drivers/usb/serial/visor.c

   1 /*
   2  * USB HandSpring Visor, Palm m50x, and Sony Clie driver
   3  * (supports all of the Palm OS USB devices)
   4  *
   5  *      Copyright (C) 1999 - 2004
   6  *          Greg Kroah-Hartman (greg@kroah.com)
   7  *
   8  *      This program is free software; you can redistribute it and/or
   9  *      modify it under the terms of the GNU General Public License version
  10  *      2 as published by the Free Software Foundation.
  11  *
  12  * See Documentation/usb/usb-serial.txt for more information on using this
  13  * driver
  14  *
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/errno.h>
  19 #include <linux/init.h>
  20 #include <linux/slab.h>
  21 #include <linux/tty.h>
  22 #include <linux/tty_driver.h>
  23 #include <linux/tty_flip.h>
  24 #include <linux/module.h>
  25 #include <linux/moduleparam.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/uaccess.h>
  28 #include <linux/usb.h>
  29 #include <linux/usb/serial.h>
  30 #include "visor.h"
  31
  32 /*
  33  * Version Information
  34  */
  35 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>"
  36 #define DRIVER_DESC "USB HandSpring Visor / Palm OS driver"
  37
  38 /* function prototypes for a handspring visor */
  39 static int  visor_open(struct tty_struct *tty, struct usb_serial_port *port,
  40                                         struct file *filp);
  41 static void visor_close(struct tty_struct *tty, struct usb_serial_port *port,
  42                                         struct file *filp);
  43 static int  visor_write(struct tty_struct *tty, struct usb_serial_port *port,
  44                                         const unsigned char *buf, int count);
  45 static int  visor_write_room(struct tty_struct *tty);
  46 static void visor_throttle(struct tty_struct *tty);
  47 static void visor_unthrottle(struct tty_struct *tty);
  48 static int  visor_probe(struct usb_serial *serial,
  49                                         const struct usb_device_id *id);
  50 static int  visor_calc_num_ports(struct usb_serial *serial);
  51 static void visor_shutdown(struct usb_serial *serial);
  52 static void visor_write_bulk_callback(struct urb *urb);
  53 static void visor_read_bulk_callback(struct urb *urb);
  54 static void visor_read_int_callback(struct urb *urb);
  55 static int  clie_3_5_startup(struct usb_serial *serial);
  56 static int  treo_attach(struct usb_serial *serial);
  57 static int clie_5_attach(struct usb_serial *serial);
  58 static int palm_os_3_probe(struct usb_serial *serial,
  59                                         const struct usb_device_id *id);
  60 static int palm_os_4_probe(struct usb_serial *serial,
  61                                         const struct usb_device_id *id);
  62
  63 /* Parameters that may be passed into the module. */
  64 static int debug;
  65 static __u16 vendor;
  66 static __u16 product;
  67
  68 static struct usb_device_id id_table [] = {
  69         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID),
  70                 .driver_info = (kernel_ulong_t)&palm_os_3_probe },
  71         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID),
  72                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  73         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID),
  74                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  75         { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID),
  76                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  77         { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID),
  78                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  79         { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID),
  80                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  81         { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID),
  82                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  83         { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID),
  84                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  85         { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID),
  86                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  87         { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID),
  88                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  89         { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID),
  90                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  91         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID),
  92                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  93         { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650),
  94                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  95         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID),
  96                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  97         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID),
  98                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
  99         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID),
 100                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 101         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID),
 102                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 103         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID),
 104                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 105         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID),
 106                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 107         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID),
 108                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 109         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID),
 110                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 111         { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID),
 112                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 113         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID),
 114                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 115         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID),
 116                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 117         { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID),
 118                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 119         { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID),
 120                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 121         { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID),
 122                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 123         { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID),
 124                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 125         { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID),
 126                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 127         { },                                    /* optional parameter entry */
 128         { }                                     /* Terminating entry */
 129 };
 130
 131 static struct usb_device_id clie_id_5_table [] = {
 132         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID),
 133                 .driver_info = (kernel_ulong_t)&palm_os_4_probe },
 134         { },                                    /* optional parameter entry */
 135         { }                                     /* Terminating entry */
 136 };
 137
 138 static struct usb_device_id clie_id_3_5_table [] = {
 139         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
