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
  20 #include <linux/kernel.h>
  21 #include <linux/jiffies.h>
  22 #include <linux/errno.h>
  23 #include <linux/init.h>
  24 #include <linux/slab.h>
  25 #include <linux/tty.h>
  26 #include <linux/tty_driver.h>
  27 #include <linux/tty_flip.h>
  28 #include <linux/module.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/mutex.h>
  31 #include <linux/serial.h>
  32 #include <linux/kfifo.h>
  33 #include <linux/ioctl.h>
  34 #include <linux/firmware.h>
  35 #include <linux/uaccess.h>
  36 #include <linux/usb.h>
  37 #include <linux/usb/serial.h>
  38
  39 #include "io_16654.h"
  40 #include "io_usbvend.h"
  41 #include "io_ti.h"
  42
  43 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  44 #define DRIVER_DESC "Edgeport USB Serial Driver"
  45
  46 #define EPROM_PAGE_SIZE         64
  47
  48
  49 /* different hardware types */
  50 #define HARDWARE_TYPE_930       0
  51 #define HARDWARE_TYPE_TIUMP     1
  52
  53 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
  54 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
  55 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
  56 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
  57 #define TI_MODE_TRANSITIONING   3   /* Currently in boot mode but
  58                                        transitioning to download mode      */
  59
  60 /* read urb state */
  61 #define EDGE_READ_URB_RUNNING   0
  62 #define EDGE_READ_URB_STOPPING  1
  63 #define EDGE_READ_URB_STOPPED   2
  64
  65 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
  66
  67 #define EDGE_OUT_BUF_SIZE       1024
  68
  69
  70 /* Product information read from the Edgeport */
  71 struct product_info {
  72         int     TiMode;                 /* Current TI Mode  */
  73         __u8    hardware_type;          /* Type of hardware */
  74 } __attribute__((packed));
  75
  76 struct edgeport_port {
  77         __u16 uart_base;
  78         __u16 dma_address;
  79         __u8 shadow_msr;
  80         __u8 shadow_mcr;
  81         __u8 shadow_lsr;
  82         __u8 lsr_mask;
  83         __u32 ump_read_timeout;         /* Number of milliseconds the UMP will
  84                                            wait without data before completing
  85                                            a read short */
  86         int baud_rate;
  87         int close_pending;
  88         int lsr_event;
  89         struct async_icount     icount;
  90         wait_queue_head_t       delta_msr_wait; /* for handling sleeping while
  91                                                    waiting for msr change to
  92                                                    happen */
  93         struct edgeport_serial  *edge_serial;
  94         struct usb_serial_port  *port;
  95         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
  96         spinlock_t ep_lock;
  97         int ep_read_urb_state;
  98         int ep_write_urb_in_use;
  99         struct kfifo write_fifo;
 100 };
 101
 102 struct edgeport_serial {
 103         struct product_info product_info;
 104         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
 105         u8 TiReadI2C;                   /* Set to TRUE if we have read the
 106                                            I2c in Boot Mode */
 107         struct mutex es_lock;
 108         int num_ports_open;
 109         struct usb_serial *serial;
 110 };
 111
 112
 113 /* Devices that this driver supports */
 114 static const struct usb_device_id edgeport_1port_id_table[] = {
 115         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 116         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 117         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 118         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 119         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 120         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 121         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 122         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 123         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 124         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 125         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 126         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 127         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 128         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 129         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 130         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 131         { }
 132 };
 133
 134 static const struct usb_device_id edgeport_2port_id_table[] = {
 135         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 136         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 137         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 147         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 153         { }
 154 };
 155
 156 /* Devices that this driver supports */
 157 static const struct usb_device_id id_table_combined[] = {
 158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 176         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 177         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 178         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 179         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 191         { }
 192 };
 193
 194 MODULE_DEVICE_TABLE(usb, id_table_combined);
 195
 196 static unsigned char OperationalMajorVersion;
 197 static unsigned char OperationalMinorVersion;
 198 static unsigned short OperationalBuildNumber;
 199
 200 static int closing_wait = EDGE_CLOSING_WAIT;
 201 static bool ignore_cpu_rev;
 202 static int default_uart_mode;           /* RS232 */
 203
 204 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 205                 int length);
 206
 207 static void stop_read(struct edgeport_port *edge_port);
 208 static int restart_read(struct edgeport_port *edge_port);
 209
 210 static void edge_set_termios(struct tty_struct *tty,
 211                 struct usb_serial_port *port, struct ktermios *old_termios);
 212 static void edge_send(struct tty_struct *tty);
 213
 214 /* sysfs attributes */
 215 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 216 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 217
 218
 219 static int ti_vread_sync(struct usb_device *dev, __u8 request,
 220                                 __u16 value, __u16 index, u8 *data, int size)
 221 {
 222         int status;
 223
 224         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 225                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
 226                         value, index, data, size, 1000);
 227         if (status < 0)
 228                 return status;
 229         if (status != size) {
 230                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
 231                         __func__, size, status);
 232                 return -ECOMM;
 233         }
 234         return 0;
 235 }
 236
 237 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
 238                                 __u16 value, __u16 index, u8 *data, int size)
 239 {
 240         int status;
 241
 242         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 243                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 244                         value, index, data, size, 1000);
 245         if (status < 0)
 246                 return status;
 247         if (status != size) {
 248                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
 249                         __func__, size, status);
 250                 return -ECOMM;
 251         }
 252         return 0;
 253 }
 254
 255 static int send_cmd(struct usb_device *dev, __u8 command,
 256                                 __u8 moduleid, __u16 value, u8 *data,
 257                                 int size)
 258 {
 259         return ti_vsend_sync(dev, command, value, moduleid, data, size);
 260 }
 261
 262 /* clear tx/rx buffers and fifo in TI UMP */
 263 static int purge_port(struct usb_serial_port *port, __u16 mask)
 264 {
 265         int port_number = port->number - port->serial->minor;
 266
 267         dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
