drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define DRIVER_VERSION                  "1.2"
  77 #define MOD_AUTHOR                      "Option Wireless"
  78 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  79 #define MOD_LICENSE                     "GPL"
  80
  81 #define HSO_MAX_NET_DEVICES             10
  82 #define HSO__MAX_MTU                    2048
  83 #define DEFAULT_MTU                     1500
  84 #define DEFAULT_MRU                     1500
  85
  86 #define CTRL_URB_RX_SIZE                1024
  87 #define CTRL_URB_TX_SIZE                64
  88
  89 #define BULK_URB_RX_SIZE                4096
  90 #define BULK_URB_TX_SIZE                8192
  91
  92 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  94 #define MUX_BULK_RX_BUF_COUNT           4
  95 #define USB_TYPE_OPTION_VENDOR          0x20
  96
  97 /* These definitions are used with the struct hso_net flags element */
  98 /* - use *_bit operations on it. (bit indices not values.) */
  99 #define HSO_NET_RUNNING                 0
 100
 101 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 102
 103 #define HSO_SERIAL_MAGIC                0x48534f31
 104
 105 /* Number of ttys to handle */
 106 #define HSO_SERIAL_TTY_MINORS           256
 107
 108 #define MAX_RX_URBS                     2
 109
 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 111 {
 112         if (tty)
 113                 return tty->driver_data;
 114         return NULL;
 115 }
 116
 117 /*****************************************************************************/
 118 /* Debugging functions                                                       */
 119 /*****************************************************************************/
 120 #define D__(lvl_, fmt, arg...)                          \
 121         do {                                            \
 122                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 123                        __LINE__, __func__, ## arg);     \
 124         } while (0)
 125
 126 #define D_(lvl, args...)                                \
 127         do {                                            \
 128                 if (lvl & debug)                        \
 129                         D__(KERN_INFO, args);           \
 130         } while (0)
 131
 132 #define D1(args...)     D_(0x01, ##args)
 133 #define D2(args...)     D_(0x02, ##args)
 134 #define D3(args...)     D_(0x04, ##args)
 135 #define D4(args...)     D_(0x08, ##args)
 136 #define D5(args...)     D_(0x10, ##args)
 137
 138 /*****************************************************************************/
 139 /* Enumerators                                                               */
 140 /*****************************************************************************/
 141 enum pkt_parse_state {
 142         WAIT_IP,
 143         WAIT_DATA,
 144         WAIT_SYNC
 145 };
 146
 147 /*****************************************************************************/
 148 /* Structs                                                                   */
 149 /*****************************************************************************/
 150
 151 struct hso_shared_int {
 152         struct usb_endpoint_descriptor *intr_endp;
 153         void *shared_intr_buf;
 154         struct urb *shared_intr_urb;
 155         struct usb_device *usb;
 156         int use_count;
 157         int ref_count;
 158         struct mutex shared_int_lock;
 159 };
 160
 161 struct hso_net {
 162         struct hso_device *parent;
 163         struct net_device *net;
 164         struct rfkill *rfkill;
 165
 166         struct usb_endpoint_descriptor *in_endp;
 167         struct usb_endpoint_descriptor *out_endp;
 168
 169         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 170         struct urb *mux_bulk_tx_urb;
 171         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 172         void *mux_bulk_tx_buf;
 173
 174         struct sk_buff *skb_rx_buf;
 175         struct sk_buff *skb_tx_buf;
 176
 177         enum pkt_parse_state rx_parse_state;
 178         spinlock_t net_lock;
 179
 180         unsigned short rx_buf_size;
 181         unsigned short rx_buf_missing;
 182         struct iphdr rx_ip_hdr;
 183
 184         unsigned long flags;
 185 };
 186
 187 enum rx_ctrl_state{
 188         RX_IDLE,
 189         RX_SENT,
 190         RX_PENDING
 191 };
 192
 193 #define BM_REQUEST_TYPE (0xa1)
 194 #define B_NOTIFICATION  (0x20)
 195 #define W_VALUE         (0x0)
 196 #define W_INDEX         (0x2)
 197 #define W_LENGTH        (0x2)
 198
 199 #define B_OVERRUN       (0x1<<6)
 200 #define B_PARITY        (0x1<<5)
 201 #define B_FRAMING       (0x1<<4)
 202 #define B_RING_SIGNAL   (0x1<<3)
 203 #define B_BREAK         (0x1<<2)
 204 #define B_TX_CARRIER    (0x1<<1)
 205 #define B_RX_CARRIER    (0x1<<0)
 206
 207 struct hso_serial_state_notification {
 208         u8 bmRequestType;
 209         u8 bNotification;
 210         u16 wValue;
 211         u16 wIndex;
 212         u16 wLength;
 213         u16 UART_state_bitmap;
 214 } __attribute__((packed));
 215
 216 struct hso_tiocmget {
 217         struct mutex mutex;
 218         wait_queue_head_t waitq;
 219         int    intr_completed;
 220         struct usb_endpoint_descriptor *endp;
 221         struct urb *urb;
 222         struct hso_serial_state_notification serial_state_notification;
 223         u16    prev_UART_state_bitmap;
 224         struct uart_icount icount;
 225 };
 226
 227
 228 struct hso_serial {
 229         struct hso_device *parent;
 230         int magic;
 231         u8 minor;
 232
 233         struct hso_shared_int *shared_int;
 234
 235         /* rx/tx urb could be either a bulk urb or a control urb depending
 236            on which serial port it is used on. */
 237         struct urb *rx_urb[MAX_RX_URBS];
 238         u8 num_rx_urbs;
 239         u8 *rx_data[MAX_RX_URBS];
 240         u16 rx_data_length;     /* should contain allocated length */
 241
 242         struct urb *tx_urb;
 243         u8 *tx_data;
 244         u8 *tx_buffer;
 245         u16 tx_data_length;     /* should contain allocated length */
 246         u16 tx_data_count;
 247         u16 tx_buffer_count;
 248         struct usb_ctrlrequest ctrl_req_tx;
 249         struct usb_ctrlrequest ctrl_req_rx;
 250
 251         struct usb_endpoint_descriptor *in_endp;
 252         struct usb_endpoint_descriptor *out_endp;
 253
 254         enum rx_ctrl_state rx_state;
 255         u8 rts_state;
 256         u8 dtr_state;
 257         unsigned tx_urb_used:1;
 258
 259         /* from usb_serial_port */
 260         struct tty_struct *tty;
 261         int open_count;
 262         spinlock_t serial_lock;
 263
 264         int (*write_data) (struct hso_serial *serial);
 265         struct hso_tiocmget  *tiocmget;
 266         /* Hacks required to get flow control
 267          * working on the serial receive buffers
 268          * so as not to drop characters on the floor.
 269          */
 270         int  curr_rx_urb_idx;
 271         u16  curr_rx_urb_offset;
 272         u8   rx_urb_filled[MAX_RX_URBS];
 273         struct tasklet_struct unthrottle_tasklet;
 274         struct work_struct    retry_unthrottle_workqueue;
 275 };
 276
 277 struct hso_device {
 278         union {
 279                 struct hso_serial *dev_serial;
 280                 struct hso_net *dev_net;
 281         } port_data;
 282
 283         u32 port_spec;
 284
 285         u8 is_active;
 286         u8 usb_gone;
 287         struct work_struct async_get_intf;
 288         struct work_struct async_put_intf;
 289         struct work_struct reset_device;
 290
 291         struct usb_device *usb;
 292         struct usb_interface *interface;
 293
 294         struct device *dev;
 295         struct kref ref;
 296         struct mutex mutex;
 297 };
 298
 299 /* Type of interface */
 300 #define HSO_INTF_MASK           0xFF00
 301 #define HSO_INTF_MUX            0x0100
 302 #define HSO_INTF_BULK           0x0200
 303
 304 /* Type of port */
 305 #define HSO_PORT_MASK           0xFF
 306 #define HSO_PORT_NO_PORT        0x0
 307 #define HSO_PORT_CONTROL        0x1
 308 #define HSO_PORT_APP            0x2
 309 #define HSO_PORT_GPS            0x3
 310 #define HSO_PORT_PCSC           0x4
 311 #define HSO_PORT_APP2           0x5
 312 #define HSO_PORT_GPS_CONTROL    0x6
 313 #define HSO_PORT_MSD            0x7
 314 #define HSO_PORT_VOICE          0x8
 315 #define HSO_PORT_DIAG2          0x9
 316 #define HSO_PORT_DIAG           0x10
 317 #define HSO_PORT_MODEM          0x11
 318 #define HSO_PORT_NETWORK        0x12
 319
 320 /* Additional device info */
 321 #define HSO_INFO_MASK           0xFF000000
 322 #define HSO_INFO_CRC_BUG        0x01000000
 323
 324 /*****************************************************************************/
 325 /* Prototypes                                                                */
 326 /*****************************************************************************/
 327 /* Serial driver functions */
 328 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 329                                unsigned int set, unsigned int clear);
 330 static void ctrl_callback(struct urb *urb);
 331 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 332 static void hso_kick_transmit(struct hso_serial *serial);
 333 /* Helper functions */
 334 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 335                                    struct usb_device *usb, gfp_t gfp);
 336 static void handle_usb_error(int status, const char *function,
 337                              struct hso_device *hso_dev);
 338 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 339                                                   int type, int dir);
 340 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 341 static void hso_free_interface(struct usb_interface *intf);
 342 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 343 static int hso_stop_serial_device(struct hso_device *hso_dev);
 344 static int hso_start_net_device(struct hso_device *hso_dev);
 345 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 346 static int hso_stop_net_device(struct hso_device *hso_dev);
 347 static void hso_serial_ref_free(struct kref *ref);
 348 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 349 static int hso_mux_serial_read(struct hso_serial *serial);
 350 static void async_get_intf(struct work_struct *data);
 351 static void async_put_intf(struct work_struct *data);
 352 static int hso_put_activity(struct hso_device *hso_dev);
 353 static int hso_get_activity(struct hso_device *hso_dev);
 354 static void tiocmget_intr_callback(struct urb *urb);
 355 static void reset_device(struct work_struct *data);
 356 /*****************************************************************************/
 357 /* Helping functions                                                         */
 358 /*****************************************************************************/
 359
 360 /* #define DEBUG */
 361
 362 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 363 {
 364         return hso_dev->port_data.dev_net;
 365 }
 366
 367 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 368 {
 369         return hso_dev->port_data.dev_serial;
 370 }
 371
 372 /* Debugging functions */
 373 #ifdef DEBUG
 374 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 375                      unsigned int len)
 376 {
 377         static char name[255];
 378
 379         sprintf(name, "hso[%d:%s]", line_count, func_name);
 380         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 381 }
 382
 383 #define DUMP(buf_, len_)        \
 384         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 385
 386 #define DUMP1(buf_, len_)                       \
 387         do {                                    \
 388                 if (0x01 & debug)               \
 389                         DUMP(buf_, len_);       \
 390         } while (0)
 391 #else
 392 #define DUMP(buf_, len_)
 393 #define DUMP1(buf_, len_)
 394 #endif
 395
 396 /* module parameters */
 397 static int debug;
 398 static int tty_major;
 399 static int disable_net;
 400
 401 /* driver info */
 402 static const char driver_name[] = "hso";
 403 static const char tty_filename[] = "ttyHS";
 404 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 405 /* the usb driver itself (registered in hso_init) */
 406 static struct usb_driver hso_driver;
 407 /* serial structures */
 408 static struct tty_driver *tty_drv;
 409 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 410 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 411 static spinlock_t serial_table_lock;
 412
 413 static const s32 default_port_spec[] = {
 414         HSO_INTF_MUX | HSO_PORT_NETWORK,
 415         HSO_INTF_BULK | HSO_PORT_DIAG,
 416         HSO_INTF_BULK | HSO_PORT_MODEM,
 417         0
 418 };
 419
 420 static const s32 icon321_port_spec[] = {
 421         HSO_INTF_MUX | HSO_PORT_NETWORK,
 422         HSO_INTF_BULK | HSO_PORT_DIAG2,
 423         HSO_INTF_BULK | HSO_PORT_MODEM,
 424         HSO_INTF_BULK | HSO_PORT_DIAG,
 425         0
 426 };
 427
 428 #define default_port_device(vendor, product)    \
 429         USB_DEVICE(vendor, product),    \
 430                 .driver_info = (kernel_ulong_t)default_port_spec
 431
 432 #define icon321_port_device(vendor, product)    \
 433         USB_DEVICE(vendor, product),    \
 434                 .driver_info = (kernel_ulong_t)icon321_port_spec
 435
 436 /* list of devices we support */
 437 static const struct usb_device_id hso_ids[] = {
 438         {default_port_device(0x0af0, 0x6711)},
 439         {default_port_device(0x0af0, 0x6731)},
 440         {default_port_device(0x0af0, 0x6751)},
 441         {default_port_device(0x0af0, 0x6771)},
 442         {default_port_device(0x0af0, 0x6791)},
 443         {default_port_device(0x0af0, 0x6811)},
 444         {default_port_device(0x0af0, 0x6911)},
 445         {default_port_device(0x0af0, 0x6951)},
 446         {default_port_device(0x0af0, 0x6971)},
 447         {default_port_device(0x0af0, 0x7011)},
 448         {default_port_device(0x0af0, 0x7031)},
 449         {default_port_device(0x0af0, 0x7051)},
 450         {default_port_device(0x0af0, 0x7071)},
 451         {default_port_device(0x0af0, 0x7111)},
 452         {default_port_device(0x0af0, 0x7211)},
 453         {default_port_device(0x0af0, 0x7251)},
 454         {default_port_device(0x0af0, 0x7271)},
 455         {default_port_device(0x0af0, 0x7311)},
