drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
   7  *                      <ajb@spheresystems.co.uk>
   8  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
   9  *  Copyright (C) 2008 Novell, Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  23  *  USA
  24  *
  25  *
  26  *****************************************************************************/
  27
  28 /******************************************************************************
  29  *
  30  * Description of the device:
  31  *
  32  * Interface 0: Contains the IP network interface on the bulk end points.
  33  *              The multiplexed serial ports are using the interrupt and
  34  *              control endpoints.
  35  *              Interrupt contains a bitmap telling which multiplexed
  36  *              serialport needs servicing.
  37  *
  38  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  39  *              port is opened, as this have a huge impact on the network port
  40  *              throughput.
  41  *
  42  * Interface 2: Standard modem interface - circuit switched interface, should
  43  *              not be used.
  44  *
  45  *****************************************************************************/
  46
  47 #include <linux/sched.h>
  48 #include <linux/slab.h>
  49 #include <linux/init.h>
  50 #include <linux/delay.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/module.h>
  53 #include <linux/ethtool.h>
  54 #include <linux/usb.h>
  55 #include <linux/timer.h>
  56 #include <linux/tty.h>
  57 #include <linux/tty_driver.h>
  58 #include <linux/tty_flip.h>
  59 #include <linux/kmod.h>
  60 #include <linux/rfkill.h>
  61 #include <linux/ip.h>
  62 #include <linux/uaccess.h>
  63 #include <linux/usb/cdc.h>
  64 #include <net/arp.h>
  65 #include <asm/byteorder.h>
  66
  67
  68 #define DRIVER_VERSION                  "1.2"
  69 #define MOD_AUTHOR                      "Option Wireless"
  70 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  71 #define MOD_LICENSE                     "GPL"
  72
  73 #define HSO_MAX_NET_DEVICES             10
  74 #define HSO__MAX_MTU                    2048
  75 #define DEFAULT_MTU                     1500
  76 #define DEFAULT_MRU                     1500
  77
  78 #define CTRL_URB_RX_SIZE                1024
  79 #define CTRL_URB_TX_SIZE                64
  80
  81 #define BULK_URB_RX_SIZE                4096
  82 #define BULK_URB_TX_SIZE                8192
  83
  84 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  85 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  86 #define MUX_BULK_RX_BUF_COUNT           4
  87 #define USB_TYPE_OPTION_VENDOR          0x20
  88
  89 /* These definitions are used with the struct hso_net flags element */
  90 /* - use *_bit operations on it. (bit indices not values.) */
  91 #define HSO_NET_RUNNING                 0
  92
  93 #define HSO_NET_TX_TIMEOUT              (HZ*10)
  94
  95 #define HSO_SERIAL_MAGIC                0x48534f31
  96
  97 /* Number of ttys to handle */
  98 #define HSO_SERIAL_TTY_MINORS           256
  99
 100 #define MAX_RX_URBS                     2
 101
 102 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 103 {
 104         if (tty)
 105                 return tty->driver_data;
 106         return NULL;
 107 }
 108
 109 /*****************************************************************************/
 110 /* Debugging functions                                                       */
 111 /*****************************************************************************/
 112 #define D__(lvl_, fmt, arg...)                          \
 113         do {                                            \
 114                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 115                        __LINE__, __func__, ## arg);     \
 116         } while (0)
 117
 118 #define D_(lvl, args...)                                \
 119         do {                                            \
 120                 if (lvl & debug)                        \
 121                         D__(KERN_INFO, args);           \
 122         } while (0)
 123
 124 #define D1(args...)     D_(0x01, ##args)
 125 #define D2(args...)     D_(0x02, ##args)
 126 #define D3(args...)     D_(0x04, ##args)
 127 #define D4(args...)     D_(0x08, ##args)
 128 #define D5(args...)     D_(0x10, ##args)
 129
 130 /*****************************************************************************/
 131 /* Enumerators                                                               */
 132 /*****************************************************************************/
 133 enum pkt_parse_state {
 134         WAIT_IP,
 135         WAIT_DATA,
 136         WAIT_SYNC
 137 };
 138
 139 /*****************************************************************************/
 140 /* Structs                                                                   */
 141 /*****************************************************************************/
 142
 143 struct hso_shared_int {
 144         struct usb_endpoint_descriptor *intr_endp;
 145         void *shared_intr_buf;
 146         struct urb *shared_intr_urb;
 147         struct usb_device *usb;
 148         int use_count;
 149         int ref_count;
 150         struct mutex shared_int_lock;
 151 };
 152
 153 struct hso_net {
 154         struct hso_device *parent;
 155         struct net_device *net;
 156         struct rfkill *rfkill;
 157
 158         struct usb_endpoint_descriptor *in_endp;
 159         struct usb_endpoint_descriptor *out_endp;
 160
 161         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 162         struct urb *mux_bulk_tx_urb;
 163         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 164         void *mux_bulk_tx_buf;
 165
 166         struct sk_buff *skb_rx_buf;
 167         struct sk_buff *skb_tx_buf;
 168
 169         enum pkt_parse_state rx_parse_state;
 170         spinlock_t net_lock;
 171
 172         unsigned short rx_buf_size;
 173         unsigned short rx_buf_missing;
 174         struct iphdr rx_ip_hdr;
 175
 176         unsigned long flags;
 177 };
 178
 179 enum rx_ctrl_state{
 180         RX_IDLE,
 181         RX_SENT,
 182         RX_PENDING
 183 };
 184
 185 struct hso_serial {
 186         struct hso_device *parent;
 187         int magic;
 188         u8 minor;
 189
 190         struct hso_shared_int *shared_int;
 191
 192         /* rx/tx urb could be either a bulk urb or a control urb depending
 193            on which serial port it is used on. */
 194         struct urb *rx_urb[MAX_RX_URBS];
 195         u8 num_rx_urbs;
 196         u8 *rx_data[MAX_RX_URBS];
 197         u16 rx_data_length;     /* should contain allocated length */
 198
 199         struct urb *tx_urb;
 200         u8 *tx_data;
 201         u8 *tx_buffer;
 202         u16 tx_data_length;     /* should contain allocated length */
 203         u16 tx_data_count;
 204         u16 tx_buffer_count;
 205         struct usb_ctrlrequest ctrl_req_tx;
 206         struct usb_ctrlrequest ctrl_req_rx;
 207
 208         struct usb_endpoint_descriptor *in_endp;
 209         struct usb_endpoint_descriptor *out_endp;
 210
 211         enum rx_ctrl_state rx_state;
 212         u8 rts_state;
 213         u8 dtr_state;
 214         unsigned tx_urb_used:1;
 215
 216         /* from usb_serial_port */
 217         struct tty_struct *tty;
 218         int open_count;
 219         spinlock_t serial_lock;
 220
 221         int (*write_data) (struct hso_serial *serial);
 222         /* Hacks required to get flow control
 223          * working on the serial receive buffers
 224          * so as not to drop characters on the floor.
 225          */
 226         int  curr_rx_urb_idx;
 227         u16  curr_rx_urb_offset;
 228         u8   rx_urb_filled[MAX_RX_URBS];
 229         struct tasklet_struct unthrottle_tasklet;
 230         struct work_struct    retry_unthrottle_workqueue;
 231 };
 232
 233 struct hso_device {
 234         union {
 235                 struct hso_serial *dev_serial;
 236                 struct hso_net *dev_net;
 237         } port_data;
 238
 239         u32 port_spec;
 240
 241         u8 is_active;
 242         u8 usb_gone;
 243         struct work_struct async_get_intf;
 244         struct work_struct async_put_intf;
 245
 246         struct usb_device *usb;
 247         struct usb_interface *interface;
 248
 249         struct device *dev;
 250         struct kref ref;
 251         struct mutex mutex;
 252 };
 253
 254 /* Type of interface */
 255 #define HSO_INTF_MASK           0xFF00
 256 #define HSO_INTF_MUX            0x0100
 257 #define HSO_INTF_BULK           0x0200
 258
 259 /* Type of port */
 260 #define HSO_PORT_MASK           0xFF
 261 #define HSO_PORT_NO_PORT        0x0
 262 #define HSO_PORT_CONTROL        0x1
 263 #define HSO_PORT_APP            0x2
 264 #define HSO_PORT_GPS            0x3
 265 #define HSO_PORT_PCSC           0x4
 266 #define HSO_PORT_APP2           0x5
 267 #define HSO_PORT_GPS_CONTROL    0x6
 268 #define HSO_PORT_MSD            0x7
 269 #define HSO_PORT_VOICE          0x8
 270 #define HSO_PORT_DIAG2          0x9
 271 #define HSO_PORT_DIAG           0x10
 272 #define HSO_PORT_MODEM          0x11
 273 #define HSO_PORT_NETWORK        0x12
 274
 275 /* Additional device info */
 276 #define HSO_INFO_MASK           0xFF000000
 277 #define HSO_INFO_CRC_BUG        0x01000000
 278
 279 /*****************************************************************************/
 280 /* Prototypes                                                                */
 281 /*****************************************************************************/
 282 /* Serial driver functions */
 283 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 284                                unsigned int set, unsigned int clear);
 285 static void ctrl_callback(struct urb *urb);
 286 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 287 static void hso_kick_transmit(struct hso_serial *serial);
 288 /* Helper functions */
 289 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 290                                    struct usb_device *usb, gfp_t gfp);
 291 static void log_usb_status(int status, const char *function);
 292 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 293                                                   int type, int dir);
 294 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 295 static void hso_free_interface(struct usb_interface *intf);
 296 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 297 static int hso_stop_serial_device(struct hso_device *hso_dev);
 298 static int hso_start_net_device(struct hso_device *hso_dev);
 299 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 300 static int hso_stop_net_device(struct hso_device *hso_dev);
 301 static void hso_serial_ref_free(struct kref *ref);
 302 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 303 static int hso_mux_serial_read(struct hso_serial *serial);
 304 static void async_get_intf(struct work_struct *data);
 305 static void async_put_intf(struct work_struct *data);
 306 static int hso_put_activity(struct hso_device *hso_dev);
 307 static int hso_get_activity(struct hso_device *hso_dev);
 308
 309 /*****************************************************************************/
 310 /* Helping functions                                                         */
 311 /*****************************************************************************/
 312
 313 /* #define DEBUG */
 314
 315 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 316 {
 317         return hso_dev->port_data.dev_net;
 318 }
 319
 320 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 321 {
 322         return hso_dev->port_data.dev_serial;
 323 }
 324
 325 /* Debugging functions */
 326 #ifdef DEBUG
 327 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 328                      unsigned int len)
 329 {
 330         static char name[255];
 331
 332         sprintf(name, "hso[%d:%s]", line_count, func_name);
 333         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 334 }
 335
 336 #define DUMP(buf_, len_)        \
 337         dbg_dump(__LINE__, __func__, buf_, len_)
 338
 339 #define DUMP1(buf_, len_)                       \
 340         do {                                    \
 341                 if (0x01 & debug)               \
 342                         DUMP(buf_, len_);       \
 343         } while (0)
 344 #else
 345 #define DUMP(buf_, len_)
 346 #define DUMP1(buf_, len_)
 347 #endif
 348
 349 /* module parameters */
 350 static int debug;
 351 static int tty_major;
 352 static int disable_net;
 353
 354 /* driver info */
 355 static const char driver_name[] = "hso";
 356 static const char tty_filename[] = "ttyHS";
 357 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 358 /* the usb driver itself (registered in hso_init) */
 359 static struct usb_driver hso_driver;
 360 /* serial structures */
 361 static struct tty_driver *tty_drv;
 362 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 363 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 364 static spinlock_t serial_table_lock;
 365 static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
 366 static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
 367
 368 static const s32 default_port_spec[] = {
 369         HSO_INTF_MUX | HSO_PORT_NETWORK,
 370         HSO_INTF_BULK | HSO_PORT_DIAG,
 371         HSO_INTF_BULK | HSO_PORT_MODEM,
 372         0
 373 };
 374
 375 static const s32 icon321_port_spec[] = {
 376         HSO_INTF_MUX | HSO_PORT_NETWORK,
 377         HSO_INTF_BULK | HSO_PORT_DIAG2,
 378         HSO_INTF_BULK | HSO_PORT_MODEM,
 379         HSO_INTF_BULK | HSO_PORT_DIAG,
 380         0
 381 };
 382
 383 #define default_port_device(vendor, product)    \
 384         USB_DEVICE(vendor, product),    \
 385                 .driver_info = (kernel_ulong_t)default_port_spec
 386
 387 #define icon321_port_device(vendor, product)    \
 388         USB_DEVICE(vendor, product),    \
 389                 .driver_info = (kernel_ulong_t)icon321_port_spec
 390
 391 /* list of devices we support */
 392 static const struct usb_device_id hso_ids[] = {
 393         {default_port_device(0x0af0, 0x6711)},
 394         {default_port_device(0x0af0, 0x6731)},
 395         {default_port_device(0x0af0, 0x6751)},
 396         {default_port_device(0x0af0, 0x6771)},
 397         {default_port_device(0x0af0, 0x6791)},
 398         {default_port_device(0x0af0, 0x6811)},
 399         {default_port_device(0x0af0, 0x6911)},
 400         {default_port_device(0x0af0, 0x6951)},
 401         {default_port_device(0x0af0, 0x6971)},
 402         {default_port_device(0x0af0, 0x7011)},
 403         {default_port_device(0x0af0, 0x7031)},
 404         {default_port_device(0x0af0, 0x7051)},
 405         {default_port_device(0x0af0, 0x7071)},
 406         {default_port_device(0x0af0, 0x7111)},
 407         {default_port_device(0x0af0, 0x7211)},
 408         {default_port_device(0x0af0, 0x7251)},
 409         {default_port_device(0x0af0, 0x7271)},
 410         {default_port_device(0x0af0, 0x7311)},
 411         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 412         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 413         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 414         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 415         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 416         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 417         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 418         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 419         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 420         {USB_DEVICE(0x0af0, 0x7701)},
