git.oblomov.eu Git - linux-2.6/blob - drivers/net/usb/hso.c

   1 /******************************************************************************
   2  *
   3  * Driver for Option High Speed Mobile Devices.
   4  *
   5  *  Copyright (C) 2008 Option International
   6  *  Copyright (C) 2007 Andrew Bird (Sphere Systems Ltd)
   7  *                      <ajb@spheresystems.co.uk>
   8  *  Copyright (C) 2008 Greg Kroah-Hartman <gregkh@suse.de>
   9  *  Copyright (C) 2008 Novell, Inc.
  10  *
  11  *  This program is free software; you can redistribute it and/or modify
  12  *  it under the terms of the GNU General Public License version 2 as
  13  *  published by the Free Software Foundation.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  23  *  USA
  24  *
  25  *
  26  *****************************************************************************/
  27
  28 /******************************************************************************
  29  *
  30  * Description of the device:
  31  *
  32  * Interface 0: Contains the IP network interface on the bulk end points.
  33  *              The multiplexed serial ports are using the interrupt and
  34  *              control endpoints.
  35  *              Interrupt contains a bitmap telling which multiplexed
  36  *              serialport needs servicing.
  37  *
  38  * Interface 1: Diagnostics port, uses bulk only, do not submit urbs until the
  39  *              port is opened, as this have a huge impact on the network port
  40  *              throughput.
  41  *
  42  * Interface 2: Standard modem interface - circuit switched interface, should
  43  *              not be used.
  44  *
  45  *****************************************************************************/
  46
  47 #include <linux/sched.h>
  48 #include <linux/slab.h>
  49 #include <linux/init.h>
  50 #include <linux/delay.h>
  51 #include <linux/netdevice.h>
  52 #include <linux/module.h>
  53 #include <linux/ethtool.h>
  54 #include <linux/usb.h>
  55 #include <linux/timer.h>
  56 #include <linux/tty.h>
  57 #include <linux/tty_driver.h>
  58 #include <linux/tty_flip.h>
  59 #include <linux/kmod.h>
  60 #include <linux/rfkill.h>
  61 #include <linux/ip.h>
  62 #include <linux/uaccess.h>
  63 #include <linux/usb/cdc.h>
  64 #include <net/arp.h>
  65 #include <asm/byteorder.h>
  66
  67
  68 #define DRIVER_VERSION                  "1.2"
  69 #define MOD_AUTHOR                      "Option Wireless"
  70 #define MOD_DESCRIPTION                 "USB High Speed Option driver"
  71 #define MOD_LICENSE                     "GPL"
  72
  73 #define HSO_MAX_NET_DEVICES             10
  74 #define HSO__MAX_MTU                    2048
  75 #define DEFAULT_MTU                     1500
  76 #define DEFAULT_MRU                     1500
  77
  78 #define CTRL_URB_RX_SIZE                1024
  79 #define CTRL_URB_TX_SIZE                64
  80
  81 #define BULK_URB_RX_SIZE                4096
  82 #define BULK_URB_TX_SIZE                8192
  83
  84 #define MUX_BULK_RX_BUF_SIZE            HSO__MAX_MTU
  85 #define MUX_BULK_TX_BUF_SIZE            HSO__MAX_MTU
  86 #define MUX_BULK_RX_BUF_COUNT           4
  87 #define USB_TYPE_OPTION_VENDOR          0x20
  88
  89 /* These definitions are used with the struct hso_net flags element */
  90 /* - use *_bit operations on it. (bit indices not values.) */
  91 #define HSO_NET_RUNNING                 0
  92
  93 #define HSO_NET_TX_TIMEOUT              (HZ*10)
  94
  95 /* Serial port defines and structs. */
  96 #define HSO_SERIAL_FLAG_RX_SENT         0
  97
  98 #define HSO_SERIAL_MAGIC                0x48534f31
  99
 100 /* Number of ttys to handle */
 101 #define HSO_SERIAL_TTY_MINORS           256
 102
 103 #define MAX_RX_URBS                     2
 104
 105 #define get_serial_by_tty(x)    \
 106         (x ? (struct hso_serial *)x->driver_data : NULL)
 107
 108 /*****************************************************************************/
 109 /* Debugging functions                                                       */
 110 /*****************************************************************************/
 111 #define D__(lvl_, fmt, arg...)                          \
 112         do {                                            \
 113                 printk(lvl_ "[%d:%s]: " fmt "\n",       \
 114                        __LINE__, __func__, ## arg);     \
 115         } while (0)
 116
 117 #define D_(lvl, args...)                                \
 118         do {                                            \
 119                 if (lvl & debug)                        \
 120                         D__(KERN_INFO, args);           \
 121         } while (0)
 122
 123 #define D1(args...)     D_(0x01, ##args)
 124 #define D2(args...)     D_(0x02, ##args)
 125 #define D3(args...)     D_(0x04, ##args)
 126 #define D4(args...)     D_(0x08, ##args)
 127 #define D5(args...)     D_(0x10, ##args)
 128
 129 /*****************************************************************************/
 130 /* Enumerators                                                               */
 131 /*****************************************************************************/
 132 enum pkt_parse_state {
 133         WAIT_IP,
 134         WAIT_DATA,
 135         WAIT_SYNC
 136 };
 137
 138 /*****************************************************************************/
 139 /* Structs                                                                   */
 140 /*****************************************************************************/
 141
 142 struct hso_shared_int {
 143         struct usb_endpoint_descriptor *intr_endp;
 144         void *shared_intr_buf;
 145         struct urb *shared_intr_urb;
 146         struct usb_device *usb;
 147         int use_count;
 148         int ref_count;
 149         struct mutex shared_int_lock;
 150 };
 151
 152 struct hso_net {
 153         struct hso_device *parent;
 154         struct net_device *net;
 155         struct rfkill *rfkill;
 156
 157         struct usb_endpoint_descriptor *in_endp;
 158         struct usb_endpoint_descriptor *out_endp;
 159
 160         struct urb *mux_bulk_rx_urb_pool[MUX_BULK_RX_BUF_COUNT];
 161         struct urb *mux_bulk_tx_urb;
 162         void *mux_bulk_rx_buf_pool[MUX_BULK_RX_BUF_COUNT];
 163         void *mux_bulk_tx_buf;
 164
 165         struct sk_buff *skb_rx_buf;
 166         struct sk_buff *skb_tx_buf;
 167
 168         enum pkt_parse_state rx_parse_state;
 169         spinlock_t net_lock;
 170
 171         unsigned short rx_buf_size;
 172         unsigned short rx_buf_missing;
 173         struct iphdr rx_ip_hdr;
 174
 175         unsigned long flags;
 176 };
 177
 178 struct hso_serial {
 179         struct hso_device *parent;
 180         int magic;
 181         u8 minor;
 182
 183         struct hso_shared_int *shared_int;
 184
 185         /* rx/tx urb could be either a bulk urb or a control urb depending
 186            on which serial port it is used on. */
 187         struct urb *rx_urb[MAX_RX_URBS];
 188         u8 num_rx_urbs;
 189         u8 *rx_data[MAX_RX_URBS];
 190         u16 rx_data_length;     /* should contain allocated length */
 191
 192         struct urb *tx_urb;
 193         u8 *tx_data;
 194         u8 *tx_buffer;
 195         u16 tx_data_length;     /* should contain allocated length */
 196         u16 tx_data_count;
 197         u16 tx_buffer_count;
 198         struct usb_ctrlrequest ctrl_req_tx;
 199         struct usb_ctrlrequest ctrl_req_rx;
 200
 201         struct usb_endpoint_descriptor *in_endp;
 202         struct usb_endpoint_descriptor *out_endp;
 203
 204         unsigned long flags;
 205         u8 rts_state;
 206         u8 dtr_state;
 207         unsigned tx_urb_used:1;
 208
 209         /* from usb_serial_port */
 210         struct tty_struct *tty;
 211         int open_count;
 212         spinlock_t serial_lock;
 213
 214         int (*write_data) (struct hso_serial *serial);
 215 };
 216
 217 struct hso_device {
 218         union {
 219                 struct hso_serial *dev_serial;
 220                 struct hso_net *dev_net;
 221         } port_data;
 222
 223         u32 port_spec;
 224
 225         u8 is_active;
 226         u8 usb_gone;
 227         struct work_struct async_get_intf;
 228         struct work_struct async_put_intf;
 229
 230         struct usb_device *usb;
 231         struct usb_interface *interface;
 232
 233         struct device *dev;
 234         struct kref ref;
 235         struct mutex mutex;
 236 };
 237
 238 /* Type of interface */
 239 #define HSO_INTF_MASK           0xFF00
 240 #define HSO_INTF_MUX            0x0100
 241 #define HSO_INTF_BULK           0x0200
 242
 243 /* Type of port */
 244 #define HSO_PORT_MASK           0xFF
 245 #define HSO_PORT_NO_PORT        0x0
 246 #define HSO_PORT_CONTROL        0x1
 247 #define HSO_PORT_APP            0x2
 248 #define HSO_PORT_GPS            0x3
 249 #define HSO_PORT_PCSC           0x4
 250 #define HSO_PORT_APP2           0x5
 251 #define HSO_PORT_GPS_CONTROL    0x6
 252 #define HSO_PORT_MSD            0x7
 253 #define HSO_PORT_VOICE          0x8
 254 #define HSO_PORT_DIAG2          0x9
 255 #define HSO_PORT_DIAG           0x10
 256 #define HSO_PORT_MODEM          0x11
 257 #define HSO_PORT_NETWORK        0x12
 258
 259 /* Additional device info */
 260 #define HSO_INFO_MASK           0xFF000000
 261 #define HSO_INFO_CRC_BUG        0x01000000
 262
 263 /*****************************************************************************/
 264 /* Prototypes                                                                */
 265 /*****************************************************************************/
 266 /* Serial driver functions */
 267 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
 268                                unsigned int set, unsigned int clear);
 269 static void ctrl_callback(struct urb *urb);
 270 static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial);
 271 static void hso_kick_transmit(struct hso_serial *serial);
 272 /* Helper functions */
 273 static int hso_mux_submit_intr_urb(struct hso_shared_int *mux_int,
 274                                    struct usb_device *usb, gfp_t gfp);
 275 static void log_usb_status(int status, const char *function);
 276 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
 277                                                   int type, int dir);
 278 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports);
 279 static void hso_free_interface(struct usb_interface *intf);
 280 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags);
 281 static int hso_stop_serial_device(struct hso_device *hso_dev);
 282 static int hso_start_net_device(struct hso_device *hso_dev);
 283 static void hso_free_shared_int(struct hso_shared_int *shared_int);
 284 static int hso_stop_net_device(struct hso_device *hso_dev);
 285 static void hso_serial_ref_free(struct kref *ref);
 286 static void async_get_intf(struct work_struct *data);
 287 static void async_put_intf(struct work_struct *data);
 288 static int hso_put_activity(struct hso_device *hso_dev);
 289 static int hso_get_activity(struct hso_device *hso_dev);
 290
 291 /*****************************************************************************/
 292 /* Helping functions                                                         */
 293 /*****************************************************************************/
 294
 295 /* #define DEBUG */
 296
 297 #define dev2net(x) (x->port_data.dev_net)
 298 #define dev2ser(x) (x->port_data.dev_serial)
 299
 300 /* Debugging functions */
 301 #ifdef DEBUG
 302 static void dbg_dump(int line_count, const char *func_name, unsigned char *buf,
 303                      unsigned int len)
 304 {
 305         u8 i = 0;
 306
 307         printk(KERN_DEBUG "[%d:%s]: len %d", line_count, func_name, len);
 308
 309         for (i = 0; i < len; i++) {
 310                 if (!(i % 16))
 311                         printk("\n    0x%03x:  ", i);
 312                 printk("%02x ", (unsigned char)buf[i]);
 313         }
 314         printk("\n");
 315 }
 316
 317 #define DUMP(buf_, len_)        \
 318         dbg_dump(__LINE__, __func__, buf_, len_)
 319
 320 #define DUMP1(buf_, len_)                       \
 321         do {                                    \
 322                 if (0x01 & debug)               \
 323                         DUMP(buf_, len_);       \
 324         } while (0)
 325 #else
 326 #define DUMP(buf_, len_)
 327 #define DUMP1(buf_, len_)
 328 #endif
 329
 330 /* module parameters */
 331 static int debug;
 332 static int tty_major;
 333 static int disable_net;
 334
 335 /* driver info */
 336 static const char driver_name[] = "hso";
 337 static const char tty_filename[] = "ttyHS";
 338 static const char *version = __FILE__ ": " DRIVER_VERSION " " MOD_AUTHOR;
 339 /* the usb driver itself (registered in hso_init) */
 340 static struct usb_driver hso_driver;
 341 /* serial structures */
 342 static struct tty_driver *tty_drv;
 343 static struct hso_device *serial_table[HSO_SERIAL_TTY_MINORS];
 344 static struct hso_device *network_table[HSO_MAX_NET_DEVICES];
 345 static spinlock_t serial_table_lock;
 346 static struct ktermios *hso_serial_termios[HSO_SERIAL_TTY_MINORS];
 347 static struct ktermios *hso_serial_termios_locked[HSO_SERIAL_TTY_MINORS];
 348
 349 static const s32 default_port_spec[] = {
 350         HSO_INTF_MUX | HSO_PORT_NETWORK,
 351         HSO_INTF_BULK | HSO_PORT_DIAG,
 352         HSO_INTF_BULK | HSO_PORT_MODEM,
 353         0
 354 };
 355
 356 static const s32 icon321_port_spec[] = {
 357         HSO_INTF_MUX | HSO_PORT_NETWORK,
 358         HSO_INTF_BULK | HSO_PORT_DIAG2,
 359         HSO_INTF_BULK | HSO_PORT_MODEM,
