drivers/usb/serial/io_edgeport.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Edgeport USB Serial Converter driver
   4  *
   5  * Copyright (C) 2000 Inside Out Networks, All rights reserved.
   6  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   7  *
   8  * Supports the following devices:
   9  *      Edgeport/4
  10  *      Edgeport/4t
  11  *      Edgeport/2
  12  *      Edgeport/4i
  13  *      Edgeport/2i
  14  *      Edgeport/421
  15  *      Edgeport/21
  16  *      Rapidport/4
  17  *      Edgeport/8
  18  *      Edgeport/2D8
  19  *      Edgeport/4D8
  20  *      Edgeport/8i
  21  *
  22  * For questions or problems with this driver, contact Inside Out
  23  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  24  * or Al Borchers <alborchers@steinerpoint.com>.
  25  *
  26  */
  27
  28 #include <linux/kernel.h>
  29 #include <linux/jiffies.h>
  30 #include <linux/errno.h>
  31 #include <linux/slab.h>
  32 #include <linux/tty.h>
  33 #include <linux/tty_driver.h>
  34 #include <linux/tty_flip.h>
  35 #include <linux/module.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/serial.h>
  38 #include <linux/ioctl.h>
  39 #include <linux/wait.h>
  40 #include <linux/firmware.h>
  41 #include <linux/ihex.h>
  42 #include <linux/uaccess.h>
  43 #include <linux/usb.h>
  44 #include <linux/usb/serial.h>
  45 #include "io_edgeport.h"
  46 #include "io_ionsp.h"           /* info for the iosp messages */
  47 #include "io_16654.h"           /* 16654 UART defines */
  48
  49 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  50 #define DRIVER_DESC "Edgeport USB Serial Driver"
  51
  52 #define MAX_NAME_LEN            64
  53
  54 #define OPEN_TIMEOUT            (5*HZ)          /* 5 seconds */
  55
  56 static const struct usb_device_id edgeport_2port_id_table[] = {
  57         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
  58         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
  59         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
  60         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
  61         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
  62         { }
  63 };
  64
  65 static const struct usb_device_id edgeport_4port_id_table[] = {
  66         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
  67         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
  68         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
  69         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
  70         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
  71         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
  72         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
  73         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
  74         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
  75         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
  76         { }
  77 };
  78
  79 static const struct usb_device_id edgeport_8port_id_table[] = {
  80         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
  81         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
  82         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
  83         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
  84         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
  85         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
  86         { }
  87 };
  88
  89 static const struct usb_device_id Epic_port_id_table[] = {
  90         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
  91         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
  92         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
  93         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
  94         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
  95         { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
  96         { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
  97         { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
  98         { }
  99 };
 100
 101 /* Devices that this driver supports */
 102 static const struct usb_device_id id_table_combined[] = {
 103         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4) },
 104         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_RAPIDPORT_4) },
 105         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4T) },
 106         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_MT4X56USB) },
 107         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2) },
 108         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4I) },
 109         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2I) },
 110         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_421) },
 111         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_21) },
 112         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU) },
 113         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8) },
 114         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_2_DIN) },
 115         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_4_DIN) },
 116         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU) },
 117         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_22I) },
 118         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_4) },
 119         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_COMPATIBLE) },
 120         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8I) },
 121         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8R) },
 122         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_8RR) },
 123         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_EDGEPORT_412_8) },
 124         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0202) },
 125         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0203) },
 126         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0310) },
 127         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0311) },
 128         { USB_DEVICE(USB_VENDOR_ID_NCR, NCR_DEVICE_ID_EPIC_0312) },
 129         { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A758) },
 130         { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A794) },
 131         { USB_DEVICE(USB_VENDOR_ID_AXIOHM, AXIOHM_DEVICE_ID_EPIC_A225) },
 132         { } /* Terminating entry */
 133 };
 134
 135 MODULE_DEVICE_TABLE(usb, id_table_combined);
 136
 137
 138 /* receive port state */
 139 enum RXSTATE {
 140         EXPECT_HDR1 = 0,    /* Expect header byte 1 */
 141         EXPECT_HDR2 = 1,    /* Expect header byte 2 */
 142         EXPECT_DATA = 2,    /* Expect 'RxBytesRemaining' data */
 143         EXPECT_HDR3 = 3,    /* Expect header byte 3 (for status hdrs only) */
 144 };
 145
 146
 147 /* Transmit Fifo
 148  * This Transmit queue is an extension of the edgeport Rx buffer.
 149  * The maximum amount of data buffered in both the edgeport
 150  * Rx buffer (maxTxCredits) and this buffer will never exceed maxTxCredits.
 151  */
 152 struct TxFifo {
 153         unsigned int    head;   /* index to head pointer (write) */
 154         unsigned int    tail;   /* index to tail pointer (read)  */
 155         unsigned int    count;  /* Bytes in queue */
 156         unsigned int    size;   /* Max size of queue (equal to Max number of TxCredits) */
 157         unsigned char   *fifo;  /* allocated Buffer */
 158 };
 159
 160 /* This structure holds all of the local port information */
 161 struct edgeport_port {
 162         __u16                   txCredits;              /* our current credits for this port */
 163         __u16                   maxTxCredits;           /* the max size of the port */
 164
 165         struct TxFifo           txfifo;                 /* transmit fifo -- size will be maxTxCredits */
 166         struct urb              *write_urb;             /* write URB for this port */
 167         bool                    write_in_progress;      /* 'true' while a write URB is outstanding */
 168         spinlock_t              ep_lock;
 169
 170         __u8                    shadowLCR;              /* last LCR value received */
 171         __u8                    shadowMCR;              /* last MCR value received */
 172         __u8                    shadowMSR;              /* last MSR value received */
 173         __u8                    shadowLSR;              /* last LSR value received */
 174         __u8                    shadowXonChar;          /* last value set as XON char in Edgeport */
 175         __u8                    shadowXoffChar;         /* last value set as XOFF char in Edgeport */
 176         __u8                    validDataMask;
 177         __u32                   baudRate;
 178
 179         bool                    open;
 180         bool                    openPending;
 181         bool                    commandPending;
 182         bool                    closePending;
 183         bool                    chaseResponsePending;
 184
 185         wait_queue_head_t       wait_chase;             /* for handling sleeping while waiting for chase to finish */
 186         wait_queue_head_t       wait_open;              /* for handling sleeping while waiting for open to finish */
 187         wait_queue_head_t       wait_command;           /* for handling sleeping while waiting for command to finish */
 188
 189         struct usb_serial_port  *port;                  /* loop back to the owner of this object */
 190 };
 191
 192
 193 /* This structure holds all of the individual device information */
 194 struct edgeport_serial {
 195         char                    name[MAX_NAME_LEN+2];           /* string name of this device */
 196
 197         struct edge_manuf_descriptor    manuf_descriptor;       /* the manufacturer descriptor */
 198         struct edge_boot_descriptor     boot_descriptor;        /* the boot firmware descriptor */
 199         struct edgeport_product_info    product_info;           /* Product Info */
 200         struct edge_compatibility_descriptor epic_descriptor;   /* Edgeport compatible descriptor */
 201         int                     is_epic;                        /* flag if EPiC device or not */
 202
 203         __u8                    interrupt_in_endpoint;          /* the interrupt endpoint handle */
 204         unsigned char           *interrupt_in_buffer;           /* the buffer we use for the interrupt endpoint */
 205         struct urb              *interrupt_read_urb;            /* our interrupt urb */
 206
 207         __u8                    bulk_in_endpoint;               /* the bulk in endpoint handle */
 208         unsigned char           *bulk_in_buffer;                /* the buffer we use for the bulk in endpoint */
 209         struct urb              *read_urb;                      /* our bulk read urb */
 210         bool                    read_in_progress;
 211         spinlock_t              es_lock;
 212
 213         __u8                    bulk_out_endpoint;              /* the bulk out endpoint handle */
 214
 215         __s16                   rxBytesAvail;                   /* the number of bytes that we need to read from this device */
 216
 217         enum RXSTATE            rxState;                        /* the current state of the bulk receive processor */
 218         __u8                    rxHeader1;                      /* receive header byte 1 */
 219         __u8                    rxHeader2;                      /* receive header byte 2 */
 220         __u8                    rxHeader3;                      /* receive header byte 3 */
 221         __u8                    rxPort;                         /* the port that we are currently receiving data for */
 222         __u8                    rxStatusCode;                   /* the receive status code */
 223         __u8                    rxStatusParam;                  /* the receive status paramater */
 224         __s16                   rxBytesRemaining;               /* the number of port bytes left to read */
 225         struct usb_serial       *serial;                        /* loop back to the owner of this object */
 226 };
 227
 228 /* baud rate information */
 229 struct divisor_table_entry {
 230         __u32   BaudRate;
 231         __u16  Divisor;
 232 };
 233
 234 /*
 235  * Define table of divisors for Rev A EdgePort/4 hardware
 236  * These assume a 3.6864MHz crystal, the standard /16, and
 237  * MCR.7 = 0.
 238  */
 239
 240 static const struct divisor_table_entry divisor_table[] = {
 241         {   50,         4608},
 242         {   75,         3072},
 243         {   110,        2095},  /* 2094.545455 => 230450   => .0217 % over */
 244         {   134,        1713},  /* 1713.011152 => 230398.5 => .00065% under */
 245         {   150,        1536},
 246         {   300,        768},
 247         {   600,        384},
 248         {   1200,       192},
 249         {   1800,       128},
 250         {   2400,       96},
 251         {   4800,       48},
 252         {   7200,       32},
 253         {   9600,       24},
 254         {   14400,      16},
 255         {   19200,      12},
 256         {   38400,      6},
 257         {   57600,      4},
 258         {   115200,     2},
 259         {   230400,     1},
 260 };
 261
 262 /* Number of outstanding Command Write Urbs */
 263 static atomic_t CmdUrbs = ATOMIC_INIT(0);
 264
 265
 266 /* function prototypes */
 267
 268 static void edge_close(struct usb_serial_port *port);
 269
 270 static void  process_rcvd_data(struct edgeport_serial *edge_serial,
 271                                 unsigned char *buffer, __u16 bufferLength);
 272 static void process_rcvd_status(struct edgeport_serial *edge_serial,
 273                                 __u8 byte2, __u8 byte3);
 274 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 275                 int length);
 276 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr);
 277 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
 278                                 __u8 lsr, __u8 data);
 279 static int  send_iosp_ext_cmd(struct edgeport_port *edge_port, __u8 command,
 280                                 __u8 param);
 281 static int  calc_baud_rate_divisor(struct device *dev, int baud_rate, int *divisor);
 282 static void change_port_settings(struct tty_struct *tty,
 283                                 struct edgeport_port *edge_port,
 284                                 struct ktermios *old_termios);
 285 static int  send_cmd_write_uart_register(struct edgeport_port *edge_port,
 286                                 __u8 regNum, __u8 regValue);
 287 static int  write_cmd_usb(struct edgeport_port *edge_port,
 288                                 unsigned char *buffer, int writeLength);
 289 static void send_more_port_data(struct edgeport_serial *edge_serial,
 290                                 struct edgeport_port *edge_port);
 291
 292 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
 293                                         __u16 length, const __u8 *data);
 294
 295 /* ************************************************************************ */
 296 /* ************************************************************************ */
 297 /* ************************************************************************ */
 298 /* ************************************************************************ */
 299
 300 /************************************************************************
 301  *                                                                      *
 302  * update_edgeport_E2PROM()     Compare current versions of             *
 303  *                              Boot ROM and Manufacture                *
 304  *                              Descriptors with versions               *
 305  *                              embedded in this driver                 *
 306  *                                                                      *
 307  ************************************************************************/
 308 static void update_edgeport_E2PROM(struct edgeport_serial *edge_serial)
 309 {
 310         struct device *dev = &edge_serial->serial->dev->dev;
 311         __u32 BootCurVer;
 312         __u32 BootNewVer;
 313         __u8 BootMajorVersion;
 314         __u8 BootMinorVersion;
 315         __u16 BootBuildNumber;
 316         __u32 Bootaddr;
 317         const struct ihex_binrec *rec;
 318         const struct firmware *fw;
 319         const char *fw_name;
 320         int response;
 321
 322         switch (edge_serial->product_info.iDownloadFile) {
 323         case EDGE_DOWNLOAD_FILE_I930:
 324                 fw_name = "edgeport/boot.fw";
 325                 break;
 326         case EDGE_DOWNLOAD_FILE_80251:
 327                 fw_name = "edgeport/boot2.fw";
 328                 break;
 329         default:
 330                 return;
 331         }
 332
 333         response = request_ihex_firmware(&fw, fw_name,
 334                                          &edge_serial->serial->dev->dev);
 335         if (response) {
 336                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
 337                        fw_name, response);
 338                 return;
 339         }
 340
 341         rec = (const struct ihex_binrec *)fw->data;
 342         BootMajorVersion = rec->data[0];
 343         BootMinorVersion = rec->data[1];
 344         BootBuildNumber = (rec->data[2] << 8) | rec->data[3];
 345
 346         /* Check Boot Image Version */
 347         BootCurVer = (edge_serial->boot_descriptor.MajorVersion << 24) +
 348                      (edge_serial->boot_descriptor.MinorVersion << 16) +
 349                       le16_to_cpu(edge_serial->boot_descriptor.BuildNumber);
 350
 351         BootNewVer = (BootMajorVersion << 24) +
 352                      (BootMinorVersion << 16) +
 353                       BootBuildNumber;
 354
 355         dev_dbg(dev, "Current Boot Image version %d.%d.%d\n",
 356             edge_serial->boot_descriptor.MajorVersion,
 357             edge_serial->boot_descriptor.MinorVersion,
 358             le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
 359
 360
 361         if (BootNewVer > BootCurVer) {
 362                 dev_dbg(dev, "**Update Boot Image from %d.%d.%d to %d.%d.%d\n",
 363                     edge_serial->boot_descriptor.MajorVersion,
 364                     edge_serial->boot_descriptor.MinorVersion,
 365                     le16_to_cpu(edge_serial->boot_descriptor.BuildNumber),
 366                     BootMajorVersion, BootMinorVersion, BootBuildNumber);
 367
 368                 dev_dbg(dev, "Downloading new Boot Image\n");
 369
 370                 for (rec = ihex_next_binrec(rec); rec;
 371                      rec = ihex_next_binrec(rec)) {
 372                         Bootaddr = be32_to_cpu(rec->addr);
 373                         response = rom_write(edge_serial->serial,