 456         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 457         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 458         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 459         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 460         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 463         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 464         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 465         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 466         {USB_DEVICE(0x0af0, 0x7701)},
 467         {USB_DEVICE(0x0af0, 0x7706)},
 468         {USB_DEVICE(0x0af0, 0x7801)},
 469         {USB_DEVICE(0x0af0, 0x7901)},
 470         {USB_DEVICE(0x0af0, 0x7A01)},
 471         {USB_DEVICE(0x0af0, 0x7A05)},
 472         {USB_DEVICE(0x0af0, 0x8200)},
 473         {USB_DEVICE(0x0af0, 0x8201)},
 474         {USB_DEVICE(0x0af0, 0x8300)},
 475         {USB_DEVICE(0x0af0, 0x8302)},
 476         {USB_DEVICE(0x0af0, 0x8304)},
 477         {USB_DEVICE(0x0af0, 0x8400)},
 478         {USB_DEVICE(0x0af0, 0x8600)},
 479         {USB_DEVICE(0x0af0, 0x8800)},
 480         {USB_DEVICE(0x0af0, 0x8900)},
 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 void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 847 {
 848         struct hso_net *odev = netdev_priv(net);
 849
 850         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 851         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 852         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 853 }
 854
 855 static const struct ethtool_ops ops = {
 856         .get_drvinfo = hso_get_drvinfo,
 857         .get_link = ethtool_op_get_link
 858 };
 859
 860 /* called when a packet did not ack after watchdogtimeout */
 861 static void hso_net_tx_timeout(struct net_device *net)
 862 {
 863         struct hso_net *odev = netdev_priv(net);
 864
 865         if (!odev)
 866                 return;
 867
 868         /* Tell syslog we are hosed. */
 869         dev_warn(&net->dev, "Tx timed out.\n");
 870
 871         /* Tear the waiting frame off the list */
 872         if (odev->mux_bulk_tx_urb &&
 873             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 874                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 875
 876         /* Update statistics */
 877         net->stats.tx_errors++;
 878 }
 879
 880 /* make a real packet from the received USB buffer */
 881 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 882                         unsigned int count, unsigned char is_eop)
 883 {
 884         unsigned short temp_bytes;
 885         unsigned short buffer_offset = 0;
 886         unsigned short frame_len;
 887         unsigned char *tmp_rx_buf;
 888
 889         /* log if needed */
 890         D1("Rx %d bytes", count);
 891         DUMP(ip_pkt, min(128, (int)count));
 892
 893         while (count) {
 894                 switch (odev->rx_parse_state) {
 895                 case WAIT_IP:
 896                         /* waiting for IP header. */
 897                         /* wanted bytes - size of ip header */
 898                         temp_bytes =
 899                             (count <
 900                              odev->rx_buf_missing) ? count : odev->
 901                             rx_buf_missing;
 902
 903                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 904                                odev->rx_buf_size, ip_pkt + buffer_offset,
 905                                temp_bytes);
 906
 907                         odev->rx_buf_size += temp_bytes;
 908                         buffer_offset += temp_bytes;
 909                         odev->rx_buf_missing -= temp_bytes;
 910                         count -= temp_bytes;
 911
 912                         if (!odev->rx_buf_missing) {
 913                                 /* header is complete allocate an sk_buffer and
 914                                  * continue to WAIT_DATA */
 915                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 916
 917                                 if ((frame_len > DEFAULT_MRU) ||
 918                                     (frame_len < sizeof(struct iphdr))) {
 919                                         dev_err(&odev->net->dev,
 920                                                 "Invalid frame (%d) length\n",
 921                                                 frame_len);
 922                                         odev->rx_parse_state = WAIT_SYNC;
 923                                         continue;
 924                                 }
 925                                 /* Allocate an sk_buff */
 926                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 927                                                                     frame_len);
 928                                 if (!odev->skb_rx_buf) {
 929                                         /* We got no receive buffer. */
 930                                         D1("could not allocate memory");
 931                                         odev->rx_parse_state = WAIT_SYNC;
 932                                         return;
 933                                 }
 934
 935                                 /* Copy what we got so far. make room for iphdr
 936                                  * after tail. */
 937                                 tmp_rx_buf =
 938                                     skb_put(odev->skb_rx_buf,
 939                                             sizeof(struct iphdr));
 940                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 941                                        sizeof(struct iphdr));
 942
 943                                 /* ETH_HLEN */
 944                                 odev->rx_buf_size = sizeof(struct iphdr);
 945
 946                                 /* Filip actually use .tot_len */
 947                                 odev->rx_buf_missing =
 948                                     frame_len - sizeof(struct iphdr);
 949                                 odev->rx_parse_state = WAIT_DATA;
 950                         }
 951                         break;
 952
 953                 case WAIT_DATA:
 954                         temp_bytes = (count < odev->rx_buf_missing)
 955                                         ? count : odev->rx_buf_missing;
 956
 957                         /* Copy the rest of the bytes that are left in the
 958                          * buffer into the waiting sk_buf. */
 959                         /* Make room for temp_bytes after tail. */
 960                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 961                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 962
 963                         odev->rx_buf_missing -= temp_bytes;
 964                         count -= temp_bytes;
 965                         buffer_offset += temp_bytes;
 966                         odev->rx_buf_size += temp_bytes;
 967                         if (!odev->rx_buf_missing) {
 968                                 /* Packet is complete. Inject into stack. */
 969                                 /* We have IP packet here */
 970                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 971                                 /* don't check it */
 972                                 odev->skb_rx_buf->ip_summed =
 973                                         CHECKSUM_UNNECESSARY;
 974
 975                                 skb_reset_mac_header(odev->skb_rx_buf);
 976
 977                                 /* Ship it off to the kernel */
 978                                 netif_rx(odev->skb_rx_buf);
 979                                 /* No longer our buffer. */
 980                                 odev->skb_rx_buf = NULL;
 981
 982                                 /* update out statistics */
 983                                 odev->net->stats.rx_packets++;
 984
 985                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 986
 987                                 odev->rx_buf_size = 0;
 988                                 odev->rx_buf_missing = sizeof(struct iphdr);
 989                                 odev->rx_parse_state = WAIT_IP;
 990                         }
 991                         break;
 992
 993                 case WAIT_SYNC:
 994                         D1(" W_S");
 995                         count = 0;
 996                         break;
 997                 default:
 998                         D1(" ");
 999                         count--;
1000                         break;
1001                 }
1002         }
1003
1004         /* Recovery mechanism for WAIT_SYNC state. */
1005         if (is_eop) {
1006                 if (odev->rx_parse_state == WAIT_SYNC) {
1007                         odev->rx_parse_state = WAIT_IP;
1008                         odev->rx_buf_size = 0;
1009                         odev->rx_buf_missing = sizeof(struct iphdr);
1010                 }
1011         }
1012 }
1013
1014 /* Moving data from usb to kernel (in interrupt state) */
1015 static void read_bulk_callback(struct urb *urb)
1016 {
1017         struct hso_net *odev = urb->context;
1018         struct net_device *net;
1019         int result;
1020         int status = urb->status;
1021
1022         /* is al ok?  (Filip: Who's Al ?) */
1023         if (status) {
1024                 handle_usb_error(status, __func__, odev->parent);
1025                 return;
1026         }
1027
1028         /* Sanity check */
1029         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1030                 D1("BULK IN callback but driver is not active!");
1031                 return;
1032         }
1033         usb_mark_last_busy(urb->dev);
1034
1035         net = odev->net;
1036
1037         if (!netif_device_present(net)) {
1038                 /* Somebody killed our network interface... */
1039                 return;
1040         }
1041
1042         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1043                 u32 rest;
1044                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1045                 rest = urb->actual_length %
1046                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1047                 if (((rest == 5) || (rest == 6)) &&
1048                     !memcmp(((u8 *) urb->transfer_buffer) +
1049                             urb->actual_length - 4, crc_check, 4)) {
1050                         urb->actual_length -= 4;
1051                 }
1052         }
1053
1054         /* do we even have a packet? */
1055         if (urb->actual_length) {
1056                 /* Handle the IP stream, add header and push it onto network
1057                  * stack if the packet is complete. */
1058                 spin_lock(&odev->net_lock);
1059                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1060                             (urb->transfer_buffer_length >
1061                              urb->actual_length) ? 1 : 0);
1062                 spin_unlock(&odev->net_lock);
1063         }
1064
1065         /* We are done with this URB, resubmit it. Prep the USB to wait for
1066          * another frame. Reuse same as received. */
1067         usb_fill_bulk_urb(urb,
1068                           odev->parent->usb,
1069                           usb_rcvbulkpipe(odev->parent->usb,
1070                                           odev->in_endp->
1071                                           bEndpointAddress & 0x7F),
1072                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1073                           read_bulk_callback, odev);
1074
1075         /* Give this to the USB subsystem so it can tell us when more data
1076          * arrives. */
1077         result = usb_submit_urb(urb, GFP_ATOMIC);
1078         if (result)
1079                 dev_warn(&odev->parent->interface->dev,
1080                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1081                          result);
1082 }
1083
1084 /* Serial driver functions */
1085
1086 static void hso_init_termios(struct ktermios *termios)
1087 {
1088         /*
1089          * The default requirements for this device are:
1090          */
1091         termios->c_iflag &=
1092                 ~(IGNBRK        /* disable ignore break */
1093                 | BRKINT        /* disable break causes interrupt */
1094                 | PARMRK        /* disable mark parity errors */
1095                 | ISTRIP        /* disable clear high bit of input characters */
1096                 | INLCR         /* disable translate NL to CR */
1097                 | IGNCR         /* disable ignore CR */
1098                 | ICRNL         /* disable translate CR to NL */
1099                 | IXON);        /* disable enable XON/XOFF flow control */
1100
1101         /* disable postprocess output characters */
1102         termios->c_oflag &= ~OPOST;
1103
1104         termios->c_lflag &=
1105                 ~(ECHO          /* disable echo input characters */
1106                 | ECHONL        /* disable echo new line */
1107                 | ICANON        /* disable erase, kill, werase, and rprnt
1108                                    special characters */
1109                 | ISIG          /* disable interrupt, quit, and suspend special
1110                                    characters */
1111                 | IEXTEN);      /* disable non-POSIX special characters */
1112
1113         termios->c_cflag &=
1114                 ~(CSIZE         /* no size */
1115                 | PARENB        /* disable parity bit */
1116                 | CBAUD         /* clear current baud rate */
1117                 | CBAUDEX);     /* clear current buad rate */
1118
1119         termios->c_cflag |= CS8;        /* character size 8 bits */
1120
1121         /* baud rate 115200 */
1122         tty_termios_encode_baud_rate(termios, 115200, 115200);
1123 }
1124
1125 static void _hso_serial_set_termios(struct tty_struct *tty,
1126                                     struct ktermios *old)
1127 {
1128         struct hso_serial *serial = get_serial_by_tty(tty);
1129         struct ktermios *termios;
1130
1131         if (!serial) {
1132                 printk(KERN_ERR "%s: no tty structures", __func__);
1133                 return;
1134         }
1135
1136         D4("port %d", serial->minor);
1137
1138         /*
1139          *      Fix up unsupported bits
1140          */
1141         termios = tty->termios;
1142         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1143
1144         termios->c_cflag &=