 140         { }                                     /* Terminating entry */
 141 };
 142
 143 static struct usb_device_id id_table_combined [] = {
 144         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) },
 145         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) },
 146         { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) },
 147         { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) },
 148         { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) },
 149         { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) },
 150         { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) },
 151         { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) },
 152         { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) },
 153         { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) },
 154         { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) },
 155         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) },
 156         { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) },
 157         { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) },
 158         { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) },
 159         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) },
 160         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) },
 161         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) },
 162         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) },
 163         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) },
 164         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) },
 165         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) },
 166         { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) },
 167         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) },
 168         { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) },
 169         { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) },
 170         { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) },
 171         { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) },
 172         { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) },
 173         { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) },
 174         { },                                    /* optional parameter entry */
 175         { }                                     /* Terminating entry */
 176 };
 177
 178 MODULE_DEVICE_TABLE(usb, id_table_combined);
 179
 180 static struct usb_driver visor_driver = {
 181         .name =         "visor",
 182         .probe =        usb_serial_probe,
 183         .disconnect =   usb_serial_disconnect,
 184         .id_table =     id_table_combined,
 185         .no_dynamic_id =        1,
 186 };
 187
 188 /* All of the device info needed for the Handspring Visor,
 189    and Palm 4.0 devices */
 190 static struct usb_serial_driver handspring_device = {
 191         .driver = {
 192                 .owner =        THIS_MODULE,
 193                 .name =         "visor",
 194         },
 195         .description =          "Handspring Visor / Palm OS",
 196         .usb_driver =           &visor_driver,
 197         .id_table =             id_table,
 198         .num_ports =            2,
 199         .open =                 visor_open,
 200         .close =                visor_close,
 201         .throttle =             visor_throttle,
 202         .unthrottle =           visor_unthrottle,
 203         .attach =               treo_attach,
 204         .probe =                visor_probe,
 205         .calc_num_ports =       visor_calc_num_ports,
 206         .shutdown =             visor_shutdown,
 207         .write =                visor_write,
 208         .write_room =           visor_write_room,
 209         .write_bulk_callback =  visor_write_bulk_callback,
 210         .read_bulk_callback =   visor_read_bulk_callback,
 211         .read_int_callback =    visor_read_int_callback,
 212 };
 213
 214 /* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */
 215 static struct usb_serial_driver clie_5_device = {
 216         .driver = {
 217                 .owner =        THIS_MODULE,
 218                 .name =         "clie_5",
 219         },
 220         .description =          "Sony Clie 5.0",
 221         .usb_driver =           &visor_driver,
 222         .id_table =             clie_id_5_table,
 223         .num_ports =            2,
 224         .open =                 visor_open,
 225         .close =                visor_close,
 226         .throttle =             visor_throttle,
 227         .unthrottle =           visor_unthrottle,
 228         .attach =               clie_5_attach,
 229         .probe =                visor_probe,
 230         .calc_num_ports =       visor_calc_num_ports,
 231         .shutdown =             visor_shutdown,
 232         .write =                visor_write,
 233         .write_room =           visor_write_room,
 234         .write_bulk_callback =  visor_write_bulk_callback,
 235         .read_bulk_callback =   visor_read_bulk_callback,
 236         .read_int_callback =    visor_read_int_callback,
 237 };
 238
 239 /* device info for the Sony Clie OS version 3.5 */
 240 static struct usb_serial_driver clie_3_5_device = {
 241         .driver = {
 242                 .owner =        THIS_MODULE,
 243                 .name =         "clie_3.5",
 244         },
 245         .description =          "Sony Clie 3.5",
 246         .usb_driver =           &visor_driver,
 247         .id_table =             clie_id_3_5_table,
 248         .num_ports =            1,
 249         .open =                 visor_open,
 250         .close =                visor_close,
 251         .throttle =             visor_throttle,
 252         .unthrottle =           visor_unthrottle,
 253         .attach =               clie_3_5_startup,
 254         .write =                visor_write,
 255         .write_room =           visor_write_room,
 256         .write_bulk_callback =  visor_write_bulk_callback,
 257         .read_bulk_callback =   visor_read_bulk_callback,
 258 };
 259
 260 struct visor_private {
 261         spinlock_t lock;
 262         int bytes_in;
 263         int bytes_out;
 264         int outstanding_urbs;
 265         unsigned char throttled;
 266         unsigned char actually_throttled;
 267 };
 268
 269 /* number of outstanding urbs to prevent userspace DoS from happening */
 270 #define URB_UPPER_LIMIT 42
 271
 272 static int stats;
 273
 274 /******************************************************************************
 275  * Handspring Visor specific driver functions
 276  ******************************************************************************/
 277 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port,
 278                                                         struct file *filp)
 279 {
 280         struct usb_serial *serial = port->serial;
 281         struct visor_private *priv = usb_get_serial_port_data(port);
 282         unsigned long flags;
 283         int result = 0;
 284
 285         dbg("%s - port %d", __func__, port->number);
 286
 287         if (!port->read_urb) {
 288                 /* this is needed for some brain dead Sony devices */
 289                 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n");
 290                 return -ENODEV;
 291         }
 292
 293         spin_lock_irqsave(&priv->lock, flags);
 294         priv->bytes_in = 0;
 295         priv->bytes_out = 0;
 296         priv->throttled = 0;
 297         spin_unlock_irqrestore(&priv->lock, flags);
 298
 299         /*
 300          * Force low_latency on so that our tty_push actually forces the data
 301          * through, otherwise it is scheduled, and with high data rates (like
 302          * with OHCI) data can get lost.
