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_INDEX         (0x2)
 189 #define W_LENGTH        (0x2)
 190
 191 #define B_OVERRUN       (0x1<<6)
 192 #define B_PARITY        (0x1<<5)
 193 #define B_FRAMING       (0x1<<4)
 194 #define B_RING_SIGNAL   (0x1<<3)
 195 #define B_BREAK         (0x1<<2)
 196 #define B_TX_CARRIER    (0x1<<1)
 197 #define B_RX_CARRIER    (0x1<<0)
 198
 199 struct hso_serial_state_notification {
 200         u8 bmRequestType;
 201         u8 bNotification;
 202         u16 wValue;
 203         u16 wIndex;
 204         u16 wLength;
 205         u16 UART_state_bitmap;
 206 } __packed;
 207
 208 struct hso_tiocmget {
 209         struct mutex mutex;
 210         wait_queue_head_t waitq;
 211         int    intr_completed;
 212         struct usb_endpoint_descriptor *endp;
 213         struct urb *urb;
 214         struct hso_serial_state_notification serial_state_notification;
 215         u16    prev_UART_state_bitmap;
 216         struct uart_icount icount;
 217 };
 218
 219
 220 struct hso_serial {
 221         struct hso_device *parent;
 222         int magic;
 223         u8 minor;
 224
 225         struct hso_shared_int *shared_int;
 226
 227         /* rx/tx urb could be either a bulk urb or a control urb depending
 228            on which serial port it is used on. */
 229         struct urb *rx_urb[MAX_RX_URBS];
 230         u8 num_rx_urbs;
 231         u8 *rx_data[MAX_RX_URBS];
 232         u16 rx_data_length;     /* should contain allocated length */
 233
 234         struct urb *tx_urb;
 235         u8 *tx_data;
 236         u8 *tx_buffer;
 237         u16 tx_data_length;     /* should contain allocated length */
 238         u16 tx_data_count;
 239         u16 tx_buffer_count;
 240         struct usb_ctrlrequest ctrl_req_tx;
 241         struct usb_ctrlrequest ctrl_req_rx;
 242
 243         struct usb_endpoint_descriptor *in_endp;
 244         struct usb_endpoint_descriptor *out_endp;
 245
 246         enum rx_ctrl_state rx_state;
 247         u8 rts_state;
 248         u8 dtr_state;
 249         unsigned tx_urb_used:1;
 250
 251         struct tty_port port;
 252         /* from usb_serial_port */
 253         spinlock_t serial_lock;
 254
 255         int (*write_data) (struct hso_serial *serial);
 256         struct hso_tiocmget  *tiocmget;
 257         /* Hacks required to get flow control
 258          * working on the serial receive buffers
 259          * so as not to drop characters on the floor.
 260          */
 261         int  curr_rx_urb_idx;
 262         u16  curr_rx_urb_offset;
 263         u8   rx_urb_filled[MAX_RX_URBS];
 264         struct tasklet_struct unthrottle_tasklet;
 265         struct work_struct    retry_unthrottle_workqueue;
 266 };
 267
 268 struct hso_device {
 269         union {
 270                 struct hso_serial *dev_serial;
 271                 struct hso_net *dev_net;
 272         } port_data;
 273
 274         u32 port_spec;
 275
 276         u8 is_active;
 277         u8 usb_gone;
 278         struct work_struct async_get_intf;
 279         struct work_struct async_put_intf;
 280         struct work_struct reset_device;
 281
 282         struct usb_device *usb;
 283         struct usb_interface *interface;
 284
 285         struct device *dev;
 286         struct kref ref;
 287         struct mutex mutex;
 288 };
 289
 290 /* Type of interface */
 291 #define HSO_INTF_MASK           0xFF00
 292 #define HSO_INTF_MUX            0x0100
 293 #define HSO_INTF_BULK           0x0200
 294
 295 /* Type of port */
 296 #define HSO_PORT_MASK           0xFF
 297 #define HSO_PORT_NO_PORT        0x0
 298 #define HSO_PORT_CONTROL        0x1
 299 #define HSO_PORT_APP            0x2
 300 #define HSO_PORT_GPS            0x3
 301 #define HSO_PORT_PCSC           0x4
 302 #define HSO_PORT_APP2           0x5
 303 #define HSO_PORT_GPS_CONTROL    0x6
 304 #define HSO_PORT_MSD            0x7
 305 #define HSO_PORT_VOICE          0x8
 306 #define HSO_PORT_DIAG2          0x9
 307 #define HSO_PORT_DIAG           0x10
 308 #define HSO_PORT_MODEM          0x11
 309 #define HSO_PORT_NETWORK        0x12
 310
 311 /* Additional device info */
 312 #define HSO_INFO_MASK           0xFF000000
 313 #define HSO_INFO_CRC_BUG        0x01000000
 314
 315 /*****************************************************************************/
 316 /* Prototypes                                                                */
 317 /*****************************************************************************/
 318 /* Serial driver functions */
 319 static int hso_serial_tiocmset(struct tty_struct *tty,
 320                                unsigned int set, unsigned int clear);
 321 static void ctrl_callback(struct urb *urb);
 322 static int put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 323 static void hso_kick_transmit(struct hso_serial *serial);
 324 /* Helper functions */
 325 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 326                                    struct usb_device *usb, gfp_t gfp);
 327 static void handle_usb_error(int status, const char *function,
 328                              struct hso_device *hso_dev);
 329 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 330                                                   int type, int dir);
 331 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 332 static void hso_free_interface(struct usb_interface *intf);
 333 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 334 static int hso_stop_serial_device(struct hso_device *hso_dev);
 335 static int hso_start_net_device(struct hso_device *hso_dev);
 336 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 337 static int hso_stop_net_device(struct hso_device *hso_dev);
 338 static void hso_serial_ref_free(struct kref *ref);
 339 static void hso_std_serial_read_bulk_callback(struct urb *urb);
 340 static int hso_mux_serial_read(struct hso_serial *serial);
 341 static void async_get_intf(struct work_struct *data);
 342 static void async_put_intf(struct work_struct *data);
 343 static int hso_put_activity(struct hso_device *hso_dev);
 344 static int hso_get_activity(struct hso_device *hso_dev);
 345 static void tiocmget_intr_callback(struct urb *urb);
 346 static void reset_device(struct work_struct *data);
 347 /*****************************************************************************/
 348 /* Helping functions                                                         */
 349 /*****************************************************************************/
 350
 351 /* #define DEBUG */
 352
 353 static inline struct hso_net *dev2net(struct hso_device *hso_dev)
 354 {
 355         return hso_dev->port_data.dev_net;
 356 }
 357
 358 static inline struct hso_serial *dev2ser(struct hso_device *hso_dev)
 359 {
 360         return hso_dev->port_data.dev_serial;
 361 }
 362
 363 /* Debugging functions */
 364 #ifdef DEBUG
 365 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 366                      unsigned int len)
 367 {
 368         static char name[255];
 369
 370         sprintf(name, "hso[%d:%s]", line_count, func_name);
 371         print_hex_dump_bytes(name, DUMP_PREFIX_NONE, buf, len);
 372 }
 373
 374 #define DUMP(buf_, len_)        \
 375         dbg_dump(__LINE__, __func__, (unsigned char *)buf_, len_)
 376
 377 #define DUMP1(buf_, len_)                       \
 378         do {                                    \
 379                 if (0x01 & debug)               \
 380                         DUMP(buf_, len_);       \
 381         } while (0)
 382 #else
 383 #define DUMP(buf_, len_)
 384 #define DUMP1(buf_, len_)
 385 #endif
 386
 387 /* module parameters */
 388 static int debug;
 389 static int tty_major;
 390 static int disable_net;
 391
 392 /* driver info */
 393 static const char driver_name[] = "hso";
 394 static const char tty_filename[] = "ttyHS";
 395 static const char *version = __FILE__ ": " MOD_AUTHOR;
 396 /* the usb driver itself (registered in hso_init) */
 397 static struct usb_driver hso_driver;
 398 /* serial structures */
 399 static struct tty_driver *tty_drv;
 400 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 401 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 402 static spinlock_t serial_table_lock;
 403
 404 static const s32 default_port_spec[] = {
 405         HSO_INTF_MUX | HSO_PORT_NETWORK,
 406         HSO_INTF_BULK | HSO_PORT_DIAG,
 407         HSO_INTF_BULK | HSO_PORT_MODEM,
 408         0
 409 };
 410
 411 static const s32 icon321_port_spec[] = {
 412         HSO_INTF_MUX | HSO_PORT_NETWORK,
 413         HSO_INTF_BULK | HSO_PORT_DIAG2,
 414         HSO_INTF_BULK | HSO_PORT_MODEM,
 415         HSO_INTF_BULK | HSO_PORT_DIAG,
 416         0
 417 };
 418
 419 #define default_port_device(vendor, product)    \
 420         USB_DEVICE(vendor, product),    \
 421                 .driver_info = (kernel_ulong_t)default_port_spec
 422
 423 #define icon321_port_device(vendor, product)    \
 424         USB_DEVICE(vendor, product),    \
 425                 .driver_info = (kernel_ulong_t)icon321_port_spec
 426
 427 /* list of devices we support */
 428 static const struct usb_device_id hso_ids[] = {
 429         {default_port_device(0x0af0, 0x6711)},
 430         {default_port_device(0x0af0, 0x6731)},
 431         {default_port_device(0x0af0, 0x6751)},
 432         {default_port_device(0x0af0, 0x6771)},
 433         {default_port_device(0x0af0, 0x6791)},
 434         {default_port_device(0x0af0, 0x6811)},
 435         {default_port_device(0x0af0, 0x6911)},
 436         {default_port_device(0x0af0, 0x6951)},
 437         {default_port_device(0x0af0, 0x6971)},
 438         {default_port_device(0x0af0, 0x7011)},
 439         {default_port_device(0x0af0, 0x7031)},
 440         {default_port_device(0x0af0, 0x7051)},
 441         {default_port_device(0x0af0, 0x7071)},
 442         {default_port_device(0x0af0, 0x7111)},
 443         {default_port_device(0x0af0, 0x7211)},
 444         {default_port_device(0x0af0, 0x7251)},
 445         {default_port_device(0x0af0, 0x7271)},
 446         {default_port_device(0x0af0, 0x7311)},
 447         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 448         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 449         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 450         {icon321_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 451         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 452         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 453         {USB_DEVICE(0x0af0, 0x7381)},           /* GE40x */
