git.oblomov.eu Git - linux-2.6/blob - 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  */
  31
  32 #include <linux/kernel.h>
  33 #include <linux/jiffies.h>
  34 #include <linux/errno.h>
  35 #include <linux/init.h>
  36 #include <linux/slab.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_driver.h>
  39 #include <linux/tty_flip.h>
  40 #include <linux/module.h>
  41 #include <linux/spinlock.h>
  42 #include <linux/serial.h>
  43 #include <linux/ioctl.h>
  44 #include <linux/wait.h>
  45 #include <asm/uaccess.h>
  46 #include <linux/usb.h>
  47 #include <linux/usb/serial.h>
  48 #include "io_edgeport.h"
  49 #include "io_ionsp.h"           /* info for the iosp messages */
  50 #include "io_16654.h"           /* 16654 UART defines */
  51
  52 /*
  53  * Version Information
  54  */
  55 #define DRIVER_VERSION "v2.7"
  56 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  57 #define DRIVER_DESC "Edgeport USB Serial Driver"
  58
  59 /* First, the latest boot code - for first generation edgeports */
  60 #define IMAGE_ARRAY_NAME        BootCodeImage_GEN1
  61 #define IMAGE_VERSION_NAME      BootCodeImageVersion_GEN1
  62 #include "io_fw_boot.h"         /* the bootloader firmware to download to a device, if it needs it */
  63
  64 /* for second generation edgeports */
  65 #define IMAGE_ARRAY_NAME        BootCodeImage_GEN2
  66 #define IMAGE_VERSION_NAME      BootCodeImageVersion_GEN2
  67 #include "io_fw_boot2.h"        /* the bootloader firmware to download to a device, if it needs it */
  68
  69 /* Then finally the main run-time operational code - for first generation edgeports */
  70 #define IMAGE_ARRAY_NAME        OperationalCodeImage_GEN1
  71 #define IMAGE_VERSION_NAME      OperationalCodeImageVersion_GEN1
  72 #include "io_fw_down.h"         /* Define array OperationalCodeImage[] */
  73
  74 /* for second generation edgeports */
  75 #define IMAGE_ARRAY_NAME        OperationalCodeImage_GEN2
  76 #define IMAGE_VERSION_NAME      OperationalCodeImageVersion_GEN2
  77 #include "io_fw_down2.h"        /* Define array OperationalCodeImage[] */
  78
  79 #define MAX_NAME_LEN            64
  80
  81 #define CHASE_TIMEOUT           (5*HZ)          /* 5 seconds */
  82 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  83 #define COMMAND_TIMEOUT         (5*HZ)          /* 5 seconds */
  84
  85 /* receive port state */
  86 enum RXSTATE {
  87         EXPECT_HDR1 = 0,        /* Expect header byte 1 */
  88         EXPECT_HDR2 = 1,        /* Expect header byte 2 */
  89         EXPECT_DATA = 2,        /* Expect 'RxBytesRemaining' data */
  90         EXPECT_HDR3 = 3,        /* Expect header byte 3 (for status hdrs only) */
  91 };
  92
  93
  94 /* Transmit Fifo
  95  * This Transmit queue is an extension of the edgeport Rx buffer.
  96  * The maximum amount of data buffered in both the edgeport
  97  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
  98  */
  99 struct TxFifo {
 100         unsigned int    head;   /* index to head pointer (write) */
 101         unsigned int    tail;   /* index to tail pointer (read)  */
 102         unsigned int    count;  /* Bytes in queue */
 103         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
 104         unsigned char   *fifo;  /* allocated Buffer */
 105 };
 106
 107 /* This structure holds all of the local port information */
 108 struct edgeport_port {
 109         __u16                   txCredits;              /* our current credits for this port */
 110         __u16                   maxTxCredits;           /* the max size of the port */
 111
 112         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
 113         struct urb              *write_urb;             /* write URB for this port */
 114         char                    write_in_progress;      /* TRUE while a write URB is outstanding */
 115         spinlock_t              ep_lock;
 116
 117         __u8                    shadowLCR;              /* last LCR value received */
 118         __u8                    shadowMCR;              /* last MCR value received */
 119         __u8                    shadowMSR;              /* last MSR value received */
 120         __u8                    shadowLSR;              /* last LSR value received */
 121         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 122         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 123         __u8                    validDataMask;
 124         __u32                   baudRate;
 125
 126         char                    open;
 127         char                    openPending;
 128         char                    commandPending;
 129         char                    closePending;
 130         char                    chaseResponsePending;
 131
 132         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 133         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 134         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 135         wait_queue_head_t       delta_msr_wait;         /* for handling sleeping while waiting for msr change to happen */
 136
 137         struct async_icount     icount;
 138         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 139 };
 140
 141
 142 /* This structure holds all of the individual device information */
 143 struct edgeport_serial {
 144         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 145
 146         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 147         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 148         struct edgeport_product_info    product_info;           /* Product Info */
 149
 150         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 151         unsigned char *         interrupt_in_buffer;            /* the buffer we use for the interrupt endpoint */
 152         struct urb *            interrupt_read_urb;             /* our interrupt urb */
 153
 154         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 155         unsigned char *         bulk_in_buffer;                 /* the buffer we use for the bulk in endpoint */
 156         struct urb *            read_urb;                       /* our bulk read urb */
 157         int                     read_in_progress;
 158         spinlock_t              es_lock;
 159
 160         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 161
 162         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 163
 164         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 165         __u8                    rxHeader1;                      /* receive header byte 1 */
 166         __u8                    rxHeader2;                      /* receive header byte 2 */
 167         __u8                    rxHeader3;                      /* receive header byte 3 */
 168         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 169         __u8                    rxStatusCode;                   /* the receive status code */
 170         __u8                    rxStatusParam;                  /* the receive status paramater */
 171         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 172         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 173 };
 174
 175 /* baud rate information */
 176 struct divisor_table_entry {
 177         __u32   BaudRate;
 178         __u16  Divisor;
 179 };
 180
 181 //
 182 // Define table of divisors for Rev A EdgePort/4 hardware
 183 // These assume a 3.6864MHz crystal, the standard /16, and
 184 // MCR.7 = 0.
 185 //
 186 static const struct divisor_table_entry divisor_table[] = {
 187         {   50,         4608},
 188         {   75,         3072},
 189         {   110,        2095},          /* 2094.545455 => 230450   => .0217 % over */
 190         {   134,        1713},          /* 1713.011152 => 230398.5 => .00065% under */
 191         {   150,        1536},
 192         {   300,        768},
 193         {   600,        384},
 194         {   1200,       192},
 195         {   1800,       128},
 196         {   2400,       96},
 197         {   4800,       48},
 198         {   7200,       32},
 199         {   9600,       24},
 200         {   14400,      16},
 201         {   19200,      12},
 202         {   38400,      6},
 203         {   57600,      4},
 204         {   115200,     2},
 205         {   230400,     1},
 206 };
 207
 208 /* local variables */
 209 static int debug;
 210
 211 static int low_latency = 1;     /* tty low latency flag, on by default */
 212
 213 static int CmdUrbs = 0;         /* Number of outstanding Command Write Urbs */
 214
 215
 216 /* local function prototypes */
 217
 218 /* function prototypes for all URB callbacks */
 219 static void edge_interrupt_callback     (struct urb *urb);
 220 static void edge_bulk_in_callback       (struct urb *urb);
 221 static void edge_bulk_out_data_callback (struct urb *urb);
 222 static void edge_bulk_out_cmd_callback  (struct urb *urb);
 223
 224 /* function prototypes for the usbserial callbacks */
 225 static int  edge_open                   (struct usb_serial_port *port, struct file *filp);
 226 static void edge_close                  (struct usb_serial_port *port, struct file *filp);
 227 static int  edge_write                  (struct usb_serial_port *port, const unsigned char *buf, int count);
 228 static int  edge_write_room             (struct usb_serial_port *port);
 229 static int  edge_chars_in_buffer        (struct usb_serial_port *port);
 230 static void edge_throttle               (struct usb_serial_port *port);
 231 static void edge_unthrottle             (struct usb_serial_port *port);
 232 static void edge_set_termios            (struct usb_serial_port *port, struct ktermios *old_termios);
 233 static int  edge_ioctl                  (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
 234 static void edge_break                  (struct usb_serial_port *port, int break_state);
 235 static int  edge_tiocmget               (struct usb_serial_port *port, struct file *file);
 236 static int  edge_tiocmset               (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear);
 237 static int  edge_startup                (struct usb_serial *serial);
 238 static void edge_shutdown               (struct usb_serial *serial);
 239
 240
 241 #include "io_tables.h"  /* all of the devices that this driver supports */
 242
 243 static struct usb_driver io_driver = {
 244         .name =         "io_edgeport",
 245         .probe =        usb_serial_probe,
 246         .disconnect =   usb_serial_disconnect,
 247         .id_table =     id_table_combined,
 248         .no_dynamic_id =        1,
 249 };
 250
 251 /* function prototypes for all of our local functions */
 252 static void  process_rcvd_data          (struct edgeport_serial *edge_serial, unsigned char *buffer, __u16 bufferLength);
 253 static void process_rcvd_status         (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3);
 254 static void edge_tty_recv                       (struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
 255 static void handle_new_msr              (struct edgeport_port *edge_port, __u8 newMsr);
 256 static void handle_new_lsr              (struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data);
 257 static int  send_iosp_ext_cmd           (struct edgeport_port *edge_port, __u8 command, __u8 param);
 258 static int  calc_baud_rate_divisor      (int baud_rate, int *divisor);
 259 static int  send_cmd_write_baud_rate    (struct edgeport_port *edge_port, int baudRate);
 260 static void change_port_settings        (struct edgeport_port *edge_port, struct ktermios *old_termios);
 261 static int  send_cmd_write_uart_register        (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue);
 262 static int  write_cmd_usb               (struct edgeport_port *edge_port, unsigned char *buffer, int writeLength);
 263 static void send_more_port_data         (struct edgeport_serial *edge_serial, struct edgeport_port *edge_port);
 264
 265 static int  sram_write                  (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 266 static int  rom_read                    (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 267 static int  rom_write                   (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data);
 268 static void get_manufacturing_desc      (struct edgeport_serial *edge_serial);
 269 static void get_boot_desc               (struct edgeport_serial *edge_serial);
 270 static void load_application_firmware   (struct edgeport_serial *edge_serial);
 271
 272 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size);
 273
 274
 275 // ************************************************************************
 276 // ************************************************************************
 277 // ************************************************************************
 278 // ************************************************************************
 279
 280 /************************************************************************
 281  *                                                                      *
 282  * update_edgeport_E2PROM()     Compare current versions of             *
 283  *                              Boot ROM and Manufacture                *
 284  *                              Descriptors with versions               *
 285  *                              embedded in this driver                 *
 286  *                                                                      *
 287  ************************************************************************/
 288 static void update_edgeport_E2PROM (struct edgeport_serial *edge_serial)
 289 {
 290         __u32 BootCurVer;
 291         __u32 BootNewVer;
 292         __u8 BootMajorVersion;
 293         __u8 BootMinorVersion;
 294         __le16 BootBuildNumber;
 295         __u8 *BootImage;
 296         __u32 BootSize;
 297         struct edge_firmware_image_record *record;
 298         unsigned char *firmware;
 299         int response;
 300
 301
 302         switch (edge_serial->product_info.iDownloadFile) {
 303                 case EDGE_DOWNLOAD_FILE_I930:
 304                         BootMajorVersion        = BootCodeImageVersion_GEN1.MajorVersion;
 305                         BootMinorVersion        = BootCodeImageVersion_GEN1.MinorVersion;
 306                         BootBuildNumber         = cpu_to_le16(BootCodeImageVersion_GEN1.BuildNumber);
 307                         BootImage               = &BootCodeImage_GEN1[0];
 308                         BootSize                = sizeof( BootCodeImage_GEN1 );
 309                         break;
 310
 311                 case EDGE_DOWNLOAD_FILE_80251:
 312                         BootMajorVersion        = BootCodeImageVersion_GEN2.MajorVersion;
 313                         BootMinorVersion        = BootCodeImageVersion_GEN2.MinorVersion;
 314                         BootBuildNumber         = cpu_to_le16(BootCodeImageVersion_GEN2.BuildNumber);
 315                         BootImage               = &BootCodeImage_GEN2[0];
 316                         BootSize                = sizeof( BootCodeImage_GEN2 );
 317                         break;
 318
 319                 default:
 320                         return;
 321         }
 322
 323         // Check Boot Image Version
 324         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 325                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 326                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 327
 328         BootNewVer = (BootMajorVersion << 24) +
 329                      (BootMinorVersion << 16) +
 330                       le16_to_cpu(BootBuildNumber);
 331
 332         dbg("Current Boot Image version %d.%d.%d",
 333             edge_serial->boot_descriptor.MajorVersion,
 334             edge_serial->boot_descriptor.MinorVersion,
 335             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 336
 337
 338         if (BootNewVer > BootCurVer) {
 339                 dbg("**Update Boot Image from %d.%d.%d to %d.%d.%d",
 340                     edge_serial->boot_descriptor.MajorVersion,
 341                     edge_serial->boot_descriptor.MinorVersion,
 342                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 343                     BootMajorVersion,
 344                     BootMinorVersion,
 345                     le16_to_cpu(BootBuildNumber));
 346
 347
 348                 dbg("Downloading new Boot Image");
 349
 350                 firmware = BootImage;
 351
 352                 for (;;) {
 353                         record = (struct edge_firmware_image_record *)firmware;