 421         {USB_DEVICE(0x0af0, 0x7801)},
 422         {USB_DEVICE(0x0af0, 0x7901)},
 423         {USB_DEVICE(0x0af0, 0x7361)},
 424         {icon321_port_device(0x0af0, 0xd051)},
 425         {}
 426 };
 427 MODULE_DEVICE_TABLE(usb, hso_ids);
 428
 429 /* Sysfs attribute */
 430 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 431                                        struct device_attribute *attr,
 432                                        char *buf)
 433 {
 434         struct hso_device *hso_dev = dev->driver_data;
 435         char *port_name;
 436
 437         if (!hso_dev)
 438                 return 0;
 439
 440         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 441         case HSO_PORT_CONTROL:
 442                 port_name = "Control";
 443                 break;
 444         case HSO_PORT_APP:
 445                 port_name = "Application";
 446                 break;
 447         case HSO_PORT_APP2:
 448                 port_name = "Application2";
 449                 break;
 450         case HSO_PORT_GPS:
 451                 port_name = "GPS";
 452                 break;
 453         case HSO_PORT_GPS_CONTROL:
 454                 port_name = "GPS Control";
 455                 break;
 456         case HSO_PORT_PCSC:
 457                 port_name = "PCSC";
 458                 break;
 459         case HSO_PORT_DIAG:
 460                 port_name = "Diagnostic";
 461                 break;
 462         case HSO_PORT_DIAG2:
 463                 port_name = "Diagnostic2";
 464                 break;
 465         case HSO_PORT_MODEM:
 466                 port_name = "Modem";
 467                 break;
 468         case HSO_PORT_NETWORK:
 469                 port_name = "Network";
 470                 break;
 471         default:
 472                 port_name = "Unknown";
 473                 break;
 474         }
 475
 476         return sprintf(buf, "%s\n", port_name);
 477 }
 478 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 479
 480 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 481 {
 482         int idx;
 483
 484         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 485                 if (serial->rx_urb[idx] == urb)
 486                         return idx;
 487         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 488         return -1;
 489 }
 490
 491 /* converts mux value to a port spec value */
 492 static u32 hso_mux_to_port(int mux)
 493 {
 494         u32 result;
 495
 496         switch (mux) {
 497         case 0x1:
 498                 result = HSO_PORT_CONTROL;
 499                 break;
 500         case 0x2:
 501                 result = HSO_PORT_APP;
 502                 break;
 503         case 0x4:
 504                 result = HSO_PORT_PCSC;
 505                 break;
 506         case 0x8:
 507                 result = HSO_PORT_GPS;
 508                 break;
 509         case 0x10:
 510                 result = HSO_PORT_APP2;
 511                 break;
 512         default:
 513                 result = HSO_PORT_NO_PORT;
 514         }
 515         return result;
 516 }
 517
 518 /* converts port spec value to a mux value */
 519 static u32 hso_port_to_mux(int port)
 520 {
 521         u32 result;
 522
 523         switch (port & HSO_PORT_MASK) {
 524         case HSO_PORT_CONTROL:
 525                 result = 0x0;
 526                 break;
 527         case HSO_PORT_APP:
 528                 result = 0x1;
 529                 break;
 530         case HSO_PORT_PCSC:
 531                 result = 0x2;
 532                 break;
 533         case HSO_PORT_GPS:
 534                 result = 0x3;
 535                 break;
 536         case HSO_PORT_APP2:
 537                 result = 0x4;
 538                 break;
 539         default:
 540                 result = 0x0;
 541         }
 542         return result;
 543 }
 544
 545 static struct hso_serial *get_serial_by_shared_int_and_type(
 546                                         struct hso_shared_int *shared_int,
 547                                         int mux)
 548 {
 549         int i, port;
 550
 551         port = hso_mux_to_port(mux);
 552
 553         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 554                 if (serial_table[i]
 555                     && (dev2ser(serial_table[i])->shared_int == shared_int)
 556                     && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 557                         return dev2ser(serial_table[i]);
 558                 }
 559         }
 560
 561         return NULL;
 562 }
 563
 564 static struct hso_serial *get_serial_by_index(unsigned index)
 565 {
 566         struct hso_serial *serial = NULL;
 567         unsigned long flags;
 568
 569         spin_lock_irqsave(&serial_table_lock, flags);
 570         if (serial_table[index])
 571                 serial = dev2ser(serial_table[index]);
 572         spin_unlock_irqrestore(&serial_table_lock, flags);
 573
 574         return serial;
 575 }
 576
 577 static int get_free_serial_index(void)
 578 {
 579         int index;
 580         unsigned long flags;
 581
 582         spin_lock_irqsave(&serial_table_lock, flags);
 583         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 584                 if (serial_table[index] == NULL) {
 585                         spin_unlock_irqrestore(&serial_table_lock, flags);
 586                         return index;
 587                 }
 588         }
 589         spin_unlock_irqrestore(&serial_table_lock, flags);
 590
 591         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 592         return -1;
 593 }
 594
 595 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 596 {
 597         unsigned long flags;
 598
 599         spin_lock_irqsave(&serial_table_lock, flags);
 600         if (serial)
 601                 serial_table[index] = serial->parent;
 602         else
 603                 serial_table[index] = NULL;
 604         spin_unlock_irqrestore(&serial_table_lock, flags);
 605 }
 606
 607 /* log a meaningful explanation of an USB status */
 608 static void log_usb_status(int status, const char *function)
 609 {
 610         char *explanation;
 611
 612         switch (status) {
 613         case -ENODEV:
 614                 explanation = "no device";
 615                 break;
 616         case -ENOENT:
 617                 explanation = "endpoint not enabled";
 618                 break;
 619         case -EPIPE:
 620                 explanation = "endpoint stalled";
 621                 break;
 622         case -ENOSPC:
 623                 explanation = "not enough bandwidth";
 624                 break;
 625         case -ESHUTDOWN:
 626                 explanation = "device disabled";
 627                 break;
 628         case -EHOSTUNREACH:
 629                 explanation = "device suspended";
 630                 break;
 631         case -EINVAL:
 632         case -EAGAIN:
 633         case -EFBIG:
 634         case -EMSGSIZE:
 635                 explanation = "internal error";
 636                 break;
 637         default:
 638                 explanation = "unknown status";
 639                 break;
 640         }
 641         D1("%s: received USB status - %s (%d)", function, explanation, status);
 642 }
 643
 644 /* Network interface functions */
 645
 646 /* called when net interface is brought up by ifconfig */
 647 static int hso_net_open(struct net_device *net)
 648 {
 649         struct hso_net *odev = netdev_priv(net);
 650         unsigned long flags = 0;
 651
 652         if (!odev) {
 653                 dev_err(&net->dev, "No net device !\n");
 654                 return -ENODEV;
 655         }
 656
 657         odev->skb_tx_buf = NULL;
 658
 659         /* setup environment */
 660         spin_lock_irqsave(&odev->net_lock, flags);
 661         odev->rx_parse_state = WAIT_IP;
 662         odev->rx_buf_size = 0;
 663         odev->rx_buf_missing = sizeof(struct iphdr);
 664         spin_unlock_irqrestore(&odev->net_lock, flags);
 665
 666         /* We are up and running. */
 667         set_bit(HSO_NET_RUNNING, &odev->flags);
 668         hso_start_net_device(odev->parent);
 669
 670         /* Tell the kernel we are ready to start receiving from it */
 671         netif_start_queue(net);
 672
 673         return 0;
 674 }
 675
 676 /* called when interface is brought down by ifconfig */
 677 static int hso_net_close(struct net_device *net)
 678 {
 679         struct hso_net *odev = netdev_priv(net);
 680
 681         /* we don't need the queue anymore */
 682         netif_stop_queue(net);
 683         /* no longer running */
 684         clear_bit(HSO_NET_RUNNING, &odev->flags);
 685
 686         hso_stop_net_device(odev->parent);
 687
 688         /* done */
 689         return 0;
 690 }
 691
 692 /* USB tells is xmit done, we should start the netqueue again */
 693 static void write_bulk_callback(struct urb *urb)
 694 {
 695         struct hso_net *odev = urb->context;
 696         int status = urb->status;
 697
 698         /* Sanity check */
 699         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 700                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 701                 return;
 702         }
 703
 704         /* Do we still have a valid kernel network device? */
 705         if (!netif_device_present(odev->net)) {
 706                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 707                         __func__);
 708                 return;
 709         }
 710
 711         /* log status, but don't act on it, we don't need to resubmit anything
 712          * anyhow */
 713         if (status)
 714                 log_usb_status(status, __func__);
 715
 716         hso_put_activity(odev->parent);
 717
 718         /* Tell the network interface we are ready for another frame */
 719         netif_wake_queue(odev->net);
 720 }
 721
 722 /* called by kernel when we need to transmit a packet */
 723 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 724 {
 725         struct hso_net *odev = netdev_priv(net);
 726         int result;
 727
 728         /* Tell the kernel, "No more frames 'til we are done with this one." */
 729         netif_stop_queue(net);
 730         if (hso_get_activity(odev->parent) == -EAGAIN) {
 731                 odev->skb_tx_buf = skb;
 732                 return 0;
 733         }
 734
 735         /* log if asked */
 736         DUMP1(skb->data, skb->len);
 737         /* Copy it from kernel memory to OUR memory */
 738         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 739         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 740
 741         /* Fill in the URB for shipping it out. */
 742         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 743                           odev->parent->usb,
 744                           usb_sndbulkpipe(odev->parent->usb,
 745                                           odev->out_endp->
 746                                           bEndpointAddress & 0x7F),
 747                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 748                           odev);
 749
 750         /* Deal with the Zero Length packet problem, I hope */
 751         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 752
 753         /* Send the URB on its merry way. */
 754         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 755         if (result) {
 756                 dev_warn(&odev->parent->interface->dev,
 757                         "failed mux_bulk_tx_urb %d", result);
 758                 net->stats.tx_errors++;
 759                 netif_start_queue(net);
 760         } else {
 761                 net->stats.tx_packets++;
 762                 net->stats.tx_bytes += skb->len;
 763                 /* And tell the kernel when the last transmit started. */
 764                 net->trans_start = jiffies;
 765         }
 766         dev_kfree_skb(skb);
 767         /* we're done */
 768         return result;
 769 }
 770
 771 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 772 {
 773         struct hso_net *odev = netdev_priv(net);
 774
 775         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 776         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 777         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 778 }
 779
 780 static struct ethtool_ops ops = {
 781         .get_drvinfo = hso_get_drvinfo,
 782         .get_link = ethtool_op_get_link
 783 };
 784
 785 /* called when a packet did not ack after watchdogtimeout */
 786 static void hso_net_tx_timeout(struct net_device *net)
 787 {
 788         struct hso_net *odev = netdev_priv(net);
 789
 790         if (!odev)
 791                 return;
 792
 793         /* Tell syslog we are hosed. */
 794         dev_warn(&net->dev, "Tx timed out.\n");
 795
 796         /* Tear the waiting frame off the list */
 797         if (odev->mux_bulk_tx_urb
 798             && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 799                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 800
 801         /* Update statistics */
 802         net->stats.tx_errors++;
 803 }
 804
 805 /* make a real packet from the received USB buffer */
 806 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 807                         unsigned int count, unsigned char is_eop)
 808 {
 809         unsigned short temp_bytes;
 810         unsigned short buffer_offset = 0;
 811         unsigned short frame_len;
 812         unsigned char *tmp_rx_buf;
 813
 814         /* log if needed */
 815         D1("Rx %d bytes", count);
 816         DUMP(ip_pkt, min(128, (int)count));
 817
 818         while (count) {
 819                 switch (odev->rx_parse_state) {
 820                 case WAIT_IP:
 821                         /* waiting for IP header. */
 822                         /* wanted bytes - size of ip header */
 823                         temp_bytes =
 824                             (count <
 825                              odev->rx_buf_missing) ? count : odev->
 826                             rx_buf_missing;
 827
 828                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 829                                odev->rx_buf_size, ip_pkt + buffer_offset,
 830                                temp_bytes);
 831
 832                         odev->rx_buf_size += temp_bytes;
 833                         buffer_offset += temp_bytes;
 834                         odev->rx_buf_missing -= temp_bytes;
 835                         count -= temp_bytes;
 836
 837                         if (!odev->rx_buf_missing) {
 838                                 /* header is complete allocate an sk_buffer and
 839                                  * continue to WAIT_DATA */
 840                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 841
 842                                 if ((frame_len > DEFAULT_MRU) ||
 843                                     (frame_len < sizeof(struct iphdr))) {
 844                                         dev_err(&odev->net->dev,
 845                                                 "Invalid frame (%d) length\n",