 303          */
 304         if (tty)
 305                 tty->low_latency = 1;
 306
 307         /* Start reading from the device */
 308         usb_fill_bulk_urb(port->read_urb, serial->dev,
 309                            usb_rcvbulkpipe(serial->dev,
 310                                             port->bulk_in_endpointAddress),
 311                            port->read_urb->transfer_buffer,
 312                            port->read_urb->transfer_buffer_length,
 313                            visor_read_bulk_callback, port);
 314         result = usb_submit_urb(port->read_urb, GFP_KERNEL);
 315         if (result) {
 316                 dev_err(&port->dev,
 317                         "%s - failed submitting read urb, error %d\n",
 318                                                         __func__, result);
 319                 goto exit;
 320         }
 321
 322         if (port->interrupt_in_urb) {
 323                 dbg("%s - adding interrupt input for treo", __func__);
 324                 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 325                 if (result)
 326                         dev_err(&port->dev,
 327                             "%s - failed submitting interrupt urb, error %d\n",
 328                                                         __func__, result);
 329         }
 330 exit:
 331         return result;
 332 }
 333
 334
 335 static void visor_close(struct tty_struct *tty,
 336                         struct usb_serial_port *port, struct file *filp)
 337 {
 338         struct visor_private *priv = usb_get_serial_port_data(port);
 339         unsigned char *transfer_buffer;
 340
 341         dbg("%s - port %d", __func__, port->number);
 342
 343         /* shutdown our urbs */
 344         usb_kill_urb(port->read_urb);
 345         usb_kill_urb(port->interrupt_in_urb);
 346
 347         mutex_lock(&port->serial->disc_mutex);
 348         if (!port->serial->disconnected) {
 349                 /* Try to send shutdown message, unless the device is gone */
 350                 transfer_buffer =  kmalloc(0x12, GFP_KERNEL);
 351                 if (transfer_buffer) {
 352                         usb_control_msg(port->serial->dev,
 353                                          usb_rcvctrlpipe(port->serial->dev, 0),
 354                                          VISOR_CLOSE_NOTIFICATION, 0xc2,
 355                                          0x0000, 0x0000,
 356                                          transfer_buffer, 0x12, 300);
 357                         kfree(transfer_buffer);
 358                 }
 359         }
 360         mutex_unlock(&port->serial->disc_mutex);
 361
 362         if (stats)
 363                 dev_info(&port->dev, "Bytes In = %d  Bytes Out = %d\n",
 364                          priv->bytes_in, priv->bytes_out);
 365 }
 366
 367
 368 static int visor_write(struct tty_struct *tty, struct usb_serial_port *port,
 369                                         const unsigned char *buf, int count)
 370 {
 371         struct visor_private *priv = usb_get_serial_port_data(port);
 372         struct usb_serial *serial = port->serial;
 373         struct urb *urb;
 374         unsigned char *buffer;
 375         unsigned long flags;
 376         int status;
 377
 378         dbg("%s - port %d", __func__, port->number);
 379
 380         spin_lock_irqsave(&priv->lock, flags);
 381         if (priv->outstanding_urbs > URB_UPPER_LIMIT) {
 382                 spin_unlock_irqrestore(&priv->lock, flags);
 383                 dbg("%s - write limit hit\n", __func__);
 384                 return 0;
 385         }
 386         priv->outstanding_urbs++;
 387         spin_unlock_irqrestore(&priv->lock, flags);
 388
 389         buffer = kmalloc(count, GFP_ATOMIC);
 390         if (!buffer) {
 391                 dev_err(&port->dev, "out of memory\n");
 392                 count = -ENOMEM;
 393                 goto error_no_buffer;
 394         }
 395
 396         urb = usb_alloc_urb(0, GFP_ATOMIC);
 397         if (!urb) {
 398                 dev_err(&port->dev, "no more free urbs\n");
 399                 count = -ENOMEM;
 400                 goto error_no_urb;
 401         }
 402
 403         memcpy(buffer, buf, count);
 404
 405         usb_serial_debug_data(debug, &port->dev, __func__, count, buffer);
 406
 407         usb_fill_bulk_urb(urb, serial->dev,
 408                            usb_sndbulkpipe(serial->dev,
 409                                             port->bulk_out_endpointAddress),
 410                            buffer, count,
 411                            visor_write_bulk_callback, port);
 412
 413         /* send it down the pipe */
 414         status = usb_submit_urb(urb, GFP_ATOMIC);
 415         if (status) {
 416                 dev_err(&port->dev,
 417                    "%s - usb_submit_urb(write bulk) failed with status = %d\n",
 418                                                         __func__, status);
 419                 count = status;
 420                 goto error;
 421         } else {
 422                 spin_lock_irqsave(&priv->lock, flags);
 423                 priv->bytes_out += count;
 424                 spin_unlock_irqrestore(&priv->lock, flags);
 425         }
 426
 427         /* we are done with this urb, so let the host driver
 428          * really free it when it is finished with it */
 429         usb_free_urb(urb);