 268
 269         return send_cmd(port->serial->dev,
 270                                         UMPC_PURGE_PORT,
 271                                         (__u8)(UMPM_UART1_PORT + port_number),
 272                                         mask,
 273                                         NULL,
 274                                         0);
 275 }
 276
 277 /**
 278  * read_download_mem - Read edgeport memory from TI chip
 279  * @dev: usb device pointer
 280  * @start_address: Device CPU address at which to read
 281  * @length: Length of above data
 282  * @address_type: Can read both XDATA and I2C
 283  * @buffer: pointer to input data buffer
 284  */
 285 static int read_download_mem(struct usb_device *dev, int start_address,
 286                                 int length, __u8 address_type, __u8 *buffer)
 287 {
 288         int status = 0;
 289         __u8 read_length;
 290         __be16 be_start_address;
 291
 292         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
 293
 294         /* Read in blocks of 64 bytes
 295          * (TI firmware can't handle more than 64 byte reads)
 296          */
 297         while (length) {
 298                 if (length > 64)
 299                         read_length = 64;
 300                 else
 301                         read_length = (__u8)length;
 302
 303                 if (read_length > 1) {
 304                         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
 305                 }
 306                 be_start_address = cpu_to_be16(start_address);
 307                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
 308                                         (__u16)address_type,
 309                                         (__force __u16)be_start_address,
 310                                         buffer, read_length);
 311
 312                 if (status) {
 313                         dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
 314                         return status;
 315                 }
 316
 317                 if (read_length > 1)
 318                         usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
 319
 320                 /* Update pointers/length */
 321                 start_address += read_length;
 322                 buffer += read_length;
 323                 length -= read_length;
 324         }
 325
 326         return status;
 327 }
 328
 329 static int read_ram(struct usb_device *dev, int start_address,
 330                                                 int length, __u8 *buffer)
 331 {
 332         return read_download_mem(dev, start_address, length,
 333                                         DTK_ADDR_SPACE_XDATA, buffer);
 334 }
 335
 336 /* Read edgeport memory to a given block */
 337 static int read_boot_mem(struct edgeport_serial *serial,
 338                                 int start_address, int length, __u8 *buffer)
 339 {
 340         int status = 0;
 341         int i;
 342
 343         for (i = 0; i < length; i++) {
 344                 status = ti_vread_sync(serial->serial->dev,
 345                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
 346                                 (__u16)(start_address+i), &buffer[i], 0x01);
 347                 if (status) {
 348                         dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
 349                         return status;
 350                 }
 351         }
 352
 353         dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
 354                 __func__, start_address, length);
 355         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 356
 357         serial->TiReadI2C = 1;
 358
 359         return status;
 360 }
 361
 362 /* Write given block to TI EPROM memory */
 363 static int write_boot_mem(struct edgeport_serial *serial,
 364                                 int start_address, int length, __u8 *buffer)
 365 {
 366         int status = 0;
 367         int i;
 368         u8 *temp;
 369
 370         /* Must do a read before write */
 371         if (!serial->TiReadI2C) {
 372                 temp = kmalloc(1, GFP_KERNEL);
 373                 if (!temp) {
 374                         dev_err(&serial->serial->dev->dev,
 375                                         "%s - out of memory\n", __func__);
 376                         return -ENOMEM;
 377                 }
 378                 status = read_boot_mem(serial, 0, 1, temp);
 379                 kfree(temp);
 380                 if (status)
 381                         return status;
 382         }
 383
 384         for (i = 0; i < length; ++i) {
 385                 status = ti_vsend_sync(serial->serial->dev,
 386                                 UMPC_MEMORY_WRITE, buffer[i],
 387                                 (__u16)(i + start_address), NULL, 0);
 388                 if (status)
 389                         return status;
 390         }
 391
 392         dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
 393         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 394
 395         return status;
 396 }
 397
 398
 399 /* Write edgeport I2C memory to TI chip */
 400 static int write_i2c_mem(struct edgeport_serial *serial,
 401                 int start_address, int length, __u8 address_type, __u8 *buffer)
 402 {
 403         struct device *dev = &serial->serial->dev->dev;
 404         int status = 0;
 405         int write_length;
 406         __be16 be_start_address;
 407
 408         /* We can only send a maximum of 1 aligned byte page at a time */
 409
 410         /* calculate the number of bytes left in the first page */
 411         write_length = EPROM_PAGE_SIZE -
 412                                 (start_address & (EPROM_PAGE_SIZE - 1));
 413
 414         if (write_length > length)
 415                 write_length = length;
 416
 417         dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
 418                 __func__, start_address, write_length);
 419         usb_serial_debug_data(dev, __func__, write_length, buffer);
 420
 421         /* Write first page */
 422         be_start_address = cpu_to_be16(start_address);
 423         status = ti_vsend_sync(serial->serial->dev,
 424                                 UMPC_MEMORY_WRITE, (__u16)address_type,
 425                                 (__force __u16)be_start_address,
 426                                 buffer, write_length);
 427         if (status) {
 428                 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
 429                 return status;
 430         }
 431
 432         length          -= write_length;
 433         start_address   += write_length;
 434         buffer          += write_length;
 435
 436         /* We should be aligned now -- can write
 437            max page size bytes at a time */
 438         while (length) {
 439                 if (length > EPROM_PAGE_SIZE)
 440                         write_length = EPROM_PAGE_SIZE;
 441                 else
 442                         write_length = length;
 443
 444                 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
 445                         __func__, start_address, write_length);
 446                 usb_serial_debug_data(dev, __func__, write_length, buffer);
 447
 448                 /* Write next page */
 449                 be_start_address = cpu_to_be16(start_address);
 450                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 451                                 (__u16)address_type,
 452                                 (__force __u16)be_start_address,
 453                                 buffer, write_length);
 454                 if (status) {
 455                         dev_err(dev, "%s - ERROR %d\n", __func__, status);
 456                         return status;
 457                 }
 458
 459                 length          -= write_length;
 460                 start_address   += write_length;
 461                 buffer          += write_length;
 462         }
 463         return status;
 464 }
 465
 466 /* Examine the UMP DMA registers and LSR
 467  *
 468  * Check the MSBit of the X and Y DMA byte count registers.
 469  * A zero in this bit indicates that the TX DMA buffers are empty
 470  * then check the TX Empty bit in the UART.