 846                                                 frame_len);
 847                                         odev->rx_parse_state = WAIT_SYNC;
 848                                         continue;
 849                                 }
 850                                 /* Allocate an sk_buff */
 851                                 odev->skb_rx_buf = dev_alloc_skb(frame_len);
 852                                 if (!odev->skb_rx_buf) {
 853                                         /* We got no receive buffer. */
 854                                         D1("could not allocate memory");
 855                                         odev->rx_parse_state = WAIT_SYNC;
 856                                         return;
 857                                 }
 858                                 /* Here's where it came from */
 859                                 odev->skb_rx_buf->dev = odev->net;
 860
 861                                 /* Copy what we got so far. make room for iphdr
 862                                  * after tail. */
 863                                 tmp_rx_buf =
 864                                     skb_put(odev->skb_rx_buf,
 865                                             sizeof(struct iphdr));
 866                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 867                                        sizeof(struct iphdr));
 868
 869                                 /* ETH_HLEN */
 870                                 odev->rx_buf_size = sizeof(struct iphdr);
 871
 872                                 /* Filip actually use .tot_len */
 873                                 odev->rx_buf_missing =
 874                                     frame_len - sizeof(struct iphdr);
 875                                 odev->rx_parse_state = WAIT_DATA;
 876                         }
 877                         break;
 878
 879                 case WAIT_DATA:
 880                         temp_bytes = (count < odev->rx_buf_missing)
 881                                         ? count : odev->rx_buf_missing;
 882
 883                         /* Copy the rest of the bytes that are left in the
 884                          * buffer into the waiting sk_buf. */
 885                         /* Make room for temp_bytes after tail. */
 886                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 887                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 888
 889                         odev->rx_buf_missing -= temp_bytes;
 890                         count -= temp_bytes;
 891                         buffer_offset += temp_bytes;
 892                         odev->rx_buf_size += temp_bytes;
 893                         if (!odev->rx_buf_missing) {
 894                                 /* Packet is complete. Inject into stack. */
 895                                 /* We have IP packet here */
 896                                 odev->skb_rx_buf->protocol =
 897                                                 __constant_htons(ETH_P_IP);
 898                                 /* don't check it */
 899                                 odev->skb_rx_buf->ip_summed =
 900                                         CHECKSUM_UNNECESSARY;
 901
 902                                 skb_reset_mac_header(odev->skb_rx_buf);
 903
 904                                 /* Ship it off to the kernel */
 905                                 netif_rx(odev->skb_rx_buf);
 906                                 /* No longer our buffer. */
 907                                 odev->skb_rx_buf = NULL;
 908
 909                                 /* update out statistics */
 910                                 odev->net->stats.rx_packets++;
 911
 912                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 913
 914                                 odev->rx_buf_size = 0;
 915                                 odev->rx_buf_missing = sizeof(struct iphdr);
 916                                 odev->rx_parse_state = WAIT_IP;
 917                         }
 918                         break;
 919
 920                 case WAIT_SYNC:
 921                         D1(" W_S");
 922                         count = 0;
 923                         break;
 924                 default:
 925                         D1(" ");
 926                         count--;
 927                         break;
 928                 }
 929         }
 930
 931         /* Recovery mechanism for WAIT_SYNC state. */
 932         if (is_eop) {
 933                 if (odev->rx_parse_state == WAIT_SYNC) {
 934                         odev->rx_parse_state = WAIT_IP;
 935                         odev->rx_buf_size = 0;
 936                         odev->rx_buf_missing = sizeof(struct iphdr);
 937                 }
 938         }
 939 }
 940
 941 /* Moving data from usb to kernel (in interrupt state) */
 942 static void read_bulk_callback(struct urb *urb)
 943 {
 944         struct hso_net *odev = urb->context;
 945         struct net_device *net;
 946         int result;
 947         int status = urb->status;
 948
 949         /* is al ok?  (Filip: Who's Al ?) */
 950         if (status) {
 951                 log_usb_status(status, __func__);
 952                 return;
 953         }
 954
 955         /* Sanity check */
 956         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 957                 D1("BULK IN callback but driver is not active!");
 958                 return;
 959         }
 960         usb_mark_last_busy(urb->dev);
 961
 962         net = odev->net;
 963
 964         if (!netif_device_present(net)) {
 965                 /* Somebody killed our network interface... */
 966                 return;
 967         }
 968
 969         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
 970                 u32 rest;
 971                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
 972                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
 973                 if (((rest == 5) || (rest == 6))
 974                     && !memcmp(((u8 *) urb->transfer_buffer) +
 975                                urb->actual_length - 4, crc_check, 4)) {
 976                         urb->actual_length -= 4;
 977                 }
 978         }
 979
 980         /* do we even have a packet? */
 981         if (urb->actual_length) {
 982                 /* Handle the IP stream, add header and push it onto network
 983                  * stack if the packet is complete. */
 984                 spin_lock(&odev->net_lock);
 985                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
 986                             (urb->transfer_buffer_length >
 987                              urb->actual_length) ? 1 : 0);
 988                 spin_unlock(&odev->net_lock);
 989         }
 990
 991         /* We are done with this URB, resubmit it. Prep the USB to wait for
 992          * another frame. Reuse same as received. */
 993         usb_fill_bulk_urb(urb,
 994                           odev->parent->usb,
 995                           usb_rcvbulkpipe(odev->parent->usb,
 996                                           odev->in_endp->
 997                                           bEndpointAddress & 0x7F),
 998                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
 999                           read_bulk_callback, odev);
1000
1001         /* Give this to the USB subsystem so it can tell us when more data
1002          * arrives. */
1003         result = usb_submit_urb(urb, GFP_ATOMIC);
1004         if (result)
1005                 dev_warn(&odev->parent->interface->dev,
1006                          "%s failed submit mux_bulk_rx_urb %d", __func__,
1007                          result);
1008 }
1009
1010 /* Serial driver functions */
1011
1012 static void _hso_serial_set_termios(struct tty_struct *tty,
1013                                     struct ktermios *old)
1014 {
1015         struct hso_serial *serial = get_serial_by_tty(tty);
1016         struct ktermios *termios;
1017
1018         if (!serial) {
1019                 printk(KERN_ERR "%s: no tty structures", __func__);
1020                 return;
1021         }
1022
1023         D4("port %d", serial->minor);
1024
1025         /*
1026          * The default requirements for this device are:
1027          */
1028         termios = tty->termios;
1029         termios->c_iflag &=
1030                 ~(IGNBRK        /* disable ignore break */
1031                 | BRKINT        /* disable break causes interrupt */
1032                 | PARMRK        /* disable mark parity errors */
1033                 | ISTRIP        /* disable clear high bit of input characters */
1034                 | INLCR         /* disable translate NL to CR */
1035                 | IGNCR         /* disable ignore CR */
1036                 | ICRNL         /* disable translate CR to NL */
1037                 | IXON);        /* disable enable XON/XOFF flow control */
1038
1039         /* disable postprocess output characters */
1040         termios->c_oflag &= ~OPOST;
1041
1042         termios->c_lflag &=
1043                 ~(ECHO          /* disable echo input characters */
1044                 | ECHONL        /* disable echo new line */
1045                 | ICANON        /* disable erase, kill, werase, and rprnt
1046                                    special characters */
1047                 | ISIG          /* disable interrupt, quit, and suspend special
1048                                    characters */
1049                 | IEXTEN);      /* disable non-POSIX special characters */
1050
1051         termios->c_cflag &=
1052                 ~(CSIZE         /* no size */
1053                 | PARENB        /* disable parity bit */
1054                 | CBAUD         /* clear current baud rate */
1055                 | CBAUDEX);     /* clear current buad rate */
1056
1057         termios->c_cflag |= CS8;        /* character size 8 bits */
1058
1059         /* baud rate 115200 */
1060         tty_encode_baud_rate(tty, 115200, 115200);
1061
1062         /*
1063          * Force low_latency on; otherwise the pushes are scheduled;
1064          * this is bad as it opens up the possibility of dropping bytes
1065          * on the floor.  We don't want to drop bytes on the floor. :)
1066          */
1067         tty->low_latency = 1;
1068         return;
1069 }
1070
1071 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1072 {
1073         int result;
1074 #ifdef CONFIG_HSO_AUTOPM
1075         usb_mark_last_busy(urb->dev);
1076 #endif
1077         /* We are done with this URB, resubmit it. Prep the USB to wait for
1078          * another frame */
1079         usb_fill_bulk_urb(urb, serial->parent->usb,
1080                           usb_rcvbulkpipe(serial->parent->usb,
1081                                           serial->in_endp->
1082                                           bEndpointAddress & 0x7F),
1083                           urb->transfer_buffer, serial->rx_data_length,
1084                           hso_std_serial_read_bulk_callback, serial);
1085         /* Give this to the USB subsystem so it can tell us when more data
1086          * arrives. */
1087         result = usb_submit_urb(urb, GFP_ATOMIC);
1088         if (result) {
1089                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1090                         __func__, result);
1091         }
1092 }
1093
1094
1095
1096
1097 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1098 {
1099         int count;
1100         struct urb *curr_urb;
1101
1102         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1103                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1104                 count = put_rxbuf_data(curr_urb, serial);
1105                 if (count == -1)
1106                         return;
1107                 if (count == 0) {
1108                         serial->curr_rx_urb_idx++;
1109                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1110                                 serial->curr_rx_urb_idx = 0;
1111                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1112                 }
1113         }
1114 }
1115
1116 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1117 {
1118         int count = 0;
1119         struct urb *urb;
1120
1121         urb = serial->rx_urb[0];
1122         if (serial->open_count > 0) {
1123                 count = put_rxbuf_data(urb, serial);
1124                 if (count == -1)
1125                         return;
1126         }
1127         /* Re issue a read as long as we receive data. */
1128
1129         if (count == 0 && ((urb->actual_length != 0) ||
1130                            (serial->rx_state == RX_PENDING))) {
1131                 serial->rx_state = RX_SENT;
1132                 hso_mux_serial_read(serial);
1133         } else
1134                 serial->rx_state = RX_IDLE;
1135 }
1136
1137
1138 /* read callback for Diag and CS port */
1139 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1140 {
1141         struct hso_serial *serial = urb->context;
1142         int status = urb->status;
1143
1144         /* sanity check */
1145         if (!serial) {
1146                 D1("serial == NULL");
1147                 return;
1148         } else if (status) {
1149                 log_usb_status(status, __func__);
1150                 return;
1151         }
1152
1153         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1154         D1("Actual length = %d\n", urb->actual_length);
1155         DUMP1(urb->transfer_buffer, urb->actual_length);
1156
1157         /* Anyone listening? */
1158         if (serial->open_count == 0)
1159                 return;
1160
1161         if (status == 0) {
1162                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1163                         u32 rest;
1164                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1165                         rest =
1166                             urb->actual_length %
1167                             serial->in_endp->wMaxPacketSize;
1168                         if (((rest == 5) || (rest == 6))
1169                             && !memcmp(((u8 *) urb->transfer_buffer) +
1170                                        urb->actual_length - 4, crc_check, 4)) {
1171                                 urb->actual_length -= 4;
1172                         }
1173                 }
1174                 /* Valid data, handle RX data */
1175                 spin_lock(&serial->serial_lock);
1176                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1177                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1178                 spin_unlock(&serial->serial_lock);
1179         } else if (status == -ENOENT || status == -ECONNRESET) {
1180                 /* Unlinked - check for throttled port. */
1181                 D2("Port %d, successfully unlinked urb", serial->minor);
1182                 spin_lock(&serial->serial_lock);
1183                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1184                 hso_resubmit_rx_bulk_urb(serial, urb);
1185                 spin_unlock(&serial->serial_lock);
1186         } else {
1187                 D2("Port %d, status = %d for read urb", serial->minor, status);
1188                 return;
1189         }
1190 }
1191
1192 /*
1193  * This needs to be a tasklet otherwise we will
1194  * end up recursively calling this function.
