drivers/usb/serial/io_edgeport.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      Edgeport/4
  14  *      Edgeport/4t
  15  *      Edgeport/2
  16  *      Edgeport/4i
  17  *      Edgeport/2i
  18  *      Edgeport/421
  19  *      Edgeport/21
  20  *      Rapidport/4
  21  *      Edgeport/8
  22  *      Edgeport/2D8
  23  *      Edgeport/4D8
  24  *      Edgeport/8i
  25  *
  26  * For questions or problems with this driver, contact Inside Out
  27  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  28  * or Al Borchers <alborchers@steinerpoint.com>.
  29  *
  30  * Version history:
  31  *
  32  * 2003_04_03 al borchers
  33  *  - fixed a bug (that shows up with dosemu) where the tty struct is
  34  *    used in a callback after it has been freed
  35  *
  36  * 2.3 2002_03_08 greg kroah-hartman
  37  *      - fixed bug when multiple devices were attached at the same time.
  38  *
  39  * 2.2 2001_11_14 greg kroah-hartman
  40  *      - fixed bug in edge_close that kept the port from being used more
  41  *        than once.
  42  *      - fixed memory leak on device removal.
  43  *      - fixed potential double free of memory when command urb submitting
  44  *        failed.
  45  *      - other small cleanups when the device is removed
  46  *
  47  * 2.1 2001_07_09 greg kroah-hartman
  48  *      - added support for TIOCMBIS and TIOCMBIC.
  49  *
  50  *     (04/08/2001) gb
  51  *      - Identify version on module load.
  52  *
  53  * 2.0 2001_03_05 greg kroah-hartman
  54  *      - reworked entire driver to fit properly in with the other usb-serial
  55  *        drivers.  Occasional oopses still happen, but it's a good start.
  56  *
  57  * 1.2.3 (02/23/2001) greg kroah-hartman
  58  *      - changed device table to work properly for 2.4.x final format.
  59  *      - fixed problem with dropping data at high data rates.
  60  *
  61  * 1.2.2 (11/27/2000) greg kroah-hartman
  62  *      - cleaned up more NTisms.
  63  *      - Added device table for 2.4.0-test11
  64  *
  65  * 1.2.1 (11/08/2000) greg kroah-hartman
  66  *      - Started to clean up NTisms.
  67  *      - Fixed problem with dev field of urb for kernels >= 2.4.0-test9
  68  *
  69  * 1.2 (10/17/2000) David Iacovelli
  70  *      Remove all EPIC code and GPL source
  71  *  Fix RELEVANT_IFLAG macro to include flow control
  72  *  changes port configuration changes.
  73  *  Fix redefinition of SERIAL_MAGIC
  74  *  Change all timeout values to 5 seconds
  75  *  Tried to fix the UHCI multiple urb submission, but failed miserably.
  76  *  it seems to work fine with OHCI.
  77  *  ( Greg take a look at the #if 0 at end of WriteCmdUsb() we must
  78  *    find a way to work arount this UHCI bug )
  79  *
  80  * 1.1 (10/11/2000) David Iacovelli
  81  *  Fix XON/XOFF flow control to support both IXON and IXOFF
  82  *
  83  * 0.9.27 (06/30/2000) David Iacovelli
  84  *  Added transmit queue and now allocate urb for command writes.
  85  *
  86  * 0.9.26 (06/29/2000) David Iacovelli
  87  *  Add support for 80251 based edgeport
  88  *
  89  * 0.9.25 (06/27/2000) David Iacovelli
  90  *  Do not close the port if it has multiple opens.
  91  *
  92  * 0.9.24 (05/26/2000) David Iacovelli
  93  *  Add IOCTLs to support RXTX and JAVA POS
  94  *  and first cut at running BlackBox Demo
  95  *
  96  * 0.9.23 (05/24/2000) David Iacovelli
  97  *  Add IOCTLs to support RXTX and JAVA POS
  98  *
  99  * 0.9.22 (05/23/2000) David Iacovelli
 100  *  fixed bug in enumeration.  If epconfig turns on mapping by
 101  *  path after a device is already plugged in, we now update
 102  *  the mapping correctly
 103  *
 104  * 0.9.21 (05/16/2000) David Iacovelli
 105  *  Added BlockUntilChaseResp() to also wait for txcredits
 106  *  Updated the way we allocate and handle write URBs
 107  *      Add debug code to dump buffers
 108  *
 109  * 0.9.20 (05/01/2000) David Iacovelli
 110  *      change driver to use usb/tts/
 111  *
 112  * 0.9.19 (05/01/2000) David Iacovelli
 113  *  Update code to compile if DEBUG is off
 114  *
 115  * 0.9.18 (04/28/2000) David Iacovelli
 116  *  cleanup and test tty_register with devfs
 117  *
 118  * 0.9.17 (04/27/2000) greg kroah-hartman
 119  *      changed tty_register around to be like the way it
 120  *      was before, but now it works properly with devfs.
 121  *
 122  * 0.9.16 (04/26/2000) david iacovelli
 123  *  Fixed bug in GetProductInfo()
 124  *
 125  * 0.9.15 (04/25/2000) david iacovelli
 126  *      Updated enumeration
 127  *
 128  * 0.9.14 (04/24/2000) david iacovelli
 129  *  Removed all config/status IOCTLS and
 130  *  converted to using /proc/edgeport
 131  *  still playing with devfs
 132  *
 133  * 0.9.13 (04/24/2000) david iacovelli
 134  *  Removed configuration based on ttyUSB0
 135  *  Added support for configuration using /prod/edgeport
 136  *  first attempt at using devfs (not working yet!)
 137  *  Added IOCTL to GetProductInfo()
 138  *  Added support for custom baud rates
 139  *      Add support for random port numbers
 140  *
 141  * 0.9.12 (04/18/2000) david iacovelli
 142  *      added additional configuration IOCTLs
 143  *  use ttyUSB0 for configuration
 144  *
 145  * 0.9.11 (04/17/2000) greg kroah-hartman
 146  *      fixed module initialization race conditions.
 147  *      made all urbs dynamically allocated.
 148  *      made driver devfs compatible. now it only registers the tty device
 149  *      when the device is actually plugged in.
 150  *
 151  * 0.9.10 (04/13/2000) greg kroah-hartman
 152  *      added proc interface framework.
 153  *
 154  * 0.9.9 (04/13/2000) david iacovelli
 155  *      added enumeration code and ioctls to configure the device
 156  *
 157  * 0.9.8 (04/12/2000) david iacovelli
 158  *  Change interrupt read start when device is plugged in
 159  *  and stop when device is removed
 160  *      process interrupt reads when all ports are closed
 161  *  (keep value of rxBytesAvail consistent with the edgeport)
 162  *  set the USB_BULK_QUEUE flag so that we can shove a bunch
 163  *  of urbs at once down the pipe
 164  *
 165  * 0.9.7 (04/10/2000) david iacovelli
 166  *      start to add enumeration code.
 167  *  generate serial number for epic devices
 168  *  add support for kdb
 169  *
 170  * 0.9.6 (03/30/2000) david iacovelli
 171  *  add IOCTL to get string, manufacture, and boot descriptors
 172  *
 173  * 0.9.5 (03/14/2000) greg kroah-hartman
 174  *      more error checking added to SerialOpen to try to fix UHCI open problem
 175  *
 176  * 0.9.4 (03/09/2000) greg kroah-hartman
 177  *      added more error checking to handle oops when data is hanging
 178  *      around and tty is abruptly closed.
 179  *
 180  * 0.9.3 (03/09/2000) david iacovelli
 181  *      Add epic support for xon/xoff chars
 182  *      play with performance
 183  *
 184  * 0.9.2 (03/08/2000) greg kroah-hartman
 185  *      changed most "info" calls to "dbg"
 186  *      implemented flow control properly in the termios call
 187  *
 188  * 0.9.1 (03/08/2000) david iacovelli
 189  *      added EPIC support
 190  *      enabled bootloader update
 191  *
 192  * 0.9 (03/08/2000) greg kroah-hartman
 193  *      Release to IO networks.
 194  *      Integrated changes that David made
 195  *  made getting urbs for writing SMP safe
 196  *
 197  * 0.8 (03/07/2000) greg kroah-hartman
 198  *      Release to IO networks.
 199  *      Fixed problems that were seen in code by David.
 200  *  Now both Edgeport/4 and Edgeport/2 works properly.
 201  *  Changed most of the functions to use port instead of serial.
 202  *
 203  * 0.7 (02/27/2000) greg kroah-hartman
 204  *      Milestone 3 release.
 205  *      Release to IO Networks
 206  *      ioctl for waiting on line change implemented.
 207  *      ioctl for getting statistics implemented.
 208  *      multiport support working.
 209  *      lsr and msr registers are now handled properly.
 210  *      change break now hooked up and working.
 211  *      support for all known Edgeport devices.
 212  *
 213  * 0.6 (02/22/2000) greg kroah-hartman
 214  *      Release to IO networks.
 215  *      CHASE is implemented correctly when port is closed.
 216  *      SerialOpen now blocks correctly until port is fully opened.
 217  *
 218  * 0.5 (02/20/2000) greg kroah-hartman
 219  *      Release to IO networks.
 220  *      Known problems:
 221  *              modem status register changes are not sent on to the user
 222  *              CHASE is not implemented when the port is closed.
 223  *
 224  * 0.4 (02/16/2000) greg kroah-hartman
 225  *      Second cut at the CeBit demo.
 226  *      Doesn't leak memory on every write to the port
 227  *      Still small leaks on startup.
 228  *      Added support for Edgeport/2 and Edgeport/8
 229  *
 230  * 0.3 (02/15/2000) greg kroah-hartman
 231  *      CeBit demo release.
 232  *      Force the line settings to 4800, 8, 1, e for the demo.
 233  *      Warning! This version leaks memory like crazy!
 234  *
 235  * 0.2 (01/30/2000) greg kroah-hartman
 236  *      Milestone 1 release.
 237  *      Device is found by USB subsystem, enumerated, fimware is downloaded
 238  *      and the descriptors are printed to the debug log, config is set, and
 239  *      green light starts to blink. Open port works, and data can be sent
 240  *      and received at the default settings of the UART. Loopback connector
 241  *      and debug log confirms this.
 242  *
 243  * 0.1 (01/23/2000) greg kroah-hartman
 244  *      Initial release to help IO Networks try to set up their test system.
 245  *      Edgeport4 is recognized, firmware is downloaded, config is set so
 246  *      device blinks green light every 3 sec. Port is bound, but opening,
 247  *      closing, and sending data do not work properly.
 248  *
 249  */
 250
 251 #include <linux/config.h>
 252 #include <linux/kernel.h>
 253 #include <linux/jiffies.h>
 254 #include <linux/errno.h>
 255 #include <linux/init.h>
 256 #include <linux/slab.h>
 257 #include <linux/tty.h>
 258 #include <linux/tty_driver.h>
 259 #include <linux/tty_flip.h>
 260 #include <linux/module.h>
 261 #include <linux/spinlock.h>
 262 #include <linux/serial.h>
 263 #include <linux/ioctl.h>
 264 #include <asm/uaccess.h>
 265 #include <linux/usb.h>
 266 #include "usb-serial.h"
 267 #include "io_edgeport.h"
 268 #include "io_ionsp.h"           /* info for the iosp messages */
 269 #include "io_16654.h"           /* 16654 UART defines */
 270
 271 /*
 272  * Version Information
 273  */
 274 #define DRIVER_VERSION "v2.7"
 275 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
 276 #define DRIVER_DESC "Edgeport USB Serial Driver"
 277
 278 /* First, the latest boot code - for first generation edgeports */
 279 #define IMAGE_ARRAY_NAME        BootCodeImage_GEN1
 280 #define IMAGE_VERSION_NAME      BootCodeImageVersion_GEN1
 281 #include "io_fw_boot.h"         /* the bootloader firmware to download to a device, if it needs it */
 282
 283 /* for second generation edgeports */
 284 #define IMAGE_ARRAY_NAME        BootCodeImage_GEN2
 285 #define IMAGE_VERSION_NAME      BootCodeImageVersion_GEN2
 286 #include "io_fw_boot2.h"        /* the bootloader firmware to download to a device, if it needs it */
 287
 288 /* Then finally the main run-time operational code - for first generation edgeports */
 289 #define IMAGE_ARRAY_NAME        OperationalCodeImage_GEN1
 290 #define IMAGE_VERSION_NAME      OperationalCodeImageVersion_GEN1
 291 #include "io_fw_down.h"         /* Define array OperationalCodeImage[] */
 292
 293 /* for second generation edgeports */
 294 #define IMAGE_ARRAY_NAME        OperationalCodeImage_GEN2
 295 #define IMAGE_VERSION_NAME      OperationalCodeImageVersion_GEN2
 296 #include "io_fw_down2.h"        /* Define array OperationalCodeImage[] */
 297
 298 #define MAX_NAME_LEN            64
 299
 300 #define CHASE_TIMEOUT           (5*HZ)          /* 5 seconds */
 301 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
 302 #define COMMAND_TIMEOUT         (5*HZ)          /* 5 seconds */
 303
 304 /* receive port state */
 305 enum RXSTATE {
 306         EXPECT_HDR1 = 0,        /* Expect header byte 1 */
 307         EXPECT_HDR2 = 1,        /* Expect header byte 2 */
 308         EXPECT_DATA = 2,        /* Expect 'RxBytesRemaining' data */
 309         EXPECT_HDR3 = 3,        /* Expect header byte 3 (for status hdrs only) */
 310 };
 311
 312
 313 /* Transmit Fifo
 314  * This Transmit queue is an extension of the edgeport Rx buffer.
