drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *                     Filip Aben <f.aben@option.com>
   7  *                     Denis Joseph Barrow <d.barow@option.com>
   8  *                     Jan Dumon <j.dumon@option.com>
   9  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
  10  *                      <ajb@spheresystems.co.uk>
  11  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
  12  *  Copyright (C) 2008 Novell, Inc.
  13  *
  14  *  This program is free software; you can redistribute it and/or modify
  15  *  it under the terms of the GNU General Public License version 2 as
  16  *  published by the Free Software Foundation.
  17  *
  18  *  This program is distributed in the hope that it will be useful,
  19  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  *  GNU General Public License for more details.
  22  *
  23  *  You should have received a copy of the GNU General Public License
  24  *  along with this program; if not, write to the Free Software
  25  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  26  *  USA
  27  *
  28  *
  29  *****************************************************************************/
  30
  31 /******************************************************************************
  32  *
  33  * Description of the device:
  34  *
  35  * Interface 0: Contains the IP network interface on the bulk end points.
  36  *              The multiplexed serial ports are using the interrupt and
  37  *              control endpoints.
  38  *              Interrupt contains a bitmap telling which multiplexed
  39  *              serialport needs servicing.
  40  *
  41  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  42  *              port is opened, as this have a huge impact on the network port
  43  *              throughput.
  44  *
  45  * Interface 2: Standard modem interface - circuit switched interface, this
  46  *              can be used to make a standard ppp connection however it
  47  *              should not be used in conjunction with the IP network interface
  48  *              enabled for USB performance reasons i.e. if using this set
  49  *              ideally disable_net=1.
  50  *
  51  *****************************************************************************/
  52
  53 #include <linux/sched.h>
  54 #include <linux/slab.h>
  55 #include <linux/init.h>
  56 #include <linux/delay.h>
  57 #include <linux/netdevice.h>
  58 #include <linux/module.h>
  59 #include <linux/ethtool.h>
  60 #include <linux/usb.h>
  61 #include <linux/timer.h>
  62 #include <linux/tty.h>
  63 #include <linux/tty_driver.h>
  64 #include <linux/tty_flip.h>
  65 #include <linux/kmod.h>
  66 #include <linux/rfkill.h>
  67 #include <linux/ip.h>
  68 #include <linux/uaccess.h>
  69 #include <linux/usb/cdc.h>
  70 #include <net/arp.h>
  71 #include <asm/byteorder.h>
  72 #include <linux/serial_core.h>
  73 #include <linux/serial.h>
  74
  75
  76 #define DRIVER_VERSION                  "1.2"
  77 #define MOD_AUTHOR                      "Option Wireless"
  78 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  79 #define MOD_LICENSE                     "GPL"
  80
  81 #define HSO_MAX_NET_DEVICES             10
  82 #define HSO__MAX_MTU                    2048
  83 #define DEFAULT_MTU                     1500
  84 #define DEFAULT_MRU                     1500
  85
  86 #define CTRL_URB_RX_SIZE                1024
  87 #define CTRL_URB_TX_SIZE                64
  88
  89 #define BULK_URB_RX_SIZE                4096
  90 #define BULK_URB_TX_SIZE                8192
  91
  92 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  94 #define MUX_BULK_RX_BUF_COUNT           4
  95 #define USB_TYPE_OPTION_VENDOR          0x20
  96
  97 /* These definitions are used with the struct hso_net flags element */
  98 /* - use *_bit operations on it. (bit indices not values.) */
  99 #define HSO_NET_RUNNING                 0
 100
 101 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 102
 103 #define HSO_SERIAL_MAGIC                0x48534f31
 104
 105 /* Number of ttys to handle */
 106 #define HSO_SERIAL_TTY_MINORS           256
 107
 108 #define MAX_RX_URBS                     2
 109
 110 static inline struct hso_serial *get_serial_by_tty(struct tty_struct *tty)
 111 {
 112         if (tty)
 113                 return tty->driver_data;
 114         return NULL;
 115 }
 116
 117 /*****************************************************************************/
 118 /* Debugging functions                                                       */
 119 /*****************************************************************************/
 120 #define D__(lvl_, fmt, arg...)                          \
 121         do {                                            \
 122                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 123                        __LINE__, __func__, ## arg);     \
 124         } while (0)
 125
 126 #define D_(lvl, args...)                                \
 127         do {                                            \
 128                 if (lvl & debug)                        \
 129                         D__(KERN_INFO, args);           \
 130         } while (0)
 131
 132 #define D1(args...)     D_(0x01, ##args)
 133 #define D2(args...)     D_(0x02, ##args)
 134 #define D3(args...)     D_(0x04, ##args)
 135 #define D4(args...)     D_(0x08, ##args)
 136 #define D5(args...)     D_(0x10, ##args)
 137
 138 /*****************************************************************************/
 139 /* Enumerators                                                               */
 140 /*****************************************************************************/
 141 enum pkt_parse_state {
 142         WAIT_IP,
 143         WAIT_DATA,
 144         WAIT_SYNC
 145 };
 146
 147 /*****************************************************************************/
 148 /* Structs                                                                   */
 149 /*****************************************************************************/
 150
 151 struct hso_shared_int {
 152         struct usb_endpoint_descriptor *intr_endp;
 153         void *shared_intr_buf;
 154         struct urb *shared_intr_urb;
 155         struct usb_device *usb;
 156         int use_count;
 157         int ref_count;
 158         struct mutex shared_int_lock;
 159 };
 160
 161 struct hso_net {
 162         struct hso_device *parent;
 163         struct net_device *net;
 164         struct rfkill *rfkill;
 165
 166         struct usb_endpoint_descriptor *in_endp;
 167         struct usb_endpoint_descriptor *out_endp;
 168
 169         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 170         struct urb *mux_bulk_tx_urb;
 171         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 172         void *mux_bulk_tx_buf;
 173
 174         struct sk_buff *skb_rx_buf;
 175         struct sk_buff *skb_tx_buf;
 176
 177         enum pkt_parse_state rx_parse_state;
 178         spinlock_t net_lock;
 179
 180         unsigned short rx_buf_size;
 181         unsigned short rx_buf_missing;
 182         struct iphdr rx_ip_hdr;
 183
 184         unsigned long flags;
 185 };
 186
 187 enum rx_ctrl_state{
 188         RX_IDLE,
 189         RX_SENT,
 190         RX_PENDING
 191 };
 192
 193 #define BM_REQUEST_TYPE (0xa1)
 194 #define B_NOTIFICATION  (0x20)
 195 #define W_VALUE         (0x0)
 196 #define W_INDEX         (0x2)
 197 #define W_LENGTH        (0x2)
 198
 199 #define B_OVERRUN       (0x1<<6)
 200 #define B_PARITY        (0x1<<5)
 201 #define B_FRAMING       (0x1<<4)
 202 #define B_RING_SIGNAL   (0x1<<3)
 203 #define B_BREAK         (0x1<<2)
 204 #define B_TX_CARRIER    (0x1<<1)
 205 #define B_RX_CARRIER    (0x1<<0)
 206
 207 struct hso_serial_state_notification {
 208         u8 bmRequestType;
 209         u8 bNotification;
 210         u16 wValue;
 211         u16 wIndex;
 212         u16 wLength;
 213         u16 UART_state_bitmap;
 214 } __attribute__((packed));
 215
 216 struct hso_tiocmget {
 217         struct mutex mutex;
 218         wait_queue_head_t waitq;
 219         int    intr_completed;
 220         struct usb_endpoint_descriptor *endp;
 221         struct urb *urb;
 222         struct hso_serial_state_notification serial_state_notification;
 223         u16    prev_UART_state_bitmap;
 224         struct uart_icount icount;
 225 };
 226
 227
 228 struct hso_serial {
 229         struct hso_device *parent;
 230         int magic;
 231         u8 minor;
 232
 233         struct hso_shared_int *shared_int;
 234
 235         /* rx/tx urb could be either a bulk urb or a control urb depending
 236            on which serial port it is used on. */
 237         struct urb *rx_urb[MAX_RX_URBS];
 238         u8 num_rx_urbs;
 239         u8 *rx_data[MAX_RX_URBS];
 240         u16 rx_data_length;     /* should contain allocated length */
 241
 242         struct urb *tx_urb;
 243         u8 *tx_data;
 244         u8 *tx_buffer;
 245         u16 tx_data_length;     /* should contain allocated length */
 246         u16 tx_data_count;
 247         u16 tx_buffer_count;
 248         struct usb_ctrlrequest ctrl_req_tx;
 249         struct usb_ctrlrequest ctrl_req_rx;
 250
 251         struct usb_endpoint_descriptor *in_endp;
 252         struct usb_endpoint_descriptor *out_endp;
 253
 254         enum rx_ctrl_state rx_state;
 255         u8 rts_state;
 256         u8 dtr_state;
 257         unsigned tx_urb_used:1;
 258
 259         /* from usb_serial_port */
 260         struct tty_struct *tty;
 261         int open_count;
 262         spinlock_t serial_lock;
 263
 264         int (*write_data) (struct hso_serial *serial);
 265         struct hso_tiocmget  *tiocmget;
 266         /* Hacks required to get flow control
 267          * working on the serial receive buffers
 268          * so as not to drop characters on the floor.
 269          */
 270         int  curr_rx_urb_idx;
 271         u16  curr_rx_urb_offset;
 272         u8   rx_urb_filled[MAX_RX_URBS];
 273         struct tasklet_struct unthrottle_tasklet;
 274         struct work_struct    retry_unthrottle_workqueue;
 275 };
 276
 277 struct hso_device {
 278         union {
 279                 struct hso_serial *dev_serial;
 280                 struct hso_net *dev_net;
 281         } port_data;
 282
 283         u32 port_spec;
 284
 285         u8 is_active;
 286         u8 usb_gone;
 287         struct work_struct async_get_intf;
 288         struct work_struct async_put_intf;
 289         struct work_struct reset_device;
 290
 291         struct usb_device *usb;
 292         struct usb_interface *interface;
 293
 294         struct device *dev;
 295         struct kref ref;
 296         struct mutex mutex;
 297 };
 298
 299 /* Type of interface */
 300 #define HSO_INTF_MASK           0xFF00
 301 #define HSO_INTF_MUX            0x0100
 302 #define HSO_INTF_BULK           0x0200
 303
 304 /* Type of port */
 305 #define HSO_PORT_MASK           0xFF
 306 #define HSO_PORT_NO_PORT        0x0
 307 #define HSO_PORT_CONTROL        0x1
 308 #define HSO_PORT_APP            0x2
 309 #define HSO_PORT_GPS            0x3
 310 #define HSO_PORT_PCSC           0x4
 311 #define HSO_PORT_APP2           0x5
 312 #define HSO_PORT_GPS_CONTROL    0x6
 313 #define HSO_PORT_MSD            0x7
 314 #define HSO_PORT_VOICE          0x8
 315 #define HSO_PORT_DIAG2          0x9
 316 #define HSO_PORT_DIAG           0x10
 317 #define HSO_PORT_MODEM          0x11
 318 #define HSO_PORT_NETWORK        0x12
 319
 320 /* Additional device info */
 321 #define HSO_INFO_MASK           0xFF000000
 322 #define HSO_INFO_CRC_BUG        0x01000000
 323
 324 /*****************************************************************************/
 325 /* Prototypes                                                                */
 326 /*****************************************************************************/
 327 /* Serial driver functions */
 328 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 329                                unsigned int set, unsigned int clear);
 330 static void ctrl_callback(struct urb *urb);
 331 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 332 static void hso_kick_transmit(struct hso_serial *serial);
 333 /* Helper functions */
 334 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 335                                    struct usb_device *usb, gfp_t gfp);
 336 static void handle_usb_error(int status, const char *function,
 337                              struct hso_device *hso_dev);
 338 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 339                                                   int type, int dir);
 340 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 341 static void hso_free_interface(struct usb_interface *intf);
 342 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 343 static int hso_stop_serial_device(struct hso_device *hso_dev);
 344 static int hso_start_net_device(struct hso_device *hso_dev);
 345 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 346 static int hso_stop_net_device(struct hso_device *hso_dev);
 347 static void hso_serial_ref_free(struct kref *ref);
 348 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 349 static int hso_mux_serial_read(struct hso_serial *serial);
 350 static void async_get_intf(struct work_struct *data);
 351 static void async_put_intf(struct work_struct *data);
 352 static int hso_put_activity(struct hso_device *hso_dev);
 353 static int hso_get_activity(struct hso_device *hso_dev);
 354 static void tiocmget_intr_callback(struct urb *urb);
 355 static void reset_device(struct work_struct *data);
 356 /*****************************************************************************/
 357 /* Helping functions                                                         */
 358 /*****************************************************************************/
 359
 360 /* #define DEBUG */
 361
 362 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 363 {
 364         return hso_dev->port_data.dev_net;
 365 }
 366
 367 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 368 {
 369         return hso_dev->port_data.dev_serial;
 370 }
 371
 372 /* Debugging functions */
 373 #ifdef DEBUG
 374 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 375                      unsigned int len)
 376 {
 377         static char name[255];
 378
 379         sprintf(name, "hso[%d:%s]", line_count, func_name);
 380         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 381 }
 382
 383 #define DUMP(buf_, len_)        \
 384         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 385
 386 #define DUMP1(buf_, len_)                       \
 387         do {                                    \
 388                 if (0x01 & debug)               \
 389                         DUMP(buf_, len_);       \
 390         } while (0)
 391 #else
 392 #define DUMP(buf_, len_)
 393 #define DUMP1(buf_, len_)
 394 #endif
 395
 396 /* module parameters */
 397 static int debug;
 398 static int tty_major;
 399 static int disable_net;
 400
 401 /* driver info */
 402 static const char driver_name[] = "hso";
 403 static const char tty_filename[] = "ttyHS";
 404 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 405 /* the usb driver itself (registered in hso_init) */
 406 static struct usb_driver hso_driver;
 407 /* serial structures */
 408 static struct tty_driver *tty_drv;
 409 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 410 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 411 static spinlock_t serial_table_lock;
 412
 413 static const s32 default_port_spec[] = {
 414         HSO_INTF_MUX | HSO_PORT_NETWORK,
 415         HSO_INTF_BULK | HSO_PORT_DIAG,
 416         HSO_INTF_BULK | HSO_PORT_MODEM,
 417         0
 418 };
 419
 420 static const s32 icon321_port_spec[] = {
 421         HSO_INTF_MUX | HSO_PORT_NETWORK,
 422         HSO_INTF_BULK | HSO_PORT_DIAG2,
 423         HSO_INTF_BULK | HSO_PORT_MODEM,
 424         HSO_INTF_BULK | HSO_PORT_DIAG,
 425         0
 426 };
 427
 428 #define default_port_device(vendor, product)    \
 429         USB_DEVICE(vendor, product),    \
 430                 .driver_info = (kernel_ulong_t)default_port_spec
 431
 432 #define icon321_port_device(vendor, product)    \
 433         USB_DEVICE(vendor, product),    \
 434                 .driver_info = (kernel_ulong_t)icon321_port_spec
 435
 436 /* list of devices we support */
 437 static const struct usb_device_id hso_ids[] = {
 438         {default_port_device(0x0af0, 0x6711)},
 439         {default_port_device(0x0af0, 0x6731)},
 440         {default_port_device(0x0af0, 0x6751)},
 441         {default_port_device(0x0af0, 0x6771)},
 442         {default_port_device(0x0af0, 0x6791)},
