:
2125                 port_type = "Unknown";
2126                 break;
2127         }
2128         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2129                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2130         } else
2131                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2132                         dev2ser(hso_dev)->minor);
2133
2134         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2135                 port_type, port_dev);
2136 }
2137
2138 static int hso_start_net_device(struct hso_device *hso_dev)
2139 {
2140         int i, result = 0;
2141         struct hso_net *hso_net = dev2net(hso_dev);
2142
2143         if (!hso_net)
2144                 return -ENODEV;
2145
2146         /* send URBs for all read buffers */
2147         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2148
2149                 /* Prep a receive URB */
2150                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2151                                   hso_dev->usb,
2152                                   usb_rcvbulkpipe(hso_dev->usb,
2153                                                   hso_net->in_endp->
2154                                                   bEndpointAddress & 0x7F),
2155                                   hso_net->mux_bulk_rx_buf_pool[i],
2156                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2157                                   hso_net);
2158
2159                 /* Put it out there so the device can send us stuff */
2160                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2161                                         GFP_NOIO);
2162                 if (result)
2163                         dev_warn(&hso_dev->usb->dev,
2164                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2165                                 i, result);
2166         }
2167
2168         return result;
2169 }
2170
2171 static int hso_stop_net_device(struct hso_device *hso_dev)
2172 {
2173         int i;
2174         struct hso_net *hso_net = dev2net(hso_dev);
2175
2176         if (!hso_net)
2177                 return -ENODEV;
2178
2179         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2180                 if (hso_net->mux_bulk_rx_urb_pool[i])
2181                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2182
2183         }
2184         if (hso_net->mux_bulk_tx_urb)
2185                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2186
2187         return 0;
2188 }
2189
2190 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2191 {
2192         int i, result = 0;
2193         struct hso_serial *serial = dev2ser(hso_dev);
2194
2195         if (!serial)
2196                 return -ENODEV;
2197
2198         /* If it is not the MUX port fill in and submit a bulk urb (already
2199          * allocated in hso_serial_start) */
2200         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2201                 for (i = 0; i < serial->num_rx_urbs; i++) {
2202                         usb_fill_bulk_urb(serial->rx_urb[i],
2203                                           serial->parent->usb,
2204                                           usb_rcvbulkpipe(serial->parent->usb,
2205                                                           serial->in_endp->
2206                                                           bEndpointAddress &
2207                                                           0x7F),
2208                                           serial->rx_data[i],
2209                                           serial->rx_data_length,
2210                                           hso_std_serial_read_bulk_callback,
2211                                           serial);
2212                         result = usb_submit_urb(serial->rx_urb[i], flags);
2213                         if (result) {
2214                                 dev_warn(&serial->parent->usb->dev,
2215                                          "Failed to submit urb - res %d\n",
2216                                          result);
2217                                 break;
2218                         }
2219                 }
2220         } else {
2221                 mutex_lock(&serial->shared_int->shared_int_lock);
2222                 if (!serial->shared_int->use_count) {
2223                         result =
2224                             hso_mux_submit_intr_urb(serial->shared_int,
2225                                                     hso_dev->usb, flags);
2226                 }
2227                 serial->shared_int->use_count++;
2228                 mutex_unlock(&serial->shared_int->shared_int_lock);
2229         }
2230         if (serial->tiocmget)
2231                 tiocmget_submit_urb(serial,
2232                                     serial->tiocmget,
2233                                     serial->parent->usb);
2234         return result;
2235 }
2236
2237 static int hso_stop_serial_device(struct hso_device *hso_dev)
2238 {
2239         int i;
2240         struct hso_serial *serial = dev2ser(hso_dev);
2241         struct hso_tiocmget  *tiocmget;
2242
2243         if (!serial)
2244                 return -ENODEV;
2245
2246         for (i = 0; i < serial->num_rx_urbs; i++) {
2247                 if (serial->rx_urb[i]) {
2248                                 usb_kill_urb(serial->rx_urb[i]);
2249                                 serial->rx_urb_filled[i] = 0;
2250                 }
2251         }
2252         serial->curr_rx_urb_idx = 0;
2253         serial->curr_rx_urb_offset = 0;
2254
2255         if (serial->tx_urb)
2256                 usb_kill_urb(serial->tx_urb);
2257
2258         if (serial->shared_int) {
2259                 mutex_lock(&serial->shared_int->shared_int_lock);
