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 MOD_AUTHOR                      "Option Wireless"
  77 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  78 #define MOD_LICENSE                     "GPL"
  79
  80 #define HSO_MAX_NET_DEVICES             10
  81 #define HSO__MAX_MTU                    2048
  82 #define DEFAULT_MTU                     1500
  83 #define DEFAULT_MRU                     1500
  84
  85 #define CTRL_URB_RX_SIZE                1024
  86 #define CTRL_URB_TX_SIZE                64
  87
  88 #define BULK_URB_RX_SIZE                4096
  89 #define BULK_URB_TX_SIZE                8192
  90
  91 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  92 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  93 #define MUX_BULK_RX_BUF_COUNT           4
  94 #define USB_TYPE_OPTION_VENDOR          0x20
  95
  96 /* These definitions are used with the struct hso_net flags element */
  97 /* - use *_bit operations on it. (bit indices not values.) */
  98 #define HSO_NET_RUNNING                 0
  99
 100 #define HSO_NET_TX_TIMEOUT              (HZ*10)
 101
 102 #define HSO_SERIAL_MAGIC                0x48534f31
 103
 104 /* Number of ttys to handle */
 105 #define HSO_SERIAL_TTY_MINORS           256
 106
 107 #define MAX_RX_URBS                     2
 108
 109 /*****************************************************************************/
 110 /* Debugging functions                                                       */
 111 /*****************************************************************************/
 112 #define D__(lvl_, fmt, arg...)                          \
 113         do {                                            \
 114                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 115                        __LINE__, __func__, ## arg);     \
 116         } while (0)
 117
 118 #define D_(lvl, args...)                                \
 119         do {                                            \
 120                 if (lvl & debug)                        \
 121                         D__(KERN_INFO, args);           \
 122         } while (0)
 123
 124 #define D1(args...)     D_(0x01, ##args)
 125 #define D2(args...)     D_(0x02, ##args)
 126 #define D3(args...)     D_(0x04, ##args)
 127 #define D4(args...)     D_(0x08, ##args)
 128 #define D5(args...)     D_(0x10, ##args)
 129
 130 /*****************************************************************************/
 131 /* Enumerators                                                               */
 132 /*****************************************************************************/
 133 enum pkt_parse_state {
 134         WAIT_IP,
 135         WAIT_DATA,
 136         WAIT_SYNC
 137 };
 138
 139 /*****************************************************************************/
 140 /* Structs                                                                   */
 141 /*****************************************************************************/
 142
 143 struct hso_shared_int {
 144         struct usb_endpoint_descriptor *intr_endp;
 145         void *shared_intr_buf;
 146         struct urb *shared_intr_urb;
 147         struct usb_device *usb;
 148         int use_count;
 149         int ref_count;
 150         struct mutex shared_int_lock;
 151 };
 152
 153 struct hso_net {
 154         struct hso_device *parent;
 155         struct net_device *net;
 156         struct rfkill *rfkill;
 157
 158         struct usb_endpoint_descriptor *in_endp;
 159         struct usb_endpoint_descriptor *out_endp;
 160
 161         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 162         struct urb *mux_bulk_tx_urb;
 163         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 164         void *mux_bulk_tx_buf;
 165
 166         struct sk_buff *skb_rx_buf;
 167         struct sk_buff *skb_tx_buf;
 168
 169         enum pkt_parse_state rx_parse_state;
 170         spinlock_t net_lock;
 171
 172         unsigned short rx_buf_size;
 173         unsigned short rx_buf_missing;
 174         struct iphdr rx_ip_hdr;
 175
 176         unsigned long flags;
 177 };
 178
 179 enum rx_ctrl_state{
 180         RX_IDLE,
 181         RX_SENT,
 182         RX_PENDING
 183 };
 184
 185 #define BM_REQUEST_TYPE (0xa1)
 186 #define B_NOTIFICATION  (0x20)
 187 #define W_VALUE         (0x0)
 188 #define W_LENGTH        (0x2)
 189
 190 #define B_OVERRUN       (0x1<<6)
 191 #define B_PARITY        (0x1<<5)
 192 #define B_FRAMING       (0x1<<4)
 193 #define B_RING_SIGNAL   (0x1<<3)
 194 #define B_BREAK         (0x1<<2)
 195 #define B_TX_CARRIER    (0x1<<1)
 196 #define B_RX_CARRIER    (0x1<<0)
 197
 198 struct hso_serial_state_notification {
 199         u8 bmRequestType;
 200         u8 bNotification;
 201         u16 wValue;
 202         u16 wIndex;
 203         u16 wLength;
 204         u16 UART_state_bitmap;
 205 } __packed;
 206
 207 struct hso_tiocmget {
 208         struct mutex mutex;
 209         wait_queue_head_t waitq;
 210         int    intr_completed;
 211         struct usb_endpoint_descriptor *endp;
 212         struct urb *urb;
 213         struct hso_serial_state_notification serial_state_notification;
 214         u16    prev_UART_state_bitmap;
 215         struct uart_icount icount;
 216 };
 217
 218
 219 struct hso_serial {
 220         struct hso_device *parent;
 221         int magic;
 222         u8 minor;
 223
 224         struct hso_shared_int *shared_int;
 225
 226         /* rx/tx urb could be either a bulk urb or a control urb depending
 227            on which serial port it is used on. */
 228         struct urb *rx_urb[MAX_RX_URBS];
 229         u8 num_rx_urbs;
 230         u8 *rx_data[MAX_RX_URBS];
 231         u16 rx_data_length;     /* should contain allocated length */
 232
 233         struct urb *tx_urb;
 234         u8 *tx_data;
 235         u8 *tx_buffer;
 236         u16 tx_data_length;     /* should contain allocated length */
 237         u16 tx_data_count;
 238         u16 tx_buffer_count;
 239         struct usb_ctrlrequest ctrl_req_tx;
 240         struct usb_ctrlrequest ctrl_req_rx;
 241
 242         struct usb_endpoint_descriptor *in_endp;
 243         struct usb_endpoint_descriptor *out_endp;
 244
 245         enum rx_ctrl_state rx_state;
 246         u8 rts_state;
 247         u8 dtr_state;
 248         unsigned tx_urb_used:1;
 249
 250         struct tty_port port;
 251         /* from usb_serial_port */
 252         spinlock_t serial_lock;
 253
 254         int (*write_data) (struct hso_serial *serial);
 255         struct hso_tiocmget  *tiocmget;
 256         /* Hacks required to get flow control
 257          * working on the serial receive buffers
 258          * so as not to drop characters on the floor.
 259          */
 260         int  curr_rx_urb_idx;
 261         u16  curr_rx_urb_offset;
 262         u8   rx_urb_filled[MAX_RX_URBS];
 263         struct tasklet_struct unthrottle_tasklet;
 264         struct work_struct    retry_unthrottle_workqueue;
 265 };
 266
 267 struct hso_device {
 268         union {
 269                 struct hso_serial *dev_serial;
 270                 struct hso_net *dev_net;
 271         } port_data;
 272
 273         u32 port_spec;
 274
 275         u8 is_active;
 276         u8 usb_gone;
 277         struct work_struct async_get_intf;
 278         struct work_struct async_put_intf;
 279         struct work_struct reset_device;
 280
 281         struct usb_device *usb;
 282         struct usb_interface *interface;
 283
 284         struct device *dev;
 285         struct kref ref;
 286         struct mutex mutex;
 287 };
 288
 289 /* Type of interface */
 290 #define HSO_INTF_MASK           0xFF00
 291 #define HSO_INTF_MUX            0x0100
 292 #define HSO_INTF_BULK           0x0200
 293
 294 /* Type of port */
 295 #define HSO_PORT_MASK           0xFF
 296 #define HSO_PORT_NO_PORT        0x0
 297 #define HSO_PORT_CONTROL        0x1
 298 #define HSO_PORT_APP            0x2
 299 #define HSO_PORT_GPS            0x3
 300 #define HSO_PORT_PCSC           0x4
 301 #define HSO_PORT_APP2           0x5
 302 #define HSO_PORT_GPS_CONTROL    0x6
 303 #define HSO_PORT_MSD            0x7
 304 #define HSO_PORT_VOICE          0x8
 305 #define HSO_PORT_DIAG2          0x9
 306 #define HSO_PORT_DIAG           0x10
 307 #define HSO_PORT_MODEM          0x11
 308 #define HSO_PORT_NETWORK        0x12
 309
 310 /* Additional device info */
 311 #define HSO_INFO_MASK           0xFF000000
 312 #define HSO_INFO_CRC_BUG        0x01000000
 313
 314 /*****************************************************************************/
 315 /* Prototypes                                                                */
 316 /*****************************************************************************/
 317 /* Serial driver functions */
 318 static int hso_serial_tiocmset(struct tty_struct *tty,
 319                                unsigned int set, unsigned int clear);
 320 static void ctrl_callback(struct urb *urb);
 321 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 322 static void hso_kick_transmit(struct hso_serial *serial);
 323 /* Helper functions */
 324 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 325                                    struct usb_device *usb, gfp_t gfp);
 326 static void handle_usb_error(int status, const char *function,
 327                              struct hso_device *hso_dev);
 328 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 329                                                   int type, int dir);
 330 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 331 static void hso_free_interface(struct usb_interface *intf);
 332 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 333 static int hso_stop_serial_device(struct hso_device *hso_dev);
 334 static int hso_start_net_device(struct hso_device *hso_dev);
 335 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 336 static int hso_stop_net_device(struct hso_device *hso_dev);
 337 static void hso_serial_ref_free(struct kref *ref);
 338 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 339 static int hso_mux_serial_read(struct hso_serial *serial);
 340 static void async_get_intf(struct work_struct *data);
 341 static void async_put_intf(struct work_struct *data);
 342 static int hso_put_activity(struct hso_device *hso_dev);
 343 static int hso_get_activity(struct hso_device *hso_dev);
 344 static void tiocmget_intr_callback(struct urb *urb);
 345 static void reset_device(struct work_struct *data);
 346 /*****************************************************************************/
 347 /* Helping functions                                                         */
 348 /*****************************************************************************/
 349
 350 /* #define DEBUG */
 351
 352 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 353 {
 354         return hso_dev->port_data.dev_net;
 355 }
 356
 357 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 358 {
 359         return hso_dev->port_data.dev_serial;
 360 }
 361
 362 /* Debugging functions */
 363 #ifdef DEBUG
 364 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 365                      unsigned int len)
 366 {
 367         static char name[255];
 368
 369         sprintf(name, "hso[%d:%s]", line_count, func_name);
 370         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 371 }
 372
 373 #define DUMP(buf_, len_)        \
 374         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 375
 376 #define DUMP1(buf_, len_)                       \
 377         do {                                    \
 378                 if (0x01 & debug)               \
 379                         DUMP(buf_, len_);       \
 380         } while (0)
 381 #else
 382 #define DUMP(buf_, len_)
 383 #define DUMP1(buf_, len_)
 384 #endif
 385
 386 /* module parameters */
 387 static int debug;
 388 static int tty_major;
 389 static int disable_net;
 390
 391 /* driver info */
 392 static const char driver_name[] = "hso";
 393 static const char tty_filename[] = "ttyHS";
 394 static const char *version = __FILE__ ": " MOD_AUTHOR;
 395 /* the usb driver itself (registered in hso_init) */
 396 static struct usb_driver hso_driver;
 397 /* serial structures */
 398 static struct tty_driver *tty_drv;
 399 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 400 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 401 static spinlock_t serial_table_lock;
 402
 403 static const s32 default_port_spec[] = {
 404         HSO_INTF_MUX | HSO_PORT_NETWORK,
 405         HSO_INTF_BULK | HSO_PORT_DIAG,
 406         HSO_INTF_BULK | HSO_PORT_MODEM,
 407         0
 408 };
 409
 410 static const s32 icon321_port_spec[] = {
 411         HSO_INTF_MUX | HSO_PORT_NETWORK,
 412         HSO_INTF_BULK | HSO_PORT_DIAG2,
 413         HSO_INTF_BULK | HSO_PORT_MODEM,
 414         HSO_INTF_BULK | HSO_PORT_DIAG,
 415         0
 416 };
 417
 418 #define default_port_device(vendor, product)    \
 419         USB_DEVICE(vendor, product),    \
 420                 .driver_info = (kernel_ulong_t)default_port_spec
 421
 422 #define icon321_port_device(vendor, product)    \
 423         USB_DEVICE(vendor, product),    \
 424                 .driver_info = (kernel_ulong_t)icon321_port_spec
 425
 426 /* list of devices we support */
 427 static const struct usb_device_id hso_ids[] = {
 428         {default_port_device(0x0af0, 0x6711)},
 429         {default_port_device(0x0af0, 0x6731)},
 430         {default_port_device(0x0af0, 0x6751)},
 431         {default_port_device(0x0af0, 0x6771)},
 432         {default_port_device(0x0af0, 0x6791)},
 433         {default_port_device(0x0af0, 0x6811)},
 434         {default_port_device(0x0af0, 0x6911)},
 435         {default_port_device(0x0af0, 0x6951)},
 436         {default_port_device(0x0af0, 0x6971)},
 437         {default_port_device(0x0af0, 0x7011)},
 438         {default_port_device(0x0af0, 0x7031)},
 439         {default_port_device(0x0af0, 0x7051)},
 440         {default_port_device(0x0af0, 0x7071)},
 441         {default_port_device(0x0af0, 0x7111)},
 442         {default_port_device(0x0af0, 0x7211)},
 443         {default_port_device(0x0af0, 0x7251)},
 444         {default_port_device(0x0af0, 0x7271)},
 445         {default_port_device(0x0af0, 0x7311)},
 446         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 447         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 448         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 449         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 450         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 451         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 452         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 453         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 454         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 455         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 456         {USB_DEVICE(0x0af0, 0x7701)},
 457         {USB_DEVICE(0x0af0, 0x7706)},
 458         {USB_DEVICE(0x0af0, 0x7801)},
 459         {USB_DEVICE(0x0af0, 0x7901)},
 460         {USB_DEVICE(0x0af0, 0x7A01)},
 461         {USB_DEVICE(0x0af0, 0x7A05)},
 462         {USB_DEVICE(0x0af0, 0x8200)},
 463         {USB_DEVICE(0x0af0, 0x8201)},