 471  */
 472 static int tx_active(struct edgeport_port *port)
 473 {
 474         int status;
 475         struct out_endpoint_desc_block *oedb;
 476         __u8 *lsr;
 477         int bytes_left = 0;
 478
 479         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
 480         if (!oedb) {
 481                 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
 482                 return -ENOMEM;
 483         }
 484
 485         lsr = kmalloc(1, GFP_KERNEL);   /* Sigh, that's right, just one byte,
 486                                            as not all platforms can do DMA
 487                                            from stack */
 488         if (!lsr) {
 489                 kfree(oedb);
 490                 return -ENOMEM;
 491         }
 492         /* Read the DMA Count Registers */
 493         status = read_ram(port->port->serial->dev, port->dma_address,
 494                                                 sizeof(*oedb), (void *)oedb);
 495         if (status)
 496                 goto exit_is_tx_active;
 497
 498         dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
 499
 500         /* and the LSR */
 501         status = read_ram(port->port->serial->dev,
 502                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
 503
 504         if (status)
 505                 goto exit_is_tx_active;
 506         dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
 507
 508         /* If either buffer has data or we are transmitting then return TRUE */
 509         if ((oedb->XByteCount & 0x80) != 0)
 510                 bytes_left += 64;
 511
 512         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
 513                 bytes_left += 1;
 514
 515         /* We return Not Active if we get any kind of error */
 516 exit_is_tx_active:
 517         dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
 518
 519         kfree(lsr);
 520         kfree(oedb);
 521         return bytes_left;
 522 }
 523
 524 static void chase_port(struct edgeport_port *port, unsigned long timeout,
 525                                                                 int flush)
 526 {
 527         int baud_rate;
 528         struct tty_struct *tty = tty_port_tty_get(&port->port->port);
 529         struct usb_serial *serial = port->port->serial;
 530         wait_queue_t wait;
 531         unsigned long flags;
 532
 533         if (!tty)
 534                 return;
 535
 536         if (!timeout)
 537                 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
 538
 539         /* wait for data to drain from the buffer */
 540         spin_lock_irqsave(&port->ep_lock, flags);
 541         init_waitqueue_entry(&wait, current);
 542         add_wait_queue(&tty->write_wait, &wait);
 543         for (;;) {
 544                 set_current_state(TASK_INTERRUPTIBLE);
 545                 if (kfifo_len(&port->write_fifo) == 0
 546                 || timeout == 0 || signal_pending(current)
 547                 || serial->disconnected)
 548                         /* disconnect */
 549                         break;
 550                 spin_unlock_irqrestore(&port->ep_lock, flags);
 551                 timeout = schedule_timeout(timeout);
 552                 spin_lock_irqsave(&port->ep_lock, flags);
 553         }
 554         set_current_state(TASK_RUNNING);
 555         remove_wait_queue(&tty->write_wait, &wait);
 556         if (flush)
 557                 kfifo_reset_out(&port->write_fifo);
 558         spin_unlock_irqrestore(&port->ep_lock, flags);
 559         tty_kref_put(tty);
 560
 561         /* wait for data to drain from the device */
 562         timeout += jiffies;
 563         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
 564                                                 && !serial->disconnected) {
 565                 /* not disconnected */
 566                 if (!tx_active(port))
 567                         break;
 568                 msleep(10);
 569         }
 570
 571         /* disconnected */
 572         if (serial->disconnected)
 573                 return;
 574
 575         /* wait one more character time, based on baud rate */
 576         /* (tx_active doesn't seem to wait for the last byte) */
 577         baud_rate = port->baud_rate;
 578         if (baud_rate == 0)
 579                 baud_rate = 50;
 580         msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
 581 }
 582
 583 static int choose_config(struct usb_device *dev)
 584 {
 585         /*
 586          * There may be multiple configurations on this device, in which case
 587          * we would need to read and parse all of them to find out which one
 588          * we want. However, we just support one config at this point,
 589          * configuration # 1, which is Config Descriptor 0.
 590          */
 591
 592         dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
 593                 __func__, dev->config->desc.bNumInterfaces);
 594         dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
 595                 __func__, dev->config->desc.bMaxPower * 2);
 596
 597         if (dev->config->desc.bNumInterfaces != 1) {
 598                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
 599                 return -ENODEV;
 600         }
 601
 602         return 0;
 603 }
 604
 605 static int read_rom(struct edgeport_serial *serial,
 606                                 int start_address, int length, __u8 *buffer)
 607 {
 608         int status;
 609
 610         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 611                 status = read_download_mem(serial->serial->dev,
 612                                                start_address,
 613                                                length,
 614                                                serial->TI_I2C_Type,
 615                                                buffer);
 616         } else {
 617                 status = read_boot_mem(serial, start_address, length,
 618                                                                 buffer);
 619         }
 620         return status;
 621 }
 622
 623 static int write_rom(struct edgeport_serial *serial, int start_address,
 624                                                 int length, __u8 *buffer)
 625 {
 626         if (serial->product_info.TiMode == TI_MODE_BOOT)
 627                 return write_boot_mem(serial, start_address, length,
 628                                                                 buffer);
 629
 630         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 631                 return write_i2c_mem(serial, start_address, length,
 632                                                 serial->TI_I2C_Type, buffer);
 633         return -EINVAL;
 634 }
 635
 636
 637
 638 /* Read a descriptor header from I2C based on type */
 639 static int get_descriptor_addr(struct edgeport_serial *serial,
 640                                 int desc_type, struct ti_i2c_desc *rom_desc)
 641 {
 642         int start_address;
 643         int status;
 644
 645         /* Search for requested descriptor in I2C */
 646         start_address = 2;
 647         do {
 648                 status = read_rom(serial,
 649                                    start_address,
 650                                    sizeof(struct ti_i2c_desc),
 651                                    (__u8 *)rom_desc);
 652                 if (status)
 653                         return 0;
 654
 655                 if (rom_desc->Type == desc_type)
 656                         return start_address;
 657
 658                 start_address = start_address + sizeof(struct ti_i2c_desc)
 659                                                         + rom_desc->Size;
 660
 661         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 662
 663         return 0;
 664 }
 665
 666 /* Validate descriptor checksum */
 667 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 668 {
 669         __u16 i;
 670         __u8 cs = 0;
 671
 672         for (i = 0; i < rom_desc->Size; i++)
 673                 cs = (__u8)(cs + buffer[i]);
 674
 675         if (cs != rom_desc->CheckSum) {
 676                 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 677                 return -EINVAL;
 678         }
 679         return 0;
 680 }
 681
 682 /* Make sure that the I2C image is good */
 683 static int check_i2c_image(struct edgeport_serial *serial)
 684 {
 685         struct device *dev = &serial->serial->dev->dev;
 686         int status = 0;
 687         struct ti_i2c_desc *rom_desc;
 688         int start_address = 2;
 689         __u8 *buffer;
 690         __u16 ttype;
 691
 692         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 693         if (!rom_desc) {
 694                 dev_err(dev, "%s - out of memory\n", __func__);
 695                 return -ENOMEM;
 696         }
 697         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 698         if (!buffer) {
 699                 dev_err(dev, "%s - out of memory when allocating buffer\n",
 700                                                                 __func__);
 701                 kfree(rom_desc);
 702                 return -ENOMEM;
 703         }
 704
 705         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 706         status = read_rom(serial, 0, 1, buffer);
 707         if (status)
 708                 goto out;
 709
 710         if (*buffer != UMP5152 && *buffer != UMP3410) {
 711                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 712                 status = -ENODEV;
 713                 goto out;
 714         }
 715
 716         do {
 717                 /* Validate the I2C */
 718                 status = read_rom(serial,
 719                                 start_address,
 720                                 sizeof(struct ti_i2c_desc),
 721                                 (__u8 *)rom_desc);
 722                 if (status)
 723                         break;
 724
 725                 if ((start_address + sizeof(struct ti_i2c_desc) +
 726                                         rom_desc->Size) > TI_MAX_I2C_SIZE) {
 727                         status = -ENODEV;
 728                         dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
 729                         break;
 730                 }
 731
 732                 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
 733
