drivers/usb/serial/io_ti.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
  14  *
  15  * For questions or problems with this driver, contact Inside Out
  16  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  17  * or Al Borchers <alborchers@steinerpoint.com>.
  18  *
  19  * Version history:
  20  *
  21  *      July 11, 2002   Removed 4 port device structure since all TI UMP
  22  *                      chips have only 2 ports
  23  *                      David Iacovelli (davidi@ionetworks.com)
  24  *
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/errno.h>
  30 #include <linux/init.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/mutex.h>
  38 #include <linux/serial.h>
  39 #include <linux/ioctl.h>
  40 #include <asm/uaccess.h>
  41 #include <linux/usb.h>
  42 #include <linux/usb/serial.h>
  43
  44 #include "io_16654.h"
  45 #include "io_usbvend.h"
  46 #include "io_ti.h"
  47
  48 /*
  49  * Version Information
  50  */
  51 #define DRIVER_VERSION "v0.7mode043006"
  52 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  53 #define DRIVER_DESC "Edgeport USB Serial Driver"
  54
  55
  56 /* firmware image code */
  57 #define IMAGE_VERSION_NAME      PagableOperationalCodeImageVersion
  58 #define IMAGE_ARRAY_NAME        PagableOperationalCodeImage
  59 #define IMAGE_SIZE              PagableOperationalCodeSize
  60 #include "io_fw_down3.h"        /* Define array OperationalCodeImage[] */
  61
  62 #define EPROM_PAGE_SIZE         64
  63
  64
  65 struct edgeport_uart_buf_desc {
  66         __u32 count;            // Number of bytes currently in buffer
  67 };
  68
  69 /* different hardware types */
  70 #define HARDWARE_TYPE_930       0
  71 #define HARDWARE_TYPE_TIUMP     1
  72
  73 // IOCTL_PRIVATE_TI_GET_MODE Definitions
  74 #define TI_MODE_CONFIGURING     0   // Device has not entered start device
  75 #define TI_MODE_BOOT            1   // Staying in boot mode
  76 #define TI_MODE_DOWNLOAD        2   // Made it to download mode
  77 #define TI_MODE_TRANSITIONING   3   // Currently in boot mode but transitioning to download mode
  78
  79 /* read urb state */
  80 #define EDGE_READ_URB_RUNNING   0
  81 #define EDGE_READ_URB_STOPPING  1
  82 #define EDGE_READ_URB_STOPPED   2
  83
  84 #define EDGE_LOW_LATENCY        1
  85 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
  86
  87 #define EDGE_OUT_BUF_SIZE       1024
  88
  89
  90 /* Product information read from the Edgeport */
  91 struct product_info
  92 {
  93         int     TiMode;                 // Current TI Mode
  94         __u8    hardware_type;          // Type of hardware
  95 } __attribute__((packed));
  96
  97 /* circular buffer */
  98 struct edge_buf {
  99         unsigned int    buf_size;
 100         char            *buf_buf;
 101         char            *buf_get;
 102         char            *buf_put;
 103 };
 104
 105 struct edgeport_port {
 106         __u16 uart_base;
 107         __u16 dma_address;
 108         __u8 shadow_msr;
 109         __u8 shadow_mcr;
 110         __u8 shadow_lsr;
 111         __u8 lsr_mask;
 112         __u32 ump_read_timeout;         /* Number of miliseconds the UMP will
 113                                            wait without data before completing
 114                                            a read short */
 115         int baud_rate;
 116         int close_pending;
 117         int lsr_event;
 118         struct edgeport_uart_buf_desc tx;
 119         struct async_icount     icount;
 120         wait_queue_head_t       delta_msr_wait; /* for handling sleeping while
 121                                                    waiting for msr change to
 122                                                    happen */
 123         struct edgeport_serial  *edge_serial;
 124         struct usb_serial_port  *port;
 125         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
 126         spinlock_t ep_lock;
 127         int ep_read_urb_state;
 128         int ep_write_urb_in_use;
 129         struct edge_buf *ep_out_buf;
 130 };
 131
 132 struct edgeport_serial {
 133         struct product_info product_info;
 134         u8 TI_I2C_Type;                 // Type of I2C in UMP
 135         u8 TiReadI2C;                   // Set to TRUE if we have read the I2c in Boot Mode
 136         struct mutex es_lock;
 137         int num_ports_open;
 138         struct usb_serial *serial;
 139 };
 140
 141
 142 /* Devices that this driver supports */
 143 static struct usb_device_id edgeport_1port_id_table [] = {
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 154         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 155         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 156         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 160         { }
 161 };
 162
 163 static struct usb_device_id edgeport_2port_id_table [] = {
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 176         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 177         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 178         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 179         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 182         { }
 183 };
 184
 185 /* Devices that this driver supports */
 186 static struct usb_device_id id_table_combined [] = {
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 209         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 210         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 211         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 212         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 213         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 214         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 215         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 216         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 217         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 218         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 219         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 220         { }
 221 };
 222
 223 MODULE_DEVICE_TABLE (usb, id_table_combined);
 224
 225 static struct usb_driver io_driver = {
 226         .name =         "io_ti",
 227         .probe =        usb_serial_probe,
 228         .disconnect =   usb_serial_disconnect,
 229         .id_table =     id_table_combined,
 230         .no_dynamic_id =        1,
 231 };
 232
 233
 234 static struct EDGE_FIRMWARE_VERSION_INFO OperationalCodeImageVersion;
 235
 236 static int debug;
 237
 238 static int TIStayInBootMode = 0;
 239 static int low_latency = EDGE_LOW_LATENCY;
 240 static int closing_wait = EDGE_CLOSING_WAIT;
 241 static int ignore_cpu_rev = 0;
 242 static int default_uart_mode = 0;       /* RS232 */
 243
 244
 245 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
 246
 247 static void stop_read(struct edgeport_port *edge_port);
 248 static int restart_read(struct edgeport_port *edge_port);
 249
 250 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios);
 251 static void edge_send(struct usb_serial_port *port);
 252
 253 /* sysfs attributes */
 254 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 255 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 256
 257 /* circular buffer */
 258 static struct edge_buf *edge_buf_alloc(unsigned int size);
 259 static void edge_buf_free(struct edge_buf *eb);
 260 static void edge_buf_clear(struct edge_buf *eb);
 261 static unsigned int edge_buf_data_avail(struct edge_buf *eb);
 262 static unsigned int edge_buf_space_avail(struct edge_buf *eb);
 263 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
 264         unsigned int count);
 265 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
 266         unsigned int count);
 267
 268
 269 static int TIReadVendorRequestSync (struct usb_device *dev,
 270                                 __u8            request,
 271                                 __u16           value,
 272                                 __u16           index,
 273                                 u8              *data,
 274                                 int             size)
 275 {
 276         int status;
 277
 278         status = usb_control_msg (dev,
 279                                 usb_rcvctrlpipe(dev, 0),
 280                                 request,
 281                                 (USB_TYPE_VENDOR |
 282                                  USB_RECIP_DEVICE |
 283                                  USB_DIR_IN),
 284                                 value,
 285                                 index,
 286                                 data,
 287                                 size,
 288                                 1000);
 289         if (status < 0)
 290                 return status;
 291         if (status != size) {
 292                 dbg ("%s - wanted to write %d, but only wrote %d",
 293                      __FUNCTION__, size, status);
 294                 return -ECOMM;
 295         }
 296         return 0;
 297 }
 298
 299 static int TISendVendorRequestSync (struct usb_device *dev,
 300                                 __u8            request,
 301                                 __u16           value,
 302                                 __u16           index,
 303                                 u8              *data,
 304                                 int             size)
 305 {
 306         int status;
 307
 308         status = usb_control_msg (dev,
 309                                 usb_sndctrlpipe(dev, 0),
 310                                 request,
 311                                 (USB_TYPE_VENDOR |
 312                                  USB_RECIP_DEVICE |
 313                                  USB_DIR_OUT),
 314                                 value,
 315                                 index,
 316                                 data,
 317                                 size,
 318                                 1000);
 319         if (status < 0)
 320                 return status;
 321         if (status != size) {
 322                 dbg ("%s - wanted to write %d, but only wrote %d",
 323                      __FUNCTION__, size, status);
 324                 return -ECOMM;
 325         }
 326         return 0;
 327 }
 328
 329 static int TIWriteCommandSync (struct usb_device *dev, __u8 command,
 330                                 __u8 moduleid, __u16 value, u8 *data,
 331                                 int size)
 332 {
 333         return TISendVendorRequestSync (dev,
 334                                           command,                      // Request
 335                                           value,                        // wValue
 336                                           moduleid,                     // wIndex
 337                                           data,                         // TransferBuffer
 338                                           size);                        // TransferBufferLength
 339
 340 }
 341
 342 /* clear tx/rx buffers and fifo in TI UMP */
 343 static int TIPurgeDataSync (struct usb_serial_port *port, __u16 mask)
 344 {
 345         int port_number = port->number - port->serial->minor;
 346
 347         dbg ("%s - port %d, mask %x", __FUNCTION__, port_number, mask);
 348
 349         return TIWriteCommandSync (port->serial->dev,
 350                                         UMPC_PURGE_PORT,
 351                                         (__u8)(UMPM_UART1_PORT + port_number),
 352                                         mask,
 353                                         NULL,
 354                                         0);
 355 }
 356
 357 /**
 358  * TIReadDownloadMemory - Read edgeport memory from TI chip
 359  * @dev: usb device pointer
 360  * @start_address: Device CPU address at which to read
 361  * @length: Length of above data
 362  * @address_type: Can read both XDATA and I2C
 363  * @buffer: pointer to input data buffer
 364  */
 365 static int TIReadDownloadMemory(struct usb_device *dev, int start_address,
 366                                 int length, __u8 address_type, __u8 *buffer)
 367 {
 368         int status = 0;
 369         __u8 read_length;
 370         __be16 be_start_address;
 371
 372         dbg ("%s - @ %x for %d", __FUNCTION__, start_address, length);
 373
 374         /* Read in blocks of 64 bytes
 375          * (TI firmware can't handle more than 64 byte reads)
 376          */
 377         while (length) {
 378                 if (length > 64)
 379                         read_length= 64;
 380                 else
 381                         read_length = (__u8)length;
 382
 383                 if (read_length > 1) {
 384                         dbg ("%s - @ %x for %d", __FUNCTION__,
 385                              start_address, read_length);
 386                 }
 387                 be_start_address = cpu_to_be16 (start_address);
 388                 status = TIReadVendorRequestSync (dev,
 389                                                   UMPC_MEMORY_READ,     // Request
 390                                                   (__u16)address_type,  // wValue (Address type)
 391                                                   (__force __u16)be_start_address,      // wIndex (Address to read)
 392                                                   buffer,               // TransferBuffer
 393                                                   read_length); // TransferBufferLength
 394
 395                 if (status) {
 396                         dbg ("%s - ERROR %x", __FUNCTION__, status);
 397                         return status;
 398                 }
 399
 400                 if (read_length > 1) {
 401                         usb_serial_debug_data(debug, &dev->dev, __FUNCTION__,
 402                                               read_length, buffer);
 403                 }
 404
 405                 /* Update pointers/length */
 406                 start_address += read_length;
 407                 buffer += read_length;
 408                 length -= read_length;
 409         }
 410
 411         return status;
 412 }
 413
 414 static int TIReadRam (struct usb_device *dev, int start_address, int length, __u8 *buffer)
 415 {
 416         return TIReadDownloadMemory (dev,
 417                                      start_address,
 418                                      length,
 419                                      DTK_ADDR_SPACE_XDATA,
 420                                      buffer);
 421 }
 422
 423 /* Read edgeport memory to a given block */
 424 static int TIReadBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 * buffer)
 425 {
 426         int status = 0;
 427         int i;
 428
 429         for (i=0; i< length; i++) {
 430                 status = TIReadVendorRequestSync (serial->serial->dev,
 431                                         UMPC_MEMORY_READ,               // Request
 432                                         serial->TI_I2C_Type,            // wValue (Address type)
 433                                         (__u16)(start_address+i),       // wIndex
 434                                         &buffer[i],                     // TransferBuffer
 435                                         0x01);                          // TransferBufferLength
 436                 if (status) {
 437                         dbg ("%s - ERROR %x", __FUNCTION__, status);
 438                         return status;
 439                 }
 440         }
 441
 442         dbg ("%s - start_address = %x, length = %d", __FUNCTION__, start_address, length);
 443         usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);
 444
 445         serial->TiReadI2C = 1;
 446
 447         return status;
 448 }
 449
 450 /* Write given block to TI EPROM memory */
 451 static int TIWriteBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
 452 {
 453         int status = 0;
 454         int i;
 455         __u8 temp;
 456
 457         /* Must do a read before write */
 458         if (!serial->TiReadI2C) {
 459                 status = TIReadBootMemory(serial, 0, 1, &temp);
 460                 if (status)
 461                         return status;
 462         }
 463
 464         for (i=0; i < length; ++i) {
 465                 status = TISendVendorRequestSync (serial->serial->dev,
 466                                                 UMPC_MEMORY_WRITE,              // Request
 467                                                 buffer[i],                      // wValue
 468                                                 (__u16)(i+start_address),       // wIndex
 469                                                 NULL,                           // TransferBuffer
 470                                                 0);                             // TransferBufferLength
 471                 if (status)
 472                         return status;
 473         }
 474
 475         dbg ("%s - start_sddr = %x, length = %d", __FUNCTION__, start_address, length);
 476         usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);
 477
 478         return status;
 479 }
 480
 481
 482 /* Write edgeport I2C memory to TI chip */
 483 static int TIWriteDownloadI2C (struct edgeport_serial *serial, int start_address, int length, __u8 address_type, __u8 *buffer)
 484 {
 485         int status = 0;
 486         int write_length;
 487         __be16 be_start_address;
 488
 489         /* We can only send a maximum of 1 aligned byte page at a time */
 490
 491         /* calulate the number of bytes left in the first page */
 492         write_length = EPROM_PAGE_SIZE - (start_address & (EPROM_PAGE_SIZE - 1));
 493
 494         if (write_length > length)
 495                 write_length = length;
 496
 497         dbg ("%s - BytesInFirstPage Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
 498         usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);
 499
 500         /* Write first page */
 501         be_start_address = cpu_to_be16 (start_address);
 502         status = TISendVendorRequestSync (serial->serial->dev,
 503                                         UMPC_MEMORY_WRITE,      // Request
 504                                         (__u16)address_type,    // wValue
 505                                         (__force __u16)be_start_address,        // wIndex
 506                                         buffer,                 // TransferBuffer
 507                                         write_length);
 508         if (status) {
 509                 dbg ("%s - ERROR %d", __FUNCTION__, status);
 510                 return status;
 511         }
 512
 513         length          -= write_length;
 514         start_address   += write_length;
 515         buffer          += write_length;
 516
 517         /* We should be aligned now -- can write max page size bytes at a time */
 518         while (length) {
 519                 if (length > EPROM_PAGE_SIZE)
 520                         write_length = EPROM_PAGE_SIZE;
 521                 else
 522                         write_length = length;
 523
 524                 dbg ("%s - Page Write Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
 525                 usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);
 526
 527                 /* Write next page */
 528                 be_start_address = cpu_to_be16 (start_address);
 529                 status = TISendVendorRequestSync (serial->serial->dev,
 530                                                 UMPC_MEMORY_WRITE,      // Request
 531                                                 (__u16)address_type,    // wValue
 532                                                 (__force __u16)be_start_address,        // wIndex
 533                                                 buffer,                 // TransferBuffer
 534                                                 write_length);          // TransferBufferLength
 535                 if (status) {
 536                         dev_err (&serial->serial->dev->dev, "%s - ERROR %d\n", __FUNCTION__, status);
 537                         return status;
 538                 }
 539
 540                 length          -= write_length;
 541                 start_address   += write_length;
 542                 buffer          += write_length;
 543         }
 544         return status;
 545 }
 546
 547 /* Examine the UMP DMA registers and LSR
 548  *
 549  * Check the MSBit of the X and Y DMA byte count registers.
