drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define DRIVER_VERSION                  "1.2"
  77 #define MOD_AUTHOR                      "Option Wireless"
  78 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  79 #define MOD_LICENSE                     "GPL"
  80
  81 #define HSO_MAX_NET_DEVICES             10
  82 #define HSO__MAX_MTU                    2048
  83 #define DEFAULT_MTU                     1500
  84 #define DEFAULT_MRU                     1500
  85
  86 #define CTRL_URB_RX_SIZE                1024
  87 #define CTRL_URB_TX_SIZE                64
  88
  89 #define BULK_URB_RX_SIZE                4096
  90 #define BULK_URB_TX_SIZE                8192
  91
  92 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  94 #define MUX_BULK_RX_BUF_COUNT           4
  95 #define USB_TYPE_OPTION_VENDOR          0x20
  96
  97 /* These definitions are used with the struct hso_net flags element */
  98 /* - use *_bit operations on it. (bit indices not values.) */
  99 #define HSO_NET_RUNNING                 0
 100
 101 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 102
 103 #define HSO_SERIAL_MAGIC                0x48534f31
 104
 105 /* Number of ttys to handle */
 106 #define HSO_SERIAL_TTY_MINORS           256
 107
 108 #define MAX_RX_URBS                     2
 109
 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 111 {
 112         if (tty)
 113                 return tty->driver_data;
 114         return NULL;
 115 }
 116
 117 /*****************************************************************************/
 118 /* Debugging functions                                                       */
 119 /*****************************************************************************/
 120 #define D__(lvl_, fmt, arg...)                          \
 121         do {                                            \
 122                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 123                        __LINE__, __func__, ## arg);     \
 124         } while (0)
 125
 126 #define D_(lvl, args...)                                \
 127         do {                                            \
 128                 if (lvl & debug)                        \
 129                         D__(KERN_INFO, args);           \
 130         } while (0)
 131
 132 #define D1(args...)     D_(0x01, ##args)
 133 #define D2(args...)     D_(0x02, ##args)
 134 #define D3(args...)     D_(0x04, ##args)
 135 #define D4(args...)     D_(0x08, ##args)
 136 #define D5(args...)     D_(0x10, ##args)
 137
 138 /*****************************************************************************/
 139 /* Enumerators                                                               */
 140 /*****************************************************************************/
 141 enum pkt_parse_state {
 142         WAIT_IP,
 143         WAIT_DATA,
 144         WAIT_SYNC
 145 };
 146
 147 /*****************************************************************************/
 148 /* Structs                                                                   */
 149 /*****************************************************************************/
 150
 151 struct hso_shared_int {
 152         struct usb_endpoint_descriptor *intr_endp;
 153         void *shared_intr_buf;
 154         struct urb *shared_intr_urb;
 155         struct usb_device *usb;
 156         int use_count;
 157         int ref_count;
 158         struct mutex shared_int_lock;
 159 };
 160
 161 struct hso_net {
 162         struct hso_device *parent;
 163         struct net_device *net;
 164         struct rfkill *rfkill;
 165
 166         struct usb_endpoint_descriptor *in_endp;
 167         struct usb_endpoint_descriptor *out_endp;
 168
 169         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 170         struct urb *mux_bulk_tx_urb;
 171         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 172         void *mux_bulk_tx_buf;
 173
 174         struct sk_buff *skb_rx_buf;
 175         struct sk_buff *skb_tx_buf;
 176
 177         enum pkt_parse_state rx_parse_state;
 178         spinlock_t net_lock;
 179
 180         unsigned short rx_buf_size;
 181         unsigned short rx_buf_missing;
 182         struct iphdr rx_ip_hdr;
 183
 184         unsigned long flags;
 185 };
 186
 187 enum rx_ctrl_state{
 188         RX_IDLE,
 189         RX_SENT,
 190         RX_PENDING
 191 };
 192
 193 #define BM_REQUEST_TYPE (0xa1)
 194 #define B_NOTIFICATION  (0x20)
 195 #define W_VALUE         (0x0)
 196 #define W_INDEX         (0x2)
 197 #define W_LENGTH        (0x2)
 198
 199 #define B_OVERRUN       (0x1<<6)
 200 #define B_PARITY        (0x1<<5)
 201 #define B_FRAMING       (0x1<<4)
 202 #define B_RING_SIGNAL   (0x1<<3)
 203 #define B_BREAK         (0x1<<2)
 204 #define B_TX_CARRIER    (0x1<<1)
 205 #define B_RX_CARRIER    (0x1<<0)
 206
 207 struct hso_serial_state_notification {
 208         u8 bmRequestType;
 209         u8 bNotification;
 210         u16 wValue;
 211         u16 wIndex;
 212         u16 wLength;
 213         u16 UART_state_bitmap;
 214 } __attribute__((packed));
 215
 216 struct hso_tiocmget {
 217         struct mutex mutex;
 218         wait_queue_head_t waitq;
 219         int    intr_completed;
 220         struct usb_endpoint_descriptor *endp;
 221         struct urb *urb;
 222         struct hso_serial_state_notification serial_state_notification;
 223         u16    prev_UART_state_bitmap;
 224         struct uart_icount icount;
 225 };
 226
 227
 228 struct hso_serial {
 229         struct hso_device *parent;
 230         int magic;
 231         u8 minor;
 232
 233         struct hso_shared_int *shared_int;
 234
 235         /* rx/tx urb could be either a bulk urb or a control urb depending
 236            on which serial port it is used on. */
 237         struct urb *rx_urb[MAX_RX_URBS];
 238         u8 num_rx_urbs;
 239         u8 *rx_data[MAX_RX_URBS];
 240         u16 rx_data_length;     /* should contain allocated length */
 241
 242         struct urb *tx_urb;
 243         u8 *tx_data;
 244         u8 *tx_buffer;
 245         u16 tx_data_length;     /* should contain allocated length */
 246         u16 tx_data_count;
 247         u16 tx_buffer_count;
 248         struct usb_ctrlrequest ctrl_req_tx;
 249         struct usb_ctrlrequest ctrl_req_rx;
 250
 251         struct usb_endpoint_descriptor *in_endp;
 252         struct usb_endpoint_descriptor *out_endp;
 253
 254         enum rx_ctrl_state rx_state;
 255         u8 rts_state;
 256         u8 dtr_state;
 257         unsigned tx_urb_used:1;
 258
 259         /* from usb_serial_port */
 260         struct tty_struct *tty;
 261         int open_count;
 262         spinlock_t serial_lock;
 263
 264         int (*write_data) (struct hso_serial *serial);
 265         struct hso_tiocmget  *tiocmget;
 266         /* Hacks required to get flow control
 267          * working on the serial receive buffers
 268          * so as not to drop characters on the floor.
 269          */
 270         int  curr_rx_urb_idx;
 271         u16  curr_rx_urb_offset;
 272         u8   rx_urb_filled[MAX_RX_URBS];
 273         struct tasklet_struct unthrottle_tasklet;
 274         struct work_struct    retry_unthrottle_workqueue;
 275 };
 276
 277 struct hso_device {
 278         union {
 279                 struct hso_serial *dev_serial;
 280                 struct hso_net *dev_net;
 281         } port_data;
 282
 283         u32 port_spec;
 284
 285         u8 is_active;
 286         u8 usb_gone;
 287         struct work_struct async_get_intf;
 288         struct work_struct async_put_intf;
 289
 290         struct usb_device *usb;
 291         struct usb_interface *interface;
 292
 293         struct device *dev;
 294         struct kref ref;
 295         struct mutex mutex;
 296 };
 297
 298 /* Type of interface */
 299 #define HSO_INTF_MASK           0xFF00
 300 #define HSO_INTF_MUX            0x0100
 301 #define HSO_INTF_BULK           0x0200
 302
 303 /* Type of port */
 304 #define HSO_PORT_MASK           0xFF
 305 #define HSO_PORT_NO_PORT        0x0
 306 #define HSO_PORT_CONTROL        0x1
 307 #define HSO_PORT_APP            0x2
 308 #define HSO_PORT_GPS            0x3
 309 #define HSO_PORT_PCSC           0x4
 310 #define HSO_PORT_APP2           0x5
 311 #define HSO_PORT_GPS_CONTROL    0x6
 312 #define HSO_PORT_MSD            0x7
 313 #define HSO_PORT_VOICE          0x8
 314 #define HSO_PORT_DIAG2          0x9
 315 #define HSO_PORT_DIAG           0x10
 316 #define HSO_PORT_MODEM          0x11
 317 #define HSO_PORT_NETWORK        0x12
 318
 319 /* Additional device info */
 320 #define HSO_INFO_MASK           0xFF000000
 321 #define HSO_INFO_CRC_BUG        0x01000000
 322
 323 /*****************************************************************************/
 324 /* Prototypes                                                                */
 325 /*****************************************************************************/
 326 /* Serial driver functions */
 327 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 328                                unsigned int set, unsigned int clear);
 329 static void ctrl_callback(struct urb *urb);
 330 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 331 static void hso_kick_transmit(struct hso_serial *serial);
 332 /* Helper functions */
 333 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 334                                    struct usb_device *usb, gfp_t gfp);
 335 static void log_usb_status(int status, const char *function);
 336 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 337                                                   int type, int dir);
 338 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 339 static void hso_free_interface(struct usb_interface *intf);
 340 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 341 static int hso_stop_serial_device(struct hso_device *hso_dev);
 342 static int hso_start_net_device(struct hso_device *hso_dev);
 343 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 344 static int hso_stop_net_device(struct hso_device *hso_dev);
 345 static void hso_serial_ref_free(struct kref *ref);
 346 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 347 static int hso_mux_serial_read(struct hso_serial *serial);
 348 static void async_get_intf(struct work_struct *data);
 349 static void async_put_intf(struct work_struct *data);
 350 static int hso_put_activity(struct hso_device *hso_dev);
 351 static int hso_get_activity(struct hso_device *hso_dev);
 352 static void tiocmget_intr_callback(struct urb *urb);
 353 /*****************************************************************************/
 354 /* Helping functions                                                         */
 355 /*****************************************************************************/
 356
 357 /* #define DEBUG */
 358
 359 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 360 {
 361         return hso_dev->port_data.dev_net;
 362 }
 363
 364 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 365 {
 366         return hso_dev->port_data.dev_serial;
 367 }
 368
 369 /* Debugging functions */
 370 #ifdef DEBUG
 371 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 372                      unsigned int len)
 373 {
 374         static char name[255];
 375
 376         sprintf(name, "hso[%d:%s]", line_count, func_name);
 377         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 378 }
 379
 380 #define DUMP(buf_, len_)        \
 381         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 382
 383 #define DUMP1(buf_, len_)                       \
 384         do {                                    \
 385                 if (0x01 & debug)               \
 386                         DUMP(buf_, len_);       \
 387         } while (0)
 388 #else
 389 #define DUMP(buf_, len_)
 390 #define DUMP1(buf_, len_)
 391 #endif
 392
 393 /* module parameters */
 394 static int debug;
 395 static int tty_major;
 396 static int disable_net;
 397
 398 /* driver info */
 399 static const char driver_name[] = "hso";
 400 static const char tty_filename[] = "ttyHS";
 401 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 402 /* the usb driver itself (registered in hso_init) */
 403 static struct usb_driver hso_driver;
 404 /* serial structures */
 405 static struct tty_driver *tty_drv;
 406 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 407 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 408 static spinlock_t serial_table_lock;
 409
 410 static const s32 default_port_spec[] = {
 411         HSO_INTF_MUX | HSO_PORT_NETWORK,
 412         HSO_INTF_BULK | HSO_PORT_DIAG,
 413         HSO_INTF_BULK | HSO_PORT_MODEM,
 414         0
 415 };
 416
 417 static const s32 icon321_port_spec[] = {
 418         HSO_INTF_MUX | HSO_PORT_NETWORK,
 419         HSO_INTF_BULK | HSO_PORT_DIAG2,
 420         HSO_INTF_BULK | HSO_PORT_MODEM,
 421         HSO_INTF_BULK | HSO_PORT_DIAG,
 422         0
 423 };
 424
 425 #define default_port_device(vendor, product)    \
 426         USB_DEVICE(vendor, product),    \
 427                 .driver_info = (kernel_ulong_t)default_port_spec
 428
 429 #define icon321_port_device(vendor, product)    \
 430         USB_DEVICE(vendor, product),    \
 431                 .driver_info = (kernel_ulong_t)icon321_port_spec
 432
 433 /* list of devices we support */
 434 static const struct usb_device_id hso_ids[] = {
 435         {default_port_device(0x0af0, 0x6711)},
 436         {default_port_device(0x0af0, 0x6731)},
 437         {default_port_device(0x0af0, 0x6751)},
 438         {default_port_device(0x0af0, 0x6771)},
 439         {default_port_device(0x0af0, 0x6791)},
 440         {default_port_device(0x0af0, 0x6811)},
 441         {default_port_device(0x0af0, 0x6911)},
 442         {default_port_device(0x0af0, 0x6951)},
 443         {default_port_device(0x0af0, 0x6971)},
 444         {default_port_device(0x0af0, 0x7011)},
 445         {default_port_device(0x0af0, 0x7031)},
 446         {default_port_device(0x0af0, 0x7051)},
 447         {default_port_device(0x0af0, 0x7071)},
 448         {default_port_device(0x0af0, 0x7111)},
 449         {default_port_device(0x0af0, 0x7211)},
 450         {default_port_device(0x0af0, 0x7251)},
 451         {default_port_device(0x0af0, 0x7271)},
 452         {default_port_device(0x0af0, 0x7311)},
 453         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 454         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 455         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 456         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 457         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 458         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 459         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 460         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 461         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 462         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 463         {USB_DEVICE(0x0af0, 0x7701)},
 464         {USB_DEVICE(0x0af0, 0x7801)},
 465         {USB_DEVICE(0x0af0, 0x7901)},
 466         {USB_DEVICE(0x0af0, 0x8200)},
 467         {USB_DEVICE(0x0af0, 0x8201)},
 468         {USB_DEVICE(0x0af0, 0xd035)},
 469         {USB_DEVICE(0x0af0, 0xd055)},
 470         {USB_DEVICE(0x0af0, 0xd155)},
 471         {USB_DEVICE(0x0af0, 0xd255)},
 472         {USB_DEVICE(0x0af0, 0xd057)},