 464         {USB_DEVICE(0x0af0, 0x8300)},
 465         {USB_DEVICE(0x0af0, 0x8302)},
 466         {USB_DEVICE(0x0af0, 0x8304)},
 467         {USB_DEVICE(0x0af0, 0x8400)},
 468         {USB_DEVICE(0x0af0, 0x8600)},
 469         {USB_DEVICE(0x0af0, 0x8800)},
 470         {USB_DEVICE(0x0af0, 0x8900)},
 471         {USB_DEVICE(0x0af0, 0x9000)},
 472         {USB_DEVICE(0x0af0, 0xd035)},
 473         {USB_DEVICE(0x0af0, 0xd055)},
 474         {USB_DEVICE(0x0af0, 0xd155)},
 475         {USB_DEVICE(0x0af0, 0xd255)},
 476         {USB_DEVICE(0x0af0, 0xd057)},
 477         {USB_DEVICE(0x0af0, 0xd157)},
 478         {USB_DEVICE(0x0af0, 0xd257)},
 479         {USB_DEVICE(0x0af0, 0xd357)},
 480         {USB_DEVICE(0x0af0, 0xd058)},
 481         {USB_DEVICE(0x0af0, 0xc100)},
 482         {}
 483 };
 484 MODULE_DEVICE_TABLE(usb, hso_ids);
 485
 486 /* Sysfs attribute */
 487 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 488                                        struct device_attribute *attr,
 489                                        char *buf)
 490 {
 491         struct hso_device *hso_dev = dev_get_drvdata(dev);
 492         char *port_name;
 493
 494         if (!hso_dev)
 495                 return 0;
 496
 497         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 498         case HSO_PORT_CONTROL:
 499                 port_name = "Control";
 500                 break;
 501         case HSO_PORT_APP:
 502                 port_name = "Application";
 503                 break;
 504         case HSO_PORT_APP2:
 505                 port_name = "Application2";
 506                 break;
 507         case HSO_PORT_GPS:
 508                 port_name = "GPS";
 509                 break;
 510         case HSO_PORT_GPS_CONTROL:
 511                 port_name = "GPS Control";
 512                 break;
 513         case HSO_PORT_PCSC:
 514                 port_name = "PCSC";
 515                 break;
 516         case HSO_PORT_DIAG:
 517                 port_name = "Diagnostic";
 518                 break;
 519         case HSO_PORT_DIAG2:
 520                 port_name = "Diagnostic2";
 521                 break;
 522         case HSO_PORT_MODEM:
 523                 port_name = "Modem";
 524                 break;
 525         case HSO_PORT_NETWORK:
 526                 port_name = "Network";
 527                 break;
 528         default:
 529                 port_name = "Unknown";
 530                 break;
 531         }
 532
 533         return sprintf(buf, "%s\n", port_name);
 534 }
 535 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 536
 537 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 538 {
 539         int idx;
 540
 541         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 542                 if (serial->rx_urb[idx] == urb)
 543                         return idx;
 544         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 545         return -1;
 546 }
 547
 548 /* converts mux value to a port spec value */
 549 static u32 hso_mux_to_port(int mux)
 550 {
 551         u32 result;
 552
 553         switch (mux) {
 554         case 0x1:
 555                 result = HSO_PORT_CONTROL;
 556                 break;
 557         case 0x2:
 558                 result = HSO_PORT_APP;
 559                 break;
 560         case 0x4:
 561                 result = HSO_PORT_PCSC;
 562                 break;
 563         case 0x8:
 564                 result = HSO_PORT_GPS;
 565                 break;
 566         case 0x10:
 567                 result = HSO_PORT_APP2;
 568                 break;
 569         default:
 570                 result = HSO_PORT_NO_PORT;
 571         }
 572         return result;
 573 }
 574
 575 /* converts port spec value to a mux value */
 576 static u32 hso_port_to_mux(int port)
 577 {
 578         u32 result;
 579
 580         switch (port & HSO_PORT_MASK) {
 581         case HSO_PORT_CONTROL:
 582                 result = 0x0;
 583                 break;
 584         case HSO_PORT_APP:
 585                 result = 0x1;
 586                 break;
 587         case HSO_PORT_PCSC:
 588                 result = 0x2;
 589                 break;
 590         case HSO_PORT_GPS:
 591                 result = 0x3;
 592                 break;
 593         case HSO_PORT_APP2:
 594                 result = 0x4;
 595                 break;
 596         default:
 597                 result = 0x0;
 598         }
 599         return result;
 600 }
 601
 602 static struct hso_serial *get_serial_by_shared_int_and_type(
 603                                         struct hso_shared_int *shared_int,
 604                                         int mux)
 605 {
 606         int i, port;
 607
 608         port = hso_mux_to_port(mux);
 609
 610         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 611                 if (serial_table[i] &&
 612                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 613                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 614                         return dev2ser(serial_table[i]);
 615                 }
 616         }
 617
 618         return NULL;
 619 }
 620
 621 static struct hso_serial *get_serial_by_index(unsigned index)
 622 {
 623         struct hso_serial *serial = NULL;
 624         unsigned long flags;
 625
 626         spin_lock_irqsave(&serial_table_lock, flags);
 627         if (serial_table[index])
 628                 serial = dev2ser(serial_table[index]);
 629         spin_unlock_irqrestore(&serial_table_lock, flags);
 630
 631         return serial;
 632 }
 633
 634 static int get_free_serial_index(void)
 635 {
 636         int index;
 637         unsigned long flags;
 638
 639         spin_lock_irqsave(&serial_table_lock, flags);
 640         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 641                 if (serial_table[index] == NULL) {
 642                         spin_unlock_irqrestore(&serial_table_lock, flags);
 643                         return index;
 644                 }
 645         }
 646         spin_unlock_irqrestore(&serial_table_lock, flags);
 647
 648         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 649         return -1;
 650 }
 651
 652 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 653 {
 654         unsigned long flags;
 655
 656         spin_lock_irqsave(&serial_table_lock, flags);
 657         if (serial)
 658                 serial_table[index] = serial->parent;
 659         else
 660                 serial_table[index] = NULL;
 661         spin_unlock_irqrestore(&serial_table_lock, flags);
 662 }
 663
 664 static void handle_usb_error(int status, const char *function,
 665                              struct hso_device *hso_dev)
 666 {
 667         char *explanation;
 668
 669         switch (status) {
 670         case -ENODEV:
 671                 explanation = "no device";
 672                 break;
 673         case -ENOENT:
 674                 explanation = "endpoint not enabled";
 675                 break;
 676         case -EPIPE:
 677                 explanation = "endpoint stalled";
 678                 break;
 679         case -ENOSPC:
 680                 explanation = "not enough bandwidth";
 681                 break;
 682         case -ESHUTDOWN:
 683                 explanation = "device disabled";
 684                 break;
 685         case -EHOSTUNREACH:
 686                 explanation = "device suspended";
 687                 break;
 688         case -EINVAL:
 689         case -EAGAIN:
 690         case -EFBIG:
 691         case -EMSGSIZE:
 692                 explanation = "internal error";
 693                 break;
 694         case -EILSEQ:
 695         case -EPROTO:
 696         case -ETIME:
 697         case -ETIMEDOUT:
 698                 explanation = "protocol error";
 699                 if (hso_dev)
 700                         schedule_work(&hso_dev->reset_device);
 701                 break;
 702         default:
 703                 explanation = "unknown status";
 704                 break;
 705         }
 706
 707         /* log a meaningful explanation of an USB status */
 708         D1("%s: received USB status - %s (%d)", function, explanation, status);
 709 }
 710
 711 /* Network interface functions */
 712
 713 /* called when net interface is brought up by ifconfig */
 714 static int hso_net_open(struct net_device *net)
 715 {
 716         struct hso_net *odev = netdev_priv(net);
 717         unsigned long flags = 0;
 718
 719         if (!odev) {
 720                 dev_err(&net->dev, "No net device !\n");
 721                 return -ENODEV;
 722         }
 723
 724         odev->skb_tx_buf = NULL;
 725
 726         /* setup environment */
 727         spin_lock_irqsave(&odev->net_lock, flags);
 728         odev->rx_parse_state = WAIT_IP;
 729         odev->rx_buf_size = 0;
 730         odev->rx_buf_missing = sizeof(struct iphdr);
 731         spin_unlock_irqrestore(&odev->net_lock, flags);
 732
 733         /* We are up and running. */
 734         set_bit(HSO_NET_RUNNING, &odev->flags);
 735         hso_start_net_device(odev->parent);
 736
 737         /* Tell the kernel we are ready to start receiving from it */
 738         netif_start_queue(net);
 739
 740         return 0;
 741 }
 742
 743 /* called when interface is brought down by ifconfig */
 744 static int hso_net_close(struct net_device *net)
 745 {
 746         struct hso_net *odev = netdev_priv(net);
 747
 748         /* we don't need the queue anymore */
 749         netif_stop_queue(net);
 750         /* no longer running */
 751         clear_bit(HSO_NET_RUNNING, &odev->flags);
 752
 753         hso_stop_net_device(odev->parent);
 754
 755         /* done */
 756         return 0;
 757 }
 758
 759 /* USB tells is xmit done, we should start the netqueue again */
 760 static void write_bulk_callback(struct urb *urb)
 761 {
 762         struct hso_net *odev = urb->context;
 763         int status = urb->status;
 764
 765         /* Sanity check */
 766         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 767                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 768                 return;
 769         }
 770
 771         /* Do we still have a valid kernel network device? */
 772         if (!netif_device_present(odev->net)) {
 773                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 774                         __func__);
 775                 return;
 776         }
 777
 778         /* log status, but don't act on it, we don't need to resubmit anything
 779          * anyhow */
 780         if (status)
 781                 handle_usb_error(status, __func__, odev->parent);
 782
 783         hso_put_activity(odev->parent);
 784
 785         /* Tell the network interface we are ready for another frame */
 786         netif_wake_queue(odev->net);
 787 }
 788
 789 /* called by kernel when we need to transmit a packet */
 790 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 791                                             struct net_device *net)
 792 {
 793         struct hso_net *odev = netdev_priv(net);
 794         int result;
 795
 796         /* Tell the kernel, "No more frames 'til we are done with this one." */
 797         netif_stop_queue(net);
 798         if (hso_get_activity(odev->parent) == -EAGAIN) {
 799                 odev->skb_tx_buf = skb;
 800                 return NETDEV_TX_OK;
 801         }
 802
 803         /* log if asked */
 804         DUMP1(skb->data, skb->len);
 805         /* Copy it from kernel memory to OUR memory */
 806         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 807         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 808
 809         /* Fill in the URB for shipping it out. */
 810         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 811                           odev->parent->usb,
 812                           usb_sndbulkpipe(odev->parent->usb,
 813                                           odev->out_endp->
 814                                           bEndpointAddress & 0x7F),
 815                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 816                           odev);
 817
 818         /* Deal with the Zero Length packet problem, I hope */
 819         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 820
 821         /* Send the URB on its merry way. */
 822         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 823         if (result) {
 824                 dev_warn(&odev->parent->interface->dev,
 825                         "failed mux_bulk_tx_urb %d\n", result);
 826                 net->stats.tx_errors++;
 827                 netif_start_queue(net);
 828         } else {
 829                 net->stats.tx_packets++;
 830                 net->stats.tx_bytes += skb->len;
 831         }
 832         dev_kfree_skb(skb);
 833         /* we're done */
 834         return NETDEV_TX_OK;
 835 }
 836
 837 static const struct ethtool_ops ops = {
 838         .get_link = ethtool_op_get_link
 839 };
 840
 841 /* called when a packet did not ack after watchdogtimeout */
 842 static void hso_net_tx_timeout(struct net_device *net)
 843 {
 844         struct hso_net *odev = netdev_priv(net);
 845
 846         if (!odev)
 847                 return;
 848
 849         /* Tell syslog we are hosed. */
 850         dev_warn(&net->dev, "Tx timed out.\n");
 851
 852         /* Tear the waiting frame off the list */
 853         if (odev->mux_bulk_tx_urb &&
 854             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 855                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 856
 857         /* Update statistics */
 858         net->stats.tx_errors++;
 859 }
 860
 861 /* make a real packet from the received USB buffer */
 862 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 863                         unsigned int count, unsigned char is_eop)
 864 {
 865         unsigned short temp_bytes;
 866         unsigned short buffer_offset = 0;
 867         unsigned short frame_len;
 868         unsigned char *tmp_rx_buf;
 869
 870         /* log if needed */
 871         D1("Rx %d bytes", count);
 872         DUMP(ip_pkt, min(128, (int)count));
 873
 874         while (count) {
 875                 switch (odev->rx_parse_state) {
 876                 case WAIT_IP:
 877                         /* waiting for IP header. */
 878                         /* wanted bytes - size of ip header */
 879                         temp_bytes =
 880                             (count <
 881                              odev->rx_buf_missing) ? count : odev->
 882                             rx_buf_missing;
 883
 884                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 885                                odev->rx_buf_size, ip_pkt + buffer_offset,
 886                                temp_bytes);
 887
 888                         odev->rx_buf_size += temp_bytes;
 889                         buffer_offset += temp_bytes;
 890                         odev->rx_buf_missing -= temp_bytes;
 891                         count -= temp_bytes;
 892
 893                         if (!odev->rx_buf_missing) {
 894                                 /* header is complete allocate an sk_buffer and
 895                                  * continue to WAIT_DATA */
