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         }
 838         dev_kfree_skb(skb);
 839         /* we're done */
 840         return NETDEV_TX_OK;
 841 }
 842
 843 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 844 {
 845         struct hso_net *odev = netdev_priv(net);
 846
 847         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 848         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 849         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 850 }
 851
 852 static const struct ethtool_ops ops = {
 853         .get_drvinfo = hso_get_drvinfo,
 854         .get_link = ethtool_op_get_link
 855 };
 856
 857 /* called when a packet did not ack after watchdogtimeout */
 858 static void hso_net_tx_timeout(struct net_device *net)
 859 {
 860         struct hso_net *odev = netdev_priv(net);
 861
 862         if (!odev)
 863                 return;
 864
 865         /* Tell syslog we are hosed. */
 866         dev_warn(&net->dev, "Tx timed out.\n");
 867
 868         /* Tear the waiting frame off the list */
 869         if (odev->mux_bulk_tx_urb &&
 870             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 871                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 872
 873         /* Update statistics */
 874         net->stats.tx_errors++;
 875 }
 876
 877 /* make a real packet from the received USB buffer */
 878 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 879                         unsigned int count, unsigned char is_eop)
 880 {
 881         unsigned short temp_bytes;
 882         unsigned short buffer_offset = 0;
 883         unsigned short frame_len;
 884         unsigned char *tmp_rx_buf;
 885
 886         /* log if needed */
 887         D1("Rx %d bytes", count);
 888         DUMP(ip_pkt, min(128, (int)count));
 889
 890         while (count) {
 891                 switch (odev->rx_parse_state) {
 892                 case WAIT_IP:
 893                         /* waiting for IP header. */
 894                         /* wanted bytes - size of ip header */
 895                         temp_bytes =
 896                             (count <
 897                              odev->rx_buf_missing) ? count : odev->
 898                             rx_buf_missing;
 899
 900                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 901                                odev->rx_buf_size, ip_pkt + buffer_offset,
 902                                temp_bytes);
 903
 904                         odev->rx_buf_size += temp_bytes;
 905                         buffer_offset += temp_bytes;
 906                         odev->rx_buf_missing -= temp_bytes;
 907                         count -= temp_bytes;
 908
 909                         if (!odev->rx_buf_missing) {
 910                                 /* header is complete allocate an sk_buffer and
 911                                  * continue to WAIT_DATA */
 912                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 913
 914                                 if ((frame_len > DEFAULT_MRU) ||
 915                                     (frame_len < sizeof(struct iphdr))) {
 916                                         dev_err(&odev->net->dev,
 917                                                 "Invalid frame (%d) length\n",
 918                                                 frame_len);
 919                                         odev->rx_parse_state = WAIT_SYNC;
 920                                         continue;
 921                                 }
 922                                 /* Allocate an sk_buff */
 923                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 924                                                                     frame_len);
 925                                 if (!odev->skb_rx_buf) {
 926                                         /* We got no receive buffer. */
 927                                         D1("could not allocate memory");
 928                                         odev->rx_parse_state = WAIT_SYNC;
 929                                         return;
 930                                 }
 931
 932                                 /* Copy what we got so far. make room for iphdr
 933                                  * after tail. */
 934                                 tmp_rx_buf =
 935                                     skb_put(odev->skb_rx_buf,
 936                                             sizeof(struct iphdr));
 937                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 938                                        sizeof(struct iphdr));
 939
 940                                 /* ETH_HLEN */
 941                                 odev->rx_buf_size = sizeof(struct iphdr);
 942
 943                                 /* Filip actually use .tot_len */
 944                                 odev->rx_buf_missing =
 945                                     frame_len - sizeof(struct iphdr);
 946                                 odev->rx_parse_state = WAIT_DATA;
 947                         }
 948                         break;
 949
 950                 case WAIT_DATA:
 951                         temp_bytes = (count < odev->rx_buf_missing)
 952                                         ? count : odev->rx_buf_missing;
 953
 954                         /* Copy the rest of the bytes that are left in the
 955                          * buffer into the waiting sk_buf. */
 956                         /* Make room for temp_bytes after tail. */
 957                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 958                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 959
 960                         odev->rx_buf_missing -= temp_bytes;
 961                         count -= temp_bytes;
 962                         buffer_offset += temp_bytes;
 963                         odev->rx_buf_size += temp_bytes;
 964                         if (!odev->rx_buf_missing) {
 965                                 /* Packet is complete. Inject into stack. */
 966                                 /* We have IP packet here */
 967                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 968                                 /* don't check it */
 969                                 odev->skb_rx_buf->ip_summed =
 970                                         CHECKSUM_UNNECESSARY;
 971
 972                                 skb_reset_mac_header(odev->skb_rx_buf);
 973
 974                                 /* Ship it off to the kernel */
 975                                 netif_rx(odev->skb_rx_buf);
 976                                 /* No longer our buffer. */
 977                                 odev->skb_rx_buf = NULL;
 978
 979                                 /* update out statistics */
 980                                 odev->net->stats.rx_packets++;
 981
 982                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 983
 984                                 odev->rx_buf_size = 0;
 985                                 odev->rx_buf_missing = sizeof(struct iphdr);
 986                                 odev->rx_parse_state = WAIT_IP;
 987                         }
 988                         break;
 989
 990                 case WAIT_SYNC:
 991                         D1(" W_S");
 992                         count = 0;
 993                         break;
 994                 default:
 995                         D1(" ");
 996                         count--;
 997                         break;
 998                 }
 999         }
1000
1001         /* Recovery mechanism for WAIT_SYNC state. */
1002         if (is_eop) {
1003                 if (odev->rx_parse_state == WAIT_SYNC) {
1004                         odev->rx_parse_state = WAIT_IP;
1005                         odev->rx_buf_size = 0;
1006                         odev->rx_buf_missing = sizeof(struct iphdr);
1007                 }
1008         }
1009 }
1010
1011 /* Moving data from usb to kernel (in interrupt state) */
1012 static void read_bulk_callback(struct urb *urb)
1013 {
1014         struct hso_net *odev = urb->context;
1015         struct net_device *net;
1016         int result;
1017         int status = urb->status;
1018
1019         /* is al ok?  (Filip: Who's Al ?) */
1020         if (status) {
1021                 handle_usb_error(status, __func__, odev->parent);
1022                 return;
1023         }
1024
1025         /* Sanity check */
1026         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1027                 D1("BULK IN callback but driver is not active!");
1028                 return;
1029         }
1030         usb_mark_last_busy(urb->dev);
1031
1032         net = odev->net;
1033
1034         if (!netif_device_present(net)) {
1035                 /* Somebody killed our network interface... */
1036                 return;
1037         }
1038
1039         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
1040                 u32 rest;
1041                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1042                 rest = urb->actual_length %
1043                         le16_to_cpu(odev->in_endp->wMaxPacketSize);
1044                 if (((rest == 5) || (rest == 6)) &&
1045                     !memcmp(((u8 *) urb->transfer_buffer) +
1046                             urb->actual_length - 4, crc_check, 4)) {
1047                         urb->actual_length -= 4;
1048                 }
1049         }
1050
1051         /* do we even have a packet? */
1052         if (urb->actual_length) {
1053                 /* Handle the IP stream, add header and push it onto network
1054                  * stack if the packet is complete. */
1055                 spin_lock(&odev->net_lock);
1056                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1057                             (urb->transfer_buffer_length >
1058                              urb->actual_length) ? 1 : 0);
1059                 spin_unlock(&odev->net_lock);
1060         }
1061
1062         /* We are done with this URB, resubmit it. Prep the USB to wait for
1063          * another frame. Reuse same as received. */
1064         usb_fill_bulk_urb(urb,
1065                           odev->parent->usb,
1066                           usb_rcvbulkpipe(odev->parent->usb,
1067                                           odev->in_endp->
1068                                           bEndpointAddress & 0x7F),
1069                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1070                           read_bulk_callback, odev);
1071
1072         /* Give this to the USB subsystem so it can tell us when more data
1073          * arrives. */
1074         result = usb_submit_urb(urb, GFP_ATOMIC);
1075         if (result)
1076                 dev_warn(&odev->parent->interface->dev,
1077                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1078                          result);
1079 }
1080
1081 /* Serial driver functions */
1082
1083 static void hso_init_termios(struct ktermios *termios)
1084 {
1085         /*
1086          * The default requirements for this device are:
1087          */
1088         termios->c_iflag &=
1089                 ~(IGNBRK        /* disable ignore break */
1090                 | BRKINT        /* disable break causes interrupt */
1091                 | PARMRK        /* disable mark parity errors */
1092                 | ISTRIP        /* disable clear high bit of input characters */
1093                 | INLCR         /* disable translate NL to CR */
1094                 | IGNCR         /* disable ignore CR */
1095                 | ICRNL         /* disable translate CR to NL */
1096                 | IXON);        /* disable enable XON/XOFF flow control */
1097
1098         /* disable postprocess output characters */
1099         termios->c_oflag &= ~OPOST;
1100
1101         termios->c_lflag &=
1102                 ~(ECHO          /* disable echo input characters */
1103                 | ECHONL        /* disable echo new line */
1104                 | ICANON        /* disable erase, kill, werase, and rprnt
1105                                    special characters */
1106                 | ISIG          /* disable interrupt, quit, and suspend special
1107                                    characters */
1108                 | IEXTEN);      /* disable non-POSIX special characters */
1109
1110         termios->c_cflag &=
1111                 ~(CSIZE         /* no size */
1112                 | PARENB        /* disable parity bit */