 550  * A zero in this bit indicates that the TX DMA buffers are empty
 551  * then check the TX Empty bit in the UART.
 552  */
 553 static int TIIsTxActive (struct edgeport_port *port)
 554 {
 555         int status;
 556         struct out_endpoint_desc_block *oedb;
 557         __u8 *lsr;
 558         int bytes_left = 0;
 559
 560         oedb = kmalloc (sizeof (* oedb), GFP_KERNEL);
 561         if (!oedb) {
 562                 dev_err (&port->port->dev, "%s - out of memory\n", __FUNCTION__);
 563                 return -ENOMEM;
 564         }
 565
 566         lsr = kmalloc (1, GFP_KERNEL);  /* Sigh, that's right, just one byte,
 567                                            as not all platforms can do DMA
 568                                            from stack */
 569         if (!lsr) {
 570                 kfree(oedb);
 571                 return -ENOMEM;
 572         }
 573         /* Read the DMA Count Registers */
 574         status = TIReadRam (port->port->serial->dev,
 575                             port->dma_address,
 576                             sizeof( *oedb),
 577                             (void *)oedb);
 578
 579         if (status)
 580                 goto exit_is_tx_active;
 581
 582         dbg ("%s - XByteCount    0x%X", __FUNCTION__, oedb->XByteCount);
 583
 584         /* and the LSR */
 585         status = TIReadRam (port->port->serial->dev,
 586                             port->uart_base + UMPMEM_OFFS_UART_LSR,
 587                             1,
 588                             lsr);
 589
 590         if (status)
 591                 goto exit_is_tx_active;
 592         dbg ("%s - LSR = 0x%X", __FUNCTION__, *lsr);
 593
 594         /* If either buffer has data or we are transmitting then return TRUE */
 595         if ((oedb->XByteCount & 0x80 ) != 0 )
 596                 bytes_left += 64;
 597
 598         if ((*lsr & UMP_UART_LSR_TX_MASK ) == 0 )
 599                 bytes_left += 1;
 600
 601         /* We return Not Active if we get any kind of error */
 602 exit_is_tx_active:
 603         dbg ("%s - return %d", __FUNCTION__, bytes_left );
 604
 605         kfree(lsr);
 606         kfree(oedb);
 607         return bytes_left;
 608 }
 609
 610 static void TIChasePort(struct edgeport_port *port, unsigned long timeout, int flush)
 611 {
 612         int baud_rate;
 613         struct tty_struct *tty = port->port->tty;
 614         wait_queue_t wait;
 615         unsigned long flags;
 616
 617         if (!timeout)
 618                 timeout = (HZ*EDGE_CLOSING_WAIT)/100;
 619
 620         /* wait for data to drain from the buffer */
 621         spin_lock_irqsave(&port->ep_lock, flags);
 622         init_waitqueue_entry(&wait, current);
 623         add_wait_queue(&tty->write_wait, &wait);
 624         for (;;) {
 625                 set_current_state(TASK_INTERRUPTIBLE);
 626                 if (edge_buf_data_avail(port->ep_out_buf) == 0
 627                 || timeout == 0 || signal_pending(current)
 628                 || !usb_get_intfdata(port->port->serial->interface))  /* disconnect */
 629                         break;
 630                 spin_unlock_irqrestore(&port->ep_lock, flags);
 631                 timeout = schedule_timeout(timeout);
 632                 spin_lock_irqsave(&port->ep_lock, flags);
 633         }
 634         set_current_state(TASK_RUNNING);
 635         remove_wait_queue(&tty->write_wait, &wait);
 636         if (flush)
 637                 edge_buf_clear(port->ep_out_buf);
 638         spin_unlock_irqrestore(&port->ep_lock, flags);
 639
 640         /* wait for data to drain from the device */
 641         timeout += jiffies;
 642         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
 643         && usb_get_intfdata(port->port->serial->interface)) {  /* not disconnected */
 644                 if (!TIIsTxActive(port))
 645                         break;
 646                 msleep(10);
 647         }
 648
 649         /* disconnected */
 650         if (!usb_get_intfdata(port->port->serial->interface))
 651                 return;
 652
 653         /* wait one more character time, based on baud rate */
 654         /* (TIIsTxActive doesn't seem to wait for the last byte) */
 655         if ((baud_rate=port->baud_rate) == 0)
 656                 baud_rate = 50;
 657         msleep(max(1,(10000+baud_rate-1)/baud_rate));
 658 }
 659
 660 static int TIChooseConfiguration (struct usb_device *dev)
 661 {
 662         // There may be multiple configurations on this device, in which case
 663         // we would need to read and parse all of them to find out which one
 664         // we want. However, we just support one config at this point,
 665         // configuration # 1, which is Config Descriptor 0.
 666
 667         dbg ("%s - Number of Interfaces = %d", __FUNCTION__, dev->config->desc.bNumInterfaces);
 668         dbg ("%s - MAX Power            = %d", __FUNCTION__, dev->config->desc.bMaxPower*2);
 669
 670         if (dev->config->desc.bNumInterfaces != 1) {
 671                 dev_err (&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __FUNCTION__);
 672                 return -ENODEV;
 673         }
 674
 675         return 0;
 676 }
 677
 678 static int TIReadRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
 679 {
 680         int status;
 681
 682         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 683                 status = TIReadDownloadMemory (serial->serial->dev,
 684                                                start_address,
 685                                                length,
 686                                                serial->TI_I2C_Type,
 687                                                buffer);
 688         } else {
 689                 status = TIReadBootMemory (serial,
 690                                            start_address,
 691                                            length,
 692                                            buffer);
 693         }
 694
 695         return status;
 696 }
 697
 698 static int TIWriteRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
 699 {
 700         if (serial->product_info.TiMode == TI_MODE_BOOT)
 701                 return TIWriteBootMemory (serial,
 702                                           start_address,
 703                                           length,
 704                                           buffer);
 705
 706         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 707                 return TIWriteDownloadI2C (serial,
 708                                            start_address,
 709                                            length,
 710                                            serial->TI_I2C_Type,
 711                                            buffer);
 712
 713         return -EINVAL;
 714 }
 715
 716
 717
 718 /* Read a descriptor header from I2C based on type */
 719 static int TIGetDescriptorAddress (struct edgeport_serial *serial, int desc_type, struct ti_i2c_desc *rom_desc)
 720 {
 721         int start_address;
 722         int status;
 723
 724         /* Search for requested descriptor in I2C */
 725         start_address = 2;
 726         do {
 727                 status = TIReadRom (serial,
 728                                    start_address,
 729                                    sizeof(struct ti_i2c_desc),
 730                                    (__u8 *)rom_desc );
 731                 if (status)
 732                         return 0;
 733
 734                 if (rom_desc->Type == desc_type)
 735                         return start_address;
 736
 737                 start_address = start_address + sizeof(struct ti_i2c_desc) +  rom_desc->Size;
 738
 739         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 740
 741         return 0;
 742 }
 743
 744 /* Validate descriptor checksum */
 745 static int ValidChecksum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 746 {
 747         __u16 i;
 748         __u8 cs = 0;
 749
 750         for (i=0; i < rom_desc->Size; i++) {
 751                 cs = (__u8)(cs + buffer[i]);
 752         }
 753         if (cs != rom_desc->CheckSum) {
 754                 dbg ("%s - Mismatch %x - %x", __FUNCTION__, rom_desc->CheckSum, cs);
 755                 return -EINVAL;
 756         }
 757         return 0;
 758 }
 759
 760 /* Make sure that the I2C image is good */
 761 static int TiValidateI2cImage (struct edgeport_serial *serial)
 762 {
 763         struct device *dev = &serial->serial->dev->dev;
 764         int status = 0;
 765         struct ti_i2c_desc *rom_desc;
 766         int start_address = 2;
 767         __u8 *buffer;
 768         __u16 ttype;
 769
 770         rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
 771         if (!rom_desc) {
 772                 dev_err (dev, "%s - out of memory\n", __FUNCTION__);
 773                 return -ENOMEM;
 774         }
 775         buffer = kmalloc (TI_MAX_I2C_SIZE, GFP_KERNEL);
 776         if (!buffer) {
 777                 dev_err (dev, "%s - out of memory when allocating buffer\n", __FUNCTION__);
 778                 kfree (rom_desc);
 779                 return -ENOMEM;
 780         }
 781
 782         // Read the first byte (Signature0) must be 0x52 or 0x10
 783         status = TIReadRom (serial, 0, 1, buffer);
 784         if (status)
 785                 goto ExitTiValidateI2cImage;
 786
 787         if (*buffer != UMP5152 && *buffer != UMP3410) {
 788                 dev_err (dev, "%s - invalid buffer signature\n", __FUNCTION__);
 789                 status = -ENODEV;
 790                 goto ExitTiValidateI2cImage;
 791         }
 792
 793         do {
 794                 // Validate the I2C
 795                 status = TIReadRom (serial,
 796                                 start_address,
 797                                 sizeof(struct ti_i2c_desc),
 798                                 (__u8 *)rom_desc);
 799                 if (status)
 800                         break;
 801
 802                 if ((start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size) > TI_MAX_I2C_SIZE) {
 803                         status = -ENODEV;
 804                         dbg ("%s - structure too big, erroring out.", __FUNCTION__);
 805                         break;
 806                 }
 807
 808                 dbg ("%s Type = 0x%x", __FUNCTION__, rom_desc->Type);
 809
 810                 // Skip type 2 record
 811                 ttype = rom_desc->Type & 0x0f;
 812                 if ( ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 813                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO ) {
 814                         // Read the descriptor data
 815                         status = TIReadRom(serial,
 816                                                 start_address+sizeof(struct ti_i2c_desc),
 817                                                 rom_desc->Size,
 818                                                 buffer);
 819                         if (status)
 820                                 break;
 821
 822                         status = ValidChecksum(rom_desc, buffer);
 823                         if (status)
 824                                 break;
 825                 }
 826                 start_address = start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size;
 827
 828         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && (start_address < TI_MAX_I2C_SIZE));
 829
 830         if ((rom_desc->Type != I2C_DESC_TYPE_ION) || (start_address > TI_MAX_I2C_SIZE))
 831                 status = -ENODEV;
 832
 833 ExitTiValidateI2cImage:
 834         kfree (buffer);
 835         kfree (rom_desc);
 836         return status;
 837 }
 838
 839 static int TIReadManufDescriptor (struct edgeport_serial *serial, __u8 *buffer)
 840 {
 841         int status;
 842         int start_address;
 843         struct ti_i2c_desc *rom_desc;
 844         struct edge_ti_manuf_descriptor *desc;
 845
 846         rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
 847         if (!rom_desc) {
 848                 dev_err (&serial->serial->dev->dev, "%s - out of memory\n", __FUNCTION__);
 849                 return -ENOMEM;
 850         }
 851         start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_ION, rom_desc);
 852
 853         if (!start_address) {
 854                 dbg ("%s - Edge Descriptor not found in I2C", __FUNCTION__);
 855                 status = -ENODEV;
 856                 goto exit;
 857         }
 858
 859         // Read the descriptor data
 860         status = TIReadRom (serial,
 861                                 start_address+sizeof(struct ti_i2c_desc),
 862                                 rom_desc->Size,
 863                                 buffer);
 864         if (status)
 865                 goto exit;
 866
 867         status = ValidChecksum(rom_desc, buffer);
 868
 869         desc = (struct edge_ti_manuf_descriptor *)buffer;
 870         dbg ( "%s - IonConfig      0x%x", __FUNCTION__, desc->IonConfig         );
 871         dbg ( "%s - Version          %d", __FUNCTION__, desc->Version           );
 872         dbg ( "%s - Cpu/Board      0x%x", __FUNCTION__, desc->CpuRev_BoardRev   );
 873         dbg ( "%s - NumPorts         %d", __FUNCTION__, desc->NumPorts          );
 874         dbg ( "%s - NumVirtualPorts  %d", __FUNCTION__, desc->NumVirtualPorts   );
 875         dbg ( "%s - TotalPorts       %d", __FUNCTION__, desc->TotalPorts        );
 876
 877 exit:
 878         kfree (rom_desc);
 879         return status;
 880 }
 881
 882 /* Build firmware header used for firmware update */
 883 static int BuildI2CFirmwareHeader (__u8 *header, struct device *dev)
 884 {
 885         __u8 *buffer;
 886         int buffer_size;
 887         int i;
 888         __u8 cs = 0;
 889         struct ti_i2c_desc *i2c_header;
 890         struct ti_i2c_image_header *img_header;
 891         struct ti_i2c_firmware_rec *firmware_rec;
 892
 893         // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
 894         // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
 895         // will download the latest firmware (padded to 15.5k) into the UMP ram.