 430
 431         return count;
 432 error:
 433         usb_free_urb(urb);
 434 error_no_urb:
 435         kfree(buffer);
 436 error_no_buffer:
 437         spin_lock_irqsave(&priv->lock, flags);
 438         --priv->outstanding_urbs;
 439         spin_unlock_irqrestore(&priv->lock, flags);
 440         return count;
 441 }
 442
 443
 444 static int visor_write_room(struct tty_struct *tty)
 445 {
 446         struct usb_serial_port *port = tty->driver_data;
 447         struct visor_private *priv = usb_get_serial_port_data(port);
 448         unsigned long flags;
 449
 450         dbg("%s - port %d", __func__, port->number);
 451
 452         /*
 453          * We really can take anything the user throws at us
 454          * but let's pick a nice big number to tell the tty
 455          * layer that we have lots of free space, unless we don't.
 456          */
 457
 458         spin_lock_irqsave(&priv->lock, flags);
 459         if (priv->outstanding_urbs > URB_UPPER_LIMIT * 2 / 3) {
 460                 spin_unlock_irqrestore(&priv->lock, flags);
 461                 dbg("%s - write limit hit\n", __func__);
 462                 return 0;
 463         }
 464         spin_unlock_irqrestore(&priv->lock, flags);
 465
 466         return 2048;
 467 }
 468
 469
 470 static void visor_write_bulk_callback(struct urb *urb)
 471 {
 472         struct usb_serial_port *port = urb->context;
 473         struct visor_private *priv = usb_get_serial_port_data(port);
 474         int status = urb->status;
 475         unsigned long flags;
 476
 477         /* free up the transfer buffer, as usb_free_urb() does not do this */
 478         kfree(urb->transfer_buffer);
 479
 480         dbg("%s - port %d", __func__, port->number);
 481
 482         if (status)
 483                 dbg("%s - nonzero write bulk status received: %d",
 484                     __func__, status);
 485
 486         spin_lock_irqsave(&priv->lock, flags);
 487         --priv->outstanding_urbs;
 488         spin_unlock_irqrestore(&priv->lock, flags);
 489
 490         usb_serial_port_softint(port);
 491 }
 492
 493
 494 static void visor_read_bulk_callback(struct urb *urb)
 495 {
 496         struct usb_serial_port *port = urb->context;
 497         struct visor_private *priv = usb_get_serial_port_data(port);
 498         unsigned char *data = urb->transfer_buffer;
 499         int status = urb->status;
 500         struct tty_struct *tty;
 501         int result;
 502         int available_room = 0;
 503
 504         dbg("%s - port %d", __func__, port->number);
 505
 506         if (status) {
 507                 dbg("%s - nonzero read bulk status received: %d",
 508                     __func__, status);
 509                 return;
 510         }
 511
 512         usb_serial_debug_data(debug, &port->dev, __func__,
 513                                                 urb->actual_length, data);
 514
 515         if (urb->actual_length) {
 516                 tty = tty_port_tty_get(&port->port);
 517                 if (tty) {
 518                         available_room = tty_buffer_request_room(tty,
 519                                                         urb->actual_length);
 520                         if (available_room) {
 521                                 tty_insert_flip_string(tty, data,
 522                                                         available_room);
 523                                 tty_flip_buffer_push(tty);
 524                         }
 525                         tty_kref_put(tty);
 526                 }
 527                 spin_lock(&priv->lock);
 528                 priv->bytes_in += available_room;
 529
 530         } else {
 531                 spin_lock(&priv->lock);
 532         }
 533
 534         /* Continue trying to always read if we should */
 535         if (!priv->throttled) {
 536                 usb_fill_bulk_urb(port->read_urb, port->serial->dev,
 537                                    usb_rcvbulkpipe(port->serial->dev,
 538                                            port->bulk_in_endpointAddress),
 539                                    port->read_urb->transfer_buffer,
 540                                    port->read_urb->transfer_buffer_length,
 541                                    visor_read_bulk_callback, port);
 542                 result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 543                 if (result)
 544                         dev_err(&port->dev,
 545                             "%s - failed resubmitting read urb, error %d\n",
 546                                                         __func__, result);
 547         } else
 548                 priv->actually_throttled = 1;
 549         spin_unlock(&priv->lock);
 550 }
 551
 552 static void visor_read_int_callback(struct urb *urb)
 553 {
 554         struct usb_serial_port *port = urb->context;
 555         int status = urb->status;
 556         int result;
 557
 558         switch (status) {
 559         case 0:
 560                 /* success */
 561                 break;
 562         case -ECONNRESET:
 563         case -ENOENT:
 564         case -ESHUTDOWN:
 565                 /* this urb is terminated, clean up */
 566                 dbg("%s - urb shutting down with status: %d",
 567                     __func__, status);
 568                 return;
 569         default:
 570                 dbg("%s - nonzero urb status received: %d",
 571                     __func__, status);
 572                 goto exit;
 573         }
 574
 575         /*
 576          * This information is still unknown what it can be used for.
 577          * If anyone has an idea, please let the author know...
 578          *
 579          * Rumor has it this endpoint is used to notify when data
 580          * is ready to be read from the bulk ones.
 581          */
 582         usb_serial_debug_data(debug, &port->dev, __func__,
 583                               urb->actual_length, urb->transfer_buffer);
 584
 585 exit:
 586         result = usb_submit_urb(urb, GFP_ATOMIC);
 587         if (result)
 588                 dev_err(&urb->dev->dev,
 589                                 "%s - Error %d submitting interrupt urb\n",
 590                                                         __func__, result);
 591 }
 592
 593 static void visor_throttle(struct tty_struct *tty)
 594 {
 595         struct usb_serial_port *port = tty->driver_data;
 596         struct visor_private *priv = usb_get_serial_port_data(port);
 597         unsigned long flags;
 598
 599         dbg("%s - port %d", __func__, port->number);
 600         spin_lock_irqsave(&priv->lock, flags);
 601         priv->throttled = 1;
 602         spin_unlock_irqrestore(&priv->lock, flags);
 603 }
 604
 605
 606 static void visor_unthrottle(struct tty_struct *tty)
 607 {
 608         struct usb_serial_port *port = tty->driver_data;
 609         struct visor_private *priv = usb_get_serial_port_data(port);
 610         unsigned long flags;
 611         int result;
 612
 613         dbg("%s - port %d", __func__, port->number);
 614         spin_lock_irqsave(&priv->lock, flags);
 615         priv->throttled = 0;
 616         priv->actually_throttled = 0;
 617         spin_unlock_irqrestore(&priv->lock, flags);
 618
 619         port->read_urb->dev = port->serial->dev;
 620         result = usb_submit_urb(port->read_urb, GFP_ATOMIC);
 621         if (result)
 622                 dev_err(&port->dev,
 623                         "%s - failed submitting read urb, error %d\n",
 624                                                         __func__, result);
 625 }
 626
 627 static int palm_os_3_probe(struct usb_serial *serial,
 628                                                 const struct usb_device_id *id)
 629 {
 630         struct device *dev = &serial->dev->dev;
 631         struct visor_connection_info *connection_info;
 632         unsigned char *transfer_buffer;
 633         char *string;
 634         int retval = 0;
 635         int i;
 636         int num_ports = 0;
 637
 638         dbg("%s", __func__);
 639
 640         transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL);
 641         if (!transfer_buffer) {
 642                 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
 643                         sizeof(*connection_info));
 644                 return -ENOMEM;
 645         }
 646
 647         /* send a get connection info request */
 648         retval = usb_control_msg(serial->dev,
 649                                   usb_rcvctrlpipe(serial->dev, 0),
 650                                   VISOR_GET_CONNECTION_INFORMATION,
 651                                   0xc2, 0x0000, 0x0000, transfer_buffer,
 652                                   sizeof(*connection_info), 300);
 653         if (retval < 0) {
 654                 dev_err(dev, "%s - error %d getting connection information\n",
 655                         __func__, retval);
 656                 goto exit;
 657         }
 658
 659         if (retval == sizeof(*connection_info)) {
 660                         connection_info = (struct visor_connection_info *)
 661                                                         transfer_buffer;
 662
 663                 num_ports = le16_to_cpu(connection_info->num_ports);
 664                 for (i = 0; i < num_ports; ++i) {
 665                         switch (
 666                            connection_info->connections[i].port_function_id) {
 667                         case VISOR_FUNCTION_GENERIC:
 668                                 string = "Generic";
 669                                 break;
 670                         case VISOR_FUNCTION_DEBUGGER:
 671                                 string = "Debugger";
 672                                 break;
 673                         case VISOR_FUNCTION_HOTSYNC:
 674                                 string = "HotSync";
 675                                 break;
 676                         case VISOR_FUNCTION_CONSOLE:
 677                                 string = "Console";
 678                                 break;
 679                         case VISOR_FUNCTION_REMOTE_FILE_SYS:
 680                                 string = "Remote File System";
 681                                 break;
 682                         default:
 683                                 string = "unknown";
 684                                 break;
 685                         }
 686                         dev_info(dev, "%s: port %d, is for %s use\n",
 687                                 serial->type->description,
 688                                 connection_info->connections[i].port, string);
 689                 }
 690         }
 691         /*
 692         * Handle devices that report invalid stuff here.