 354                         response = rom_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
 355                         if (response < 0) {
 356                                 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));
 357                                 break;
 358                         }
 359                         firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
 360                         if (firmware >= &BootImage[BootSize]) {
 361                                 break;
 362                         }
 363                 }
 364         } else {
 365                 dbg("Boot Image -- already up to date");
 366         }
 367 }
 368
 369
 370 /************************************************************************
 371  *                                                                      *
 372  *  Get string descriptor from device                                   *
 373  *                                                                      *
 374  ************************************************************************/
 375 static int get_string (struct usb_device *dev, int Id, char *string, int buflen)
 376 {
 377         struct usb_string_descriptor StringDesc;
 378         struct usb_string_descriptor *pStringDesc;
 379
 380         dbg("%s - USB String ID = %d", __FUNCTION__, Id );
 381
 382         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
 383                 return 0;
 384         }
 385
 386         pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
 387
 388         if (!pStringDesc) {
 389                 return 0;
 390         }
 391
 392         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
 393                 kfree(pStringDesc);
 394                 return 0;
 395         }
 396
 397         unicode_to_ascii(string, buflen, pStringDesc->wData, pStringDesc->bLength/2);
 398
 399         kfree(pStringDesc);
 400         return strlen(string);
 401 }
 402
 403
 404 #if 0
 405 /************************************************************************
 406  *
 407  *  Get string descriptor from device
 408  *
 409  ************************************************************************/
 410 static int get_string_desc (struct usb_device *dev, int Id, struct usb_string_descriptor **pRetDesc)
 411 {
 412         struct usb_string_descriptor StringDesc;
 413         struct usb_string_descriptor *pStringDesc;
 414
 415         dbg("%s - USB String ID = %d", __FUNCTION__, Id );
 416
 417         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, &StringDesc, sizeof(StringDesc))) {
 418                 return 0;
 419         }
 420
 421         pStringDesc = kmalloc (StringDesc.bLength, GFP_KERNEL);
 422
 423         if (!pStringDesc) {
 424                 return -1;
 425         }
 426
 427         if (!usb_get_descriptor(dev, USB_DT_STRING, Id, pStringDesc, StringDesc.bLength )) {
 428                 kfree(pStringDesc);
 429                 return -1;
 430         }
 431
 432         *pRetDesc = pStringDesc;
 433         return 0;
 434 }
 435 #endif
 436
 437 static void get_product_info(struct edgeport_serial *edge_serial)
 438 {
 439         struct edgeport_product_info *product_info = &edge_serial->product_info;
 440
 441         memset (product_info, 0, sizeof(struct edgeport_product_info));
 442
 443         product_info->ProductId         = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 444         product_info->NumPorts          = edge_serial->manuf_descriptor.NumPorts;
 445         product_info->ProdInfoVer       = 0;
 446
 447         product_info->RomSize           = edge_serial->manuf_descriptor.RomSize;
 448         product_info->RamSize           = edge_serial->manuf_descriptor.RamSize;
 449         product_info->CpuRev            = edge_serial->manuf_descriptor.CpuRev;
 450         product_info->BoardRev          = edge_serial->manuf_descriptor.BoardRev;
 451
 452         product_info->BootMajorVersion  = edge_serial->boot_descriptor.MajorVersion;
 453         product_info->BootMinorVersion  = edge_serial->boot_descriptor.MinorVersion;
 454         product_info->BootBuildNumber   = edge_serial->boot_descriptor.BuildNumber;
 455
 456         memcpy(product_info->ManufactureDescDate, edge_serial->manuf_descriptor.DescDate, sizeof(edge_serial->manuf_descriptor.DescDate));
 457
 458         // check if this is 2nd generation hardware
 459         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ION_DEVICE_ID_80251_NETCHIP) {
 460                 product_info->FirmwareMajorVersion      = OperationalCodeImageVersion_GEN2.MajorVersion;
 461                 product_info->FirmwareMinorVersion      = OperationalCodeImageVersion_GEN2.MinorVersion;
 462                 product_info->FirmwareBuildNumber       = cpu_to_le16(OperationalCodeImageVersion_GEN2.BuildNumber);
 463                 product_info->iDownloadFile             = EDGE_DOWNLOAD_FILE_80251;
 464         } else {
 465                 product_info->FirmwareMajorVersion      = OperationalCodeImageVersion_GEN1.MajorVersion;
 466                 product_info->FirmwareMinorVersion      = OperationalCodeImageVersion_GEN1.MinorVersion;
 467                 product_info->FirmwareBuildNumber       = cpu_to_le16(OperationalCodeImageVersion_GEN1.BuildNumber);
 468                 product_info->iDownloadFile             = EDGE_DOWNLOAD_FILE_I930;
 469         }
 470
 471         // Determine Product type and set appropriate flags
 472         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 473                 case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 474                 case ION_DEVICE_ID_EDGEPORT_4T:
 475                 case ION_DEVICE_ID_EDGEPORT_4:
 476                 case ION_DEVICE_ID_EDGEPORT_2:
 477                 case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 478                 case ION_DEVICE_ID_EDGEPORT_8:
 479                 case ION_DEVICE_ID_EDGEPORT_421:
 480                 case ION_DEVICE_ID_EDGEPORT_21:
 481                 case ION_DEVICE_ID_EDGEPORT_2_DIN:
 482                 case ION_DEVICE_ID_EDGEPORT_4_DIN:
 483                 case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 484                         product_info->IsRS232 = 1;
 485                         break;
 486
 487                 case ION_DEVICE_ID_EDGEPORT_2I:                            // Edgeport/2 RS422/RS485
 488                         product_info->IsRS422 = 1;
 489                         product_info->IsRS485 = 1;
 490                         break;
 491
 492                 case ION_DEVICE_ID_EDGEPORT_8I:                            // Edgeport/4 RS422
 493                 case ION_DEVICE_ID_EDGEPORT_4I:                            // Edgeport/4 RS422
 494                         product_info->IsRS422 = 1;
 495                         break;
 496         }
 497
 498         // Dump Product Info structure
 499         dbg("**Product Information:");
 500         dbg("  ProductId             %x", product_info->ProductId );
 501         dbg("  NumPorts              %d", product_info->NumPorts );
 502         dbg("  ProdInfoVer           %d", product_info->ProdInfoVer );
 503         dbg("  IsServer              %d", product_info->IsServer);
 504         dbg("  IsRS232               %d", product_info->IsRS232 );
 505         dbg("  IsRS422               %d", product_info->IsRS422 );
 506         dbg("  IsRS485               %d", product_info->IsRS485 );
 507         dbg("  RomSize               %d", product_info->RomSize );
 508         dbg("  RamSize               %d", product_info->RamSize );
 509         dbg("  CpuRev                %x", product_info->CpuRev  );
 510         dbg("  BoardRev              %x", product_info->BoardRev);
 511         dbg("  BootMajorVersion      %d.%d.%d", product_info->BootMajorVersion,
 512             product_info->BootMinorVersion,
 513             le16_to_cpu(product_info->BootBuildNumber));
 514         dbg("  FirmwareMajorVersion  %d.%d.%d", product_info->FirmwareMajorVersion,
 515             product_info->FirmwareMinorVersion,
 516             le16_to_cpu(product_info->FirmwareBuildNumber));
 517         dbg("  ManufactureDescDate   %d/%d/%d", product_info->ManufactureDescDate[0],
 518             product_info->ManufactureDescDate[1],
 519             product_info->ManufactureDescDate[2]+1900);
 520         dbg("  iDownloadFile         0x%x",     product_info->iDownloadFile);
 521
 522 }
 523
 524
 525 /************************************************************************/
 526 /************************************************************************/
 527 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 528 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 529 /************************************************************************/
 530 /************************************************************************/
 531
 532 /*****************************************************************************
 533  * edge_interrupt_callback
 534  *      this is the callback function for when we have received data on the
 535  *      interrupt endpoint.
 536  *****************************************************************************/
 537 static void edge_interrupt_callback (struct urb *urb)
 538 {
 539         struct edgeport_serial  *edge_serial = (struct edgeport_serial *)urb->context;
 540         struct edgeport_port *edge_port;
 541         struct usb_serial_port *port;
 542         unsigned char *data = urb->transfer_buffer;
 543         int length = urb->actual_length;
 544         int bytes_avail;
 545         int position;
 546         int txCredits;
 547         int portNumber;
 548         int result;
 549
 550         dbg("%s", __FUNCTION__);
 551
 552         switch (urb->status) {
 553         case 0:
 554                 /* success */
 555                 break;
 556         case -ECONNRESET:
 557         case -ENOENT:
 558         case -ESHUTDOWN:
 559                 /* this urb is terminated, clean up */
 560                 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
 561                 return;
 562         default:
 563                 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
 564                 goto exit;
 565         }
 566
 567         // process this interrupt-read even if there are no ports open
 568         if (length) {
 569                 usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
 570
 571                 if (length > 1) {
 572                         bytes_avail = data[0] | (data[1] << 8);
 573                         if (bytes_avail) {
 574                                 spin_lock(&edge_serial->es_lock);
 575                                 edge_serial->rxBytesAvail += bytes_avail;
 576                                 dbg("%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d", __FUNCTION__, bytes_avail, edge_serial->rxBytesAvail, edge_serial->read_in_progress);
 577
 578                                 if (edge_serial->rxBytesAvail > 0 &&
 579                                     !edge_serial->read_in_progress) {
 580                                         dbg("%s - posting a read", __FUNCTION__);
 581                                         edge_serial->read_in_progress = TRUE;
 582
 583                                         /* we have pending bytes on the bulk in pipe, send a request */
 584                                         edge_serial->read_urb->dev = edge_serial->serial->dev;
 585                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 586                                         if (result) {
 587                                                 dev_err(&edge_serial->serial->dev->dev, "%s - usb_submit_urb(read bulk) failed with result = %d\n", __FUNCTION__, result);
 588                                                 edge_serial->read_in_progress = FALSE;
 589                                         }
 590                                 }
 591                                 spin_unlock(&edge_serial->es_lock);
 592                         }
 593                 }
 594                 /* grab the txcredits for the ports if available */
 595                 position = 2;
 596                 portNumber = 0;
 597                 while ((position < length) && (portNumber < edge_serial->serial->num_ports)) {
 598                         txCredits = data[position] | (data[position+1] << 8);
 599                         if (txCredits) {
 600                                 port = edge_serial->serial->port[portNumber];
 601                                 edge_port = usb_get_serial_port_data(port);
 602                                 if (edge_port->open) {
 603                                         spin_lock(&edge_port->ep_lock);
 604                                         edge_port->txCredits += txCredits;
 605                                         spin_unlock(&edge_port->ep_lock);
 606                                         dbg("%s - txcredits for port%d = %d", __FUNCTION__, portNumber, edge_port->txCredits);
 607
 608                                         /* tell the tty driver that something has changed */
 609                                         if (edge_port->port->tty)
 610                                                 tty_wakeup(edge_port->port->tty);
 611
 612                                         // Since we have more credit, check if more data can be sent
 613                                         send_more_port_data(edge_serial, edge_port);
 614                                 }
 615                         }
 616                         position += 2;
 617                         ++portNumber;
 618                 }
 619         }
 620
 621 exit:
 622         result = usb_submit_urb (urb, GFP_ATOMIC);
 623         if (result) {
 624                 dev_err(&urb->dev->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, result);
 625         }
 626 }
 627
 628
 629 /*****************************************************************************
 630  * edge_bulk_in_callback
 631  *      this is the callback function for when we have received data on the
 632  *      bulk in endpoint.
 633  *****************************************************************************/
 634 static void edge_bulk_in_callback (struct urb *urb)
 635 {
 636         struct edgeport_serial  *edge_serial = (struct edgeport_serial *)urb->context;
 637         unsigned char           *data = urb->transfer_buffer;
 638         int                     status;
 639         __u16                   raw_data_length;
 640
 641         dbg("%s", __FUNCTION__);
 642
 643         if (urb->status) {
 644                 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, urb->status);
 645                 edge_serial->read_in_progress = FALSE;
 646                 return;
 647         }
 648
 649         if (urb->actual_length == 0) {
 650                 dbg("%s - read bulk callback with no data", __FUNCTION__);
 651                 edge_serial->read_in_progress = FALSE;
 652                 return;
 653         }
 654
 655         raw_data_length = urb->actual_length;
 656
 657         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, raw_data_length, data);
 658
 659         spin_lock(&edge_serial->es_lock);
 660
 661         /* decrement our rxBytes available by the number that we just got */
 662         edge_serial->rxBytesAvail -= raw_data_length;
 663
 664         dbg("%s - Received = %d, rxBytesAvail %d", __FUNCTION__, raw_data_length, edge_serial->rxBytesAvail);
 665
 666         process_rcvd_data (edge_serial, data, urb->actual_length);
 667
 668         /* check to see if there's any more data for us to read */
 669         if (edge_serial->rxBytesAvail > 0) {
 670                 dbg("%s - posting a read", __FUNCTION__);
 671                 edge_serial->read_urb->dev = edge_serial->serial->dev;
 672                 status = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 673                 if (status) {
 674                         dev_err(&urb->dev->dev, "%s - usb_submit_urb(read bulk) failed, status = %d\n", __FUNCTION__, status);
 675                         edge_serial->read_in_progress = FALSE;
 676                 }
 677         } else {
 678                 edge_serial->read_in_progress = FALSE;
 679         }
 680
 681         spin_unlock(&edge_serial->es_lock);
 682 }
 683
 684
 685 /*****************************************************************************
 686  * edge_bulk_out_data_callback
 687  *      this is the callback function for when we have finished sending serial data
 688  *      on the bulk out endpoint.