2260                 if (serial->shared_int->use_count &&
2261                     (--serial->shared_int->use_count == 0)) {
2262                         struct urb *urb;
2263
2264                         urb = serial->shared_int->shared_intr_urb;
2265                         if (urb)
2266                                 usb_kill_urb(urb);
2267                 }
2268                 mutex_unlock(&serial->shared_int->shared_int_lock);
2269         }
2270         tiocmget = serial->tiocmget;
2271         if (tiocmget) {
2272                 wake_up_interruptible(&tiocmget->waitq);
2273                 usb_kill_urb(tiocmget->urb);
2274         }
2275
2276         return 0;
2277 }
2278
2279 static void hso_serial_common_free(struct hso_serial *serial)
2280 {
2281         int i;
2282
2283         if (serial->parent->dev)
2284                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2285
2286         tty_unregister_device(tty_drv, serial->minor);
2287
2288         for (i = 0; i < serial->num_rx_urbs; i++) {
2289                 /* unlink and free RX URB */
2290                 usb_free_urb(serial->rx_urb[i]);
2291                 /* free the RX buffer */
2292                 kfree(serial->rx_data[i]);
2293         }
2294
2295         /* unlink and free TX URB */
2296         usb_free_urb(serial->tx_urb);
2297         kfree(serial->tx_data);
2298 }
2299
2300 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2301                                     int rx_size, int tx_size)
2302 {
2303         struct device *dev;
2304         int minor;
2305         int i;
2306
2307         minor = get_free_serial_index();
2308         if (minor < 0)
2309                 goto exit;
2310
2311         /* register our minor number */
2312         serial->parent->dev = tty_register_device(tty_drv, minor,
2313                                         &serial->parent->interface->dev);
2314         dev = serial->parent->dev;
2315         dev_set_drvdata(dev, serial->parent);
2316         i = device_create_file(dev, &dev_attr_hsotype);
2317
2318         /* fill in specific data for later use */
2319         serial->minor = minor;
2320         serial->magic = HSO_SERIAL_MAGIC;
2321         spin_lock_init(&serial->serial_lock);
2322         serial->num_rx_urbs = num_urbs;
2323
2324         /* RX, allocate urb and initialize */
2325
2326         /* prepare our RX buffer */
2327         serial->rx_data_length = rx_size;
2328         for (i = 0; i < serial->num_rx_urbs; i++) {
2329                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2330                 if (!serial->rx_urb[i]) {
2331                         dev_err(dev, "Could not allocate urb?\n");
2332                         goto exit;
2333                 }
2334                 serial->rx_urb[i]->transfer_buffer = NULL;
2335                 serial->rx_urb[i]->transfer_buffer_length = 0;
2336                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2337                                              GFP_KERNEL);
2338                 if (!serial->rx_data[i]) {
2339                         dev_err(dev, "%s - Out of memory\n", __func__);
2340                         goto exit;
2341                 }
2342         }
2343
2344         /* TX, allocate urb and initialize */
2345         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2346         if (!serial->tx_urb) {
2347                 dev_err(dev, "Could not allocate urb?\n");
2348                 goto exit;
2349         }
2350         serial->tx_urb->transfer_buffer = NULL;
2351         serial->tx_urb->transfer_buffer_length = 0;
2352         /* prepare our TX buffer */
2353         serial->tx_data_count = 0;
2354         serial->tx_buffer_count = 0;
2355         serial->tx_data_length = tx_size;
2356         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2357         if (!serial->tx_data) {
2358                 dev_err(dev, "%s - Out of memory", __func__);
2359                 goto exit;
2360         }
2361         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2362         if (!serial->tx_buffer) {
2363                 dev_err(dev, "%s - Out of memory", __func__);
2364                 goto exit;
2365         }
2366
2367         return 0;
2368 exit:
2369         hso_serial_common_free(serial);
2370         return -1;
2371 }
2372
2373 /* Creates a general hso device */
2374 static struct hso_device *hso_create_device(struct usb_interface *intf,
2375                                             int port_spec)
2376 {
2377         struct hso_device *hso_dev;
2378
2379         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2380         if (!hso_dev)
2381                 return NULL;
2382
2383         hso_dev->port_spec = port_spec;
2384         hso_dev->usb = interface_to_usbdev(intf);
2385         hso_dev->interface = intf;
2386         kref_init(&hso_dev->ref);
2387         mutex_init(&hso_dev->mutex);
2388
2389         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2390         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2391
2392         return hso_dev;
2393 }
2394
2395 /* Removes a network device in the network device table */
2396 static int remove_net_device(struct hso_device *hso_dev)
2397 {
2398         int i;
2399
2400         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2401                 if (network_table[i] == hso_dev) {
2402                         network_table[i] = NULL;
2403                         break;
2404                 }
2405         }
2406         if (i == HSO_MAX_NET_DEVICES)
2407                 return -1;
2408         return 0;
2409 }
2410
2411 /* Frees our network device */
2412 static void hso_free_net_device(struct hso_device *hso_dev)