 360         HSO_INTF_BULK | HSO_PORT_DIAG,
 361         0
 362 };
 363
 364 #define default_port_device(vendor, product)    \
 365         USB_DEVICE(vendor, product),    \
 366                 .driver_info = (kernel_ulong_t)default_port_spec
 367
 368 #define icon321_port_device(vendor, product)    \
 369         USB_DEVICE(vendor, product),    \
 370                 .driver_info = (kernel_ulong_t)icon321_port_spec
 371
 372 /* list of devices we support */
 373 static const struct usb_device_id hso_ids[] = {
 374         {default_port_device(0x0af0, 0x6711)},
 375         {default_port_device(0x0af0, 0x6731)},
 376         {default_port_device(0x0af0, 0x6751)},
 377         {default_port_device(0x0af0, 0x6771)},
 378         {default_port_device(0x0af0, 0x6791)},
 379         {default_port_device(0x0af0, 0x6811)},
 380         {default_port_device(0x0af0, 0x6911)},
 381         {default_port_device(0x0af0, 0x6951)},
 382         {default_port_device(0x0af0, 0x6971)},
 383         {default_port_device(0x0af0, 0x7011)},
 384         {default_port_device(0x0af0, 0x7031)},
 385         {default_port_device(0x0af0, 0x7051)},
 386         {default_port_device(0x0af0, 0x7071)},
 387         {default_port_device(0x0af0, 0x7111)},
 388         {default_port_device(0x0af0, 0x7211)},
 389         {default_port_device(0x0af0, 0x7251)},
 390         {default_port_device(0x0af0, 0x7271)},
 391         {default_port_device(0x0af0, 0x7311)},
 392         {default_port_device(0x0af0, 0xc031)},  /* Icon-Edge */
 393         {icon321_port_device(0x0af0, 0xd013)},  /* Module HSxPA */
 394         {icon321_port_device(0x0af0, 0xd031)},  /* Icon-321 */
 395         {default_port_device(0x0af0, 0xd033)},  /* Icon-322 */
 396         {USB_DEVICE(0x0af0, 0x7301)},           /* GE40x */
 397         {USB_DEVICE(0x0af0, 0x7361)},           /* GE40x */
 398         {USB_DEVICE(0x0af0, 0x7401)},           /* GI 0401 */
 399         {USB_DEVICE(0x0af0, 0x7501)},           /* GTM 382 */
 400         {USB_DEVICE(0x0af0, 0x7601)},           /* GE40x */
 401         {}
 402 };
 403 MODULE_DEVICE_TABLE(usb, hso_ids);
 404
 405 /* Sysfs attribute */
 406 static ssize_t hso_sysfs_show_porttype(struct device *dev,
 407                                        struct device_attribute *attr,
 408                                        char *buf)
 409 {
 410         struct hso_device *hso_dev = dev->driver_data;
 411         char *port_name;
 412
 413         if (!hso_dev)
 414                 return 0;
 415
 416         switch (hso_dev->port_spec & HSO_PORT_MASK) {
 417         case HSO_PORT_CONTROL:
 418                 port_name = "Control";
 419                 break;
 420         case HSO_PORT_APP:
 421                 port_name = "Application";
 422                 break;
 423         case HSO_PORT_APP2:
 424                 port_name = "Application2";
 425                 break;
 426         case HSO_PORT_GPS:
 427                 port_name = "GPS";
 428                 break;
 429         case HSO_PORT_GPS_CONTROL:
 430                 port_name = "GPS Control";
 431                 break;
 432         case HSO_PORT_PCSC:
 433                 port_name = "PCSC";
 434                 break;
 435         case HSO_PORT_DIAG:
 436                 port_name = "Diagnostic";
 437                 break;
 438         case HSO_PORT_DIAG2:
 439                 port_name = "Diagnostic2";
 440                 break;
 441         case HSO_PORT_MODEM:
 442                 port_name = "Modem";
 443                 break;
 444         case HSO_PORT_NETWORK:
 445                 port_name = "Network";
 446                 break;
 447         default:
 448                 port_name = "Unknown";
 449                 break;
 450         }
 451
 452         return sprintf(buf, "%s\n", port_name);
 453 }
 454 static DEVICE_ATTR(hsotype, S_IRUGO, hso_sysfs_show_porttype, NULL);
 455
 456 /* converts mux value to a port spec value */
 457 static u32 hso_mux_to_port(int mux)
 458 {
 459         u32 result;
 460
 461         switch (mux) {
 462         case 0x1:
 463                 result = HSO_PORT_CONTROL;
 464                 break;
 465         case 0x2:
 466                 result = HSO_PORT_APP;
 467                 break;
 468         case 0x4:
 469                 result = HSO_PORT_PCSC;
 470                 break;
 471         case 0x8:
 472                 result = HSO_PORT_GPS;
 473                 break;
 474         case 0x10:
 475                 result = HSO_PORT_APP2;
 476                 break;
 477         default:
 478                 result = HSO_PORT_NO_PORT;
 479         }
 480         return result;
 481 }
 482
 483 /* converts port spec value to a mux value */
 484 static u32 hso_port_to_mux(int port)
 485 {
 486         u32 result;
 487
 488         switch (port & HSO_PORT_MASK) {
 489         case HSO_PORT_CONTROL:
 490                 result = 0x0;
 491                 break;
 492         case HSO_PORT_APP:
 493                 result = 0x1;
 494                 break;
 495         case HSO_PORT_PCSC:
 496                 result = 0x2;
 497                 break;
 498         case HSO_PORT_GPS:
 499                 result = 0x3;
 500                 break;
 501         case HSO_PORT_APP2:
 502                 result = 0x4;
 503                 break;
 504         default:
 505                 result = 0x0;
 506         }
 507         return result;
 508 }
 509
 510 static struct hso_serial *get_serial_by_shared_int_and_type(
 511                                         struct hso_shared_int *shared_int,
 512                                         int mux)
 513 {
 514         int i, port;
 515
 516         port = hso_mux_to_port(mux);
 517
 518         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
 519                 if (serial_table[i]
 520                     && (dev2ser(serial_table[i])->shared_int == shared_int)
 521                     && ((serial_table[i]->port_spec & HSO_PORT_MASK) == port)) {
 522                         return dev2ser(serial_table[i]);
 523                 }
 524         }
 525
 526         return NULL;
 527 }
 528
 529 static struct hso_serial *get_serial_by_index(unsigned index)
 530 {
 531         struct hso_serial *serial;
 532         unsigned long flags;
 533
 534         if (!serial_table[index])
 535                 return NULL;
 536         spin_lock_irqsave(&serial_table_lock, flags);
 537         serial = dev2ser(serial_table[index]);
 538         spin_unlock_irqrestore(&serial_table_lock, flags);
 539
 540         return serial;
 541 }
 542
 543 static int get_free_serial_index(void)
 544 {
 545         int index;
 546         unsigned long flags;
 547
 548         spin_lock_irqsave(&serial_table_lock, flags);
 549         for (index = 0; index < HSO_SERIAL_TTY_MINORS; index++) {
 550                 if (serial_table[index] == NULL) {
 551                         spin_unlock_irqrestore(&serial_table_lock, flags);
 552                         return index;
 553                 }
 554         }
 555         spin_unlock_irqrestore(&serial_table_lock, flags);
 556
 557         printk(KERN_ERR "%s: no free serial devices in table\n", __func__);
 558         return -1;
 559 }
 560
 561 static void set_serial_by_index(unsigned index, struct hso_serial *serial)
 562 {
 563         unsigned long flags;
 564         spin_lock_irqsave(&serial_table_lock, flags);
 565         if (serial)
 566                 serial_table[index] = serial->parent;
 567         else
 568                 serial_table[index] = NULL;
 569         spin_unlock_irqrestore(&serial_table_lock, flags);
 570 }
 571
 572 /* log a meaningfull explanation of an USB status */
 573 static void log_usb_status(int status, const char *function)
 574 {
 575         char *explanation;
 576
 577         switch (status) {
 578         case -ENODEV:
 579                 explanation = "no device";
 580                 break;
 581         case -ENOENT:
 582                 explanation = "endpoint not enabled";
 583                 break;
 584         case -EPIPE:
 585                 explanation = "endpoint stalled";
 586                 break;
 587         case -ENOSPC:
 588                 explanation = "not enough bandwidth";
 589                 break;
 590         case -ESHUTDOWN:
 591                 explanation = "device disabled";
 592                 break;
 593         case -EHOSTUNREACH:
 594                 explanation = "device suspended";
 595                 break;
 596         case -EINVAL:
 597         case -EAGAIN:
 598         case -EFBIG:
 599         case -EMSGSIZE:
 600                 explanation = "internal error";
 601                 break;
 602         default:
 603                 explanation = "unknown status";
 604                 break;
 605         }
 606         D1("%s: received USB status - %s (%d)", function, explanation, status);
 607 }
 608
 609 /* Network interface functions */
 610
 611 /* called when net interface is brought up by ifconfig */
 612 static int hso_net_open(struct net_device *net)
 613 {
 614         struct hso_net *odev = netdev_priv(net);
 615         unsigned long flags = 0;
 616
 617         if (!odev) {
 618                 dev_err(&net->dev, "No net device !\n");
 619                 return -ENODEV;
 620         }
 621
 622         odev->skb_tx_buf = NULL;
 623
 624         /* setup environment */
 625         spin_lock_irqsave(&odev->net_lock, flags);
 626         odev->rx_parse_state = WAIT_IP;
 627         odev->rx_buf_size = 0;
 628         odev->rx_buf_missing = sizeof(struct iphdr);
 629         spin_unlock_irqrestore(&odev->net_lock, flags);
 630
 631         hso_start_net_device(odev->parent);
 632
 633         /* We are up and running. */
 634         set_bit(HSO_NET_RUNNING, &odev->flags);
 635
 636         /* Tell the kernel we are ready to start receiving from it */
 637         netif_start_queue(net);
 638
 639         return 0;
 640 }
 641
 642 /* called when interface is brought down by ifconfig */
 643 static int hso_net_close(struct net_device *net)
 644 {
 645         struct hso_net *odev = netdev_priv(net);
 646
 647         /* we don't need the queue anymore */
 648         netif_stop_queue(net);
 649         /* no longer running */
 650         clear_bit(HSO_NET_RUNNING, &odev->flags);
 651
 652         hso_stop_net_device(odev->parent);
 653
 654         /* done */
 655         return 0;
 656 }
 657
 658 /* USB tells is xmit done, we should start the netqueue again */
 659 static void write_bulk_callback(struct urb *urb)
 660 {
 661         struct hso_net *odev = urb->context;
 662         int status = urb->status;
 663
 664         /* Sanity check */
 665         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 666                 dev_err(&urb->dev->dev, "%s: device not running\n", __func__);
 667                 return;
 668         }
 669
 670         /* Do we still have a valid kernel network device? */
 671         if (!netif_device_present(odev->net)) {
 672                 dev_err(&urb->dev->dev, "%s: net device not present\n",
 673                         __func__);
 674                 return;
 675         }
 676
 677         /* log status, but don't act on it, we don't need to resubmit anything
 678          * anyhow */
 679         if (status)
 680                 log_usb_status(status, __func__);
 681
 682         hso_put_activity(odev->parent);
 683
 684         /* Tell the network interface we are ready for another frame */
 685         netif_wake_queue(odev->net);
 686 }
 687
 688 /* called by kernel when we need to transmit a packet */
 689 static int hso_net_start_xmit(struct sk_buff *skb, struct net_device *net)
 690 {
 691         struct hso_net *odev = netdev_priv(net);
 692         int result;
 693
 694         /* Tell the kernel, "No more frames 'til we are done with this one." */
 695         netif_stop_queue(net);
 696         if (hso_get_activity(odev->parent) == -EAGAIN) {
 697                 odev->skb_tx_buf = skb;
 698                 return 0;
 699         }
 700
 701         /* log if asked */
 702         DUMP1(skb->data, skb->len);
 703         /* Copy it from kernel memory to OUR memory */
 704         memcpy(odev->mux_bulk_tx_buf, skb->data, skb->len);
 705         D1("len: %d/%d", skb->len, MUX_BULK_TX_BUF_SIZE);
 706
 707         /* Fill in the URB for shipping it out. */
 708         usb_fill_bulk_urb(odev->mux_bulk_tx_urb,
 709                           odev->parent->usb,
 710                           usb_sndbulkpipe(odev->parent->usb,
 711                                           odev->out_endp->
 712                                           bEndpointAddress & 0x7F),
 713                           odev->mux_bulk_tx_buf, skb->len, write_bulk_callback,
 714                           odev);
 715
 716         /* Deal with the Zero Length packet problem, I hope */
 717         odev->mux_bulk_tx_urb->transfer_flags |= URB_ZERO_PACKET;
 718
 719         /* Send the URB on its merry way. */
 720         result = usb_submit_urb(odev->mux_bulk_tx_urb, GFP_ATOMIC);
 721         if (result) {
 722                 dev_warn(&odev->parent->interface->dev,
 723                         "failed mux_bulk_tx_urb %d", result);
 724                 net->stats.tx_errors++;
 725                 netif_start_queue(net);
 726         } else {
 727                 net->stats.tx_packets++;
 728                 net->stats.tx_bytes += skb->len;
 729                 /* And tell the kernel when the last transmit started. */
 730                 net->trans_start = jiffies;
 731         }
 732         dev_kfree_skb(skb);
 733         /* we're done */
 734         return result;
 735 }
 736
 737 static void hso_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *info)
 738 {