 454         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 455         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 456         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 457         {USB_DEVICE(0x0af0, 0x7701)},
 458         {USB_DEVICE(0x0af0, 0x7706)},
 459         {USB_DEVICE(0x0af0, 0x7801)},
 460         {USB_DEVICE(0x0af0, 0x7901)},
 461         {USB_DEVICE(0x0af0, 0x7A01)},
 462         {USB_DEVICE(0x0af0, 0x7A05)},
 463         {USB_DEVICE(0x0af0, 0x8200)},
 464         {USB_DEVICE(0x0af0, 0x8201)},
 465         {USB_DEVICE(0x0af0, 0x8300)},
 466         {USB_DEVICE(0x0af0, 0x8302)},
 467         {USB_DEVICE(0x0af0, 0x8304)},
 468         {USB_DEVICE(0x0af0, 0x8400)},
 469         {USB_DEVICE(0x0af0, 0x8600)},
 470         {USB_DEVICE(0x0af0, 0x8800)},
 471         {USB_DEVICE(0x0af0, 0x8900)},
 472         {USB_DEVICE(0x0af0, 0x9000)},
 473         {USB_DEVICE(0x0af0, 0xd035)},
 474         {USB_DEVICE(0x0af0, 0xd055)},
 475         {USB_DEVICE(0x0af0, 0xd155)},
 476         {USB_DEVICE(0x0af0, 0xd255)},
 477         {USB_DEVICE(0x0af0, 0xd057)},
 478         {USB_DEVICE(0x0af0, 0xd157)},
 479         {USB_DEVICE(0x0af0, 0xd257)},
 480         {USB_DEVICE(0x0af0, 0xd357)},
 481         {USB_DEVICE(0x0af0, 0xd058)},
 482         {USB_DEVICE(0x0af0, 0xc100)},
 483         {}
 484 };
 485 MODULE_DEVICE_TABLE(usb, hso_ids);
 486
 487 /* Sysfs attribute */
 488 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 489                                        struct device_attribute *attr,
 490                                        char *buf)
 491 {
 492         struct hso_device *hso_dev = dev_get_drvdata(dev);
 493         char *port_name;
 494
 495         if (!hso_dev)
 496                 return 0;
 497
 498         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 499         case HSO_PORT_CONTROL:
 500                 port_name = "Control";
 501                 break;
 502         case HSO_PORT_APP:
 503                 port_name = "Application";
 504                 break;
 505         case HSO_PORT_APP2:
 506                 port_name = "Application2";
 507                 break;
 508         case HSO_PORT_GPS:
 509                 port_name = "GPS";
 510                 break;
 511         case HSO_PORT_GPS_CONTROL:
 512                 port_name = "GPS Control";
 513                 break;
 514         case HSO_PORT_PCSC:
 515                 port_name = "PCSC";
 516                 break;
 517         case HSO_PORT_DIAG:
 518                 port_name = "Diagnostic";
 519                 break;
 520         case HSO_PORT_DIAG2:
 521                 port_name = "Diagnostic2";
 522                 break;
 523         case HSO_PORT_MODEM:
 524                 port_name = "Modem";
 525                 break;
 526         case HSO_PORT_NETWORK:
 527                 port_name = "Network";
 528                 break;
 529         default:
 530                 port_name = "Unknown";
 531                 break;
 532         }
 533
 534         return sprintf(buf, "%s\n", port_name);
 535 }
 536 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 537
 538 static int hso_urb_to_index(struct hso_serial *serial, struct urb *urb)
 539 {
 540         int idx;
 541
 542         for (idx = 0; idx < serial->num_rx_urbs; idx++)
 543                 if (serial->rx_urb[idx] == urb)
 544                         return idx;
 545         dev_err(serial->parent->dev, "hso_urb_to_index failed\n");
 546         return -1;
 547 }
 548
 549 /* converts mux value to a port spec value */
 550 static u32 hso_mux_to_port(int mux)
 551 {
 552         u32 result;
 553
 554         switch (mux) {
 555         case 0x1:
 556                 result = HSO_PORT_CONTROL;
 557                 break;
 558         case 0x2:
 559                 result = HSO_PORT_APP;
 560                 break;
 561         case 0x4:
 562                 result = HSO_PORT_PCSC;
 563                 break;
 564         case 0x8:
 565                 result = HSO_PORT_GPS;
 566                 break;
 567         case 0x10:
 568                 result = HSO_PORT_APP2;
 569                 break;
 570         default:
 571                 result = HSO_PORT_NO_PORT;
 572         }
 573         return result;
 574 }
 575
 576 /* converts port spec value to a mux value */
 577 static u32 hso_port_to_mux(int port)
 578 {
 579         u32 result;
 580
 581         switch (port & HSO_PORT_MASK) {
 582         case HSO_PORT_CONTROL:
 583                 result = 0x0;
 584                 break;
 585         case HSO_PORT_APP:
 586                 result = 0x1;
 587                 break;
 588         case HSO_PORT_PCSC:
 589                 result = 0x2;
 590                 break;
 591         case HSO_PORT_GPS:
 592                 result = 0x3;
 593                 break;
 594         case HSO_PORT_APP2:
 595                 result = 0x4;
 596                 break;
 597         default:
 598                 result = 0x0;
 599         }
 600         return result;
 601 }
 602
 603 static struct hso_serial *get_serial_by_shared_int_and_type(
 604                                         struct hso_shared_int *shared_int,
 605                                         int mux)
 606 {
 607         int i, port;
 608
 609         port = hso_mux_to_port(mux);
 610
 611         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 612                 if (serial_table[i] &&
 613                     (dev2ser(serial_table[i])->shared_int == shared_int) &&
 614                     ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 615                         return dev2ser(serial_table[i]);
 616                 }
 617         }
 618
 619         return NULL;
 620 }
 621
 622 static struct hso_serial *get_serial_by_index(unsigned index)
 623 {
 624         struct hso_serial *serial = NULL;
 625         unsigned long flags;
 626
 627         spin_lock_irqsave(&serial_table_lock, flags);
 628         if (serial_table[index])
 629                 serial = dev2ser(serial_table[index]);
 630         spin_unlock_irqrestore(&serial_table_lock, flags);
 631
 632         return serial;
 633 }
 634
 635 static int get_free_serial_index(void)
 636 {
 637         int index;
 638         unsigned long flags;
 639
 640         spin_lock_irqsave(&serial_table_lock, flags);
 641         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 642                 if (serial_table[index] == NULL) {
 643                         spin_unlock_irqrestore(&serial_table_lock, flags);
 644                         return index;
 645                 }
 646         }
 647         spin_unlock_irqrestore(&serial_table_lock, flags);
 648
 649         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 650         return -1;
 651 }
 652
 653 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 654 {
 655         unsigned long flags;
 656
 657         spin_lock_irqsave(&serial_table_lock, flags);
 658         if (serial)
 659                 serial_table[index] = serial->parent;
 660         else
 661                 serial_table[index] = NULL;
 662         spin_unlock_irqrestore(&serial_table_lock, flags);
 663 }
 664
 665 static void handle_usb_error(int status, const char *function,
 666                              struct hso_device *hso_dev)
 667 {
 668         char *explanation;
 669
 670         switch (status) {
 671         case -ENODEV:
 672                 explanation = "no device";
 673                 break;
 674         case -ENOENT:
 675                 explanation = "endpoint not enabled";
 676                 break;
 677         case -EPIPE:
 678                 explanation = "endpoint stalled";
 679                 break;
 680         case -ENOSPC:
 681                 explanation = "not enough bandwidth";
 682                 break;
 683         case -ESHUTDOWN:
 684                 explanation = "device disabled";
 685                 break;
 686         case -EHOSTUNREACH:
 687                 explanation = "device suspended";
 688                 break;
 689         case -EINVAL:
 690         case -EAGAIN:
 691         case -EFBIG:
 692         case -EMSGSIZE:
 693                 explanation = "internal error";
 694                 break;
 695         case -EILSEQ:
 696         case -EPROTO:
 697         case -ETIME:
 698         case -ETIMEDOUT:
 699                 explanation = "protocol error";
 700                 if (hso_dev)
 701                         schedule_work(&hso_dev->reset_device);
 702                 break;
 703         default:
 704                 explanation = "unknown status";
 705                 break;
 706         }
 707
 708         /* log a meaningful explanation of an USB status */
 709         D1("%s: received USB status - %s (%d)", function, explanation, status);
 710 }
 711
 712 /* Network interface functions */
 713
 714 /* called when net interface is brought up by ifconfig */
 715 static int hso_net_open(struct net_device *net)
 716 {
 717         struct hso_net *odev = netdev_priv(net);
 718         unsigned long flags = 0;
 719
 720         if (!odev) {
 721                 dev_err(&net->dev, "No net device !\n");
 722                 return -ENODEV;
 723         }
 724
 725         odev->skb_tx_buf = NULL;
 726
 727         /* setup environment */
 728         spin_lock_irqsave(&odev->net_lock, flags);
 729         odev->rx_parse_state = WAIT_IP;
 730         odev->rx_buf_size = 0;
 731         odev->rx_buf_missing = sizeof(struct iphdr);
 732         spin_unlock_irqrestore(&odev->net_lock, flags);
 733
 734         /* We are up and running. */
 735         set_bit(HSO_NET_RUNNING, &odev->flags);
 736         hso_start_net_device(odev->parent);
 737
 738         /* Tell the kernel we are ready to start receiving from it */
 739         netif_start_queue(net);
 740
 741         return 0;
 742 }
 743
 744 /* called when interface is brought down by ifconfig */
 745 static int hso_net_close(struct net_device *net)
 746 {
 747         struct hso_net *odev = netdev_priv(net);
 748
 749         /* we don't need the queue anymore */
 750         netif_stop_queue(net);
 751         /* no longer running */
 752         clear_bit(HSO_NET_RUNNING, &odev->flags);
 753
 754         hso_stop_net_device(odev->parent);
 755
 756         /* done */
 757         return 0;
 758 }
 759
 760 /* USB tells is xmit done, we should start the netqueue again */