 693         */
 694         if (num_ports == 0 || num_ports > 2) {
 695                 dev_warn(dev, "%s: No valid connect info available\n",
 696                         serial->type->description);
 697                 num_ports = 2;
 698         }
 699
 700         dev_info(dev, "%s: Number of ports: %d\n", serial->type->description,
 701                 num_ports);
 702
 703         /*
 704          * save off our num_ports info so that we can use it in the
 705          * calc_num_ports callback
 706          */
 707         usb_set_serial_data(serial, (void *)(long)num_ports);
 708
 709         /* ask for the number of bytes available, but ignore the
 710            response as it is broken */
 711         retval = usb_control_msg(serial->dev,
 712                                   usb_rcvctrlpipe(serial->dev, 0),
 713                                   VISOR_REQUEST_BYTES_AVAILABLE,
 714                                   0xc2, 0x0000, 0x0005, transfer_buffer,
 715                                   0x02, 300);
 716         if (retval < 0)
 717                 dev_err(dev, "%s - error %d getting bytes available request\n",
 718                         __func__, retval);
 719         retval = 0;
 720
 721 exit:
 722         kfree(transfer_buffer);
 723
 724         return retval;
 725 }
 726
 727 static int palm_os_4_probe(struct usb_serial *serial,
 728                                                 const struct usb_device_id *id)
 729 {
 730         struct device *dev = &serial->dev->dev;
 731         struct palm_ext_connection_info *connection_info;
 732         unsigned char *transfer_buffer;
 733         int retval;
 734
 735         dbg("%s", __func__);
 736
 737         transfer_buffer =  kmalloc(sizeof(*connection_info), GFP_KERNEL);
 738         if (!transfer_buffer) {
 739                 dev_err(dev, "%s - kmalloc(%Zd) failed.\n", __func__,
 740                         sizeof(*connection_info));
 741                 return -ENOMEM;
 742         }
 743
 744         retval = usb_control_msg(serial->dev,
 745                                   usb_rcvctrlpipe(serial->dev, 0),
 746                                   PALM_GET_EXT_CONNECTION_INFORMATION,
 747                                   0xc2, 0x0000, 0x0000, transfer_buffer,
 748                                   sizeof(*connection_info), 300);
 749         if (retval < 0)
 750                 dev_err(dev, "%s - error %d getting connection info\n",
 751                         __func__, retval);
 752         else
 753                 usb_serial_debug_data(debug, &serial->dev->dev, __func__,
 754                                       retval, transfer_buffer);
 755
 756         kfree(transfer_buffer);
 757         return 0;
 758 }
 759
 760
 761 static int visor_probe(struct usb_serial *serial,
 762                                         const struct usb_device_id *id)
 763 {
 764         int retval = 0;
 765         int (*startup)(struct usb_serial *serial,
 766                                         const struct usb_device_id *id);
 767
 768         dbg("%s", __func__);
 769
 770         if (serial->dev->actconfig->desc.bConfigurationValue != 1) {
 771                 err("active config #%d != 1 ??",
 772                         serial->dev->actconfig->desc.bConfigurationValue);
 773                 return -ENODEV;
 774         }
 775
 776         if (id->driver_info) {
 777                 startup = (void *)id->driver_info;
 778                 retval = startup(serial, id);
 779         }
 780
 781         return retval;
 782 }
 783
 784 static int visor_calc_num_ports(struct usb_serial *serial)
 785 {
 786         int num_ports = (int)(long)(usb_get_serial_data(serial));
 787
 788         if (num_ports)
 789                 usb_set_serial_data(serial, NULL);
 790
 791         return num_ports;
 792 }
 793
 794 static int generic_startup(struct usb_serial *serial)
 795 {
 796         struct usb_serial_port **ports = serial->port;
 797         struct visor_private *priv;
 798         int i;
 799
 800         for (i = 0; i < serial->num_ports; ++i) {
 801                 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 802                 if (!priv) {
 803                         while (i-- != 0) {
 804                                 priv = usb_get_serial_port_data(ports[i]);
 805                                 usb_set_serial_port_data(ports[i], NULL);
 806                                 kfree(priv);
 807                         }
 808                         return -ENOMEM;
 809                 }
 810                 spin_lock_init(&priv->lock);
 811                 usb_set_serial_port_data(ports[i], priv);
 812         }
 813         return 0;
 814 }
 815
 816 static int clie_3_5_startup(struct usb_serial *serial)
 817 {
 818         struct device *dev = &serial->dev->dev;
 819         int result;
 820         u8 data;
 821
 822         dbg("%s", __func__);
 823
 824         /*
 825          * Note that PEG-300 series devices expect the following two calls.
