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 tty_struct *tty,
 247                 struct usb_serial_port *port, struct ktermios *old_termios);
 248 static void edge_send(struct tty_struct *tty);
 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 = tty_port_tty_get(&port->port->port);
 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         tty_kref_put(tty);
 603
 604         /* wait for data to drain from the device */
 605         timeout += jiffies;
 606         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
 607         && usb_get_intfdata(port->port->serial->interface)) {
 608                 /* not disconnected */
 609                 if (!tx_active(port))
 610                         break;
 611                 msleep(10);
 612         }
 613
 614         /* disconnected */
 615         if (!usb_get_intfdata(port->port->serial->interface))
 616                 return;
 617
 618         /* wait one more character time, based on baud rate */
 619         /* (tx_active doesn't seem to wait for the last byte) */
 620         baud_rate = port->baud_rate;
 621         if (baud_rate == 0)
 622                 baud_rate = 50;
 623         msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
 624 }
 625
 626 static int choose_config(struct usb_device *dev)
 627 {
 628         /*
 629          * There may be multiple configurations on this device, in which case
 630          * we would need to read and parse all of them to find out which one
 631          * we want. However, we just support one config at this point,
 632          * configuration # 1, which is Config Descriptor 0.
 633          */
 634
 635         dbg("%s - Number of Interfaces = %d",
 636                                 __func__, dev->config->desc.bNumInterfaces);
 637         dbg("%s - MAX Power            = %d",
 638                                 __func__, dev->config->desc.bMaxPower * 2);
 639
 640         if (dev->config->desc.bNumInterfaces != 1) {
 641                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
 642                                                                 __func__);
 643                 return -ENODEV;
 644         }
 645
 646         return 0;
 647 }
 648
 649 static int read_rom(struct edgeport_serial *serial,
 650                                 int start_address, int length, __u8 *buffer)
 651 {
 652         int status;
 653
 654         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 655                 status = read_download_mem(serial->serial->dev,
 656                                                start_address,
 657                                                length,
 658                                                serial->TI_I2C_Type,
 659                                                buffer);
 660         } else {
 661                 status = read_boot_mem(serial, start_address, length,
 662                                                                 buffer);
 663         }
 664         return status;
 665 }
 666
 667 static int write_rom(struct edgeport_serial *serial, int start_address,
 668                                                 int length, __u8 *buffer)
 669 {
 670         if (serial->product_info.TiMode == TI_MODE_BOOT)
 671                 return write_boot_mem(serial, start_address, length,
 672                                                                 buffer);
 673
 674         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 675                 return write_i2c_mem(serial, start_address, length,
 676                                                 serial->TI_I2C_Type, buffer);
 677         return -EINVAL;
 678 }
 679
 680
 681
 682 /* Read a descriptor header from I2C based on type */
 683 static int get_descriptor_addr(struct edgeport_serial *serial,
 684                                 int desc_type, struct ti_i2c_desc *rom_desc)
 685 {
 686         int start_address;
 687         int status;
 688
 689         /* Search for requested descriptor in I2C */
 690         start_address = 2;
 691         do {
 692                 status = read_rom(serial,
 693                                    start_address,
 694                                    sizeof(struct ti_i2c_desc),
 695                                    (__u8 *)rom_desc);
 696                 if (status)
 697                         return 0;
 698
 699                 if (rom_desc->Type == desc_type)
 700                         return start_address;
 701
 702                 start_address = start_address + sizeof(struct ti_i2c_desc)
 703                                                         + rom_desc->Size;
 704
 705         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 706
 707         return 0;
 708 }
 709
 710 /* Validate descriptor checksum */
 711 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 712 {
 713         __u16 i;
 714         __u8 cs = 0;
 715
 716         for (i = 0; i < rom_desc->Size; i++)
 717                 cs = (__u8)(cs + buffer[i]);
 718
 719         if (cs != rom_desc->CheckSum) {
 720                 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 721                 return -EINVAL;
 722         }
 723         return 0;
 724 }
 725
 726 /* Make sure that the I2C image is good */
 727 static int check_i2c_image(struct edgeport_serial *serial)
 728 {
 729         struct device *dev = &serial->serial->dev->dev;
 730         int status = 0;
 731         struct ti_i2c_desc *rom_desc;
 732         int start_address = 2;
 733         __u8 *buffer;
 734         __u16 ttype;
 735
 736         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 737         if (!rom_desc) {
 738                 dev_err(dev, "%s - out of memory\n", __func__);
 739                 return -ENOMEM;
 740         }
 741         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 742         if (!buffer) {
 743                 dev_err(dev, "%s - out of memory when allocating buffer\n",
 744                                                                 __func__);
 745                 kfree(rom_desc);
 746                 return -ENOMEM;
 747         }
 748
 749         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 750         status = read_rom(serial, 0, 1, buffer);
 751         if (status)
 752                 goto out;
 753
 754         if (*buffer != UMP5152 && *buffer != UMP3410) {
 755                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 756                 status = -ENODEV;
 757                 goto out;
 758         }
 759
 760         do {
 761                 /* Validate the I2C */
 762                 status = read_rom(serial,
 763                                 start_address,
 764                                 sizeof(struct ti_i2c_desc),
 765                                 (__u8 *)rom_desc);
 766                 if (status)
 767                         break;
 768
 769                 if ((start_address + sizeof(struct ti_i2c_desc) +
 770                                         rom_desc->Size) > TI_MAX_I2C_SIZE) {
 771                         status = -ENODEV;
 772                         dbg("%s - structure too big, erroring out.", __func__);
 773                         break;
 774                 }
 775
 776                 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
 777
 778                 /* Skip type 2 record */
 779                 ttype = rom_desc->Type & 0x0f;
 780                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 781                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 782                         /* Read the descriptor data */
 783                         status = read_rom(serial, start_address +
 784                                                 sizeof(struct ti_i2c_desc),
 785                                                 rom_desc->Size, buffer);
 786                         if (status)
 787                                 break;
 788
 789                         status = valid_csum(rom_desc, buffer);
 790                         if (status)
 791                                 break;
 792                 }
 793                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 794                                                                 rom_desc->Size;
 795
 796         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 797                                 (start_address < TI_MAX_I2C_SIZE));
 798
 799         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 800                                 (start_address > TI_MAX_I2C_SIZE))
 801                 status = -ENODEV;
 802
 803 out:
 804         kfree(buffer);
 805         kfree(rom_desc);
 806         return status;
 807 }
 808
 809 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
 810 {
 811         int status;
 812         int start_address;
 813         struct ti_i2c_desc *rom_desc;
 814         struct edge_ti_manuf_descriptor *desc;
 815
 816         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 817         if (!rom_desc) {
 818                 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
 819                                                                 __func__);
 820                 return -ENOMEM;
 821         }
 822         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 823                                                                 rom_desc);
 824
 825         if (!start_address) {
 826                 dbg("%s - Edge Descriptor not found in I2C", __func__);
 827                 status = -ENODEV;
 828                 goto exit;
 829         }
 830
 831         /* Read the descriptor data */
 832         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 833                                                 rom_desc->Size, buffer);
 834         if (status)
 835                 goto exit;
 836
 837         status = valid_csum(rom_desc, buffer);
 838
 839         desc = (struct edge_ti_manuf_descriptor *)buffer;
 840         dbg("%s - IonConfig      0x%x", __func__, desc->IonConfig);
 841         dbg("%s - Version          %d", __func__, desc->Version);
 842         dbg("%s - Cpu/Board      0x%x", __func__, desc->CpuRev_BoardRev);
 843         dbg("%s - NumPorts         %d", __func__, desc->NumPorts);
 844         dbg("%s - NumVirtualPorts  %d", __func__, desc->NumVirtualPorts);
 845         dbg("%s - TotalPorts       %d", __func__, desc->TotalPorts);
 846
 847 exit:
 848         kfree(rom_desc);
 849         return status;
 850 }
 851
 852 /* Build firmware header used for firmware update */
 853 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
 854 {
 855         __u8 *buffer;
 856         int buffer_size;
 857         int i;
 858         int err;
 859         __u8 cs = 0;
 860         struct ti_i2c_desc *i2c_header;
 861         struct ti_i2c_image_header *img_header;
 862         struct ti_i2c_firmware_rec *firmware_rec;
 863         const struct firmware *fw;
 864         const char *fw_name = "edgeport/down3.bin";
 865
 866         /* In order to update the I2C firmware we must change the type 2 record
 867          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 868          * Then while in boot mode, the driver will download the latest
 869          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 870          * device comes back up in download mode the driver will cause the new
 871          * firmware to be copied from the UMP Ram to I2C and the firmware will
 872          * update the record type from 0xf2 to 0x02.
