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 <linux/firmware.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/usb.h>
  43 #include <linux/usb/serial.h>
  44
  45 #include "io_16654.h"
  46 #include "io_usbvend.h"
  47 #include "io_ti.h"
  48
  49 /*
  50  * Version Information
  51  */
  52 #define DRIVER_VERSION "v0.7mode043006"
  53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  54 #define DRIVER_DESC "Edgeport USB Serial Driver"
  55
  56 #define EPROM_PAGE_SIZE         64
  57
  58
  59 struct edgeport_uart_buf_desc {
  60         __u32 count;            /* Number of bytes currently in buffer */
  61 };
  62
  63 /* different hardware types */
  64 #define HARDWARE_TYPE_930       0
  65 #define HARDWARE_TYPE_TIUMP     1
  66
  67 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
  68 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
  69 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
  70 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
  71 #define TI_MODE_TRANSITIONING   3   /* Currently in boot mode but
  72                                        transitioning to download mode      */
  73
  74 /* read urb state */
  75 #define EDGE_READ_URB_RUNNING   0
  76 #define EDGE_READ_URB_STOPPING  1
  77 #define EDGE_READ_URB_STOPPED   2
  78
  79 #define EDGE_LOW_LATENCY        1
  80 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
  81
  82 #define EDGE_OUT_BUF_SIZE       1024
  83
  84
  85 /* Product information read from the Edgeport */
  86 struct product_info {
  87         int     TiMode;                 /* Current TI Mode  */
  88         __u8    hardware_type;          /* Type of hardware */
  89 } __attribute__((packed));
  90
  91 /* circular buffer */
  92 struct edge_buf {
  93         unsigned int    buf_size;
  94         char            *buf_buf;
  95         char            *buf_get;
  96         char            *buf_put;
  97 };
  98
  99 struct edgeport_port {
 100         __u16 uart_base;
 101         __u16 dma_address;
 102         __u8 shadow_msr;
 103         __u8 shadow_mcr;
 104         __u8 shadow_lsr;
 105         __u8 lsr_mask;
 106         __u32 ump_read_timeout;         /* Number of miliseconds the UMP will
 107                                            wait without data before completing
 108                                            a read short */
 109         int baud_rate;
 110         int close_pending;
 111         int lsr_event;
 112         struct edgeport_uart_buf_desc tx;
 113         struct async_icount     icount;
 114         wait_queue_head_t       delta_msr_wait; /* for handling sleeping while
 115                                                    waiting for msr change to
 116                                                    happen */
 117         struct edgeport_serial  *edge_serial;
 118         struct usb_serial_port  *port;
 119         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
 120         spinlock_t ep_lock;
 121         int ep_read_urb_state;
 122         int ep_write_urb_in_use;
 123         struct edge_buf *ep_out_buf;
 124 };
 125
 126 struct edgeport_serial {
 127         struct product_info product_info;
 128         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
 129         u8 TiReadI2C;                   /* Set to TRUE if we have read the
 130                                            I2c in Boot Mode */
 131         struct mutex es_lock;
 132         int num_ports_open;
 133         struct usb_serial *serial;
 134 };
 135
 136
 137 /* Devices that this driver supports */
 138 static struct usb_device_id edgeport_1port_id_table [] = {
 139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 154         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 155         { }
 156 };
 157
 158 static struct usb_device_id edgeport_2port_id_table [] = {
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 171         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 176         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 177         { }
 178 };
 179
 180 /* Devices that this driver supports */
 181 static struct usb_device_id id_table_combined [] = {
 182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 209         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 210         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 211         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 212         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 213         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 214         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 215         { }
 216 };
 217
 218 MODULE_DEVICE_TABLE(usb, id_table_combined);
 219
 220 static struct usb_driver io_driver = {
 221         .name =         "io_ti",
 222         .probe =        usb_serial_probe,
 223         .disconnect =   usb_serial_disconnect,
 224         .id_table =     id_table_combined,
 225         .no_dynamic_id =        1,
 226 };
 227
 228
 229 static unsigned char OperationalMajorVersion;
 230 static unsigned char OperationalMinorVersion;
 231 static unsigned short OperationalBuildNumber;
 232
 233 static int debug;
 234
 235 static int low_latency = EDGE_LOW_LATENCY;
 236 static int closing_wait = EDGE_CLOSING_WAIT;
 237 static int ignore_cpu_rev;
 238 static int default_uart_mode;           /* RS232 */
 239
 240 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
 241                           unsigned char *data, int length);
 242
 243 static void stop_read(struct edgeport_port *edge_port);
 244 static int restart_read(struct edgeport_port *edge_port);
 245
 246 static void edge_set_termios(struct usb_serial_port *port,
 247                              struct ktermios *old_termios);
 248 static void edge_send(struct usb_serial_port *port);
 249
 250 /* sysfs attributes */
 251 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 252 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 253
 254 /* circular buffer */
 255 static struct edge_buf *edge_buf_alloc(unsigned int size);
 256 static void edge_buf_free(struct edge_buf *eb);
 257 static void edge_buf_clear(struct edge_buf *eb);
 258 static unsigned int edge_buf_data_avail(struct edge_buf *eb);
 259 static unsigned int edge_buf_space_avail(struct edge_buf *eb);
 260 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
 261         unsigned int count);
 262 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
 263         unsigned int count);
 264
 265
 266 static int ti_vread_sync(struct usb_device *dev, __u8 request,
 267                                 __u16 value, __u16 index, u8 *data, int size)
 268 {
 269         int status;
 270
 271         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 272                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
 273                         value, index, data, size, 1000);
 274         if (status < 0)
 275                 return status;
 276         if (status != size) {
 277                 dbg("%s - wanted to write %d, but only wrote %d",
 278                                              __func__, size, status);
 279                 return -ECOMM;
 280         }
 281         return 0;
 282 }
 283
 284 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
 285                                 __u16 value, __u16 index, u8 *data, int size)
 286 {
 287         int status;
 288
 289         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 290                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 291                         value, index, data, size, 1000);
 292         if (status < 0)
 293                 return status;
 294         if (status != size) {
 295                 dbg("%s - wanted to write %d, but only wrote %d",
 296                      __func__, size, status);
 297                 return -ECOMM;
 298         }
 299         return 0;
 300 }
 301
 302 static int send_cmd(struct usb_device *dev, __u8 command,
 303                                 __u8 moduleid, __u16 value, u8 *data,
 304                                 int size)
 305 {
 306         return ti_vsend_sync(dev, command, value, moduleid, data, size);
 307 }
 308
 309 /* clear tx/rx buffers and fifo in TI UMP */
 310 static int purge_port(struct usb_serial_port *port, __u16 mask)
 311 {
 312         int port_number = port->number - port->serial->minor;
 313
 314         dbg("%s - port %d, mask %x", __func__, port_number, mask);
 315
 316         return send_cmd(port->serial->dev,
 317                                         UMPC_PURGE_PORT,
 318                                         (__u8)(UMPM_UART1_PORT + port_number),
 319                                         mask,
 320                                         NULL,
 321                                         0);
 322 }
 323
 324 /**
 325  * read_download_mem - Read edgeport memory from TI chip
 326  * @dev: usb device pointer
 327  * @start_address: Device CPU address at which to read
 328  * @length: Length of above data
 329  * @address_type: Can read both XDATA and I2C
 330  * @buffer: pointer to input data buffer
 331  */
 332 static int read_download_mem(struct usb_device *dev, int start_address,
 333                                 int length, __u8 address_type, __u8 *buffer)
 334 {
 335         int status = 0;
 336         __u8 read_length;
 337         __be16 be_start_address;
 338
 339         dbg("%s - @ %x for %d", __func__, start_address, length);
 340
 341         /* Read in blocks of 64 bytes
 342          * (TI firmware can't handle more than 64 byte reads)
 343          */
 344         while (length) {
 345                 if (length > 64)
 346                         read_length = 64;
 347                 else
 348                         read_length = (__u8)length;
 349
 350                 if (read_length > 1) {
 351                         dbg("%s - @ %x for %d", __func__,
 352                              start_address, read_length);
 353                 }
 354                 be_start_address = cpu_to_be16(start_address);
 355                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
 356                                         (__u16)address_type,
 357                                         (__force __u16)be_start_address,
 358                                         buffer, read_length);
 359
 360                 if (status) {
 361                         dbg("%s - ERROR %x", __func__, status);
 362                         return status;
 363                 }
 364
 365                 if (read_length > 1)
 366                         usb_serial_debug_data(debug, &dev->dev, __func__,
 367                                               read_length, buffer);
 368
 369                 /* Update pointers/length */
 370                 start_address += read_length;
 371                 buffer += read_length;
 372                 length -= read_length;
 373         }
 374
 375         return status;
 376 }
 377
 378 static int read_ram(struct usb_device *dev, int start_address,
 379                                                 int length, __u8 *buffer)
 380 {
 381         return read_download_mem(dev, start_address, length,
 382                                         DTK_ADDR_SPACE_XDATA, buffer);
 383 }
 384
 385 /* Read edgeport memory to a given block */
 386 static int read_boot_mem(struct edgeport_serial *serial,
 387                                 int start_address, int length, __u8 *buffer)
 388 {
 389         int status = 0;
 390         int i;
 391
 392         for (i = 0; i < length; i++) {
 393                 status = ti_vread_sync(serial->serial->dev,
 394                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
 395                                 (__u16)(start_address+i), &buffer[i], 0x01);
 396                 if (status) {
 397                         dbg("%s - ERROR %x", __func__, status);
 398                         return status;
 399                 }
 400         }
 401
 402         dbg("%s - start_address = %x, length = %d",
 403                                         __func__, start_address, length);
 404         usb_serial_debug_data(debug, &serial->serial->dev->dev,
 405                                         __func__, length, buffer);
 406
 407         serial->TiReadI2C = 1;
 408
 409         return status;
 410 }
 411
 412 /* Write given block to TI EPROM memory */
 413 static int write_boot_mem(struct edgeport_serial *serial,
 414                                 int start_address, int length, __u8 *buffer)
 415 {
 416         int status = 0;
 417         int i;
 418         __u8 temp;
 419
 420         /* Must do a read before write */
 421         if (!serial->TiReadI2C) {
 422                 status = read_boot_mem(serial, 0, 1, &temp);
 423                 if (status)
 424                         return status;
 425         }
 426
 427         for (i = 0; i < length; ++i) {
 428                 status = ti_vsend_sync(serial->serial->dev,
 429                                 UMPC_MEMORY_WRITE, buffer[i],
 430                                 (__u16)(i + start_address), NULL, 0);
 431                 if (status)
 432                         return status;
 433         }
 434
 435         dbg("%s - start_sddr = %x, length = %d",
 436                                         __func__, start_address, length);
 437         usb_serial_debug_data(debug, &serial->serial->dev->dev,
 438                                         __func__, length, buffer);
 439
 440         return status;
 441 }
 442
 443
 444 /* Write edgeport I2C memory to TI chip */
 445 static int write_i2c_mem(struct edgeport_serial *serial,
 446                 int start_address, int length, __u8 address_type, __u8 *buffer)
 447 {
 448         int status = 0;
 449         int write_length;
 450         __be16 be_start_address;
 451
 452         /* We can only send a maximum of 1 aligned byte page at a time */
 453
 454         /* calulate the number of bytes left in the first page */
 455         write_length = EPROM_PAGE_SIZE -
 456                                 (start_address & (EPROM_PAGE_SIZE - 1));
 457
 458         if (write_length > length)
 459                 write_length = length;
 460
 461         dbg("%s - BytesInFirstPage Addr = %x, length = %d",
 462                                         __func__, start_address, write_length);
 463         usb_serial_debug_data(debug, &serial->serial->dev->dev,
 464                                                 __func__, write_length, buffer);
 465
 466         /* Write first page */
 467         be_start_address = cpu_to_be16(start_address);
 468         status = ti_vsend_sync(serial->serial->dev,
 469                                 UMPC_MEMORY_WRITE, (__u16)address_type,
 470                                 (__force __u16)be_start_address,
 471                                 buffer, write_length);
 472         if (status) {
 473                 dbg("%s - ERROR %d", __func__, status);
 474                 return status;
 475         }
 476
 477         length          -= write_length;
 478         start_address   += write_length;
 479         buffer          += write_length;
 480
 481         /* We should be aligned now -- can write
 482            max page size bytes at a time */
 483         while (length) {
 484                 if (length > EPROM_PAGE_SIZE)
 485                         write_length = EPROM_PAGE_SIZE;
 486                 else
 487                         write_length = length;
 488
 489                 dbg("%s - Page Write Addr = %x, length = %d",
 490                                         __func__, start_address, write_length);
 491                 usb_serial_debug_data(debug, &serial->serial->dev->dev,
 492                                         __func__, write_length, buffer);
 493
 494                 /* Write next page */
 495                 be_start_address = cpu_to_be16(start_address);
 496                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 497                                 (__u16)address_type,
 498                                 (__force __u16)be_start_address,
 499                                 buffer, write_length);
 500                 if (status) {
 501                         dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n",
 502                                         __func__, status);
 503                         return status;
 504                 }
 505
 506                 length          -= write_length;
 507                 start_address   += write_length;
 508                 buffer          += write_length;
 509         }
 510         return status;
 511 }
 512
 513 /* Examine the UMP DMA registers and LSR
 514  *
 515  * Check the MSBit of the X and Y DMA byte count registers.