 826          */
 827
 828         /* get the config number */
 829         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 830                                   USB_REQ_GET_CONFIGURATION, USB_DIR_IN,
 831                                   0, 0, &data, 1, 3000);
 832         if (result < 0) {
 833                 dev_err(dev, "%s: get config number failed: %d\n",
 834                                                         __func__, result);
 835                 return result;
 836         }
 837         if (result != 1) {
 838                 dev_err(dev, "%s: get config number bad return length: %d\n",
 839                                                         __func__, result);
 840                 return -EIO;
 841         }
 842
 843         /* get the interface number */
 844         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 845                                   USB_REQ_GET_INTERFACE,
 846                                   USB_DIR_IN | USB_RECIP_INTERFACE,
 847                                   0, 0, &data, 1, 3000);
 848         if (result < 0) {
 849                 dev_err(dev, "%s: get interface number failed: %d\n",
 850                                                         __func__, result);
 851                 return result;
 852         }
 853         if (result != 1) {
 854                 dev_err(dev,
 855                         "%s: get interface number bad return length: %d\n",
 856                                                         __func__, result);
 857                 return -EIO;
 858         }
 859
 860         return generic_startup(serial);
 861 }
 862
 863 static int treo_attach(struct usb_serial *serial)
 864 {
 865         struct usb_serial_port *swap_port;
 866
 867         /* Only do this endpoint hack for the Handspring devices with
 868          * interrupt in endpoints, which for now are the Treo devices. */
 869         if (!((le16_to_cpu(serial->dev->descriptor.idVendor)
 870                                                 == HANDSPRING_VENDOR_ID) ||
 871                 (le16_to_cpu(serial->dev->descriptor.idVendor)
 872                                                 == KYOCERA_VENDOR_ID)) ||
 873                 (serial->num_interrupt_in == 0))
 874                 goto generic_startup;
 875
 876         dbg("%s", __func__);
 877
 878         /*
 879         * It appears that Treos and Kyoceras want to use the
 880         * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint,
 881         * so let's swap the 1st and 2nd bulk in and interrupt endpoints.
 882         * Note that swapping the bulk out endpoints would break lots of
 883         * apps that want to communicate on the second port.
 884         */
 885 #define COPY_PORT(dest, src)                                            \
 886         do { \
 887                 dest->read_urb = src->read_urb;                         \
 888                 dest->bulk_in_endpointAddress = src->bulk_in_endpointAddress;\
 889                 dest->bulk_in_buffer = src->bulk_in_buffer;             \
 890                 dest->interrupt_in_urb = src->interrupt_in_urb;         \
 891                 dest->interrupt_in_endpointAddress = \
 892                                         src->interrupt_in_endpointAddress;\
 893                 dest->interrupt_in_buffer = src->interrupt_in_buffer;   \
 894         } while (0);
 895
 896         swap_port = kmalloc(sizeof(*swap_port), GFP_KERNEL);
 897         if (!swap_port)
 898                 return -ENOMEM;
 899         COPY_PORT(swap_port, serial->port[0]);
 900         COPY_PORT(serial->port[0], serial->port[1]);
 901         COPY_PORT(serial->port[1], swap_port);
 902         kfree(swap_port);
 903
 904 generic_startup:
 905         return generic_startup(serial);
 906 }
 907
 908 static int clie_5_attach(struct usb_serial *serial)
 909 {
 910         dbg("%s", __func__);
 911
 912         /* TH55 registers 2 ports.