 896                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 897
 898                                 if ((frame_len > DEFAULT_MRU) ||
 899                                     (frame_len < sizeof(struct iphdr))) {
 900                                         dev_err(&odev->net->dev,
 901                                                 "Invalid frame (%d) length\n",
 902                                                 frame_len);
 903                                         odev->rx_parse_state = WAIT_SYNC;
 904                                         continue;
 905                                 }
 906                                 /* Allocate an sk_buff */
 907                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 908                                                                     frame_len);
 909                                 if (!odev->skb_rx_buf) {
 910                                         /* We got no receive buffer. */
 911                                         D1("could not allocate memory");
 912                                         odev->rx_parse_state = WAIT_SYNC;
 913                                         return;
 914                                 }
 915
 916                                 /* Copy what we got so far. make room for iphdr
 917                                  * after tail. */
 918                                 tmp_rx_buf =
 919                                     skb_put(odev->skb_rx_buf,
 920                                             sizeof(struct iphdr));
 921                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 922                                        sizeof(struct iphdr));
 923
 924                                 /* ETH_HLEN */
 925                                 odev->rx_buf_size = sizeof(struct iphdr);
 926
 927                                 /* Filip actually use .tot_len */
 928                                 odev->rx_buf_missing =
 929                                     frame_len - sizeof(struct iphdr);
 930                                 odev->rx_parse_state = WAIT_DATA;
 931                         }
 932                         break;
 933
 934                 case WAIT_DATA:
 935                         temp_bytes = (count < odev->rx_buf_missing)
 936                                         ? count : odev->rx_buf_missing;
 937
 938                         /* Copy the rest of the bytes that are left in the
 939                          * buffer into the waiting sk_buf. */
 940                         /* Make room for temp_bytes after tail. */
 941                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 942                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 943
 944                         odev->rx_buf_missing -= temp_bytes;
 945                         count -= temp_bytes;
 946                         buffer_offset += temp_bytes;
 947                         odev->rx_buf_size += temp_bytes;
 948                         if (!odev->rx_buf_missing) {
 949                                 /* Packet is complete. Inject into stack. */
 950                                 /* We have IP packet here */
 951                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 952                                 skb_reset_mac_header(odev->skb_rx_buf);
 953
 954                                 /* Ship it off to the kernel */
 955                                 netif_rx(odev->skb_rx_buf);
 956                                 /* No longer our buffer. */
 957                                 odev->skb_rx_buf = NULL;
 958
 959                                 /* update out statistics */
 960                                 odev->net->stats.rx_packets++;
 961
 962                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 963
 964                                 odev->rx_buf_size = 0;
 965                                 odev->rx_buf_missing = sizeof(struct iphdr);
 966                                 odev->rx_parse_state = WAIT_IP;
 967                         }
 968                         break;
 969
 970                 case WAIT_SYNC:
 971                         D1(" W_S");
 972                         count = 0;
 973                         break;
 974                 default:
 975                         D1(" ");
 976                         count--;
 977                         break;
 978                 }
 979         }
 980
 981         /* Recovery mechanism for WAIT_SYNC state. */
 982         if (is_eop) {
 983                 if (odev->rx_parse_state == WAIT_SYNC) {
 984                         odev->rx_parse_state = WAIT_IP;
 985                         odev->rx_buf_size = 0;
 986                         odev->rx_buf_missing = sizeof(struct iphdr);
 987                 }
 988         }
 989 }
 990
 991 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
 992 {
 993         static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
 994         u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
 995
 996         if (((rest == 5) || (rest == 6)) &&
 997             !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
 998                     crc_check, 4)) {
 999                 urb->actual_length -= 4;
1000         }
1001 }
1002
1003 /* Moving data from usb to kernel (in interrupt state) */
1004 static void read_bulk_callback(struct urb *urb)
1005 {
1006         struct hso_net *odev = urb->context;
1007         struct net_device *net;
1008         int result;
1009         int status = urb->status;
1010
1011         /* is al ok?  (Filip: Who's Al ?) */
1012         if (status) {
1013                 handle_usb_error(status, __func__, odev->parent);
1014                 return;
1015         }
1016
1017         /* Sanity check */
1018         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1019                 D1("BULK IN callback but driver is not active!");
1020                 return;
1021         }
1022         usb_mark_last_busy(urb->dev);
1023
1024         net = odev->net;
1025
1026         if (!netif_device_present(net)) {
1027                 /* Somebody killed our network interface... */
1028                 return;
1029         }
1030
1031         if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1032                 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1033
1034         /* do we even have a packet? */
1035         if (urb->actual_length) {
1036                 /* Handle the IP stream, add header and push it onto network
1037                  * stack if the packet is complete. */
1038                 spin_lock(&odev->net_lock);
1039                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1040                             (urb->transfer_buffer_length >
1041                              urb->actual_length) ? 1 : 0);
1042                 spin_unlock(&odev->net_lock);
1043         }
1044
1045         /* We are done with this URB, resubmit it. Prep the USB to wait for
1046          * another frame. Reuse same as received. */
1047         usb_fill_bulk_urb(urb,
1048                           odev->parent->usb,
1049                           usb_rcvbulkpipe(odev->parent->usb,
1050                                           odev->in_endp->
1051                                           bEndpointAddress & 0x7F),
1052                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1053                           read_bulk_callback, odev);
1054
1055         /* Give this to the USB subsystem so it can tell us when more data
1056          * arrives. */
1057         result = usb_submit_urb(urb, GFP_ATOMIC);
1058         if (result)
1059                 dev_warn(&odev->parent->interface->dev,
1060                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1061                          result);
1062 }
1063
1064 /* Serial driver functions */
1065
1066 static void hso_init_termios(struct ktermios *termios)
1067 {
1068         /*
1069          * The default requirements for this device are:
1070          */
1071         termios->c_iflag &=
1072                 ~(IGNBRK        /* disable ignore break */
1073                 | BRKINT        /* disable break causes interrupt */
1074                 | PARMRK        /* disable mark parity errors */
1075                 | ISTRIP        /* disable clear high bit of input characters */
1076                 | INLCR         /* disable translate NL to CR */
1077                 | IGNCR         /* disable ignore CR */
1078                 | ICRNL         /* disable translate CR to NL */
1079                 | IXON);        /* disable enable XON/XOFF flow control */
1080
1081         /* disable postprocess output characters */
1082         termios->c_oflag &= ~OPOST;
1083
1084         termios->c_lflag &=
1085                 ~(ECHO          /* disable echo input characters */
1086                 | ECHONL        /* disable echo new line */
1087                 | ICANON        /* disable erase, kill, werase, and rprnt
1088                                    special characters */
1089                 | ISIG          /* disable interrupt, quit, and suspend special
1090                                    characters */
1091                 | IEXTEN);      /* disable non-POSIX special characters */
1092
1093         termios->c_cflag &=
1094                 ~(CSIZE         /* no size */
1095                 | PARENB        /* disable parity bit */
1096                 | CBAUD         /* clear current baud rate */
1097                 | CBAUDEX);     /* clear current buad rate */
1098
1099         termios->c_cflag |= CS8;        /* character size 8 bits */
1100
1101         /* baud rate 115200 */
1102         tty_termios_encode_baud_rate(termios, 115200, 115200);
1103 }
1104
1105 static void _hso_serial_set_termios(struct tty_struct *tty,
1106                                     struct ktermios *old)
1107 {
1108         struct hso_serial *serial = tty->driver_data;
1109
1110         if (!serial) {
1111                 printk(KERN_ERR "%s: no tty structures", __func__);
1112                 return;
1113         }
1114
1115         D4("port %d", serial->minor);
1116
1117         /*
1118          *      Fix up unsupported bits
1119          */
1120         tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1121
1122         tty->termios.c_cflag &=
1123                 ~(CSIZE         /* no size */
1124                 | PARENB        /* disable parity bit */
1125                 | CBAUD         /* clear current baud rate */
1126                 | CBAUDEX);     /* clear current buad rate */
1127
1128         tty->termios.c_cflag |= CS8;    /* character size 8 bits */
1129
1130         /* baud rate 115200 */
1131         tty_encode_baud_rate(tty, 115200, 115200);
1132 }
1133
1134 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1135 {
1136         int result;
1137         /* We are done with this URB, resubmit it. Prep the USB to wait for
1138          * another frame */
1139         usb_fill_bulk_urb(urb, serial->parent->usb,
1140                           usb_rcvbulkpipe(serial->parent->usb,
1141                                           serial->in_endp->
1142                                           bEndpointAddress & 0x7F),
1143                           urb->transfer_buffer, serial->rx_data_length,
1144                           hso_std_serial_read_bulk_callback, serial);
1145         /* Give this to the USB subsystem so it can tell us when more data
1146          * arrives. */
1147         result = usb_submit_urb(urb, GFP_ATOMIC);
1148         if (result) {
1149                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1150                         __func__, result);
1151         }
1152 }
1153
1154
1155
1156
1157 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1158 {
1159         int count;
1160         struct urb *curr_urb;
1161
1162         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1163                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1164                 count = put_rxbuf_data(curr_urb, serial);
1165                 if (count == -1)
1166                         return;
1167                 if (count == 0) {
1168                         serial->curr_rx_urb_idx++;
1169                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1170                                 serial->curr_rx_urb_idx = 0;
1171                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1172                 }
1173         }
1174 }
1175
1176 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1177 {
1178         int count = 0;
1179         struct urb *urb;
1180
1181         urb = serial->rx_urb[0];
1182         if (serial->port.count > 0) {
1183                 count = put_rxbuf_data(urb, serial);
1184                 if (count == -1)
1185                         return;
1186         }
1187         /* Re issue a read as long as we receive data. */
1188
1189         if (count == 0 && ((urb->actual_length != 0) ||
1190                            (serial->rx_state == RX_PENDING))) {
1191                 serial->rx_state = RX_SENT;
1192                 hso_mux_serial_read(serial);
1193         } else
1194                 serial->rx_state = RX_IDLE;
1195 }
1196
1197
1198 /* read callback for Diag and CS port */
1199 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1200 {
1201         struct hso_serial *serial = urb->context;
1202         int status = urb->status;
1203
1204         /* sanity check */
1205         if (!serial) {
1206                 D1("serial == NULL");
1207                 return;
1208         } else if (status) {
1209                 handle_usb_error(status, __func__, serial->parent);
1210                 return;
1211         }
1212
1213         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1214         D1("Actual length = %d\n", urb->actual_length);
1215         DUMP1(urb->transfer_buffer, urb->actual_length);
1216
1217         /* Anyone listening? */
1218         if (serial->port.count == 0)
1219                 return;
1220
1221         if (status == 0) {
1222                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1223                         fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1224                 /* Valid data, handle RX data */
1225                 spin_lock(&serial->serial_lock);
1226                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1227                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1228                 spin_unlock(&serial->serial_lock);
1229         } else if (status == -ENOENT || status == -ECONNRESET) {
1230                 /* Unlinked - check for throttled port. */
1231                 D2("Port %d, successfully unlinked urb", serial->minor);
1232                 spin_lock(&serial->serial_lock);
1233                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1234                 hso_resubmit_rx_bulk_urb(serial, urb);
1235                 spin_unlock(&serial->serial_lock);
1236         } else {
1237                 D2("Port %d, status = %d for read urb", serial->minor, status);
1238                 return;
1239         }
1240 }
1241
1242 /*
1243  * This needs to be a tasklet otherwise we will
1244  * end up recursively calling this function.