 443         {default_port_device(0x0af0, 0x6811)},
 444         {default_port_device(0x0af0, 0x6911)},
 445         {default_port_device(0x0af0, 0x6951)},
 446         {default_port_device(0x0af0, 0x6971)},
 447         {default_port_device(0x0af0, 0x7011)},
 448         {default_port_device(0x0af0, 0x7031)},
 449         {default_port_device(0x0af0, 0x7051)},
 450         {default_port_device(0x0af0, 0x7071)},
 451         {default_port_device(0x0af0, 0x7111)},
 452         {default_port_device(0x0af0, 0x7211)},
 453         {default_port_device(0x0af0, 0x7251)},
 454         {default_port_device(0x0af0, 0x7271)},
 455         {default_port_device(0x0af0, 0x7311)},
 456         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 457         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 458         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 459         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 460         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 461         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 462         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 463         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 464         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 465         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 466         {USB_DEVICE(0x0af0, 0x7701)},
 467         {USB_DEVICE(0x0af0, 0x7706)},
 468         {USB_DEVICE(0x0af0, 0x7801)},
 469         {USB_DEVICE(0x0af0, 0x7901)},
 470         {USB_DEVICE(0x0af0, 0x7A01)},
 471         {USB_DEVICE(0x0af0, 0x7A05)},
 472         {USB_DEVICE(0x0af0, 0x8200)},
 473         {USB_DEVICE(0x0af0, 0x8201)},
 474         {USB_DEVICE(0x0af0, 0x8300)},
 475         {USB_DEVICE(0x0af0, 0x8302)},
 476         {USB_DEVICE(0x0af0, 0x8304)},
 477         {USB_DEVICE(0x0af0, 0x8400)},
 478         {USB_DEVICE(0x0af0, 0xd035)},
 479         {USB_DEVICE(0x0af0, 0xd055)},
 480         {USB_DEVICE(0x0af0, 0xd155)},
 481         {USB_DEVICE(0x0af0, 0xd255)},
 482         {USB_DEVICE(0x0af0, 0xd057)},
 483         {USB_DEVICE(0x0af0, 0xd157)},
 484         {USB_DEVICE(0x0af0, 0xd257)},
 485         {USB_DEVICE(0x0af0, 0xd357)},
 486         {USB_DEVICE(0x0af0, 0xd058)},
 487         {USB_DEVICE(0x0af0, 0xc100)},
 488         {}
 489 };
 490 MODULE_DEVICE_TABLE(usb, hso_ids);
 491
 492 /* Sysfs attribute */
 493 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 494                                        struct device_attribute *attr,
 495                                        char *buf)
 496 {
 497         struct hso_device *hso_dev = dev_get_drvdata(dev);
 498         char *port_name;
 499
 500         if (!hso_dev)
 501                 return 0;
 502
 503         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 504         case HSO_PORT_CONTROL:
 505                 port_name = "Control";
 506                 break;
 507         case HSO_PORT_APP:
 508                 port_name = "Application";
 509                 break;
 510         case HSO_PORT_APP2:
 511                 port_name = "Application2";
 512                 break;
 513         case HSO_PORT_GPS:
 514                 port_name = "GPS";
 515                 break;
 516         case HSO_PORT_GPS_CONTROL:
 517                 port_name = "GPS Control";
 518                 break;
 519         case HSO_PORT_PCSC:
 520                 port_name = "PCSC";
 521                 break;
 522         case HSO_PORT_DIAG:
 523                 port_name = "Diagnostic";
 524                 break;
 525         case HSO_PORT_DIAG2:
 526                 port_name = "Diagnostic2";
 527                 break;
 528         case HSO_PORT_MODEM:
 529                 port_name = "Modem";
 530                 break;
 531         case HSO_PORT_NETWORK:
 532                 port_name = "Network";
 533                 break;
 534         default:
 535                 port_name = "Unknown";
 536                 break;
 537         }
 538
 539         return sprintf(buf, "%s\n", port_name);
 540 }
 541 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 542
 543 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 544 {
 545         int idx;
 546
 547         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 548                 if (serial->rx_urb[idx] == urb)
 549                         return idx;
 550         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 551         return -1;
 552 }
 553
 554 /* converts mux value to a port spec value */
 555 static u32 hso_mux_to_port(int mux)
 556 {
 557         u32 result;
 558
 559         switch (mux) {
 560         case 0x1:
 561                 result = HSO_PORT_CONTROL;
 562                 break;
 563         case 0x2:
 564                 result = HSO_PORT_APP;
 565                 break;
 566         case 0x4:
 567                 result = HSO_PORT_PCSC;
 568                 break;
 569         case 0x8:
 570                 result = HSO_PORT_GPS;
 571                 break;
 572         case 0x10:
 573                 result = HSO_PORT_APP2;
 574                 break;
 575         default:
 576                 result = HSO_PORT_NO_PORT;
 577         }
 578         return result;
 579 }
 580
 581 /* converts port spec value to a mux value */
 582 static u32 hso_port_to_mux(int port)
 583 {
 584         u32 result;
 585
 586         switch (port & HSO_PORT_MASK) {
 587         case HSO_PORT_CONTROL:
 588                 result = 0x0;
 589                 break;
 590         case HSO_PORT_APP:
 591                 result = 0x1;
 592                 break;
 593         case HSO_PORT_PCSC:
 594                 result = 0x2;
 595                 break;
 596         case HSO_PORT_GPS:
 597                 result = 0x3;
 598                 break;
 599         case HSO_PORT_APP2:
 600                 result = 0x4;
 601                 break;
 602         default:
 603                 result = 0x0;
 604         }
 605         return result;
 606 }
 607
 608 static struct hso_serial *get_serial_by_shared_int_and_type(
 609                                         struct hso_shared_int *shared_int,
 610                                         int mux)
 611 {
 612         int i, port;
 613
 614         port = hso_mux_to_port(mux);
 615
 616         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 617                 if (serial_table[i] &&
 618                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 619                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 620                         return dev2ser(serial_table[i]);
 621                 }
 622         }
 623
 624         return NULL;
 625 }
 626
 627 static struct hso_serial *get_serial_by_index(unsigned index)
 628 {
 629         struct hso_serial *serial = NULL;
 630         unsigned long flags;
 631
 632         spin_lock_irqsave(&serial_table_lock, flags);
 633         if (serial_table[index])
 634                 serial = dev2ser(serial_table[index]);
 635         spin_unlock_irqrestore(&serial_table_lock, flags);
 636
 637         return serial;
 638 }
 639
 640 static int get_free_serial_index(void)
 641 {
 642         int index;
 643         unsigned long flags;
 644
 645         spin_lock_irqsave(&serial_table_lock, flags);
 646         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 647                 if (serial_table[index] == NULL) {
 648                         spin_unlock_irqrestore(&serial_table_lock, flags);
 649                         return index;
 650                 }
 651         }
 652         spin_unlock_irqrestore(&serial_table_lock, flags);
 653
 654         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 655         return -1;
 656 }
 657
 658 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 659 {
 660         unsigned long flags;
 661
 662         spin_lock_irqsave(&serial_table_lock, flags);
 663         if (serial)
 664                 serial_table[index] = serial->parent;
 665         else
 666                 serial_table[index] = NULL;
 667         spin_unlock_irqrestore(&serial_table_lock, flags);
 668 }
 669
 670 static void handle_usb_error(int status, const char *function,
 671                              struct hso_device *hso_dev)
 672 {
 673         char *explanation;
 674
 675         switch (status) {
 676         case -ENODEV:
 677                 explanation = "no device";
 678                 break;
 679         case -ENOENT:
 680                 explanation = "endpoint not enabled";
 681                 break;
 682         case -EPIPE:
 683                 explanation = "endpoint stalled";
 684                 break;
 685         case -ENOSPC:
 686                 explanation = "not enough bandwidth";
 687                 break;
 688         case -ESHUTDOWN:
 689                 explanation = "device disabled";
 690                 break;
 691         case -EHOSTUNREACH:
 692                 explanation = "device suspended";
 693                 break;
 694         case -EINVAL:
 695         case -EAGAIN:
 696         case -EFBIG:
 697         case -EMSGSIZE:
 698                 explanation = "internal error";
 699                 break;
 700         case -EILSEQ:
 701         case -EPROTO:
 702         case -ETIME:
 703         case -ETIMEDOUT:
 704                 explanation = "protocol error";
 705                 if (hso_dev)
 706                         schedule_work(&hso_dev->reset_device);
 707                 break;
 708         default:
 709                 explanation = "unknown status";
 710                 break;
 711         }
 712
 713         /* log a meaningful explanation of an USB status */
 714         D1("%s: received USB status - %s (%d)", function, explanation, status);
 715 }
 716
 717 /* Network interface functions */
 718
 719 /* called when net interface is brought up by ifconfig */
 720 static int hso_net_open(struct net_device *net)
 721 {
 722         struct hso_net *odev = netdev_priv(net);
 723         unsigned long flags = 0;
 724
 725         if (!odev) {
 726                 dev_err(&net->dev, "No net device !\n");
 727                 return -ENODEV;
 728         }
 729
 730         odev->skb_tx_buf = NULL;
 731
 732         /* setup environment */
 733         spin_lock_irqsave(&odev->net_lock, flags);
 734         odev->rx_parse_state = WAIT_IP;
 735         odev->rx_buf_size = 0;
 736         odev->rx_buf_missing = sizeof(struct iphdr);
 737         spin_unlock_irqrestore(&odev->net_lock, flags);
 738
 739         /* We are up and running. */
 740         set_bit(HSO_NET_RUNNING, &odev->flags);
 741         hso_start_net_device(odev->parent);
 742
 743         /* Tell the kernel we are ready to start receiving from it */
 744         netif_start_queue(net);
 745
 746         return 0;
 747 }
 748
 749 /* called when interface is brought down by ifconfig */
 750 static int hso_net_close(struct net_device *net)
 751 {
 752         struct hso_net *odev = netdev_priv(net);
 753
 754         /* we don't need the queue anymore */
 755         netif_stop_queue(net);
 756         /* no longer running */
 757         clear_bit(HSO_NET_RUNNING, &odev->flags);
 758
 759         hso_stop_net_device(odev->parent);
 760
 761         /* done */
 762         return 0;
 763 }
 764
 765 /* USB tells is xmit done, we should start the netqueue again */
 766 static void write_bulk_callback(struct urb *urb)
 767 {
 768         struct hso_net *odev = urb->context;
 769         int status = urb->status;
 770
 771         /* Sanity check */
 772         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 773                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 774                 return;
 775         }
 776
 777         /* Do we still have a valid kernel network device? */
 778         if (!netif_device_present(odev->net)) {
 779                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 780                         __func__);
 781                 return;
 782         }
 783
 784         /* log status, but don't act on it, we don't need to resubmit anything
 785          * anyhow */
 786         if (status)
 787                 handle_usb_error(status, __func__, odev->parent);
 788
 789         hso_put_activity(odev->parent);
 790
 791         /* Tell the network interface we are ready for another frame */
 792         netif_wake_queue(odev->net);
 793 }
 794
 795 /* called by kernel when we need to transmit a packet */
 796 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 797                                             struct net_device *net)
 798 {
 799         struct hso_net *odev = netdev_priv(net);
 800         int result;
 801
 802         /* Tell the kernel, "No more frames 'til we are done with this one." */
 803         netif_stop_queue(net);
 804         if (hso_get_activity(odev->parent) == -EAGAIN) {
 805                 odev->skb_tx_buf = skb;
 806                 return NETDEV_TX_OK;
 807         }
 808
 809         /* log if asked */
 810         DUMP1(skb->data, skb->len);
 811         /* Copy it from kernel memory to OUR memory */
 812         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 813         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 814
 815         /* Fill in the URB for shipping it out. */
 816         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 817                           odev->parent->usb,
 818                           usb_sndbulkpipe(odev->parent->usb,
 819                                           odev->out_endp->
 820                                           bEndpointAddress & 0x7F),
 821                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 822                           odev);
 823
 824         /* Deal with the Zero Length packet problem, I hope */
 825         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 826
 827         /* Send the URB on its merry way. */
 828         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 829         if (result) {
 830                 dev_warn(&odev->parent->interface->dev,
 831                         "failed mux_bulk_tx_urb %d\n", result);
 832                 net->stats.tx_errors++;
 833                 netif_start_queue(net);
 834         } else {
 835                 net->stats.tx_packets++;
 836                 net->stats.tx_bytes += skb->len;
 837                 /* And tell the kernel when the last transmit started. */
 838                 net->trans_start = jiffies;
 839         }
 840         dev_kfree_skb(skb);
 841         /* we're done */
 842         return NETDEV_TX_OK;
 843 }
 844
 845 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 846 {
 847         struct hso_net *odev = netdev_priv(net);
 848
 849         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 850         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 851         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 852 }
 853
 854 static const struct ethtool_ops ops = {
 855         .get_drvinfo = hso_get_drvinfo,
 856         .get_link = ethtool_op_get_link
 857 };
 858
 859 /* called when a packet did not ack after watchdogtimeout */
 860 static void hso_net_tx_timeout(struct net_device *net)
 861 {
 862         struct hso_net *odev = netdev_priv(net);
 863
 864         if (!odev)
 865                 return;
 866
 867         /* Tell syslog we are hosed. */
 868         dev_warn(&net->dev, "Tx timed out.\n");
 869
 870         /* Tear the waiting frame off the list */
 871         if (odev->mux_bulk_tx_urb &&
 872             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 873                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 874
 875         /* Update statistics */
 876         net->stats.tx_errors++;
 877 }
 878
 879 /* make a real packet from the received USB buffer */
 880 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 881                         unsigned int count, unsigned char is_eop)
 882 {
 883         unsigned short temp_bytes;
 884         unsigned short buffer_offset = 0;
 885         unsigned short frame_len;
 886         unsigned char *tmp_rx_buf;
 887
 888         /* log if needed */
 889         D1("Rx %d bytes", count);
 890         DUMP(ip_pkt, min(128, (int)count));
 891
 892         while (count) {
 893                 switch (odev->rx_parse_state) {
 894                 case WAIT_IP:
 895                         /* waiting for IP header. */
 896                         /* wanted bytes - size of ip header */
 897                         temp_bytes =
 898                             (count <
 899                              odev->rx_buf_missing) ? count : odev->
 900                             rx_buf_missing;
 901