 315  * The maximum amount of data buffered in both the edgeport
 316  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
 317  */
 318 struct TxFifo {
 319         unsigned int    head;   /* index to head pointer (write) */
 320         unsigned int    tail;   /* index to tail pointer (read)  */
 321         unsigned int    count;  /* Bytes in queue */
 322         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
 323         unsigned char   *fifo;  /* allocated Buffer */
 324 };
 325
 326 /* This structure holds all of the local port information */
 327 struct edgeport_port {
 328         __u16                   txCredits;              /* our current credits for this port */
 329         __u16                   maxTxCredits;           /* the max size of the port */
 330
 331         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
 332         struct urb              *write_urb;             /* write URB for this port */
 333         char                    write_in_progress;      /* TRUE while a write URB is outstanding */
 334         spinlock_t              ep_lock;
 335
 336         __u8                    shadowLCR;              /* last LCR value received */
 337         __u8                    shadowMCR;              /* last MCR value received */
 338         __u8                    shadowMSR;              /* last MSR value received */
 339         __u8                    shadowLSR;              /* last LSR value received */
 340         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 341         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 342         __u8                    validDataMask;
 343         __u32                   baudRate;
 344
 345         char                    open;
 346         char                    openPending;
 347         char                    commandPending;
 348         char                    closePending;
 349         char                    chaseResponsePending;
 350
 351         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 352         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 353         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 354         wait_queue_head_t       delta_msr_wait;         /* for handling sleeping while waiting for msr change to happen */
 355
 356         struct async_icount     icount;
 357         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 358 };
 359
 360
 361 /* This structure holds all of the individual device information */
 362 struct edgeport_serial {
 363         char                    name[MAX_NAME_LEN+1];           /* string name of this device */
 364
 365         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 366         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 367         struct edgeport_product_info    product_info;           /* Product Info */
 368
 369         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 370         unsigned char *         interrupt_in_buffer;            /* the buffer we use for the interrupt endpoint */
 371         struct urb *            interrupt_read_urb;             /* our interrupt urb */
 372
 373         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 374         unsigned char *         bulk_in_buffer;                 /* the buffer we use for the bulk in endpoint */
 375         struct urb *            read_urb;                       /* our bulk read urb */
 376         int                     read_in_progress;
 377         spinlock_t              es_lock;
 378
 379         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 380
 381         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 382
 383         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 384         __u8                    rxHeader1;                      /* receive header byte 1 */
 385         __u8                    rxHeader2;                      /* receive header byte 2 */
 386         __u8                    rxHeader3;                      /* receive header byte 3 */
 387         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 388         __u8                    rxStatusCode;                   /* the receive status code */
 389         __u8                    rxStatusParam;                  /* the receive status paramater */
 390         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 391         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 392 };
 393
 394 /* baud rate information */
 395 struct divisor_table_entry {
 396         __u32   BaudRate;
 397         __u16  Divisor;
 398 };
 399
 400 //
 401 // Define table of divisors for Rev A EdgePort/4 hardware
 402 // These assume a 3.6864MHz crystal, the standard /16, and
 403 // MCR.7 = 0.
 404 //
 405 static struct divisor_table_entry divisor_table[] = {
 406         {   50,         4608},
 407         {   75,         3072},
 408         {   110,        2095},          /* 2094.545455 => 230450   => .0217 % over */
 409         {   134,        1713},          /* 1713.011152 => 230398.5 => .00065% under */
 410         {   150,        1536},
 411         {   300,        768},
 412         {   600,        384},
 413         {   1200,       192},
 414         {   1800,       128},
 415         {   2400,       96},
 416         {   4800,       48},
 417         {   7200,       32},
 418         {   9600,       24},
 419         {   14400,      16},
 420         {   19200,      12},
 421         {   38400,      6},
 422         {   57600,      4},
 423         {   115200,     2},
 424         {   230400,     1},
 425 };
 426
 427 /* local variables */
 428 static int debug;
 429
 430 static int low_latency = 1;     /* tty low latency flag, on by default */
 431
 432 static int CmdUrbs = 0;         /* Number of outstanding Command Write Urbs */
 433
 434
 435 /* local function prototypes */
 436
 437 /* function prototypes for all URB callbacks */
 438 static void edge_interrupt_callback     (struct urb *urb, struct pt_regs *regs);
 439 static void edge_bulk_in_callback       (struct urb *urb, struct pt_regs *regs);
 440 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs);
 441 static void edge_bulk_out_cmd_callback  (struct urb *urb, struct pt_regs *regs);
 442
 443 /* function prototypes for the usbserial callbacks */
 444 static int  edge_open                   (struct usb_serial_port *port, struct file *filp);
 445 static void edge_close                  (struct usb_serial_port *port, struct file *filp);
 446 static int  edge_write                  (struct usb_serial_port *port, const unsigned char *buf, int count);
 447 static int  edge_write_room             (struct usb_serial_port *port);
 448 static int  edge_chars_in_buffer        (struct usb_serial_port *port);
 449 static void edge_throttle               (struct usb_serial_port *port);
 450 static void edge_unthrottle             (struct usb_serial_port *port);
 451 static void edge_set_termios            (struct usb_serial_port *port, struct termios *old_termios);
 452 static int  edge_ioctl                  (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
 453 static void edge_break                  (struct usb_serial_port *port, int break_state);
 454 static int  edge_tiocmget               (struct usb_serial_port *port, struct file *file);
 455 static int  edge_tiocmset               (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
 456 static int  edge_startup                (struct usb_serial *serial);
 457 static void edge_shutdown               (struct usb_serial *serial);
 458
 459
 460 #include "io_tables.h"  /* all of the devices that this driver supports */
 461
 462 static struct usb_driver io_driver = {
 463         .owner =        THIS_MODULE,
 464         .name =         "io_edgeport",
 465         .probe =        usb_serial_probe,
 466         .disconnect =   usb_serial_disconnect,
 467         .id_table =     id_table_combined,
 468 };
 469
 470 /* function prototypes for all of our local functions */
 471 static void  process_rcvd_data          (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
 472 static void process_rcvd_status         (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
 473 static void edge_tty_recv                       (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
 474 static void handle_new_msr              (struct edgeport_port *edge_port, __u8 newMsr);
 475 static void handle_new_lsr              (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
 476 static int  send_iosp_ext_cmd           (struct edgeport_port *edge_port, __u8 command, __u8 param);
 477 static int  calc_baud_rate_divisor      (int baud_rate, int *divisor);
 478 static int  send_cmd_write_baud_rate    (struct edgeport_port *edge_port, int baudRate);
 479 static void change_port_settings        (struct edgeport_port *edge_port, struct termios *old_termios);
 480 static int  send_cmd_write_uart_register        (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
 481 static int  write_cmd_usb               (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
 482 static void send_more_port_data         (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
 483
 484 static int  sram_write                  (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 485 static int  rom_read                    (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 486 static int  rom_write                   (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 487 static void get_manufacturing_desc      (struct edgeport_serial *edge_serial);
 488 static void get_boot_desc               (struct edgeport_serial *edge_serial);
 489 static void load_application_firmware   (struct edgeport_serial *edge_serial);
 490
 491 static void unicode_to_ascii            (char *string, __le16 *unicode, int unicode_size);
 492
 493
 494 // ************************************************************************
 495 // ************************************************************************
 496 // ************************************************************************
 497 // ************************************************************************
 498
 499 /************************************************************************
 500  *                                                                      *
 501  * update_edgeport_E2PROM()     Compare current versions of             *
 502  *                              Boot ROM and Manufacture                *
 503  *                              Descriptors with versions               *
 504  *                              embedded in this driver                 *
 505  *                                                                      *
 506  ************************************************************************/
 507 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
 508 {
 509         __u32 BootCurVer;
 510         __u32 BootNewVer;
 511         __u8 BootMajorVersion;
 512         __u8 BootMinorVersion;
 513         __le16 BootBuildNumber;
 514         __u8 *BootImage;
 515         __u32 BootSize;
 516         struct edge_firmware_image_record *record;
 517         unsigned char *firmware;
 518         int response;
 519
 520
 521         switch (edge_serial->product_info.iDownloadFile) {
 522                 case EDGE_DOWNLOAD_FILE_I930:
 523                         BootMajorVersion        = BootCodeImageVersion_GEN1.MajorVersion;
 524                         BootMinorVersion        = BootCodeImageVersion_GEN1.MinorVersion;
 525                         BootBuildNumber         = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber);
 526                         BootImage               = &BootCodeImage_GEN1[0];
 527                         BootSize                = sizeof( BootCodeImage_GEN1 );
 528                         break;
 529
 530                 case EDGE_DOWNLOAD_FILE_80251:
 531                         BootMajorVersion        = BootCodeImageVersion_GEN2.MajorVersion;
 532                         BootMinorVersion        = BootCodeImageVersion_GEN2.MinorVersion;
 533                         BootBuildNumber         = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber);
 534                         BootImage               = &BootCodeImage_GEN2[0];
 535                         BootSize                = sizeof( BootCodeImage_GEN2 );
 536                         break;
 537
 538                 default:
 539                         return;
 540         }
 541
 542         // Check Boot Image Version
 543         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 544                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 545                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 546
 547         BootNewVer = (BootMajorVersion << 24) +
 548                      (BootMinorVersion << 16) +
 549                       le16_to_cpu(BootBuildNumber);
 550
 551         dbg("Current Boot Image version %d.%d.%d",
 552             edge_serial->boot_descriptor.MajorVersion,
 553             edge_serial->boot_descriptor.MinorVersion,
 554             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 555
 556
 557         if (BootNewVer > BootCurVer) {
 558                 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
 559                     edge_serial->boot_descriptor.MajorVersion,
 560                     edge_serial->boot_descriptor.MinorVersion,
 561                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 562                     BootMajorVersion,
 563                     BootMinorVersion,
 564                     le16_to_cpu(BootBuildNumber));
 565
 566
 567                 dbg("Downloading new Boot Image");
 568
 569                 firmware = BootImage;
 570
 571                 for (;;) {
 572                         record = (struct edge_firmware_image_record *)firmware;
 573                         response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
 574                         if (response < 0) {
 575                                 dev_err(&edge_serial->serial->dev->dev, "rom_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
 576                                 break;
 577                         }
 578                         firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
 579                         if (firmware >= &BootImage[BootSize]) {
 580                                 break;
 581                         }
 582                 }
 583         } else {
 584                 dbg("Boot Image -- already up to date");
 585         }
 586 }
 587
 588
 589 /************************************************************************
 590  *                                                                      *
 591  *  Get string descriptor from device                                   *
 592  *                                                                      *
 593  ************************************************************************/
 594 static int get_string (struct usb_device *dev, int Id, char *string)
 595 {
 596         struct usb_string_descriptor StringDesc;
 597         struct usb_string_descriptor *pStringDesc;
 598
 599         dbg("%s - USB String ID = %d", __FUNCTION__, Id );
 600
 601         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
 602                 return 0;
 603         }
 604
 605         pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
 606
 607         if (!pStringDesc) {
 608                 return 0;
 609         }
 610
 611         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
 612                 kfree(pStringDesc);
 613                 return 0;
 614         }
 615
 616         unicode_to_ascii(string,  pStringDesc->wData,     pStringDesc->bLength/2-1);
 617
 618         kfree(pStringDesc);
 619         return strlen(string);
 620 }
 621
 622
 623 #if 0
 624 /************************************************************************
 625  *
 626  *  Get string descriptor from device
 627  *
 628  ************************************************************************/
 629 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
 630 {
 631         struct usb_string_descriptor StringDesc;
 632         struct usb_string_descriptor *pStringDesc;
 633
 634         dbg("%s - USB String ID = %d", __FUNCTION__, Id );
 635
 636         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
 637                 return 0;
 638         }