1113                 | CBAUD         /* clear current baud rate */
1114                 | CBAUDEX);     /* clear current buad rate */
1115
1116         termios->c_cflag |= CS8;        /* character size 8 bits */
1117
1118         /* baud rate 115200 */
1119         tty_termios_encode_baud_rate(termios, 115200, 115200);
1120 }
1121
1122 static void _hso_serial_set_termios(struct tty_struct *tty,
1123                                     struct ktermios *old)
1124 {
1125         struct hso_serial *serial = get_serial_by_tty(tty);
1126         struct ktermios *termios;
1127
1128         if (!serial) {
1129                 printk(KERN_ERR "%s: no tty structures", __func__);
1130                 return;
1131         }
1132
1133         D4("port %d", serial->minor);
1134
1135         /*
1136          *      Fix up unsupported bits
1137          */
1138         termios = tty->termios;
1139         termios->c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1140
1141         termios->c_cflag &=
1142                 ~(CSIZE         /* no size */
1143                 | PARENB        /* disable parity bit */
1144                 | CBAUD         /* clear current baud rate */
1145                 | CBAUDEX);     /* clear current buad rate */
1146
1147         termios->c_cflag |= CS8;        /* character size 8 bits */
1148
1149         /* baud rate 115200 */
1150         tty_encode_baud_rate(tty, 115200, 115200);
1151 }
1152
1153 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1154 {
1155         int result;
1156         /* We are done with this URB, resubmit it. Prep the USB to wait for
1157          * another frame */
1158         usb_fill_bulk_urb(urb, serial->parent->usb,
1159                           usb_rcvbulkpipe(serial->parent->usb,
1160                                           serial->in_endp->
1161                                           bEndpointAddress & 0x7F),
1162                           urb->transfer_buffer, serial->rx_data_length,
1163                           hso_std_serial_read_bulk_callback, serial);
1164         /* Give this to the USB subsystem so it can tell us when more data
1165          * arrives. */
1166         result = usb_submit_urb(urb, GFP_ATOMIC);
1167         if (result) {
1168                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1169                         __func__, result);
1170         }
1171 }
1172
1173
1174
1175
1176 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1177 {
1178         int count;
1179         struct urb *curr_urb;
1180
1181         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1182                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1183                 count = put_rxbuf_data(curr_urb, serial);
1184                 if (count == -1)
1185                         return;
1186                 if (count == 0) {
1187                         serial->curr_rx_urb_idx++;
1188                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1189                                 serial->curr_rx_urb_idx = 0;
1190                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1191                 }
1192         }
1193 }
1194
1195 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1196 {
1197         int count = 0;
1198         struct urb *urb;
1199
1200         urb = serial->rx_urb[0];
1201         if (serial->open_count > 0) {
1202                 count = put_rxbuf_data(urb, serial);
1203                 if (count == -1)
1204                         return;
1205         }
1206         /* Re issue a read as long as we receive data. */
1207
1208         if (count == 0 && ((urb->actual_length != 0) ||
1209                            (serial->rx_state == RX_PENDING))) {
1210                 serial->rx_state = RX_SENT;
1211                 hso_mux_serial_read(serial);
1212         } else
1213                 serial->rx_state = RX_IDLE;
1214 }
1215
1216
1217 /* read callback for Diag and CS port */
1218 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1219 {
1220         struct hso_serial *serial = urb->context;
1221         int status = urb->status;
1222
1223         /* sanity check */
1224         if (!serial) {
1225                 D1("serial == NULL");
1226                 return;
1227         } else if (status) {
1228                 handle_usb_error(status, __func__, serial->parent);
1229                 return;
1230         }
1231
1232         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1233         D1("Actual length = %d\n", urb->actual_length);
1234         DUMP1(urb->transfer_buffer, urb->actual_length);
1235
1236         /* Anyone listening? */
1237         if (serial->open_count == 0)
1238                 return;
1239
1240         if (status == 0) {
1241                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1242                         u32 rest;
1243                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1244                         rest =
1245                             urb->actual_length %
1246                             le16_to_cpu(serial->in_endp->wMaxPacketSize);
1247                         if (((rest == 5) || (rest == 6)) &&
1248                             !memcmp(((u8 *) urb->transfer_buffer) +
1249                                     urb->actual_length - 4, crc_check, 4)) {
1250                                 urb->actual_length -= 4;
1251                         }
1252                 }
1253                 /* Valid data, handle RX data */
1254                 spin_lock(&serial->serial_lock);
1255                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1256                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1257                 spin_unlock(&serial->serial_lock);
1258         } else if (status == -ENOENT || status == -ECONNRESET) {
1259                 /* Unlinked - check for throttled port. */
1260                 D2("Port %d, successfully unlinked urb", serial->minor);
1261                 spin_lock(&serial->serial_lock);
1262                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1263                 hso_resubmit_rx_bulk_urb(serial, urb);
1264                 spin_unlock(&serial->serial_lock);
1265         } else {
1266                 D2("Port %d, status = %d for read urb", serial->minor, status);
1267                 return;
1268         }
1269 }
1270
1271 /*
1272  * This needs to be a tasklet otherwise we will
1273  * end up recursively calling this function.
1274  */
1275 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1276 {
1277         unsigned long flags;
1278
1279         spin_lock_irqsave(&serial->serial_lock, flags);
1280         if ((serial->parent->port_spec & HSO_INTF_MUX))
1281                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1282         else
1283                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1284         spin_unlock_irqrestore(&serial->serial_lock, flags);
1285 }
1286
1287 static  void hso_unthrottle(struct tty_struct *tty)
1288 {
1289         struct hso_serial *serial = get_serial_by_tty(tty);
1290
1291         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1292 }
1293
1294 static void hso_unthrottle_workfunc(struct work_struct *work)
1295 {
1296         struct hso_serial *serial =
1297             container_of(work, struct hso_serial,
1298                          retry_unthrottle_workqueue);
1299         hso_unthrottle_tasklet(serial);
1300 }
1301
1302 /* open the requested serial port */
1303 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1304 {
1305         struct hso_serial *serial = get_serial_by_index(tty->index);
1306         int result;
1307
1308         /* sanity check */
1309         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1310                 WARN_ON(1);
1311                 tty->driver_data = NULL;
1312                 D1("Failed to open port");
1313                 return -ENODEV;
1314         }
1315
1316         mutex_lock(&serial->parent->mutex);
1317         result = usb_autopm_get_interface(serial->parent->interface);
1318         if (result < 0)
1319                 goto err_out;
1320
1321         D1("Opening %d", serial->minor);
1322         kref_get(&serial->parent->ref);
1323
1324         /* setup */
1325         spin_lock_irq(&serial->serial_lock);
1326         tty->driver_data = serial;
1327         tty_kref_put(serial->tty);
1328         serial->tty = tty_kref_get(tty);
1329         spin_unlock_irq(&serial->serial_lock);
1330
1331         /* check for port already opened, if not set the termios */
1332         serial->open_count++;
1333         if (serial->open_count == 1) {
1334                 tty->low_latency = 1;
1335                 serial->rx_state = RX_IDLE;
1336                 /* Force default termio settings */
1337                 _hso_serial_set_termios(tty, NULL);
1338                 tasklet_init(&serial->unthrottle_tasklet,
1339                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1340                              (unsigned long)serial);
1341                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1342                           hso_unthrottle_workfunc);
1343                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1344                 if (result) {
1345                         hso_stop_serial_device(serial->parent);
1346                         serial->open_count--;
1347                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1348                 }
1349         } else {
1350                 D1("Port was already open");
1351         }
1352
1353         usb_autopm_put_interface(serial->parent->interface);
1354
1355         /* done */
1356         if (result)
1357                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1358 err_out:
1359         mutex_unlock(&serial->parent->mutex);
1360         return result;
1361 }
1362
1363 /* close the requested serial port */
1364 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1365 {
1366         struct hso_serial *serial = tty->driver_data;
1367         u8 usb_gone;
1368
1369         D1("Closing serial port");
1370
1371         /* Open failed, no close cleanup required */
1372         if (serial == NULL)
1373                 return;
1374
1375         mutex_lock(&serial->parent->mutex);
1376         usb_gone = serial->parent->usb_gone;
1377
1378         if (!usb_gone)
1379                 usb_autopm_get_interface(serial->parent->interface);
1380
1381         /* reset the rts and dtr */
1382         /* do the actual close */
1383         serial->open_count--;
1384
1385         if (serial->open_count <= 0) {
1386                 serial->open_count = 0;
1387                 spin_lock_irq(&serial->serial_lock);
1388                 if (serial->tty == tty) {
1389                         serial->tty->driver_data = NULL;
1390                         serial->tty = NULL;
1391                         tty_kref_put(tty);
1392                 }
1393                 spin_unlock_irq(&serial->serial_lock);
1394                 if (!usb_gone)
1395                         hso_stop_serial_device(serial->parent);
1396                 tasklet_kill(&serial->unthrottle_tasklet);
1397                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1398         }
1399
1400         if (!usb_gone)
1401                 usb_autopm_put_interface(serial->parent->interface);
1402
1403         mutex_unlock(&serial->parent->mutex);
1404
1405         kref_put(&serial->parent->ref, hso_serial_ref_free);
1406 }
1407
1408 /* close the requested serial port */
1409 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1410                             int count)
1411 {
1412         struct hso_serial *serial = get_serial_by_tty(tty);
1413         int space, tx_bytes;
1414         unsigned long flags;
1415
1416         /* sanity check */
1417         if (serial == NULL) {
1418                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1419                 return -ENODEV;
1420         }
1421
1422         spin_lock_irqsave(&serial->serial_lock, flags);
1423
1424         space = serial->tx_data_length - serial->tx_buffer_count;
1425         tx_bytes = (count < space) ? count : space;
1426
1427         if (!tx_bytes)
1428                 goto out;
1429
1430         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1431         serial->tx_buffer_count += tx_bytes;
1432
1433 out:
1434         spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436         hso_kick_transmit(serial);
1437         /* done */