 896         // And finally when the device comes back up in download mode the driver will cause
 897         // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
 898         // the record type from 0xf2 to 0x02.
 899
 900         // Allocate a 15.5k buffer + 2 bytes for version number (Firmware Record)
 901         buffer_size = (((1024 * 16) - 512 )+ sizeof(struct ti_i2c_firmware_rec));
 902
 903         buffer = kmalloc (buffer_size, GFP_KERNEL);
 904         if (!buffer) {
 905                 dev_err (dev, "%s - out of memory\n", __FUNCTION__);
 906                 return -ENOMEM;
 907         }
 908
 909         // Set entire image of 0xffs
 910         memset (buffer, 0xff, buffer_size);
 911
 912         // Copy version number into firmware record
 913         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 914
 915         firmware_rec->Ver_Major = OperationalCodeImageVersion.MajorVersion;
 916         firmware_rec->Ver_Minor = OperationalCodeImageVersion.MinorVersion;
 917
 918         // Pointer to fw_down memory image
 919         img_header = (struct ti_i2c_image_header *)&PagableOperationalCodeImage[0];
 920
 921         memcpy (buffer + sizeof(struct ti_i2c_firmware_rec),
 922                 &PagableOperationalCodeImage[sizeof(struct ti_i2c_image_header)],
 923                 le16_to_cpu(img_header->Length));
 924
 925         for (i=0; i < buffer_size; i++) {
 926                 cs = (__u8)(cs + buffer[i]);
 927         }
 928
 929         kfree (buffer);
 930
 931         // Build new header
 932         i2c_header =  (struct ti_i2c_desc *)header;
 933         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 934
 935         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 936         i2c_header->Size        = (__u16)buffer_size;
 937         i2c_header->CheckSum    = cs;
 938         firmware_rec->Ver_Major = OperationalCodeImageVersion.MajorVersion;
 939         firmware_rec->Ver_Minor = OperationalCodeImageVersion.MinorVersion;
 940
 941         return 0;
 942 }
 943
 944 /* Try to figure out what type of I2c we have */
 945 static int TIGetI2cTypeInBootMode (struct edgeport_serial *serial)
 946 {
 947         int status;
 948         __u8 data;
 949
 950         // Try to read type 2
 951         status = TIReadVendorRequestSync (serial->serial->dev,
 952                                         UMPC_MEMORY_READ,               // Request
 953                                         DTK_ADDR_SPACE_I2C_TYPE_II,     // wValue (Address type)
 954                                         0,                              // wIndex
 955                                         &data,                          // TransferBuffer
 956                                         0x01);                          // TransferBufferLength
 957         if (status)
 958                 dbg ("%s - read 2 status error = %d", __FUNCTION__, status);
 959         else
 960                 dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
 961         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 962                 dbg ("%s - ROM_TYPE_II", __FUNCTION__);
 963                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 964                 return 0;
 965         }
 966
 967         // Try to read type 3
 968         status = TIReadVendorRequestSync (serial->serial->dev,
 969                                         UMPC_MEMORY_READ,               // Request
 970                                         DTK_ADDR_SPACE_I2C_TYPE_III,    // wValue (Address type)
 971                                         0,                              // wIndex
 972                                         &data,                          // TransferBuffer
 973                                         0x01);                          // TransferBufferLength
 974         if (status)
 975                 dbg ("%s - read 3 status error = %d", __FUNCTION__, status);
 976         else
 977                 dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
 978         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 979                 dbg ("%s - ROM_TYPE_III", __FUNCTION__);
 980                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 981                 return 0;
 982         }
 983
 984         dbg ("%s - Unknown", __FUNCTION__);
 985         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 986         return -ENODEV;
 987 }
 988
 989 static int TISendBulkTransferSync (struct usb_serial *serial, void *buffer, int length, int *num_sent)
 990 {
 991         int status;
 992
 993         status = usb_bulk_msg (serial->dev,
 994                                 usb_sndbulkpipe(serial->dev,
 995                                                 serial->port[0]->bulk_out_endpointAddress),
 996                                 buffer,
 997                                 length,
 998                                 num_sent,
 999                                 1000);
1000         return status;
1001 }
1002
1003 /* Download given firmware image to the device (IN BOOT MODE) */
1004 static int TIDownloadCodeImage (struct edgeport_serial *serial, __u8 *image, int image_length)
1005 {
1006         int status = 0;
1007         int pos;
1008         int transfer;
1009         int done;
1010
1011         // Transfer firmware image
1012         for (pos = 0; pos < image_length; ) {
1013                 // Read the next buffer from file
1014                 transfer = image_length - pos;
1015                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
1016                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
1017
1018                 // Transfer data
1019                 status = TISendBulkTransferSync (serial->serial, &image[pos], transfer, &done);
1020                 if (status)
1021                         break;
1022                 // Advance buffer pointer
1023                 pos += done;
1024         }
1025
1026         return status;
1027 }
1028
1029 // FIXME!!!
1030 static int TIConfigureBootDevice (struct usb_device *dev)
1031 {
1032         return 0;
1033 }
1034
1035 /**
1036  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1037  *
1038  * This routine downloads the main operating code into the TI5052, using the
1039  * boot code already burned into E2PROM or ROM.
1040  */
1041 static int TIDownloadFirmware (struct edgeport_serial *serial)
1042 {
1043         struct device *dev = &serial->serial->dev->dev;
1044         int status = 0;
1045         int start_address;
1046         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1047         struct usb_interface_descriptor *interface;
1048         int download_cur_ver;
1049         int download_new_ver;
1050
1051         /* This routine is entered by both the BOOT mode and the Download mode
1052          * We can determine which code is running by the reading the config
1053          * descriptor and if we have only one bulk pipe it is in boot mode
1054          */
1055         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1056
1057         /* Default to type 2 i2c */
1058         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1059
1060         status = TIChooseConfiguration (serial->serial->dev);
1061         if (status)
1062                 return status;
1063
1064         interface = &serial->serial->interface->cur_altsetting->desc;
1065         if (!interface) {
1066                 dev_err (dev, "%s - no interface set, error!\n", __FUNCTION__);
1067                 return -ENODEV;
1068         }
1069
1070         // Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1071         // if we have more than one endpoint we are definitely in download mode
1072         if (interface->bNumEndpoints > 1)
1073                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1074         else
1075                 // Otherwise we will remain in configuring mode
1076                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1077
1078         // Save Download Version Number
1079         OperationalCodeImageVersion.MajorVersion = PagableOperationalCodeImageVersion.MajorVersion;
1080         OperationalCodeImageVersion.MinorVersion = PagableOperationalCodeImageVersion.MinorVersion;
1081         OperationalCodeImageVersion.BuildNumber  = PagableOperationalCodeImageVersion.BuildNumber;
1082
1083         /********************************************************************/
1084         /* Download Mode */
1085         /********************************************************************/
1086         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1087                 struct ti_i2c_desc *rom_desc;
1088
1089                 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1090
1091                 status = TiValidateI2cImage (serial);
1092                 if (status) {
1093                         dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1094                         return status;
1095                 }
1096
1097                 /* Validate Hardware version number
1098                  * Read Manufacturing Descriptor from TI Based Edgeport
1099                  */
1100                 ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
1101                 if (!ti_manuf_desc) {
1102                         dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1103                         return -ENOMEM;
1104                 }
1105                 status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
1106                 if (status) {
1107                         kfree (ti_manuf_desc);
1108                         return status;
1109                 }
1110
1111                 // Check version number of ION descriptor
1112                 if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
1113                         dbg ( "%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__,
1114                              TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
1115                         kfree (ti_manuf_desc);
1116                         return -EINVAL;
1117                 }
1118
1119                 rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
1120                 if (!rom_desc) {
1121                         dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1122                         kfree (ti_manuf_desc);
1123                         return -ENOMEM;
1124                 }
1125
1126                 // Search for type 2 record (firmware record)
1127                 if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc)) != 0) {
1128                         struct ti_i2c_firmware_rec *firmware_version;
1129                         __u8 record;
1130
1131                         dbg ("%s - Found Type FIRMWARE (Type 2) record", __FUNCTION__);
1132
1133                         firmware_version = kmalloc (sizeof (*firmware_version), GFP_KERNEL);
1134                         if (!firmware_version) {
1135                                 dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1136                                 kfree (rom_desc);
1137                                 kfree (ti_manuf_desc);
1138                                 return -ENOMEM;
1139                         }
1140
1141                         // Validate version number
1142                         // Read the descriptor data
1143                         status = TIReadRom (serial,
1144                                         start_address+sizeof(struct ti_i2c_desc),
1145                                         sizeof(struct ti_i2c_firmware_rec),
1146                                         (__u8 *)firmware_version);
1147                         if (status) {
1148                                 kfree (firmware_version);
1149                                 kfree (rom_desc);
1150                                 kfree (ti_manuf_desc);
1151                                 return status;
1152                         }
1153
1154                         // Check version number of download with current version in I2c
1155                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1156                                            (firmware_version->Ver_Minor);
1157                         download_new_ver = (OperationalCodeImageVersion.MajorVersion << 8) +
1158                                            (OperationalCodeImageVersion.MinorVersion);
1159
1160                         dbg ("%s - >>>Firmware Versions Device %d.%d  Driver %d.%d",
1161                              __FUNCTION__,
1162                              firmware_version->Ver_Major,
1163                              firmware_version->Ver_Minor,
1164                              OperationalCodeImageVersion.MajorVersion,
1165                              OperationalCodeImageVersion.MinorVersion);
1166
1167                         // Check if we have an old version in the I2C and update if necessary
1168                         if (download_cur_ver != download_new_ver) {
1169                                 dbg ("%s - Update I2C Download from %d.%d to %d.%d",
1170                                      __FUNCTION__,
1171                                      firmware_version->Ver_Major,
1172                                      firmware_version->Ver_Minor,
1173                                      OperationalCodeImageVersion.MajorVersion,
1174                                      OperationalCodeImageVersion.MinorVersion);
1175
1176                                 // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
1177                                 // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
1178                                 // will download the latest firmware (padded to 15.5k) into the UMP ram.