1145                 ~(CSIZE         /* no size */
1146                 | PARENB        /* disable parity bit */
1147                 | CBAUD         /* clear current baud rate */
1148                 | CBAUDEX);     /* clear current buad rate */
1149
1150         termios->c_cflag |= CS8;        /* character size 8 bits */
1151
1152         /* baud rate 115200 */
1153         tty_encode_baud_rate(tty, 115200, 115200);
1154 }
1155
1156 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1157 {
1158         int result;
1159         /* We are done with this URB, resubmit it. Prep the USB to wait for
1160          * another frame */
1161         usb_fill_bulk_urb(urb, serial->parent->usb,
1162                           usb_rcvbulkpipe(serial->parent->usb,
1163                                           serial->in_endp->
1164                                           bEndpointAddress & 0x7F),
1165                           urb->transfer_buffer, serial->rx_data_length,
1166                           hso_std_serial_read_bulk_callback, serial);
1167         /* Give this to the USB subsystem so it can tell us when more data
1168          * arrives. */
1169         result = usb_submit_urb(urb, GFP_ATOMIC);
1170         if (result) {
1171                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1172                         __func__, result);
1173         }
1174 }
1175
1176
1177
1178
1179 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1180 {
1181         int count;
1182         struct urb *curr_urb;
1183
1184         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1185                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1186                 count = put_rxbuf_data(curr_urb, serial);
1187                 if (count == -1)
1188                         return;
1189                 if (count == 0) {
1190                         serial->curr_rx_urb_idx++;
1191                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1192                                 serial->curr_rx_urb_idx = 0;
1193                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1194                 }
1195         }
1196 }
1197
1198 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1199 {
1200         int count = 0;
1201         struct urb *urb;
1202
1203         urb = serial->rx_urb[0];
1204         if (serial->open_count > 0) {
1205                 count = put_rxbuf_data(urb, serial);
1206                 if (count == -1)
1207                         return;
1208         }
1209         /* Re issue a read as long as we receive data. */
1210
1211         if (count == 0 && ((urb->actual_length != 0) ||
1212                            (serial->rx_state == RX_PENDING))) {
1213                 serial->rx_state = RX_SENT;
1214                 hso_mux_serial_read(serial);
1215         } else
1216                 serial->rx_state = RX_IDLE;
1217 }
1218
1219
1220 /* read callback for Diag and CS port */
1221 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1222 {
1223         struct hso_serial *serial = urb->context;
1224         int status = urb->status;
1225
1226         /* sanity check */
1227         if (!serial) {
1228                 D1("serial == NULL");
1229                 return;
1230         } else if (status) {
1231                 handle_usb_error(status, __func__, serial->parent);
1232                 return;
1233         }
1234
1235         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1236         D1("Actual length = %d\n", urb->actual_length);
1237         DUMP1(urb->transfer_buffer, urb->actual_length);
1238
1239         /* Anyone listening? */
1240         if (serial->open_count == 0)
1241                 return;
1242
1243         if (status == 0) {
1244                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1245                         u32 rest;
1246                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1247                         rest =
1248                             urb->actual_length %
1249                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1250                         if (((rest == 5) || (rest == 6)) &&
1251                             !memcmp(((u8 *) urb->transfer_buffer) +
1252                                     urb->actual_length - 4, crc_check, 4)) {
1253                                 urb->actual_length -= 4;
1254                         }
1255                 }
1256                 /* Valid data, handle RX data */
1257                 spin_lock(&serial->serial_lock);
1258                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1259                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1260                 spin_unlock(&serial->serial_lock);
1261         } else if (status == -ENOENT || status == -ECONNRESET) {
1262                 /* Unlinked - check for throttled port. */
1263                 D2("Port %d, successfully unlinked urb", serial->minor);
1264                 spin_lock(&serial->serial_lock);
1265                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1266                 hso_resubmit_rx_bulk_urb(serial, urb);
1267                 spin_unlock(&serial->serial_lock);
1268         } else {
1269                 D2("Port %d, status = %d for read urb", serial->minor, status);
1270                 return;
1271         }
1272 }
1273
1274 /*
1275  * This needs to be a tasklet otherwise we will
1276  * end up recursively calling this function.
1277  */
1278 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1279 {
1280         unsigned long flags;
1281
1282         spin_lock_irqsave(&serial->serial_lock, flags);
1283         if ((serial->parent->port_spec & HSO_INTF_MUX))
1284                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1285         else
1286                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1287         spin_unlock_irqrestore(&serial->serial_lock, flags);
1288 }
1289
1290 static  void hso_unthrottle(struct tty_struct *tty)
1291 {
1292         struct hso_serial *serial = get_serial_by_tty(tty);
1293
1294         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1295 }
1296
1297 static void hso_unthrottle_workfunc(struct work_struct *work)
1298 {
1299         struct hso_serial *serial =
1300             container_of(work, struct hso_serial,
1301                          retry_unthrottle_workqueue);
1302         hso_unthrottle_tasklet(serial);
1303 }
1304
1305 /* open the requested serial port */
1306 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1307 {
1308         struct hso_serial *serial = get_serial_by_index(tty->index);
1309         int result;
1310
1311         /* sanity check */
1312         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1313                 WARN_ON(1);
1314                 tty->driver_data = NULL;
1315                 D1("Failed to open port");
1316                 return -ENODEV;
1317         }
1318
1319         mutex_lock(&serial->parent->mutex);
1320         result = usb_autopm_get_interface(serial->parent->interface);
1321         if (result < 0)
1322                 goto err_out;
1323
1324         D1("Opening %d", serial->minor);
1325         kref_get(&serial->parent->ref);
1326
1327         /* setup */
1328         spin_lock_irq(&serial->serial_lock);
1329         tty->driver_data = serial;
1330         tty_kref_put(serial->tty);
1331         serial->tty = tty_kref_get(tty);
1332         spin_unlock_irq(&serial->serial_lock);
1333
1334         /* check for port already opened, if not set the termios */
1335         serial->open_count++;
1336         if (serial->open_count == 1) {
1337                 tty->low_latency = 1;
1338                 serial->rx_state = RX_IDLE;
1339                 /* Force default termio settings */
1340                 _hso_serial_set_termios(tty, NULL);
1341                 tasklet_init(&serial->unthrottle_tasklet,
1342                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1343                              (unsigned long)serial);
1344                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1345                           hso_unthrottle_workfunc);
1346                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1347                 if (result) {
1348                         hso_stop_serial_device(serial->parent);
1349                         serial->open_count--;
1350                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1351                 }
1352         } else {
1353                 D1("Port was already open");
1354         }
1355
1356         usb_autopm_put_interface(serial->parent->interface);
1357
1358         /* done */
1359         if (result)
1360                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1361 err_out:
1362         mutex_unlock(&serial->parent->mutex);
1363         return result;
1364 }
1365
1366 /* close the requested serial port */
1367 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1368 {
1369         struct hso_serial *serial = tty->driver_data;
1370         u8 usb_gone;
1371
1372         D1("Closing serial port");
1373
1374         /* Open failed, no close cleanup required */
1375         if (serial == NULL)
1376                 return;
1377
1378         mutex_lock(&serial->parent->mutex);
1379         usb_gone = serial->parent->usb_gone;
1380
1381         if (!usb_gone)
1382                 usb_autopm_get_interface(serial->parent->interface);
1383
1384         /* reset the rts and dtr */
1385         /* do the actual close */
1386         serial->open_count--;
1387
1388         if (serial->open_count <= 0) {
1389                 serial->open_count = 0;
1390                 spin_lock_irq(&serial->serial_lock);
1391                 if (serial->tty == tty) {
1392                         serial->tty->driver_data = NULL;
1393                         serial->tty = NULL;
1394                         tty_kref_put(tty);
1395                 }
1396                 spin_unlock_irq(&serial->serial_lock);
1397                 if (!usb_gone)
1398                         hso_stop_serial_device(serial->parent);
1399                 tasklet_kill(&serial->unthrottle_tasklet);
1400                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1401         }
1402
1403         if (!usb_gone)
1404                 usb_autopm_put_interface(serial->parent->interface);
1405
1406         mutex_unlock(&serial->parent->mutex);
1407
1408         kref_put(&serial->parent->ref, hso_serial_ref_free);
1409 }
1410
1411 /* close the requested serial port */
1412 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1413                             int count)
1414 {
1415         struct hso_serial *serial = get_serial_by_tty(tty);
1416         int space, tx_bytes;
1417         unsigned long flags;
1418
1419         /* sanity check */
1420         if (serial == NULL) {
1421                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1422                 return -ENODEV;
1423         }
1424
1425         spin_lock_irqsave(&serial->serial_lock, flags);
1426
1427         space = serial->tx_data_length - serial->tx_buffer_count;
1428         tx_bytes = (count < space) ? count : space;
1429
1430         if (!tx_bytes)
1431                 goto out;
1432
1433         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1434         serial->tx_buffer_count += tx_bytes;
1435
1436 out:
1437         spin_unlock_irqrestore(&serial->serial_lock, flags);
1438
1439         hso_kick_transmit(serial);
1440         /* done */
1441         return tx_bytes;
1442 }
1443
1444 /* how much room is there for writing */
1445 static int hso_serial_write_room(struct tty_struct *tty)
1446 {
1447         struct hso_serial *serial = get_serial_by_tty(tty);
1448         int room;
1449         unsigned long flags;
1450
1451         spin_lock_irqsave(&serial->serial_lock, flags);
1452         room = serial->tx_data_length - serial->tx_buffer_count;
1453         spin_unlock_irqrestore(&serial->serial_lock, flags);
1454
1455         /* return free room */
1456         return room;
1457 }
1458
1459 /* setup the term */
1460 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1461 {
1462         struct hso_serial *serial = get_serial_by_tty(tty);
1463         unsigned long flags;
1464
1465         if (old)
1466                 D5("Termios called with: cflags new[%d] - old[%d]",
1467                    tty->termios->c_cflag, old->c_cflag);
1468
1469         /* the actual setup */
1470         spin_lock_irqsave(&serial->serial_lock, flags);
1471         if (serial->open_count)
1472                 _hso_serial_set_termios(tty, old);
1473         else
1474                 tty->termios = old;
1475         spin_unlock_irqrestore(&serial->serial_lock, flags);
1476
1477         /* done */
1478 }
1479
1480 /* how many characters in the buffer */
1481 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1482 {
1483         struct hso_serial *serial = get_serial_by_tty(tty);
1484         int chars;
1485         unsigned long flags;
1486
1487         /* sanity check */
1488         if (serial == NULL)
1489                 return 0;
1490
1491         spin_lock_irqsave(&serial->serial_lock, flags);
1492         chars = serial->tx_buffer_count;
1493         spin_unlock_irqrestore(&serial->serial_lock, flags);
1494
1495         return chars;
1496 }
1497 static int tiocmget_submit_urb(struct hso_serial *serial,
1498                                struct hso_tiocmget *tiocmget,
1499                                struct usb_device *usb)
1500 {
1501         int result;
1502
1503         if (serial->parent->usb_gone)
1504                 return -ENODEV;
1505         usb_fill_int_urb(tiocmget->urb, usb,
1506                          usb_rcvintpipe(usb,
1507                                         tiocmget->endp->
1508                                         bEndpointAddress & 0x7F),
1509                          &tiocmget->serial_state_notification,
1510                          sizeof(struct hso_serial_state_notification),
1511                          tiocmget_intr_callback, serial,
1512                          tiocmget->endp->bInterval);
1513         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1514         if (result) {
1515                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1516                          result);
1517         }
1518         return result;
1519
1520 }
1521
1522 static void tiocmget_intr_callback(struct urb *urb)
1523 {
1524         struct hso_serial *serial = urb->context;
1525         struct hso_tiocmget *tiocmget;
1526         int status = urb->status;