 739         struct hso_net *odev = netdev_priv(net);
 740
 741         strncpy(info->driver, driver_name, ETHTOOL_BUSINFO_LEN);
 742         strncpy(info->version, DRIVER_VERSION, ETHTOOL_BUSINFO_LEN);
 743         usb_make_path(odev->parent->usb, info->bus_info, sizeof info->bus_info);
 744 }
 745
 746 static struct ethtool_ops ops = {
 747         .get_drvinfo = hso_get_drvinfo,
 748         .get_link = ethtool_op_get_link
 749 };
 750
 751 /* called when a packet did not ack after watchdogtimeout */
 752 static void hso_net_tx_timeout(struct net_device *net)
 753 {
 754         struct hso_net *odev = netdev_priv(net);
 755
 756         if (!odev)
 757                 return;
 758
 759         /* Tell syslog we are hosed. */
 760         dev_warn(&net->dev, "Tx timed out.\n");
 761
 762         /* Tear the waiting frame off the list */
 763         if (odev->mux_bulk_tx_urb
 764             && (odev->mux_bulk_tx_urb->status == -EINPROGRESS))
 765                 usb_unlink_urb(odev->mux_bulk_tx_urb);
 766
 767         /* Update statistics */
 768         net->stats.tx_errors++;
 769 }
 770
 771 /* make a real packet from the received USB buffer */
 772 static void packetizeRx(struct hso_net *odev, unsigned char *ip_pkt,
 773                         unsigned int count, unsigned char is_eop)
 774 {
 775         unsigned short temp_bytes;
 776         unsigned short buffer_offset = 0;
 777         unsigned short frame_len;
 778         unsigned char *tmp_rx_buf;
 779
 780         /* log if needed */
 781         D1("Rx %d bytes", count);
 782         DUMP(ip_pkt, min(128, (int)count));
 783
 784         while (count) {
 785                 switch (odev->rx_parse_state) {
 786                 case WAIT_IP:
 787                         /* waiting for IP header. */
 788                         /* wanted bytes - size of ip header */
 789                         temp_bytes =
 790                             (count <
 791                              odev->rx_buf_missing) ? count : odev->
 792                             rx_buf_missing;
 793
 794                         memcpy(((unsigned char *)(&odev->rx_ip_hdr)) +
 795                                odev->rx_buf_size, ip_pkt + buffer_offset,
 796                                temp_bytes);
 797
 798                         odev->rx_buf_size += temp_bytes;
 799                         buffer_offset += temp_bytes;
 800                         odev->rx_buf_missing -= temp_bytes;
 801                         count -= temp_bytes;
 802
 803                         if (!odev->rx_buf_missing) {
 804                                 /* header is complete allocate an sk_buffer and
 805                                  * continue to WAIT_DATA */
 806                                 frame_len = ntohs(odev->rx_ip_hdr.tot_len);
 807
 808                                 if ((frame_len > DEFAULT_MRU) ||
 809                                     (frame_len < sizeof(struct iphdr))) {
 810                                         dev_err(&odev->net->dev,
 811                                                 "Invalid frame (%d) length\n",
 812                                                 frame_len);
 813                                         odev->rx_parse_state = WAIT_SYNC;
 814                                         continue;
 815                                 }
 816                                 /* Allocate an sk_buff */
 817                                 odev->skb_rx_buf = dev_alloc_skb(frame_len);
 818                                 if (!odev->skb_rx_buf) {
 819                                         /* We got no receive buffer. */
 820                                         D1("could not allocate memory");
 821                                         odev->rx_parse_state = WAIT_SYNC;
 822                                         return;
 823                                 }
 824                                 /* Here's where it came from */
 825                                 odev->skb_rx_buf->dev = odev->net;
 826
 827                                 /* Copy what we got so far. make room for iphdr
 828                                  * after tail. */
 829                                 tmp_rx_buf =
 830                                     skb_put(odev->skb_rx_buf,
 831                                             sizeof(struct iphdr));
 832                                 memcpy(tmp_rx_buf, (char *)&(odev->rx_ip_hdr),
 833                                        sizeof(struct iphdr));
 834
 835                                 /* ETH_HLEN */
 836                                 odev->rx_buf_size = sizeof(struct iphdr);
 837
 838                                 /* Filip actually use .tot_len */
 839                                 odev->rx_buf_missing =
 840                                     frame_len - sizeof(struct iphdr);
 841                                 odev->rx_parse_state = WAIT_DATA;
 842                         }
 843                         break;
 844
 845                 case WAIT_DATA:
 846                         temp_bytes = (count < odev->rx_buf_missing)
 847                                         ? count : odev->rx_buf_missing;
 848
 849                         /* Copy the rest of the bytes that are left in the
 850                          * buffer into the waiting sk_buf. */
 851                         /* Make room for temp_bytes after tail. */
 852                         tmp_rx_buf = skb_put(odev->skb_rx_buf, temp_bytes);
 853                         memcpy(tmp_rx_buf, ip_pkt + buffer_offset, temp_bytes);
 854
 855                         odev->rx_buf_missing -= temp_bytes;
 856                         count -= temp_bytes;
 857                         buffer_offset += temp_bytes;
 858                         odev->rx_buf_size += temp_bytes;
 859                         if (!odev->rx_buf_missing) {
 860                                 /* Packet is complete. Inject into stack. */
 861                                 /* We have IP packet here */
 862                                 odev->skb_rx_buf->protocol =
 863                                                 __constant_htons(ETH_P_IP);
 864                                 /* don't check it */
 865                                 odev->skb_rx_buf->ip_summed =
 866                                         CHECKSUM_UNNECESSARY;
 867
 868                                 skb_reset_mac_header(odev->skb_rx_buf);
 869
 870                                 /* Ship it off to the kernel */
 871                                 netif_rx(odev->skb_rx_buf);
 872                                 /* No longer our buffer. */
 873                                 odev->skb_rx_buf = NULL;
 874
 875                                 /* update out statistics */
 876                                 odev->net->stats.rx_packets++;
 877
 878                                 odev->net->stats.rx_bytes += odev->rx_buf_size;
 879
 880                                 odev->rx_buf_size = 0;
 881                                 odev->rx_buf_missing = sizeof(struct iphdr);
 882                                 odev->rx_parse_state = WAIT_IP;
 883                         }
 884                         break;
 885
 886                 case WAIT_SYNC:
 887                         D1(" W_S");
 888                         count = 0;
 889                         break;
 890                 default:
 891                         D1(" ");
 892                         count--;
 893                         break;
 894                 }
 895         }
 896
 897         /* Recovery mechanism for WAIT_SYNC state. */
 898         if (is_eop) {
 899                 if (odev->rx_parse_state == WAIT_SYNC) {
 900                         odev->rx_parse_state = WAIT_IP;
 901                         odev->rx_buf_size = 0;
 902                         odev->rx_buf_missing = sizeof(struct iphdr);
 903                 }
 904         }
 905 }
 906
 907 /* Moving data from usb to kernel (in interrupt state) */
 908 static void read_bulk_callback(struct urb *urb)
 909 {
 910         struct hso_net *odev = urb->context;
 911         struct net_device *net;
 912         int result;
 913         int status = urb->status;
 914
 915         /* is al ok?  (Filip: Who's Al ?) */
 916         if (status) {
 917                 log_usb_status(status, __func__);
 918                 return;
 919         }
 920
 921         /* Sanity check */
 922         if (!odev || !test_bit(HSO_NET_RUNNING, &odev->flags)) {
 923                 D1("BULK IN callback but driver is not active!");
 924                 return;
 925         }
 926         usb_mark_last_busy(urb->dev);
 927
 928         net = odev->net;
 929
 930         if (!netif_device_present(net)) {
 931                 /* Somebody killed our network interface... */
 932                 return;
 933         }
 934
 935         if (odev->parent->port_spec & HSO_INFO_CRC_BUG) {
 936                 u32 rest;
 937                 u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
 938                 rest = urb->actual_length % odev->in_endp->wMaxPacketSize;
 939                 if (((rest == 5) || (rest == 6))
 940                     && !memcmp(((u8 *) urb->transfer_buffer) +
 941                                urb->actual_length - 4, crc_check, 4)) {
 942                         urb->actual_length -= 4;
 943                 }
 944         }
 945
 946         /* do we even have a packet? */
 947         if (urb->actual_length) {
 948                 /* Handle the IP stream, add header and push it onto network
 949                  * stack if the packet is complete. */
 950                 spin_lock(&odev->net_lock);
 951                 packetizeRx(odev, urb->transfer_buffer, urb->actual_length,
 952                             (urb->transfer_buffer_length >
 953                              urb->actual_length) ? 1 : 0);
 954                 spin_unlock(&odev->net_lock);
 955         }
 956
 957         /* We are done with this URB, resubmit it. Prep the USB to wait for
 958          * another frame. Reuse same as received. */
 959         usb_fill_bulk_urb(urb,
 960                           odev->parent->usb,
 961                           usb_rcvbulkpipe(odev->parent->usb,
 962                                           odev->in_endp->
 963                                           bEndpointAddress & 0x7F),
 964                           urb->transfer_buffer, MUX_BULK_RX_BUF_SIZE,
 965                           read_bulk_callback, odev);
 966
 967         /* Give this to the USB subsystem so it can tell us when more data
 968          * arrives. */
 969         result = usb_submit_urb(urb, GFP_ATOMIC);
 970         if (result)
 971                 dev_warn(&odev->parent->interface->dev,
 972                          "%s failed submit mux_bulk_rx_urb %d", __func__,
 973                          result);
 974 }
 975
 976 /* Serial driver functions */
 977
 978 static void _hso_serial_set_termios(struct tty_struct *tty,
 979                                     struct ktermios *old)
 980 {
 981         struct hso_serial *serial = get_serial_by_tty(tty);
 982         struct ktermios *termios;
 983
 984         if ((!tty) || (!tty->termios) || (!serial)) {
 985                 printk(KERN_ERR "%s: no tty structures", __func__);
 986                 return;
 987         }
 988
 989         D4("port %d", serial->minor);
 990
 991         /*
 992          * The default requirements for this device are:
 993          */
 994         termios = tty->termios;
 995         termios->c_iflag &=
 996                 ~(IGNBRK        /* disable ignore break */
 997                 | BRKINT        /* disable break causes interrupt */
 998                 | PARMRK        /* disable mark parity errors */
 999                 | ISTRIP        /* disable clear high bit of input characters */
1000                 | INLCR         /* disable translate NL to CR */
1001                 | IGNCR         /* disable ignore CR */
1002                 | ICRNL         /* disable translate CR to NL */
1003                 | IXON);        /* disable enable XON/XOFF flow control */
1004
1005         /* disable postprocess output characters */
1006         termios->c_oflag &= ~OPOST;
1007
1008         termios->c_lflag &=
1009                 ~(ECHO          /* disable echo input characters */
1010                 | ECHONL        /* disable echo new line */
1011                 | ICANON        /* disable erase, kill, werase, and rprnt
1012                                    special characters */
1013                 | ISIG          /* disable interrupt, quit, and suspend special
1014                                    characters */
1015                 | IEXTEN);      /* disable non-POSIX special characters */
1016
1017         termios->c_cflag &=
1018                 ~(CSIZE         /* no size */
1019                 | PARENB        /* disable parity bit */
1020                 | CBAUD         /* clear current baud rate */
1021                 | CBAUDEX);     /* clear current buad rate */
1022
1023         termios->c_cflag |= CS8;        /* character size 8 bits */
1024
1025         /* baud rate 115200 */
1026         tty_encode_baud_rate(serial->tty, 115200, 115200);
1027
1028         /*
1029          * Force low_latency on; otherwise the pushes are scheduled;
1030          * this is bad as it opens up the possibility of dropping bytes
1031          * on the floor.  We don't want to drop bytes on the floor. :)
1032          */
1033         serial->tty->low_latency = 1;
1034         return;
1035 }
1036
1037 /* open the requested serial port */
1038 static int hso_serial_open(struct tty_struct *tty, struct file *filp)
1039 {
1040         struct hso_serial *serial = get_serial_by_index(tty->index);