1179                                 // And finally when the device comes back up in download mode the driver will cause
1180                                 // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
1181                                 // the record type from 0xf2 to 0x02.
1182
1183                                 record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1184
1185                                 // Change the I2C Firmware record type to 0xf2 to trigger an update
1186                                 status = TIWriteRom (serial,
1187                                                         start_address,
1188                                                         sizeof(record),
1189                                                         &record);
1190                                 if (status) {
1191                                         kfree (firmware_version);
1192                                         kfree (rom_desc);
1193                                         kfree (ti_manuf_desc);
1194                                         return status;
1195                                 }
1196
1197                                 // verify the write -- must do this in order for write to
1198                                 // complete before we do the hardware reset
1199                                 status = TIReadRom (serial,
1200                                                         start_address,
1201                                                         sizeof(record),
1202                                                         &record);
1203
1204                                 if (status) {
1205                                         kfree (firmware_version);
1206                                         kfree (rom_desc);
1207                                         kfree (ti_manuf_desc);
1208                                         return status;
1209                                 }
1210
1211                                 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1212                                         dev_err (dev, "%s - error resetting device\n", __FUNCTION__);
1213                                         kfree (firmware_version);
1214                                         kfree (rom_desc);
1215                                         kfree (ti_manuf_desc);
1216                                         return -ENODEV;
1217                                 }
1218
1219                                 dbg ("%s - HARDWARE RESET", __FUNCTION__);
1220
1221                                 // Reset UMP -- Back to BOOT MODE
1222                                 status = TISendVendorRequestSync (serial->serial->dev,
1223                                                                 UMPC_HARDWARE_RESET,    // Request
1224                                                                 0,                      // wValue
1225                                                                 0,                      // wIndex
1226                                                                 NULL,                   // TransferBuffer
1227                                                                 0);                     // TransferBufferLength
1228
1229                                 dbg ( "%s - HARDWARE RESET return %d", __FUNCTION__, status);
1230
1231                                 /* return an error on purpose. */
1232                                 kfree (firmware_version);
1233                                 kfree (rom_desc);
1234                                 kfree (ti_manuf_desc);
1235                                 return -ENODEV;
1236                         }
1237                         kfree (firmware_version);
1238                 }
1239                 // Search for type 0xF2 record (firmware blank record)
1240                 else if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1241                         #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + sizeof(struct ti_i2c_firmware_rec))
1242                         __u8 *header;
1243                         __u8 *vheader;
1244
1245                         header  = kmalloc (HEADER_SIZE, GFP_KERNEL);
1246                         if (!header) {
1247                                 dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1248                                 kfree (rom_desc);
1249                                 kfree (ti_manuf_desc);
1250                                 return -ENOMEM;
1251                         }
1252
1253                         vheader = kmalloc (HEADER_SIZE, GFP_KERNEL);
1254                         if (!vheader) {
1255                                 dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1256                                 kfree (header);
1257                                 kfree (rom_desc);
1258                                 kfree (ti_manuf_desc);
1259                                 return -ENOMEM;
1260                         }
1261
1262                         dbg ("%s - Found Type BLANK FIRMWARE (Type F2) record", __FUNCTION__);
1263
1264                         // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
1265                         // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
1266                         // will download the latest firmware (padded to 15.5k) into the UMP ram.
1267                         // And finally when the device comes back up in download mode the driver will cause
1268                         // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
1269                         // the record type from 0xf2 to 0x02.
1270                         status = BuildI2CFirmwareHeader(header, dev);
1271                         if (status) {
1272                                 kfree (vheader);
1273                                 kfree (header);
1274                                 kfree (rom_desc);
1275                                 kfree (ti_manuf_desc);
1276                                 return status;
1277                         }
1278
1279                         // Update I2C with type 0xf2 record with correct size and checksum
1280                         status = TIWriteRom (serial,
1281                                                 start_address,
1282                                                 HEADER_SIZE,
1283                                                 header);
1284                         if (status) {
1285                                 kfree (vheader);
1286                                 kfree (header);
1287                                 kfree (rom_desc);
1288                                 kfree (ti_manuf_desc);
1289                                 return status;
1290                         }
1291
1292                         // verify the write -- must do this in order for write to
1293                         // complete before we do the hardware reset
1294                         status = TIReadRom (serial,
1295                                                 start_address,
1296                                                 HEADER_SIZE,
1297                                                 vheader);
1298
1299                         if (status) {
1300                                 dbg ("%s - can't read header back", __FUNCTION__);
1301                                 kfree (vheader);
1302                                 kfree (header);
1303                                 kfree (rom_desc);
1304                                 kfree (ti_manuf_desc);
1305                                 return status;
1306                         }
1307                         if (memcmp(vheader, header, HEADER_SIZE)) {
1308                                 dbg ("%s - write download record failed", __FUNCTION__);
1309                                 kfree (vheader);
1310                                 kfree (header);
1311                                 kfree (rom_desc);
1312                                 kfree (ti_manuf_desc);
1313                                 return status;
1314                         }
1315
1316                         kfree (vheader);
1317                         kfree (header);
1318
1319                         dbg ("%s - Start firmware update", __FUNCTION__);
1320
1321                         // Tell firmware to copy download image into I2C
1322                         status = TISendVendorRequestSync (serial->serial->dev,
1323                                                 UMPC_COPY_DNLD_TO_I2C,  // Request
1324                                                 0,                      // wValue
1325                                                 0,                      // wIndex
1326                                                 NULL,                   // TransferBuffer
1327                                                 0);                     // TransferBufferLength
1328
1329                         dbg ("%s - Update complete 0x%x", __FUNCTION__, status);
1330                         if (status) {
1331                                 dev_err (dev, "%s - UMPC_COPY_DNLD_TO_I2C failed\n", __FUNCTION__);
1332                                 kfree (rom_desc);
1333                                 kfree (ti_manuf_desc);
1334                                 return status;
1335                         }
1336                 }
1337
1338                 // The device is running the download code
1339                 kfree (rom_desc);
1340                 kfree (ti_manuf_desc);
1341                 return 0;
1342         }
1343
1344         /********************************************************************/
1345         /* Boot Mode */
1346         /********************************************************************/
1347         dbg("%s - RUNNING IN BOOT MODE", __func__);
1348
1349         // Configure the TI device so we can use the BULK pipes for download
1350         status = TIConfigureBootDevice (serial->serial->dev);
1351         if (status)
1352                 return status;
1353
1354         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) != USB_VENDOR_ID_ION) {
1355                 dbg ("%s - VID = 0x%x", __FUNCTION__,
1356                      le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1357                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1358                 goto StayInBootMode;
1359         }
1360
1361         // We have an ION device (I2c Must be programmed)
1362         // Determine I2C image type
1363         if (TIGetI2cTypeInBootMode(serial)) {
1364                 goto StayInBootMode;
1365         }
1366
1367         // Registry variable set?
1368         if (TIStayInBootMode) {
1369                 dbg ("%s - TIStayInBootMode", __FUNCTION__);
1370                 goto StayInBootMode;
1371         }
1372
1373         // Check for ION Vendor ID and that the I2C is valid
1374         if (!TiValidateI2cImage(serial)) {
1375                 struct ti_i2c_image_header *header;
1376                 int i;
1377                 __u8 cs = 0;
1378                 __u8 *buffer;
1379                 int buffer_size;
1380
1381                 /* Validate Hardware version number
1382                  * Read Manufacturing Descriptor from TI Based Edgeport
1383                  */
1384                 ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
1385                 if (!ti_manuf_desc) {
1386                         dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1387                         return -ENOMEM;
1388                 }
1389                 status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
1390                 if (status) {
1391                         kfree (ti_manuf_desc);
1392                         goto StayInBootMode;
1393                 }
1394
1395                 // Check for version 2
1396                 if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
1397                         dbg ("%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__,
1398                              TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
1399                         kfree (ti_manuf_desc);
1400                         goto StayInBootMode;
1401                 }
1402
1403                 kfree (ti_manuf_desc);
1404
1405                 // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
1406                 // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
1407                 // will download the latest firmware (padded to 15.5k) into the UMP ram.
1408                 // And finally when the device comes back up in download mode the driver will cause
1409                 // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
1410                 // the record type from 0xf2 to 0x02.
1411
1412                 /*
1413                  * Do we really have to copy the whole firmware image,
1414                  * or could we do this in place!
1415                  */
1416
1417                 // Allocate a 15.5k buffer + 3 byte header
1418                 buffer_size = (((1024 * 16) - 512) + sizeof(struct ti_i2c_image_header));
1419                 buffer = kmalloc (buffer_size, GFP_KERNEL);
1420                 if (!buffer) {
1421                         dev_err (dev, "%s - out of memory\n", __FUNCTION__);
1422                         return -ENOMEM;
1423                 }
1424
1425                 // Initialize the buffer to 0xff (pad the buffer)
1426                 memset (buffer, 0xff, buffer_size);
1427
1428                 memcpy (buffer, &PagableOperationalCodeImage[0], PagableOperationalCodeSize);
1429
1430                 for(i = sizeof(struct ti_i2c_image_header); i < buffer_size; i++) {
1431                         cs = (__u8)(cs + buffer[i]);
1432                 }
1433
1434                 header = (struct ti_i2c_image_header *)buffer;
1435
1436                 // update length and checksum after padding
1437                 header->Length   = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_i2c_image_header)));
1438                 header->CheckSum = cs;
1439
1440                 // Download the operational code
1441                 dbg ("%s - Downloading operational code image (TI UMP)", __FUNCTION__);
1442                 status = TIDownloadCodeImage (serial, buffer, buffer_size);
1443
1444                 kfree (buffer);
1445
1446                 if (status) {
1447                         dbg ("%s - Error downloading operational code image", __FUNCTION__);
1448                         return status;
1449                 }
1450
1451                 // Device will reboot
1452                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1453
1454                 dbg ("%s - Download successful -- Device rebooting...", __FUNCTION__);
1455
1456                 /* return an error on purpose */
1457                 return -ENODEV;
1458         }
1459
1460 StayInBootMode:
1461         // Eprom is invalid or blank stay in boot mode
1462         dbg("%s - STAYING IN BOOT MODE", __func__);
1463         serial->product_info.TiMode = TI_MODE_BOOT;
1464
1465         return 0;
1466 }
1467
1468
1469 static int TISetDtr (struct edgeport_port *port)
1470 {
1471         int port_number = port->port->number - port->port->serial->minor;
1472
1473         dbg ("%s", __FUNCTION__);
1474         port->shadow_mcr |= MCR_DTR;
1475
1476         return TIWriteCommandSync (port->port->serial->dev,
1477                                 UMPC_SET_CLR_DTR,
1478                                 (__u8)(UMPM_UART1_PORT + port_number),
1479                                 1,      /* set */
1480                                 NULL,
1481                                 0);
1482 }
1483
1484 static int TIClearDtr (struct edgeport_port *port)