 374                                              Bootaddr >> 16,
 375                                              Bootaddr & 0xFFFF,
 376                                              be16_to_cpu(rec->len),
 377                                              &rec->data[0]);
 378                         if (response < 0) {
 379                                 dev_err(&edge_serial->serial->dev->dev,
 380                                         "rom_write failed (%x, %x, %d)\n",
 381                                         Bootaddr >> 16, Bootaddr & 0xFFFF,
 382                                         be16_to_cpu(rec->len));
 383                                 break;
 384                         }
 385                 }
 386         } else {
 387                 dev_dbg(dev, "Boot Image -- already up to date\n");
 388         }
 389         release_firmware(fw);
 390 }
 391
 392 static void dump_product_info(struct edgeport_serial *edge_serial,
 393                               struct edgeport_product_info *product_info)
 394 {
 395         struct device *dev = &edge_serial->serial->dev->dev;
 396
 397         /* Dump Product Info structure */
 398         dev_dbg(dev, "**Product Information:\n");
 399         dev_dbg(dev, "  ProductId             %x\n", product_info->ProductId);
 400         dev_dbg(dev, "  NumPorts              %d\n", product_info->NumPorts);
 401         dev_dbg(dev, "  ProdInfoVer           %d\n", product_info->ProdInfoVer);
 402         dev_dbg(dev, "  IsServer              %d\n", product_info->IsServer);
 403         dev_dbg(dev, "  IsRS232               %d\n", product_info->IsRS232);
 404         dev_dbg(dev, "  IsRS422               %d\n", product_info->IsRS422);
 405         dev_dbg(dev, "  IsRS485               %d\n", product_info->IsRS485);
 406         dev_dbg(dev, "  RomSize               %d\n", product_info->RomSize);
 407         dev_dbg(dev, "  RamSize               %d\n", product_info->RamSize);
 408         dev_dbg(dev, "  CpuRev                %x\n", product_info->CpuRev);
 409         dev_dbg(dev, "  BoardRev              %x\n", product_info->BoardRev);
 410         dev_dbg(dev, "  BootMajorVersion      %d.%d.%d\n",
 411                 product_info->BootMajorVersion,
 412                 product_info->BootMinorVersion,
 413                 le16_to_cpu(product_info->BootBuildNumber));
 414         dev_dbg(dev, "  FirmwareMajorVersion  %d.%d.%d\n",
 415                 product_info->FirmwareMajorVersion,
 416                 product_info->FirmwareMinorVersion,
 417                 le16_to_cpu(product_info->FirmwareBuildNumber));
 418         dev_dbg(dev, "  ManufactureDescDate   %d/%d/%d\n",
 419                 product_info->ManufactureDescDate[0],
 420                 product_info->ManufactureDescDate[1],
 421                 product_info->ManufactureDescDate[2]+1900);
 422         dev_dbg(dev, "  iDownloadFile         0x%x\n",
 423                 product_info->iDownloadFile);
 424         dev_dbg(dev, "  EpicVer               %d\n", product_info->EpicVer);
 425 }
 426
 427 static void get_product_info(struct edgeport_serial *edge_serial)
 428 {
 429         struct edgeport_product_info *product_info = &edge_serial->product_info;
 430
 431         memset(product_info, 0, sizeof(struct edgeport_product_info));
 432
 433         product_info->ProductId = (__u16)(le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct) & ~ION_DEVICE_ID_80251_NETCHIP);
 434         product_info->NumPorts = edge_serial->manuf_descriptor.NumPorts;
 435         product_info->ProdInfoVer = 0;
 436
 437         product_info->RomSize = edge_serial->manuf_descriptor.RomSize;
 438         product_info->RamSize = edge_serial->manuf_descriptor.RamSize;
 439         product_info->CpuRev = edge_serial->manuf_descriptor.CpuRev;
 440         product_info->BoardRev = edge_serial->manuf_descriptor.BoardRev;
 441
 442         product_info->BootMajorVersion =
 443                                 edge_serial->boot_descriptor.MajorVersion;
 444         product_info->BootMinorVersion =
 445                                 edge_serial->boot_descriptor.MinorVersion;
 446         product_info->BootBuildNumber =
 447                                 edge_serial->boot_descriptor.BuildNumber;
 448
 449         memcpy(product_info->ManufactureDescDate,
 450                         edge_serial->manuf_descriptor.DescDate,
 451                         sizeof(edge_serial->manuf_descriptor.DescDate));
 452
 453         /* check if this is 2nd generation hardware */
 454         if (le16_to_cpu(edge_serial->serial->dev->descriptor.idProduct)
 455                                             & ION_DEVICE_ID_80251_NETCHIP)
 456                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_80251;
 457         else
 458                 product_info->iDownloadFile = EDGE_DOWNLOAD_FILE_I930;
 459
 460         /* Determine Product type and set appropriate flags */
 461         switch (DEVICE_ID_FROM_USB_PRODUCT_ID(product_info->ProductId)) {
 462         case ION_DEVICE_ID_EDGEPORT_COMPATIBLE:
 463         case ION_DEVICE_ID_EDGEPORT_4T:
 464         case ION_DEVICE_ID_EDGEPORT_4:
 465         case ION_DEVICE_ID_EDGEPORT_2:
 466         case ION_DEVICE_ID_EDGEPORT_8_DUAL_CPU:
 467         case ION_DEVICE_ID_EDGEPORT_8:
 468         case ION_DEVICE_ID_EDGEPORT_421:
 469         case ION_DEVICE_ID_EDGEPORT_21:
 470         case ION_DEVICE_ID_EDGEPORT_2_DIN:
 471         case ION_DEVICE_ID_EDGEPORT_4_DIN:
 472         case ION_DEVICE_ID_EDGEPORT_16_DUAL_CPU:
 473                 product_info->IsRS232 = 1;
 474                 break;
 475
 476         case ION_DEVICE_ID_EDGEPORT_2I: /* Edgeport/2 RS422/RS485 */
 477                 product_info->IsRS422 = 1;
 478                 product_info->IsRS485 = 1;
 479                 break;
 480
 481         case ION_DEVICE_ID_EDGEPORT_8I: /* Edgeport/4 RS422 */
 482         case ION_DEVICE_ID_EDGEPORT_4I: /* Edgeport/4 RS422 */
 483                 product_info->IsRS422 = 1;
 484                 break;
 485         }
 486
 487         dump_product_info(edge_serial, product_info);
 488 }
 489
 490 static int get_epic_descriptor(struct edgeport_serial *ep)
 491 {
 492         int result;
 493         struct usb_serial *serial = ep->serial;
 494         struct edgeport_product_info *product_info = &ep->product_info;
 495         struct edge_compatibility_descriptor *epic;
 496         struct edge_compatibility_bits *bits;
 497         struct device *dev = &serial->dev->dev;
 498
 499         ep->is_epic = 0;
 500
 501         epic = kmalloc(sizeof(*epic), GFP_KERNEL);
 502         if (!epic)
 503                 return -ENOMEM;
 504
 505         result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 506                                  USB_REQUEST_ION_GET_EPIC_DESC,
 507                                  0xC0, 0x00, 0x00,
 508                                  epic, sizeof(*epic),
 509                                  300);
 510         if (result == sizeof(*epic)) {
 511                 ep->is_epic = 1;
 512                 memcpy(&ep->epic_descriptor, epic, sizeof(*epic));
 513                 memset(product_info, 0, sizeof(struct edgeport_product_info));
 514
 515                 product_info->NumPorts = epic->NumPorts;
 516                 product_info->ProdInfoVer = 0;
 517                 product_info->FirmwareMajorVersion = epic->MajorVersion;
 518                 product_info->FirmwareMinorVersion = epic->MinorVersion;
 519                 product_info->FirmwareBuildNumber = epic->BuildNumber;
 520                 product_info->iDownloadFile = epic->iDownloadFile;
 521                 product_info->EpicVer = epic->EpicVer;
 522                 product_info->Epic = epic->Supports;
 523                 product_info->ProductId = ION_DEVICE_ID_EDGEPORT_COMPATIBLE;
 524                 dump_product_info(ep, product_info);
 525
 526                 bits = &ep->epic_descriptor.Supports;
 527                 dev_dbg(dev, "**EPIC descriptor:\n");
 528                 dev_dbg(dev, "  VendEnableSuspend: %s\n", bits->VendEnableSuspend ? "TRUE": "FALSE");
 529                 dev_dbg(dev, "  IOSPOpen         : %s\n", bits->IOSPOpen        ? "TRUE": "FALSE");
 530                 dev_dbg(dev, "  IOSPClose        : %s\n", bits->IOSPClose       ? "TRUE": "FALSE");
 531                 dev_dbg(dev, "  IOSPChase        : %s\n", bits->IOSPChase       ? "TRUE": "FALSE");
 532                 dev_dbg(dev, "  IOSPSetRxFlow    : %s\n", bits->IOSPSetRxFlow   ? "TRUE": "FALSE");
 533                 dev_dbg(dev, "  IOSPSetTxFlow    : %s\n", bits->IOSPSetTxFlow   ? "TRUE": "FALSE");
 534                 dev_dbg(dev, "  IOSPSetXChar     : %s\n", bits->IOSPSetXChar    ? "TRUE": "FALSE");
 535                 dev_dbg(dev, "  IOSPRxCheck      : %s\n", bits->IOSPRxCheck     ? "TRUE": "FALSE");
 536                 dev_dbg(dev, "  IOSPSetClrBreak  : %s\n", bits->IOSPSetClrBreak ? "TRUE": "FALSE");
 537                 dev_dbg(dev, "  IOSPWriteMCR     : %s\n", bits->IOSPWriteMCR    ? "TRUE": "FALSE");
 538                 dev_dbg(dev, "  IOSPWriteLCR     : %s\n", bits->IOSPWriteLCR    ? "TRUE": "FALSE");
 539                 dev_dbg(dev, "  IOSPSetBaudRate  : %s\n", bits->IOSPSetBaudRate ? "TRUE": "FALSE");
 540                 dev_dbg(dev, "  TrueEdgeport     : %s\n", bits->TrueEdgeport    ? "TRUE": "FALSE");
 541
 542                 result = 0;
 543         } else if (result >= 0) {
 544                 dev_warn(&serial->interface->dev, "short epic descriptor received: %d\n",
 545                          result);
 546                 result = -EIO;
 547         }
 548
 549         kfree(epic);
 550
 551         return result;
 552 }
 553
 554
 555 /************************************************************************/
 556 /************************************************************************/
 557 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 558 /*            U S B  C A L L B A C K   F U N C T I O N S                */
 559 /************************************************************************/
 560 /************************************************************************/
 561
 562 /*****************************************************************************
 563  * edge_interrupt_callback
 564  *      this is the callback function for when we have received data on the
 565  *      interrupt endpoint.
 566  *****************************************************************************/
 567 static void edge_interrupt_callback(struct urb *urb)
 568 {
 569         struct edgeport_serial *edge_serial = urb->context;
 570         struct device *dev;
 571         struct edgeport_port *edge_port;
 572         struct usb_serial_port *port;
 573         unsigned char *data = urb->transfer_buffer;
 574         int length = urb->actual_length;
 575         unsigned long flags;
 576         int bytes_avail;
 577         int position;
 578         int txCredits;
 579         int portNumber;
 580         int result;
 581         int status = urb->status;
 582
 583         switch (status) {
 584         case 0:
 585                 /* success */
 586                 break;
 587         case -ECONNRESET:
 588         case -ENOENT:
 589         case -ESHUTDOWN:
 590                 /* this urb is terminated, clean up */
 591                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 592                 return;
 593         default:
 594                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 595                 goto exit;
 596         }
 597
 598         dev = &edge_serial->serial->dev->dev;
 599
 600         /* process this interrupt-read even if there are no ports open */
 601         if (length) {
 602                 usb_serial_debug_data(dev, __func__, length, data);
 603
 604                 if (length > 1) {
 605                         bytes_avail = data[0] | (data[1] << 8);
 606                         if (bytes_avail) {
 607                                 spin_lock_irqsave(&edge_serial->es_lock, flags);
 608                                 edge_serial->rxBytesAvail += bytes_avail;
 609                                 dev_dbg(dev,
 610                                         "%s - bytes_avail=%d, rxBytesAvail=%d, read_in_progress=%d\n",
 611                                         __func__, bytes_avail,
 612                                         edge_serial->rxBytesAvail,
 613                                         edge_serial->read_in_progress);
 614
 615                                 if (edge_serial->rxBytesAvail > 0 &&
 616                                     !edge_serial->read_in_progress) {
 617                                         dev_dbg(dev, "%s - posting a read\n", __func__);
 618                                         edge_serial->read_in_progress = true;
 619
 620                                         /* we have pending bytes on the
 621                                            bulk in pipe, send a request */
 622                                         result = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 623                                         if (result) {
 624                                                 dev_err(dev,
 625                                                         "%s - usb_submit_urb(read bulk) failed with result = %d\n",
 626                                                         __func__, result);
 627                                                 edge_serial->read_in_progress = false;
 628                                         }
 629                                 }
 630                                 spin_unlock_irqrestore(&edge_serial->es_lock,
 631                                                        flags);
 632                         }
 633                 }
 634                 /* grab the txcredits for the ports if available */
 635                 position = 2;
 636                 portNumber = 0;
 637                 while ((position < length - 1) &&
 638                                 (portNumber < edge_serial->serial->num_ports)) {
 639                         txCredits = data[position] | (data[position+1] << 8);
 640                         if (txCredits) {
 641                                 port = edge_serial->serial->port[portNumber];
 642                                 edge_port = usb_get_serial_port_data(port);
 643                                 if (edge_port && edge_port->open) {
 644                                         spin_lock_irqsave(&edge_port->ep_lock,
 645                                                           flags);
 646                                         edge_port->txCredits += txCredits;
 647                                         spin_unlock_irqrestore(&edge_port->ep_lock,
 648                                                                flags);
 649                                         dev_dbg(dev, "%s - txcredits for port%d = %d\n",
 650                                                 __func__, portNumber,
 651                                                 edge_port->txCredits);
 652
 653                                         /* tell the tty driver that something
 654                                            has changed */
 655                                         tty_port_tty_wakeup(&edge_port->port->port);
 656                                         /* Since we have more credit, check
 657                                            if more data can be sent */
 658                                         send_more_port_data(edge_serial,
 659                                                                 edge_port);
 660                                 }
 661                         }
 662                         position += 2;
 663                         ++portNumber;
 664                 }
 665         }
 666
 667 exit:
 668         result = usb_submit_urb(urb, GFP_ATOMIC);
 669         if (result)
 670                 dev_err(&urb->dev->dev,
 671                         "%s - Error %d submitting control urb\n",
 672                                                 __func__, result);
 673 }
 674
 675
 676 /*****************************************************************************
 677  * edge_bulk_in_callback
 678  *      this is the callback function for when we have received data on the
 679  *      bulk in endpoint.
 680  *****************************************************************************/
 681 static void edge_bulk_in_callback(struct urb *urb)
 682 {
 683         struct edgeport_serial  *edge_serial = urb->context;
 684         struct device *dev;
 685         unsigned char           *data = urb->transfer_buffer;
 686         int                     retval;
 687         __u16                   raw_data_length;
 688         int status = urb->status;
 689         unsigned long flags;
 690
 691         if (status) {
 692                 dev_dbg(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n",
 693                         __func__, status);
 694                 edge_serial->read_in_progress = false;
 695                 return;
 696         }
 697
 698         if (urb->actual_length == 0) {
 699                 dev_dbg(&urb->dev->dev, "%s - read bulk callback with no data\n", __func__);
 700                 edge_serial->read_in_progress = false;
 701                 return;
 702         }
 703
 704         dev = &edge_serial->serial->dev->dev;
 705         raw_data_length = urb->actual_length;
 706
 707         usb_serial_debug_data(dev, __func__, raw_data_length, data);
 708
 709         spin_lock_irqsave(&edge_serial->es_lock, flags);
 710
 711         /* decrement our rxBytes available by the number that we just got */
 712         edge_serial->rxBytesAvail -= raw_data_length;
 713
 714         dev_dbg(dev, "%s - Received = %d, rxBytesAvail %d\n", __func__,
 715                 raw_data_length, edge_serial->rxBytesAvail);
 716
 717         process_rcvd_data(edge_serial, data, urb->actual_length);
 718
 719         /* check to see if there's any more data for us to read */
 720         if (edge_serial->rxBytesAvail > 0) {
 721                 dev_dbg(dev, "%s - posting a read\n", __func__);
 722                 retval = usb_submit_urb(edge_serial->read_urb, GFP_ATOMIC);
 723                 if (retval) {
 724                         dev_err(dev,
 725                                 "%s - usb_submit_urb(read bulk) failed, retval = %d\n",
 726                                 __func__, retval);
 727                         edge_serial->read_in_progress = false;
 728                 }
 729         } else {
 730                 edge_serial->read_in_progress = false;
 731         }
 732
 733         spin_unlock_irqrestore(&edge_serial->es_lock, flags);
 734 }
 735
 736
 737 /*****************************************************************************
 738  * edge_bulk_out_data_callback
 739  *      this is the callback function for when we have finished sending
 740  *      serial data on the bulk out endpoint.