1527         u16 UART_state_bitmap, prev_UART_state_bitmap;
1528         struct uart_icount *icount;
1529         struct hso_serial_state_notification *serial_state_notification;
1530         struct usb_device *usb;
1531
1532         /* Sanity checks */
1533         if (!serial)
1534                 return;
1535         if (status) {
1536                 handle_usb_error(status, __func__, serial->parent);
1537                 return;
1538         }
1539         tiocmget = serial->tiocmget;
1540         if (!tiocmget)
1541                 return;
1542         usb = serial->parent->usb;
1543         serial_state_notification = &tiocmget->serial_state_notification;
1544         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1545             serial_state_notification->bNotification != B_NOTIFICATION ||
1546             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1547             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1548             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1549                 dev_warn(&usb->dev,
1550                          "hso received invalid serial state notification\n");
1551                 DUMP(serial_state_notification,
1552                      sizeof(struct hso_serial_state_notification));
1553         } else {
1554
1555                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1556                                                 UART_state_bitmap);
1557                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1558                 icount = &tiocmget->icount;
1559                 spin_lock(&serial->serial_lock);
1560                 if ((UART_state_bitmap & B_OVERRUN) !=
1561                    (prev_UART_state_bitmap & B_OVERRUN))
1562                         icount->parity++;
1563                 if ((UART_state_bitmap & B_PARITY) !=
1564                    (prev_UART_state_bitmap & B_PARITY))
1565                         icount->parity++;
1566                 if ((UART_state_bitmap & B_FRAMING) !=
1567                    (prev_UART_state_bitmap & B_FRAMING))
1568                         icount->frame++;
1569                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1570                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1571                         icount->rng++;
1572                 if ((UART_state_bitmap & B_BREAK) !=
1573                    (prev_UART_state_bitmap & B_BREAK))
1574                         icount->brk++;
1575                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1576                    (prev_UART_state_bitmap & B_TX_CARRIER))
1577                         icount->dsr++;
1578                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1579                    (prev_UART_state_bitmap & B_RX_CARRIER))
1580                         icount->dcd++;
1581                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1582                 spin_unlock(&serial->serial_lock);
1583                 tiocmget->intr_completed = 1;
1584                 wake_up_interruptible(&tiocmget->waitq);
1585         }
1586         memset(serial_state_notification, 0,
1587                sizeof(struct hso_serial_state_notification));
1588         tiocmget_submit_urb(serial,
1589                             tiocmget,
1590                             serial->parent->usb);
1591 }
1592
1593 /*
1594  * next few functions largely stolen from drivers/serial/serial_core.c
1595  */
1596 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1597  * - mask passed in arg for lines of interest
1598  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1599  * Caller should use TIOCGICOUNT to see which one it was
1600  */
1601 static int
1602 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1603 {
1604         DECLARE_WAITQUEUE(wait, current);
1605         struct uart_icount cprev, cnow;
1606         struct hso_tiocmget  *tiocmget;
1607         int ret;
1608
1609         tiocmget = serial->tiocmget;
1610         if (!tiocmget)
1611                 return -ENOENT;
1612         /*
1613          * note the counters on entry
1614          */
1615         spin_lock_irq(&serial->serial_lock);
1616         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1617         spin_unlock_irq(&serial->serial_lock);
1618         add_wait_queue(&tiocmget->waitq, &wait);
1619         for (;;) {
1620                 spin_lock_irq(&serial->serial_lock);
1621                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622                 spin_unlock_irq(&serial->serial_lock);
1623                 set_current_state(TASK_INTERRUPTIBLE);
1624                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1625                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1626                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1627                         ret = 0;
1628                         break;
1629                 }
1630                 schedule();
1631                 /* see if a signal did it */
1632                 if (signal_pending(current)) {
1633                         ret = -ERESTARTSYS;
1634                         break;
1635                 }
1636                 cprev = cnow;
1637         }
1638         current->state = TASK_RUNNING;
1639         remove_wait_queue(&tiocmget->waitq, &wait);
1640
1641         return ret;
1642 }
1643
1644 /*
1645  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1646  * Return: write counters to the user passed counter struct
1647  * NB: both 1->0 and 0->1 transitions are counted except for
1648  *     RI where only 0->1 is counted.
1649  */
1650 static int hso_get_count(struct hso_serial *serial,
1651                           struct serial_icounter_struct __user *icnt)
1652 {
1653         struct serial_icounter_struct icount;
1654         struct uart_icount cnow;
1655         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1656
1657         if (!tiocmget)
1658                  return -ENOENT;
1659         spin_lock_irq(&serial->serial_lock);
1660         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1661         spin_unlock_irq(&serial->serial_lock);
1662
1663         icount.cts         = cnow.cts;
1664         icount.dsr         = cnow.dsr;
1665         icount.rng         = cnow.rng;
1666         icount.dcd         = cnow.dcd;
1667         icount.rx          = cnow.rx;
1668         icount.tx          = cnow.tx;
1669         icount.frame       = cnow.frame;
1670         icount.overrun     = cnow.overrun;
1671         icount.parity      = cnow.parity;
1672         icount.brk         = cnow.brk;
1673         icount.buf_overrun = cnow.buf_overrun;
1674
1675         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1676 }
1677
1678
1679 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1680 {
1681         int retval;
1682         struct hso_serial *serial = get_serial_by_tty(tty);
1683         struct hso_tiocmget  *tiocmget;
1684         u16 UART_state_bitmap;
1685
1686         /* sanity check */
1687         if (!serial) {
1688                 D1("no tty structures");
1689                 return -EINVAL;
1690         }
1691         spin_lock_irq(&serial->serial_lock);
1692         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1693             ((serial->dtr_state) ? TIOCM_DTR : 0);
1694         tiocmget = serial->tiocmget;
1695         if (tiocmget) {
1696
1697                 UART_state_bitmap = le16_to_cpu(
1698                         tiocmget->prev_UART_state_bitmap);
1699                 if (UART_state_bitmap & B_RING_SIGNAL)
1700                         retval |=  TIOCM_RNG;
1701                 if (UART_state_bitmap & B_RX_CARRIER)
1702                         retval |=  TIOCM_CD;
1703                 if (UART_state_bitmap & B_TX_CARRIER)
1704                         retval |=  TIOCM_DSR;
1705         }
1706         spin_unlock_irq(&serial->serial_lock);
1707         return retval;
1708 }
1709
1710 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1711                                unsigned int set, unsigned int clear)
1712 {
1713         int val = 0;
1714         unsigned long flags;
1715         int if_num;
1716         struct hso_serial *serial = get_serial_by_tty(tty);
1717
1718         /* sanity check */
1719         if (!serial) {
1720                 D1("no tty structures");
1721                 return -EINVAL;
1722         }
1723
1724         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1725                 return -EINVAL;
1726
1727         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1728
1729         spin_lock_irqsave(&serial->serial_lock, flags);
1730         if (set & TIOCM_RTS)
1731                 serial->rts_state = 1;
1732         if (set & TIOCM_DTR)
1733                 serial->dtr_state = 1;
1734
1735         if (clear & TIOCM_RTS)
1736                 serial->rts_state = 0;
1737         if (clear & TIOCM_DTR)
1738                 serial->dtr_state = 0;
1739
1740         if (serial->dtr_state)
1741                 val |= 0x01;
1742         if (serial->rts_state)
1743                 val |= 0x02;
1744
1745         spin_unlock_irqrestore(&serial->serial_lock, flags);
1746
1747         return usb_control_msg(serial->parent->usb,
1748                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1749                                0x21, val, if_num, NULL, 0,
1750                                USB_CTRL_SET_TIMEOUT);
1751 }
1752
1753 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1754                             unsigned int cmd, unsigned long arg)
1755 {
1756         struct hso_serial *serial =  get_serial_by_tty(tty);
1757         void __user *uarg = (void __user *)arg;
1758         int ret = 0;
1759         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1760
1761         if (!serial)
1762                 return -ENODEV;
1763         switch (cmd) {
1764         case TIOCMIWAIT:
1765                 ret = hso_wait_modem_status(serial, arg);
1766                 break;
1767
1768         case TIOCGICOUNT:
1769                 ret = hso_get_count(serial, uarg);
1770                 break;
1771         default:
1772                 ret = -ENOIOCTLCMD;
1773                 break;
1774         }
1775         return ret;
1776 }
1777
1778
1779 /* starts a transmit */
1780 static void hso_kick_transmit(struct hso_serial *serial)
1781 {
1782         u8 *temp;
1783         unsigned long flags;
1784         int res;
1785
1786         spin_lock_irqsave(&serial->serial_lock, flags);
1787         if (!serial->tx_buffer_count)
1788                 goto out;
1789
1790         if (serial->tx_urb_used)
1791                 goto out;
1792
1793         /* Wakeup USB interface if necessary */
1794         if (hso_get_activity(serial->parent) == -EAGAIN)
1795                 goto out;
1796
1797         /* Switch pointers around to avoid memcpy */
1798         temp = serial->tx_buffer;
1799         serial->tx_buffer = serial->tx_data;
1800         serial->tx_data = temp;
1801         serial->tx_data_count = serial->tx_buffer_count;
1802         serial->tx_buffer_count = 0;
1803
1804         /* If temp is set, it means we switched buffers */
1805         if (temp && serial->write_data) {
1806                 res = serial->write_data(serial);
1807                 if (res >= 0)
1808                         serial->tx_urb_used = 1;
1809         }
1810 out:
1811         spin_unlock_irqrestore(&serial->serial_lock, flags);
1812 }
1813
1814 /* make a request (for reading and writing data to muxed serial port) */
1815 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1816                               struct urb *ctrl_urb,
1817                               struct usb_ctrlrequest *ctrl_req,
1818                               u8 *ctrl_urb_data, u32 size)
1819 {
1820         int result;
1821         int pipe;
1822
1823         /* Sanity check */
1824         if (!serial || !ctrl_urb || !ctrl_req) {
1825                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1826                 return -EINVAL;
1827         }
1828
1829         /* initialize */
1830         ctrl_req->wValue = 0;
1831         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1832         ctrl_req->wLength = cpu_to_le16(size);
1833
1834         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1835                 /* Reading command */
1836                 ctrl_req->bRequestType = USB_DIR_IN |
1837                                          USB_TYPE_OPTION_VENDOR |
1838                                          USB_RECIP_INTERFACE;
1839                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1840                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1841         } else {
1842                 /* Writing command */
1843                 ctrl_req->bRequestType = USB_DIR_OUT |
1844                                          USB_TYPE_OPTION_VENDOR |
1845                                          USB_RECIP_INTERFACE;
1846                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1847                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1848         }
1849         /* syslog */
1850         D2("%s command (%02x) len: %d, port: %d",
1851            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1852            ctrl_req->bRequestType, ctrl_req->wLength, port);
1853
1854         /* Load ctrl urb */
1855         ctrl_urb->transfer_flags = 0;
1856         usb_fill_control_urb(ctrl_urb,
1857                              serial->parent->usb,
1858                              pipe,
1859                              (u8 *) ctrl_req,
1860                              ctrl_urb_data, size, ctrl_callback, serial);
1861         /* Send it on merry way */
1862         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1863         if (result) {
1864                 dev_err(&ctrl_urb->dev->dev,
1865                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1866                         result, type);
1867                 return result;
1868         }
1869
1870         /* done */
1871         return size;
1872 }
1873
1874 /* called by intr_callback when read occurs */
1875 static int hso_mux_serial_read(struct hso_serial *serial)
1876 {
1877         if (!serial)
1878                 return -EINVAL;
1879
1880         /* clean data */
1881         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1882         /* make the request */
1883
1884         if (serial->num_rx_urbs != 1) {
1885                 dev_err(&serial->parent->interface->dev,