 902                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 903                                odev->rx_buf_size, ip_pkt + buffer_offset,
 904                                temp_bytes);
 905
 906                         odev->rx_buf_size += temp_bytes;
 907                         buffer_offset += temp_bytes;
 908                         odev->rx_buf_missing -= temp_bytes;
 909                         count -= temp_bytes;
 910
 911                         if (!odev->rx_buf_missing) {
 912                                 /* header is complete allocate an sk_buffer and
 913                                  * continue to WAIT_DATA */
 914                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 915
 916                                 if ((frame_len > DEFAULT_MRU) ||
 917                                     (frame_len < sizeof(struct iphdr))) {
 918                                         dev_err(&odev->net->dev,
 919                                                 "Invalid frame (%d) length\n",
 920                                                 frame_len);
 921                                         odev->rx_parse_state = WAIT_SYNC;
 922                                         continue;
 923                                 }
 924                                 /* Allocate an sk_buff */
 925                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 926                                                                     frame_len);
 927                                 if (!odev->skb_rx_buf) {
 928                                         /* We got no receive buffer. */
 929                                         D1("could not allocate memory");
 930                                         odev->rx_parse_state = WAIT_SYNC;
 931                                         return;
 932                                 }
 933
 934                                 /* Copy what we got so far. make room for iphdr
 935                                  * after tail. */
 936                                 tmp_rx_buf =
 937                                     skb_put(odev->skb_rx_buf,
 938                                             sizeof(struct iphdr));
 939                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 940                                        sizeof(struct iphdr));
 941
 942                                 /* ETH_HLEN */
 943                                 odev->rx_buf_size = sizeof(struct iphdr);
 944
 945                                 /* Filip actually use .tot_len */
 946                                 odev->rx_buf_missing =
 947                                     frame_len - sizeof(struct iphdr);
 948                                 odev->rx_parse_state = WAIT_DATA;
 949                         }
 950                         break;
 951
 952                 case WAIT_DATA:
 953                         temp_bytes = (count < odev->rx_buf_missing)
 954                                         ? count : odev->rx_buf_missing;
 955
 956                         /* Copy the rest of the bytes that are left in the
 957                          * buffer into the waiting sk_buf. */
 958                         /* Make room for temp_bytes after tail. */
 959                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 960                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 961
 962                         odev->rx_buf_missing -= temp_bytes;
 963                         count -= temp_bytes;
 964                         buffer_offset += temp_bytes;
 965                         odev->rx_buf_size += temp_bytes;
 966                         if (!odev->rx_buf_missing) {
 967                                 /* Packet is complete. Inject into stack. */
 968                                 /* We have IP packet here */
 969                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 970                                 /* don't check it */
 971                                 odev->skb_rx_buf->ip_summed =
 972                                         CHECKSUM_UNNECESSARY;
 973
 974                                 skb_reset_mac_header(odev->skb_rx_buf);
 975
 976                                 /* Ship it off to the kernel */
 977                                 netif_rx(odev->skb_rx_buf);
 978                                 /* No longer our buffer. */
 979                                 odev->skb_rx_buf = NULL;
 980
 981                                 /* update out statistics */
 982                                 odev->net->stats.rx_packets++;
 983
 984                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 985
 986                                 odev->rx_buf_size = 0;
 987                                 odev->rx_buf_missing = sizeof(struct iphdr);
 988                                 odev->rx_parse_state = WAIT_IP;
 989                         }
 990                         break;
 991
 992                 case WAIT_SYNC:
 993                         D1(" W_S");
 994                         count = 0;
 995                         break;
 996                 default:
 997                         D1(" ");
 998                         count--;
 999                         break;
1000                 }
1001         }
1002
1003         /* Recovery mechanism for WAIT_SYNC state. */
1004         if (is_eop) {
1005                 if (odev->rx_parse_state == WAIT_SYNC) {
1006                         odev->rx_parse_state = WAIT_IP;
1007                         odev->rx_buf_size = 0;
1008                         odev->rx_buf_missing = sizeof(struct iphdr);
1009                 }
1010         }
1011 }
1012
1013 /* Moving data from usb to kernel (in interrupt state) */
1014 static void read_bulk_callback(struct urb *urb)
1015 {
1016         struct hso_net *odev = urb->context;
1017         struct net_device *net;
1018         int result;
1019         int status = urb->status;
1020
1021         /* is al ok?  (Filip: Who's Al ?) */
1022         if (status) {
1023                 handle_usb_error(status, __func__, odev->parent);
1024                 return;
1025         }
1026
1027         /* Sanity check */
1028         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1029                 D1("BULK IN callback but driver is not active!");
1030                 return;
1031         }
1032         usb_mark_last_busy(urb->dev);
1033
1034         net = odev->net;
1035
1036         if (!netif_device_present(net)) {
1037                 /* Somebody killed our network interface... */
1038                 return;
1039         }
1040
1041         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1042                 u32 rest;
1043                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1044                 rest = urb->actual_length %
1045                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1046                 if (((rest == 5) || (rest == 6)) &&
1047                     !memcmp(((u8 *) urb->transfer_buffer) +
1048                             urb->actual_length - 4, crc_check, 4)) {
1049                         urb->actual_length -= 4;
1050                 }
1051         }
1052
1053         /* do we even have a packet? */
1054         if (urb->actual_length) {
1055                 /* Handle the IP stream, add header and push it onto network
1056                  * stack if the packet is complete. */
1057                 spin_lock(&odev->net_lock);
1058                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1059                             (urb->transfer_buffer_length >
1060                              urb->actual_length) ? 1 : 0);
1061                 spin_unlock(&odev->net_lock);
1062         }
1063
1064         /* We are done with this URB, resubmit it. Prep the USB to wait for
1065          * another frame. Reuse same as received. */
1066         usb_fill_bulk_urb(urb,
1067                           odev->parent->usb,
1068                           usb_rcvbulkpipe(odev->parent->usb,
1069                                           odev->in_endp->
1070                                           bEndpointAddress & 0x7F),
1071                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1072                           read_bulk_callback, odev);
1073
1074         /* Give this to the USB subsystem so it can tell us when more data
1075          * arrives. */
1076         result = usb_submit_urb(urb, GFP_ATOMIC);
1077         if (result)
1078                 dev_warn(&odev->parent->interface->dev,
1079                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1080                          result);
1081 }
1082
1083 /* Serial driver functions */
1084
1085 static void hso_init_termios(struct ktermios *termios)
1086 {
1087         /*
1088          * The default requirements for this device are:
1089          */
1090         termios->c_iflag &=
1091                 ~(IGNBRK        /* disable ignore break */
1092                 | BRKINT        /* disable break causes interrupt */
1093                 | PARMRK        /* disable mark parity errors */
1094                 | ISTRIP        /* disable clear high bit of input characters */
1095                 | INLCR         /* disable translate NL to CR */
1096                 | IGNCR         /* disable ignore CR */
1097                 | ICRNL         /* disable translate CR to NL */
1098                 | IXON);        /* disable enable XON/XOFF flow control */
1099
1100         /* disable postprocess output characters */
1101         termios->c_oflag &= ~OPOST;
1102
1103         termios->c_lflag &=
1104                 ~(ECHO          /* disable echo input characters */
1105                 | ECHONL        /* disable echo new line */
1106                 | ICANON        /* disable erase, kill, werase, and rprnt
1107                                    special characters */
1108                 | ISIG          /* disable interrupt, quit, and suspend special
1109                                    characters */
1110                 | IEXTEN);      /* disable non-POSIX special characters */
1111
1112         termios->c_cflag &=
1113                 ~(CSIZE         /* no size */
1114                 | PARENB        /* disable parity bit */
1115                 | CBAUD         /* clear current baud rate */
1116                 | CBAUDEX);     /* clear current buad rate */
1117
1118         termios->c_cflag |= CS8;        /* character size 8 bits */
1119
1120         /* baud rate 115200 */
1121         tty_termios_encode_baud_rate(termios, 115200, 115200);
1122 }
1123
1124 static void _hso_serial_set_termios(struct tty_struct *tty,
1125                                     struct ktermios *old)
1126 {
1127         struct hso_serial *serial = get_serial_by_tty(tty);
1128         struct ktermios *termios;
1129
1130         if (!serial) {
1131                 printk(KERN_ERR "%s: no tty structures", __func__);
1132                 return;
1133         }
1134
1135         D4("port %d", serial->minor);
1136
1137         /*
1138          *      Fix up unsupported bits
1139          */
1140         termios = tty->termios;
1141         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1142
1143         termios->c_cflag &=
1144                 ~(CSIZE         /* no size */
1145                 | PARENB        /* disable parity bit */
1146                 | CBAUD         /* clear current baud rate */
1147                 | CBAUDEX);     /* clear current buad rate */
1148
1149         termios->c_cflag |= CS8;        /* character size 8 bits */
1150
1151         /* baud rate 115200 */
1152         tty_encode_baud_rate(tty, 115200, 115200);
1153 }
1154
1155 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1156 {
1157         int result;
1158 #ifdef CONFIG_HSO_AUTOPM
1159         usb_mark_last_busy(urb->dev);
1160 #endif
1161         /* We are done with this URB, resubmit it. Prep the USB to wait for
1162          * another frame */
1163         usb_fill_bulk_urb(urb, serial->parent->usb,
1164                           usb_rcvbulkpipe(serial->parent->usb,
1165                                           serial->in_endp->
1166                                           bEndpointAddress & 0x7F),
1167                           urb->transfer_buffer, serial->rx_data_length,
1168                           hso_std_serial_read_bulk_callback, serial);
1169         /* Give this to the USB subsystem so it can tell us when more data
1170          * arrives. */
1171         result = usb_submit_urb(urb, GFP_ATOMIC);
1172         if (result) {
1173                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1174                         __func__, result);
1175         }
1176 }
1177
1178
1179
1180
1181 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1182 {
1183         int count;
1184         struct urb *curr_urb;
1185
1186         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1187                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1188                 count = put_rxbuf_data(curr_urb, serial);
1189                 if (count == -1)
1190                         return;
1191                 if (count == 0) {
1192                         serial->curr_rx_urb_idx++;
1193                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1194                                 serial->curr_rx_urb_idx = 0;
1195                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1196                 }
1197         }
1198 }
1199
1200 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1201 {
1202         int count = 0;
1203         struct urb *urb;
1204
1205         urb = serial->rx_urb[0];
1206         if (serial->open_count > 0) {
1207                 count = put_rxbuf_data(urb, serial);
1208                 if (count == -1)
1209                         return;
1210         }
1211         /* Re issue a read as long as we receive data. */
1212
1213         if (count == 0 && ((urb->actual_length != 0) ||
1214                            (serial->rx_state == RX_PENDING))) {
1215                 serial->rx_state = RX_SENT;
1216                 hso_mux_serial_read(serial);
1217         } else
1218                 serial->rx_state = RX_IDLE;
1219 }
1220
1221
1222 /* read callback for Diag and CS port */
1223 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1224 {
1225         struct hso_serial *serial = urb->context;
1226         int status = urb->status;
1227
1228         /* sanity check */
1229         if (!serial) {
1230                 D1("serial == NULL");
1231                 return;
1232         } else if (status) {
1233                 handle_usb_error(status, __func__, serial->parent);
1234                 return;
1235         }
1236
1237         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1238         D1("Actual length = %d\n", urb->actual_length);
1239         DUMP1(urb->transfer_buffer, urb->actual_length);
1240
1241         /* Anyone listening? */
1242         if (serial->open_count == 0)
1243                 return;
1244
1245         if (status == 0) {
1246                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1247                         u32 rest;
1248                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1249                         rest =
1250                             urb->actual_length %
1251                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1252                         if (((rest == 5) || (rest == 6)) &&
1253                             !memcmp(((u8 *) urb->transfer_buffer) +
1254                                     urb->actual_length - 4, crc_check, 4)) {
1255                                 urb->actual_length -= 4;
1256                         }
1257                 }
1258                 /* Valid data, handle RX data */
1259                 spin_lock(&serial->serial_lock);
1260                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1261                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1262                 spin_unlock(&serial->serial_lock);
1263         } else if (status == -ENOENT || status == -ECONNRESET) {
1264                 /* Unlinked - check for throttled port. */
1265                 D2("Port %d, successfully unlinked urb", serial->minor);
1266                 spin_lock(&serial->serial_lock);
1267                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1268                 hso_resubmit_rx_bulk_urb(serial, urb);
1269                 spin_unlock(&serial->serial_lock);
1270         } else {
1271                 D2("Port %d, status = %d for read urb", serial->minor, status);
1272                 return;
1273         }
1274 }
1275
1276 /*
1277  * This needs to be a tasklet otherwise we will
1278  * end up recursively calling this function.