2413 {
2414         int i;
2415         struct hso_net *hso_net = dev2net(hso_dev);
2416
2417         if (!hso_net)
2418                 return;
2419
2420         remove_net_device(hso_net->parent);
2421
2422         if (hso_net->net) {
2423                 unregister_netdev(hso_net->net);
2424                 free_netdev(hso_net->net);
2425         }
2426
2427         /* start freeing */
2428         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2429                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2430                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2431                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2432         }
2433         usb_free_urb(hso_net->mux_bulk_tx_urb);
2434         kfree(hso_net->mux_bulk_tx_buf);
2435         hso_net->mux_bulk_tx_buf = NULL;
2436
2437         kfree(hso_dev);
2438 }
2439
2440 static const struct net_device_ops hso_netdev_ops = {
2441         .ndo_open       = hso_net_open,
2442         .ndo_stop       = hso_net_close,
2443         .ndo_start_xmit = hso_net_start_xmit,
2444         .ndo_tx_timeout = hso_net_tx_timeout,
2445 };
2446
2447 /* initialize the network interface */
2448 static void hso_net_init(struct net_device *net)
2449 {
2450         struct hso_net *hso_net = netdev_priv(net);
2451
2452         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2453
2454         /* fill in the other fields */
2455         net->netdev_ops = &hso_netdev_ops;
2456         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2457         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2458         net->type = ARPHRD_NONE;
2459         net->mtu = DEFAULT_MTU - 14;
2460         net->tx_queue_len = 10;
2461         SET_ETHTOOL_OPS(net, &ops);
2462
2463         /* and initialize the semaphore */
2464         spin_lock_init(&hso_net->net_lock);
2465 }
2466
2467 /* Adds a network device in the network device table */
2468 static int add_net_device(struct hso_device *hso_dev)
2469 {
2470         int i;
2471
2472         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2473                 if (network_table[i] == NULL) {
2474                         network_table[i] = hso_dev;
2475                         break;
2476                 }
2477         }
2478         if (i == HSO_MAX_NET_DEVICES)
2479                 return -1;
2480         return 0;
2481 }
2482
2483 static int hso_rfkill_set_block(void *data, bool blocked)
2484 {
2485         struct hso_device *hso_dev = data;
2486         int enabled = !blocked;
2487         int rv;
2488
2489         mutex_lock(&hso_dev->mutex);
2490         if (hso_dev->usb_gone)
2491                 rv = 0;
2492         else
2493                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2494                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2495                                        USB_CTRL_SET_TIMEOUT);
2496         mutex_unlock(&hso_dev->mutex);
2497         return rv;
2498 }
2499
2500 static const struct rfkill_ops hso_rfkill_ops = {
2501         .set_block = hso_rfkill_set_block,
2502 };
2503
2504 /* Creates and sets up everything for rfkill */
2505 static void hso_create_rfkill(struct hso_device *hso_dev,
2506                              struct usb_interface *interface)
2507 {
2508         struct hso_net *hso_net = dev2net(hso_dev);
2509         struct device *dev = &hso_net->net->dev;
2510         char *rfkn;
2511
2512         rfkn = kzalloc(20, GFP_KERNEL);
2513         if (!rfkn)
2514                 dev_err(dev, "%s - Out of memory\n", __func__);
2515
2516         snprintf(rfkn, 20, "hso-%d",
2517                  interface->altsetting->desc.bInterfaceNumber);
2518
2519         hso_net->rfkill = rfkill_alloc(rfkn,
2520                                        &interface_to_usbdev(interface)->dev,
2521                                        RFKILL_TYPE_WWAN,
2522                                        &hso_rfkill_ops, hso_dev);
2523         if (!hso_net->rfkill) {
2524                 dev_err(dev, "%s - Out of memory\n", __func__);
2525                 kfree(rfkn);
2526                 return;
2527         }
2528         if (rfkill_register(hso_net->rfkill) < 0) {
2529                 rfkill_destroy(hso_net->rfkill);
2530                 kfree(rfkn);
2531                 hso_net->rfkill = NULL;
2532                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2533                 return;
2534         }
2535 }
2536
2537 /* Creates our network device */
2538 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2539                                                 int port_spec)
2540 {
2541         int result, i;
2542         struct net_device *net;
2543         struct hso_net *hso_net;
2544         struct hso_device *hso_dev;
2545
2546         hso_dev = hso_create_device(interface, port_spec);
2547         if (!hso_dev)
2548                 return NULL;
2549
2550         /* allocate our network device, then we can put in our private data */
2551         /* call hso_net_init to do the basic initialization */
2552         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2553         if (!net) {
2554                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2555                 goto exit;
2556         }
2557
2558         hso_net = netdev_priv(net);
2559
2560         hso_dev->port_data.dev_net = hso_net;
2561         hso_net->net = net;
2562         hso_net->parent = hso_dev;
2563
2564         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2565                                       USB_DIR_IN);
2566         if (!hso_net->in_endp) {
2567                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2568                 goto exit;
2569         }