 639
 640         pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
 641
 642         if (!pStringDesc) {
 643                 return -1;
 644         }
 645
 646         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
 647                 kfree(pStringDesc);
 648                 return -1;
 649         }
 650
 651         *pRetDesc = pStringDesc;
 652         return 0;
 653 }
 654 #endif
 655
 656 static void get_product_info(struct edgeport_serial *edge_serial)
 657 {
 658         struct edgeport_product_info *product_info = &edge_serial->product_info;
 659
 660         memset (product_info, 0, sizeof(struct edgeport_product_info));
 661
 662         product_info->ProductId         = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 663         product_info->NumPorts          = edge_serial->manuf_descriptor.NumPorts;
 664         product_info->ProdInfoVer       = 0;
 665
 666         product_info->RomSize           = edge_serial->manuf_descriptor.RomSize;
 667         product_info->RamSize           = edge_serial->manuf_descriptor.RamSize;
 668         product_info->CpuRev            = edge_serial->manuf_descriptor.CpuRev;
 669         product_info->BoardRev          = edge_serial->manuf_descriptor.BoardRev;
 670
 671         product_info->BootMajorVersion  = edge_serial->boot_descriptor.MajorVersion;
 672         product_info->BootMinorVersion  = edge_serial->boot_descriptor.MinorVersion;
 673         product_info->BootBuildNumber   = edge_serial->boot_descriptor.BuildNumber;
 674
 675         memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
 676
 677         // check if this is 2nd generation hardware
 678         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
 679                 product_info->FirmwareMajorVersion      = OperationalCodeImageVersion_GEN2.MajorVersion;
 680                 product_info->FirmwareMinorVersion      = OperationalCodeImageVersion_GEN2.MinorVersion;
 681                 product_info->FirmwareBuildNumber       = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber);
 682                 product_info->iDownloadFile             = EDGE_DOWNLOAD_FILE_80251;
 683         } else {
 684                 product_info->FirmwareMajorVersion      = OperationalCodeImageVersion_GEN1.MajorVersion;
 685                 product_info->FirmwareMinorVersion      = OperationalCodeImageVersion_GEN1.MinorVersion;
 686                 product_info->FirmwareBuildNumber       = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber);
 687                 product_info->iDownloadFile             = EDGE_DOWNLOAD_FILE_I930;
 688         }
 689
 690         // Determine Product type and set appropriate flags
 691         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 692                 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 693                 case ION_DEVICE_ID_EDGEPORT_4T:
 694                 case ION_DEVICE_ID_EDGEPORT_4:
 695                 case ION_DEVICE_ID_EDGEPORT_2:
 696                 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 697                 case ION_DEVICE_ID_EDGEPORT_8:
 698                 case ION_DEVICE_ID_EDGEPORT_421:
 699                 case ION_DEVICE_ID_EDGEPORT_21:
 700                 case ION_DEVICE_ID_EDGEPORT_2_DIN:
 701                 case ION_DEVICE_ID_EDGEPORT_4_DIN:
 702                 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 703                         product_info->IsRS232 = 1;
 704                         break;
 705
 706                 case ION_DEVICE_ID_EDGEPORT_2I:                            // Edgeport/2 RS422/RS485
 707                         product_info->IsRS422 = 1;
 708                         product_info->IsRS485 = 1;
 709                         break;
 710
 711                 case ION_DEVICE_ID_EDGEPORT_8I:                            // Edgeport/4 RS422
 712                 case ION_DEVICE_ID_EDGEPORT_4I:                            // Edgeport/4 RS422
 713                         product_info->IsRS422 = 1;
 714                         break;
 715         }
 716
 717         // Dump Product Info structure
 718         dbg("**Product Information:");
 719         dbg("  ProductId             %x", product_info->ProductId );
 720         dbg("  NumPorts              %d", product_info->NumPorts );
 721         dbg("  ProdInfoVer           %d", product_info->ProdInfoVer );
 722         dbg("  IsServer              %d", product_info->IsServer);
 723         dbg("  IsRS232               %d", product_info->IsRS232 );
 724         dbg("  IsRS422               %d", product_info->IsRS422 );
 725         dbg("  IsRS485               %d", product_info->IsRS485 );
 726         dbg("  RomSize               %d", product_info->RomSize );
 727         dbg("  RamSize               %d", product_info->RamSize );
 728         dbg("  CpuRev                %x", product_info->CpuRev  );
 729         dbg("  BoardRev              %x", product_info->BoardRev);
 730         dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
 731             product_info->BootMinorVersion,
 732             le16_to_cpu(product_info->BootBuildNumber));
 733         dbg("  FirmwareMajorVersion  %d.%d.%d", product_info->FirmwareMajorVersion,
 734             product_info->FirmwareMinorVersion,
 735             le16_to_cpu(product_info->FirmwareBuildNumber));
 736         dbg("  ManufactureDescDate   %d/%d/%d", product_info->ManufactureDescDate[0],
 737             product_info->ManufactureDescDate[1],
 738             product_info->ManufactureDescDate[2]+1900);
 739         dbg("  iDownloadFile         0x%x",     product_info->iDownloadFile);
 740
 741 }
 742
 743
 744 /************************************************************************/
 745 /************************************************************************/
 746 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 747 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 748 /************************************************************************/
 749 /************************************************************************/
 750
 751 /*****************************************************************************
 752  * edge_interrupt_callback
 753  *      this is the callback function for when we have received data on the
 754  *      interrupt endpoint.
 755  *****************************************************************************/
 756 static void edge_interrupt_callback (struct urb *urb, struct pt_regs *regs)
 757 {
 758         struct edgeport_serial  *edge_serial = (struct edgeport_serial *)urb->context;
 759         struct edgeport_port *edge_port;
 760         struct usb_serial_port *port;
 761         unsigned char *data = urb->transfer_buffer;
 762         int length = urb->actual_length;
 763         int bytes_avail;
 764         int position;
 765         int txCredits;
 766         int portNumber;
 767         int result;
 768
 769         dbg("%s", __FUNCTION__);
 770
 771         switch (urb->status) {
 772         case 0:
 773                 /* success */
 774                 break;
 775         case -ECONNRESET:
 776         case -ENOENT:
 777         case -ESHUTDOWN:
 778                 /* this urb is terminated, clean up */
 779                 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
 780                 return;
 781         default:
 782                 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
 783                 goto exit;
 784         }
 785
 786         // process this interrupt-read even if there are no ports open
 787         if (length) {
 788                 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
 789
 790                 if (length > 1) {
 791                         bytes_avail = data[0] | (data[1] << 8);
 792                         if (bytes_avail) {
 793                                 spin_lock(&edge_serial->es_lock);
 794                                 edge_serial->rxBytesAvail += bytes_avail;
 795                                 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
 796
 797                                 if (edge_serial->rxBytesAvail > 0 &&
 798                                     !edge_serial->read_in_progress) {
 799                                         dbg("%s - posting a read", __FUNCTION__);
 800                                         edge_serial->read_in_progress = TRUE;
 801
 802                                         /* we have pending bytes on the bulk in pipe, send a request */
 803                                         edge_serial->read_urb->dev = edge_serial->serial->dev;
 804                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 805                                         if (result) {
 806                                                 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result);
 807                                                 edge_serial->read_in_progress = FALSE;
 808                                         }
 809                                 }
 810                                 spin_unlock(&edge_serial->es_lock);
 811                         }
 812                 }
 813                 /* grab the txcredits for the ports if available */
 814                 position = 2;
 815                 portNumber = 0;
 816                 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
 817                         txCredits = data[position] | (data[position+1] << 8);
 818                         if (txCredits) {
 819                                 port = edge_serial->serial->port[portNumber];
 820                                 edge_port = usb_get_serial_port_data(port);
 821                                 if (edge_port->open) {
 822                                         spin_lock(&edge_port->ep_lock);
 823                                         edge_port->txCredits += txCredits;
 824                                         spin_unlock(&edge_port->ep_lock);
 825                                         dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits);
 826
 827                                         /* tell the tty driver that something has changed */
 828                                         if (edge_port->port->tty)
 829                                                 tty_wakeup(edge_port->port->tty);
 830
 831                                         // Since we have more credit, check if more data can be sent
 832                                         send_more_port_data(edge_serial, edge_port);
 833                                 }
 834                         }
 835                         position += 2;
 836                         ++portNumber;
 837                 }
 838         }
 839
 840 exit:
 841         result = usb_submit_urb (urb, GFP_ATOMIC);
 842         if (result) {
 843                 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
 844         }
 845 }
 846
 847
 848 /*****************************************************************************
 849  * edge_bulk_in_callback
 850  *      this is the callback function for when we have received data on the
 851  *      bulk in endpoint.
 852  *****************************************************************************/
 853 static void edge_bulk_in_callback (struct urb *urb, struct pt_regs *regs)
 854 {
 855         struct edgeport_serial  *edge_serial = (struct edgeport_serial *)urb->context;
 856         unsigned char           *data = urb->transfer_buffer;
 857         int                     status;
 858         __u16                   raw_data_length;
 859
 860         dbg("%s", __FUNCTION__);
 861
 862         if (urb->status) {
 863                 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
 864                 edge_serial->read_in_progress = FALSE;
 865                 return;
 866         }
 867
 868         if (urb->actual_length == 0) {
 869                 dbg("%s - read bulk callback with no data", __FUNCTION__);
 870                 edge_serial->read_in_progress = FALSE;
 871                 return;
 872         }
 873
 874         raw_data_length = urb->actual_length;
 875
 876         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data);
 877
 878         spin_lock(&edge_serial->es_lock);
 879
 880         /* decrement our rxBytes available by the number that we just got */
 881         edge_serial->rxBytesAvail -= raw_data_length;
 882
 883         dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail);
 884
 885         process_rcvd_data (edge_serial, data, urb->actual_length);
 886
 887         /* check to see if there's any more data for us to read */
 888         if (edge_serial->rxBytesAvail > 0) {
 889                 dbg("%s - posting a read", __FUNCTION__);
 890                 edge_serial->read_urb->dev = edge_serial->serial->dev;
 891                 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 892                 if (status) {
 893                         dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status);
 894                         edge_serial->read_in_progress = FALSE;
 895                 }
 896         } else {
 897                 edge_serial->read_in_progress = FALSE;
 898         }
 899
 900         spin_unlock(&edge_serial->es_lock);
 901 }
 902
 903
 904 /*****************************************************************************
 905  * edge_bulk_out_data_callback
 906  *      this is the callback function for when we have finished sending serial data
 907  *      on the bulk out endpoint.
 908  *****************************************************************************/
 909 static void edge_bulk_out_data_callback (struct urb *urb, struct pt_regs *regs)
 910 {
 911         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
 912         struct tty_struct *tty;
 913
 914         dbg("%s", __FUNCTION__);
 915
 916         if (urb->status) {
 917                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
 918         }
 919
 920         tty = edge_port->port->tty;
 921
 922         if (tty && edge_port->open) {
 923                 /* let the tty driver wakeup if it has a special write_wakeup function */
 924                 tty_wakeup(tty);
 925         }
 926
 927         // Release the Write URB
 928         edge_port->write_in_progress = FALSE;
 929
 930         // Check if more data needs to be sent
 931         send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
 932 }
 933
 934
 935 /*****************************************************************************
 936  * BulkOutCmdCallback
 937  *      this is the callback function for when we have finished sending a command
 938  *      on the bulk out endpoint.
 939  *****************************************************************************/
 940 static void edge_bulk_out_cmd_callback (struct urb *urb, struct pt_regs *regs)
 941 {
 942         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
 943         struct tty_struct *tty;
 944         int status = urb->status;
 945
 946         dbg("%s", __FUNCTION__);
 947
 948         CmdUrbs--;
 949         dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
 950
 951
 952         /* clean up the transfer buffer */
 953         if (urb->transfer_buffer != NULL) {
 954                 kfree(urb->transfer_buffer);
 955         }
 956
 957         /* Free the command urb */
 958         usb_free_urb (urb);
 959
 960         if (status) {
 961                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
 962                 return;
 963         }
 964
 965         /* Get pointer to tty */
 966         tty = edge_port->port->tty;
 967
 968         /* tell the tty driver that something has changed */
 969         if (tty && edge_port->open)
 970                 tty_wakeup(tty);
 971
 972         /* we have completed the command */
 973         edge_port->commandPending = FALSE;
 974         wake_up_interruptible(&edge_port->wait_command);
 975 }
 976
 977
 978 /*****************************************************************************
 979  * Driver tty interface functions
 980  *****************************************************************************/
 981
 982 /*****************************************************************************
 983  * SerialOpen
 984  *      this function is called by the tty driver when a port is opened
 985  *      If successful, we return 0
 986  *      Otherwise we return a negative error number.