 473         {USB_DEVICE(0x0af0, 0xd157)},
 474         {USB_DEVICE(0x0af0, 0xd257)},
 475         {USB_DEVICE(0x0af0, 0xd357)},
 476         {}
 477 };
 478 MODULE_DEVICE_TABLE(usb, hso_ids);
 479
 480 /* Sysfs attribute */
 481 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 482                                        struct device_attribute *attr,
 483                                        char *buf)
 484 {
 485         struct hso_device *hso_dev = dev_get_drvdata(dev);
 486         char *port_name;
 487
 488         if (!hso_dev)
 489                 return 0;
 490
 491         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 492         case HSO_PORT_CONTROL:
 493                 port_name = "Control";
 494                 break;
 495         case HSO_PORT_APP:
 496                 port_name = "Application";
 497                 break;
 498         case HSO_PORT_APP2:
 499                 port_name = "Application2";
 500                 break;
 501         case HSO_PORT_GPS:
 502                 port_name = "GPS";
 503                 break;
 504         case HSO_PORT_GPS_CONTROL:
 505                 port_name = "GPS Control";
 506                 break;
 507         case HSO_PORT_PCSC:
 508                 port_name = "PCSC";
 509                 break;
 510         case HSO_PORT_DIAG:
 511                 port_name = "Diagnostic";
 512                 break;
 513         case HSO_PORT_DIAG2:
 514                 port_name = "Diagnostic2";
 515                 break;
 516         case HSO_PORT_MODEM:
 517                 port_name = "Modem";
 518                 break;
 519         case HSO_PORT_NETWORK:
 520                 port_name = "Network";
 521                 break;
 522         default:
 523                 port_name = "Unknown";
 524                 break;
 525         }
 526
 527         return sprintf(buf, "%s\n", port_name);
 528 }
 529 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 530
 531 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 532 {
 533         int idx;
 534
 535         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 536                 if (serial->rx_urb[idx] == urb)
 537                         return idx;
 538         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 539         return -1;
 540 }
 541
 542 /* converts mux value to a port spec value */
 543 static u32 hso_mux_to_port(int mux)
 544 {
 545         u32 result;
 546
 547         switch (mux) {
 548         case 0x1:
 549                 result = HSO_PORT_CONTROL;
 550                 break;
 551         case 0x2:
 552                 result = HSO_PORT_APP;
 553                 break;
 554         case 0x4:
 555                 result = HSO_PORT_PCSC;
 556                 break;
 557         case 0x8:
 558                 result = HSO_PORT_GPS;
 559                 break;
 560         case 0x10:
 561                 result = HSO_PORT_APP2;
 562                 break;
 563         default:
 564                 result = HSO_PORT_NO_PORT;
 565         }
 566         return result;
 567 }
 568
 569 /* converts port spec value to a mux value */
 570 static u32 hso_port_to_mux(int port)
 571 {
 572         u32 result;
 573
 574         switch (port & HSO_PORT_MASK) {
 575         case HSO_PORT_CONTROL:
 576                 result = 0x0;
 577                 break;
 578         case HSO_PORT_APP:
 579                 result = 0x1;
 580                 break;
 581         case HSO_PORT_PCSC:
 582                 result = 0x2;
 583                 break;
 584         case HSO_PORT_GPS:
 585                 result = 0x3;
 586                 break;
 587         case HSO_PORT_APP2:
 588                 result = 0x4;
 589                 break;
 590         default:
 591                 result = 0x0;
 592         }
 593         return result;
 594 }
 595
 596 static struct hso_serial *get_serial_by_shared_int_and_type(
 597                                         struct hso_shared_int *shared_int,
 598                                         int mux)
 599 {
 600         int i, port;
 601
 602         port = hso_mux_to_port(mux);
 603
 604         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 605                 if (serial_table[i] &&
 606                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 607                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 608                         return dev2ser(serial_table[i]);
 609                 }
 610         }
 611
 612         return NULL;
 613 }
 614
 615 static struct hso_serial *get_serial_by_index(unsigned index)
 616 {
 617         struct hso_serial *serial = NULL;
 618         unsigned long flags;
 619
 620         spin_lock_irqsave(&serial_table_lock, flags);
 621         if (serial_table[index])
 622                 serial = dev2ser(serial_table[index]);
 623         spin_unlock_irqrestore(&serial_table_lock, flags);
 624
 625         return serial;
 626 }
 627
 628 static int get_free_serial_index(void)
 629 {
 630         int index;
 631         unsigned long flags;
 632
 633         spin_lock_irqsave(&serial_table_lock, flags);
 634         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 635                 if (serial_table[index] == NULL) {
 636                         spin_unlock_irqrestore(&serial_table_lock, flags);
 637                         return index;
 638                 }
 639         }
 640         spin_unlock_irqrestore(&serial_table_lock, flags);
 641
 642         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 643         return -1;
 644 }
 645
 646 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 647 {
 648         unsigned long flags;
 649
 650         spin_lock_irqsave(&serial_table_lock, flags);
 651         if (serial)
 652                 serial_table[index] = serial->parent;
 653         else
 654                 serial_table[index] = NULL;
 655         spin_unlock_irqrestore(&serial_table_lock, flags);
 656 }
 657
 658 /* log a meaningful explanation of an USB status */
 659 static void log_usb_status(int status, const char *function)
 660 {
 661         char *explanation;
 662
 663         switch (status) {
 664         case -ENODEV:
 665                 explanation = "no device";
 666                 break;
 667         case -ENOENT:
 668                 explanation = "endpoint not enabled";
 669                 break;
 670         case -EPIPE:
 671                 explanation = "endpoint stalled";
 672                 break;
 673         case -ENOSPC:
 674                 explanation = "not enough bandwidth";
 675                 break;
 676         case -ESHUTDOWN:
 677                 explanation = "device disabled";
 678                 break;
 679         case -EHOSTUNREACH:
 680                 explanation = "device suspended";
 681                 break;
 682         case -EINVAL:
 683         case -EAGAIN:
 684         case -EFBIG:
 685         case -EMSGSIZE:
 686                 explanation = "internal error";
 687                 break;
 688         default:
 689                 explanation = "unknown status";
 690                 break;
 691         }
 692         D1("%s: received USB status - %s (%d)", function, explanation, status);
 693 }
 694
 695 /* Network interface functions */
 696
 697 /* called when net interface is brought up by ifconfig */
 698 static int hso_net_open(struct net_device *net)
 699 {
 700         struct hso_net *odev = netdev_priv(net);
 701         unsigned long flags = 0;
 702
 703         if (!odev) {
 704                 dev_err(&net->dev, "No net device !\n");
 705                 return -ENODEV;
 706         }
 707
 708         odev->skb_tx_buf = NULL;
 709
 710         /* setup environment */
 711         spin_lock_irqsave(&odev->net_lock, flags);
 712         odev->rx_parse_state = WAIT_IP;
 713         odev->rx_buf_size = 0;
 714         odev->rx_buf_missing = sizeof(struct iphdr);
 715         spin_unlock_irqrestore(&odev->net_lock, flags);
 716
 717         /* We are up and running. */
 718         set_bit(HSO_NET_RUNNING, &odev->flags);
 719         hso_start_net_device(odev->parent);
 720
 721         /* Tell the kernel we are ready to start receiving from it */
 722         netif_start_queue(net);
 723
 724         return 0;
 725 }
 726
 727 /* called when interface is brought down by ifconfig */
 728 static int hso_net_close(struct net_device *net)
 729 {
 730         struct hso_net *odev = netdev_priv(net);
 731
 732         /* we don't need the queue anymore */
 733         netif_stop_queue(net);
 734         /* no longer running */
 735         clear_bit(HSO_NET_RUNNING, &odev->flags);
 736
 737         hso_stop_net_device(odev->parent);
 738
 739         /* done */
 740         return 0;
 741 }
 742
 743 /* USB tells is xmit done, we should start the netqueue again */
 744 static void write_bulk_callback(struct urb *urb)
 745 {
 746         struct hso_net *odev = urb->context;
 747         int status = urb->status;
 748
 749         /* Sanity check */
 750         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 751                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 752                 return;
 753         }
 754
 755         /* Do we still have a valid kernel network device? */
 756         if (!netif_device_present(odev->net)) {
 757                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 758                         __func__);
 759                 return;
 760         }
 761
 762         /* log status, but don't act on it, we don't need to resubmit anything
 763          * anyhow */
 764         if (status)
 765                 log_usb_status(status, __func__);
 766
 767         hso_put_activity(odev->parent);
 768
 769         /* Tell the network interface we are ready for another frame */
 770         netif_wake_queue(odev->net);
 771 }
 772
 773 /* called by kernel when we need to transmit a packet */
 774 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 775                                             struct net_device *net)
 776 {
 777         struct hso_net *odev = netdev_priv(net);
 778         int result;
 779
 780         /* Tell the kernel, "No more frames 'til we are done with this one." */
 781         netif_stop_queue(net);
 782         if (hso_get_activity(odev->parent) == -EAGAIN) {
 783                 odev->skb_tx_buf = skb;
 784                 return NETDEV_TX_OK;
 785         }
 786
 787         /* log if asked */
 788         DUMP1(skb->data, skb->len);
 789         /* Copy it from kernel memory to OUR memory */
 790         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 791         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 792
 793         /* Fill in the URB for shipping it out. */
 794         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 795                           odev->parent->usb,
 796                           usb_sndbulkpipe(odev->parent->usb,
 797                                           odev->out_endp->
 798                                           bEndpointAddress & 0x7F),
 799                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 800                           odev);
 801
 802         /* Deal with the Zero Length packet problem, I hope */
 803         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 804
 805         /* Send the URB on its merry way. */
 806         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 807         if (result) {
 808                 dev_warn(&odev->parent->interface->dev,
 809                         "failed mux_bulk_tx_urb %d", result);
 810                 net->stats.tx_errors++;
 811                 netif_start_queue(net);
 812         } else {
 813                 net->stats.tx_packets++;
 814                 net->stats.tx_bytes += skb->len;
 815                 /* And tell the kernel when the last transmit started. */
 816                 net->trans_start = jiffies;
 817         }
 818         dev_kfree_skb(skb);
 819         /* we're done */
 820         return NETDEV_TX_OK;
 821 }
 822
 823 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 824 {
 825         struct hso_net *odev = netdev_priv(net);
 826
 827         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 828         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 829         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 830 }
 831
 832 static const struct ethtool_ops ops = {
 833         .get_drvinfo = hso_get_drvinfo,
 834         .get_link = ethtool_op_get_link
 835 };
 836
 837 /* called when a packet did not ack after watchdogtimeout */
 838 static void hso_net_tx_timeout(struct net_device *net)
 839 {
 840         struct hso_net *odev = netdev_priv(net);
 841
 842         if (!odev)
 843                 return;
 844
 845         /* Tell syslog we are hosed. */
 846         dev_warn(&net->dev, "Tx timed out.\n");
 847
 848         /* Tear the waiting frame off the list */
 849         if (odev->mux_bulk_tx_urb &&
 850             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 851                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 852
 853         /* Update statistics */
 854         net->stats.tx_errors++;
 855 }
 856
 857 /* make a real packet from the received USB buffer */
 858 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 859                         unsigned int count, unsigned char is_eop)
 860 {
 861         unsigned short temp_bytes;
 862         unsigned short buffer_offset = 0;
 863         unsigned short frame_len;
 864         unsigned char *tmp_rx_buf;
 865
 866         /* log if needed */
 867         D1("Rx %d bytes", count);
 868         DUMP(ip_pkt, min(128, (int)count));
 869
 870         while (count) {
 871                 switch (odev->rx_parse_state) {
 872                 case WAIT_IP:
 873                         /* waiting for IP header. */
 874                         /* wanted bytes - size of ip header */
 875                         temp_bytes =
 876                             (count <
 877                              odev->rx_buf_missing) ? count : odev->
 878                             rx_buf_missing;
 879
 880                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 881                                odev->rx_buf_size, ip_pkt + buffer_offset,
 882                                temp_bytes);
 883
 884                         odev->rx_buf_size += temp_bytes;
 885                         buffer_offset += temp_bytes;
 886                         odev->rx_buf_missing -= temp_bytes;
 887                         count -= temp_bytes;
 888
 889                         if (!odev->rx_buf_missing) {
 890                                 /* header is complete allocate an sk_buffer and
 891                                  * continue to WAIT_DATA */
 892                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 893
 894                                 if ((frame_len > DEFAULT_MRU) ||
 895                                     (frame_len < sizeof(struct iphdr))) {
 896                                         dev_err(&odev->net->dev,
 897                                                 "Invalid frame (%d) length\n",
 898                                                 frame_len);
 899                                         odev->rx_parse_state = WAIT_SYNC;
 900                                         continue;
 901                                 }