 689  *****************************************************************************/
 690 static void edge_bulk_out_data_callback (struct urb *urb)
 691 {
 692         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
 693         struct tty_struct *tty;
 694
 695         dbg("%s", __FUNCTION__);
 696
 697         if (urb->status) {
 698                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, urb->status);
 699         }
 700
 701         tty = edge_port->port->tty;
 702
 703         if (tty && edge_port->open) {
 704                 /* let the tty driver wakeup if it has a special write_wakeup function */
 705                 tty_wakeup(tty);
 706         }
 707
 708         // Release the Write URB
 709         edge_port->write_in_progress = FALSE;
 710
 711         // Check if more data needs to be sent
 712         send_more_port_data((struct edgeport_serial *)(usb_get_serial_data(edge_port->port->serial)), edge_port);
 713 }
 714
 715
 716 /*****************************************************************************
 717  * BulkOutCmdCallback
 718  *      this is the callback function for when we have finished sending a command
 719  *      on the bulk out endpoint.
 720  *****************************************************************************/
 721 static void edge_bulk_out_cmd_callback (struct urb *urb)
 722 {
 723         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
 724         struct tty_struct *tty;
 725         int status = urb->status;
 726
 727         dbg("%s", __FUNCTION__);
 728
 729         CmdUrbs--;
 730         dbg("%s - FREE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
 731
 732
 733         /* clean up the transfer buffer */
 734         kfree(urb->transfer_buffer);
 735
 736         /* Free the command urb */
 737         usb_free_urb (urb);
 738
 739         if (status) {
 740                 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, status);
 741                 return;
 742         }
 743
 744         /* Get pointer to tty */
 745         tty = edge_port->port->tty;
 746
 747         /* tell the tty driver that something has changed */
 748         if (tty && edge_port->open)
 749                 tty_wakeup(tty);
 750
 751         /* we have completed the command */
 752         edge_port->commandPending = FALSE;
 753         wake_up(&edge_port->wait_command);
 754 }
 755
 756
 757 /*****************************************************************************
 758  * Driver tty interface functions
 759  *****************************************************************************/
 760
 761 /*****************************************************************************
 762  * SerialOpen
 763  *      this function is called by the tty driver when a port is opened
 764  *      If successful, we return 0
 765  *      Otherwise we return a negative error number.
 766  *****************************************************************************/
 767 static int edge_open (struct usb_serial_port *port, struct file * filp)
 768 {
 769         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 770         struct usb_serial *serial;
 771         struct edgeport_serial *edge_serial;
 772         int response;
 773
 774         dbg("%s - port %d", __FUNCTION__, port->number);
 775
 776         if (edge_port == NULL)
 777                 return -ENODEV;
 778
 779         if (port->tty)
 780                 port->tty->low_latency = low_latency;
 781
 782         /* see if we've set up our endpoint info yet (can't set it up in edge_startup
 783            as the structures were not set up at that time.) */
 784         serial = port->serial;
 785         edge_serial = usb_get_serial_data(serial);
 786         if (edge_serial == NULL) {
 787                 return -ENODEV;
 788         }
 789         if (edge_serial->interrupt_in_buffer == NULL) {
 790                 struct usb_serial_port *port0 = serial->port[0];
 791
 792                 /* not set up yet, so do it now */
 793                 edge_serial->interrupt_in_buffer = port0->interrupt_in_buffer;
 794                 edge_serial->interrupt_in_endpoint = port0->interrupt_in_endpointAddress;
 795                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 796                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 797                 edge_serial->bulk_in_endpoint = port0->bulk_in_endpointAddress;
 798                 edge_serial->read_urb = port0->read_urb;
 799                 edge_serial->bulk_out_endpoint = port0->bulk_out_endpointAddress;
 800
 801                 /* set up our interrupt urb */
 802                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 803                                  serial->dev,
 804                                  usb_rcvintpipe(serial->dev,
 805                                                 port0->interrupt_in_endpointAddress),
 806                                  port0->interrupt_in_buffer,
 807                                  edge_serial->interrupt_read_urb->transfer_buffer_length,
 808                                  edge_interrupt_callback, edge_serial,
 809                                  edge_serial->interrupt_read_urb->interval);
 810
 811                 /* set up our bulk in urb */
 812                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 813                                   usb_rcvbulkpipe(serial->dev,
 814                                                   port0->bulk_in_endpointAddress),
 815                                   port0->bulk_in_buffer,
 816                                   edge_serial->read_urb->transfer_buffer_length,
 817                                   edge_bulk_in_callback, edge_serial);
 818                 edge_serial->read_in_progress = FALSE;
 819
 820                 /* start interrupt read for this edgeport
 821                  * this interrupt will continue as long as the edgeport is connected */
 822                 response = usb_submit_urb (edge_serial->interrupt_read_urb, GFP_KERNEL);
 823                 if (response) {
 824                         dev_err(&port->dev, "%s - Error %d submitting control urb\n", __FUNCTION__, response);
 825                 }
 826         }
 827
 828         /* initialize our wait queues */
 829         init_waitqueue_head(&edge_port->wait_open);
 830         init_waitqueue_head(&edge_port->wait_chase);
 831         init_waitqueue_head(&edge_port->delta_msr_wait);
 832         init_waitqueue_head(&edge_port->wait_command);
 833
 834         /* initialize our icount structure */
 835         memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
 836
 837         /* initialize our port settings */
 838         edge_port->txCredits            = 0;                    /* Can't send any data yet */
 839         edge_port->shadowMCR            = MCR_MASTER_IE;        /* Must always set this bit to enable ints! */
 840         edge_port->chaseResponsePending = FALSE;
 841
 842         /* send a open port command */
 843         edge_port->openPending = TRUE;
 844         edge_port->open        = FALSE;
 845         response = send_iosp_ext_cmd (edge_port, IOSP_CMD_OPEN_PORT, 0);
 846
 847         if (response < 0) {
 848                 dev_err(&port->dev, "%s - error sending open port command\n", __FUNCTION__);
 849                 edge_port->openPending = FALSE;
 850                 return -ENODEV;
 851         }
 852
 853         /* now wait for the port to be completely opened */
 854         wait_event_timeout(edge_port->wait_open, (edge_port->openPending != TRUE), OPEN_TIMEOUT);
 855
 856         if (edge_port->open == FALSE) {
 857                 /* open timed out */
 858                 dbg("%s - open timedout", __FUNCTION__);
 859                 edge_port->openPending = FALSE;
 860                 return -ENODEV;
 861         }
 862
 863         /* create the txfifo */
 864         edge_port->txfifo.head  = 0;
 865         edge_port->txfifo.tail  = 0;
 866         edge_port->txfifo.count = 0;
 867         edge_port->txfifo.size  = edge_port->maxTxCredits;
 868         edge_port->txfifo.fifo  = kmalloc (edge_port->maxTxCredits, GFP_KERNEL);
 869
 870         if (!edge_port->txfifo.fifo) {
 871                 dbg("%s - no memory", __FUNCTION__);
 872                 edge_close (port, filp);
 873                 return -ENOMEM;
 874         }
 875
 876         /* Allocate a URB for the write */
 877         edge_port->write_urb = usb_alloc_urb (0, GFP_KERNEL);
 878         edge_port->write_in_progress = FALSE;
 879
 880         if (!edge_port->write_urb) {
 881                 dbg("%s - no memory", __FUNCTION__);
 882                 edge_close (port, filp);
 883                 return -ENOMEM;
 884         }
 885
 886         dbg("%s(%d) - Initialize TX fifo to %d bytes", __FUNCTION__, port->number, edge_port->maxTxCredits);
 887
 888         dbg("%s exited", __FUNCTION__);
 889
 890         return 0;
 891 }
 892
 893
 894 /************************************************************************
 895  *
 896  * block_until_chase_response
 897  *
 898  *      This function will block the close until one of the following:
 899  *              1. Response to our Chase comes from Edgeport
 900  *              2. A timout of 10 seconds without activity has expired
 901  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 902  *
 903  ************************************************************************/
 904 static void block_until_chase_response(struct edgeport_port *edge_port)
 905 {
 906         DEFINE_WAIT(wait);
 907         __u16 lastCredits;
 908         int timeout = 1*HZ;
 909         int loop = 10;
 910
 911         while (1) {
 912                 // Save Last credits
 913                 lastCredits = edge_port->txCredits;
 914
 915                 // Did we get our Chase response
 916                 if (edge_port->chaseResponsePending == FALSE) {
 917                         dbg("%s - Got Chase Response", __FUNCTION__);
 918
 919                         // did we get all of our credit back?
 920                         if (edge_port->txCredits == edge_port->maxTxCredits ) {
 921                                 dbg("%s - Got all credits", __FUNCTION__);
 922                                 return;
 923                         }
 924                 }
 925
 926                 // Block the thread for a while
 927                 prepare_to_wait(&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
 928                 schedule_timeout(timeout);
 929                 finish_wait(&edge_port->wait_chase, &wait);
 930
 931                 if (lastCredits == edge_port->txCredits) {
 932                         // No activity.. count down.
 933                         loop--;
 934                         if (loop == 0) {
 935                                 edge_port->chaseResponsePending = FALSE;
 936                                 dbg("%s - Chase TIMEOUT", __FUNCTION__);
 937                                 return;
 938                         }
 939                 } else {
 940                         // Reset timout value back to 10 seconds
 941                         dbg("%s - Last %d, Current %d", __FUNCTION__, lastCredits, edge_port->txCredits);
 942                         loop = 10;
 943                 }
 944         }
 945 }
 946
 947
 948 /************************************************************************
 949  *
 950  * block_until_tx_empty
 951  *
 952  *      This function will block the close until one of the following:
 953  *              1. TX count are 0
 954  *              2. The edgeport has stopped
 955  *              3. A timout of 3 seconds without activity has expired
 956  *
 957  ************************************************************************/
 958 static void block_until_tx_empty (struct edgeport_port *edge_port)
 959 {
 960         DEFINE_WAIT(wait);
 961         struct TxFifo *fifo = &edge_port->txfifo;
 962         __u32 lastCount;
 963         int timeout = HZ/10;
 964         int loop = 30;
 965
 966         while (1) {
 967                 // Save Last count
 968                 lastCount = fifo->count;
 969
 970                 // Is the Edgeport Buffer empty?
 971                 if (lastCount == 0) {
 972                         dbg("%s - TX Buffer Empty", __FUNCTION__);
 973                         return;
 974                 }
 975
 976                 // Block the thread for a while
 977                 prepare_to_wait (&edge_port->wait_chase, &wait, TASK_UNINTERRUPTIBLE);
 978                 schedule_timeout(timeout);
 979                 finish_wait(&edge_port->wait_chase, &wait);
 980
 981                 dbg("%s wait", __FUNCTION__);
 982
 983                 if (lastCount == fifo->count) {
 984                         // No activity.. count down.
 985                         loop--;
 986                         if (loop == 0) {
 987                                 dbg("%s - TIMEOUT", __FUNCTION__);
 988                                 return;
 989                         }
 990                 } else {
 991                         // Reset timout value back to seconds
 992                         loop = 30;
 993                 }
 994         }
 995 }
 996
 997
 998 /*****************************************************************************
 999  * edge_close
1000  *      this function is called by the tty driver when a port is closed
1001  *****************************************************************************/
1002 static void edge_close (struct usb_serial_port *port, struct file * filp)
1003 {
1004         struct edgeport_serial *edge_serial;
1005         struct edgeport_port *edge_port;
1006         int status;
1007
1008         dbg("%s - port %d", __FUNCTION__, port->number);
1009
1010         edge_serial = usb_get_serial_data(port->serial);
1011         edge_port = usb_get_serial_port_data(port);
1012         if ((edge_serial == NULL) || (edge_port == NULL))
1013                 return;
1014
1015         // block until tx is empty
1016         block_until_tx_empty(edge_port);
1017
1018         edge_port->closePending = TRUE;
1019
1020         /* flush and chase */
1021         edge_port->chaseResponsePending = TRUE;
1022
1023         dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1024         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1025         if (status == 0) {
1026                 // block until chase finished
1027                 block_until_chase_response(edge_port);
1028         } else {
1029                 edge_port->chaseResponsePending = FALSE;
1030         }
1031
1032         /* close the port */
1033         dbg("%s - Sending IOSP_CMD_CLOSE_PORT", __FUNCTION__);
1034         send_iosp_ext_cmd (edge_port, IOSP_CMD_CLOSE_PORT, 0);
1035
1036         //port->close = TRUE;
1037         edge_port->closePending = FALSE;
1038         edge_port->open = FALSE;
1039         edge_port->openPending = FALSE;
1040
1041         usb_kill_urb(edge_port->write_urb);
1042
1043         if (edge_port->write_urb) {
1044                 /* if this urb had a transfer buffer already (old transfer) free it */
1045                 kfree(edge_port->write_urb->transfer_buffer);
1046                 usb_free_urb(edge_port->write_urb);
1047                 edge_port->write_urb = NULL;
1048         }
1049         kfree(edge_port->txfifo.fifo);
1050         edge_port->txfifo.fifo = NULL;
1051
1052         dbg("%s exited", __FUNCTION__);
1053 }
1054
1055 /*****************************************************************************
1056  * SerialWrite
1057  *      this function is called by the tty driver when data should be written to
1058  *      the port.