1041         int result;
1042
1043         /* sanity check */
1044         if (serial == NULL || serial->magic != HSO_SERIAL_MAGIC) {
1045                 tty->driver_data = NULL;
1046                 D1("Failed to open port");
1047                 return -ENODEV;
1048         }
1049
1050         mutex_lock(&serial->parent->mutex);
1051         result = usb_autopm_get_interface(serial->parent->interface);
1052         if (result < 0)
1053                 goto err_out;
1054
1055         D1("Opening %d", serial->minor);
1056         kref_get(&serial->parent->ref);
1057
1058         /* setup */
1059         tty->driver_data = serial;
1060         serial->tty = tty;
1061
1062         /* check for port allready opened, if not set the termios */
1063         serial->open_count++;
1064         if (serial->open_count == 1) {
1065                 tty->low_latency = 1;
1066                 serial->flags = 0;
1067                 /* Force default termio settings */
1068                 _hso_serial_set_termios(tty, NULL);
1069                 result = hso_start_serial_device(serial->parent, GFP_KERNEL);
1070                 if (result) {
1071                         hso_stop_serial_device(serial->parent);
1072                         serial->open_count--;
1073                         kref_put(&serial->parent->ref, hso_serial_ref_free);
1074                 }
1075         } else {
1076                 D1("Port was already open");
1077         }
1078
1079         usb_autopm_put_interface(serial->parent->interface);
1080
1081         /* done */
1082         if (result)
1083                 hso_serial_tiocmset(tty, NULL, TIOCM_RTS | TIOCM_DTR, 0);
1084 err_out:
1085         mutex_unlock(&serial->parent->mutex);
1086         return result;
1087 }
1088
1089 /* close the requested serial port */
1090 static void hso_serial_close(struct tty_struct *tty, struct file *filp)
1091 {
1092         struct hso_serial *serial = tty->driver_data;
1093         u8 usb_gone;
1094
1095         D1("Closing serial port");
1096
1097         mutex_lock(&serial->parent->mutex);
1098         usb_gone = serial->parent->usb_gone;
1099
1100         if (!usb_gone)
1101                 usb_autopm_get_interface(serial->parent->interface);
1102
1103         /* reset the rts and dtr */
1104         /* do the actual close */
1105         serial->open_count--;
1106         if (serial->open_count <= 0) {
1107                 kref_put(&serial->parent->ref, hso_serial_ref_free);
1108                 serial->open_count = 0;
1109                 if (serial->tty) {
1110                         serial->tty->driver_data = NULL;
1111                         serial->tty = NULL;
1112                 }
1113                 if (!usb_gone)
1114                         hso_stop_serial_device(serial->parent);
1115         }
1116         if (!usb_gone)
1117                 usb_autopm_put_interface(serial->parent->interface);
1118         mutex_unlock(&serial->parent->mutex);
1119 }
1120
1121 /* close the requested serial port */
1122 static int hso_serial_write(struct tty_struct *tty, const unsigned char *buf,
1123                             int count)
1124 {
1125         struct hso_serial *serial = get_serial_by_tty(tty);
1126         int space, tx_bytes;
1127         unsigned long flags;
1128
1129         /* sanity check */
1130         if (serial == NULL) {
1131                 printk(KERN_ERR "%s: serial is NULL\n", __func__);
1132                 return -ENODEV;
1133         }
1134
1135         spin_lock_irqsave(&serial->serial_lock, flags);
1136
1137         space = serial->tx_data_length - serial->tx_buffer_count;
1138         tx_bytes = (count < space) ? count : space;
1139
1140         if (!tx_bytes)
1141                 goto out;
1142
1143         memcpy(serial->tx_buffer + serial->tx_buffer_count, buf, tx_bytes);
1144         serial->tx_buffer_count += tx_bytes;
1145
1146 out:
1147         spin_unlock_irqrestore(&serial->serial_lock, flags);
1148
1149         hso_kick_transmit(serial);
1150         /* done */
1151         return tx_bytes;
1152 }
1153
1154 /* how much room is there for writing */
1155 static int hso_serial_write_room(struct tty_struct *tty)
1156 {
1157         struct hso_serial *serial = get_serial_by_tty(tty);
1158         int room;
1159         unsigned long flags;
1160
1161         spin_lock_irqsave(&serial->serial_lock, flags);
1162         room = serial->tx_data_length - serial->tx_buffer_count;
1163         spin_unlock_irqrestore(&serial->serial_lock, flags);
1164
1165         /* return free room */
1166         return room;
1167 }
1168
1169 /* setup the term */
1170 static void hso_serial_set_termios(struct tty_struct *tty, struct ktermios *old)
1171 {
1172         struct hso_serial *serial = get_serial_by_tty(tty);
1173         unsigned long flags;
1174
1175         if (old)
1176                 D5("Termios called with: cflags new[%d] - old[%d]",
1177                    tty->termios->c_cflag, old->c_cflag);
1178
1179         /* the actual setup */
1180         spin_lock_irqsave(&serial->serial_lock, flags);
1181         if (serial->open_count)
1182                 _hso_serial_set_termios(tty, old);
1183         else
1184                 tty->termios = old;
1185         spin_unlock_irqrestore(&serial->serial_lock, flags);
1186
1187         /* done */
1188         return;
1189 }
1190
1191 /* how many characters in the buffer */
1192 static int hso_serial_chars_in_buffer(struct tty_struct *tty)
1193 {
1194         struct hso_serial *serial = get_serial_by_tty(tty);
1195         int chars;
1196         unsigned long flags;
1197
1198         /* sanity check */
1199         if (serial == NULL)
1200                 return 0;
1201
1202         spin_lock_irqsave(&serial->serial_lock, flags);
1203         chars = serial->tx_buffer_count;
1204         spin_unlock_irqrestore(&serial->serial_lock, flags);
1205
1206         return chars;
1207 }
1208
1209 static int hso_serial_tiocmget(struct tty_struct *tty, struct file *file)
1210 {
1211         unsigned int value;
1212         struct hso_serial *serial = get_serial_by_tty(tty);
1213         unsigned long flags;
1214
1215         /* sanity check */
1216         if (!serial) {
1217                 D1("no tty structures");
1218                 return -EINVAL;
1219         }
1220
1221         spin_lock_irqsave(&serial->serial_lock, flags);
1222         value = ((serial->rts_state) ? TIOCM_RTS : 0) |
1223             ((serial->dtr_state) ? TIOCM_DTR : 0);
1224         spin_unlock_irqrestore(&serial->serial_lock, flags);
1225
1226         return value;
1227 }
1228
1229 static int hso_serial_tiocmset(struct tty_struct *tty, struct file *file,
1230                                unsigned int set, unsigned int clear)
1231 {
1232         int val = 0;
1233         unsigned long flags;
1234         int if_num;
1235         struct hso_serial *serial = get_serial_by_tty(tty);
1236
1237         /* sanity check */
1238         if (!serial) {
1239                 D1("no tty structures");
1240                 return -EINVAL;
1241         }
1242         if_num = serial->parent->interface->altsetting->desc.bInterfaceNumber;
1243
1244         spin_lock_irqsave(&serial->serial_lock, flags);
1245         if (set & TIOCM_RTS)
1246                 serial->rts_state = 1;
1247         if (set & TIOCM_DTR)
1248                 serial->dtr_state = 1;
1249
1250         if (clear & TIOCM_RTS)
1251                 serial->rts_state = 0;
1252         if (clear & TIOCM_DTR)
1253                 serial->dtr_state = 0;
1254
1255         if (serial->dtr_state)
1256                 val |= 0x01;
1257         if (serial->rts_state)
1258                 val |= 0x02;
1259
1260         spin_unlock_irqrestore(&serial->serial_lock, flags);
1261
1262         return usb_control_msg(serial->parent->usb,
1263                                usb_rcvctrlpipe(serial->parent->usb, 0), 0x22,
1264                                0x21, val, if_num, NULL, 0,
1265                                USB_CTRL_SET_TIMEOUT);
1266 }
1267
1268 /* starts a transmit */
1269 static void hso_kick_transmit(struct hso_serial *serial)
1270 {
1271         u8 *temp;
1272         unsigned long flags;
1273         int res;
1274
1275         spin_lock_irqsave(&serial->serial_lock, flags);
1276         if (!serial->tx_buffer_count)
1277                 goto out;
1278
1279         if (serial->tx_urb_used)
1280                 goto out;
1281
1282         /* Wakeup USB interface if necessary */
1283         if (hso_get_activity(serial->parent) == -EAGAIN)
1284                 goto out;
1285
1286         /* Switch pointers around to avoid memcpy */
1287         temp = serial->tx_buffer;
1288         serial->tx_buffer = serial->tx_data;
1289         serial->tx_data = temp;
1290         serial->tx_data_count = serial->tx_buffer_count;
1291         serial->tx_buffer_count = 0;
1292
1293         /* If temp is set, it means we switched buffers */
1294         if (temp && serial->write_data) {
1295                 res = serial->write_data(serial);
1296                 if (res >= 0)
1297                         serial->tx_urb_used = 1;
1298         }
1299 out:
1300         spin_unlock_irqrestore(&serial->serial_lock, flags);
1301 }
1302
1303 /* make a request (for reading and writing data to muxed serial port) */
1304 static int mux_device_request(struct hso_serial *serial, u8 type, u16 port,
1305                               struct urb *ctrl_urb,
1306                               struct usb_ctrlrequest *ctrl_req,
1307                               u8 *ctrl_urb_data, u32 size)
1308 {
1309         int result;
1310         int pipe;
1311
1312         /* Sanity check */
1313         if (!serial || !ctrl_urb || !ctrl_req) {
1314                 printk(KERN_ERR "%s: Wrong arguments\n", __func__);
1315                 return -EINVAL;
1316         }
1317
1318         /* initialize */
1319         ctrl_req->wValue = 0;
1320         ctrl_req->wIndex = hso_port_to_mux(port);
1321         ctrl_req->wLength = size;
1322
1323         if (type == USB_CDC_GET_ENCAPSULATED_RESPONSE) {
1324                 /* Reading command */
1325                 ctrl_req->bRequestType = USB_DIR_IN |
1326                                          USB_TYPE_OPTION_VENDOR |
1327                                          USB_RECIP_INTERFACE;
1328                 ctrl_req->bRequest = USB_CDC_GET_ENCAPSULATED_RESPONSE;
1329                 pipe = usb_rcvctrlpipe(serial->parent->usb, 0);
1330         } else {
1331                 /* Writing command */
1332                 ctrl_req->bRequestType = USB_DIR_OUT |
1333                                          USB_TYPE_OPTION_VENDOR |
1334                                          USB_RECIP_INTERFACE;
1335                 ctrl_req->bRequest = USB_CDC_SEND_ENCAPSULATED_COMMAND;
1336                 pipe = usb_sndctrlpipe(serial->parent->usb, 0);
1337         }
1338         /* syslog */
1339         D2("%s command (%02x) len: %d, port: %d",
1340            type == USB_CDC_GET_ENCAPSULATED_RESPONSE ? "Read" : "Write",
1341            ctrl_req->bRequestType, ctrl_req->wLength, port);
1342
1343         /* Load ctrl urb */
1344         ctrl_urb->transfer_flags = 0;
1345         usb_fill_control_urb(ctrl_urb,
1346                              serial->parent->usb,
1347                              pipe,
1348                              (u8 *) ctrl_req,
1349                              ctrl_urb_data, size, ctrl_callback, serial);
1350         /* Send it on merry way */
1351         result = usb_submit_urb(ctrl_urb, GFP_ATOMIC);
1352         if (result) {
1353                 dev_err(&ctrl_urb->dev->dev,
1354                         "%s failed submit ctrl_urb %d type %d", __func__,
1355                         result, type);
1356                 return result;
1357         }
1358
1359         /* done */
1360         return size;
1361 }
1362
1363 /* called by intr_callback when read occurs */
1364 static int hso_mux_serial_read(struct hso_serial *serial)
1365 {
1366         if (!serial)
1367                 return -EINVAL;
1368
1369         /* clean data */
1370         memset(serial->rx_data[0], 0, CTRL_URB_RX_SIZE);
1371         /* make the request */
1372
1373         if (serial->num_rx_urbs != 1) {
1374                 dev_err(&serial->parent->interface->dev,
1375                         "ERROR: mux'd reads with multiple buffers "
1376                         "not possible\n");
1377                 return 0;
1378         }
1379         return mux_device_request(serial,
1380                                   USB_CDC_GET_ENCAPSULATED_RESPONSE,
1381                                   serial->parent->port_spec & HSO_PORT_MASK,
1382                                   serial->rx_urb[0],
1383                                   &serial->ctrl_req_rx,
1384                                   serial->rx_data[0], serial->rx_data_length);
1385 }
1386
1387 /* used for muxed serial port callback (muxed serial read) */
1388 static void intr_callback(struct urb *urb)
1389 {
1390         struct hso_shared_int *shared_int = urb->context;
1391         struct hso_serial *serial;
1392         unsigned char *port_req;
1393         int status = urb->status;
1394         int i;
1395
1396         usb_mark_last_busy(urb->dev);
1397
1398         /* sanity check */
1399         if (!shared_int)
1400                 return;
1401
1402         /* status check */
1403         if (status) {
1404                 log_usb_status(status, __func__);
1405                 return;
1406         }
1407         D4("\n--- Got intr callback 0x%02X ---", status);
1408
1409         /* what request? */
1410         port_req = urb->transfer_buffer;
1411         D4(" port_req = 0x%.2X\n", *port_req);