 734                 /* Skip type 2 record */
 735                 ttype = rom_desc->Type & 0x0f;
 736                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 737                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 738                         /* Read the descriptor data */
 739                         status = read_rom(serial, start_address +
 740                                                 sizeof(struct ti_i2c_desc),
 741                                                 rom_desc->Size, buffer);
 742                         if (status)
 743                                 break;
 744
 745                         status = valid_csum(rom_desc, buffer);
 746                         if (status)
 747                                 break;
 748                 }
 749                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 750                                                                 rom_desc->Size;
 751
 752         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 753                                 (start_address < TI_MAX_I2C_SIZE));
 754
 755         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 756                                 (start_address > TI_MAX_I2C_SIZE))
 757                 status = -ENODEV;
 758
 759 out:
 760         kfree(buffer);
 761         kfree(rom_desc);
 762         return status;
 763 }
 764
 765 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
 766 {
 767         int status;
 768         int start_address;
 769         struct ti_i2c_desc *rom_desc;
 770         struct edge_ti_manuf_descriptor *desc;
 771         struct device *dev = &serial->serial->dev->dev;
 772
 773         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 774         if (!rom_desc) {
 775                 dev_err(dev, "%s - out of memory\n", __func__);
 776                 return -ENOMEM;
 777         }
 778         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 779                                                                 rom_desc);
 780
 781         if (!start_address) {
 782                 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
 783                 status = -ENODEV;
 784                 goto exit;
 785         }
 786
 787         /* Read the descriptor data */
 788         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 789                                                 rom_desc->Size, buffer);
 790         if (status)
 791                 goto exit;
 792
 793         status = valid_csum(rom_desc, buffer);
 794
 795         desc = (struct edge_ti_manuf_descriptor *)buffer;
 796         dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
 797         dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
 798         dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
 799         dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
 800         dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
 801         dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
 802
 803 exit:
 804         kfree(rom_desc);
 805         return status;
 806 }
 807
 808 /* Build firmware header used for firmware update */
 809 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
 810 {
 811         __u8 *buffer;
 812         int buffer_size;
 813         int i;
 814         int err;
 815         __u8 cs = 0;
 816         struct ti_i2c_desc *i2c_header;
 817         struct ti_i2c_image_header *img_header;
 818         struct ti_i2c_firmware_rec *firmware_rec;
 819         const struct firmware *fw;
 820         const char *fw_name = "edgeport/down3.bin";
 821
 822         /* In order to update the I2C firmware we must change the type 2 record
 823          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 824          * Then while in boot mode, the driver will download the latest
 825          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 826          * device comes back up in download mode the driver will cause the new
 827          * firmware to be copied from the UMP Ram to I2C and the firmware will
 828          * update the record type from 0xf2 to 0x02.
 829          */
 830
 831         /* Allocate a 15.5k buffer + 2 bytes for version number
 832          * (Firmware Record) */
 833         buffer_size = (((1024 * 16) - 512 ) +
 834                         sizeof(struct ti_i2c_firmware_rec));
 835
 836         buffer = kmalloc(buffer_size, GFP_KERNEL);
 837         if (!buffer) {
 838                 dev_err(dev, "%s - out of memory\n", __func__);
 839                 return -ENOMEM;
 840         }
 841
 842         // Set entire image of 0xffs
 843         memset(buffer, 0xff, buffer_size);
 844
 845         err = request_firmware(&fw, fw_name, dev);
 846         if (err) {
 847                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
 848                         fw_name, err);
 849                 kfree(buffer);
 850                 return err;
 851         }
 852
 853         /* Save Download Version Number */
 854         OperationalMajorVersion = fw->data[0];
 855         OperationalMinorVersion = fw->data[1];
 856         OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
 857
 858         /* Copy version number into firmware record */
 859         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 860
 861         firmware_rec->Ver_Major = OperationalMajorVersion;
 862         firmware_rec->Ver_Minor = OperationalMinorVersion;
 863
 864         /* Pointer to fw_down memory image */
 865         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 866
 867         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 868                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 869                 le16_to_cpu(img_header->Length));
 870
 871         release_firmware(fw);
 872
 873         for (i=0; i < buffer_size; i++) {
 874                 cs = (__u8)(cs + buffer[i]);
 875         }
 876
 877         kfree(buffer);
 878
 879         /* Build new header */
 880         i2c_header =  (struct ti_i2c_desc *)header;
 881         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 882
 883         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 884         i2c_header->Size        = (__u16)buffer_size;
 885         i2c_header->CheckSum    = cs;
 886         firmware_rec->Ver_Major = OperationalMajorVersion;
 887         firmware_rec->Ver_Minor = OperationalMinorVersion;
 888
 889         return 0;
 890 }
 891
 892 /* Try to figure out what type of I2c we have */
 893 static int i2c_type_bootmode(struct edgeport_serial *serial)
 894 {
 895         struct device *dev = &serial->serial->dev->dev;
 896         int status;
 897         u8 *data;
 898
 899         data = kmalloc(1, GFP_KERNEL);
 900         if (!data) {
 901                 dev_err(dev, "%s - out of memory\n", __func__);
 902                 return -ENOMEM;
 903         }
 904
 905         /* Try to read type 2 */
 906         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 907                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
 908         if (status)
 909                 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
 910         else
 911                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 912         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 913                 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
 914                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 915                 goto out;
 916         }
 917
 918         /* Try to read type 3 */
 919         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 920                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
 921         if (status)
 922                 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
 923         else
 924                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 925         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 926                 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
 927                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 928                 goto out;
 929         }
 930
 931         dev_dbg(dev, "%s - Unknown\n", __func__);
 932         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 933         status = -ENODEV;
 934 out:
 935         kfree(data);
 936         return status;
 937 }
 938
 939 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 940                                                 int length, int *num_sent)
 941 {
 942         int status;
 943
 944         status = usb_bulk_msg(serial->dev,
 945                         usb_sndbulkpipe(serial->dev,
 946                                 serial->port[0]->bulk_out_endpointAddress),
 947                         buffer, length, num_sent, 1000);
 948         return status;
 949 }
 950
 951 /* Download given firmware image to the device (IN BOOT MODE) */
 952 static int download_code(struct edgeport_serial *serial, __u8 *image,
 953                                                         int image_length)
 954 {
 955         int status = 0;
 956         int pos;
 957         int transfer;
 958         int done;
 959
 960         /* Transfer firmware image */
 961         for (pos = 0; pos < image_length; ) {
 962                 /* Read the next buffer from file */
 963                 transfer = image_length - pos;
 964                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 965                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
 966
 967                 /* Transfer data */
 968                 status = bulk_xfer(serial->serial, &image[pos],
 969                                                         transfer, &done);
 970                 if (status)
 971                         break;
 972                 /* Advance buffer pointer */
 973                 pos += done;
 974         }
 975
 976         return status;
 977 }
 978
 979 /* FIXME!!! */
 980 static int config_boot_dev(struct usb_device *dev)
 981 {
 982         return 0;
 983 }
 984
 985 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
 986 {
 987         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
 988 }
 989
 990 /**
 991  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
 992  *
 993  * This routine downloads the main operating code into the TI5052, using the
 994  * boot code already burned into E2PROM or ROM.