1485 {
1486         int port_number = port->port->number - port->port->serial->minor;
1487
1488         dbg ("%s", __FUNCTION__);
1489         port->shadow_mcr &= ~MCR_DTR;
1490
1491         return TIWriteCommandSync (port->port->serial->dev,
1492                                 UMPC_SET_CLR_DTR,
1493                                 (__u8)(UMPM_UART1_PORT + port_number),
1494                                 0,      /* clear */
1495                                 NULL,
1496                                 0);
1497 }
1498
1499 static int TISetRts (struct edgeport_port *port)
1500 {
1501         int port_number = port->port->number - port->port->serial->minor;
1502
1503         dbg ("%s", __FUNCTION__);
1504         port->shadow_mcr |= MCR_RTS;
1505
1506         return TIWriteCommandSync (port->port->serial->dev,
1507                                 UMPC_SET_CLR_RTS,
1508                                 (__u8)(UMPM_UART1_PORT + port_number),
1509                                 1,      /* set */
1510                                 NULL,
1511                                 0);
1512 }
1513
1514 static int TIClearRts (struct edgeport_port *port)
1515 {
1516         int port_number = port->port->number - port->port->serial->minor;
1517
1518         dbg ("%s", __FUNCTION__);
1519         port->shadow_mcr &= ~MCR_RTS;
1520
1521         return TIWriteCommandSync (port->port->serial->dev,
1522                                 UMPC_SET_CLR_RTS,
1523                                 (__u8)(UMPM_UART1_PORT + port_number),
1524                                 0,      /* clear */
1525                                 NULL,
1526                                 0);
1527 }
1528
1529 static int TISetLoopBack (struct edgeport_port *port)
1530 {
1531         int port_number = port->port->number - port->port->serial->minor;
1532
1533         dbg ("%s", __FUNCTION__);
1534
1535         return TIWriteCommandSync (port->port->serial->dev,
1536                                 UMPC_SET_CLR_LOOPBACK,
1537                                 (__u8)(UMPM_UART1_PORT + port_number),
1538                                 1,      /* set */
1539                                 NULL,
1540                                 0);
1541 }
1542
1543 static int TIClearLoopBack (struct edgeport_port *port)
1544 {
1545         int port_number = port->port->number - port->port->serial->minor;
1546
1547         dbg ("%s", __FUNCTION__);
1548
1549         return TIWriteCommandSync (port->port->serial->dev,
1550                                 UMPC_SET_CLR_LOOPBACK,
1551                                 (__u8)(UMPM_UART1_PORT + port_number),
1552                                 0,      /* clear */
1553                                 NULL,
1554                                 0);
1555 }
1556
1557 static int TISetBreak (struct edgeport_port *port)
1558 {
1559         int port_number = port->port->number - port->port->serial->minor;
1560
1561         dbg ("%s", __FUNCTION__);
1562
1563         return TIWriteCommandSync (port->port->serial->dev,
1564                                 UMPC_SET_CLR_BREAK,
1565                                 (__u8)(UMPM_UART1_PORT + port_number),
1566                                 1,      /* set */
1567                                 NULL,
1568                                 0);
1569 }
1570
1571 static int TIClearBreak (struct edgeport_port *port)
1572 {
1573         int port_number = port->port->number - port->port->serial->minor;
1574
1575         dbg ("%s", __FUNCTION__);
1576
1577         return TIWriteCommandSync (port->port->serial->dev,
1578                                 UMPC_SET_CLR_BREAK,
1579                                 (__u8)(UMPM_UART1_PORT + port_number),
1580                                 0,      /* clear */
1581                                 NULL,
1582                                 0);
1583 }
1584
1585 static int TIRestoreMCR (struct edgeport_port *port, __u8 mcr)
1586 {
1587         int status = 0;
1588
1589         dbg ("%s - %x", __FUNCTION__, mcr);
1590
1591         if (mcr & MCR_DTR)
1592                 status = TISetDtr (port);
1593         else
1594                 status = TIClearDtr (port);
1595
1596         if (status)
1597                 return status;
1598
1599         if (mcr & MCR_RTS)
1600                 status = TISetRts (port);
1601         else
1602                 status = TIClearRts (port);
1603
1604         if (status)
1605                 return status;
1606
1607         if (mcr & MCR_LOOPBACK)
1608                 status = TISetLoopBack (port);
1609         else
1610                 status = TIClearLoopBack (port);
1611
1612         return status;
1613 }
1614
1615
1616
1617 /* Convert TI LSR to standard UART flags */
1618 static __u8 MapLineStatus (__u8 ti_lsr)
1619 {
1620         __u8 lsr = 0;
1621
1622 #define MAP_FLAG(flagUmp, flagUart)    \
1623         if (ti_lsr & flagUmp) \
1624                 lsr |= flagUart;
1625
1626         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1627         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1628         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1629         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1630         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* receive data available */
1631         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* transmit holding register empty */
1632
1633 #undef MAP_FLAG
1634
1635         return lsr;
1636 }
1637
1638 static void handle_new_msr (struct edgeport_port *edge_port, __u8 msr)
1639 {
1640         struct async_icount *icount;
1641         struct tty_struct *tty;
1642
1643         dbg ("%s - %02x", __FUNCTION__, msr);
1644
1645         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1646                 icount = &edge_port->icount;
1647
1648                 /* update input line counters */
1649                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1650                         icount->cts++;
1651                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1652                         icount->dsr++;
1653                 if (msr & EDGEPORT_MSR_DELTA_CD)
1654                         icount->dcd++;
1655                 if (msr & EDGEPORT_MSR_DELTA_RI)
1656                         icount->rng++;
1657                 wake_up_interruptible (&edge_port->delta_msr_wait);
1658         }
1659
1660         /* Save the new modem status */
1661         edge_port->shadow_msr = msr & 0xf0;
1662
1663         tty = edge_port->port->tty;
1664         /* handle CTS flow control */
1665         if (tty && C_CRTSCTS(tty)) {
1666                 if (msr & EDGEPORT_MSR_CTS) {
1667                         tty->hw_stopped = 0;
1668                         tty_wakeup(tty);
1669                 } else {
1670                         tty->hw_stopped = 1;
1671                 }
1672         }
1673
1674         return;
1675 }
1676
1677 static void handle_new_lsr (struct edgeport_port *edge_port, int lsr_data, __u8 lsr, __u8 data)
1678 {
1679         struct async_icount *icount;
1680         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1681
1682         dbg ("%s - %02x", __FUNCTION__, new_lsr);
1683
1684         edge_port->shadow_lsr = lsr;
1685
1686         if (new_lsr & LSR_BREAK) {
1687                 /*
1688                  * Parity and Framing errors only count if they
1689                  * occur exclusive of a break being received.
1690                  */
1691                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1692         }
1693
1694         /* Place LSR data byte into Rx buffer */
1695         if (lsr_data && edge_port->port->tty)
1696                 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
1697
1698         /* update input line counters */
1699         icount = &edge_port->icount;
1700         if (new_lsr & LSR_BREAK)
1701                 icount->brk++;
1702         if (new_lsr & LSR_OVER_ERR)
1703                 icount->overrun++;
1704         if (new_lsr & LSR_PAR_ERR)
1705                 icount->parity++;
1706         if (new_lsr & LSR_FRM_ERR)
1707                 icount->frame++;
1708 }
1709
1710
1711 static void edge_interrupt_callback (struct urb *urb)
1712 {
1713         struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
1714         struct usb_serial_port *port;
1715         struct edgeport_port *edge_port;
1716         unsigned char *data = urb->transfer_buffer;
1717         int length = urb->actual_length;
1718         int port_number;
1719         int function;
1720         int retval;
1721         __u8 lsr;
1722         __u8 msr;
1723         int status = urb->status;
1724
1725         dbg("%s", __FUNCTION__);
1726
1727         switch (status) {
1728         case 0:
1729                 /* success */
1730                 break;
1731         case -ECONNRESET:
1732         case -ENOENT:
1733         case -ESHUTDOWN:
1734                 /* this urb is terminated, clean up */
1735                 dbg("%s - urb shutting down with status: %d",
1736                     __FUNCTION__, status);
1737                 return;
1738         default:
1739                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1740                         "%d\n", __FUNCTION__, status);
1741                 goto exit;
1742         }
1743
1744         if (!length) {
1745                 dbg ("%s - no data in urb", __FUNCTION__);
1746                 goto exit;
1747         }
1748
1749         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
1750
1751         if (length != 2) {
1752                 dbg ("%s - expecting packet of size 2, got %d", __FUNCTION__, length);
1753                 goto exit;
1754         }
1755
1756         port_number = TIUMP_GET_PORT_FROM_CODE (data[0]);
1757         function    = TIUMP_GET_FUNC_FROM_CODE (data[0]);
1758         dbg ("%s - port_number %d, function %d, info 0x%x",
1759              __FUNCTION__, port_number, function, data[1]);
1760         port = edge_serial->serial->port[port_number];
1761         edge_port = usb_get_serial_port_data(port);
1762         if (!edge_port) {
1763                 dbg ("%s - edge_port not found", __FUNCTION__);
1764                 return;
1765         }
1766         switch (function) {
1767         case TIUMP_INTERRUPT_CODE_LSR:
1768                 lsr = MapLineStatus(data[1]);
1769                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1770                         /* Save the LSR event for bulk read completion routine */
1771                         dbg ("%s - LSR Event Port %u LSR Status = %02x",
1772                              __FUNCTION__, port_number, lsr);
1773                         edge_port->lsr_event = 1;
1774                         edge_port->lsr_mask = lsr;
1775                 } else {
1776                         dbg ("%s - ===== Port %d LSR Status = %02x ======",
1777                              __FUNCTION__, port_number, lsr);
1778                         handle_new_lsr (edge_port, 0, lsr, 0);
1779                 }
1780                 break;
1781
1782         case TIUMP_INTERRUPT_CODE_MSR:  // MSR
1783                 /* Copy MSR from UMP */
1784                 msr = data[1];
1785                 dbg ("%s - ===== Port %u MSR Status = %02x ======\n",
1786                      __FUNCTION__, port_number, msr);
1787                 handle_new_msr (edge_port, msr);
1788                 break;
1789
1790         default:
1791                 dev_err (&urb->dev->dev, "%s - Unknown Interrupt code from UMP %x\n",
1792                          __FUNCTION__, data[1]);
1793                 break;
1794
1795         }
1796
1797 exit:
1798         retval = usb_submit_urb (urb, GFP_ATOMIC);
1799         if (retval)
1800                 dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
1801                          __FUNCTION__, retval);
1802 }
1803
1804 static void edge_bulk_in_callback (struct urb *urb)
1805 {
1806         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
1807         unsigned char *data = urb->transfer_buffer;
1808         struct tty_struct *tty;
1809         int retval = 0;
1810         int port_number;
1811         int status = urb->status;
1812
1813         dbg("%s", __FUNCTION__);
1814
1815         switch (status) {
1816         case 0:
1817                 /* success */
1818                 break;
1819         case -ECONNRESET:
1820         case -ENOENT:
1821         case -ESHUTDOWN:
1822                 /* this urb is terminated, clean up */
1823                 dbg("%s - urb shutting down with status: %d",
1824                     __FUNCTION__, status);
1825                 return;
1826         default:
1827                 dev_err (&urb->dev->dev,"%s - nonzero read bulk status received: %d\n",
1828                      __FUNCTION__, status);
1829         }
1830
1831         if (status == -EPIPE)
1832                 goto exit;
1833
1834         if (status) {
1835                 dev_err(&urb->dev->dev,"%s - stopping read!\n", __FUNCTION__);
1836                 return;
1837         }
1838
1839         port_number = edge_port->port->number - edge_port->port->serial->minor;
1840
1841         if (edge_port->lsr_event) {
1842                 edge_port->lsr_event = 0;
1843                 dbg ("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1844                      __FUNCTION__, port_number, edge_port->lsr_mask, *data);
1845                 handle_new_lsr (edge_port, 1, edge_port->lsr_mask, *data);
1846                 /* Adjust buffer length/pointer */
1847                 --urb->actual_length;
1848                 ++data;
1849         }
1850
1851         tty = edge_port->port->tty;
1852         if (tty && urb->actual_length) {
1853                 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, urb->actual_length, data);
1854
1855                 if (edge_port->close_pending) {
1856                         dbg ("%s - close is pending, dropping data on the floor.", __FUNCTION__);
1857                 } else {
1858                         edge_tty_recv(&edge_port->port->dev, tty, data, urb->actual_length);
1859                 }
1860                 edge_port->icount.rx += urb->actual_length;
1861         }
1862
1863 exit:
1864         /* continue read unless stopped */
1865         spin_lock(&edge_port->ep_lock);
1866         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1867                 urb->dev = edge_port->port->serial->dev;
1868                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1869         } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1870                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1871         }
1872         spin_unlock(&edge_port->ep_lock);
1873         if (retval)
1874                 dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
1875                          __FUNCTION__, retval);
1876 }
1877
1878 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
1879 {
1880         int cnt;
1881
1882         do {
1883                 cnt = tty_buffer_request_room(tty, length);
1884                 if (cnt < length) {
1885                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1886                                 __FUNCTION__, length - cnt);
1887                         if(cnt == 0)
1888                                 break;
1889                 }
1890                 tty_insert_flip_string(tty, data, cnt);
1891                 data += cnt;
1892                 length -= cnt;
1893         } while (length > 0);
1894
1895         tty_flip_buffer_push(tty);
1896 }
1897
1898 static void edge_bulk_out_callback (struct urb *urb)
1899 {
1900         struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1901         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1902         int status = urb->status;