 741  *****************************************************************************/
 742 static void edge_bulk_out_data_callback(struct urb *urb)
 743 {
 744         struct edgeport_port *edge_port = urb->context;
 745         int status = urb->status;
 746
 747         if (status) {
 748                 dev_dbg(&urb->dev->dev,
 749                         "%s - nonzero write bulk status received: %d\n",
 750                         __func__, status);
 751         }
 752
 753         if (edge_port->open)
 754                 tty_port_tty_wakeup(&edge_port->port->port);
 755
 756         /* Release the Write URB */
 757         edge_port->write_in_progress = false;
 758
 759         /* Check if more data needs to be sent */
 760         send_more_port_data((struct edgeport_serial *)
 761                 (usb_get_serial_data(edge_port->port->serial)), edge_port);
 762 }
 763
 764
 765 /*****************************************************************************
 766  * BulkOutCmdCallback
 767  *      this is the callback function for when we have finished sending a
 768  *      command on the bulk out endpoint.
 769  *****************************************************************************/
 770 static void edge_bulk_out_cmd_callback(struct urb *urb)
 771 {
 772         struct edgeport_port *edge_port = urb->context;
 773         int status = urb->status;
 774
 775         atomic_dec(&CmdUrbs);
 776         dev_dbg(&urb->dev->dev, "%s - FREE URB %p (outstanding %d)\n",
 777                 __func__, urb, atomic_read(&CmdUrbs));
 778
 779
 780         /* clean up the transfer buffer */
 781         kfree(urb->transfer_buffer);
 782
 783         /* Free the command urb */
 784         usb_free_urb(urb);
 785
 786         if (status) {
 787                 dev_dbg(&urb->dev->dev,
 788                         "%s - nonzero write bulk status received: %d\n",
 789                         __func__, status);
 790                 return;
 791         }
 792
 793         /* tell the tty driver that something has changed */
 794         if (edge_port->open)
 795                 tty_port_tty_wakeup(&edge_port->port->port);
 796
 797         /* we have completed the command */
 798         edge_port->commandPending = false;
 799         wake_up(&edge_port->wait_command);
 800 }
 801
 802
 803 /*****************************************************************************
 804  * Driver tty interface functions
 805  *****************************************************************************/
 806
 807 /*****************************************************************************
 808  * SerialOpen
 809  *      this function is called by the tty driver when a port is opened
 810  *      If successful, we return 0
 811  *      Otherwise we return a negative error number.
 812  *****************************************************************************/
 813 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
 814 {
 815         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
 816         struct device *dev = &port->dev;
 817         struct usb_serial *serial;
 818         struct edgeport_serial *edge_serial;
 819         int response;
 820
 821         if (edge_port == NULL)
 822                 return -ENODEV;
 823
 824         /* see if we've set up our endpoint info yet (can't set it up
 825            in edge_startup as the structures were not set up at that time.) */
 826         serial = port->serial;
 827         edge_serial = usb_get_serial_data(serial);
 828         if (edge_serial == NULL)
 829                 return -ENODEV;
 830         if (edge_serial->interrupt_in_buffer == NULL) {
 831                 struct usb_serial_port *port0 = serial->port[0];
 832
 833                 /* not set up yet, so do it now */
 834                 edge_serial->interrupt_in_buffer =
 835                                         port0->interrupt_in_buffer;
 836                 edge_serial->interrupt_in_endpoint =
 837                                         port0->interrupt_in_endpointAddress;
 838                 edge_serial->interrupt_read_urb = port0->interrupt_in_urb;
 839                 edge_serial->bulk_in_buffer = port0->bulk_in_buffer;
 840                 edge_serial->bulk_in_endpoint =
 841                                         port0->bulk_in_endpointAddress;
 842                 edge_serial->read_urb = port0->read_urb;
 843                 edge_serial->bulk_out_endpoint =
 844                                         port0->bulk_out_endpointAddress;
 845
 846                 /* set up our interrupt urb */
 847                 usb_fill_int_urb(edge_serial->interrupt_read_urb,
 848                       serial->dev,
 849                       usb_rcvintpipe(serial->dev,
 850                                 port0->interrupt_in_endpointAddress),
 851                       port0->interrupt_in_buffer,
 852                       edge_serial->interrupt_read_urb->transfer_buffer_length,
 853                       edge_interrupt_callback, edge_serial,
 854                       edge_serial->interrupt_read_urb->interval);
 855
 856                 /* set up our bulk in urb */
 857                 usb_fill_bulk_urb(edge_serial->read_urb, serial->dev,
 858                         usb_rcvbulkpipe(serial->dev,
 859                                 port0->bulk_in_endpointAddress),
 860                         port0->bulk_in_buffer,
 861                         edge_serial->read_urb->transfer_buffer_length,
 862                         edge_bulk_in_callback, edge_serial);
 863                 edge_serial->read_in_progress = false;
 864
 865                 /* start interrupt read for this edgeport
 866                  * this interrupt will continue as long
 867                  * as the edgeport is connected */
 868                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
 869                                                                 GFP_KERNEL);
 870                 if (response) {
 871                         dev_err(dev, "%s - Error %d submitting control urb\n",
 872                                 __func__, response);
 873                 }
 874         }
 875
 876         /* initialize our wait queues */
 877         init_waitqueue_head(&edge_port->wait_open);
 878         init_waitqueue_head(&edge_port->wait_chase);
 879         init_waitqueue_head(&edge_port->wait_command);
 880
 881         /* initialize our port settings */
 882         edge_port->txCredits = 0;       /* Can't send any data yet */
 883         /* Must always set this bit to enable ints! */
 884         edge_port->shadowMCR = MCR_MASTER_IE;
 885         edge_port->chaseResponsePending = false;
 886
 887         /* send a open port command */
 888         edge_port->openPending = true;
 889         edge_port->open        = false;
 890         response = send_iosp_ext_cmd(edge_port, IOSP_CMD_OPEN_PORT, 0);
 891
 892         if (response < 0) {
 893                 dev_err(dev, "%s - error sending open port command\n", __func__);
 894                 edge_port->openPending = false;
 895                 return -ENODEV;
 896         }
 897
 898         /* now wait for the port to be completely opened */
 899         wait_event_timeout(edge_port->wait_open, !edge_port->openPending,
 900                                                                 OPEN_TIMEOUT);
 901
 902         if (!edge_port->open) {
 903                 /* open timed out */
 904                 dev_dbg(dev, "%s - open timedout\n", __func__);
 905                 edge_port->openPending = false;
 906                 return -ENODEV;
 907         }
 908
 909         /* create the txfifo */
 910         edge_port->txfifo.head  = 0;
 911         edge_port->txfifo.tail  = 0;
 912         edge_port->txfifo.count = 0;
 913         edge_port->txfifo.size  = edge_port->maxTxCredits;
 914         edge_port->txfifo.fifo  = kmalloc(edge_port->maxTxCredits, GFP_KERNEL);
 915
 916         if (!edge_port->txfifo.fifo) {
 917                 edge_close(port);
 918                 return -ENOMEM;
 919         }
 920
 921         /* Allocate a URB for the write */
 922         edge_port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 923         edge_port->write_in_progress = false;
 924
 925         if (!edge_port->write_urb) {
 926                 edge_close(port);
 927                 return -ENOMEM;
 928         }
 929
 930         dev_dbg(dev, "%s - Initialize TX fifo to %d bytes\n",
 931                 __func__, edge_port->maxTxCredits);
 932
 933         return 0;
 934 }
 935
 936
 937 /************************************************************************
 938  *
 939  * block_until_chase_response
 940  *
 941  *      This function will block the close until one of the following:
 942  *              1. Response to our Chase comes from Edgeport
 943  *              2. A timeout of 10 seconds without activity has expired
 944  *                 (1K of Edgeport data @ 2400 baud ==> 4 sec to empty)
 945  *
 946  ************************************************************************/
 947 static void block_until_chase_response(struct edgeport_port *edge_port)
 948 {
 949         struct device *dev = &edge_port->port->dev;
 950         DEFINE_WAIT(wait);
 951         __u16 lastCredits;
 952         int timeout = 1*HZ;
 953         int loop = 10;
 954
 955         while (1) {
 956                 /* Save Last credits */
 957                 lastCredits = edge_port->txCredits;
 958
 959                 /* Did we get our Chase response */
 960                 if (!edge_port->chaseResponsePending) {
 961                         dev_dbg(dev, "%s - Got Chase Response\n", __func__);
 962
 963                         /* did we get all of our credit back? */
 964                         if (edge_port->txCredits == edge_port->maxTxCredits) {
 965                                 dev_dbg(dev, "%s - Got all credits\n", __func__);
 966                                 return;
 967                         }
 968                 }
 969
 970                 /* Block the thread for a while */
 971                 prepare_to_wait(&edge_port->wait_chase, &wait,
 972                                                 TASK_UNINTERRUPTIBLE);
 973                 schedule_timeout(timeout);
 974                 finish_wait(&edge_port->wait_chase, &wait);
 975
 976                 if (lastCredits == edge_port->txCredits) {
 977                         /* No activity.. count down. */
 978                         loop--;
 979                         if (loop == 0) {
 980                                 edge_port->chaseResponsePending = false;
 981                                 dev_dbg(dev, "%s - Chase TIMEOUT\n", __func__);
 982                                 return;
 983                         }
 984                 } else {
 985                         /* Reset timeout value back to 10 seconds */
 986                         dev_dbg(dev, "%s - Last %d, Current %d\n", __func__,
 987                                         lastCredits, edge_port->txCredits);
 988                         loop = 10;
 989                 }
 990         }
 991 }
 992
 993
 994 /************************************************************************
 995  *
 996  * block_until_tx_empty
 997  *
 998  *      This function will block the close until one of the following:
 999  *              1. TX count are 0
1000  *              2. The edgeport has stopped
1001  *              3. A timeout of 3 seconds without activity has expired
1002  *
1003  ************************************************************************/
1004 static void block_until_tx_empty(struct edgeport_port *edge_port)
1005 {
1006         struct device *dev = &edge_port->port->dev;
1007         DEFINE_WAIT(wait);
1008         struct TxFifo *fifo = &edge_port->txfifo;
1009         __u32 lastCount;
1010         int timeout = HZ/10;
1011         int loop = 30;
1012
1013         while (1) {
1014                 /* Save Last count */
1015                 lastCount = fifo->count;
1016
1017                 /* Is the Edgeport Buffer empty? */
1018                 if (lastCount == 0) {
1019                         dev_dbg(dev, "%s - TX Buffer Empty\n", __func__);
1020                         return;
1021                 }
1022
1023                 /* Block the thread for a while */
1024                 prepare_to_wait(&edge_port->wait_chase, &wait,
1025                                                 TASK_UNINTERRUPTIBLE);
1026                 schedule_timeout(timeout);
1027                 finish_wait(&edge_port->wait_chase, &wait);
1028
1029                 dev_dbg(dev, "%s wait\n", __func__);
1030
1031                 if (lastCount == fifo->count) {
1032                         /* No activity.. count down. */
1033                         loop--;
1034                         if (loop == 0) {
1035                                 dev_dbg(dev, "%s - TIMEOUT\n", __func__);
1036                                 return;
1037                         }
1038                 } else {
1039                         /* Reset timeout value back to seconds */
1040                         loop = 30;
1041                 }
1042         }
1043 }
1044
1045
1046 /*****************************************************************************
1047  * edge_close
1048  *      this function is called by the tty driver when a port is closed
1049  *****************************************************************************/
1050 static void edge_close(struct usb_serial_port *port)
1051 {
1052         struct edgeport_serial *edge_serial;
1053         struct edgeport_port *edge_port;
1054         int status;
1055
1056         edge_serial = usb_get_serial_data(port->serial);
1057         edge_port = usb_get_serial_port_data(port);
1058         if (edge_serial == NULL || edge_port == NULL)
1059                 return;
1060
1061         /* block until tx is empty */
1062         block_until_tx_empty(edge_port);
1063
1064         edge_port->closePending = true;
1065
1066         if (!edge_serial->is_epic ||
1067             edge_serial->epic_descriptor.Supports.IOSPChase) {
1068                 /* flush and chase */
1069                 edge_port->chaseResponsePending = true;
1070
1071                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1072                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1073                 if (status == 0)
1074                         /* block until chase finished */
1075                         block_until_chase_response(edge_port);
1076                 else
1077                         edge_port->chaseResponsePending = false;
1078         }
1079
1080         if (!edge_serial->is_epic ||
1081             edge_serial->epic_descriptor.Supports.IOSPClose) {
1082                /* close the port */
1083                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLOSE_PORT\n", __func__);
1084                 send_iosp_ext_cmd(edge_port, IOSP_CMD_CLOSE_PORT, 0);
1085         }
1086
1087         /* port->close = true; */
1088         edge_port->closePending = false;
1089         edge_port->open = false;
1090         edge_port->openPending = false;
1091
1092         usb_kill_urb(edge_port->write_urb);
1093
1094         if (edge_port->write_urb) {
1095                 /* if this urb had a transfer buffer already
1096                                 (old transfer) free it */
1097                 kfree(edge_port->write_urb->transfer_buffer);
1098                 usb_free_urb(edge_port->write_urb);
1099                 edge_port->write_urb = NULL;
1100         }
1101         kfree(edge_port->txfifo.fifo);
1102         edge_port->txfifo.fifo = NULL;
1103 }
1104
1105 /*****************************************************************************
1106  * SerialWrite
1107  *      this function is called by the tty driver when data should be written
1108  *      to the port.
1109  *      If successful, we return the number of bytes written, otherwise we
1110  *      return a negative error number.