1438         return tx_bytes;
1439 }
1440
1441 /* how much room is there for writing */
1442 static int hso_serial_write_room(struct tty_struct *tty)
1443 {
1444         struct hso_serial *serial = get_serial_by_tty(tty);
1445         int room;
1446         unsigned long flags;
1447
1448         spin_lock_irqsave(&serial->serial_lock, flags);
1449         room = serial->tx_data_length - serial->tx_buffer_count;
1450         spin_unlock_irqrestore(&serial->serial_lock, flags);
1451
1452         /* return free room */
1453         return room;
1454 }
1455
1456 /* setup the term */
1457 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1458 {
1459         struct hso_serial *serial = get_serial_by_tty(tty);
1460         unsigned long flags;
1461
1462         if (old)
1463                 D5("Termios called with: cflags new[%d] - old[%d]",
1464                    tty->termios->c_cflag, old->c_cflag);
1465
1466         /* the actual setup */
1467         spin_lock_irqsave(&serial->serial_lock, flags);
1468         if (serial->open_count)
1469                 _hso_serial_set_termios(tty, old);
1470         else
1471                 tty->termios = old;
1472         spin_unlock_irqrestore(&serial->serial_lock, flags);
1473
1474         /* done */
1475         return;
1476 }
1477
1478 /* how many characters in the buffer */
1479 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1480 {
1481         struct hso_serial *serial = get_serial_by_tty(tty);
1482         int chars;
1483         unsigned long flags;
1484
1485         /* sanity check */
1486         if (serial == NULL)
1487                 return 0;
1488
1489         spin_lock_irqsave(&serial->serial_lock, flags);
1490         chars = serial->tx_buffer_count;
1491         spin_unlock_irqrestore(&serial->serial_lock, flags);
1492
1493         return chars;
1494 }
1495 static int tiocmget_submit_urb(struct hso_serial *serial,
1496                                struct hso_tiocmget *tiocmget,
1497                                struct usb_device *usb)
1498 {
1499         int result;
1500
1501         if (serial->parent->usb_gone)
1502                 return -ENODEV;
1503         usb_fill_int_urb(tiocmget->urb, usb,
1504                          usb_rcvintpipe(usb,
1505                                         tiocmget->endp->
1506                                         bEndpointAddress & 0x7F),
1507                          &tiocmget->serial_state_notification,
1508                          sizeof(struct hso_serial_state_notification),
1509                          tiocmget_intr_callback, serial,
1510                          tiocmget->endp->bInterval);
1511         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1512         if (result) {
1513                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1514                          result);
1515         }
1516         return result;
1517
1518 }
1519
1520 static void tiocmget_intr_callback(struct urb *urb)
1521 {
1522         struct hso_serial *serial = urb->context;
1523         struct hso_tiocmget *tiocmget;
1524         int status = urb->status;
1525         u16 UART_state_bitmap, prev_UART_state_bitmap;
1526         struct uart_icount *icount;
1527         struct hso_serial_state_notification *serial_state_notification;
1528         struct usb_device *usb;
1529
1530         /* Sanity checks */
1531         if (!serial)
1532                 return;
1533         if (status) {
1534                 handle_usb_error(status, __func__, serial->parent);
1535                 return;
1536         }
1537         tiocmget = serial->tiocmget;
1538         if (!tiocmget)
1539                 return;
1540         usb = serial->parent->usb;
1541         serial_state_notification = &tiocmget->serial_state_notification;
1542         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1543             serial_state_notification->bNotification != B_NOTIFICATION ||
1544             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1545             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1546             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1547                 dev_warn(&usb->dev,
1548                          "hso received invalid serial state notification\n");
1549                 DUMP(serial_state_notification,
1550                      sizeof(struct hso_serial_state_notification));
1551         } else {
1552
1553                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1554                                                 UART_state_bitmap);
1555                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1556                 icount = &tiocmget->icount;
1557                 spin_lock(&serial->serial_lock);
1558                 if ((UART_state_bitmap & B_OVERRUN) !=
1559                    (prev_UART_state_bitmap & B_OVERRUN))
1560                         icount->parity++;
1561                 if ((UART_state_bitmap & B_PARITY) !=
1562                    (prev_UART_state_bitmap & B_PARITY))
1563                         icount->parity++;
1564                 if ((UART_state_bitmap & B_FRAMING) !=
1565                    (prev_UART_state_bitmap & B_FRAMING))
1566                         icount->frame++;
1567                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1568                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1569                         icount->rng++;
1570                 if ((UART_state_bitmap & B_BREAK) !=
1571                    (prev_UART_state_bitmap & B_BREAK))
1572                         icount->brk++;
1573                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1574                    (prev_UART_state_bitmap & B_TX_CARRIER))
1575                         icount->dsr++;
1576                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1577                    (prev_UART_state_bitmap & B_RX_CARRIER))
1578                         icount->dcd++;
1579                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1580                 spin_unlock(&serial->serial_lock);
1581                 tiocmget->intr_completed = 1;
1582                 wake_up_interruptible(&tiocmget->waitq);
1583         }
1584         memset(serial_state_notification, 0,
1585                sizeof(struct hso_serial_state_notification));
1586         tiocmget_submit_urb(serial,
1587                             tiocmget,
1588                             serial->parent->usb);
1589 }
1590
1591 /*
1592  * next few functions largely stolen from drivers/serial/serial_core.c
1593  */
1594 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1595  * - mask passed in arg for lines of interest
1596  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1597  * Caller should use TIOCGICOUNT to see which one it was
1598  */
1599 static int
1600 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1601 {
1602         DECLARE_WAITQUEUE(wait, current);
1603         struct uart_icount cprev, cnow;
1604         struct hso_tiocmget  *tiocmget;
1605         int ret;
1606
1607         tiocmget = serial->tiocmget;
1608         if (!tiocmget)
1609                 return -ENOENT;
1610         /*
1611          * note the counters on entry
1612          */
1613         spin_lock_irq(&serial->serial_lock);
1614         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1615         spin_unlock_irq(&serial->serial_lock);
1616         add_wait_queue(&tiocmget->waitq, &wait);
1617         for (;;) {
1618                 spin_lock_irq(&serial->serial_lock);
1619                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1620                 spin_unlock_irq(&serial->serial_lock);
1621                 set_current_state(TASK_INTERRUPTIBLE);
1622                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1623                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1624                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1625                         ret = 0;
1626                         break;
1627                 }
1628                 schedule();
1629                 /* see if a signal did it */
1630                 if (signal_pending(current)) {
1631                         ret = -ERESTARTSYS;
1632                         break;
1633                 }
1634                 cprev = cnow;
1635         }
1636         current->state = TASK_RUNNING;
1637         remove_wait_queue(&tiocmget->waitq, &wait);
1638
1639         return ret;
1640 }
1641
1642 /*
1643  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1644  * Return: write counters to the user passed counter struct
1645  * NB: both 1->0 and 0->1 transitions are counted except for
1646  *     RI where only 0->1 is counted.
1647  */
1648 static int hso_get_count(struct hso_serial *serial,
1649                           struct serial_icounter_struct __user *icnt)
1650 {
1651         struct serial_icounter_struct icount;
1652         struct uart_icount cnow;
1653         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1654
1655         if (!tiocmget)
1656                  return -ENOENT;
1657         spin_lock_irq(&serial->serial_lock);
1658         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1659         spin_unlock_irq(&serial->serial_lock);
1660
1661         icount.cts         = cnow.cts;
1662         icount.dsr         = cnow.dsr;
1663         icount.rng         = cnow.rng;
1664         icount.dcd         = cnow.dcd;
1665         icount.rx          = cnow.rx;
1666         icount.tx          = cnow.tx;
1667         icount.frame       = cnow.frame;
1668         icount.overrun     = cnow.overrun;
1669         icount.parity      = cnow.parity;
1670         icount.brk         = cnow.brk;
1671         icount.buf_overrun = cnow.buf_overrun;
1672
1673         return copy_to_user(icnt, &icount, sizeof(icount)) ? -EFAULT : 0;
1674 }
1675
1676
1677 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1678 {
1679         int retval;
1680         struct hso_serial *serial = get_serial_by_tty(tty);
1681         struct hso_tiocmget  *tiocmget;
1682         u16 UART_state_bitmap;
1683
1684         /* sanity check */
1685         if (!serial) {
1686                 D1("no tty structures");
1687                 return -EINVAL;
1688         }
1689         spin_lock_irq(&serial->serial_lock);
1690         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1691             ((serial->dtr_state) ? TIOCM_DTR : 0);
1692         tiocmget = serial->tiocmget;
1693         if (tiocmget) {
1694
1695                 UART_state_bitmap = le16_to_cpu(
1696                         tiocmget->prev_UART_state_bitmap);
1697                 if (UART_state_bitmap & B_RING_SIGNAL)
1698                         retval |=  TIOCM_RNG;
1699                 if (UART_state_bitmap & B_RX_CARRIER)
1700                         retval |=  TIOCM_CD;
1701                 if (UART_state_bitmap & B_TX_CARRIER)
1702                         retval |=  TIOCM_DSR;
1703         }
1704         spin_unlock_irq(&serial->serial_lock);
1705         return retval;
1706 }
1707
1708 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1709                                unsigned int set, unsigned int clear)
1710 {
1711         int val = 0;
1712         unsigned long flags;
1713         int if_num;
1714         struct hso_serial *serial = get_serial_by_tty(tty);
1715
1716         /* sanity check */
1717         if (!serial) {
1718                 D1("no tty structures");
1719                 return -EINVAL;
1720         }
1721
1722         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1723                 return -EINVAL;
1724
1725         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1726
1727         spin_lock_irqsave(&serial->serial_lock, flags);
1728         if (set & TIOCM_RTS)
1729                 serial->rts_state = 1;
1730         if (set & TIOCM_DTR)
1731                 serial->dtr_state = 1;
1732
1733         if (clear & TIOCM_RTS)
1734                 serial->rts_state = 0;
1735         if (clear & TIOCM_DTR)
1736                 serial->dtr_state = 0;
1737
1738         if (serial->dtr_state)
1739                 val |= 0x01;
1740         if (serial->rts_state)
1741                 val |= 0x02;
1742
1743         spin_unlock_irqrestore(&serial->serial_lock, flags);
1744
1745         return usb_control_msg(serial->parent->usb,
1746                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1747                                0x21, val, if_num, NULL, 0,
1748                                USB_CTRL_SET_TIMEOUT);