1279  */
1280 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1281 {
1282         unsigned long flags;
1283
1284         spin_lock_irqsave(&serial->serial_lock, flags);
1285         if ((serial->parent->port_spec & HSO_INTF_MUX))
1286                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1287         else
1288                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1289         spin_unlock_irqrestore(&serial->serial_lock, flags);
1290 }
1291
1292 static  void hso_unthrottle(struct tty_struct *tty)
1293 {
1294         struct hso_serial *serial = get_serial_by_tty(tty);
1295
1296         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1297 }
1298
1299 static void hso_unthrottle_workfunc(struct work_struct *work)
1300 {
1301         struct hso_serial *serial =
1302             container_of(work, struct hso_serial,
1303                          retry_unthrottle_workqueue);
1304         hso_unthrottle_tasklet(serial);
1305 }
1306
1307 /* open the requested serial port */
1308 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1309 {
1310         struct hso_serial *serial = get_serial_by_index(tty->index);
1311         int result;
1312
1313         /* sanity check */
1314         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1315                 WARN_ON(1);
1316                 tty->driver_data = NULL;
1317                 D1("Failed to open port");
1318                 return -ENODEV;
1319         }
1320
1321         mutex_lock(&serial->parent->mutex);
1322         result = usb_autopm_get_interface(serial->parent->interface);
1323         if (result < 0)
1324                 goto err_out;
1325
1326         D1("Opening %d", serial->minor);
1327         kref_get(&serial->parent->ref);
1328
1329         /* setup */
1330         spin_lock_irq(&serial->serial_lock);
1331         tty->driver_data = serial;
1332         tty_kref_put(serial->tty);
1333         serial->tty = tty_kref_get(tty);
1334         spin_unlock_irq(&serial->serial_lock);
1335
1336         /* check for port already opened, if not set the termios */
1337         serial->open_count++;
1338         if (serial->open_count == 1) {
1339                 tty->low_latency = 1;
1340                 serial->rx_state = RX_IDLE;
1341                 /* Force default termio settings */
1342                 _hso_serial_set_termios(tty, NULL);
1343                 tasklet_init(&serial->unthrottle_tasklet,
1344                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1345                              (unsigned long)serial);
1346                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1347                           hso_unthrottle_workfunc);
1348                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1349                 if (result) {
1350                         hso_stop_serial_device(serial->parent);
1351                         serial->open_count--;
1352                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1353                 }
1354         } else {
1355                 D1("Port was already open");
1356         }
1357
1358         usb_autopm_put_interface(serial->parent->interface);
1359
1360         /* done */
1361         if (result)
1362                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1363 err_out:
1364         mutex_unlock(&serial->parent->mutex);
1365         return result;
1366 }
1367
1368 /* close the requested serial port */
1369 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1370 {
1371         struct hso_serial *serial = tty->driver_data;
1372         u8 usb_gone;
1373
1374         D1("Closing serial port");
1375
1376         /* Open failed, no close cleanup required */
1377         if (serial == NULL)
1378                 return;
1379
1380         mutex_lock(&serial->parent->mutex);
1381         usb_gone = serial->parent->usb_gone;
1382
1383         if (!usb_gone)
1384                 usb_autopm_get_interface(serial->parent->interface);
1385
1386         /* reset the rts and dtr */
1387         /* do the actual close */
1388         serial->open_count--;
1389
1390         if (serial->open_count <= 0) {
1391                 serial->open_count = 0;
1392                 spin_lock_irq(&serial->serial_lock);
1393                 if (serial->tty == tty) {
1394                         serial->tty->driver_data = NULL;
1395                         serial->tty = NULL;
1396                         tty_kref_put(tty);
1397                 }
1398                 spin_unlock_irq(&serial->serial_lock);
1399                 if (!usb_gone)
1400                         hso_stop_serial_device(serial->parent);
1401                 tasklet_kill(&serial->unthrottle_tasklet);
1402                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1403         }
1404
1405         if (!usb_gone)
1406                 usb_autopm_put_interface(serial->parent->interface);
1407
1408         mutex_unlock(&serial->parent->mutex);
1409
1410         kref_put(&serial->parent->ref, hso_serial_ref_free);
1411 }
1412
1413 /* close the requested serial port */
1414 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1415                             int count)
1416 {
1417         struct hso_serial *serial = get_serial_by_tty(tty);
1418         int space, tx_bytes;
1419         unsigned long flags;
1420
1421         /* sanity check */
1422         if (serial == NULL) {
1423                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1424                 return -ENODEV;
1425         }
1426
1427         spin_lock_irqsave(&serial->serial_lock, flags);
1428
1429         space = serial->tx_data_length - serial->tx_buffer_count;
1430         tx_bytes = (count < space) ? count : space;
1431
1432         if (!tx_bytes)
1433                 goto out;
1434
1435         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1436         serial->tx_buffer_count += tx_bytes;
1437
1438 out:
1439         spin_unlock_irqrestore(&serial->serial_lock, flags);
1440
1441         hso_kick_transmit(serial);
1442         /* done */
1443         return tx_bytes;
1444 }
1445
1446 /* how much room is there for writing */
1447 static int hso_serial_write_room(struct tty_struct *tty)
1448 {
1449         struct hso_serial *serial = get_serial_by_tty(tty);
1450         int room;
1451         unsigned long flags;
1452
1453         spin_lock_irqsave(&serial->serial_lock, flags);
1454         room = serial->tx_data_length - serial->tx_buffer_count;
1455         spin_unlock_irqrestore(&serial->serial_lock, flags);
1456
1457         /* return free room */
1458         return room;
1459 }
1460
1461 /* setup the term */
1462 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1463 {
1464         struct hso_serial *serial = get_serial_by_tty(tty);
1465         unsigned long flags;
1466
1467         if (old)
1468                 D5("Termios called with: cflags new[%d] - old[%d]",
1469                    tty->termios->c_cflag, old->c_cflag);
1470
1471         /* the actual setup */
1472         spin_lock_irqsave(&serial->serial_lock, flags);
1473         if (serial->open_count)
1474                 _hso_serial_set_termios(tty, old);
1475         else
1476                 tty->termios = old;
1477         spin_unlock_irqrestore(&serial->serial_lock, flags);
1478
1479         /* done */
1480         return;
1481 }
1482
1483 /* how many characters in the buffer */
1484 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1485 {
1486         struct hso_serial *serial = get_serial_by_tty(tty);
1487         int chars;
1488         unsigned long flags;
1489
1490         /* sanity check */
1491         if (serial == NULL)
1492                 return 0;
1493
1494         spin_lock_irqsave(&serial->serial_lock, flags);
1495         chars = serial->tx_buffer_count;
1496         spin_unlock_irqrestore(&serial->serial_lock, flags);
1497
1498         return chars;
1499 }
1500 static int tiocmget_submit_urb(struct hso_serial *serial,
1501                                struct hso_tiocmget *tiocmget,
1502                                struct usb_device *usb)
1503 {
1504         int result;
1505
1506         if (serial->parent->usb_gone)
1507                 return -ENODEV;
1508         usb_fill_int_urb(tiocmget->urb, usb,
1509                          usb_rcvintpipe(usb,
1510                                         tiocmget->endp->
1511                                         bEndpointAddress & 0x7F),
1512                          &tiocmget->serial_state_notification,
1513                          sizeof(struct hso_serial_state_notification),
1514                          tiocmget_intr_callback, serial,
1515                          tiocmget->endp->bInterval);
1516         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1517         if (result) {
1518                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1519                          result);
1520         }
1521         return result;
1522
1523 }
1524
1525 static void tiocmget_intr_callback(struct urb *urb)
1526 {
1527         struct hso_serial *serial = urb->context;
1528         struct hso_tiocmget *tiocmget;
1529         int status = urb->status;
1530         u16 UART_state_bitmap, prev_UART_state_bitmap;
1531         struct uart_icount *icount;
1532         struct hso_serial_state_notification *serial_state_notification;
1533         struct usb_device *usb;
1534
1535         /* Sanity checks */
1536         if (!serial)
1537                 return;
1538         if (status) {
1539                 handle_usb_error(status, __func__, serial->parent);
1540                 return;
1541         }
1542         tiocmget = serial->tiocmget;
1543         if (!tiocmget)
1544                 return;
1545         usb = serial->parent->usb;
1546         serial_state_notification = &tiocmget->serial_state_notification;
1547         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1548             serial_state_notification->bNotification != B_NOTIFICATION ||
1549             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1550             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1551             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1552                 dev_warn(&usb->dev,
1553                          "hso received invalid serial state notification\n");
1554                 DUMP(serial_state_notification,
1555                      sizeof(struct hso_serial_state_notification));
1556         } else {
1557
1558                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1559                                                 UART_state_bitmap);
1560                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1561                 icount = &tiocmget->icount;
1562                 spin_lock(&serial->serial_lock);
1563                 if ((UART_state_bitmap & B_OVERRUN) !=
1564                    (prev_UART_state_bitmap & B_OVERRUN))
1565                         icount->parity++;
1566                 if ((UART_state_bitmap & B_PARITY) !=
1567                    (prev_UART_state_bitmap & B_PARITY))
1568                         icount->parity++;
1569                 if ((UART_state_bitmap & B_FRAMING) !=
1570                    (prev_UART_state_bitmap & B_FRAMING))
1571                         icount->frame++;
1572                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1573                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1574                         icount->rng++;
1575                 if ((UART_state_bitmap & B_BREAK) !=
1576                    (prev_UART_state_bitmap & B_BREAK))
1577                         icount->brk++;
1578                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1579                    (prev_UART_state_bitmap & B_TX_CARRIER))
1580                         icount->dsr++;
1581                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1582                    (prev_UART_state_bitmap & B_RX_CARRIER))
1583                         icount->dcd++;
1584                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1585                 spin_unlock(&serial->serial_lock);
1586                 tiocmget->intr_completed = 1;
1587                 wake_up_interruptible(&tiocmget->waitq);
1588         }
1589         memset(serial_state_notification, 0,
1590                sizeof(struct hso_serial_state_notification));
1591         tiocmget_submit_urb(serial,
1592                             tiocmget,
1593                             serial->parent->usb);
1594 }
1595
1596 /*
1597  * next few functions largely stolen from drivers/serial/serial_core.c
1598  */
1599 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1600  * - mask passed in arg for lines of interest
1601  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1602  * Caller should use TIOCGICOUNT to see which one it was
1603  */
1604 static int
1605 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1606 {
1607         DECLARE_WAITQUEUE(wait, current);
1608         struct uart_icount cprev, cnow;
1609         struct hso_tiocmget  *tiocmget;
1610         int ret;
1611
1612         tiocmget = serial->tiocmget;
1613         if (!tiocmget)
1614                 return -ENOENT;
1615         /*
1616          * note the counters on entry
1617          */
1618         spin_lock_irq(&serial->serial_lock);
1619         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1620         spin_unlock_irq(&serial->serial_lock);
1621         add_wait_queue(&tiocmget->waitq, &wait);
1622         for (;;) {
1623                 spin_lock_irq(&serial->serial_lock);
1624                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1625                 spin_unlock_irq(&serial->serial_lock);
1626                 set_current_state(TASK_INTERRUPTIBLE);
1627                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1628                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1629                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1630                         ret = 0;
1631                         break;
1632                 }
1633                 schedule();
1634                 /* see if a signal did it */
1635                 if (signal_pending(current)) {
1636                         ret = -ERESTARTSYS;
1637                         break;
1638                 }
1639                 cprev = cnow;
1640         }
1641         current->state = TASK_RUNNING;
1642         remove_wait_queue(&tiocmget->waitq, &wait);
1643
1644         return ret;
1645 }
1646
1647 /*
1648  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1649  * Return: write counters to the user passed counter struct
1650  * NB: both 1->0 and 0->1 transitions are counted except for
1651  *     RI where only 0->1 is counted.