 873          */
 874
 875         /* Allocate a 15.5k buffer + 2 bytes for version number
 876          * (Firmware Record) */
 877         buffer_size = (((1024 * 16) - 512 ) +
 878                         sizeof(struct ti_i2c_firmware_rec));
 879
 880         buffer = kmalloc(buffer_size, GFP_KERNEL);
 881         if (!buffer) {
 882                 dev_err(dev, "%s - out of memory\n", __func__);
 883                 return -ENOMEM;
 884         }
 885
 886         // Set entire image of 0xffs
 887         memset(buffer, 0xff, buffer_size);
 888
 889         err = request_firmware(&fw, fw_name, dev);
 890         if (err) {
 891                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 892                        fw_name, err);
 893                 kfree(buffer);
 894                 return err;
 895         }
 896
 897         /* Save Download Version Number */
 898         OperationalMajorVersion = fw->data[0];
 899         OperationalMinorVersion = fw->data[1];
 900         OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
 901
 902         /* Copy version number into firmware record */
 903         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 904
 905         firmware_rec->Ver_Major = OperationalMajorVersion;
 906         firmware_rec->Ver_Minor = OperationalMinorVersion;
 907
 908         /* Pointer to fw_down memory image */
 909         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 910
 911         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 912                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 913                 le16_to_cpu(img_header->Length));
 914
 915         release_firmware(fw);
 916
 917         for (i=0; i < buffer_size; i++) {
 918                 cs = (__u8)(cs + buffer[i]);
 919         }
 920
 921         kfree(buffer);
 922
 923         /* Build new header */
 924         i2c_header =  (struct ti_i2c_desc *)header;
 925         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 926
 927         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 928         i2c_header->Size        = (__u16)buffer_size;
 929         i2c_header->CheckSum    = cs;
 930         firmware_rec->Ver_Major = OperationalMajorVersion;
 931         firmware_rec->Ver_Minor = OperationalMinorVersion;
 932
 933         return 0;
 934 }
 935
 936 /* Try to figure out what type of I2c we have */
 937 static int i2c_type_bootmode(struct edgeport_serial *serial)
 938 {
 939         int status;
 940         __u8 data;
 941
 942         /* Try to read type 2 */
 943         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 944                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01);
 945         if (status)
 946                 dbg("%s - read 2 status error = %d", __func__, status);
 947         else
 948                 dbg("%s - read 2 data = 0x%x", __func__, data);
 949         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 950                 dbg("%s - ROM_TYPE_II", __func__);
 951                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 952                 return 0;
 953         }
 954
 955         /* Try to read type 3 */
 956         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 957                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01);
 958         if (status)
 959                 dbg("%s - read 3 status error = %d", __func__, status);
 960         else
 961                 dbg("%s - read 2 data = 0x%x", __func__, data);
 962         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 963                 dbg("%s - ROM_TYPE_III", __func__);
 964                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 965                 return 0;
 966         }
 967
 968         dbg("%s - Unknown", __func__);
 969         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 970         return -ENODEV;
 971 }
 972
 973 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 974                                                 int length, int *num_sent)
 975 {
 976         int status;
 977
 978         status = usb_bulk_msg(serial->dev,
 979                         usb_sndbulkpipe(serial->dev,
 980                                 serial->port[0]->bulk_out_endpointAddress),
 981                         buffer, length, num_sent, 1000);
 982         return status;
 983 }
 984
 985 /* Download given firmware image to the device (IN BOOT MODE) */
 986 static int download_code(struct edgeport_serial *serial, __u8 *image,
 987                                                         int image_length)
 988 {
 989         int status = 0;
 990         int pos;
 991         int transfer;
 992         int done;
 993
 994         /* Transfer firmware image */
 995         for (pos = 0; pos < image_length; ) {
 996                 /* Read the next buffer from file */
 997                 transfer = image_length - pos;
 998                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 999                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
1000
1001                 /* Transfer data */
1002                 status = bulk_xfer(serial->serial, &image[pos],
1003                                                         transfer, &done);
1004                 if (status)
1005                         break;
1006                 /* Advance buffer pointer */
1007                 pos += done;
1008         }
1009
1010         return status;
1011 }
1012
1013 /* FIXME!!! */
1014 static int config_boot_dev(struct usb_device *dev)
1015 {
1016         return 0;
1017 }
1018
1019 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
1020 {
1021         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
1022 }
1023
1024 /**
1025  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1026  *
1027  * This routine downloads the main operating code into the TI5052, using the
1028  * boot code already burned into E2PROM or ROM.
1029  */
1030 static int download_fw(struct edgeport_serial *serial)
1031 {
1032         struct device *dev = &serial->serial->dev->dev;
1033         int status = 0;
1034         int start_address;
1035         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1036         struct usb_interface_descriptor *interface;
1037         int download_cur_ver;
1038         int download_new_ver;
1039
1040         /* This routine is entered by both the BOOT mode and the Download mode
1041          * We can determine which code is running by the reading the config
1042          * descriptor and if we have only one bulk pipe it is in boot mode
1043          */
1044         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1045
1046         /* Default to type 2 i2c */
1047         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1048
1049         status = choose_config(serial->serial->dev);
1050         if (status)
1051                 return status;
1052
1053         interface = &serial->serial->interface->cur_altsetting->desc;
1054         if (!interface) {
1055                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1056                 return -ENODEV;
1057         }
1058
1059         /*
1060          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1061          * if we have more than one endpoint we are definitely in download
1062          * mode
1063          */
1064         if (interface->bNumEndpoints > 1)
1065                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1066         else
1067                 /* Otherwise we will remain in configuring mode */
1068                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1069
1070         /********************************************************************/
1071         /* Download Mode */
1072         /********************************************************************/
1073         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1074                 struct ti_i2c_desc *rom_desc;
1075
1076                 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1077
1078                 status = check_i2c_image(serial);
1079                 if (status) {
1080                         dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1081                         return status;
1082                 }
1083
1084                 /* Validate Hardware version number
1085                  * Read Manufacturing Descriptor from TI Based Edgeport
1086                  */
1087                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1088                 if (!ti_manuf_desc) {
1089                         dev_err(dev, "%s - out of memory.\n", __func__);
1090                         return -ENOMEM;
1091                 }
1092                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1093                 if (status) {
1094                         kfree(ti_manuf_desc);
1095                         return status;
1096                 }
1097
1098                 /* Check version number of ION descriptor */
1099                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1100                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1101                                 __func__, ti_cpu_rev(ti_manuf_desc));
1102                         kfree(ti_manuf_desc);
1103                         return -EINVAL;
1104                 }
1105
1106                 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1107                 if (!rom_desc) {
1108                         dev_err(dev, "%s - out of memory.\n", __func__);
1109                         kfree(ti_manuf_desc);
1110                         return -ENOMEM;
1111                 }
1112
1113                 /* Search for type 2 record (firmware record) */
1114                 start_address = get_descriptor_addr(serial,
1115                                 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1116                 if (start_address != 0) {
1117                         struct ti_i2c_firmware_rec *firmware_version;
1118                         __u8 record;
1119
1120                         dbg("%s - Found Type FIRMWARE (Type 2) record",
1121                                                                 __func__);
1122
1123                         firmware_version = kmalloc(sizeof(*firmware_version),
1124                                                                 GFP_KERNEL);
1125                         if (!firmware_version) {
1126                                 dev_err(dev, "%s - out of memory.\n", __func__);
1127                                 kfree(rom_desc);
1128                                 kfree(ti_manuf_desc);
1129                                 return -ENOMEM;
1130                         }
1131
1132                         /* Validate version number
1133                          * Read the descriptor data
1134                          */
1135                         status = read_rom(serial, start_address +
1136                                         sizeof(struct ti_i2c_desc),
1137                                         sizeof(struct ti_i2c_firmware_rec),
1138                                         (__u8 *)firmware_version);
1139                         if (status) {
1140                                 kfree(firmware_version);
1141                                 kfree(rom_desc);
1142                                 kfree(ti_manuf_desc);
1143                                 return status;
1144                         }
1145
1146                         /* Check version number of download with current
1147                            version in I2c */
1148                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1149                                            (firmware_version->Ver_Minor);
1150                         download_new_ver = (OperationalMajorVersion << 8) +
1151                                            (OperationalMinorVersion);
1152
1153                         dbg("%s - >> FW Versions Device %d.%d  Driver %d.%d",
1154                             __func__,
1155                             firmware_version->Ver_Major,
1156                             firmware_version->Ver_Minor,
1157                             OperationalMajorVersion,
1158                             OperationalMinorVersion);
1159
1160                         /* Check if we have an old version in the I2C and
1161                            update if necessary */
1162                         if (download_cur_ver != download_new_ver) {
1163                                 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1164                                     __func__,
1165                                     firmware_version->Ver_Major,
1166                                     firmware_version->Ver_Minor,
1167                                     OperationalMajorVersion,
1168                                     OperationalMinorVersion);
1169
1170                                 /* In order to update the I2C firmware we must
1171                                  * change the type 2 record to type 0xF2. This
1172                                  * will force the UMP to come up in Boot Mode.
1173                                  * Then while in boot mode, the driver will
1174                                  * download the latest firmware (padded to
1175                                  * 15.5k) into the UMP ram. Finally when the
1176                                  * device comes back up in download mode the
1177                                  * driver will cause the new firmware to be
1178                                  * copied from the UMP Ram to I2C and the
1179                                  * firmware will update the record type from
1180                                  * 0xf2 to 0x02.