1059  *      If successful, we return the number of bytes written, otherwise we return
1060  *      a negative error number.
1061  *****************************************************************************/
1062 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
1063 {
1064         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1065         struct TxFifo *fifo;
1066         int copySize;
1067         int bytesleft;
1068         int firsthalf;
1069         int secondhalf;
1070         unsigned long flags;
1071
1072         dbg("%s - port %d", __FUNCTION__, port->number);
1073
1074         if (edge_port == NULL)
1075                 return -ENODEV;
1076
1077         // get a pointer to the Tx fifo
1078         fifo = &edge_port->txfifo;
1079
1080         spin_lock_irqsave(&edge_port->ep_lock, flags);
1081
1082         // calculate number of bytes to put in fifo
1083         copySize = min ((unsigned int)count, (edge_port->txCredits - fifo->count));
1084
1085         dbg("%s(%d) of %d byte(s) Fifo room  %d -- will copy %d bytes", __FUNCTION__,
1086             port->number, count, edge_port->txCredits - fifo->count, copySize);
1087
1088         /* catch writes of 0 bytes which the tty driver likes to give us, and when txCredits is empty */
1089         if (copySize == 0) {
1090                 dbg("%s - copySize = Zero", __FUNCTION__);
1091                 goto finish_write;
1092         }
1093
1094         // queue the data
1095         // since we can never overflow the buffer we do not have to check for full condition
1096
1097         // the copy is done is two parts -- first fill to the end of the buffer
1098         // then copy the reset from the start of the buffer
1099
1100         bytesleft = fifo->size - fifo->head;
1101         firsthalf = min (bytesleft, copySize);
1102         dbg("%s - copy %d bytes of %d into fifo ", __FUNCTION__, firsthalf, bytesleft);
1103
1104         /* now copy our data */
1105         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1106         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, firsthalf, &fifo->fifo[fifo->head]);
1107
1108         // update the index and size
1109         fifo->head  += firsthalf;
1110         fifo->count += firsthalf;
1111
1112         // wrap the index
1113         if (fifo->head == fifo->size) {
1114                 fifo->head = 0;
1115         }
1116
1117         secondhalf = copySize-firsthalf;
1118
1119         if (secondhalf) {
1120                 dbg("%s - copy rest of data %d", __FUNCTION__, secondhalf);
1121                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1122                 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, secondhalf, &fifo->fifo[fifo->head]);
1123                 // update the index and size
1124                 fifo->count += secondhalf;
1125                 fifo->head  += secondhalf;
1126                 // No need to check for wrap since we can not get to end of fifo in this part
1127         }
1128
1129 finish_write:
1130         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1131
1132         send_more_port_data((struct edgeport_serial *)usb_get_serial_data(port->serial), edge_port);
1133
1134         dbg("%s wrote %d byte(s) TxCredits %d, Fifo %d", __FUNCTION__, copySize, edge_port->txCredits, fifo->count);
1135
1136         return copySize;
1137 }
1138
1139
1140 /************************************************************************
1141  *
1142  * send_more_port_data()
1143  *
1144  *      This routine attempts to write additional UART transmit data
1145  *      to a port over the USB bulk pipe. It is called (1) when new
1146  *      data has been written to a port's TxBuffer from higher layers
1147  *      (2) when the peripheral sends us additional TxCredits indicating
1148  *      that it can accept more Tx data for a given port; and (3) when
1149  *      a bulk write completes successfully and we want to see if we
1150  *      can transmit more.
1151  *
1152  ************************************************************************/
1153 static void send_more_port_data(struct edgeport_serial *edge_serial, struct edgeport_port *edge_port)
1154 {
1155         struct TxFifo   *fifo = &edge_port->txfifo;
1156         struct urb      *urb;
1157         unsigned char   *buffer;
1158         int             status;
1159         int             count;
1160         int             bytesleft;
1161         int             firsthalf;
1162         int             secondhalf;
1163         unsigned long   flags;
1164
1165         dbg("%s(%d)", __FUNCTION__, edge_port->port->number);
1166
1167         spin_lock_irqsave(&edge_port->ep_lock, flags);
1168
1169         if (edge_port->write_in_progress ||
1170             !edge_port->open             ||
1171             (fifo->count == 0)) {
1172                 dbg("%s(%d) EXIT - fifo %d, PendingWrite = %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->write_in_progress);
1173                 goto exit_send;
1174         }
1175
1176         // since the amount of data in the fifo will always fit into the
1177         // edgeport buffer we do not need to check the write length
1178
1179         //      Do we have enough credits for this port to make it worthwhile
1180         //      to bother queueing a write. If it's too small, say a few bytes,
1181         //      it's better to wait for more credits so we can do a larger
1182         //      write.
1183         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits,EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1184                 dbg("%s(%d) Not enough credit - fifo %d TxCredit %d", __FUNCTION__, edge_port->port->number, fifo->count, edge_port->txCredits );
1185                 goto exit_send;
1186         }
1187
1188         // lock this write
1189         edge_port->write_in_progress = TRUE;
1190
1191         // get a pointer to the write_urb
1192         urb = edge_port->write_urb;
1193
1194         /* make sure transfer buffer is freed */
1195         kfree(urb->transfer_buffer);
1196         urb->transfer_buffer = NULL;
1197
1198         /* build the data header for the buffer and port that we are about to send out */
1199         count = fifo->count;
1200         buffer = kmalloc (count+2, GFP_ATOMIC);
1201         if (buffer == NULL) {
1202                 dev_err(&edge_port->port->dev, "%s - no more kernel memory...\n", __FUNCTION__);
1203                 edge_port->write_in_progress = FALSE;
1204                 goto exit_send;
1205         }
1206         buffer[0] = IOSP_BUILD_DATA_HDR1 (edge_port->port->number - edge_port->port->serial->minor, count);
1207         buffer[1] = IOSP_BUILD_DATA_HDR2 (edge_port->port->number - edge_port->port->serial->minor, count);
1208
1209         /* now copy our data */
1210         bytesleft =  fifo->size - fifo->tail;
1211         firsthalf = min (bytesleft, count);
1212         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1213         fifo->tail  += firsthalf;
1214         fifo->count -= firsthalf;
1215         if (fifo->tail == fifo->size) {
1216                 fifo->tail = 0;
1217         }
1218
1219         secondhalf = count-firsthalf;
1220         if (secondhalf) {
1221                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail], secondhalf);
1222                 fifo->tail  += secondhalf;
1223                 fifo->count -= secondhalf;
1224         }
1225
1226         if (count)
1227                 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, count, &buffer[2]);
1228
1229         /* fill up the urb with all of our data and submit it */
1230         usb_fill_bulk_urb (urb, edge_serial->serial->dev,
1231                        usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
1232                        buffer, count+2, edge_bulk_out_data_callback, edge_port);
1233
1234         /* decrement the number of credits we have by the number we just sent */
1235         edge_port->txCredits -= count;
1236         edge_port->icount.tx += count;
1237
1238         urb->dev = edge_serial->serial->dev;
1239         status = usb_submit_urb(urb, GFP_ATOMIC);
1240         if (status) {
1241                 /* something went wrong */
1242                 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n", __FUNCTION__, status);
1243                 edge_port->write_in_progress = FALSE;
1244
1245                 /* revert the credits as something bad happened. */
1246                 edge_port->txCredits += count;
1247                 edge_port->icount.tx -= count;
1248         }
1249         dbg("%s wrote %d byte(s) TxCredit %d, Fifo %d", __FUNCTION__, count, edge_port->txCredits, fifo->count);
1250
1251 exit_send:
1252         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1253 }
1254
1255
1256 /*****************************************************************************
1257  * edge_write_room
1258  *      this function is called by the tty driver when it wants to know how many
1259  *      bytes of data we can accept for a specific port.
1260  *      If successful, we return the amount of room that we have for this port
1261  *      (the txCredits),
1262  *      Otherwise we return a negative error number.
1263  *****************************************************************************/
1264 static int edge_write_room (struct usb_serial_port *port)
1265 {
1266         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1267         int room;
1268         unsigned long flags;
1269
1270         dbg("%s", __FUNCTION__);
1271
1272         if (edge_port == NULL)
1273                 return -ENODEV;
1274         if (edge_port->closePending == TRUE)
1275                 return -ENODEV;
1276
1277         dbg("%s - port %d", __FUNCTION__, port->number);
1278
1279         if (!edge_port->open) {
1280                 dbg("%s - port not opened", __FUNCTION__);
1281                 return -EINVAL;
1282         }
1283
1284         // total of both buffers is still txCredit
1285         spin_lock_irqsave(&edge_port->ep_lock, flags);
1286         room = edge_port->txCredits - edge_port->txfifo.count;
1287         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1288
1289         dbg("%s - returns %d", __FUNCTION__, room);
1290         return room;
1291 }
1292
1293
1294 /*****************************************************************************
1295  * edge_chars_in_buffer
1296  *      this function is called by the tty driver when it wants to know how many
1297  *      bytes of data we currently have outstanding in the port (data that has
1298  *      been written, but hasn't made it out the port yet)
1299  *      If successful, we return the number of bytes left to be written in the
1300  *      system,
1301  *      Otherwise we return a negative error number.
1302  *****************************************************************************/
1303 static int edge_chars_in_buffer (struct usb_serial_port *port)
1304 {
1305         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1306         int num_chars;
1307         unsigned long flags;
1308
1309         dbg("%s", __FUNCTION__);
1310
1311         if (edge_port == NULL)
1312                 return -ENODEV;
1313         if (edge_port->closePending == TRUE)
1314                 return -ENODEV;
1315
1316         if (!edge_port->open) {
1317                 dbg("%s - port not opened", __FUNCTION__);
1318                 return -EINVAL;
1319         }
1320
1321         spin_lock_irqsave(&edge_port->ep_lock, flags);
1322         num_chars = edge_port->maxTxCredits - edge_port->txCredits + edge_port->txfifo.count;
1323         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1324         if (num_chars) {
1325                 dbg("%s(port %d) - returns %d", __FUNCTION__, port->number, num_chars);
1326         }
1327
1328         return num_chars;
1329 }
1330
1331
1332 /*****************************************************************************
1333  * SerialThrottle
1334  *      this function is called by the tty driver when it wants to stop the data
1335  *      being read from the port.
1336  *****************************************************************************/
1337 static void edge_throttle (struct usb_serial_port *port)
1338 {
1339         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1340         struct tty_struct *tty;
1341         int status;
1342
1343         dbg("%s - port %d", __FUNCTION__, port->number);
1344
1345         if (edge_port == NULL)
1346                 return;
1347
1348         if (!edge_port->open) {
1349                 dbg("%s - port not opened", __FUNCTION__);
1350                 return;
1351         }
1352
1353         tty = port->tty;
1354         if (!tty) {
1355                 dbg ("%s - no tty available", __FUNCTION__);
1356                 return;
1357         }
1358
1359         /* if we are implementing XON/XOFF, send the stop character */
1360         if (I_IXOFF(tty)) {
1361                 unsigned char stop_char = STOP_CHAR(tty);
1362                 status = edge_write (port, &stop_char, 1);
1363                 if (status <= 0) {
1364                         return;
1365                 }
1366         }
1367
1368         /* if we are implementing RTS/CTS, toggle that line */
1369         if (tty->termios->c_cflag & CRTSCTS) {
1370                 edge_port->shadowMCR &= ~MCR_RTS;
1371                 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1372                 if (status != 0) {
1373                         return;
1374                 }
1375         }
1376
1377         return;
1378 }
1379
1380
1381 /*****************************************************************************
1382  * edge_unthrottle
1383  *      this function is called by the tty driver when it wants to resume the data
1384  *      being read from the port (called after SerialThrottle is called)
1385  *****************************************************************************/
1386 static void edge_unthrottle (struct usb_serial_port *port)
1387 {
1388         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1389         struct tty_struct *tty;
1390         int status;
1391
1392         dbg("%s - port %d", __FUNCTION__, port->number);
1393
1394         if (edge_port == NULL)
1395                 return;
1396
1397         if (!edge_port->open) {
1398                 dbg("%s - port not opened", __FUNCTION__);
1399                 return;
1400         }
1401
1402         tty = port->tty;
1403         if (!tty) {
1404                 dbg ("%s - no tty available", __FUNCTION__);
1405                 return;
1406         }
1407
1408         /* if we are implementing XON/XOFF, send the start character */
1409         if (I_IXOFF(tty)) {
1410                 unsigned char start_char = START_CHAR(tty);
1411                 status = edge_write (port, &start_char, 1);
1412                 if (status <= 0) {
1413                         return;
1414                 }
1415         }
1416
1417         /* if we are implementing RTS/CTS, toggle that line */
1418         if (tty->termios->c_cflag & CRTSCTS) {
1419                 edge_port->shadowMCR |= MCR_RTS;
1420                 status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1421                 if (status != 0) {
1422                         return;
1423                 }
1424         }
1425
1426         return;
1427 }
1428
1429
1430 /*****************************************************************************
1431  * SerialSetTermios
1432  *      this function is called by the tty driver when it wants to change the termios structure
1433  *****************************************************************************/
1434 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
1435 {
1436         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1437         struct tty_struct *tty = port->tty;
1438         unsigned int cflag;
1439
1440         if (!port->tty || !port->tty->termios) {
1441                 dbg ("%s - no tty or termios", __FUNCTION__);
1442                 return;
1443         }
1444
1445         cflag = tty->termios->c_cflag;
1446         /* check that they really want us to change something */
1447         if (old_termios) {
1448                 if (cflag == old_termios->c_cflag &&
1449                     tty->termios->c_iflag == old_termios->c_iflag) {
1450                         dbg("%s - nothing to change", __FUNCTION__);
1451                         return;
1452                 }
1453         }
1454
1455         dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
1456             tty->termios->c_cflag, tty->termios->c_iflag);
1457         if (old_termios) {
1458                 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
1459                     old_termios->c_cflag, old_termios->c_iflag);
1460         }
1461
1462         dbg("%s - port %d", __FUNCTION__, port->number);
1463
1464         if (edge_port == NULL)
1465                 return;
1466
1467         if (!edge_port->open) {
1468                 dbg("%s - port not opened", __FUNCTION__);
1469                 return;
1470         }
1471
1472         /* change the port settings to the new ones specified */
1473         change_port_settings (edge_port, old_termios);
1474
1475         return;
1476 }
1477
1478
1479 /*****************************************************************************
1480  * get_lsr_info - get line status register info
1481  *
1482  * Purpose: Let user call ioctl() to get info when the UART physically
1483  *          is emptied.  On bus types like RS485, the transmitter must
1484  *          release the bus after transmitting. This must be done when
1485  *          the transmit shift register is empty, not be done when the
1486  *          transmit holding register is empty.  This functionality
1487  *          allows an RS485 driver to be written in user space.