 761 static void write_bulk_callback(struct urb *urb)
 762 {
 763         struct hso_net *odev = urb->context;
 764         int status = urb->status;
 765
 766         /* Sanity check */
 767         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 768                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 769                 return;
 770         }
 771
 772         /* Do we still have a valid kernel network device? */
 773         if (!netif_device_present(odev->net)) {
 774                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 775                         __func__);
 776                 return;
 777         }
 778
 779         /* log status, but don't act on it, we don't need to resubmit anything
 780          * anyhow */
 781         if (status)
 782                 handle_usb_error(status, __func__, odev->parent);
 783
 784         hso_put_activity(odev->parent);
 785
 786         /* Tell the network interface we are ready for another frame */
 787         netif_wake_queue(odev->net);
 788 }
 789
 790 /* called by kernel when we need to transmit a packet */
 791 static netdev_tx_t hso_net_start_xmit(struct sk_buff *skb,
 792                                             struct net_device *net)
 793 {
 794         struct hso_net *odev = netdev_priv(net);
 795         int result;
 796
 797         /* Tell the kernel, "No more frames 'til we are done with this one." */
 798         netif_stop_queue(net);
 799         if (hso_get_activity(odev->parent) == -EAGAIN) {
 800                 odev->skb_tx_buf = skb;
 801                 return NETDEV_TX_OK;
 802         }
 803
 804         /* log if asked */
 805         DUMP1(skb->data, skb->len);
 806         /* Copy it from kernel memory to OUR memory */
 807         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 808         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 809
 810         /* Fill in the URB for shipping it out. */
 811         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 812                           odev->parent->usb,
 813                           usb_sndbulkpipe(odev->parent->usb,
 814                                           odev->out_endp->
 815                                           bEndpointAddress & 0x7F),
 816                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 817                           odev);
 818
 819         /* Deal with the Zero Length packet problem, I hope */
 820         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 821
 822         /* Send the URB on its merry way. */
 823         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 824         if (result) {
 825                 dev_warn(&odev->parent->interface->dev,
 826                         "failed mux_bulk_tx_urb %d\n", result);
 827                 net->stats.tx_errors++;
 828                 netif_start_queue(net);
 829         } else {
 830                 net->stats.tx_packets++;
 831                 net->stats.tx_bytes += skb->len;
 832         }
 833         dev_kfree_skb(skb);
 834         /* we're done */
 835         return NETDEV_TX_OK;
 836 }
 837
 838 static const struct ethtool_ops ops = {
 839         .get_link = ethtool_op_get_link
 840 };
 841
 842 /* called when a packet did not ack after watchdogtimeout */
 843 static void hso_net_tx_timeout(struct net_device *net)
 844 {
 845         struct hso_net *odev = netdev_priv(net);
 846
 847         if (!odev)
 848                 return;
 849
 850         /* Tell syslog we are hosed. */
 851         dev_warn(&net->dev, "Tx timed out.\n");
 852
 853         /* Tear the waiting frame off the list */
 854         if (odev->mux_bulk_tx_urb &&
 855             (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 856                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 857
 858         /* Update statistics */
 859         net->stats.tx_errors++;
 860 }
 861
 862 /* make a real packet from the received USB buffer */
 863 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 864                         unsigned int count, unsigned char is_eop)
 865 {
 866         unsigned short temp_bytes;
 867         unsigned short buffer_offset = 0;
 868         unsigned short frame_len;
 869         unsigned char *tmp_rx_buf;
 870
 871         /* log if needed */
 872         D1("Rx %d bytes", count);
 873         DUMP(ip_pkt, min(128, (int)count));
 874
 875         while (count) {
 876                 switch (odev->rx_parse_state) {
 877                 case WAIT_IP:
 878                         /* waiting for IP header. */
 879                         /* wanted bytes - size of ip header */
 880                         temp_bytes =
 881                             (count <
 882                              odev->rx_buf_missing) ? count : odev->
 883                             rx_buf_missing;
 884
 885                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 886                                odev->rx_buf_size, ip_pkt + buffer_offset,
 887                                temp_bytes);
 888
 889                         odev->rx_buf_size += temp_bytes;
 890                         buffer_offset += temp_bytes;
 891                         odev->rx_buf_missing -= temp_bytes;
 892                         count -= temp_bytes;
 893
 894                         if (!odev->rx_buf_missing) {
 895                                 /* header is complete allocate an sk_buffer and
 896                                  * continue to WAIT_DATA */
 897                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 898
 899                                 if ((frame_len > DEFAULT_MRU) ||
 900                                     (frame_len < sizeof(struct iphdr))) {
 901                                         dev_err(&odev->net->dev,
 902                                                 "Invalid frame (%d) length\n",
 903                                                 frame_len);
 904                                         odev->rx_parse_state = WAIT_SYNC;
 905                                         continue;
 906                                 }
 907                                 /* Allocate an sk_buff */
 908                                 odev->skb_rx_buf = netdev_alloc_skb(odev->net,
 909                                                                     frame_len);
 910                                 if (!odev->skb_rx_buf) {
 911                                         /* We got no receive buffer. */
 912                                         D1("could not allocate memory");
 913                                         odev->rx_parse_state = WAIT_SYNC;
 914                                         return;
 915                                 }
 916
 917                                 /* Copy what we got so far. make room for iphdr
 918                                  * after tail. */
 919                                 tmp_rx_buf =
 920                                     skb_put(odev->skb_rx_buf,
 921                                             sizeof(struct iphdr));
 922                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 923                                        sizeof(struct iphdr));
 924
 925                                 /* ETH_HLEN */
 926                                 odev->rx_buf_size = sizeof(struct iphdr);
 927
 928                                 /* Filip actually use .tot_len */
 929                                 odev->rx_buf_missing =
 930                                     frame_len - sizeof(struct iphdr);
 931                                 odev->rx_parse_state = WAIT_DATA;
 932                         }
 933                         break;
 934
 935                 case WAIT_DATA:
 936                         temp_bytes = (count < odev->rx_buf_missing)
 937                                         ? count : odev->rx_buf_missing;
 938
 939                         /* Copy the rest of the bytes that are left in the
 940                          * buffer into the waiting sk_buf. */
 941                         /* Make room for temp_bytes after tail. */
 942                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 943                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 944
 945                         odev->rx_buf_missing -= temp_bytes;
 946                         count -= temp_bytes;
 947                         buffer_offset += temp_bytes;
 948                         odev->rx_buf_size += temp_bytes;
 949                         if (!odev->rx_buf_missing) {
 950                                 /* Packet is complete. Inject into stack. */
 951                                 /* We have IP packet here */
 952                                 odev->skb_rx_buf->protocol = cpu_to_be16(ETH_P_IP);
 953                                 skb_reset_mac_header(odev->skb_rx_buf);
 954
 955                                 /* Ship it off to the kernel */
 956                                 netif_rx(odev->skb_rx_buf);
 957                                 /* No longer our buffer. */
 958                                 odev->skb_rx_buf = NULL;
 959
 960                                 /* update out statistics */
 961                                 odev->net->stats.rx_packets++;
 962
 963                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 964
 965                                 odev->rx_buf_size = 0;
 966                                 odev->rx_buf_missing = sizeof(struct iphdr);
 967                                 odev->rx_parse_state = WAIT_IP;
 968                         }
 969                         break;
 970
 971                 case WAIT_SYNC:
 972                         D1(" W_S");
 973                         count = 0;
 974                         break;
 975                 default:
 976                         D1(" ");
 977                         count--;
 978                         break;
 979                 }
 980         }
 981
 982         /* Recovery mechanism for WAIT_SYNC state. */
 983         if (is_eop) {
 984                 if (odev->rx_parse_state == WAIT_SYNC) {
 985                         odev->rx_parse_state = WAIT_IP;
 986                         odev->rx_buf_size = 0;
 987                         odev->rx_buf_missing = sizeof(struct iphdr);
 988                 }
 989         }
 990 }
 991
 992 static void fix_crc_bug(struct urb *urb, __le16 max_packet_size)
 993 {
 994         static const u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