1903
1904         dbg ("%s - port %d", __FUNCTION__, port->number);
1905
1906         edge_port->ep_write_urb_in_use = 0;
1907
1908         switch (status) {
1909         case 0:
1910                 /* success */
1911                 break;
1912         case -ECONNRESET:
1913         case -ENOENT:
1914         case -ESHUTDOWN:
1915                 /* this urb is terminated, clean up */
1916                 dbg("%s - urb shutting down with status: %d",
1917                     __FUNCTION__, status);
1918                 return;
1919         default:
1920                 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1921                         "received: %d\n", __FUNCTION__, status);
1922         }
1923
1924         /* send any buffered data */
1925         edge_send(port);
1926 }
1927
1928 static int edge_open (struct usb_serial_port *port, struct file * filp)
1929 {
1930         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1931         struct edgeport_serial *edge_serial;
1932         struct usb_device *dev;
1933         struct urb *urb;
1934         int port_number;
1935         int status;
1936         u16 open_settings;
1937         u8 transaction_timeout;
1938
1939         dbg("%s - port %d", __FUNCTION__, port->number);
1940
1941         if (edge_port == NULL)
1942                 return -ENODEV;
1943
1944         if (port->tty)
1945                 port->tty->low_latency = low_latency;
1946
1947         port_number = port->number - port->serial->minor;
1948         switch (port_number) {
1949                 case 0:
1950                         edge_port->uart_base = UMPMEM_BASE_UART1;
1951                         edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1952                         break;
1953                 case 1:
1954                         edge_port->uart_base = UMPMEM_BASE_UART2;
1955                         edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1956                         break;
1957                 default:
1958                         dev_err (&port->dev, "Unknown port number!!!\n");
1959                         return -ENODEV;
1960         }
1961
1962         dbg ("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1963              __FUNCTION__, port_number, edge_port->uart_base, edge_port->dma_address);
1964
1965         dev = port->serial->dev;
1966
1967         memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1968         init_waitqueue_head (&edge_port->delta_msr_wait);
1969
1970         /* turn off loopback */
1971         status = TIClearLoopBack (edge_port);
1972         if (status) {
1973                 dev_err(&port->dev,"%s - cannot send clear loopback command, %d\n",
1974                         __FUNCTION__, status);
1975                 return status;
1976         }
1977
1978         /* set up the port settings */
1979         edge_set_termios (port, port->tty->termios);
1980
1981         /* open up the port */
1982
1983         /* milliseconds to timeout for DMA transfer */
1984         transaction_timeout = 2;
1985
1986         edge_port->ump_read_timeout = max (20, ((transaction_timeout * 3) / 2) );
1987
1988         // milliseconds to timeout for DMA transfer
1989         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1990                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1991                              (transaction_timeout << 2));
1992
1993         dbg ("%s - Sending UMPC_OPEN_PORT", __FUNCTION__);
1994
1995         /* Tell TI to open and start the port */
1996         status = TIWriteCommandSync (dev,
1997                                         UMPC_OPEN_PORT,
1998                                         (u8)(UMPM_UART1_PORT + port_number),
1999                                         open_settings,
2000                                         NULL,
2001                                         0);
2002         if (status) {
2003                 dev_err(&port->dev,"%s - cannot send open command, %d\n", __FUNCTION__, status);
2004                 return status;
2005         }
2006
2007         /* Start the DMA? */
2008         status = TIWriteCommandSync (dev,
2009                                         UMPC_START_PORT,
2010                                         (u8)(UMPM_UART1_PORT + port_number),
2011                                         0,
2012                                         NULL,
2013                                         0);
2014         if (status) {
2015                 dev_err(&port->dev,"%s - cannot send start DMA command, %d\n", __FUNCTION__, status);
2016                 return status;
2017         }
2018
2019         /* Clear TX and RX buffers in UMP */
2020         status = TIPurgeDataSync (port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
2021         if (status) {
2022                 dev_err(&port->dev,"%s - cannot send clear buffers command, %d\n", __FUNCTION__, status);
2023                 return status;
2024         }
2025
2026         /* Read Initial MSR */
2027         status = TIReadVendorRequestSync (dev,
2028                                         UMPC_READ_MSR,  // Request
2029                                         0,              // wValue
2030                                         (__u16)(UMPM_UART1_PORT + port_number), // wIndex (Address)
2031                                         &edge_port->shadow_msr,                 // TransferBuffer
2032                                         1);                                     // TransferBufferLength
2033         if (status) {
2034                 dev_err(&port->dev,"%s - cannot send read MSR command, %d\n", __FUNCTION__, status);
2035                 return status;
2036         }
2037
2038         dbg ("ShadowMSR 0x%X", edge_port->shadow_msr);
2039
2040         /* Set Initial MCR */
2041         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
2042         dbg ("ShadowMCR 0x%X", edge_port->shadow_mcr);
2043
2044         edge_serial = edge_port->edge_serial;
2045         if (mutex_lock_interruptible(&edge_serial->es_lock))
2046                 return -ERESTARTSYS;
2047         if (edge_serial->num_ports_open == 0) {
2048                 /* we are the first port to be opened, let's post the interrupt urb */
2049                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
2050                 if (!urb) {
2051                         dev_err (&port->dev, "%s - no interrupt urb present, exiting\n", __FUNCTION__);
2052                         status = -EINVAL;
2053                         goto release_es_lock;
2054                 }
2055                 urb->complete = edge_interrupt_callback;
2056                 urb->context = edge_serial;
2057                 urb->dev = dev;
2058                 status = usb_submit_urb (urb, GFP_KERNEL);
2059                 if (status) {
2060                         dev_err (&port->dev, "%s - usb_submit_urb failed with value %d\n", __FUNCTION__, status);
2061                         goto release_es_lock;
2062                 }
2063         }
2064
2065         /*
2066          * reset the data toggle on the bulk endpoints to work around bug in
2067          * host controllers where things get out of sync some times
2068          */
2069         usb_clear_halt (dev, port->write_urb->pipe);
2070         usb_clear_halt (dev, port->read_urb->pipe);
2071
2072         /* start up our bulk read urb */
2073         urb = port->read_urb;
2074         if (!urb) {
2075                 dev_err (&port->dev, "%s - no read urb present, exiting\n", __FUNCTION__);
2076                 status = -EINVAL;
2077                 goto unlink_int_urb;
2078         }
2079         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2080         urb->complete = edge_bulk_in_callback;
2081         urb->context = edge_port;
2082         urb->dev = dev;
2083         status = usb_submit_urb (urb, GFP_KERNEL);
2084         if (status) {
2085                 dev_err (&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
2086                 goto unlink_int_urb;
2087         }
2088
2089         ++edge_serial->num_ports_open;
2090
2091         dbg("%s - exited", __FUNCTION__);
2092
2093         goto release_es_lock;
2094
2095 unlink_int_urb:
2096         if (edge_port->edge_serial->num_ports_open == 0)
2097                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2098 release_es_lock:
2099         mutex_unlock(&edge_serial->es_lock);
2100         return status;
2101 }
2102
2103 static void edge_close (struct usb_serial_port *port, struct file *filp)
2104 {
2105         struct edgeport_serial *edge_serial;
2106         struct edgeport_port *edge_port;
2107         int port_number;
2108         int status;
2109
2110         dbg("%s - port %d", __FUNCTION__, port->number);
2111
2112         edge_serial = usb_get_serial_data(port->serial);
2113         edge_port = usb_get_serial_port_data(port);
2114         if ((edge_serial == NULL) || (edge_port == NULL))
2115                 return;
2116
2117         /* The bulkreadcompletion routine will check
2118          * this flag and dump add read data */
2119         edge_port->close_pending = 1;
2120
2121         /* chase the port close and flush */
2122         TIChasePort (edge_port, (HZ*closing_wait)/100, 1);
2123
2124         usb_kill_urb(port->read_urb);
2125         usb_kill_urb(port->write_urb);
2126         edge_port->ep_write_urb_in_use = 0;
2127
2128         /* assuming we can still talk to the device,
2129          * send a close port command to it */
2130         dbg("%s - send umpc_close_port", __FUNCTION__);
2131         port_number = port->number - port->serial->minor;
2132         status = TIWriteCommandSync (port->serial->dev,
2133                                      UMPC_CLOSE_PORT,
2134                                      (__u8)(UMPM_UART1_PORT + port_number),
2135                                      0,
2136                                      NULL,
2137                                      0);
2138         mutex_lock(&edge_serial->es_lock);
2139         --edge_port->edge_serial->num_ports_open;
2140         if (edge_port->edge_serial->num_ports_open <= 0) {
2141                 /* last port is now closed, let's shut down our interrupt urb */
2142                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2143                 edge_port->edge_serial->num_ports_open = 0;
2144         }
2145         mutex_unlock(&edge_serial->es_lock);
2146         edge_port->close_pending = 0;
2147
2148         dbg("%s - exited", __FUNCTION__);
2149 }
2150
2151 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
2152 {
2153         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2154         unsigned long flags;
2155
2156         dbg("%s - port %d", __FUNCTION__, port->number);
2157
2158         if (count == 0) {
2159                 dbg("%s - write request of 0 bytes", __FUNCTION__);
2160                 return 0;
2161         }
2162
2163         if (edge_port == NULL)
2164                 return -ENODEV;
2165         if (edge_port->close_pending == 1)
2166                 return -ENODEV;
2167
2168         spin_lock_irqsave(&edge_port->ep_lock, flags);
2169         count = edge_buf_put(edge_port->ep_out_buf, data, count);
2170         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2171
2172         edge_send(port);
2173
2174         return count;
2175 }
2176
2177 static void edge_send(struct usb_serial_port *port)
2178 {
2179         int count, result;
2180         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2181         struct tty_struct *tty = port->tty;
2182         unsigned long flags;
2183
2184
2185         dbg("%s - port %d", __FUNCTION__, port->number);
2186
2187         spin_lock_irqsave(&edge_port->ep_lock, flags);
2188
2189         if (edge_port->ep_write_urb_in_use) {
2190                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2191                 return;
2192         }
2193
2194         count = edge_buf_get(edge_port->ep_out_buf,
2195                                 port->write_urb->transfer_buffer,
2196                                 port->bulk_out_size);
2197
2198         if (count == 0) {
2199                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2200                 return;
2201         }
2202
2203         edge_port->ep_write_urb_in_use = 1;
2204
2205         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2206
2207         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
2208
2209         /* set up our urb */
2210         usb_fill_bulk_urb (port->write_urb, port->serial->dev,
2211                            usb_sndbulkpipe (port->serial->dev,
2212                                             port->bulk_out_endpointAddress),
2213                            port->write_urb->transfer_buffer, count,
2214                            edge_bulk_out_callback,
2215                            port);
2216
2217         /* send the data out the bulk port */
2218         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2219         if (result) {
2220                 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
2221                 edge_port->ep_write_urb_in_use = 0;
2222                 // TODO: reschedule edge_send
2223         } else {
2224                 edge_port->icount.tx += count;
2225         }
2226
2227         /* wakeup any process waiting for writes to complete */
2228         /* there is now more room in the buffer for new writes */
2229         if (tty) {
2230                 /* let the tty driver wakeup if it has a special write_wakeup function */
2231                 tty_wakeup(tty);
2232         }
2233 }
2234
2235 static int edge_write_room (struct usb_serial_port *port)
2236 {
2237         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2238         int room = 0;
2239         unsigned long flags;
2240
2241         dbg("%s - port %d", __FUNCTION__, port->number);
2242
2243         if (edge_port == NULL)
2244                 return -ENODEV;
2245         if (edge_port->close_pending == 1)
2246                 return -ENODEV;
2247
2248         spin_lock_irqsave(&edge_port->ep_lock, flags);
2249         room = edge_buf_space_avail(edge_port->ep_out_buf);
2250         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2251
2252         dbg("%s - returns %d", __FUNCTION__, room);
2253         return room;
2254 }
2255
2256 static int edge_chars_in_buffer (struct usb_serial_port *port)
2257 {
2258         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2259         int chars = 0;
2260         unsigned long flags;
2261
2262         dbg("%s - port %d", __FUNCTION__, port->number);
2263
2264         if (edge_port == NULL)
2265                 return -ENODEV;
2266         if (edge_port->close_pending == 1)
2267                 return -ENODEV;
2268
2269         spin_lock_irqsave(&edge_port->ep_lock, flags);
2270         chars = edge_buf_data_avail(edge_port->ep_out_buf);
2271         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2272
2273         dbg ("%s - returns %d", __FUNCTION__, chars);
2274         return chars;
2275 }
2276
2277 static void edge_throttle (struct usb_serial_port *port)
2278 {
2279         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2280         struct tty_struct *tty;
2281         int status;
2282
2283         dbg("%s - port %d", __FUNCTION__, port->number);
2284
2285         if (edge_port == NULL)
2286                 return;
2287
2288         tty = port->tty;
2289         if (!tty) {
2290                 dbg ("%s - no tty available", __FUNCTION__);
2291                 return;
2292         }
2293
2294         /* if we are implementing XON/XOFF, send the stop character */
2295         if (I_IXOFF(tty)) {
2296                 unsigned char stop_char = STOP_CHAR(tty);