1749 }
1750
1751 static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
1752                             unsigned int cmd, unsigned long arg)
1753 {
1754         struct hso_serial *serial =  get_serial_by_tty(tty);
1755         void __user *uarg = (void __user *)arg;
1756         int ret = 0;
1757         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1758
1759         if (!serial)
1760                 return -ENODEV;
1761         switch (cmd) {
1762         case TIOCMIWAIT:
1763                 ret = hso_wait_modem_status(serial, arg);
1764                 break;
1765
1766         case TIOCGICOUNT:
1767                 ret = hso_get_count(serial, uarg);
1768                 break;
1769         default:
1770                 ret = -ENOIOCTLCMD;
1771                 break;
1772         }
1773         return ret;
1774 }
1775
1776
1777 /* starts a transmit */
1778 static void hso_kick_transmit(struct hso_serial *serial)
1779 {
1780         u8 *temp;
1781         unsigned long flags;
1782         int res;
1783
1784         spin_lock_irqsave(&serial->serial_lock, flags);
1785         if (!serial->tx_buffer_count)
1786                 goto out;
1787
1788         if (serial->tx_urb_used)
1789                 goto out;
1790
1791         /* Wakeup USB interface if necessary */
1792         if (hso_get_activity(serial->parent) == -EAGAIN)
1793                 goto out;
1794
1795         /* Switch pointers around to avoid memcpy */
1796         temp = serial->tx_buffer;
1797         serial->tx_buffer = serial->tx_data;
1798         serial->tx_data = temp;
1799         serial->tx_data_count = serial->tx_buffer_count;
1800         serial->tx_buffer_count = 0;
1801
1802         /* If temp is set, it means we switched buffers */
1803         if (temp && serial->write_data) {
1804                 res = serial->write_data(serial);
1805                 if (res >= 0)
1806                         serial->tx_urb_used = 1;
1807         }
1808 out:
1809         spin_unlock_irqrestore(&serial->serial_lock, flags);
1810 }
1811
1812 /* make a request (for reading and writing data to muxed serial port) */
1813 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1814                               struct urb *ctrl_urb,
1815                               struct usb_ctrlrequest *ctrl_req,
1816                               u8 *ctrl_urb_data, u32 size)
1817 {
1818         int result;
1819         int pipe;
1820
1821         /* Sanity check */
1822         if (!serial || !ctrl_urb || !ctrl_req) {
1823                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1824                 return -EINVAL;
1825         }
1826
1827         /* initialize */
1828         ctrl_req->wValue = 0;
1829         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1830         ctrl_req->wLength = cpu_to_le16(size);
1831
1832         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1833                 /* Reading command */
1834                 ctrl_req->bRequestType = USB_DIR_IN |
1835                                          USB_TYPE_OPTION_VENDOR |
1836                                          USB_RECIP_INTERFACE;
1837                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1838                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1839         } else {
1840                 /* Writing command */
1841                 ctrl_req->bRequestType = USB_DIR_OUT |
1842                                          USB_TYPE_OPTION_VENDOR |
1843                                          USB_RECIP_INTERFACE;
1844                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1845                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1846         }
1847         /* syslog */
1848         D2("%s command (%02x) len: %d, port: %d",
1849            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1850            ctrl_req->bRequestType, ctrl_req->wLength, port);
1851
1852         /* Load ctrl urb */
1853         ctrl_urb->transfer_flags = 0;
1854         usb_fill_control_urb(ctrl_urb,
1855                              serial->parent->usb,
1856                              pipe,
1857                              (u8 *) ctrl_req,
1858                              ctrl_urb_data, size, ctrl_callback, serial);
1859         /* Send it on merry way */
1860         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1861         if (result) {
1862                 dev_err(&ctrl_urb->dev->dev,
1863                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1864                         result, type);
1865                 return result;
1866         }
1867
1868         /* done */
1869         return size;
1870 }
1871
1872 /* called by intr_callback when read occurs */
1873 static int hso_mux_serial_read(struct hso_serial *serial)
1874 {
1875         if (!serial)
1876                 return -EINVAL;
1877
1878         /* clean data */
1879         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1880         /* make the request */
1881
1882         if (serial->num_rx_urbs != 1) {
1883                 dev_err(&serial->parent->interface->dev,
1884                         "ERROR: mux'd reads with multiple buffers "
1885                         "not possible\n");
1886                 return 0;
1887         }
1888         return mux_device_request(serial,
1889                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1890                                   serial->parent->port_spec & HSO_PORT_MASK,
1891                                   serial->rx_urb[0],
1892                                   &serial->ctrl_req_rx,
1893                                   serial->rx_data[0], serial->rx_data_length);
1894 }
1895
1896 /* used for muxed serial port callback (muxed serial read) */
1897 static void intr_callback(struct urb *urb)
1898 {
1899         struct hso_shared_int *shared_int = urb->context;
1900         struct hso_serial *serial;
1901         unsigned char *port_req;
1902         int status = urb->status;
1903         int i;
1904
1905         usb_mark_last_busy(urb->dev);
1906
1907         /* sanity check */
1908         if (!shared_int)
1909                 return;
1910
1911         /* status check */
1912         if (status) {
1913                 handle_usb_error(status, __func__, NULL);
1914                 return;
1915         }
1916         D4("\n--- Got intr callback 0x%02X ---", status);
1917
1918         /* what request? */
1919         port_req = urb->transfer_buffer;
1920         D4(" port_req = 0x%.2X\n", *port_req);
1921         /* loop over all muxed ports to find the one sending this */
1922         for (i = 0; i < 8; i++) {
1923                 /* max 8 channels on MUX */
1924                 if (*port_req & (1 << i)) {
1925                         serial = get_serial_by_shared_int_and_type(shared_int,
1926                                                                    (1 << i));
1927                         if (serial != NULL) {
1928                                 D1("Pending read interrupt on port %d\n", i);
1929                                 spin_lock(&serial->serial_lock);
1930                                 if (serial->rx_state == RX_IDLE &&
1931                                         serial->open_count > 0) {
1932                                         /* Setup and send a ctrl req read on
1933                                          * port i */
1934                                         if (!serial->rx_urb_filled[0]) {
1935                                                 serial->rx_state = RX_SENT;
1936                                                 hso_mux_serial_read(serial);
1937                                         } else
1938                                                 serial->rx_state = RX_PENDING;
1939                                 } else {
1940                                         D1("Already a read pending on "
1941                                            "port %d or port not open\n", i);
1942                                 }
1943                                 spin_unlock(&serial->serial_lock);
1944                         }
1945                 }
1946         }
1947         /* Resubmit interrupt urb */
1948         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1949 }
1950
1951 /* called for writing to muxed serial port */
1952 static int hso_mux_serial_write_data(struct hso_serial *serial)
1953 {
1954         if (NULL == serial)
1955                 return -EINVAL;
1956
1957         return mux_device_request(serial,
1958                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1959                                   serial->parent->port_spec & HSO_PORT_MASK,
1960                                   serial->tx_urb,
1961                                   &serial->ctrl_req_tx,
1962                                   serial->tx_data, serial->tx_data_count);
1963 }
1964
1965 /* write callback for Diag and CS port */
1966 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1967 {
1968         struct hso_serial *serial = urb->context;
1969         int status = urb->status;
1970         struct tty_struct *tty;
1971
1972         /* sanity check */
1973         if (!serial) {
1974                 D1("serial == NULL");
1975                 return;
1976         }
1977
1978         spin_lock(&serial->serial_lock);
1979         serial->tx_urb_used = 0;
1980         tty = tty_kref_get(serial->tty);
1981         spin_unlock(&serial->serial_lock);
1982         if (status) {
1983                 handle_usb_error(status, __func__, serial->parent);
1984                 tty_kref_put(tty);
1985                 return;
1986         }
1987         hso_put_activity(serial->parent);
1988         if (tty) {
1989                 tty_wakeup(tty);
1990                 tty_kref_put(tty);
1991         }
1992         hso_kick_transmit(serial);
1993
1994         D1(" ");
1995         return;
1996 }
1997
1998 /* called for writing diag or CS serial port */
1999 static int hso_std_serial_write_data(struct hso_serial *serial)
2000 {
2001         int count = serial->tx_data_count;
2002         int result;
2003
2004         usb_fill_bulk_urb(serial->tx_urb,
2005                           serial->parent->usb,
2006                           usb_sndbulkpipe(serial->parent->usb,
2007                                           serial->out_endp->
2008                                           bEndpointAddress & 0x7F),
2009                           serial->tx_data, serial->tx_data_count,
2010                           hso_std_serial_write_bulk_callback, serial);
2011
2012         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
2013         if (result) {
2014                 dev_warn(&serial->parent->usb->dev,
2015                          "Failed to submit urb - res %d\n", result);
2016                 return result;
2017         }
2018
2019         return count;
2020 }
2021
2022 /* callback after read or write on muxed serial port */
2023 static void ctrl_callback(struct urb *urb)
2024 {
2025         struct hso_serial *serial = urb->context;
2026         struct usb_ctrlrequest *req;
2027         int status = urb->status;
2028         struct tty_struct *tty;
2029
2030         /* sanity check */
2031         if (!serial)
2032                 return;
2033
2034         spin_lock(&serial->serial_lock);
2035         serial->tx_urb_used = 0;
2036         tty = tty_kref_get(serial->tty);
2037         spin_unlock(&serial->serial_lock);
2038         if (status) {
2039                 handle_usb_error(status, __func__, serial->parent);
2040                 tty_kref_put(tty);
2041                 return;
2042         }
2043
2044         /* what request? */
2045         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2046         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2047         D4("Actual length of urb = %d\n", urb->actual_length);
2048         DUMP1(urb->transfer_buffer, urb->actual_length);
2049
2050         if (req->bRequestType ==
2051             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2052                 /* response to a read command */
2053                 serial->rx_urb_filled[0] = 1;
2054                 spin_lock(&serial->serial_lock);
2055                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2056                 spin_unlock(&serial->serial_lock);
2057         } else {
2058                 hso_put_activity(serial->parent);
2059                 if (tty)
2060                         tty_wakeup(tty);
2061                 /* response to a write command */