1652  */
1653 static int hso_get_count(struct hso_serial *serial,
1654                           struct serial_icounter_struct __user *icnt)
1655 {
1656         struct serial_icounter_struct icount;
1657         struct uart_icount cnow;
1658         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1659
1660         if (!tiocmget)
1661                  return -ENOENT;
1662         spin_lock_irq(&serial->serial_lock);
1663         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1664         spin_unlock_irq(&serial->serial_lock);
1665
1666         icount.cts         = cnow.cts;
1667         icount.dsr         = cnow.dsr;
1668         icount.rng         = cnow.rng;
1669         icount.dcd         = cnow.dcd;
1670         icount.rx          = cnow.rx;
1671         icount.tx          = cnow.tx;
1672         icount.frame       = cnow.frame;
1673         icount.overrun     = cnow.overrun;
1674         icount.parity      = cnow.parity;
1675         icount.brk         = cnow.brk;
1676         icount.buf_overrun = cnow.buf_overrun;
1677
1678         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1679 }
1680
1681
1682 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1683 {
1684         int retval;
1685         struct hso_serial *serial = get_serial_by_tty(tty);
1686         struct hso_tiocmget  *tiocmget;
1687         u16 UART_state_bitmap;
1688
1689         /* sanity check */
1690         if (!serial) {
1691                 D1("no tty structures");
1692                 return -EINVAL;
1693         }
1694         spin_lock_irq(&serial->serial_lock);
1695         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1696             ((serial->dtr_state) ? TIOCM_DTR : 0);
1697         tiocmget = serial->tiocmget;
1698         if (tiocmget) {
1699
1700                 UART_state_bitmap = le16_to_cpu(
1701                         tiocmget->prev_UART_state_bitmap);
1702                 if (UART_state_bitmap & B_RING_SIGNAL)
1703                         retval |=  TIOCM_RNG;
1704                 if (UART_state_bitmap & B_RX_CARRIER)
1705                         retval |=  TIOCM_CD;
1706                 if (UART_state_bitmap & B_TX_CARRIER)
1707                         retval |=  TIOCM_DSR;
1708         }
1709         spin_unlock_irq(&serial->serial_lock);
1710         return retval;
1711 }
1712
1713 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1714                                unsigned int set, unsigned int clear)
1715 {
1716         int val = 0;
1717         unsigned long flags;
1718         int if_num;
1719         struct hso_serial *serial = get_serial_by_tty(tty);
1720
1721         /* sanity check */
1722         if (!serial) {
1723                 D1("no tty structures");
1724                 return -EINVAL;
1725         }
1726
1727         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1728                 return -EINVAL;
1729
1730         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1731
1732         spin_lock_irqsave(&serial->serial_lock, flags);
1733         if (set & TIOCM_RTS)
1734                 serial->rts_state = 1;
1735         if (set & TIOCM_DTR)
1736                 serial->dtr_state = 1;
1737
1738         if (clear & TIOCM_RTS)
1739                 serial->rts_state = 0;
1740         if (clear & TIOCM_DTR)
1741                 serial->dtr_state = 0;
1742
1743         if (serial->dtr_state)
1744                 val |= 0x01;
1745         if (serial->rts_state)
1746                 val |= 0x02;
1747
1748         spin_unlock_irqrestore(&serial->serial_lock, flags);
1749
1750         return usb_control_msg(serial->parent->usb,
1751                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1752                                0x21, val, if_num, NULL, 0,
1753                                USB_CTRL_SET_TIMEOUT);
1754 }
1755
1756 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1757                             unsigned int cmd, unsigned long arg)
1758 {
1759         struct hso_serial *serial =  get_serial_by_tty(tty);
1760         void __user *uarg = (void __user *)arg;
1761         int ret = 0;
1762         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1763
1764         if (!serial)
1765                 return -ENODEV;
1766         switch (cmd) {
1767         case TIOCMIWAIT:
1768                 ret = hso_wait_modem_status(serial, arg);
1769                 break;
1770
1771         case TIOCGICOUNT:
1772                 ret = hso_get_count(serial, uarg);
1773                 break;
1774         default:
1775                 ret = -ENOIOCTLCMD;
1776                 break;
1777         }
1778         return ret;
1779 }
1780
1781
1782 /* starts a transmit */
1783 static void hso_kick_transmit(struct hso_serial *serial)
1784 {
1785         u8 *temp;
1786         unsigned long flags;
1787         int res;
1788
1789         spin_lock_irqsave(&serial->serial_lock, flags);
1790         if (!serial->tx_buffer_count)
1791                 goto out;
1792
1793         if (serial->tx_urb_used)
1794                 goto out;
1795
1796         /* Wakeup USB interface if necessary */
1797         if (hso_get_activity(serial->parent) == -EAGAIN)
1798                 goto out;
1799
1800         /* Switch pointers around to avoid memcpy */
1801         temp = serial->tx_buffer;
1802         serial->tx_buffer = serial->tx_data;
1803         serial->tx_data = temp;
1804         serial->tx_data_count = serial->tx_buffer_count;
1805         serial->tx_buffer_count = 0;
1806
1807         /* If temp is set, it means we switched buffers */
1808         if (temp && serial->write_data) {
1809                 res = serial->write_data(serial);
1810                 if (res >= 0)
1811                         serial->tx_urb_used = 1;
1812         }
1813 out:
1814         spin_unlock_irqrestore(&serial->serial_lock, flags);
1815 }
1816
1817 /* make a request (for reading and writing data to muxed serial port) */
1818 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1819                               struct urb *ctrl_urb,
1820                               struct usb_ctrlrequest *ctrl_req,
1821                               u8 *ctrl_urb_data, u32 size)
1822 {
1823         int result;
1824         int pipe;
1825
1826         /* Sanity check */
1827         if (!serial || !ctrl_urb || !ctrl_req) {
1828                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1829                 return -EINVAL;
1830         }
1831
1832         /* initialize */
1833         ctrl_req->wValue = 0;
1834         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1835         ctrl_req->wLength = cpu_to_le16(size);
1836
1837         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1838                 /* Reading command */
1839                 ctrl_req->bRequestType = USB_DIR_IN |
1840                                          USB_TYPE_OPTION_VENDOR |
1841                                          USB_RECIP_INTERFACE;
1842                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1843                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1844         } else {
1845                 /* Writing command */
1846                 ctrl_req->bRequestType = USB_DIR_OUT |
1847                                          USB_TYPE_OPTION_VENDOR |
1848                                          USB_RECIP_INTERFACE;
1849                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1850                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1851         }
1852         /* syslog */
1853         D2("%s command (%02x) len: %d, port: %d",
1854            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1855            ctrl_req->bRequestType, ctrl_req->wLength, port);
1856
1857         /* Load ctrl urb */
1858         ctrl_urb->transfer_flags = 0;
1859         usb_fill_control_urb(ctrl_urb,
1860                              serial->parent->usb,
1861                              pipe,
1862                              (u8 *) ctrl_req,
1863                              ctrl_urb_data, size, ctrl_callback, serial);
1864         /* Send it on merry way */
1865         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1866         if (result) {
1867                 dev_err(&ctrl_urb->dev->dev,
1868                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1869                         result, type);
1870                 return result;
1871         }
1872
1873         /* done */
1874         return size;
1875 }
1876
1877 /* called by intr_callback when read occurs */
1878 static int hso_mux_serial_read(struct hso_serial *serial)
1879 {
1880         if (!serial)
1881                 return -EINVAL;
1882
1883         /* clean data */
1884         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1885         /* make the request */
1886
1887         if (serial->num_rx_urbs != 1) {
1888                 dev_err(&serial->parent->interface->dev,
1889                         "ERROR: mux'd reads with multiple buffers "
1890                         "not possible\n");
1891                 return 0;
1892         }
1893         return mux_device_request(serial,
1894                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1895                                   serial->parent->port_spec & HSO_PORT_MASK,
1896                                   serial->rx_urb[0],
1897                                   &serial->ctrl_req_rx,
1898                                   serial->rx_data[0], serial->rx_data_length);
1899 }
1900
1901 /* used for muxed serial port callback (muxed serial read) */
1902 static void intr_callback(struct urb *urb)
1903 {
1904         struct hso_shared_int *shared_int = urb->context;
1905         struct hso_serial *serial;
1906         unsigned char *port_req;
1907         int status = urb->status;
1908         int i;
1909
1910         usb_mark_last_busy(urb->dev);
1911
1912         /* sanity check */
1913         if (!shared_int)
1914                 return;
1915
1916         /* status check */
1917         if (status) {
1918                 handle_usb_error(status, __func__, NULL);
1919                 return;
1920         }
1921         D4("\n--- Got intr callback 0x%02X ---", status);
1922
1923         /* what request? */
1924         port_req = urb->transfer_buffer;
1925         D4(" port_req = 0x%.2X\n", *port_req);
1926         /* loop over all muxed ports to find the one sending this */
1927         for (i = 0; i < 8; i++) {
1928                 /* max 8 channels on MUX */
1929                 if (*port_req & (1 << i)) {
1930                         serial = get_serial_by_shared_int_and_type(shared_int,
1931                                                                    (1 << i));
1932                         if (serial != NULL) {
1933                                 D1("Pending read interrupt on port %d\n", i);
1934                                 spin_lock(&serial->serial_lock);
1935                                 if (serial->rx_state == RX_IDLE &&
1936                                         serial->open_count > 0) {
1937                                         /* Setup and send a ctrl req read on
1938                                          * port i */
1939                                         if (!serial->rx_urb_filled[0]) {
1940                                                 serial->rx_state = RX_SENT;
1941                                                 hso_mux_serial_read(serial);
1942                                         } else
1943                                                 serial->rx_state = RX_PENDING;
1944                                 } else {
1945                                         D1("Already a read pending on "
1946                                            "port %d or port not open\n", i);
1947                                 }
1948                                 spin_unlock(&serial->serial_lock);
1949                         }
1950                 }
1951         }
1952         /* Resubmit interrupt urb */
1953         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1954 }
1955
1956 /* called for writing to muxed serial port */
1957 static int hso_mux_serial_write_data(struct hso_serial *serial)
1958 {
1959         if (NULL == serial)
1960                 return -EINVAL;
1961
1962         return mux_device_request(serial,
1963                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1964                                   serial->parent->port_spec & HSO_PORT_MASK,
1965                                   serial->tx_urb,
1966                                   &serial->ctrl_req_tx,
1967                                   serial->tx_data, serial->tx_data_count);
1968 }
1969
1970 /* write callback for Diag and CS port */
1971 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1972 {
1973         struct hso_serial *serial = urb->context;
1974         int status = urb->status;
1975         struct tty_struct *tty;
1976
1977         /* sanity check */
1978         if (!serial) {
1979                 D1("serial == NULL");
1980                 return;
1981         }
1982
1983         spin_lock(&serial->serial_lock);
1984         serial->tx_urb_used = 0;
1985         tty = tty_kref_get(serial->tty);
1986         spin_unlock(&serial->serial_lock);
1987         if (status) {
1988                 handle_usb_error(status, __func__, serial->parent);
1989                 tty_kref_put(tty);
1990                 return;
1991         }
1992         hso_put_activity(serial->parent);
1993         if (tty) {
1994                 tty_wakeup(tty);
1995                 tty_kref_put(tty);
1996         }
1997         hso_kick_transmit(serial);
1998
1999         D1(" ");
2000         return;
2001 }
2002
2003 /* called for writing diag or CS serial port */
2004 static int hso_std_serial_write_data(struct hso_serial *serial)
2005 {
2006         int count = serial->tx_data_count;
2007         int result;
2008
2009         usb_fill_bulk_urb(serial->tx_urb,
2010                           serial->parent->usb,
2011                           usb_sndbulkpipe(serial->parent->usb,
2012                                           serial->out_endp->
2013                                           bEndpointAddress & 0x7F),
2014                           serial->tx_data, serial->tx_data_count,
2015                           hso_std_serial_write_bulk_callback, serial);
2016
2017         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2018         if (result) {
2019                 dev_warn(&serial->parent->usb->dev,
2020                          "Failed to submit urb - res %d\n", result);
2021                 return result;
2022         }
2023
2024         return count;
2025 }
2026
2027 /* callback after read or write on muxed serial port */
2028 static void ctrl_callback(struct urb *urb)
2029 {
2030         struct hso_serial *serial = urb->context;
2031         struct usb_ctrlrequest *req;
2032         int status = urb->status;
2033         struct tty_struct *tty;
2034
2035         /* sanity check */
2036         if (!serial)
2037                 return;
2038
2039         spin_lock(&serial->serial_lock);
2040         serial->tx_urb_used = 0;
2041         tty = tty_kref_get(serial->tty);
2042         spin_unlock(&serial->serial_lock);
2043         if (status) {
2044                 handle_usb_error(status, __func__, serial->parent);
2045                 tty_kref_put(tty);
2046                 return;
2047         }
2048
2049         /* what request? */
2050         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2051         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2052         D4("Actual length of urb = %d\n", urb->actual_length);
2053         DUMP1(urb->transfer_buffer, urb->actual_length);
2054
2055         if (req->bRequestType ==
2056             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2057                 /* response to a read command */
2058                 serial->rx_urb_filled[0] = 1;
2059                 spin_lock(&serial->serial_lock);
2060                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2061                 spin_unlock(&serial->serial_lock);
2062         } else {
2063                 hso_put_activity(serial->parent);
2064                 if (tty)
2065                         tty_wakeup(tty);
2066                 /* response to a write command */
2067                 hso_kick_transmit(serial);
2068         }
2069         tty_kref_put(tty);
2070 }
2071
2072 /* handle RX data for serial port */
2073 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2074 {
2075         struct tty_struct *tty;
2076         int write_length_remaining = 0;
2077         int curr_write_len;
2078
2079         /* Sanity check */
2080         if (urb == NULL || serial == NULL) {
2081                 D1("serial = NULL");