1111  *****************************************************************************/
1112 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
1113                                         const unsigned char *data, int count)
1114 {
1115         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1116         struct TxFifo *fifo;
1117         int copySize;
1118         int bytesleft;
1119         int firsthalf;
1120         int secondhalf;
1121         unsigned long flags;
1122
1123         if (edge_port == NULL)
1124                 return -ENODEV;
1125
1126         /* get a pointer to the Tx fifo */
1127         fifo = &edge_port->txfifo;
1128
1129         spin_lock_irqsave(&edge_port->ep_lock, flags);
1130
1131         /* calculate number of bytes to put in fifo */
1132         copySize = min((unsigned int)count,
1133                                 (edge_port->txCredits - fifo->count));
1134
1135         dev_dbg(&port->dev, "%s of %d byte(s) Fifo room  %d -- will copy %d bytes\n",
1136                 __func__, count, edge_port->txCredits - fifo->count, copySize);
1137
1138         /* catch writes of 0 bytes which the tty driver likes to give us,
1139            and when txCredits is empty */
1140         if (copySize == 0) {
1141                 dev_dbg(&port->dev, "%s - copySize = Zero\n", __func__);
1142                 goto finish_write;
1143         }
1144
1145         /* queue the data
1146          * since we can never overflow the buffer we do not have to check for a
1147          * full condition
1148          *
1149          * the copy is done is two parts -- first fill to the end of the buffer
1150          * then copy the reset from the start of the buffer
1151          */
1152         bytesleft = fifo->size - fifo->head;
1153         firsthalf = min(bytesleft, copySize);
1154         dev_dbg(&port->dev, "%s - copy %d bytes of %d into fifo \n", __func__,
1155                 firsthalf, bytesleft);
1156
1157         /* now copy our data */
1158         memcpy(&fifo->fifo[fifo->head], data, firsthalf);
1159         usb_serial_debug_data(&port->dev, __func__, firsthalf, &fifo->fifo[fifo->head]);
1160
1161         /* update the index and size */
1162         fifo->head  += firsthalf;
1163         fifo->count += firsthalf;
1164
1165         /* wrap the index */
1166         if (fifo->head == fifo->size)
1167                 fifo->head = 0;
1168
1169         secondhalf = copySize-firsthalf;
1170
1171         if (secondhalf) {
1172                 dev_dbg(&port->dev, "%s - copy rest of data %d\n", __func__, secondhalf);
1173                 memcpy(&fifo->fifo[fifo->head], &data[firsthalf], secondhalf);
1174                 usb_serial_debug_data(&port->dev, __func__, secondhalf, &fifo->fifo[fifo->head]);
1175                 /* update the index and size */
1176                 fifo->count += secondhalf;
1177                 fifo->head  += secondhalf;
1178                 /* No need to check for wrap since we can not get to end of
1179                  * the fifo in this part
1180                  */
1181         }
1182
1183 finish_write:
1184         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1185
1186         send_more_port_data((struct edgeport_serial *)
1187                         usb_get_serial_data(port->serial), edge_port);
1188
1189         dev_dbg(&port->dev, "%s wrote %d byte(s) TxCredits %d, Fifo %d\n",
1190                 __func__, copySize, edge_port->txCredits, fifo->count);
1191
1192         return copySize;
1193 }
1194
1195
1196 /************************************************************************
1197  *
1198  * send_more_port_data()
1199  *
1200  *      This routine attempts to write additional UART transmit data
1201  *      to a port over the USB bulk pipe. It is called (1) when new
1202  *      data has been written to a port's TxBuffer from higher layers
1203  *      (2) when the peripheral sends us additional TxCredits indicating
1204  *      that it can accept more Tx data for a given port; and (3) when
1205  *      a bulk write completes successfully and we want to see if we
1206  *      can transmit more.
1207  *
1208  ************************************************************************/
1209 static void send_more_port_data(struct edgeport_serial *edge_serial,
1210                                         struct edgeport_port *edge_port)
1211 {
1212         struct TxFifo   *fifo = &edge_port->txfifo;
1213         struct device   *dev = &edge_port->port->dev;
1214         struct urb      *urb;
1215         unsigned char   *buffer;
1216         int             status;
1217         int             count;
1218         int             bytesleft;
1219         int             firsthalf;
1220         int             secondhalf;
1221         unsigned long   flags;
1222
1223         spin_lock_irqsave(&edge_port->ep_lock, flags);
1224
1225         if (edge_port->write_in_progress ||
1226             !edge_port->open             ||
1227             (fifo->count == 0)) {
1228                 dev_dbg(dev, "%s EXIT - fifo %d, PendingWrite = %d\n",
1229                         __func__, fifo->count, edge_port->write_in_progress);
1230                 goto exit_send;
1231         }
1232
1233         /* since the amount of data in the fifo will always fit into the
1234          * edgeport buffer we do not need to check the write length
1235          *
1236          * Do we have enough credits for this port to make it worthwhile
1237          * to bother queueing a write. If it's too small, say a few bytes,
1238          * it's better to wait for more credits so we can do a larger write.
1239          */
1240         if (edge_port->txCredits < EDGE_FW_GET_TX_CREDITS_SEND_THRESHOLD(edge_port->maxTxCredits, EDGE_FW_BULK_MAX_PACKET_SIZE)) {
1241                 dev_dbg(dev, "%s Not enough credit - fifo %d TxCredit %d\n",
1242                         __func__, fifo->count, edge_port->txCredits);
1243                 goto exit_send;
1244         }
1245
1246         /* lock this write */
1247         edge_port->write_in_progress = true;
1248
1249         /* get a pointer to the write_urb */
1250         urb = edge_port->write_urb;
1251
1252         /* make sure transfer buffer is freed */
1253         kfree(urb->transfer_buffer);
1254         urb->transfer_buffer = NULL;
1255
1256         /* build the data header for the buffer and port that we are about
1257            to send out */
1258         count = fifo->count;
1259         buffer = kmalloc(count+2, GFP_ATOMIC);
1260         if (!buffer) {
1261                 edge_port->write_in_progress = false;
1262                 goto exit_send;
1263         }
1264         buffer[0] = IOSP_BUILD_DATA_HDR1(edge_port->port->port_number, count);
1265         buffer[1] = IOSP_BUILD_DATA_HDR2(edge_port->port->port_number, count);
1266
1267         /* now copy our data */
1268         bytesleft =  fifo->size - fifo->tail;
1269         firsthalf = min(bytesleft, count);
1270         memcpy(&buffer[2], &fifo->fifo[fifo->tail], firsthalf);
1271         fifo->tail  += firsthalf;
1272         fifo->count -= firsthalf;
1273         if (fifo->tail == fifo->size)
1274                 fifo->tail = 0;
1275
1276         secondhalf = count-firsthalf;
1277         if (secondhalf) {
1278                 memcpy(&buffer[2+firsthalf], &fifo->fifo[fifo->tail],
1279                                                                 secondhalf);
1280                 fifo->tail  += secondhalf;
1281                 fifo->count -= secondhalf;
1282         }
1283
1284         if (count)
1285                 usb_serial_debug_data(&edge_port->port->dev, __func__, count, &buffer[2]);
1286
1287         /* fill up the urb with all of our data and submit it */
1288         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
1289                         usb_sndbulkpipe(edge_serial->serial->dev,
1290                                         edge_serial->bulk_out_endpoint),
1291                         buffer, count+2,
1292                         edge_bulk_out_data_callback, edge_port);
1293
1294         /* decrement the number of credits we have by the number we just sent */
1295         edge_port->txCredits -= count;
1296         edge_port->port->icount.tx += count;
1297
1298         status = usb_submit_urb(urb, GFP_ATOMIC);
1299         if (status) {
1300                 /* something went wrong */
1301                 dev_err_console(edge_port->port,
1302                         "%s - usb_submit_urb(write bulk) failed, status = %d, data lost\n",
1303                                 __func__, status);
1304                 edge_port->write_in_progress = false;
1305
1306                 /* revert the credits as something bad happened. */
1307                 edge_port->txCredits += count;
1308                 edge_port->port->icount.tx -= count;
1309         }
1310         dev_dbg(dev, "%s wrote %d byte(s) TxCredit %d, Fifo %d\n",
1311                 __func__, count, edge_port->txCredits, fifo->count);
1312
1313 exit_send:
1314         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1315 }
1316
1317
1318 /*****************************************************************************
1319  * edge_write_room
1320  *      this function is called by the tty driver when it wants to know how
1321  *      many bytes of data we can accept for a specific port.
1322  *****************************************************************************/
1323 static unsigned int edge_write_room(struct tty_struct *tty)
1324 {
1325         struct usb_serial_port *port = tty->driver_data;
1326         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1327         unsigned int room;
1328         unsigned long flags;
1329
1330         /* total of both buffers is still txCredit */
1331         spin_lock_irqsave(&edge_port->ep_lock, flags);
1332         room = edge_port->txCredits - edge_port->txfifo.count;
1333         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1334
1335         dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
1336         return room;
1337 }
1338
1339
1340 /*****************************************************************************
1341  * edge_chars_in_buffer
1342  *      this function is called by the tty driver when it wants to know how
1343  *      many bytes of data we currently have outstanding in the port (data that
1344  *      has been written, but hasn't made it out the port yet)
1345  *****************************************************************************/
1346 static unsigned int edge_chars_in_buffer(struct tty_struct *tty)
1347 {
1348         struct usb_serial_port *port = tty->driver_data;
1349         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1350         unsigned int num_chars;
1351         unsigned long flags;
1352
1353         spin_lock_irqsave(&edge_port->ep_lock, flags);
1354         num_chars = edge_port->maxTxCredits - edge_port->txCredits +
1355                                                 edge_port->txfifo.count;
1356         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1357         if (num_chars) {
1358                 dev_dbg(&port->dev, "%s - returns %u\n", __func__, num_chars);
1359         }
1360
1361         return num_chars;
1362 }
1363
1364
1365 /*****************************************************************************
1366  * SerialThrottle
1367  *      this function is called by the tty driver when it wants to stop the data
1368  *      being read from the port.
1369  *****************************************************************************/
1370 static void edge_throttle(struct tty_struct *tty)
1371 {
1372         struct usb_serial_port *port = tty->driver_data;
1373         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1374         int status;
1375
1376         if (edge_port == NULL)
1377                 return;
1378
1379         if (!edge_port->open) {
1380                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1381                 return;
1382         }
1383
1384         /* if we are implementing XON/XOFF, send the stop character */
1385         if (I_IXOFF(tty)) {
1386                 unsigned char stop_char = STOP_CHAR(tty);
1387                 status = edge_write(tty, port, &stop_char, 1);
1388                 if (status <= 0)
1389                         return;
1390         }
1391
1392         /* if we are implementing RTS/CTS, toggle that line */
1393         if (C_CRTSCTS(tty)) {
1394                 edge_port->shadowMCR &= ~MCR_RTS;
1395                 status = send_cmd_write_uart_register(edge_port, MCR,
1396                                                         edge_port->shadowMCR);
1397                 if (status != 0)
1398                         return;
1399         }
1400 }
1401
1402
1403 /*****************************************************************************
1404  * edge_unthrottle
1405  *      this function is called by the tty driver when it wants to resume the
1406  *      data being read from the port (called after SerialThrottle is called)
1407  *****************************************************************************/
1408 static void edge_unthrottle(struct tty_struct *tty)
1409 {
1410         struct usb_serial_port *port = tty->driver_data;
1411         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1412         int status;
1413
1414         if (edge_port == NULL)
1415                 return;
1416
1417         if (!edge_port->open) {
1418                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1419                 return;
1420         }
1421
1422         /* if we are implementing XON/XOFF, send the start character */
1423         if (I_IXOFF(tty)) {
1424                 unsigned char start_char = START_CHAR(tty);
1425                 status = edge_write(tty, port, &start_char, 1);
1426                 if (status <= 0)
1427                         return;
1428         }
1429         /* if we are implementing RTS/CTS, toggle that line */
1430         if (C_CRTSCTS(tty)) {
1431                 edge_port->shadowMCR |= MCR_RTS;
1432                 send_cmd_write_uart_register(edge_port, MCR,
1433                                                 edge_port->shadowMCR);
1434         }
1435 }
1436
1437
1438 /*****************************************************************************
1439  * SerialSetTermios
1440  *      this function is called by the tty driver when it wants to change
1441  * the termios structure
1442  *****************************************************************************/
1443 static void edge_set_termios(struct tty_struct *tty,
1444         struct usb_serial_port *port, struct ktermios *old_termios)
1445 {
1446         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1447
1448         if (edge_port == NULL)
1449                 return;
1450
1451         if (!edge_port->open) {
1452                 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1453                 return;
1454         }
1455
1456         /* change the port settings to the new ones specified */
1457         change_port_settings(tty, edge_port, old_termios);
1458 }
1459
1460
1461 /*****************************************************************************
1462  * get_lsr_info - get line status register info
1463  *
1464  * Purpose: Let user call ioctl() to get info when the UART physically
1465  *          is emptied.  On bus types like RS485, the transmitter must
1466  *          release the bus after transmitting. This must be done when
1467  *          the transmit shift register is empty, not be done when the
1468  *          transmit holding register is empty.  This functionality
1469  *          allows an RS485 driver to be written in user space.
1470  *****************************************************************************/
1471 static int get_lsr_info(struct edgeport_port *edge_port,
1472                                                 unsigned int __user *value)
1473 {
1474         unsigned int result = 0;
1475         unsigned long flags;
1476
1477         spin_lock_irqsave(&edge_port->ep_lock, flags);
1478         if (edge_port->maxTxCredits == edge_port->txCredits &&
1479             edge_port->txfifo.count == 0) {
1480                 dev_dbg(&edge_port->port->dev, "%s -- Empty\n", __func__);
1481                 result = TIOCSER_TEMT;
1482         }
1483         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1484
1485         if (copy_to_user(value, &result, sizeof(int)))
1486                 return -EFAULT;
1487         return 0;
1488 }
1489
1490 static int edge_tiocmset(struct tty_struct *tty,
1491                                         unsigned int set, unsigned int clear)
1492 {
1493         struct usb_serial_port *port = tty->driver_data;
1494         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1495         unsigned int mcr;
1496
1497         mcr = edge_port->shadowMCR;
1498         if (set & TIOCM_RTS)
1499                 mcr |= MCR_RTS;
1500         if (set & TIOCM_DTR)
1501                 mcr |= MCR_DTR;
1502         if (set & TIOCM_LOOP)
1503                 mcr |= MCR_LOOPBACK;
1504
1505         if (clear & TIOCM_RTS)
1506                 mcr &= ~MCR_RTS;
1507         if (clear & TIOCM_DTR)
1508                 mcr &= ~MCR_DTR;
1509         if (clear & TIOCM_LOOP)
1510                 mcr &= ~MCR_LOOPBACK;
1511
1512         edge_port->shadowMCR = mcr;
1513
1514         send_cmd_write_uart_register(edge_port, MCR, edge_port->shadowMCR);
1515
1516         return 0;
1517 }
1518
1519 static int edge_tiocmget(struct tty_struct *tty)
1520 {
1521         struct usb_serial_port *port = tty->driver_data;
1522         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1523         unsigned int result = 0;
1524         unsigned int msr;
1525         unsigned int mcr;
1526
1527         msr = edge_port->shadowMSR;
1528         mcr = edge_port->shadowMCR;
1529         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
1530                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
1531                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
1532                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
1533                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
1534                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
1535
1536         return result;
1537 }
1538
1539 /*****************************************************************************
1540  * SerialIoctl
1541  *      this function handles any ioctl calls to the driver
1542  *****************************************************************************/
1543 static int edge_ioctl(struct tty_struct *tty,
1544                                         unsigned int cmd, unsigned long arg)
1545 {
1546         struct usb_serial_port *port = tty->driver_data;
1547         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1548
1549         switch (cmd) {
1550         case TIOCSERGETLSR:
1551                 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
1552                 return get_lsr_info(edge_port, (unsigned int __user *) arg);
1553         }
1554         return -ENOIOCTLCMD;
1555 }
1556
1557
1558 /*****************************************************************************
1559  * SerialBreak
1560  *      this function sends a break to the port
1561  *****************************************************************************/
1562 static void edge_break(struct tty_struct *tty, int break_state)
1563 {
1564         struct usb_serial_port *port = tty->driver_data;
1565         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1566         struct edgeport_serial *edge_serial = usb_get_serial_data(port->serial);
1567         int status;
1568
1569         if (!edge_serial->is_epic ||
1570             edge_serial->epic_descriptor.Supports.IOSPChase) {
1571                 /* flush and chase */
1572                 edge_port->chaseResponsePending = true;
1573
1574                 dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CHASE_PORT\n", __func__);
1575                 status = send_iosp_ext_cmd(edge_port, IOSP_CMD_CHASE_PORT, 0);
1576                 if (status == 0) {
1577                         /* block until chase finished */
1578                         block_until_chase_response(edge_port);
1579                 } else {
1580                         edge_port->chaseResponsePending = false;
1581                 }
1582         }
1583
1584         if (!edge_serial->is_epic ||
1585             edge_serial->epic_descriptor.Supports.IOSPSetClrBreak) {
1586                 if (break_state == -1) {
1587                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_SET_BREAK\n", __func__);
1588                         status = send_iosp_ext_cmd(edge_port,
1589                                                 IOSP_CMD_SET_BREAK, 0);
1590                 } else {
1591                         dev_dbg(&port->dev, "%s - Sending IOSP_CMD_CLEAR_BREAK\n", __func__);
1592                         status = send_iosp_ext_cmd(edge_port,
1593                                                 IOSP_CMD_CLEAR_BREAK, 0);
1594                 }
1595                 if (status)
1596                         dev_dbg(&port->dev, "%s - error sending break set/clear command.\n",
1597                                 __func__);
1598         }
1599 }
1600
1601
1602 /*****************************************************************************
1603  * process_rcvd_data
1604  *      this function handles the data received on the bulk in pipe.