 987  *****************************************************************************/
 988 static int edge_open (struct usb_serial_port *port, struct file * filp)
 989 {
 990         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 991         struct usb_serial *serial;
 992         struct edgeport_serial *edge_serial;
 993         int response;
 994         int timeout;
 995
 996         dbg("%s - port %d", __FUNCTION__, port->number);
 997
 998         if (edge_port == NULL)
 999                 return -ENODEV;
1000
1001         if (port->tty)
1002                 port->tty->low_latency = low_latency;
1003
1004         /* see if we've set up our endpoint info yet (can't set it up in edge_startup
1005            as the structures were not set up at that time.) */
1006         serial = port->serial;
1007         edge_serial = usb_get_serial_data(serial);
1008         if (edge_serial == NULL) {
1009                 return -ENODEV;
1010         }
1011         if (edge_serial->interrupt_in_buffer == NULL) {
1012                 struct usb_serial_port *port0 = serial->port[0];
1013
1014                 /* not set up yet, so do it now */
1015                 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
1016                 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
1017                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
1018                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
1019                 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
1020                 edge_serial->read_urb = port0->read_urb;
1021                 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
1022
1023                 /* set up our interrupt urb */
1024                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
1025                                  serial->dev,
1026                                  usb_rcvintpipe(serial->dev,
1027                                                 port0->interrupt_in_endpointAddress),
1028                                  port0->interrupt_in_buffer,
1029                                  edge_serial->interrupt_read_urb->transfer_buffer_length,
1030                                  edge_interrupt_callback, edge_serial,
1031                                  edge_serial->interrupt_read_urb->interval);
1032
1033                 /* set up our bulk in urb */
1034                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
1035                                   usb_rcvbulkpipe(serial->dev,
1036                                                   port0->bulk_in_endpointAddress),
1037                                   port0->bulk_in_buffer,
1038                                   edge_serial->read_urb->transfer_buffer_length,
1039                                   edge_bulk_in_callback, edge_serial);
1040                 edge_serial->read_in_progress = FALSE;
1041
1042                 /* start interrupt read for this edgeport
1043                  * this interrupt will continue as long as the edgeport is connected */
1044                 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
1045                 if (response) {
1046                         dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
1047                 }
1048         }
1049
1050         /* initialize our wait queues */
1051         init_waitqueue_head(&edge_port->wait_open);
1052         init_waitqueue_head(&edge_port->wait_chase);
1053         init_waitqueue_head(&edge_port->delta_msr_wait);
1054         init_waitqueue_head(&edge_port->wait_command);
1055
1056         /* initialize our icount structure */
1057         memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1058
1059         /* initialize our port settings */
1060         edge_port->txCredits            = 0;                    /* Can't send any data yet */
1061         edge_port->shadowMCR            = MCR_MASTER_IE;        /* Must always set this bit to enable ints! */
1062         edge_port->chaseResponsePending = FALSE;
1063
1064         /* send a open port command */
1065         edge_port->openPending = TRUE;
1066         edge_port->open        = FALSE;
1067         response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
1068
1069         if (response < 0) {
1070                 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
1071                 edge_port->openPending = FALSE;
1072                 return -ENODEV;
1073         }
1074
1075         /* now wait for the port to be completely opened */
1076         timeout = OPEN_TIMEOUT;
1077         while (timeout && edge_port->openPending == TRUE) {
1078                 timeout = interruptible_sleep_on_timeout (&edge_port->wait_open, timeout);
1079         }
1080
1081         if (edge_port->open == FALSE) {
1082                 /* open timed out */
1083                 dbg("%s - open timedout", __FUNCTION__);
1084                 edge_port->openPending = FALSE;
1085                 return -ENODEV;
1086         }
1087
1088         /* create the txfifo */
1089         edge_port->txfifo.head  = 0;
1090         edge_port->txfifo.tail  = 0;
1091         edge_port->txfifo.count = 0;
1092         edge_port->txfifo.size  = edge_port->maxTxCredits;
1093         edge_port->txfifo.fifo  = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
1094
1095         if (!edge_port->txfifo.fifo) {
1096                 dbg("%s - no memory", __FUNCTION__);
1097                 edge_close (port, filp);
1098                 return -ENOMEM;
1099         }
1100
1101         /* Allocate a URB for the write */
1102         edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
1103         edge_port->write_in_progress = FALSE;
1104
1105         if (!edge_port->write_urb) {
1106                 dbg("%s - no memory", __FUNCTION__);
1107                 edge_close (port, filp);
1108                 return -ENOMEM;
1109         }
1110
1111         dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
1112
1113         dbg("%s exited", __FUNCTION__);
1114
1115         return 0;
1116 }
1117
1118
1119 /************************************************************************
1120  *
1121  * block_until_chase_response
1122  *
1123  *      This function will block the close until one of the following:
1124  *              1. Response to our Chase comes from Edgeport
1125  *              2. A timout of 10 seconds without activity has expired
1126  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
1127  *
1128  ************************************************************************/
1129 static void block_until_chase_response(struct edgeport_port *edge_port)
1130 {
1131         __u16 lastCredits;
1132         int timeout = 1*HZ;
1133         int wait = 10;
1134
1135         while (1) {
1136                 // Save Last credits
1137                 lastCredits = edge_port->txCredits;
1138
1139                 // Did we get our Chase response
1140                 if (edge_port->chaseResponsePending == FALSE) {
1141                         dbg("%s - Got Chase Response", __FUNCTION__);
1142
1143                         // did we get all of our credit back?
1144                         if (edge_port->txCredits == edge_port->maxTxCredits ) {
1145                                 dbg("%s - Got all credits", __FUNCTION__);
1146                                 return;
1147                         }
1148                 }
1149
1150                 // Block the thread for a while
1151                 interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
1152
1153                 if (lastCredits == edge_port->txCredits) {
1154                         // No activity.. count down.
1155                         wait--;
1156                         if (wait == 0) {
1157                                 edge_port->chaseResponsePending = FALSE;
1158                                 dbg("%s - Chase TIMEOUT", __FUNCTION__);
1159                                 return;
1160                         }
1161                 } else {
1162                         // Reset timout value back to 10 seconds
1163                         dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
1164                         wait = 10;
1165                 }
1166         }
1167 }
1168
1169
1170 /************************************************************************
1171  *
1172  * block_until_tx_empty
1173  *
1174  *      This function will block the close until one of the following:
1175  *              1. TX count are 0
1176  *              2. The edgeport has stopped
1177  *              3. A timout of 3 seconds without activity has expired
1178  *
1179  ************************************************************************/
1180 static void block_until_tx_empty (struct edgeport_port *edge_port)
1181 {
1182         struct TxFifo *fifo = &edge_port->txfifo;
1183         __u32 lastCount;
1184         int timeout = HZ/10;
1185         int wait = 30;
1186
1187         while (1) {
1188                 // Save Last count
1189                 lastCount = fifo->count;
1190
1191                 // Is the Edgeport Buffer empty?
1192                 if (lastCount == 0) {
1193                         dbg("%s - TX Buffer Empty", __FUNCTION__);
1194                         return;
1195                 }
1196
1197                 // Block the thread for a while
1198                 interruptible_sleep_on_timeout (&edge_port->wait_chase, timeout);
1199
1200                 dbg("%s wait", __FUNCTION__);
1201
1202                 if (lastCount == fifo->count) {
1203                         // No activity.. count down.
1204                         wait--;
1205                         if (wait == 0) {
1206                                 dbg("%s - TIMEOUT", __FUNCTION__);
1207                                 return;
1208                         }
1209                 } else {
1210                         // Reset timout value back to seconds
1211                         wait = 30;
1212                 }
1213         }
1214 }
1215
1216
1217 /*****************************************************************************
1218  * edge_close
1219  *      this function is called by the tty driver when a port is closed
1220  *****************************************************************************/
1221 static void edge_close (struct usb_serial_port *port, struct file * filp)
1222 {
1223         struct edgeport_serial *edge_serial;
1224         struct edgeport_port *edge_port;
1225         int status;
1226
1227         dbg("%s - port %d", __FUNCTION__, port->number);
1228
1229         edge_serial = usb_get_serial_data(port->serial);
1230         edge_port = usb_get_serial_port_data(port);
1231         if ((edge_serial == NULL) || (edge_port == NULL))
1232                 return;
1233
1234         // block until tx is empty
1235         block_until_tx_empty(edge_port);
1236
1237         edge_port->closePending = TRUE;
1238
1239         /* flush and chase */
1240         edge_port->chaseResponsePending = TRUE;
1241
1242         dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1243         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1244         if (status == 0) {
1245                 // block until chase finished
1246                 block_until_chase_response(edge_port);
1247         } else {
1248                 edge_port->chaseResponsePending = FALSE;
1249         }
1250
1251         /* close the port */
1252         dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1253         send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1254
1255         //port->close = TRUE;
1256         edge_port->closePending = FALSE;
1257         edge_port->open = FALSE;
1258         edge_port->openPending = FALSE;
1259
1260         if (edge_port->write_urb) {
1261                 usb_kill_urb(edge_port->write_urb);
1262         }
1263
1264         if (edge_port->write_urb) {
1265                 /* if this urb had a transfer buffer already (old transfer) free it */
1266                 if (edge_port->write_urb->transfer_buffer != NULL) {
1267                         kfree(edge_port->write_urb->transfer_buffer);
1268                 }
1269                 usb_free_urb   (edge_port->write_urb);
1270                 edge_port->write_urb = NULL;
1271         }
1272         if (edge_port->txfifo.fifo) {
1273                 kfree(edge_port->txfifo.fifo);
1274                 edge_port->txfifo.fifo = NULL;
1275         }
1276
1277         dbg("%s exited", __FUNCTION__);
1278 }
1279
1280 /*****************************************************************************
1281  * SerialWrite
1282  *      this function is called by the tty driver when data should be written to
1283  *      the port.
1284  *      If successful, we return the number of bytes written, otherwise we return
1285  *      a negative error number.
1286  *****************************************************************************/
1287 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1288 {
1289         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1290         struct TxFifo *fifo;
1291         int copySize;
1292         int bytesleft;
1293         int firsthalf;
1294         int secondhalf;
1295         unsigned long flags;
1296
1297         dbg("%s - port %d", __FUNCTION__, port->number);
1298
1299         if (edge_port == NULL)
1300                 return -ENODEV;
1301
1302         // get a pointer to the Tx fifo
1303         fifo = &edge_port->txfifo;
1304
1305         spin_lock_irqsave(&edge_port->ep_lock, flags);
1306
1307         // calculate number of bytes to put in fifo
1308         copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1309
1310         dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes", __FUNCTION__,
1311             port->number, count, edge_port->txCredits - fifo->count, copySize);
1312
1313         /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1314         if (copySize == 0) {
1315                 dbg("%s - copySize = Zero", __FUNCTION__);
1316                 goto finish_write;
1317         }
1318
1319         // queue the data
1320         // since we can never overflow the buffer we do not have to check for full condition
1321
1322         // the copy is done is two parts -- first fill to the end of the buffer
1323         // then copy the reset from the start of the buffer
1324
1325         bytesleft = fifo->size - fifo->head;
1326         firsthalf = min (bytesleft, copySize);
1327         dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1328
1329         /* now copy our data */
1330         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1331         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]);
1332
1333         // update the index and size
1334         fifo->head  += firsthalf;
1335         fifo->count += firsthalf;
1336
1337         // wrap the index
1338         if (fifo->head == fifo->size) {
1339                 fifo->head = 0;
1340         }
1341
1342         secondhalf = copySize-firsthalf;
1343
1344         if (secondhalf) {
1345                 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1346                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1347                 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1348                 // update the index and size
1349                 fifo->count += secondhalf;
1350                 fifo->head  += secondhalf;
1351                 // No need to check for wrap since we can not get to end of fifo in this part
1352         }
1353
1354 finish_write:
1355         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1356
1357         send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1358
1359         dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1360
1361         return copySize;
1362 }
1363
1364
1365 /************************************************************************
1366  *
1367  * send_more_port_data()
1368  *
1369  *      This routine attempts to write additional UART transmit data
1370  *      to a port over the USB bulk pipe. It is called (1) when new
1371  *      data has been written to a port's TxBuffer from higher layers
1372  *      (2) when the peripheral sends us additional TxCredits indicating
1373  *      that it can accept more Tx data for a given port; and (3) when
1374  *      a bulk write completes successfully and we want to see if we
1375  *      can transmit more.
1376  *
1377  ************************************************************************/
1378 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1379 {
1380         struct TxFifo   *fifo = &edge_port->txfifo;
1381         struct urb      *urb;
1382         unsigned char   *buffer;
1383         int             status;
1384         int             count;
1385         int             bytesleft;
1386         int             firsthalf;
1387         int             secondhalf;
1388         unsigned long   flags;
1389
1390         dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1391
1392         spin_lock_irqsave(&edge_port->ep_lock, flags);
1393
1394         if (edge_port->write_in_progress ||
1395             !edge_port->open             ||
1396             (fifo->count == 0)) {
1397                 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1398                 goto exit_send;
1399         }
1400
1401         // since the amount of data in the fifo will always fit into the
1402         // edgeport buffer we do not need to check the write length
1403
1404         //      Do we have enough credits for this port to make it worthwhile
1405         //      to bother queueing a write. If it's too small, say a few bytes,
1406         //      it's better to wait for more credits so we can do a larger
1407         //      write.