 913            Communication in from the UX50/TH55 uses bulk_in_endpointAddress
 914            from port 0. Communication out to the UX50/TH55 uses
 915            bulk_out_endpointAddress from port 1
 916
 917            Lets do a quick and dirty mapping
 918          */
 919
 920         /* some sanity check */
 921         if (serial->num_ports < 2)
 922                 return -1;
 923
 924         /* port 0 now uses the modified endpoint Address */
 925         serial->port[0]->bulk_out_endpointAddress =
 926                                 serial->port[1]->bulk_out_endpointAddress;
 927
 928         return generic_startup(serial);
 929 }
 930
 931 static void visor_shutdown(struct usb_serial *serial)
 932 {
 933         struct visor_private *priv;
 934         int i;
 935
 936         dbg("%s", __func__);
 937
 938         for (i = 0; i < serial->num_ports; i++) {
 939                 priv = usb_get_serial_port_data(serial->port[i]);
 940                 if (priv) {
 941                         usb_set_serial_port_data(serial->port[i], NULL);
 942                         kfree(priv);
 943                 }
 944         }
 945 }
 946
 947 static int __init visor_init(void)
 948 {
 949         int i, retval;
 950         /* Only if parameters were passed to us */
 951         if (vendor > 0 && product > 0) {
 952                 struct usb_device_id usb_dev_temp[] = {
 953                         {
 954                                 USB_DEVICE(vendor, product),
 955                                 .driver_info =
 956                                         (kernel_ulong_t) &palm_os_4_probe
 957                         }
 958                 };
 959
 960                 /* Find the last entry in id_table */
 961                 for (i = 0;; i++) {
 962                         if (id_table[i].idVendor == 0) {
 963                                 id_table[i] = usb_dev_temp[0];
 964                                 break;
 965                         }
 966                 }
 967                 /* Find the last entry in id_table_combined */
 968                 for (i = 0;; i++) {
 969                         if (id_table_combined[i].idVendor == 0) {
 970                                 id_table_combined[i] = usb_dev_temp[0];
 971                                 break;
 972                         }
 973                 }
 974                 info(
 975                   "Untested USB device specified at time of module insertion");
 976                 info("Warning: This is not guaranteed to work");
 977                 info("Using a newer kernel is preferred to this method");
 978                 info("Adding Palm OS protocol 4.x support for unknown device: 0x%x/0x%x",
 979                         vendor, product);
 980         }
 981         retval = usb_serial_register(&handspring_device);
 982         if (retval)
 983                 goto failed_handspring_register;
 984         retval = usb_serial_register(&clie_3_5_device);
 985         if (retval)
 986                 goto failed_clie_3_5_register;
 987         retval = usb_serial_register(&clie_5_device);
 988         if (retval)
 989                 goto failed_clie_5_register;
 990         retval = usb_register(&visor_driver);
 991         if (retval)
 992                 goto failed_usb_register;
 993         info(DRIVER_DESC);
 994
 995         return 0;
 996 failed_usb_register:
 997         usb_serial_deregister(&clie_5_device);
 998 failed_clie_5_register:
 999         usb_serial_deregister(&clie_3_5_device);
1000 failed_clie_3_5_register:
1001         usb_serial_deregister(&handspring_device);
1002 failed_handspring_register:
1003         return retval;
1004 }
1005
1006
1007 static void __exit visor_exit (void)
1008 {
1009         usb_deregister(&visor_driver);
1010         usb_serial_deregister(&handspring_device);
1011         usb_serial_deregister(&clie_3_5_device);
1012         usb_serial_deregister(&clie_5_device);
1013 }
1014
1015
1016 module_init(visor_init);
1017 module_exit(visor_exit);
1018
1019 MODULE_AUTHOR(DRIVER_AUTHOR);
1020 MODULE_DESCRIPTION(DRIVER_DESC);
1021 MODULE_LICENSE("GPL");
1022
1023 module_param(debug, bool, S_IRUGO | S_IWUSR);
1024 MODULE_PARM_DESC(debug, "Debug enabled or not");
1025 module_param(stats, bool, S_IRUGO | S_IWUSR);
1026 MODULE_PARM_DESC(stats, "Enables statistics or not");
1027
1028 module_param(vendor, ushort, 0);
1029 MODULE_PARM_DESC(vendor, "User specified vendor ID");
1030 module_param(product, ushort, 0);
1031 MODULE_PARM_DESC(product, "User specified product ID");
1032