2570         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2571                                        USB_DIR_OUT);
2572         if (!hso_net->out_endp) {
2573                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2574                 goto exit;
2575         }
2576         SET_NETDEV_DEV(net, &interface->dev);
2577
2578         /* registering our net device */
2579         result = register_netdev(net);
2580         if (result) {
2581                 dev_err(&interface->dev, "Failed to register device\n");
2582                 goto exit;
2583         }
2584
2585         /* start allocating */
2586         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2587                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2588                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2589                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2590                         goto exit;
2591                 }
2592                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2593                                                            GFP_KERNEL);
2594                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2595                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2596                         goto exit;
2597                 }
2598         }
2599         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2600         if (!hso_net->mux_bulk_tx_urb) {
2601                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2602                 goto exit;
2603         }
2604         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2605         if (!hso_net->mux_bulk_tx_buf) {
2606                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2607                 goto exit;
2608         }
2609
2610         add_net_device(hso_dev);
2611
2612         hso_log_port(hso_dev);
2613
2614         hso_create_rfkill(hso_dev, interface);
2615
2616         return hso_dev;
2617 exit:
2618         hso_free_net_device(hso_dev);
2619         return NULL;
2620 }
2621
2622 static void hso_free_tiomget(struct hso_serial *serial)
2623 {
2624         struct hso_tiocmget *tiocmget = serial->tiocmget;
2625         if (tiocmget) {
2626                 if (tiocmget->urb) {
2627                         usb_free_urb(tiocmget->urb);
2628                         tiocmget->urb = NULL;
2629                 }
2630                 serial->tiocmget = NULL;
2631                 kfree(tiocmget);
2632
2633         }
2634 }
2635
2636 /* Frees an AT channel ( goes for both mux and non-mux ) */
2637 static void hso_free_serial_device(struct hso_device *hso_dev)
2638 {
2639         struct hso_serial *serial = dev2ser(hso_dev);
2640
2641         if (!serial)
2642                 return;
2643         set_serial_by_index(serial->minor, NULL);
2644
2645         hso_serial_common_free(serial);
2646
2647         if (serial->shared_int) {
2648                 mutex_lock(&serial->shared_int->shared_int_lock);
2649                 if (--serial->shared_int->ref_count == 0)
2650                         hso_free_shared_int(serial->shared_int);
2651                 else
2652                         mutex_unlock(&serial->shared_int->shared_int_lock);
2653         }
2654         hso_free_tiomget(serial);
2655         kfree(serial);
2656         kfree(hso_dev);
2657 }
2658
2659 /* Creates a bulk AT channel */
2660 static struct hso_device *hso_create_bulk_serial_device(
2661                         struct usb_interface *interface, int port)
2662 {
2663         struct hso_device *hso_dev;
2664         struct hso_serial *serial;
2665         int num_urbs;
2666         struct hso_tiocmget *tiocmget;
2667
2668         hso_dev = hso_create_device(interface, port);
2669         if (!hso_dev)
2670                 return NULL;
2671
2672         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2673         if (!serial)
2674                 goto exit;
2675
2676         serial->parent = hso_dev;
2677         hso_dev->port_data.dev_serial = serial;
2678
2679         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2680                 num_urbs = 2;
2681                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2682                                            GFP_KERNEL);
2683                 /* it isn't going to break our heart if serial->tiocmget
2684                  *  allocation fails don't bother checking this.
2685                  */
2686                 if (serial->tiocmget) {
2687                         tiocmget = serial->tiocmget;
2688                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2689                         if (tiocmget->urb) {
2690                                 mutex_init(&tiocmget->mutex);
2691                                 init_waitqueue_head(&tiocmget->waitq);
2692                                 tiocmget->endp = hso_get_ep(
2693                                         interface,
2694                                         USB_ENDPOINT_XFER_INT,
2695                                         USB_DIR_IN);
2696                         } else
2697                                 hso_free_tiomget(serial);
2698                 }
2699         }
2700         else
2701                 num_urbs = 1;
2702
2703         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2704                                      BULK_URB_TX_SIZE))
2705                 goto exit;
2706
2707         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2708                                      USB_DIR_IN);
2709         if (!serial->in_endp) {
2710                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2711                 goto exit2;
2712         }
2713
2714         if (!