1181                                  */
1182                                 record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1183
1184                                 /* Change the I2C Firmware record type to
1185                                    0xf2 to trigger an update */
1186                                 status = write_rom(serial, start_address,
1187                                                 sizeof(record), &record);
1188                                 if (status) {
1189                                         kfree(firmware_version);
1190                                         kfree(rom_desc);
1191                                         kfree(ti_manuf_desc);
1192                                         return status;
1193                                 }
1194
1195                                 /* verify the write -- must do this in order
1196                                  * for write to complete before we do the
1197                                  * hardware reset
1198                                  */
1199                                 status = read_rom(serial,
1200                                                         start_address,
1201                                                         sizeof(record),
1202                                                         &record);
1203                                 if (status) {
1204                                         kfree(firmware_version);
1205                                         kfree(rom_desc);
1206                                         kfree(ti_manuf_desc);
1207                                         return status;
1208                                 }
1209
1210                                 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1211                                         dev_err(dev,
1212                                                 "%s - error resetting device\n",
1213                                                 __func__);
1214                                         kfree(firmware_version);
1215                                         kfree(rom_desc);
1216                                         kfree(ti_manuf_desc);
1217                                         return -ENODEV;
1218                                 }
1219
1220                                 dbg("%s - HARDWARE RESET", __func__);
1221
1222                                 /* Reset UMP -- Back to BOOT MODE */
1223                                 status = ti_vsend_sync(serial->serial->dev,
1224                                                 UMPC_HARDWARE_RESET,
1225                                                 0, 0, NULL, 0);
1226
1227                                 dbg("%s - HARDWARE RESET return %d",
1228                                                 __func__, status);
1229
1230                                 /* return an error on purpose. */
1231                                 kfree(firmware_version);
1232                                 kfree(rom_desc);
1233                                 kfree(ti_manuf_desc);
1234                                 return -ENODEV;
1235                         }
1236                         kfree(firmware_version);
1237                 }
1238                 /* Search for type 0xF2 record (firmware blank record) */
1239                 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1240 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1241                                         sizeof(struct ti_i2c_firmware_rec))
1242                         __u8 *header;
1243                         __u8 *vheader;
1244
1245                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1246                         if (!header) {
1247                                 dev_err(dev, "%s - out of memory.\n", __func__);
1248                                 kfree(rom_desc);
1249                                 kfree(ti_manuf_desc);
1250                                 return -ENOMEM;
1251                         }
1252
1253                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1254                         if (!vheader) {
1255                                 dev_err(dev, "%s - out of memory.\n", __func__);
1256                                 kfree(header);
1257                                 kfree(rom_desc);
1258                                 kfree(ti_manuf_desc);
1259                                 return -ENOMEM;
1260                         }
1261
1262                         dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1263                                                                 __func__);
1264
1265                         /*
1266                          * In order to update the I2C firmware we must change
1267                          * the type 2 record to type 0xF2. This will force the
1268                          * UMP to come up in Boot Mode.  Then while in boot
1269                          * mode, the driver will download the latest firmware
1270                          * (padded to 15.5k) into the UMP ram. Finally when the
1271                          * device comes back up in download mode the driver
1272                          * will cause the new firmware to be copied from the
1273                          * UMP Ram to I2C and the firmware will update the
1274                          * record type from 0xf2 to 0x02.
1275                          */
1276                         status = build_i2c_fw_hdr(header, dev);
1277                         if (status) {
1278                                 kfree(vheader);
1279                                 kfree(header);
1280                                 kfree(rom_desc);
1281                                 kfree(ti_manuf_desc);
1282                                 return status;
1283                         }
1284
1285                         /* Update I2C with type 0xf2 record with correct
1286                            size and checksum */
1287                         status = write_rom(serial,
1288                                                 start_address,
1289                                                 HEADER_SIZE,
1290                                                 header);
1291                         if (status) {
1292                                 kfree(vheader);
1293                                 kfree(header);
1294                                 kfree(rom_desc);
1295                                 kfree(ti_manuf_desc);
1296                                 return status;
1297                         }
1298
1299                         /* verify the write -- must do this in order for
1300                            write to complete before we do the hardware reset */
1301                         status = read_rom(serial, start_address,
1302                                                         HEADER_SIZE, vheader);
1303
1304                         if (status) {
1305                                 dbg("%s - can't read header back", __func__);
1306                                 kfree(vheader);
1307                                 kfree(header);
1308                                 kfree(rom_desc);
1309                                 kfree(ti_manuf_desc);
1310                                 return status;
1311                         }
1312                         if (memcmp(vheader, header, HEADER_SIZE)) {
1313                                 dbg("%s - write download record failed",
1314                                         __func__);
1315                                 kfree(vheader);
1316                                 kfree(header);
1317                                 kfree(rom_desc);
1318                                 kfree(ti_manuf_desc);
1319                                 return status;
1320                         }
1321
1322                         kfree(vheader);
1323                         kfree(header);
1324
1325                         dbg("%s - Start firmware update", __func__);
1326
1327                         /* Tell firmware to copy download image into I2C */
1328                         status = ti_vsend_sync(serial->serial->dev,
1329                                         UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1330
1331                         dbg("%s - Update complete 0x%x", __func__, status);
1332                         if (status) {
1333                                 dev_err(dev,
1334                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1335                                                                 __func__);
1336                                 kfree(rom_desc);
1337                                 kfree(ti_manuf_desc);
1338                                 return status;
1339                         }
1340                 }
1341
1342                 // The device is running the download code
1343                 kfree(rom_desc);
1344                 kfree(ti_manuf_desc);
1345                 return 0;
1346         }
1347
1348         /********************************************************************/
1349         /* Boot Mode */
1350         /********************************************************************/
1351         dbg("%s - RUNNING IN BOOT MODE", __func__);
1352
1353         /* Configure the TI device so we can use the BULK pipes for download */
1354         status = config_boot_dev(serial->serial->dev);
1355         if (status)
1356                 return status;
1357
1358         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1359                                                         != USB_VENDOR_ID_ION) {
1360                 dbg("%s - VID = 0x%x", __func__,
1361                      le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1362                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1363                 goto stayinbootmode;
1364         }
1365
1366         /* We have an ION device (I2c Must be programmed)
1367            Determine I2C image type */
1368         if (i2c_type_bootmode(serial))
1369                 goto stayinbootmode;
1370
1371         /* Check for ION Vendor ID and that the I2C is valid */
1372         if (!check_i2c_image(serial)) {
1373                 struct ti_i2c_image_header *header;
1374                 int i;
1375                 __u8 cs = 0;
1376                 __u8 *buffer;
1377                 int buffer_size;
1378                 int err;
1379                 const struct firmware *fw;
1380                 const char *fw_name = "edgeport/down3.bin";
1381
1382                 /* Validate Hardware version number
1383                  * Read Manufacturing Descriptor from TI Based Edgeport
1384                  */
1385                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1386                 if (!ti_manuf_desc) {
1387                         dev_err(dev, "%s - out of memory.\n", __func__);
1388                         return -ENOMEM;
1389                 }
1390                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1391                 if (status) {
1392                         kfree(ti_manuf_desc);
1393                         goto stayinbootmode;
1394                 }
1395
1396                 /* Check for version 2 */
1397                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1398                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1399                                         __func__, ti_cpu_rev(ti_manuf_desc));
1400                         kfree(ti_manuf_desc);
1401                         goto stayinbootmode;
1402                 }
1403
1404                 kfree(ti_manuf_desc);
1405
1406                 /*
1407                  * In order to update the I2C firmware we must change the type
1408                  * 2 record to type 0xF2. This will force the UMP to come up
1409                  * in Boot Mode.  Then while in boot mode, the driver will
1410                  * download the latest firmware (padded to 15.5k) into the
1411                  * UMP ram. Finally when the device comes back up in download
1412                  * mode the driver will cause the new firmware to be copied
1413                  * from the UMP Ram to I2C and the firmware will update the
1414                  * record type from 0xf2 to 0x02.
1415                  *
1416                  * Do we really have to copy the whole firmware image,
1417                  * or could we do this in place!