1605  *****************************************************************************/
1606 static void process_rcvd_data(struct edgeport_serial *edge_serial,
1607                                 unsigned char *buffer, __u16 bufferLength)
1608 {
1609         struct usb_serial *serial = edge_serial->serial;
1610         struct device *dev = &serial->dev->dev;
1611         struct usb_serial_port *port;
1612         struct edgeport_port *edge_port;
1613         __u16 lastBufferLength;
1614         __u16 rxLen;
1615
1616         lastBufferLength = bufferLength + 1;
1617
1618         while (bufferLength > 0) {
1619                 /* failsafe incase we get a message that we don't understand */
1620                 if (lastBufferLength == bufferLength) {
1621                         dev_dbg(dev, "%s - stuck in loop, exiting it.\n", __func__);
1622                         break;
1623                 }
1624                 lastBufferLength = bufferLength;
1625
1626                 switch (edge_serial->rxState) {
1627                 case EXPECT_HDR1:
1628                         edge_serial->rxHeader1 = *buffer;
1629                         ++buffer;
1630                         --bufferLength;
1631
1632                         if (bufferLength == 0) {
1633                                 edge_serial->rxState = EXPECT_HDR2;
1634                                 break;
1635                         }
1636                         fallthrough;
1637                 case EXPECT_HDR2:
1638                         edge_serial->rxHeader2 = *buffer;
1639                         ++buffer;
1640                         --bufferLength;
1641
1642                         dev_dbg(dev, "%s - Hdr1=%02X Hdr2=%02X\n", __func__,
1643                                 edge_serial->rxHeader1, edge_serial->rxHeader2);
1644                         /* Process depending on whether this header is
1645                          * data or status */
1646
1647                         if (IS_CMD_STAT_HDR(edge_serial->rxHeader1)) {
1648                                 /* Decode this status header and go to
1649                                  * EXPECT_HDR1 (if we can process the status
1650                                  * with only 2 bytes), or go to EXPECT_HDR3 to
1651                                  * get the third byte. */
1652                                 edge_serial->rxPort =
1653                                     IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1654                                 edge_serial->rxStatusCode =
1655                                     IOSP_GET_STATUS_CODE(
1656                                                 edge_serial->rxHeader1);
1657
1658                                 if (!IOSP_STATUS_IS_2BYTE(
1659                                                 edge_serial->rxStatusCode)) {
1660                                         /* This status needs additional bytes.
1661                                          * Save what we have and then wait for
1662                                          * more data.
1663                                          */
1664                                         edge_serial->rxStatusParam
1665                                                 = edge_serial->rxHeader2;
1666                                         edge_serial->rxState = EXPECT_HDR3;
1667                                         break;
1668                                 }
1669                                 /* We have all the header bytes, process the
1670                                    status now */
1671                                 process_rcvd_status(edge_serial,
1672                                                 edge_serial->rxHeader2, 0);
1673                                 edge_serial->rxState = EXPECT_HDR1;
1674                                 break;
1675                         }
1676
1677                         edge_serial->rxPort = IOSP_GET_HDR_PORT(edge_serial->rxHeader1);
1678                         edge_serial->rxBytesRemaining = IOSP_GET_HDR_DATA_LEN(edge_serial->rxHeader1,
1679                                                                               edge_serial->rxHeader2);
1680                         dev_dbg(dev, "%s - Data for Port %u Len %u\n", __func__,
1681                                 edge_serial->rxPort,
1682                                 edge_serial->rxBytesRemaining);
1683
1684                         if (bufferLength == 0) {
1685                                 edge_serial->rxState = EXPECT_DATA;
1686                                 break;
1687                         }
1688                         fallthrough;
1689                 case EXPECT_DATA: /* Expect data */
1690                         if (bufferLength < edge_serial->rxBytesRemaining) {
1691                                 rxLen = bufferLength;
1692                                 /* Expect data to start next buffer */
1693                                 edge_serial->rxState = EXPECT_DATA;
1694                         } else {
1695                                 /* BufLen >= RxBytesRemaining */
1696                                 rxLen = edge_serial->rxBytesRemaining;
1697                                 /* Start another header next time */
1698                                 edge_serial->rxState = EXPECT_HDR1;
1699                         }
1700
1701                         bufferLength -= rxLen;
1702                         edge_serial->rxBytesRemaining -= rxLen;
1703
1704                         /* spit this data back into the tty driver if this
1705                            port is open */
1706                         if (rxLen && edge_serial->rxPort < serial->num_ports) {
1707                                 port = serial->port[edge_serial->rxPort];
1708                                 edge_port = usb_get_serial_port_data(port);
1709                                 if (edge_port && edge_port->open) {
1710                                         dev_dbg(dev, "%s - Sending %d bytes to TTY for port %d\n",
1711                                                 __func__, rxLen,
1712                                                 edge_serial->rxPort);
1713                                         edge_tty_recv(edge_port->port, buffer,
1714                                                         rxLen);
1715                                         edge_port->port->icount.rx += rxLen;
1716                                 }
1717                         }
1718                         buffer += rxLen;
1719                         break;
1720
1721                 case EXPECT_HDR3:       /* Expect 3rd byte of status header */
1722                         edge_serial->rxHeader3 = *buffer;
1723                         ++buffer;
1724                         --bufferLength;
1725
1726                         /* We have all the header bytes, process the
1727                            status now */
1728                         process_rcvd_status(edge_serial,
1729                                 edge_serial->rxStatusParam,
1730                                 edge_serial->rxHeader3);
1731                         edge_serial->rxState = EXPECT_HDR1;
1732                         break;
1733                 }
1734         }
1735 }
1736
1737
1738 /*****************************************************************************
1739  * process_rcvd_status
1740  *      this function handles the any status messages received on the
1741  *      bulk in pipe.
1742  *****************************************************************************/
1743 static void process_rcvd_status(struct edgeport_serial *edge_serial,
1744                                                 __u8 byte2, __u8 byte3)
1745 {
1746         struct usb_serial_port *port;
1747         struct edgeport_port *edge_port;
1748         struct tty_struct *tty;
1749         struct device *dev;
1750         __u8 code = edge_serial->rxStatusCode;
1751
1752         /* switch the port pointer to the one being currently talked about */
1753         if (edge_serial->rxPort >= edge_serial->serial->num_ports)
1754                 return;
1755         port = edge_serial->serial->port[edge_serial->rxPort];
1756         edge_port = usb_get_serial_port_data(port);
1757         if (edge_port == NULL) {
1758                 dev_err(&edge_serial->serial->dev->dev,
1759                         "%s - edge_port == NULL for port %d\n",
1760                                         __func__, edge_serial->rxPort);
1761                 return;
1762         }
1763         dev = &port->dev;
1764
1765         if (code == IOSP_EXT_STATUS) {
1766                 switch (byte2) {
1767                 case IOSP_EXT_STATUS_CHASE_RSP:
1768                         /* we want to do EXT status regardless of port
1769                          * open/closed */
1770                         dev_dbg(dev, "%s - Port %u EXT CHASE_RSP Data = %02x\n",
1771                                 __func__, edge_serial->rxPort, byte3);
1772                         /* Currently, the only EXT_STATUS is Chase, so process
1773                          * here instead of one more call to one more subroutine
1774                          * If/when more EXT_STATUS, there'll be more work to do
1775                          * Also, we currently clear flag and close the port
1776                          * regardless of content of above's Byte3.
1777                          * We could choose to do something else when Byte3 says
1778                          * Timeout on Chase from Edgeport, like wait longer in
1779                          * block_until_chase_response, but for now we don't.
1780                          */
1781                         edge_port->chaseResponsePending = false;
1782                         wake_up(&edge_port->wait_chase);
1783                         return;
1784
1785                 case IOSP_EXT_STATUS_RX_CHECK_RSP:
1786                         dev_dbg(dev, "%s ========== Port %u CHECK_RSP Sequence = %02x =============\n",
1787                                 __func__, edge_serial->rxPort, byte3);
1788                         /* Port->RxCheckRsp = true; */
1789                         return;
1790                 }
1791         }
1792
1793         if (code == IOSP_STATUS_OPEN_RSP) {
1794                 edge_port->txCredits = GET_TX_BUFFER_SIZE(byte3);
1795                 edge_port->maxTxCredits = edge_port->txCredits;
1796                 dev_dbg(dev, "%s - Port %u Open Response Initial MSR = %02x TxBufferSize = %d\n",
1797                         __func__, edge_serial->rxPort, byte2, edge_port->txCredits);
1798                 handle_new_msr(edge_port, byte2);
1799
1800                 /* send the current line settings to the port so we are
1801                    in sync with any further termios calls */
1802                 tty = tty_port_tty_get(&edge_port->port->port);
1803                 if (tty) {
1804                         change_port_settings(tty,
1805                                 edge_port, &tty->termios);
1806                         tty_kref_put(tty);
1807                 }
1808
1809                 /* we have completed the open */
1810                 edge_port->openPending = false;
1811                 edge_port->open = true;
1812                 wake_up(&edge_port->wait_open);
1813                 return;
1814         }
1815
1816         /* If port is closed, silently discard all rcvd status. We can
1817          * have cases where buffered status is received AFTER the close
1818          * port command is sent to the Edgeport.
1819          */
1820         if (!edge_port->open || edge_port->closePending)
1821                 return;
1822
1823         switch (code) {
1824         /* Not currently sent by Edgeport */
1825         case IOSP_STATUS_LSR:
1826                 dev_dbg(dev, "%s - Port %u LSR Status = %02x\n",
1827                         __func__, edge_serial->rxPort, byte2);
1828                 handle_new_lsr(edge_port, false, byte2, 0);
1829                 break;
1830
1831         case IOSP_STATUS_LSR_DATA:
1832                 dev_dbg(dev, "%s - Port %u LSR Status = %02x, Data = %02x\n",
1833                         __func__, edge_serial->rxPort, byte2, byte3);
1834                 /* byte2 is LSR Register */
1835                 /* byte3 is broken data byte */
1836                 handle_new_lsr(edge_port, true, byte2, byte3);
1837                 break;
1838         /*
1839          *      case IOSP_EXT_4_STATUS:
1840          *              dev_dbg(dev, "%s - Port %u LSR Status = %02x Data = %02x\n",
1841          *                      __func__, edge_serial->rxPort, byte2, byte3);
1842          *              break;
1843          */
1844         case IOSP_STATUS_MSR:
1845                 dev_dbg(dev, "%s - Port %u MSR Status = %02x\n",
1846                         __func__, edge_serial->rxPort, byte2);
1847                 /*
1848                  * Process this new modem status and generate appropriate
1849                  * events, etc, based on the new status. This routine
1850                  * also saves the MSR in Port->ShadowMsr.
1851                  */
1852                 handle_new_msr(edge_port, byte2);
1853                 break;
1854
1855         default:
1856                 dev_dbg(dev, "%s - Unrecognized IOSP status code %u\n", __func__, code);
1857                 break;
1858         }
1859 }
1860
1861
1862 /*****************************************************************************
1863  * edge_tty_recv
1864  *      this function passes data on to the tty flip buffer
1865  *****************************************************************************/
1866 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1867                 int length)
1868 {
1869         int cnt;
1870
1871         cnt = tty_insert_flip_string(&port->port, data, length);
1872         if (cnt < length) {
1873                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1874                                 __func__, length - cnt);
1875         }
1876         data += cnt;
1877         length -= cnt;
1878
1879         tty_flip_buffer_push(&port->port);
1880 }
1881
1882
1883 /*****************************************************************************
1884  * handle_new_msr
1885  *      this function handles any change to the msr register for a port.
1886  *****************************************************************************/
1887 static void handle_new_msr(struct edgeport_port *edge_port, __u8 newMsr)
1888 {
1889         struct  async_icount *icount;
1890
1891         if (newMsr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1892                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1893                 icount = &edge_port->port->icount;
1894
1895                 /* update input line counters */
1896                 if (newMsr & EDGEPORT_MSR_DELTA_CTS)
1897                         icount->cts++;
1898                 if (newMsr & EDGEPORT_MSR_DELTA_DSR)
1899                         icount->dsr++;
1900                 if (newMsr & EDGEPORT_MSR_DELTA_CD)
1901                         icount->dcd++;
1902                 if (newMsr & EDGEPORT_MSR_DELTA_RI)
1903                         icount->rng++;
1904                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1905         }
1906
1907         /* Save the new modem status */
1908         edge_port->shadowMSR = newMsr & 0xf0;
1909 }
1910
1911
1912 /*****************************************************************************
1913  * handle_new_lsr
1914  *      this function handles any change to the lsr register for a port.
1915  *****************************************************************************/
1916 static void handle_new_lsr(struct edgeport_port *edge_port, __u8 lsrData,
1917                                                         __u8 lsr, __u8 data)
1918 {
1919         __u8 newLsr = (__u8) (lsr & (__u8)
1920                 (LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1921         struct async_icount *icount;
1922
1923         edge_port->shadowLSR = lsr;
1924
1925         if (newLsr & LSR_BREAK) {
1926                 /*
1927                  * Parity and Framing errors only count if they
1928                  * occur exclusive of a break being
1929                  * received.
1930                  */
1931                 newLsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1932         }
1933
1934         /* Place LSR data byte into Rx buffer */
1935         if (lsrData)
1936                 edge_tty_recv(edge_port->port, &data, 1);
1937
1938         /* update input line counters */
1939         icount = &edge_port->port->icount;
1940         if (newLsr & LSR_BREAK)
1941                 icount->brk++;
1942         if (newLsr & LSR_OVER_ERR)
1943                 icount->overrun++;
1944         if (newLsr & LSR_PAR_ERR)
1945                 icount->parity++;
1946         if (newLsr & LSR_FRM_ERR)
1947                 icount->frame++;
1948 }
1949
1950
1951 /****************************************************************************
1952  * sram_write
1953  *      writes a number of bytes to the Edgeport device's sram starting at the
1954  *      given address.