2715             (serial->out_endp =
2716              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2717                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2718                 goto exit2;
2719         }
2720
2721         serial->write_data = hso_std_serial_write_data;
2722
2723         /* and record this serial */
2724         set_serial_by_index(serial->minor, serial);
2725
2726         /* setup the proc dirs and files if needed */
2727         hso_log_port(hso_dev);
2728
2729         /* done, return it */
2730         return hso_dev;
2731
2732 exit2:
2733         hso_serial_common_free(serial);
2734 exit:
2735         hso_free_tiomget(serial);
2736         kfree(serial);
2737         kfree(hso_dev);
2738         return NULL;
2739 }
2740
2741 /* Creates a multiplexed AT channel */
2742 static
2743 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2744                                                 int port,
2745                                                 struct hso_shared_int *mux)
2746 {
2747         struct hso_device *hso_dev;
2748         struct hso_serial *serial;
2749         int port_spec;
2750
2751         port_spec = HSO_INTF_MUX;
2752         port_spec &= ~HSO_PORT_MASK;
2753
2754         port_spec |= hso_mux_to_port(port);
2755         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2756                 return NULL;
2757
2758         hso_dev = hso_create_device(interface, port_spec);
2759         if (!hso_dev)
2760                 return NULL;
2761
2762         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2763         if (!serial)
2764                 goto exit;
2765
2766         hso_dev->port_data.dev_serial = serial;
2767         serial->parent = hso_dev;
2768
2769         if (hso_serial_common_create
2770             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2771                 goto exit;
2772
2773         serial->tx_data_length--;
2774         serial->write_data = hso_mux_serial_write_data;
2775
2776         serial->shared_int = mux;
2777         mutex_lock(&serial->shared_int->shared_int_lock);
2778         serial->shared_int->ref_count++;
2779         mutex_unlock(&serial->shared_int->shared_int_lock);
2780
2781         /* and record this serial */
2782         set_serial_by_index(serial->minor, serial);
2783
2784         /* setup the proc dirs and files if needed */
2785         hso_log_port(hso_dev);
2786
2787         /* done, return it */
2788         return hso_dev;
2789
2790 exit:
2791         if (serial) {
2792                 tty_unregister_device(tty_drv, serial->minor);
2793                 kfree(serial);
2794         }
2795         if (hso_dev)
2796                 kfree(hso_dev);
2797         return NULL;
2798
2799 }
2800
2801 static void hso_free_shared_int(struct hso_shared_int *mux)
2802 {
2803         usb_free_urb(mux->shared_intr_urb);
2804         kfree(mux->shared_intr_buf);
2805         mutex_unlock(&mux->shared_int_lock);
2806         kfree(mux);
2807 }
2808
2809 static
2810 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2811 {
2812         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2813
2814         if (!mux)
2815                 return NULL;
2816
2817         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2818                                     USB_DIR_IN);
2819         if (!mux->intr_endp) {
2820                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2821                 goto exit;
2822         }
2823
2824         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2825         if (!mux->shared_intr_urb) {
2826                 dev_err(&interface->dev, "Could not allocate intr urb?");
2827                 goto exit;
2828         }
2829         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2830                                        GFP_KERNEL);
2831         if (!mux->shared_intr_buf) {
2832                 dev_err(&interface->dev, "Could not allocate intr buf?");
2833                 goto exit;
2834         }
2835
2836         mutex_init(&mux->shared_int_lock);
2837
2838         return mux;
2839
2840 exit:
2841         kfree(mux->shared_intr_buf);
2842         usb_free_urb(mux->shared_intr_urb);
2843         kfree(mux);
2844         return NULL;
2845 }
2846
2847 /* Gets the port spec for a certain interface */
2848 static int hso_get_config_data(struct usb_interface *interface)
2849 {
2850         struct usb_device *usbdev = interface_to_usbdev(interface);
2851         u8 config_data[17];
2852         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2853         s32 result;
2854
2855         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2856                             0x86, 0xC0, 0, 0, config_data, 17,
2857                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2858                 return -EIO;
2859         }
2860
2861         switch (config_data[if_num]) {
2862         case 0x0:
2863                 result = 0;
2864                 break;
2865         case 0x1:
2866                 result = HSO_PORT_DIAG;
2867                 break;
2868         case 0x2:
2869                 result = HSO_PORT_GPS;
2870                 break;
2871         case 0x3:
2872                 result = HSO_PORT_GPS_CONTROL;
2873                 break;
2874         case 0x4:
2875                 result = HSO_PORT_APP;
2876                 break;
2877         case 0x5:
2878                 result = HSO_PORT_APP2;
2879                 break;
2880         case 0x6:
2881                 result = HSO_PORT_CONTROL;
2882                 break;
2883         case 0x7:
2884                 result = HSO_PORT_NETWORK;
2885                 break;
2886         case 0x8:
2887                 result = HSO_PORT_MODEM;
2888                 break;
2889         case 0x9:
2890                 result = HSO_PORT_MSD;
2891                 break;
2892         case 0xa:
2893                 result = HSO_PORT_PCSC;
2894                 break;