1245  */
1246 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1247 {
1248         unsigned long flags;
1249
1250         spin_lock_irqsave(&serial->serial_lock, flags);
1251         if ((serial->parent->port_spec & HSO_INTF_MUX))
1252                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1253         else
1254                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1255         spin_unlock_irqrestore(&serial->serial_lock, flags);
1256 }
1257
1258 static  void hso_unthrottle(struct tty_struct *tty)
1259 {
1260         struct hso_serial *serial = tty->driver_data;
1261
1262         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1263 }
1264
1265 static void hso_unthrottle_workfunc(struct work_struct *work)
1266 {
1267         struct hso_serial *serial =
1268             container_of(work, struct hso_serial,
1269                          retry_unthrottle_workqueue);
1270         hso_unthrottle_tasklet(serial);
1271 }
1272
1273 /* open the requested serial port */
1274 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1275 {
1276         struct hso_serial *serial = get_serial_by_index(tty->index);
1277         int result;
1278
1279         /* sanity check */
1280         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1281                 WARN_ON(1);
1282                 tty->driver_data = NULL;
1283                 D1("Failed to open port");
1284                 return -ENODEV;
1285         }
1286
1287         mutex_lock(&serial->parent->mutex);
1288         result = usb_autopm_get_interface(serial->parent->interface);
1289         if (result < 0)
1290                 goto err_out;
1291
1292         D1("Opening %d", serial->minor);
1293         kref_get(&serial->parent->ref);
1294
1295         /* setup */
1296         tty->driver_data = serial;
1297         tty_port_tty_set(&serial->port, tty);
1298
1299         /* check for port already opened, if not set the termios */
1300         serial->port.count++;
1301         if (serial->port.count == 1) {
1302                 serial->rx_state = RX_IDLE;
1303                 /* Force default termio settings */
1304                 _hso_serial_set_termios(tty, NULL);
1305                 tasklet_init(&serial->unthrottle_tasklet,
1306                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1307                              (unsigned long)serial);
1308                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1309                           hso_unthrottle_workfunc);
1310                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1311                 if (result) {
1312                         hso_stop_serial_device(serial->parent);
1313                         serial->port.count--;
1314                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1315                 }
1316         } else {
1317                 D1("Port was already open");
1318         }
1319
1320         usb_autopm_put_interface(serial->parent->interface);
1321
1322         /* done */
1323         if (result)
1324                 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1325 err_out:
1326         mutex_unlock(&serial->parent->mutex);
1327         return result;
1328 }
1329
1330 /* close the requested serial port */
1331 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1332 {
1333         struct hso_serial *serial = tty->driver_data;
1334         u8 usb_gone;
1335
1336         D1("Closing serial port");
1337
1338         /* Open failed, no close cleanup required */
1339         if (serial == NULL)
1340                 return;
1341
1342         mutex_lock(&serial->parent->mutex);
1343         usb_gone = serial->parent->usb_gone;
1344
1345         if (!usb_gone)
1346                 usb_autopm_get_interface(serial->parent->interface);
1347
1348         /* reset the rts and dtr */
1349         /* do the actual close */
1350         serial->port.count--;
1351
1352         if (serial->port.count <= 0) {
1353                 serial->port.count = 0;
1354                 tty_port_tty_set(&serial->port, NULL);
1355                 if (!usb_gone)
1356                         hso_stop_serial_device(serial->parent);
1357                 tasklet_kill(&serial->unthrottle_tasklet);
1358                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1359         }
1360
1361         if (!usb_gone)
1362                 usb_autopm_put_interface(serial->parent->interface);
1363
1364         mutex_unlock(&serial->parent->mutex);
1365
1366         kref_put(&serial->parent->ref, hso_serial_ref_free);
1367 }
1368
1369 /* close the requested serial port */
1370 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1371                             int count)
1372 {
1373         struct hso_serial *serial = tty->driver_data;
1374         int space, tx_bytes;
1375         unsigned long flags;
1376
1377         /* sanity check */
1378         if (serial == NULL) {
1379                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1380                 return -ENODEV;
1381         }
1382
1383         spin_lock_irqsave(&serial->serial_lock, flags);
1384
1385         space = serial->tx_data_length - serial->tx_buffer_count;
1386         tx_bytes = (count < space) ? count : space;
1387
1388         if (!tx_bytes)
1389                 goto out;
1390
1391         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1392         serial->tx_buffer_count += tx_bytes;
1393
1394 out:
1395         spin_unlock_irqrestore(&serial->serial_lock, flags);
1396
1397         hso_kick_transmit(serial);
1398         /* done */
1399         return tx_bytes;
1400 }
1401
1402 /* how much room is there for writing */
1403 static int hso_serial_write_room(struct tty_struct *tty)
1404 {
1405         struct hso_serial *serial = tty->driver_data;
1406         int room;
1407         unsigned long flags;
1408
1409         spin_lock_irqsave(&serial->serial_lock, flags);
1410         room = serial->tx_data_length - serial->tx_buffer_count;
1411         spin_unlock_irqrestore(&serial->serial_lock, flags);
1412
1413         /* return free room */
1414         return room;
1415 }
1416
1417 /* setup the term */
1418 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1419 {
1420         struct hso_serial *serial = tty->driver_data;
1421         unsigned long flags;
1422
1423         if (old)
1424                 D5("Termios called with: cflags new[%d] - old[%d]",
1425                    tty->termios.c_cflag, old->c_cflag);
1426
1427         /* the actual setup */
1428         spin_lock_irqsave(&serial->serial_lock, flags);
1429         if (serial->port.count)
1430                 _hso_serial_set_termios(tty, old);
1431         else
1432                 tty->termios = *old;
1433         spin_unlock_irqrestore(&serial->serial_lock, flags);
1434
1435         /* done */
1436 }
1437
1438 /* how many characters in the buffer */
1439 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1440 {
1441         struct hso_serial *serial = tty->driver_data;
1442         int chars;
1443         unsigned long flags;
1444
1445         /* sanity check */
1446         if (serial == NULL)
1447                 return 0;
1448
1449         spin_lock_irqsave(&serial->serial_lock, flags);
1450         chars = serial->tx_buffer_count;
1451         spin_unlock_irqrestore(&serial->serial_lock, flags);
1452
1453         return chars;
1454 }
1455 static int tiocmget_submit_urb(struct hso_serial *serial,
1456                                struct hso_tiocmget *tiocmget,
1457                                struct usb_device *usb)
1458 {
1459         int result;
1460
1461         if (serial->parent->usb_gone)
1462                 return -ENODEV;
1463         usb_fill_int_urb(tiocmget->urb, usb,
1464                          usb_rcvintpipe(usb,
1465                                         tiocmget->endp->
1466                                         bEndpointAddress & 0x7F),
1467                          &tiocmget->serial_state_notification,
1468                          sizeof(struct hso_serial_state_notification),
1469                          tiocmget_intr_callback, serial,
1470                          tiocmget->endp->bInterval);
1471         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1472         if (result) {
1473                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1474                          result);
1475         }
1476         return result;
1477
1478 }
1479
1480 static void tiocmget_intr_callback(struct urb *urb)
1481 {
1482         struct hso_serial *serial = urb->context;
1483         struct hso_tiocmget *tiocmget;
1484         int status = urb->status;
1485         u16 UART_state_bitmap, prev_UART_state_bitmap;
1486         struct uart_icount *icount;
1487         struct hso_serial_state_notification *serial_state_notification;
1488         struct usb_device *usb;
1489         int if_num;
1490
1491         /* Sanity checks */
1492         if (!serial)
1493                 return;
1494         if (status) {
1495                 handle_usb_error(status, __func__, serial->parent);
1496                 return;
1497         }
1498
1499         /* tiocmget is only supported on HSO_PORT_MODEM */
1500         tiocmget = serial->tiocmget;
1501         if (!tiocmget)
1502                 return;
1503         BUG_ON((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM);
1504
1505         usb = serial->parent->usb;
1506         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1507
1508         /* wIndex should be the USB interface number of the port to which the
1509          * notification applies, which should always be the Modem port.
1510          */
1511         serial_state_notification = &tiocmget->serial_state_notification;
1512         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1513             serial_state_notification->bNotification != B_NOTIFICATION ||
1514             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1515             le16_to_cpu(serial_state_notification->wIndex) != if_num ||
1516             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1517                 dev_warn(&usb->dev,
1518                          "hso received invalid serial state notification\n");
1519                 DUMP(serial_state_notification,
1520                      sizeof(struct hso_serial_state_notification));
1521         } else {
1522
1523                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1524                                                 UART_state_bitmap);
1525                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1526                 icount = &tiocmget->icount;
1527                 spin_lock(&serial->serial_lock);
1528                 if ((UART_state_bitmap & B_OVERRUN) !=
1529                    (prev_UART_state_bitmap & B_OVERRUN))
1530                         icount->parity++;
1531                 if ((UART_state_bitmap & B_PARITY) !=
1532                    (prev_UART_state_bitmap & B_PARITY))
1533                         icount->parity++;
1534                 if ((UART_state_bitmap & B_FRAMING) !=
1535                    (prev_UART_state_bitmap & B_FRAMING))
1536                         icount->frame++;
1537                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1538                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1539                         icount->rng++;
1540                 if ((UART_state_bitmap & B_BREAK) !=
1541                    (prev_UART_state_bitmap & B_BREAK))
1542                         icount->brk++;
1543                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1544                    (prev_UART_state_bitmap & B_TX_CARRIER))
1545                         icount->dsr++;
1546                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1547                    (prev_UART_state_bitmap & B_RX_CARRIER))
1548                         icount->dcd++;
1549                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1550                 spin_unlock(&serial->serial_lock);
1551                 tiocmget->intr_completed = 1;
1552                 wake_up_interruptible(&tiocmget->waitq);
1553         }
1554         memset(serial_state_notification, 0,
1555                sizeof(struct hso_serial_state_notification));
1556         tiocmget_submit_urb(serial,
1557                             tiocmget,
1558                             serial->parent->usb);
1559 }
1560
1561 /*
1562  * next few functions largely stolen from drivers/serial/serial_core.c
1563  */
1564 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1565  * - mask passed in arg for lines of interest
1566  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1567  * Caller should use TIOCGICOUNT to see which one it was
1568  */
1569 static int
1570 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1571 {
1572         DECLARE_WAITQUEUE(wait, current);
1573         struct uart_icount cprev, cnow;
1574         struct hso_tiocmget  *tiocmget;
1575         int ret;
1576
1577         tiocmget = serial->tiocmget;
1578         if (!tiocmget)
1579                 return -ENOENT;
1580         /*
1581          * note the counters on entry
1582          */
1583         spin_lock_irq(&serial->serial_lock);
1584         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1585         spin_unlock_irq(&serial->serial_lock);
1586         add_wait_queue(&tiocmget->waitq, &wait);
1587         for (;;) {
1588                 spin_lock_irq(&serial->serial_lock);
1589                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1590                 spin_unlock_irq(&serial->serial_lock);
1591                 set_current_state(TASK_INTERRUPTIBLE);
1592                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1593                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1594                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1595                         ret = 0;
1596                         break;
1597                 }
1598                 schedule();
1599                 /* see if a signal did it */
1600                 if (signal_pending(current)) {
1601                         ret = -ERESTARTSYS;
1602                         break;
1603                 }
1604                 cprev = cnow;
1605         }
1606         current->state = TASK_RUNNING;
1607         remove_wait_queue(&tiocmget->waitq, &wait);
1608
1609         return ret;
1610 }
1611
1612 /*
1613  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1614  * Return: write counters to the user passed counter struct
1615  * NB: both 1->0 and 0->1 transitions are counted except for
1616  *     RI where only 0->1 is counted.