1955  *      If successful returns the number of bytes written, otherwise it returns
1956  *      a negative error number of the problem.
1957  ****************************************************************************/
1958 static int sram_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
1959                                         __u16 length, const __u8 *data)
1960 {
1961         int result;
1962         __u16 current_length;
1963         unsigned char *transfer_buffer;
1964
1965         dev_dbg(&serial->dev->dev, "%s - %x, %x, %d\n", __func__, extAddr, addr, length);
1966
1967         transfer_buffer =  kmalloc(64, GFP_KERNEL);
1968         if (!transfer_buffer)
1969                 return -ENOMEM;
1970
1971         /* need to split these writes up into 64 byte chunks */
1972         result = 0;
1973         while (length > 0) {
1974                 if (length > 64)
1975                         current_length = 64;
1976                 else
1977                         current_length = length;
1978
1979 /*              dev_dbg(&serial->dev->dev, "%s - writing %x, %x, %d\n", __func__, extAddr, addr, current_length); */
1980                 memcpy(transfer_buffer, data, current_length);
1981                 result = usb_control_msg(serial->dev,
1982                                         usb_sndctrlpipe(serial->dev, 0),
1983                                         USB_REQUEST_ION_WRITE_RAM,
1984                                         0x40, addr, extAddr, transfer_buffer,
1985                                         current_length, 300);
1986                 if (result < 0)
1987                         break;
1988                 length -= current_length;
1989                 addr += current_length;
1990                 data += current_length;
1991         }
1992
1993         kfree(transfer_buffer);
1994         return result;
1995 }
1996
1997
1998 /****************************************************************************
1999  * rom_write
2000  *      writes a number of bytes to the Edgeport device's ROM starting at the
2001  *      given address.
2002  *      If successful returns the number of bytes written, otherwise it returns
2003  *      a negative error number of the problem.
2004  ****************************************************************************/
2005 static int rom_write(struct usb_serial *serial, __u16 extAddr, __u16 addr,
2006                                         __u16 length, const __u8 *data)
2007 {
2008         int result;
2009         __u16 current_length;
2010         unsigned char *transfer_buffer;
2011
2012         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2013         if (!transfer_buffer)
2014                 return -ENOMEM;
2015
2016         /* need to split these writes up into 64 byte chunks */
2017         result = 0;
2018         while (length > 0) {
2019                 if (length > 64)
2020                         current_length = 64;
2021                 else
2022                         current_length = length;
2023                 memcpy(transfer_buffer, data, current_length);
2024                 result = usb_control_msg(serial->dev,
2025                                         usb_sndctrlpipe(serial->dev, 0),
2026                                         USB_REQUEST_ION_WRITE_ROM, 0x40,
2027                                         addr, extAddr,
2028                                         transfer_buffer, current_length, 300);
2029                 if (result < 0)
2030                         break;
2031                 length -= current_length;
2032                 addr += current_length;
2033                 data += current_length;
2034         }
2035
2036         kfree(transfer_buffer);
2037         return result;
2038 }
2039
2040
2041 /****************************************************************************
2042  * rom_read
2043  *      reads a number of bytes from the Edgeport device starting at the given
2044  *      address.
2045  *      Returns zero on success or a negative error number.
2046  ****************************************************************************/
2047 static int rom_read(struct usb_serial *serial, __u16 extAddr,
2048                                         __u16 addr, __u16 length, __u8 *data)
2049 {
2050         int result;
2051         __u16 current_length;
2052         unsigned char *transfer_buffer;
2053
2054         transfer_buffer =  kmalloc(64, GFP_KERNEL);
2055         if (!transfer_buffer)
2056                 return -ENOMEM;
2057
2058         /* need to split these reads up into 64 byte chunks */
2059         result = 0;
2060         while (length > 0) {
2061                 if (length > 64)
2062                         current_length = 64;
2063                 else
2064                         current_length = length;
2065                 result = usb_control_msg(serial->dev,
2066                                         usb_rcvctrlpipe(serial->dev, 0),
2067                                         USB_REQUEST_ION_READ_ROM,
2068                                         0xC0, addr, extAddr, transfer_buffer,
2069                                         current_length, 300);
2070                 if (result < current_length) {
2071                         if (result >= 0)
2072                                 result = -EIO;
2073                         break;
2074                 }
2075                 memcpy(data, transfer_buffer, current_length);
2076                 length -= current_length;
2077                 addr += current_length;
2078                 data += current_length;
2079
2080                 result = 0;
2081         }
2082
2083         kfree(transfer_buffer);
2084         return result;
2085 }
2086
2087
2088 /****************************************************************************
2089  * send_iosp_ext_cmd
2090  *      Is used to send a IOSP message to the Edgeport device
2091  ****************************************************************************/
2092 static int send_iosp_ext_cmd(struct edgeport_port *edge_port,
2093                                                 __u8 command, __u8 param)
2094 {
2095         unsigned char   *buffer;
2096         unsigned char   *currentCommand;
2097         int             length = 0;
2098         int             status = 0;
2099
2100         buffer = kmalloc(10, GFP_ATOMIC);
2101         if (!buffer)
2102                 return -ENOMEM;
2103
2104         currentCommand = buffer;
2105
2106         MAKE_CMD_EXT_CMD(&currentCommand, &length, edge_port->port->port_number,
2107                          command, param);
2108
2109         status = write_cmd_usb(edge_port, buffer, length);
2110         if (status) {
2111                 /* something bad happened, let's free up the memory */
2112                 kfree(buffer);
2113         }
2114
2115         return status;
2116 }
2117
2118
2119 /*****************************************************************************
2120  * write_cmd_usb
2121  *      this function writes the given buffer out to the bulk write endpoint.
2122  *****************************************************************************/
2123 static int write_cmd_usb(struct edgeport_port *edge_port,
2124                                         unsigned char *buffer, int length)
2125 {
2126         struct edgeport_serial *edge_serial =
2127                                 usb_get_serial_data(edge_port->port->serial);
2128         struct device *dev = &edge_port->port->dev;
2129         int status = 0;
2130         struct urb *urb;
2131
2132         usb_serial_debug_data(dev, __func__, length, buffer);
2133
2134         /* Allocate our next urb */
2135         urb = usb_alloc_urb(0, GFP_ATOMIC);
2136         if (!urb)
2137                 return -ENOMEM;
2138
2139         atomic_inc(&CmdUrbs);
2140         dev_dbg(dev, "%s - ALLOCATE URB %p (outstanding %d)\n",
2141                 __func__, urb, atomic_read(&CmdUrbs));
2142
2143         usb_fill_bulk_urb(urb, edge_serial->serial->dev,
2144                         usb_sndbulkpipe(edge_serial->serial->dev,
2145                                         edge_serial->bulk_out_endpoint),
2146                         buffer, length, edge_bulk_out_cmd_callback, edge_port);
2147
2148         edge_port->commandPending = true;
2149         status = usb_submit_urb(urb, GFP_ATOMIC);
2150
2151         if (status) {
2152                 /* something went wrong */
2153                 dev_err(dev, "%s - usb_submit_urb(write command) failed, status = %d\n",
2154                         __func__, status);
2155                 usb_free_urb(urb);
2156                 atomic_dec(&CmdUrbs);
2157                 return status;
2158         }
2159
2160 #if 0
2161         wait_event(&edge_port->wait_command, !edge_port->commandPending);
2162
2163         if (edge_port->commandPending) {
2164                 /* command timed out */
2165                 dev_dbg(dev, "%s - command timed out\n", __func__);
2166                 status = -EINVAL;
2167         }
2168 #endif
2169         return status;
2170 }
2171
2172
2173 /*****************************************************************************
2174  * send_cmd_write_baud_rate
2175  *      this function sends the proper command to change the baud rate of the
2176  *      specified port.
2177  *****************************************************************************/
2178 static int send_cmd_write_baud_rate(struct edgeport_port *edge_port,
2179                                                                 int baudRate)
2180 {
2181         struct edgeport_serial *edge_serial =
2182                                 usb_get_serial_data(edge_port->port->serial);
2183         struct device *dev = &edge_port->port->dev;
2184         unsigned char *cmdBuffer;
2185         unsigned char *currCmd;
2186         int cmdLen = 0;
2187         int divisor;
2188         int status;
2189         u32 number = edge_port->port->port_number;
2190
2191         if (edge_serial->is_epic &&
2192             !edge_serial->epic_descriptor.Supports.IOSPSetBaudRate) {
2193                 dev_dbg(dev, "SendCmdWriteBaudRate - NOT Setting baud rate for port, baud = %d\n",
2194                         baudRate);
2195                 return 0;
2196         }
2197
2198         dev_dbg(dev, "%s - baud = %d\n", __func__, baudRate);
2199
2200         status = calc_baud_rate_divisor(dev, baudRate, &divisor);
2201         if (status) {
2202                 dev_err(dev, "%s - bad baud rate\n", __func__);
2203                 return status;
2204         }
2205
2206         /* Alloc memory for the string of commands. */
2207         cmdBuffer =  kmalloc(0x100, GFP_ATOMIC);
2208         if (!cmdBuffer)
2209                 return -ENOMEM;
2210
2211         currCmd = cmdBuffer;
2212
2213         /* Enable access to divisor latch */
2214         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR, LCR_DL_ENABLE);
2215
2216         /* Write the divisor itself */
2217         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLL, LOW8(divisor));
2218         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, DLM, HIGH8(divisor));
2219
2220         /* Restore original value to disable access to divisor latch */
2221         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, number, LCR,
2222                                                 edge_port->shadowLCR);
2223
2224         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2225         if (status) {
2226                 /* something bad happened, let's free up the memory */
2227                 kfree(cmdBuffer);
2228         }
2229
2230         return status;
2231 }
2232
2233
2234 /*****************************************************************************
2235  * calc_baud_rate_divisor
2236  *      this function calculates the proper baud rate divisor for the specified
2237  *      baud rate.
2238  *****************************************************************************/
2239 static int calc_baud_rate_divisor(struct device *dev, int baudrate, int *divisor)
2240 {
2241         int i;
2242         __u16 custom;
2243
2244         for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
2245                 if (divisor_table[i].BaudRate == baudrate) {
2246                         *divisor = divisor_table[i].Divisor;
2247                         return 0;
2248                 }
2249         }
2250
2251         /* We have tried all of the standard baud rates
2252          * lets try to calculate the divisor for this baud rate
2253          * Make sure the baud rate is reasonable */
2254         if (baudrate > 50 && baudrate < 230400) {
2255                 /* get divisor */
2256                 custom = (__u16)((230400L + baudrate/2) / baudrate);
2257
2258                 *divisor = custom;
2259
2260                 dev_dbg(dev, "%s - Baud %d = %d\n", __func__, baudrate, custom);
2261                 return 0;
2262         }
2263
2264         return -1;
2265 }
2266
2267
2268 /*****************************************************************************
2269  * send_cmd_write_uart_register
2270  *  this function builds up a uart register message and sends to the device.
2271  *****************************************************************************/
2272 static int send_cmd_write_uart_register(struct edgeport_port *edge_port,
2273                                                 __u8 regNum, __u8 regValue)
2274 {
2275         struct edgeport_serial *edge_serial =
2276                                 usb_get_serial_data(edge_port->port->serial);
2277         struct device *dev = &edge_port->port->dev;
2278         unsigned char *cmdBuffer;
2279         unsigned char *currCmd;
2280         unsigned long cmdLen = 0;
2281         int status;
2282
2283         dev_dbg(dev, "%s - write to %s register 0x%02x\n",
2284                 (regNum == MCR) ? "MCR" : "LCR", __func__, regValue);
2285
2286         if (edge_serial->is_epic &&
2287             !edge_serial->epic_descriptor.Supports.IOSPWriteMCR &&
2288             regNum == MCR) {
2289                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to MCR Register\n");
2290                 return 0;
2291         }
2292
2293         if (edge_serial->is_epic &&
2294             !edge_serial->epic_descriptor.Supports.IOSPWriteLCR &&
2295             regNum == LCR) {
2296                 dev_dbg(dev, "SendCmdWriteUartReg - Not writing to LCR Register\n");
2297                 return 0;
2298         }
2299
2300         /* Alloc memory for the string of commands. */
2301         cmdBuffer = kmalloc(0x10, GFP_ATOMIC);
2302         if (cmdBuffer == NULL)
2303                 return -ENOMEM;
2304
2305         currCmd = cmdBuffer;
2306
2307         /* Build a cmd in the buffer to write the given register */
2308         MAKE_CMD_WRITE_REG(&currCmd, &cmdLen, edge_port->port->port_number,
2309                            regNum, regValue);
2310
2311         status = write_cmd_usb(edge_port, cmdBuffer, cmdLen);
2312         if (status) {
2313                 /* something bad happened, let's free up the memory */
2314                 kfree(cmdBuffer);
2315         }
2316
2317         return status;
2318 }
2319
2320
2321 /*****************************************************************************
2322  * change_port_settings
2323  *      This routine is called to set the UART on the device to match the
2324  *      specified new settings.