 516  * A zero in this bit indicates that the TX DMA buffers are empty
 517  * then check the TX Empty bit in the UART.
 518  */
 519 static int tx_active(struct edgeport_port *port)
 520 {
 521         int status;
 522         struct out_endpoint_desc_block *oedb;
 523         __u8 *lsr;
 524         int bytes_left = 0;
 525
 526         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
 527         if (!oedb) {
 528                 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
 529                 return -ENOMEM;
 530         }
 531
 532         lsr = kmalloc(1, GFP_KERNEL);   /* Sigh, that's right, just one byte,
 533                                            as not all platforms can do DMA
 534                                            from stack */
 535         if (!lsr) {
 536                 kfree(oedb);
 537                 return -ENOMEM;
 538         }
 539         /* Read the DMA Count Registers */
 540         status = read_ram(port->port->serial->dev, port->dma_address,
 541                                                 sizeof(*oedb), (void *)oedb);
 542         if (status)
 543                 goto exit_is_tx_active;
 544
 545         dbg("%s - XByteCount    0x%X", __func__, oedb->XByteCount);
 546
 547         /* and the LSR */
 548         status = read_ram(port->port->serial->dev,
 549                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
 550
 551         if (status)
 552                 goto exit_is_tx_active;
 553         dbg("%s - LSR = 0x%X", __func__, *lsr);
 554
 555         /* If either buffer has data or we are transmitting then return TRUE */
 556         if ((oedb->XByteCount & 0x80) != 0)
 557                 bytes_left += 64;
 558
 559         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
 560                 bytes_left += 1;
 561
 562         /* We return Not Active if we get any kind of error */
 563 exit_is_tx_active:
 564         dbg("%s - return %d", __func__, bytes_left);
 565
 566         kfree(lsr);
 567         kfree(oedb);
 568         return bytes_left;
 569 }
 570
 571 static void chase_port(struct edgeport_port *port, unsigned long timeout,
 572                                                                 int flush)
 573 {
 574         int baud_rate;
 575         struct tty_struct *tty = port->port->tty;
 576         wait_queue_t wait;
 577         unsigned long flags;
 578
 579         if (!timeout)
 580                 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
 581
 582         /* wait for data to drain from the buffer */
 583         spin_lock_irqsave(&port->ep_lock, flags);
 584         init_waitqueue_entry(&wait, current);
 585         add_wait_queue(&tty->write_wait, &wait);
 586         for (;;) {
 587                 set_current_state(TASK_INTERRUPTIBLE);
 588                 if (edge_buf_data_avail(port->ep_out_buf) == 0
 589                 || timeout == 0 || signal_pending(current)
 590                 || !usb_get_intfdata(port->port->serial->interface))
 591                         /* disconnect */
 592                         break;
 593                 spin_unlock_irqrestore(&port->ep_lock, flags);
 594                 timeout = schedule_timeout(timeout);
 595                 spin_lock_irqsave(&port->ep_lock, flags);
 596         }
 597         set_current_state(TASK_RUNNING);
 598         remove_wait_queue(&tty->write_wait, &wait);
 599         if (flush)
 600                 edge_buf_clear(port->ep_out_buf);
 601         spin_unlock_irqrestore(&port->ep_lock, flags);
 602
 603         /* wait for data to drain from the device */
 604         timeout += jiffies;
 605         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
 606         && usb_get_intfdata(port->port->serial->interface)) {
 607                 /* not disconnected */
 608                 if (!tx_active(port))
 609                         break;
 610                 msleep(10);
 611         }
 612
 613         /* disconnected */
 614         if (!usb_get_intfdata(port->port->serial->interface))
 615                 return;
 616
 617         /* wait one more character time, based on baud rate */
 618         /* (tx_active doesn't seem to wait for the last byte) */
 619         baud_rate = port->baud_rate;
 620         if (baud_rate == 0)
 621                 baud_rate = 50;
 622         msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
 623 }
 624
 625 static int choose_config(struct usb_device *dev)
 626 {
 627         /*
 628          * There may be multiple configurations on this device, in which case
 629          * we would need to read and parse all of them to find out which one
 630          * we want. However, we just support one config at this point,
 631          * configuration # 1, which is Config Descriptor 0.
 632          */
 633
 634         dbg("%s - Number of Interfaces = %d",
 635                                 __func__, dev->config->desc.bNumInterfaces);
 636         dbg("%s - MAX Power            = %d",
 637                                 __func__, dev->config->desc.bMaxPower * 2);
 638
 639         if (dev->config->desc.bNumInterfaces != 1) {
 640                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
 641                                                                 __func__);
 642                 return -ENODEV;
 643         }
 644
 645         return 0;
 646 }
 647
 648 static int read_rom(struct edgeport_serial *serial,
 649                                 int start_address, int length, __u8 *buffer)
 650 {
 651         int status;
 652
 653         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 654                 status = read_download_mem(serial->serial->dev,
 655                                                start_address,
 656                                                length,
 657                                                serial->TI_I2C_Type,
 658                                                buffer);
 659         } else {
 660                 status = read_boot_mem(serial, start_address, length,
 661                                                                 buffer);
 662         }
 663         return status;
 664 }
 665
 666 static int write_rom(struct edgeport_serial *serial, int start_address,
 667                                                 int length, __u8 *buffer)
 668 {
 669         if (serial->product_info.TiMode == TI_MODE_BOOT)
 670                 return write_boot_mem(serial, start_address, length,
 671                                                                 buffer);
 672
 673         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 674                 return write_i2c_mem(serial, start_address, length,
 675                                                 serial->TI_I2C_Type, buffer);
 676         return -EINVAL;
 677 }
 678
 679
 680
 681 /* Read a descriptor header from I2C based on type */
 682 static int get_descriptor_addr(struct edgeport_serial *serial,
 683                                 int desc_type, struct ti_i2c_desc *rom_desc)
 684 {
 685         int start_address;
 686         int status;
 687
 688         /* Search for requested descriptor in I2C */
 689         start_address = 2;
 690         do {
 691                 status = read_rom(serial,
 692                                    start_address,
 693                                    sizeof(struct ti_i2c_desc),
 694                                    (__u8 *)rom_desc);
 695                 if (status)
 696                         return 0;
 697
 698                 if (rom_desc->Type == desc_type)
 699                         return start_address;
 700
 701                 start_address = start_address + sizeof(struct ti_i2c_desc)
 702                                                         + rom_desc->Size;
 703
 704         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 705
 706         return 0;
 707 }
 708
 709 /* Validate descriptor checksum */
 710 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 711 {
 712         __u16 i;
 713         __u8 cs = 0;
 714
 715         for (i = 0; i < rom_desc->Size; i++)
 716                 cs = (__u8)(cs + buffer[i]);
 717
 718         if (cs != rom_desc->CheckSum) {
 719                 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 720                 return -EINVAL;
 721         }
 722         return 0;
 723 }
 724
 725 /* Make sure that the I2C image is good */
 726 static int check_i2c_image(struct edgeport_serial *serial)
 727 {
 728         struct device *dev = &serial->serial->dev->dev;
 729         int status = 0;
 730         struct ti_i2c_desc *rom_desc;
 731         int start_address = 2;
 732         __u8 *buffer;
 733         __u16 ttype;
 734
 735         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 736         if (!rom_desc) {
 737                 dev_err(dev, "%s - out of memory\n", __func__);
 738                 return -ENOMEM;
 739         }
 740         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 741         if (!buffer) {
 742                 dev_err(dev, "%s - out of memory when allocating buffer\n",
 743                                                                 __func__);
 744                 kfree(rom_desc);
 745                 return -ENOMEM;
 746         }
 747
 748         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 749         status = read_rom(serial, 0, 1, buffer);
 750         if (status)
 751                 goto out;
 752
 753         if (*buffer != UMP5152 && *buffer != UMP3410) {
 754                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 755                 status = -ENODEV;
 756                 goto out;
 757         }
 758
 759         do {
 760                 /* Validate the I2C */
 761                 status = read_rom(serial,
 762                                 start_address,
 763                                 sizeof(struct ti_i2c_desc),
 764                                 (__u8 *)rom_desc);
 765                 if (status)
 766                         break;
 767
 768                 if ((start_address + sizeof(struct ti_i2c_desc) +
 769                                         rom_desc->Size) > TI_MAX_I2C_SIZE) {
 770                         status = -ENODEV;
 771                         dbg("%s - structure too big, erroring out.", __func__);
 772                         break;
 773                 }
 774
 775                 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
 776
 777                 /* Skip type 2 record */
 778                 ttype = rom_desc->Type & 0x0f;
 779                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 780                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 781                         /* Read the descriptor data */
 782                         status = read_rom(serial, start_address +
 783                                                 sizeof(struct ti_i2c_desc),
 784                                                 rom_desc->Size, buffer);
 785                         if (status)
 786                                 break;
 787
 788                         status = valid_csum(rom_desc, buffer);
 789                         if (status)
 790                                 break;
 791                 }
 792                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 793                                                                 rom_desc->Size;
 794
 795         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 796                                 (start_address < TI_MAX_I2C_SIZE));
 797
 798         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 799                                 (start_address > TI_MAX_I2C_SIZE))
 800                 status = -ENODEV;
 801
 802 out:
 803         kfree(buffer);
 804         kfree(rom_desc);
 805         return status;
 806 }
 807
 808 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
 809 {
 810         int status;
 811         int start_address;
 812         struct ti_i2c_desc *rom_desc;
 813         struct edge_ti_manuf_descriptor *desc;
 814
 815         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 816         if (!rom_desc) {
 817                 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
 818                                                                 __func__);
 819                 return -ENOMEM;
 820         }
 821         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 822                                                                 rom_desc);
 823
 824         if (!start_address) {
 825                 dbg("%s - Edge Descriptor not found in I2C", __func__);
 826                 status = -ENODEV;
 827                 goto exit;
 828         }
 829
 830         /* Read the descriptor data */
 831         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 832                                                 rom_desc->Size, buffer);
 833         if (status)
 834                 goto exit;
 835
 836         status = valid_csum(rom_desc, buffer);
 837
 838         desc = (struct edge_ti_manuf_descriptor *)buffer;
 839         dbg("%s - IonConfig      0x%x", __func__, desc->IonConfig);
 840         dbg("%s - Version          %d", __func__, desc->Version);
 841         dbg("%s - Cpu/Board      0x%x", __func__, desc->CpuRev_BoardRev);
 842         dbg("%s - NumPorts         %d", __func__, desc->NumPorts);
 843         dbg("%s - NumVirtualPorts  %d", __func__, desc->NumVirtualPorts);
 844         dbg("%s - TotalPorts       %d", __func__, desc->TotalPorts);
 845
 846 exit:
 847         kfree(rom_desc);
 848         return status;
 849 }
 850
 851 /* Build firmware header used for firmware update */
 852 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
 853 {
 854         __u8 *buffer;
 855         int buffer_size;
 856         int i;
 857         int err;
 858         __u8 cs = 0;
 859         struct ti_i2c_desc *i2c_header;
 860         struct ti_i2c_image_header *img_header;
 861         struct ti_i2c_firmware_rec *firmware_rec;
 862         const struct firmware *fw;
 863         const char *fw_name = "edgeport/down3.bin";
 864
 865         /* In order to update the I2C firmware we must change the type 2 record
 866          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 867          * Then while in boot mode, the driver will download the latest
 868          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 869          * device comes back up in download mode the driver will cause the new
 870          * firmware to be copied from the UMP Ram to I2C and the firmware will
 871          * update the record type from 0xf2 to 0x02.