1412         /* loop over all muxed ports to find the one sending this */
1413         for (i = 0; i < 8; i++) {
1414                 /* max 8 channels on MUX */
1415                 if (*port_req & (1 << i)) {
1416                         serial = get_serial_by_shared_int_and_type(shared_int,
1417                                                                    (1 << i));
1418                         if (serial != NULL) {
1419                                 D1("Pending read interrupt on port %d\n", i);
1420                                 if (!test_and_set_bit(HSO_SERIAL_FLAG_RX_SENT,
1421                                                       &serial->flags)) {
1422                                         /* Setup and send a ctrl req read on
1423                                          * port i */
1424                                         hso_mux_serial_read(serial);
1425                                 } else {
1426                                         D1("Already pending a read on "
1427                                            "port %d\n", i);
1428                                 }
1429                         }
1430                 }
1431         }
1432         /* Resubmit interrupt urb */
1433         hso_mux_submit_intr_urb(shared_int, urb->dev, GFP_ATOMIC);
1434 }
1435
1436 /* called for writing to muxed serial port */
1437 static int hso_mux_serial_write_data(struct hso_serial *serial)
1438 {
1439         if (NULL == serial)
1440                 return -EINVAL;
1441
1442         return mux_device_request(serial,
1443                                   USB_CDC_SEND_ENCAPSULATED_COMMAND,
1444                                   serial->parent->port_spec & HSO_PORT_MASK,
1445                                   serial->tx_urb,
1446                                   &serial->ctrl_req_tx,
1447                                   serial->tx_data, serial->tx_data_count);
1448 }
1449
1450 /* write callback for Diag and CS port */
1451 static void hso_std_serial_write_bulk_callback(struct urb *urb)
1452 {
1453         struct hso_serial *serial = urb->context;
1454         int status = urb->status;
1455
1456         /* sanity check */
1457         if (!serial) {
1458                 D1("serial == NULL");
1459                 return;
1460         }
1461
1462         spin_lock(&serial->serial_lock);
1463         serial->tx_urb_used = 0;
1464         spin_unlock(&serial->serial_lock);
1465         if (status) {
1466                 log_usb_status(status, __func__);
1467                 return;
1468         }
1469         hso_put_activity(serial->parent);
1470         tty_wakeup(serial->tty);
1471         hso_kick_transmit(serial);
1472
1473         D1(" ");
1474         return;
1475 }
1476
1477 /* called for writing diag or CS serial port */
1478 static int hso_std_serial_write_data(struct hso_serial *serial)
1479 {
1480         int count = serial->tx_data_count;
1481         int result;
1482
1483         usb_fill_bulk_urb(serial->tx_urb,
1484                           serial->parent->usb,
1485                           usb_sndbulkpipe(serial->parent->usb,
1486                                           serial->out_endp->
1487                                           bEndpointAddress & 0x7F),
1488                           serial->tx_data, serial->tx_data_count,
1489                           hso_std_serial_write_bulk_callback, serial);
1490
1491         result = usb_submit_urb(serial->tx_urb, GFP_ATOMIC);
1492         if (result) {
1493                 dev_warn(&serial->parent->usb->dev,
1494                          "Failed to submit urb - res %d\n", result);
1495                 return result;
1496         }
1497
1498         return count;
1499 }
1500
1501 /* callback after read or write on muxed serial port */
1502 static void ctrl_callback(struct urb *urb)
1503 {
1504         struct hso_serial *serial = urb->context;
1505         struct usb_ctrlrequest *req;
1506         int status = urb->status;
1507
1508         /* sanity check */
1509         if (!serial)
1510                 return;
1511
1512         spin_lock(&serial->serial_lock);
1513         serial->tx_urb_used = 0;
1514         spin_unlock(&serial->serial_lock);
1515         if (status) {
1516                 log_usb_status(status, __func__);
1517                 return;
1518         }
1519
1520         /* what request? */
1521         req = (struct usb_ctrlrequest *)(urb->setup_packet);
1522         D4("\n--- Got muxed ctrl callback 0x%02X ---", status);
1523         D4("Actual length of urb = %d\n", urb->actual_length);
1524         DUMP1(urb->transfer_buffer, urb->actual_length);
1525
1526         if (req->bRequestType ==
1527             (USB_DIR_IN | USB_TYPE_OPTION_VENDOR | USB_RECIP_INTERFACE)) {
1528                 /* response to a read command */
1529                 if (serial->open_count > 0) {
1530                         /* handle RX data the normal way */
1531                         put_rxbuf_data(urb, serial);
1532                 }
1533
1534                 /* Re issue a read as long as we receive data. */
1535                 if (urb->actual_length != 0)
1536                         hso_mux_serial_read(serial);
1537                 else
1538                         clear_bit(HSO_SERIAL_FLAG_RX_SENT, &serial->flags);
1539         } else {
1540                 hso_put_activity(serial->parent);
1541                 tty_wakeup(serial->tty);
1542                 /* response to a write command */
1543                 hso_kick_transmit(serial);
1544         }
1545 }
1546
1547 /* handle RX data for serial port */
1548 static void put_rxbuf_data(struct urb *urb, struct hso_serial *serial)
1549 {
1550         struct tty_struct *tty = serial->tty;
1551
1552         /* Sanity check */
1553         if (urb == NULL || serial == NULL) {
1554                 D1("serial = NULL");
1555                 return;
1556         }
1557
1558         /* Push data to tty */
1559         if (tty && urb->actual_length) {
1560                 D1("data to push to tty");
1561                 tty_insert_flip_string(tty, urb->transfer_buffer,
1562                                        urb->actual_length);
1563                 tty_flip_buffer_push(tty);
1564         }
1565 }
1566
1567 /* read callback for Diag and CS port */
1568 static void hso_std_serial_read_bulk_callback(struct urb *urb)
1569 {
1570         struct hso_serial *serial = urb->context;
1571         int result;
1572         int status = urb->status;
1573
1574         /* sanity check */
1575         if (!serial) {
1576                 D1("serial == NULL");
1577                 return;
1578         } else if (status) {
1579                 log_usb_status(status, __func__);
1580                 return;
1581         }
1582
1583         D4("\n--- Got serial_read_bulk callback %02x ---", status);
1584         D1("Actual length = %d\n", urb->actual_length);
1585         DUMP1(urb->transfer_buffer, urb->actual_length);
1586
1587         /* Anyone listening? */
1588         if (serial->open_count == 0)
1589                 return;
1590
1591         if (status == 0) {
1592                 if (serial->parent->port_spec & HSO_INFO_CRC_BUG) {
1593                         u32 rest;
1594                         u8 crc_check[4] = { 0xDE, 0xAD, 0xBE, 0xEF };
1595                         rest =
1596                             urb->actual_length %
1597                             serial->in_endp->wMaxPacketSize;
1598                         if (((rest == 5) || (rest == 6))
1599                             && !memcmp(((u8 *) urb->transfer_buffer) +
1600                                        urb->actual_length - 4, crc_check, 4)) {
1601                                 urb->actual_length -= 4;
1602                         }
1603                 }
1604                 /* Valid data, handle RX data */
1605                 put_rxbuf_data(urb, serial);
1606         } else if (status == -ENOENT || status == -ECONNRESET) {
1607                 /* Unlinked - check for throttled port. */
1608                 D2("Port %d, successfully unlinked urb", serial->minor);
1609         } else {
1610                 D2("Port %d, status = %d for read urb", serial->minor, status);
1611                 return;
1612         }
1613
1614         usb_mark_last_busy(urb->dev);
1615
1616         /* We are done with this URB, resubmit it. Prep the USB to wait for
1617          * another frame */
1618         usb_fill_bulk_urb(urb, serial->parent->usb,
1619                           usb_rcvbulkpipe(serial->parent->usb,
1620                                           serial->in_endp->
1621                                           bEndpointAddress & 0x7F),
1622                           urb->transfer_buffer, serial->rx_data_length,
1623                           hso_std_serial_read_bulk_callback, serial);
1624         /* Give this to the USB subsystem so it can tell us when more data
1625          * arrives. */
1626         result = usb_submit_urb(urb, GFP_ATOMIC);
1627         if (result) {
1628                 dev_err(&urb->dev->dev, "%s failed submit serial rx_urb %d",
1629                         __func__, result);
1630         }
1631 }
1632
1633 /* Base driver functions */
1634
1635 static void hso_log_port(struct hso_device *hso_dev)
1636 {
1637         char *port_type;
1638         char port_dev[20];
1639
1640         switch (hso_dev->port_spec & HSO_PORT_MASK) {
1641         case HSO_PORT_CONTROL:
1642                 port_type = "Control";
1643                 break;
1644         case HSO_PORT_APP:
1645                 port_type = "Application";
1646                 break;
1647         case HSO_PORT_GPS:
1648                 port_type = "GPS";
1649                 break;
1650         case HSO_PORT_GPS_CONTROL:
1651                 port_type = "GPS control";
1652                 break;
1653         case HSO_PORT_APP2:
1654                 port_type = "Application2";
1655                 break;
1656         case HSO_PORT_PCSC:
1657                 port_type = "PCSC";
1658                 break;
1659         case HSO_PORT_DIAG:
1660                 port_type = "Diagnostic";
1661                 break;
1662         case HSO_PORT_DIAG2:
1663                 port_type = "Diagnostic2";
1664                 break;
1665         case HSO_PORT_MODEM:
1666                 port_type = "Modem";
1667                 break;
1668         case HSO_PORT_NETWORK:
1669                 port_type = "Network";
1670                 break;
1671         default:
1672                 port_type = "Unknown";
1673                 break;
1674         }
1675         if ((hso_dev->port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
1676                 sprintf(port_dev, "%s", dev2net(hso_dev)->net->name);
1677         } else
1678                 sprintf(port_dev, "/dev/%s%d", tty_filename,
1679                         dev2ser(hso_dev)->minor);
1680
1681         dev_dbg(&hso_dev->interface->dev, "HSO: Found %s port %s\n",
1682                 port_type, port_dev);
1683 }
1684
1685 static int hso_start_net_device(struct hso_device *hso_dev)
1686 {
1687         int i, result = 0;
1688         struct hso_net *hso_net = dev2net(hso_dev);
1689
1690         if (!hso_net)
1691                 return -ENODEV;
1692
1693         /* send URBs for all read buffers */
1694         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1695
1696                 /* Prep a receive URB */
1697                 usb_fill_bulk_urb(hso_net->mux_bulk_rx_urb_pool[i],
1698                                   hso_dev->usb,
1699                                   usb_rcvbulkpipe(hso_dev->usb,
1700                                                   hso_net->in_endp->
1701                                                   bEndpointAddress & 0x7F),
1702                                   hso_net->mux_bulk_rx_buf_pool[i],
1703                                   MUX_BULK_RX_BUF_SIZE, read_bulk_callback,
1704                                   hso_net);
1705
1706                 /* Put it out there so the device can send us stuff */
1707                 result = usb_submit_urb(hso_net->mux_bulk_rx_urb_pool[i],
1708                                         GFP_NOIO);
1709                 if (result)
1710                         dev_warn(&hso_dev->usb->dev,
1711                                 "%s failed mux_bulk_rx_urb[%d] %d\n", __func__,
1712                                 i, result);
1713         }
1714
1715         return result;
1716 }
1717
1718 static int hso_stop_net_device(struct hso_device *hso_dev)
1719 {
1720         int i;
1721         struct hso_net *hso_net = dev2net(hso_dev);
1722
1723         if (!hso_net)
1724                 return -ENODEV;
1725
1726         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1727                 if (hso_net->mux_bulk_rx_urb_pool[i])
1728                         usb_kill_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1729
1730         }
1731         if (hso_net->mux_bulk_tx_urb)
1732                 usb_kill_urb(hso_net->mux_bulk_tx_urb);
1733
1734         return 0;
1735 }
1736
1737 static int hso_start_serial_device(struct hso_device *hso_dev, gfp_t flags)
1738 {
1739         int i, result = 0;
1740         struct hso_serial *serial = dev2ser(hso_dev);
1741
1742         if (!serial)
1743                 return -ENODEV;
1744
1745         /* If it is not the MUX port fill in and submit a bulk urb (already
1746          * allocated in hso_serial_start) */
1747         if (!(serial->parent->port_spec & HSO_INTF_MUX)) {
1748                 for (i = 0; i < serial->num_rx_urbs; i++) {
1749                         usb_fill_bulk_urb(serial->rx_urb[i],
1750                                           serial->parent->usb,
1751                                           usb_rcvbulkpipe(serial->parent->usb,