1195  */
1196 void hso_unthrottle_tasklet(struct hso_serial *serial)
1197 {
1198         unsigned long flags;
1199
1200         spin_lock_irqsave(&serial->serial_lock, flags);
1201         if ((serial->parent->port_spec & HSO_INTF_MUX))
1202                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1203         else
1204                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1205         spin_unlock_irqrestore(&serial->serial_lock, flags);
1206 }
1207
1208 static  void hso_unthrottle(struct tty_struct *tty)
1209 {
1210         struct hso_serial *serial = get_serial_by_tty(tty);
1211
1212         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1213 }
1214
1215 void hso_unthrottle_workfunc(struct work_struct *work)
1216 {
1217         struct hso_serial *serial =
1218             container_of(work, struct hso_serial,
1219                          retry_unthrottle_workqueue);
1220         hso_unthrottle_tasklet(serial);
1221 }
1222
1223 /* open the requested serial port */
1224 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1225 {
1226         struct hso_serial *serial = get_serial_by_index(tty->index);
1227         int result;
1228
1229         /* sanity check */
1230         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1231                 WARN_ON(1);
1232                 tty->driver_data = NULL;
1233                 D1("Failed to open port");
1234                 return -ENODEV;
1235         }
1236
1237         mutex_lock(&serial->parent->mutex);
1238         result = usb_autopm_get_interface(serial->parent->interface);
1239         if (result < 0)
1240                 goto err_out;
1241
1242         D1("Opening %d", serial->minor);
1243         kref_get(&serial->parent->ref);
1244
1245         /* setup */
1246         spin_lock_irq(&serial->serial_lock);
1247         tty->driver_data = serial;
1248         serial->tty = tty_kref_get(tty);
1249         spin_unlock_irq(&serial->serial_lock);
1250
1251         /* check for port already opened, if not set the termios */
1252         serial->open_count++;
1253         if (serial->open_count == 1) {
1254                 tty->low_latency = 1;
1255                 serial->rx_state = RX_IDLE;
1256                 /* Force default termio settings */
1257                 _hso_serial_set_termios(tty, NULL);
1258                 tasklet_init(&serial->unthrottle_tasklet,
1259                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1260                              (unsigned long)serial);
1261                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1262                           hso_unthrottle_workfunc);
1263                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1264                 if (result) {
1265                         hso_stop_serial_device(serial->parent);
1266                         serial->open_count--;
1267                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1268                 }
1269         } else {
1270                 D1("Port was already open");
1271         }
1272
1273         usb_autopm_put_interface(serial->parent->interface);
1274
1275         /* done */
1276         if (result)
1277                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1278 err_out:
1279         mutex_unlock(&serial->parent->mutex);
1280         return result;
1281 }
1282
1283 /* close the requested serial port */
1284 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1285 {
1286         struct hso_serial *serial = tty->driver_data;
1287         u8 usb_gone;
1288
1289         D1("Closing serial port");
1290
1291         /* Open failed, no close cleanup required */
1292         if (serial == NULL)
1293                 return;
1294
1295         mutex_lock(&serial->parent->mutex);
1296         usb_gone = serial->parent->usb_gone;
1297
1298         if (!usb_gone)
1299                 usb_autopm_get_interface(serial->parent->interface);
1300
1301         /* reset the rts and dtr */
1302         /* do the actual close */
1303         serial->open_count--;
1304         kref_put(&serial->parent->ref, hso_serial_ref_free);
1305         if (serial->open_count <= 0) {
1306                 serial->open_count = 0;
1307                 spin_lock_irq(&serial->serial_lock);
1308                 if (serial->tty == tty) {
1309                         serial->tty->driver_data = NULL;
1310                         serial->tty = NULL;
1311                         tty_kref_put(tty);
1312                 }
1313                 spin_unlock_irq(&serial->serial_lock);
1314                 if (!usb_gone)
1315                         hso_stop_serial_device(serial->parent);
1316                 tasklet_kill(&serial->unthrottle_tasklet);
1317                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1318         }
1319
1320         if (!usb_gone)
1321                 usb_autopm_put_interface(serial->parent->interface);
1322
1323         mutex_unlock(&serial->parent->mutex);
1324 }
1325
1326 /* close the requested serial port */
1327 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1328                             int count)
1329 {
1330         struct hso_serial *serial = get_serial_by_tty(tty);
1331         int space, tx_bytes;
1332         unsigned long flags;
1333
1334         /* sanity check */
1335         if (serial == NULL) {
1336                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1337                 return -ENODEV;
1338         }
1339
1340         spin_lock_irqsave(&serial->serial_lock, flags);
1341
1342         space = serial->tx_data_length - serial->tx_buffer_count;
1343         tx_bytes = (count < space) ? count : space;
1344
1345         if (!tx_bytes)
1346                 goto out;
1347
1348         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1349         serial->tx_buffer_count += tx_bytes;
1350
1351 out:
1352         spin_unlock_irqrestore(&serial->serial_lock, flags);
1353
1354         hso_kick_transmit(serial);
1355         /* done */
1356         return tx_bytes;
1357 }
1358
1359 /* how much room is there for writing */
1360 static int hso_serial_write_room(struct tty_struct *tty)
1361 {
1362         struct hso_serial *serial = get_serial_by_tty(tty);
1363         int room;
1364         unsigned long flags;
1365
1366         spin_lock_irqsave(&serial->serial_lock, flags);
1367         room = serial->tx_data_length - serial->tx_buffer_count;
1368         spin_unlock_irqrestore(&serial->serial_lock, flags);
1369
1370         /* return free room */
1371         return room;
1372 }
1373
1374 /* setup the term */
1375 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1376 {
1377         struct hso_serial *serial = get_serial_by_tty(tty);
1378         unsigned long flags;
1379
1380         if (old)
1381                 D5("Termios called with: cflags new[%d] - old[%d]",
1382                    tty->termios->c_cflag, old->c_cflag);
1383
1384         /* the actual setup */
1385         spin_lock_irqsave(&serial->serial_lock, flags);
1386         if (serial->open_count)
1387                 _hso_serial_set_termios(tty, old);
1388         else
1389                 tty->termios = old;
1390         spin_unlock_irqrestore(&serial->serial_lock, flags);
1391
1392         /* done */
1393         return;
1394 }
1395
1396 /* how many characters in the buffer */
1397 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1398 {
1399         struct hso_serial *serial = get_serial_by_tty(tty);
1400         int chars;
1401         unsigned long flags;
1402
1403         /* sanity check */
1404         if (serial == NULL)
1405                 return 0;
1406
1407         spin_lock_irqsave(&serial->serial_lock, flags);
1408         chars = serial->tx_buffer_count;
1409         spin_unlock_irqrestore(&serial->serial_lock, flags);
1410
1411         return chars;
1412 }
1413
1414 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1415 {
1416         unsigned int value;
1417         struct hso_serial *serial = get_serial_by_tty(tty);
1418         unsigned long flags;
1419
1420         /* sanity check */
1421         if (!serial) {
1422                 D1("no tty structures");
1423                 return -EINVAL;
1424         }
1425
1426         spin_lock_irqsave(&serial->serial_lock, flags);
1427         value = ((serial->rts_state) ? TIOCM_RTS : 0) |
1428             ((serial->dtr_state) ? TIOCM_DTR : 0);
1429         spin_unlock_irqrestore(&serial->serial_lock, flags);
1430
1431         return value;
1432 }
1433
1434 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1435                                unsigned int set, unsigned int clear)
1436 {
1437         int val = 0;
1438         unsigned long flags;
1439         int if_num;
1440         struct hso_serial *serial = get_serial_by_tty(tty);
1441
1442         /* sanity check */
1443         if (!serial) {
1444                 D1("no tty structures");
1445                 return -EINVAL;
1446         }
1447         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1448
1449         spin_lock_irqsave(&serial->serial_lock, flags);
1450         if (set & TIOCM_RTS)
1451                 serial->rts_state = 1;
1452         if (set & TIOCM_DTR)
1453                 serial->dtr_state = 1;
1454
1455         if (clear & TIOCM_RTS)
1456                 serial->rts_state = 0;
1457         if (clear & TIOCM_DTR)
1458                 serial->dtr_state = 0;
1459
1460         if (serial->dtr_state)
1461                 val |= 0x01;
1462         if (serial->rts_state)
1463                 val |= 0x02;
1464
1465         spin_unlock_irqrestore(&serial->serial_lock, flags);
1466
1467         return usb_control_msg(serial->parent->usb,
1468                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1469                                0x21, val, if_num, NULL, 0,
1470                                USB_CTRL_SET_TIMEOUT);
1471 }
1472
1473 /* starts a transmit */
1474 static void hso_kick_transmit(struct hso_serial *serial)
1475 {
1476         u8 *temp;
1477         unsigned long flags;
1478         int res;
1479
1480         spin_lock_irqsave(&serial->serial_lock, flags);
1481         if (!serial->tx_buffer_count)
1482                 goto out;
1483
1484         if (serial->tx_urb_used)
1485                 goto out;
1486
1487         /* Wakeup USB interface if necessary */
1488         if (hso_get_activity(serial->parent) == -EAGAIN)
1489                 goto out;
1490
1491         /* Switch pointers around to avoid memcpy */
1492         temp = serial->tx_buffer;
1493         serial->tx_buffer = serial->tx_data;
1494         serial->tx_data = temp;
1495         serial->tx_data_count = serial->tx_buffer_count;
1496         serial->tx_buffer_count = 0;
1497
1498         /* If temp is set, it means we switched buffers */
1499         if (temp && serial->write_data) {
1500                 res = serial->write_data(serial);
1501                 if (res >= 0)
1502                         serial->tx_urb_used = 1;
1503         }
1504 out:
1505         spin_unlock_irqrestore(&serial->serial_lock, flags);
1506 }
1507
1508 /* make a request (for reading and writing data to muxed serial port) */
1509 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1510                               struct urb *ctrl_urb,
1511                               struct usb_ctrlrequest *ctrl_req,
1512                               u8 *ctrl_urb_data, u32 size)
1513 {
1514         int result;
1515         int pipe;
1516
1517         /* Sanity check */
1518         if (!serial || !ctrl_urb || !ctrl_req) {
1519                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1520                 return -EINVAL;
1521         }
1522
1523         /* initialize */
1524         ctrl_req->wValue = 0;
1525         ctrl_req->wIndex = hso_port_to_mux(port);
1526         ctrl_req->wLength = size;
1527
1528         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1529                 /* Reading command */
1530                 ctrl_req->bRequestType = USB_DIR_IN |
1531                                          USB_TYPE_OPTION_VENDOR |
1532                                          USB_RECIP_INTERFACE;
1533                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1534                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1535         } else {
1536                 /* Writing command */
1537                 ctrl_req->bRequestType = USB_DIR_OUT |
1538                                          USB_TYPE_OPTION_VENDOR |
1539                                          USB_RECIP_INTERFACE;
1540                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1541                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1542         }
1543         /* syslog */
1544         D2("%s command (%02x) len: %d, port: %d",
1545            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1546            ctrl_req->bRequestType, ctrl_req->wLength, port);
1547
1548         /* Load ctrl urb */
1549         ctrl_urb->transfer_flags = 0;
1550         usb_fill_control_urb(ctrl_urb,
1551                              serial->parent->usb,
1552                              pipe,
1553                              (u8 *) ctrl_req,
1554                              ctrl_urb_data, size, ctrl_callback, serial);
1555         /* Send it on merry way */
1556         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1557         if (result) {
1558                 dev_err(&ctrl_urb->dev->dev,
1559                         "%s failed submit ctrl_urb %d type %d", __func__,
1560                         result, type);
1561                 return result;
1562         }
1563
1564         /* done */
1565         return size;
1566 }
1567
1568 /* called by intr_callback when read occurs */
1569 static int hso_mux_serial_read(struct hso_serial *serial)
1570 {
1571         if (!serial)