1617  */
1618 static int hso_get_count(struct tty_struct *tty,
1619                   struct serial_icounter_struct *icount)
1620 {
1621         struct uart_icount cnow;
1622         struct hso_serial *serial = tty->driver_data;
1623         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1624
1625         memset(icount, 0, sizeof(struct serial_icounter_struct));
1626
1627         if (!tiocmget)
1628                  return -ENOENT;
1629         spin_lock_irq(&serial->serial_lock);
1630         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1631         spin_unlock_irq(&serial->serial_lock);
1632
1633         icount->cts         = cnow.cts;
1634         icount->dsr         = cnow.dsr;
1635         icount->rng         = cnow.rng;
1636         icount->dcd         = cnow.dcd;
1637         icount->rx          = cnow.rx;
1638         icount->tx          = cnow.tx;
1639         icount->frame       = cnow.frame;
1640         icount->overrun     = cnow.overrun;
1641         icount->parity      = cnow.parity;
1642         icount->brk         = cnow.brk;
1643         icount->buf_overrun = cnow.buf_overrun;
1644
1645         return 0;
1646 }
1647
1648
1649 static int hso_serial_tiocmget(struct tty_struct *tty)
1650 {
1651         int retval;
1652         struct hso_serial *serial = tty->driver_data;
1653         struct hso_tiocmget  *tiocmget;
1654         u16 UART_state_bitmap;
1655
1656         /* sanity check */
1657         if (!serial) {
1658                 D1("no tty structures");
1659                 return -EINVAL;
1660         }
1661         spin_lock_irq(&serial->serial_lock);
1662         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1663             ((serial->dtr_state) ? TIOCM_DTR : 0);
1664         tiocmget = serial->tiocmget;
1665         if (tiocmget) {
1666
1667                 UART_state_bitmap = le16_to_cpu(
1668                         tiocmget->prev_UART_state_bitmap);
1669                 if (UART_state_bitmap & B_RING_SIGNAL)
1670                         retval |=  TIOCM_RNG;
1671                 if (UART_state_bitmap & B_RX_CARRIER)
1672                         retval |=  TIOCM_CD;
1673                 if (UART_state_bitmap & B_TX_CARRIER)
1674                         retval |=  TIOCM_DSR;
1675         }
1676         spin_unlock_irq(&serial->serial_lock);
1677         return retval;
1678 }
1679
1680 static int hso_serial_tiocmset(struct tty_struct *tty,
1681                                unsigned int set, unsigned int clear)
1682 {
1683         int val = 0;
1684         unsigned long flags;
1685         int if_num;
1686         struct hso_serial *serial = tty->driver_data;
1687
1688         /* sanity check */
1689         if (!serial) {
1690                 D1("no tty structures");
1691                 return -EINVAL;
1692         }
1693
1694         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1695                 return -EINVAL;
1696
1697         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1698
1699         spin_lock_irqsave(&serial->serial_lock, flags);
1700         if (set & TIOCM_RTS)
1701                 serial->rts_state = 1;
1702         if (set & TIOCM_DTR)
1703                 serial->dtr_state = 1;
1704
1705         if (clear & TIOCM_RTS)
1706                 serial->rts_state = 0;
1707         if (clear & TIOCM_DTR)
1708                 serial->dtr_state = 0;
1709
1710         if (serial->dtr_state)
1711                 val |= 0x01;
1712         if (serial->rts_state)
1713                 val |= 0x02;
1714
1715         spin_unlock_irqrestore(&serial->serial_lock, flags);
1716
1717         return usb_control_msg(serial->parent->usb,
1718                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1719                                0x21, val, if_num, NULL, 0,
1720                                USB_CTRL_SET_TIMEOUT);
1721 }
1722
1723 static int hso_serial_ioctl(struct tty_struct *tty,
1724                             unsigned int cmd, unsigned long arg)
1725 {
1726         struct hso_serial *serial = tty->driver_data;
1727         int ret = 0;
1728         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1729
1730         if (!serial)
1731                 return -ENODEV;
1732         switch (cmd) {
1733         case TIOCMIWAIT:
1734                 ret = hso_wait_modem_status(serial, arg);
1735                 break;
1736         default:
1737                 ret = -ENOIOCTLCMD;
1738                 break;
1739         }
1740         return ret;
1741 }
1742
1743
1744 /* starts a transmit */
1745 static void hso_kick_transmit(struct hso_serial *serial)
1746 {
1747         u8 *temp;
1748         unsigned long flags;
1749         int res;
1750
1751         spin_lock_irqsave(&serial->serial_lock, flags);
1752         if (!serial->tx_buffer_count)
1753                 goto out;
1754
1755         if (serial->tx_urb_used)
1756                 goto out;
1757
1758         /* Wakeup USB interface if necessary */
1759         if (hso_get_activity(serial->parent) == -EAGAIN)
1760                 goto out;
1761
1762         /* Switch pointers around to avoid memcpy */
1763         temp = serial->tx_buffer;
1764         serial->tx_buffer = serial->tx_data;
1765         serial->tx_data = temp;
1766         serial->tx_data_count = serial->tx_buffer_count;
1767         serial->tx_buffer_count = 0;
1768
1769         /* If temp is set, it means we switched buffers */
1770         if (temp && serial->write_data) {
1771                 res = serial->write_data(serial);
1772                 if (res >= 0)
1773                         serial->tx_urb_used = 1;
1774         }
1775 out:
1776         spin_unlock_irqrestore(&serial->serial_lock, flags);
1777 }
1778
1779 /* make a request (for reading and writing data to muxed serial port) */
1780 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1781                               struct urb *ctrl_urb,
1782                               struct usb_ctrlrequest *ctrl_req,
1783                               u8 *ctrl_urb_data, u32 size)
1784 {
1785         int result;
1786         int pipe;
1787
1788         /* Sanity check */
1789         if (!serial || !ctrl_urb || !ctrl_req) {
1790                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1791                 return -EINVAL;
1792         }
1793
1794         /* initialize */
1795         ctrl_req->wValue = 0;
1796         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1797         ctrl_req->wLength = cpu_to_le16(size);
1798
1799         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1800                 /* Reading command */
1801                 ctrl_req->bRequestType = USB_DIR_IN |
1802                                          USB_TYPE_OPTION_VENDOR |
1803                                          USB_RECIP_INTERFACE;
1804                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1805                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1806         } else {
1807                 /* Writing command */
1808                 ctrl_req->bRequestType = USB_DIR_OUT |
1809                                          USB_TYPE_OPTION_VENDOR |
1810                                          USB_RECIP_INTERFACE;
1811                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1812                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1813         }
1814         /* syslog */
1815         D2("%s command (%02x) len: %d, port: %d",
1816            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1817            ctrl_req->bRequestType, ctrl_req->wLength, port);
1818
1819         /* Load ctrl urb */
1820         ctrl_urb->transfer_flags = 0;
1821         usb_fill_control_urb(ctrl_urb,
1822                              serial->parent->usb,
1823                              pipe,
1824                              (u8 *) ctrl_req,
1825                              ctrl_urb_data, size, ctrl_callback, serial);
1826         /* Send it on merry way */
1827         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1828         if (result) {
1829                 dev_err(&ctrl_urb->dev->dev,
1830                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1831                         result, type);
1832                 return result;
1833         }
1834
1835         /* done */
1836         return size;
1837 }
1838
1839 /* called by intr_callback when read occurs */
1840 static int hso_mux_serial_read(struct hso_serial *serial)
1841 {
1842         if (!serial)
1843                 return -EINVAL;
1844
1845         /* clean data */
1846         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1847         /* make the request */
1848
1849         if (serial->num_rx_urbs != 1) {
1850                 dev_err(&serial->parent->interface->dev,
1851                         "ERROR: mux'd reads with multiple buffers "
1852                         "not possible\n");
1853                 return 0;
1854         }
1855         return mux_device_request(serial,
1856                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1857                                   serial->parent->port_spec & HSO_PORT_MASK,
1858                                   serial->rx_urb[0],
1859                                   &serial->ctrl_req_rx,
1860                                   serial->rx_data[0], serial->rx_data_length);
1861 }
1862
1863 /* used for muxed serial port callback (muxed serial read) */
1864 static void intr_callback(struct urb *urb)
1865 {
1866         struct hso_shared_int *shared_int = urb->context;
1867         struct hso_serial *serial;
1868         unsigned char *port_req;
1869         int status = urb->status;
1870         int i;
1871
1872         usb_mark_last_busy(urb->dev);
1873
1874         /* sanity check */
1875         if (!shared_int)
1876                 return;
1877
1878         /* status check */
1879         if (status) {
1880                 handle_usb_error(status, __func__, NULL);
1881                 return;
1882         }
1883         D4("\n--- Got intr callback 0x%02X ---", status);
1884
1885         /* what request? */
1886         port_req = urb->transfer_buffer;
1887         D4(" port_req = 0x%.2X\n", *port_req);
1888         /* loop over all muxed ports to find the one sending this */
1889         for (i = 0; i < 8; i++) {
1890                 /* max 8 channels on MUX */
1891                 if (*port_req & (1 << i)) {
1892                         serial = get_serial_by_shared_int_and_type(shared_int,
1893                                                                    (1 << i));
1894                         if (serial != NULL) {
1895                                 D1("Pending read interrupt on port %d\n", i);
1896                                 spin_lock(&serial->serial_lock);
1897                                 if (serial->rx_state == RX_IDLE &&
1898                                         serial->port.count > 0) {
1899                                         /* Setup and send a ctrl req read on
1900                                          * port i */
1901                                         if (!serial->rx_urb_filled[0]) {
1902                                                 serial->rx_state = RX_SENT;
1903                                                 hso_mux_serial_read(serial);
1904                                         } else
1905                                                 serial->rx_state = RX_PENDING;
1906                                 } else {
1907                                         D1("Already a read pending on "
1908                                            "port %d or port not open\n", i);
1909                                 }
1910                                 spin_unlock(&serial->serial_lock);
1911                         }
1912                 }
1913         }
1914         /* Resubmit interrupt urb */
1915         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1916 }
1917
1918 /* called for writing to muxed serial port */
1919 static int hso_mux_serial_write_data(struct hso_serial *serial)
1920 {
1921         if (NULL == serial)
1922                 return -EINVAL;
1923
1924         return mux_device_request(serial,
1925                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1926                                   serial->parent->port_spec & HSO_PORT_MASK,
1927                                   serial->tx_urb,
1928                                   &serial->ctrl_req_tx,
1929                                   serial->tx_data, serial->tx_data_count);
1930 }
1931
1932 /* write callback for Diag and CS port */
1933 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1934 {
1935         struct hso_serial *serial = urb->context;
1936         int status = urb->status;
1937
1938         /* sanity check */
1939         if (!serial) {
1940                 D1("serial == NULL");
1941                 return;
1942         }
1943
1944         spin_lock(&serial->serial_lock);
1945         serial->tx_urb_used = 0;
1946         spin_unlock(&serial->serial_lock);
1947         if (status) {
1948                 handle_usb_error(status, __func__, serial->parent);
1949                 return;
1950         }
1951         hso_put_activity(serial->parent);
1952         tty_port_tty_wakeup(&serial->port);
1953         hso_kick_transmit(serial);
1954
1955         D1(" ");
1956 }
1957
1958 /* called for writing diag or CS serial port */
1959 static int hso_std_serial_write_data(struct hso_serial *serial)
1960 {
1961         int count = serial->tx_data_count;
1962         int result;
1963
1964         usb_fill_bulk_urb(serial->tx_urb,
1965                           serial->parent->usb,
1966                           usb_sndbulkpipe(serial->parent->usb,
1967                                           serial->out_endp->
1968                                           bEndpointAddress & 0x7F),
1969                           serial->tx_data, serial->tx_data_count,
1970                           hso_std_serial_write_bulk_callback, serial);
1971
1972         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1973         if (result) {
1974                 dev_warn(&serial->parent->usb->dev,
1975                          "Failed to submit urb - res %d\n", result);
1976                 return result;
1977         }
1978
1979         return count;
1980 }
1981
1982 /* callback after read or write on muxed serial port */
1983 static void ctrl_callback(struct urb *urb)
1984 {
1985         struct hso_serial *serial = urb->context;
1986         struct usb_ctrlrequest *req;
1987         int status = urb->status;
1988
1989         /* sanity check */
1990         if (!serial)
1991                 return;
1992
1993         spin_lock(&serial->serial_lock);
1994         serial->tx_urb_used = 0;
1995         spin_unlock(&serial->serial_lock);
1996         if (status) {
1997                 handle_usb_error(status, __func__, serial->parent);
1998                 return;
1999         }
2000
2001         /* what request? */
2002         req = (struct usb_ctrlrequest *)(urb->setup_packet);
2003         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2004         D4("Actual length of urb = %d\n", urb->actual_length);
2005         DUMP1(urb->transfer_buffer, urb->actual_length);
2006
2007         if (req->bRequestType ==
2008             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2009                 /* response to a read command */
2010                 serial->rx_urb_filled[0] = 1;
2011                 spin_lock(&serial->serial_lock);
2012                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2013                 spin_unlock(&serial->serial_lock);
2014         } else {
2015                 hso_put_activity(serial->parent);
2016                 tty_port_tty_wakeup(&serial->port);
2017                 /* response to a write command */
2018                 hso_kick_transmit(serial);
2019         }
2020 }
2021
2022 /* handle RX data for serial port */
2023 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
2024 {
2025         struct tty_struct *tty;
2026         int write_length_remaining = 0;
2027         int curr_write_len;
2028
2029         /* Sanity check */
2030         if (urb == NULL || serial == NULL) {
2031                 D1("serial = NULL");
2032                 return -2;
2033         }
2034
2035         tty = tty_port_tty_get(&serial->port);
2036
2037         /* Push data to tty */
2038         write_length_remaining = urb->actual_length -
2039                 serial->curr_rx_urb_offset;