2062                 hso_kick_transmit(serial);
2063         }
2064         tty_kref_put(tty);
2065 }
2066
2067 /* handle RX data for serial port */
2068 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2069 {
2070         struct tty_struct *tty;
2071         int write_length_remaining = 0;
2072         int curr_write_len;
2073
2074         /* Sanity check */
2075         if (urb == NULL || serial == NULL) {
2076                 D1("serial = NULL");
2077                 return -2;
2078         }
2079
2080         /* All callers to put_rxbuf_data hold serial_lock */
2081         tty = tty_kref_get(serial->tty);
2082
2083         /* Push data to tty */
2084         if (tty) {
2085                 write_length_remaining = urb->actual_length -
2086                         serial->curr_rx_urb_offset;
2087                 D1("data to push to tty");
2088                 while (write_length_remaining) {
2089                         if (test_bit(TTY_THROTTLED, &tty->flags)) {
2090                                 tty_kref_put(tty);
2091                                 return -1;
2092                         }
2093                         curr_write_len =  tty_insert_flip_string
2094                                 (tty, urb->transfer_buffer +
2095                                  serial->curr_rx_urb_offset,
2096                                  write_length_remaining);
2097                         serial->curr_rx_urb_offset += curr_write_len;
2098                         write_length_remaining -= curr_write_len;
2099                         tty_flip_buffer_push(tty);
2100                 }
2101         }
2102         if (write_length_remaining == 0) {
2103                 serial->curr_rx_urb_offset = 0;
2104                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2105         }
2106         tty_kref_put(tty);
2107         return write_length_remaining;
2108 }
2109
2110
2111 /* Base driver functions */
2112
2113 static void hso_log_port(struct hso_device *hso_dev)
2114 {
2115         char *port_type;
2116         char port_dev[20];
2117
2118         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2119         case HSO_PORT_CONTROL:
2120                 port_type = "Control";
2121                 break;
2122         case HSO_PORT_APP:
2123                 port_type = "Application";
2124                 break;
2125         case HSO_PORT_GPS:
2126                 port_type = "GPS";
2127                 break;
2128         case HSO_PORT_GPS_CONTROL:
2129                 port_type = "GPS control";
2130                 break;
2131         case HSO_PORT_APP2:
2132                 port_type = "Application2";
2133                 break;
2134         case HSO_PORT_PCSC:
2135                 port_type = "PCSC";
2136                 break;
2137         case HSO_PORT_DIAG:
2138                 port_type = "Diagnostic";
2139                 break;
2140         case HSO_PORT_DIAG2:
2141                 port_type = "Diagnostic2";
2142                 break;
2143         case HSO_PORT_MODEM:
2144                 port_type = "Modem";
2145                 break;
2146         case HSO_PORT_NETWORK:
2147                 port_type = "Network";
2148                 break;
2149         default:
2150                 port_type = "Unknown";
2151                 break;
2152         }
2153         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2154                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2155         } else
2156                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2157                         dev2ser(hso_dev)->minor);
2158
2159         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2160                 port_type, port_dev);
2161 }
2162
2163 static int hso_start_net_device(struct hso_device *hso_dev)
2164 {
2165         int i, result = 0;
2166         struct hso_net *hso_net = dev2net(hso_dev);
2167
2168         if (!hso_net)
2169                 return -ENODEV;
2170
2171         /* send URBs for all read buffers */
2172         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2173
2174                 /* Prep a receive URB */
2175                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2176                                   hso_dev->usb,
2177                                   usb_rcvbulkpipe(hso_dev->usb,
2178                                                   hso_net->in_endp->
2179                                                   bEndpointAddress & 0x7F),
2180                                   hso_net->mux_bulk_rx_buf_pool[i],
2181                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2182                                   hso_net);
2183
2184                 /* Put it out there so the device can send us stuff */
2185                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2186                                         GFP_NOIO);
2187                 if (result)
2188                         dev_warn(&hso_dev->usb->dev,
2189                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2190                                 i, result);
2191         }
2192
2193         return result;
2194 }
2195
2196 static int hso_stop_net_device(struct hso_device *hso_dev)
2197 {
2198         int i;
2199         struct hso_net *hso_net = dev2net(hso_dev);
2200
2201         if (!hso_net)
2202                 return -ENODEV;
2203
2204         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2205                 if (hso_net->mux_bulk_rx_urb_pool[i])
2206                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2207
2208         }
2209         if (hso_net->mux_bulk_tx_urb)
2210                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2211
2212         return 0;
2213 }
2214
2215 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2216 {
2217         int i, result = 0;
2218         struct hso_serial *serial = dev2ser(hso_dev);
2219
2220         if (!serial)
2221                 return -ENODEV;
2222
2223         /* If it is not the MUX port fill in and submit a bulk urb (already
2224          * allocated in hso_serial_start) */
2225         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2226                 for (i = 0; i < serial->num_rx_urbs; i++) {
2227                         usb_fill_bulk_urb(serial->rx_urb[i],
2228                                           serial->parent->usb,
2229                                           usb_rcvbulkpipe(serial->parent->usb,
2230                                                           serial->in_endp->
2231                                                           bEndpointAddress &
2232                                                           0x7F),
2233                                           serial->rx_data[i],
2234                                           serial->rx_data_length,
2235                                           hso_std_serial_read_bulk_callback,
2236                                           serial);
2237                         result = usb_submit_urb(serial->rx_urb[i], flags);
2238                         if (result) {
2239                                 dev_warn(&serial->parent->usb->dev,
2240                                          "Failed to submit urb - res %d\n",
2241                                          result);
2242                                 break;
2243                         }
2244                 }
2245         } else {
2246                 mutex_lock(&serial->shared_int->shared_int_lock);
2247                 if (!serial->shared_int->use_count) {
2248                         result =
2249                             hso_mux_submit_intr_urb(serial->shared_int,
2250                                                     hso_dev->usb, flags);
2251                 }
2252                 serial->shared_int->use_count++;
2253                 mutex_unlock(&serial->shared_int->shared_int_lock);
2254         }
2255         if (serial->tiocmget)
2256                 tiocmget_submit_urb(serial,
2257                                     serial->tiocmget,
2258                                     serial->parent->usb);
2259         return result;
2260 }
2261
2262 static int hso_stop_serial_device(struct hso_device *hso_dev)
2263 {
2264         int i;
2265         struct hso_serial *serial = dev2ser(hso_dev);
2266         struct hso_tiocmget  *tiocmget;
2267
2268         if (!serial)
2269                 return -ENODEV;
2270
2271         for (i = 0; i < serial->num_rx_urbs; i++) {
2272                 if (serial->rx_urb[i]) {
2273                                 usb_kill_urb(serial->rx_urb[i]);
2274                                 serial->rx_urb_filled[i] = 0;
2275                 }
2276         }
2277         serial->curr_rx_urb_idx = 0;
2278         serial->curr_rx_urb_offset = 0;
2279
2280         if (serial->tx_urb)
2281                 usb_kill_urb(serial->tx_urb);
2282
2283         if (serial->shared_int) {
2284                 mutex_lock(&serial->shared_int->shared_int_lock);
2285                 if (serial->shared_int->use_count &&
2286                     (--serial->shared_int->use_count == 0)) {
2287                         struct urb *urb;
2288
2289                         urb = serial->shared_int->shared_intr_urb;
2290                         if (urb)
2291                                 usb_kill_urb(urb);
2292                 }
2293                 mutex_unlock(&serial->shared_int->shared_int_lock);
2294         }
2295         tiocmget = serial->tiocmget;
2296         if (tiocmget) {
2297                 wake_up_interruptible(&tiocmget->waitq);
2298                 usb_kill_urb(tiocmget->urb);
2299         }
2300
2301         return 0;
2302 }
2303
2304 static void hso_serial_common_free(struct hso_serial *serial)
2305 {
2306         int i;
2307
2308         if (serial->parent->dev)
2309                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2310
2311         tty_unregister_device(tty_drv, serial->minor);
2312
2313         for (i = 0; i < serial->num_rx_urbs; i++) {
2314                 /* unlink and free RX URB */
2315                 usb_free_urb(serial->rx_urb[i]);
2316                 /* free the RX buffer */
2317                 kfree(serial->rx_data[i]);
2318         }
2319
2320         /* unlink and free TX URB */
2321         usb_free_urb(serial->tx_urb);
2322         kfree(serial->tx_data);
2323 }
2324
2325 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2326                                     int rx_size, int tx_size)
2327 {
2328         struct device *dev;
2329         int minor;
2330         int i;
2331
2332         minor = get_free_serial_index();
2333         if (minor < 0)
2334                 goto exit;
2335
2336         /* register our minor number */
2337         serial->parent->dev = tty_register_device(tty_drv, minor,
2338                                         &serial->parent->interface->dev);
2339         dev = serial->parent->dev;
2340         dev_set_drvdata(dev, serial->parent);
2341         i = device_create_file(dev, &dev_attr_hsotype);
2342
2343         /* fill in specific data for later use */
2344         serial->minor = minor;
2345         serial->magic = HSO_SERIAL_MAGIC;
2346         spin_lock_init(&serial->serial_lock);
2347         serial->num_rx_urbs = num_urbs;
2348
2349         /* RX, allocate urb and initialize */
2350
2351         /* prepare our RX buffer */
2352         serial->rx_data_length = rx_size;
2353         for (i = 0; i < serial->num_rx_urbs; i++) {
2354                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2355                 if (!serial->rx_urb[i]) {
2356                         dev_err(dev, "Could not allocate urb?\n");
2357                         goto exit;
2358                 }
2359                 serial->rx_urb[i]->transfer_buffer = NULL;
2360                 serial->rx_urb[i]->transfer_buffer_length = 0;
2361                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2362                                              GFP_KERNEL);
2363                 if (!serial->rx_data[i]) {
2364                         dev_err(dev, "%s - Out of memory\n", __func__);
2365                         goto exit;
2366                 }
2367         }
2368
2369         /* TX, allocate urb and initialize */
2370         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2371         if (!serial->tx_urb) {
2372                 dev_err(dev, "Could not allocate urb?\n");
2373                 goto exit;
2374         }
2375         serial->tx_urb->transfer_buffer = NULL;