1572                 return -EINVAL;
1573
1574         /* clean data */
1575         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1576         /* make the request */
1577
1578         if (serial->num_rx_urbs != 1) {
1579                 dev_err(&serial->parent->interface->dev,
1580                         "ERROR: mux'd reads with multiple buffers "
1581                         "not possible\n");
1582                 return 0;
1583         }
1584         return mux_device_request(serial,
1585                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1586                                   serial->parent->port_spec & HSO_PORT_MASK,
1587                                   serial->rx_urb[0],
1588                                   &serial->ctrl_req_rx,
1589                                   serial->rx_data[0], serial->rx_data_length);
1590 }
1591
1592 /* used for muxed serial port callback (muxed serial read) */
1593 static void intr_callback(struct urb *urb)
1594 {
1595         struct hso_shared_int *shared_int = urb->context;
1596         struct hso_serial *serial;
1597         unsigned char *port_req;
1598         int status = urb->status;
1599         int i;
1600
1601         usb_mark_last_busy(urb->dev);
1602
1603         /* sanity check */
1604         if (!shared_int)
1605                 return;
1606
1607         /* status check */
1608         if (status) {
1609                 log_usb_status(status, __func__);
1610                 return;
1611         }
1612         D4("\n--- Got intr callback 0x%02X ---", status);
1613
1614         /* what request? */
1615         port_req = urb->transfer_buffer;
1616         D4(" port_req = 0x%.2X\n", *port_req);
1617         /* loop over all muxed ports to find the one sending this */
1618         for (i = 0; i < 8; i++) {
1619                 /* max 8 channels on MUX */
1620                 if (*port_req & (1 << i)) {
1621                         serial = get_serial_by_shared_int_and_type(shared_int,
1622                                                                    (1 << i));
1623                         if (serial != NULL) {
1624                                 D1("Pending read interrupt on port %d\n", i);
1625                                 spin_lock(&serial->serial_lock);
1626                                 if (serial->rx_state == RX_IDLE) {
1627                                         /* Setup and send a ctrl req read on
1628                                          * port i */
1629                                 if (!serial->rx_urb_filled[0]) {
1630                                                 serial->rx_state = RX_SENT;
1631                                                 hso_mux_serial_read(serial);
1632                                         } else
1633                                                 serial->rx_state = RX_PENDING;
1634
1635                                 } else {
1636                                         D1("Already pending a read on "
1637                                            "port %d\n", i);
1638                                 }
1639                                 spin_unlock(&serial->serial_lock);
1640                         }
1641                 }
1642         }
1643         /* Resubmit interrupt urb */
1644         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1645 }
1646
1647 /* called for writing to muxed serial port */
1648 static int hso_mux_serial_write_data(struct hso_serial *serial)
1649 {
1650         if (NULL == serial)
1651                 return -EINVAL;
1652
1653         return mux_device_request(serial,
1654                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1655                                   serial->parent->port_spec & HSO_PORT_MASK,
1656                                   serial->tx_urb,
1657                                   &serial->ctrl_req_tx,
1658                                   serial->tx_data, serial->tx_data_count);
1659 }
1660
1661 /* write callback for Diag and CS port */
1662 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1663 {
1664         struct hso_serial *serial = urb->context;
1665         int status = urb->status;
1666         struct tty_struct *tty;
1667
1668         /* sanity check */
1669         if (!serial) {
1670                 D1("serial == NULL");
1671                 return;
1672         }
1673
1674         spin_lock(&serial->serial_lock);
1675         serial->tx_urb_used = 0;
1676         tty = tty_kref_get(serial->tty);
1677         spin_unlock(&serial->serial_lock);
1678         if (status) {
1679                 log_usb_status(status, __func__);
1680                 tty_kref_put(tty);
1681                 return;
1682         }
1683         hso_put_activity(serial->parent);
1684         if (tty) {
1685                 tty_wakeup(tty);
1686                 tty_kref_put(tty);
1687         }
1688         hso_kick_transmit(serial);
1689
1690         D1(" ");
1691         return;
1692 }
1693
1694 /* called for writing diag or CS serial port */
1695 static int hso_std_serial_write_data(struct hso_serial *serial)
1696 {
1697         int count = serial->tx_data_count;
1698         int result;
1699
1700         usb_fill_bulk_urb(serial->tx_urb,
1701                           serial->parent->usb,
1702                           usb_sndbulkpipe(serial->parent->usb,
1703                                           serial->out_endp->
1704                                           bEndpointAddress & 0x7F),
1705                           serial->tx_data, serial->tx_data_count,
1706                           hso_std_serial_write_bulk_callback, serial);
1707
1708         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1709         if (result) {
1710                 dev_warn(&serial->parent->usb->dev,
1711                          "Failed to submit urb - res %d\n", result);
1712                 return result;
1713         }
1714
1715         return count;
1716 }
1717
1718 /* callback after read or write on muxed serial port */
1719 static void ctrl_callback(struct urb *urb)
1720 {
1721         struct hso_serial *serial = urb->context;
1722         struct usb_ctrlrequest *req;
1723         int status = urb->status;
1724         struct tty_struct *tty;
1725
1726         /* sanity check */
1727         if (!serial)
1728                 return;
1729
1730         spin_lock(&serial->serial_lock);
1731         serial->tx_urb_used = 0;
1732         tty = tty_kref_get(serial->tty);
1733         spin_unlock(&serial->serial_lock);
1734         if (status) {
1735                 log_usb_status(status, __func__);
1736                 tty_kref_put(tty);
1737                 return;
1738         }
1739
1740         /* what request? */
1741         req = (struct usb_ctrlrequest *)(urb->setup_packet);
1742         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1743         D4("Actual length of urb = %d\n", urb->actual_length);
1744         DUMP1(urb->transfer_buffer, urb->actual_length);
1745
1746         if (req->bRequestType ==
1747             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1748                 /* response to a read command */
1749                 serial->rx_urb_filled[0] = 1;
1750                 spin_lock(&serial->serial_lock);
1751                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1752                 spin_unlock(&serial->serial_lock);
1753         } else {
1754                 hso_put_activity(serial->parent);
1755                 if (tty)
1756                         tty_wakeup(tty);
1757                 /* response to a write command */
1758                 hso_kick_transmit(serial);
1759         }
1760         tty_kref_put(tty);
1761 }
1762
1763 /* handle RX data for serial port */
1764 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
1765 {
1766         struct tty_struct *tty;
1767         int write_length_remaining = 0;
1768         int curr_write_len;
1769
1770         /* Sanity check */
1771         if (urb == NULL || serial == NULL) {
1772                 D1("serial = NULL");
1773                 return -2;
1774         }
1775
1776         spin_lock(&serial->serial_lock);
1777         tty = tty_kref_get(serial->tty);
1778         spin_unlock(&serial->serial_lock);
1779
1780         /* Push data to tty */
1781         if (tty) {
1782                 write_length_remaining = urb->actual_length -
1783                         serial->curr_rx_urb_offset;
1784                 D1("data to push to tty");
1785                 while (write_length_remaining) {
1786                         if (test_bit(TTY_THROTTLED, &tty->flags))
1787                                 return -1;
1788                         curr_write_len =  tty_insert_flip_string
1789                                 (tty, urb->transfer_buffer +
1790                                  serial->curr_rx_urb_offset,
1791                                  write_length_remaining);
1792                         serial->curr_rx_urb_offset += curr_write_len;
1793                         write_length_remaining -= curr_write_len;
1794                         tty_flip_buffer_push(tty);
1795                 }
1796         }
1797         if (write_length_remaining == 0) {
1798                 serial->curr_rx_urb_offset = 0;
1799                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1800         }
1801         tty_kref_put(tty);
1802         return write_length_remaining;
1803 }
1804
1805
1806 /* Base driver functions */
1807
1808 static void hso_log_port(struct hso_device *hso_dev)
1809 {
1810         char *port_type;
1811         char port_dev[20];
1812
1813         switch (hso_dev->port_spec & HSO_PORT_MASK) {
1814         case HSO_PORT_CONTROL:
1815                 port_type = "Control";
1816                 break;
1817         case HSO_PORT_APP:
1818                 port_type = "Application";
1819                 break;
1820         case HSO_PORT_GPS:
1821                 port_type = "GPS";
1822                 break;
1823         case HSO_PORT_GPS_CONTROL:
1824                 port_type = "GPS control";
1825                 break;
1826         case HSO_PORT_APP2:
1827                 port_type = "Application2";
1828                 break;
1829         case HSO_PORT_PCSC:
1830                 port_type = "PCSC";
1831                 break;
1832         case HSO_PORT_DIAG:
1833                 port_type = "Diagnostic";
1834                 break;
1835         case HSO_PORT_DIAG2:
1836                 port_type = "Diagnostic2";
1837                 break;
1838         case HSO_PORT_MODEM:
1839                 port_type = "Modem";
1840                 break;
1841         case HSO_PORT_NETWORK:
1842                 port_type = "Network";
1843                 break;
1844         default:
1845                 port_type = "Unknown";
1846                 break;
1847         }
1848         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
1849                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
1850         } else
1851                 sprintf(port_dev, "/dev/%s%d", tty_filename,
1852                         dev2ser(hso_dev)->minor);
1853
1854         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
1855                 port_type, port_dev);
1856 }
1857
1858 static int hso_start_net_device(struct hso_device *hso_dev)
1859 {
1860         int i, result = 0;
1861         struct hso_net *hso_net = dev2net(hso_dev);
1862
1863         if (!hso_net)
1864                 return -ENODEV;
1865
1866         /* send URBs for all read buffers */
1867         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1868
1869                 /* Prep a receive URB */
1870                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
1871                                   hso_dev->usb,
1872                                   usb_rcvbulkpipe(hso_dev->usb,
1873                                                   hso_net->in_endp->
1874                                                   bEndpointAddress & 0x7F),
1875                                   hso_net->mux_bulk_rx_buf_pool[i],
1876                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
1877                                   hso_net);
1878
1879                 /* Put it out there so the device can send us stuff */
1880                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
1881                                         GFP_NOIO);
1882                 if (result)
1883                         dev_warn(&hso_dev->usb->dev,
1884                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
1885                                 i, result);
1886         }
1887
1888         return result;
1889 }
1890
1891 static int hso_stop_net_device(struct hso_device *hso_dev)
1892 {
1893         int i;
1894         struct hso_net *hso_net = dev2net(hso_dev);
1895
1896         if (!hso_net)
1897                 return -ENODEV;
1898
1899         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1900                 if (hso_net->mux_bulk_rx_urb_pool[i])
1901                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1902
1903         }
1904         if (hso_net->mux_bulk_tx_urb)
1905                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
1906
1907         return 0;
1908 }
1909
1910 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
1911 {
1912         int i, result = 0;
1913         struct hso_serial *serial = dev2ser(hso_dev);
1914
1915         if (!serial)
1916                 return -ENODEV;
1917
1918         /* If it is not the MUX port fill in and submit a bulk urb (already
1919          * allocated in hso_serial_start) */
1920         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
1921                 for (i = 0; i < serial->num_rx_urbs; i++) {
1922                         usb_fill_bulk_urb(serial->rx_urb[i],
1923                                           serial->parent->usb,