 995         u32 rest = urb->actual_length % le16_to_cpu(max_packet_size);
 996
 997         if (((rest == 5) || (rest == 6)) &&
 998             !memcmp(((u8 *)urb->transfer_buffer) + urb->actual_length - 4,
 999                     crc_check, 4)) {
1000                 urb->actual_length -= 4;
1001         }
1002 }
1003
1004 /* Moving data from usb to kernel (in interrupt state) */
1005 static void read_bulk_callback(struct urb *urb)
1006 {
1007         struct hso_net *odev = urb->context;
1008         struct net_device *net;
1009         int result;
1010         int status = urb->status;
1011
1012         /* is al ok?  (Filip: Who's Al ?) */
1013         if (status) {
1014                 handle_usb_error(status, __func__, odev->parent);
1015                 return;
1016         }
1017
1018         /* Sanity check */
1019         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
1020                 D1("BULK IN callback but driver is not active!");
1021                 return;
1022         }
1023         usb_mark_last_busy(urb->dev);
1024
1025         net = odev->net;
1026
1027         if (!netif_device_present(net)) {
1028                 /* Somebody killed our network interface... */
1029                 return;
1030         }
1031
1032         if (odev->parent->port_spec & HSO_INFO_CRC_BUG)
1033                 fix_crc_bug(urb, odev->in_endp->wMaxPacketSize);
1034
1035         /* do we even have a packet? */
1036         if (urb->actual_length) {
1037                 /* Handle the IP stream, add header and push it onto network
1038                  * stack if the packet is complete. */
1039                 spin_lock(&odev->net_lock);
1040                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
1041                             (urb->transfer_buffer_length >
1042                              urb->actual_length) ? 1 : 0);
1043                 spin_unlock(&odev->net_lock);
1044         }
1045
1046         /* We are done with this URB, resubmit it. Prep the USB to wait for
1047          * another frame. Reuse same as received. */
1048         usb_fill_bulk_urb(urb,
1049                           odev->parent->usb,
1050                           usb_rcvbulkpipe(odev->parent->usb,
1051                                           odev->in_endp->
1052                                           bEndpointAddress & 0x7F),
1053                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
1054                           read_bulk_callback, odev);
1055
1056         /* Give this to the USB subsystem so it can tell us when more data
1057          * arrives. */
1058         result = usb_submit_urb(urb, GFP_ATOMIC);
1059         if (result)
1060                 dev_warn(&odev->parent->interface->dev,
1061                          "%s failed submit mux_bulk_rx_urb %d\n", __func__,
1062                          result);
1063 }
1064
1065 /* Serial driver functions */
1066
1067 static void hso_init_termios(struct ktermios *termios)
1068 {
1069         /*
1070          * The default requirements for this device are:
1071          */
1072         termios->c_iflag &=
1073                 ~(IGNBRK        /* disable ignore break */
1074                 | BRKINT        /* disable break causes interrupt */
1075                 | PARMRK        /* disable mark parity errors */
1076                 | ISTRIP        /* disable clear high bit of input characters */
1077                 | INLCR         /* disable translate NL to CR */
1078                 | IGNCR         /* disable ignore CR */
1079                 | ICRNL         /* disable translate CR to NL */
1080                 | IXON);        /* disable enable XON/XOFF flow control */
1081
1082         /* disable postprocess output characters */
1083         termios->c_oflag &= ~OPOST;
1084
1085         termios->c_lflag &=
1086                 ~(ECHO          /* disable echo input characters */
1087                 | ECHONL        /* disable echo new line */
1088                 | ICANON        /* disable erase, kill, werase, and rprnt
1089                                    special characters */
1090                 | ISIG          /* disable interrupt, quit, and suspend special
1091                                    characters */
1092                 | IEXTEN);      /* disable non-POSIX special characters */
1093
1094         termios->c_cflag &=
1095                 ~(CSIZE         /* no size */
1096                 | PARENB        /* disable parity bit */
1097                 | CBAUD         /* clear current baud rate */
1098                 | CBAUDEX);     /* clear current buad rate */
1099
1100         termios->c_cflag |= CS8;        /* character size 8 bits */
1101
1102         /* baud rate 115200 */
1103         tty_termios_encode_baud_rate(termios, 115200, 115200);
1104 }
1105
1106 static void _hso_serial_set_termios(struct tty_struct *tty,
1107                                     struct ktermios *old)
1108 {
1109         struct hso_serial *serial = tty->driver_data;
1110
1111         if (!serial) {
1112                 printk(KERN_ERR "%s: no tty structures", __func__);
1113                 return;
1114         }
1115
1116         D4("port %d", serial->minor);
1117
1118         /*
1119          *      Fix up unsupported bits
1120          */
1121         tty->termios.c_iflag &= ~IXON; /* disable enable XON/XOFF flow control */
1122
1123         tty->termios.c_cflag &=
1124                 ~(CSIZE         /* no size */
1125                 | PARENB        /* disable parity bit */
1126                 | CBAUD         /* clear current baud rate */
1127                 | CBAUDEX);     /* clear current buad rate */
1128
1129         tty->termios.c_cflag |= CS8;    /* character size 8 bits */
1130
1131         /* baud rate 115200 */
1132         tty_encode_baud_rate(tty, 115200, 115200);
1133 }
1134
1135 static void hso_resubmit_rx_bulk_urb(struct hso_serial *serial, struct urb *urb)
1136 {
1137         int result;
1138         /* We are done with this URB, resubmit it. Prep the USB to wait for
1139          * another frame */
1140         usb_fill_bulk_urb(urb, serial->parent->usb,
1141                           usb_rcvbulkpipe(serial->parent->usb,
1142                                           serial->in_endp->
1143                                           bEndpointAddress & 0x7F),
1144                           urb->transfer_buffer, serial->rx_data_length,
1145                           hso_std_serial_read_bulk_callback, serial);
1146         /* Give this to the USB subsystem so it can tell us when more data
1147          * arrives. */
1148         result = usb_submit_urb(urb, GFP_ATOMIC);
1149         if (result) {
1150                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d\n",
1151                         __func__, result);
1152         }
1153 }
1154
1155
1156
1157
1158 static void put_rxbuf_data_and_resubmit_bulk_urb(struct hso_serial *serial)
1159 {
1160         int count;
1161         struct urb *curr_urb;
1162
1163         while (serial->rx_urb_filled[serial->curr_rx_urb_idx]) {
1164                 curr_urb = serial->rx_urb[serial->curr_rx_urb_idx];
1165                 count = put_rxbuf_data(curr_urb, serial);
1166                 if (count == -1)
1167                         return;
1168                 if (count == 0) {
1169                         serial->curr_rx_urb_idx++;
1170                         if (serial->curr_rx_urb_idx >= serial->num_rx_urbs)
1171                                 serial->curr_rx_urb_idx = 0;
1172                         hso_resubmit_rx_bulk_urb(serial, curr_urb);
1173                 }
1174         }
1175 }
1176
1177 static void put_rxbuf_data_and_resubmit_ctrl_urb(struct hso_serial *serial)
1178 {
1179         int count = 0;
1180         struct urb *urb;
1181
1182         urb = serial->rx_urb[0];
1183         if (serial->port.count > 0) {
1184                 count = put_rxbuf_data(urb, serial);
1185                 if (count == -1)
1186                         return;
1187         }
1188         /* Re issue a read as long as we receive data. */
1189
1190         if (count == 0 && ((urb->actual_length != 0) ||
1191                            (serial->rx_state == RX_PENDING))) {
1192                 serial->rx_state = RX_SENT;
1193                 hso_mux_serial_read(serial);
1194         } else
1195                 serial->rx_state = RX_IDLE;
1196 }
1197
1198
1199 /* read callback for Diag and CS port */
1200 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1201 {
1202         struct hso_serial *serial = urb->context;
1203         int status = urb->status;
1204
1205         /* sanity check */
1206         if (!serial) {
1207                 D1("serial == NULL");
1208                 return;
1209         } else if (status) {
1210                 handle_usb_error(status, __func__, serial->parent);
1211                 return;
1212         }
1213
1214         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1215         D1("Actual length = %d\n", urb->actual_length);
1216         DUMP1(urb->transfer_buffer, urb->actual_length);
1217
1218         /* Anyone listening? */
1219         if (serial->port.count == 0)
1220                 return;
1221
1222         if (status == 0) {
1223                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG)
1224                         fix_crc_bug(urb, serial->in_endp->wMaxPacketSize);
1225                 /* Valid data, handle RX data */
1226                 spin_lock(&serial->serial_lock);
1227                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 1;
1228                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1229                 spin_unlock(&serial->serial_lock);
1230         } else if (status == -ENOENT || status == -ECONNRESET) {
1231                 /* Unlinked - check for throttled port. */
1232                 D2("Port %d, successfully unlinked urb", serial->minor);
1233                 spin_lock(&serial->serial_lock);
1234                 serial->rx_urb_filled[hso_urb_to_index(serial, urb)] = 0;
1235                 hso_resubmit_rx_bulk_urb(serial, urb);
1236                 spin_unlock(&serial->serial_lock);
1237         } else {
1238                 D2("Port %d, status = %d for read urb", serial->minor, status);
1239                 return;
1240         }
1241 }
1242
1243 /*
1244  * This needs to be a tasklet otherwise we will
1245  * end up recursively calling this function.