1488  *****************************************************************************/
1489 static int get_lsr_info(struct edgeport_port *edge_port, unsigned int __user *value)
1490 {
1491         unsigned int result = 0;
1492         unsigned long flags;
1493
1494         spin_lock_irqsave(&edge_port->ep_lock, flags);
1495         if (edge_port->maxTxCredits == edge_port->txCredits &&
1496             edge_port->txfifo.count == 0) {
1497                 dbg("%s -- Empty", __FUNCTION__);
1498                 result = TIOCSER_TEMT;
1499         }
1500         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1501
1502         if (copy_to_user(value, &result, sizeof(int)))
1503                 return -EFAULT;
1504         return 0;
1505 }
1506
1507 static int get_number_bytes_avail(struct edgeport_port *edge_port, unsigned int __user *value)
1508 {
1509         unsigned int result = 0;
1510         struct tty_struct *tty = edge_port->port->tty;
1511
1512         if (!tty)
1513                 return -ENOIOCTLCMD;
1514
1515         result = tty->read_cnt;
1516
1517         dbg("%s(%d) = %d", __FUNCTION__,  edge_port->port->number, result);
1518         if (copy_to_user(value, &result, sizeof(int)))
1519                 return -EFAULT;
1520         //return 0;
1521         return -ENOIOCTLCMD;
1522 }
1523
1524 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
1525 {
1526         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1527         unsigned int mcr;
1528
1529         dbg("%s - port %d", __FUNCTION__, port->number);
1530
1531         mcr = edge_port->shadowMCR;
1532         if (set & TIOCM_RTS)
1533                 mcr |= MCR_RTS;
1534         if (set & TIOCM_DTR)
1535                 mcr |= MCR_DTR;
1536         if (set & TIOCM_LOOP)
1537                 mcr |= MCR_LOOPBACK;
1538
1539         if (clear & TIOCM_RTS)
1540                 mcr &= ~MCR_RTS;
1541         if (clear & TIOCM_DTR)
1542                 mcr &= ~MCR_DTR;
1543         if (clear & TIOCM_LOOP)
1544                 mcr &= ~MCR_LOOPBACK;
1545
1546         edge_port->shadowMCR = mcr;
1547
1548         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1549
1550         return 0;
1551 }
1552
1553 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
1554 {
1555         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1556         unsigned int result = 0;
1557         unsigned int msr;
1558         unsigned int mcr;
1559
1560         dbg("%s - port %d", __FUNCTION__, port->number);
1561
1562         msr = edge_port->shadowMSR;
1563         mcr = edge_port->shadowMCR;
1564         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1565                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1566                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1567                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1568                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1569                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1570
1571
1572         dbg("%s -- %x", __FUNCTION__, result);
1573
1574         return result;
1575 }
1576
1577 static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
1578 {
1579         struct serial_struct tmp;
1580
1581         if (!retinfo)
1582                 return -EFAULT;
1583
1584         memset(&tmp, 0, sizeof(tmp));
1585
1586         tmp.type                = PORT_16550A;
1587         tmp.line                = edge_port->port->serial->minor;
1588         tmp.port                = edge_port->port->number;
1589         tmp.irq                 = 0;
1590         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
1591         tmp.xmit_fifo_size      = edge_port->maxTxCredits;
1592         tmp.baud_base           = 9600;
1593         tmp.close_delay         = 5*HZ;
1594         tmp.closing_wait        = 30*HZ;
1595 //      tmp.custom_divisor      = state->custom_divisor;
1596 //      tmp.hub6                = state->hub6;
1597 //      tmp.io_type             = state->io_type;
1598
1599         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1600                 return -EFAULT;
1601         return 0;
1602 }
1603
1604
1605
1606 /*****************************************************************************
1607  * SerialIoctl
1608  *      this function handles any ioctl calls to the driver
1609  *****************************************************************************/
1610 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
1611 {
1612         DEFINE_WAIT(wait);
1613         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1614         struct async_icount cnow;
1615         struct async_icount cprev;
1616         struct serial_icounter_struct icount;
1617
1618         dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
1619
1620         switch (cmd) {
1621                 // return number of bytes available
1622                 case TIOCINQ:
1623                         dbg("%s (%d) TIOCINQ", __FUNCTION__,  port->number);
1624                         return get_number_bytes_avail(edge_port, (unsigned int __user *) arg);
1625                         break;
1626
1627                 case TIOCSERGETLSR:
1628                         dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__,  port->number);
1629                         return get_lsr_info(edge_port, (unsigned int __user *) arg);
1630                         return 0;
1631
1632                 case TIOCGSERIAL:
1633                         dbg("%s (%d) TIOCGSERIAL", __FUNCTION__,  port->number);
1634                         return get_serial_info(edge_port, (struct serial_struct __user *) arg);
1635
1636                 case TIOCSSERIAL:
1637                         dbg("%s (%d) TIOCSSERIAL", __FUNCTION__,  port->number);
1638                         break;
1639
1640                 case TIOCMIWAIT:
1641                         dbg("%s (%d) TIOCMIWAIT", __FUNCTION__,  port->number);
1642                         cprev = edge_port->icount;
1643                         while (1) {
1644                                 prepare_to_wait(&edge_port->delta_msr_wait, &wait, TASK_INTERRUPTIBLE);
1645                                 schedule();
1646                                 finish_wait(&edge_port->delta_msr_wait, &wait);
1647                                 /* see if a signal did it */
1648                                 if (signal_pending(current))
1649                                         return -ERESTARTSYS;
1650                                 cnow = edge_port->icount;
1651                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
1652                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
1653                                         return -EIO; /* no change => error */
1654                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1655                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1656                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
1657                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
1658                                         return 0;
1659                                 }
1660                                 cprev = cnow;
1661                         }
1662                         /* NOTREACHED */
1663                         break;
1664
1665                 case TIOCGICOUNT:
1666                         cnow = edge_port->icount;
1667                         memset(&icount, 0, sizeof(icount));
1668                         icount.cts = cnow.cts;
1669                         icount.dsr = cnow.dsr;
1670                         icount.rng = cnow.rng;
1671                         icount.dcd = cnow.dcd;
1672                         icount.rx = cnow.rx;
1673                         icount.tx = cnow.tx;
1674                         icount.frame = cnow.frame;
1675                         icount.overrun = cnow.overrun;
1676                         icount.parity = cnow.parity;
1677                         icount.brk = cnow.brk;
1678                         icount.buf_overrun = cnow.buf_overrun;
1679
1680                         dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,  port->number, icount.rx, icount.tx );
1681                         if (copy_to_user((void __user *)arg, &icount, sizeof(icount)))
1682                                 return -EFAULT;
1683                         return 0;
1684         }
1685
1686         return -ENOIOCTLCMD;
1687 }
1688
1689
1690 /*****************************************************************************
1691  * SerialBreak
1692  *      this function sends a break to the port
1693  *****************************************************************************/
1694 static void edge_break (struct usb_serial_port *port, int break_state)
1695 {
1696         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1697         int status;
1698
1699         /* flush and chase */
1700         edge_port->chaseResponsePending = TRUE;
1701
1702         dbg("%s - Sending IOSP_CMD_CHASE_PORT", __FUNCTION__);
1703         status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CHASE_PORT, 0);
1704         if (status == 0) {
1705                 // block until chase finished
1706                 block_until_chase_response(edge_port);
1707         } else {
1708                 edge_port->chaseResponsePending = FALSE;
1709         }
1710
1711         if (break_state == -1) {
1712                 dbg("%s - Sending IOSP_CMD_SET_BREAK", __FUNCTION__);
1713                 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_BREAK, 0);
1714         } else {
1715                 dbg("%s - Sending IOSP_CMD_CLEAR_BREAK", __FUNCTION__);
1716                 status = send_iosp_ext_cmd (edge_port, IOSP_CMD_CLEAR_BREAK, 0);
1717         }
1718         if (status) {
1719                 dbg("%s - error sending break set/clear command.", __FUNCTION__);
1720         }
1721
1722         return;
1723 }
1724
1725
1726 /*****************************************************************************
1727  * process_rcvd_data
1728  *      this function handles the data received on the bulk in pipe.
1729  *****************************************************************************/
1730 static void process_rcvd_data (struct edgeport_serial *edge_serial, unsigned char * buffer, __u16 bufferLength)
1731 {
1732         struct usb_serial_port *port;
1733         struct edgeport_port *edge_port;
1734         struct tty_struct *tty;
1735         __u16 lastBufferLength;
1736         __u16 rxLen;
1737
1738         dbg("%s", __FUNCTION__);
1739
1740         lastBufferLength = bufferLength + 1;
1741
1742         while (bufferLength > 0) {
1743                 /* failsafe incase we get a message that we don't understand */
1744                 if (lastBufferLength == bufferLength) {
1745                         dbg("%s - stuck in loop, exiting it.", __FUNCTION__);
1746                         break;
1747                 }
1748                 lastBufferLength = bufferLength;
1749
1750                 switch (edge_serial->rxState) {
1751                         case EXPECT_HDR1:
1752                                 edge_serial->rxHeader1 = *buffer;
1753                                 ++buffer;
1754                                 --bufferLength;
1755
1756                                 if (bufferLength == 0) {
1757                                         edge_serial->rxState = EXPECT_HDR2;
1758                                         break;
1759                                 }
1760                                 /* otherwise, drop on through */
1761
1762                         case EXPECT_HDR2:
1763                                 edge_serial->rxHeader2 = *buffer;
1764                                 ++buffer;
1765                                 --bufferLength;
1766
1767                                 dbg("%s - Hdr1=%02X Hdr2=%02X", __FUNCTION__, edge_serial->rxHeader1, edge_serial->rxHeader2);
1768
1769                                 // Process depending on whether this header is
1770                                 // data or status
1771
1772                                 if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1773                                         // Decode this status header and goto EXPECT_HDR1 (if we
1774                                         // can process the status with only 2 bytes), or goto
1775                                         // EXPECT_HDR3 to get the third byte.
1776
1777                                         edge_serial->rxPort       = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1778                                         edge_serial->rxStatusCode = IOSP_GET_STATUS_CODE(edge_serial->rxHeader1);
1779
1780                                         if (!IOSP_STATUS_IS_2BYTE(edge_serial->rxStatusCode)) {
1781                                                 // This status needs additional bytes. Save what we have
1782                                                 // and then wait for more data.