1924                                           usb_rcvbulkpipe(serial->parent->usb,
1925                                                           serial->in_endp->
1926                                                           bEndpointAddress &
1927                                                           0x7F),
1928                                           serial->rx_data[i],
1929                                           serial->rx_data_length,
1930                                           hso_std_serial_read_bulk_callback,
1931                                           serial);
1932                         result = usb_submit_urb(serial->rx_urb[i], flags);
1933                         if (result) {
1934                                 dev_warn(&serial->parent->usb->dev,
1935                                          "Failed to submit urb - res %d\n",
1936                                          result);
1937                                 break;
1938                         }
1939                 }
1940         } else {
1941                 mutex_lock(&serial->shared_int->shared_int_lock);
1942                 if (!serial->shared_int->use_count) {
1943                         result =
1944                             hso_mux_submit_intr_urb(serial->shared_int,
1945                                                     hso_dev->usb, flags);
1946                 }
1947                 serial->shared_int->use_count++;
1948                 mutex_unlock(&serial->shared_int->shared_int_lock);
1949         }
1950
1951         return result;
1952 }
1953
1954 static int hso_stop_serial_device(struct hso_device *hso_dev)
1955 {
1956         int i;
1957         struct hso_serial *serial = dev2ser(hso_dev);
1958
1959         if (!serial)
1960                 return -ENODEV;
1961
1962         for (i = 0; i < serial->num_rx_urbs; i++) {
1963                 if (serial->rx_urb[i]) {
1964                                 usb_kill_urb(serial->rx_urb[i]);
1965                                 serial->rx_urb_filled[i] = 0;
1966                 }
1967         }
1968         serial->curr_rx_urb_idx = 0;
1969         serial->curr_rx_urb_offset = 0;
1970
1971         if (serial->tx_urb)
1972                 usb_kill_urb(serial->tx_urb);
1973
1974         if (serial->shared_int) {
1975                 mutex_lock(&serial->shared_int->shared_int_lock);
1976                 if (serial->shared_int->use_count &&
1977                     (--serial->shared_int->use_count == 0)) {
1978                         struct urb *urb;
1979
1980                         urb = serial->shared_int->shared_intr_urb;
1981                         if (urb)
1982                                 usb_kill_urb(urb);
1983                 }
1984                 mutex_unlock(&serial->shared_int->shared_int_lock);
1985         }
1986
1987         return 0;
1988 }
1989
1990 static void hso_serial_common_free(struct hso_serial *serial)
1991 {
1992         int i;
1993
1994         if (serial->parent->dev)
1995                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
1996
1997         tty_unregister_device(tty_drv, serial->minor);
1998
1999         for (i = 0; i < serial->num_rx_urbs; i++) {
2000                 /* unlink and free RX URB */
2001                 usb_free_urb(serial->rx_urb[i]);
2002                 /* free the RX buffer */
2003                 kfree(serial->rx_data[i]);
2004         }
2005
2006         /* unlink and free TX URB */
2007         usb_free_urb(serial->tx_urb);
2008         kfree(serial->tx_data);
2009 }
2010
2011 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2012                                     int rx_size, int tx_size)
2013 {
2014         struct device *dev;
2015         int minor;
2016         int i;
2017
2018         minor = get_free_serial_index();
2019         if (minor < 0)
2020                 goto exit;
2021
2022         /* register our minor number */
2023         serial->parent->dev = tty_register_device(tty_drv, minor,
2024                                         &serial->parent->interface->dev);
2025         dev = serial->parent->dev;
2026         dev->driver_data = serial->parent;
2027         i = device_create_file(dev, &dev_attr_hsotype);
2028
2029         /* fill in specific data for later use */
2030         serial->minor = minor;
2031         serial->magic = HSO_SERIAL_MAGIC;
2032         spin_lock_init(&serial->serial_lock);
2033         serial->num_rx_urbs = num_urbs;
2034
2035         /* RX, allocate urb and initialize */
2036
2037         /* prepare our RX buffer */
2038         serial->rx_data_length = rx_size;
2039         for (i = 0; i < serial->num_rx_urbs; i++) {
2040                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2041                 if (!serial->rx_urb[i]) {
2042                         dev_err(dev, "Could not allocate urb?\n");
2043                         goto exit;
2044                 }
2045                 serial->rx_urb[i]->transfer_buffer = NULL;
2046                 serial->rx_urb[i]->transfer_buffer_length = 0;
2047                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2048                                              GFP_KERNEL);
2049                 if (!serial->rx_data[i]) {
2050                         dev_err(dev, "%s - Out of memory\n", __func__);
2051                         goto exit;
2052                 }
2053         }
2054
2055         /* TX, allocate urb and initialize */
2056         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2057         if (!serial->tx_urb) {
2058                 dev_err(dev, "Could not allocate urb?\n");
2059                 goto exit;
2060         }
2061         serial->tx_urb->transfer_buffer = NULL;
2062         serial->tx_urb->transfer_buffer_length = 0;
2063         /* prepare our TX buffer */
2064         serial->tx_data_count = 0;
2065         serial->tx_buffer_count = 0;
2066         serial->tx_data_length = tx_size;
2067         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2068         if (!serial->tx_data) {
2069                 dev_err(dev, "%s - Out of memory", __func__);
2070                 goto exit;
2071         }
2072         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2073         if (!serial->tx_buffer) {
2074                 dev_err(dev, "%s - Out of memory", __func__);
2075                 goto exit;
2076         }
2077
2078         return 0;
2079 exit:
2080         hso_serial_common_free(serial);
2081         return -1;
2082 }
2083
2084 /* Frees a general hso device */
2085 static void hso_free_device(struct hso_device *hso_dev)
2086 {
2087         kfree(hso_dev);
2088 }
2089
2090 /* Creates a general hso device */
2091 static struct hso_device *hso_create_device(struct usb_interface *intf,
2092                                             int port_spec)
2093 {
2094         struct hso_device *hso_dev;
2095
2096         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2097         if (!hso_dev)
2098                 return NULL;
2099
2100         hso_dev->port_spec = port_spec;
2101         hso_dev->usb = interface_to_usbdev(intf);
2102         hso_dev->interface = intf;
2103         kref_init(&hso_dev->ref);
2104         mutex_init(&hso_dev->mutex);
2105
2106         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2107         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2108
2109         return hso_dev;
2110 }
2111
2112 /* Removes a network device in the network device table */
2113 static int remove_net_device(struct hso_device *hso_dev)
2114 {
2115         int i;
2116
2117         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2118                 if (network_table[i] == hso_dev) {
2119                         network_table[i] = NULL;
2120                         break;
2121                 }
2122         }
2123         if (i == HSO_MAX_NET_DEVICES)
2124                 return -1;
2125         return 0;
2126 }
2127
2128 /* Frees our network device */
2129 static void hso_free_net_device(struct hso_device *hso_dev)
2130 {
2131         int i;
2132         struct hso_net *hso_net = dev2net(hso_dev);
2133
2134         if (!hso_net)
2135                 return;
2136
2137         /* start freeing */
2138         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2139                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2140                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2141         }
2142         usb_free_urb(hso_net->mux_bulk_tx_urb);
2143         kfree(hso_net->mux_bulk_tx_buf);
2144
2145         remove_net_device(hso_net->parent);
2146
2147         if (hso_net->net) {
2148                 unregister_netdev(hso_net->net);
2149                 free_netdev(hso_net->net);
2150         }
2151
2152         hso_free_device(hso_dev);
2153 }
2154
2155 /* initialize the network interface */
2156 static void hso_net_init(struct net_device *net)
2157 {
2158         struct hso_net *hso_net = netdev_priv(net);
2159
2160         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2161
2162         /* fill in the other fields */
2163         net->open = hso_net_open;
2164         net->stop = hso_net_close;
2165         net->hard_start_xmit = hso_net_start_xmit;
2166         net->tx_timeout = hso_net_tx_timeout;
2167         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2168         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2169         net->type = ARPHRD_NONE;
2170         net->mtu = DEFAULT_MTU - 14;
2171         net->tx_queue_len = 10;
2172         SET_ETHTOOL_OPS(net, &ops);
2173
2174         /* and initialize the semaphore */
2175         spin_lock_init(&hso_net->net_lock);
2176 }
2177
2178 /* Adds a network device in the network device table */
2179 static int add_net_device(struct hso_device *hso_dev)
2180 {
2181         int i;
2182
2183         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2184                 if (network_table[i] == NULL) {
2185                         network_table[i] = hso_dev;
2186                         break;
2187                 }
2188         }
2189         if (i == HSO_MAX_NET_DEVICES)
2190                 return -1;
2191         return 0;
2192 }
2193
2194 static int hso_radio_toggle(void *data, enum rfkill_state state)
2195 {
2196         struct hso_device *hso_dev = data;
2197         int enabled = (state == RFKILL_STATE_ON);
2198         int rv;
2199
2200         mutex_lock(&hso_dev->mutex);
2201         if (hso_dev->usb_gone)
2202                 rv = 0;
2203         else
2204                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2205                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2206                                        USB_CTRL_SET_TIMEOUT);
2207         mutex_unlock(&hso_dev->mutex);
2208         return rv;
2209 }
2210
2211 /* Creates and sets up everything for rfkill */
2212 static void hso_create_rfkill(struct hso_device *hso_dev,
2213                              struct usb_interface *interface)
2214 {
2215         struct hso_net *hso_net = dev2net(hso_dev);
2216         struct device *dev = &hso_net->net->dev;
2217         char *rfkn;
2218
2219         hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2220                                  RFKILL_TYPE_WWAN);
2221         if (!hso_net->rfkill) {
2222                 dev_err(dev, "%s - Out of memory\n", __func__);
2223                 return;
2224         }
2225         rfkn = kzalloc(20, GFP_KERNEL);
2226         if (!rfkn) {
2227                 rfkill_free(hso_net->rfkill);
2228                 hso_net->rfkill = NULL;
2229                 dev_err(dev, "%s - Out of memory\n", __func__);
2230                 return;
2231         }
2232         snprintf(rfkn, 20, "hso-%d",
2233                  interface->altsetting->desc.bInterfaceNumber);
2234         hso_net->rfkill->name = rfkn;
2235         hso_net->rfkill->state = RFKILL_STATE_ON;
2236         hso_net->rfkill->data = hso_dev;
2237         hso_net->rfkill->toggle_radio = hso_radio_toggle;
2238         if (rfkill_register(hso_net->rfkill) < 0) {
2239                 kfree(rfkn);
2240                 hso_net->rfkill->name = NULL;
2241                 rfkill_free(hso_net->rfkill);
2242                 hso_net->rfkill = NULL;
2243                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2244                 return;
2245         }
2246 }
2247
2248 /* Creates our network device */
2249 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2250 {
2251         int result, i;
2252         struct net_device *net;
2253         struct hso_net *hso_net;
2254         struct hso_device *hso_dev;
2255
2256         hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2257         if (!hso_dev)
2258                 return NULL;
2259
2260         /* allocate our network device, then we can put in our private data */
2261         /* call hso_net_init to do the basic initialization */
2262         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2263         if (!net) {
2264                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2265                 goto exit;
2266         }
2267
2268         hso_net = netdev_priv(net);
2269
2270         hso_dev->port_data.dev_net = hso_net;
2271         hso_net->net = net;
2272         hso_net->parent = hso_dev;
2273
2274         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2275                                       USB_DIR_IN);
2276         if (!hso_net->in_endp) {
2277                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2278                 goto exit;
2279         }
2280         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2281                                        USB_DIR_OUT);
2282         if (!hso_net->out_endp) {
2283                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2284                 goto exit;
2285         }