 872          */
 873
 874         /* Allocate a 15.5k buffer + 2 bytes for version number
 875          * (Firmware Record) */
 876         buffer_size = (((1024 * 16) - 512 ) +
 877                         sizeof(struct ti_i2c_firmware_rec));
 878
 879         buffer = kmalloc(buffer_size, GFP_KERNEL);
 880         if (!buffer) {
 881                 dev_err(dev, "%s - out of memory\n", __func__);
 882                 return -ENOMEM;
 883         }
 884
 885         // Set entire image of 0xffs
 886         memset(buffer, 0xff, buffer_size);
 887
 888         err = request_firmware(&fw, fw_name, dev);
 889         if (err) {
 890                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 891                        fw_name, err);
 892                 kfree(buffer);
 893                 return err;
 894         }
 895
 896         /* Save Download Version Number */
 897         OperationalMajorVersion = fw->data[0];
 898         OperationalMinorVersion = fw->data[1];
 899         OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
 900
 901         /* Copy version number into firmware record */
 902         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 903
 904         firmware_rec->Ver_Major = OperationalMajorVersion;
 905         firmware_rec->Ver_Minor = OperationalMinorVersion;
 906
 907         /* Pointer to fw_down memory image */
 908         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 909
 910         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 911                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 912                 le16_to_cpu(img_header->Length));
 913
 914         release_firmware(fw);
 915
 916         for (i=0; i < buffer_size; i++) {
 917                 cs = (__u8)(cs + buffer[i]);
 918         }
 919
 920         kfree(buffer);
 921
 922         /* Build new header */
 923         i2c_header =  (struct ti_i2c_desc *)header;
 924         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 925
 926         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 927         i2c_header->Size        = (__u16)buffer_size;
 928         i2c_header->CheckSum    = cs;
 929         firmware_rec->Ver_Major = OperationalMajorVersion;
 930         firmware_rec->Ver_Minor = OperationalMinorVersion;
 931
 932         return 0;
 933 }
 934
 935 /* Try to figure out what type of I2c we have */
 936 static int i2c_type_bootmode(struct edgeport_serial *serial)
 937 {
 938         int status;
 939         __u8 data;
 940
 941         /* Try to read type 2 */
 942         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 943                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01);
 944         if (status)
 945                 dbg("%s - read 2 status error = %d", __func__, status);
 946         else
 947                 dbg("%s - read 2 data = 0x%x", __func__, data);
 948         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 949                 dbg("%s - ROM_TYPE_II", __func__);
 950                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 951                 return 0;
 952         }
 953
 954         /* Try to read type 3 */
 955         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 956                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01);
 957         if (status)
 958                 dbg("%s - read 3 status error = %d", __func__, status);
 959         else
 960                 dbg("%s - read 2 data = 0x%x", __func__, data);
 961         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 962                 dbg("%s - ROM_TYPE_III", __func__);
 963                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 964                 return 0;
 965         }
 966
 967         dbg("%s - Unknown", __func__);
 968         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 969         return -ENODEV;
 970 }
 971
 972 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 973                                                 int length, int *num_sent)
 974 {
 975         int status;
 976
 977         status = usb_bulk_msg(serial->dev,
 978                         usb_sndbulkpipe(serial->dev,
 979                                 serial->port[0]->bulk_out_endpointAddress),
 980                         buffer, length, num_sent, 1000);
 981         return status;
 982 }
 983
 984 /* Download given firmware image to the device (IN BOOT MODE) */
 985 static int download_code(struct edgeport_serial *serial, __u8 *image,
 986                                                         int image_length)
 987 {
 988         int status = 0;
 989         int pos;
 990         int transfer;
 991         int done;
 992
 993         /* Transfer firmware image */
 994         for (pos = 0; pos < image_length; ) {
 995                 /* Read the next buffer from file */
 996                 transfer = image_length - pos;
 997                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 998                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
 999
1000                 /* Transfer data */
1001                 status = bulk_xfer(serial->serial, &image[pos],
1002                                                         transfer, &done);
1003                 if (status)
1004                         break;
1005                 /* Advance buffer pointer */
1006                 pos += done;
1007         }
1008
1009         return status;
1010 }
1011
1012 /* FIXME!!! */
1013 static int config_boot_dev(struct usb_device *dev)
1014 {
1015         return 0;
1016 }
1017
1018 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
1019 {
1020         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
1021 }
1022
1023 /**
1024  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1025  *
1026  * This routine downloads the main operating code into the TI5052, using the
1027  * boot code already burned into E2PROM or ROM.
1028  */
1029 static int download_fw(struct edgeport_serial *serial)
1030 {
1031         struct device *dev = &serial->serial->dev->dev;
1032         int status = 0;
1033         int start_address;
1034         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1035         struct usb_interface_descriptor *interface;
1036         int download_cur_ver;
1037         int download_new_ver;
1038
1039         /* This routine is entered by both the BOOT mode and the Download mode
1040          * We can determine which code is running by the reading the config
1041          * descriptor and if we have only one bulk pipe it is in boot mode
1042          */
1043         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1044
1045         /* Default to type 2 i2c */
1046         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1047
1048         status = choose_config(serial->serial->dev);
1049         if (status)
1050                 return status;
1051
1052         interface = &serial->serial->interface->cur_altsetting->desc;
1053         if (!interface) {
1054                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1055                 return -ENODEV;
1056         }
1057
1058         /*
1059          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1060          * if we have more than one endpoint we are definitely in download
1061          * mode
1062          */
1063         if (interface->bNumEndpoints > 1)
1064                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1065         else
1066                 /* Otherwise we will remain in configuring mode */
1067                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1068
1069         /********************************************************************/
1070         /* Download Mode */
1071         /********************************************************************/
1072         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1073                 struct ti_i2c_desc *rom_desc;
1074
1075                 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1076
1077                 status = check_i2c_image(serial);
1078                 if (status) {
1079                         dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1080                         return status;
1081                 }
1082
1083                 /* Validate Hardware version number
1084                  * Read Manufacturing Descriptor from TI Based Edgeport
1085                  */
1086                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1087                 if (!ti_manuf_desc) {
1088                         dev_err(dev, "%s - out of memory.\n", __func__);
1089                         return -ENOMEM;
1090                 }
1091                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1092                 if (status) {
1093                         kfree(ti_manuf_desc);
1094                         return status;
1095                 }
1096
1097                 /* Check version number of ION descriptor */
1098                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1099                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1100                                 __func__, ti_cpu_rev(ti_manuf_desc));
1101                         kfree(ti_manuf_desc);
1102                         return -EINVAL;
1103                 }
1104
1105                 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1106                 if (!rom_desc) {
1107                         dev_err(dev, "%s - out of memory.\n", __func__);
1108                         kfree(ti_manuf_desc);
1109                         return -ENOMEM;
1110                 }
1111
1112                 /* Search for type 2 record (firmware record) */
1113                 start_address = get_descriptor_addr(serial,
1114                                 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1115                 if (start_address != 0) {
1116                         struct ti_i2c_firmware_rec *firmware_version;
1117                         __u8 record;
1118
1119                         dbg("%s - Found Type FIRMWARE (Type 2) record",
1120                                                                 __func__);
1121
1122                         firmware_version = kmalloc(sizeof(*firmware_version),
1123                                                                 GFP_KERNEL);
1124                         if (!firmware_version) {
1125                                 dev_err(dev, "%s - out of memory.\n", __func__);
1126                                 kfree(rom_desc);
1127                                 kfree(ti_manuf_desc);
1128                                 return -ENOMEM;
1129                         }
1130
1131                         /* Validate version number
1132                          * Read the descriptor data
1133                          */
1134                         status = read_rom(serial, start_address +
1135                                         sizeof(struct ti_i2c_desc),
1136                                         sizeof(struct ti_i2c_firmware_rec),
1137                                         (__u8 *)firmware_version);
1138                         if (status) {
1139                                 kfree(firmware_version);
1140                                 kfree(rom_desc);
1141                                 kfree(ti_manuf_desc);
1142                                 return status;
1143                         }
1144
1145                         /* Check version number of download with current
1146                            version in I2c */
1147                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1148                                            (firmware_version->Ver_Minor);
1149                         download_new_ver = (OperationalMajorVersion << 8) +
1150                                            (OperationalMinorVersion);
1151
1152                         dbg("%s - >> FW Versions Device %d.%d  Driver %d.%d",
1153                             __func__,
1154                             firmware_version->Ver_Major,
1155                             firmware_version->Ver_Minor,
1156                             OperationalMajorVersion,
1157                             OperationalMinorVersion);
1158
1159                         /* Check if we have an old version in the I2C and
1160                            update if necessary */
1161                         if (download_cur_ver != download_new_ver) {
1162                                 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1163                                     __func__,
1164                                     firmware_version->Ver_Major,
1165                                     firmware_version->Ver_Minor,
1166                                     OperationalMajorVersion,
1167                                     OperationalMinorVersion);
1168
1169                                 /* In order to update the I2C firmware we must
1170                                  * change the type 2 record to type 0xF2. This
1171                                  * will force the UMP to come up in Boot Mode.