2895         case 0xb:
2896                 result = HSO_PORT_VOICE;
2897                 break;
2898         default:
2899                 result = 0;
2900         }
2901
2902         if (result)
2903                 result |= HSO_INTF_BULK;
2904
2905         if (config_data[16] & 0x1)
2906                 result |= HSO_INFO_CRC_BUG;
2907
2908         return result;
2909 }
2910
2911 /* called once for each interface upon device insertion */
2912 static int hso_probe(struct usb_interface *interface,
2913                      const struct usb_device_id *id)
2914 {
2915         int mux, i, if_num, port_spec;
2916         unsigned char port_mask;
2917         struct hso_device *hso_dev = NULL;
2918         struct hso_shared_int *shared_int;
2919         struct hso_device *tmp_dev = NULL;
2920
2921         if_num = interface->altsetting->desc.bInterfaceNumber;
2922
2923         /* Get the interface/port specification from either driver_info or from
2924          * the device itself */
2925         if (id->driver_info)
2926                 port_spec = ((u32 *)(id->driver_info))[if_num];
2927         else
2928                 port_spec = hso_get_config_data(interface);
2929
2930         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2931                 dev_err(&interface->dev, "Not our interface\n");
2932                 return -ENODEV;
2933         }
2934         /* Check if we need to switch to alt interfaces prior to port
2935          * configuration */
2936         if (interface->num_altsetting > 1)
2937                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2938         interface->needs_remote_wakeup = 1;
2939
2940         /* Allocate new hso device(s) */
2941         switch (port_spec & HSO_INTF_MASK) {
2942         case HSO_INTF_MUX:
2943                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2944                         /* Create the network device */
2945                         if (!disable_net) {
2946                                 hso_dev = hso_create_net_device(interface,
2947                                                                 port_spec);
2948                                 if (!hso_dev)
2949                                         goto exit;
2950                                 tmp_dev = hso_dev;
2951                         }
2952                 }
2953
2954                 if (hso_get_mux_ports(interface, &port_mask))
2955                         /* TODO: de-allocate everything */
2956                         goto exit;
2957
2958                 shared_int = hso_create_shared_int(interface);
2959                 if (!shared_int)
2960                         goto exit;
2961
2962                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2963                         if (port_mask & i) {
2964                                 hso_dev = hso_create_mux_serial_device(
2965                                                 interface, i, shared_int);
2966                                 if (!hso_dev)
2967                                         goto exit;
2968                         }
2969                 }
2970
2971                 if (tmp_dev)
2972                         hso_dev = tmp_dev;
2973                 break;
2974
2975         case HSO_INTF_BULK:
2976                 /* It's a regular bulk interface */
2977                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2978                     && !disable_net)
2979                         hso_dev = hso_create_net_device(interface, port_spec);
2980                 else
2981                         hso_dev =
2982                             hso_create_bulk_serial_device(interface, port_spec);
2983                 if (!hso_dev)
2984                         goto exit;
2985                 break;
2986         default:
2987                 goto exit;
2988         }
2989
2990         /* save our data pointer in this device */
2991         usb_set_intfdata(interface, hso_dev);
2992
2993         /* done */
2994         return 0;
2995 exit:
2996         hso_free_interface(interface);
2997         return -ENODEV;
2998 }
2999
3000 /* device removed, cleaning up */
3001 static void hso_disconnect(struct usb_interface *interface)
3002 {
3003         hso_free_interface(interface);
3004
3005         /* remove reference of our private data */
3006         usb_set_intfdata(interface, NULL);
3007 }
3008
3009 static void async_get_intf(struct work_struct *data)
3010 {
3011         struct hso_device *hso_dev =
3012             container_of(data, struct hso_device, async_get_intf);
3013         usb_autopm_get_interface(hso_dev->interface);
3014 }
3015
3016 static void async_put_intf(struct work_struct *data)
3017 {
3018         struct hso_device *hso_dev =
3019             container_of(data, struct hso_device, async_put_intf);
3020         usb_autopm_put_interface(hso_dev->interface);
3021 }
3022
3023 static int hso_get_activity(struct hso_device *hso_dev)
3024 {
3025         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3026                 if (!hso_dev->is_active) {
3027                         hso_dev->is_active = 1;
3028                         schedule_work(&hso_dev->async_get_intf);
3029                 }
3030         }
3031
3032         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3033                 return -EAGAIN;
3034
3035         usb_mark_last_busy(hso_dev->usb);
3036
3037         return 0;
3038 }
3039
3040 static int hso_put_activity(struct hso_device *hso_dev)
3041 {
3042         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3043                 if (hso_dev->is_active) {
3044                         hso_dev->is_active = 0;
3045                         schedule_work(&hso_dev->async_put_intf);
3046                         return -EAGAIN;
3047                 }
3048         }
3049         hso_dev->is_active = 0;
3050         return 0;
3051 }
3052
3053 /* called by kernel when we need to suspend device */