 995  */
 996 static int download_fw(struct edgeport_serial *serial)
 997 {
 998         struct device *dev = &serial->serial->dev->dev;
 999         int status = 0;
1000         int start_address;
1001         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1002         struct usb_interface_descriptor *interface;
1003         int download_cur_ver;
1004         int download_new_ver;
1005
1006         /* This routine is entered by both the BOOT mode and the Download mode
1007          * We can determine which code is running by the reading the config
1008          * descriptor and if we have only one bulk pipe it is in boot mode
1009          */
1010         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1011
1012         /* Default to type 2 i2c */
1013         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1014
1015         status = choose_config(serial->serial->dev);
1016         if (status)
1017                 return status;
1018
1019         interface = &serial->serial->interface->cur_altsetting->desc;
1020         if (!interface) {
1021                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1022                 return -ENODEV;
1023         }
1024
1025         /*
1026          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1027          * if we have more than one endpoint we are definitely in download
1028          * mode
1029          */
1030         if (interface->bNumEndpoints > 1)
1031                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1032         else
1033                 /* Otherwise we will remain in configuring mode */
1034                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1035
1036         /********************************************************************/
1037         /* Download Mode */
1038         /********************************************************************/
1039         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1040                 struct ti_i2c_desc *rom_desc;
1041
1042                 dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1043
1044                 status = check_i2c_image(serial);
1045                 if (status) {
1046                         dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1047                         return status;
1048                 }
1049
1050                 /* Validate Hardware version number
1051                  * Read Manufacturing Descriptor from TI Based Edgeport
1052                  */
1053                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1054                 if (!ti_manuf_desc) {
1055                         dev_err(dev, "%s - out of memory.\n", __func__);
1056                         return -ENOMEM;
1057                 }
1058                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1059                 if (status) {
1060                         kfree(ti_manuf_desc);
1061                         return status;
1062                 }
1063
1064                 /* Check version number of ION descriptor */
1065                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1066                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1067                                 __func__, ti_cpu_rev(ti_manuf_desc));
1068                         kfree(ti_manuf_desc);
1069                         return -EINVAL;
1070                 }
1071
1072                 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1073                 if (!rom_desc) {
1074                         dev_err(dev, "%s - out of memory.\n", __func__);
1075                         kfree(ti_manuf_desc);
1076                         return -ENOMEM;
1077                 }
1078
1079                 /* Search for type 2 record (firmware record) */
1080                 start_address = get_descriptor_addr(serial,
1081                                 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1082                 if (start_address != 0) {
1083                         struct ti_i2c_firmware_rec *firmware_version;
1084                         u8 *record;
1085
1086                         dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n", __func__);
1087
1088                         firmware_version = kmalloc(sizeof(*firmware_version),
1089                                                                 GFP_KERNEL);
1090                         if (!firmware_version) {
1091                                 dev_err(dev, "%s - out of memory.\n", __func__);
1092                                 kfree(rom_desc);
1093                                 kfree(ti_manuf_desc);
1094                                 return -ENOMEM;
1095                         }
1096
1097                         /* Validate version number
1098                          * Read the descriptor data
1099                          */
1100                         status = read_rom(serial, start_address +
1101                                         sizeof(struct ti_i2c_desc),
1102                                         sizeof(struct ti_i2c_firmware_rec),
1103                                         (__u8 *)firmware_version);
1104                         if (status) {
1105                                 kfree(firmware_version);
1106                                 kfree(rom_desc);
1107                                 kfree(ti_manuf_desc);
1108                                 return status;
1109                         }
1110
1111                         /* Check version number of download with current
1112                            version in I2c */
1113                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1114                                            (firmware_version->Ver_Minor);
1115                         download_new_ver = (OperationalMajorVersion << 8) +
1116                                            (OperationalMinorVersion);
1117
1118                         dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1119                                 __func__, firmware_version->Ver_Major,
1120                                 firmware_version->Ver_Minor,
1121                                 OperationalMajorVersion,
1122                                 OperationalMinorVersion);
1123
1124                         /* Check if we have an old version in the I2C and
1125                            update if necessary */
1126                         if (download_cur_ver < download_new_ver) {
1127                                 dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1128                                         __func__,
1129                                         firmware_version->Ver_Major,
1130                                         firmware_version->Ver_Minor,
1131                                         OperationalMajorVersion,
1132                                         OperationalMinorVersion);
1133
1134                                 record = kmalloc(1, GFP_KERNEL);
1135                                 if (!record) {
1136                                         dev_err(dev, "%s - out of memory.\n",
1137                                                         __func__);
1138                                         kfree(firmware_version);
1139                                         kfree(rom_desc);
1140                                         kfree(ti_manuf_desc);
1141                                         return -ENOMEM;
1142                                 }
1143                                 /* In order to update the I2C firmware we must
1144                                  * change the type 2 record to type 0xF2. This
1145                                  * will force the UMP to come up in Boot Mode.
1146                                  * Then while in boot mode, the driver will
1147                                  * download the latest firmware (padded to
1148                                  * 15.5k) into the UMP ram. Finally when the
1149                                  * device comes back up in download mode the
1150                                  * driver will cause the new firmware to be
1151                                  * copied from the UMP Ram to I2C and the
1152                                  * firmware will update the record type from
1153                                  * 0xf2 to 0x02.