 902                                 /* Allocate an sk_buff */
 903                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 904                                                                     frame_len);
 905                                 if (!odev->skb_rx_buf) {
 906                                         /* We got no receive buffer. */
 907                                         D1("could not allocate memory");
 908                                         odev->rx_parse_state = WAIT_SYNC;
 909                                         return;
 910                                 }
 911
 912                                 /* Copy what we got so far. make room for iphdr
 913                                  * after tail. */
 914                                 tmp_rx_buf =
 915                                     skb_put(odev->skb_rx_buf,
 916                                             sizeof(struct iphdr));
 917                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 918                                        sizeof(struct iphdr));
 919
 920                                 /* ETH_HLEN */
 921                                 odev->rx_buf_size = sizeof(struct iphdr);
 922
 923                                 /* Filip actually use .tot_len */
 924                                 odev->rx_buf_missing =
 925                                     frame_len - sizeof(struct iphdr);
 926                                 odev->rx_parse_state = WAIT_DATA;
 927                         }
 928                         break;
 929
 930                 case WAIT_DATA:
 931                         temp_bytes = (count < odev->rx_buf_missing)
 932                                         ? count : odev->rx_buf_missing;
 933
 934                         /* Copy the rest of the bytes that are left in the
 935                          * buffer into the waiting sk_buf. */
 936                         /* Make room for temp_bytes after tail. */
 937                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 938                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 939
 940                         odev->rx_buf_missing -= temp_bytes;
 941                         count -= temp_bytes;
 942                         buffer_offset += temp_bytes;
 943                         odev->rx_buf_size += temp_bytes;
 944                         if (!odev->rx_buf_missing) {
 945                                 /* Packet is complete. Inject into stack. */
 946                                 /* We have IP packet here */
 947                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 948                                 /* don't check it */
 949                                 odev->skb_rx_buf->ip_summed =
 950                                         CHECKSUM_UNNECESSARY;
 951
 952                                 skb_reset_mac_header(odev->skb_rx_buf);
 953
 954                                 /* Ship it off to the kernel */
 955                                 netif_rx(odev->skb_rx_buf);
 956                                 /* No longer our buffer. */
 957                                 odev->skb_rx_buf = NULL;
 958
 959                                 /* update out statistics */
 960                                 odev->net->stats.rx_packets++;
 961
 962                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 963
 964                                 odev->rx_buf_size = 0;
 965                                 odev->rx_buf_missing = sizeof(struct iphdr);
 966                                 odev->rx_parse_state = WAIT_IP;
 967                         }
 968                         break;
 969
 970                 case WAIT_SYNC:
 971                         D1(" W_S");
 972                         count = 0;
 973                         break;
 974                 default:
 975                         D1(" ");
 976                         count--;
 977                         break;
 978                 }
 979         }
 980
 981         /* Recovery mechanism for WAIT_SYNC state. */
 982         if (is_eop) {
 983                 if (odev->rx_parse_state == WAIT_SYNC) {
 984                         odev->rx_parse_state = WAIT_IP;
 985                         odev->rx_buf_size = 0;
 986                         odev->rx_buf_missing = sizeof(struct iphdr);
 987                 }
 988         }
 989 }
 990
 991 /* Moving data from usb to kernel (in interrupt state) */
 992 static void read_bulk_callback(struct urb *urb)
 993 {
 994         struct hso_net *odev = urb->context;
 995         struct net_device *net;
 996         int result;
 997         int status = urb->status;
 998
 999         /* is al ok?  (Filip: Who's Al ?) */
1000         if (status) {
1001                 log_usb_status(status, __func__);
1002                 return;
1003         }
1004
1005         /* Sanity check */
1006         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1007                 D1("BULK IN callback but driver is not active!");
1008                 return;
1009         }
1010         usb_mark_last_busy(urb->dev);
1011
1012         net = odev->net;
1013
1014         if (!netif_device_present(net)) {
1015                 /* Somebody killed our network interface... */
1016                 return;
1017         }
1018
1019         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1020                 u32 rest;
1021                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1022                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
1023                 if (((rest == 5) || (rest == 6)) &&
1024                     !memcmp(((u8 *) urb->transfer_buffer) +
1025                             urb->actual_length - 4, crc_check, 4)) {
1026                         urb->actual_length -= 4;
1027                 }
1028         }
1029
1030         /* do we even have a packet? */
1031         if (urb->actual_length) {
1032                 /* Handle the IP stream, add header and push it onto network
1033                  * stack if the packet is complete. */
1034                 spin_lock(&odev->net_lock);
1035                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1036                             (urb->transfer_buffer_length >
1037                              urb->actual_length) ? 1 : 0);
1038                 spin_unlock(&odev->net_lock);
1039         }
1040
1041         /* We are done with this URB, resubmit it. Prep the USB to wait for
1042          * another frame. Reuse same as received. */
1043         usb_fill_bulk_urb(urb,
1044                           odev->parent->usb,
1045                           usb_rcvbulkpipe(odev->parent->usb,
1046                                           odev->in_endp->
1047                                           bEndpointAddress & 0x7F),
1048                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1049                           read_bulk_callback, odev);
1050
1051         /* Give this to the USB subsystem so it can tell us when more data
1052          * arrives. */
1053         result = usb_submit_urb(urb, GFP_ATOMIC);
1054         if (result)
1055                 dev_warn(&odev->parent->interface->dev,
1056                          "%s failed submit mux_bulk_rx_urb %d", __func__,
1057                          result);
1058 }
1059
1060 /* Serial driver functions */
1061
1062 static void hso_init_termios(struct ktermios *termios)
1063 {
1064         /*
1065          * The default requirements for this device are:
1066          */
1067         termios->c_iflag &=
1068                 ~(IGNBRK        /* disable ignore break */
1069                 | BRKINT        /* disable break causes interrupt */
1070                 | PARMRK        /* disable mark parity errors */
1071                 | ISTRIP        /* disable clear high bit of input characters */
1072                 | INLCR         /* disable translate NL to CR */
1073                 | IGNCR         /* disable ignore CR */
1074                 | ICRNL         /* disable translate CR to NL */
1075                 | IXON);        /* disable enable XON/XOFF flow control */
1076
1077         /* disable postprocess output characters */
1078         termios->c_oflag &= ~OPOST;
1079
1080         termios->c_lflag &=
1081                 ~(ECHO          /* disable echo input characters */
1082                 | ECHONL        /* disable echo new line */
1083                 | ICANON        /* disable erase, kill, werase, and rprnt
1084                                    special characters */
1085                 | ISIG          /* disable interrupt, quit, and suspend special
1086                                    characters */
1087                 | IEXTEN);      /* disable non-POSIX special characters */
1088
1089         termios->c_cflag &=
1090                 ~(CSIZE         /* no size */
1091                 | PARENB        /* disable parity bit */
1092                 | CBAUD         /* clear current baud rate */
1093                 | CBAUDEX);     /* clear current buad rate */
1094
1095         termios->c_cflag |= CS8;        /* character size 8 bits */
1096
1097         /* baud rate 115200 */
1098         tty_termios_encode_baud_rate(termios, 115200, 115200);
1099 }
1100
1101 static void _hso_serial_set_termios(struct tty_struct *tty,
1102                                     struct ktermios *old)
1103 {
1104         struct hso_serial *serial = get_serial_by_tty(tty);
1105         struct ktermios *termios;
1106
1107         if (!serial) {
1108                 printk(KERN_ERR "%s: no tty structures", __func__);
1109                 return;
1110         }
1111
1112         D4("port %d", serial->minor);
1113
1114         /*
1115          *      Fix up unsupported bits
1116          */
1117         termios = tty->termios;
1118         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1119
1120         termios->c_cflag &=
1121                 ~(CSIZE         /* no size */
1122                 | PARENB        /* disable parity bit */
1123                 | CBAUD         /* clear current baud rate */
1124                 | CBAUDEX);     /* clear current buad rate */
1125
1126         termios->c_cflag |= CS8;        /* character size 8 bits */
1127
1128         /* baud rate 115200 */
1129         tty_encode_baud_rate(tty, 115200, 115200);
1130 }
1131
1132 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1133 {
1134         int result;
1135 #ifdef CONFIG_HSO_AUTOPM
1136         usb_mark_last_busy(urb->dev);
1137 #endif
1138         /* We are done with this URB, resubmit it. Prep the USB to wait for
1139          * another frame */
1140         usb_fill_bulk_urb(urb, serial->parent->usb,
1141                           usb_rcvbulkpipe(serial->parent->usb,
1142                                           serial->in_endp->
1143                                           bEndpointAddress & 0x7F),
1144                           urb->transfer_buffer, serial->rx_data_length,
1145                           hso_std_serial_read_bulk_callback, serial);
1146         /* Give this to the USB subsystem so it can tell us when more data
1147          * arrives. */
1148         result = usb_submit_urb(urb, GFP_ATOMIC);
1149         if (result) {
1150                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1151                         __func__, result);
1152         }
1153 }
1154
1155
1156
1157
1158 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1159 {
1160         int count;
1161         struct urb *curr_urb;
1162
1163         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1164                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1165                 count = put_rxbuf_data(curr_urb, serial);
1166                 if (count == -1)
1167                         return;
1168                 if (count == 0) {
1169                         serial->curr_rx_urb_idx++;
1170                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1171                                 serial->curr_rx_urb_idx = 0;
1172                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1173                 }
1174         }
1175 }
1176
1177 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1178 {
1179         int count = 0;
1180         struct urb *urb;
1181
1182         urb = serial->rx_urb[0];
1183         if (serial->open_count > 0) {
1184                 count = put_rxbuf_data(urb, serial);
1185                 if (count == -1)
1186                         return;
1187         }
1188         /* Re issue a read as long as we receive data. */
1189
1190         if (count == 0 && ((urb->actual_length != 0) ||
1191                            (serial->rx_state == RX_PENDING))) {
1192                 serial->rx_state = RX_SENT;
1193                 hso_mux_serial_read(serial);
1194         } else
1195                 serial->rx_state = RX_IDLE;
1196 }
1197
1198
1199 /* read callback for Diag and CS port */
1200 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1201 {
1202         struct hso_serial *serial = urb->context;
1203         int status = urb->status;
1204
1205         /* sanity check */
1206         if (!serial) {
1207                 D1("serial == NULL");
1208                 return;
1209         } else if (status) {
1210                 log_usb_status(status, __func__);
1211                 return;
1212         }
1213
1214         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1215         D1("Actual length = %d\n", urb->actual_length);
1216         DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218         /* Anyone listening? */
1219         if (serial->open_count == 0)
1220                 return;
1221
1222         if (status == 0) {
1223                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1224                         u32 rest;
1225                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1226                         rest =
1227                             urb->actual_length %
1228                             serial->in_endp->wMaxPacketSize;
1229                         if (((rest == 5) || (rest == 6)) &&
1230                             !memcmp(((u8 *) urb->transfer_buffer) +
1231                                     urb->actual_length - 4, crc_check, 4)) {
1232                                 urb->actual_length -= 4;
1233                         }
1234                 }
1235                 /* Valid data, handle RX data */
1236                 spin_lock(&serial->serial_lock);
1237                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1238                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1239                 spin_unlock(&serial->serial_lock);
1240         } else if (status == -ENOENT || status == -ECONNRESET) {
1241                 /* Unlinked - check for throttled port. */
1242                 D2("Port %d, successfully unlinked urb", serial->minor);
1243                 spin_lock(&serial->serial_lock);
1244                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1245                 hso_resubmit_rx_bulk_urb(serial, urb);
1246                 spin_unlock(&serial->serial_lock);
1247         } else {
1248                 D2("Port %d, status = %d for read urb", serial->minor, status);
1249                 return;
1250         }
1251 }
1252
1253 /*
1254  * This needs to be a tasklet otherwise we will
1255  * end up recursively calling this function.