1418                  */
1419
1420                 /* Allocate a 15.5k buffer + 3 byte header */
1421                 buffer_size = (((1024 * 16) - 512) +
1422                                         sizeof(struct ti_i2c_image_header));
1423                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1424                 if (!buffer) {
1425                         dev_err(dev, "%s - out of memory\n", __func__);
1426                         return -ENOMEM;
1427                 }
1428
1429                 /* Initialize the buffer to 0xff (pad the buffer) */
1430                 memset(buffer, 0xff, buffer_size);
1431
1432                 err = request_firmware(&fw, fw_name, dev);
1433                 if (err) {
1434                         printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1435                                fw_name, err);
1436                         kfree(buffer);
1437                         return err;
1438                 }
1439                 memcpy(buffer, &fw->data[4], fw->size - 4);
1440                 release_firmware(fw);
1441
1442                 for (i = sizeof(struct ti_i2c_image_header);
1443                                 i < buffer_size; i++) {
1444                         cs = (__u8)(cs + buffer[i]);
1445                 }
1446
1447                 header = (struct ti_i2c_image_header *)buffer;
1448
1449                 /* update length and checksum after padding */
1450                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1451                                         sizeof(struct ti_i2c_image_header)));
1452                 header->CheckSum = cs;
1453
1454                 /* Download the operational code  */
1455                 dbg("%s - Downloading operational code image (TI UMP)",
1456                                                                 __func__);
1457                 status = download_code(serial, buffer, buffer_size);
1458
1459                 kfree(buffer);
1460
1461                 if (status) {
1462                         dbg("%s - Error downloading operational code image",
1463                                                                 __func__);
1464                         return status;
1465                 }
1466
1467                 /* Device will reboot */
1468                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1469
1470                 dbg("%s - Download successful -- Device rebooting...",
1471                                                                 __func__);
1472
1473                 /* return an error on purpose */
1474                 return -ENODEV;
1475         }
1476
1477 stayinbootmode:
1478         /* Eprom is invalid or blank stay in boot mode */
1479         dbg("%s - STAYING IN BOOT MODE", __func__);
1480         serial->product_info.TiMode = TI_MODE_BOOT;
1481
1482         return 0;
1483 }
1484
1485
1486 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1487 {
1488         int port_number = port->port->number - port->port->serial->minor;
1489         on = !!on;      /* 1 or 0 not bitmask */
1490         return send_cmd(port->port->serial->dev,
1491                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1492                         on, NULL, 0);
1493 }
1494
1495
1496 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1497 {
1498         int status = 0;
1499
1500         dbg("%s - %x", __func__, mcr);
1501
1502         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1503         if (status)
1504                 return status;
1505         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1506         if (status)
1507                 return status;
1508         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1509 }
1510
1511 /* Convert TI LSR to standard UART flags */
1512 static __u8 map_line_status(__u8 ti_lsr)
1513 {
1514         __u8 lsr = 0;
1515
1516 #define MAP_FLAG(flagUmp, flagUart)    \
1517         if (ti_lsr & flagUmp) \
1518                 lsr |= flagUart;
1519
1520         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1521         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1522         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1523         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1524         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1525         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1526
1527 #undef MAP_FLAG
1528
1529         return lsr;
1530 }
1531
1532 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1533 {
1534         struct async_icount *icount;
1535         struct tty_struct *tty;
1536
1537         dbg("%s - %02x", __func__, msr);
1538
1539         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1540                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1541                 icount = &edge_port->icount;
1542
1543                 /* update input line counters */
1544                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1545                         icount->cts++;
1546                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1547                         icount->dsr++;
1548                 if (msr & EDGEPORT_MSR_DELTA_CD)
1549                         icount->dcd++;
1550                 if (msr & EDGEPORT_MSR_DELTA_RI)
1551                         icount->rng++;
1552                 wake_up_interruptible(&edge_port->delta_msr_wait);
1553         }
1554
1555         /* Save the new modem status */
1556         edge_port->shadow_msr = msr & 0xf0;
1557
1558         tty = tty_port_tty_get(&edge_port->port->port);
1559         /* handle CTS flow control */
1560         if (tty && C_CRTSCTS(tty)) {
1561                 if (msr & EDGEPORT_MSR_CTS) {
1562                         tty->hw_stopped = 0;
1563                         tty_wakeup(tty);
1564                 } else {
1565                         tty->hw_stopped = 1;
1566                 }
1567         }
1568         tty_kref_put(tty);
1569
1570         return;
1571 }
1572
1573 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1574                                                         __u8 lsr, __u8 data)
1575 {
1576         struct async_icount *icount;
1577         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1578                                                 LSR_FRM_ERR | LSR_BREAK));
1579         struct tty_struct *tty;
1580
1581         dbg("%s - %02x", __func__, new_lsr);
1582
1583         edge_port->shadow_lsr = lsr;
1584
1585         if (new_lsr & LSR_BREAK)
1586                 /*
1587                  * Parity and Framing errors only count if they
1588                  * occur exclusive of a break being received.
1589                  */
1590                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1591
1592         /* Place LSR data byte into Rx buffer */
1593         if (lsr_data) {
1594                 tty = tty_port_tty_get(&edge_port->port->port);
1595                 if (tty) {
1596                         edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
1597                         tty_kref_put(tty);
1598                 }
1599         }
1600
1601         /* update input line counters */
1602         icount = &edge_port->icount;
1603         if (new_lsr & LSR_BREAK)
1604                 icount->brk++;
1605         if (new_lsr & LSR_OVER_ERR)
1606                 icount->overrun++;
1607         if (new_lsr & LSR_PAR_ERR)
1608                 icount->parity++;
1609         if (new_lsr & LSR_FRM_ERR)
1610                 icount->frame++;
1611 }
1612
1613
1614 static void edge_interrupt_callback(struct urb *urb)
1615 {
1616         struct edgeport_serial *edge_serial = urb->context;
1617         struct usb_serial_port *port;
1618         struct edgeport_port *edge_port;
1619         unsigned char *data = urb->transfer_buffer;
1620         int length = urb->actual_length;
1621         int port_number;
1622         int function;
1623         int retval;
1624         __u8 lsr;
1625         __u8 msr;
1626         int status = urb->status;
1627
1628         dbg("%s", __func__);
1629
1630         switch (status) {
1631         case 0:
1632                 /* success */
1633                 break;
1634         case -ECONNRESET:
1635         case -ENOENT:
1636         case -ESHUTDOWN:
1637                 /* this urb is terminated, clean up */
1638                 dbg("%s - urb shutting down with status: %d",
1639                     __func__, status);
1640                 return;
1641         default:
1642                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1643                         "%d\n", __func__, status);
1644                 goto exit;
1645         }
1646
1647         if (!length) {
1648                 dbg("%s - no data in urb", __func__);
1649                 goto exit;
1650         }
1651
1652         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1653                                                 __func__, length, data);
1654
1655         if (length != 2) {
1656                 dbg("%s - expecting packet of size 2, got %d",
1657                                                         __func__, length);
1658                 goto exit;
1659         }
1660
1661         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1662         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1663         dbg("%s - port_number %d, function %d, info 0x%x",
1664              __func__, port_number, function, data[1]);
1665         port = edge_serial->serial->port[port_number];
1666         edge_port = usb_get_serial_port_data(port);
1667         if (!edge_port) {
1668                 dbg("%s - edge_port not found", __func__);
1669                 return;
1670         }
1671         switch (function) {
1672         case TIUMP_INTERRUPT_CODE_LSR:
1673                 lsr = map_line_status(data[1]);
1674                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1675                         /* Save the LSR event for bulk read
1676                            completion routine */
1677                         dbg("%s - LSR Event Port %u LSR Status = %02x",
1678                              __func__, port_number, lsr);
1679                         edge_port->lsr_event = 1;
1680                         edge_port->lsr_mask = lsr;
1681                 } else {
1682                         dbg("%s - ===== Port %d LSR Status = %02x ======",
1683                              __func__, port_number, lsr);
1684                         handle_new_lsr(edge_port, 0, lsr, 0);
1685                 }
1686                 break;
1687
1688         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1689                 /* Copy MSR from UMP */
1690                 msr = data[1];
1691                 dbg("%s - ===== Port %u MSR Status = %02x ======\n",
1692                      __func__, port_number, msr);
1693                 handle_new_msr(edge_port, msr);
1694                 break;
1695
1696         default:
1697                 dev_err(&urb->dev->dev,
1698                         "%s - Unknown Interrupt code from UMP %x\n",
1699                         __func__, data[1]);
1700                 break;
1701
1702         }
1703
1704 exit:
1705         retval = usb_submit_urb(urb, GFP_ATOMIC);
1706         if (retval)
1707                 dev_err(&urb->dev->dev,
1708                         "%s - usb_submit_urb failed with result %d\n",
1709                          __func__, retval);
1710 }
1711
1712 static void edge_bulk_in_callback(struct urb *urb)
1713 {
1714         struct edgeport_port *edge_port = urb->context;
1715         unsigned char *data = urb->transfer_buffer;
1716         struct tty_struct *tty;
1717         int retval = 0;
1718         int port_number;
1719         int status = urb->status;
1720
1721         dbg("%s", __func__);
1722
1723         switch (status) {
1724         case 0:
1725                 /* success */
1726                 break;
1727         case -ECONNRESET:
1728         case -ENOENT:
1729         case -ESHUTDOWN:
1730                 /* this urb is terminated, clean up */
1731                 dbg("%s - urb shutting down with status: %d",
1732                     __func__, status);
1733                 return;
1734         default:
1735                 dev_err(&urb->dev->dev,
1736                         "%s - nonzero read bulk status received: %d\n",
1737                              __func__, status);
1738         }
1739
1740         if (status == -EPIPE)
1741                 goto exit;
1742
1743         if (status) {
1744                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1745                 return;
1746         }
1747
1748         port_number = edge_port->port->number - edge_port->port->serial->minor;
1749
1750         if (edge_port->lsr_event) {
1751                 edge_port->lsr_event = 0;
1752                 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1753                      __func__, port_number, edge_port->lsr_mask, *data);