1172                                  * Then while in boot mode, the driver will
1173                                  * download the latest firmware (padded to
1174                                  * 15.5k) into the UMP ram. Finally when the
1175                                  * device comes back up in download mode the
1176                                  * driver will cause the new firmware to be
1177                                  * copied from the UMP Ram to I2C and the
1178                                  * firmware will update the record type from
1179                                  * 0xf2 to 0x02.
1180                                  */
1181                                 record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1182
1183                                 /* Change the I2C Firmware record type to
1184                                    0xf2 to trigger an update */
1185                                 status = write_rom(serial, start_address,
1186                                                 sizeof(record), &record);
1187                                 if (status) {
1188                                         kfree(firmware_version);
1189                                         kfree(rom_desc);
1190                                         kfree(ti_manuf_desc);
1191                                         return status;
1192                                 }
1193
1194                                 /* verify the write -- must do this in order
1195                                  * for write to complete before we do the
1196                                  * hardware reset
1197                                  */
1198                                 status = read_rom(serial,
1199                                                         start_address,
1200                                                         sizeof(record),
1201                                                         &record);
1202                                 if (status) {
1203                                         kfree(firmware_version);
1204                                         kfree(rom_desc);
1205                                         kfree(ti_manuf_desc);
1206                                         return status;
1207                                 }
1208
1209                                 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1210                                         dev_err(dev,
1211                                                 "%s - error resetting device\n",
1212                                                 __func__);
1213                                         kfree(firmware_version);
1214                                         kfree(rom_desc);
1215                                         kfree(ti_manuf_desc);
1216                                         return -ENODEV;
1217                                 }
1218
1219                                 dbg("%s - HARDWARE RESET", __func__);
1220
1221                                 /* Reset UMP -- Back to BOOT MODE */
1222                                 status = ti_vsend_sync(serial->serial->dev,
1223                                                 UMPC_HARDWARE_RESET,
1224                                                 0, 0, NULL, 0);
1225
1226                                 dbg("%s - HARDWARE RESET return %d",
1227                                                 __func__, status);
1228
1229                                 /* return an error on purpose. */
1230                                 kfree(firmware_version);
1231                                 kfree(rom_desc);
1232                                 kfree(ti_manuf_desc);
1233                                 return -ENODEV;
1234                         }
1235                         kfree(firmware_version);
1236                 }
1237                 /* Search for type 0xF2 record (firmware blank record) */
1238                 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1239 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1240                                         sizeof(struct ti_i2c_firmware_rec))
1241                         __u8 *header;
1242                         __u8 *vheader;
1243
1244                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1245                         if (!header) {
1246                                 dev_err(dev, "%s - out of memory.\n", __func__);
1247                                 kfree(rom_desc);
1248                                 kfree(ti_manuf_desc);
1249                                 return -ENOMEM;
1250                         }
1251
1252                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1253                         if (!vheader) {
1254                                 dev_err(dev, "%s - out of memory.\n", __func__);
1255                                 kfree(header);
1256                                 kfree(rom_desc);
1257                                 kfree(ti_manuf_desc);
1258                                 return -ENOMEM;
1259                         }
1260
1261                         dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1262                                                                 __func__);
1263
1264                         /*
1265                          * In order to update the I2C firmware we must change
1266                          * the type 2 record to type 0xF2. This will force the
1267                          * UMP to come up in Boot Mode.  Then while in boot
1268                          * mode, the driver will download the latest firmware
1269                          * (padded to 15.5k) into the UMP ram. Finally when the
1270                          * device comes back up in download mode the driver
1271                          * will cause the new firmware to be copied from the
1272                          * UMP Ram to I2C and the firmware will update the
1273                          * record type from 0xf2 to 0x02.
1274                          */
1275                         status = build_i2c_fw_hdr(header, dev);
1276                         if (status) {
1277                                 kfree(vheader);
1278                                 kfree(header);
1279                                 kfree(rom_desc);
1280                                 kfree(ti_manuf_desc);
1281                                 return status;
1282                         }
1283
1284                         /* Update I2C with type 0xf2 record with correct
1285                            size and checksum */
1286                         status = write_rom(serial,
1287                                                 start_address,
1288                                                 HEADER_SIZE,
1289                                                 header);
1290                         if (status) {
1291                                 kfree(vheader);
1292                                 kfree(header);
1293                                 kfree(rom_desc);
1294                                 kfree(ti_manuf_desc);
1295                                 return status;
1296                         }
1297
1298                         /* verify the write -- must do this in order for
1299                            write to complete before we do the hardware reset */
1300                         status = read_rom(serial, start_address,
1301                                                         HEADER_SIZE, vheader);
1302
1303                         if (status) {
1304                                 dbg("%s - can't read header back", __func__);
1305                                 kfree(vheader);
1306                                 kfree(header);
1307                                 kfree(rom_desc);
1308                                 kfree(ti_manuf_desc);
1309                                 return status;
1310                         }
1311                         if (memcmp(vheader, header, HEADER_SIZE)) {
1312                                 dbg("%s - write download record failed",
1313                                         __func__);
1314                                 kfree(vheader);
1315                                 kfree(header);
1316                                 kfree(rom_desc);
1317                                 kfree(ti_manuf_desc);
1318                                 return status;
1319                         }
1320
1321                         kfree(vheader);
1322                         kfree(header);
1323
1324                         dbg("%s - Start firmware update", __func__);
1325
1326                         /* Tell firmware to copy download image into I2C */
1327                         status = ti_vsend_sync(serial->serial->dev,
1328                                         UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1329
1330                         dbg("%s - Update complete 0x%x", __func__, status);
1331                         if (status) {
1332                                 dev_err(dev,
1333                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1334                                                                 __func__);
1335                                 kfree(rom_desc);
1336                                 kfree(ti_manuf_desc);
1337                                 return status;
1338                         }
1339                 }
1340
1341                 // The device is running the download code
1342                 kfree(rom_desc);
1343                 kfree(ti_manuf_desc);
1344                 return 0;
1345         }
1346
1347         /********************************************************************/
1348         /* Boot Mode */
1349         /********************************************************************/
1350         dbg("%s - RUNNING IN BOOT MODE", __func__);
1351
1352         /* Configure the TI device so we can use the BULK pipes for download */
1353         status = config_boot_dev(serial->serial->dev);
1354         if (status)
1355                 return status;
1356
1357         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1358                                                         != USB_VENDOR_ID_ION) {
1359                 dbg("%s - VID = 0x%x", __func__,
1360                      le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1361                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1362                 goto stayinbootmode;
1363         }
1364
1365         /* We have an ION device (I2c Must be programmed)
1366            Determine I2C image type */
1367         if (i2c_type_bootmode(serial))
1368                 goto stayinbootmode;
1369
1370         /* Check for ION Vendor ID and that the I2C is valid */
1371         if (!check_i2c_image(serial)) {
1372                 struct ti_i2c_image_header *header;
1373                 int i;
1374                 __u8 cs = 0;
1375                 __u8 *buffer;
1376                 int buffer_size;
1377                 int err;
1378                 const struct firmware *fw;
1379                 const char *fw_name = "edgeport/down3.bin";
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", __func__);
1387                         return -ENOMEM;
1388                 }
1389                 status = get_manuf_info(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_cpu_rev(ti_manuf_desc) < 2) {
1397                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1398                                         __func__, ti_cpu_rev(ti_manuf_desc));
1399                         kfree(ti_manuf_desc);
1400                         goto stayinbootmode;
1401                 }
1402
1403                 kfree(ti_manuf_desc);
1404
1405                 /*
1406                  * In order to update the I2C firmware we must change the type
1407                  * 2 record to type 0xF2. This will force the UMP to come up
1408                  * in Boot Mode.  Then while in boot mode, the driver will
1409                  * download the latest firmware (padded to 15.5k) into the
1410                  * UMP ram. Finally when the device comes back up in download
1411                  * mode the driver will cause the new firmware to be copied
1412                  * from the UMP Ram to I2C and the firmware will update the
1413                  * record type from 0xf2 to 0x02.
1414                  *
1415                  * Do we really have to copy the whole firmware image,
1416                  * or could we do this in place!
1417                  */
1418
1419                 /* Allocate a 15.5k buffer + 3 byte header */
1420                 buffer_size = (((1024 * 16) - 512) +
1421                                         sizeof(struct ti_i2c_image_header));
1422                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1423                 if (!buffer) {
1424                         dev_err(dev, "%s - out of memory\n", __func__);
1425                         return -ENOMEM;
1426                 }
1427
1428                 /* Initialize the buffer to 0xff (pad the buffer) */
1429                 memset(buffer, 0xff, buffer_size);
1430
1431                 err = request_firmware(&fw, fw_name, dev);
1432                 if (err) {
1433                         printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1434                                fw_name, err);
1435                         kfree(buffer);
1436                         return err;
1437                 }
1438                 memcpy(buffer, &fw->data[4], fw->size - 4);
1439                 release_firmware(fw);
1440
1441                 for (i = sizeof(struct ti_i2c_image_header);
1442                                 i < buffer_size; i++) {
1443                         cs = (__u8)(cs + buffer[i]);
1444                 }
1445
1446                 header = (struct ti_i2c_image_header *)buffer;
1447
1448                 /* update length and checksum after padding */
1449                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1450                                         sizeof(struct ti_i2c_image_header)));
1451                 header->CheckSum = cs;
1452
1453                 /* Download the operational code  */
1454                 dbg("%s - Downloading operational code image (TI UMP)",
1455                                                                 __func__);
1456                 status = download_code(serial, buffer, buffer_size);
1457
1458                 kfree(buffer);
1459
1460                 if (status) {
1461                         dbg("%s - Error downloading operational code image",
1462                                                                 __func__);
1463                         return status;
1464                 }
1465
1466                 /* Device will reboot */
1467                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1468
1469                 dbg("%s - Download successful -- Device rebooting...",
1470                                                                 __func__);
1471
1472                 /* return an error on purpose */
1473                 return -ENODEV;
1474         }
1475
1476 stayinbootmode:
1477         /* Eprom is invalid or blank stay in boot mode */
1478         dbg("%s - STAYING IN BOOT MODE", __func__);
1479         serial->product_info.TiMode = TI_MODE_BOOT;
1480
1481         return 0;
1482 }
1483
1484
1485 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1486 {
1487         int port_number = port->port->number - port->port->serial->minor;
1488         on = !!on;      /* 1 or 0 not bitmask */
1489         return send_cmd(port->port->serial->dev,
1490                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1491                         on, NULL, 0);
1492 }
1493
1494
1495 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1496 {
1497         int status = 0;
1498
1499         dbg("%s - %x", __func__, mcr);
1500
1501         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1502         if (status)
1503                 return status;
1504         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1505         if (status)
1506                 return status;
1507         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1508 }
1509
1510 /* Convert TI LSR to standard UART flags */
1511 static __u8 map_line_status(__u8 ti_lsr)
1512 {
1513         __u8 lsr = 0;
1514
1515 #define MAP_FLAG(flagUmp, flagUart)    \
1516         if (ti_lsr & flagUmp) \
1517                 lsr |= flagUart;
1518
1519         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1520         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1521         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1522         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1523         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1524         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1525
1526 #undef MAP_FLAG
1527
1528         return lsr;
1529 }
1530
1531 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1532 {
1533         struct async_icount *icount;
1534         struct tty_struct *tty;
1535
1536         dbg("%s - %02x", __func__, msr);
1537
1538         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1539                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1540                 icount = &edge_port->icount;
1541
1542                 /* update input line counters */
1543                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1544                         icount->cts++;
1545                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1546                         icount->dsr++;
1547                 if (msr & EDGEPORT_MSR_DELTA_CD)
1548                         icount->dcd++;
1549                 if (msr & EDGEPORT_MSR_DELTA_RI)
1550                         icount->rng++;
1551                 wake_up_interruptible(&edge_port->delta_msr_wait);
1552         }
1553
1554         /* Save the new modem status */
1555         edge_port->shadow_msr = msr & 0xf0;
1556
1557         tty = edge_port->port->tty;
1558         /* handle CTS flow control */
1559         if (tty && C_CRTSCTS(tty)) {
1560                 if (msr & EDGEPORT_MSR_CTS) {
1561                         tty->hw_stopped = 0;
1562                         tty_wakeup(tty);
1563                 } else {
1564                         tty->hw_stopped = 1;
1565                 }
1566         }
1567
1568         return;
1569 }
1570
1571 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1572                                                         __u8 lsr, __u8 data)
1573 {
1574         struct async_icount *icount;
1575         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1576                                                 LSR_FRM_ERR | LSR_BREAK));
1577
1578         dbg("%s - %02x", __func__, new_lsr);
1579
1580         edge_port->shadow_lsr = lsr;
1581
1582         if (new_lsr & LSR_BREAK)
1583                 /*
1584                  * Parity and Framing errors only count if they
1585                  * occur exclusive of a break being received.