2040         D1("data to push to tty");
2041         while (write_length_remaining) {
2042                 if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
2043                         tty_kref_put(tty);
2044                         return -1;
2045                 }
2046                 curr_write_len = tty_insert_flip_string(&serial->port,
2047                         urb->transfer_buffer + serial->curr_rx_urb_offset,
2048                         write_length_remaining);
2049                 serial->curr_rx_urb_offset += curr_write_len;
2050                 write_length_remaining -= curr_write_len;
2051                 tty_flip_buffer_push(&serial->port);
2052         }
2053         tty_kref_put(tty);
2054
2055         if (write_length_remaining == 0) {
2056                 serial->curr_rx_urb_offset = 0;
2057                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
2058         }
2059         return write_length_remaining;
2060 }
2061
2062
2063 /* Base driver functions */
2064
2065 static void hso_log_port(struct hso_device *hso_dev)
2066 {
2067         char *port_type;
2068         char port_dev[20];
2069
2070         switch (hso_dev->port_spec & HSO_PORT_MASK) {
2071         case HSO_PORT_CONTROL:
2072                 port_type = "Control";
2073                 break;
2074         case HSO_PORT_APP:
2075                 port_type = "Application";
2076                 break;
2077         case HSO_PORT_GPS:
2078                 port_type = "GPS";
2079                 break;
2080         case HSO_PORT_GPS_CONTROL:
2081                 port_type = "GPS control";
2082                 break;
2083         case HSO_PORT_APP2:
2084                 port_type = "Application2";
2085                 break;
2086         case HSO_PORT_PCSC:
2087                 port_type = "PCSC";
2088                 break;
2089         case HSO_PORT_DIAG:
2090                 port_type = "Diagnostic";
2091                 break;
2092         case HSO_PORT_DIAG2:
2093                 port_type = "Diagnostic2";
2094                 break;
2095         case HSO_PORT_MODEM:
2096                 port_type = "Modem";
2097                 break;
2098         case HSO_PORT_NETWORK:
2099                 port_type = "Network";
2100                 break;
2101         default:
2102                 port_type = "Unknown";
2103                 break;
2104         }
2105         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2106                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
2107         } else
2108                 sprintf(port_dev, "/dev/%s%d", tty_filename,
2109                         dev2ser(hso_dev)->minor);
2110
2111         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
2112                 port_type, port_dev);
2113 }
2114
2115 static int hso_start_net_device(struct hso_device *hso_dev)
2116 {
2117         int i, result = 0;
2118         struct hso_net *hso_net = dev2net(hso_dev);
2119
2120         if (!hso_net)
2121                 return -ENODEV;
2122
2123         /* send URBs for all read buffers */
2124         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2125
2126                 /* Prep a receive URB */
2127                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
2128                                   hso_dev->usb,
2129                                   usb_rcvbulkpipe(hso_dev->usb,
2130                                                   hso_net->in_endp->
2131                                                   bEndpointAddress & 0x7F),
2132                                   hso_net->mux_bulk_rx_buf_pool[i],
2133                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
2134                                   hso_net);
2135
2136                 /* Put it out there so the device can send us stuff */
2137                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
2138                                         GFP_NOIO);
2139                 if (result)
2140                         dev_warn(&hso_dev->usb->dev,
2141                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
2142                                 i, result);
2143         }
2144
2145         return result;
2146 }
2147
2148 static int hso_stop_net_device(struct hso_device *hso_dev)
2149 {
2150         int i;
2151         struct hso_net *hso_net = dev2net(hso_dev);
2152
2153         if (!hso_net)
2154                 return -ENODEV;
2155
2156         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2157                 if (hso_net->mux_bulk_rx_urb_pool[i])
2158                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2159
2160         }
2161         if (hso_net->mux_bulk_tx_urb)
2162                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
2163
2164         return 0;
2165 }
2166
2167 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
2168 {
2169         int i, result = 0;
2170         struct hso_serial *serial = dev2ser(hso_dev);
2171
2172         if (!serial)
2173                 return -ENODEV;
2174
2175         /* If it is not the MUX port fill in and submit a bulk urb (already
2176          * allocated in hso_serial_start) */
2177         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
2178                 for (i = 0; i < serial->num_rx_urbs; i++) {
2179                         usb_fill_bulk_urb(serial->rx_urb[i],
2180                                           serial->parent->usb,
2181                                           usb_rcvbulkpipe(serial->parent->usb,
2182                                                           serial->in_endp->
2183                                                           bEndpointAddress &
2184                                                           0x7F),
2185                                           serial->rx_data[i],
2186                                           serial->rx_data_length,
2187                                           hso_std_serial_read_bulk_callback,
2188                                           serial);
2189                         result = usb_submit_urb(serial->rx_urb[i], flags);
2190                         if (result) {
2191                                 dev_warn(&serial->parent->usb->dev,
2192                                          "Failed to submit urb - res %d\n",
2193                                          result);
2194                                 break;
2195                         }
2196                 }
2197         } else {
2198                 mutex_lock(&serial->shared_int->shared_int_lock);
2199                 if (!serial->shared_int->use_count) {
2200                         result =
2201                             hso_mux_submit_intr_urb(serial->shared_int,
2202                                                     hso_dev->usb, flags);
2203                 }
2204                 serial->shared_int->use_count++;
2205                 mutex_unlock(&serial->shared_int->shared_int_lock);
2206         }
2207         if (serial->tiocmget)
2208                 tiocmget_submit_urb(serial,
2209                                     serial->tiocmget,
2210                                     serial->parent->usb);
2211         return result;
2212 }
2213
2214 static int hso_stop_serial_device(struct hso_device *hso_dev)
2215 {
2216         int i;
2217         struct hso_serial *serial = dev2ser(hso_dev);
2218         struct hso_tiocmget  *tiocmget;
2219
2220         if (!serial)
2221                 return -ENODEV;
2222
2223         for (i = 0; i < serial->num_rx_urbs; i++) {
2224                 if (serial->rx_urb[i]) {
2225                                 usb_kill_urb(serial->rx_urb[i]);
2226                                 serial->rx_urb_filled[i] = 0;
2227                 }
2228         }
2229         serial->curr_rx_urb_idx = 0;
2230         serial->curr_rx_urb_offset = 0;
2231
2232         if (serial->tx_urb)
2233                 usb_kill_urb(serial->tx_urb);
2234
2235         if (serial->shared_int) {
2236                 mutex_lock(&serial->shared_int->shared_int_lock);
2237                 if (serial->shared_int->use_count &&
2238                     (--serial->shared_int->use_count == 0)) {
2239                         struct urb *urb;
2240
2241                         urb = serial->shared_int->shared_intr_urb;
2242                         if (urb)
2243                                 usb_kill_urb(urb);
2244                 }
2245                 mutex_unlock(&serial->shared_int->shared_int_lock);
2246         }
2247         tiocmget = serial->tiocmget;
2248         if (tiocmget) {
2249                 wake_up_interruptible(&tiocmget->waitq);
2250                 usb_kill_urb(tiocmget->urb);
2251         }
2252
2253         return 0;
2254 }
2255
2256 static void hso_serial_common_free(struct hso_serial *serial)
2257 {
2258         int i;
2259
2260         if (serial->parent->dev)
2261                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
2262
2263         tty_unregister_device(tty_drv, serial->minor);
2264
2265         for (i = 0; i < serial->num_rx_urbs; i++) {
2266                 /* unlink and free RX URB */
2267                 usb_free_urb(serial->rx_urb[i]);
2268                 /* free the RX buffer */
2269                 kfree(serial->rx_data[i]);
2270         }
2271
2272         /* unlink and free TX URB */
2273         usb_free_urb(serial->tx_urb);
2274         kfree(serial->tx_data);
2275         tty_port_destroy(&serial->port);
2276 }
2277
2278 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
2279                                     int rx_size, int tx_size)
2280 {
2281         struct device *dev;
2282         int minor;
2283         int i;
2284
2285         tty_port_init(&serial->port);
2286
2287         minor = get_free_serial_index();
2288         if (minor < 0)
2289                 goto exit;
2290
2291         /* register our minor number */
2292         serial->parent->dev = tty_port_register_device(&serial->port, tty_drv,
2293                         minor, &serial->parent->interface->dev);
2294         dev = serial->parent->dev;
2295         dev_set_drvdata(dev, serial->parent);
2296         i = device_create_file(dev, &dev_attr_hsotype);
2297
2298         /* fill in specific data for later use */
2299         serial->minor = minor;
2300         serial->magic = HSO_SERIAL_MAGIC;
2301         spin_lock_init(&serial->serial_lock);
2302         serial->num_rx_urbs = num_urbs;
2303
2304         /* RX, allocate urb and initialize */
2305
2306         /* prepare our RX buffer */
2307         serial->rx_data_length = rx_size;
2308         for (i = 0; i < serial->num_rx_urbs; i++) {
2309                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
2310                 if (!serial->rx_urb[i]) {
2311                         dev_err(dev, "Could not allocate urb?\n");
2312                         goto exit;
2313                 }
2314                 serial->rx_urb[i]->transfer_buffer = NULL;
2315                 serial->rx_urb[i]->transfer_buffer_length = 0;
2316                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
2317                                              GFP_KERNEL);
2318                 if (!serial->rx_data[i])
2319                         goto exit;
2320         }
2321
2322         /* TX, allocate urb and initialize */
2323         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2324         if (!serial->tx_urb) {
2325                 dev_err(dev, "Could not allocate urb?\n");
2326                 goto exit;
2327         }
2328         serial->tx_urb->transfer_buffer = NULL;
2329         serial->tx_urb->transfer_buffer_length = 0;
2330         /* prepare our TX buffer */
2331         serial->tx_data_count = 0;
2332         serial->tx_buffer_count = 0;
2333         serial->tx_data_length = tx_size;
2334         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
2335         if (!serial->tx_data)
2336                 goto exit;
2337
2338         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
2339         if (!serial->tx_buffer)
2340                 goto exit;
2341
2342         return 0;
2343 exit:
2344         hso_serial_common_free(serial);
2345         return -1;
2346 }
2347
2348 /* Creates a general hso device */
2349 static struct hso_device *hso_create_device(struct usb_interface *intf,
2350                                             int port_spec)
2351 {
2352         struct hso_device *hso_dev;
2353
2354         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
2355         if (!hso_dev)
2356                 return NULL;
2357
2358         hso_dev->port_spec = port_spec;
2359         hso_dev->usb = interface_to_usbdev(intf);
2360         hso_dev->interface = intf;
2361         kref_init(&hso_dev->ref);
2362         mutex_init(&hso_dev->mutex);
2363
2364         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
2365         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
2366         INIT_WORK(&hso_dev->reset_device, reset_device);
2367
2368         return hso_dev;
2369 }
2370
2371 /* Removes a network device in the network device table */
2372 static int remove_net_device(struct hso_device *hso_dev)
2373 {
2374         int i;
2375
2376         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2377                 if (network_table[i] == hso_dev) {
2378                         network_table[i] = NULL;
2379                         break;
2380                 }
2381         }
2382         if (i == HSO_MAX_NET_DEVICES)
2383                 return -1;
2384         return 0;
2385 }
2386
2387 /* Frees our network device */
2388 static void hso_free_net_device(struct hso_device *hso_dev)
2389 {
2390         int i;
2391         struct hso_net *hso_net = dev2net(hso_dev);
2392
2393         if (!hso_net)
2394                 return;
2395
2396         remove_net_device(hso_net->parent);
2397
2398         if (hso_net->net)
2399                 unregister_netdev(hso_net->net);
2400
2401         /* start freeing */
2402         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2403                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
2404                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
2405                 hso_net->mux_bulk_rx_buf_pool[i] = NULL;
2406         }
2407         usb_free_urb(hso_net->mux_bulk_tx_urb);
2408         kfree(hso_net->mux_bulk_tx_buf);
2409         hso_net->mux_bulk_tx_buf = NULL;
2410
2411         if (hso_net->net)
2412                 free_netdev(hso_net->net);
2413
2414         kfree(hso_dev);
2415 }
2416
2417 static const struct net_device_ops hso_netdev_ops = {
2418         .ndo_open       = hso_net_open,
2419         .ndo_stop       = hso_net_close,
2420         .ndo_start_xmit = hso_net_start_xmit,
2421         .ndo_tx_timeout = hso_net_tx_timeout,
2422 };
2423
2424 /* initialize the network interface */
2425 static void hso_net_init(struct net_device *net)
2426 {
2427         struct hso_net *hso_net = netdev_priv(net);
2428
2429         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
2430
2431         /* fill in the other fields */
2432         net->netdev_ops = &hso_netdev_ops;
2433         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
2434         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
2435         net->type = ARPHRD_NONE;
2436         net->mtu = DEFAULT_MTU - 14;
2437         net->tx_queue_len = 10;
2438         SET_ETHTOOL_OPS(net, &ops);
2439
2440         /* and initialize the semaphore */
2441         spin_lock_init(&hso_net->net_lock);
2442 }
2443
2444 /* Adds a network device in the network device table */
2445 static int add_net_device(struct hso_device *hso_dev)
2446 {
2447         int i;
2448
2449         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2450                 if (network_table[i] == NULL) {
2451                         network_table[i] = hso_dev;
2452                         break;
2453                 }
2454         }
2455         if (i == HSO_MAX_NET_DEVICES)
2456                 return -1;
2457         return 0;
2458 }
2459
2460 static int hso_rfkill_set_block(void *data, bool blocked)
2461 {
2462         struct hso_device *hso_dev = data;
2463         int enabled = !blocked;
2464         int rv;
2465
2466         mutex_lock(&hso_dev->mutex);
2467         if (hso_dev->usb_gone)
2468                 rv = 0;
2469         else
2470                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2471                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2472                                        USB_CTRL_SET_TIMEOUT);