1408         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1409                 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1410                 goto exit_send;
1411         }
1412
1413         // lock this write
1414         edge_port->write_in_progress = TRUE;
1415
1416         // get a pointer to the write_urb
1417         urb = edge_port->write_urb;
1418
1419         /* if this urb had a transfer buffer already (old transfer) free it */
1420         if (urb->transfer_buffer != NULL) {
1421                 kfree(urb->transfer_buffer);
1422                 urb->transfer_buffer = NULL;
1423         }
1424
1425         /* build the data header for the buffer and port that we are about to send out */
1426         count = fifo->count;
1427         buffer = kmalloc (count+2, GFP_ATOMIC);
1428         if (buffer == NULL) {
1429                 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1430                 edge_port->write_in_progress = FALSE;
1431                 goto exit_send;
1432         }
1433         buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1434         buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1435
1436         /* now copy our data */
1437         bytesleft =  fifo->size - fifo->tail;
1438         firsthalf = min (bytesleft, count);
1439         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1440         fifo->tail  += firsthalf;
1441         fifo->count -= firsthalf;
1442         if (fifo->tail == fifo->size) {
1443                 fifo->tail = 0;
1444         }
1445
1446         secondhalf = count-firsthalf;
1447         if (secondhalf) {
1448                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1449                 fifo->tail  += secondhalf;
1450                 fifo->count -= secondhalf;
1451         }
1452
1453         if (count)
1454                 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1455
1456         /* fill up the urb with all of our data and submit it */
1457         usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1458                        usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1459                        buffer, count+2, edge_bulk_out_data_callback, edge_port);
1460
1461         /* decrement the number of credits we have by the number we just sent */
1462         edge_port->txCredits -= count;
1463         edge_port->icount.tx += count;
1464
1465         urb->dev = edge_serial->serial->dev;
1466         status = usb_submit_urb(urb, GFP_ATOMIC);
1467         if (status) {
1468                 /* something went wrong */
1469                 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1470                 edge_port->write_in_progress = FALSE;
1471
1472                 /* revert the credits as something bad happened. */
1473                 edge_port->txCredits += count;
1474                 edge_port->icount.tx -= count;
1475         }
1476         dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1477
1478 exit_send:
1479         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1480 }
1481
1482
1483 /*****************************************************************************
1484  * edge_write_room
1485  *      this function is called by the tty driver when it wants to know how many
1486  *      bytes of data we can accept for a specific port.
1487  *      If successful, we return the amount of room that we have for this port
1488  *      (the txCredits),
1489  *      Otherwise we return a negative error number.
1490  *****************************************************************************/
1491 static int edge_write_room (struct usb_serial_port *port)
1492 {
1493         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1494         int room;
1495         unsigned long flags;
1496
1497         dbg("%s", __FUNCTION__);
1498
1499         if (edge_port == NULL)
1500                 return -ENODEV;
1501         if (edge_port->closePending == TRUE)
1502                 return -ENODEV;
1503
1504         dbg("%s - port %d", __FUNCTION__, port->number);
1505
1506         if (!edge_port->open) {
1507                 dbg("%s - port not opened", __FUNCTION__);
1508                 return -EINVAL;
1509         }
1510
1511         // total of both buffers is still txCredit
1512         spin_lock_irqsave(&edge_port->ep_lock, flags);
1513         room = edge_port->txCredits - edge_port->txfifo.count;
1514         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1515
1516         dbg("%s - returns %d", __FUNCTION__, room);
1517         return room;
1518 }
1519
1520
1521 /*****************************************************************************
1522  * edge_chars_in_buffer
1523  *      this function is called by the tty driver when it wants to know how many
1524  *      bytes of data we currently have outstanding in the port (data that has
1525  *      been written, but hasn't made it out the port yet)
1526  *      If successful, we return the number of bytes left to be written in the
1527  *      system,
1528  *      Otherwise we return a negative error number.
1529  *****************************************************************************/
1530 static int edge_chars_in_buffer (struct usb_serial_port *port)
1531 {
1532         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1533         int num_chars;
1534         unsigned long flags;
1535
1536         dbg("%s", __FUNCTION__);
1537
1538         if (edge_port == NULL)
1539                 return -ENODEV;
1540         if (edge_port->closePending == TRUE)
1541                 return -ENODEV;
1542
1543         if (!edge_port->open) {
1544                 dbg("%s - port not opened", __FUNCTION__);
1545                 return -EINVAL;
1546         }
1547
1548         spin_lock_irqsave(&edge_port->ep_lock, flags);
1549         num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1550         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1551         if (num_chars) {
1552                 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1553         }
1554
1555         return num_chars;
1556 }
1557
1558
1559 /*****************************************************************************
1560  * SerialThrottle
1561  *      this function is called by the tty driver when it wants to stop the data
1562  *      being read from the port.
1563  *****************************************************************************/
1564 static void edge_throttle (struct usb_serial_port *port)
1565 {
1566         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1567         struct tty_struct *tty;
1568         int status;
1569
1570         dbg("%s - port %d", __FUNCTION__, port->number);
1571
1572         if (edge_port == NULL)
1573                 return;
1574
1575         if (!edge_port->open) {
1576                 dbg("%s - port not opened", __FUNCTION__);
1577                 return;
1578         }
1579
1580         tty = port->tty;
1581         if (!tty) {
1582                 dbg ("%s - no tty available", __FUNCTION__);
1583                 return;
1584         }
1585
1586         /* if we are implementing XON/XOFF, send the stop character */
1587         if (I_IXOFF(tty)) {
1588                 unsigned char stop_char = STOP_CHAR(tty);
1589                 status = edge_write (port, &stop_char, 1);
1590                 if (status <= 0) {
1591                         return;
1592                 }
1593         }
1594
1595         /* if we are implementing RTS/CTS, toggle that line */
1596         if (tty->termios->c_cflag & CRTSCTS) {
1597                 edge_port->shadowMCR &= ~MCR_RTS;
1598                 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1599                 if (status != 0) {
1600                         return;
1601                 }
1602         }
1603
1604         return;
1605 }
1606
1607
1608 /*****************************************************************************
1609  * edge_unthrottle
1610  *      this function is called by the tty driver when it wants to resume the data
1611  *      being read from the port (called after SerialThrottle is called)
1612  *****************************************************************************/
1613 static void edge_unthrottle (struct usb_serial_port *port)
1614 {
1615         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1616         struct tty_struct *tty;
1617         int status;
1618
1619         dbg("%s - port %d", __FUNCTION__, port->number);
1620
1621         if (edge_port == NULL)
1622                 return;
1623
1624         if (!edge_port->open) {
1625                 dbg("%s - port not opened", __FUNCTION__);
1626                 return;
1627         }
1628
1629         tty = port->tty;
1630         if (!tty) {
1631                 dbg ("%s - no tty available", __FUNCTION__);
1632                 return;
1633         }
1634
1635         /* if we are implementing XON/XOFF, send the start character */
1636         if (I_IXOFF(tty)) {
1637                 unsigned char start_char = START_CHAR(tty);
1638                 status = edge_write (port, &start_char, 1);
1639                 if (status <= 0) {
1640                         return;
1641                 }
1642         }
1643
1644         /* if we are implementing RTS/CTS, toggle that line */
1645         if (tty->termios->c_cflag & CRTSCTS) {
1646                 edge_port->shadowMCR |= MCR_RTS;
1647                 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1648                 if (status != 0) {
1649                         return;
1650                 }
1651         }
1652
1653         return;
1654 }
1655
1656
1657 /*****************************************************************************
1658  * SerialSetTermios
1659  *      this function is called by the tty driver when it wants to change the termios structure
1660  *****************************************************************************/
1661 static void edge_set_termios (struct usb_serial_port *port, struct termios *old_termios)
1662 {
1663         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1664         struct tty_struct *tty = port->tty;
1665         unsigned int cflag;
1666
1667         if (!port->tty || !port->tty->termios) {
1668                 dbg ("%s - no tty or termios", __FUNCTION__);
1669                 return;
1670         }
1671
1672         cflag = tty->termios->c_cflag;
1673         /* check that they really want us to change something */
1674         if (old_termios) {
1675                 if (cflag == old_termios->c_cflag &&
1676                     tty->termios->c_iflag == old_termios->c_iflag) {
1677                         dbg("%s - nothing to change", __FUNCTION__);
1678                         return;
1679                 }
1680         }
1681
1682         dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1683             tty->termios->c_cflag, tty->termios->c_iflag);
1684         if (old_termios) {
1685                 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1686                     old_termios->c_cflag, old_termios->c_iflag);
1687         }
1688
1689         dbg("%s - port %d", __FUNCTION__, port->number);
1690
1691         if (edge_port == NULL)
1692                 return;
1693
1694         if (!edge_port->open) {
1695                 dbg("%s - port not opened", __FUNCTION__);
1696                 return;
1697         }
1698
1699         /* change the port settings to the new ones specified */
1700         change_port_settings (edge_port, old_termios);
1701
1702         return;
1703 }
1704
1705
1706 /*****************************************************************************
1707  * get_lsr_info - get line status register info
1708  *
1709  * Purpose: Let user call ioctl() to get info when the UART physically
1710  *          is emptied.  On bus types like RS485, the transmitter must
1711  *          release the bus after transmitting. This must be done when
1712  *          the transmit shift register is empty, not be done when the
1713  *          transmit holding register is empty.  This functionality
1714  *          allows an RS485 driver to be written in user space.
1715  *****************************************************************************/
1716 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1717 {
1718         unsigned int result = 0;
1719         unsigned long flags;
1720
1721         spin_lock_irqsave(&edge_port->ep_lock, flags);
1722         if (edge_port->maxTxCredits == edge_port->txCredits &&
1723             edge_port->txfifo.count == 0) {
1724                 dbg("%s -- Empty", __FUNCTION__);
1725                 result = TIOCSER_TEMT;
1726         }
1727         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1728
1729         if (copy_to_user(value, &result, sizeof(int)))
1730                 return -EFAULT;
1731         return 0;
1732 }
1733
1734 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1735 {
1736         unsigned int result = 0;
1737         struct tty_struct *tty = edge_port->port->tty;
1738
1739         if (!tty)
1740                 return -ENOIOCTLCMD;
1741
1742         result = tty->read_cnt;
1743
1744         dbg("%s(%d) = %d", __FUNCTION__,  edge_port->port->number, result);
1745         if (copy_to_user(value, &result, sizeof(int)))
1746                 return -EFAULT;
1747         //return 0;
1748         return -ENOIOCTLCMD;
1749 }
1750
1751 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1752 {
1753         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1754         unsigned int mcr;
1755
1756         dbg("%s - port %d", __FUNCTION__, port->number);
1757
1758         mcr = edge_port->shadowMCR;
1759         if (set & TIOCM_RTS)
1760                 mcr |= MCR_RTS;
1761         if (set & TIOCM_DTR)
1762                 mcr |= MCR_DTR;
1763         if (set & TIOCM_LOOP)
1764                 mcr |= MCR_LOOPBACK;
1765
1766         if (clear & TIOCM_RTS)
1767                 mcr &= ~MCR_RTS;
1768         if (clear & TIOCM_DTR)
1769                 mcr &= ~MCR_DTR;
1770         if (clear & TIOCM_LOOP)
1771                 mcr &= ~MCR_LOOPBACK;
1772
1773         edge_port->shadowMCR = mcr;
1774
1775         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1776
1777         return 0;
1778 }
1779
1780 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1781 {
1782         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1783         unsigned int result = 0;
1784         unsigned int msr;
1785         unsigned int mcr;
1786
1787         dbg("%s - port %d", __FUNCTION__, port->number);
1788
1789         msr = edge_port->shadowMSR;
1790         mcr = edge_port->shadowMCR;
1791         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1792                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1793                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1794                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1795                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1796                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1797
1798
1799         dbg("%s -- %x", __FUNCTION__, result);
1800
1801         return result;
1802 }
1803
1804 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1805 {
1806         struct serial_struct tmp;
1807
1808         if (!retinfo)
1809                 return -EFAULT;
1810
1811         memset(&tmp, 0, sizeof(tmp));
1812
1813         tmp.type                = PORT_16550A;
1814         tmp.line                = edge_port->port->serial->minor;
1815         tmp.port                = edge_port->port->number;
1816         tmp.irq                 = 0;
1817         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1818         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1819         tmp.baud_base           = 9600;
1820         tmp.close_delay         = 5*HZ;
1821         tmp.closing_wait        = 30*HZ;
1822 //      tmp.custom_divisor      = state->custom_divisor;
1823 //      tmp.hub6                = state->hub6;
1824 //      tmp.io_type             = state->io_type;
1825
1826         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1827                 return -EFAULT;
1828         return 0;
1829 }
1830
1831
1832
1833 /*****************************************************************************
1834  * SerialIoctl
1835  *      this function handles any ioctl calls to the driver
1836  *****************************************************************************/
1837 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1838 {
1839         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1840         struct async_icount cnow;
1841         struct async_icount cprev;
1842         struct serial_icounter_struct icount;
1843
1844
1845         dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1846
1847         switch (cmd) {
1848                 // return number of bytes available
1849                 case TIOCINQ:
1850                         dbg("%s (%d) TIOCINQ", __FUNCTION__,  port->number);
1851                         return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1852                         break;
1853
1854                 case TIOCSERGETLSR:
1855                         dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__,  port->number);
1856                         return get_lsr_info(edge_port, (unsigned int __user *) arg);
1857                         return 0;
1858
1859                 case TIOCGSERIAL:
1860                         dbg("%s (%d) TIOCGSERIAL", __FUNCTION__,  port->number);
1861                         return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1862
1863                 case TIOCSSERIAL:
1864                         dbg("%s (%d) TIOCSSERIAL", __FUNCTION__,  port->number);
1865                         break;
1866
1867                 case TIOCMIWAIT:
1868                         dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
1869                         cprev = edge_port->icount;
1870                         while (1) {
1871                                 interruptible_sleep_on(&edge_port->delta_msr_wait);
1872                                 /* see if a signal did it */
1873                                 if (signal_pending(current))
1874                                         return -ERESTARTSYS;
1875                                 cnow = edge_port->icount;
1876                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1877                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1878                                         return -EIO; /* no change => error */
1879                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1880                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1881                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1882                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1883                                         return 0;
1884                                 }
1885                                 cprev = cnow;
1886                         }
1887                         /* NOTREACHED */
1888                         break;
1889
1890                 case TIOCGICOUNT:
1891                         cnow = edge_port->icount;
1892                         memset(&icount, 0, sizeof(icount));
1893                         icount.cts = cnow.cts;
1894                         icount.dsr = cnow.dsr;
1895                         icount.rng = cnow.rng;
1896                         icount.dcd = cnow.dcd;
1897                         icount.rx = cnow.rx;
1898                         icount.tx = cnow.tx;
1899                         icount.frame = cnow.frame;
1900                         icount.overrun = cnow.overrun;
1901                         icount.parity = cnow.parity;
1902                         icount.brk = cnow.brk;
1903                         icount.buf_overrun = cnow.buf_overrun;
1904
1905                         dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,  port->number, icount.rx, icount.tx );
1906                         if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1907                                 return -EFAULT;
1908                         return 0;
1909         }
1910
1911         return -ENOIOCTLCMD;
1912 }
1913
1914
1915 /*****************************************************************************
1916  * SerialBreak
1917  *      this function sends a break to the port
1918  *****************************************************************************/
1919 static void edge_break (struct usb_serial_port *port, int break_state)
1920 {
1921         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1922         int status;
1923
1924         /* flush and chase */
1925         edge_port->chaseResponsePending = TRUE;
1926
1927         dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1928         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1929         if (status == 0) {
1930                 // block until chase finished
1931                 block_until_chase_response(edge_port);
1932         } else {
1933                 edge_port->chaseResponsePending = FALSE;
1934         }
1935
1936         if (break_state == -1) {
1937                 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1938                 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1939         } else {
1940                 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1941                 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1942         }
1943         if (status) {
1944                 dbg("%s - error sending break set/clear command.", __FUNCTION__);
1945         }
1946
1947         return;
1948 }
1949
1950
1951 /*****************************************************************************
1952  * process_rcvd_data
1953  *      this function handles the data received on the bulk in pipe.