1886                         "ERROR: mux'd reads with multiple buffers "
1887                         "not possible\n");
1888                 return 0;
1889         }
1890         return mux_device_request(serial,
1891                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1892                                   serial->parent->port_spec & HSO_PORT_MASK,
1893                                   serial->rx_urb[0],
1894                                   &serial->ctrl_req_rx,
1895                                   serial->rx_data[0], serial->rx_data_length);
1896 }
1897
1898 /* used for muxed serial port callback (muxed serial read) */
1899 static void intr_callback(struct urb *urb)
1900 {
1901         struct hso_shared_int *shared_int = urb->context;
1902         struct hso_serial *serial;
1903         unsigned char *port_req;
1904         int status = urb->status;
1905         int i;
1906
1907         usb_mark_last_busy(urb->dev);
1908
1909         /* sanity check */
1910         if (!shared_int)
1911                 return;
1912
1913         /* status check */
1914         if (status) {
1915                 handle_usb_error(status, __func__, NULL);
1916                 return;
1917         }
1918         D4("\n--- Got intr callback 0x%02X ---", status);
1919
1920         /* what request? */
1921         port_req = urb->transfer_buffer;
1922         D4(" port_req = 0x%.2X\n", *port_req);
1923         /* loop over all muxed ports to find the one sending this */
1924         for (i = 0; i < 8; i++) {
1925                 /* max 8 channels on MUX */
1926                 if (*port_req & (1 << i)) {
1927                         serial = get_serial_by_shared_int_and_type(shared_int,
1928                                                                    (1 << i));
1929                         if (serial != NULL) {
1930                                 D1("Pending read interrupt on port %d\n", i);
1931                                 spin_lock(&serial->serial_lock);
1932                                 if (serial->rx_state == RX_IDLE &&
1933                                         serial->open_count > 0) {
1934                                         /* Setup and send a ctrl req read on
1935                                          * port i */
1936                                         if (!serial->rx_urb_filled[0]) {
1937                                                 serial->rx_state = RX_SENT;
1938                                                 hso_mux_serial_read(serial);
1939                                         } else
1940                                                 serial->rx_state = RX_PENDING;
1941                                 } else {
1942                                         D1("Already a read pending on "
1943                                            "port %d or port not open\n", i);
1944                                 }
1945                                 spin_unlock(&serial->serial_lock);
1946                         }
1947                 }
1948         }
1949         /* Resubmit interrupt urb */
1950         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1951 }
1952
1953 /* called for writing to muxed serial port */
1954 static int hso_mux_serial_write_data(struct hso_serial *serial)
1955 {
1956         if (NULL == serial)
1957                 return -EINVAL;
1958
1959         return mux_device_request(serial,
1960                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1961                                   serial->parent->port_spec & HSO_PORT_MASK,
1962                                   serial->tx_urb,
1963                                   &serial->ctrl_req_tx,
1964                                   serial->tx_data, serial->tx_data_count);
1965 }
1966
1967 /* write callback for Diag and CS port */
1968 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1969 {
1970         struct hso_serial *serial = urb->context;
1971         int status = urb->status;
1972         struct tty_struct *tty;
1973
1974         /* sanity check */
1975         if (!serial) {
1976                 D1("serial == NULL");
1977                 return;
1978         }
1979
1980         spin_lock(&serial->serial_lock);
1981         serial->tx_urb_used = 0;
1982         tty = tty_kref_get(serial->tty);
1983         spin_unlock(&serial->serial_lock);
1984         if (status) {
1985                 handle_usb_error(status, __func__, serial->parent);
1986                 tty_kref_put(tty);
1987                 return;
1988         }
1989         hso_put_activity(serial->parent);
1990         if (tty) {
1991                 tty_wakeup(tty);
1992                 tty_kref_put(tty);
1993         }
1994         hso_kick_transmit(serial);
1995
1996         D1(" ");
1997 }
1998
1999 /* called for writing diag or CS serial port */
2000 static int hso_std_serial_write_data(struct hso_serial *serial)
2001 {
2002         int count = serial->tx_data_count;
2003         int result;
2004
2005         usb_fill_bulk_urb(serial->tx_urb,
2006                           serial->parent->usb,
2007                           usb_sndbulkpipe(serial->parent->usb,
2008                                           serial->out_endp->
2009                                           bEndpointAddress & 0x7F),
2010                           serial->tx_data, serial->tx_data_count,
2011                           hso_std_serial_write_bulk_callback, serial);
2012
2013         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2014         if (result) {
2015                 dev_warn(&serial->parent->usb->dev,
2016                          "Failed to submit urb - res %d\n", result);
2017                 return result;
2018         }
2019
2020         return count;
2021 }
2022
2023 /* callback after read or write on muxed serial port */
2024 static void ctrl_callback(struct urb *urb)
2025 {
2026         struct hso_serial *serial = urb->context;
2027         struct usb_ctrlrequest *req;
2028         int status = urb->status;
2029         struct tty_struct *tty;
2030
2031         /* sanity check */
2032         if (!serial)
2033                 return;
2034
2035         spin_lock(&serial->serial_lock);
2036         serial->tx_urb_used = 0;
2037         tty = tty_kref_get(serial->tty);
2038         spin_unlock(&serial->serial_lock);
2039         if (status) {
2040                 handle_usb_error(status, __func__, serial->parent);
2041                 tty_kref_put(tty);
2042                 return;
2043         }
2044
2045         /* what request? */
2046         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2047         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2048         D4("Actual length of urb = %d\n", urb->actual_length);
2049         DUMP1(urb->transfer_buffer, urb->actual_length);
2050
2051         if (req->bRequestType ==
2052             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2053                 /* response to a read command */
2054                 serial->rx_urb_filled[0] = 1;
2055                 spin_lock(&serial->serial_lock);
2056                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2057                 spin_unlock(&serial->serial_lock);
2058         } else {
2059                 hso_put_activity(serial->parent);
2060                 if (tty)
2061                         tty_wakeup(tty);
2062                 /* response to a write command */
2063                 hso_kick_transmit(serial);
2064         }
2065         tty_kref_put(tty);
2066 }
2067
2068 /* handle RX data for serial port */
2069 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2070 {
2071         struct tty_struct *tty;
2072         int write_length_remaining = 0;
2073         int curr_write_len;
2074
2075         /* Sanity check */
2076         if (urb == NULL || serial == NULL) {
2077                 D1("serial = NULL");
2078                 return -2;
2079         }
2080
2081         /* All callers to put_rxbuf_data hold serial_lock */
2082         tty = tty_kref_get(serial->tty);
2083
2084         /* Push data to tty */
2085         if (tty) {
2086                 write_length_remaining = urb->actual_length -
2087                         serial->curr_rx_urb_offset;
2088                 D1("data to push to tty");
2089                 while (write_length_remaining) {
2090                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2091                                 tty_kref_put(tty);
2092                                 return -1;
2093                         }
2094                         curr_write_len =  tty_insert_flip_string
2095                                 (tty, urb->transfer_buffer +
2096                                  serial->curr_rx_urb_offset,
2097                                  write_length_remaining);
2098                         serial->curr_rx_urb_offset += curr_write_len;
2099                         write_length_remaining -= curr_write_len;
2100                         tty_flip_buffer_push(tty);
2101                 }
2102         }
2103         if (write_length_remaining == 0) {
2104                 serial->curr_rx_urb_offset = 0;
2105                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2106         }
2107         tty_kref_put(tty);
2108         return write_length_remaining;
2109 }
2110
2111
2112 /* Base driver functions */
2113
2114 static void hso_log_port(struct hso_device *hso_dev)
2115 {
2116         char *port_type;
2117         char port_dev[20];
2118
2119         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2120         case HSO_PORT_CONTROL:
2121                 port_type = "Control";
2122                 break;
2123         case HSO_PORT_APP:
2124                 port_type = "Application";
2125                 break;
2126         case HSO_PORT_GPS:
2127                 port_type = "GPS";
2128                 break;
2129         case HSO_PORT_GPS_CONTROL:
2130                 port_type = "GPS control";
2131                 break;
2132         case HSO_PORT_APP2:
2133                 port_type = "Application2";
2134                 break;
2135         case HSO_PORT_PCSC:
2136                 port_type = "PCSC";
2137                 break;
2138         case HSO_PORT_DIAG:
2139                 port_type = "Diagnostic";
2140                 break;
2141         case HSO_PORT_DIAG2:
2142                 port_type = "Diagnostic2";
2143                 break;
2144         case HSO_PORT_MODEM:
2145                 port_type = "Modem";
2146                 break;
2147         case HSO_PORT_NETWORK:
2148                 port_type = "Network";
2149                 break;
2150         default:
2151                 port_type = "Unknown";
2152                 break;
2153         }
2154         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2155                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2156         } else
2157                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2158                         dev2ser(hso_dev)->minor);
2159
2160         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2161                 port_type, port_dev);
2162 }
2163
2164 static int hso_start_net_device(struct hso_device *hso_dev)
2165 {
2166         int i, result = 0;
2167         struct hso_net *hso_net = dev2net(hso_dev);
2168
2169         if (!hso_net)
2170                 return -ENODEV;
2171
2172         /* send URBs for all read buffers */
2173         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2174
2175                 /* Prep a receive URB */
2176                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2177                                   hso_dev->usb,
2178                                   usb_rcvbulkpipe(hso_dev->usb,
2179                                                   hso_net->in_endp->
2180                                                   bEndpointAddress & 0x7F),
2181                                   hso_net->mux_bulk_rx_buf_pool[i],
2182                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2183                                   hso_net);
2184
2185                 /* Put it out there so the device can send us stuff */
2186                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2187                                         GFP_NOIO);
2188                 if (result)
2189                         dev_warn(&hso_dev->usb->dev,
2190                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2191                                 i, result);
2192         }
2193
2194         return result;
2195 }
2196
2197 static int hso_stop_net_device(struct hso_device *hso_dev)
2198 {
2199         int i;
2200         struct hso_net *hso_net = dev2net(hso_dev);
2201
2202         if (!hso_net)
2203                 return -ENODEV;
2204
2205         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2206                 if (hso_net->mux_bulk_rx_urb_pool[i])
2207                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2208
2209         }
2210         if (hso_net->mux_bulk_tx_urb)
2211                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2212
2213         return 0;
2214 }
2215
2216 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2217 {
2218         int i, result = 0;
2219         struct hso_serial *serial = dev2ser(hso_dev);
2220
2221         if (!serial)
2222                 return -ENODEV;
2223
2224         /* If it is not the MUX port fill in and submit a bulk urb (already
2225          * allocated in hso_serial_start) */
2226         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2227                 for (i = 0; i < serial->num_rx_urbs; i++) {
2228                         usb_fill_bulk_urb(serial->rx_urb[i],
2229                                           serial->parent->usb,
2230                                           usb_rcvbulkpipe(serial->parent->usb,
2231                                                           serial->in_endp->
2232                                                           bEndpointAddress &
2233                                                           0x7F),
2234                                           serial->rx_data[i],
2235                                           serial->rx_data_length,
2236                                           hso_std_serial_read_bulk_callback,
2237                                           serial);
2238                         result = usb_submit_urb(serial->rx_urb[i], flags);
2239                         if (result) {
2240                                 dev_warn(&serial->parent->usb->dev,