2082                 return -2;
2083         }
2084
2085         /* All callers to put_rxbuf_data hold serial_lock */
2086         tty = tty_kref_get(serial->tty);
2087
2088         /* Push data to tty */
2089         if (tty) {
2090                 write_length_remaining = urb->actual_length -
2091                         serial->curr_rx_urb_offset;
2092                 D1("data to push to tty");
2093                 while (write_length_remaining) {
2094                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2095                                 tty_kref_put(tty);
2096                                 return -1;
2097                         }
2098                         curr_write_len =  tty_insert_flip_string
2099                                 (tty, urb->transfer_buffer +
2100                                  serial->curr_rx_urb_offset,
2101                                  write_length_remaining);
2102                         serial->curr_rx_urb_offset += curr_write_len;
2103                         write_length_remaining -= curr_write_len;
2104                         tty_flip_buffer_push(tty);
2105                 }
2106         }
2107         if (write_length_remaining == 0) {
2108                 serial->curr_rx_urb_offset = 0;
2109                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2110         }
2111         tty_kref_put(tty);
2112         return write_length_remaining;
2113 }
2114
2115
2116 /* Base driver functions */
2117
2118 static void hso_log_port(struct hso_device *hso_dev)
2119 {
2120         char *port_type;
2121         char port_dev[20];
2122
2123         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2124         case HSO_PORT_CONTROL:
2125                 port_type = "Control";
2126                 break;
2127         case HSO_PORT_APP:
2128                 port_type = "Application";
2129                 break;
2130         case HSO_PORT_GPS:
2131                 port_type = "GPS";
2132                 break;
2133         case HSO_PORT_GPS_CONTROL:
2134                 port_type = "GPS control";
2135                 break;
2136         case HSO_PORT_APP2:
2137                 port_type = "Application2";
2138                 break;
2139         case HSO_PORT_PCSC:
2140                 port_type = "PCSC";
2141                 break;
2142         case HSO_PORT_DIAG:
2143                 port_type = "Diagnostic";
2144                 break;
2145         case HSO_PORT_DIAG2:
2146                 port_type = "Diagnostic2";
2147                 break;
2148         case HSO_PORT_MODEM:
2149                 port_type = "Modem";
2150                 break;
2151         case HSO_PORT_NETWORK:
2152                 port_type = "Network";
2153                 break;
2154         default:
2155                 port_type = "Unknown";
2156                 break;
2157         }
2158         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2159                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2160         } else
2161                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2162                         dev2ser(hso_dev)->minor);
2163
2164         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2165                 port_type, port_dev);
2166 }
2167
2168 static int hso_start_net_device(struct hso_device *hso_dev)
2169 {
2170         int i, result = 0;
2171         struct hso_net *hso_net = dev2net(hso_dev);
2172
2173         if (!hso_net)
2174                 return -ENODEV;
2175
2176         /* send URBs for all read buffers */
2177         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2178
2179                 /* Prep a receive URB */
2180                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2181                                   hso_dev->usb,
2182                                   usb_rcvbulkpipe(hso_dev->usb,
2183                                                   hso_net->in_endp->
2184                                                   bEndpointAddress & 0x7F),
2185                                   hso_net->mux_bulk_rx_buf_pool[i],
2186                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2187                                   hso_net);
2188
2189                 /* Put it out there so the device can send us stuff */
2190                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2191                                         GFP_NOIO);
2192                 if (result)
2193                         dev_warn(&hso_dev->usb->dev,
2194                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2195                                 i, result);
2196         }
2197
2198         return result;
2199 }
2200
2201 static int hso_stop_net_device(struct hso_device *hso_dev)
2202 {
2203         int i;
2204         struct hso_net *hso_net = dev2net(hso_dev);
2205
2206         if (!hso_net)
2207                 return -ENODEV;
2208
2209         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2210                 if (hso_net->mux_bulk_rx_urb_pool[i])
2211                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2212
2213         }
2214         if (hso_net->mux_bulk_tx_urb)
2215                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2216
2217         return 0;
2218 }
2219
2220 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2221 {
2222         int i, result = 0;
2223         struct hso_serial *serial = dev2ser(hso_dev);
2224
2225         if (!serial)
2226                 return -ENODEV;
2227
2228         /* If it is not the MUX port fill in and submit a bulk urb (already
2229          * allocated in hso_serial_start) */
2230         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2231                 for (i = 0; i < serial->num_rx_urbs; i++) {
2232                         usb_fill_bulk_urb(serial->rx_urb[i],
2233                                           serial->parent->usb,
2234                                           usb_rcvbulkpipe(serial->parent->usb,
2235                                                           serial->in_endp->
2236                                                           bEndpointAddress &
2237                                                           0x7F),
2238                                           serial->rx_data[i],
2239                                           serial->rx_data_length,
2240                                           hso_std_serial_read_bulk_callback,
2241                                           serial);
2242                         result = usb_submit_urb(serial->rx_urb[i], flags);
2243                         if (result) {
2244                                 dev_warn(&serial->parent->usb->dev,
2245                                          "Failed to submit urb - res %d\n",
2246                                          result);
2247                                 break;
2248                         }
2249                 }
2250         } else {
2251                 mutex_lock(&serial->shared_int->shared_int_lock);
2252                 if (!serial->shared_int->use_count) {
2253                         result =
2254                             hso_mux_submit_intr_urb(serial->shared_int,
2255                                                     hso_dev->usb, flags);
2256                 }
2257                 serial->shared_int->use_count++;
2258                 mutex_unlock(&serial->shared_int->shared_int_lock);
2259         }
2260         if (serial->tiocmget)
2261                 tiocmget_submit_urb(serial,
2262                                     serial->tiocmget,
2263                                     serial->parent->usb);
2264         return result;
2265 }
2266
2267 static int hso_stop_serial_device(struct hso_device *hso_dev)
2268 {
2269         int i;
2270         struct hso_serial *serial = dev2ser(hso_dev);
2271         struct hso_tiocmget  *tiocmget;
2272
2273         if (!serial)
2274                 return -ENODEV;
2275
2276         for (i = 0; i < serial->num_rx_urbs; i++) {
2277                 if (serial->rx_urb[i]) {
2278                                 usb_kill_urb(serial->rx_urb[i]);
2279                                 serial->rx_urb_filled[i] = 0;
2280                 }
2281         }
2282         serial->curr_rx_urb_idx = 0;
2283         serial->curr_rx_urb_offset = 0;
2284
2285         if (serial->tx_urb)
2286                 usb_kill_urb(serial->tx_urb);
2287
2288         if (serial->shared_int) {
2289                 mutex_lock(&serial->shared_int->shared_int_lock);
2290                 if (serial->shared_int->use_count &&
2291                     (--serial->shared_int->use_count == 0)) {
2292                         struct urb *urb;
2293
2294                         urb = serial->shared_int->shared_intr_urb;
2295                         if (urb)
2296                                 usb_kill_urb(urb);
2297                 }
2298                 mutex_unlock(&serial->shared_int->shared_int_lock);
2299         }
2300         tiocmget = serial->tiocmget;
2301         if (tiocmget) {
2302                 wake_up_interruptible(&tiocmget->waitq);
2303                 usb_kill_urb(tiocmget->urb);
2304         }
2305
2306         return 0;
2307 }
2308
2309 static void hso_serial_common_free(struct hso_serial *serial)
2310 {
2311         int i;
2312
2313         if (serial->parent->dev)
2314                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2315
2316         tty_unregister_device(tty_drv, serial->minor);
2317
2318         for (i = 0; i < serial->num_rx_urbs; i++) {
2319                 /* unlink and free RX URB */
2320                 usb_free_urb(serial->rx_urb[i]);
2321                 /* free the RX buffer */
2322                 kfree(serial->rx_data[i]);
2323         }
2324
2325         /* unlink and free TX URB */
2326         usb_free_urb(serial->tx_urb);
2327         kfree(serial->tx_data);
2328 }
2329
2330 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2331                                     int rx_size, int tx_size)
2332 {
2333         struct device *dev;
2334         int minor;
2335         int i;
2336
2337         minor = get_free_serial_index();
2338         if (minor < 0)
2339                 goto exit;
2340
2341         /* register our minor number */
2342         serial->parent->dev = tty_register_device(tty_drv, minor,
2343                                         &serial->parent->interface->dev);
2344         dev = serial->parent->dev;
2345         dev_set_drvdata(dev, serial->parent);
2346         i = device_create_file(dev, &dev_attr_hsotype);
2347
2348         /* fill in specific data for later use */
2349         serial->minor = minor;
2350         serial->magic = HSO_SERIAL_MAGIC;
2351         spin_lock_init(&serial->serial_lock);
2352         serial->num_rx_urbs = num_urbs;
2353
2354         /* RX, allocate urb and initialize */
2355
2356         /* prepare our RX buffer */
2357         serial->rx_data_length = rx_size;
2358         for (i = 0; i < serial->num_rx_urbs; i++) {
2359                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2360                 if (!serial->rx_urb[i]) {
2361                         dev_err(dev, "Could not allocate urb?\n");
2362                         goto exit;
2363                 }
2364                 serial->rx_urb[i]->transfer_buffer = NULL;
2365                 serial->rx_urb[i]->transfer_buffer_length = 0;
2366                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2367                                              GFP_KERNEL);
2368                 if (!serial->rx_data[i]) {
2369                         dev_err(dev, "%s - Out of memory\n", __func__);
2370                         goto exit;
2371                 }
2372         }
2373
2374         /* TX, allocate urb and initialize */
2375         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2376         if (!serial->tx_urb) {
2377                 dev_err(dev, "Could not allocate urb?\n");
2378                 goto exit;
2379         }
2380         serial->tx_urb->transfer_buffer = NULL;
2381         serial->tx_urb->transfer_buffer_length = 0;
2382         /* prepare our TX buffer */
2383         serial->tx_data_count = 0;
2384         serial->tx_buffer_count = 0;
2385         serial->tx_data_length = tx_size;
2386         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2387         if (!serial->tx_data) {
2388                 dev_err(dev, "%s - Out of memory\n", __func__);
2389                 goto exit;
2390         }
2391         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2392         if (!serial->tx_buffer) {
2393                 dev_err(dev, "%s - Out of memory\n", __func__);
2394                 goto exit;
2395         }
2396
2397         return 0;
2398 exit:
2399         hso_serial_common_free(serial);
2400         return -1;
2401 }
2402
2403 /* Creates a general hso device */
2404 static struct hso_device *hso_create_device(struct usb_interface *intf,
2405                                             int port_spec)
2406 {
2407         struct hso_device *hso_dev;
2408
2409         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2410         if (!hso_dev)
2411                 return NULL;
2412
2413         hso_dev->port_spec = port_spec;
2414         hso_dev->usb = interface_to_usbdev(intf);
2415         hso_dev->interface = intf;
2416         kref_init(&hso_dev->ref);
2417         mutex_init(&hso_dev->mutex);
2418
2419         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2420         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2421         INIT_WORK(&hso_dev->reset_device, reset_device);
2422
2423         return hso_dev;
2424 }
2425
2426 /* Removes a network device in the network device table */
2427 static int remove_net_device(struct hso_device *hso_dev)
2428 {
2429         int i;
2430
2431         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2432                 if (network_table[i] == hso_dev) {
2433                         network_table[i] = NULL;
2434                         break;
2435                 }
2436         }
2437         if (i == HSO_MAX_NET_DEVICES)
2438                 return -1;
2439         return 0;
2440 }
2441
2442 /* Frees our network device */
2443 static void hso_free_net_device(struct hso_device *hso_dev)
2444 {
2445         int i;
2446         struct hso_net *hso_net = dev2net(hso_dev);
2447
2448         if (!hso_net)
2449                 return;
2450
2451         remove_net_device(hso_net->parent);
2452
2453         if (hso_net->net) {
2454                 unregister_netdev(hso_net->net);
2455                 free_netdev(hso_net->net);
2456         }
2457
2458         /* start freeing */
2459         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2460                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2461                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2462                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2463         }
2464         usb_free_urb(hso_net->mux_bulk_tx_urb);
2465         kfree(hso_net->mux_bulk_tx_buf);
2466         hso_net->mux_bulk_tx_buf = NULL;
2467
2468         kfree(hso_dev);
2469 }
2470
2471 static const struct net_device_ops hso_netdev_ops = {
2472         .ndo_open       = hso_net_open,
2473         .ndo_stop       = hso_net_close,
2474         .ndo_start_xmit = hso_net_start_xmit,
2475         .ndo_tx_timeout = hso_net_tx_timeout,
2476 };
2477
2478 /* initialize the network interface */
2479 static void hso_net_init(struct net_device *net)
2480 {
2481         struct hso_net *hso_net = netdev_priv(net);
2482
2483         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2484
2485         /* fill in the other fields */
2486         net->netdev_ops = &hso_netdev_ops;
2487         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2488         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2489         net->type = ARPHRD_NONE;
2490         net->mtu = DEFAULT_MTU - 14;
2491         net->tx_queue_len = 10;
2492         SET_ETHTOOL_OPS(net, &ops);
2493
2494         /* and initialize the semaphore */
2495         spin_lock_init(&hso_net->net_lock);
2496 }
2497
2498 /* Adds a network device in the network device table */
2499 static int add_net_device(struct hso_device *hso_dev)
2500 {
2501         int i;
2502
2503         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2504                 if (network_table[i] == NULL) {
2505                         network_table[i] = hso_dev;
2506                         break;
2507                 }
2508         }
2509         if (i == HSO_MAX_NET_DEVICES)
2510                 return -1;
2511         return 0;
2512 }
2513
2514 static int hso_rfkill_set_block(void *data, bool blocked)
2515 {
2516         struct hso_device *hso_dev = data;