2286         SET_NETDEV_DEV(net, &interface->dev);
2287
2288         /* registering our net device */
2289         result = register_netdev(net);
2290         if (result) {
2291                 dev_err(&interface->dev, "Failed to register device\n");
2292                 goto exit;
2293         }
2294
2295         /* start allocating */
2296         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2297                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2298                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2299                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2300                         goto exit;
2301                 }
2302                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2303                                                            GFP_KERNEL);
2304                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2305                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2306                         goto exit;
2307                 }
2308         }
2309         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2310         if (!hso_net->mux_bulk_tx_urb) {
2311                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2312                 goto exit;
2313         }
2314         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2315         if (!hso_net->mux_bulk_tx_buf) {
2316                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2317                 goto exit;
2318         }
2319
2320         add_net_device(hso_dev);
2321
2322         hso_log_port(hso_dev);
2323
2324         hso_create_rfkill(hso_dev, interface);
2325
2326         return hso_dev;
2327 exit:
2328         hso_free_net_device(hso_dev);
2329         return NULL;
2330 }
2331
2332 /* Frees an AT channel ( goes for both mux and non-mux ) */
2333 static void hso_free_serial_device(struct hso_device *hso_dev)
2334 {
2335         struct hso_serial *serial = dev2ser(hso_dev);
2336
2337         if (!serial)
2338                 return;
2339         set_serial_by_index(serial->minor, NULL);
2340
2341         hso_serial_common_free(serial);
2342
2343         if (serial->shared_int) {
2344                 mutex_lock(&serial->shared_int->shared_int_lock);
2345                 if (--serial->shared_int->ref_count == 0)
2346                         hso_free_shared_int(serial->shared_int);
2347                 else
2348                         mutex_unlock(&serial->shared_int->shared_int_lock);
2349         }
2350         kfree(serial);
2351         hso_free_device(hso_dev);
2352 }
2353
2354 /* Creates a bulk AT channel */
2355 static struct hso_device *hso_create_bulk_serial_device(
2356                         struct usb_interface *interface, int port)
2357 {
2358         struct hso_device *hso_dev;
2359         struct hso_serial *serial;
2360         int num_urbs;
2361
2362         hso_dev = hso_create_device(interface, port);
2363         if (!hso_dev)
2364                 return NULL;
2365
2366         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2367         if (!serial)
2368                 goto exit;
2369
2370         serial->parent = hso_dev;
2371         hso_dev->port_data.dev_serial = serial;
2372
2373         if (port & HSO_PORT_MODEM)
2374                 num_urbs = 2;
2375         else
2376                 num_urbs = 1;
2377
2378         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2379                                      BULK_URB_TX_SIZE))
2380                 goto exit;
2381
2382         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2383                                      USB_DIR_IN);
2384         if (!serial->in_endp) {
2385                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2386                 goto exit2;
2387         }
2388
2389         if (!
2390             (serial->out_endp =
2391              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2392                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2393                 goto exit2;
2394         }
2395
2396         serial->write_data = hso_std_serial_write_data;
2397
2398         /* and record this serial */
2399         set_serial_by_index(serial->minor, serial);
2400
2401         /* setup the proc dirs and files if needed */
2402         hso_log_port(hso_dev);
2403
2404         /* done, return it */
2405         return hso_dev;
2406
2407 exit2:
2408         hso_serial_common_free(serial);
2409 exit:
2410         kfree(serial);
2411         hso_free_device(hso_dev);
2412         return NULL;
2413 }
2414
2415 /* Creates a multiplexed AT channel */
2416 static
2417 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2418                                                 int port,
2419                                                 struct hso_shared_int *mux)
2420 {
2421         struct hso_device *hso_dev;
2422         struct hso_serial *serial;
2423         int port_spec;
2424
2425         port_spec = HSO_INTF_MUX;
2426         port_spec &= ~HSO_PORT_MASK;
2427
2428         port_spec |= hso_mux_to_port(port);
2429         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2430                 return NULL;
2431
2432         hso_dev = hso_create_device(interface, port_spec);
2433         if (!hso_dev)
2434                 return NULL;
2435
2436         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2437         if (!serial)
2438                 goto exit;
2439
2440         hso_dev->port_data.dev_serial = serial;
2441         serial->parent = hso_dev;
2442
2443         if (hso_serial_common_create
2444             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2445                 goto exit;
2446
2447         serial->tx_data_length--;
2448         serial->write_data = hso_mux_serial_write_data;
2449
2450         serial->shared_int = mux;
2451         mutex_lock(&serial->shared_int->shared_int_lock);
2452         serial->shared_int->ref_count++;
2453         mutex_unlock(&serial->shared_int->shared_int_lock);
2454
2455         /* and record this serial */
2456         set_serial_by_index(serial->minor, serial);
2457
2458         /* setup the proc dirs and files if needed */
2459         hso_log_port(hso_dev);
2460
2461         /* done, return it */
2462         return hso_dev;
2463
2464 exit:
2465         if (serial) {
2466                 tty_unregister_device(tty_drv, serial->minor);
2467                 kfree(serial);
2468         }
2469         if (hso_dev)
2470                 hso_free_device(hso_dev);
2471         return NULL;
2472
2473 }
2474
2475 static void hso_free_shared_int(struct hso_shared_int *mux)
2476 {
2477         usb_free_urb(mux->shared_intr_urb);
2478         kfree(mux->shared_intr_buf);
2479         mutex_unlock(&mux->shared_int_lock);
2480         kfree(mux);
2481 }
2482
2483 static
2484 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2485 {
2486         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2487
2488         if (!mux)
2489                 return NULL;
2490
2491         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2492                                     USB_DIR_IN);
2493         if (!mux->intr_endp) {
2494                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2495                 goto exit;
2496         }
2497
2498         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2499         if (!mux->shared_intr_urb) {
2500                 dev_err(&interface->dev, "Could not allocate intr urb?");
2501                 goto exit;
2502         }
2503         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2504                                        GFP_KERNEL);
2505         if (!mux->shared_intr_buf) {
2506                 dev_err(&interface->dev, "Could not allocate intr buf?");
2507                 goto exit;
2508         }
2509
2510         mutex_init(&mux->shared_int_lock);
2511
2512         return mux;
2513
2514 exit:
2515         kfree(mux->shared_intr_buf);
2516         usb_free_urb(mux->shared_intr_urb);
2517         kfree(mux);
2518         return NULL;
2519 }
2520
2521 /* Gets the port spec for a certain interface */
2522 static int hso_get_config_data(struct usb_interface *interface)
2523 {
2524         struct usb_device *usbdev = interface_to_usbdev(interface);
2525         u8 config_data[17];
2526         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2527         s32 result;
2528
2529         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2530                             0x86, 0xC0, 0, 0, config_data, 17,
2531                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2532                 return -EIO;
2533         }
2534
2535         switch (config_data[if_num]) {
2536         case 0x0:
2537                 result = 0;
2538                 break;
2539         case 0x1:
2540                 result = HSO_PORT_DIAG;
2541                 break;
2542         case 0x2:
2543                 result = HSO_PORT_GPS;
2544                 break;
2545         case 0x3:
2546                 result = HSO_PORT_GPS_CONTROL;
2547                 break;
2548         case 0x4:
2549                 result = HSO_PORT_APP;
2550                 break;
2551         case 0x5:
2552                 result = HSO_PORT_APP2;
2553                 break;
2554         case 0x6:
2555                 result = HSO_PORT_CONTROL;
2556                 break;
2557         case 0x7:
2558                 result = HSO_PORT_NETWORK;
2559                 break;
2560         case 0x8:
2561                 result = HSO_PORT_MODEM;
2562                 break;
2563         case 0x9:
2564                 result = HSO_PORT_MSD;
2565                 break;
2566         case 0xa:
2567                 result = HSO_PORT_PCSC;
2568                 break;
2569         case 0xb:
2570                 result = HSO_PORT_VOICE;
2571                 break;
2572         default:
2573                 result = 0;
2574         }
2575
2576         if (result)
2577                 result |= HSO_INTF_BULK;
2578
2579         if (config_data[16] & 0x1)
2580                 result |= HSO_INFO_CRC_BUG;
2581
2582         return result;
2583 }
2584
2585 /* called once for each interface upon device insertion */
2586 static int hso_probe(struct usb_interface *interface,
2587                      const struct usb_device_id *id)
2588 {
2589         int mux, i, if_num, port_spec;
2590         unsigned char port_mask;
2591         struct hso_device *hso_dev = NULL;
2592         struct hso_shared_int *shared_int;
2593         struct hso_device *tmp_dev = NULL;
2594
2595         if_num = interface->altsetting->desc.bInterfaceNumber;
2596
2597         /* Get the interface/port specification from either driver_info or from
2598          * the device itself */
2599         if (id->driver_info)
2600                 port_spec = ((u32 *)(id->driver_info))[if_num];
2601         else
2602                 port_spec = hso_get_config_data(interface);
2603
2604         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2605                 dev_err(&interface->dev, "Not our interface\n");
2606                 return -ENODEV;
2607         }
2608         /* Check if we need to switch to alt interfaces prior to port
2609          * configuration */
2610         if (interface->num_altsetting > 1)
2611                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2612         interface->needs_remote_wakeup = 1;
2613
2614         /* Allocate new hso device(s) */
2615         switch (port_spec & HSO_INTF_MASK) {
2616         case HSO_INTF_MUX:
2617                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2618                         /* Create the network device */
2619                         if (!disable_net) {
2620                                 hso_dev = hso_create_net_device(interface);
2621                                 if (!hso_dev)
2622                                         goto exit;
2623                                 tmp_dev = hso_dev;
2624                         }
2625                 }
2626
2627                 if (hso_get_mux_ports(interface, &port_mask))
2628                         /* TODO: de-allocate everything */
2629                         goto exit;
2630
2631                 shared_int = hso_create_shared_int(interface);
2632                 if (!shared_int)
2633                         goto exit;
2634
2635                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2636                         if (port_mask & i) {
2637                                 hso_dev = hso_create_mux_serial_device(
2638                                                 interface, i, shared_int);
2639                                 if (!hso_dev)
2640                                         goto exit;
2641                         }
2642                 }
2643
2644                 if (tmp_dev)
2645                         hso_dev = tmp_dev;
2646                 break;
2647
2648         case HSO_INTF_BULK:
2649                 /* It's a regular bulk interface */
2650                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2651                     && !disable_net)
2652                         hso_dev = hso_create_net_device(interface);
2653                 else
2654                         hso_dev =
2655                             hso_create_bulk_serial_device(interface, port_spec);
2656                 if (!hso_dev)
2657                         goto exit;
2658                 break;
2659         default:
2660                 goto exit;
2661         }
2662
2663         usb_driver_claim_interface(&hso_driver, interface, hso_dev);
2664
2665         /* save our data pointer in this device */
2666         usb_set_intfdata(interface, hso_dev);
2667
2668         /* done */
2669         return 0;
2670 exit:
2671         hso_free_interface(interface);
2672         return -ENODEV;
2673 }
2674