2241                                          "Failed to submit urb - res %d\n",
2242                                          result);
2243                                 break;
2244                         }
2245                 }
2246         } else {
2247                 mutex_lock(&serial->shared_int->shared_int_lock);
2248                 if (!serial->shared_int->use_count) {
2249                         result =
2250                             hso_mux_submit_intr_urb(serial->shared_int,
2251                                                     hso_dev->usb, flags);
2252                 }
2253                 serial->shared_int->use_count++;
2254                 mutex_unlock(&serial->shared_int->shared_int_lock);
2255         }
2256         if (serial->tiocmget)
2257                 tiocmget_submit_urb(serial,
2258                                     serial->tiocmget,
2259                                     serial->parent->usb);
2260         return result;
2261 }
2262
2263 static int hso_stop_serial_device(struct hso_device *hso_dev)
2264 {
2265         int i;
2266         struct hso_serial *serial = dev2ser(hso_dev);
2267         struct hso_tiocmget  *tiocmget;
2268
2269         if (!serial)
2270                 return -ENODEV;
2271
2272         for (i = 0; i < serial->num_rx_urbs; i++) {
2273                 if (serial->rx_urb[i]) {
2274                                 usb_kill_urb(serial->rx_urb[i]);
2275                                 serial->rx_urb_filled[i] = 0;
2276                 }
2277         }
2278         serial->curr_rx_urb_idx = 0;
2279         serial->curr_rx_urb_offset = 0;
2280
2281         if (serial->tx_urb)
2282                 usb_kill_urb(serial->tx_urb);
2283
2284         if (serial->shared_int) {
2285                 mutex_lock(&serial->shared_int->shared_int_lock);
2286                 if (serial->shared_int->use_count &&
2287                     (--serial->shared_int->use_count == 0)) {
2288                         struct urb *urb;
2289
2290                         urb = serial->shared_int->shared_intr_urb;
2291                         if (urb)
2292                                 usb_kill_urb(urb);
2293                 }
2294                 mutex_unlock(&serial->shared_int->shared_int_lock);
2295         }
2296         tiocmget = serial->tiocmget;
2297         if (tiocmget) {
2298                 wake_up_interruptible(&tiocmget->waitq);
2299                 usb_kill_urb(tiocmget->urb);
2300         }
2301
2302         return 0;
2303 }
2304
2305 static void hso_serial_common_free(struct hso_serial *serial)
2306 {
2307         int i;
2308
2309         if (serial->parent->dev)
2310                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2311
2312         tty_unregister_device(tty_drv, serial->minor);
2313
2314         for (i = 0; i < serial->num_rx_urbs; i++) {
2315                 /* unlink and free RX URB */
2316                 usb_free_urb(serial->rx_urb[i]);
2317                 /* free the RX buffer */
2318                 kfree(serial->rx_data[i]);
2319         }
2320
2321         /* unlink and free TX URB */
2322         usb_free_urb(serial->tx_urb);
2323         kfree(serial->tx_data);
2324 }
2325
2326 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2327                                     int rx_size, int tx_size)
2328 {
2329         struct device *dev;
2330         int minor;
2331         int i;
2332
2333         minor = get_free_serial_index();
2334         if (minor < 0)
2335                 goto exit;
2336
2337         /* register our minor number */
2338         serial->parent->dev = tty_register_device(tty_drv, minor,
2339                                         &serial->parent->interface->dev);
2340         dev = serial->parent->dev;
2341         dev_set_drvdata(dev, serial->parent);
2342         i = device_create_file(dev, &dev_attr_hsotype);
2343
2344         /* fill in specific data for later use */
2345         serial->minor = minor;
2346         serial->magic = HSO_SERIAL_MAGIC;
2347         spin_lock_init(&serial->serial_lock);
2348         serial->num_rx_urbs = num_urbs;
2349
2350         /* RX, allocate urb and initialize */
2351
2352         /* prepare our RX buffer */
2353         serial->rx_data_length = rx_size;
2354         for (i = 0; i < serial->num_rx_urbs; i++) {
2355                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2356                 if (!serial->rx_urb[i]) {
2357                         dev_err(dev, "Could not allocate urb?\n");
2358                         goto exit;
2359                 }
2360                 serial->rx_urb[i]->transfer_buffer = NULL;
2361                 serial->rx_urb[i]->transfer_buffer_length = 0;
2362                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2363                                              GFP_KERNEL);
2364                 if (!serial->rx_data[i]) {
2365                         dev_err(dev, "%s - Out of memory\n", __func__);
2366                         goto exit;
2367                 }
2368         }
2369
2370         /* TX, allocate urb and initialize */
2371         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2372         if (!serial->tx_urb) {
2373                 dev_err(dev, "Could not allocate urb?\n");
2374                 goto exit;
2375         }
2376         serial->tx_urb->transfer_buffer = NULL;
2377         serial->tx_urb->transfer_buffer_length = 0;
2378         /* prepare our TX buffer */
2379         serial->tx_data_count = 0;
2380         serial->tx_buffer_count = 0;
2381         serial->tx_data_length = tx_size;
2382         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2383         if (!serial->tx_data) {
2384                 dev_err(dev, "%s - Out of memory\n", __func__);
2385                 goto exit;
2386         }
2387         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2388         if (!serial->tx_buffer) {
2389                 dev_err(dev, "%s - Out of memory\n", __func__);
2390                 goto exit;
2391         }
2392
2393         return 0;
2394 exit:
2395         hso_serial_common_free(serial);
2396         return -1;
2397 }
2398
2399 /* Creates a general hso device */
2400 static struct hso_device *hso_create_device(struct usb_interface *intf,
2401                                             int port_spec)
2402 {
2403         struct hso_device *hso_dev;
2404
2405         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2406         if (!hso_dev)
2407                 return NULL;
2408
2409         hso_dev->port_spec = port_spec;
2410         hso_dev->usb = interface_to_usbdev(intf);
2411         hso_dev->interface = intf;
2412         kref_init(&hso_dev->ref);
2413         mutex_init(&hso_dev->mutex);
2414
2415         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2416         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2417         INIT_WORK(&hso_dev->reset_device, reset_device);
2418
2419         return hso_dev;
2420 }
2421
2422 /* Removes a network device in the network device table */
2423 static int remove_net_device(struct hso_device *hso_dev)
2424 {
2425         int i;
2426
2427         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2428                 if (network_table[i] == hso_dev) {
2429                         network_table[i] = NULL;
2430                         break;
2431                 }
2432         }
2433         if (i == HSO_MAX_NET_DEVICES)
2434                 return -1;
2435         return 0;
2436 }
2437
2438 /* Frees our network device */
2439 static void hso_free_net_device(struct hso_device *hso_dev)
2440 {
2441         int i;
2442         struct hso_net *hso_net = dev2net(hso_dev);
2443
2444         if (!hso_net)
2445                 return;
2446
2447         remove_net_device(hso_net->parent);
2448
2449         if (hso_net->net) {
2450                 unregister_netdev(hso_net->net);
2451                 free_netdev(hso_net->net);
2452         }
2453
2454         /* start freeing */
2455         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2456                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2457                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2458                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2459         }
2460         usb_free_urb(hso_net->mux_bulk_tx_urb);
2461         kfree(hso_net->mux_bulk_tx_buf);
2462         hso_net->mux_bulk_tx_buf = NULL;
2463
2464         kfree(hso_dev);
2465 }
2466
2467 static const struct net_device_ops hso_netdev_ops = {
2468         .ndo_open       = hso_net_open,
2469         .ndo_stop       = hso_net_close,
2470         .ndo_start_xmit = hso_net_start_xmit,
2471         .ndo_tx_timeout = hso_net_tx_timeout,
2472 };
2473
2474 /* initialize the network interface */
2475 static void hso_net_init(struct net_device *net)
2476 {
2477         struct hso_net *hso_net = netdev_priv(net);
2478
2479         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2480
2481         /* fill in the other fields */
2482         net->netdev_ops = &hso_netdev_ops;
2483         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2484         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2485         net->type = ARPHRD_NONE;
2486         net->mtu = DEFAULT_MTU - 14;
2487         net->tx_queue_len = 10;
2488         SET_ETHTOOL_OPS(net, &ops);
2489
2490         /* and initialize the semaphore */
2491         spin_lock_init(&hso_net->net_lock);
2492 }
2493
2494 /* Adds a network device in the network device table */
2495 static int add_net_device(struct hso_device *hso_dev)
2496 {
2497         int i;
2498
2499         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2500                 if (network_table[i] == NULL) {
2501                         network_table[i] = hso_dev;
2502                         break;
2503                 }
2504         }
2505         if (i == HSO_MAX_NET_DEVICES)
2506                 return -1;
2507         return 0;
2508 }
2509
2510 static int hso_rfkill_set_block(void *data, bool blocked)
2511 {
2512         struct hso_device *hso_dev = data;
2513         int enabled = !blocked;
2514         int rv;
2515
2516         mutex_lock(&hso_dev->mutex);
2517         if (hso_dev->usb_gone)
2518                 rv = 0;
2519         else
2520                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2521                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2522                                        USB_CTRL_SET_TIMEOUT);
2523         mutex_unlock(&hso_dev->mutex);
2524         return rv;
2525 }
2526
2527 static const struct rfkill_ops hso_rfkill_ops = {
2528         .set_block = hso_rfkill_set_block,
2529 };
2530
2531 /* Creates and sets up everything for rfkill */
2532 static void hso_create_rfkill(struct hso_device *hso_dev,
2533                              struct usb_interface *interface)
2534 {
2535         struct hso_net *hso_net = dev2net(hso_dev);
2536         struct device *dev = &hso_net->net->dev;
2537         char *rfkn;
2538
2539         rfkn = kzalloc(20, GFP_KERNEL);
2540         if (!rfkn)
2541                 dev_err(dev, "%s - Out of memory\n", __func__);
2542
2543         snprintf(rfkn, 20, "hso-%d",
2544                  interface->altsetting->desc.bInterfaceNumber);
2545
2546         hso_net->rfkill = rfkill_alloc(rfkn,
2547                                        &interface_to_usbdev(interface)->dev,
2548                                        RFKILL_TYPE_WWAN,
2549                                        &hso_rfkill_ops, hso_dev);
2550         if (!hso_net->rfkill) {
2551                 dev_err(dev, "%s - Out of memory\n", __func__);
2552                 kfree(rfkn);
2553                 return;
2554         }
2555         if (rfkill_register(hso_net->rfkill) < 0) {
2556                 rfkill_destroy(hso_net->rfkill);
2557                 kfree(rfkn);
2558                 hso_net->rfkill = NULL;
2559                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2560                 return;
2561         }
2562 }
2563
2564 static struct device_type hso_type = {
2565         .name   = "wwan",
2566 };
2567
2568 /* Creates our network device */
2569 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2570                                                 int port_spec)
2571 {
2572         int result, i;
2573         struct net_device *net;
2574         struct hso_net *hso_net;
2575         struct hso_device *hso_dev;
2576
2577         hso_dev = hso_create_device(interface, port_spec);
2578         if (!hso_dev)
2579                 return NULL;
2580
2581         /* allocate our network device, then we can put in our private data */
2582         /* call hso_net_init to do the basic initialization */
2583         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2584         if (!net) {
2585                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2586                 goto exit;
2587         }
2588
2589         hso_net = netdev_priv(net);
2590
2591         hso_dev->port_data.dev_net = hso_net;
2592         hso_net->net = net;
2593         hso_net->parent = hso_dev;
2594
2595         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2596                                       USB_DIR_IN);
2597         if (!hso_net->in_endp) {
2598                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2599                 goto exit;
2600         }
2601         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2602                                        USB_DIR_OUT);
2603         if (!hso_net->out_endp) {
2604                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2605                 goto exit;
2606         }
2607         SET_NETDEV_DEV(net, &interface->dev);
2608         SET_NETDEV_DEVTYPE(net, &hso_type);
2609
2610         /* registering our net device */
2611         result = register_netdev(net);
2612         if (result) {
2613                 dev_err(&interface->dev, "Failed to register device\n");
2614                 goto exit;
2615         }
2616
2617         /* start allocating */
2618         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2619                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2620                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2621                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2622                         goto exit;
2623                 }
2624                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2625                                                            GFP_KERNEL);