1256  */
1257 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1258 {
1259         unsigned long flags;
1260
1261         spin_lock_irqsave(&serial->serial_lock, flags);
1262         if ((serial->parent->port_spec & HSO_INTF_MUX))
1263                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1264         else
1265                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1266         spin_unlock_irqrestore(&serial->serial_lock, flags);
1267 }
1268
1269 static  void hso_unthrottle(struct tty_struct *tty)
1270 {
1271         struct hso_serial *serial = get_serial_by_tty(tty);
1272
1273         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1274 }
1275
1276 static void hso_unthrottle_workfunc(struct work_struct *work)
1277 {
1278         struct hso_serial *serial =
1279             container_of(work, struct hso_serial,
1280                          retry_unthrottle_workqueue);
1281         hso_unthrottle_tasklet(serial);
1282 }
1283
1284 /* open the requested serial port */
1285 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1286 {
1287         struct hso_serial *serial = get_serial_by_index(tty->index);
1288         int result;
1289
1290         /* sanity check */
1291         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1292                 WARN_ON(1);
1293                 tty->driver_data = NULL;
1294                 D1("Failed to open port");
1295                 return -ENODEV;
1296         }
1297
1298         mutex_lock(&serial->parent->mutex);
1299         result = usb_autopm_get_interface(serial->parent->interface);
1300         if (result < 0)
1301                 goto err_out;
1302
1303         D1("Opening %d", serial->minor);
1304         kref_get(&serial->parent->ref);
1305
1306         /* setup */
1307         spin_lock_irq(&serial->serial_lock);
1308         tty->driver_data = serial;
1309         tty_kref_put(serial->tty);
1310         serial->tty = tty_kref_get(tty);
1311         spin_unlock_irq(&serial->serial_lock);
1312
1313         /* check for port already opened, if not set the termios */
1314         serial->open_count++;
1315         if (serial->open_count == 1) {
1316                 tty->low_latency = 1;
1317                 serial->rx_state = RX_IDLE;
1318                 /* Force default termio settings */
1319                 _hso_serial_set_termios(tty, NULL);
1320                 tasklet_init(&serial->unthrottle_tasklet,
1321                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1322                              (unsigned long)serial);
1323                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1324                           hso_unthrottle_workfunc);
1325                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1326                 if (result) {
1327                         hso_stop_serial_device(serial->parent);
1328                         serial->open_count--;
1329                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1330                 }
1331         } else {
1332                 D1("Port was already open");
1333         }
1334
1335         usb_autopm_put_interface(serial->parent->interface);
1336
1337         /* done */
1338         if (result)
1339                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1340 err_out:
1341         mutex_unlock(&serial->parent->mutex);
1342         return result;
1343 }
1344
1345 /* close the requested serial port */
1346 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1347 {
1348         struct hso_serial *serial = tty->driver_data;
1349         u8 usb_gone;
1350
1351         D1("Closing serial port");
1352
1353         /* Open failed, no close cleanup required */
1354         if (serial == NULL)
1355                 return;
1356
1357         mutex_lock(&serial->parent->mutex);
1358         usb_gone = serial->parent->usb_gone;
1359
1360         if (!usb_gone)
1361                 usb_autopm_get_interface(serial->parent->interface);
1362
1363         /* reset the rts and dtr */
1364         /* do the actual close */
1365         serial->open_count--;
1366
1367         if (serial->open_count <= 0) {
1368                 serial->open_count = 0;
1369                 spin_lock_irq(&serial->serial_lock);
1370                 if (serial->tty == tty) {
1371                         serial->tty->driver_data = NULL;
1372                         serial->tty = NULL;
1373                         tty_kref_put(tty);
1374                 }
1375                 spin_unlock_irq(&serial->serial_lock);
1376                 if (!usb_gone)
1377                         hso_stop_serial_device(serial->parent);
1378                 tasklet_kill(&serial->unthrottle_tasklet);
1379                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1380         }
1381
1382         if (!usb_gone)
1383                 usb_autopm_put_interface(serial->parent->interface);
1384
1385         mutex_unlock(&serial->parent->mutex);
1386
1387         kref_put(&serial->parent->ref, hso_serial_ref_free);
1388 }
1389
1390 /* close the requested serial port */
1391 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1392                             int count)
1393 {
1394         struct hso_serial *serial = get_serial_by_tty(tty);
1395         int space, tx_bytes;
1396         unsigned long flags;
1397
1398         /* sanity check */
1399         if (serial == NULL) {
1400                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1401                 return -ENODEV;
1402         }
1403
1404         spin_lock_irqsave(&serial->serial_lock, flags);
1405
1406         space = serial->tx_data_length - serial->tx_buffer_count;
1407         tx_bytes = (count < space) ? count : space;
1408
1409         if (!tx_bytes)
1410                 goto out;
1411
1412         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1413         serial->tx_buffer_count += tx_bytes;
1414
1415 out:
1416         spin_unlock_irqrestore(&serial->serial_lock, flags);
1417
1418         hso_kick_transmit(serial);
1419         /* done */
1420         return tx_bytes;
1421 }
1422
1423 /* how much room is there for writing */
1424 static int hso_serial_write_room(struct tty_struct *tty)
1425 {
1426         struct hso_serial *serial = get_serial_by_tty(tty);
1427         int room;
1428         unsigned long flags;
1429
1430         spin_lock_irqsave(&serial->serial_lock, flags);
1431         room = serial->tx_data_length - serial->tx_buffer_count;
1432         spin_unlock_irqrestore(&serial->serial_lock, flags);
1433
1434         /* return free room */
1435         return room;
1436 }
1437
1438 /* setup the term */
1439 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1440 {
1441         struct hso_serial *serial = get_serial_by_tty(tty);
1442         unsigned long flags;
1443
1444         if (old)
1445                 D5("Termios called with: cflags new[%d] - old[%d]",
1446                    tty->termios->c_cflag, old->c_cflag);
1447
1448         /* the actual setup */
1449         spin_lock_irqsave(&serial->serial_lock, flags);
1450         if (serial->open_count)
1451                 _hso_serial_set_termios(tty, old);
1452         else
1453                 tty->termios = old;
1454         spin_unlock_irqrestore(&serial->serial_lock, flags);
1455
1456         /* done */
1457         return;
1458 }
1459
1460 /* how many characters in the buffer */
1461 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1462 {
1463         struct hso_serial *serial = get_serial_by_tty(tty);
1464         int chars;
1465         unsigned long flags;
1466
1467         /* sanity check */
1468         if (serial == NULL)
1469                 return 0;
1470
1471         spin_lock_irqsave(&serial->serial_lock, flags);
1472         chars = serial->tx_buffer_count;
1473         spin_unlock_irqrestore(&serial->serial_lock, flags);
1474
1475         return chars;
1476 }
1477 static int tiocmget_submit_urb(struct hso_serial *serial,
1478                                struct hso_tiocmget *tiocmget,
1479                                struct usb_device *usb)
1480 {
1481         int result;
1482
1483         if (serial->parent->usb_gone)
1484                 return -ENODEV;
1485         usb_fill_int_urb(tiocmget->urb, usb,
1486                          usb_rcvintpipe(usb,
1487                                         tiocmget->endp->
1488                                         bEndpointAddress & 0x7F),
1489                          &tiocmget->serial_state_notification,
1490                          sizeof(struct hso_serial_state_notification),
1491                          tiocmget_intr_callback, serial,
1492                          tiocmget->endp->bInterval);
1493         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1494         if (result) {
1495                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1496                          result);
1497         }
1498         return result;
1499
1500 }
1501
1502 static void tiocmget_intr_callback(struct urb *urb)
1503 {
1504         struct hso_serial *serial = urb->context;
1505         struct hso_tiocmget *tiocmget;
1506         int status = urb->status;
1507         u16 UART_state_bitmap, prev_UART_state_bitmap;
1508         struct uart_icount *icount;
1509         struct hso_serial_state_notification *serial_state_notification;
1510         struct usb_device *usb;
1511
1512         /* Sanity checks */
1513         if (!serial)
1514                 return;
1515         if (status) {
1516                 log_usb_status(status, __func__);
1517                 return;
1518         }
1519         tiocmget = serial->tiocmget;
1520         if (!tiocmget)
1521                 return;
1522         usb = serial->parent->usb;
1523         serial_state_notification = &tiocmget->serial_state_notification;
1524         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1525             serial_state_notification->bNotification != B_NOTIFICATION ||
1526             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1527             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1528             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1529                 dev_warn(&usb->dev,
1530                          "hso received invalid serial state notification\n");
1531                 DUMP(serial_state_notification,
1532                      sizeof(struct hso_serial_state_notification));
1533         } else {
1534
1535                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1536                                                 UART_state_bitmap);
1537                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1538                 icount = &tiocmget->icount;
1539                 spin_lock(&serial->serial_lock);
1540                 if ((UART_state_bitmap & B_OVERRUN) !=
1541                    (prev_UART_state_bitmap & B_OVERRUN))
1542                         icount->parity++;
1543                 if ((UART_state_bitmap & B_PARITY) !=
1544                    (prev_UART_state_bitmap & B_PARITY))
1545                         icount->parity++;
1546                 if ((UART_state_bitmap & B_FRAMING) !=
1547                    (prev_UART_state_bitmap & B_FRAMING))
1548                         icount->frame++;
1549                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1550                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1551                         icount->rng++;
1552                 if ((UART_state_bitmap & B_BREAK) !=
1553                    (prev_UART_state_bitmap & B_BREAK))
1554                         icount->brk++;
1555                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1556                    (prev_UART_state_bitmap & B_TX_CARRIER))
1557                         icount->dsr++;
1558                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1559                    (prev_UART_state_bitmap & B_RX_CARRIER))
1560                         icount->dcd++;
1561                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1562                 spin_unlock(&serial->serial_lock);
1563                 tiocmget->intr_completed = 1;
1564                 wake_up_interruptible(&tiocmget->waitq);
1565         }
1566         memset(serial_state_notification, 0,
1567                sizeof(struct hso_serial_state_notification));
1568         tiocmget_submit_urb(serial,
1569                             tiocmget,
1570                             serial->parent->usb);
1571 }
1572
1573 /*
1574  * next few functions largely stolen from drivers/serial/serial_core.c
1575  */
1576 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1577  * - mask passed in arg for lines of interest
1578  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1579  * Caller should use TIOCGICOUNT to see which one it was
1580  */
1581 static int
1582 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1583 {
1584         DECLARE_WAITQUEUE(wait, current);
1585         struct uart_icount cprev, cnow;
1586         struct hso_tiocmget  *tiocmget;
1587         int ret;
1588
1589         tiocmget = serial->tiocmget;
1590         if (!tiocmget)
1591                 return -ENOENT;
1592         /*
1593          * note the counters on entry
1594          */
1595         spin_lock_irq(&serial->serial_lock);
1596         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1597         spin_unlock_irq(&serial->serial_lock);
1598         add_wait_queue(&tiocmget->waitq, &wait);
1599         for (;;) {
1600                 spin_lock_irq(&serial->serial_lock);
1601                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1602                 spin_unlock_irq(&serial->serial_lock);
1603                 set_current_state(TASK_INTERRUPTIBLE);
1604                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1605                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1606                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1607                         ret = 0;
1608                         break;
1609                 }
1610                 schedule();
1611                 /* see if a signal did it */
1612                 if (signal_pending(current)) {
1613                         ret = -ERESTARTSYS;
1614                         break;
1615                 }
1616                 cprev = cnow;
1617         }
1618         current->state = TASK_RUNNING;
1619         remove_wait_queue(&tiocmget->waitq, &wait);
1620
1621         return ret;
1622 }
1623
1624 /*
1625  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1626  * Return: write counters to the user passed counter struct
1627  * NB: both 1->0 and 0->1 transitions are counted except for
1628  *     RI where only 0->1 is counted.
