drivers/net/usb/hso.c

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