1586                  */
1587                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1588
1589         /* Place LSR data byte into Rx buffer */
1590         if (lsr_data && edge_port->port->tty)
1591                 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty,
1592                                                                 &data, 1);
1593
1594         /* update input line counters */
1595         icount = &edge_port->icount;
1596         if (new_lsr & LSR_BREAK)
1597                 icount->brk++;
1598         if (new_lsr & LSR_OVER_ERR)
1599                 icount->overrun++;
1600         if (new_lsr & LSR_PAR_ERR)
1601                 icount->parity++;
1602         if (new_lsr & LSR_FRM_ERR)
1603                 icount->frame++;
1604 }
1605
1606
1607 static void edge_interrupt_callback(struct urb *urb)
1608 {
1609         struct edgeport_serial *edge_serial = urb->context;
1610         struct usb_serial_port *port;
1611         struct edgeport_port *edge_port;
1612         unsigned char *data = urb->transfer_buffer;
1613         int length = urb->actual_length;
1614         int port_number;
1615         int function;
1616         int retval;
1617         __u8 lsr;
1618         __u8 msr;
1619         int status = urb->status;
1620
1621         dbg("%s", __func__);
1622
1623         switch (status) {
1624         case 0:
1625                 /* success */
1626                 break;
1627         case -ECONNRESET:
1628         case -ENOENT:
1629         case -ESHUTDOWN:
1630                 /* this urb is terminated, clean up */
1631                 dbg("%s - urb shutting down with status: %d",
1632                     __func__, status);
1633                 return;
1634         default:
1635                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1636                         "%d\n", __func__, status);
1637                 goto exit;
1638         }
1639
1640         if (!length) {
1641                 dbg("%s - no data in urb", __func__);
1642                 goto exit;
1643         }
1644
1645         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1646                                                 __func__, length, data);
1647
1648         if (length != 2) {
1649                 dbg("%s - expecting packet of size 2, got %d",
1650                                                         __func__, length);
1651                 goto exit;
1652         }
1653
1654         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1655         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1656         dbg("%s - port_number %d, function %d, info 0x%x",
1657              __func__, port_number, function, data[1]);
1658         port = edge_serial->serial->port[port_number];
1659         edge_port = usb_get_serial_port_data(port);
1660         if (!edge_port) {
1661                 dbg("%s - edge_port not found", __func__);
1662                 return;
1663         }
1664         switch (function) {
1665         case TIUMP_INTERRUPT_CODE_LSR:
1666                 lsr = map_line_status(data[1]);
1667                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1668                         /* Save the LSR event for bulk read
1669                            completion routine */
1670                         dbg("%s - LSR Event Port %u LSR Status = %02x",
1671                              __func__, port_number, lsr);
1672                         edge_port->lsr_event = 1;
1673                         edge_port->lsr_mask = lsr;
1674                 } else {
1675                         dbg("%s - ===== Port %d LSR Status = %02x ======",
1676                              __func__, port_number, lsr);
1677                         handle_new_lsr(edge_port, 0, lsr, 0);
1678                 }
1679                 break;
1680
1681         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1682                 /* Copy MSR from UMP */
1683                 msr = data[1];
1684                 dbg("%s - ===== Port %u MSR Status = %02x ======\n",
1685                      __func__, port_number, msr);
1686                 handle_new_msr(edge_port, msr);
1687                 break;
1688
1689         default:
1690                 dev_err(&urb->dev->dev,
1691                         "%s - Unknown Interrupt code from UMP %x\n",
1692                         __func__, data[1]);
1693                 break;
1694
1695         }
1696
1697 exit:
1698         retval = usb_submit_urb(urb, GFP_ATOMIC);
1699         if (retval)
1700                 dev_err(&urb->dev->dev,
1701                         "%s - usb_submit_urb failed with result %d\n",
1702                          __func__, retval);
1703 }
1704
1705 static void edge_bulk_in_callback(struct urb *urb)
1706 {
1707         struct edgeport_port *edge_port = urb->context;
1708         unsigned char *data = urb->transfer_buffer;
1709         struct tty_struct *tty;
1710         int retval = 0;
1711         int port_number;
1712         int status = urb->status;
1713
1714         dbg("%s", __func__);
1715
1716         switch (status) {
1717         case 0:
1718                 /* success */
1719                 break;
1720         case -ECONNRESET:
1721         case -ENOENT:
1722         case -ESHUTDOWN:
1723                 /* this urb is terminated, clean up */
1724                 dbg("%s - urb shutting down with status: %d",
1725                     __func__, status);
1726                 return;
1727         default:
1728                 dev_err(&urb->dev->dev,
1729                         "%s - nonzero read bulk status received: %d\n",
1730                              __func__, status);
1731         }
1732
1733         if (status == -EPIPE)
1734                 goto exit;
1735
1736         if (status) {
1737                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1738                 return;
1739         }
1740
1741         port_number = edge_port->port->number - edge_port->port->serial->minor;
1742
1743         if (edge_port->lsr_event) {
1744                 edge_port->lsr_event = 0;
1745                 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1746                      __func__, port_number, edge_port->lsr_mask, *data);
1747                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1748                 /* Adjust buffer length/pointer */
1749                 --urb->actual_length;
1750                 ++data;
1751         }
1752
1753         tty = edge_port->port->tty;
1754         if (tty && urb->actual_length) {
1755                 usb_serial_debug_data(debug, &edge_port->port->dev,
1756                                         __func__, urb->actual_length, data);
1757                 if (edge_port->close_pending)
1758                         dbg("%s - close pending, dropping data on the floor",
1759                                                                 __func__);
1760                 else
1761                         edge_tty_recv(&edge_port->port->dev, tty, data,
1762                                                         urb->actual_length);
1763                 edge_port->icount.rx += urb->actual_length;
1764         }
1765
1766 exit:
1767         /* continue read unless stopped */
1768         spin_lock(&edge_port->ep_lock);
1769         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1770                 urb->dev = edge_port->port->serial->dev;
1771                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1772         } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1773                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1774         }
1775         spin_unlock(&edge_port->ep_lock);
1776         if (retval)
1777                 dev_err(&urb->dev->dev,
1778                         "%s - usb_submit_urb failed with result %d\n",
1779                          __func__, retval);
1780 }
1781
1782 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1783                                         unsigned char *data, int length)
1784 {
1785         int queued;
1786
1787         tty_buffer_request_room(tty, length);
1788         queued = tty_insert_flip_string(tty, data, length);
1789         if (queued < length)
1790                 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1791                         __func__, length - queued);
1792         tty_flip_buffer_push(tty);
1793 }
1794
1795 static void edge_bulk_out_callback(struct urb *urb)
1796 {
1797         struct usb_serial_port *port = urb->context;
1798         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1799         int status = urb->status;
1800
1801         dbg("%s - port %d", __func__, port->number);
1802
1803         edge_port->ep_write_urb_in_use = 0;
1804
1805         switch (status) {
1806         case 0:
1807                 /* success */
1808                 break;
1809         case -ECONNRESET:
1810         case -ENOENT:
1811         case -ESHUTDOWN:
1812                 /* this urb is terminated, clean up */
1813                 dbg("%s - urb shutting down with status: %d",
1814                     __func__, status);
1815                 return;
1816         default:
1817                 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1818                         "received: %d\n", __func__, status);
1819         }
1820
1821         /* send any buffered data */
1822         edge_send(port);
1823 }
1824
1825 static int edge_open(struct usb_serial_port *port, struct file *filp)
1826 {
1827         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1828         struct edgeport_serial *edge_serial;
1829         struct usb_device *dev;
1830         struct urb *urb;
1831         int port_number;
1832         int status;
1833         u16 open_settings;
1834         u8 transaction_timeout;
1835
1836         dbg("%s - port %d", __func__, port->number);
1837
1838         if (edge_port == NULL)
1839                 return -ENODEV;
1840
1841         port->tty->low_latency = low_latency;
1842
1843         port_number = port->number - port->serial->minor;
1844         switch (port_number) {
1845         case 0:
1846                 edge_port->uart_base = UMPMEM_BASE_UART1;
1847                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1848                 break;
1849         case 1:
1850                 edge_port->uart_base = UMPMEM_BASE_UART2;
1851                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1852                 break;
1853         default:
1854                 dev_err(&port->dev, "Unknown port number!!!\n");
1855                 return -ENODEV;
1856         }
1857
1858         dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1859                                 __func__, port_number, edge_port->uart_base,
1860                                 edge_port->dma_address);
1861
1862         dev = port->serial->dev;
1863
1864         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1865         init_waitqueue_head(&edge_port->delta_msr_wait);
1866
1867         /* turn off loopback */
1868         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1869         if (status) {
1870                 dev_err(&port->dev,
1871                                 "%s - cannot send clear loopback command, %d\n",
1872                         __func__, status);
1873                 return status;
1874         }
1875
1876         /* set up the port settings */
1877         edge_set_termios(port, port->tty->termios);
1878
1879         /* open up the port */
1880
1881         /* milliseconds to timeout for DMA transfer */
1882         transaction_timeout = 2;
1883
1884         edge_port->ump_read_timeout =
1885                                 max(20, ((transaction_timeout * 3) / 2));
1886
1887         /* milliseconds to timeout for DMA transfer */
1888         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1889                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1890                              (transaction_timeout << 2));
1891
1892         dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1893
1894         /* Tell TI to open and start the port */
1895         status = send_cmd(dev, UMPC_OPEN_PORT,
1896                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1897         if (status) {
1898                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1899                                                         __func__, status);
1900                 return status;
1901         }
1902
1903         /* Start the DMA? */
1904         status = send_cmd(dev, UMPC_START_PORT,
1905                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1906         if (status) {
1907                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1908                                                         __func__, status);
1909                 return status;
1910         }
1911
1912         /* Clear TX and RX buffers in UMP */
1913         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1914         if (status) {
1915                 dev_err(&port->dev,
1916                         "%s - cannot send clear buffers command, %d\n",
1917                         __func__, status);
1918                 return status;
1919         }
1920
1921         /* Read Initial MSR */
1922         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1923                                 (__u16)(UMPM_UART1_PORT + port_number),
1924                                 &edge_port->shadow_msr, 1);
1925         if (status) {
1926                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1927                                                         __func__, status);
1928                 return status;
1929         }
1930
1931         dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1932
1933         /* Set Initial MCR */
1934         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1935         dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1936
1937         edge_serial = edge_port->edge_serial;
1938         if (mutex_lock_interruptible(&edge_serial->es_lock))
1939                 return -ERESTARTSYS;
1940         if (edge_serial->num_ports_open == 0) {
1941                 /* we are the first port to open, post the interrupt urb */
1942                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1943                 if (!urb) {
1944                         dev_err(&port->dev,
1945                                 "%s - no interrupt urb present, exiting\n",
1946                                 __func__);
1947                         status = -EINVAL;
1948                         goto release_es_lock;
1949                 }
1950                 urb->complete = edge_interrupt_callback;
1951                 urb->context = edge_serial;
1952                 urb->dev = dev;
1953                 status = usb_submit_urb(urb, GFP_KERNEL);
1954                 if (status) {
1955                         dev_err(&port->dev,
1956                                 "%s - usb_submit_urb failed with value %d\n",