1752                                                           serial->in_endp->
1753                                                           bEndpointAddress &
1754                                                           0x7F),
1755                                           serial->rx_data[i],
1756                                           serial->rx_data_length,
1757                                           hso_std_serial_read_bulk_callback,
1758                                           serial);
1759                         result = usb_submit_urb(serial->rx_urb[i], flags);
1760                         if (result) {
1761                                 dev_warn(&serial->parent->usb->dev,
1762                                          "Failed to submit urb - res %d\n",
1763                                          result);
1764                                 break;
1765                         }
1766                 }
1767         } else {
1768                 mutex_lock(&serial->shared_int->shared_int_lock);
1769                 if (!serial->shared_int->use_count) {
1770                         result =
1771                             hso_mux_submit_intr_urb(serial->shared_int,
1772                                                     hso_dev->usb, flags);
1773                 }
1774                 serial->shared_int->use_count++;
1775                 mutex_unlock(&serial->shared_int->shared_int_lock);
1776         }
1777
1778         return result;
1779 }
1780
1781 static int hso_stop_serial_device(struct hso_device *hso_dev)
1782 {
1783         int i;
1784         struct hso_serial *serial = dev2ser(hso_dev);
1785
1786         if (!serial)
1787                 return -ENODEV;
1788
1789         for (i = 0; i < serial->num_rx_urbs; i++) {
1790                 if (serial->rx_urb[i])
1791                                 usb_kill_urb(serial->rx_urb[i]);
1792         }
1793
1794         if (serial->tx_urb)
1795                 usb_kill_urb(serial->tx_urb);
1796
1797         if (serial->shared_int) {
1798                 mutex_lock(&serial->shared_int->shared_int_lock);
1799                 if (serial->shared_int->use_count &&
1800                     (--serial->shared_int->use_count == 0)) {
1801                         struct urb *urb;
1802
1803                         urb = serial->shared_int->shared_intr_urb;
1804                         if (urb)
1805                                 usb_kill_urb(urb);
1806                 }
1807                 mutex_unlock(&serial->shared_int->shared_int_lock);
1808         }
1809
1810         return 0;
1811 }
1812
1813 static void hso_serial_common_free(struct hso_serial *serial)
1814 {
1815         int i;
1816
1817         if (serial->parent->dev)
1818                 device_remove_file(serial->parent->dev, &dev_attr_hsotype);
1819
1820         tty_unregister_device(tty_drv, serial->minor);
1821
1822         for (i = 0; i < serial->num_rx_urbs; i++) {
1823                 /* unlink and free RX URB */
1824                 usb_free_urb(serial->rx_urb[i]);
1825                 /* free the RX buffer */
1826                 kfree(serial->rx_data[i]);
1827         }
1828
1829         /* unlink and free TX URB */
1830         usb_free_urb(serial->tx_urb);
1831         kfree(serial->tx_data);
1832 }
1833
1834 static int hso_serial_common_create(struct hso_serial *serial, int num_urbs,
1835                                     int rx_size, int tx_size)
1836 {
1837         struct device *dev;
1838         int minor;
1839         int i;
1840
1841         minor = get_free_serial_index();
1842         if (minor < 0)
1843                 goto exit;
1844
1845         /* register our minor number */
1846         serial->parent->dev = tty_register_device(tty_drv, minor,
1847                                         &serial->parent->interface->dev);
1848         dev = serial->parent->dev;
1849         dev->driver_data = serial->parent;
1850         i = device_create_file(dev, &dev_attr_hsotype);
1851
1852         /* fill in specific data for later use */
1853         serial->minor = minor;
1854         serial->magic = HSO_SERIAL_MAGIC;
1855         spin_lock_init(&serial->serial_lock);
1856         serial->num_rx_urbs = num_urbs;
1857
1858         /* RX, allocate urb and initialize */
1859
1860         /* prepare our RX buffer */
1861         serial->rx_data_length = rx_size;
1862         for (i = 0; i < serial->num_rx_urbs; i++) {
1863                 serial->rx_urb[i] = usb_alloc_urb(0, GFP_KERNEL);
1864                 if (!serial->rx_urb[i]) {
1865                         dev_err(dev, "Could not allocate urb?\n");
1866                         goto exit;
1867                 }
1868                 serial->rx_urb[i]->transfer_buffer = NULL;
1869                 serial->rx_urb[i]->transfer_buffer_length = 0;
1870                 serial->rx_data[i] = kzalloc(serial->rx_data_length,
1871                                              GFP_KERNEL);
1872                 if (!serial->rx_data[i]) {
1873                         dev_err(dev, "%s - Out of memory\n", __func__);
1874                         goto exit;
1875                 }
1876         }
1877
1878         /* TX, allocate urb and initialize */
1879         serial->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1880         if (!serial->tx_urb) {
1881                 dev_err(dev, "Could not allocate urb?\n");
1882                 goto exit;
1883         }
1884         serial->tx_urb->transfer_buffer = NULL;
1885         serial->tx_urb->transfer_buffer_length = 0;
1886         /* prepare our TX buffer */
1887         serial->tx_data_count = 0;
1888         serial->tx_buffer_count = 0;
1889         serial->tx_data_length = tx_size;
1890         serial->tx_data = kzalloc(serial->tx_data_length, GFP_KERNEL);
1891         if (!serial->tx_data) {
1892                 dev_err(dev, "%s - Out of memory", __func__);
1893                 goto exit;
1894         }
1895         serial->tx_buffer = kzalloc(serial->tx_data_length, GFP_KERNEL);
1896         if (!serial->tx_buffer) {
1897                 dev_err(dev, "%s - Out of memory", __func__);
1898                 goto exit;
1899         }
1900
1901         return 0;
1902 exit:
1903         hso_serial_common_free(serial);
1904         return -1;
1905 }
1906
1907 /* Frees a general hso device */
1908 static void hso_free_device(struct hso_device *hso_dev)
1909 {
1910         kfree(hso_dev);
1911 }
1912
1913 /* Creates a general hso device */
1914 static struct hso_device *hso_create_device(struct usb_interface *intf,
1915                                             int port_spec)
1916 {
1917         struct hso_device *hso_dev;
1918
1919         hso_dev = kzalloc(sizeof(*hso_dev), GFP_ATOMIC);
1920         if (!hso_dev)
1921                 return NULL;
1922
1923         hso_dev->port_spec = port_spec;
1924         hso_dev->usb = interface_to_usbdev(intf);
1925         hso_dev->interface = intf;
1926         kref_init(&hso_dev->ref);
1927         mutex_init(&hso_dev->mutex);
1928
1929         INIT_WORK(&hso_dev->async_get_intf, async_get_intf);
1930         INIT_WORK(&hso_dev->async_put_intf, async_put_intf);
1931
1932         return hso_dev;
1933 }
1934
1935 /* Removes a network device in the network device table */
1936 static int remove_net_device(struct hso_device *hso_dev)
1937 {
1938         int i;
1939
1940         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
1941                 if (network_table[i] == hso_dev) {
1942                         network_table[i] = NULL;
1943                         break;
1944                 }
1945         }
1946         if (i == HSO_MAX_NET_DEVICES)
1947                 return -1;
1948         return 0;
1949 }
1950
1951 /* Frees our network device */
1952 static void hso_free_net_device(struct hso_device *hso_dev)
1953 {
1954         int i;
1955         struct hso_net *hso_net = dev2net(hso_dev);
1956
1957         if (!hso_net)
1958                 return;
1959
1960         /* start freeing */
1961         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
1962                 usb_free_urb(hso_net->mux_bulk_rx_urb_pool[i]);
1963                 kfree(hso_net->mux_bulk_rx_buf_pool[i]);
1964         }
1965         usb_free_urb(hso_net->mux_bulk_tx_urb);
1966         kfree(hso_net->mux_bulk_tx_buf);
1967
1968         remove_net_device(hso_net->parent);
1969
1970         if (hso_net->net) {
1971                 unregister_netdev(hso_net->net);
1972                 free_netdev(hso_net->net);
1973         }
1974
1975         hso_free_device(hso_dev);
1976 }
1977
1978 /* initialize the network interface */
1979 static void hso_net_init(struct net_device *net)
1980 {
1981         struct hso_net *hso_net = netdev_priv(net);
1982
1983         D1("sizeof hso_net is %d", (int)sizeof(*hso_net));
1984
1985         /* fill in the other fields */
1986         net->open = hso_net_open;
1987         net->stop = hso_net_close;
1988         net->hard_start_xmit = hso_net_start_xmit;
1989         net->tx_timeout = hso_net_tx_timeout;
1990         net->watchdog_timeo = HSO_NET_TX_TIMEOUT;
1991         net->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
1992         net->type = ARPHRD_NONE;
1993         net->mtu = DEFAULT_MTU - 14;
1994         net->tx_queue_len = 10;
1995         SET_ETHTOOL_OPS(net, &ops);
1996
1997         /* and initialize the semaphore */
1998         spin_lock_init(&hso_net->net_lock);
1999 }
2000
2001 /* Adds a network device in the network device table */
2002 static int add_net_device(struct hso_device *hso_dev)
2003 {
2004         int i;
2005
2006         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2007                 if (network_table[i] == NULL) {
2008                         network_table[i] = hso_dev;
2009                         break;
2010                 }
2011         }
2012         if (i == HSO_MAX_NET_DEVICES)
2013                 return -1;
2014         return 0;
2015 }
2016
2017 static int hso_radio_toggle(void *data, enum rfkill_state state)
2018 {
2019         struct hso_device *hso_dev = data;
2020         int enabled = (state == RFKILL_STATE_ON);
2021         int rv;
2022
2023         mutex_lock(&hso_dev->mutex);
2024         if (hso_dev->usb_gone)
2025                 rv = 0;
2026         else
2027                 rv = usb_control_msg(hso_dev->usb, usb_rcvctrlpipe(hso_dev->usb, 0),
2028                                        enabled ? 0x82 : 0x81, 0x40, 0, 0, NULL, 0,
2029                                        USB_CTRL_SET_TIMEOUT);
2030         mutex_unlock(&hso_dev->mutex);
2031         return rv;
2032 }
2033
2034 /* Creates and sets up everything for rfkill */
2035 static void hso_create_rfkill(struct hso_device *hso_dev,
2036                              struct usb_interface *interface)
2037 {
2038         struct hso_net *hso_net = dev2net(hso_dev);
2039         struct device *dev = hso_dev->dev;
2040         char *rfkn;
2041
2042         hso_net->rfkill = rfkill_allocate(&interface_to_usbdev(interface)->dev,
2043                                  RFKILL_TYPE_WLAN);
2044         if (!hso_net->rfkill) {
2045                 dev_err(dev, "%s - Out of memory", __func__);
2046                 return;
2047         }
2048         rfkn = kzalloc(20, GFP_KERNEL);
2049         if (!rfkn) {
2050                 rfkill_free(hso_net->rfkill);
2051                 dev_err(dev, "%s - Out of memory", __func__);
2052                 return;
2053         }
2054         snprintf(rfkn, 20, "hso-%d",
2055                  interface->altsetting->desc.bInterfaceNumber);
2056         hso_net->rfkill->name = rfkn;
2057         hso_net->rfkill->state = RFKILL_STATE_ON;
2058         hso_net->rfkill->data = hso_dev;
2059         hso_net->rfkill->toggle_radio = hso_radio_toggle;
2060         if (rfkill_register(hso_net->rfkill) < 0) {
2061                 kfree(rfkn);
2062                 hso_net->rfkill->name = NULL;
2063                 rfkill_free(hso_net->rfkill);
2064                 dev_err(dev, "%s - Failed to register rfkill", __func__);
2065                 return;
2066         }
2067 }
2068
2069 /* Creates our network device */
2070 static struct hso_device *hso_create_net_device(struct usb_interface *interface)
2071 {
2072         int result, i;
2073         struct net_device *net;
2074         struct hso_net *hso_net;
2075         struct hso_device *hso_dev;
2076
2077         hso_dev = hso_create_device(interface, HSO_INTF_MUX | HSO_PORT_NETWORK);
2078         if (!hso_dev)
2079                 return NULL;
2080
2081         /* allocate our network device, then we can put in our private data */
2082         /* call hso_net_init to do the basic initialization */
2083         net = alloc_netdev(sizeof(struct hso_net), "hso%d", hso_net_init);
2084         if (!net) {
2085                 dev_err(&interface->dev, "Unable to create ethernet device\n");
2086                 goto exit;
2087         }
2088
2089         hso_net = netdev_priv(net);
2090
2091         hso_dev->port_data.dev_net = hso_net;
2092         hso_net->net = net;
2093         hso_net->parent = hso_dev;
2094
2095         hso_net->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2096                                       USB_DIR_IN);
2097         if (!hso_net->in_endp) {
2098                 dev_err(&interface->dev, "Can't find BULK IN endpoint\n");
2099                 goto exit;
2100         }
2101         hso_net->out_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2102                                        USB_DIR_OUT);
2103         if (!hso_net->out_endp) {
2104                 dev_err(&interface->dev, "Can't find BULK OUT endpoint\n");
2105                 goto exit;
2106         }
2107         SET_NETDEV_DEV(net, &interface->dev);
2108