1754                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1755                 /* Adjust buffer length/pointer */
1756                 --urb->actual_length;
1757                 ++data;
1758         }
1759
1760         tty = tty_port_tty_get(&edge_port->port->port);
1761         if (tty && urb->actual_length) {
1762                 usb_serial_debug_data(debug, &edge_port->port->dev,
1763                                         __func__, urb->actual_length, data);
1764                 if (edge_port->close_pending)
1765                         dbg("%s - close pending, dropping data on the floor",
1766                                                                 __func__);
1767                 else
1768                         edge_tty_recv(&edge_port->port->dev, tty, data,
1769                                                         urb->actual_length);
1770                 edge_port->icount.rx += urb->actual_length;
1771         }
1772         tty_kref_put(tty);
1773
1774 exit:
1775         /* continue read unless stopped */
1776         spin_lock(&edge_port->ep_lock);
1777         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1778                 urb->dev = edge_port->port->serial->dev;
1779                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1780         } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1781                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1782         }
1783         spin_unlock(&edge_port->ep_lock);
1784         if (retval)
1785                 dev_err(&urb->dev->dev,
1786                         "%s - usb_submit_urb failed with result %d\n",
1787                          __func__, retval);
1788 }
1789
1790 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1791                                         unsigned char *data, int length)
1792 {
1793         int queued;
1794
1795         tty_buffer_request_room(tty, length);
1796         queued = tty_insert_flip_string(tty, data, length);
1797         if (queued < length)
1798                 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1799                         __func__, length - queued);
1800         tty_flip_buffer_push(tty);
1801 }
1802
1803 static void edge_bulk_out_callback(struct urb *urb)
1804 {
1805         struct usb_serial_port *port = urb->context;
1806         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1807         int status = urb->status;
1808         struct tty_struct *tty;
1809
1810         dbg("%s - port %d", __func__, port->number);
1811
1812         edge_port->ep_write_urb_in_use = 0;
1813
1814         switch (status) {
1815         case 0:
1816                 /* success */
1817                 break;
1818         case -ECONNRESET:
1819         case -ENOENT:
1820         case -ESHUTDOWN:
1821                 /* this urb is terminated, clean up */
1822                 dbg("%s - urb shutting down with status: %d",
1823                     __func__, status);
1824                 return;
1825         default:
1826                 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1827                         "received: %d\n", __func__, status);
1828         }
1829
1830         /* send any buffered data */
1831         tty = tty_port_tty_get(&port->port);
1832         edge_send(tty);
1833         tty_kref_put(tty);
1834 }
1835
1836 static int edge_open(struct tty_struct *tty,
1837                         struct usb_serial_port *port, struct file *filp)
1838 {
1839         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1840         struct edgeport_serial *edge_serial;
1841         struct usb_device *dev;
1842         struct urb *urb;
1843         int port_number;
1844         int status;
1845         u16 open_settings;
1846         u8 transaction_timeout;
1847
1848         dbg("%s - port %d", __func__, port->number);
1849
1850         if (edge_port == NULL)
1851                 return -ENODEV;
1852
1853         if (tty)
1854                 tty->low_latency = low_latency;
1855
1856         port_number = port->number - port->serial->minor;
1857         switch (port_number) {
1858         case 0:
1859                 edge_port->uart_base = UMPMEM_BASE_UART1;
1860                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1861                 break;
1862         case 1:
1863                 edge_port->uart_base = UMPMEM_BASE_UART2;
1864                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1865                 break;
1866         default:
1867                 dev_err(&port->dev, "Unknown port number!!!\n");
1868                 return -ENODEV;
1869         }
1870
1871         dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1872                                 __func__, port_number, edge_port->uart_base,
1873                                 edge_port->dma_address);
1874
1875         dev = port->serial->dev;
1876
1877         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1878         init_waitqueue_head(&edge_port->delta_msr_wait);
1879
1880         /* turn off loopback */
1881         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1882         if (status) {
1883                 dev_err(&port->dev,
1884                                 "%s - cannot send clear loopback command, %d\n",
1885                         __func__, status);
1886                 return status;
1887         }
1888
1889         /* set up the port settings */
1890         if (tty)
1891                 edge_set_termios(tty, port, tty->termios);
1892
1893         /* open up the port */
1894
1895         /* milliseconds to timeout for DMA transfer */
1896         transaction_timeout = 2;
1897
1898         edge_port->ump_read_timeout =
1899                                 max(20, ((transaction_timeout * 3) / 2));
1900
1901         /* milliseconds to timeout for DMA transfer */
1902         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1903                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1904                              (transaction_timeout << 2));
1905
1906         dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1907
1908         /* Tell TI to open and start the port */
1909         status = send_cmd(dev, UMPC_OPEN_PORT,
1910                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1911         if (status) {
1912                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1913                                                         __func__, status);
1914                 return status;
1915         }
1916
1917         /* Start the DMA? */
1918         status = send_cmd(dev, UMPC_START_PORT,
1919                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1920         if (status) {
1921                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1922                                                         __func__, status);
1923                 return status;
1924         }
1925
1926         /* Clear TX and RX buffers in UMP */
1927         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1928         if (status) {
1929                 dev_err(&port->dev,
1930                         "%s - cannot send clear buffers command, %d\n",
1931                         __func__, status);
1932                 return status;
1933         }
1934
1935         /* Read Initial MSR */
1936         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1937                                 (__u16)(UMPM_UART1_PORT + port_number),
1938                                 &edge_port->shadow_msr, 1);
1939         if (status) {
1940                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1941                                                         __func__, status);
1942                 return status;
1943         }
1944
1945         dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1946
1947         /* Set Initial MCR */
1948         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1949         dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1950
1951         edge_serial = edge_port->edge_serial;
1952         if (mutex_lock_interruptible(&edge_serial->es_lock))
1953                 return -ERESTARTSYS;
1954         if (edge_serial->num_ports_open == 0) {
1955                 /* we are the first port to open, post the interrupt urb */
1956                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1957                 if (!urb) {
1958                         dev_err(&port->dev,
1959                                 "%s - no interrupt urb present, exiting\n",
1960                                 __func__);
1961                         status = -EINVAL;
1962                         goto release_es_lock;
1963                 }
1964                 urb->complete = edge_interrupt_callback;
1965                 urb->context = edge_serial;
1966                 urb->dev = dev;
1967                 status = usb_submit_urb(urb, GFP_KERNEL);
1968                 if (status) {
1969                         dev_err(&port->dev,
1970                                 "%s - usb_submit_urb failed with value %d\n",
1971                                         __func__, status);
1972                         goto release_es_lock;
1973                 }
1974         }
1975
1976         /*
1977          * reset the data toggle on the bulk endpoints to work around bug in
1978          * host controllers where things get out of sync some times
1979          */
1980         usb_clear_halt(dev, port->write_urb->pipe);
1981         usb_clear_halt(dev, port->read_urb->pipe);
1982
1983         /* start up our bulk read urb */
1984         urb = port->read_urb;
1985         if (!urb) {
1986                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1987                                                                 __func__);
1988                 status = -EINVAL;
1989                 goto unlink_int_urb;
1990         }
1991         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1992         urb->complete = edge_bulk_in_callback;
1993         urb->context = edge_port;
1994         urb->dev = dev;
1995         status = usb_submit_urb(urb, GFP_KERNEL);
1996         if (status) {
1997                 dev_err(&port->dev,
1998                         "%s - read bulk usb_submit_urb failed with value %d\n",
1999                                 __func__, status);
2000                 goto unlink_int_urb;
2001         }
2002
2003         ++edge_serial->num_ports_open;
2004
2005         dbg("%s - exited", __func__);
2006
2007         goto release_es_lock;
2008
2009 unlink_int_urb:
2010         if (edge_port->edge_serial->num_ports_open == 0)
2011                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2012 release_es_lock:
2013         mutex_unlock(&edge_serial->es_lock);
2014         return status;
2015 }
2016
2017 static void edge_close(struct tty_struct *tty,
2018                         struct usb_serial_port *port, struct file *filp)
2019 {
2020         struct edgeport_serial *edge_serial;
2021         struct edgeport_port *edge_port;
2022         int port_number;
2023         int status;
2024
2025         dbg("%s - port %d", __func__, port->number);
2026
2027         edge_serial = usb_get_serial_data(port->serial);
2028         edge_port = usb_get_serial_port_data(port);
2029         if (edge_serial == NULL || edge_port == NULL)
2030                 return;
2031
2032         /* The bulkreadcompletion routine will check
2033          * this flag and dump add read data */
2034         edge_port->close_pending = 1;
2035
2036         /* chase the port close and flush */
2037         chase_port(edge_port, (HZ * closing_wait) / 100, 1);
2038
2039         usb_kill_urb(port->read_urb);
2040         usb_kill_urb(port->write_urb);
2041         edge_port->ep_write_urb_in_use = 0;
2042
2043         /* assuming we can still talk to the device,
2044          * send a close port command to it */
2045         dbg("%s - send umpc_close_port", __func__);
2046         port_number = port->number - port->serial->minor;
2047         status = send_cmd(port->serial->dev,
2048                                      UMPC_CLOSE_PORT,
2049                                      (__u8)(UMPM_UART1_PORT + port_number),
2050                                      0,
2051                                      NULL,
2052                                      0);
2053         mutex_lock(&edge_serial->es_lock);
2054         --edge_port->edge_serial->num_ports_open;
2055         if (edge_port->edge_serial->num_ports_open <= 0) {
2056                 /* last port is now closed, let's shut down our interrupt urb */
2057                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2058                 edge_port->edge_serial->num_ports_open = 0;
2059         }
2060         mutex_unlock(&edge_serial->es_lock);
2061         edge_port->close_pending = 0;
2062
2063         dbg("%s - exited", __func__);
2064 }
2065
2066 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2067                                 const unsigned char *data, int count)