3054 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3055 {
3056         int i, result;
3057
3058         /* Stop all serial ports */
3059         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3060                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3061                         result = hso_stop_serial_device(serial_table[i]);
3062                         if (result)
3063                                 goto out;
3064                 }
3065         }
3066
3067         /* Stop all network ports */
3068         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3069                 if (network_table[i] &&
3070                     (network_table[i]->interface == iface)) {
3071                         result = hso_stop_net_device(network_table[i]);
3072                         if (result)
3073                                 goto out;
3074                 }
3075         }
3076
3077 out:
3078         return 0;
3079 }
3080
3081 /* called by kernel when we need to resume device */
3082 static int hso_resume(struct usb_interface *iface)
3083 {
3084         int i, result = 0;
3085         struct hso_net *hso_net;
3086
3087         /* Start all serial ports */
3088         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3089                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3090                         if (dev2ser(serial_table[i])->open_count) {
3091                                 result =
3092                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3093                                 hso_kick_transmit(dev2ser(serial_table[i]));
3094                                 if (result)
3095                                         goto out;
3096                         }
3097                 }
3098         }
3099
3100         /* Start all network ports */
3101         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3102                 if (network_table[i] &&
3103                     (network_table[i]->interface == iface)) {
3104                         hso_net = dev2net(network_table[i]);
3105                         if (hso_net->flags & IFF_UP) {
3106                                 /* First transmit any lingering data,
3107                                    then restart the device. */
3108                                 if (hso_net->skb_tx_buf) {
3109                                         dev_dbg(&iface->dev,
3110                                                 "Transmitting"
3111                                                 " lingering data\n");
3112                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3113                                                            hso_net->net);
3114                                         hso_net->skb_tx_buf = NULL;
3115                                 }
3116                                 result = hso_start_net_device(network_table[i]);
3117                                 if (result)
3118                                         goto out;
3119                         }
3120                 }
3121         }
3122
3123 out:
3124         return result;
3125 }
3126
3127 static void hso_serial_ref_free(struct kref *ref)
3128 {
3129         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3130
3131         hso_free_serial_device(hso_dev);
3132 }
3133
3134 static void hso_free_interface(struct usb_interface *interface)
3135 {
3136         struct hso_serial *hso_dev;
3137         struct tty_struct *tty;
3138         int i;
3139
3140         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3141                 if (serial_table[i]
3142                     && (serial_table[i]->interface == interface)) {
3143                         hso_dev = dev2ser(serial_table[i]);
3144                         spin_lock_irq(&hso_dev->serial_lock);
3145                         tty = tty_kref_get(hso_dev->tty);
3146                         spin_unlock_irq(&hso_dev->serial_lock);
3147                         if (tty)
3148                                 tty_hangup(tty);
3149                         mutex_lock(&hso_dev->parent->mutex);
3150                         tty_kref_put(tty);
3151                         hso_dev->parent->usb_gone = 1;
3152                         mutex_unlock(&hso_dev->parent->mutex);
3153                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3154                 }
3155         }
3156
3157         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3158                 if (network_table[i]
3159                     && (network_table[i]->interface == interface)) {
3160                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3161                         /* hso_stop_net_device doesn't stop the net queue since
3162                          * traffic needs to start it again when suspended */
3163                         netif_stop_queue(dev2net(network_table[i])->net);
3164                         hso_stop_net_device(network_table[i]);
3165                         cancel_work_sync(&network_table[i]->async_put_intf);
3166                         cancel_work_sync(&network_table[i]->async_get_intf);
3167                         if (rfk) {
3168                                 rfkill_unregister(rfk);
3169                                 rfkill_destroy(rfk);
3170                         }
3171                         hso_free_net_device(network_table[i]);
3172                 }
3173         }
3174 }
3175
3176 /* Helper functions */
3177
3178 /* Get the endpoint ! */
3179 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3180                                                   int type, int dir)
3181 {
3182         int i;
3183         struct usb_host_interface *iface = intf->cur_altsetting;
3184         struct usb_endpoint_descriptor *endp;
3185
3186         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3187                 endp = &iface->endpoint[i].desc;
3188                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3189                     (usb_endpoint_type(endp) == type))