2325  *****************************************************************************/
2326
2327 static void change_port_settings(struct tty_struct *tty,
2328         struct edgeport_port *edge_port, struct ktermios *old_termios)
2329 {
2330         struct device *dev = &edge_port->port->dev;
2331         struct edgeport_serial *edge_serial =
2332                         usb_get_serial_data(edge_port->port->serial);
2333         int baud;
2334         unsigned cflag;
2335         __u8 mask = 0xff;
2336         __u8 lData;
2337         __u8 lParity;
2338         __u8 lStop;
2339         __u8 rxFlow;
2340         __u8 txFlow;
2341         int status;
2342
2343         if (!edge_port->open &&
2344             !edge_port->openPending) {
2345                 dev_dbg(dev, "%s - port not opened\n", __func__);
2346                 return;
2347         }
2348
2349         cflag = tty->termios.c_cflag;
2350
2351         switch (cflag & CSIZE) {
2352         case CS5:
2353                 lData = LCR_BITS_5; mask = 0x1f;
2354                 dev_dbg(dev, "%s - data bits = 5\n", __func__);
2355                 break;
2356         case CS6:
2357                 lData = LCR_BITS_6; mask = 0x3f;
2358                 dev_dbg(dev, "%s - data bits = 6\n", __func__);
2359                 break;
2360         case CS7:
2361                 lData = LCR_BITS_7; mask = 0x7f;
2362                 dev_dbg(dev, "%s - data bits = 7\n", __func__);
2363                 break;
2364         default:
2365         case CS8:
2366                 lData = LCR_BITS_8;
2367                 dev_dbg(dev, "%s - data bits = 8\n", __func__);
2368                 break;
2369         }
2370
2371         lParity = LCR_PAR_NONE;
2372         if (cflag & PARENB) {
2373                 if (cflag & CMSPAR) {
2374                         if (cflag & PARODD) {
2375                                 lParity = LCR_PAR_MARK;
2376                                 dev_dbg(dev, "%s - parity = mark\n", __func__);
2377                         } else {
2378                                 lParity = LCR_PAR_SPACE;
2379                                 dev_dbg(dev, "%s - parity = space\n", __func__);
2380                         }
2381                 } else if (cflag & PARODD) {
2382                         lParity = LCR_PAR_ODD;
2383                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2384                 } else {
2385                         lParity = LCR_PAR_EVEN;
2386                         dev_dbg(dev, "%s - parity = even\n", __func__);
2387                 }
2388         } else {
2389                 dev_dbg(dev, "%s - parity = none\n", __func__);
2390         }
2391
2392         if (cflag & CSTOPB) {
2393                 lStop = LCR_STOP_2;
2394                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2395         } else {
2396                 lStop = LCR_STOP_1;
2397                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2398         }
2399
2400         /* figure out the flow control settings */
2401         rxFlow = txFlow = 0x00;
2402         if (cflag & CRTSCTS) {
2403                 rxFlow |= IOSP_RX_FLOW_RTS;
2404                 txFlow |= IOSP_TX_FLOW_CTS;
2405                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2406         } else {
2407                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2408         }
2409
2410         /* if we are implementing XON/XOFF, set the start and stop character
2411            in the device */
2412         if (I_IXOFF(tty) || I_IXON(tty)) {
2413                 unsigned char stop_char  = STOP_CHAR(tty);
2414                 unsigned char start_char = START_CHAR(tty);
2415
2416                 if (!edge_serial->is_epic ||
2417                     edge_serial->epic_descriptor.Supports.IOSPSetXChar) {
2418                         send_iosp_ext_cmd(edge_port,
2419                                         IOSP_CMD_SET_XON_CHAR, start_char);
2420                         send_iosp_ext_cmd(edge_port,
2421                                         IOSP_CMD_SET_XOFF_CHAR, stop_char);
2422                 }
2423
2424                 /* if we are implementing INBOUND XON/XOFF */
2425                 if (I_IXOFF(tty)) {
2426                         rxFlow |= IOSP_RX_FLOW_XON_XOFF;
2427                         dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2428                                 __func__, start_char, stop_char);
2429                 } else {
2430                         dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2431                 }
2432
2433                 /* if we are implementing OUTBOUND XON/XOFF */
2434                 if (I_IXON(tty)) {
2435                         txFlow |= IOSP_TX_FLOW_XON_XOFF;
2436                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2437                                 __func__, start_char, stop_char);
2438                 } else {
2439                         dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2440                 }
2441         }
2442
2443         /* Set flow control to the configured value */
2444         if (!edge_serial->is_epic ||
2445             edge_serial->epic_descriptor.Supports.IOSPSetRxFlow)
2446                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_RX_FLOW, rxFlow);
2447         if (!edge_serial->is_epic ||
2448             edge_serial->epic_descriptor.Supports.IOSPSetTxFlow)
2449                 send_iosp_ext_cmd(edge_port, IOSP_CMD_SET_TX_FLOW, txFlow);
2450
2451
2452         edge_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2453         edge_port->shadowLCR |= (lData | lParity | lStop);
2454
2455         edge_port->validDataMask = mask;
2456
2457         /* Send the updated LCR value to the EdgePort */
2458         status = send_cmd_write_uart_register(edge_port, LCR,
2459                                                         edge_port->shadowLCR);
2460         if (status != 0)
2461                 return;
2462
2463         /* set up the MCR register and send it to the EdgePort */
2464         edge_port->shadowMCR = MCR_MASTER_IE;
2465         if (cflag & CBAUD)
2466                 edge_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2467
2468         status = send_cmd_write_uart_register(edge_port, MCR,
2469                                                 edge_port->shadowMCR);
2470         if (status != 0)
2471                 return;
2472
2473         /* Determine divisor based on baud rate */
2474         baud = tty_get_baud_rate(tty);
2475         if (!baud) {
2476                 /* pick a default, any default... */
2477                 baud = 9600;
2478         }
2479
2480         dev_dbg(dev, "%s - baud rate = %d\n", __func__, baud);
2481         status = send_cmd_write_baud_rate(edge_port, baud);
2482         if (status == -1) {
2483                 /* Speed change was not possible - put back the old speed */
2484                 baud = tty_termios_baud_rate(old_termios);
2485                 tty_encode_baud_rate(tty, baud, baud);
2486         }
2487 }
2488
2489
2490 /****************************************************************************
2491  * unicode_to_ascii
2492  *      Turns a string from Unicode into ASCII.
2493  *      Doesn't do a good job with any characters that are outside the normal
2494  *      ASCII range, but it's only for debugging...
2495  *      NOTE: expects the unicode in LE format
2496  ****************************************************************************/
2497 static void unicode_to_ascii(char *string, int buflen,
2498                                         __le16 *unicode, int unicode_size)
2499 {
2500         int i;
2501
2502         if (buflen <= 0)        /* never happens, but... */
2503                 return;
2504         --buflen;               /* space for nul */
2505
2506         for (i = 0; i < unicode_size; i++) {
2507                 if (i >= buflen)
2508                         break;
2509                 string[i] = (char)(le16_to_cpu(unicode[i]));
2510         }
2511         string[i] = 0x00;
2512 }
2513
2514
2515 /****************************************************************************
2516  * get_manufacturing_desc
2517  *      reads in the manufacturing descriptor and stores it into the serial
2518  *      structure.
2519  ****************************************************************************/
2520 static void get_manufacturing_desc(struct edgeport_serial *edge_serial)
2521 {
2522         struct device *dev = &edge_serial->serial->dev->dev;
2523         int response;
2524
2525         dev_dbg(dev, "getting manufacturer descriptor\n");
2526
2527         response = rom_read(edge_serial->serial,
2528                                 (EDGE_MANUF_DESC_ADDR & 0xffff0000) >> 16,
2529                                 (__u16)(EDGE_MANUF_DESC_ADDR & 0x0000ffff),
2530                                 EDGE_MANUF_DESC_LEN,
2531                                 (__u8 *)(&edge_serial->manuf_descriptor));
2532
2533         if (response < 0) {
2534                 dev_err(dev, "error in getting manufacturer descriptor: %d\n",
2535                                 response);
2536         } else {
2537                 char string[30];
2538                 dev_dbg(dev, "**Manufacturer Descriptor\n");
2539                 dev_dbg(dev, "  RomSize:        %dK\n",
2540                         edge_serial->manuf_descriptor.RomSize);
2541                 dev_dbg(dev, "  RamSize:        %dK\n",
2542                         edge_serial->manuf_descriptor.RamSize);
2543                 dev_dbg(dev, "  CpuRev:         %d\n",
2544                         edge_serial->manuf_descriptor.CpuRev);
2545                 dev_dbg(dev, "  BoardRev:       %d\n",
2546                         edge_serial->manuf_descriptor.BoardRev);
2547                 dev_dbg(dev, "  NumPorts:       %d\n",
2548                         edge_serial->manuf_descriptor.NumPorts);
2549                 dev_dbg(dev, "  DescDate:       %d/%d/%d\n",
2550                         edge_serial->manuf_descriptor.DescDate[0],
2551                         edge_serial->manuf_descriptor.DescDate[1],
2552                         edge_serial->manuf_descriptor.DescDate[2]+1900);
2553                 unicode_to_ascii(string, sizeof(string),
2554                         edge_serial->manuf_descriptor.SerialNumber,
2555                         edge_serial->manuf_descriptor.SerNumLength/2);
2556                 dev_dbg(dev, "  SerialNumber: %s\n", string);
2557                 unicode_to_ascii(string, sizeof(string),
2558                         edge_serial->manuf_descriptor.AssemblyNumber,
2559                         edge_serial->manuf_descriptor.AssemblyNumLength/2);
2560                 dev_dbg(dev, "  AssemblyNumber: %s\n", string);
2561                 unicode_to_ascii(string, sizeof(string),
2562                     edge_serial->manuf_descriptor.OemAssyNumber,
2563                     edge_serial->manuf_descriptor.OemAssyNumLength/2);
2564                 dev_dbg(dev, "  OemAssyNumber:  %s\n", string);
2565                 dev_dbg(dev, "  UartType:       %d\n",
2566                         edge_serial->manuf_descriptor.UartType);
2567                 dev_dbg(dev, "  IonPid:         %d\n",
2568                         edge_serial->manuf_descriptor.IonPid);
2569                 dev_dbg(dev, "  IonConfig:      %d\n",
2570                         edge_serial->manuf_descriptor.IonConfig);
2571         }
2572 }
2573
2574
2575 /****************************************************************************
2576  * get_boot_desc
2577  *      reads in the bootloader descriptor and stores it into the serial
2578  *      structure.
2579  ****************************************************************************/
2580 static void get_boot_desc(struct edgeport_serial *edge_serial)
2581 {
2582         struct device *dev = &edge_serial->serial->dev->dev;
2583         int response;
2584
2585         dev_dbg(dev, "getting boot descriptor\n");
2586
2587         response = rom_read(edge_serial->serial,
2588                                 (EDGE_BOOT_DESC_ADDR & 0xffff0000) >> 16,
2589                                 (__u16)(EDGE_BOOT_DESC_ADDR & 0x0000ffff),
2590                                 EDGE_BOOT_DESC_LEN,
2591                                 (__u8 *)(&edge_serial->boot_descriptor));
2592
2593         if (response < 0) {
2594                 dev_err(dev, "error in getting boot descriptor: %d\n",
2595                                 response);
2596         } else {
2597                 dev_dbg(dev, "**Boot Descriptor:\n");
2598                 dev_dbg(dev, "  BootCodeLength: %d\n",
2599                         le16_to_cpu(edge_serial->boot_descriptor.BootCodeLength));
2600                 dev_dbg(dev, "  MajorVersion:   %d\n",
2601                         edge_serial->boot_descriptor.MajorVersion);
2602                 dev_dbg(dev, "  MinorVersion:   %d\n",
2603                         edge_serial->boot_descriptor.MinorVersion);
2604                 dev_dbg(dev, "  BuildNumber:    %d\n",
2605                         le16_to_cpu(edge_serial->boot_descriptor.BuildNumber));
2606                 dev_dbg(dev, "  Capabilities:   0x%x\n",
2607                       le16_to_cpu(edge_serial->boot_descriptor.Capabilities));
2608                 dev_dbg(dev, "  UConfig0:       %d\n",
2609                         edge_serial->boot_descriptor.UConfig0);
2610                 dev_dbg(dev, "  UConfig1:       %d\n",
2611                         edge_serial->boot_descriptor.UConfig1);
2612         }
2613 }
2614
2615
2616 /****************************************************************************
2617  * load_application_firmware
2618  *      This is called to load the application firmware to the device
2619  ****************************************************************************/
2620 static void load_application_firmware(struct edgeport_serial *edge_serial)
2621 {
2622         struct device *dev = &edge_serial->serial->dev->dev;
2623         const struct ihex_binrec *rec;
2624         const struct firmware *fw;
2625         const char *fw_name;
2626         const char *fw_info;
2627         int response;
2628         __u32 Operaddr;
2629         __u16 build;
2630
2631         switch (edge_serial->product_info.iDownloadFile) {
2632                 case EDGE_DOWNLOAD_FILE_I930:
2633                         fw_info = "downloading firmware version (930)";
2634                         fw_name = "edgeport/down.fw";
2635                         break;
2636
2637                 case EDGE_DOWNLOAD_FILE_80251:
2638                         fw_info = "downloading firmware version (80251)";
2639                         fw_name = "edgeport/down2.fw";
2640                         break;
2641
2642                 case EDGE_DOWNLOAD_FILE_NONE:
2643                         dev_dbg(dev, "No download file specified, skipping download\n");
2644                         return;
2645
2646                 default:
2647                         return;
2648         }
2649
2650         response = request_ihex_firmware(&fw, fw_name,
2651                                     &edge_serial->serial->dev->dev);
2652         if (response) {
2653                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
2654                        fw_name, response);
2655                 return;
2656         }
2657
2658         rec = (const struct ihex_binrec *)fw->data;
2659         build = (rec->data[2] << 8) | rec->data[3];
2660
2661         dev_dbg(dev, "%s %d.%d.%d\n", fw_info, rec->data[0], rec->data[1], build);
2662
2663         edge_serial->product_info.FirmwareMajorVersion = rec->data[0];
2664         edge_serial->product_info.FirmwareMinorVersion = rec->data[1];
2665         edge_serial->product_info.FirmwareBuildNumber = cpu_to_le16(build);
2666
2667         for (rec = ihex_next_binrec(rec); rec;
2668              rec = ihex_next_binrec(rec)) {
2669                 Operaddr = be32_to_cpu(rec->addr);
2670                 response = sram_write(edge_serial->serial,
2671                                      Operaddr >> 16,
2672                                      Operaddr & 0xFFFF,
2673                                      be16_to_cpu(rec->len),
2674                                      &rec->data[0]);
2675                 if (response < 0) {
2676                         dev_err(&edge_serial->serial->dev->dev,
2677                                 "sram_write failed (%x, %x, %d)\n",
2678                                 Operaddr >> 16, Operaddr & 0xFFFF,
2679                                 be16_to_cpu(rec->len));
2680                         break;
2681                 }
2682         }
2683
2684         dev_dbg(dev, "sending exec_dl_code\n");
2685         response = usb_control_msg (edge_serial->serial->dev,
2686                                     usb_sndctrlpipe(edge_serial->serial->dev, 0),
2687                                     USB_REQUEST_ION_EXEC_DL_CODE,
2688                                     0x40, 0x4000, 0x0001, NULL, 0, 3000);
2689
2690         release_firmware(fw);
2691 }
2692
2693
2694 /****************************************************************************
2695  * edge_startup
2696  ****************************************************************************/
2697 static int edge_startup(struct usb_serial *serial)
2698 {
2699         struct edgeport_serial *edge_serial;
2700         struct usb_device *dev;
2701         struct device *ddev = &serial->dev->dev;
2702         int i;
2703         int response;
2704         bool interrupt_in_found;
2705         bool bulk_in_found;
2706         bool bulk_out_found;
2707         static const __u32 descriptor[3] = {    EDGE_COMPATIBILITY_MASK0,
2708                                                 EDGE_COMPATIBILITY_MASK1,
2709                                                 EDGE_COMPATIBILITY_MASK2 };
2710
2711         dev = serial->dev;
2712
2713         /* create our private serial structure */
2714         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2715         if (!edge_serial)
2716                 return -ENOMEM;
2717
2718         spin_lock_init(&edge_serial->es_lock);
2719         edge_serial->serial = serial;
2720         usb_set_serial_data(serial, edge_serial);
2721
2722         /* get the name for the device from the device */
2723         i = usb_string(dev, dev->descriptor.iManufacturer,
2724             &edge_serial->name[0], MAX_NAME_LEN+1);
2725         if (i < 0)
2726                 i = 0;
2727         edge_serial->name[i++] = ' ';
2728         usb_string(dev, dev->descriptor.iProduct,
2729             &edge_serial->name[i], MAX_NAME_LEN+2 - i);
2730
2731         dev_info(&serial->dev->dev, "%s detected\n", edge_serial->name);
2732
2733         /* Read the epic descriptor */
2734         if (get_epic_descriptor(edge_serial) < 0) {