1629  */
1630 static int hso_get_count(struct hso_serial *serial,
1631                           struct serial_icounter_struct __user *icnt)
1632 {
1633         struct serial_icounter_struct icount;
1634         struct uart_icount cnow;
1635         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1636
1637         if (!tiocmget)
1638                  return -ENOENT;
1639         spin_lock_irq(&serial->serial_lock);
1640         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1641         spin_unlock_irq(&serial->serial_lock);
1642
1643         icount.cts         = cnow.cts;
1644         icount.dsr         = cnow.dsr;
1645         icount.rng         = cnow.rng;
1646         icount.dcd         = cnow.dcd;
1647         icount.rx          = cnow.rx;
1648         icount.tx          = cnow.tx;
1649         icount.frame       = cnow.frame;
1650         icount.overrun     = cnow.overrun;
1651         icount.parity      = cnow.parity;
1652         icount.brk         = cnow.brk;
1653         icount.buf_overrun = cnow.buf_overrun;
1654
1655         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1656 }
1657
1658
1659 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1660 {
1661         int retval;
1662         struct hso_serial *serial = get_serial_by_tty(tty);
1663         struct hso_tiocmget  *tiocmget;
1664         u16 UART_state_bitmap;
1665
1666         /* sanity check */
1667         if (!serial) {
1668                 D1("no tty structures");
1669                 return -EINVAL;
1670         }
1671         spin_lock_irq(&serial->serial_lock);
1672         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1673             ((serial->dtr_state) ? TIOCM_DTR : 0);
1674         tiocmget = serial->tiocmget;
1675         if (tiocmget) {
1676
1677                 UART_state_bitmap = le16_to_cpu(
1678                         tiocmget->prev_UART_state_bitmap);
1679                 if (UART_state_bitmap & B_RING_SIGNAL)
1680                         retval |=  TIOCM_RNG;
1681                 if (UART_state_bitmap & B_RX_CARRIER)
1682                         retval |=  TIOCM_CD;
1683                 if (UART_state_bitmap & B_TX_CARRIER)
1684                         retval |=  TIOCM_DSR;
1685         }
1686         spin_unlock_irq(&serial->serial_lock);
1687         return retval;
1688 }
1689
1690 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1691                                unsigned int set, unsigned int clear)
1692 {
1693         int val = 0;
1694         unsigned long flags;
1695         int if_num;
1696         struct hso_serial *serial = get_serial_by_tty(tty);
1697
1698         /* sanity check */
1699         if (!serial) {
1700                 D1("no tty structures");
1701                 return -EINVAL;
1702         }
1703         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1704
1705         spin_lock_irqsave(&serial->serial_lock, flags);
1706         if (set & TIOCM_RTS)
1707                 serial->rts_state = 1;
1708         if (set & TIOCM_DTR)
1709                 serial->dtr_state = 1;
1710
1711         if (clear & TIOCM_RTS)
1712                 serial->rts_state = 0;
1713         if (clear & TIOCM_DTR)
1714                 serial->dtr_state = 0;
1715
1716         if (serial->dtr_state)
1717                 val |= 0x01;
1718         if (serial->rts_state)
1719                 val |= 0x02;
1720
1721         spin_unlock_irqrestore(&serial->serial_lock, flags);
1722
1723         return usb_control_msg(serial->parent->usb,
1724                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1725                                0x21, val, if_num, NULL, 0,
1726                                USB_CTRL_SET_TIMEOUT);
1727 }
1728
1729 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1730                             unsigned int cmd, unsigned long arg)
1731 {
1732         struct hso_serial *serial =  get_serial_by_tty(tty);
1733         void __user *uarg = (void __user *)arg;
1734         int ret = 0;
1735         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1736
1737         if (!serial)
1738                 return -ENODEV;
1739         switch (cmd) {
1740         case TIOCMIWAIT:
1741                 ret = hso_wait_modem_status(serial, arg);
1742                 break;
1743
1744         case TIOCGICOUNT:
1745                 ret = hso_get_count(serial, uarg);
1746                 break;
1747         default:
1748                 ret = -ENOIOCTLCMD;
1749                 break;
1750         }
1751         return ret;
1752 }
1753
1754
1755 /* starts a transmit */
1756 static void hso_kick_transmit(struct hso_serial *serial)
1757 {
1758         u8 *temp;
1759         unsigned long flags;
1760         int res;
1761
1762         spin_lock_irqsave(&serial->serial_lock, flags);
1763         if (!serial->tx_buffer_count)
1764                 goto out;
1765
1766         if (serial->tx_urb_used)
1767                 goto out;
1768
1769         /* Wakeup USB interface if necessary */
1770         if (hso_get_activity(serial->parent) == -EAGAIN)
1771                 goto out;
1772
1773         /* Switch pointers around to avoid memcpy */
1774         temp = serial->tx_buffer;
1775         serial->tx_buffer = serial->tx_data;
1776         serial->tx_data = temp;
1777         serial->tx_data_count = serial->tx_buffer_count;
1778         serial->tx_buffer_count = 0;
1779
1780         /* If temp is set, it means we switched buffers */
1781         if (temp && serial->write_data) {
1782                 res = serial->write_data(serial);
1783                 if (res >= 0)
1784                         serial->tx_urb_used = 1;
1785         }
1786 out:
1787         spin_unlock_irqrestore(&serial->serial_lock, flags);
1788 }
1789
1790 /* make a request (for reading and writing data to muxed serial port) */
1791 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1792                               struct urb *ctrl_urb,
1793                               struct usb_ctrlrequest *ctrl_req,
1794                               u8 *ctrl_urb_data, u32 size)
1795 {
1796         int result;
1797         int pipe;
1798
1799         /* Sanity check */
1800         if (!serial || !ctrl_urb || !ctrl_req) {
1801                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1802                 return -EINVAL;
1803         }
1804
1805         /* initialize */
1806         ctrl_req->wValue = 0;
1807         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1808         ctrl_req->wLength = cpu_to_le16(size);
1809
1810         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1811                 /* Reading command */
1812                 ctrl_req->bRequestType = USB_DIR_IN |
1813                                          USB_TYPE_OPTION_VENDOR |
1814                                          USB_RECIP_INTERFACE;
1815                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1816                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1817         } else {
1818                 /* Writing command */
1819                 ctrl_req->bRequestType = USB_DIR_OUT |
1820                                          USB_TYPE_OPTION_VENDOR |
1821                                          USB_RECIP_INTERFACE;
1822                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1823                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1824         }
1825         /* syslog */
1826         D2("%s command (%02x) len: %d, port: %d",
1827            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1828            ctrl_req->bRequestType, ctrl_req->wLength, port);
1829
1830         /* Load ctrl urb */
1831         ctrl_urb->transfer_flags = 0;
1832         usb_fill_control_urb(ctrl_urb,
1833                              serial->parent->usb,
1834                              pipe,
1835                              (u8 *) ctrl_req,
1836                              ctrl_urb_data, size, ctrl_callback, serial);
1837         /* Send it on merry way */
1838         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1839         if (result) {
1840                 dev_err(&ctrl_urb->dev->dev,
1841                         "%s failed submit ctrl_urb %d type %d", __func__,
1842                         result, type);
1843                 return result;
1844         }
1845
1846         /* done */
1847         return size;
1848 }
1849
1850 /* called by intr_callback when read occurs */
1851 static int hso_mux_serial_read(struct hso_serial *serial)
1852 {
1853         if (!serial)
1854                 return -EINVAL;
1855
1856         /* clean data */
1857         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1858         /* make the request */
1859
1860         if (serial->num_rx_urbs != 1) {
1861                 dev_err(&serial->parent->interface->dev,
1862                         "ERROR: mux'd reads with multiple buffers "
1863                         "not possible\n");
1864                 return 0;
1865         }
1866         return mux_device_request(serial,
1867                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1868                                   serial->parent->port_spec & HSO_PORT_MASK,
1869                                   serial->rx_urb[0],
1870                                   &serial->ctrl_req_rx,
1871                                   serial->rx_data[0], serial->rx_data_length);
1872 }
1873
1874 /* used for muxed serial port callback (muxed serial read) */
1875 static void intr_callback(struct urb *urb)
1876 {
1877         struct hso_shared_int *shared_int = urb->context;
1878         struct hso_serial *serial;
1879         unsigned char *port_req;
1880         int status = urb->status;
1881         int i;
1882
1883         usb_mark_last_busy(urb->dev);
1884
1885         /* sanity check */
1886         if (!shared_int)
1887                 return;
1888
1889         /* status check */
1890         if (status) {
1891                 log_usb_status(status, __func__);
1892                 return;
1893         }
1894         D4("\n--- Got intr callback 0x%02X ---", status);
1895
1896         /* what request? */
1897         port_req = urb->transfer_buffer;
1898         D4(" port_req = 0x%.2X\n", *port_req);
1899         /* loop over all muxed ports to find the one sending this */
1900         for (i = 0; i < 8; i++) {
1901                 /* max 8 channels on MUX */
1902                 if (*port_req & (1 << i)) {
1903                         serial = get_serial_by_shared_int_and_type(shared_int,
1904                                                                    (1 << i));
1905                         if (serial != NULL) {
1906                                 D1("Pending read interrupt on port %d\n", i);
1907                                 spin_lock(&serial->serial_lock);
1908                                 if (serial->rx_state == RX_IDLE) {
1909                                         /* Setup and send a ctrl req read on
1910                                          * port i */
1911                                 if (!serial->rx_urb_filled[0]) {
1912                                                 serial->rx_state = RX_SENT;
1913                                                 hso_mux_serial_read(serial);
1914                                         } else
1915                                                 serial->rx_state = RX_PENDING;
1916
1917                                 } else {
1918                                         D1("Already pending a read on "
1919                                            "port %d\n", i);
1920                                 }
1921                                 spin_unlock(&serial->serial_lock);
1922                         }
1923                 }
1924         }
1925         /* Resubmit interrupt urb */
1926         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1927 }
1928
1929 /* called for writing to muxed serial port */
1930 static int hso_mux_serial_write_data(struct hso_serial *serial)
1931 {
1932         if (NULL == serial)
1933                 return -EINVAL;
1934
1935         return mux_device_request(serial,
1936                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1937                                   serial->parent->port_spec & HSO_PORT_MASK,
1938                                   serial->tx_urb,
1939                                   &serial->ctrl_req_tx,
1940                                   serial->tx_data, serial->tx_data_count);
1941 }
1942
1943 /* write callback for Diag and CS port */
1944 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1945 {
1946         struct hso_serial *serial = urb->context;
1947         int status = urb->status;
1948         struct tty_struct *tty;
1949
1950         /* sanity check */
1951         if (!serial) {
1952                 D1("serial == NULL");
1953                 return;
1954         }
1955
1956         spin_lock(&serial->serial_lock);
1957         serial->tx_urb_used = 0;
1958         tty = tty_kref_get(serial->tty);
1959         spin_unlock(&serial->serial_lock);
1960         if (status) {
1961                 log_usb_status(status, __func__);
1962                 tty_kref_put(tty);
1963                 return;
1964         }
1965         hso_put_activity(serial->parent);
1966         if (tty) {
1967                 tty_wakeup(tty);
1968                 tty_kref_put(tty);
1969         }
1970         hso_kick_transmit(serial);
1971
1972         D1(" ");
1973         return;
1974 }
1975
1976 /* called for writing diag or CS serial port */
1977 static int hso_std_serial_write_data(struct hso_serial *serial)
1978 {
1979         int count = serial->tx_data_count;
1980         int result;
1981
1982         usb_fill_bulk_urb(serial->tx_urb,
1983                           serial->parent->usb,
1984                           usb_sndbulkpipe(serial->parent->usb,
1985                                           serial->out_endp->
1986                                           bEndpointAddress & 0x7F),
1987                           serial->tx_data, serial->tx_data_count,
1988                           hso_std_serial_write_bulk_callback, serial);
1989
1990         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1991         if (result) {
1992                 dev_warn(&serial->parent->usb->dev,
1993                          "Failed to submit urb - res %d\n", result);
1994                 return result;
1995         }
1996
1997         return count;
1998 }
1999
2000 /* callback after read or write on muxed serial port */
2001 static void ctrl_callback(struct urb *urb)
2002 {
2003         struct hso_serial *serial = urb->context;
2004         struct usb_ctrlrequest *req;
2005         int status = urb->status;
2006         struct tty_struct *tty;
2007
2008         /* sanity check */
2009         if (!serial)
2010                 return;
2011
2012         spin_lock(&serial->serial_lock);
2013         serial->tx_urb_used = 0;
2014         tty = tty_kref_get(serial->tty);
2015         spin_unlock(&serial->serial_lock);
2016         if (status) {
2017                 log_usb_status(status, __func__);
2018                 tty_kref_put(tty);
2019                 return;
2020         }
2021
2022         /* what request? */
2023         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2024         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2025         D4("Actual length of urb = %d\n", urb->actual_length);
2026         DUMP1(urb->transfer_buffer, urb->actual_length);
2027
2028         if (req->bRequestType ==
2029             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2030                 /* response to a read command */
2031                 serial->rx_urb_filled[0] = 1;
2032                 spin_lock(&serial->serial_lock);
2033                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2034                 spin_unlock(&serial->serial_lock);
2035         } else {
2036                 hso_put_activity(serial->parent);
2037                 if (tty)
2038                         tty_wakeup(tty);
2039                 /* response to a write command */
2040                 hso_kick_transmit(serial);
2041         }
2042         tty_kref_put(tty);
2043 }
2044
2045 /* handle RX data for serial port */
2046 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2047 {
2048         struct tty_struct *tty;
2049         int write_length_remaining = 0;
2050         int curr_write_len;
2051
2052         /* Sanity check */
2053         if (urb == NULL || serial == NULL) {
2054                 D1("serial = NULL");