2626                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2627                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2628                         goto exit;
2629                 }
2630         }
2631         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2632         if (!hso_net->mux_bulk_tx_urb) {
2633                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2634                 goto exit;
2635         }
2636         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2637         if (!hso_net->mux_bulk_tx_buf) {
2638                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2639                 goto exit;
2640         }
2641
2642         add_net_device(hso_dev);
2643
2644         hso_log_port(hso_dev);
2645
2646         hso_create_rfkill(hso_dev, interface);
2647
2648         return hso_dev;
2649 exit:
2650         hso_free_net_device(hso_dev);
2651         return NULL;
2652 }
2653
2654 static void hso_free_tiomget(struct hso_serial *serial)
2655 {
2656         struct hso_tiocmget *tiocmget = serial->tiocmget;
2657         if (tiocmget) {
2658                 if (tiocmget->urb) {
2659                         usb_free_urb(tiocmget->urb);
2660                         tiocmget->urb = NULL;
2661                 }
2662                 serial->tiocmget = NULL;
2663                 kfree(tiocmget);
2664
2665         }
2666 }
2667
2668 /* Frees an AT channel ( goes for both mux and non-mux ) */
2669 static void hso_free_serial_device(struct hso_device *hso_dev)
2670 {
2671         struct hso_serial *serial = dev2ser(hso_dev);
2672
2673         if (!serial)
2674                 return;
2675         set_serial_by_index(serial->minor, NULL);
2676
2677         hso_serial_common_free(serial);
2678
2679         if (serial->shared_int) {
2680                 mutex_lock(&serial->shared_int->shared_int_lock);
2681                 if (--serial->shared_int->ref_count == 0)
2682                         hso_free_shared_int(serial->shared_int);
2683                 else
2684                         mutex_unlock(&serial->shared_int->shared_int_lock);
2685         }
2686         hso_free_tiomget(serial);
2687         kfree(serial);
2688         kfree(hso_dev);
2689 }
2690
2691 /* Creates a bulk AT channel */
2692 static struct hso_device *hso_create_bulk_serial_device(
2693                         struct usb_interface *interface, int port)
2694 {
2695         struct hso_device *hso_dev;
2696         struct hso_serial *serial;
2697         int num_urbs;
2698         struct hso_tiocmget *tiocmget;
2699
2700         hso_dev = hso_create_device(interface, port);
2701         if (!hso_dev)
2702                 return NULL;
2703
2704         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2705         if (!serial)
2706                 goto exit;
2707
2708         serial->parent = hso_dev;
2709         hso_dev->port_data.dev_serial = serial;
2710
2711         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2712                 num_urbs = 2;
2713                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2714                                            GFP_KERNEL);
2715                 /* it isn't going to break our heart if serial->tiocmget
2716                  *  allocation fails don't bother checking this.
2717                  */
2718                 if (serial->tiocmget) {
2719                         tiocmget = serial->tiocmget;
2720                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2721                         if (tiocmget->urb) {
2722                                 mutex_init(&tiocmget->mutex);
2723                                 init_waitqueue_head(&tiocmget->waitq);
2724                                 tiocmget->endp = hso_get_ep(
2725                                         interface,
2726                                         USB_ENDPOINT_XFER_INT,
2727                                         USB_DIR_IN);
2728                         } else
2729                                 hso_free_tiomget(serial);
2730                 }
2731         }
2732         else
2733                 num_urbs = 1;
2734
2735         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2736                                      BULK_URB_TX_SIZE))
2737                 goto exit;
2738
2739         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2740                                      USB_DIR_IN);
2741         if (!serial->in_endp) {
2742                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2743                 goto exit2;
2744         }
2745
2746         if (!
2747             (serial->out_endp =
2748              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2749                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2750                 goto exit2;
2751         }
2752
2753         serial->write_data = hso_std_serial_write_data;
2754
2755         /* and record this serial */
2756         set_serial_by_index(serial->minor, serial);
2757
2758         /* setup the proc dirs and files if needed */
2759         hso_log_port(hso_dev);
2760
2761         /* done, return it */
2762         return hso_dev;
2763
2764 exit2:
2765         hso_serial_common_free(serial);
2766 exit:
2767         hso_free_tiomget(serial);
2768         kfree(serial);
2769         kfree(hso_dev);
2770         return NULL;
2771 }
2772
2773 /* Creates a multiplexed AT channel */
2774 static
2775 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2776                                                 int port,
2777                                                 struct hso_shared_int *mux)
2778 {
2779         struct hso_device *hso_dev;
2780         struct hso_serial *serial;
2781         int port_spec;
2782
2783         port_spec = HSO_INTF_MUX;
2784         port_spec &= ~HSO_PORT_MASK;
2785
2786         port_spec |= hso_mux_to_port(port);
2787         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2788                 return NULL;
2789
2790         hso_dev = hso_create_device(interface, port_spec);
2791         if (!hso_dev)
2792                 return NULL;
2793
2794         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2795         if (!serial)
2796                 goto exit;
2797
2798         hso_dev->port_data.dev_serial = serial;
2799         serial->parent = hso_dev;
2800
2801         if (hso_serial_common_create
2802             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2803                 goto exit;
2804
2805         serial->tx_data_length--;
2806         serial->write_data = hso_mux_serial_write_data;
2807
2808         serial->shared_int = mux;
2809         mutex_lock(&serial->shared_int->shared_int_lock);
2810         serial->shared_int->ref_count++;
2811         mutex_unlock(&serial->shared_int->shared_int_lock);
2812
2813         /* and record this serial */
2814         set_serial_by_index(serial->minor, serial);
2815
2816         /* setup the proc dirs and files if needed */
2817         hso_log_port(hso_dev);
2818
2819         /* done, return it */
2820         return hso_dev;
2821
2822 exit:
2823         if (serial) {
2824                 tty_unregister_device(tty_drv, serial->minor);
2825                 kfree(serial);
2826         }
2827         if (hso_dev)
2828                 kfree(hso_dev);
2829         return NULL;
2830
2831 }
2832
2833 static void hso_free_shared_int(struct hso_shared_int *mux)
2834 {
2835         usb_free_urb(mux->shared_intr_urb);
2836         kfree(mux->shared_intr_buf);
2837         mutex_unlock(&mux->shared_int_lock);
2838         kfree(mux);
2839 }
2840
2841 static
2842 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2843 {
2844         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2845
2846         if (!mux)
2847                 return NULL;
2848
2849         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2850                                     USB_DIR_IN);
2851         if (!mux->intr_endp) {
2852                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2853                 goto exit;
2854         }
2855
2856         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2857         if (!mux->shared_intr_urb) {
2858                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2859                 goto exit;
2860         }
2861         mux->shared_intr_buf =
2862                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2863                         GFP_KERNEL);
2864         if (!mux->shared_intr_buf) {
2865                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2866                 goto exit;
2867         }
2868
2869         mutex_init(&mux->shared_int_lock);
2870
2871         return mux;
2872
2873 exit:
2874         kfree(mux->shared_intr_buf);
2875         usb_free_urb(mux->shared_intr_urb);
2876         kfree(mux);
2877         return NULL;
2878 }
2879
2880 /* Gets the port spec for a certain interface */
2881 static int hso_get_config_data(struct usb_interface *interface)
2882 {
2883         struct usb_device *usbdev = interface_to_usbdev(interface);
2884         u8 config_data[17];
2885         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2886         s32 result;
2887
2888         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2889                             0x86, 0xC0, 0, 0, config_data, 17,
2890                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2891                 return -EIO;
2892         }
2893
2894         switch (config_data[if_num]) {
2895         case 0x0:
2896                 result = 0;
2897                 break;
2898         case 0x1:
2899                 result = HSO_PORT_DIAG;
2900                 break;
2901         case 0x2:
2902                 result = HSO_PORT_GPS;
2903                 break;
2904         case 0x3:
2905                 result = HSO_PORT_GPS_CONTROL;
2906                 break;
2907         case 0x4:
2908                 result = HSO_PORT_APP;
2909                 break;
2910         case 0x5:
2911                 result = HSO_PORT_APP2;
2912                 break;
2913         case 0x6:
2914                 result = HSO_PORT_CONTROL;
2915                 break;
2916         case 0x7:
2917                 result = HSO_PORT_NETWORK;
2918                 break;
2919         case 0x8:
2920                 result = HSO_PORT_MODEM;
2921                 break;
2922         case 0x9:
2923                 result = HSO_PORT_MSD;
2924                 break;
2925         case 0xa:
2926                 result = HSO_PORT_PCSC;
2927                 break;
2928         case 0xb:
2929                 result = HSO_PORT_VOICE;
2930                 break;
2931         default:
2932                 result = 0;
2933         }
2934
2935         if (result)
2936                 result |= HSO_INTF_BULK;
2937
2938         if (config_data[16] & 0x1)
2939                 result |= HSO_INFO_CRC_BUG;
2940
2941         return result;
2942 }
2943
2944 /* called once for each interface upon device insertion */
2945 static int hso_probe(struct usb_interface *interface,
2946                      const struct usb_device_id *id)
2947 {
2948         int mux, i, if_num, port_spec;
2949         unsigned char port_mask;
2950         struct hso_device *hso_dev = NULL;
2951         struct hso_shared_int *shared_int;
2952         struct hso_device *tmp_dev = NULL;
2953
2954         if_num = interface->altsetting->desc.bInterfaceNumber;
2955
2956         /* Get the interface/port specification from either driver_info or from
2957          * the device itself */
2958         if (id->driver_info)
2959                 port_spec = ((u32 *)(id->driver_info))[if_num];
2960         else
2961                 port_spec = hso_get_config_data(interface);
2962
2963         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2964                 dev_err(&interface->dev, "Not our interface\n");
2965                 return -ENODEV;
2966         }
2967         /* Check if we need to switch to alt interfaces prior to port
2968          * configuration */
2969         if (interface->num_altsetting > 1)
2970                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2971         interface->needs_remote_wakeup = 1;
2972
2973         /* Allocate new hso device(s) */
2974         switch (port_spec & HSO_INTF_MASK) {
2975         case HSO_INTF_MUX:
2976                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2977                         /* Create the network device */
2978                         if (!disable_net) {
2979                                 hso_dev = hso_create_net_device(interface,
2980                                                                 port_spec);
2981                                 if (!hso_dev)
2982                                         goto exit;
2983                                 tmp_dev = hso_dev;
2984                         }
2985                 }
2986
2987                 if (hso_get_mux_ports(interface, &port_mask))
2988                         /* TODO: de-allocate everything */
2989                         goto exit;
2990
2991                 shared_int = hso_create_shared_int(interface);
2992                 if (!shared_int)
2993                         goto exit;
2994
2995                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2996                         if (port_mask & i) {
2997                                 hso_dev = hso_create_mux_serial_device(
2998                                                 interface, i, shared_int);
2999                                 if (!hso_dev)
3000                                         goto exit;
3001                         }
3002                 }
3003
3004                 if (tmp_dev)
3005                         hso_dev = tmp_dev;
3006                 break;
3007
3008         case HSO_INTF_BULK:
3009                 /* It's a regular bulk interface */
3010                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3011                     !disable_net)
3012                         hso_dev = hso_create_net_device(interface, port_spec);
3013                 else
3014                         hso_dev =
3015                             hso_create_bulk_serial_device(interface, port_spec);
3016                 if (!hso_dev)
3017                         goto exit;
3018                 break;
3019         default:
3020                 goto exit;
3021         }
3022
3023         /* save our data pointer in this device */
3024         usb_set_intfdata(interface, hso_dev);
3025
3026         /* done */
3027         return 0;