2068 {
2069         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2070         unsigned long flags;
2071
2072         dbg("%s - port %d", __func__, port->number);
2073
2074         if (count == 0) {
2075                 dbg("%s - write request of 0 bytes", __func__);
2076                 return 0;
2077         }
2078
2079         if (edge_port == NULL)
2080                 return -ENODEV;
2081         if (edge_port->close_pending == 1)
2082                 return -ENODEV;
2083
2084         spin_lock_irqsave(&edge_port->ep_lock, flags);
2085         count = edge_buf_put(edge_port->ep_out_buf, data, count);
2086         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2087
2088         edge_send(tty);
2089
2090         return count;
2091 }
2092
2093 static void edge_send(struct tty_struct *tty)
2094 {
2095         struct usb_serial_port *port = tty->driver_data;
2096         int count, result;
2097         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2098         unsigned long flags;
2099
2100
2101         dbg("%s - port %d", __func__, port->number);
2102
2103         spin_lock_irqsave(&edge_port->ep_lock, flags);
2104
2105         if (edge_port->ep_write_urb_in_use) {
2106                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2107                 return;
2108         }
2109
2110         count = edge_buf_get(edge_port->ep_out_buf,
2111                                 port->write_urb->transfer_buffer,
2112                                 port->bulk_out_size);
2113
2114         if (count == 0) {
2115                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2116                 return;
2117         }
2118
2119         edge_port->ep_write_urb_in_use = 1;
2120
2121         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2122
2123         usb_serial_debug_data(debug, &port->dev, __func__, count,
2124                                 port->write_urb->transfer_buffer);
2125
2126         /* set up our urb */
2127         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
2128                            usb_sndbulkpipe(port->serial->dev,
2129                                             port->bulk_out_endpointAddress),
2130                            port->write_urb->transfer_buffer, count,
2131                            edge_bulk_out_callback,
2132                            port);
2133
2134         /* send the data out the bulk port */
2135         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2136         if (result) {
2137                 dev_err(&port->dev,
2138                         "%s - failed submitting write urb, error %d\n",
2139                                 __func__, result);
2140                 edge_port->ep_write_urb_in_use = 0;
2141                 /* TODO: reschedule edge_send */
2142         } else
2143                 edge_port->icount.tx += count;
2144
2145         /* wakeup any process waiting for writes to complete */
2146         /* there is now more room in the buffer for new writes */
2147         if (tty)
2148                 tty_wakeup(tty);
2149 }
2150
2151 static int edge_write_room(struct tty_struct *tty)
2152 {
2153         struct usb_serial_port *port = tty->driver_data;
2154         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2155         int room = 0;
2156         unsigned long flags;
2157
2158         dbg("%s - port %d", __func__, port->number);
2159
2160         if (edge_port == NULL)
2161                 return 0;
2162         if (edge_port->close_pending == 1)
2163                 return 0;
2164
2165         spin_lock_irqsave(&edge_port->ep_lock, flags);
2166         room = edge_buf_space_avail(edge_port->ep_out_buf);
2167         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2168
2169         dbg("%s - returns %d", __func__, room);
2170         return room;
2171 }
2172
2173 static int edge_chars_in_buffer(struct tty_struct *tty)
2174 {
2175         struct usb_serial_port *port = tty->driver_data;
2176         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2177         int chars = 0;
2178         unsigned long flags;
2179
2180         dbg("%s - port %d", __func__, port->number);
2181
2182         if (edge_port == NULL)
2183                 return 0;
2184         if (edge_port->close_pending == 1)
2185                 return 0;
2186
2187         spin_lock_irqsave(&edge_port->ep_lock, flags);
2188         chars = edge_buf_data_avail(edge_port->ep_out_buf);
2189         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2190
2191         dbg("%s - returns %d", __func__, chars);
2192         return chars;
2193 }
2194
2195 static void edge_throttle(struct tty_struct *tty)
2196 {
2197         struct usb_serial_port *port = tty->driver_data;
2198         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2199         int status;
2200
2201         dbg("%s - port %d", __func__, port->number);
2202
2203         if (edge_port == NULL)
2204                 return;
2205
2206         /* if we are implementing XON/XOFF, send the stop character */
2207         if (I_IXOFF(tty)) {
2208                 unsigned char stop_char = STOP_CHAR(tty);
2209                 status = edge_write(tty, port, &stop_char, 1);
2210                 if (status <= 0) {
2211                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2212                 }
2213         }
2214
2215         /* if we are implementing RTS/CTS, stop reads */
2216         /* and the Edgeport will clear the RTS line */
2217         if (C_CRTSCTS(tty))
2218                 stop_read(edge_port);
2219
2220 }
2221
2222 static void edge_unthrottle(struct tty_struct *tty)
2223 {
2224         struct usb_serial_port *port = tty->driver_data;
2225         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2226         int status;
2227
2228         dbg("%s - port %d", __func__, port->number);
2229
2230         if (edge_port == NULL)
2231                 return;
2232
2233         /* if we are implementing XON/XOFF, send the start character */
2234         if (I_IXOFF(tty)) {
2235                 unsigned char start_char = START_CHAR(tty);
2236                 status = edge_write(tty, port, &start_char, 1);
2237                 if (status <= 0) {
2238                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2239                 }
2240         }
2241         /* if we are implementing RTS/CTS, restart reads */
2242         /* are the Edgeport will assert the RTS line */
2243         if (C_CRTSCTS(tty)) {
2244                 status = restart_read(edge_port);
2245                 if (status)
2246                         dev_err(&port->dev,
2247                                 "%s - read bulk usb_submit_urb failed: %d\n",
2248                                                         __func__, status);
2249         }
2250
2251 }
2252
2253 static void stop_read(struct edgeport_port *edge_port)
2254 {
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_RUNNING)
2260                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2261         edge_port->shadow_mcr &= ~MCR_RTS;
2262
2263         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2264 }
2265
2266 static int restart_read(struct edgeport_port *edge_port)
2267 {
2268         struct urb *urb;
2269         int status = 0;
2270         unsigned long flags;
2271
2272         spin_lock_irqsave(&edge_port->ep_lock, flags);
2273
2274         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2275                 urb = edge_port->port->read_urb;
2276                 urb->complete = edge_bulk_in_callback;
2277                 urb->context = edge_port;
2278                 urb->dev = edge_port->port->serial->dev;
2279                 status = usb_submit_urb(urb, GFP_ATOMIC);
2280         }
2281         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2282         edge_port->shadow_mcr |= MCR_RTS;
2283
2284         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2285
2286         return status;
2287 }
2288
2289 static void change_port_settings(struct tty_struct *tty,
2290                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2291 {
2292         struct ump_uart_config *config;
2293         int baud;
2294         unsigned cflag;
2295         int status;
2296         int port_number = edge_port->port->number -
2297                                         edge_port->port->serial->minor;
2298
2299         dbg("%s - port %d", __func__, edge_port->port->number);
2300
2301         config = kmalloc (sizeof (*config), GFP_KERNEL);
2302         if (!config) {
2303                 *tty->termios = *old_termios;
2304                 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2305                                                                 __func__);
2306                 return;
2307         }
2308
2309         cflag = tty->termios->c_cflag;
2310
2311         config->wFlags = 0;
2312
2313         /* These flags must be set */
2314         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2315         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2316         config->bUartMode = (__u8)(edge_port->bUartMode);
2317
2318         switch (cflag & CSIZE) {
2319         case CS5:
2320                     config->bDataBits = UMP_UART_CHAR5BITS;
2321                     dbg("%s - data bits = 5", __func__);
2322                     break;
2323         case CS6:
2324                     config->bDataBits = UMP_UART_CHAR6BITS;
2325                     dbg("%s - data bits = 6", __func__);
2326                     break;
2327         case CS7:
2328                     config->bDataBits = UMP_UART_CHAR7BITS;
2329                     dbg("%s - data bits = 7", __func__);
2330                     break;
2331         default:
2332         case CS8:
2333                     config->bDataBits = UMP_UART_CHAR8BITS;
2334                     dbg("%s - data bits = 8", __func__);
2335                             break;
2336         }
2337
2338         if (cflag & PARENB) {
2339                 if (cflag & PARODD) {
2340                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2341                         config->bParity = UMP_UART_ODDPARITY;
2342                         dbg("%s - parity = odd", __func__);
2343                 } else {
2344                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2345                         config->bParity = UMP_UART_EVENPARITY;
2346                         dbg("%s - parity = even", __func__);
2347                 }
2348         } else {
2349                 config->bParity = UMP_UART_NOPARITY;
2350                 dbg("%s - parity = none", __func__);
2351         }
2352
2353         if (cflag & CSTOPB) {
2354                 config->bStopBits = UMP_UART_STOPBIT2;
2355                 dbg("%s - stop bits = 2", __func__);
2356         } else {
2357                 config->bStopBits = UMP_UART_STOPBIT1;
2358                 dbg("%s - stop bits = 1", __func__);
2359         }
2360
2361         /* figure out the flow control settings */
2362         if (cflag & CRTSCTS) {
2363                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2364                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2365                 dbg("%s - RTS/CTS is enabled", __func__);
2366         } else {
2367                 dbg("%s - RTS/CTS is disabled", __func__);
2368                 tty->hw_stopped = 0;
2369                 restart_read(edge_port);
2370         }
2371
2372         /* if we are implementing XON/XOFF, set the start and stop
2373            character in the device */
2374         config->cXon  = START_CHAR(tty);
2375         config->cXoff = STOP_CHAR(tty);
2376
2377         /* if we are implementing INBOUND XON/XOFF */
2378         if (I_IXOFF(tty)) {
2379                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2380                 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2381                      __func__, config->cXon, config->cXoff);
2382         } else
2383                 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2384
2385         /* if we are implementing OUTBOUND XON/XOFF */
2386         if (I_IXON(tty)) {
2387                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2388                 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2389                      __func__, config->cXon, config->cXoff);
2390         } else
2391                 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2392
2393         tty->termios->c_cflag &= ~CMSPAR;
2394
2395         /* Round the baud rate */
2396         baud = tty_get_baud_rate(tty);
2397         if (!baud) {
2398                 /* pick a default, any default... */
2399                 baud = 9600;
2400         } else
2401                 tty_encode_baud_rate(tty, baud, baud);
2402
2403         edge_port->baud_rate = baud;
2404         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2405
2406         /* FIXME: Recompute actual baud from divisor here */
2407