3190                         return endp;
3191         }
3192
3193         return NULL;
3194 }
3195
3196 /* Get the byte that describes which ports are enabled */
3197 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3198 {
3199         int i;
3200         struct usb_host_interface *iface = intf->cur_altsetting;
3201
3202         if (iface->extralen == 3) {
3203                 *ports = iface->extra[2];
3204                 return 0;
3205         }
3206
3207         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3208                 if (iface->endpoint[i].extralen == 3) {
3209                         *ports = iface->endpoint[i].extra[2];
3210                         return 0;
3211                 }
3212         }
3213
3214         return -1;
3215 }
3216
3217 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3218 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3219                                    struct usb_device *usb, gfp_t gfp)
3220 {
3221         int result;
3222
3223         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3224                          usb_rcvintpipe(usb,
3225                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3226                          shared_int->shared_intr_buf,
3227                          shared_int->intr_endp->wMaxPacketSize,
3228                          intr_callback, shared_int,
3229                          shared_int->intr_endp->bInterval);
3230
3231         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3232         if (result)
3233                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3234                         result);
3235
3236         return result;
3237 }
3238
3239 /* operations setup of the serial interface */
3240 static const struct tty_operations hso_serial_ops = {
3241         .open = hso_serial_open,
3242         .close = hso_serial_close,
3243         .write = hso_serial_write,
3244         .write_room = hso_serial_write_room,
3245         .ioctl = hso_serial_ioctl,
3246         .set_termios = hso_serial_set_termios,
3247         .chars_in_buffer = hso_serial_chars_in_buffer,
3248         .tiocmget = hso_serial_tiocmget,
3249         .tiocmset = hso_serial_tiocmset,
3250         .unthrottle = hso_unthrottle
3251 };
3252
3253 static struct usb_driver hso_driver = {
3254         .name = driver_name,
3255         .probe = hso_probe,
3256         .disconnect = hso_disconnect,
3257         .id_table = hso_ids,
3258         .suspend = hso_suspend,
3259         .resume = hso_resume,
3260         .reset_resume = hso_resume,
3261         .supports_autosuspend = 1,
3262 };
3263
3264 static int __init hso_init(void)
3265 {
3266         int i;
3267         int result;
3268
3269         /* put it in the log */
3270         printk(KERN_INFO "hso: %s\n", version);
3271
3272         /* Initialise the serial table semaphore and table */
3273         spin_lock_init(&serial_table_lock);
3274         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3275                 serial_table[i] = NULL;
3276
3277         /* allocate our driver using the proper amount of supported minors */
3278         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3279         if (!tty_drv)
3280                 return -ENOMEM;
3281
3282         /* fill in all needed values */
3283         tty_drv->magic = TTY_DRIVER_MAGIC;
3284         tty_drv->owner = THIS_MODULE;
3285         tty_drv->driver_name = driver_name;
3286         tty_drv->name = tty_filename;
3287
3288         /* if major number is provided as parameter, use that one */
3289         if (tty_major)
3290                 tty_drv->major = tty_major;
3291
3292         tty_drv->minor_start = 0;
3293         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3294         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3295         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3296         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3297         tty_drv->init_termios = tty_std_termios;
3298         hso_init_termios(&tty_drv->init_termios);
3299         tty_set_operations(tty_drv, &hso_serial_ops);
3300
3301         /* register the tty driver */
3302         result = tty_register_driver(tty_drv);
3303         if (result) {
3304                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3305                         __func__, result);
3306                 return result;
3307         }
3308
3309         /* register this module as an usb driver */
3310         result = usb_register(&hso_driver);
3311         if (result) {
3312                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3313                         result);
3314                 /* cleanup serial interface */
3315                 tty_unregister_driver(tty_drv);
3316                 return result;
3317         }
3318
3319         /* done */
3320         return 0;
3321 }
3322
3323 static void __exit hso_exit(void)
3324 {
3325         printk(KERN_INFO "hso: unloaded\n");
3326
3327         tty_unregister_driver(tty_drv);
3328         /* deregister the usb driver */
3329         usb_deregister(&hso_driver);
3330 }
3331
3332 /* Module definitions */
3333 module_init(hso_init);
3334 module_exit(hso_exit);
3335
3336 MODULE_AUTHOR(MOD_AUTHOR);
3337 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3338 MODULE_LICENSE(MOD_LICENSE);
3339 MODULE_INFO(Version, DRIVER_VERSION);
3340
3341 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3342 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3343 module_param(debug, int, S_IRUGO | S_IWUSR);
3344
3345 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3346 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3347 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3348
3349 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3350 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3351 module_param(disable_net, int, S_IRUGO | S_IWUSR);