2297                 status = edge_write (port, &stop_char, 1);
2298                 if (status <= 0) {
2299                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __FUNCTION__, status);
2300                 }
2301         }
2302
2303         /* if we are implementing RTS/CTS, stop reads */
2304         /* and the Edgeport will clear the RTS line */
2305         if (C_CRTSCTS(tty))
2306                 stop_read(edge_port);
2307
2308 }
2309
2310 static void edge_unthrottle (struct usb_serial_port *port)
2311 {
2312         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2313         struct tty_struct *tty;
2314         int status;
2315
2316         dbg("%s - port %d", __FUNCTION__, port->number);
2317
2318         if (edge_port == NULL)
2319                 return;
2320
2321         tty = port->tty;
2322         if (!tty) {
2323                 dbg ("%s - no tty available", __FUNCTION__);
2324                 return;
2325         }
2326
2327         /* if we are implementing XON/XOFF, send the start character */
2328         if (I_IXOFF(tty)) {
2329                 unsigned char start_char = START_CHAR(tty);
2330                 status = edge_write (port, &start_char, 1);
2331                 if (status <= 0) {
2332                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __FUNCTION__, status);
2333                 }
2334         }
2335
2336         /* if we are implementing RTS/CTS, restart reads */
2337         /* are the Edgeport will assert the RTS line */
2338         if (C_CRTSCTS(tty)) {
2339                 status = restart_read(edge_port);
2340                 if (status)
2341                         dev_err(&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
2342         }
2343
2344 }
2345
2346 static void stop_read(struct edgeport_port *edge_port)
2347 {
2348         unsigned long flags;
2349
2350         spin_lock_irqsave(&edge_port->ep_lock, flags);
2351
2352         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2353                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2354         edge_port->shadow_mcr &= ~MCR_RTS;
2355
2356         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2357 }
2358
2359 static int restart_read(struct edgeport_port *edge_port)
2360 {
2361         struct urb *urb;
2362         int status = 0;
2363         unsigned long flags;
2364
2365         spin_lock_irqsave(&edge_port->ep_lock, flags);
2366
2367         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2368                 urb = edge_port->port->read_urb;
2369                 urb->complete = edge_bulk_in_callback;
2370                 urb->context = edge_port;
2371                 urb->dev = edge_port->port->serial->dev;
2372                 status = usb_submit_urb(urb, GFP_ATOMIC);
2373         }
2374         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2375         edge_port->shadow_mcr |= MCR_RTS;
2376
2377         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2378
2379         return status;
2380 }
2381
2382 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
2383 {
2384         struct ump_uart_config *config;
2385         struct tty_struct *tty;
2386         int baud;
2387         unsigned cflag;
2388         int status;
2389         int port_number = edge_port->port->number - edge_port->port->serial->minor;
2390
2391         dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2392
2393         tty = edge_port->port->tty;
2394
2395         config = kmalloc (sizeof (*config), GFP_KERNEL);
2396         if (!config) {
2397                 dev_err (&edge_port->port->dev, "%s - out of memory\n", __FUNCTION__);
2398                 return;
2399         }
2400
2401         cflag = tty->termios->c_cflag;
2402
2403         config->wFlags = 0;
2404
2405         /* These flags must be set */
2406         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2407         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2408         config->bUartMode = (__u8)(edge_port->bUartMode);
2409
2410         switch (cflag & CSIZE) {
2411                 case CS5:
2412                             config->bDataBits = UMP_UART_CHAR5BITS;
2413                             dbg ("%s - data bits = 5", __FUNCTION__);
2414                             break;
2415                 case CS6:
2416                             config->bDataBits = UMP_UART_CHAR6BITS;
2417                             dbg ("%s - data bits = 6", __FUNCTION__);
2418                             break;
2419                 case CS7:
2420                             config->bDataBits = UMP_UART_CHAR7BITS;
2421                             dbg ("%s - data bits = 7", __FUNCTION__);
2422                             break;
2423                 default:
2424                 case CS8:
2425                             config->bDataBits = UMP_UART_CHAR8BITS;
2426                             dbg ("%s - data bits = 8", __FUNCTION__);
2427                             break;
2428         }
2429
2430         if (cflag & PARENB) {
2431                 if (cflag & PARODD) {
2432                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2433                         config->bParity = UMP_UART_ODDPARITY;
2434                         dbg("%s - parity = odd", __FUNCTION__);
2435                 } else {
2436                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2437                         config->bParity = UMP_UART_EVENPARITY;
2438                         dbg("%s - parity = even", __FUNCTION__);
2439                 }
2440         } else {
2441                 config->bParity = UMP_UART_NOPARITY;
2442                 dbg("%s - parity = none", __FUNCTION__);
2443         }
2444
2445         if (cflag & CSTOPB) {
2446                 config->bStopBits = UMP_UART_STOPBIT2;
2447                 dbg("%s - stop bits = 2", __FUNCTION__);
2448         } else {
2449                 config->bStopBits = UMP_UART_STOPBIT1;
2450                 dbg("%s - stop bits = 1", __FUNCTION__);
2451         }
2452
2453         /* figure out the flow control settings */
2454         if (cflag & CRTSCTS) {
2455                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2456                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2457                 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2458         } else {
2459                 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2460                 tty->hw_stopped = 0;
2461                 restart_read(edge_port);
2462         }
2463
2464         /* if we are implementing XON/XOFF, set the start and stop character in the device */
2465         if (I_IXOFF(tty) || I_IXON(tty)) {
2466                 config->cXon  = START_CHAR(tty);
2467                 config->cXoff = STOP_CHAR(tty);
2468
2469                 /* if we are implementing INBOUND XON/XOFF */
2470                 if (I_IXOFF(tty)) {
2471                         config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2472                         dbg ("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2473                              __FUNCTION__, config->cXon, config->cXoff);
2474                 } else {
2475                         dbg ("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2476                 }
2477
2478                 /* if we are implementing OUTBOUND XON/XOFF */
2479                 if (I_IXON(tty)) {
2480                         config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2481                         dbg ("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2482                              __FUNCTION__, config->cXon, config->cXoff);
2483                 } else {
2484                         dbg ("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2485                 }
2486         }
2487
2488         tty->termios->c_cflag &= ~CMSPAR;
2489
2490         /* Round the baud rate */
2491         baud = tty_get_baud_rate(tty);
2492         if (!baud) {
2493                 /* pick a default, any default... */
2494                 baud = 9600;
2495         } else
2496                 tty_encode_baud_rate(tty, baud, baud);
2497
2498         edge_port->baud_rate = baud;
2499         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2500
2501         /* FIXME: Recompute actual baud from divisor here */
2502
2503         dbg ("%s - baud rate = %d, wBaudRate = %d", __FUNCTION__, baud, config->wBaudRate);
2504
2505         dbg ("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
2506         dbg ("wFlags:    0x%x", config->wFlags);
2507         dbg ("bDataBits:   %d", config->bDataBits);
2508         dbg ("bParity:     %d", config->bParity);
2509         dbg ("bStopBits:   %d", config->bStopBits);
2510         dbg ("cXon:        %d", config->cXon);
2511         dbg ("cXoff:       %d", config->cXoff);
2512         dbg ("bUartMode:   %d", config->bUartMode);
2513
2514         /* move the word values into big endian mode */
2515         cpu_to_be16s (&config->wFlags);
2516         cpu_to_be16s (&config->wBaudRate);
2517
2518         status = TIWriteCommandSync (edge_port->port->serial->dev,
2519                                 UMPC_SET_CONFIG,
2520                                 (__u8)(UMPM_UART1_PORT + port_number),
2521                                 0,
2522                                 (__u8 *)config,
2523                                 sizeof(*config));
2524         if (status) {
2525                 dbg ("%s - error %d when trying to write config to device",
2526                      __FUNCTION__, status);
2527         }
2528
2529         kfree (config);
2530
2531         return;
2532 }
2533
2534 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
2535 {
2536         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2537         struct tty_struct *tty = port->tty;
2538         unsigned int cflag;
2539
2540         cflag = tty->termios->c_cflag;
2541
2542         dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
2543             tty->termios->c_cflag, tty->termios->c_iflag);
2544         dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
2545             old_termios->c_cflag, old_termios->c_iflag);
2546
2547         dbg("%s - port %d", __FUNCTION__, port->number);
2548
2549         if (edge_port == NULL)
2550                 return;
2551
2552         /* change the port settings to the new ones specified */
2553         change_port_settings (edge_port, old_termios);
2554
2555         return;
2556 }
2557
2558 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
2559 {
2560         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2561         unsigned int mcr;
2562         unsigned long flags;
2563
2564         dbg("%s - port %d", __FUNCTION__, port->number);
2565
2566         spin_lock_irqsave(&edge_port->ep_lock, flags);
2567         mcr = edge_port->shadow_mcr;
2568         if (set & TIOCM_RTS)
2569                 mcr |= MCR_RTS;
2570         if (set & TIOCM_DTR)
2571                 mcr |= MCR_DTR;
2572         if (set & TIOCM_LOOP)
2573                 mcr |= MCR_LOOPBACK;
2574
2575         if (clear & TIOCM_RTS)
2576                 mcr &= ~MCR_RTS;
2577         if (clear & TIOCM_DTR)
2578                 mcr &= ~MCR_DTR;
2579         if (clear & TIOCM_LOOP)
2580                 mcr &= ~MCR_LOOPBACK;
2581
2582         edge_port->shadow_mcr = mcr;
2583         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2584
2585         TIRestoreMCR (edge_port, mcr);
2586
2587         return 0;
2588 }
2589
2590 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
2591 {
2592         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2593         unsigned int result = 0;
2594         unsigned int msr;
2595         unsigned int mcr;
2596         unsigned long flags;
2597
2598         dbg("%s - port %d", __FUNCTION__, port->number);
2599
2600         spin_lock_irqsave(&edge_port->ep_lock, flags);
2601
2602         msr = edge_port->shadow_msr;
2603         mcr = edge_port->shadow_mcr;
2604         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2605                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2606                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2607                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2608                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2609                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2610
2611
2612         dbg("%s -- %x", __FUNCTION__, result);
2613         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2614
2615         return result;
2616 }
2617
2618 static int get_serial_info (struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
2619 {
2620         struct serial_struct tmp;
2621
2622         if (!retinfo)
2623                 return -EFAULT;
2624
2625         memset(&tmp, 0, sizeof(tmp));
2626
2627         tmp.type                = PORT_16550A;
2628         tmp.line                = edge_port->port->serial->minor;
2629         tmp.port                = edge_port->port->number;
2630         tmp.irq                 = 0;
2631         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2632         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2633         tmp.baud_base           = 9600;
2634         tmp.close_delay         = 5*HZ;
2635         tmp.closing_wait        = closing_wait;
2636 //      tmp.custom_divisor      = state->custom_divisor;
2637 //      tmp.hub6                = state->hub6;
2638 //      tmp.io_type             = state->io_type;
2639
2640
2641         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2642                 return -EFAULT;
2643         return 0;
2644 }
2645
2646 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
2647 {
2648         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2649         struct async_icount cnow;
2650         struct async_icount cprev;
2651
2652         dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
2653
2654         switch (cmd) {
2655                 case TIOCINQ:
2656                         dbg("%s - (%d) TIOCINQ", __FUNCTION__, port->number);
2657 //                      return get_number_bytes_avail(edge_port, (unsigned int *) arg);
2658                         break;
2659
2660                 case TIOCSERGETLSR:
2661                         dbg("%s - (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
2662 //                      return get_lsr_info(edge_port, (unsigned int *) arg);
2663                         break;
2664
2665                 case TIOCGSERIAL:
2666                         dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
2667                         return get_serial_info(edge_port, (struct serial_struct __user *) arg);
2668                         break;
2669
2670                 case TIOCSSERIAL:
2671                         dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
2672                         break;
2673
2674                 case TIOCMIWAIT:
2675                         dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
2676                         cprev = edge_port->icount;
2677                         while (1) {
2678                                 interruptible_sleep_on(&edge_port->delta_msr_wait);
2679                                 /* see if a signal did it */
2680                                 if (signal_pending(current))
2681                                         return -ERESTARTSYS;
2682                                 cnow = edge_port->icount;
2683                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2684                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2685                                         return -EIO; /* no change => error */