1957                                         __func__, status);
1958                         goto release_es_lock;
1959                 }
1960         }
1961
1962         /*
1963          * reset the data toggle on the bulk endpoints to work around bug in
1964          * host controllers where things get out of sync some times
1965          */
1966         usb_clear_halt(dev, port->write_urb->pipe);
1967         usb_clear_halt(dev, port->read_urb->pipe);
1968
1969         /* start up our bulk read urb */
1970         urb = port->read_urb;
1971         if (!urb) {
1972                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1973                                                                 __func__);
1974                 status = -EINVAL;
1975                 goto unlink_int_urb;
1976         }
1977         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1978         urb->complete = edge_bulk_in_callback;
1979         urb->context = edge_port;
1980         urb->dev = dev;
1981         status = usb_submit_urb(urb, GFP_KERNEL);
1982         if (status) {
1983                 dev_err(&port->dev,
1984                         "%s - read bulk usb_submit_urb failed with value %d\n",
1985                                 __func__, status);
1986                 goto unlink_int_urb;
1987         }
1988
1989         ++edge_serial->num_ports_open;
1990
1991         dbg("%s - exited", __func__);
1992
1993         goto release_es_lock;
1994
1995 unlink_int_urb:
1996         if (edge_port->edge_serial->num_ports_open == 0)
1997                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1998 release_es_lock:
1999         mutex_unlock(&edge_serial->es_lock);
2000         return status;
2001 }
2002
2003 static void edge_close(struct usb_serial_port *port, struct file *filp)
2004 {
2005         struct edgeport_serial *edge_serial;
2006         struct edgeport_port *edge_port;
2007         int port_number;
2008         int status;
2009
2010         dbg("%s - port %d", __func__, port->number);
2011
2012         edge_serial = usb_get_serial_data(port->serial);
2013         edge_port = usb_get_serial_port_data(port);
2014         if (edge_serial == NULL || edge_port == NULL)
2015                 return;
2016
2017         /* The bulkreadcompletion routine will check
2018          * this flag and dump add read data */
2019         edge_port->close_pending = 1;
2020
2021         /* chase the port close and flush */
2022         chase_port(edge_port, (HZ * closing_wait) / 100, 1);
2023
2024         usb_kill_urb(port->read_urb);
2025         usb_kill_urb(port->write_urb);
2026         edge_port->ep_write_urb_in_use = 0;
2027
2028         /* assuming we can still talk to the device,
2029          * send a close port command to it */
2030         dbg("%s - send umpc_close_port", __func__);
2031         port_number = port->number - port->serial->minor;
2032         status = send_cmd(port->serial->dev,
2033                                      UMPC_CLOSE_PORT,
2034                                      (__u8)(UMPM_UART1_PORT + port_number),
2035                                      0,
2036                                      NULL,
2037                                      0);
2038         mutex_lock(&edge_serial->es_lock);
2039         --edge_port->edge_serial->num_ports_open;
2040         if (edge_port->edge_serial->num_ports_open <= 0) {
2041                 /* last port is now closed, let's shut down our interrupt urb */
2042                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2043                 edge_port->edge_serial->num_ports_open = 0;
2044         }
2045         mutex_unlock(&edge_serial->es_lock);
2046         edge_port->close_pending = 0;
2047
2048         dbg("%s - exited", __func__);
2049 }
2050
2051 static int edge_write(struct usb_serial_port *port, const unsigned char *data,
2052                                                                 int count)
2053 {
2054         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2055         unsigned long flags;
2056
2057         dbg("%s - port %d", __func__, port->number);
2058
2059         if (count == 0) {
2060                 dbg("%s - write request of 0 bytes", __func__);
2061                 return 0;
2062         }
2063
2064         if (edge_port == NULL)
2065                 return -ENODEV;
2066         if (edge_port->close_pending == 1)
2067                 return -ENODEV;
2068
2069         spin_lock_irqsave(&edge_port->ep_lock, flags);
2070         count = edge_buf_put(edge_port->ep_out_buf, data, count);
2071         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2072
2073         edge_send(port);
2074
2075         return count;
2076 }
2077
2078 static void edge_send(struct usb_serial_port *port)
2079 {
2080         int count, result;
2081         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2082         struct tty_struct *tty = port->tty;
2083         unsigned long flags;
2084
2085
2086         dbg("%s - port %d", __func__, port->number);
2087
2088         spin_lock_irqsave(&edge_port->ep_lock, flags);
2089
2090         if (edge_port->ep_write_urb_in_use) {
2091                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2092                 return;
2093         }
2094
2095         count = edge_buf_get(edge_port->ep_out_buf,
2096                                 port->write_urb->transfer_buffer,
2097                                 port->bulk_out_size);
2098
2099         if (count == 0) {
2100                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2101                 return;
2102         }
2103
2104         edge_port->ep_write_urb_in_use = 1;
2105
2106         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2107
2108         usb_serial_debug_data(debug, &port->dev, __func__, count,
2109                                 port->write_urb->transfer_buffer);
2110
2111         /* set up our urb */
2112         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
2113                            usb_sndbulkpipe(port->serial->dev,
2114                                             port->bulk_out_endpointAddress),
2115                            port->write_urb->transfer_buffer, count,
2116                            edge_bulk_out_callback,
2117                            port);
2118
2119         /* send the data out the bulk port */
2120         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2121         if (result) {
2122                 dev_err(&port->dev,
2123                         "%s - failed submitting write urb, error %d\n",
2124                                 __func__, result);
2125                 edge_port->ep_write_urb_in_use = 0;
2126                 /* TODO: reschedule edge_send */
2127         } else
2128                 edge_port->icount.tx += count;
2129
2130         /* wakeup any process waiting for writes to complete */
2131         /* there is now more room in the buffer for new writes */
2132         if (tty)
2133                 tty_wakeup(tty);
2134 }
2135
2136 static int edge_write_room(struct usb_serial_port *port)
2137 {
2138         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2139         int room = 0;
2140         unsigned long flags;
2141
2142         dbg("%s - port %d", __func__, port->number);
2143
2144         if (edge_port == NULL)
2145                 return 0;
2146         if (edge_port->close_pending == 1)
2147                 return 0;
2148
2149         spin_lock_irqsave(&edge_port->ep_lock, flags);
2150         room = edge_buf_space_avail(edge_port->ep_out_buf);
2151         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2152
2153         dbg("%s - returns %d", __func__, room);
2154         return room;
2155 }
2156
2157 static int edge_chars_in_buffer(struct usb_serial_port *port)
2158 {
2159         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2160         int chars = 0;
2161         unsigned long flags;
2162
2163         dbg("%s - port %d", __func__, port->number);
2164
2165         if (edge_port == NULL)
2166                 return 0;
2167         if (edge_port->close_pending == 1)
2168                 return 0;
2169
2170         spin_lock_irqsave(&edge_port->ep_lock, flags);
2171         chars = edge_buf_data_avail(edge_port->ep_out_buf);
2172         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2173
2174         dbg("%s - returns %d", __func__, chars);
2175         return chars;
2176 }
2177
2178 static void edge_throttle(struct usb_serial_port *port)
2179 {
2180         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2181         struct tty_struct *tty = port->tty;
2182         int status;
2183
2184         dbg("%s - port %d", __func__, port->number);
2185
2186         if (edge_port == NULL)
2187                 return;
2188
2189         /* if we are implementing XON/XOFF, send the stop character */
2190         if (I_IXOFF(tty)) {
2191                 unsigned char stop_char = STOP_CHAR(tty);
2192                 status = edge_write(port, &stop_char, 1);
2193                 if (status <= 0)
2194                         dev_err(&port->dev,
2195                                 "%s - failed to write stop character, %d\n",
2196                                                         __func__, status);
2197         }
2198
2199         /* if we are implementing RTS/CTS, stop reads */
2200         /* and the Edgeport will clear the RTS line */
2201         if (C_CRTSCTS(tty))
2202                 stop_read(edge_port);
2203
2204 }
2205
2206 static void edge_unthrottle(struct usb_serial_port *port)
2207 {
2208         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2209         struct tty_struct *tty = port->tty;
2210         int status;
2211
2212         dbg("%s - port %d", __func__, port->number);
2213
2214         if (edge_port == NULL)
2215                 return;
2216
2217         /* if we are implementing XON/XOFF, send the start character */
2218         if (I_IXOFF(tty)) {
2219                 unsigned char start_char = START_CHAR(tty);
2220                 status = edge_write(port, &start_char, 1);
2221                 if (status <= 0)
2222                         dev_err(&port->dev,
2223                                 "%s - failed to write start character, %d\n",
2224                                                         __func__, status);
2225         }
2226         /* if we are implementing RTS/CTS, restart reads */
2227         /* are the Edgeport will assert the RTS line */
2228         if (C_CRTSCTS(tty)) {
2229                 status = restart_read(edge_port);
2230                 if (status)
2231                         dev_err(&port->dev,
2232                                 "%s - read bulk usb_submit_urb failed: %d\n",
2233                                                         __func__, status);
2234         }
2235
2236 }
2237
2238 static void stop_read(struct edgeport_port *edge_port)
2239 {
2240         unsigned long flags;
2241
2242         spin_lock_irqsave(&edge_port->ep_lock, flags);
2243
2244         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2245                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2246         edge_port->shadow_mcr &= ~MCR_RTS;
2247
2248         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2249 }
2250
2251 static int restart_read(struct edgeport_port *edge_port)
2252 {
2253         struct urb *urb;
2254         int status = 0;
2255         unsigned long flags;
2256
2257         spin_lock_irqsave(&edge_port->ep_lock, flags);
2258
2259         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2260                 urb = edge_port->port->read_urb;
2261                 urb->complete = edge_bulk_in_callback;
2262                 urb->context = edge_port;
2263                 urb->dev = edge_port->port->serial->dev;
2264                 status = usb_submit_urb(urb, GFP_ATOMIC);
2265         }
2266         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2267         edge_port->shadow_mcr |= MCR_RTS;
2268
2269         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2270
2271         return status;
2272 }
2273
2274 static void change_port_settings(struct edgeport_port *edge_port,
2275                                                 struct ktermios *old_termios)
2276 {
2277         struct ump_uart_config *config;
2278         struct tty_struct *tty;
2279         int baud;
2280         unsigned cflag;
2281         int status;
2282         int port_number = edge_port->port->number -
2283                                         edge_port->port->serial->minor;
2284
2285         dbg("%s - port %d", __func__, edge_port->port->number);
2286
2287         tty = edge_port->port->tty;
2288
2289         config = kmalloc(sizeof(*config), GFP_KERNEL);
2290         if (!config) {
2291                 *tty->termios = *old_termios;
2292                 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2293                                                                 __func__);
2294                 return;
2295         }
2296
2297         cflag = tty->termios->c_cflag;
2298
2299         config->wFlags = 0;
2300
2301         /* These flags must be set */
2302         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2303         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2304         config->bUartMode = (__u8)(edge_port->bUartMode);
2305
2306         switch (cflag & CSIZE) {
2307         case CS5:
2308                     config->bDataBits = UMP_UART_CHAR5BITS;
2309                     dbg("%s - data bits = 5", __func__);
2310                     break;
2311         case CS6:
2312                     config->bDataBits = UMP_UART_CHAR6BITS;
2313                     dbg("%s - data bits = 6", __func__);
2314                     break;
2315         case CS7:
2316                     config->bDataBits = UMP_UART_CHAR7BITS;
2317                     dbg("%s - data bits = 7", __func__);
2318                     break;
2319         default:
2320         case CS8:
2321                     config->bDataBits = UMP_UART_CHAR8BITS;
2322                     dbg("%s - data bits = 8", __func__);
2323                             break;
2324         }
2325
2326         if (cflag & PARENB) {
2327                 if (cflag & PARODD) {
2328                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2329                         config->bParity = UMP_UART_ODDPARITY;
2330                         dbg("%s - parity = odd", __func__);
2331                 } else {
2332                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2333                         config->bParity = UMP_UART_EVENPARITY;
2334                         dbg("%s - parity = even", __func__);
2335                 }
2336         } else {
2337                 config->bParity = UMP_UART_NOPARITY;
2338                 dbg("%s - parity = none", __func__);
2339         }
2340
2341         if (cflag & CSTOPB) {
2342                 config->bStopBits = UMP_UART_STOPBIT2;
2343                 dbg("%s - stop bits = 2", __func__);
2344         } else {