2517         int enabled = !blocked;
2518         int rv;
2519
2520         mutex_lock(&hso_dev->mutex);
2521         if (hso_dev->usb_gone)
2522                 rv = 0;
2523         else
2524                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2525                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2526                                        USB_CTRL_SET_TIMEOUT);
2527         mutex_unlock(&hso_dev->mutex);
2528         return rv;
2529 }
2530
2531 static const struct rfkill_ops hso_rfkill_ops = {
2532         .set_block = hso_rfkill_set_block,
2533 };
2534
2535 /* Creates and sets up everything for rfkill */
2536 static void hso_create_rfkill(struct hso_device *hso_dev,
2537                              struct usb_interface *interface)
2538 {
2539         struct hso_net *hso_net = dev2net(hso_dev);
2540         struct device *dev = &hso_net->net->dev;
2541         char *rfkn;
2542
2543         rfkn = kzalloc(20, GFP_KERNEL);
2544         if (!rfkn)
2545                 dev_err(dev, "%s - Out of memory\n", __func__);
2546
2547         snprintf(rfkn, 20, "hso-%d",
2548                  interface->altsetting->desc.bInterfaceNumber);
2549
2550         hso_net->rfkill = rfkill_alloc(rfkn,
2551                                        &interface_to_usbdev(interface)->dev,
2552                                        RFKILL_TYPE_WWAN,
2553                                        &hso_rfkill_ops, hso_dev);
2554         if (!hso_net->rfkill) {
2555                 dev_err(dev, "%s - Out of memory\n", __func__);
2556                 kfree(rfkn);
2557                 return;
2558         }
2559         if (rfkill_register(hso_net->rfkill) < 0) {
2560                 rfkill_destroy(hso_net->rfkill);
2561                 kfree(rfkn);
2562                 hso_net->rfkill = NULL;
2563                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2564                 return;
2565         }
2566 }
2567
2568 static struct device_type hso_type = {
2569         .name   = "wwan",
2570 };
2571
2572 /* Creates our network device */
2573 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2574                                                 int port_spec)
2575 {
2576         int result, i;
2577         struct net_device *net;
2578         struct hso_net *hso_net;
2579         struct hso_device *hso_dev;
2580
2581         hso_dev = hso_create_device(interface, port_spec);
2582         if (!hso_dev)
2583                 return NULL;
2584
2585         /* allocate our network device, then we can put in our private data */
2586         /* call hso_net_init to do the basic initialization */
2587         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2588         if (!net) {
2589                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2590                 goto exit;
2591         }
2592
2593         hso_net = netdev_priv(net);
2594
2595         hso_dev->port_data.dev_net = hso_net;
2596         hso_net->net = net;
2597         hso_net->parent = hso_dev;
2598
2599         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2600                                       USB_DIR_IN);
2601         if (!hso_net->in_endp) {
2602                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2603                 goto exit;
2604         }
2605         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2606                                        USB_DIR_OUT);
2607         if (!hso_net->out_endp) {
2608                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2609                 goto exit;
2610         }
2611         SET_NETDEV_DEV(net, &interface->dev);
2612         SET_NETDEV_DEVTYPE(net, &hso_type);
2613
2614         /* registering our net device */
2615         result = register_netdev(net);
2616         if (result) {
2617                 dev_err(&interface->dev, "Failed to register device\n");
2618                 goto exit;
2619         }
2620
2621         /* start allocating */
2622         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2623                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2624                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2625                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2626                         goto exit;
2627                 }
2628                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2629                                                            GFP_KERNEL);
2630                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2631                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2632                         goto exit;
2633                 }
2634         }
2635         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2636         if (!hso_net->mux_bulk_tx_urb) {
2637                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2638                 goto exit;
2639         }
2640         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2641         if (!hso_net->mux_bulk_tx_buf) {
2642                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2643                 goto exit;
2644         }
2645
2646         add_net_device(hso_dev);
2647
2648         hso_log_port(hso_dev);
2649
2650         hso_create_rfkill(hso_dev, interface);
2651
2652         return hso_dev;
2653 exit:
2654         hso_free_net_device(hso_dev);
2655         return NULL;
2656 }
2657
2658 static void hso_free_tiomget(struct hso_serial *serial)
2659 {
2660         struct hso_tiocmget *tiocmget = serial->tiocmget;
2661         if (tiocmget) {
2662                 if (tiocmget->urb) {
2663                         usb_free_urb(tiocmget->urb);
2664                         tiocmget->urb = NULL;
2665                 }
2666                 serial->tiocmget = NULL;
2667                 kfree(tiocmget);
2668
2669         }
2670 }
2671
2672 /* Frees an AT channel ( goes for both mux and non-mux ) */
2673 static void hso_free_serial_device(struct hso_device *hso_dev)
2674 {
2675         struct hso_serial *serial = dev2ser(hso_dev);
2676
2677         if (!serial)
2678                 return;
2679         set_serial_by_index(serial->minor, NULL);
2680
2681         hso_serial_common_free(serial);
2682
2683         if (serial->shared_int) {
2684                 mutex_lock(&serial->shared_int->shared_int_lock);
2685                 if (--serial->shared_int->ref_count == 0)
2686                         hso_free_shared_int(serial->shared_int);
2687                 else
2688                         mutex_unlock(&serial->shared_int->shared_int_lock);
2689         }
2690         hso_free_tiomget(serial);
2691         kfree(serial);
2692         kfree(hso_dev);
2693 }
2694
2695 /* Creates a bulk AT channel */
2696 static struct hso_device *hso_create_bulk_serial_device(
2697                         struct usb_interface *interface, int port)
2698 {
2699         struct hso_device *hso_dev;
2700         struct hso_serial *serial;
2701         int num_urbs;
2702         struct hso_tiocmget *tiocmget;
2703
2704         hso_dev = hso_create_device(interface, port);
2705         if (!hso_dev)
2706                 return NULL;
2707
2708         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2709         if (!serial)
2710                 goto exit;
2711
2712         serial->parent = hso_dev;
2713         hso_dev->port_data.dev_serial = serial;
2714
2715         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2716                 num_urbs = 2;
2717                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2718                                            GFP_KERNEL);
2719                 /* it isn't going to break our heart if serial->tiocmget
2720                  *  allocation fails don't bother checking this.
2721                  */
2722                 if (serial->tiocmget) {
2723                         tiocmget = serial->tiocmget;
2724                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2725                         if (tiocmget->urb) {
2726                                 mutex_init(&tiocmget->mutex);
2727                                 init_waitqueue_head(&tiocmget->waitq);
2728                                 tiocmget->endp = hso_get_ep(
2729                                         interface,
2730                                         USB_ENDPOINT_XFER_INT,
2731                                         USB_DIR_IN);
2732                         } else
2733                                 hso_free_tiomget(serial);
2734                 }
2735         }
2736         else
2737                 num_urbs = 1;
2738
2739         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2740                                      BULK_URB_TX_SIZE))
2741                 goto exit;
2742
2743         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2744                                      USB_DIR_IN);
2745         if (!serial->in_endp) {
2746                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2747                 goto exit2;
2748         }
2749
2750         if (!
2751             (serial->out_endp =
2752              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2753                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2754                 goto exit2;
2755         }
2756
2757         serial->write_data = hso_std_serial_write_data;
2758
2759         /* and record this serial */
2760         set_serial_by_index(serial->minor, serial);
2761
2762         /* setup the proc dirs and files if needed */
2763         hso_log_port(hso_dev);
2764
2765         /* done, return it */
2766         return hso_dev;
2767
2768 exit2:
2769         hso_serial_common_free(serial);
2770 exit:
2771         hso_free_tiomget(serial);
2772         kfree(serial);
2773         kfree(hso_dev);
2774         return NULL;
2775 }
2776
2777 /* Creates a multiplexed AT channel */
2778 static
2779 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2780                                                 int port,
2781                                                 struct hso_shared_int *mux)
2782 {
2783         struct hso_device *hso_dev;
2784         struct hso_serial *serial;
2785         int port_spec;
2786
2787         port_spec = HSO_INTF_MUX;
2788         port_spec &= ~HSO_PORT_MASK;
2789
2790         port_spec |= hso_mux_to_port(port);
2791         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2792                 return NULL;
2793
2794         hso_dev = hso_create_device(interface, port_spec);
2795         if (!hso_dev)
2796                 return NULL;
2797
2798         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2799         if (!serial)
2800                 goto exit;
2801
2802         hso_dev->port_data.dev_serial = serial;
2803         serial->parent = hso_dev;
2804
2805         if (hso_serial_common_create
2806             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2807                 goto exit;
2808
2809         serial->tx_data_length--;
2810         serial->write_data = hso_mux_serial_write_data;
2811
2812         serial->shared_int = mux;
2813         mutex_lock(&serial->shared_int->shared_int_lock);
2814         serial->shared_int->ref_count++;
2815         mutex_unlock(&serial->shared_int->shared_int_lock);
2816
2817         /* and record this serial */
2818         set_serial_by_index(serial->minor, serial);
2819
2820         /* setup the proc dirs and files if needed */
2821         hso_log_port(hso_dev);
2822
2823         /* done, return it */
2824         return hso_dev;
2825
2826 exit:
2827         if (serial) {
2828                 tty_unregister_device(tty_drv, serial->minor);
2829                 kfree(serial);
2830         }
2831         if (hso_dev)
2832                 kfree(hso_dev);
2833         return NULL;
2834
2835 }
2836
2837 static void hso_free_shared_int(struct hso_shared_int *mux)
2838 {
2839         usb_free_urb(mux->shared_intr_urb);
2840         kfree(mux->shared_intr_buf);
2841         mutex_unlock(&mux->shared_int_lock);
2842         kfree(mux);
2843 }
2844
2845 static
2846 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2847 {
2848         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2849
2850         if (!mux)
2851                 return NULL;
2852
2853         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2854                                     USB_DIR_IN);
2855         if (!mux->intr_endp) {
2856                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2857                 goto exit;
2858         }
2859
2860         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2861         if (!mux->shared_intr_urb) {
2862                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2863                 goto exit;
2864         }
2865         mux->shared_intr_buf =
2866                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2867                         GFP_KERNEL);
2868         if (!mux->shared_intr_buf) {
2869                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2870                 goto exit;
2871         }
2872
2873         mutex_init(&mux->shared_int_lock);
2874
2875         return mux;
2876
2877 exit:
2878         kfree(mux->shared_intr_buf);
2879         usb_free_urb(mux->shared_intr_urb);
2880         kfree(mux);
2881         return NULL;
2882 }
2883
2884 /* Gets the port spec for a certain interface */
2885 static int hso_get_config_data(struct usb_interface *interface)
2886 {
2887         struct usb_device *usbdev = interface_to_usbdev(interface);
2888         u8 config_data[17];
2889         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2890         s32 result;
2891
2892         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2893                             0x86, 0xC0, 0, 0, config_data, 17,
2894                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2895                 return -EIO;
2896         }
2897
2898         switch (config_data[if_num]) {
2899         case 0x0:
2900                 result = 0;
2901                 break;
2902         case 0x1:
2903                 result = HSO_PORT_DIAG;
2904                 break;
2905         case 0x2:
2906                 result = HSO_PORT_GPS;
2907                 break;
2908         case 0x3:
2909                 result = HSO_PORT_GPS_CONTROL;
2910                 break;
2911         case 0x4:
2912                 result = HSO_PORT_APP;
2913                 break;
2914         case 0x5:
2915                 result = HSO_PORT_APP2;
2916                 break;
2917         case 0x6:
2918                 result = HSO_PORT_CONTROL;
2919                 break;
2920         case 0x7:
2921                 result = HSO_PORT_NETWORK;
2922                 break;
2923         case 0x8:
2924                 result = HSO_PORT_MODEM;
2925                 break;
2926         case 0x9:
2927                 result = HSO_PORT_MSD;
2928                 break;
2929         case 0xa:
2930                 result = HSO_PORT_PCSC;
2931                 break;
2932         case 0xb:
2933                 result = HSO_PORT_VOICE;
2934                 break;
2935         default:
2936                 result = 0;
2937         }
2938
2939         if (result)
2940                 result |= HSO_INTF_BULK;
2941
2942         if (config_data[16] & 0x1)
2943                 result |= HSO_INFO_CRC_BUG;
2944
2945         return result;
2946 }
2947
2948 /* called once for each interface upon device insertion */
2949 static int hso_probe(struct usb_interface *interface,
2950                      const struct usb_device_id *id)
2951 {
2952         int mux, i, if_num, port_spec;
2953         unsigned char port_mask;
2954         struct hso_device *hso_dev = NULL;
2955         struct hso_shared_int *shared_int;
2956         struct hso_device *tmp_dev = NULL;
2957
2958         if_num = interface->altsetting->desc.bInterfaceNumber;
2959
2960         /* Get the interface/port specification from either driver_info or from
2961          * the device itself */
2962         if (id->driver_info)
2963                 port_spec = ((u32 *)(id->driver_info))[if_num];
2964         else
2965                 port_spec = hso_get_config_data(interface);
2966
2967         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2968                 dev_err(&interface->dev, "Not our interface\n");
2969                 return -ENODEV;
2970         }
2971         /* Check if we need to switch to alt interfaces prior to port
2972          * configuration */
2973         if (interface->num_altsetting > 1)
2974                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2975         interface->needs_remote_wakeup = 1;
2976
2977         /* Allocate new hso device(s) */
2978         switch (port_spec & HSO_INTF_MASK) {