2055                 return -2;
2056         }
2057
2058         /* All callers to put_rxbuf_data hold serial_lock */
2059         tty = tty_kref_get(serial->tty);
2060
2061         /* Push data to tty */
2062         if (tty) {
2063                 write_length_remaining = urb->actual_length -
2064                         serial->curr_rx_urb_offset;
2065                 D1("data to push to tty");
2066                 while (write_length_remaining) {
2067                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2068                                 tty_kref_put(tty);
2069                                 return -1;
2070                         }
2071                         curr_write_len =  tty_insert_flip_string
2072                                 (tty, urb->transfer_buffer +
2073                                  serial->curr_rx_urb_offset,
2074                                  write_length_remaining);
2075                         serial->curr_rx_urb_offset += curr_write_len;
2076                         write_length_remaining -= curr_write_len;
2077                         tty_flip_buffer_push(tty);
2078                 }
2079         }
2080         if (write_length_remaining == 0) {
2081                 serial->curr_rx_urb_offset = 0;
2082                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2083         }
2084         tty_kref_put(tty);
2085         return write_length_remaining;
2086 }
2087
2088
2089 /* Base driver functions */
2090
2091 static void hso_log_port(struct hso_device *hso_dev)
2092 {
2093         char *port_type;
2094         char port_dev[20];
2095
2096         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2097         case HSO_PORT_CONTROL:
2098                 port_type = "Control";
2099                 break;
2100         case HSO_PORT_APP:
2101                 port_type = "Application";
2102                 break;
2103         case HSO_PORT_GPS:
2104                 port_type = "GPS";
2105                 break;
2106         case HSO_PORT_GPS_CONTROL:
2107                 port_type = "GPS control";
2108                 break;
2109         case HSO_PORT_APP2:
2110                 port_type = "Application2";
2111                 break;
2112         case HSO_PORT_PCSC:
2113                 port_type = "PCSC";
2114                 break;
2115         case HSO_PORT_DIAG:
2116                 port_type = "Diagnostic";
2117                 break;
2118         case HSO_PORT_DIAG2:
2119                 port_type = "Diagnostic2";
2120                 break;
2121         case HSO_PORT_MODEM:
2122                 port_type = "Modem";
2123                 break;
2124         case HSO_PORT_NETWORK:
2125                 port_type = "Network";
2126                 break;
2127         default:
2128                 port_type = "Unknown";
2129                 break;
2130         }
2131         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2132                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2133         } else
2134                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2135                         dev2ser(hso_dev)->minor);
2136
2137         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2138                 port_type, port_dev);
2139 }
2140
2141 static int hso_start_net_device(struct hso_device *hso_dev)
2142 {
2143         int i, result = 0;
2144         struct hso_net *hso_net = dev2net(hso_dev);
2145
2146         if (!hso_net)
2147                 return -ENODEV;
2148
2149         /* send URBs for all read buffers */
2150         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2151
2152                 /* Prep a receive URB */
2153                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2154                                   hso_dev->usb,
2155                                   usb_rcvbulkpipe(hso_dev->usb,
2156                                                   hso_net->in_endp->
2157                                                   bEndpointAddress & 0x7F),
2158                                   hso_net->mux_bulk_rx_buf_pool[i],
2159                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2160                                   hso_net);
2161
2162                 /* Put it out there so the device can send us stuff */
2163                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2164                                         GFP_NOIO);
2165                 if (result)
2166                         dev_warn(&hso_dev->usb->dev,
2167                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2168                                 i, result);
2169         }
2170
2171         return result;
2172 }
2173
2174 static int hso_stop_net_device(struct hso_device *hso_dev)
2175 {
2176         int i;
2177         struct hso_net *hso_net = dev2net(hso_dev);
2178
2179         if (!hso_net)
2180                 return -ENODEV;
2181
2182         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2183                 if (hso_net->mux_bulk_rx_urb_pool[i])
2184                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2185
2186         }
2187         if (hso_net->mux_bulk_tx_urb)
2188                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2189
2190         return 0;
2191 }
2192
2193 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2194 {
2195         int i, result = 0;
2196         struct hso_serial *serial = dev2ser(hso_dev);
2197
2198         if (!serial)
2199                 return -ENODEV;
2200
2201         /* If it is not the MUX port fill in and submit a bulk urb (already
2202          * allocated in hso_serial_start) */
2203         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2204                 for (i = 0; i < serial->num_rx_urbs; i++) {
2205                         usb_fill_bulk_urb(serial->rx_urb[i],
2206                                           serial->parent->usb,
2207                                           usb_rcvbulkpipe(serial->parent->usb,
2208                                                           serial->in_endp->
2209                                                           bEndpointAddress &
2210                                                           0x7F),
2211                                           serial->rx_data[i],
2212                                           serial->rx_data_length,
2213                                           hso_std_serial_read_bulk_callback,
2214                                           serial);
2215                         result = usb_submit_urb(serial->rx_urb[i], flags);
2216                         if (result) {
2217                                 dev_warn(&serial->parent->usb->dev,
2218                                          "Failed to submit urb - res %d\n",
2219                                          result);
2220                                 break;
2221                         }
2222                 }
2223         } else {
2224                 mutex_lock(&serial->shared_int->shared_int_lock);
2225                 if (!serial->shared_int->use_count) {
2226                         result =
2227                             hso_mux_submit_intr_urb(serial->shared_int,
2228                                                     hso_dev->usb, flags);
2229                 }
2230                 serial->shared_int->use_count++;
2231                 mutex_unlock(&serial->shared_int->shared_int_lock);
2232         }
2233         if (serial->tiocmget)
2234                 tiocmget_submit_urb(serial,
2235                                     serial->tiocmget,
2236                                     serial->parent->usb);
2237         return result;
2238 }
2239
2240 static int hso_stop_serial_device(struct hso_device *hso_dev)
2241 {
2242         int i;
2243         struct hso_serial *serial = dev2ser(hso_dev);
2244         struct hso_tiocmget  *tiocmget;
2245
2246         if (!serial)
2247                 return -ENODEV;
2248
2249         for (i = 0; i < serial->num_rx_urbs; i++) {
2250                 if (serial->rx_urb[i]) {
2251                                 usb_kill_urb(serial->rx_urb[i]);
2252                                 serial->rx_urb_filled[i] = 0;
2253                 }
2254         }
2255         serial->curr_rx_urb_idx = 0;
2256         serial->curr_rx_urb_offset = 0;
2257
2258         if (serial->tx_urb)
2259                 usb_kill_urb(serial->tx_urb);
2260
2261         if (serial->shared_int) {
2262                 mutex_lock(&serial->shared_int->shared_int_lock);
2263                 if (serial->shared_int->use_count &&
2264                     (--serial->shared_int->use_count == 0)) {
2265                         struct urb *urb;
2266
2267                         urb = serial->shared_int->shared_intr_urb;
2268                         if (urb)
2269                                 usb_kill_urb(urb);
2270                 }
2271                 mutex_unlock(&serial->shared_int->shared_int_lock);
2272         }
2273         tiocmget = serial->tiocmget;
2274         if (tiocmget) {
2275                 wake_up_interruptible(&tiocmget->waitq);
2276                 usb_kill_urb(tiocmget->urb);
2277         }
2278
2279         return 0;
2280 }
2281
2282 static void hso_serial_common_free(struct hso_serial *serial)
2283 {
2284         int i;
2285
2286         if (serial->parent->dev)
2287                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2288
2289         tty_unregister_device(tty_drv, serial->minor);
2290
2291         for (i = 0; i < serial->num_rx_urbs; i++) {
2292                 /* unlink and free RX URB */
2293                 usb_free_urb(serial->rx_urb[i]);
2294                 /* free the RX buffer */
2295                 kfree(serial->rx_data[i]);
2296         }
2297
2298         /* unlink and free TX URB */
2299         usb_free_urb(serial->tx_urb);
2300         kfree(serial->tx_data);
2301 }
2302
2303 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2304                                     int rx_size, int tx_size)
2305 {
2306         struct device *dev;
2307         int minor;
2308         int i;
2309
2310         minor = get_free_serial_index();
2311         if (minor < 0)
2312                 goto exit;
2313
2314         /* register our minor number */
2315         serial->parent->dev = tty_register_device(tty_drv, minor,
2316                                         &serial->parent->interface->dev);
2317         dev = serial->parent->dev;
2318         dev_set_drvdata(dev, serial->parent);
2319         i = device_create_file(dev, &dev_attr_hsotype);
2320
2321         /* fill in specific data for later use */
2322         serial->minor = minor;
2323         serial->magic = HSO_SERIAL_MAGIC;
2324         spin_lock_init(&serial->serial_lock);
2325         serial->num_rx_urbs = num_urbs;
2326
2327         /* RX, allocate urb and initialize */
2328
2329         /* prepare our RX buffer */
2330         serial->rx_data_length = rx_size;
2331         for (i = 0; i < serial->num_rx_urbs; i++) {
2332                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2333                 if (!serial->rx_urb[i]) {
2334                         dev_err(dev, "Could not allocate urb?\n");
2335                         goto exit;
2336                 }
2337                 serial->rx_urb[i]->transfer_buffer = NULL;
2338                 serial->rx_urb[i]->transfer_buffer_length = 0;
2339                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2340                                              GFP_KERNEL);
2341                 if (!serial->rx_data[i]) {
2342                         dev_err(dev, "%s - Out of memory\n", __func__);
2343                         goto exit;
2344                 }
2345         }
2346
2347         /* TX, allocate urb and initialize */
2348         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2349         if (!serial->tx_urb) {
2350                 dev_err(dev, "Could not allocate urb?\n");
2351                 goto exit;
2352         }
2353         serial->tx_urb->transfer_buffer = NULL;
2354         serial->tx_urb->transfer_buffer_length = 0;
2355         /* prepare our TX buffer */
2356         serial->tx_data_count = 0;
2357         serial->tx_buffer_count = 0;
2358         serial->tx_data_length = tx_size;
2359         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2360         if (!serial->tx_data) {
2361                 dev_err(dev, "%s - Out of memory", __func__);
2362                 goto exit;
2363         }
2364         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2365         if (!serial->tx_buffer) {
2366                 dev_err(dev, "%s - Out of memory", __func__);
2367                 goto exit;
2368         }
2369
2370         return 0;
2371 exit:
2372         hso_serial_common_free(serial);
2373         return -1;
2374 }
2375
2376 /* Creates a general hso device */
2377 static struct hso_device *hso_create_device(struct usb_interface *intf,
2378                                             int port_spec)
2379 {
2380         struct hso_device *hso_dev;
2381
2382         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2383         if (!hso_dev)
2384                 return NULL;
2385
2386         hso_dev->port_spec = port_spec;
2387         hso_dev->usb = interface_to_usbdev(intf);
2388         hso_dev->interface = intf;
2389         kref_init(&hso_dev->ref);
2390         mutex_init(&hso_dev->mutex);
2391
2392         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2393         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2394
2395         return hso_dev;
2396 }
2397
2398 /* Removes a network device in the network device table */
2399 static int remove_net_device(struct hso_device *hso_dev)
2400 {
2401         int i;
2402
2403         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2404                 if (network_table[i] == hso_dev) {
2405                         network_table[i] = NULL;
2406                         break;
2407                 }
2408         }
2409         if (i == HSO_MAX_NET_DEVICES)
2410                 return -1;
2411         return 0;
2412 }
2413
2414 /* Frees our network device */
2415 static void hso_free_net_device(struct hso_device *hso_dev)
2416 {
2417         int i;
2418         struct hso_net *hso_net = dev2net(hso_dev);
2419
2420         if (!hso_net)
2421                 return;
2422
2423         remove_net_device(hso_net->parent);
2424
2425         if (hso_net->net) {
2426                 unregister_netdev(hso_net->net);
2427                 free_netdev(hso_net->net);
2428         }
2429
2430         /* start freeing */
2431         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2432                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2433                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2434                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2435         }
2436         usb_free_urb(hso_net->mux_bulk_tx_urb);
2437         kfree(hso_net->mux_bulk_tx_buf);
2438         hso_net->mux_bulk_tx_buf = NULL;
2439
2440         kfree(hso_dev);
2441 }
2442
2443 static const struct net_device_ops hso_netdev_ops = {
2444         .ndo_open       = hso_net_open,
2445         .ndo_stop       = hso_net_close,
2446         .ndo_start_xmit = hso_net_start_xmit,
2447         .ndo_tx_timeout = hso_net_tx_timeout,
2448 };
2449
2450 /* initialize the network interface */
2451 static void hso_net_init(struct net_device *net)
2452 {
2453         struct hso_net *hso_net = netdev_priv(net);
2454
2455         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2456
2457         /* fill in the other fields */
2458         net->netdev_ops = &hso_netdev_ops;
2459         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2460         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2461         net->type = ARPHRD_NONE;
2462         net->mtu = DEFAULT_MTU - 14;
2463         net->tx_queue_len = 10;
2464         SET_ETHTOOL_OPS(net, &ops);
2465
2466         /* and initialize the semaphore */
2467         spin_lock_init(&hso_net->net_lock);
2468 }
2469
2470 /* Adds a network device in the network device table */
2471 static int add_net_device(struct hso_device *hso_dev)
2472 {
2473         int i;
2474
2475         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2476                 if (network_table[i] == NULL) {
2477                         network_table[i] = hso_dev;
2478                         break;
2479                 }
2480         }