2345                 config->bStopBits = UMP_UART_STOPBIT1;
2346                 dbg("%s - stop bits = 1", __func__);
2347         }
2348
2349         /* figure out the flow control settings */
2350         if (cflag & CRTSCTS) {
2351                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2352                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2353                 dbg("%s - RTS/CTS is enabled", __func__);
2354         } else {
2355                 dbg("%s - RTS/CTS is disabled", __func__);
2356                 tty->hw_stopped = 0;
2357                 restart_read(edge_port);
2358         }
2359
2360         /* if we are implementing XON/XOFF, set the start and stop
2361            character in the device */
2362         config->cXon  = START_CHAR(tty);
2363         config->cXoff = STOP_CHAR(tty);
2364
2365         /* if we are implementing INBOUND XON/XOFF */
2366         if (I_IXOFF(tty)) {
2367                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2368                 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2369                      __func__, config->cXon, config->cXoff);
2370         } else
2371                 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2372
2373         /* if we are implementing OUTBOUND XON/XOFF */
2374         if (I_IXON(tty)) {
2375                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2376                 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2377                      __func__, config->cXon, config->cXoff);
2378         } else
2379                 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2380
2381         tty->termios->c_cflag &= ~CMSPAR;
2382
2383         /* Round the baud rate */
2384         baud = tty_get_baud_rate(tty);
2385         if (!baud) {
2386                 /* pick a default, any default... */
2387                 baud = 9600;
2388         } else
2389                 tty_encode_baud_rate(tty, baud, baud);
2390
2391         edge_port->baud_rate = baud;
2392         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2393
2394         /* FIXME: Recompute actual baud from divisor here */
2395
2396         dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2397                                                         config->wBaudRate);
2398
2399         dbg("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
2400         dbg("wFlags:    0x%x", config->wFlags);
2401         dbg("bDataBits:   %d", config->bDataBits);
2402         dbg("bParity:     %d", config->bParity);
2403         dbg("bStopBits:   %d", config->bStopBits);
2404         dbg("cXon:        %d", config->cXon);
2405         dbg("cXoff:       %d", config->cXoff);
2406         dbg("bUartMode:   %d", config->bUartMode);
2407
2408         /* move the word values into big endian mode */
2409         cpu_to_be16s(&config->wFlags);
2410         cpu_to_be16s(&config->wBaudRate);
2411
2412         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2413                                 (__u8)(UMPM_UART1_PORT + port_number),
2414                                 0, (__u8 *)config, sizeof(*config));
2415         if (status)
2416                 dbg("%s - error %d when trying to write config to device",
2417                      __func__, status);
2418         kfree(config);
2419         return;
2420 }
2421
2422 static void edge_set_termios(struct usb_serial_port *port,
2423                                         struct ktermios *old_termios)
2424 {
2425         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2426         struct tty_struct *tty = port->tty;
2427
2428         dbg("%s - clfag %08x iflag %08x", __func__,
2429             tty->termios->c_cflag, tty->termios->c_iflag);
2430         dbg("%s - old clfag %08x old iflag %08x", __func__,
2431             old_termios->c_cflag, old_termios->c_iflag);
2432         dbg("%s - port %d", __func__, port->number);
2433
2434         if (edge_port == NULL)
2435                 return;
2436         /* change the port settings to the new ones specified */
2437         change_port_settings(edge_port, old_termios);
2438 }
2439
2440 static int edge_tiocmset(struct usb_serial_port *port, struct file *file,
2441                                         unsigned int set, unsigned int clear)
2442 {
2443         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2444         unsigned int mcr;
2445         unsigned long flags;
2446
2447         dbg("%s - port %d", __func__, port->number);
2448
2449         spin_lock_irqsave(&edge_port->ep_lock, flags);
2450         mcr = edge_port->shadow_mcr;
2451         if (set & TIOCM_RTS)
2452                 mcr |= MCR_RTS;
2453         if (set & TIOCM_DTR)
2454                 mcr |= MCR_DTR;
2455         if (set & TIOCM_LOOP)
2456                 mcr |= MCR_LOOPBACK;
2457
2458         if (clear & TIOCM_RTS)
2459                 mcr &= ~MCR_RTS;
2460         if (clear & TIOCM_DTR)
2461                 mcr &= ~MCR_DTR;
2462         if (clear & TIOCM_LOOP)
2463                 mcr &= ~MCR_LOOPBACK;
2464
2465         edge_port->shadow_mcr = mcr;
2466         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2467
2468         restore_mcr(edge_port, mcr);
2469         return 0;
2470 }
2471
2472 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
2473 {
2474         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2475         unsigned int result = 0;
2476         unsigned int msr;
2477         unsigned int mcr;
2478         unsigned long flags;
2479
2480         dbg("%s - port %d", __func__, port->number);
2481
2482         spin_lock_irqsave(&edge_port->ep_lock, flags);
2483
2484         msr = edge_port->shadow_msr;
2485         mcr = edge_port->shadow_mcr;
2486         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2487                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2488                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2489                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2490                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2491                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2492
2493
2494         dbg("%s -- %x", __func__, result);
2495         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2496
2497         return result;
2498 }
2499
2500 static int get_serial_info(struct edgeport_port *edge_port,
2501                                 struct serial_struct __user *retinfo)
2502 {
2503         struct serial_struct tmp;
2504
2505         if (!retinfo)
2506                 return -EFAULT;
2507
2508         memset(&tmp, 0, sizeof(tmp));
2509
2510         tmp.type                = PORT_16550A;
2511         tmp.line                = edge_port->port->serial->minor;
2512         tmp.port                = edge_port->port->number;
2513         tmp.irq                 = 0;
2514         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2515         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2516         tmp.baud_base           = 9600;
2517         tmp.close_delay         = 5*HZ;
2518         tmp.closing_wait        = closing_wait;
2519
2520         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2521                 return -EFAULT;
2522         return 0;
2523 }
2524
2525 static int edge_ioctl(struct usb_serial_port *port, struct file *file,
2526                                         unsigned int cmd, unsigned long arg)
2527 {
2528         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2529         struct async_icount cnow;
2530         struct async_icount cprev;
2531
2532         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2533
2534         switch (cmd) {
2535         case TIOCGSERIAL:
2536                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2537                 return get_serial_info(edge_port,
2538                                 (struct serial_struct __user *) arg);
2539         case TIOCMIWAIT:
2540                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2541                 cprev = edge_port->icount;
2542                 while (1) {
2543                         interruptible_sleep_on(&edge_port->delta_msr_wait);
2544                         /* see if a signal did it */
2545                         if (signal_pending(current))
2546                                 return -ERESTARTSYS;
2547                         cnow = edge_port->icount;
2548                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2549                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2550                                 return -EIO; /* no change => error */
2551                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2552                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2553                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2554                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2555                                 return 0;
2556                         }
2557                         cprev = cnow;
2558                 }
2559                 /* not reached */
2560                 break;
2561         case TIOCGICOUNT:
2562                 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2563                      port->number, edge_port->icount.rx, edge_port->icount.tx);
2564                 if (copy_to_user((void __user *)arg, &edge_port->icount,
2565                                 sizeof(edge_port->icount)))
2566                         return -EFAULT;
2567                 return 0;
2568         }
2569         return -ENOIOCTLCMD;
2570 }
2571
2572 static void edge_break(struct usb_serial_port *port, int on)
2573 {
2574         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2575         int status;
2576         int bv = 0;     /* Off */
2577
2578         dbg("%s - state = %d", __func__, on);
2579
2580         /* chase the port close */
2581         chase_port(edge_port, 0, 0);
2582
2583         if (on == -1)
2584                 bv = 1; /* On */
2585         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2586         if (status)
2587                 dbg("%s - error %d sending break set/clear command.",
2588                      __func__, status);
2589 }
2590
2591 static int edge_startup(struct usb_serial *serial)
2592 {
2593         struct edgeport_serial *edge_serial;
2594         struct edgeport_port *edge_port;
2595         struct usb_device *dev;
2596         int status;
2597         int i;
2598
2599         dev = serial->dev;
2600
2601         /* create our private serial structure */
2602         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2603         if (edge_serial == NULL) {
2604                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2605                 return -ENOMEM;
2606         }
2607         mutex_init(&edge_serial->es_lock);
2608         edge_serial->serial = serial;
2609         usb_set_serial_data(serial, edge_serial);
2610
2611         status = download_fw(edge_serial);
2612         if (status) {
2613                 kfree(edge_serial);
2614                 return status;
2615         }
2616
2617         /* set up our port private structures */
2618         for (i = 0; i < serial->num_ports; ++i) {
2619                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2620                 if (edge_port == NULL) {
2621                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2622                                                                 __func__);
2623                         goto cleanup;
2624                 }
2625                 spin_lock_init(&edge_port->ep_lock);
2626                 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
2627                 if (edge_port->ep_out_buf == NULL) {
2628                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2629                                                                 __func__);
2630                         kfree(edge_port);
2631                         goto cleanup;
2632                 }
2633                 edge_port->port = serial->port[i];
2634                 edge_port->edge_serial = edge_serial;
2635                 usb_set_serial_port_data(serial->port[i], edge_port);
2636                 edge_port->bUartMode = default_uart_mode;
2637         }
2638
2639         return 0;
2640
2641 cleanup:
2642         for (--i; i >= 0; --i) {
2643                 edge_port = usb_get_serial_port_data(serial->port[i]);
2644                 edge_buf_free(edge_port->ep_out_buf);
2645                 kfree(edge_port);
2646                 usb_set_serial_port_data(serial->port[i], NULL);
2647         }
2648         kfree(edge_serial);
2649         usb_set_serial_data(serial, NULL);
2650         return -ENOMEM;
2651 }
2652
2653 static void edge_shutdown(struct usb_serial *serial)
2654 {
2655         int i;
2656         struct edgeport_port *edge_port;
2657
2658         dbg("%s", __func__);
2659
2660         for (i = 0; i < serial->num_ports; ++i) {
2661                 edge_port = usb_get_serial_port_data(serial->port[i]);
2662                 edge_remove_sysfs_attrs(edge_port->port);
2663                 edge_buf_free(edge_port->ep_out_buf);
2664                 kfree(edge_port);
2665                 usb_set_serial_port_data(serial->port[i], NULL);
2666         }
2667         kfree(usb_get_serial_data(serial));
2668         usb_set_serial_data(serial, NULL);
2669 }
2670
2671
2672 /* Sysfs Attributes */
2673
2674 static ssize_t show_uart_mode(struct device *dev,
2675         struct device_attribute *attr, char *buf)
2676 {
2677         struct usb_serial_port *port = to_usb_serial_port(dev);
2678         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2679
2680         return sprintf(buf, "%d\n", edge_port->bUartMode);
2681 }
2682
2683 static ssize_t store_uart_mode(struct device *dev,
2684         struct device_attribute *attr, const char *valbuf, size_t count)
2685 {
2686         struct usb_serial_port *port = to_usb_serial_port(dev);
2687         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2688         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2689
2690         dbg("%s: setting uart_mode = %d", __func__, v);
2691
2692         if (v < 256)
2693                 edge_port->bUartMode = v;
2694         else
2695                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2696
2697         return count;
2698 }
2699
2700 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2701                                                         store_uart_mode);
2702
2703 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2704 {
2705         return device_create_file(&port->dev, &dev_attr_uart_mode);
2706 }
2707
2708 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2709 {
2710         device_remove_file(&port->dev, &dev_attr_uart_mode);
2711         return 0;
2712 }
2713
2714
2715 /* Circular Buffer */
2716
2717 /*
2718  * edge_buf_alloc
2719  *
2720  * Allocate a circular buffer and all associated memory.