1154                                  */
1155                                 *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1156
1157                                 /* Change the I2C Firmware record type to
1158                                    0xf2 to trigger an update */
1159                                 status = write_rom(serial, start_address,
1160                                                 sizeof(*record), record);
1161                                 if (status) {
1162                                         kfree(record);
1163                                         kfree(firmware_version);
1164                                         kfree(rom_desc);
1165                                         kfree(ti_manuf_desc);
1166                                         return status;
1167                                 }
1168
1169                                 /* verify the write -- must do this in order
1170                                  * for write to complete before we do the
1171                                  * hardware reset
1172                                  */
1173                                 status = read_rom(serial,
1174                                                         start_address,
1175                                                         sizeof(*record),
1176                                                         record);
1177                                 if (status) {
1178                                         kfree(record);
1179                                         kfree(firmware_version);
1180                                         kfree(rom_desc);
1181                                         kfree(ti_manuf_desc);
1182                                         return status;
1183                                 }
1184
1185                                 if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1186                                         dev_err(dev, "%s - error resetting device\n", __func__);
1187                                         kfree(record);
1188                                         kfree(firmware_version);
1189                                         kfree(rom_desc);
1190                                         kfree(ti_manuf_desc);
1191                                         return -ENODEV;
1192                                 }
1193
1194                                 dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1195
1196                                 /* Reset UMP -- Back to BOOT MODE */
1197                                 status = ti_vsend_sync(serial->serial->dev,
1198                                                 UMPC_HARDWARE_RESET,
1199                                                 0, 0, NULL, 0);
1200
1201                                 dev_dbg(dev, "%s - HARDWARE RESET return %d\n", __func__, status);
1202
1203                                 /* return an error on purpose. */
1204                                 kfree(record);
1205                                 kfree(firmware_version);
1206                                 kfree(rom_desc);
1207                                 kfree(ti_manuf_desc);
1208                                 return -ENODEV;
1209                         }
1210                         kfree(firmware_version);
1211                 }
1212                 /* Search for type 0xF2 record (firmware blank record) */
1213                 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1214 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1215                                         sizeof(struct ti_i2c_firmware_rec))
1216                         __u8 *header;
1217                         __u8 *vheader;
1218
1219                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1220                         if (!header) {
1221                                 dev_err(dev, "%s - out of memory.\n", __func__);
1222                                 kfree(rom_desc);
1223                                 kfree(ti_manuf_desc);
1224                                 return -ENOMEM;
1225                         }
1226
1227                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1228                         if (!vheader) {
1229                                 dev_err(dev, "%s - out of memory.\n", __func__);
1230                                 kfree(header);
1231                                 kfree(rom_desc);
1232                                 kfree(ti_manuf_desc);
1233                                 return -ENOMEM;
1234                         }
1235
1236                         dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n", __func__);
1237
1238                         /*
1239                          * In order to update the I2C firmware we must change
1240                          * the type 2 record to type 0xF2. This will force the
1241                          * UMP to come up in Boot Mode.  Then while in boot
1242                          * mode, the driver will download the latest firmware
1243                          * (padded to 15.5k) into the UMP ram. Finally when the
1244                          * device comes back up in download mode the driver
1245                          * will cause the new firmware to be copied from the
1246                          * UMP Ram to I2C and the firmware will update the
1247                          * record type from 0xf2 to 0x02.
1248                          */
1249                         status = build_i2c_fw_hdr(header, dev);
1250                         if (status) {
1251                                 kfree(vheader);
1252                                 kfree(header);
1253                                 kfree(rom_desc);
1254                                 kfree(ti_manuf_desc);
1255                                 return -EINVAL;
1256                         }
1257
1258                         /* Update I2C with type 0xf2 record with correct
1259                            size and checksum */
1260                         status = write_rom(serial,
1261                                                 start_address,
1262                                                 HEADER_SIZE,
1263                                                 header);
1264                         if (status) {
1265                                 kfree(vheader);
1266                                 kfree(header);
1267                                 kfree(rom_desc);
1268                                 kfree(ti_manuf_desc);
1269                                 return -EINVAL;
1270                         }
1271
1272                         /* verify the write -- must do this in order for
1273                            write to complete before we do the hardware reset */
1274                         status = read_rom(serial, start_address,
1275                                                         HEADER_SIZE, vheader);
1276
1277                         if (status) {
1278                                 dev_dbg(dev, "%s - can't read header back\n", __func__);
1279                                 kfree(vheader);
1280                                 kfree(header);
1281                                 kfree(rom_desc);
1282                                 kfree(ti_manuf_desc);
1283                                 return status;
1284                         }
1285                         if (memcmp(vheader, header, HEADER_SIZE)) {
1286                                 dev_dbg(dev, "%s - write download record failed\n", __func__);
1287                                 kfree(vheader);
1288                                 kfree(header);
1289                                 kfree(rom_desc);
1290                                 kfree(ti_manuf_desc);
1291                                 return -EINVAL;
1292                         }
1293
1294                         kfree(vheader);
1295                         kfree(header);
1296
1297                         dev_dbg(dev, "%s - Start firmware update\n", __func__);
1298
1299                         /* Tell firmware to copy download image into I2C */
1300                         status = ti_vsend_sync(serial->serial->dev,
1301                                         UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1302
1303                         dev_dbg(dev, "%s - Update complete 0x%x\n", __func__, status);
1304                         if (status) {
1305                                 dev_err(dev,
1306                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1307                                                                 __func__);
1308                                 kfree(rom_desc);
1309                                 kfree(ti_manuf_desc);
1310                                 return status;
1311                         }
1312                 }
1313
1314                 // The device is running the download code
1315                 kfree(rom_desc);
1316                 kfree(ti_manuf_desc);
1317                 return 0;
1318         }
1319
1320         /********************************************************************/
1321         /* Boot Mode */
1322         /********************************************************************/
1323         dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1324
1325         /* Configure the TI device so we can use the BULK pipes for download */
1326         status = config_boot_dev(serial->serial->dev);
1327         if (status)
1328                 return status;
1329
1330         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1331                                                         != USB_VENDOR_ID_ION) {
1332                 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1333                         le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1334                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1335                 goto stayinbootmode;
1336         }
1337
1338         /* We have an ION device (I2c Must be programmed)
1339            Determine I2C image type */
1340         if (i2c_type_bootmode(serial))
1341                 goto stayinbootmode;
1342
1343         /* Check for ION Vendor ID and that the I2C is valid */
1344         if (!check_i2c_image(serial)) {
1345                 struct ti_i2c_image_header *header;
1346                 int i;
1347                 __u8 cs = 0;
1348                 __u8 *buffer;
1349                 int buffer_size;
1350                 int err;
1351                 const struct firmware *fw;
1352                 const char *fw_name = "edgeport/down3.bin";
1353
1354                 /* Validate Hardware version number
1355                  * Read Manufacturing Descriptor from TI Based Edgeport
1356                  */
1357                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1358                 if (!ti_manuf_desc) {
1359                         dev_err(dev, "%s - out of memory.\n", __func__);
1360                         return -ENOMEM;
1361                 }
1362                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1363                 if (status) {
1364                         kfree(ti_manuf_desc);
1365                         goto stayinbootmode;
1366                 }
1367
1368                 /* Check for version 2 */
1369                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1370                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1371                                 __func__, ti_cpu_rev(ti_manuf_desc));
1372                         kfree(ti_manuf_desc);
1373                         goto stayinbootmode;
1374                 }
1375
1376                 kfree(ti_manuf_desc);
1377
1378                 /*
1379                  * In order to update the I2C firmware we must change the type
1380                  * 2 record to type 0xF2. This will force the UMP to come up
1381                  * in Boot Mode.  Then while in boot mode, the driver will
1382                  * download the latest firmware (padded to 15.5k) into the
1383                  * UMP ram. Finally when the device comes back up in download
1384                  * mode the driver will cause the new firmware to be copied
1385                  * from the UMP Ram to I2C and the firmware will update the
1386                  * record type from 0xf2 to 0x02.