1246  */
1247 static void hso_unthrottle_tasklet(struct hso_serial *serial)
1248 {
1249         unsigned long flags;
1250
1251         spin_lock_irqsave(&serial->serial_lock, flags);
1252         if ((serial->parent->port_spec & HSO_INTF_MUX))
1253                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
1254         else
1255                 put_rxbuf_data_and_resubmit_bulk_urb(serial);
1256         spin_unlock_irqrestore(&serial->serial_lock, flags);
1257 }
1258
1259 static  void hso_unthrottle(struct tty_struct *tty)
1260 {
1261         struct hso_serial *serial = tty->driver_data;
1262
1263         tasklet_hi_schedule(&serial->unthrottle_tasklet);
1264 }
1265
1266 static void hso_unthrottle_workfunc(struct work_struct *work)
1267 {
1268         struct hso_serial *serial =
1269             container_of(work, struct hso_serial,
1270                          retry_unthrottle_workqueue);
1271         hso_unthrottle_tasklet(serial);
1272 }
1273
1274 /* open the requested serial port */
1275 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1276 {
1277         struct hso_serial *serial = get_serial_by_index(tty->index);
1278         int result;
1279
1280         /* sanity check */
1281         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1282                 WARN_ON(1);
1283                 tty->driver_data = NULL;
1284                 D1("Failed to open port");
1285                 return -ENODEV;
1286         }
1287
1288         mutex_lock(&serial->parent->mutex);
1289         result = usb_autopm_get_interface(serial->parent->interface);
1290         if (result < 0)
1291                 goto err_out;
1292
1293         D1("Opening %d", serial->minor);
1294         kref_get(&serial->parent->ref);
1295
1296         /* setup */
1297         tty->driver_data = serial;
1298         tty_port_tty_set(&serial->port, tty);
1299
1300         /* check for port already opened, if not set the termios */
1301         serial->port.count++;
1302         if (serial->port.count == 1) {
1303                 serial->rx_state = RX_IDLE;
1304                 /* Force default termio settings */
1305                 _hso_serial_set_termios(tty, NULL);
1306                 tasklet_init(&serial->unthrottle_tasklet,
1307                              (void (*)(unsigned long))hso_unthrottle_tasklet,
1308                              (unsigned long)serial);
1309                 INIT_WORK(&serial->retry_unthrottle_workqueue,
1310                           hso_unthrottle_workfunc);
1311                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1312                 if (result) {
1313                         hso_stop_serial_device(serial->parent);
1314                         serial->port.count--;
1315                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1316                 }
1317         } else {
1318                 D1("Port was already open");
1319         }
1320
1321         usb_autopm_put_interface(serial->parent->interface);
1322
1323         /* done */
1324         if (result)
1325                 hso_serial_tiocmset(tty, TIOCM_RTS | TIOCM_DTR, 0);
1326 err_out:
1327         mutex_unlock(&serial->parent->mutex);
1328         return result;
1329 }
1330
1331 /* close the requested serial port */
1332 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1333 {
1334         struct hso_serial *serial = tty->driver_data;
1335         u8 usb_gone;
1336
1337         D1("Closing serial port");
1338
1339         /* Open failed, no close cleanup required */
1340         if (serial == NULL)
1341                 return;
1342
1343         mutex_lock(&serial->parent->mutex);
1344         usb_gone = serial->parent->usb_gone;
1345
1346         if (!usb_gone)
1347                 usb_autopm_get_interface(serial->parent->interface);
1348
1349         /* reset the rts and dtr */
1350         /* do the actual close */
1351         serial->port.count--;
1352
1353         if (serial->port.count <= 0) {
1354                 serial->port.count = 0;
1355                 tty_port_tty_set(&serial->port, NULL);
1356                 if (!usb_gone)
1357                         hso_stop_serial_device(serial->parent);
1358                 tasklet_kill(&serial->unthrottle_tasklet);
1359                 cancel_work_sync(&serial->retry_unthrottle_workqueue);
1360         }
1361
1362         if (!usb_gone)
1363                 usb_autopm_put_interface(serial->parent->interface);
1364
1365         mutex_unlock(&serial->parent->mutex);
1366
1367         kref_put(&serial->parent->ref, hso_serial_ref_free);
1368 }
1369
1370 /* close the requested serial port */
1371 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1372                             int count)
1373 {
1374         struct hso_serial *serial = tty->driver_data;
1375         int space, tx_bytes;
1376         unsigned long flags;
1377
1378         /* sanity check */
1379         if (serial == NULL) {
1380                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1381                 return -ENODEV;
1382         }
1383
1384         spin_lock_irqsave(&serial->serial_lock, flags);
1385
1386         space = serial->tx_data_length - serial->tx_buffer_count;
1387         tx_bytes = (count < space) ? count : space;
1388
1389         if (!tx_bytes)
1390                 goto out;
1391
1392         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1393         serial->tx_buffer_count += tx_bytes;
1394
1395 out:
1396         spin_unlock_irqrestore(&serial->serial_lock, flags);
1397
1398         hso_kick_transmit(serial);
1399         /* done */
1400         return tx_bytes;
1401 }
1402
1403 /* how much room is there for writing */
1404 static int hso_serial_write_room(struct tty_struct *tty)
1405 {
1406         struct hso_serial *serial = tty->driver_data;
1407         int room;
1408         unsigned long flags;
1409
1410         spin_lock_irqsave(&serial->serial_lock, flags);
1411         room = serial->tx_data_length - serial->tx_buffer_count;
1412         spin_unlock_irqrestore(&serial->serial_lock, flags);
1413
1414         /* return free room */
1415         return room;
1416 }
1417
1418 /* setup the term */
1419 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1420 {
1421         struct hso_serial *serial = tty->driver_data;
1422         unsigned long flags;
1423
1424         if (old)
1425                 D5("Termios called with: cflags new[%d] - old[%d]",
1426                    tty->termios.c_cflag, old->c_cflag);
1427
1428         /* the actual setup */
1429         spin_lock_irqsave(&serial->serial_lock, flags);
1430         if (serial->port.count)
1431                 _hso_serial_set_termios(tty, old);
1432         else
1433                 tty->termios = *old;
1434         spin_unlock_irqrestore(&serial->serial_lock, flags);
1435
1436         /* done */
1437 }
1438
1439 /* how many characters in the buffer */
1440 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1441 {
1442         struct hso_serial *serial = tty->driver_data;
1443         int chars;
1444         unsigned long flags;
1445
1446         /* sanity check */
1447         if (serial == NULL)
1448                 return 0;
1449
1450         spin_lock_irqsave(&serial->serial_lock, flags);
1451         chars = serial->tx_buffer_count;
1452         spin_unlock_irqrestore(&serial->serial_lock, flags);
1453
1454         return chars;
1455 }
1456 static int tiocmget_submit_urb(struct hso_serial *serial,
1457                                struct hso_tiocmget *tiocmget,
1458                                struct usb_device *usb)
1459 {
1460         int result;
1461
1462         if (serial->parent->usb_gone)
1463                 return -ENODEV;
1464         usb_fill_int_urb(tiocmget->urb, usb,
1465                          usb_rcvintpipe(usb,
1466                                         tiocmget->endp->
1467                                         bEndpointAddress & 0x7F),
1468                          &tiocmget->serial_state_notification,
1469                          sizeof(struct hso_serial_state_notification),
1470                          tiocmget_intr_callback, serial,
1471                          tiocmget->endp->bInterval);
1472         result = usb_submit_urb(tiocmget->urb, GFP_ATOMIC);
1473         if (result) {
1474                 dev_warn(&usb->dev, "%s usb_submit_urb failed %d\n", __func__,
1475                          result);
1476         }
1477         return result;
1478
1479 }
1480
1481 static void tiocmget_intr_callback(struct urb *urb)
1482 {
1483         struct hso_serial *serial = urb->context;
1484         struct hso_tiocmget *tiocmget;
1485         int status = urb->status;
1486         u16 UART_state_bitmap, prev_UART_state_bitmap;
1487         struct uart_icount *icount;
1488         struct hso_serial_state_notification *serial_state_notification;
1489         struct usb_device *usb;
1490
1491         /* Sanity checks */
1492         if (!serial)
1493                 return;
1494         if (status) {
1495                 handle_usb_error(status, __func__, serial->parent);
1496                 return;
1497         }
1498         tiocmget = serial->tiocmget;
1499         if (!tiocmget)
1500                 return;
1501         usb = serial->parent->usb;
1502         serial_state_notification = &tiocmget->serial_state_notification;
1503         if (serial_state_notification->bmRequestType != BM_REQUEST_TYPE ||
1504             serial_state_notification->bNotification != B_NOTIFICATION ||
1505             le16_to_cpu(serial_state_notification->wValue) != W_VALUE ||
1506             le16_to_cpu(serial_state_notification->wIndex) != W_INDEX ||
1507             le16_to_cpu(serial_state_notification->wLength) != W_LENGTH) {
1508                 dev_warn(&usb->dev,
1509                          "hso received invalid serial state notification\n");
1510                 DUMP(serial_state_notification,
1511                      sizeof(struct hso_serial_state_notification));
1512         } else {
1513
1514                 UART_state_bitmap = le16_to_cpu(serial_state_notification->
1515                                                 UART_state_bitmap);
1516                 prev_UART_state_bitmap = tiocmget->prev_UART_state_bitmap;
1517                 icount = &tiocmget->icount;
1518                 spin_lock(&serial->serial_lock);
1519                 if ((UART_state_bitmap & B_OVERRUN) !=
1520                    (prev_UART_state_bitmap & B_OVERRUN))
1521                         icount->parity++;
1522                 if ((UART_state_bitmap & B_PARITY) !=
1523                    (prev_UART_state_bitmap & B_PARITY))
1524                         icount->parity++;
1525                 if ((UART_state_bitmap & B_FRAMING) !=