2481         if (i == HSO_MAX_NET_DEVICES)
2482                 return -1;
2483         return 0;
2484 }
2485
2486 static int hso_rfkill_set_block(void *data, bool blocked)
2487 {
2488         struct hso_device *hso_dev = data;
2489         int enabled = !blocked;
2490         int rv;
2491
2492         mutex_lock(&hso_dev->mutex);
2493         if (hso_dev->usb_gone)
2494                 rv = 0;
2495         else
2496                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2497                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2498                                        USB_CTRL_SET_TIMEOUT);
2499         mutex_unlock(&hso_dev->mutex);
2500         return rv;
2501 }
2502
2503 static const struct rfkill_ops hso_rfkill_ops = {
2504         .set_block = hso_rfkill_set_block,
2505 };
2506
2507 /* Creates and sets up everything for rfkill */
2508 static void hso_create_rfkill(struct hso_device *hso_dev,
2509                              struct usb_interface *interface)
2510 {
2511         struct hso_net *hso_net = dev2net(hso_dev);
2512         struct device *dev = &hso_net->net->dev;
2513         char *rfkn;
2514
2515         rfkn = kzalloc(20, GFP_KERNEL);
2516         if (!rfkn)
2517                 dev_err(dev, "%s - Out of memory\n", __func__);
2518
2519         snprintf(rfkn, 20, "hso-%d",
2520                  interface->altsetting->desc.bInterfaceNumber);
2521
2522         hso_net->rfkill = rfkill_alloc(rfkn,
2523                                        &interface_to_usbdev(interface)->dev,
2524                                        RFKILL_TYPE_WWAN,
2525                                        &hso_rfkill_ops, hso_dev);
2526         if (!hso_net->rfkill) {
2527                 dev_err(dev, "%s - Out of memory\n", __func__);
2528                 kfree(rfkn);
2529                 return;
2530         }
2531         if (rfkill_register(hso_net->rfkill) < 0) {
2532                 rfkill_destroy(hso_net->rfkill);
2533                 kfree(rfkn);
2534                 hso_net->rfkill = NULL;
2535                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2536                 return;
2537         }
2538 }
2539
2540 static struct device_type hso_type = {
2541         .name   = "wwan",
2542 };
2543
2544 /* Creates our network device */
2545 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2546                                                 int port_spec)
2547 {
2548         int result, i;
2549         struct net_device *net;
2550         struct hso_net *hso_net;
2551         struct hso_device *hso_dev;
2552
2553         hso_dev = hso_create_device(interface, port_spec);
2554         if (!hso_dev)
2555                 return NULL;
2556
2557         /* allocate our network device, then we can put in our private data */
2558         /* call hso_net_init to do the basic initialization */
2559         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2560         if (!net) {
2561                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2562                 goto exit;
2563         }
2564
2565         hso_net = netdev_priv(net);
2566
2567         hso_dev->port_data.dev_net = hso_net;
2568         hso_net->net = net;
2569         hso_net->parent = hso_dev;
2570
2571         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2572                                       USB_DIR_IN);
2573         if (!hso_net->in_endp) {
2574                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2575                 goto exit;
2576         }
2577         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2578                                        USB_DIR_OUT);
2579         if (!hso_net->out_endp) {
2580                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2581                 goto exit;
2582         }
2583         SET_NETDEV_DEV(net, &interface->dev);
2584         SET_NETDEV_DEVTYPE(net, &hso_type);
2585
2586         /* registering our net device */
2587         result = register_netdev(net);
2588         if (result) {
2589                 dev_err(&interface->dev, "Failed to register device\n");
2590                 goto exit;
2591         }
2592
2593         /* start allocating */
2594         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2595                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2596                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2597                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2598                         goto exit;
2599                 }
2600                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2601                                                            GFP_KERNEL);
2602                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2603                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2604                         goto exit;
2605                 }
2606         }
2607         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2608         if (!hso_net->mux_bulk_tx_urb) {
2609                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2610                 goto exit;
2611         }
2612         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2613         if (!hso_net->mux_bulk_tx_buf) {
2614                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2615                 goto exit;
2616         }
2617
2618         add_net_device(hso_dev);
2619
2620         hso_log_port(hso_dev);
2621
2622         hso_create_rfkill(hso_dev, interface);
2623
2624         return hso_dev;
2625 exit:
2626         hso_free_net_device(hso_dev);
2627         return NULL;
2628 }
2629
2630 static void hso_free_tiomget(struct hso_serial *serial)
2631 {
2632         struct hso_tiocmget *tiocmget = serial->tiocmget;
2633         if (tiocmget) {
2634                 if (tiocmget->urb) {
2635                         usb_free_urb(tiocmget->urb);
2636                         tiocmget->urb = NULL;
2637                 }
2638                 serial->tiocmget = NULL;
2639                 kfree(tiocmget);
2640
2641         }
2642 }
2643
2644 /* Frees an AT channel ( goes for both mux and non-mux ) */
2645 static void hso_free_serial_device(struct hso_device *hso_dev)
2646 {
2647         struct hso_serial *serial = dev2ser(hso_dev);
2648
2649         if (!serial)
2650                 return;
2651         set_serial_by_index(serial->minor, NULL);
2652
2653         hso_serial_common_free(serial);
2654
2655         if (serial->shared_int) {
2656                 mutex_lock(&serial->shared_int->shared_int_lock);
2657                 if (--serial->shared_int->ref_count == 0)
2658                         hso_free_shared_int(serial->shared_int);
2659                 else
2660                         mutex_unlock(&serial->shared_int->shared_int_lock);
2661         }
2662         hso_free_tiomget(serial);
2663         kfree(serial);
2664         kfree(hso_dev);
2665 }
2666
2667 /* Creates a bulk AT channel */
2668 static struct hso_device *hso_create_bulk_serial_device(
2669                         struct usb_interface *interface, int port)
2670 {
2671         struct hso_device *hso_dev;
2672         struct hso_serial *serial;
2673         int num_urbs;
2674         struct hso_tiocmget *tiocmget;
2675
2676         hso_dev = hso_create_device(interface, port);
2677         if (!hso_dev)
2678                 return NULL;
2679
2680         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2681         if (!serial)
2682                 goto exit;
2683
2684         serial->parent = hso_dev;
2685         hso_dev->port_data.dev_serial = serial;
2686
2687         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2688                 num_urbs = 2;
2689                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2690                                            GFP_KERNEL);
2691                 /* it isn't going to break our heart if serial->tiocmget
2692                  *  allocation fails don't bother checking this.
2693                  */
2694                 if (serial->tiocmget) {
2695                         tiocmget = serial->tiocmget;
2696                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2697                         if (tiocmget->urb) {
2698                                 mutex_init(&tiocmget->mutex);
2699                                 init_waitqueue_head(&tiocmget->waitq);
2700                                 tiocmget->endp = hso_get_ep(
2701                                         interface,
2702                                         USB_ENDPOINT_XFER_INT,
2703                                         USB_DIR_IN);
2704                         } else
2705                                 hso_free_tiomget(serial);
2706                 }
2707         }
2708         else
2709                 num_urbs = 1;
2710
2711         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2712                                      BULK_URB_TX_SIZE))
2713                 goto exit;
2714
2715         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2716                                      USB_DIR_IN);
2717         if (!serial->in_endp) {
2718                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2719                 goto exit2;
2720         }
2721
2722         if (!
2723             (serial->out_endp =
2724              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2725                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2726                 goto exit2;
2727         }
2728
2729         serial->write_data = hso_std_serial_write_data;
2730
2731         /* and record this serial */
2732         set_serial_by_index(serial->minor, serial);
2733
2734         /* setup the proc dirs and files if needed */
2735         hso_log_port(hso_dev);
2736
2737         /* done, return it */
2738         return hso_dev;
2739
2740 exit2:
2741         hso_serial_common_free(serial);
2742 exit:
2743         hso_free_tiomget(serial);
2744         kfree(serial);
2745         kfree(hso_dev);
2746         return NULL;
2747 }
2748
2749 /* Creates a multiplexed AT channel */
2750 static
2751 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2752                                                 int port,
2753                                                 struct hso_shared_int *mux)
2754 {
2755         struct hso_device *hso_dev;
2756         struct hso_serial *serial;
2757         int port_spec;
2758
2759         port_spec = HSO_INTF_MUX;
2760         port_spec &= ~HSO_PORT_MASK;
2761
2762         port_spec |= hso_mux_to_port(port);
2763         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2764                 return NULL;
2765
2766         hso_dev = hso_create_device(interface, port_spec);
2767         if (!hso_dev)
2768                 return NULL;
2769
2770         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2771         if (!serial)
2772                 goto exit;
2773
2774         hso_dev->port_data.dev_serial = serial;
2775         serial->parent = hso_dev;
2776
2777         if (hso_serial_common_create
2778             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2779                 goto exit;
2780
2781         serial->tx_data_length--;
2782         serial->write_data = hso_mux_serial_write_data;
2783
2784         serial->shared_int = mux;
2785         mutex_lock(&serial->shared_int->shared_int_lock);
2786         serial->shared_int->ref_count++;
2787         mutex_unlock(&serial->shared_int->shared_int_lock);
2788
2789         /* and record this serial */
2790         set_serial_by_index(serial->minor, serial);
2791
2792         /* setup the proc dirs and files if needed */
2793         hso_log_port(hso_dev);
2794
2795         /* done, return it */
2796         return hso_dev;
2797
2798 exit:
2799         if (serial) {
2800                 tty_unregister_device(tty_drv, serial->minor);
2801                 kfree(serial);
2802         }
2803         if (hso_dev)
2804                 kfree(hso_dev);
2805         return NULL;
2806
2807 }
2808
2809 static void hso_free_shared_int(struct hso_shared_int *mux)
2810 {
2811         usb_free_urb(mux->shared_intr_urb);
2812         kfree(mux->shared_intr_buf);
2813         mutex_unlock(&mux->shared_int_lock);
2814         kfree(mux);
2815 }
2816
2817 static
2818 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2819 {
2820         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2821
2822         if (!mux)
2823                 return NULL;
2824
2825         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2826                                     USB_DIR_IN);
2827         if (!mux->intr_endp) {
2828                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2829                 goto exit;
2830         }
2831
2832         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2833         if (!mux->shared_intr_urb) {
2834                 dev_err(&interface->dev, "Could not allocate intr urb?");
2835                 goto exit;
2836         }
2837         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2838                                        GFP_KERNEL);
2839         if (!mux->shared_intr_buf) {
2840                 dev_err(&interface->dev, "Could not allocate intr buf?");
2841                 goto exit;
2842         }
2843
2844         mutex_init(&mux->shared_int_lock);
2845
2846         return mux;
2847
2848 exit:
2849         kfree(mux->shared_intr_buf);
2850         usb_free_urb(mux->shared_intr_urb);
2851         kfree(mux);
2852         return NULL;
2853 }
2854
2855 /* Gets the port spec for a certain interface */
2856 static int hso_get_config_data(struct usb_interface *interface)
2857 {
2858         struct usb_device *usbdev = interface_to_usbdev(interface);
2859         u8 config_data[17];
2860         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2861         s32 result;
2862
2863         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2864                             0x86, 0xC0, 0, 0, config_data, 17,
2865                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2866                 return -EIO;
2867         }
2868
2869         switch (config_data[if_num]) {
2870         case 0x0:
2871                 result = 0;
2872                 break;
2873         case 0x1:
2874                 result = HSO_PORT_DIAG;
2875                 break;
2876         case 0x2:
2877                 result = HSO_PORT_GPS;
2878                 break;
2879         case 0x3:
2880                 result = HSO_PORT_GPS_CONTROL;
2881                 break;
2882         case 0x4:
2883                 result = HSO_PORT_APP;
2884                 break;
2885         case 0x5:
2886                 result = HSO_PORT_APP2;
2887                 break;
2888         case 0x6:
2889                 result = HSO_PORT_CONTROL;
2890                 break;
2891         case 0x7:
2892                 result = HSO_PORT_NETWORK;
2893                 break;
2894         case 0x8:
2895                 result = HSO_PORT_MODEM;
2896                 break;
2897         case 0x9:
2898                 result = HSO_PORT_MSD;
2899                 break;
2900         case 0xa:
2901                 result = HSO_PORT_PCSC;
2902                 break;
2903         case 0xb:
2904                 result = HSO_PORT_VOICE;
2905                 break;
2906         default:
2907                 result = 0;
2908         }
2909
2910         if (result)
2911                 result |= HSO_INTF_BULK;
2912
2913         if (config_data[16] & 0x1)
2914                 result |= HSO_INFO_CRC_BUG;
2915
2916         return result;
2917 }
2918
2919 /* called once for each interface upon device insertion */
2920 static int hso_probe(struct usb_interface *interface,
2921                      const struct usb_device_id *id)
2922 {
2923         int mux, i, if_num, port_spec;
2924         unsigned char port_mask;
2925         struct hso_device *hso_dev = NULL;
2926         struct hso_shared_int *shared_int;
2927         struct hso_device *tmp_dev = NULL;
2928
2929         if_num = interface->altsetting->desc.bInterfaceNumber;
2930
2931         /* Get the interface/port specification from either driver_info or from
2932          * the device itself */
2933         if (id->driver_info)
2934                 port_spec = ((u32 *)(id->driver_info))[if_num];
2935         else
2936                 port_spec = hso_get_config_data(interface);
2937
2938         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2939                 dev_err(&interface->dev, "Not our interface\n");