2109         /* registering our net device */
2110         result = register_netdev(net);
2111         if (result) {
2112                 dev_err(&interface->dev, "Failed to register device\n");
2113                 goto exit;
2114         }
2115
2116         /* start allocating */
2117         for (i = 0; i < MUX_BULK_RX_BUF_COUNT; i++) {
2118                 hso_net->mux_bulk_rx_urb_pool[i] = usb_alloc_urb(0, GFP_KERNEL);
2119                 if (!hso_net->mux_bulk_rx_urb_pool[i]) {
2120                         dev_err(&interface->dev, "Could not allocate rx urb\n");
2121                         goto exit;
2122                 }
2123                 hso_net->mux_bulk_rx_buf_pool[i] = kzalloc(MUX_BULK_RX_BUF_SIZE,
2124                                                            GFP_KERNEL);
2125                 if (!hso_net->mux_bulk_rx_buf_pool[i]) {
2126                         dev_err(&interface->dev, "Could not allocate rx buf\n");
2127                         goto exit;
2128                 }
2129         }
2130         hso_net->mux_bulk_tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2131         if (!hso_net->mux_bulk_tx_urb) {
2132                 dev_err(&interface->dev, "Could not allocate tx urb\n");
2133                 goto exit;
2134         }
2135         hso_net->mux_bulk_tx_buf = kzalloc(MUX_BULK_TX_BUF_SIZE, GFP_KERNEL);
2136         if (!hso_net->mux_bulk_tx_buf) {
2137                 dev_err(&interface->dev, "Could not allocate tx buf\n");
2138                 goto exit;
2139         }
2140
2141         add_net_device(hso_dev);
2142
2143         hso_log_port(hso_dev);
2144
2145         hso_create_rfkill(hso_dev, interface);
2146
2147         return hso_dev;
2148 exit:
2149         hso_free_net_device(hso_dev);
2150         return NULL;
2151 }
2152
2153 /* Frees an AT channel ( goes for both mux and non-mux ) */
2154 static void hso_free_serial_device(struct hso_device *hso_dev)
2155 {
2156         struct hso_serial *serial = dev2ser(hso_dev);
2157
2158         if (!serial)
2159                 return;
2160         set_serial_by_index(serial->minor, NULL);
2161
2162         hso_serial_common_free(serial);
2163
2164         if (serial->shared_int) {
2165                 mutex_lock(&serial->shared_int->shared_int_lock);
2166                 if (--serial->shared_int->ref_count == 0)
2167                         hso_free_shared_int(serial->shared_int);
2168                 else
2169                         mutex_unlock(&serial->shared_int->shared_int_lock);
2170         }
2171         kfree(serial);
2172         hso_free_device(hso_dev);
2173 }
2174
2175 /* Creates a bulk AT channel */
2176 static struct hso_device *hso_create_bulk_serial_device(
2177                         struct usb_interface *interface, int port)
2178 {
2179         struct hso_device *hso_dev;
2180         struct hso_serial *serial;
2181         int num_urbs;
2182
2183         hso_dev = hso_create_device(interface, port);
2184         if (!hso_dev)
2185                 return NULL;
2186
2187         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2188         if (!serial)
2189                 goto exit;
2190
2191         serial->parent = hso_dev;
2192         hso_dev->port_data.dev_serial = serial;
2193
2194         if (port & HSO_PORT_MODEM)
2195                 num_urbs = 2;
2196         else
2197                 num_urbs = 1;
2198
2199         if (hso_serial_common_create(serial, num_urbs, BULK_URB_RX_SIZE,
2200                                      BULK_URB_TX_SIZE))
2201                 goto exit;
2202
2203         serial->in_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_BULK,
2204                                      USB_DIR_IN);
2205         if (!serial->in_endp) {
2206                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2207                 goto exit;
2208         }
2209
2210         if (!
2211             (serial->out_endp =
2212              hso_get_ep(interface, USB_ENDPOINT_XFER_BULK, USB_DIR_OUT))) {
2213                 dev_err(&interface->dev, "Failed to find BULK IN ep\n");
2214                 goto exit;
2215         }
2216
2217         serial->write_data = hso_std_serial_write_data;
2218
2219         /* and record this serial */
2220         set_serial_by_index(serial->minor, serial);
2221
2222         /* setup the proc dirs and files if needed */
2223         hso_log_port(hso_dev);
2224
2225         /* done, return it */
2226         return hso_dev;
2227 exit:
2228         if (hso_dev && serial)
2229                 hso_serial_common_free(serial);
2230         kfree(serial);
2231         hso_free_device(hso_dev);
2232         return NULL;
2233 }
2234
2235 /* Creates a multiplexed AT channel */
2236 static
2237 struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface,
2238                                                 int port,
2239                                                 struct hso_shared_int *mux)
2240 {
2241         struct hso_device *hso_dev;
2242         struct hso_serial *serial;
2243         int port_spec;
2244
2245         port_spec = HSO_INTF_MUX;
2246         port_spec &= ~HSO_PORT_MASK;
2247
2248         port_spec |= hso_mux_to_port(port);
2249         if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NO_PORT)
2250                 return NULL;
2251
2252         hso_dev = hso_create_device(interface, port_spec);
2253         if (!hso_dev)
2254                 return NULL;
2255
2256         serial = kzalloc(sizeof(*serial), GFP_KERNEL);
2257         if (!serial)
2258                 goto exit;
2259
2260         hso_dev->port_data.dev_serial = serial;
2261         serial->parent = hso_dev;
2262
2263         if (hso_serial_common_create
2264             (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE))
2265                 goto exit;
2266
2267         serial->tx_data_length--;
2268         serial->write_data = hso_mux_serial_write_data;
2269
2270         serial->shared_int = mux;
2271         mutex_lock(&serial->shared_int->shared_int_lock);
2272         serial->shared_int->ref_count++;
2273         mutex_unlock(&serial->shared_int->shared_int_lock);
2274
2275         /* and record this serial */
2276         set_serial_by_index(serial->minor, serial);
2277
2278         /* setup the proc dirs and files if needed */
2279         hso_log_port(hso_dev);
2280
2281         /* done, return it */
2282         return hso_dev;
2283
2284 exit:
2285         if (serial) {
2286                 tty_unregister_device(tty_drv, serial->minor);
2287                 kfree(serial);
2288         }
2289         if (hso_dev)
2290                 hso_free_device(hso_dev);
2291         return NULL;
2292
2293 }
2294
2295 static void hso_free_shared_int(struct hso_shared_int *mux)
2296 {
2297         usb_free_urb(mux->shared_intr_urb);
2298         kfree(mux->shared_intr_buf);
2299         mutex_unlock(&mux->shared_int_lock);
2300         kfree(mux);
2301 }
2302
2303 static
2304 struct hso_shared_int *hso_create_shared_int(struct usb_interface *interface)
2305 {
2306         struct hso_shared_int *mux = kzalloc(sizeof(*mux), GFP_KERNEL);
2307
2308         if (!mux)
2309                 return NULL;
2310
2311         mux->intr_endp = hso_get_ep(interface, USB_ENDPOINT_XFER_INT,
2312                                     USB_DIR_IN);
2313         if (!mux->intr_endp) {
2314                 dev_err(&interface->dev, "Can't find INT IN endpoint\n");
2315                 goto exit;
2316         }
2317
2318         mux->shared_intr_urb = usb_alloc_urb(0, GFP_KERNEL);
2319         if (!mux->shared_intr_urb) {
2320                 dev_err(&interface->dev, "Could not allocate intr urb?");
2321                 goto exit;
2322         }
2323         mux->shared_intr_buf = kzalloc(mux->intr_endp->wMaxPacketSize,
2324                                        GFP_KERNEL);
2325         if (!mux->shared_intr_buf) {
2326                 dev_err(&interface->dev, "Could not allocate intr buf?");
2327                 goto exit;
2328         }
2329
2330         mutex_init(&mux->shared_int_lock);
2331
2332         return mux;
2333
2334 exit:
2335         kfree(mux->shared_intr_buf);
2336         usb_free_urb(mux->shared_intr_urb);
2337         kfree(mux);
2338         return NULL;
2339 }
2340
2341 /* Gets the port spec for a certain interface */
2342 static int hso_get_config_data(struct usb_interface *interface)
2343 {
2344         struct usb_device *usbdev = interface_to_usbdev(interface);
2345         u8 config_data[17];
2346         u32 if_num = interface->altsetting->desc.bInterfaceNumber;
2347         s32 result;
2348
2349         if (usb_control_msg(usbdev, usb_rcvctrlpipe(usbdev, 0),
2350                             0x86, 0xC0, 0, 0, config_data, 17,
2351                             USB_CTRL_SET_TIMEOUT) != 0x11) {
2352                 return -EIO;
2353         }
2354
2355         switch (config_data[if_num]) {
2356         case 0x0:
2357                 result = 0;
2358                 break;
2359         case 0x1:
2360                 result = HSO_PORT_DIAG;
2361                 break;
2362         case 0x2:
2363                 result = HSO_PORT_GPS;
2364                 break;
2365         case 0x3:
2366                 result = HSO_PORT_GPS_CONTROL;
2367                 break;
2368         case 0x4:
2369                 result = HSO_PORT_APP;
2370                 break;
2371         case 0x5:
2372                 result = HSO_PORT_APP2;
2373                 break;
2374         case 0x6:
2375                 result = HSO_PORT_CONTROL;
2376                 break;
2377         case 0x7:
2378                 result = HSO_PORT_NETWORK;
2379                 break;
2380         case 0x8:
2381                 result = HSO_PORT_MODEM;
2382                 break;
2383         case 0x9:
2384                 result = HSO_PORT_MSD;
2385                 break;
2386         case 0xa:
2387                 result = HSO_PORT_PCSC;
2388                 break;
2389         case 0xb:
2390                 result = HSO_PORT_VOICE;
2391                 break;
2392         default:
2393                 result = 0;
2394         }
2395
2396         if (result)
2397                 result |= HSO_INTF_BULK;
2398
2399         if (config_data[16] & 0x1)
2400                 result |= HSO_INFO_CRC_BUG;
2401
2402         return result;
2403 }
2404
2405 /* called once for each interface upon device insertion */
2406 static int hso_probe(struct usb_interface *interface,
2407                      const struct usb_device_id *id)
2408 {
2409         int mux, i, if_num, port_spec;
2410         unsigned char port_mask;
2411         struct hso_device *hso_dev = NULL;
2412         struct hso_shared_int *shared_int;
2413         struct hso_device *tmp_dev = NULL;
2414
2415         if_num = interface->altsetting->desc.bInterfaceNumber;
2416
2417         /* Get the interface/port specification from either driver_info or from
2418          * the device itself */
2419         if (id->driver_info)
2420                 port_spec = ((u32 *)(id->driver_info))[if_num];
2421         else
2422                 port_spec = hso_get_config_data(interface);
2423
2424         if (interface->cur_altsetting->desc.bInterfaceClass != 0xFF) {
2425                 dev_err(&interface->dev, "Not our interface\n");
2426                 return -ENODEV;
2427         }
2428         /* Check if we need to switch to alt interfaces prior to port
2429          * configuration */
2430         if (interface->num_altsetting > 1)
2431                 usb_set_interface(interface_to_usbdev(interface), if_num, 1);
2432         interface->needs_remote_wakeup = 1;
2433
2434         /* Allocate new hso device(s) */
2435         switch (port_spec & HSO_INTF_MASK) {
2436         case HSO_INTF_MUX:
2437                 if ((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK) {
2438                         /* Create the network device */
2439                         if (!disable_net) {
2440                                 hso_dev = hso_create_net_device(interface);
2441                                 if (!hso_dev)
2442                                         goto exit;
2443                                 tmp_dev = hso_dev;
2444                         }
2445                 }
2446
2447                 if (hso_get_mux_ports(interface, &port_mask))
2448                         /* TODO: de-allocate everything */
2449                         goto exit;
2450
2451                 shared_int = hso_create_shared_int(interface);
2452                 if (!shared_int)
2453                         goto exit;
2454
2455                 for (i = 1, mux = 0; i < 0x100; i = i << 1, mux++) {
2456                         if (port_mask & i) {
2457                                 hso_dev = hso_create_mux_serial_device(
2458                                                 interface, i, shared_int);
2459                                 if (!hso_dev)
2460                                         goto exit;
2461                         }
2462                 }
2463
2464                 if (tmp_dev)
2465                         hso_dev = tmp_dev;
2466                 break;
2467
2468         case HSO_INTF_BULK:
2469                 /* It's a regular bulk interface */
2470                 if (((port_spec & HSO_PORT_MASK) == HSO_PORT_NETWORK)
2471                     && !disable_net)
2472                         hso_dev = hso_create_net_device(interface);
2473                 else
2474                         hso_dev =
2475                             hso_create_bulk_serial_device(interface, port_spec);
2476                 if (!hso_dev)
2477                         goto exit;
2478                 break;
2479         default:
2480                 goto exit;
2481         }
2482
2483         usb_driver_claim_interface(&hso_driver, interface, hso_dev);