2686                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2687                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2688                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2689                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
2690                                         return 0;
2691                                 }
2692                                 cprev = cnow;
2693                         }
2694                         /* not reached */
2695                         break;
2696
2697                 case TIOCGICOUNT:
2698                         dbg ("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
2699                              port->number, edge_port->icount.rx, edge_port->icount.tx);
2700                         if (copy_to_user((void __user *)arg, &edge_port->icount, sizeof(edge_port->icount)))
2701                                 return -EFAULT;
2702                         return 0;
2703         }
2704
2705         return -ENOIOCTLCMD;
2706 }
2707
2708 static void edge_break (struct usb_serial_port *port, int break_state)
2709 {
2710         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2711         int status;
2712
2713         dbg ("%s - state = %d", __FUNCTION__, break_state);
2714
2715         /* chase the port close */
2716         TIChasePort (edge_port, 0, 0);
2717
2718         if (break_state == -1) {
2719                 status = TISetBreak (edge_port);
2720         } else {
2721                 status = TIClearBreak (edge_port);
2722         }
2723         if (status) {
2724                 dbg ("%s - error %d sending break set/clear command.",
2725                      __FUNCTION__, status);
2726         }
2727 }
2728
2729 static int edge_startup (struct usb_serial *serial)
2730 {
2731         struct edgeport_serial *edge_serial;
2732         struct edgeport_port *edge_port;
2733         struct usb_device *dev;
2734         int status;
2735         int i;
2736
2737         dev = serial->dev;
2738
2739         /* create our private serial structure */
2740         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2741         if (edge_serial == NULL) {
2742                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2743                 return -ENOMEM;
2744         }
2745         mutex_init(&edge_serial->es_lock);
2746         edge_serial->serial = serial;
2747         usb_set_serial_data(serial, edge_serial);
2748
2749         status = TIDownloadFirmware (edge_serial);
2750         if (status) {
2751                 kfree (edge_serial);
2752                 return status;
2753         }
2754
2755         /* set up our port private structures */
2756         for (i = 0; i < serial->num_ports; ++i) {
2757                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2758                 if (edge_port == NULL) {
2759                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2760                         goto cleanup;
2761                 }
2762                 spin_lock_init(&edge_port->ep_lock);
2763                 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
2764                 if (edge_port->ep_out_buf == NULL) {
2765                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2766                         kfree(edge_port);
2767                         goto cleanup;
2768                 }
2769                 edge_port->port = serial->port[i];
2770                 edge_port->edge_serial = edge_serial;
2771                 usb_set_serial_port_data(serial->port[i], edge_port);
2772                 edge_port->bUartMode = default_uart_mode;
2773         }
2774
2775         return 0;
2776
2777 cleanup:
2778         for (--i; i>=0; --i) {
2779                 edge_port = usb_get_serial_port_data(serial->port[i]);
2780                 edge_buf_free(edge_port->ep_out_buf);
2781                 kfree(edge_port);
2782                 usb_set_serial_port_data(serial->port[i], NULL);
2783         }
2784         kfree (edge_serial);
2785         usb_set_serial_data(serial, NULL);
2786         return -ENOMEM;
2787 }
2788
2789 static void edge_shutdown (struct usb_serial *serial)
2790 {
2791         int i;
2792         struct edgeport_port *edge_port;
2793
2794         dbg ("%s", __FUNCTION__);
2795
2796         for (i = 0; i < serial->num_ports; ++i) {
2797                 edge_port = usb_get_serial_port_data(serial->port[i]);
2798                 edge_remove_sysfs_attrs(edge_port->port);
2799                 edge_buf_free(edge_port->ep_out_buf);
2800                 kfree(edge_port);
2801                 usb_set_serial_port_data(serial->port[i], NULL);
2802         }
2803         kfree(usb_get_serial_data(serial));
2804         usb_set_serial_data(serial, NULL);
2805 }
2806
2807
2808 /* Sysfs Attributes */
2809
2810 static ssize_t show_uart_mode(struct device *dev,
2811         struct device_attribute *attr, char *buf)
2812 {
2813         struct usb_serial_port *port = to_usb_serial_port(dev);
2814         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2815
2816         return sprintf(buf, "%d\n", edge_port->bUartMode);
2817 }
2818
2819 static ssize_t store_uart_mode(struct device *dev,
2820         struct device_attribute *attr, const char *valbuf, size_t count)
2821 {
2822         struct usb_serial_port *port = to_usb_serial_port(dev);
2823         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2824         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2825
2826         dbg("%s: setting uart_mode = %d", __FUNCTION__, v);
2827
2828         if (v < 256)
2829                 edge_port->bUartMode = v;
2830         else
2831                 dev_err(dev, "%s - uart_mode %d is invalid\n", __FUNCTION__, v);
2832
2833         return count;
2834 }
2835
2836 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode, store_uart_mode);
2837
2838 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2839 {
2840         return device_create_file(&port->dev, &dev_attr_uart_mode);
2841 }
2842
2843 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2844 {
2845         device_remove_file(&port->dev, &dev_attr_uart_mode);
2846         return 0;
2847 }
2848
2849
2850 /* Circular Buffer */
2851
2852 /*
2853  * edge_buf_alloc
2854  *
2855  * Allocate a circular buffer and all associated memory.
2856  */
2857
2858 static struct edge_buf *edge_buf_alloc(unsigned int size)
2859 {
2860         struct edge_buf *eb;
2861
2862
2863         if (size == 0)
2864                 return NULL;
2865
2866         eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
2867         if (eb == NULL)
2868                 return NULL;
2869
2870         eb->buf_buf = kmalloc(size, GFP_KERNEL);
2871         if (eb->buf_buf == NULL) {
2872                 kfree(eb);
2873                 return NULL;
2874         }
2875
2876         eb->buf_size = size;
2877         eb->buf_get = eb->buf_put = eb->buf_buf;
2878
2879         return eb;
2880 }
2881
2882
2883 /*
2884  * edge_buf_free
2885  *
2886  * Free the buffer and all associated memory.
2887  */
2888
2889 static void edge_buf_free(struct edge_buf *eb)
2890 {
2891         if (eb) {
2892                 kfree(eb->buf_buf);
2893                 kfree(eb);
2894         }
2895 }
2896
2897
2898 /*
2899  * edge_buf_clear
2900  *
2901  * Clear out all data in the circular buffer.
2902  */
2903
2904 static void edge_buf_clear(struct edge_buf *eb)
2905 {
2906         if (eb != NULL)
2907                 eb->buf_get = eb->buf_put;
2908                 /* equivalent to a get of all data available */
2909 }
2910
2911
2912 /*
2913  * edge_buf_data_avail
2914  *
2915  * Return the number of bytes of data available in the circular
2916  * buffer.
2917  */
2918
2919 static unsigned int edge_buf_data_avail(struct edge_buf *eb)
2920 {
2921         if (eb != NULL)
2922                 return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
2923         else
2924                 return 0;
2925 }
2926
2927
2928 /*
2929  * edge_buf_space_avail
2930  *
2931  * Return the number of bytes of space available in the circular
2932  * buffer.
2933  */
2934
2935 static unsigned int edge_buf_space_avail(struct edge_buf *eb)
2936 {
2937         if (eb != NULL)
2938                 return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
2939         else
2940                 return 0;
2941 }
2942
2943
2944 /*
2945  * edge_buf_put
2946  *
2947  * Copy data data from a user buffer and put it into the circular buffer.
2948  * Restrict to the amount of space available.
2949  *
2950  * Return the number of bytes copied.
2951  */
2952
2953 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
2954         unsigned int count)
2955 {
2956         unsigned int len;
2957
2958
2959         if (eb == NULL)
2960                 return 0;
2961
2962         len  = edge_buf_space_avail(eb);
2963         if (count > len)
2964                 count = len;
2965
2966         if (count == 0)
2967                 return 0;
2968
2969         len = eb->buf_buf + eb->buf_size - eb->buf_put;
2970         if (count > len) {
2971                 memcpy(eb->buf_put, buf, len);
2972                 memcpy(eb->buf_buf, buf+len, count - len);
2973                 eb->buf_put = eb->buf_buf + count - len;
2974         } else {
2975                 memcpy(eb->buf_put, buf, count);
2976                 if (count < len)
2977                         eb->buf_put += count;
2978                 else /* count == len */
2979                         eb->buf_put = eb->buf_buf;
2980         }
2981
2982         return count;
2983 }
2984
2985
2986 /*
2987  * edge_buf_get
2988  *
2989  * Get data from the circular buffer and copy to the given buffer.
2990  * Restrict to the amount of data available.
2991  *
2992  * Return the number of bytes copied.
2993  */
2994
2995 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
2996         unsigned int count)
2997 {
2998         unsigned int len;
2999
3000
3001         if (eb == NULL)
3002                 return 0;
3003
3004         len = edge_buf_data_avail(eb);
3005         if (count > len)
3006                 count = len;
3007
3008         if (count == 0)
3009                 return 0;
3010
3011         len = eb->buf_buf + eb->buf_size - eb->buf_get;
3012         if (count > len) {
3013                 memcpy(buf, eb->buf_get, len);
3014                 memcpy(buf+len, eb->buf_buf, count - len);
3015                 eb->buf_get = eb->buf_buf + count - len;
3016         } else {
3017                 memcpy(buf, eb->buf_get, count);
3018                 if (count < len)
3019                         eb->buf_get += count;
3020                 else /* count == len */
3021                         eb->buf_get = eb->buf_buf;
3022         }
3023
3024         return count;
3025 }
3026
3027
3028 static struct usb_serial_driver edgeport_1port_device = {
3029         .driver = {
3030                 .owner          = THIS_MODULE,
3031                 .name           = "edgeport_ti_1",
3032         },
3033         .description            = "Edgeport TI 1 port adapter",
3034         .usb_driver             = &io_driver,
3035         .id_table               = edgeport_1port_id_table,
3036         .num_interrupt_in       = 1,
3037         .num_bulk_in            = 1,
3038         .num_bulk_out           = 1,
3039         .num_ports              = 1,
3040         .open                   = edge_open,
3041         .close                  = edge_close,
3042         .throttle               = edge_throttle,
3043         .unthrottle             = edge_unthrottle,
3044         .attach                 = edge_startup,
3045         .shutdown               = edge_shutdown,
3046         .port_probe             = edge_create_sysfs_attrs,
3047         .ioctl                  = edge_ioctl,
3048         .set_termios            = edge_set_termios,
3049         .tiocmget               = edge_tiocmget,
3050         .tiocmset               = edge_tiocmset,
3051         .write                  = edge_write,
3052         .write_room             = edge_write_room,
3053         .chars_in_buffer        = edge_chars_in_buffer,
3054         .break_ctl              = edge_break,
3055         .read_int_callback      = edge_interrupt_callback,
3056         .read_bulk_callback     = edge_bulk_in_callback,
3057         .write_bulk_callback    = edge_bulk_out_callback,
3058 };
3059
3060 static struct usb_serial_driver edgeport_2port_device = {
3061         .driver = {
3062                 .owner          = THIS_MODULE,
3063                 .name           = "edgeport_ti_2",
3064         },
3065         .description            = "Edgeport TI 2 port adapter",
3066         .usb_driver             = &io_driver,
3067         .id_table               = edgeport_2port_id_table,
3068         .num_interrupt_in       = 1,
3069         .num_bulk_in            = 2,
3070         .num_bulk_out           = 2,
3071         .num_ports              = 2,
3072         .open                   = edge_open,
3073         .close                  = edge_close,
3074         .throttle               = edge_throttle,
3075         .unthrottle             = edge_unthrottle,
3076         .attach                 = edge_startup,
3077         .shutdown               = edge_shutdown,
3078         .port_probe             = edge_create_sysfs_attrs,
3079         .ioctl                  = edge_ioctl,
3080         .set_termios            = edge_set_termios,
3081         .tiocmget               = edge_tiocmget,
3082         .tiocmset               = edge_tiocmset,
3083         .write                  = edge_write,
3084         .write_room             = edge_write_room,
3085         .chars_in_buffer        = edge_chars_in_buffer,
3086         .break_ctl              = edge_break,
3087         .read_int_callback      = edge_interrupt_callback,
3088         .read_bulk_callback     = edge_bulk_in_callback,
3089         .write_bulk_callback    = edge_bulk_out_callback,
3090 };
3091
3092
3093 static int __init edgeport_init(void)
3094 {
3095         int retval;
3096         retval = usb_serial_register(&edgeport_1port_device);
3097         if (retval)
3098                 goto failed_1port_device_register;
3099         retval = usb_serial_register(&edgeport_2port_device);
3100         if (retval)
3101                 goto failed_2port_device_register;
3102         retval = usb_register(&io_driver);
3103         if (retval)
3104                 goto failed_usb_register;
3105         info(DRIVER_DESC " " DRIVER_VERSION);
3106         return 0;
3107 failed_usb_register:
3108         usb_serial_deregister(&edgeport_2port_device);
3109 failed_2port_device_register:
3110         usb_serial_deregister(&edgeport_1port_device);
3111 failed_1port_device_register:
3112         return retval;
3113 }
3114
3115 static void __exit edgeport_exit (void)
3116 {
3117         usb_deregister (&io_driver);
3118         usb_serial_deregister (&edgeport_1port_device);
3119         usb_serial_deregister (&edgeport_2port_device);
3120 }
3121
3122 module_init(edgeport_init);
3123 module_exit(edgeport_exit);
3124
3125 /* Module information */
3126 MODULE_AUTHOR(DRIVER_AUTHOR);
3127 MODULE_DESCRIPTION(DRIVER_DESC);
3128 MODULE_LICENSE("GPL");
3129
3130 module_param(debug, bool, S_IRUGO | S_IWUSR);
3131 MODULE_PARM_DESC(debug, "Debug enabled or not");
3132
3133 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3134 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
3135
3136 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
3137 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
3138
3139 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
3140 MODULE_PARM_DESC(ignore_cpu_rev, "Ignore the cpu revision when connecting to a device");
3141
3142 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
3143 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
3144