2376         serial->tx_urb->transfer_buffer_length = 0;
2377         /* prepare our TX buffer */
2378         serial->tx_data_count = 0;
2379         serial->tx_buffer_count = 0;
2380         serial->tx_data_length = tx_size;
2381         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2382         if (!serial->tx_data) {
2383                 dev_err(dev, "%s - Out of memory\n", __func__);
2384                 goto exit;
2385         }
2386         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2387         if (!serial->tx_buffer) {
2388                 dev_err(dev, "%s - Out of memory\n", __func__);
2389                 goto exit;
2390         }
2391
2392         return 0;
2393 exit:
2394         hso_serial_common_free(serial);
2395         return -1;
2396 }
2397
2398 /* Creates a general hso device */
2399 static struct hso_device *hso_create_device(struct usb_interface *intf,
2400                                             int port_spec)
2401 {
2402         struct hso_device *hso_dev;
2403
2404         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2405         if (!hso_dev)
2406                 return NULL;
2407
2408         hso_dev->port_spec = port_spec;
2409         hso_dev->usb = interface_to_usbdev(intf);
2410         hso_dev->interface = intf;
2411         kref_init(&hso_dev->ref);
2412         mutex_init(&hso_dev->mutex);
2413
2414         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2415         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2416         INIT_WORK(&hso_dev->reset_device, reset_device);
2417
2418         return hso_dev;
2419 }
2420
2421 /* Removes a network device in the network device table */
2422 static int remove_net_device(struct hso_device *hso_dev)
2423 {
2424         int i;
2425
2426         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2427                 if (network_table[i] == hso_dev) {
2428                         network_table[i] = NULL;
2429                         break;
2430                 }
2431         }
2432         if (i == HSO_MAX_NET_DEVICES)
2433                 return -1;
2434         return 0;
2435 }
2436
2437 /* Frees our network device */
2438 static void hso_free_net_device(struct hso_device *hso_dev)
2439 {
2440         int i;
2441         struct hso_net *hso_net = dev2net(hso_dev);
2442
2443         if (!hso_net)
2444                 return;
2445
2446         remove_net_device(hso_net->parent);
2447
2448         if (hso_net->net) {
2449                 unregister_netdev(hso_net->net);
2450                 free_netdev(hso_net->net);
2451         }
2452
2453         /* start freeing */
2454         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2455                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2456                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2457                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2458         }
2459         usb_free_urb(hso_net->mux_bulk_tx_urb);
2460         kfree(hso_net->mux_bulk_tx_buf);
2461         hso_net->mux_bulk_tx_buf = NULL;
2462
2463         kfree(hso_dev);
2464 }
2465
2466 static const struct net_device_ops hso_netdev_ops = {
2467         .ndo_open       = hso_net_open,
2468         .ndo_stop       = hso_net_close,
2469         .ndo_start_xmit = hso_net_start_xmit,
2470         .ndo_tx_timeout = hso_net_tx_timeout,
2471 };
2472
2473 /* initialize the network interface */
2474 static void hso_net_init(struct net_device *net)
2475 {
2476         struct hso_net *hso_net = netdev_priv(net);
2477
2478         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2479
2480         /* fill in the other fields */
2481         net->netdev_ops = &hso_netdev_ops;
2482         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2483         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2484         net->type = ARPHRD_NONE;
2485         net->mtu = DEFAULT_MTU - 14;
2486         net->tx_queue_len = 10;
2487         SET_ETHTOOL_OPS(net, &ops);
2488
2489         /* and initialize the semaphore */
2490         spin_lock_init(&hso_net->net_lock);
2491 }
2492
2493 /* Adds a network device in the network device table */
2494 static int add_net_device(struct hso_device *hso_dev)
2495 {
2496         int i;
2497
2498         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2499                 if (network_table[i] == NULL) {
2500                         network_table[i] = hso_dev;
2501                         break;
2502                 }
2503         }
2504         if (i == HSO_MAX_NET_DEVICES)
2505                 return -1;
2506         return 0;
2507 }
2508
2509 static int hso_rfkill_set_block(void *data, bool blocked)
2510 {
2511         struct hso_device *hso_dev = data;
2512         int enabled = !blocked;
2513         int rv;
2514
2515         mutex_lock(&hso_dev->mutex);
2516         if (hso_dev->usb_gone)
2517                 rv = 0;
2518         else
2519                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2520                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2521                                        USB_CTRL_SET_TIMEOUT);
2522         mutex_unlock(&hso_dev->mutex);
2523         return rv;
2524 }
2525
2526 static const struct rfkill_ops hso_rfkill_ops = {
2527         .set_block = hso_rfkill_set_block,
2528 };
2529
2530 /* Creates and sets up everything for rfkill */
2531 static void hso_create_rfkill(struct hso_device *hso_dev,
2532                              struct usb_interface *interface)
2533 {
2534         struct hso_net *hso_net = dev2net(hso_dev);
2535         struct device *dev = &hso_net->net->dev;
2536         char *rfkn;
2537
2538         rfkn = kzalloc(20, GFP_KERNEL);
2539         if (!rfkn)
2540                 dev_err(dev, "%s - Out of memory\n", __func__);
2541
2542         snprintf(rfkn, 20, "hso-%d",
2543                  interface->altsetting->desc.bInterfaceNumber);
2544
2545         hso_net->rfkill = rfkill_alloc(rfkn,
2546                                        &interface_to_usbdev(interface)->dev,
2547                                        RFKILL_TYPE_WWAN,
2548                                        &hso_rfkill_ops, hso_dev);
2549         if (!hso_net->rfkill) {
2550                 dev_err(dev, "%s - Out of memory\n", __func__);
2551                 kfree(rfkn);
2552                 return;
2553         }
2554         if (rfkill_register(hso_net->rfkill) < 0) {
2555                 rfkill_destroy(hso_net->rfkill);
2556                 kfree(rfkn);
2557                 hso_net->rfkill = NULL;
2558                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2559                 return;
2560         }
2561 }
2562
2563 static struct device_type hso_type = {
2564         .name   = "wwan",
2565 };
2566
2567 /* Creates our network device */
2568 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2569                                                 int port_spec)
2570 {
2571         int result, i;
2572         struct net_device *net;
2573         struct hso_net *hso_net;
2574         struct hso_device *hso_dev;
2575
2576         hso_dev = hso_create_device(interface, port_spec);
2577         if (!hso_dev)
2578                 return NULL;
2579
2580         /* allocate our network device, then we can put in our private data */
2581         /* call hso_net_init to do the basic initialization */
2582         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2583         if (!net) {
2584                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2585                 goto exit;
2586         }
2587
2588         hso_net = netdev_priv(net);
2589
2590         hso_dev->port_data.dev_net = hso_net;
2591         hso_net->net = net;
2592         hso_net->parent = hso_dev;
2593
2594         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2595                                       USB_DIR_IN);
2596         if (!hso_net->in_endp) {
2597                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2598                 goto exit;
2599         }
2600         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2601                                        USB_DIR_OUT);
2602         if (!hso_net->out_endp) {
2603                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2604                 goto exit;
2605         }
2606         SET_NETDEV_DEV(net, &interface->dev);
2607         SET_NETDEV_DEVTYPE(net, &hso_type);
2608
2609         /* registering our net device */
2610         result = register_netdev(net);
2611         if (result) {
2612                 dev_err(&interface->dev, "Failed to register device\n");
2613                 goto exit;
2614         }
2615
2616         /* start allocating */
2617         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2618                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2619                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2620                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2621                         goto exit;
2622                 }
2623                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2624                                                            GFP_KERNEL);
2625                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2626                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2627                         goto exit;
2628                 }
2629         }
2630         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2631         if (!hso_net->mux_bulk_tx_urb) {
2632                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2633                 goto exit;
2634         }
2635         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2636         if (!hso_net->mux_bulk_tx_buf) {
2637                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2638                 goto exit;
2639         }
2640
2641         add_net_device(hso_dev);
2642
2643         hso_log_port(hso_dev);
2644
2645         hso_create_rfkill(hso_dev, interface);
2646
2647         return hso_dev;
2648 exit:
2649         hso_free_net_device(hso_dev);
2650         return NULL;
2651 }
2652
2653 static void hso_free_tiomget(struct hso_serial *serial)
2654 {
2655         struct hso_tiocmget *tiocmget = serial->tiocmget;
2656         if (tiocmget) {
2657                 if (tiocmget->urb) {
2658                         usb_free_urb(tiocmget->urb);
2659                         tiocmget->urb = NULL;
2660                 }
2661                 serial->tiocmget = NULL;
2662                 kfree(tiocmget);
2663
2664         }
2665 }
2666
2667 /* Frees an AT channel ( goes for both mux and non-mux ) */
2668 static void hso_free_serial_device(struct hso_device *hso_dev)
2669 {
2670         struct hso_serial *serial = dev2ser(hso_dev);
2671
2672         if (!serial)
2673                 return;
2674         set_serial_by_index(serial->minor, NULL);
2675
2676         hso_serial_common_free(serial);
2677
2678         if (serial->shared_int) {
2679                 mutex_lock(&serial->shared_int->shared_int_lock);
2680                 if (--serial->shared_int->ref_count == 0)
2681                         hso_free_shared_int(serial->shared_int);
2682                 else
2683                         mutex_unlock(&serial->shared_int->shared_int_lock);
2684         }
2685         hso_free_tiomget(serial);
2686         kfree(serial);
2687         kfree(hso_dev);
2688 }
2689
2690 /* Creates a bulk AT channel */
2691 static struct hso_device *hso_create_bulk_serial_device(
2692                         struct usb_interface *interface, int port)
2693 {
2694         struct hso_device *hso_dev;
2695         struct hso_serial *serial;
2696         int num_urbs;
2697         struct hso_tiocmget *tiocmget;
2698
2699         hso_dev = hso_create_device(interface, port);
2700         if (!hso_dev)
2701                 return NULL;
2702
2703         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2704         if (!serial)
2705                 goto exit;
2706
2707         serial->parent = hso_dev;
2708         hso_dev->port_data.dev_serial = serial;
2709
2710         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2711                 num_urbs = 2;
2712                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2713                                            GFP_KERNEL);
2714                 /* it isn't going to break our heart if serial->tiocmget
2715                  *  allocation fails don't bother checking this.