1954  *****************************************************************************/
1955 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1956 {
1957         struct usb_serial_port *port;
1958         struct edgeport_port *edge_port;
1959         struct tty_struct *tty;
1960         __u16 lastBufferLength;
1961         __u16 rxLen;
1962
1963         dbg("%s", __FUNCTION__);
1964
1965         lastBufferLength = bufferLength + 1;
1966
1967         while (bufferLength > 0) {
1968                 /* failsafe incase we get a message that we don't understand */
1969                 if (lastBufferLength == bufferLength) {
1970                         dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1971                         break;
1972                 }
1973                 lastBufferLength = bufferLength;
1974
1975                 switch (edge_serial->rxState) {
1976                         case EXPECT_HDR1:
1977                                 edge_serial->rxHeader1 = *buffer;
1978                                 ++buffer;
1979                                 --bufferLength;
1980
1981                                 if (bufferLength == 0) {
1982                                         edge_serial->rxState = EXPECT_HDR2;
1983                                         break;
1984                                 }
1985                                 /* otherwise, drop on through */
1986
1987                         case EXPECT_HDR2:
1988                                 edge_serial->rxHeader2 = *buffer;
1989                                 ++buffer;
1990                                 --bufferLength;
1991
1992                                 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1993
1994                                 // Process depending on whether this header is
1995                                 // data or status
1996
1997                                 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1998                                         // Decode this status header and goto EXPECT_HDR1 (if we
1999                                         // can process the status with only 2 bytes), or goto
2000                                         // EXPECT_HDR3 to get the third byte.
2001
2002                                         edge_serial->rxPort       = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2003                                         edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
2004
2005                                         if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
2006                                                 // This status needs additional bytes. Save what we have
2007                                                 // and then wait for more data.
2008                                                 edge_serial->rxStatusParam = edge_serial->rxHeader2;
2009
2010                                                 edge_serial->rxState = EXPECT_HDR3;
2011                                                 break;
2012                                         }
2013
2014                                         // We have all the header bytes, process the status now
2015                                         process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
2016                                         edge_serial->rxState = EXPECT_HDR1;
2017                                         break;
2018                                 } else {
2019                                         edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
2020                                         edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
2021
2022                                         dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
2023
2024                                         //ASSERT( DevExt->RxPort < DevExt->NumPorts );
2025                                         //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
2026
2027                                         if (bufferLength == 0 ) {
2028                                                 edge_serial->rxState = EXPECT_DATA;
2029                                                 break;
2030                                         }
2031                                         // Else, drop through
2032                                 }
2033
2034                         case EXPECT_DATA:       // Expect data
2035
2036                                 if (bufferLength < edge_serial->rxBytesRemaining) {
2037                                         rxLen = bufferLength;
2038                                         edge_serial->rxState = EXPECT_DATA;     // Expect data to start next buffer
2039                                 } else {
2040                                         // BufLen >= RxBytesRemaining
2041                                         rxLen = edge_serial->rxBytesRemaining;
2042                                         edge_serial->rxState = EXPECT_HDR1;     // Start another header next time
2043                                 }
2044
2045                                 bufferLength -= rxLen;
2046                                 edge_serial->rxBytesRemaining -= rxLen;
2047
2048                                 /* spit this data back into the tty driver if this port is open */
2049                                 if (rxLen) {
2050                                         port = edge_serial->serial->port[edge_serial->rxPort];
2051                                         edge_port = usb_get_serial_port_data(port);
2052                                         if (edge_port->open) {
2053                                                 tty = edge_port->port->tty;
2054                                                 if (tty) {
2055                                                         dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
2056                                                         edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
2057                                                 }
2058                                                 edge_port->icount.rx += rxLen;
2059                                         }
2060                                         buffer += rxLen;
2061                                 }
2062
2063                                 break;
2064
2065                         case EXPECT_HDR3:                       // Expect 3rd byte of status header
2066                                 edge_serial->rxHeader3 = *buffer;
2067                                 ++buffer;
2068                                 --bufferLength;
2069
2070                                 // We have all the header bytes, process the status now
2071                                 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
2072                                 edge_serial->rxState = EXPECT_HDR1;
2073                                 break;
2074
2075                 }
2076         }
2077 }
2078
2079
2080 /*****************************************************************************
2081  * process_rcvd_status
2082  *      this function handles the any status messages received on the bulk in pipe.
2083  *****************************************************************************/
2084 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
2085 {
2086         struct usb_serial_port *port;
2087         struct edgeport_port *edge_port;
2088         __u8 code = edge_serial->rxStatusCode;
2089
2090         /* switch the port pointer to the one being currently talked about */
2091         port = edge_serial->serial->port[edge_serial->rxPort];
2092         edge_port = usb_get_serial_port_data(port);
2093         if (edge_port == NULL) {
2094                 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
2095                 return;
2096         }
2097
2098         dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
2099
2100         if (code == IOSP_EXT_STATUS) {
2101                 switch (byte2) {
2102                         case IOSP_EXT_STATUS_CHASE_RSP:
2103                                 // we want to do EXT status regardless of port open/closed
2104                                 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
2105                                 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
2106                                 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
2107                                 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
2108                                 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
2109                                 // like wait longer in block_until_chase_response, but for now we don't.
2110                                 edge_port->chaseResponsePending = FALSE;
2111                                 wake_up_interruptible (&edge_port->wait_chase);
2112                                 return;
2113
2114                         case IOSP_EXT_STATUS_RX_CHECK_RSP:
2115                                 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
2116                                 //Port->RxCheckRsp = TRUE;
2117                                 return;
2118                 }
2119         }
2120
2121         if (code == IOSP_STATUS_OPEN_RSP) {
2122                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
2123                 edge_port->maxTxCredits = edge_port->txCredits;
2124                 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
2125                 handle_new_msr (edge_port, byte2);
2126
2127                 /* send the current line settings to the port so we are in sync with any further termios calls */
2128                 if (edge_port->port->tty)
2129                         change_port_settings (edge_port, edge_port->port->tty->termios);
2130
2131                 /* we have completed the open */
2132                 edge_port->openPending = FALSE;
2133                 edge_port->open = TRUE;
2134                 wake_up_interruptible(&edge_port->wait_open);
2135                 return;
2136         }
2137
2138         // If port is closed, silently discard all rcvd status. We can
2139         // have cases where buffered status is received AFTER the close
2140         // port command is sent to the Edgeport.
2141         if ((!edge_port->open ) || (edge_port->closePending)) {
2142                 return;
2143         }
2144
2145         switch (code) {
2146                 // Not currently sent by Edgeport
2147                 case IOSP_STATUS_LSR:
2148                         dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2149                         handle_new_lsr (edge_port, FALSE, byte2, 0);
2150                         break;
2151
2152                 case IOSP_STATUS_LSR_DATA:
2153                         dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2154                         // byte2 is LSR Register
2155                         // byte3 is broken data byte
2156                         handle_new_lsr (edge_port, TRUE, byte2, byte3);
2157                         break;
2158                         //
2159                         //      case IOSP_EXT_4_STATUS:
2160                         //              dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
2161                         //              break;
2162                         //
2163                 case IOSP_STATUS_MSR:
2164                         dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
2165
2166                         // Process this new modem status and generate appropriate
2167                         // events, etc, based on the new status. This routine
2168                         // also saves the MSR in Port->ShadowMsr.
2169                         handle_new_msr(edge_port, byte2);
2170                         break;
2171
2172                 default:
2173                         dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
2174                         break;
2175         }
2176
2177         return;
2178 }
2179
2180
2181 /*****************************************************************************
2182  * edge_tty_recv
2183  *      this function passes data on to the tty flip buffer
2184  *****************************************************************************/
2185 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
2186 {
2187         int cnt;
2188
2189         do {
2190                 if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2191                         tty_flip_buffer_push(tty);
2192                         if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
2193                                 dev_err(dev, "%s - dropping data, %d bytes lost\n",
2194                                         __FUNCTION__, length);
2195                                 return;
2196                         }
2197                 }
2198                 cnt = min(length, TTY_FLIPBUF_SIZE - tty->flip.count);
2199                 memcpy(tty->flip.char_buf_ptr, data, cnt);
2200                 memset(tty->flip.flag_buf_ptr, 0, cnt);
2201                 tty->flip.char_buf_ptr += cnt;
2202                 tty->flip.flag_buf_ptr += cnt;
2203                 tty->flip.count += cnt;
2204                 data += cnt;
2205                 length -= cnt;
2206         } while (length > 0);
2207
2208         tty_flip_buffer_push(tty);
2209 }
2210
2211
2212 /*****************************************************************************
2213  * handle_new_msr
2214  *      this function handles any change to the msr register for a port.
2215  *****************************************************************************/
2216 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
2217 {
2218         struct  async_icount *icount;
2219
2220         dbg("%s %02x", __FUNCTION__, newMsr);
2221
2222         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
2223                 icount = &edge_port->icount;
2224
2225                 /* update input line counters */
2226                 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
2227                         icount->cts++;
2228                 }
2229                 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
2230                         icount->dsr++;
2231                 }
2232                 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2233                         icount->dcd++;
2234                 }
2235                 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2236                         icount->rng++;
2237                 }
2238                 wake_up_interruptible(&edge_port->delta_msr_wait);
2239         }
2240
2241         /* Save the new modem status */
2242         edge_port->shadowMSR = newMsr & 0xf0;
2243
2244         return;
2245 }
2246
2247
2248 /*****************************************************************************
2249  * handle_new_lsr
2250  *      this function handles any change to the lsr register for a port.
2251  *****************************************************************************/
2252 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2253 {
2254         __u8    newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2255         struct  async_icount *icount;
2256
2257         dbg("%s - %02x", __FUNCTION__, newLsr);
2258
2259         edge_port->shadowLSR = lsr;
2260
2261         if (newLsr & LSR_BREAK) {
2262                 //
2263                 // Parity and Framing errors only count if they
2264                 // occur exclusive of a break being
2265                 // received.
2266                 //
2267                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2268         }
2269
2270         /* Place LSR data byte into Rx buffer */
2271         if (lsrData && edge_port->port->tty)
2272                 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2273
2274         /* update input line counters */
2275         icount = &edge_port->icount;
2276         if (newLsr & LSR_BREAK) {
2277                 icount->brk++;
2278         }
2279         if (newLsr & LSR_OVER_ERR) {
2280                 icount->overrun++;
2281         }
2282         if (newLsr & LSR_PAR_ERR) {
2283                 icount->parity++;
2284         }
2285         if (newLsr & LSR_FRM_ERR) {
2286                 icount->frame++;
2287         }
2288
2289         return;
2290 }
2291
2292
2293 /****************************************************************************
2294  * sram_write
2295  *      writes a number of bytes to the Edgeport device's sram starting at the
2296  *      given address.