2979         case HSO_INTF_MUX:
2980                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2981                         /* Create the network device */
2982                         if (!disable_net) {
2983                                 hso_dev = hso_create_net_device(interface,
2984                                                                 port_spec);
2985                                 if (!hso_dev)
2986                                         goto exit;
2987                                 tmp_dev = hso_dev;
2988                         }
2989                 }
2990
2991                 if (hso_get_mux_ports(interface, &port_mask))
2992                         /* TODO: de-allocate everything */
2993                         goto exit;
2994
2995                 shared_int = hso_create_shared_int(interface);
2996                 if (!shared_int)
2997                         goto exit;
2998
2999                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
3000                         if (port_mask & i) {
3001                                 hso_dev = hso_create_mux_serial_device(
3002                                                 interface, i, shared_int);
3003                                 if (!hso_dev)
3004                                         goto exit;
3005                         }
3006                 }
3007
3008                 if (tmp_dev)
3009                         hso_dev = tmp_dev;
3010                 break;
3011
3012         case HSO_INTF_BULK:
3013                 /* It's a regular bulk interface */
3014                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3015                     !disable_net)
3016                         hso_dev = hso_create_net_device(interface, port_spec);
3017                 else
3018                         hso_dev =
3019                             hso_create_bulk_serial_device(interface, port_spec);
3020                 if (!hso_dev)
3021                         goto exit;
3022                 break;
3023         default:
3024                 goto exit;
3025         }
3026
3027         /* save our data pointer in this device */
3028         usb_set_intfdata(interface, hso_dev);
3029
3030         /* done */
3031         return 0;
3032 exit:
3033         hso_free_interface(interface);
3034         return -ENODEV;
3035 }
3036
3037 /* device removed, cleaning up */
3038 static void hso_disconnect(struct usb_interface *interface)
3039 {
3040         hso_free_interface(interface);
3041
3042         /* remove reference of our private data */
3043         usb_set_intfdata(interface, NULL);
3044 }
3045
3046 static void async_get_intf(struct work_struct *data)
3047 {
3048         struct hso_device *hso_dev =
3049             container_of(data, struct hso_device, async_get_intf);
3050         usb_autopm_get_interface(hso_dev->interface);
3051 }
3052
3053 static void async_put_intf(struct work_struct *data)
3054 {
3055         struct hso_device *hso_dev =
3056             container_of(data, struct hso_device, async_put_intf);
3057         usb_autopm_put_interface(hso_dev->interface);
3058 }
3059
3060 static int hso_get_activity(struct hso_device *hso_dev)
3061 {
3062         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3063                 if (!hso_dev->is_active) {
3064                         hso_dev->is_active = 1;
3065                         schedule_work(&hso_dev->async_get_intf);
3066                 }
3067         }
3068
3069         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3070                 return -EAGAIN;
3071
3072         usb_mark_last_busy(hso_dev->usb);
3073
3074         return 0;
3075 }
3076
3077 static int hso_put_activity(struct hso_device *hso_dev)
3078 {
3079         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3080                 if (hso_dev->is_active) {
3081                         hso_dev->is_active = 0;
3082                         schedule_work(&hso_dev->async_put_intf);
3083                         return -EAGAIN;
3084                 }
3085         }
3086         hso_dev->is_active = 0;
3087         return 0;
3088 }
3089
3090 /* called by kernel when we need to suspend device */
3091 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3092 {
3093         int i, result;
3094
3095         /* Stop all serial ports */
3096         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3097                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3098                         result = hso_stop_serial_device(serial_table[i]);
3099                         if (result)
3100                                 goto out;
3101                 }
3102         }
3103
3104         /* Stop all network ports */
3105         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3106                 if (network_table[i] &&
3107                     (network_table[i]->interface == iface)) {
3108                         result = hso_stop_net_device(network_table[i]);
3109                         if (result)
3110                                 goto out;
3111                 }
3112         }
3113
3114 out:
3115         return 0;
3116 }
3117
3118 /* called by kernel when we need to resume device */
3119 static int hso_resume(struct usb_interface *iface)
3120 {
3121         int i, result = 0;
3122         struct hso_net *hso_net;
3123
3124         /* Start all serial ports */
3125         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3126                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3127                         if (dev2ser(serial_table[i])->open_count) {
3128                                 result =
3129                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3130                                 hso_kick_transmit(dev2ser(serial_table[i]));
3131                                 if (result)
3132                                         goto out;
3133                         }
3134                 }
3135         }
3136
3137         /* Start all network ports */
3138         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3139                 if (network_table[i] &&
3140                     (network_table[i]->interface == iface)) {
3141                         hso_net = dev2net(network_table[i]);
3142                         if (hso_net->flags & IFF_UP) {
3143                                 /* First transmit any lingering data,
3144                                    then restart the device. */
3145                                 if (hso_net->skb_tx_buf) {
3146                                         dev_dbg(&iface->dev,
3147                                                 "Transmitting"
3148                                                 " lingering data\n");
3149                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3150                                                            hso_net->net);
3151                                         hso_net->skb_tx_buf = NULL;
3152                                 }
3153                                 result = hso_start_net_device(network_table[i]);
3154                                 if (result)
3155                                         goto out;
3156                         }
3157                 }
3158         }
3159
3160 out:
3161         return result;
3162 }
3163
3164 static void reset_device(struct work_struct *data)
3165 {
3166         struct hso_device *hso_dev =
3167             container_of(data, struct hso_device, reset_device);
3168         struct usb_device *usb = hso_dev->usb;
3169         int result;
3170
3171         if (hso_dev->usb_gone) {
3172                 D1("No reset during disconnect\n");
3173         } else {
3174                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3175                 if (result < 0)
3176                         D1("unable to lock device for reset: %d\n", result);
3177                 else {
3178                         usb_reset_device(usb);
3179                         usb_unlock_device(usb);
3180                 }
3181         }
3182 }
3183
3184 static void hso_serial_ref_free(struct kref *ref)
3185 {
3186         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3187
3188         hso_free_serial_device(hso_dev);
3189 }
3190
3191 static void hso_free_interface(struct usb_interface *interface)
3192 {
3193         struct hso_serial *hso_dev;
3194         struct tty_struct *tty;
3195         int i;
3196
3197         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3198                 if (serial_table[i] &&
3199                     (serial_table[i]->interface == interface)) {
3200                         hso_dev = dev2ser(serial_table[i]);
3201                         spin_lock_irq(&hso_dev->serial_lock);
3202                         tty = tty_kref_get(hso_dev->tty);
3203                         spin_unlock_irq(&hso_dev->serial_lock);
3204                         if (tty)
3205                                 tty_hangup(tty);
3206                         mutex_lock(&hso_dev->parent->mutex);
3207                         tty_kref_put(tty);
3208                         hso_dev->parent->usb_gone = 1;
3209                         mutex_unlock(&hso_dev->parent->mutex);
3210                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3211                 }
3212         }
3213
3214         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3215                 if (network_table[i] &&
3216                     (network_table[i]->interface == interface)) {
3217                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3218                         /* hso_stop_net_device doesn't stop the net queue since
3219                          * traffic needs to start it again when suspended */
3220                         netif_stop_queue(dev2net(network_table[i])->net);
3221                         hso_stop_net_device(network_table[i]);
3222                         cancel_work_sync(&network_table[i]->async_put_intf);
3223                         cancel_work_sync(&network_table[i]->async_get_intf);
3224                         if (rfk) {
3225                                 rfkill_unregister(rfk);
3226                                 rfkill_destroy(rfk);
3227                         }
3228                         hso_free_net_device(network_table[i]);
3229                 }
3230         }
3231 }
3232
3233 /* Helper functions */
3234
3235 /* Get the endpoint ! */
3236 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3237                                                   int type, int dir)
3238 {
3239         int i;
3240         struct usb_host_interface *iface = intf->cur_altsetting;
3241         struct usb_endpoint_descriptor *endp;
3242
3243         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3244                 endp = &iface->endpoint[i].desc;
3245                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3246                     (usb_endpoint_type(endp) == type))
3247                         return endp;
3248         }
3249
3250         return NULL;
3251 }
3252
3253 /* Get the byte that describes which ports are enabled */
3254 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3255 {
3256         int i;
3257         struct usb_host_interface *iface = intf->cur_altsetting;
3258
3259         if (iface->extralen == 3) {
3260                 *ports = iface->extra[2];
3261                 return 0;
3262         }
3263
3264         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3265                 if (iface->endpoint[i].extralen == 3) {
3266                         *ports = iface->endpoint[i].extra[2];
3267                         return 0;
3268                 }
3269         }
3270
3271         return -1;
3272 }
3273
3274 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3275 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3276                                    struct usb_device *usb, gfp_t gfp)
3277 {
3278         int result;
3279
3280         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3281                          usb_rcvintpipe(usb,
3282                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3283                          shared_int->shared_intr_buf,
3284                          1,
3285                          intr_callback, shared_int,
3286                          shared_int->intr_endp->bInterval);
3287
3288         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3289         if (result)
3290                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3291                         result);
3292
3293         return result;
3294 }
3295
3296 /* operations setup of the serial interface */
3297 static const struct tty_operations hso_serial_ops = {
3298         .open = hso_serial_open,
3299         .close = hso_serial_close,
3300         .write = hso_serial_write,
3301         .write_room = hso_serial_write_room,
3302         .ioctl = hso_serial_ioctl,
3303         .set_termios = hso_serial_set_termios,
3304         .chars_in_buffer = hso_serial_chars_in_buffer,
3305         .tiocmget = hso_serial_tiocmget,
3306         .tiocmset = hso_serial_tiocmset,
3307         .unthrottle = hso_unthrottle
3308 };
3309
3310 static struct usb_driver hso_driver = {
3311         .name = driver_name,
3312         .probe = hso_probe,
3313         .disconnect = hso_disconnect,
3314         .id_table = hso_ids,
3315         .suspend = hso_suspend,
3316         .resume = hso_resume,
3317         .reset_resume = hso_resume,
3318         .supports_autosuspend = 1,
3319 };
3320
3321 static int __init hso_init(void)
3322 {
3323         int i;
3324         int result;
3325
3326         /* put it in the log */
3327         printk(KERN_INFO "hso: %s\n", version);
3328
3329         /* Initialise the serial table semaphore and table */
3330         spin_lock_init(&serial_table_lock);
3331         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3332                 serial_table[i] = NULL;
3333
3334         /* allocate our driver using the proper amount of supported minors */
3335         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3336         if (!tty_drv)
3337                 return -ENOMEM;
3338
3339         /* fill in all needed values */
3340         tty_drv->magic = TTY_DRIVER_MAGIC;
3341         tty_drv->owner = THIS_MODULE;
3342         tty_drv->driver_name = driver_name;
3343         tty_drv->name = tty_filename;
3344
3345         /* if major number is provided as parameter, use that one */
3346         if (tty_major)
3347                 tty_drv->major = tty_major;
3348
3349         tty_drv->minor_start = 0;
3350         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3351         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3352         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3353         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3354         tty_drv->init_termios = tty_std_termios;
3355         hso_init_termios(&tty_drv->init_termios);
3356         tty_set_operations(tty_drv, &hso_serial_ops);
3357
3358         /* register the tty driver */
3359         result = tty_register_driver(tty_drv);
3360         if (result) {
3361                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3362                         __func__, result);
3363                 return result;
3364         }
3365
3366         /* register this module as an usb driver */
3367         result = usb_register(&hso_driver);
3368         if (result) {
3369                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3370                         result);
3371                 /* cleanup serial interface */
3372                 tty_unregister_driver(tty_drv);
3373                 return result;
3374         }
3375
3376         /* done */
3377         return 0;
3378 }
3379
3380 static void __exit hso_exit(void)
3381 {
3382         printk(KERN_INFO "hso: unloaded\n");
3383
3384         tty_unregister_driver(tty_drv);
3385         /* deregister the usb driver */
3386         usb_deregister(&hso_driver);
3387 }
3388
3389 /* Module definitions */
3390 module_init(hso_init);
3391 module_exit(hso_exit);
3392
3393 MODULE_AUTHOR(MOD_AUTHOR);
3394 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3395 MODULE_LICENSE(MOD_LICENSE);
3396 MODULE_INFO(Version, DRIVER_VERSION);
3397
3398 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3399 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3400 module_param(debug, int, S_IRUGO | S_IWUSR);
3401
3402 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3403 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3404 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3405
3406 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3407 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3408 module_param(disable_net, int, S_IRUGO | S_IWUSR);