1526                    (prev_UART_state_bitmap & B_FRAMING))
1527                         icount->frame++;
1528                 if ((UART_state_bitmap & B_RING_SIGNAL) &&
1529                    !(prev_UART_state_bitmap & B_RING_SIGNAL))
1530                         icount->rng++;
1531                 if ((UART_state_bitmap & B_BREAK) !=
1532                    (prev_UART_state_bitmap & B_BREAK))
1533                         icount->brk++;
1534                 if ((UART_state_bitmap & B_TX_CARRIER) !=
1535                    (prev_UART_state_bitmap & B_TX_CARRIER))
1536                         icount->dsr++;
1537                 if ((UART_state_bitmap & B_RX_CARRIER) !=
1538                    (prev_UART_state_bitmap & B_RX_CARRIER))
1539                         icount->dcd++;
1540                 tiocmget->prev_UART_state_bitmap = UART_state_bitmap;
1541                 spin_unlock(&serial->serial_lock);
1542                 tiocmget->intr_completed = 1;
1543                 wake_up_interruptible(&tiocmget->waitq);
1544         }
1545         memset(serial_state_notification, 0,
1546                sizeof(struct hso_serial_state_notification));
1547         tiocmget_submit_urb(serial,
1548                             tiocmget,
1549                             serial->parent->usb);
1550 }
1551
1552 /*
1553  * next few functions largely stolen from drivers/serial/serial_core.c
1554  */
1555 /* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1556  * - mask passed in arg for lines of interest
1557  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1558  * Caller should use TIOCGICOUNT to see which one it was
1559  */
1560 static int
1561 hso_wait_modem_status(struct hso_serial *serial, unsigned long arg)
1562 {
1563         DECLARE_WAITQUEUE(wait, current);
1564         struct uart_icount cprev, cnow;
1565         struct hso_tiocmget  *tiocmget;
1566         int ret;
1567
1568         tiocmget = serial->tiocmget;
1569         if (!tiocmget)
1570                 return -ENOENT;
1571         /*
1572          * note the counters on entry
1573          */
1574         spin_lock_irq(&serial->serial_lock);
1575         memcpy(&cprev, &tiocmget->icount, sizeof(struct uart_icount));
1576         spin_unlock_irq(&serial->serial_lock);
1577         add_wait_queue(&tiocmget->waitq, &wait);
1578         for (;;) {
1579                 spin_lock_irq(&serial->serial_lock);
1580                 memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1581                 spin_unlock_irq(&serial->serial_lock);
1582                 set_current_state(TASK_INTERRUPTIBLE);
1583                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1584                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1585                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd))) {
1586                         ret = 0;
1587                         break;
1588                 }
1589                 schedule();
1590                 /* see if a signal did it */
1591                 if (signal_pending(current)) {
1592                         ret = -ERESTARTSYS;
1593                         break;
1594                 }
1595                 cprev = cnow;
1596         }
1597         current->state = TASK_RUNNING;
1598         remove_wait_queue(&tiocmget->waitq, &wait);
1599
1600         return ret;
1601 }
1602
1603 /*
1604  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1605  * Return: write counters to the user passed counter struct
1606  * NB: both 1->0 and 0->1 transitions are counted except for
1607  *     RI where only 0->1 is counted.
1608  */
1609 static int hso_get_count(struct tty_struct *tty,
1610                   struct serial_icounter_struct *icount)
1611 {
1612         struct uart_icount cnow;
1613         struct hso_serial *serial = tty->driver_data;
1614         struct hso_tiocmget  *tiocmget = serial->tiocmget;
1615
1616         memset(icount, 0, sizeof(struct serial_icounter_struct));
1617
1618         if (!tiocmget)
1619                  return -ENOENT;
1620         spin_lock_irq(&serial->serial_lock);
1621         memcpy(&cnow, &tiocmget->icount, sizeof(struct uart_icount));
1622         spin_unlock_irq(&serial->serial_lock);
1623
1624         icount->cts         = cnow.cts;
1625         icount->dsr         = cnow.dsr;
1626         icount->rng         = cnow.rng;
1627         icount->dcd         = cnow.dcd;
1628         icount->rx          = cnow.rx;
1629         icount->tx          = cnow.tx;
1630         icount->frame       = cnow.frame;
1631         icount->overrun     = cnow.overrun;
1632         icount->parity      = cnow.parity;
1633         icount->brk         = cnow.brk;
1634         icount->buf_overrun = cnow.buf_overrun;
1635
1636         return 0;
1637 }
1638
1639
1640 static int hso_serial_tiocmget(struct tty_struct *tty)
1641 {
1642         int retval;
1643         struct hso_serial *serial = tty->driver_data;
1644         struct hso_tiocmget  *tiocmget;
1645         u16 UART_state_bitmap;
1646
1647         /* sanity check */
1648         if (!serial) {
1649                 D1("no tty structures");
1650                 return -EINVAL;
1651         }
1652         spin_lock_irq(&serial->serial_lock);
1653         retval = ((serial->rts_state) ? TIOCM_RTS : 0) |
1654             ((serial->dtr_state) ? TIOCM_DTR : 0);
1655         tiocmget = serial->tiocmget;
1656         if (tiocmget) {
1657
1658                 UART_state_bitmap = le16_to_cpu(
1659                         tiocmget->prev_UART_state_bitmap);
1660                 if (UART_state_bitmap & B_RING_SIGNAL)
1661                         retval |=  TIOCM_RNG;
1662                 if (UART_state_bitmap & B_RX_CARRIER)
1663                         retval |=  TIOCM_CD;
1664                 if (UART_state_bitmap & B_TX_CARRIER)
1665                         retval |=  TIOCM_DSR;
1666         }
1667         spin_unlock_irq(&serial->serial_lock);
1668         return retval;
1669 }
1670
1671 static int hso_serial_tiocmset(struct tty_struct *tty,
1672                                unsigned int set, unsigned int clear)
1673 {
1674         int val = 0;
1675         unsigned long flags;
1676         int if_num;
1677         struct hso_serial *serial = tty->driver_data;
1678
1679         /* sanity check */
1680         if (!serial) {
1681                 D1("no tty structures");
1682                 return -EINVAL;
1683         }
1684
1685         if ((serial->parent->port_spec & HSO_PORT_MASK) != HSO_PORT_MODEM)
1686                 return -EINVAL;
1687
1688         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1689
1690         spin_lock_irqsave(&serial->serial_lock, flags);
1691         if (set & TIOCM_RTS)
1692                 serial->rts_state = 1;
1693         if (set & TIOCM_DTR)
1694                 serial->dtr_state = 1;
1695
1696         if (clear & TIOCM_RTS)
1697                 serial->rts_state = 0;
1698         if (clear & TIOCM_DTR)
1699                 serial->dtr_state = 0;
1700
1701         if (serial->dtr_state)
1702                 val |= 0x01;
1703         if (serial->rts_state)
1704                 val |= 0x02;
1705
1706         spin_unlock_irqrestore(&serial->serial_lock, flags);
1707
1708         return usb_control_msg(serial->parent->usb,
1709                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1710                                0x21, val, if_num, NULL, 0,
1711                                USB_CTRL_SET_TIMEOUT);
1712 }
1713
1714 static int hso_serial_ioctl(struct tty_struct *tty,
1715                             unsigned int cmd, unsigned long arg)
1716 {
1717         struct hso_serial *serial = tty->driver_data;
1718         int ret = 0;
1719         D4("IOCTL cmd: %d, arg: %ld", cmd, arg);
1720
1721         if (!serial)
1722                 return -ENODEV;
1723         switch (cmd) {
1724         case TIOCMIWAIT:
1725                 ret = hso_wait_modem_status(serial, arg);
1726                 break;
1727         default:
1728                 ret = -ENOIOCTLCMD;
1729                 break;
1730         }
1731         return ret;
1732 }
1733
1734
1735 /* starts a transmit */
1736 static void hso_kick_transmit(struct hso_serial *serial)
1737 {
1738         u8 *temp;
1739         unsigned long flags;
1740         int res;
1741
1742         spin_lock_irqsave(&serial->serial_lock, flags);
1743         if (!serial->tx_buffer_count)
1744                 goto out;
1745
1746         if (serial->tx_urb_used)
1747                 goto out;
1748
1749         /* Wakeup USB interface if necessary */
1750         if (hso_get_activity(serial->parent) == -EAGAIN)
1751                 goto out;
1752
1753         /* Switch pointers around to avoid memcpy */
1754         temp = serial->tx_buffer;
1755         serial->tx_buffer = serial->tx_data;
1756         serial->tx_data = temp;
1757         serial->tx_data_count = serial->tx_buffer_count;
1758         serial->tx_buffer_count = 0;
1759
1760         /* If temp is set, it means we switched buffers */
1761         if (temp && serial->write_data) {
1762                 res = serial->write_data(serial);
1763                 if (res >= 0)
1764                         serial->tx_urb_used = 1;
1765         }
1766 out:
1767         spin_unlock_irqrestore(&serial->serial_lock, flags);
1768 }
1769
1770 /* make a request (for reading and writing data to muxed serial port) */
1771 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1772                               struct urb *ctrl_urb,
1773                               struct usb_ctrlrequest *ctrl_req,
1774                               u8 *ctrl_urb_data, u32 size)
1775 {
1776         int result;
1777         int pipe;
1778
1779         /* Sanity check */
1780         if (!serial || !ctrl_urb || !ctrl_req) {
1781                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1782                 return -EINVAL;
1783         }
1784
1785         /* initialize */
1786         ctrl_req->wValue = 0;
1787         ctrl_req->wIndex = cpu_to_le16(hso_port_to_mux(port));
1788         ctrl_req->wLength = cpu_to_le16(size);
1789
1790         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1791                 /* Reading command */
1792                 ctrl_req->bRequestType = USB_DIR_IN |
1793                                          USB_TYPE_OPTION_VENDOR |
1794                                          USB_RECIP_INTERFACE;
1795                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1796                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1797         } else {
1798                 /* Writing command */
1799                 ctrl_req->bRequestType = USB_DIR_OUT |