2297  *      If successful returns the number of bytes written, otherwise it returns
2298  *      a negative error number of the problem.
2299  ****************************************************************************/
2300 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2301 {
2302         int result;
2303         __u16 current_length;
2304         unsigned char *transfer_buffer;
2305
2306         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2307
2308         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2309         if (!transfer_buffer) {
2310                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2311                 return -ENOMEM;
2312         }
2313
2314         /* need to split these writes up into 64 byte chunks */
2315         result = 0;
2316         while (length > 0) {
2317                 if (length > 64) {
2318                         current_length = 64;
2319                 } else {
2320                         current_length = length;
2321                 }
2322 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2323                 memcpy (transfer_buffer, data, current_length);
2324                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2325                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2326                 if (result < 0)
2327                         break;
2328                 length -= current_length;
2329                 addr += current_length;
2330                 data += current_length;
2331         }
2332
2333         kfree (transfer_buffer);
2334         return result;
2335 }
2336
2337
2338 /****************************************************************************
2339  * rom_write
2340  *      writes a number of bytes to the Edgeport device's ROM starting at the
2341  *      given address.
2342  *      If successful returns the number of bytes written, otherwise it returns
2343  *      a negative error number of the problem.
2344  ****************************************************************************/
2345 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2346 {
2347         int result;
2348         __u16 current_length;
2349         unsigned char *transfer_buffer;
2350
2351 //      dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2352
2353         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2354         if (!transfer_buffer) {
2355                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2356                 return -ENOMEM;
2357         }
2358
2359         /* need to split these writes up into 64 byte chunks */
2360         result = 0;
2361         while (length > 0) {
2362                 if (length > 64) {
2363                         current_length = 64;
2364                 } else {
2365                         current_length = length;
2366                 }
2367 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2368                 memcpy (transfer_buffer, data, current_length);
2369                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2370                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2371                 if (result < 0)
2372                         break;
2373                 length -= current_length;
2374                 addr += current_length;
2375                 data += current_length;
2376         }
2377
2378         kfree (transfer_buffer);
2379         return result;
2380 }
2381
2382
2383 /****************************************************************************
2384  * rom_read
2385  *      reads a number of bytes from the Edgeport device starting at the given
2386  *      address.
2387  *      If successful returns the number of bytes read, otherwise it returns
2388  *      a negative error number of the problem.
2389  ****************************************************************************/
2390 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2391 {
2392         int result;
2393         __u16 current_length;
2394         unsigned char *transfer_buffer;
2395
2396         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2397
2398         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2399         if (!transfer_buffer) {
2400                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2401                 return -ENOMEM;
2402         }
2403
2404         /* need to split these reads up into 64 byte chunks */
2405         result = 0;
2406         while (length > 0) {
2407                 if (length > 64) {
2408                         current_length = 64;
2409                 } else {
2410                         current_length = length;
2411                 }
2412 //              dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2413                 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2414                                           0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2415                 if (result < 0)
2416                         break;
2417                 memcpy (data, transfer_buffer, current_length);
2418                 length -= current_length;
2419                 addr += current_length;
2420                 data += current_length;
2421         }
2422
2423         kfree (transfer_buffer);
2424         return result;
2425 }
2426
2427
2428 /****************************************************************************
2429  * send_iosp_ext_cmd
2430  *      Is used to send a IOSP message to the Edgeport device
2431  ****************************************************************************/
2432 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2433 {
2434         unsigned char   *buffer;
2435         unsigned char   *currentCommand;
2436         int             length = 0;
2437         int             status = 0;
2438
2439         dbg("%s - %d, %d", __FUNCTION__, command, param);
2440
2441         buffer =  kmalloc (10, GFP_ATOMIC);
2442         if (!buffer) {
2443                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2444                 return -ENOMEM;
2445         }
2446
2447         currentCommand = buffer;
2448
2449         MAKE_CMD_EXT_CMD (&currentCommand, &length,
2450                           edge_port->port->number - edge_port->port->serial->minor,
2451                           command, param);
2452
2453         status = write_cmd_usb (edge_port, buffer, length);
2454         if (status) {
2455                 /* something bad happened, let's free up the memory */
2456                 kfree(buffer);
2457         }
2458
2459         return status;
2460 }
2461
2462
2463 /*****************************************************************************
2464  * write_cmd_usb
2465  *      this function writes the given buffer out to the bulk write endpoint.
2466  *****************************************************************************/
2467 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2468 {
2469         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2470         int status = 0;
2471         struct urb *urb;
2472         int timeout;
2473
2474         usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2475
2476         /* Allocate our next urb */
2477         urb = usb_alloc_urb (0, GFP_ATOMIC);
2478         if (!urb)
2479                 return -ENOMEM;
2480
2481         CmdUrbs++;
2482         dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
2483
2484         usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2485                        usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2486                        buffer, length, edge_bulk_out_cmd_callback, edge_port);
2487
2488         edge_port->commandPending = TRUE;
2489         status = usb_submit_urb(urb, GFP_ATOMIC);
2490
2491         if (status) {
2492                 /* something went wrong */
2493                 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2494                 usb_kill_urb(urb);
2495                 usb_free_urb(urb);
2496                 CmdUrbs--;
2497                 return status;
2498         }
2499
2500         // wait for command to finish
2501         timeout = COMMAND_TIMEOUT;
2502 #if 0
2503         while (timeout && edge_port->commandPending == TRUE) {
2504                 timeout = interruptible_sleep_on_timeout (&edge_port->wait_command, timeout);
2505         }
2506
2507         if (edge_port->commandPending == TRUE) {
2508                 /* command timed out */
2509                 dbg("%s - command timed out", __FUNCTION__);
2510                 status = -EINVAL;
2511         }
2512 #endif
2513         return status;
2514 }
2515
2516
2517 /*****************************************************************************
2518  * send_cmd_write_baud_rate
2519  *      this function sends the proper command to change the baud rate of the
2520  *      specified port.
2521  *****************************************************************************/
2522 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2523 {
2524         unsigned char *cmdBuffer;
2525         unsigned char *currCmd;
2526         int cmdLen = 0;
2527         int divisor;
2528         int status;
2529         unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2530
2531         dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2532
2533         status = calc_baud_rate_divisor (baudRate, &divisor);
2534         if (status) {
2535                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2536                 return status;
2537         }
2538
2539         // Alloc memory for the string of commands.
2540         cmdBuffer =  kmalloc (0x100, GFP_ATOMIC);
2541         if (!cmdBuffer) {
2542                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2543                 return -ENOMEM;
2544         }
2545         currCmd = cmdBuffer;
2546
2547         // Enable access to divisor latch
2548         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2549
2550         // Write the divisor itself
2551         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2552         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2553
2554         // Restore original value to disable access to divisor latch
2555         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2556
2557         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2558         if (status) {
2559                 /* something bad happened, let's free up the memory */
2560                 kfree (cmdBuffer);
2561         }
2562
2563         return status;
2564 }
2565
2566
2567 /*****************************************************************************
2568  * calc_baud_rate_divisor
2569  *      this function calculates the proper baud rate divisor for the specified
2570  *      baud rate.
2571  *****************************************************************************/
2572 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2573 {
2574         int i;
2575         __u16 custom;
2576
2577
2578         dbg("%s - %d", __FUNCTION__, baudrate);
2579
2580         for (i = 0; i < NUM_ENTRIES(divisor_table); i++) {
2581                 if ( divisor_table[i].BaudRate == baudrate ) {
2582                         *divisor = divisor_table[i].Divisor;
2583                         return 0;
2584                 }
2585         }
2586
2587         // We have tried all of the standard baud rates
2588         // lets try to calculate the divisor for this baud rate
2589         // Make sure the baud rate is reasonable
2590         if (baudrate > 50 && baudrate < 230400) {
2591                 // get divisor
2592                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2593
2594                 *divisor = custom;
2595
2596                 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2597                 return 0;
2598         }
2599
2600         return -1;
2601 }
2602
2603
2604 /*****************************************************************************
2605  * send_cmd_write_uart_register
2606  *      this function builds up a uart register message and sends to to the device.
2607  *****************************************************************************/
2608 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2609 {
2610         unsigned char *cmdBuffer;
2611         unsigned char *currCmd;
2612         unsigned long cmdLen = 0;
2613         int status;
2614
2615         dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2616
2617         // Alloc memory for the string of commands.
2618         cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2619         if (cmdBuffer == NULL ) {
2620                 return -ENOMEM;
2621         }
2622
2623         currCmd = cmdBuffer;
2624
2625         // Build a cmd in the buffer to write the given register
2626         MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2627                             edge_port->port->number - edge_port->port->serial->minor,
2628                             regNum, regValue);
2629
2630         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2631         if (status) {
2632                 /* something bad happened, let's free up the memory */
2633                 kfree (cmdBuffer);
2634         }
2635
2636         return status;
2637 }
2638
2639
2640 /*****************************************************************************
2641  * change_port_settings
2642  *      This routine is called to set the UART on the device to match the specified
2643  *      new settings.
2644  *****************************************************************************/
2645 #ifndef CMSPAR
2646 #define CMSPAR 0
2647 #endif
2648 static void change_port_settings (struct edgeport_port *edge_port, struct termios *old_termios)
2649 {
2650         struct tty_struct *tty;
2651         int baud;
2652         unsigned cflag;
2653         __u8 mask = 0xff;
2654         __u8 lData;
2655         __u8 lParity;
2656         __u8 lStop;
2657         __u8 rxFlow;
2658         __u8 txFlow;
2659         int status;
2660
2661         dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2662
2663         if ((!edge_port->open) &&
2664             (!edge_port->openPending)) {
2665                 dbg("%s - port not opened", __FUNCTION__);
2666                 return;
2667         }
2668
2669         tty = edge_port->port->tty;
2670         if ((!tty) ||
2671             (!tty->termios)) {
2672                 dbg("%s - no tty structures", __FUNCTION__);
2673                 return;
2674         }
2675
2676         cflag = tty->termios->c_cflag;
2677
2678         switch (cflag & CSIZE) {
2679                 case CS5:   lData = LCR_BITS_5; mask = 0x1f;    dbg("%s - data bits = 5", __FUNCTION__);   break;
2680                 case CS6:   lData = LCR_BITS_6; mask = 0x3f;    dbg("%s - data bits = 6", __FUNCTION__);   break;
2681                 case CS7:   lData = LCR_BITS_7; mask = 0x7f;    dbg("%s - data bits = 7", __FUNCTION__);   break;
2682                 default:
2683                 case CS8:   lData = LCR_BITS_8;                 dbg("%s - data bits = 8", __FUNCTION__);   break;
2684         }
2685
2686         lParity = LCR_PAR_NONE;
2687         if (cflag & PARENB) {
2688                 if (cflag & CMSPAR) {
2689                         if (cflag & PARODD) {
2690                                 lParity = LCR_PAR_MARK;
2691                                 dbg("%s - parity = mark", __FUNCTION__);
2692                         } else {
2693                                 lParity = LCR_PAR_SPACE;
2694                                 dbg("%s - parity = space", __FUNCTION__);
2695                         }
2696                 } else if (cflag & PARODD) {
2697                         lParity = LCR_PAR_ODD;
2698                         dbg("%s - parity = odd", __FUNCTION__);
2699                 } else {
2700                         lParity = LCR_PAR_EVEN;
2701                         dbg("%s - parity = even", __FUNCTION__);
2702                 }
2703         } else {
2704                 dbg("%s - parity = none", __FUNCTION__);
2705         }
2706
2707         if (cflag & CSTOPB) {
2708                 lStop = LCR_STOP_2;
2709                 dbg("%s - stop bits = 2", __FUNCTION__);
2710         } else {
2711                 lStop = LCR_STOP_1;
2712                 dbg("%s - stop bits = 1", __FUNCTION__);
2713         }
2714
2715         /* figure out the flow control settings */
2716         rxFlow = txFlow = 0x00;
2717         if (cflag & CRTSCTS) {
2718                 rxFlow |= IOSP_RX_FLOW_RTS;
2719                 txFlow |= IOSP_TX_FLOW_CTS;
2720                 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2721         } else {
2722                 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2723         }
2724
2725         /* if we are implementing XON/XOFF, set the start and stop character in the device */
2726         if (I_IXOFF(tty) || I_IXON(tty)) {
2727                 unsigned char stop_char  = STOP_CHAR(tty);
2728                 unsigned char start_char = START_CHAR(tty);
2729
2730                 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2731                 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2732
2733                 /* if we are implementing INBOUND XON/XOFF */
2734                 if (I_IXOFF(tty)) {
2735                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2736                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2737                 } else {
2738                         dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2739                 }
2740
2741                 /* if we are implementing OUTBOUND XON/XOFF */
2742                 if (I_IXON(tty)) {
2743                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2744                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2745                 } else {
2746                         dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2747                 }
2748         }
2749
2750         /* Set flow control to the configured value */
2751         send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2752         send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2753
2754
2755         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2756         edge_port->shadowLCR |= (lData | lParity | lStop);
2757
2758         edge_port->validDataMask = mask;
2759
2760         /* Send the updated LCR value to the EdgePort */
2761         status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2762         if (status != 0) {
2763                 return;
2764         }
2765
2766         /* set up the MCR register and send it to the EdgePort */
2767         edge_port->shadowMCR = MCR_MASTER_IE;
2768         if (cflag & CBAUD) {
2769                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2770         }
2771         status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2772         if (status != 0) {
2773                 return;
2774         }
2775
2776         /* Determine divisor based on baud rate */
2777         baud = tty_get_baud_rate(tty);
2778         if (!baud) {
2779                 /* pick a default, any default... */
2780                 baud = 9600;
2781         }
2782
2783         dbg("%s - baud rate = %d", __FUNCTION__, baud);
2784         status = send_cmd_write_baud_rate (edge_port, baud);
2785
2786         return;
2787 }
2788
2789
2790 /****************************************************************************
2791  * unicode_to_ascii
2792  *      Turns a string from Unicode into ASCII.