2408         dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2409                                                         config->wBaudRate);
2410
2411         dbg("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
2412         dbg("wFlags:    0x%x", config->wFlags);
2413         dbg("bDataBits:   %d", config->bDataBits);
2414         dbg("bParity:     %d", config->bParity);
2415         dbg("bStopBits:   %d", config->bStopBits);
2416         dbg("cXon:        %d", config->cXon);
2417         dbg("cXoff:       %d", config->cXoff);
2418         dbg("bUartMode:   %d", config->bUartMode);
2419
2420         /* move the word values into big endian mode */
2421         cpu_to_be16s(&config->wFlags);
2422         cpu_to_be16s(&config->wBaudRate);
2423
2424         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2425                                 (__u8)(UMPM_UART1_PORT + port_number),
2426                                 0, (__u8 *)config, sizeof(*config));
2427         if (status)
2428                 dbg("%s - error %d when trying to write config to device",
2429                      __func__, status);
2430         kfree(config);
2431         return;
2432 }
2433
2434 static void edge_set_termios(struct tty_struct *tty,
2435                 struct usb_serial_port *port, struct ktermios *old_termios)
2436 {
2437         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2438         unsigned int cflag;
2439
2440         cflag = tty->termios->c_cflag;
2441
2442         dbg("%s - clfag %08x iflag %08x", __func__,
2443             tty->termios->c_cflag, tty->termios->c_iflag);
2444         dbg("%s - old clfag %08x old iflag %08x", __func__,
2445             old_termios->c_cflag, old_termios->c_iflag);
2446         dbg("%s - port %d", __func__, port->number);
2447
2448         if (edge_port == NULL)
2449                 return;
2450         /* change the port settings to the new ones specified */
2451         change_port_settings(tty, edge_port, old_termios);
2452         return;
2453 }
2454
2455 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
2456                                         unsigned int set, unsigned int clear)
2457 {
2458         struct usb_serial_port *port = tty->driver_data;
2459         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2460         unsigned int mcr;
2461         unsigned long flags;
2462
2463         dbg("%s - port %d", __func__, port->number);
2464
2465         spin_lock_irqsave(&edge_port->ep_lock, flags);
2466         mcr = edge_port->shadow_mcr;
2467         if (set & TIOCM_RTS)
2468                 mcr |= MCR_RTS;
2469         if (set & TIOCM_DTR)
2470                 mcr |= MCR_DTR;
2471         if (set & TIOCM_LOOP)
2472                 mcr |= MCR_LOOPBACK;
2473
2474         if (clear & TIOCM_RTS)
2475                 mcr &= ~MCR_RTS;
2476         if (clear & TIOCM_DTR)
2477                 mcr &= ~MCR_DTR;
2478         if (clear & TIOCM_LOOP)
2479                 mcr &= ~MCR_LOOPBACK;
2480
2481         edge_port->shadow_mcr = mcr;
2482         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2483
2484         restore_mcr(edge_port, mcr);
2485         return 0;
2486 }
2487
2488 static int edge_tiocmget(struct tty_struct *tty, struct file *file)
2489 {
2490         struct usb_serial_port *port = tty->driver_data;
2491         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2492         unsigned int result = 0;
2493         unsigned int msr;
2494         unsigned int mcr;
2495         unsigned long flags;
2496
2497         dbg("%s - port %d", __func__, port->number);
2498
2499         spin_lock_irqsave(&edge_port->ep_lock, flags);
2500
2501         msr = edge_port->shadow_msr;
2502         mcr = edge_port->shadow_mcr;
2503         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2504                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2505                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2506                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2507                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2508                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2509
2510
2511         dbg("%s -- %x", __func__, result);
2512         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2513
2514         return result;
2515 }
2516
2517 static int get_serial_info(struct edgeport_port *edge_port,
2518                                 struct serial_struct __user *retinfo)
2519 {
2520         struct serial_struct tmp;
2521
2522         if (!retinfo)
2523                 return -EFAULT;
2524
2525         memset(&tmp, 0, sizeof(tmp));
2526
2527         tmp.type                = PORT_16550A;
2528         tmp.line                = edge_port->port->serial->minor;
2529         tmp.port                = edge_port->port->number;
2530         tmp.irq                 = 0;
2531         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2532         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2533         tmp.baud_base           = 9600;
2534         tmp.close_delay         = 5*HZ;
2535         tmp.closing_wait        = closing_wait;
2536
2537         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2538                 return -EFAULT;
2539         return 0;
2540 }
2541
2542 static int edge_ioctl(struct tty_struct *tty, struct file *file,
2543                                         unsigned int cmd, unsigned long arg)
2544 {
2545         struct usb_serial_port *port = tty->driver_data;
2546         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2547         struct async_icount cnow;
2548         struct async_icount cprev;
2549
2550         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2551
2552         switch (cmd) {
2553         case TIOCGSERIAL:
2554                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2555                 return get_serial_info(edge_port,
2556                                 (struct serial_struct __user *) arg);
2557         case TIOCMIWAIT:
2558                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2559                 cprev = edge_port->icount;
2560                 while (1) {
2561                         interruptible_sleep_on(&edge_port->delta_msr_wait);
2562                         /* see if a signal did it */
2563                         if (signal_pending(current))
2564                                 return -ERESTARTSYS;
2565                         cnow = edge_port->icount;
2566                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2567                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2568                                 return -EIO; /* no change => error */
2569                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2570                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2571                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2572                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2573                                 return 0;
2574                         }
2575                         cprev = cnow;
2576                 }
2577                 /* not reached */
2578                 break;
2579         case TIOCGICOUNT:
2580                 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2581                      port->number, edge_port->icount.rx, edge_port->icount.tx);
2582                 if (copy_to_user((void __user *)arg, &edge_port->icount,
2583                                 sizeof(edge_port->icount)))
2584                         return -EFAULT;
2585                 return 0;
2586         }
2587         return -ENOIOCTLCMD;
2588 }
2589
2590 static void edge_break(struct tty_struct *tty, int break_state)
2591 {
2592         struct usb_serial_port *port = tty->driver_data;
2593         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2594         int status;
2595         int bv = 0;     /* Off */
2596
2597         dbg("%s - state = %d", __func__, break_state);
2598
2599         /* chase the port close */
2600         chase_port(edge_port, 0, 0);
2601
2602         if (break_state == -1)
2603                 bv = 1; /* On */
2604         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2605         if (status)
2606                 dbg("%s - error %d sending break set/clear command.",
2607                      __func__, status);
2608 }
2609
2610 static int edge_startup(struct usb_serial *serial)
2611 {
2612         struct edgeport_serial *edge_serial;
2613         struct edgeport_port *edge_port;
2614         struct usb_device *dev;
2615         int status;
2616         int i;
2617
2618         dev = serial->dev;
2619
2620         /* create our private serial structure */
2621         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2622         if (edge_serial == NULL) {
2623                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2624                 return -ENOMEM;
2625         }
2626         mutex_init(&edge_serial->es_lock);
2627         edge_serial->serial = serial;
2628         usb_set_serial_data(serial, edge_serial);
2629
2630         status = download_fw(edge_serial);
2631         if (status) {
2632                 kfree(edge_serial);
2633                 return status;
2634         }
2635
2636         /* set up our port private structures */
2637         for (i = 0; i < serial->num_ports; ++i) {
2638                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2639                 if (edge_port == NULL) {
2640                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2641                                                                 __func__);
2642                         goto cleanup;
2643                 }
2644                 spin_lock_init(&edge_port->ep_lock);
2645                 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
2646                 if (edge_port->ep_out_buf == NULL) {
2647                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2648                                                                 __func__);
2649                         kfree(edge_port);
2650                         goto cleanup;
2651                 }
2652                 edge_port->port = serial->port[i];
2653                 edge_port->edge_serial = edge_serial;
2654                 usb_set_serial_port_data(serial->port[i], edge_port);
2655                 edge_port->bUartMode = default_uart_mode;
2656         }
2657
2658         return 0;
2659
2660 cleanup:
2661         for (--i; i >= 0; --i) {
2662                 edge_port = usb_get_serial_port_data(serial->port[i]);
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(edge_serial);
2668         usb_set_serial_data(serial, NULL);
2669         return -ENOMEM;
2670 }
2671
2672 static void edge_shutdown(struct usb_serial *serial)
2673 {
2674         int i;
2675         struct edgeport_port *edge_port;
2676
2677         dbg("%s", __func__);
2678
2679         for (i = 0; i < serial->num_ports; ++i) {
2680                 edge_port = usb_get_serial_port_data(serial->port[i]);
2681                 edge_remove_sysfs_attrs(edge_port->port);
2682                 edge_buf_free(edge_port->ep_out_buf);
2683                 kfree(edge_port);
2684                 usb_set_serial_port_data(serial->port[i], NULL);
2685         }
2686         kfree(usb_get_serial_data(serial));
2687         usb_set_serial_data(serial, NULL);
2688 }
2689
2690
2691 /* Sysfs Attributes */
2692
2693 static ssize_t show_uart_mode(struct device *dev,
2694         struct device_attribute *attr, char *buf)
2695 {
2696         struct usb_serial_port *port = to_usb_serial_port(dev);
2697         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2698
2699         return sprintf(buf, "%d\n", edge_port->bUartMode);
2700 }
2701
2702 static ssize_t store_uart_mode(struct device *dev,
2703         struct device_attribute *attr, const char *valbuf, size_t count)
2704 {
2705         struct usb_serial_port *port = to_usb_serial_port(dev);
2706         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2707         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2708
2709         dbg("%s: setting uart_mode = %d", __func__, v);
2710
2711         if (v < 256)
2712                 edge_port->bUartMode = v;
2713         else
2714                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2715
2716         return count;
2717 }
2718
2719 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2720                                                         store_uart_mode);
2721
2722 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2723 {
2724         return device_create_file(&port->dev, &dev_attr_uart_mode);
2725 }
2726
2727 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2728 {
2729         device_remove_file(&port->dev, &dev_attr_uart_mode);
2730         return 0;
2731 }
2732
2733
2734 /* Circular Buffer */
2735
2736 /*
2737  * edge_buf_alloc
2738  *
2739  * Allocate a circular buffer and all associated memory.