1783                                                 edge_serial->rxStatusParam = edge_serial->rxHeader2;
1784
1785                                                 edge_serial->rxState = EXPECT_HDR3;
1786                                                 break;
1787                                         }
1788
1789                                         // We have all the header bytes, process the status now
1790                                         process_rcvd_status (edge_serial, edge_serial->rxHeader2, 0);
1791                                         edge_serial->rxState = EXPECT_HDR1;
1792                                         break;
1793                                 } else {
1794                                         edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1795                                         edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1, edge_serial->rxHeader2);
1796
1797                                         dbg("%s - Data for Port %u Len %u", __FUNCTION__, edge_serial->rxPort, edge_serial->rxBytesRemaining);
1798
1799                                         //ASSERT( DevExt->RxPort < DevExt->NumPorts );
1800                                         //ASSERT( DevExt->RxBytesRemaining < IOSP_MAX_DATA_LENGTH );
1801
1802                                         if (bufferLength == 0 ) {
1803                                                 edge_serial->rxState = EXPECT_DATA;
1804                                                 break;
1805                                         }
1806                                         // Else, drop through
1807                                 }
1808
1809                         case EXPECT_DATA:       // Expect data
1810
1811                                 if (bufferLength < edge_serial->rxBytesRemaining) {
1812                                         rxLen = bufferLength;
1813                                         edge_serial->rxState = EXPECT_DATA;     // Expect data to start next buffer
1814                                 } else {
1815                                         // BufLen >= RxBytesRemaining
1816                                         rxLen = edge_serial->rxBytesRemaining;
1817                                         edge_serial->rxState = EXPECT_HDR1;     // Start another header next time
1818                                 }
1819
1820                                 bufferLength -= rxLen;
1821                                 edge_serial->rxBytesRemaining -= rxLen;
1822
1823                                 /* spit this data back into the tty driver if this port is open */
1824                                 if (rxLen) {
1825                                         port = edge_serial->serial->port[edge_serial->rxPort];
1826                                         edge_port = usb_get_serial_port_data(port);
1827                                         if (edge_port->open) {
1828                                                 tty = edge_port->port->tty;
1829                                                 if (tty) {
1830                                                         dbg("%s - Sending %d bytes to TTY for port %d", __FUNCTION__, rxLen, edge_serial->rxPort);
1831                                                         edge_tty_recv(&edge_serial->serial->dev->dev, tty, buffer, rxLen);
1832                                                 }
1833                                                 edge_port->icount.rx += rxLen;
1834                                         }
1835                                         buffer += rxLen;
1836                                 }
1837
1838                                 break;
1839
1840                         case EXPECT_HDR3:                       // Expect 3rd byte of status header
1841                                 edge_serial->rxHeader3 = *buffer;
1842                                 ++buffer;
1843                                 --bufferLength;
1844
1845                                 // We have all the header bytes, process the status now
1846                                 process_rcvd_status (edge_serial, edge_serial->rxStatusParam, edge_serial->rxHeader3);
1847                                 edge_serial->rxState = EXPECT_HDR1;
1848                                 break;
1849
1850                 }
1851         }
1852 }
1853
1854
1855 /*****************************************************************************
1856  * process_rcvd_status
1857  *      this function handles the any status messages received on the bulk in pipe.
1858  *****************************************************************************/
1859 static void process_rcvd_status (struct edgeport_serial *edge_serial, __u8 byte2, __u8 byte3)
1860 {
1861         struct usb_serial_port *port;
1862         struct edgeport_port *edge_port;
1863         __u8 code = edge_serial->rxStatusCode;
1864
1865         /* switch the port pointer to the one being currently talked about */
1866         port = edge_serial->serial->port[edge_serial->rxPort];
1867         edge_port = usb_get_serial_port_data(port);
1868         if (edge_port == NULL) {
1869                 dev_err(&edge_serial->serial->dev->dev, "%s - edge_port == NULL for port %d\n", __FUNCTION__, edge_serial->rxPort);
1870                 return;
1871         }
1872
1873         dbg("%s - port %d", __FUNCTION__, edge_serial->rxPort);
1874
1875         if (code == IOSP_EXT_STATUS) {
1876                 switch (byte2) {
1877                         case IOSP_EXT_STATUS_CHASE_RSP:
1878                                 // we want to do EXT status regardless of port open/closed
1879                                 dbg("%s - Port %u EXT CHASE_RSP Data = %02x", __FUNCTION__, edge_serial->rxPort, byte3 );
1880                                 // Currently, the only EXT_STATUS is Chase, so process here instead of one more call
1881                                 // to one more subroutine. If/when more EXT_STATUS, there'll be more work to do.
1882                                 // Also, we currently clear flag and close the port regardless of content of above's Byte3.
1883                                 // We could choose to do something else when Byte3 says Timeout on Chase from Edgeport,
1884                                 // like wait longer in block_until_chase_response, but for now we don't.
1885                                 edge_port->chaseResponsePending = FALSE;
1886                                 wake_up (&edge_port->wait_chase);
1887                                 return;
1888
1889                         case IOSP_EXT_STATUS_RX_CHECK_RSP:
1890                                 dbg("%s ========== Port %u CHECK_RSP Sequence = %02x =============\n", __FUNCTION__, edge_serial->rxPort, byte3 );
1891                                 //Port->RxCheckRsp = TRUE;
1892                                 return;
1893                 }
1894         }
1895
1896         if (code == IOSP_STATUS_OPEN_RSP) {
1897                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1898                 edge_port->maxTxCredits = edge_port->txCredits;
1899                 dbg("%s - Port %u Open Response Inital MSR = %02x TxBufferSize = %d", __FUNCTION__, edge_serial->rxPort, byte2, edge_port->txCredits);
1900                 handle_new_msr (edge_port, byte2);
1901
1902                 /* send the current line settings to the port so we are in sync with any further termios calls */
1903                 if (edge_port->port->tty)
1904                         change_port_settings (edge_port, edge_port->port->tty->termios);
1905
1906                 /* we have completed the open */
1907                 edge_port->openPending = FALSE;
1908                 edge_port->open = TRUE;
1909                 wake_up(&edge_port->wait_open);
1910                 return;
1911         }
1912
1913         // If port is closed, silently discard all rcvd status. We can
1914         // have cases where buffered status is received AFTER the close
1915         // port command is sent to the Edgeport.
1916         if ((!edge_port->open ) || (edge_port->closePending)) {
1917                 return;
1918         }
1919
1920         switch (code) {
1921                 // Not currently sent by Edgeport
1922                 case IOSP_STATUS_LSR:
1923                         dbg("%s - Port %u LSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
1924                         handle_new_lsr (edge_port, FALSE, byte2, 0);
1925                         break;
1926
1927                 case IOSP_STATUS_LSR_DATA:
1928                         dbg("%s - Port %u LSR Status = %02x, Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
1929                         // byte2 is LSR Register
1930                         // byte3 is broken data byte
1931                         handle_new_lsr (edge_port, TRUE, byte2, byte3);
1932                         break;
1933                         //
1934                         //      case IOSP_EXT_4_STATUS:
1935                         //              dbg("%s - Port %u LSR Status = %02x Data = %02x", __FUNCTION__, edge_serial->rxPort, byte2, byte3);
1936                         //              break;
1937                         //
1938                 case IOSP_STATUS_MSR:
1939                         dbg("%s - Port %u MSR Status = %02x", __FUNCTION__, edge_serial->rxPort, byte2);
1940
1941                         // Process this new modem status and generate appropriate
1942                         // events, etc, based on the new status. This routine
1943                         // also saves the MSR in Port->ShadowMsr.
1944                         handle_new_msr(edge_port, byte2);
1945                         break;
1946
1947                 default:
1948                         dbg("%s - Unrecognized IOSP status code %u\n", __FUNCTION__, code);
1949                         break;
1950         }
1951
1952         return;
1953 }
1954
1955
1956 /*****************************************************************************
1957  * edge_tty_recv
1958  *      this function passes data on to the tty flip buffer
1959  *****************************************************************************/
1960 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
1961 {
1962         int cnt;
1963
1964         do {
1965                 cnt = tty_buffer_request_room(tty, length);
1966                 if (cnt < length) {
1967                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1968                                         __FUNCTION__, length - cnt);
1969                         if(cnt == 0)
1970                                 break;
1971                 }
1972                 tty_insert_flip_string(tty, data, cnt);
1973                 data += cnt;
1974                 length -= cnt;
1975         } while (length > 0);
1976
1977         tty_flip_buffer_push(tty);
1978 }
1979
1980
1981 /*****************************************************************************
1982  * handle_new_msr
1983  *      this function handles any change to the msr register for a port.
1984  *****************************************************************************/
1985 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1986 {
1987         struct  async_icount *icount;
1988
1989         dbg("%s %02x", __FUNCTION__, newMsr);
1990
1991         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1992                 icount = &edge_port->icount;
1993
1994                 /* update input line counters */
1995                 if (newMsr & EDGEPORT_MSR_DELTA_CTS) {
1996                         icount->cts++;
1997                 }
1998                 if (newMsr & EDGEPORT_MSR_DELTA_DSR) {
1999                         icount->dsr++;
2000                 }
2001                 if (newMsr & EDGEPORT_MSR_DELTA_CD) {
2002                         icount->dcd++;
2003                 }
2004                 if (newMsr & EDGEPORT_MSR_DELTA_RI) {
2005                         icount->rng++;
2006                 }
2007                 wake_up_interruptible(&edge_port->delta_msr_wait);
2008         }
2009
2010         /* Save the new modem status */
2011         edge_port->shadowMSR = newMsr & 0xf0;
2012
2013         return;
2014 }
2015
2016
2017 /*****************************************************************************
2018  * handle_new_lsr
2019  *      this function handles any change to the lsr register for a port.
2020  *****************************************************************************/
2021 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData, __u8 lsr, __u8 data)
2022 {
2023         __u8    newLsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
2024         struct  async_icount *icount;
2025
2026         dbg("%s - %02x", __FUNCTION__, newLsr);
2027
2028         edge_port->shadowLSR = lsr;
2029
2030         if (newLsr & LSR_BREAK) {
2031                 //
2032                 // Parity and Framing errors only count if they
2033                 // occur exclusive of a break being
2034                 // received.
2035                 //
2036                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
2037         }
2038
2039         /* Place LSR data byte into Rx buffer */
2040         if (lsrData && edge_port->port->tty)
2041                 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
2042
2043         /* update input line counters */
2044         icount = &edge_port->icount;
2045         if (newLsr & LSR_BREAK) {
2046                 icount->brk++;
2047         }
2048         if (newLsr & LSR_OVER_ERR) {
2049                 icount->overrun++;
2050         }
2051         if (newLsr & LSR_PAR_ERR) {
2052                 icount->parity++;
2053         }
2054         if (newLsr & LSR_FRM_ERR) {
2055                 icount->frame++;
2056         }
2057
2058         return;
2059 }
2060
2061
2062 /****************************************************************************
2063  * sram_write
2064  *      writes a number of bytes to the Edgeport device's sram starting at the
2065  *      given address.
2066  *      If successful returns the number of bytes written, otherwise it returns
2067  *      a negative error number of the problem.
2068  ****************************************************************************/
2069 static int sram_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2070 {
2071         int result;
2072         __u16 current_length;
2073         unsigned char *transfer_buffer;
2074
2075         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2076
2077         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2078         if (!transfer_buffer) {
2079                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2080                 return -ENOMEM;
2081         }
2082
2083         /* need to split these writes up into 64 byte chunks */
2084         result = 0;
2085         while (length > 0) {
2086                 if (length > 64) {
2087                         current_length = 64;
2088                 } else {
2089                         current_length = length;
2090                 }
2091 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2092                 memcpy (transfer_buffer, data, current_length);
2093                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_RAM,
2094                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2095                 if (result < 0)
2096                         break;
2097                 length -= current_length;
2098                 addr += current_length;
2099                 data += current_length;
2100         }
2101
2102         kfree (transfer_buffer);
2103         return result;
2104 }
2105
2106
2107 /****************************************************************************
2108  * rom_write
2109  *      writes a number of bytes to the Edgeport device's ROM starting at the
2110  *      given address.
2111  *      If successful returns the number of bytes written, otherwise it returns
2112  *      a negative error number of the problem.
2113  ****************************************************************************/
2114 static int rom_write (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2115 {
2116         int result;
2117         __u16 current_length;
2118         unsigned char *transfer_buffer;
2119
2120 //      dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2121
2122         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2123         if (!transfer_buffer) {
2124                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2125                 return -ENOMEM;
2126         }
2127
2128         /* need to split these writes up into 64 byte chunks */
2129         result = 0;
2130         while (length > 0) {
2131                 if (length > 64) {
2132                         current_length = 64;
2133                 } else {
2134                         current_length = length;
2135                 }
2136 //              dbg("%s - writing %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2137                 memcpy (transfer_buffer, data, current_length);
2138                 result = usb_control_msg (serial->dev, usb_sndctrlpipe(serial->dev, 0), USB_REQUEST_ION_WRITE_ROM,
2139                                           0x40, addr, extAddr, transfer_buffer, current_length, 300);
2140                 if (result < 0)
2141                         break;
2142                 length -= current_length;
2143                 addr += current_length;
2144                 data += current_length;
2145         }
2146
2147         kfree (transfer_buffer);
2148         return result;
2149 }
2150
2151
2152 /****************************************************************************
2153  * rom_read
2154  *      reads a number of bytes from the Edgeport device starting at the given
2155  *      address.
2156  *      If successful returns the number of bytes read, otherwise it returns
2157  *      a negative error number of the problem.