2473         mutex_unlock(&hso_dev->mutex);
2474         return rv;
2475 }
2476
2477 static const struct rfkill_ops hso_rfkill_ops = {
2478         .set_block = hso_rfkill_set_block,
2479 };
2480
2481 /* Creates and sets up everything for rfkill */
2482 static void hso_create_rfkill(struct hso_device *hso_dev,
2483                              struct usb_interface *interface)
2484 {
2485         struct hso_net *hso_net = dev2net(hso_dev);
2486         struct device *dev = &hso_net->net->dev;
2487         char *rfkn;
2488
2489         rfkn = kzalloc(20, GFP_KERNEL);
2490         if (!rfkn)
2491                 dev_err(dev, "%s - Out of memory\n", __func__);
2492
2493         snprintf(rfkn, 20, "hso-%d",
2494                  interface->altsetting->desc.bInterfaceNumber);
2495
2496         hso_net->rfkill = rfkill_alloc(rfkn,
2497                                        &interface_to_usbdev(interface)->dev,
2498                                        RFKILL_TYPE_WWAN,
2499                                        &hso_rfkill_ops, hso_dev);
2500         if (!hso_net->rfkill) {
2501                 dev_err(dev, "%s - Out of memory\n", __func__);
2502                 kfree(rfkn);
2503                 return;
2504         }
2505         if (rfkill_register(hso_net->rfkill) < 0) {
2506                 rfkill_destroy(hso_net->rfkill);
2507                 kfree(rfkn);
2508                 hso_net->rfkill = NULL;
2509                 dev_err(dev, "%s - Failed to register rfkill\n", __func__);
2510                 return;
2511         }
2512 }
2513
2514 static struct device_type hso_type = {
2515         .name   = "wwan",
2516 };
2517
2518 /* Creates our network device */
2519 static struct hso_device *hso_create_net_device(struct usb_interface *interface,
2520                                                 int port_spec)
2521 {
2522         int result, i;
2523         struct net_device *net;
2524         struct hso_net *hso_net;
2525         struct hso_device *hso_dev;
2526
2527         hso_dev = hso_create_device(interface, port_spec);
2528         if (!hso_dev)
2529                 return NULL;
2530
2531         /* allocate our network device, then we can put in our private data */
2532         /* call hso_net_init to do the basic initialization */
2533         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2534         if (!net) {
2535                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2536                 goto exit;
2537         }
2538
2539         hso_net = netdev_priv(net);
2540
2541         hso_dev->port_data.dev_net = hso_net;
2542         hso_net->net = net;
2543         hso_net->parent = hso_dev;
2544
2545         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2546                                       USB_DIR_IN);
2547         if (!hso_net->in_endp) {
2548                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2549                 goto exit;
2550         }
2551         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2552                                        USB_DIR_OUT);
2553         if (!hso_net->out_endp) {
2554                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2555                 goto exit;
2556         }
2557         SET_NETDEV_DEV(net, &interface->dev);
2558         SET_NETDEV_DEVTYPE(net, &hso_type);
2559
2560         /* registering our net device */
2561         result = register_netdev(net);
2562         if (result) {
2563                 dev_err(&interface->dev, "Failed to register device\n");
2564                 goto exit;
2565         }
2566
2567         /* start allocating */
2568         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2569                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2570                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2571                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2572                         goto exit;
2573                 }
2574                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2575                                                            GFP_KERNEL);
2576                 if (!hso_net->mux_bulk_rx_buf_pool[i])
2577                         goto exit;
2578         }
2579         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2580         if (!hso_net->mux_bulk_tx_urb) {
2581                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2582                 goto exit;
2583         }
2584         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2585         if (!hso_net->mux_bulk_tx_buf)
2586                 goto exit;
2587
2588         add_net_device(hso_dev);
2589
2590         hso_log_port(hso_dev);
2591
2592         hso_create_rfkill(hso_dev, interface);
2593
2594         return hso_dev;
2595 exit:
2596         hso_free_net_device(hso_dev);
2597         return NULL;
2598 }
2599
2600 static void hso_free_tiomget(struct hso_serial *serial)
2601 {
2602         struct hso_tiocmget *tiocmget;
2603         if (!serial)
2604                 return;
2605         tiocmget = serial->tiocmget;
2606         if (tiocmget) {
2607                 usb_free_urb(tiocmget->urb);
2608                 tiocmget->urb = NULL;
2609                 serial->tiocmget = NULL;
2610                 kfree(tiocmget);
2611         }
2612 }
2613
2614 /* Frees an AT channel ( goes for both mux and non-mux ) */
2615 static void hso_free_serial_device(struct hso_device *hso_dev)
2616 {
2617         struct hso_serial *serial = dev2ser(hso_dev);
2618
2619         if (!serial)
2620                 return;
2621         set_serial_by_index(serial->minor, NULL);
2622
2623         hso_serial_common_free(serial);
2624
2625         if (serial->shared_int) {
2626                 mutex_lock(&serial->shared_int->shared_int_lock);
2627                 if (--serial->shared_int->ref_count == 0)
2628                         hso_free_shared_int(serial->shared_int);
2629                 else
2630                         mutex_unlock(&serial->shared_int->shared_int_lock);
2631         }
2632         hso_free_tiomget(serial);
2633         kfree(serial);
2634         kfree(hso_dev);
2635 }
2636
2637 /* Creates a bulk AT channel */
2638 static struct hso_device *hso_create_bulk_serial_device(
2639                         struct usb_interface *interface, int port)
2640 {
2641         struct hso_device *hso_dev;
2642         struct hso_serial *serial;
2643         int num_urbs;
2644         struct hso_tiocmget *tiocmget;
2645
2646         hso_dev = hso_create_device(interface, port);
2647         if (!hso_dev)
2648                 return NULL;
2649
2650         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2651         if (!serial)
2652                 goto exit;
2653
2654         serial->parent = hso_dev;
2655         hso_dev->port_data.dev_serial = serial;
2656
2657         if ((port & HSO_PORT_MASK) == HSO_PORT_MODEM) {
2658                 num_urbs = 2;
2659                 serial->tiocmget = kzalloc(sizeof(struct hso_tiocmget),
2660                                            GFP_KERNEL);
2661                 /* it isn't going to break our heart if serial->tiocmget
2662                  *  allocation fails don't bother checking this.
2663                  */
2664                 if (serial->tiocmget) {
2665                         tiocmget = serial->tiocmget;
2666                         tiocmget->urb = usb_alloc_urb(0, GFP_KERNEL);
2667                         if (tiocmget->urb) {
2668                                 mutex_init(&tiocmget->mutex);
2669                                 init_waitqueue_head(&tiocmget->waitq);
2670                                 tiocmget->endp = hso_get_ep(
2671                                         interface,
2672                                         USB_ENDPOINT_XFER_INT,
2673                                         USB_DIR_IN);
2674                         } else
2675                                 hso_free_tiomget(serial);
2676                 }
2677         }
2678         else
2679                 num_urbs = 1;
2680
2681         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2682                                      BULK_URB_TX_SIZE))
2683                 goto exit;
2684
2685         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2686                                      USB_DIR_IN);
2687         if (!serial->in_endp) {
2688                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2689                 goto exit2;
2690         }
2691
2692         if (!
2693             (serial->out_endp =
2694              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2695                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2696                 goto exit2;
2697         }
2698
2699         serial->write_data = hso_std_serial_write_data;
2700
2701         /* and record this serial */
2702         set_serial_by_index(serial->minor, serial);
2703
2704         /* setup the proc dirs and files if needed */
2705         hso_log_port(hso_dev);
2706
2707         /* done, return it */
2708         return hso_dev;
2709
2710 exit2:
2711         hso_serial_common_free(serial);
2712 exit:
2713         hso_free_tiomget(serial);
2714         kfree(serial);
2715         kfree(hso_dev);
2716         return NULL;
2717 }
2718
2719 /* Creates a multiplexed AT channel */
2720 static
2721 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2722                                                 int port,
2723                                                 struct hso_shared_int *mux)
2724 {
2725         struct hso_device *hso_dev;
2726         struct hso_serial *serial;
2727         int port_spec;
2728
2729         port_spec = HSO_INTF_MUX;
2730         port_spec &= ~HSO_PORT_MASK;
2731
2732         port_spec |= hso_mux_to_port(port);
2733         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2734                 return NULL;
2735
2736         hso_dev = hso_create_device(interface, port_spec);
2737         if (!hso_dev)
2738                 return NULL;
2739
2740         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2741         if (!serial)
2742                 goto exit;
2743
2744         hso_dev->port_data.dev_serial = serial;
2745         serial->parent = hso_dev;
2746
2747         if (hso_serial_common_create
2748             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2749                 goto exit;
2750
2751         serial->tx_data_length--;
2752         serial->write_data = hso_mux_serial_write_data;
2753
2754         serial->shared_int = mux;
2755         mutex_lock(&serial->shared_int->shared_int_lock);
2756         serial->shared_int->ref_count++;
2757         mutex_unlock(&serial->shared_int->shared_int_lock);
2758
2759         /* and record this serial */
2760         set_serial_by_index(serial->minor, serial);
2761
2762         /* setup the proc dirs and files if needed */
2763         hso_log_port(hso_dev);
2764
2765         /* done, return it */
2766         return hso_dev;
2767
2768 exit:
2769         if (serial) {
2770                 tty_unregister_device(tty_drv, serial->minor);
2771                 kfree(serial);
2772         }
2773         if (hso_dev)
2774                 kfree(hso_dev);
2775         return NULL;
2776
2777 }
2778
2779 static void hso_free_shared_int(struct hso_shared_int *mux)
2780 {
2781         usb_free_urb(mux->shared_intr_urb);
2782         kfree(mux->shared_intr_buf);
2783         mutex_unlock(&mux->shared_int_lock);
2784         kfree(mux);
2785 }
2786
2787 static
2788 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2789 {
2790         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2791
2792         if (!mux)
2793                 return NULL;
2794
2795         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2796                                     USB_DIR_IN);
2797         if (!mux->intr_endp) {
2798                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2799                 goto exit;
2800         }
2801
2802         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2803         if (!mux->shared_intr_urb) {
2804                 dev_err(&interface->dev, "Could not allocate intr urb?\n");
2805                 goto exit;
2806         }
2807         mux->shared_intr_buf =
2808                 kzalloc(le16_to_cpu(mux->intr_endp->wMaxPacketSize),
2809                         GFP_KERNEL);
2810         if (!mux->shared_intr_buf)
2811                 goto exit;
2812
2813         mutex_init(&mux->shared_int_lock);
2814
2815         return mux;
2816
2817 exit:
2818         kfree(mux->shared_intr_buf);
2819         usb_free_urb(mux->shared_intr_urb);
2820         kfree(mux);
2821         return NULL;
2822 }
2823
2824 /* Gets the port spec for a certain interface */
2825 static int hso_get_config_data(struct usb_interface *interface)
2826 {
2827         struct usb_device *usbdev = interface_to_usbdev(interface);
2828         u8 *config_data = kmalloc(17, GFP_KERNEL);
2829         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2830         s32 result;
2831
2832         if (!config_data)
2833                 return -ENOMEM;
2834         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2835                             0x86, 0xC0, 0, 0, config_data, 17,
2836                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2837                 kfree(config_data);
2838                 return -EIO;
2839         }
2840
2841         switch (config_data[if_num]) {
2842         case 0x0:
2843                 result = 0;
2844                 break;
2845         case 0x1:
2846                 result = HSO_PORT_DIAG;
2847                 break;
2848         case 0x2:
2849                 result = HSO_PORT_GPS;
2850                 break;
2851         case 0x3:
2852                 result = HSO_PORT_GPS_CONTROL;
2853                 break;
2854         case 0x4:
2855                 result = HSO_PORT_APP;
2856                 break;
2857         case 0x5:
2858                 result = HSO_PORT_APP2;
2859                 break;
2860         case 0x6:
2861                 result = HSO_PORT_CONTROL;
2862                 break;
2863         case 0x7:
2864                 result = HSO_PORT_NETWORK;
2865                 break;
2866         case 0x8:
2867                 result = HSO_PORT_MODEM;
2868                 break;
2869         case 0x9:
2870                 result = HSO_PORT_MSD;
2871                 break;
2872         case 0xa:
2873                 result = HSO_PORT_PCSC;
2874                 break;
2875         case 0xb:
2876                 result = HSO_PORT_VOICE;
2877                 break;
2878         default:
2879                 result = 0;
2880         }
2881
2882         if (result)
2883                 result |= HSO_INTF_BULK;
2884
2885         if (config_data[16] & 0x1)
2886                 result |= HSO_INFO_CRC_BUG;
2887
2888         kfree(config_data);
2889         return result;
2890 }
2891
2892 /* called once for each interface upon device insertion */
2893 static int hso_probe(struct usb_interface *interface,
2894                      const struct usb_device_id *id)
2895 {
2896         int mux, i, if_num, port_spec;
2897         unsigned char port_mask;
2898         struct hso_device *hso_dev = NULL;
2899         struct hso_shared_int *shared_int;
2900         struct hso_device *tmp_dev = NULL;
2901
2902         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2903                 dev_err(&interface->dev, "Not our interface\n");
2904                 return -ENODEV;
2905         }
2906
2907         if_num = interface->altsetting->desc.bInterfaceNumber;
2908
2909         /* Get the interface/port specification from either driver_info or from
2910          * the device itself */
2911         if (id->driver_info)
2912                 port_spec = ((u32 *)(id->driver_info))[if_num];
2913         else
2914                 port_spec = hso_get_config_data(interface);
2915
2916         /* Check if we need to switch to alt interfaces prior to port
2917          * configuration */
2918         if (interface->num_altsetting > 1)
2919                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2920         interface->needs_remote_wakeup = 1;
2921
2922         /* Allocate new hso device(s) */
2923         switch (port_spec & HSO_INTF_MASK) {
2924         case HSO_INTF_MUX:
2925                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2926                         /* Create the network device */