2740  */
2741
2742 static struct edge_buf *edge_buf_alloc(unsigned int size)
2743 {
2744         struct edge_buf *eb;
2745
2746
2747         if (size == 0)
2748                 return NULL;
2749
2750         eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
2751         if (eb == NULL)
2752                 return NULL;
2753
2754         eb->buf_buf = kmalloc(size, GFP_KERNEL);
2755         if (eb->buf_buf == NULL) {
2756                 kfree(eb);
2757                 return NULL;
2758         }
2759
2760         eb->buf_size = size;
2761         eb->buf_get = eb->buf_put = eb->buf_buf;
2762
2763         return eb;
2764 }
2765
2766
2767 /*
2768  * edge_buf_free
2769  *
2770  * Free the buffer and all associated memory.
2771  */
2772
2773 static void edge_buf_free(struct edge_buf *eb)
2774 {
2775         if (eb) {
2776                 kfree(eb->buf_buf);
2777                 kfree(eb);
2778         }
2779 }
2780
2781
2782 /*
2783  * edge_buf_clear
2784  *
2785  * Clear out all data in the circular buffer.
2786  */
2787
2788 static void edge_buf_clear(struct edge_buf *eb)
2789 {
2790         if (eb != NULL)
2791                 eb->buf_get = eb->buf_put;
2792         /* equivalent to a get of all data available */
2793 }
2794
2795
2796 /*
2797  * edge_buf_data_avail
2798  *
2799  * Return the number of bytes of data available in the circular
2800  * buffer.
2801  */
2802
2803 static unsigned int edge_buf_data_avail(struct edge_buf *eb)
2804 {
2805         if (eb == NULL)
2806                 return 0;
2807         return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
2808 }
2809
2810
2811 /*
2812  * edge_buf_space_avail
2813  *
2814  * Return the number of bytes of space available in the circular
2815  * buffer.
2816  */
2817
2818 static unsigned int edge_buf_space_avail(struct edge_buf *eb)
2819 {
2820         if (eb == NULL)
2821                 return 0;
2822         return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
2823 }
2824
2825
2826 /*
2827  * edge_buf_put
2828  *
2829  * Copy data data from a user buffer and put it into the circular buffer.
2830  * Restrict to the amount of space available.
2831  *
2832  * Return the number of bytes copied.
2833  */
2834
2835 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
2836         unsigned int count)
2837 {
2838         unsigned int len;
2839
2840
2841         if (eb == NULL)
2842                 return 0;
2843
2844         len  = edge_buf_space_avail(eb);
2845         if (count > len)
2846                 count = len;
2847
2848         if (count == 0)
2849                 return 0;
2850
2851         len = eb->buf_buf + eb->buf_size - eb->buf_put;
2852         if (count > len) {
2853                 memcpy(eb->buf_put, buf, len);
2854                 memcpy(eb->buf_buf, buf+len, count - len);
2855                 eb->buf_put = eb->buf_buf + count - len;
2856         } else {
2857                 memcpy(eb->buf_put, buf, count);
2858                 if (count < len)
2859                         eb->buf_put += count;
2860                 else /* count == len */
2861                         eb->buf_put = eb->buf_buf;
2862         }
2863
2864         return count;
2865 }
2866
2867
2868 /*
2869  * edge_buf_get
2870  *
2871  * Get data from the circular buffer and copy to the given buffer.
2872  * Restrict to the amount of data available.
2873  *
2874  * Return the number of bytes copied.
2875  */
2876
2877 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
2878         unsigned int count)
2879 {
2880         unsigned int len;
2881
2882
2883         if (eb == NULL)
2884                 return 0;
2885
2886         len = edge_buf_data_avail(eb);
2887         if (count > len)
2888                 count = len;
2889
2890         if (count == 0)
2891                 return 0;
2892
2893         len = eb->buf_buf + eb->buf_size - eb->buf_get;
2894         if (count > len) {
2895                 memcpy(buf, eb->buf_get, len);
2896                 memcpy(buf+len, eb->buf_buf, count - len);
2897                 eb->buf_get = eb->buf_buf + count - len;
2898         } else {
2899                 memcpy(buf, eb->buf_get, count);
2900                 if (count < len)
2901                         eb->buf_get += count;
2902                 else /* count == len */
2903                         eb->buf_get = eb->buf_buf;
2904         }
2905
2906         return count;
2907 }
2908
2909
2910 static struct usb_serial_driver edgeport_1port_device = {
2911         .driver = {
2912                 .owner          = THIS_MODULE,
2913                 .name           = "edgeport_ti_1",
2914         },
2915         .description            = "Edgeport TI 1 port adapter",
2916         .usb_driver             = &io_driver,
2917         .id_table               = edgeport_1port_id_table,
2918         .num_ports              = 1,
2919         .open                   = edge_open,
2920         .close                  = edge_close,
2921         .throttle               = edge_throttle,
2922         .unthrottle             = edge_unthrottle,
2923         .attach                 = edge_startup,
2924         .shutdown               = edge_shutdown,
2925         .port_probe             = edge_create_sysfs_attrs,
2926         .ioctl                  = edge_ioctl,
2927         .set_termios            = edge_set_termios,
2928         .tiocmget               = edge_tiocmget,
2929         .tiocmset               = edge_tiocmset,
2930         .write                  = edge_write,
2931         .write_room             = edge_write_room,
2932         .chars_in_buffer        = edge_chars_in_buffer,
2933         .break_ctl              = edge_break,
2934         .read_int_callback      = edge_interrupt_callback,
2935         .read_bulk_callback     = edge_bulk_in_callback,
2936         .write_bulk_callback    = edge_bulk_out_callback,
2937 };
2938
2939 static struct usb_serial_driver edgeport_2port_device = {
2940         .driver = {
2941                 .owner          = THIS_MODULE,
2942                 .name           = "edgeport_ti_2",
2943         },
2944         .description            = "Edgeport TI 2 port adapter",
2945         .usb_driver             = &io_driver,
2946         .id_table               = edgeport_2port_id_table,
2947         .num_ports              = 2,
2948         .open                   = edge_open,
2949         .close                  = edge_close,
2950         .throttle               = edge_throttle,
2951         .unthrottle             = edge_unthrottle,
2952         .attach                 = edge_startup,
2953         .shutdown               = edge_shutdown,
2954         .port_probe             = edge_create_sysfs_attrs,
2955         .ioctl                  = edge_ioctl,
2956         .set_termios            = edge_set_termios,
2957         .tiocmget               = edge_tiocmget,
2958         .tiocmset               = edge_tiocmset,
2959         .write                  = edge_write,
2960         .write_room             = edge_write_room,
2961         .chars_in_buffer        = edge_chars_in_buffer,
2962         .break_ctl              = edge_break,
2963         .read_int_callback      = edge_interrupt_callback,
2964         .read_bulk_callback     = edge_bulk_in_callback,
2965         .write_bulk_callback    = edge_bulk_out_callback,
2966 };
2967
2968
2969 static int __init edgeport_init(void)
2970 {
2971         int retval;
2972         retval = usb_serial_register(&edgeport_1port_device);
2973         if (retval)
2974                 goto failed_1port_device_register;
2975         retval = usb_serial_register(&edgeport_2port_device);
2976         if (retval)
2977                 goto failed_2port_device_register;
2978         retval = usb_register(&io_driver);
2979         if (retval)
2980                 goto failed_usb_register;
2981         info(DRIVER_DESC " " DRIVER_VERSION);
2982         return 0;
2983 failed_usb_register:
2984         usb_serial_deregister(&edgeport_2port_device);
2985 failed_2port_device_register:
2986         usb_serial_deregister(&edgeport_1port_device);
2987 failed_1port_device_register:
2988         return retval;
2989 }
2990
2991 static void __exit edgeport_exit(void)
2992 {
2993         usb_deregister(&io_driver);
2994         usb_serial_deregister(&edgeport_1port_device);
2995         usb_serial_deregister(&edgeport_2port_device);
2996 }
2997
2998 module_init(edgeport_init);
2999 module_exit(edgeport_exit);
3000
3001 /* Module information */
3002 MODULE_AUTHOR(DRIVER_AUTHOR);
3003 MODULE_DESCRIPTION(DRIVER_DESC);
3004 MODULE_LICENSE("GPL");
3005 MODULE_FIRMWARE("edgeport/down3.bin");
3006
3007 module_param(debug, bool, S_IRUGO | S_IWUSR);
3008 MODULE_PARM_DESC(debug, "Debug enabled or not");
3009
3010 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3011 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
3012
3013 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
3014 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
3015
3016 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
3017 MODULE_PARM_DESC(ignore_cpu_rev,
3018                         "Ignore the cpu revision when connecting to a device");
3019
3020 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
3021 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");