3028 exit:
3029         hso_free_interface(interface);
3030         return -ENODEV;
3031 }
3032
3033 /* device removed, cleaning up */
3034 static void hso_disconnect(struct usb_interface *interface)
3035 {
3036         hso_free_interface(interface);
3037
3038         /* remove reference of our private data */
3039         usb_set_intfdata(interface, NULL);
3040 }
3041
3042 static void async_get_intf(struct work_struct *data)
3043 {
3044         struct hso_device *hso_dev =
3045             container_of(data, struct hso_device, async_get_intf);
3046         usb_autopm_get_interface(hso_dev->interface);
3047 }
3048
3049 static void async_put_intf(struct work_struct *data)
3050 {
3051         struct hso_device *hso_dev =
3052             container_of(data, struct hso_device, async_put_intf);
3053         usb_autopm_put_interface(hso_dev->interface);
3054 }
3055
3056 static int hso_get_activity(struct hso_device *hso_dev)
3057 {
3058         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3059                 if (!hso_dev->is_active) {
3060                         hso_dev->is_active = 1;
3061                         schedule_work(&hso_dev->async_get_intf);
3062                 }
3063         }
3064
3065         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3066                 return -EAGAIN;
3067
3068         usb_mark_last_busy(hso_dev->usb);
3069
3070         return 0;
3071 }
3072
3073 static int hso_put_activity(struct hso_device *hso_dev)
3074 {
3075         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3076                 if (hso_dev->is_active) {
3077                         hso_dev->is_active = 0;
3078                         schedule_work(&hso_dev->async_put_intf);
3079                         return -EAGAIN;
3080                 }
3081         }
3082         hso_dev->is_active = 0;
3083         return 0;
3084 }
3085
3086 /* called by kernel when we need to suspend device */
3087 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3088 {
3089         int i, result;
3090
3091         /* Stop all serial ports */
3092         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3093                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3094                         result = hso_stop_serial_device(serial_table[i]);
3095                         if (result)
3096                                 goto out;
3097                 }
3098         }
3099
3100         /* Stop all network ports */
3101         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3102                 if (network_table[i] &&
3103                     (network_table[i]->interface == iface)) {
3104                         result = hso_stop_net_device(network_table[i]);
3105                         if (result)
3106                                 goto out;
3107                 }
3108         }
3109
3110 out:
3111         return 0;
3112 }
3113
3114 /* called by kernel when we need to resume device */
3115 static int hso_resume(struct usb_interface *iface)
3116 {
3117         int i, result = 0;
3118         struct hso_net *hso_net;
3119
3120         /* Start all serial ports */
3121         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3122                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3123                         if (dev2ser(serial_table[i])->open_count) {
3124                                 result =
3125                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3126                                 hso_kick_transmit(dev2ser(serial_table[i]));
3127                                 if (result)
3128                                         goto out;
3129                         }
3130                 }
3131         }
3132
3133         /* Start all network ports */
3134         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3135                 if (network_table[i] &&
3136                     (network_table[i]->interface == iface)) {
3137                         hso_net = dev2net(network_table[i]);
3138                         if (hso_net->flags & IFF_UP) {
3139                                 /* First transmit any lingering data,
3140                                    then restart the device. */
3141                                 if (hso_net->skb_tx_buf) {
3142                                         dev_dbg(&iface->dev,
3143                                                 "Transmitting"
3144                                                 " lingering data\n");
3145                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3146                                                            hso_net->net);
3147                                         hso_net->skb_tx_buf = NULL;
3148                                 }
3149                                 result = hso_start_net_device(network_table[i]);
3150                                 if (result)
3151                                         goto out;
3152                         }
3153                 }
3154         }
3155
3156 out:
3157         return result;
3158 }
3159
3160 static void reset_device(struct work_struct *data)
3161 {
3162         struct hso_device *hso_dev =
3163             container_of(data, struct hso_device, reset_device);
3164         struct usb_device *usb = hso_dev->usb;
3165         int result;
3166
3167         if (hso_dev->usb_gone) {
3168                 D1("No reset during disconnect\n");
3169         } else {
3170                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3171                 if (result < 0)
3172                         D1("unable to lock device for reset: %d\n", result);
3173                 else {
3174                         usb_reset_device(usb);
3175                         usb_unlock_device(usb);
3176                 }
3177         }
3178 }
3179
3180 static void hso_serial_ref_free(struct kref *ref)
3181 {
3182         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3183
3184         hso_free_serial_device(hso_dev);
3185 }
3186
3187 static void hso_free_interface(struct usb_interface *interface)
3188 {
3189         struct hso_serial *hso_dev;
3190         struct tty_struct *tty;
3191         int i;
3192
3193         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3194                 if (serial_table[i] &&
3195                     (serial_table[i]->interface == interface)) {
3196                         hso_dev = dev2ser(serial_table[i]);
3197                         spin_lock_irq(&hso_dev->serial_lock);
3198                         tty = tty_kref_get(hso_dev->tty);
3199                         spin_unlock_irq(&hso_dev->serial_lock);
3200                         if (tty)
3201                                 tty_hangup(tty);
3202                         mutex_lock(&hso_dev->parent->mutex);
3203                         tty_kref_put(tty);
3204                         hso_dev->parent->usb_gone = 1;
3205                         mutex_unlock(&hso_dev->parent->mutex);
3206                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3207                 }
3208         }
3209
3210         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3211                 if (network_table[i] &&
3212                     (network_table[i]->interface == interface)) {
3213                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3214                         /* hso_stop_net_device doesn't stop the net queue since
3215                          * traffic needs to start it again when suspended */
3216                         netif_stop_queue(dev2net(network_table[i])->net);
3217                         hso_stop_net_device(network_table[i]);
3218                         cancel_work_sync(&network_table[i]->async_put_intf);
3219                         cancel_work_sync(&network_table[i]->async_get_intf);
3220                         if (rfk) {
3221                                 rfkill_unregister(rfk);
3222                                 rfkill_destroy(rfk);
3223                         }
3224                         hso_free_net_device(network_table[i]);
3225                 }
3226         }
3227 }
3228
3229 /* Helper functions */
3230
3231 /* Get the endpoint ! */
3232 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3233                                                   int type, int dir)
3234 {
3235         int i;
3236         struct usb_host_interface *iface = intf->cur_altsetting;
3237         struct usb_endpoint_descriptor *endp;
3238
3239         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3240                 endp = &iface->endpoint[i].desc;
3241                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3242                     (usb_endpoint_type(endp) == type))
3243                         return endp;
3244         }
3245
3246         return NULL;
3247 }
3248
3249 /* Get the byte that describes which ports are enabled */
3250 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3251 {
3252         int i;
3253         struct usb_host_interface *iface = intf->cur_altsetting;
3254
3255         if (iface->extralen == 3) {
3256                 *ports = iface->extra[2];
3257                 return 0;
3258         }
3259
3260         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3261                 if (iface->endpoint[i].extralen == 3) {
3262                         *ports = iface->endpoint[i].extra[2];
3263                         return 0;
3264                 }
3265         }
3266
3267         return -1;
3268 }
3269
3270 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3271 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3272                                    struct usb_device *usb, gfp_t gfp)
3273 {
3274         int result;
3275
3276         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3277                          usb_rcvintpipe(usb,
3278                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3279                          shared_int->shared_intr_buf,
3280                          1,
3281                          intr_callback, shared_int,
3282                          shared_int->intr_endp->bInterval);
3283
3284         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3285         if (result)
3286                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3287                         result);
3288
3289         return result;
3290 }
3291
3292 /* operations setup of the serial interface */
3293 static const struct tty_operations hso_serial_ops = {
3294         .open = hso_serial_open,
3295         .close = hso_serial_close,
3296         .write = hso_serial_write,
3297         .write_room = hso_serial_write_room,
3298         .ioctl = hso_serial_ioctl,
3299         .set_termios = hso_serial_set_termios,
3300         .chars_in_buffer = hso_serial_chars_in_buffer,
3301         .tiocmget = hso_serial_tiocmget,
3302         .tiocmset = hso_serial_tiocmset,
3303         .unthrottle = hso_unthrottle
3304 };
3305
3306 static struct usb_driver hso_driver = {
3307         .name = driver_name,
3308         .probe = hso_probe,
3309         .disconnect = hso_disconnect,
3310         .id_table = hso_ids,
3311         .suspend = hso_suspend,
3312         .resume = hso_resume,
3313         .reset_resume = hso_resume,
3314         .supports_autosuspend = 1,
3315 };
3316
3317 static int __init hso_init(void)
3318 {
3319         int i;
3320         int result;
3321
3322         /* put it in the log */
3323         printk(KERN_INFO "hso: %s\n", version);
3324
3325         /* Initialise the serial table semaphore and table */
3326         spin_lock_init(&serial_table_lock);
3327         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3328                 serial_table[i] = NULL;
3329
3330         /* allocate our driver using the proper amount of supported minors */
3331         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3332         if (!tty_drv)
3333                 return -ENOMEM;
3334
3335         /* fill in all needed values */
3336         tty_drv->magic = TTY_DRIVER_MAGIC;
3337         tty_drv->owner = THIS_MODULE;
3338         tty_drv->driver_name = driver_name;
3339         tty_drv->name = tty_filename;
3340
3341         /* if major number is provided as parameter, use that one */
3342         if (tty_major)
3343                 tty_drv->major = tty_major;
3344
3345         tty_drv->minor_start = 0;
3346         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3347         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3348         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3349         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3350         tty_drv->init_termios = tty_std_termios;
3351         hso_init_termios(&tty_drv->init_termios);
3352         tty_set_operations(tty_drv, &hso_serial_ops);
3353
3354         /* register the tty driver */
3355         result = tty_register_driver(tty_drv);
3356         if (result) {
3357                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3358                         __func__, result);
3359                 return result;
3360         }
3361
3362         /* register this module as an usb driver */
3363         result = usb_register(&hso_driver);
3364         if (result) {
3365                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3366                         result);
3367                 /* cleanup serial interface */
3368                 tty_unregister_driver(tty_drv);
3369                 return result;
3370         }
3371
3372         /* done */
3373         return 0;
3374 }
3375
3376 static void __exit hso_exit(void)
3377 {
3378         printk(KERN_INFO "hso: unloaded\n");
3379
3380         tty_unregister_driver(tty_drv);
3381         /* deregister the usb driver */
3382         usb_deregister(&hso_driver);
3383 }
3384
3385 /* Module definitions */
3386 module_init(hso_init);
3387 module_exit(hso_exit);
3388
3389 MODULE_AUTHOR(MOD_AUTHOR);
3390 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3391 MODULE_LICENSE(MOD_LICENSE);
3392 MODULE_INFO(Version, DRIVER_VERSION);
3393
3394 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3395 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3396 module_param(debug, int, S_IRUGO | S_IWUSR);
3397
3398 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3399 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3400 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3401
3402 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3403 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3404 module_param(disable_net, int, S_IRUGO | S_IWUSR);