2158  ****************************************************************************/
2159 static int rom_read (struct usb_serial *serial, __u16 extAddr, __u16 addr, __u16 length, __u8 *data)
2160 {
2161         int result;
2162         __u16 current_length;
2163         unsigned char *transfer_buffer;
2164
2165         dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, length);
2166
2167         transfer_buffer =  kmalloc (64, GFP_KERNEL);
2168         if (!transfer_buffer) {
2169                 dev_err(&serial->dev->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 64);
2170                 return -ENOMEM;
2171         }
2172
2173         /* need to split these reads up into 64 byte chunks */
2174         result = 0;
2175         while (length > 0) {
2176                 if (length > 64) {
2177                         current_length = 64;
2178                 } else {
2179                         current_length = length;
2180                 }
2181 //              dbg("%s - %x, %x, %d", __FUNCTION__, extAddr, addr, current_length);
2182                 result = usb_control_msg (serial->dev, usb_rcvctrlpipe(serial->dev, 0), USB_REQUEST_ION_READ_ROM,
2183                                           0xC0, addr, extAddr, transfer_buffer, current_length, 300);
2184                 if (result < 0)
2185                         break;
2186                 memcpy (data, transfer_buffer, current_length);
2187                 length -= current_length;
2188                 addr += current_length;
2189                 data += current_length;
2190         }
2191
2192         kfree (transfer_buffer);
2193         return result;
2194 }
2195
2196
2197 /****************************************************************************
2198  * send_iosp_ext_cmd
2199  *      Is used to send a IOSP message to the Edgeport device
2200  ****************************************************************************/
2201 static int send_iosp_ext_cmd (struct edgeport_port *edge_port, __u8 command, __u8 param)
2202 {
2203         unsigned char   *buffer;
2204         unsigned char   *currentCommand;
2205         int             length = 0;
2206         int             status = 0;
2207
2208         dbg("%s - %d, %d", __FUNCTION__, command, param);
2209
2210         buffer =  kmalloc (10, GFP_ATOMIC);
2211         if (!buffer) {
2212                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 10);
2213                 return -ENOMEM;
2214         }
2215
2216         currentCommand = buffer;
2217
2218         MAKE_CMD_EXT_CMD (&currentCommand, &length,
2219                           edge_port->port->number - edge_port->port->serial->minor,
2220                           command, param);
2221
2222         status = write_cmd_usb (edge_port, buffer, length);
2223         if (status) {
2224                 /* something bad happened, let's free up the memory */
2225                 kfree(buffer);
2226         }
2227
2228         return status;
2229 }
2230
2231
2232 /*****************************************************************************
2233  * write_cmd_usb
2234  *      this function writes the given buffer out to the bulk write endpoint.
2235  *****************************************************************************/
2236 static int write_cmd_usb (struct edgeport_port *edge_port, unsigned char *buffer, int length)
2237 {
2238         struct edgeport_serial *edge_serial = usb_get_serial_data(edge_port->port->serial);
2239         int status = 0;
2240         struct urb *urb;
2241         int timeout;
2242
2243         usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, length, buffer);
2244
2245         /* Allocate our next urb */
2246         urb = usb_alloc_urb (0, GFP_ATOMIC);
2247         if (!urb)
2248                 return -ENOMEM;
2249
2250         CmdUrbs++;
2251         dbg("%s - ALLOCATE URB %p (outstanding %d)", __FUNCTION__, urb, CmdUrbs);
2252
2253         usb_fill_bulk_urb (urb, edge_serial->serial->dev,
2254                        usb_sndbulkpipe(edge_serial->serial->dev, edge_serial->bulk_out_endpoint),
2255                        buffer, length, edge_bulk_out_cmd_callback, edge_port);
2256
2257         edge_port->commandPending = TRUE;
2258         status = usb_submit_urb(urb, GFP_ATOMIC);
2259
2260         if (status) {
2261                 /* something went wrong */
2262                 dev_err(&edge_port->port->dev, "%s - usb_submit_urb(write command) failed, status = %d\n", __FUNCTION__, status);
2263                 usb_kill_urb(urb);
2264                 usb_free_urb(urb);
2265                 CmdUrbs--;
2266                 return status;
2267         }
2268
2269         // wait for command to finish
2270         timeout = COMMAND_TIMEOUT;
2271 #if 0
2272         wait_event (&edge_port->wait_command, (edge_port->commandPending == FALSE));
2273
2274         if (edge_port->commandPending == TRUE) {
2275                 /* command timed out */
2276                 dbg("%s - command timed out", __FUNCTION__);
2277                 status = -EINVAL;
2278         }
2279 #endif
2280         return status;
2281 }
2282
2283
2284 /*****************************************************************************
2285  * send_cmd_write_baud_rate
2286  *      this function sends the proper command to change the baud rate of the
2287  *      specified port.
2288  *****************************************************************************/
2289 static int send_cmd_write_baud_rate (struct edgeport_port *edge_port, int baudRate)
2290 {
2291         unsigned char *cmdBuffer;
2292         unsigned char *currCmd;
2293         int cmdLen = 0;
2294         int divisor;
2295         int status;
2296         unsigned char number = edge_port->port->number - edge_port->port->serial->minor;
2297
2298         dbg("%s - port = %d, baud = %d", __FUNCTION__, edge_port->port->number, baudRate);
2299
2300         status = calc_baud_rate_divisor (baudRate, &divisor);
2301         if (status) {
2302                 dev_err(&edge_port->port->dev, "%s - bad baud rate\n", __FUNCTION__);
2303                 return status;
2304         }
2305
2306         // Alloc memory for the string of commands.
2307         cmdBuffer =  kmalloc (0x100, GFP_ATOMIC);
2308         if (!cmdBuffer) {
2309                 dev_err(&edge_port->port->dev, "%s - kmalloc(%d) failed.\n", __FUNCTION__, 0x100);
2310                 return -ENOMEM;
2311         }
2312         currCmd = cmdBuffer;
2313
2314         // Enable access to divisor latch
2315         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE );
2316
2317         // Write the divisor itself
2318         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLL, LOW8 (divisor) );
2319         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, DLM, HIGH8(divisor) );
2320
2321         // Restore original value to disable access to divisor latch
2322         MAKE_CMD_WRITE_REG( &currCmd, &cmdLen, number, LCR, edge_port->shadowLCR);
2323
2324         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen );
2325         if (status) {
2326                 /* something bad happened, let's free up the memory */
2327                 kfree (cmdBuffer);
2328         }
2329
2330         return status;
2331 }
2332
2333
2334 /*****************************************************************************
2335  * calc_baud_rate_divisor
2336  *      this function calculates the proper baud rate divisor for the specified
2337  *      baud rate.
2338  *****************************************************************************/
2339 static int calc_baud_rate_divisor (int baudrate, int *divisor)
2340 {
2341         int i;
2342         __u16 custom;
2343
2344
2345         dbg("%s - %d", __FUNCTION__, baudrate);
2346
2347         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2348                 if ( divisor_table[i].BaudRate == baudrate ) {
2349                         *divisor = divisor_table[i].Divisor;
2350                         return 0;
2351                 }
2352         }
2353
2354         // We have tried all of the standard baud rates
2355         // lets try to calculate the divisor for this baud rate
2356         // Make sure the baud rate is reasonable
2357         if (baudrate > 50 && baudrate < 230400) {
2358                 // get divisor
2359                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2360
2361                 *divisor = custom;
2362
2363                 dbg("%s - Baud %d = %d\n", __FUNCTION__, baudrate, custom);
2364                 return 0;
2365         }
2366
2367         return -1;
2368 }
2369
2370
2371 /*****************************************************************************
2372  * send_cmd_write_uart_register
2373  *      this function builds up a uart register message and sends to to the device.
2374  *****************************************************************************/
2375 static int send_cmd_write_uart_register (struct edgeport_port *edge_port, __u8 regNum, __u8 regValue)
2376 {
2377         unsigned char *cmdBuffer;
2378         unsigned char *currCmd;
2379         unsigned long cmdLen = 0;
2380         int status;
2381
2382         dbg("%s - write to %s register 0x%02x", (regNum == MCR) ? "MCR" : "LCR", __FUNCTION__, regValue);
2383
2384         // Alloc memory for the string of commands.
2385         cmdBuffer = kmalloc (0x10, GFP_ATOMIC);
2386         if (cmdBuffer == NULL ) {
2387                 return -ENOMEM;
2388         }
2389
2390         currCmd = cmdBuffer;
2391
2392         // Build a cmd in the buffer to write the given register
2393         MAKE_CMD_WRITE_REG (&currCmd, &cmdLen,
2394                             edge_port->port->number - edge_port->port->serial->minor,
2395                             regNum, regValue);
2396
2397         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2398         if (status) {
2399                 /* something bad happened, let's free up the memory */
2400                 kfree (cmdBuffer);
2401         }
2402
2403         return status;
2404 }
2405
2406
2407 /*****************************************************************************
2408  * change_port_settings
2409  *      This routine is called to set the UART on the device to match the specified
2410  *      new settings.
2411  *****************************************************************************/
2412 #ifndef CMSPAR
2413 #define CMSPAR 0
2414 #endif
2415 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
2416 {
2417         struct tty_struct *tty;
2418         int baud;
2419         unsigned cflag;
2420         __u8 mask = 0xff;
2421         __u8 lData;
2422         __u8 lParity;
2423         __u8 lStop;
2424         __u8 rxFlow;
2425         __u8 txFlow;
2426         int status;
2427
2428         dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2429
2430         if ((!edge_port->open) &&
2431             (!edge_port->openPending)) {
2432                 dbg("%s - port not opened", __FUNCTION__);
2433                 return;
2434         }
2435
2436         tty = edge_port->port->tty;
2437         if ((!tty) ||
2438             (!tty->termios)) {
2439                 dbg("%s - no tty structures", __FUNCTION__);
2440                 return;
2441         }
2442
2443         cflag = tty->termios->c_cflag;
2444
2445         switch (cflag & CSIZE) {
2446                 case CS5:   lData = LCR_BITS_5; mask = 0x1f;    dbg("%s - data bits = 5", __FUNCTION__);   break;
2447                 case CS6:   lData = LCR_BITS_6; mask = 0x3f;    dbg("%s - data bits = 6", __FUNCTION__);   break;
2448                 case CS7:   lData = LCR_BITS_7; mask = 0x7f;    dbg("%s - data bits = 7", __FUNCTION__);   break;
2449                 default:
2450                 case CS8:   lData = LCR_BITS_8;                 dbg("%s - data bits = 8", __FUNCTION__);   break;
2451         }
2452
2453         lParity = LCR_PAR_NONE;
2454         if (cflag & PARENB) {
2455                 if (cflag & CMSPAR) {
2456                         if (cflag & PARODD) {
2457                                 lParity = LCR_PAR_MARK;
2458                                 dbg("%s - parity = mark", __FUNCTION__);
2459                         } else {
2460                                 lParity = LCR_PAR_SPACE;
2461                                 dbg("%s - parity = space", __FUNCTION__);
2462                         }
2463                 } else if (cflag & PARODD) {
2464                         lParity = LCR_PAR_ODD;
2465                         dbg("%s - parity = odd", __FUNCTION__);
2466                 } else {
2467                         lParity = LCR_PAR_EVEN;
2468                         dbg("%s - parity = even", __FUNCTION__);
2469                 }
2470         } else {
2471                 dbg("%s - parity = none", __FUNCTION__);
2472         }
2473
2474         if (cflag & CSTOPB) {
2475                 lStop = LCR_STOP_2;
2476                 dbg("%s - stop bits = 2", __FUNCTION__);
2477         } else {
2478                 lStop = LCR_STOP_1;
2479                 dbg("%s - stop bits = 1", __FUNCTION__);
2480         }
2481
2482         /* figure out the flow control settings */
2483         rxFlow = txFlow = 0x00;
2484         if (cflag & CRTSCTS) {
2485                 rxFlow |= IOSP_RX_FLOW_RTS;
2486                 txFlow |= IOSP_TX_FLOW_CTS;
2487                 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2488         } else {
2489                 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2490         }
2491
2492         /* if we are implementing XON/XOFF, set the start and stop character in the device */
2493         if (I_IXOFF(tty) || I_IXON(tty)) {
2494                 unsigned char stop_char  = STOP_CHAR(tty);
2495                 unsigned char start_char = START_CHAR(tty);
2496
2497                 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XON_CHAR, start_char);
2498                 send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_XOFF_CHAR, stop_char);
2499
2500                 /* if we are implementing INBOUND XON/XOFF */
2501                 if (I_IXOFF(tty)) {
2502                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2503                         dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2504                 } else {
2505                         dbg("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2506                 }
2507
2508                 /* if we are implementing OUTBOUND XON/XOFF */
2509                 if (I_IXON(tty)) {
2510                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2511                         dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x", __FUNCTION__, start_char, stop_char);
2512                 } else {
2513                         dbg("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2514                 }
2515         }
2516
2517         /* Set flow control to the configured value */
2518         send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2519         send_iosp_ext_cmd (edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2520
2521
2522         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2523         edge_port->shadowLCR |= (lData | lParity | lStop);
2524
2525         edge_port->validDataMask = mask;
2526
2527         /* Send the updated LCR value to the EdgePort */
2528         status = send_cmd_write_uart_register(edge_port, LCR, edge_port->shadowLCR);
2529         if (status != 0) {
2530                 return;
2531         }
2532
2533         /* set up the MCR register and send it to the EdgePort */
2534         edge_port->shadowMCR = MCR_MASTER_IE;
2535         if (cflag & CBAUD) {
2536                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2537         }
2538         status = send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
2539         if (status != 0) {
2540                 return;
2541         }
2542
2543         /* Determine divisor based on baud rate */
2544         baud = tty_get_baud_rate(tty);
2545         if (!baud) {
2546                 /* pick a default, any default... */
2547                 baud = 9600;
2548         }
2549
2550         dbg("%s - baud rate = %d", __FUNCTION__, baud);
2551         status = send_cmd_write_baud_rate (edge_port, baud);
2552
2553         return;
2554 }
2555
2556
2557 /****************************************************************************
2558  * unicode_to_ascii
2559  *      Turns a string from Unicode into ASCII.
2560  *      Doesn't do a good job with any characters that are outside the normal
2561  *      ASCII range, but it's only for debugging...