2793  *      Doesn't do a good job with any characters that are outside the normal
2794  *      ASCII range, but it's only for debugging...
2795  *      NOTE: expects the unicode in LE format
2796  ****************************************************************************/
2797 static void unicode_to_ascii (char *string, __le16 *unicode, int unicode_size)
2798 {
2799         int i;
2800
2801         if (unicode_size <= 0)
2802                 return;
2803
2804         for (i = 0; i < unicode_size; ++i)
2805                 string[i] = (char)(le16_to_cpu(unicode[i]));
2806         string[unicode_size] = 0x00;
2807 }
2808
2809
2810 /****************************************************************************
2811  * get_manufacturing_desc
2812  *      reads in the manufacturing descriptor and stores it into the serial
2813  *      structure.
2814  ****************************************************************************/
2815 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2816 {
2817         int response;
2818
2819         dbg("getting manufacturer descriptor");
2820
2821         response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2822                             (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2823                             (__u8 *)(&edge_serial->manuf_descriptor));
2824
2825         if (response < 1) {
2826                 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2827         } else {
2828                 char string[30];
2829                 dbg("**Manufacturer Descriptor");
2830                 dbg("  RomSize:        %dK", edge_serial->manuf_descriptor.RomSize);
2831                 dbg("  RamSize:        %dK", edge_serial->manuf_descriptor.RamSize);
2832                 dbg("  CpuRev:         %d", edge_serial->manuf_descriptor.CpuRev);
2833                 dbg("  BoardRev:       %d", edge_serial->manuf_descriptor.BoardRev);
2834                 dbg("  NumPorts:       %d", edge_serial->manuf_descriptor.NumPorts);
2835                 dbg("  DescDate:       %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2836                 unicode_to_ascii (string, edge_serial->manuf_descriptor.SerialNumber, edge_serial->manuf_descriptor.SerNumLength/2-1);
2837                 dbg("  SerialNumber: %s", string);
2838                 unicode_to_ascii (string, edge_serial->manuf_descriptor.AssemblyNumber, edge_serial->manuf_descriptor.AssemblyNumLength/2-1);
2839                 dbg("  AssemblyNumber: %s", string);
2840                 unicode_to_ascii (string, edge_serial->manuf_descriptor.OemAssyNumber, edge_serial->manuf_descriptor.OemAssyNumLength/2-1);
2841                 dbg("  OemAssyNumber:  %s", string);
2842                 dbg("  UartType:       %d", edge_serial->manuf_descriptor.UartType);
2843                 dbg("  IonPid:         %d", edge_serial->manuf_descriptor.IonPid);
2844                 dbg("  IonConfig:      %d", edge_serial->manuf_descriptor.IonConfig);
2845         }
2846 }
2847
2848
2849 /****************************************************************************
2850  * get_boot_desc
2851  *      reads in the bootloader descriptor and stores it into the serial
2852  *      structure.
2853  ****************************************************************************/
2854 static void get_boot_desc (struct edgeport_serial *edge_serial)
2855 {
2856         int response;
2857
2858         dbg("getting boot descriptor");
2859
2860         response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2861                             (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2862                             (__u8 *)(&edge_serial->boot_descriptor));
2863
2864         if (response < 1) {
2865                 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2866         } else {
2867                 dbg("**Boot Descriptor:");
2868                 dbg("  BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2869                 dbg("  MajorVersion:   %d", edge_serial->boot_descriptor.MajorVersion);
2870                 dbg("  MinorVersion:   %d", edge_serial->boot_descriptor.MinorVersion);
2871                 dbg("  BuildNumber:    %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2872                 dbg("  Capabilities:   0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2873                 dbg("  UConfig0:       %d", edge_serial->boot_descriptor.UConfig0);
2874                 dbg("  UConfig1:       %d", edge_serial->boot_descriptor.UConfig1);
2875         }
2876 }
2877
2878
2879 /****************************************************************************
2880  * load_application_firmware
2881  *      This is called to load the application firmware to the device
2882  ****************************************************************************/
2883 static void load_application_firmware (struct edgeport_serial *edge_serial)
2884 {
2885         struct edge_firmware_image_record *record;
2886         unsigned char *firmware;
2887         unsigned char *FirmwareImage;
2888         int ImageSize;
2889         int response;
2890
2891
2892         switch (edge_serial->product_info.iDownloadFile) {
2893                 case EDGE_DOWNLOAD_FILE_I930:
2894                         dbg("downloading firmware version (930) %d.%d.%d",
2895                             OperationalCodeImageVersion_GEN1.MajorVersion,
2896                             OperationalCodeImageVersion_GEN1.MinorVersion,
2897                             OperationalCodeImageVersion_GEN1.BuildNumber);
2898                         firmware = &OperationalCodeImage_GEN1[0];
2899                         FirmwareImage = &OperationalCodeImage_GEN1[0];
2900                         ImageSize = sizeof(OperationalCodeImage_GEN1);
2901                         break;
2902
2903                 case EDGE_DOWNLOAD_FILE_80251:
2904                         dbg("downloading firmware version (80251) %d.%d.%d",
2905                             OperationalCodeImageVersion_GEN2.MajorVersion,
2906                             OperationalCodeImageVersion_GEN2.MinorVersion,
2907                             OperationalCodeImageVersion_GEN2.BuildNumber);
2908                         firmware = &OperationalCodeImage_GEN2[0];
2909                         FirmwareImage = &OperationalCodeImage_GEN2[0];
2910                         ImageSize = sizeof(OperationalCodeImage_GEN2);
2911                         break;
2912
2913                 case EDGE_DOWNLOAD_FILE_NONE:
2914                         dbg     ("No download file specified, skipping download\n");
2915                         return;
2916
2917                 default:
2918                         return;
2919         }
2920
2921
2922         for (;;) {
2923                 record = (struct edge_firmware_image_record *)firmware;
2924                 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2925                 if (response < 0) {
2926                         dev_err(&edge_serial->serial->dev->dev, "sram_write failed (%x, %x, %d)\n", le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len));
2927                         break;
2928                 }
2929                 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2930                 if (firmware >= &FirmwareImage[ImageSize]) {
2931                         break;
2932                 }
2933         }
2934
2935         dbg("sending exec_dl_code");
2936         response = usb_control_msg (edge_serial->serial->dev,
2937                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2938                                     USB_REQUEST_ION_EXEC_DL_CODE,
2939                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2940
2941         return;
2942 }
2943
2944
2945 /****************************************************************************
2946  * edge_startup
2947  ****************************************************************************/
2948 static int edge_startup (struct usb_serial *serial)
2949 {
2950         struct edgeport_serial *edge_serial;
2951         struct edgeport_port *edge_port;
2952         struct usb_device *dev;
2953         int i;
2954
2955         dev = serial->dev;
2956
2957         /* create our private serial structure */
2958         edge_serial = kmalloc (sizeof(struct edgeport_serial), GFP_KERNEL);
2959         if (edge_serial == NULL) {
2960                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2961                 return -ENOMEM;
2962         }
2963         memset (edge_serial, 0, sizeof(struct edgeport_serial));
2964         spin_lock_init(&edge_serial->es_lock);
2965         edge_serial->serial = serial;
2966         usb_set_serial_data(serial, edge_serial);
2967
2968         /* get the name for the device from the device */
2969         if ( (i = get_string(dev, dev->descriptor.iManufacturer, &edge_serial->name[0])) != 0) {
2970                 edge_serial->name[i-1] = ' ';
2971         }
2972
2973         get_string(dev, dev->descriptor.iProduct, &edge_serial->name[i]);
2974
2975         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2976
2977         /* get the manufacturing descriptor for this device */
2978         get_manufacturing_desc (edge_serial);
2979
2980         /* get the boot descriptor */
2981         get_boot_desc (edge_serial);
2982
2983         get_product_info(edge_serial);
2984
2985         /* set the number of ports from the manufacturing description */
2986         /* serial->num_ports = serial->product_info.NumPorts; */
2987         if (edge_serial->product_info.NumPorts != serial->num_ports) {
2988                 warn("%s - Device Reported %d serial ports vs core "
2989                      "thinking we have %d ports, email greg@kroah.com this info.",
2990                      __FUNCTION__, edge_serial->product_info.NumPorts,
2991                      serial->num_ports);
2992         }
2993
2994         dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2995
2996         /* now load the application firmware into this device */
2997         load_application_firmware (edge_serial);
2998
2999         dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
3000
3001         /* Check current Edgeport EEPROM and update if necessary */
3002         update_edgeport_E2PROM (edge_serial);
3003
3004         dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
3005
3006         /* set the configuration to use #1 */
3007 //      dbg("set_configuration 1");
3008 //      usb_set_configuration (dev, 1);
3009
3010         /* we set up the pointers to the endpoints in the edge_open function,
3011          * as the structures aren't created yet. */
3012
3013         /* set up our port private structures */
3014         for (i = 0; i < serial->num_ports; ++i) {
3015                 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
3016                 if (edge_port == NULL) {
3017                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
3018                         usb_set_serial_data(serial, NULL);
3019                         kfree(edge_serial);
3020                         return -ENOMEM;
3021                 }
3022                 memset (edge_port, 0, sizeof(struct edgeport_port));
3023                 spin_lock_init(&edge_port->ep_lock);
3024                 edge_port->port = serial->port[i];
3025                 usb_set_serial_port_data(serial->port[i], edge_port);
3026         }
3027
3028         return 0;
3029 }
3030
3031
3032 /****************************************************************************
3033  * edge_shutdown
3034  *      This function is called whenever the device is removed from the usb bus.
3035  ****************************************************************************/
3036 static void edge_shutdown (struct usb_serial *serial)
3037 {
3038         int i;
3039
3040         dbg("%s", __FUNCTION__);
3041
3042         /* stop reads and writes on all ports */
3043         for (i=0; i < serial->num_ports; ++i) {
3044                 kfree (usb_get_serial_port_data(serial->port[i]));
3045                 usb_set_serial_port_data(serial->port[i],  NULL);
3046         }
3047         kfree (usb_get_serial_data(serial));
3048         usb_set_serial_data(serial, NULL);
3049 }
3050
3051
3052 /****************************************************************************
3053  * edgeport_init
3054  *      This is called by the module subsystem, or on startup to initialize us
3055  ****************************************************************************/
3056 static int __init edgeport_init(void)
3057 {
3058         int retval;
3059
3060         retval = usb_serial_register(&edgeport_2port_device);
3061         if (retval)
3062                 goto failed_2port_device_register;
3063         retval = usb_serial_register(&edgeport_4port_device);
3064         if (retval)
3065                 goto failed_4port_device_register;
3066         retval = usb_serial_register(&edgeport_8port_device);
3067         if (retval)
3068                 goto failed_8port_device_register;
3069         retval = usb_register(&io_driver);
3070         if (retval)
3071                 goto failed_usb_register;
3072         info(DRIVER_DESC " " DRIVER_VERSION);
3073         return 0;
3074
3075 failed_usb_register:
3076         usb_serial_deregister(&edgeport_8port_device);
3077 failed_8port_device_register:
3078         usb_serial_deregister(&edgeport_4port_device);
3079 failed_4port_device_register:
3080         usb_serial_deregister(&edgeport_2port_device);
3081 failed_2port_device_register:
3082         return retval;
3083 }
3084
3085
3086 /****************************************************************************
3087  * edgeport_exit
3088  *      Called when the driver is about to be unloaded.
3089  ****************************************************************************/
3090 static void __exit edgeport_exit (void)
3091 {
3092         usb_deregister (&io_driver);
3093         usb_serial_deregister (&edgeport_2port_device);
3094         usb_serial_deregister (&edgeport_4port_device);
3095         usb_serial_deregister (&edgeport_8port_device);
3096 }
3097
3098 module_init(edgeport_init);
3099 module_exit(edgeport_exit);
3100
3101 /* Module information */
3102 MODULE_AUTHOR( DRIVER_AUTHOR );
3103 MODULE_DESCRIPTION( DRIVER_DESC );
3104 MODULE_LICENSE("GPL");
3105
3106 module_param(debug, bool, S_IRUGO | S_IWUSR);
3107 MODULE_PARM_DESC(debug, "Debug enabled or not");
3108
3109 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3110 MODULE_PARM_DESC(debug, "Low latency enabled or not");