2716                  */
2717                 if (serial->tiocmget) {
2718                         tiocmget = serial->tiocmget;
2719                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2720                         if (tiocmget->urb) {
2721                                 mutex_init(&tiocmget->mutex);
2722                                 init_waitqueue_head(&tiocmget->waitq);
2723                                 tiocmget->endp = hso_get_ep(
2724                                         interface,
2725                                         USB_ENDPOINT_XFER_INT,
2726                                         USB_DIR_IN);
2727                         } else
2728                                 hso_free_tiomget(serial);
2729                 }
2730         }
2731         else
2732                 num_urbs = 1;
2733
2734         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2735                                      BULK_URB_TX_SIZE))
2736                 goto exit;
2737
2738         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2739                                      USB_DIR_IN);
2740         if (!serial->in_endp) {
2741                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2742                 goto exit2;
2743         }
2744
2745         if (!
2746             (serial->out_endp =
2747              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2748                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2749                 goto exit2;
2750         }
2751
2752         serial->write_data = hso_std_serial_write_data;
2753
2754         /* and record this serial */
2755         set_serial_by_index(serial->minor, serial);
2756
2757         /* setup the proc dirs and files if needed */
2758         hso_log_port(hso_dev);
2759
2760         /* done, return it */
2761         return hso_dev;
2762
2763 exit2:
2764         hso_serial_common_free(serial);
2765 exit:
2766         hso_free_tiomget(serial);
2767         kfree(serial);
2768         kfree(hso_dev);
2769         return NULL;
2770 }
2771
2772 /* Creates a multiplexed AT channel */
2773 static
2774 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2775                                                 int port,
2776                                                 struct hso_shared_int *mux)
2777 {
2778         struct hso_device *hso_dev;
2779         struct hso_serial *serial;
2780         int port_spec;
2781
2782         port_spec = HSO_INTF_MUX;
2783         port_spec &= ~HSO_PORT_MASK;
2784
2785         port_spec |= hso_mux_to_port(port);
2786         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2787                 return NULL;
2788
2789         hso_dev = hso_create_device(interface, port_spec);
2790         if (!hso_dev)
2791                 return NULL;
2792
2793         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2794         if (!serial)
2795                 goto exit;
2796
2797         hso_dev->port_data.dev_serial = serial;
2798         serial->parent = hso_dev;
2799
2800         if (hso_serial_common_create
2801             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2802                 goto exit;
2803
2804         serial->tx_data_length--;
2805         serial->write_data = hso_mux_serial_write_data;
2806
2807         serial->shared_int = mux;
2808         mutex_lock(&serial->shared_int->shared_int_lock);
2809         serial->shared_int->ref_count++;
2810         mutex_unlock(&serial->shared_int->shared_int_lock);
2811
2812         /* and record this serial */
2813         set_serial_by_index(serial->minor, serial);
2814
2815         /* setup the proc dirs and files if needed */
2816         hso_log_port(hso_dev);
2817
2818         /* done, return it */
2819         return hso_dev;
2820
2821 exit:
2822         if (serial) {
2823                 tty_unregister_device(tty_drv, serial->minor);
2824                 kfree(serial);
2825         }
2826         if (hso_dev)
2827                 kfree(hso_dev);
2828         return NULL;
2829
2830 }
2831
2832 static void hso_free_shared_int(struct hso_shared_int *mux)
2833 {
2834         usb_free_urb(mux->shared_intr_urb);
2835         kfree(mux->shared_intr_buf);
2836         mutex_unlock(&mux->shared_int_lock);
2837         kfree(mux);
2838 }
2839
2840 static
2841 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2842 {
2843         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2844
2845         if (!mux)
2846                 return NULL;
2847
2848         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2849                                     USB_DIR_IN);
2850         if (!mux->intr_endp) {
2851                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2852                 goto exit;
2853         }
2854
2855         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2856         if (!mux->shared_intr_urb) {
2857                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2858                 goto exit;
2859         }
2860         mux->shared_intr_buf =
2861                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2862                         GFP_KERNEL);
2863         if (!mux->shared_intr_buf) {
2864                 dev_err(&interface->dev, "Could not allocate intr buf?\n");
2865                 goto exit;
2866         }
2867
2868         mutex_init(&mux->shared_int_lock);
2869
2870         return mux;
2871
2872 exit:
2873         kfree(mux->shared_intr_buf);
2874         usb_free_urb(mux->shared_intr_urb);
2875         kfree(mux);
2876         return NULL;
2877 }
2878
2879 /* Gets the port spec for a certain interface */
2880 static int hso_get_config_data(struct usb_interface *interface)
2881 {
2882         struct usb_device *usbdev = interface_to_usbdev(interface);
2883         u8 config_data[17];
2884         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2885         s32 result;
2886
2887         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2888                             0x86, 0xC0, 0, 0, config_data, 17,
2889                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2890                 return -EIO;
2891         }
2892
2893         switch (config_data[if_num]) {
2894         case 0x0:
2895                 result = 0;
2896                 break;
2897         case 0x1:
2898                 result = HSO_PORT_DIAG;
2899                 break;
2900         case 0x2:
2901                 result = HSO_PORT_GPS;
2902                 break;
2903         case 0x3:
2904                 result = HSO_PORT_GPS_CONTROL;
2905                 break;
2906         case 0x4:
2907                 result = HSO_PORT_APP;
2908                 break;
2909         case 0x5:
2910                 result = HSO_PORT_APP2;
2911                 break;
2912         case 0x6:
2913                 result = HSO_PORT_CONTROL;
2914                 break;
2915         case 0x7:
2916                 result = HSO_PORT_NETWORK;
2917                 break;
2918         case 0x8:
2919                 result = HSO_PORT_MODEM;
2920                 break;
2921         case 0x9:
2922                 result = HSO_PORT_MSD;
2923                 break;
2924         case 0xa:
2925                 result = HSO_PORT_PCSC;
2926                 break;
2927         case 0xb:
2928                 result = HSO_PORT_VOICE;
2929                 break;
2930         default:
2931                 result = 0;
2932         }
2933
2934         if (result)
2935                 result |= HSO_INTF_BULK;
2936
2937         if (config_data[16] & 0x1)
2938                 result |= HSO_INFO_CRC_BUG;
2939
2940         return result;
2941 }
2942
2943 /* called once for each interface upon device insertion */
2944 static int hso_probe(struct usb_interface *interface,
2945                      const struct usb_device_id *id)
2946 {
2947         int mux, i, if_num, port_spec;
2948         unsigned char port_mask;
2949         struct hso_device *hso_dev = NULL;
2950         struct hso_shared_int *shared_int;
2951         struct hso_device *tmp_dev = NULL;
2952
2953         if_num = interface->altsetting->desc.bInterfaceNumber;
2954
2955         /* Get the interface/port specification from either driver_info or from
2956          * the device itself */
2957         if (id->driver_info)
2958                 port_spec = ((u32 *)(id->driver_info))[if_num];
2959         else
2960                 port_spec = hso_get_config_data(interface);
2961
2962         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2963                 dev_err(&interface->dev, "Not our interface\n");
2964                 return -ENODEV;
2965         }
2966         /* Check if we need to switch to alt interfaces prior to port
2967          * configuration */
2968         if (interface->num_altsetting > 1)
2969                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2970         interface->needs_remote_wakeup = 1;
2971
2972         /* Allocate new hso device(s) */
2973         switch (port_spec & HSO_INTF_MASK) {
2974         case HSO_INTF_MUX:
2975                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2976                         /* Create the network device */
2977                         if (!disable_net) {
2978                                 hso_dev = hso_create_net_device(interface,
2979                                                                 port_spec);
2980                                 if (!hso_dev)
2981                                         goto exit;
2982                                 tmp_dev = hso_dev;
2983                         }
2984                 }
2985
2986                 if (hso_get_mux_ports(interface, &port_mask))
2987                         /* TODO: de-allocate everything */
2988                         goto exit;
2989
2990                 shared_int = hso_create_shared_int(interface);
2991                 if (!shared_int)
2992                         goto exit;
2993
2994                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2995                         if (port_mask & i) {
2996                                 hso_dev = hso_create_mux_serial_device(
2997                                                 interface, i, shared_int);
2998                                 if (!hso_dev)
2999                                         goto exit;
3000                         }
3001                 }
3002
3003                 if (tmp_dev)
3004                         hso_dev = tmp_dev;
3005                 break;
3006
3007         case HSO_INTF_BULK:
3008                 /* It's a regular bulk interface */
3009                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) &&
3010                     !disable_net)
3011                         hso_dev = hso_create_net_device(interface, port_spec);
3012                 else
3013                         hso_dev =
3014                             hso_create_bulk_serial_device(interface, port_spec);
3015                 if (!hso_dev)
3016                         goto exit;
3017                 break;
3018         default:
3019                 goto exit;
3020         }
3021
3022         /* save our data pointer in this device */
3023         usb_set_intfdata(interface, hso_dev);
3024
3025         /* done */
3026         return 0;
3027 exit:
3028         hso_free_interface(interface);
3029         return -ENODEV;
3030 }
3031
3032 /* device removed, cleaning up */
3033 static void hso_disconnect(struct usb_interface *interface)
3034 {
3035         hso_free_interface(interface);
3036
3037         /* remove reference of our private data */
3038         usb_set_intfdata(interface, NULL);
3039 }
3040
3041 static void async_get_intf(struct work_struct *data)
3042 {
3043         struct hso_device *hso_dev =
3044             container_of(data, struct hso_device, async_get_intf);
3045         usb_autopm_get_interface(hso_dev->interface);
3046 }
3047
3048 static void async_put_intf(struct work_struct *data)
3049 {
3050         struct hso_device *hso_dev =
3051             container_of(data, struct hso_device, async_put_intf);
3052         usb_autopm_put_interface(hso_dev->interface);
3053 }
3054
3055 static int hso_get_activity(struct hso_device *hso_dev)
3056 {
3057         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3058                 if (!hso_dev->is_active) {
3059                         hso_dev->is_active = 1;
3060                         schedule_work(&hso_dev->async_get_intf);
3061                 }
3062         }
3063
3064         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3065                 return -EAGAIN;
3066
3067         usb_mark_last_busy(hso_dev->usb);
3068
3069         return 0;
3070 }
3071
3072 static int hso_put_activity(struct hso_device *hso_dev)
3073 {
3074         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3075                 if (hso_dev->is_active) {
3076                         hso_dev->is_active = 0;