2675 /* device removed, cleaning up */
2676 static void hso_disconnect(struct usb_interface *interface)
2677 {
2678         hso_free_interface(interface);
2679
2680         /* remove reference of our private data */
2681         usb_set_intfdata(interface, NULL);
2682
2683         usb_driver_release_interface(&hso_driver, interface);
2684 }
2685
2686 static void async_get_intf(struct work_struct *data)
2687 {
2688         struct hso_device *hso_dev =
2689             container_of(data, struct hso_device, async_get_intf);
2690         usb_autopm_get_interface(hso_dev->interface);
2691 }
2692
2693 static void async_put_intf(struct work_struct *data)
2694 {
2695         struct hso_device *hso_dev =
2696             container_of(data, struct hso_device, async_put_intf);
2697         usb_autopm_put_interface(hso_dev->interface);
2698 }
2699
2700 static int hso_get_activity(struct hso_device *hso_dev)
2701 {
2702         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2703                 if (!hso_dev->is_active) {
2704                         hso_dev->is_active = 1;
2705                         schedule_work(&hso_dev->async_get_intf);
2706                 }
2707         }
2708
2709         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2710                 return -EAGAIN;
2711
2712         usb_mark_last_busy(hso_dev->usb);
2713
2714         return 0;
2715 }
2716
2717 static int hso_put_activity(struct hso_device *hso_dev)
2718 {
2719         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2720                 if (hso_dev->is_active) {
2721                         hso_dev->is_active = 0;
2722                         schedule_work(&hso_dev->async_put_intf);
2723                         return -EAGAIN;
2724                 }
2725         }
2726         hso_dev->is_active = 0;
2727         return 0;
2728 }
2729
2730 /* called by kernel when we need to suspend device */
2731 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
2732 {
2733         int i, result;
2734
2735         /* Stop all serial ports */
2736         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2737                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2738                         result = hso_stop_serial_device(serial_table[i]);
2739                         if (result)
2740                                 goto out;
2741                 }
2742         }
2743
2744         /* Stop all network ports */
2745         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2746                 if (network_table[i] &&
2747                     (network_table[i]->interface == iface)) {
2748                         result = hso_stop_net_device(network_table[i]);
2749                         if (result)
2750                                 goto out;
2751                 }
2752         }
2753
2754 out:
2755         return 0;
2756 }
2757
2758 /* called by kernel when we need to resume device */
2759 static int hso_resume(struct usb_interface *iface)
2760 {
2761         int i, result = 0;
2762         struct hso_net *hso_net;
2763
2764         /* Start all serial ports */
2765         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2766                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2767                         if (dev2ser(serial_table[i])->open_count) {
2768                                 result =
2769                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
2770                                 hso_kick_transmit(dev2ser(serial_table[i]));
2771                                 if (result)
2772                                         goto out;
2773                         }
2774                 }
2775         }
2776
2777         /* Start all network ports */
2778         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2779                 if (network_table[i] &&
2780                     (network_table[i]->interface == iface)) {
2781                         hso_net = dev2net(network_table[i]);
2782                         if (hso_net->flags & IFF_UP) {
2783                                 /* First transmit any lingering data,
2784                                    then restart the device. */
2785                                 if (hso_net->skb_tx_buf) {
2786                                         dev_dbg(&iface->dev,
2787                                                 "Transmitting"
2788                                                 " lingering data\n");
2789                                         hso_net_start_xmit(hso_net->skb_tx_buf,
2790                                                            hso_net->net);
2791                                         hso_net->skb_tx_buf = NULL;
2792                                 }
2793                                 result = hso_start_net_device(network_table[i]);
2794                                 if (result)
2795                                         goto out;
2796                         }
2797                 }
2798         }
2799
2800 out:
2801         return result;
2802 }
2803
2804 static void hso_serial_ref_free(struct kref *ref)
2805 {
2806         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
2807
2808         hso_free_serial_device(hso_dev);
2809 }
2810
2811 static void hso_free_interface(struct usb_interface *interface)
2812 {
2813         struct hso_serial *hso_dev;
2814         struct tty_struct *tty;
2815         int i;
2816
2817         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2818                 if (serial_table[i]
2819                     && (serial_table[i]->interface == interface)) {
2820                         hso_dev = dev2ser(serial_table[i]);
2821                         spin_lock_irq(&hso_dev->serial_lock);
2822                         tty = tty_kref_get(hso_dev->tty);
2823                         spin_unlock_irq(&hso_dev->serial_lock);
2824                         if (tty)
2825                                 tty_hangup(tty);
2826                         mutex_lock(&hso_dev->parent->mutex);
2827                         tty_kref_put(tty);
2828                         hso_dev->parent->usb_gone = 1;
2829                         mutex_unlock(&hso_dev->parent->mutex);
2830                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
2831                 }
2832         }
2833
2834         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2835                 if (network_table[i]
2836                     && (network_table[i]->interface == interface)) {
2837                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
2838                         /* hso_stop_net_device doesn't stop the net queue since
2839                          * traffic needs to start it again when suspended */
2840                         netif_stop_queue(dev2net(network_table[i])->net);
2841                         hso_stop_net_device(network_table[i]);
2842                         cancel_work_sync(&network_table[i]->async_put_intf);
2843                         cancel_work_sync(&network_table[i]->async_get_intf);
2844                         if (rfk)
2845                                 rfkill_unregister(rfk);
2846                         hso_free_net_device(network_table[i]);
2847                 }
2848         }
2849 }
2850
2851 /* Helper functions */
2852
2853 /* Get the endpoint ! */
2854 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
2855                                                   int type, int dir)
2856 {
2857         int i;
2858         struct usb_host_interface *iface = intf->cur_altsetting;
2859         struct usb_endpoint_descriptor *endp;
2860
2861         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2862                 endp = &iface->endpoint[i].desc;
2863                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
2864                     (usb_endpoint_type(endp) == type))
2865                         return endp;
2866         }
2867
2868         return NULL;
2869 }
2870
2871 /* Get the byte that describes which ports are enabled */
2872 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
2873 {
2874         int i;
2875         struct usb_host_interface *iface = intf->cur_altsetting;
2876
2877         if (iface->extralen == 3) {
2878                 *ports = iface->extra[2];
2879                 return 0;
2880         }
2881
2882         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2883                 if (iface->endpoint[i].extralen == 3) {
2884                         *ports = iface->endpoint[i].extra[2];
2885                         return 0;
2886                 }
2887         }
2888
2889         return -1;
2890 }
2891
2892 /* interrupt urb needs to be submitted, used for serial read of muxed port */
2893 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
2894                                    struct usb_device *usb, gfp_t gfp)
2895 {
2896         int result;
2897
2898         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
2899                          usb_rcvintpipe(usb,
2900                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
2901                          shared_int->shared_intr_buf,
2902                          shared_int->intr_endp->wMaxPacketSize,
2903                          intr_callback, shared_int,
2904                          shared_int->intr_endp->bInterval);
2905
2906         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
2907         if (result)
2908                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
2909                         result);
2910
2911         return result;
2912 }
2913
2914 /* operations setup of the serial interface */
2915 static const struct tty_operations hso_serial_ops = {
2916         .open = hso_serial_open,
2917         .close = hso_serial_close,
2918         .write = hso_serial_write,
2919         .write_room = hso_serial_write_room,
2920         .set_termios = hso_serial_set_termios,
2921         .chars_in_buffer = hso_serial_chars_in_buffer,
2922         .tiocmget = hso_serial_tiocmget,
2923         .tiocmset = hso_serial_tiocmset,
2924         .unthrottle = hso_unthrottle
2925 };
2926
2927 static struct usb_driver hso_driver = {
2928         .name = driver_name,
2929         .probe = hso_probe,
2930         .disconnect = hso_disconnect,
2931         .id_table = hso_ids,
2932         .suspend = hso_suspend,
2933         .resume = hso_resume,
2934         .reset_resume = hso_resume,
2935         .supports_autosuspend = 1,
2936 };
2937
2938 static int __init hso_init(void)
2939 {
2940         int i;
2941         int result;
2942
2943         /* put it in the log */
2944         printk(KERN_INFO "hso: %s\n", version);
2945
2946         /* Initialise the serial table semaphore and table */
2947         spin_lock_init(&serial_table_lock);
2948         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
2949                 serial_table[i] = NULL;
2950
2951         /* allocate our driver using the proper amount of supported minors */
2952         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
2953         if (!tty_drv)
2954                 return -ENOMEM;
2955
2956         /* fill in all needed values */
2957         tty_drv->magic = TTY_DRIVER_MAGIC;
2958         tty_drv->owner = THIS_MODULE;
2959         tty_drv->driver_name = driver_name;
2960         tty_drv->name = tty_filename;
2961
2962         /* if major number is provided as parameter, use that one */
2963         if (tty_major)
2964                 tty_drv->major = tty_major;
2965
2966         tty_drv->minor_start = 0;
2967         tty_drv->num = HSO_SERIAL_TTY_MINORS;
2968         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
2969         tty_drv->subtype = SERIAL_TYPE_NORMAL;
2970         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2971         tty_drv->init_termios = tty_std_termios;
2972         tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2973         tty_drv->termios = hso_serial_termios;
2974         tty_drv->termios_locked = hso_serial_termios_locked;
2975         tty_set_operations(tty_drv, &hso_serial_ops);
2976
2977         /* register the tty driver */
2978         result = tty_register_driver(tty_drv);
2979         if (result) {
2980                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
2981                         __func__, result);
2982                 return result;
2983         }
2984
2985         /* register this module as an usb driver */
2986         result = usb_register(&hso_driver);
2987         if (result) {
2988                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
2989                         result);
2990                 /* cleanup serial interface */
2991                 tty_unregister_driver(tty_drv);
2992                 return result;
2993         }
2994
2995         /* done */
2996         return 0;
2997 }
2998
2999 static void __exit hso_exit(void)
3000 {
3001         printk(KERN_INFO "hso: unloaded\n");
3002
3003         tty_unregister_driver(tty_drv);
3004         /* deregister the usb driver */
3005         usb_deregister(&hso_driver);
3006 }
3007
3008 /* Module definitions */
3009 module_init(hso_init);
3010 module_exit(hso_exit);
3011
3012 MODULE_AUTHOR(MOD_AUTHOR);
3013 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3014 MODULE_LICENSE(MOD_LICENSE);
3015 MODULE_INFO(Version, DRIVER_VERSION);
3016
3017 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3018 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3019 module_param(debug, int, S_IRUGO | S_IWUSR);
3020
3021 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3022 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3023 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3024
3025 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3026 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3027 module_param(disable_net, int, S_IRUGO | S_IWUSR);