2484
2485         /* save our data pointer in this device */
2486         usb_set_intfdata(interface, hso_dev);
2487
2488         /* done */
2489         return 0;
2490 exit:
2491         hso_free_interface(interface);
2492         return -ENODEV;
2493 }
2494
2495 /* device removed, cleaning up */
2496 static void hso_disconnect(struct usb_interface *interface)
2497 {
2498         hso_free_interface(interface);
2499
2500         /* remove reference of our private data */
2501         usb_set_intfdata(interface, NULL);
2502
2503         usb_driver_release_interface(&hso_driver, interface);
2504 }
2505
2506 static void async_get_intf(struct work_struct *data)
2507 {
2508         struct hso_device *hso_dev =
2509             container_of(data, struct hso_device, async_get_intf);
2510         usb_autopm_get_interface(hso_dev->interface);
2511 }
2512
2513 static void async_put_intf(struct work_struct *data)
2514 {
2515         struct hso_device *hso_dev =
2516             container_of(data, struct hso_device, async_put_intf);
2517         usb_autopm_put_interface(hso_dev->interface);
2518 }
2519
2520 static int hso_get_activity(struct hso_device *hso_dev)
2521 {
2522         if (hso_dev->usb->state == USB_STATE_SUSPENDED) {
2523                 if (!hso_dev->is_active) {
2524                         hso_dev->is_active = 1;
2525                         schedule_work(&hso_dev->async_get_intf);
2526                 }
2527         }
2528
2529         if (hso_dev->usb->state != USB_STATE_CONFIGURED)
2530                 return -EAGAIN;
2531
2532         usb_mark_last_busy(hso_dev->usb);
2533
2534         return 0;
2535 }
2536
2537 static int hso_put_activity(struct hso_device *hso_dev)
2538 {
2539         if (hso_dev->usb->state != USB_STATE_SUSPENDED) {
2540                 if (hso_dev->is_active) {
2541                         hso_dev->is_active = 0;
2542                         schedule_work(&hso_dev->async_put_intf);
2543                         return -EAGAIN;
2544                 }
2545         }
2546         hso_dev->is_active = 0;
2547         return 0;
2548 }
2549
2550 /* called by kernel when we need to suspend device */
2551 static int hso_suspend(struct usb_interface *iface, pm_message_t message)
2552 {
2553         int i, result;
2554
2555         /* Stop all serial ports */
2556         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2557                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2558                         result = hso_stop_serial_device(serial_table[i]);
2559                         if (result)
2560                                 goto out;
2561                 }
2562         }
2563
2564         /* Stop all network ports */
2565         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2566                 if (network_table[i] &&
2567                     (network_table[i]->interface == iface)) {
2568                         result = hso_stop_net_device(network_table[i]);
2569                         if (result)
2570                                 goto out;
2571                 }
2572         }
2573
2574 out:
2575         return 0;
2576 }
2577
2578 /* called by kernel when we need to resume device */
2579 static int hso_resume(struct usb_interface *iface)
2580 {
2581         int i, result = 0;
2582         struct hso_net *hso_net;
2583
2584         /* Start all serial ports */
2585         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2586                 if (serial_table[i] && (serial_table[i]->interface == iface)) {
2587                         if (dev2ser(serial_table[i])->open_count) {
2588                                 result =
2589                                     hso_start_serial_device(serial_table[i], GFP_NOIO);
2590                                 hso_kick_transmit(dev2ser(serial_table[i]));
2591                                 if (result)
2592                                         goto out;
2593                         }
2594                 }
2595         }
2596
2597         /* Start all network ports */
2598         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2599                 if (network_table[i] &&
2600                     (network_table[i]->interface == iface)) {
2601                         hso_net = dev2net(network_table[i]);
2602                         /* First transmit any lingering data, then restart the
2603                          * device. */
2604                         if (hso_net->skb_tx_buf) {
2605                                 dev_dbg(&iface->dev,
2606                                         "Transmitting lingering data\n");
2607                                 hso_net_start_xmit(hso_net->skb_tx_buf,
2608                                                    hso_net->net);
2609                         }
2610                         result = hso_start_net_device(network_table[i]);
2611                         if (result)
2612                                 goto out;
2613                 }
2614         }
2615
2616 out:
2617         return result;
2618 }
2619
2620 static void hso_serial_ref_free(struct kref *ref)
2621 {
2622         struct hso_device *hso_dev = container_of(ref, struct hso_device, ref);
2623
2624         hso_free_serial_device(hso_dev);
2625 }
2626
2627 static void hso_free_interface(struct usb_interface *interface)
2628 {
2629         struct hso_serial *hso_dev;
2630         int i;
2631
2632         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++) {
2633                 if (serial_table[i]
2634                     && (serial_table[i]->interface == interface)) {
2635                         hso_dev = dev2ser(serial_table[i]);
2636                         if (hso_dev->tty)
2637                                 tty_hangup(hso_dev->tty);
2638                         mutex_lock(&hso_dev->parent->mutex);
2639                         hso_dev->parent->usb_gone = 1;
2640                         mutex_unlock(&hso_dev->parent->mutex);
2641                         kref_put(&serial_table[i]->ref, hso_serial_ref_free);
2642                 }
2643         }
2644
2645         for (i = 0; i < HSO_MAX_NET_DEVICES; i++) {
2646                 if (network_table[i]
2647                     && (network_table[i]->interface == interface)) {
2648                         struct rfkill *rfk = dev2net(network_table[i])->rfkill;
2649                         /* hso_stop_net_device doesn't stop the net queue since
2650                          * traffic needs to start it again when suspended */
2651                         netif_stop_queue(dev2net(network_table[i])->net);
2652                         hso_stop_net_device(network_table[i]);
2653                         cancel_work_sync(&network_table[i]->async_put_intf);
2654                         cancel_work_sync(&network_table[i]->async_get_intf);
2655                         if(rfk)
2656                                 rfkill_unregister(rfk);
2657                         hso_free_net_device(network_table[i]);
2658                 }
2659         }
2660 }
2661
2662 /* Helper functions */
2663
2664 /* Get the endpoint ! */
2665 static struct usb_endpoint_descriptor *hso_get_ep(struct usb_interface *intf,
2666                                                   int type, int dir)
2667 {
2668         int i;
2669         struct usb_host_interface *iface = intf->cur_altsetting;
2670         struct usb_endpoint_descriptor *endp;
2671
2672         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2673                 endp = &iface->endpoint[i].desc;
2674                 if (((endp->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == dir) &&
2675                     ((endp->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == type))
2676                         return endp;
2677         }
2678
2679         return NULL;
2680 }
2681
2682 /* Get the byte that describes which ports are enabled */
2683 static int hso_get_mux_ports(struct usb_interface *intf, unsigned char *ports)
2684 {
2685         int i;
2686         struct usb_host_interface *iface = intf->cur_altsetting;
2687
2688         if (iface->extralen == 3) {
2689                 *ports = iface->extra[2];
2690                 return 0;
2691         }
2692
2693         for (i = 0; i < iface->desc.bNumEndpoints; i++) {
2694                 if (iface->endpoint[i].extralen == 3) {
2695                         *ports = iface->endpoint[i].extra[2];
2696                         return 0;
2697                 }
2698         }
2699
2700         return -1;
2701 }
2702
2703 /* interrupt urb needs to be submitted, used for serial read of muxed port */
2704 static int hso_mux_submit_intr_urb(struct hso_shared_int *shared_int,
2705                                    struct usb_device *usb, gfp_t gfp)
2706 {
2707         int result;
2708
2709         usb_fill_int_urb(shared_int->shared_intr_urb, usb,
2710                          usb_rcvintpipe(usb,
2711                                 shared_int->intr_endp->bEndpointAddress & 0x7F),
2712                          shared_int->shared_intr_buf,
2713                          shared_int->intr_endp->wMaxPacketSize,
2714                          intr_callback, shared_int,
2715                          shared_int->intr_endp->bInterval);
2716
2717         result = usb_submit_urb(shared_int->shared_intr_urb, gfp);
2718         if (result)
2719                 dev_warn(&usb->dev, "%s failed mux_intr_urb %d", __func__,
2720                         result);
2721
2722         return result;
2723 }
2724
2725 /* operations setup of the serial interface */
2726 static struct tty_operations hso_serial_ops = {
2727         .open = hso_serial_open,
2728         .close = hso_serial_close,
2729         .write = hso_serial_write,
2730         .write_room = hso_serial_write_room,
2731         .set_termios = hso_serial_set_termios,
2732         .chars_in_buffer = hso_serial_chars_in_buffer,
2733         .tiocmget = hso_serial_tiocmget,
2734         .tiocmset = hso_serial_tiocmset,
2735 };
2736
2737 static struct usb_driver hso_driver = {
2738         .name = driver_name,
2739         .probe = hso_probe,
2740         .disconnect = hso_disconnect,
2741         .id_table = hso_ids,
2742         .suspend = hso_suspend,
2743         .resume = hso_resume,
2744         .supports_autosuspend = 1,
2745 };
2746
2747 static int __init hso_init(void)
2748 {
2749         int i;
2750         int result;
2751
2752         /* put it in the log */
2753         printk(KERN_INFO "hso: %s\n", version);
2754
2755         /* Initialise the serial table semaphore and table */
2756         spin_lock_init(&serial_table_lock);
2757         for (i = 0; i < HSO_SERIAL_TTY_MINORS; i++)
2758                 serial_table[i] = NULL;
2759
2760         /* allocate our driver using the proper amount of supported minors */
2761         tty_drv = alloc_tty_driver(HSO_SERIAL_TTY_MINORS);
2762         if (!tty_drv)
2763                 return -ENOMEM;
2764
2765         /* fill in all needed values */
2766         tty_drv->magic = TTY_DRIVER_MAGIC;
2767         tty_drv->owner = THIS_MODULE;
2768         tty_drv->driver_name = driver_name;
2769         tty_drv->name = tty_filename;
2770
2771         /* if major number is provided as parameter, use that one */
2772         if (tty_major)
2773                 tty_drv->major = tty_major;
2774
2775         tty_drv->minor_start = 0;
2776         tty_drv->num = HSO_SERIAL_TTY_MINORS;
2777         tty_drv->type = TTY_DRIVER_TYPE_SERIAL;
2778         tty_drv->subtype = SERIAL_TYPE_NORMAL;
2779         tty_drv->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
2780         tty_drv->init_termios = tty_std_termios;
2781         tty_drv->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2782         tty_drv->termios = hso_serial_termios;
2783         tty_drv->termios_locked = hso_serial_termios_locked;
2784         tty_set_operations(tty_drv, &hso_serial_ops);
2785
2786         /* register the tty driver */
2787         result = tty_register_driver(tty_drv);
2788         if (result) {
2789                 printk(KERN_ERR "%s - tty_register_driver failed(%d)\n",
2790                         __func__, result);
2791                 return result;
2792         }
2793
2794         /* register this module as an usb driver */
2795         result = usb_register(&hso_driver);
2796         if (result) {
2797                 printk(KERN_ERR "Could not register hso driver? error: %d\n",
2798                         result);
2799                 /* cleanup serial interface */
2800                 tty_unregister_driver(tty_drv);
2801                 return result;
2802         }
2803
2804         /* done */
2805         return 0;
2806 }
2807
2808 static void __exit hso_exit(void)
2809 {
2810         printk(KERN_INFO "hso: unloaded\n");
2811
2812         tty_unregister_driver(tty_drv);
2813         /* deregister the usb driver */
2814         usb_deregister(&hso_driver);
2815 }
2816
2817 /* Module definitions */
2818 module_init(hso_init);
2819 module_exit(hso_exit);
2820
2821 MODULE_AUTHOR(MOD_AUTHOR);
2822 MODULE_DESCRIPTION(MOD_DESCRIPTION);
2823 MODULE_LICENSE(MOD_LICENSE);
2824 MODULE_INFO(Version, DRIVER_VERSION);
2825
2826 /* change the debug level (eg: insmod hso.ko debug=0x04) */
2827 MODULE_PARM_DESC(debug, "Level of debug [0x01 | 0x02 | 0x04 | 0x08 | 0x10]");
2828 module_param(debug, int, S_IRUGO | S_IWUSR);
2829
2830 /* set the major tty number (eg: insmod hso.ko tty_major=245) */
2831 MODULE_PARM_DESC(tty_major, "Set the major tty number");
2832 module_param(tty_major, int, S_IRUGO | S_IWUSR);
2833
2834 /* disable network interface (eg: insmod hso.ko disable_net=1) */
2835 MODULE_PARM_DESC(disable_net, "Disable the network interface");
2836 module_param(disable_net, int, S_IRUGO | S_IWUSR);