1800                                          USB_TYPE_OPTION_VENDOR |
1801                                          USB_RECIP_INTERFACE;
1802                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1803                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1804         }
1805         /* syslog */
1806         D2("%s command (%02x) len: %d, port: %d",
1807            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1808            ctrl_req->bRequestType, ctrl_req->wLength, port);
1809
1810         /* Load ctrl urb */
1811         ctrl_urb->transfer_flags = 0;
1812         usb_fill_control_urb(ctrl_urb,
1813                              serial->parent->usb,
1814                              pipe,
1815                              (u8 *) ctrl_req,
1816                              ctrl_urb_data, size, ctrl_callback, serial);
1817         /* Send it on merry way */
1818         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1819         if (result) {
1820                 dev_err(&ctrl_urb->dev->dev,
1821                         "%s failed submit ctrl_urb %d type %d\n", __func__,
1822                         result, type);
1823                 return result;
1824         }
1825
1826         /* done */
1827         return size;
1828 }
1829
1830 /* called by intr_callback when read occurs */
1831 static int hso_mux_serial_read(struct hso_serial *serial)
1832 {
1833         if (!serial)
1834                 return -EINVAL;
1835
1836         /* clean data */
1837         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1838         /* make the request */
1839
1840         if (serial->num_rx_urbs != 1) {
1841                 dev_err(&serial->parent->interface->dev,
1842                         "ERROR: mux'd reads with multiple buffers "
1843                         "not possible\n");
1844                 return 0;
1845         }
1846         return mux_device_request(serial,
1847                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1848                                   serial->parent->port_spec & HSO_PORT_MASK,
1849                                   serial->rx_urb[0],
1850                                   &serial->ctrl_req_rx,
1851                                   serial->rx_data[0], serial->rx_data_length);
1852 }
1853
1854 /* used for muxed serial port callback (muxed serial read) */
1855 static void intr_callback(struct urb *urb)
1856 {
1857         struct hso_shared_int *shared_int = urb->context;
1858         struct hso_serial *serial;
1859         unsigned char *port_req;
1860         int status = urb->status;
1861         int i;
1862
1863         usb_mark_last_busy(urb->dev);
1864
1865         /* sanity check */
1866         if (!shared_int)
1867                 return;
1868
1869         /* status check */
1870         if (status) {
1871                 handle_usb_error(status, __func__, NULL);
1872                 return;
1873         }
1874         D4("\n--- Got intr callback 0x%02X ---", status);
1875
1876         /* what request? */
1877         port_req = urb->transfer_buffer;
1878         D4(" port_req = 0x%.2X\n", *port_req);
1879         /* loop over all muxed ports to find the one sending this */
1880         for (i = 0; i < 8; i++) {
1881                 /* max 8 channels on MUX */
1882                 if (*port_req & (1 << i)) {
1883                         serial = get_serial_by_shared_int_and_type(shared_int,
1884                                                                    (1 << i));
1885                         if (serial != NULL) {
1886                                 D1("Pending read interrupt on port %d\n", i);
1887                                 spin_lock(&serial->serial_lock);
1888                                 if (serial->rx_state == RX_IDLE &&
1889                                         serial->port.count > 0) {
1890                                         /* Setup and send a ctrl req read on
1891                                          * port i */
1892                                         if (!serial->rx_urb_filled[0]) {
1893                                                 serial->rx_state = RX_SENT;
1894                                                 hso_mux_serial_read(serial);
1895                                         } else
1896                                                 serial->rx_state = RX_PENDING;
1897                                 } else {
1898                                         D1("Already a read pending on "
1899                                            "port %d or port not open\n", i);
1900                                 }
1901                                 spin_unlock(&serial->serial_lock);
1902                         }
1903                 }
1904         }
1905         /* Resubmit interrupt urb */
1906         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1907 }
1908
1909 /* called for writing to muxed serial port */
1910 static int hso_mux_serial_write_data(struct hso_serial *serial)
1911 {
1912         if (NULL == serial)
1913                 return -EINVAL;
1914
1915         return mux_device_request(serial,
1916                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1917                                   serial->parent->port_spec & HSO_PORT_MASK,
1918                                   serial->tx_urb,
1919                                   &serial->ctrl_req_tx,
1920                                   serial->tx_data, serial->tx_data_count);
1921 }
1922
1923 /* write callback for Diag and CS port */
1924 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1925 {
1926         struct hso_serial *serial = urb->context;
1927         int status = urb->status;
1928         struct tty_struct *tty;
1929
1930         /* sanity check */
1931         if (!serial) {
1932                 D1("serial == NULL");
1933                 return;
1934         }
1935
1936         spin_lock(&serial->serial_lock);
1937         serial->tx_urb_used = 0;
1938         spin_unlock(&serial->serial_lock);
1939         if (status) {
1940                 handle_usb_error(status, __func__, serial->parent);
1941                 return;
1942         }
1943         hso_put_activity(serial->parent);
1944         tty = tty_port_tty_get(&serial->port);
1945         if (tty) {
1946                 tty_wakeup(tty);
1947                 tty_kref_put(tty);
1948         }
1949         hso_kick_transmit(serial);
1950
1951         D1(" ");
1952 }
1953
1954 /* called for writing diag or CS serial port */
1955 static int hso_std_serial_write_data(struct hso_serial *serial)
1956 {
1957         int count = serial->tx_data_count;
1958         int result;
1959
1960         usb_fill_bulk_urb(serial->tx_urb,
1961                           serial->parent->usb,
1962                           usb_sndbulkpipe(serial->parent->usb,
1963                                           serial->out_endp->
1964                                           bEndpointAddress & 0x7F),
1965                           serial->tx_data, serial->tx_data_count,
1966                           hso_std_serial_write_bulk_callback, serial);
1967
1968         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1969         if (result) {
1970                 dev_warn(&serial->parent->usb->dev,
1971                          "Failed to submit urb - res %d\n", result);
1972                 return result;
1973         }
1974
1975         return count;
1976 }
1977
1978 /* callback after read or write on muxed serial port */
1979 static void ctrl_callback(struct urb *urb)
1980 {
1981         struct hso_serial *serial = urb->context;
1982         struct usb_ctrlrequest *req;
1983         int status = urb->status;
1984
1985         /* sanity check */
1986         if (!serial)
1987                 return;
1988
1989         spin_lock(&serial->serial_lock);
1990         serial->tx_urb_used = 0;
1991         spin_unlock(&serial->serial_lock);
1992         if (status) {
1993                 handle_usb_error(status, __func__, serial->parent);
1994                 return;
1995         }
1996
1997         /* what request? */
1998         req = (struct usb_ctrlrequest *)(urb->setup_packet);
1999         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
2000         D4("Actual length of urb = %d\n", urb->actual_length);
2001         DUMP1(urb->transfer_buffer, urb->actual_length);
2002
2003         if (req->bRequestType ==
2004             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
2005                 /* response to a read command */
2006                 serial->rx_urb_filled[0] = 1;
2007                 spin_lock(&serial->serial_lock);
2008                 put_rxbuf_data_and_resubmit_ctrl_urb(serial);
2009                 spin_unlock(&serial->serial_lock);
2010         } else {
2011                 struct tty_struct *tty = tty_port_tty_get(&serial->port);
2012                 hso_put_activity(serial->parent);
2013                 if (tty) {
2014                         tty_wakeup(tty);
2015                         tty_kref_put(tty);
2016                 }
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[17];
2829         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2830         s32 result;
2831
2832         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2833                             0x86, 0xC0, 0, 0, config_data, 17,
2834                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2835                 return -EIO;
2836         }
2837
2838         switch (config_data[if_num]) {
2839         case 0x0:
2840                 result = 0;
2841                 break;
2842         case 0x1:
2843                 result = HSO_PORT_DIAG;
2844                 break;
2845         case 0x2:
2846                 result = HSO_PORT_GPS;
2847                 break;
2848         case 0x3:
2849                 result = HSO_PORT_GPS_CONTROL;
2850                 break;
2851         case 0x4:
2852                 result = HSO_PORT_APP;
2853                 break;
2854         case 0x5:
2855                 result = HSO_PORT_APP2;
2856                 break;
2857         case 0x6:
2858                 result = HSO_PORT_CONTROL;
2859                 break;
2860         case 0x7:
2861                 result = HSO_PORT_NETWORK;
2862                 break;
2863         case 0x8:
2864                 result = HSO_PORT_MODEM;
2865                 break;
2866         case 0x9:
2867                 result = HSO_PORT_MSD;
2868                 break;
2869         case 0xa:
2870                 result = HSO_PORT_PCSC;
2871                 break;
2872         case 0xb:
2873                 result = HSO_PORT_VOICE;
2874                 break;
2875         default:
2876                 result = 0;
2877         }
2878
2879         if (result)
2880                 result |= HSO_INTF_BULK;
2881
2882         if (config_data[16] & 0x1)
2883                 result |= HSO_INFO_CRC_BUG;
2884
2885         return result;
2886 }
2887
2888 /* called once for each interface upon device insertion */
2889 static int hso_probe(struct usb_interface *interface,
2890                      const struct usb_device_id *id)
2891 {
2892         int mux, i, if_num, port_spec;
2893         unsigned char port_mask;
2894         struct hso_device *hso_dev = NULL;
2895         struct hso_shared_int *shared_int;
2896         struct hso_device *tmp_dev = NULL;
2897
2898         if_num = interface->altsetting->desc.bInterfaceNumber;
2899
2900         /* Get the interface/port specification from either driver_info or from
2901          * the device itself */
2902         if (id->driver_info)
2903                 port_spec = ((u32 *)(id->driver_info))[if_num];
2904         else
2905                 port_spec = hso_get_config_data(interface);
2906
2907         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2908                 dev_err(&interface->dev, "Not our interface\n");
2909                 return -ENODEV;
2910         }
2911         /* Check if we need to switch to alt interfaces prior to port
2912          * configuration */
2913         if (interface->num_altsetting > 1)
2914                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2915         interface->needs_remote_wakeup = 1;
2916
2917         /* Allocate new hso device(s) */
2918         switch (port_spec & HSO_INTF_MASK) {
2919         case HSO_INTF_MUX:
2920                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2921                         /* Create the network device */
2922                         if (!disable_net) {
2923                                 hso_dev = hso_create_net_device(interface,
2924                                                                 port_spec);
2925                                 if (!hso_dev)
2926                                         goto exit;
2927                                 tmp_dev = hso_dev;
2928                         }
2929                 }
2930
2931                 if (hso_get_mux_ports(interface, &port_mask))
2932                         /* TODO: de-allocate everything */
2933                         goto exit;
2934
2935                 shared_int = hso_create_shared_int(interface);
2936                 if (!shared_int)
2937                         goto exit;
2938
2939                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2940                         if (port_mask & i) {
2941                                 hso_dev = hso_create_mux_serial_device(
2942                                                 interface, i, shared_int);
2943                                 if (!hso_dev)
2944                                         goto exit;
2945                         }
2946                 }
2947
2948                 if (tmp_dev)
2949                         hso_dev = tmp_dev;
2950                 break;
2951
2952         case HSO_INTF_BULK:
2953                 /* It's a regular bulk interface */
2954                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2955                         if (!disable_net)
2956                                 hso_dev =
2957                                     hso_create_net_device(interface, port_spec);
2958                 } else {
2959                         hso_dev =
2960                             hso_create_bulk_serial_device(interface, port_spec);
2961                 }
2962                 if (!hso_dev)
2963                         goto exit;
2964                 break;
2965         default:
2966                 goto exit;
2967         }
2968
2969         /* save our data pointer in this device */
2970         usb_set_intfdata(interface, hso_dev);
2971
2972         /* done */
2973         return 0;
2974 exit:
2975         hso_free_interface(interface);
2976         return -ENODEV;
2977 }
2978
2979 /* device removed, cleaning up */
2980 static void hso_disconnect(struct usb_interface *interface)
2981 {
2982         hso_free_interface(interface);
2983
2984         /* remove reference of our private data */
2985         usb_set_intfdata(interface, NULL);
2986 }
2987
2988 static void async_get_intf(struct work_struct *data)
2989 {
2990         struct hso_device *hso_dev =
2991             container_of(data, struct hso_device, async_get_intf);
2992         usb_autopm_get_interface(hso_dev->interface);
2993 }
2994
2995 static void async_put_intf(struct work_struct *data)
2996 {
2997         struct hso_device *hso_dev =
2998             container_of(data, struct hso_device, async_put_intf);
2999         usb_autopm_put_interface(hso_dev->interface);
3000 }
3001
3002 static int hso_get_activity(struct hso_device *hso_dev)
3003 {
3004         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
3005                 if (!hso_dev->is_active) {
3006                         hso_dev->is_active = 1;
3007                         schedule_work(&hso_dev->async_get_intf);
3008                 }
3009         }
3010
3011         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
3012                 return -EAGAIN;
3013
3014         usb_mark_last_busy(hso_dev->usb);
3015
3016         return 0;
3017 }
3018
3019 static int hso_put_activity(struct hso_device *hso_dev)
3020 {
3021         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
3022                 if (hso_dev->is_active) {
3023                         hso_dev->is_active = 0;
3024                         schedule_work(&hso_dev->async_put_intf);
3025                         return -EAGAIN;
3026                 }
3027         }
3028         hso_dev->is_active = 0;
3029         return 0;
3030 }
3031
3032 /* called by kernel when we need to suspend device */
3033 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
3034 {
3035         int i, result;
3036
3037         /* Stop all serial ports */
3038         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3039                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3040                         result = hso_stop_serial_device(serial_table[i]);
3041                         if (result)
3042                                 goto out;
3043                 }
3044         }
3045
3046         /* Stop all network ports */
3047         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3048                 if (network_table[i] &&
3049                     (network_table[i]->interface == iface)) {
3050                         result = hso_stop_net_device(network_table[i]);
3051                         if (result)
3052                                 goto out;
3053                 }
3054         }
3055
3056 out:
3057         return 0;
3058 }
3059
3060 /* called by kernel when we need to resume device */
3061 static int hso_resume(struct usb_interface *iface)
3062 {
3063         int i, result = 0;
3064         struct hso_net *hso_net;
3065
3066         /* Start all serial ports */
3067         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3068                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
3069                         if (dev2ser(serial_table[i])->port.count) {
3070                                 result =
3071                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
3072                                 hso_kick_transmit(dev2ser(serial_table[i]));
3073                                 if (result)
3074                                         goto out;
3075                         }
3076                 }
3077         }
3078
3079         /* Start all network ports */
3080         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
3081                 if (network_table[i] &&
3082                     (network_table[i]->interface == iface)) {
3083                         hso_net = dev2net(network_table[i]);
3084                         if (hso_net->flags & IFF_UP) {
3085                                 /* First transmit any lingering data,
3086                                    then restart the device. */
3087                                 if (hso_net->skb_tx_buf) {
3088                                         dev_dbg(&iface->dev,
3089                                                 "Transmitting"
3090                                                 " lingering data\n");
3091                                         hso_net_start_xmit(hso_net->skb_tx_buf,
3092                                                            hso_net->net);
3093                                         hso_net->skb_tx_buf = NULL;
3094                                 }
3095                                 result = hso_start_net_device(network_table[i]);
3096                                 if (result)
3097                                         goto out;
3098                         }
3099                 }
3100         }
3101
3102 out:
3103         return result;
3104 }
3105
3106 static void reset_device(struct work_struct *data)
3107 {
3108         struct hso_device *hso_dev =
3109             container_of(data, struct hso_device, reset_device);
3110         struct usb_device *usb = hso_dev->usb;
3111         int result;
3112
3113         if (hso_dev->usb_gone) {
3114                 D1("No reset during disconnect\n");
3115         } else {
3116                 result = usb_lock_device_for_reset(usb, hso_dev->interface);
3117                 if (result < 0)
3118                         D1("unable to lock device for reset: %d\n", result);
3119                 else {
3120                         usb_reset_device(usb);
3121                         usb_unlock_device(usb);
3122                 }
3123         }
3124 }
3125
3126 static void hso_serial_ref_free(struct kref *ref)
3127 {
3128         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
3129
3130         hso_free_serial_device(hso_dev);
3131 }
3132
3133 static void hso_free_interface(struct usb_interface *interface)
3134 {
3135         struct hso_serial *hso_dev;
3136         struct tty_struct *tty;
3137         int i;
3138
3139         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
3140                 if (serial_table[i] &&
3141                     (serial_table[i]->interface == interface)) {
3142                         hso_dev = dev2ser(serial_table[i]);
3143                         tty = tty_port_tty_get(&hso_dev->port);
3144                         if (tty) {
3145                                 tty_hangup(tty);
3146                                 tty_kref_put(tty);
3147                         }
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);