2721  */
2722
2723 static struct edge_buf *edge_buf_alloc(unsigned int size)
2724 {
2725         struct edge_buf *eb;
2726
2727
2728         if (size == 0)
2729                 return NULL;
2730
2731         eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
2732         if (eb == NULL)
2733                 return NULL;
2734
2735         eb->buf_buf = kmalloc(size, GFP_KERNEL);
2736         if (eb->buf_buf == NULL) {
2737                 kfree(eb);
2738                 return NULL;
2739         }
2740
2741         eb->buf_size = size;
2742         eb->buf_get = eb->buf_put = eb->buf_buf;
2743
2744         return eb;
2745 }
2746
2747
2748 /*
2749  * edge_buf_free
2750  *
2751  * Free the buffer and all associated memory.
2752  */
2753
2754 static void edge_buf_free(struct edge_buf *eb)
2755 {
2756         if (eb) {
2757                 kfree(eb->buf_buf);
2758                 kfree(eb);
2759         }
2760 }
2761
2762
2763 /*
2764  * edge_buf_clear
2765  *
2766  * Clear out all data in the circular buffer.
2767  */
2768
2769 static void edge_buf_clear(struct edge_buf *eb)
2770 {
2771         if (eb != NULL)
2772                 eb->buf_get = eb->buf_put;
2773         /* equivalent to a get of all data available */
2774 }
2775
2776
2777 /*
2778  * edge_buf_data_avail
2779  *
2780  * Return the number of bytes of data available in the circular
2781  * buffer.
2782  */
2783
2784 static unsigned int edge_buf_data_avail(struct edge_buf *eb)
2785 {
2786         if (eb == NULL)
2787                 return 0;
2788         return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
2789 }
2790
2791
2792 /*
2793  * edge_buf_space_avail
2794  *
2795  * Return the number of bytes of space available in the circular
2796  * buffer.
2797  */
2798
2799 static unsigned int edge_buf_space_avail(struct edge_buf *eb)
2800 {
2801         if (eb == NULL)
2802                 return 0;
2803         return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
2804 }
2805
2806
2807 /*
2808  * edge_buf_put
2809  *
2810  * Copy data data from a user buffer and put it into the circular buffer.
2811  * Restrict to the amount of space available.
2812  *
2813  * Return the number of bytes copied.
2814  */
2815
2816 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
2817         unsigned int count)
2818 {
2819         unsigned int len;
2820
2821
2822         if (eb == NULL)
2823                 return 0;
2824
2825         len  = edge_buf_space_avail(eb);
2826         if (count > len)
2827                 count = len;
2828
2829         if (count == 0)
2830                 return 0;
2831
2832         len = eb->buf_buf + eb->buf_size - eb->buf_put;
2833         if (count > len) {
2834                 memcpy(eb->buf_put, buf, len);
2835                 memcpy(eb->buf_buf, buf+len, count - len);
2836                 eb->buf_put = eb->buf_buf + count - len;
2837         } else {
2838                 memcpy(eb->buf_put, buf, count);
2839                 if (count < len)
2840                         eb->buf_put += count;
2841                 else /* count == len */
2842                         eb->buf_put = eb->buf_buf;
2843         }
2844
2845         return count;
2846 }
2847
2848
2849 /*
2850  * edge_buf_get
2851  *
2852  * Get data from the circular buffer and copy to the given buffer.
2853  * Restrict to the amount of data available.
2854  *
2855  * Return the number of bytes copied.
2856  */
2857
2858 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
2859         unsigned int count)
2860 {
2861         unsigned int len;
2862
2863
2864         if (eb == NULL)
2865                 return 0;
2866
2867         len = edge_buf_data_avail(eb);
2868         if (count > len)
2869                 count = len;
2870
2871         if (count == 0)
2872                 return 0;
2873
2874         len = eb->buf_buf + eb->buf_size - eb->buf_get;
2875         if (count > len) {
2876                 memcpy(buf, eb->buf_get, len);
2877                 memcpy(buf+len, eb->buf_buf, count - len);
2878                 eb->buf_get = eb->buf_buf + count - len;
2879         } else {
2880                 memcpy(buf, eb->buf_get, count);
2881                 if (count < len)
2882                         eb->buf_get += count;
2883                 else /* count == len */
2884                         eb->buf_get = eb->buf_buf;
2885         }
2886
2887         return count;
2888 }
2889
2890
2891 static struct usb_serial_driver edgeport_1port_device = {
2892         .driver = {
2893                 .owner          = THIS_MODULE,
2894                 .name           = "edgeport_ti_1",
2895         },
2896         .description            = "Edgeport TI 1 port adapter",
2897         .usb_driver             = &io_driver,
2898         .id_table               = edgeport_1port_id_table,
2899         .num_ports              = 1,
2900         .open                   = edge_open,
2901         .close                  = edge_close,
2902         .throttle               = edge_throttle,
2903         .unthrottle             = edge_unthrottle,
2904         .attach                 = edge_startup,
2905         .shutdown               = edge_shutdown,
2906         .port_probe             = edge_create_sysfs_attrs,
2907         .ioctl                  = edge_ioctl,
2908         .set_termios            = edge_set_termios,
2909         .tiocmget               = edge_tiocmget,
2910         .tiocmset               = edge_tiocmset,
2911         .write                  = edge_write,
2912         .write_room             = edge_write_room,
2913         .chars_in_buffer        = edge_chars_in_buffer,
2914         .break_ctl              = edge_break,
2915         .read_int_callback      = edge_interrupt_callback,
2916         .read_bulk_callback     = edge_bulk_in_callback,
2917         .write_bulk_callback    = edge_bulk_out_callback,
2918 };
2919
2920 static struct usb_serial_driver edgeport_2port_device = {
2921         .driver = {
2922                 .owner          = THIS_MODULE,
2923                 .name           = "edgeport_ti_2",
2924         },
2925         .description            = "Edgeport TI 2 port adapter",
2926         .usb_driver             = &io_driver,
2927         .id_table               = edgeport_2port_id_table,
2928         .num_ports              = 2,
2929         .open                   = edge_open,
2930         .close                  = edge_close,
2931         .throttle               = edge_throttle,
2932         .unthrottle             = edge_unthrottle,
2933         .attach                 = edge_startup,
2934         .shutdown               = edge_shutdown,
2935         .port_probe             = edge_create_sysfs_attrs,
2936         .ioctl                  = edge_ioctl,
2937         .set_termios            = edge_set_termios,
2938         .tiocmget               = edge_tiocmget,
2939         .tiocmset               = edge_tiocmset,
2940         .write                  = edge_write,
2941         .write_room             = edge_write_room,
2942         .chars_in_buffer        = edge_chars_in_buffer,
2943         .break_ctl              = edge_break,
2944         .read_int_callback      = edge_interrupt_callback,
2945         .read_bulk_callback     = edge_bulk_in_callback,
2946         .write_bulk_callback    = edge_bulk_out_callback,
2947 };
2948
2949
2950 static int __init edgeport_init(void)
2951 {
2952         int retval;
2953         retval = usb_serial_register(&edgeport_1port_device);
2954         if (retval)
2955                 goto failed_1port_device_register;
2956         retval = usb_serial_register(&edgeport_2port_device);
2957         if (retval)
2958                 goto failed_2port_device_register;
2959         retval = usb_register(&io_driver);
2960         if (retval)
2961                 goto failed_usb_register;
2962         info(DRIVER_DESC " " DRIVER_VERSION);
2963         return 0;
2964 failed_usb_register:
2965         usb_serial_deregister(&edgeport_2port_device);
2966 failed_2port_device_register:
2967         usb_serial_deregister(&edgeport_1port_device);
2968 failed_1port_device_register:
2969         return retval;
2970 }
2971
2972 static void __exit edgeport_exit(void)
2973 {
2974         usb_deregister(&io_driver);
2975         usb_serial_deregister(&edgeport_1port_device);
2976         usb_serial_deregister(&edgeport_2port_device);
2977 }
2978
2979 module_init(edgeport_init);
2980 module_exit(edgeport_exit);
2981
2982 /* Module information */
2983 MODULE_AUTHOR(DRIVER_AUTHOR);
2984 MODULE_DESCRIPTION(DRIVER_DESC);
2985 MODULE_LICENSE("GPL");
2986 MODULE_FIRMWARE("edgeport/down3.bin");
2987
2988 module_param(debug, bool, S_IRUGO | S_IWUSR);
2989 MODULE_PARM_DESC(debug, "Debug enabled or not");
2990
2991 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
2992 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
2993
2994 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2995 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2996
2997 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2998 MODULE_PARM_DESC(ignore_cpu_rev,
2999                         "Ignore the cpu revision when connecting to a device");
3000
3001 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
3002 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");