3077                         schedule_work(&hso_dev->async_put_intf);
3078                         return -EAGAIN;
3079                 }
3080         }
3081         hso_dev->is_active = 0;
3082         return 0;
3083 }
3084
3085 /* called by kernel when we need to suspend device */
3086 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3087 {
3088         int i, result;
3089
3090         /* Stop all serial ports */
3091         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3092                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3093                         result = hso_stop_serial_device(serial_table[i]);
3094                         if (result)
3095                                 goto out;
3096                 }
3097         }
3098
3099         /* Stop all network ports */
3100         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3101                 if (network_table[i] &&
3102                     (network_table[i]->interface == iface)) {
3103                         result = hso_stop_net_device(network_table[i]);
3104                         if (result)
3105                                 goto out;
3106                 }
3107         }
3108
3109 out:
3110         return 0;
3111 }
3112
3113 /* called by kernel when we need to resume device */
3114 static int hso_resume(struct usb_interface *iface)
3115 {
3116         int i, result = 0;
3117         struct hso_net *hso_net;
3118
3119         /* Start all serial ports */
3120         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3121                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3122                         if (dev2ser(serial_table[i])->open_count) {
3123                                 result =
3124                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3125                                 hso_kick_transmit(dev2ser(serial_table[i]));
3126                                 if (result)
3127                                         goto out;
3128                         }
3129                 }
3130         }
3131
3132         /* Start all network ports */
3133         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3134                 if (network_table[i] &&
3135                     (network_table[i]->interface == iface)) {
3136                         hso_net = dev2net(network_table[i]);
3137                         if (hso_net->flags & IFF_UP) {
3138                                 /* First transmit any lingering data,
3139                                    then restart the device. */
3140                                 if (hso_net->skb_tx_buf) {
3141                                         dev_dbg(&iface->dev,
3142                                                 "Transmitting"
3143                                                 " lingering data\n");
3144                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3145                                                            hso_net->net);
3146                                         hso_net->skb_tx_buf = NULL;
3147                                 }
3148                                 result = hso_start_net_device(network_table[i]);
3149                                 if (result)
3150                                         goto out;
3151                         }
3152                 }
3153         }
3154
3155 out:
3156         return result;
3157 }
3158
3159 static void reset_device(struct work_struct *data)
3160 {
3161         struct hso_device *hso_dev =
3162             container_of(data, struct hso_device, reset_device);
3163         struct usb_device *usb = hso_dev->usb;
3164         int result;
3165
3166         if (hso_dev->usb_gone) {
3167                 D1("No reset during disconnect\n");
3168         } else {
3169                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3170                 if (result < 0)
3171                         D1("unable to lock device for reset: %d\n", result);
3172                 else {
3173                         usb_reset_device(usb);
3174                         usb_unlock_device(usb);
3175                 }
3176         }
3177 }
3178
3179 static void hso_serial_ref_free(struct kref *ref)
3180 {
3181         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3182
3183         hso_free_serial_device(hso_dev);
3184 }
3185
3186 static void hso_free_interface(struct usb_interface *interface)
3187 {
3188         struct hso_serial *hso_dev;
3189         struct tty_struct *tty;
3190         int i;
3191
3192         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3193                 if (serial_table[i] &&
3194                     (serial_table[i]->interface == interface)) {
3195                         hso_dev = dev2ser(serial_table[i]);
3196                         spin_lock_irq(&hso_dev->serial_lock);
3197                         tty = tty_kref_get(hso_dev->tty);
3198                         spin_unlock_irq(&hso_dev->serial_lock);
3199                         if (tty)
3200                                 tty_hangup(tty);
3201                         mutex_lock(&hso_dev->parent->mutex);
3202                         tty_kref_put(tty);
3203                         hso_dev->parent->usb_gone = 1;
3204                         mutex_unlock(&hso_dev->parent->mutex);
3205                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3206                 }
3207         }
3208
3209         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3210                 if (network_table[i] &&
3211                     (network_table[i]->interface == interface)) {
3212                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3213                         /* hso_stop_net_device doesn't stop the net queue since
3214                          * traffic needs to start it again when suspended */
3215                         netif_stop_queue(dev2net(network_table[i])->net);
3216                         hso_stop_net_device(network_table[i]);
3217                         cancel_work_sync(&network_table[i]->async_put_intf);
3218                         cancel_work_sync(&network_table[i]->async_get_intf);
3219                         if (rfk) {
3220                                 rfkill_unregister(rfk);
3221                                 rfkill_destroy(rfk);
3222                         }
3223                         hso_free_net_device(network_table[i]);
3224                 }
3225         }
3226 }
3227
3228 /* Helper functions */
3229
3230 /* Get the endpoint ! */
3231 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3232                                                   int type, int dir)
3233 {
3234         int i;
3235         struct usb_host_interface *iface = intf->cur_altsetting;
3236         struct usb_endpoint_descriptor *endp;
3237
3238         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3239                 endp = &iface->endpoint[i].desc;
3240                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3241                     (usb_endpoint_type(endp) == type))
3242                         return endp;
3243         }
3244
3245         return NULL;
3246 }
3247
3248 /* Get the byte that describes which ports are enabled */
3249 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3250 {
3251         int i;
3252         struct usb_host_interface *iface = intf->cur_altsetting;
3253
3254         if (iface->extralen == 3) {
3255                 *ports = iface->extra[2];
3256                 return 0;
3257         }
3258
3259         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3260                 if (iface->endpoint[i].extralen == 3) {
3261                         *ports = iface->endpoint[i].extra[2];
3262                         return 0;
3263                 }
3264         }
3265
3266         return -1;
3267 }
3268
3269 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3270 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3271                                    struct usb_device *usb, gfp_t gfp)
3272 {
3273         int result;
3274
3275         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3276                          usb_rcvintpipe(usb,
3277                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3278                          shared_int->shared_intr_buf,
3279                          1,
3280                          intr_callback, shared_int,
3281                          shared_int->intr_endp->bInterval);
3282
3283         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3284         if (result)
3285                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3286                         result);
3287
3288         return result;
3289 }
3290
3291 /* operations setup of the serial interface */
3292 static const struct tty_operations hso_serial_ops = {
3293         .open = hso_serial_open,
3294         .close = hso_serial_close,
3295         .write = hso_serial_write,
3296         .write_room = hso_serial_write_room,
3297         .ioctl = hso_serial_ioctl,
3298         .set_termios = hso_serial_set_termios,
3299         .chars_in_buffer = hso_serial_chars_in_buffer,
3300         .tiocmget = hso_serial_tiocmget,
3301         .tiocmset = hso_serial_tiocmset,
3302         .unthrottle = hso_unthrottle
3303 };
3304
3305 static struct usb_driver hso_driver = {
3306         .name = driver_name,
3307         .probe = hso_probe,
3308         .disconnect = hso_disconnect,
3309         .id_table = hso_ids,
3310         .suspend = hso_suspend,
3311         .resume = hso_resume,
3312         .reset_resume = hso_resume,
3313         .supports_autosuspend = 1,
3314 };
3315
3316 static int __init hso_init(void)
3317 {
3318         int i;
3319         int result;
3320
3321         /* put it in the log */
3322         printk(KERN_INFO "hso: %s\n", version);
3323
3324         /* Initialise the serial table semaphore and table */
3325         spin_lock_init(&serial_table_lock);
3326         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3327                 serial_table[i] = NULL;
3328
3329         /* allocate our driver using the proper amount of supported minors */
3330         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3331         if (!tty_drv)
3332                 return -ENOMEM;
3333
3334         /* fill in all needed values */
3335         tty_drv->magic = TTY_DRIVER_MAGIC;
3336         tty_drv->owner = THIS_MODULE;
3337         tty_drv->driver_name = driver_name;
3338         tty_drv->name = tty_filename;
3339
3340         /* if major number is provided as parameter, use that one */
3341         if (tty_major)
3342                 tty_drv->major = tty_major;
3343
3344         tty_drv->minor_start = 0;
3345         tty_drv->num = HSO_SERIAL_TTY_MINORS;
3346         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3347         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3348         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3349         tty_drv->init_termios = tty_std_termios;
3350         hso_init_termios(&tty_drv->init_termios);
3351         tty_set_operations(tty_drv, &hso_serial_ops);
3352
3353         /* register the tty driver */
3354         result = tty_register_driver(tty_drv);
3355         if (result) {
3356                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3357                         __func__, result);
3358                 return result;
3359         }
3360
3361         /* register this module as an usb driver */
3362         result = usb_register(&hso_driver);
3363         if (result) {
3364                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3365                         result);
3366                 /* cleanup serial interface */
3367                 tty_unregister_driver(tty_drv);
3368                 return result;
3369         }
3370
3371         /* done */
3372         return 0;
3373 }
3374
3375 static void __exit hso_exit(void)
3376 {
3377         printk(KERN_INFO "hso: unloaded\n");
3378
3379         tty_unregister_driver(tty_drv);
3380         /* deregister the usb driver */
3381         usb_deregister(&hso_driver);
3382 }
3383
3384 /* Module definitions */
3385 module_init(hso_init);
3386 module_exit(hso_exit);
3387
3388 MODULE_AUTHOR(MOD_AUTHOR);
3389 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3390 MODULE_LICENSE(MOD_LICENSE);
3391 MODULE_INFO(Version, DRIVER_VERSION);
3392
3393 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3394 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3395 module_param(debug, int, S_IRUGO | S_IWUSR);
3396
3397 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3398 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3399 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3400
3401 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3402 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3403 module_param(disable_net, int, S_IRUGO | S_IWUSR);