1387                  *
1388                  * Do we really have to copy the whole firmware image,
1389                  * or could we do this in place!
1390                  */
1391
1392                 /* Allocate a 15.5k buffer + 3 byte header */
1393                 buffer_size = (((1024 * 16) - 512) +
1394                                         sizeof(struct ti_i2c_image_header));
1395                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1396                 if (!buffer) {
1397                         dev_err(dev, "%s - out of memory\n", __func__);
1398                         return -ENOMEM;
1399                 }
1400
1401                 /* Initialize the buffer to 0xff (pad the buffer) */
1402                 memset(buffer, 0xff, buffer_size);
1403
1404                 err = request_firmware(&fw, fw_name, dev);
1405                 if (err) {
1406                         dev_err(dev, "Failed to load image \"%s\" err %d\n",
1407                                 fw_name, err);
1408                         kfree(buffer);
1409                         return err;
1410                 }
1411                 memcpy(buffer, &fw->data[4], fw->size - 4);
1412                 release_firmware(fw);
1413
1414                 for (i = sizeof(struct ti_i2c_image_header);
1415                                 i < buffer_size; i++) {
1416                         cs = (__u8)(cs + buffer[i]);
1417                 }
1418
1419                 header = (struct ti_i2c_image_header *)buffer;
1420
1421                 /* update length and checksum after padding */
1422                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1423                                         sizeof(struct ti_i2c_image_header)));
1424                 header->CheckSum = cs;
1425
1426                 /* Download the operational code  */
1427                 dev_dbg(dev, "%s - Downloading operational code image (TI UMP)\n", __func__);
1428                 status = download_code(serial, buffer, buffer_size);
1429
1430                 kfree(buffer);
1431
1432                 if (status) {
1433                         dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1434                         return status;
1435                 }
1436
1437                 /* Device will reboot */
1438                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1439
1440                 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1441
1442                 /* return an error on purpose */
1443                 return -ENODEV;
1444         }
1445
1446 stayinbootmode:
1447         /* Eprom is invalid or blank stay in boot mode */
1448         dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1449         serial->product_info.TiMode = TI_MODE_BOOT;
1450
1451         return 0;
1452 }
1453
1454
1455 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1456 {
1457         int port_number = port->port->number - port->port->serial->minor;
1458         on = !!on;      /* 1 or 0 not bitmask */
1459         return send_cmd(port->port->serial->dev,
1460                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1461                         on, NULL, 0);
1462 }
1463
1464
1465 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1466 {
1467         int status = 0;
1468
1469         dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1470
1471         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1472         if (status)
1473                 return status;
1474         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1475         if (status)
1476                 return status;
1477         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1478 }
1479
1480 /* Convert TI LSR to standard UART flags */
1481 static __u8 map_line_status(__u8 ti_lsr)
1482 {
1483         __u8 lsr = 0;
1484
1485 #define MAP_FLAG(flagUmp, flagUart)    \
1486         if (ti_lsr & flagUmp) \
1487                 lsr |= flagUart;
1488
1489         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1490         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1491         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1492         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1493         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1494         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1495
1496 #undef MAP_FLAG
1497
1498         return lsr;
1499 }
1500
1501 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1502 {
1503         struct async_icount *icount;
1504         struct tty_struct *tty;
1505
1506         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1507
1508         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1509                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1510                 icount = &edge_port->icount;
1511
1512                 /* update input line counters */
1513                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1514                         icount->cts++;
1515                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1516                         icount->dsr++;
1517                 if (msr & EDGEPORT_MSR_DELTA_CD)
1518                         icount->dcd++;
1519                 if (msr & EDGEPORT_MSR_DELTA_RI)
1520                         icount->rng++;
1521                 wake_up_interruptible(&edge_port->delta_msr_wait);
1522         }
1523
1524         /* Save the new modem status */
1525         edge_port->shadow_msr = msr & 0xf0;
1526
1527         tty = tty_port_tty_get(&edge_port->port->port);
1528         /* handle CTS flow control */
1529         if (tty && C_CRTSCTS(tty)) {
1530                 if (msr & EDGEPORT_MSR_CTS) {
1531                         tty->hw_stopped = 0;
1532                         tty_wakeup(tty);
1533                 } else {
1534                         tty->hw_stopped = 1;
1535                 }
1536         }
1537         tty_kref_put(tty);
1538 }
1539
1540 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1541                                                         __u8 lsr, __u8 data)
1542 {
1543         struct async_icount *icount;
1544         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1545                                                 LSR_FRM_ERR | LSR_BREAK));
1546
1547         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1548
1549         edge_port->shadow_lsr = lsr;
1550
1551         if (new_lsr & LSR_BREAK)
1552                 /*
1553                  * Parity and Framing errors only count if they
1554                  * occur exclusive of a break being received.