2735                 /* memcpy descriptor to Supports structures */
2736                 memcpy(&edge_serial->epic_descriptor.Supports, descriptor,
2737                        sizeof(struct edge_compatibility_bits));
2738
2739                 /* get the manufacturing descriptor for this device */
2740                 get_manufacturing_desc(edge_serial);
2741
2742                 /* get the boot descriptor */
2743                 get_boot_desc(edge_serial);
2744
2745                 get_product_info(edge_serial);
2746         }
2747
2748         /* set the number of ports from the manufacturing description */
2749         /* serial->num_ports = serial->product_info.NumPorts; */
2750         if ((!edge_serial->is_epic) &&
2751             (edge_serial->product_info.NumPorts != serial->num_ports)) {
2752                 dev_warn(ddev,
2753                         "Device Reported %d serial ports vs. core thinking we have %d ports, email greg@kroah.com this information.\n",
2754                          edge_serial->product_info.NumPorts,
2755                          serial->num_ports);
2756         }
2757
2758         dev_dbg(ddev, "%s - time 1 %ld\n", __func__, jiffies);
2759
2760         /* If not an EPiC device */
2761         if (!edge_serial->is_epic) {
2762                 /* now load the application firmware into this device */
2763                 load_application_firmware(edge_serial);
2764
2765                 dev_dbg(ddev, "%s - time 2 %ld\n", __func__, jiffies);
2766
2767                 /* Check current Edgeport EEPROM and update if necessary */
2768                 update_edgeport_E2PROM(edge_serial);
2769
2770                 dev_dbg(ddev, "%s - time 3 %ld\n", __func__, jiffies);
2771
2772                 /* set the configuration to use #1 */
2773 /*              dev_dbg(ddev, "set_configuration 1\n"); */
2774 /*              usb_set_configuration (dev, 1); */
2775         }
2776         dev_dbg(ddev, "  FirmwareMajorVersion  %d.%d.%d\n",
2777             edge_serial->product_info.FirmwareMajorVersion,
2778             edge_serial->product_info.FirmwareMinorVersion,
2779             le16_to_cpu(edge_serial->product_info.FirmwareBuildNumber));
2780
2781         /* we set up the pointers to the endpoints in the edge_open function,
2782          * as the structures aren't created yet. */
2783
2784         response = 0;
2785
2786         if (edge_serial->is_epic) {
2787                 struct usb_host_interface *alt;
2788
2789                 alt = serial->interface->cur_altsetting;
2790
2791                 /* EPIC thing, set up our interrupt polling now and our read
2792                  * urb, so that the device knows it really is connected. */
2793                 interrupt_in_found = bulk_in_found = bulk_out_found = false;
2794                 for (i = 0; i < alt->desc.bNumEndpoints; ++i) {
2795                         struct usb_endpoint_descriptor *endpoint;
2796                         int buffer_size;
2797
2798                         endpoint = &alt->endpoint[i].desc;
2799                         buffer_size = usb_endpoint_maxp(endpoint);
2800                         if (!interrupt_in_found &&
2801                             (usb_endpoint_is_int_in(endpoint))) {
2802                                 /* we found a interrupt in endpoint */
2803                                 dev_dbg(ddev, "found interrupt in\n");
2804
2805                                 /* not set up yet, so do it now */
2806                                 edge_serial->interrupt_read_urb =
2807                                                 usb_alloc_urb(0, GFP_KERNEL);
2808                                 if (!edge_serial->interrupt_read_urb) {
2809                                         response = -ENOMEM;
2810                                         break;
2811                                 }
2812
2813                                 edge_serial->interrupt_in_buffer =
2814                                         kmalloc(buffer_size, GFP_KERNEL);
2815                                 if (!edge_serial->interrupt_in_buffer) {
2816                                         response = -ENOMEM;
2817                                         break;
2818                                 }
2819                                 edge_serial->interrupt_in_endpoint =
2820                                                 endpoint->bEndpointAddress;
2821
2822                                 /* set up our interrupt urb */
2823                                 usb_fill_int_urb(
2824                                         edge_serial->interrupt_read_urb,
2825                                         dev,
2826                                         usb_rcvintpipe(dev,
2827                                                 endpoint->bEndpointAddress),
2828                                         edge_serial->interrupt_in_buffer,
2829                                         buffer_size,
2830                                         edge_interrupt_callback,
2831                                         edge_serial,
2832                                         endpoint->bInterval);
2833
2834                                 interrupt_in_found = true;
2835                         }
2836
2837                         if (!bulk_in_found &&
2838                                 (usb_endpoint_is_bulk_in(endpoint))) {
2839                                 /* we found a bulk in endpoint */
2840                                 dev_dbg(ddev, "found bulk in\n");
2841
2842                                 /* not set up yet, so do it now */
2843                                 edge_serial->read_urb =
2844                                                 usb_alloc_urb(0, GFP_KERNEL);
2845                                 if (!edge_serial->read_urb) {
2846                                         response = -ENOMEM;
2847                                         break;
2848                                 }
2849
2850                                 edge_serial->bulk_in_buffer =
2851                                         kmalloc(buffer_size, GFP_KERNEL);
2852                                 if (!edge_serial->bulk_in_buffer) {
2853                                         response = -ENOMEM;
2854                                         break;
2855                                 }
2856                                 edge_serial->bulk_in_endpoint =
2857                                                 endpoint->bEndpointAddress;
2858
2859                                 /* set up our bulk in urb */
2860                                 usb_fill_bulk_urb(edge_serial->read_urb, dev,
2861                                         usb_rcvbulkpipe(dev,
2862                                                 endpoint->bEndpointAddress),
2863                                         edge_serial->bulk_in_buffer,
2864                                         usb_endpoint_maxp(endpoint),
2865                                         edge_bulk_in_callback,
2866                                         edge_serial);
2867                                 bulk_in_found = true;
2868                         }
2869
2870                         if (!bulk_out_found &&
2871                             (usb_endpoint_is_bulk_out(endpoint))) {
2872                                 /* we found a bulk out endpoint */
2873                                 dev_dbg(ddev, "found bulk out\n");
2874                                 edge_serial->bulk_out_endpoint =
2875                                                 endpoint->bEndpointAddress;
2876                                 bulk_out_found = true;
2877                         }
2878                 }
2879
2880                 if (response || !interrupt_in_found || !bulk_in_found ||
2881                                                         !bulk_out_found) {
2882                         if (!response) {
2883                                 dev_err(ddev, "expected endpoints not found\n");
2884                                 response = -ENODEV;
2885                         }
2886
2887                         goto error;
2888                 }
2889
2890                 /* start interrupt read for this edgeport this interrupt will
2891                  * continue as long as the edgeport is connected */
2892                 response = usb_submit_urb(edge_serial->interrupt_read_urb,
2893                                                                 GFP_KERNEL);
2894                 if (response) {
2895                         dev_err(ddev, "%s - Error %d submitting control urb\n",
2896                                 __func__, response);
2897
2898                         goto error;
2899                 }
2900         }
2901         return response;
2902
2903 error:
2904         usb_free_urb(edge_serial->interrupt_read_urb);
2905         kfree(edge_serial->interrupt_in_buffer);
2906
2907         usb_free_urb(edge_serial->read_urb);
2908         kfree(edge_serial->bulk_in_buffer);
2909
2910         kfree(edge_serial);
2911
2912         return response;
2913 }
2914
2915
2916 /****************************************************************************
2917  * edge_disconnect
2918  *      This function is called whenever the device is removed from the usb bus.
2919  ****************************************************************************/
2920 static void edge_disconnect(struct usb_serial *serial)
2921 {
2922         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2923
2924         if (edge_serial->is_epic) {
2925                 usb_kill_urb(edge_serial->interrupt_read_urb);
2926                 usb_kill_urb(edge_serial->read_urb);
2927         }
2928 }
2929
2930
2931 /****************************************************************************
2932  * edge_release
2933  *      This function is called when the device structure is deallocated.
2934  ****************************************************************************/
2935 static void edge_release(struct usb_serial *serial)
2936 {
2937         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2938
2939         if (edge_serial->is_epic) {
2940                 usb_kill_urb(edge_serial->interrupt_read_urb);
2941                 usb_free_urb(edge_serial->interrupt_read_urb);
2942                 kfree(edge_serial->interrupt_in_buffer);
2943
2944                 usb_kill_urb(edge_serial->read_urb);
2945                 usb_free_urb(edge_serial->read_urb);
2946                 kfree(edge_serial->bulk_in_buffer);
2947         }
2948
2949         kfree(edge_serial);
2950 }
2951
2952 static int edge_port_probe(struct usb_serial_port *port)
2953 {
2954         struct edgeport_port *edge_port;
2955
2956         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2957         if (!edge_port)
2958                 return -ENOMEM;
2959
2960         spin_lock_init(&edge_port->ep_lock);
2961         edge_port->port = port;
2962
2963         usb_set_serial_port_data(port, edge_port);
2964
2965         return 0;
2966 }
2967
2968 static void edge_port_remove(struct usb_serial_port *port)
2969 {
2970         struct edgeport_port *edge_port;
2971
2972         edge_port = usb_get_serial_port_data(port);
2973         kfree(edge_port);
2974 }
2975
2976 static struct usb_serial_driver edgeport_2port_device = {
2977         .driver = {
2978                 .owner          = THIS_MODULE,
2979                 .name           = "edgeport_2",
2980         },
2981         .description            = "Edgeport 2 port adapter",
2982         .id_table               = edgeport_2port_id_table,
2983         .num_ports              = 2,
2984         .num_bulk_in            = 1,
2985         .num_bulk_out           = 1,
2986         .num_interrupt_in       = 1,
2987         .open                   = edge_open,
2988         .close                  = edge_close,
2989         .throttle               = edge_throttle,
2990         .unthrottle             = edge_unthrottle,
2991         .attach                 = edge_startup,
2992         .disconnect             = edge_disconnect,
2993         .release                = edge_release,
2994         .port_probe             = edge_port_probe,
2995         .port_remove            = edge_port_remove,
2996         .ioctl                  = edge_ioctl,
2997         .set_termios            = edge_set_termios,
2998         .tiocmget               = edge_tiocmget,
2999         .tiocmset               = edge_tiocmset,
3000         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3001         .get_icount             = usb_serial_generic_get_icount,
3002         .write                  = edge_write,
3003         .write_room             = edge_write_room,
3004         .chars_in_buffer        = edge_chars_in_buffer,
3005         .break_ctl              = edge_break,
3006         .read_int_callback      = edge_interrupt_callback,
3007         .read_bulk_callback     = edge_bulk_in_callback,
3008         .write_bulk_callback    = edge_bulk_out_data_callback,
3009 };
3010
3011 static struct usb_serial_driver edgeport_4port_device = {
3012         .driver = {
3013                 .owner          = THIS_MODULE,
3014                 .name           = "edgeport_4",
3015         },
3016         .description            = "Edgeport 4 port adapter",
3017         .id_table               = edgeport_4port_id_table,
3018         .num_ports              = 4,
3019         .num_bulk_in            = 1,
3020         .num_bulk_out           = 1,
3021         .num_interrupt_in       = 1,
3022         .open                   = edge_open,
3023         .close                  = edge_close,
3024         .throttle               = edge_throttle,
3025         .unthrottle             = edge_unthrottle,
3026         .attach                 = edge_startup,
3027         .disconnect             = edge_disconnect,
3028         .release                = edge_release,
3029         .port_probe             = edge_port_probe,
3030         .port_remove            = edge_port_remove,
3031         .ioctl                  = edge_ioctl,
3032         .set_termios            = edge_set_termios,
3033         .tiocmget               = edge_tiocmget,
3034         .tiocmset               = edge_tiocmset,
3035         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3036         .get_icount             = usb_serial_generic_get_icount,
3037         .write                  = edge_write,
3038         .write_room             = edge_write_room,
3039         .chars_in_buffer        = edge_chars_in_buffer,
3040         .break_ctl              = edge_break,
3041         .read_int_callback      = edge_interrupt_callback,
3042         .read_bulk_callback     = edge_bulk_in_callback,
3043         .write_bulk_callback    = edge_bulk_out_data_callback,
3044 };
3045
3046 static struct usb_serial_driver edgeport_8port_device = {
3047         .driver = {
3048                 .owner          = THIS_MODULE,
3049                 .name           = "edgeport_8",
3050         },
3051         .description            = "Edgeport 8 port adapter",
3052         .id_table               = edgeport_8port_id_table,
3053         .num_ports              = 8,
3054         .num_bulk_in            = 1,
3055         .num_bulk_out           = 1,
3056         .num_interrupt_in       = 1,
3057         .open                   = edge_open,
3058         .close                  = edge_close,
3059         .throttle               = edge_throttle,
3060         .unthrottle             = edge_unthrottle,
3061         .attach                 = edge_startup,
3062         .disconnect             = edge_disconnect,
3063         .release                = edge_release,
3064         .port_probe             = edge_port_probe,
3065         .port_remove            = edge_port_remove,
3066         .ioctl                  = edge_ioctl,
3067         .set_termios            = edge_set_termios,
3068         .tiocmget               = edge_tiocmget,
3069         .tiocmset               = edge_tiocmset,
3070         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3071         .get_icount             = usb_serial_generic_get_icount,
3072         .write                  = edge_write,
3073         .write_room             = edge_write_room,
3074         .chars_in_buffer        = edge_chars_in_buffer,
3075         .break_ctl              = edge_break,
3076         .read_int_callback      = edge_interrupt_callback,
3077         .read_bulk_callback     = edge_bulk_in_callback,
3078         .write_bulk_callback    = edge_bulk_out_data_callback,
3079 };
3080
3081 static struct usb_serial_driver epic_device = {
3082         .driver = {
3083                 .owner          = THIS_MODULE,
3084                 .name           = "epic",
3085         },
3086         .description            = "EPiC device",
3087         .id_table               = Epic_port_id_table,
3088         .num_ports              = 1,
3089         .num_bulk_in            = 1,
3090         .num_bulk_out           = 1,
3091         .num_interrupt_in       = 1,
3092         .open                   = edge_open,
3093         .close                  = edge_close,
3094         .throttle               = edge_throttle,
3095         .unthrottle             = edge_unthrottle,
3096         .attach                 = edge_startup,
3097         .disconnect             = edge_disconnect,
3098         .release                = edge_release,
3099         .port_probe             = edge_port_probe,
3100         .port_remove            = edge_port_remove,
3101         .ioctl                  = edge_ioctl,
3102         .set_termios            = edge_set_termios,
3103         .tiocmget               = edge_tiocmget,
3104         .tiocmset               = edge_tiocmset,
3105         .tiocmiwait             = usb_serial_generic_tiocmiwait,
3106         .get_icount             = usb_serial_generic_get_icount,
3107         .write                  = edge_write,
3108         .write_room             = edge_write_room,
3109         .chars_in_buffer        = edge_chars_in_buffer,
3110         .break_ctl              = edge_break,
3111         .read_int_callback      = edge_interrupt_callback,
3112         .read_bulk_callback     = edge_bulk_in_callback,
3113         .write_bulk_callback    = edge_bulk_out_data_callback,
3114 };
3115
3116 static struct usb_serial_driver * const serial_drivers[] = {
3117         &edgeport_2port_device, &edgeport_4port_device,
3118         &edgeport_8port_device, &epic_device, NULL
3119 };
3120
3121 module_usb_serial_driver(serial_drivers, id_table_combined);
3122
3123 MODULE_AUTHOR(DRIVER_AUTHOR);
3124 MODULE_DESCRIPTION(DRIVER_DESC);
3125 MODULE_LICENSE("GPL");
3126 MODULE_FIRMWARE("edgeport/boot.fw");
3127 MODULE_FIRMWARE("edgeport/boot2.fw");
3128 MODULE_FIRMWARE("edgeport/down.fw");
3129 MODULE_FIRMWARE("edgeport/down2.fw");