2927                         if (!disable_net) {
2928                                 hso_dev = hso_create_net_device(interface,
2929                                                                 port_spec);
2930                                 if (!hso_dev)
2931                                         goto exit;
2932                                 tmp_dev = hso_dev;
2933                         }
2934                 }
2935
2936                 if (hso_get_mux_ports(interface, &port_mask))
2937                         /* TODO: de-allocate everything */
2938                         goto exit;
2939
2940                 shared_int = hso_create_shared_int(interface);
2941                 if (!shared_int)
2942                         goto exit;
2943
2944                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2945                         if (port_mask & i) {
2946                                 hso_dev = hso_create_mux_serial_device(
2947                                                 interface, i, shared_int);
2948                                 if (!hso_dev)
2949                                         goto exit;
2950                         }
2951                 }
2952
2953                 if (tmp_dev)
2954                         hso_dev = tmp_dev;
2955                 break;
2956
2957         case HSO_INTF_BULK:
2958                 /* It's a regular bulk interface */
2959                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2960                         if (!disable_net)
2961                                 hso_dev =
2962                                     hso_create_net_device(interface, port_spec);
2963                 } else {
2964                         hso_dev =
2965                             hso_create_bulk_serial_device(interface, port_spec);
2966                 }
2967                 if (!hso_dev)
2968                         goto exit;
2969                 break;
2970         default:
2971                 goto exit;
2972         }
2973
2974         /* save our data pointer in this device */
2975         usb_set_intfdata(interface, hso_dev);
2976
2977         /* done */
2978         return 0;
2979 exit:
2980         hso_free_interface(interface);
2981         return -ENODEV;
2982 }
2983
2984 /* device removed, cleaning up */
2985 static void hso_disconnect(struct usb_interface *interface)
2986 {
2987         hso_free_interface(interface);
2988
2989         /* remove reference of our private data */
2990         usb_set_intfdata(interface, NULL);
2991 }
2992
2993 static void async_get_intf(struct work_struct *data)
2994 {
2995         struct hso_device *hso_dev =
2996             container_of(data, struct hso_device, async_get_intf);
2997         usb_autopm_get_interface(hso_dev->interface);
2998 }
2999
3000 static void async_put_intf(struct work_struct *data)
3001 {
3002         struct hso_device *hso_dev =
3003             container_of(data, struct hso_device, async_put_intf);
3004         usb_autopm_put_interface(hso_dev->interface);
3005 }
3006
3007 static int hso_get_activity(struct hso_device *hso_dev)
3008 {
3009         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3010                 if (!hso_dev->is_active) {
3011                         hso_dev->is_active = 1;
3012                         schedule_work(&hso_dev->async_get_intf);
3013                 }
3014         }
3015
3016         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3017                 return -EAGAIN;
3018
3019         usb_mark_last_busy(hso_dev->usb);
3020
3021         return 0;
3022 }
3023
3024 static int hso_put_activity(struct hso_device *hso_dev)
3025 {
3026         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3027                 if (hso_dev->is_active) {
3028                         hso_dev->is_active = 0;
3029                         schedule_work(&hso_dev->async_put_intf);
3030                         return -EAGAIN;
3031                 }
3032         }
3033         hso_dev->is_active = 0;
3034         return 0;
3035 }
3036
3037 /* called by kernel when we need to suspend device */
3038 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3039 {
3040         int i, result;
3041
3042         /* Stop all serial ports */
3043         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3044                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3045                         result = hso_stop_serial_device(serial_table[i]);
3046                         if (result)
3047                                 goto out;
3048                 }
3049         }
3050
3051         /* Stop all network ports */
3052         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3053                 if (network_table[i] &&
3054                     (network_table[i]->interface == iface)) {
3055                         result = hso_stop_net_device(network_table[i]);
3056                         if (result)
3057                                 goto out;
3058                 }
3059         }
3060
3061 out:
3062         return 0;
3063 }
3064
3065 /* called by kernel when we need to resume device */
3066 static int hso_resume(struct usb_interface *iface)
3067 {
3068         int i, result = 0;
3069         struct hso_net *hso_net;
3070
3071         /* Start all serial ports */
3072         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3073                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3074                         if (dev2ser(serial_table[i])->port.count) {
3075                                 result =
3076                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3077                                 hso_kick_transmit(dev2ser(serial_table[i]));
3078                                 if (result)
3079                                         goto out;
3080                         }
3081                 }
3082         }
3083
3084         /* Start all network ports */
3085         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3086                 if (network_table[i] &&
3087                     (network_table[i]->interface == iface)) {
3088                         hso_net = dev2net(network_table[i]);
3089                         if (hso_net->flags & IFF_UP) {
3090                                 /* First transmit any lingering data,
3091                                    then restart the device. */
3092                                 if (hso_net->skb_tx_buf) {
3093                                         dev_dbg(&iface->dev,
3094                                                 "Transmitting"
3095                                                 " lingering data\n");
3096                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3097                                                            hso_net->net);
3098                                         hso_net->skb_tx_buf = NULL;
3099                                 }
3100                                 result = hso_start_net_device(network_table[i]);
3101                                 if (result)
3102                                         goto out;
3103                         }
3104                 }
3105         }
3106
3107 out:
3108         return result;
3109 }
3110
3111 static void reset_device(struct work_struct *data)
3112 {
3113         struct hso_device *hso_dev =
3114             container_of(data, struct hso_device, reset_device);
3115         struct usb_device *usb = hso_dev->usb;
3116         int result;
3117
3118         if (hso_dev->usb_gone) {
3119                 D1("No reset during disconnect\n");
3120         } else {
3121                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3122                 if (result < 0)
3123                         D1("unable to lock device for reset: %d\n", result);
3124                 else {
3125                         usb_reset_device(usb);
3126                         usb_unlock_device(usb);
3127                 }
3128         }
3129 }
3130
3131 static void hso_serial_ref_free(struct kref *ref)
3132 {
3133         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3134
3135         hso_free_serial_device(hso_dev);
3136 }
3137
3138 static void hso_free_interface(struct usb_interface *interface)
3139 {
3140         struct hso_serial *hso_dev;
3141         int i;
3142
3143         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3144                 if (serial_table[i] &&
3145                     (serial_table[i]->interface == interface)) {
3146                         hso_dev = dev2ser(serial_table[i]);
3147                         tty_port_tty_hangup(&hso_dev->port, false);
3148                         mutex_lock(&hso_dev->parent->mutex);
3149                         hso_dev->parent->usb_gone = 1;
3150                         mutex_unlock(&hso_dev->parent->mutex);
3151                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
3152                 }
3153         }
3154
3155         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3156                 if (network_table[i] &&
3157                     (network_table[i]->interface == interface)) {
3158                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
3159                         /* hso_stop_net_device doesn't stop the net queue since
3160                          * traffic needs to start it again when suspended */
3161                         netif_stop_queue(dev2net(network_table[i])->net);
3162                         hso_stop_net_device(network_table[i]);
3163                         cancel_work_sync(&network_table[i]->async_put_intf);
3164                         cancel_work_sync(&network_table[i]->async_get_intf);
3165                         if (rfk) {
3166                                 rfkill_unregister(rfk);
3167                                 rfkill_destroy(rfk);
3168                         }
3169                         hso_free_net_device(network_table[i]);
3170                 }
3171         }
3172 }
3173
3174 /* Helper functions */
3175
3176 /* Get the endpoint ! */
3177 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
3178                                                   int type, int dir)
3179 {
3180         int i;
3181         struct usb_host_interface *iface = intf->cur_altsetting;
3182         struct usb_endpoint_descriptor *endp;
3183
3184         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3185                 endp = &iface->endpoint[i].desc;
3186                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
3187                     (usb_endpoint_type(endp) == type))
3188                         return endp;
3189         }
3190
3191         return NULL;
3192 }
3193
3194 /* Get the byte that describes which ports are enabled */
3195 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
3196 {
3197         int i;
3198         struct usb_host_interface *iface = intf->cur_altsetting;
3199
3200         if (iface->extralen == 3) {
3201                 *ports = iface->extra[2];
3202                 return 0;
3203         }
3204
3205         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
3206                 if (iface->endpoint[i].extralen == 3) {
3207                         *ports = iface->endpoint[i].extra[2];
3208                         return 0;
3209                 }
3210         }
3211
3212         return -1;
3213 }
3214
3215 /* interrupt urb needs to be submitted, used for serial read of muxed port */
3216 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
3217                                    struct usb_device *usb, gfp_t gfp)
3218 {
3219         int result;
3220
3221         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
3222                          usb_rcvintpipe(usb,
3223                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
3224                          shared_int->shared_intr_buf,
3225                          1,
3226                          intr_callback, shared_int,
3227                          shared_int->intr_endp->bInterval);
3228
3229         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
3230         if (result)
3231                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d\n", __func__,
3232                         result);
3233
3234         return result;
3235 }
3236
3237 /* operations setup of the serial interface */
3238 static const struct tty_operations hso_serial_ops = {
3239         .open = hso_serial_open,
3240         .close = hso_serial_close,
3241         .write = hso_serial_write,
3242         .write_room = hso_serial_write_room,
3243         .ioctl = hso_serial_ioctl,
3244         .set_termios = hso_serial_set_termios,
3245         .chars_in_buffer = hso_serial_chars_in_buffer,
3246         .tiocmget = hso_serial_tiocmget,
3247         .tiocmset = hso_serial_tiocmset,
3248         .get_icount = hso_get_count,
3249         .unthrottle = hso_unthrottle
3250 };
3251
3252 static struct usb_driver hso_driver = {
3253         .name = driver_name,
3254         .probe = hso_probe,
3255         .disconnect = hso_disconnect,
3256         .id_table = hso_ids,
3257         .suspend = hso_suspend,
3258         .resume = hso_resume,
3259         .reset_resume = hso_resume,
3260         .supports_autosuspend = 1,
3261         .disable_hub_initiated_lpm = 1,
3262 };
3263
3264 static int __init hso_init(void)
3265 {
3266         int i;
3267         int result;
3268
3269         /* put it in the log */
3270         printk(KERN_INFO "hso: %s\n", version);
3271
3272         /* Initialise the serial table semaphore and table */
3273         spin_lock_init(&serial_table_lock);
3274         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
3275                 serial_table[i] = NULL;
3276
3277         /* allocate our driver using the proper amount of supported minors */
3278         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
3279         if (!tty_drv)
3280                 return -ENOMEM;
3281
3282         /* fill in all needed values */
3283         tty_drv->driver_name = driver_name;
3284         tty_drv->name = tty_filename;
3285
3286         /* if major number is provided as parameter, use that one */
3287         if (tty_major)
3288                 tty_drv->major = tty_major;
3289
3290         tty_drv->minor_start = 0;
3291         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
3292         tty_drv->subtype = SERIAL_TYPE_NORMAL;
3293         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
3294         tty_drv->init_termios = tty_std_termios;
3295         hso_init_termios(&tty_drv->init_termios);
3296         tty_set_operations(tty_drv, &hso_serial_ops);
3297
3298         /* register the tty driver */
3299         result = tty_register_driver(tty_drv);
3300         if (result) {
3301                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
3302                         __func__, result);
3303                 goto err_free_tty;
3304         }
3305
3306         /* register this module as an usb driver */
3307         result = usb_register(&hso_driver);
3308         if (result) {
3309                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
3310                         result);
3311                 goto err_unreg_tty;
3312         }
3313
3314         /* done */
3315         return 0;
3316 err_unreg_tty:
3317         tty_unregister_driver(tty_drv);
3318 err_free_tty:
3319         put_tty_driver(tty_drv);
3320         return result;
3321 }
3322
3323 static void __exit hso_exit(void)
3324 {
3325         printk(KERN_INFO "hso: unloaded\n");
3326
3327         tty_unregister_driver(tty_drv);
3328         put_tty_driver(tty_drv);
3329         /* deregister the usb driver */
3330         usb_deregister(&hso_driver);
3331 }
3332
3333 /* Module definitions */
3334 module_init(hso_init);
3335 module_exit(hso_exit);
3336
3337 MODULE_AUTHOR(MOD_AUTHOR);
3338 MODULE_DESCRIPTION(MOD_DESCRIPTION);
3339 MODULE_LICENSE(MOD_LICENSE);
3340
3341 /* change the debug level (eg: insmod hso.ko debug=0x04) */
3342 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
3343 module_param(debug, int, S_IRUGO | S_IWUSR);
3344
3345 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
3346 MODULE_PARM_DESC(tty_major, "Set the major tty number");
3347 module_param(tty_major, int, S_IRUGO | S_IWUSR);
3348
3349 /* disable network interface (eg: insmod hso.ko disable_net=1) */
3350 MODULE_PARM_DESC(disable_net, "Disable the network interface");
3351 module_param(disable_net, int, S_IRUGO | S_IWUSR);