2562  *      NOTE: expects the unicode in LE format
2563  ****************************************************************************/
2564 static void unicode_to_ascii(char *string, int buflen, __le16 *unicode, int unicode_size)
2565 {
2566         int i;
2567
2568         if (buflen <= 0)        /* never happens, but... */
2569                 return;
2570         --buflen;               /* space for nul */
2571
2572         for (i = 0; i < unicode_size; i++) {
2573                 if (i >= buflen)
2574                         break;
2575                 string[i] = (char)(le16_to_cpu(unicode[i]));
2576         }
2577         string[i] = 0x00;
2578 }
2579
2580
2581 /****************************************************************************
2582  * get_manufacturing_desc
2583  *      reads in the manufacturing descriptor and stores it into the serial
2584  *      structure.
2585  ****************************************************************************/
2586 static void get_manufacturing_desc (struct edgeport_serial *edge_serial)
2587 {
2588         int response;
2589
2590         dbg("getting manufacturer descriptor");
2591
2592         response = rom_read (edge_serial->serial, (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2593                             (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff), EDGE_MANUF_DESC_LEN,
2594                             (__u8 *)(&edge_serial->manuf_descriptor));
2595
2596         if (response < 1) {
2597                 dev_err(&edge_serial->serial->dev->dev, "error in getting manufacturer descriptor\n");
2598         } else {
2599                 char string[30];
2600                 dbg("**Manufacturer Descriptor");
2601                 dbg("  RomSize:        %dK", edge_serial->manuf_descriptor.RomSize);
2602                 dbg("  RamSize:        %dK", edge_serial->manuf_descriptor.RamSize);
2603                 dbg("  CpuRev:         %d", edge_serial->manuf_descriptor.CpuRev);
2604                 dbg("  BoardRev:       %d", edge_serial->manuf_descriptor.BoardRev);
2605                 dbg("  NumPorts:       %d", edge_serial->manuf_descriptor.NumPorts);
2606                 dbg("  DescDate:       %d/%d/%d", edge_serial->manuf_descriptor.DescDate[0], edge_serial->manuf_descriptor.DescDate[1], edge_serial->manuf_descriptor.DescDate[2]+1900);
2607                 unicode_to_ascii(string, sizeof(string),
2608                     edge_serial->manuf_descriptor.SerialNumber,
2609                     edge_serial->manuf_descriptor.SerNumLength/2);
2610                 dbg("  SerialNumber: %s", string);
2611                 unicode_to_ascii(string, sizeof(string),
2612                     edge_serial->manuf_descriptor.AssemblyNumber,
2613                     edge_serial->manuf_descriptor.AssemblyNumLength/2);
2614                 dbg("  AssemblyNumber: %s", string);
2615                 unicode_to_ascii(string, sizeof(string),
2616                     edge_serial->manuf_descriptor.OemAssyNumber,
2617                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2618                 dbg("  OemAssyNumber:  %s", string);
2619                 dbg("  UartType:       %d", edge_serial->manuf_descriptor.UartType);
2620                 dbg("  IonPid:         %d", edge_serial->manuf_descriptor.IonPid);
2621                 dbg("  IonConfig:      %d", edge_serial->manuf_descriptor.IonConfig);
2622         }
2623 }
2624
2625
2626 /****************************************************************************
2627  * get_boot_desc
2628  *      reads in the bootloader descriptor and stores it into the serial
2629  *      structure.
2630  ****************************************************************************/
2631 static void get_boot_desc (struct edgeport_serial *edge_serial)
2632 {
2633         int response;
2634
2635         dbg("getting boot descriptor");
2636
2637         response = rom_read (edge_serial->serial, (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2638                             (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff), EDGE_BOOT_DESC_LEN,
2639                             (__u8 *)(&edge_serial->boot_descriptor));
2640
2641         if (response < 1) {
2642                 dev_err(&edge_serial->serial->dev->dev, "error in getting boot descriptor\n");
2643         } else {
2644                 dbg("**Boot Descriptor:");
2645                 dbg("  BootCodeLength: %d", le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2646                 dbg("  MajorVersion:   %d", edge_serial->boot_descriptor.MajorVersion);
2647                 dbg("  MinorVersion:   %d", edge_serial->boot_descriptor.MinorVersion);
2648                 dbg("  BuildNumber:    %d", le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2649                 dbg("  Capabilities:   0x%x", le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2650                 dbg("  UConfig0:       %d", edge_serial->boot_descriptor.UConfig0);
2651                 dbg("  UConfig1:       %d", edge_serial->boot_descriptor.UConfig1);
2652         }
2653 }
2654
2655
2656 /****************************************************************************
2657  * load_application_firmware
2658  *      This is called to load the application firmware to the device
2659  ****************************************************************************/
2660 static void load_application_firmware (struct edgeport_serial *edge_serial)
2661 {
2662         struct edge_firmware_image_record *record;
2663         unsigned char *firmware;
2664         unsigned char *FirmwareImage;
2665         int ImageSize;
2666         int response;
2667
2668
2669         switch (edge_serial->product_info.iDownloadFile) {
2670                 case EDGE_DOWNLOAD_FILE_I930:
2671                         dbg("downloading firmware version (930) %d.%d.%d",
2672                             OperationalCodeImageVersion_GEN1.MajorVersion,
2673                             OperationalCodeImageVersion_GEN1.MinorVersion,
2674                             OperationalCodeImageVersion_GEN1.BuildNumber);
2675                         firmware = &OperationalCodeImage_GEN1[0];
2676                         FirmwareImage = &OperationalCodeImage_GEN1[0];
2677                         ImageSize = sizeof(OperationalCodeImage_GEN1);
2678                         break;
2679
2680                 case EDGE_DOWNLOAD_FILE_80251:
2681                         dbg("downloading firmware version (80251) %d.%d.%d",
2682                             OperationalCodeImageVersion_GEN2.MajorVersion,
2683                             OperationalCodeImageVersion_GEN2.MinorVersion,
2684                             OperationalCodeImageVersion_GEN2.BuildNumber);
2685                         firmware = &OperationalCodeImage_GEN2[0];
2686                         FirmwareImage = &OperationalCodeImage_GEN2[0];
2687                         ImageSize = sizeof(OperationalCodeImage_GEN2);
2688                         break;
2689
2690                 case EDGE_DOWNLOAD_FILE_NONE:
2691                         dbg     ("No download file specified, skipping download\n");
2692                         return;
2693
2694                 default:
2695                         return;
2696         }
2697
2698
2699         for (;;) {
2700                 record = (struct edge_firmware_image_record *)firmware;
2701                 response = sram_write (edge_serial->serial, le16_to_cpu(record->ExtAddr), le16_to_cpu(record->Addr), le16_to_cpu(record->Len), &record->Data[0]);
2702                 if (response < 0) {
2703                         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));
2704                         break;
2705                 }
2706                 firmware += sizeof (struct edge_firmware_image_record) + le16_to_cpu(record->Len);
2707                 if (firmware >= &FirmwareImage[ImageSize]) {
2708                         break;
2709                 }
2710         }
2711
2712         dbg("sending exec_dl_code");
2713         response = usb_control_msg (edge_serial->serial->dev,
2714                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2715                                     USB_REQUEST_ION_EXEC_DL_CODE,
2716                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2717
2718         return;
2719 }
2720
2721
2722 /****************************************************************************
2723  * edge_startup
2724  ****************************************************************************/
2725 static int edge_startup (struct usb_serial *serial)
2726 {
2727         struct edgeport_serial *edge_serial;
2728         struct edgeport_port *edge_port;
2729         struct usb_device *dev;
2730         int i, j;
2731
2732         dev = serial->dev;
2733
2734         /* create our private serial structure */
2735         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2736         if (edge_serial == NULL) {
2737                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2738                 return -ENOMEM;
2739         }
2740         spin_lock_init(&edge_serial->es_lock);
2741         edge_serial->serial = serial;
2742         usb_set_serial_data(serial, edge_serial);
2743
2744         /* get the name for the device from the device */
2745         i = get_string(dev, dev->descriptor.iManufacturer,
2746             &edge_serial->name[0], MAX_NAME_LEN+1);
2747         edge_serial->name[i++] = ' ';
2748         get_string(dev, dev->descriptor.iProduct,
2749             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2750
2751         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2752
2753         /* get the manufacturing descriptor for this device */
2754         get_manufacturing_desc (edge_serial);
2755
2756         /* get the boot descriptor */
2757         get_boot_desc (edge_serial);
2758
2759         get_product_info(edge_serial);
2760
2761         /* set the number of ports from the manufacturing description */
2762         /* serial->num_ports = serial->product_info.NumPorts; */
2763         if (edge_serial->product_info.NumPorts != serial->num_ports) {
2764                 warn("%s - Device Reported %d serial ports vs core "
2765                      "thinking we have %d ports, email greg@kroah.com this info.",
2766                      __FUNCTION__, edge_serial->product_info.NumPorts,
2767                      serial->num_ports);
2768         }
2769
2770         dbg("%s - time 1 %ld", __FUNCTION__, jiffies);
2771
2772         /* now load the application firmware into this device */
2773         load_application_firmware (edge_serial);
2774
2775         dbg("%s - time 2 %ld", __FUNCTION__, jiffies);
2776
2777         /* Check current Edgeport EEPROM and update if necessary */
2778         update_edgeport_E2PROM (edge_serial);
2779
2780         dbg("%s - time 3 %ld", __FUNCTION__, jiffies);
2781
2782         /* set the configuration to use #1 */
2783 //      dbg("set_configuration 1");
2784 //      usb_set_configuration (dev, 1);
2785
2786         /* we set up the pointers to the endpoints in the edge_open function,
2787          * as the structures aren't created yet. */
2788
2789         /* set up our port private structures */
2790         for (i = 0; i < serial->num_ports; ++i) {
2791                 edge_port = kmalloc (sizeof(struct edgeport_port), GFP_KERNEL);
2792                 if (edge_port == NULL) {
2793                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2794                         for (j = 0; j < i; ++j) {
2795                                 kfree (usb_get_serial_port_data(serial->port[j]));
2796                                 usb_set_serial_port_data(serial->port[j],  NULL);
2797                         }
2798                         usb_set_serial_data(serial, NULL);
2799                         kfree(edge_serial);
2800                         return -ENOMEM;
2801                 }
2802                 memset (edge_port, 0, sizeof(struct edgeport_port));
2803                 spin_lock_init(&edge_port->ep_lock);
2804                 edge_port->port = serial->port[i];
2805                 usb_set_serial_port_data(serial->port[i], edge_port);
2806         }
2807
2808         return 0;
2809 }
2810
2811
2812 /****************************************************************************
2813  * edge_shutdown
2814  *      This function is called whenever the device is removed from the usb bus.
2815  ****************************************************************************/
2816 static void edge_shutdown (struct usb_serial *serial)
2817 {
2818         int i;
2819
2820         dbg("%s", __FUNCTION__);
2821
2822         /* stop reads and writes on all ports */
2823         for (i=0; i < serial->num_ports; ++i) {
2824                 kfree (usb_get_serial_port_data(serial->port[i]));
2825                 usb_set_serial_port_data(serial->port[i],  NULL);
2826         }
2827         kfree (usb_get_serial_data(serial));
2828         usb_set_serial_data(serial, NULL);
2829 }
2830
2831
2832 /****************************************************************************
2833  * edgeport_init
2834  *      This is called by the module subsystem, or on startup to initialize us
2835  ****************************************************************************/
2836 static int __init edgeport_init(void)
2837 {
2838         int retval;
2839
2840         retval = usb_serial_register(&edgeport_2port_device);
2841         if (retval)
2842                 goto failed_2port_device_register;
2843         retval = usb_serial_register(&edgeport_4port_device);
2844         if (retval)
2845                 goto failed_4port_device_register;
2846         retval = usb_serial_register(&edgeport_8port_device);
2847         if (retval)
2848                 goto failed_8port_device_register;
2849         retval = usb_register(&io_driver);
2850         if (retval)
2851                 goto failed_usb_register;
2852         info(DRIVER_DESC " " DRIVER_VERSION);
2853         return 0;
2854
2855 failed_usb_register:
2856         usb_serial_deregister(&edgeport_8port_device);
2857 failed_8port_device_register:
2858         usb_serial_deregister(&edgeport_4port_device);
2859 failed_4port_device_register:
2860         usb_serial_deregister(&edgeport_2port_device);
2861 failed_2port_device_register:
2862         return retval;
2863 }
2864
2865
2866 /****************************************************************************
2867  * edgeport_exit
2868  *      Called when the driver is about to be unloaded.
2869  ****************************************************************************/
2870 static void __exit edgeport_exit (void)
2871 {
2872         usb_deregister (&io_driver);
2873         usb_serial_deregister (&edgeport_2port_device);
2874         usb_serial_deregister (&edgeport_4port_device);
2875         usb_serial_deregister (&edgeport_8port_device);
2876 }
2877
2878 module_init(edgeport_init);
2879 module_exit(edgeport_exit);
2880
2881 /* Module information */
2882 MODULE_AUTHOR( DRIVER_AUTHOR );
2883 MODULE_DESCRIPTION( DRIVER_DESC );
2884 MODULE_LICENSE("GPL");
2885
2886 module_param(debug, bool, S_IRUGO | S_IWUSR);
2887 MODULE_PARM_DESC(debug, "Debug enabled or not");
2888
2889 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
2890 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");