2940                 return -ENODEV;
2941         }
2942         /* Check if we need to switch to alt interfaces prior to port
2943          * configuration */
2944         if (interface->num_altsetting > 1)
2945                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2946         interface->needs_remote_wakeup = 1;
2947
2948         /* Allocate new hso device(s) */
2949         switch (port_spec & HSO_INTF_MASK) {
2950         case HSO_INTF_MUX:
2951                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2952                         /* Create the network device */
2953                         if (!disable_net) {
2954                                 hso_dev = hso_create_net_device(interface,
2955                                                                 port_spec);
2956                                 if (!hso_dev)
2957                                         goto exit;
2958                                 tmp_dev = hso_dev;
2959                         }
2960                 }
2961
2962                 if (hso_get_mux_ports(interface, &port_mask))
2963                         /* TODO: de-allocate everything */
2964                         goto exit;
2965
2966                 shared_int = hso_create_shared_int(interface);
2967                 if (!shared_int)
2968                         goto exit;
2969
2970                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2971                         if (port_mask & i) {
2972                                 hso_dev = hso_create_mux_serial_device(
2973                                                 interface, i, shared_int);
2974                                 if (!hso_dev)
2975                                         goto exit;
2976                         }
2977                 }
2978
2979                 if (tmp_dev)
2980                         hso_dev = tmp_dev;
2981                 break;
2982
2983         case HSO_INTF_BULK:
2984                 /* It's a regular bulk interface */
2985                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
2986                     !disable_net)
2987                         hso_dev = hso_create_net_device(interface, port_spec);
2988                 else
2989                         hso_dev =
2990                             hso_create_bulk_serial_device(interface, port_spec);
2991                 if (!hso_dev)
2992                         goto exit;
2993                 break;
2994         default:
2995                 goto exit;
2996         }
2997
2998         /* save our data pointer in this device */
2999         usb_set_intfdata(interface, hso_dev);
3000
3001         /* done */
3002         return 0;
3003 exit:
3004         hso_free_interface(interface);
3005         return -ENODEV;
3006 }
3007
3008 /* device removed, cleaning up */
3009 static void hso_disconnect(struct usb_interface *interface)
3010 {
3011         hso_free_interface(interface);
3012
3013         /* remove reference of our private data */
3014         usb_set_intfdata(interface, NULL);
3015 }
3016
3017 static void async_get_intf(struct work_struct *data)
3018 {
3019         struct hso_device *hso_dev =
3020             container_of(data, struct hso_device, async_get_intf);
3021         usb_autopm_get_interface(hso_dev->interface);
3022 }
3023
3024 static void async_put_intf(struct work_struct *data)
3025 {
3026         struct hso_device *hso_dev =
3027             container_of(data, struct hso_device, async_put_intf);
3028         usb_autopm_put_interface(hso_dev->interface);
3029 }
3030
3031 static int hso_get_activity(struct hso_device *hso_dev)
3032 {
3033         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3034                 if (!hso_dev->is_active) {
3035                         hso_dev->is_active = 1;
3036                         schedule_work(&hso_dev->async_get_intf);
3037                 }
3038         }
3039
3040         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3041                 return -EAGAIN;
3042
3043         usb_mark_last_busy(hso_dev->usb);
3044
3045         return 0;
3046 }
3047
3048 static int hso_put_activity(struct hso_device *hso_dev)
3049 {
3050         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3051                 if (hso_dev->is_active) {
3052                         hso_dev->is_active = 0;
3053                         schedule_work(&hso_dev->async_put_intf);
3054                         return -EAGAIN;
3055                 }
3056         }
3057         hso_dev->is_active = 0;
3058         return 0;
3059 }
3060
3061 /* called by kernel when we need to suspend device */
3062 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3063 {
3064         int i, result;
3065
3066         /* Stop all serial ports */
3067         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3068                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3069                         result = hso_stop_serial_device(serial_table[i]);
3070                         if (result)
3071                                 goto out;
3072                 }
3073         }
3074
3075         /* Stop all network ports */
3076         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3077                 if (network_table[i] &&
3078                     (network_table[i]->interface == iface)) {
3079                         result = hso_stop_net_device(network_table[i]);
3080                         if (result)
3081                                 goto out;
3082                 }
3083         }
3084
3085 out:
3086         return 0;
3087 }
3088
3089 /* called by kernel when we need to resume device */
3090 static int hso_resume(struct usb_interface *iface)
3091 {
3092         int i, result = 0;
3093         struct hso_net *hso_net;
3094
3095         /* Start all serial ports */
3096         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3097                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3098                         if (dev2ser(serial_table[i])->open_count) {
3099                                 result =
3100                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3101                                 hso_kick_transmit(dev2ser(serial_table[i]));
3102                                 if (result)
3103                                         goto out;
3104                         }
3105                 }
3106         }
3107
3108         /* Start all network ports */
3109         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3110                 if (network_table[i] &&
3111                     (network_table[i]->interface == iface)) {
3112                         hso_net = dev2net(network_table[i]);
3113                         if (hso_net->flags & IFF_UP) {
3114                                 /* First transmit any lingering data,
3115                                    then restart the device. */
3116                                 if (hso_net->skb_tx_buf) {
3117                                         dev_dbg(&iface->dev,
3118                                                 "Transmitting"
3119                                                 " lingering data\n");
3120                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3121                                                            hso_net->net);
3122                                         hso_net->skb_tx_buf = NULL;
3123                                 }
3124                                 result = hso_start_net_device(network_table[i]);
3125                                 if (result)
3126                                         goto out;
3127                         }
3128                 }
3129         }
3130
3131 out:
3132         return result;
3133 }
3134
3135 static void hso_serial_ref_free(struct kref *ref)
3136 {
3137         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3138
3139         hso_free_serial_device(hso_dev);
3140 }
3141
3142 static void hso_free_interface(struct usb_interface *interface)
3143 {
3144         struct hso_serial *hso_dev;
3145         struct tty_struct *tty;
3146         int i;
3147
3148         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3149                 if (serial_table[i] &&
3150                     (serial_table[i]->interface == interface)) {
3151                         hso_dev = dev2ser(serial_table[i]);
3152                         spin_lock_irq(&hso_dev->serial_lock);
3153                         tty = tty_kref_get(hso_dev->tty);
3154                         spin_unlock_irq(&hso_dev->serial_lock);
3155                         if (tty)
3156                                 tty_hangup(tty);
3157                         mutex_lock(&hso_dev->parent->mutex);
3158                         tty_kref_put(tty);
3159                         hso_dev->parent->usb_gone = 1;
3160                         mutex_unlock(&hso_dev->parent->mutex);
3161                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3162                 }
3163         }
3164
3165         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3166                 if (network_table[i] &&
3167                     (network_table[i]->interface == interface)) {
3168                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3169                         /* hso_stop_net_device doesn't stop the net queue since
3170                          * traffic needs to start it again when suspended */
3171                         netif_stop_queue(dev2net(network_table[i])->net);
3172                         hso_stop_net_device(network_table[i]);
3173                         cancel_work_sync(&network_table[i]->async_put_intf);
3174                         cancel_work_sync(&network_table[i]->async_get_intf);
3175                         if (rfk) {
3176                                 rfkill_unregister(rfk);
3177                                 rfkill_destroy(rfk);
3178                         }
3179                         hso_free_net_device(network_table[i]);
3180                 }
3181         }
3182 }
3183
3184 /* Helper functions */
3185
3186 /* Get the endpoint ! */
3187 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3188                                                   int type, int dir)
3189 {
3190         int i;
3191         struct usb_host_interface *iface = intf->cur_altsetting;
3192         struct usb_endpoint_descriptor *endp;
3193
3194         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3195                 endp = &iface->endpoint[i].desc;
3196                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3197                     (usb_endpoint_type(endp) == type))
3198                         return endp;
3199         }
3200
3201         return NULL;
3202 }
3203
3204 /* Get the byte that describes which ports are enabled */
3205 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3206 {
3207         int i;
3208         struct usb_host_interface *iface = intf->cur_altsetting;
3209
3210         if (iface->extralen == 3) {
3211                 *ports = iface->extra[2];
3212                 return 0;
3213         }
3214
3215         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3216                 if (iface->endpoint[i].extralen == 3) {
3217                         *ports = iface->endpoint[i].extra[2];
3218                         return 0;
3219                 }
3220         }
3221
3222         return -1;
3223 }
3224
3225 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3226 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3227                                    struct usb_device *usb, gfp_t gfp)
3228 {
3229         int result;
3230
3231         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3232                          usb_rcvintpipe(usb,
3233                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3234                          shared_int->shared_intr_buf,
3235                          shared_int->intr_endp->wMaxPacketSize,
3236                          intr_callback, shared_int,
3237                          shared_int->intr_endp->bInterval);
3238
3239         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3240         if (result)
3241                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
3242                         result);
3243
3244         return result;
3245 }
3246
3247 /* operations setup of the serial interface */
3248 static const struct tty_operations hso_serial_ops = {
3249         .open = hso_serial_open,
3250         .close = hso_serial_close,
3251         .write = hso_serial_write,
3252         .write_room = hso_serial_write_room,
3253         .ioctl = hso_serial_ioctl,
3254         .set_termios = hso_serial_set_termios,
3255         .chars_in_buffer = hso_serial_chars_in_buffer,
3256         .tiocmget = hso_serial_tiocmget,
3257         .tiocmset = hso_serial_tiocmset,
3258         .unthrottle = hso_unthrottle
3259 };
3260
3261 static struct usb_driver hso_driver = {
3262         .name = driver_name,
3263         .probe = hso_probe,
3264         .disconnect = hso_disconnect,
3265         .id_table = hso_ids,
3266         .suspend = hso_suspend,
3267         .resume = hso_resume,
3268         .reset_resume = hso_resume,
3269         .supports_autosuspend = 1,
3270 };
3271
3272 static int __init hso_init(void)
3273 {
3274         int i;
3275         int result;
3276
3277         /* put it in the log */
3278         printk(KERN_INFO "hso: %s\n", version);
3279
3280         /* Initialise the serial table semaphore and table */
3281         spin_lock_init(&serial_table_lock);
3282         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3283                 serial_table[i] = NULL;
3284
3285         /* allocate our driver using the proper amount of supported minors */
3286         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3287         if (!tty_drv)
3288                 return -ENOMEM;
3289
3290         /* fill in all needed values */
3291         tty_drv->magic = TTY_DRIVER_MAGIC;
3292         tty_drv->owner = THIS_MODULE;
3293         tty_drv->driver_name = driver_name;
3294         tty_drv->name = tty_filename;
3295
3296         /* if major number is provided as parameter, use that one */
3297         if (tty_major)
3298                 tty_drv->major = tty_major;
3299
3300         tty_drv->minor_start = 0;
3301         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3302         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3303         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3304         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3305         tty_drv->init_termios = tty_std_termios;
3306         hso_init_termios(&tty_drv->init_termios);
3307         tty_set_operations(tty_drv, &hso_serial_ops);
3308
3309         /* register the tty driver */
3310         result = tty_register_driver(tty_drv);
3311         if (result) {
3312                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3313                         __func__, result);
3314                 return result;
3315         }
3316
3317         /* register this module as an usb driver */
3318         result = usb_register(&hso_driver);
3319         if (result) {
3320                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3321                         result);
3322                 /* cleanup serial interface */
3323                 tty_unregister_driver(tty_drv);
3324                 return result;
3325         }
3326
3327         /* done */
3328         return 0;
3329 }
3330
3331 static void __exit hso_exit(void)
3332 {
3333         printk(KERN_INFO "hso: unloaded\n");
3334
3335         tty_unregister_driver(tty_drv);
3336         /* deregister the usb driver */
3337         usb_deregister(&hso_driver);
3338 }
3339
3340 /* Module definitions */
3341 module_init(hso_init);
3342 module_exit(hso_exit);
3343
3344 MODULE_AUTHOR(MOD_AUTHOR);
3345 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3346 MODULE_LICENSE(MOD_LICENSE);
3347 MODULE_INFO(Version, DRIVER_VERSION);
3348
3349 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3350 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3351 module_param(debug, int, S_IRUGO | S_IWUSR);
3352
3353 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3354 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3355 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3356
3357 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3358 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3359 module_param(disable_net, int, S_IRUGO | S_IWUSR);