1555                  */
1556                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1557
1558         /* Place LSR data byte into Rx buffer */
1559         if (lsr_data)
1560                 edge_tty_recv(edge_port->port, &data, 1);
1561
1562         /* update input line counters */
1563         icount = &edge_port->icount;
1564         if (new_lsr & LSR_BREAK)
1565                 icount->brk++;
1566         if (new_lsr & LSR_OVER_ERR)
1567                 icount->overrun++;
1568         if (new_lsr & LSR_PAR_ERR)
1569                 icount->parity++;
1570         if (new_lsr & LSR_FRM_ERR)
1571                 icount->frame++;
1572 }
1573
1574
1575 static void edge_interrupt_callback(struct urb *urb)
1576 {
1577         struct edgeport_serial *edge_serial = urb->context;
1578         struct usb_serial_port *port;
1579         struct edgeport_port *edge_port;
1580         struct device *dev;
1581         unsigned char *data = urb->transfer_buffer;
1582         int length = urb->actual_length;
1583         int port_number;
1584         int function;
1585         int retval;
1586         __u8 lsr;
1587         __u8 msr;
1588         int status = urb->status;
1589
1590         switch (status) {
1591         case 0:
1592                 /* success */
1593                 break;
1594         case -ECONNRESET:
1595         case -ENOENT:
1596         case -ESHUTDOWN:
1597                 /* this urb is terminated, clean up */
1598                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1599                     __func__, status);
1600                 return;
1601         default:
1602                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1603                         "%d\n", __func__, status);
1604                 goto exit;
1605         }
1606
1607         if (!length) {
1608                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1609                 goto exit;
1610         }
1611
1612         dev = &edge_serial->serial->dev->dev;
1613         usb_serial_debug_data(dev, __func__, length, data);
1614
1615         if (length != 2) {
1616                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1617                 goto exit;
1618         }
1619
1620         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1621         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1622         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1623                 port_number, function, data[1]);
1624         port = edge_serial->serial->port[port_number];
1625         edge_port = usb_get_serial_port_data(port);
1626         if (!edge_port) {
1627                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1628                 return;
1629         }
1630         switch (function) {
1631         case TIUMP_INTERRUPT_CODE_LSR:
1632                 lsr = map_line_status(data[1]);
1633                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1634                         /* Save the LSR event for bulk read
1635                            completion routine */
1636                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1637                                 __func__, port_number, lsr);
1638                         edge_port->lsr_event = 1;
1639                         edge_port->lsr_mask = lsr;
1640                 } else {
1641                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1642                                 __func__, port_number, lsr);
1643                         handle_new_lsr(edge_port, 0, lsr, 0);
1644                 }
1645                 break;
1646
1647         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1648                 /* Copy MSR from UMP */
1649                 msr = data[1];
1650                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1651                         __func__, port_number, msr);
1652                 handle_new_msr(edge_port, msr);
1653                 break;
1654
1655         default:
1656                 dev_err(&urb->dev->dev,
1657                         "%s - Unknown Interrupt code from UMP %x\n",
1658                         __func__, data[1]);
1659                 break;
1660
1661         }
1662
1663 exit:
1664         retval = usb_submit_urb(urb, GFP_ATOMIC);
1665         if (retval)
1666                 dev_err(&urb->dev->dev,
1667                         "%s - usb_submit_urb failed with result %d\n",
1668                          __func__, retval);
1669 }
1670
1671 static void edge_bulk_in_callback(struct urb *urb)
1672 {
1673         struct edgeport_port *edge_port = urb->context;
1674         struct device *dev = &edge_port->port->dev;
1675         unsigned char *data = urb->transfer_buffer;
1676         int retval = 0;
1677         int port_number;
1678         int status = urb->status;
1679
1680         switch (status) {
1681         case 0:
1682                 /* success */
1683                 break;
1684         case -ECONNRESET:
1685         case -ENOENT:
1686         case -ESHUTDOWN:
1687                 /* this urb is terminated, clean up */
1688                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1689                 return;
1690         default:
1691                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1692         }
1693
1694         if (status == -EPIPE)
1695                 goto exit;
1696
1697         if (status) {
1698                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1699                 return;
1700         }
1701
1702         port_number = edge_port->port->number - edge_port->port->serial->minor;
1703
1704         if (edge_port->lsr_event) {
1705                 edge_port->lsr_event = 0;
1706                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1707                         __func__, port_number, edge_port->lsr_mask, *data);
1708                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1709                 /* Adjust buffer length/pointer */
1710                 --urb->actual_length;
1711                 ++data;
1712         }
1713
1714         if (urb->actual_length) {
1715                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1716                 if (edge_port->close_pending)
1717                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1718                                                                 __func__);
1719                 else
1720                         edge_tty_recv(edge_port->port, data,
1721                                         urb->actual_length);
1722                 edge_port->icount.rx += urb->actual_length;
1723         }
1724
1725 exit:
1726         /* continue read unless stopped */
1727         spin_lock(&edge_port->ep_lock);
1728         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1729                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1730         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1731                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1732
1733         spin_unlock(&edge_port->ep_lock);
1734         if (retval)
1735                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1736 }
1737
1738 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1739                 int length)
1740 {
1741         int queued;
1742
1743         queued = tty_insert_flip_string(&port->port, data, length);
1744         if (queued < length)
1745                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1746                         __func__, length - queued);
1747         tty_flip_buffer_push(&port->port);
1748 }
1749
1750 static void edge_bulk_out_callback(struct urb *urb)
1751 {
1752         struct usb_serial_port *port = urb->context;
1753         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1754         int status = urb->status;
1755         struct tty_struct *tty;
1756
1757         edge_port->ep_write_urb_in_use = 0;
1758
1759         switch (status) {
1760         case 0:
1761                 /* success */
1762                 break;
1763         case -ECONNRESET:
1764         case -ENOENT:
1765         case -ESHUTDOWN:
1766                 /* this urb is terminated, clean up */
1767                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1768                     __func__, status);
1769                 return;
1770         default:
1771                 dev_err_console(port, "%s - nonzero write bulk status "
1772                         "received: %d\n", __func__, status);
1773         }
1774
1775         /* send any buffered data */
1776         tty = tty_port_tty_get(&port->port);
1777         edge_send(tty);
1778         tty_kref_put(tty);
1779 }
1780
1781 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1782 {
1783         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1784         struct edgeport_serial *edge_serial;
1785         struct usb_device *dev;
1786         struct urb *urb;
1787         int port_number;
1788         int status;
1789         u16 open_settings;
1790         u8 transaction_timeout;
1791
1792         if (edge_port == NULL)
1793                 return -ENODEV;
1794
1795         port_number = port->number - port->serial->minor;
1796         switch (port_number) {
1797         case 0:
1798                 edge_port->uart_base = UMPMEM_BASE_UART1;
1799                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1800                 break;
1801         case 1:
1802                 edge_port->uart_base = UMPMEM_BASE_UART2;
1803                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1804                 break;
1805         default:
1806                 dev_err(&port->dev, "Unknown port number!!!\n");
1807                 return -ENODEV;
1808         }
1809
1810         dev_dbg(&port->dev, "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
1811                 __func__, port_number, edge_port->uart_base, edge_port->dma_address);
1812
1813         dev = port->serial->dev;
1814
1815         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1816         init_waitqueue_head(&edge_port->delta_msr_wait);
1817
1818         /* turn off loopback */
1819         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1820         if (status) {
1821                 dev_err(&port->dev,
1822                                 "%s - cannot send clear loopback command, %d\n",
1823                         __func__, status);
1824                 return status;
1825         }
1826
1827         /* set up the port settings */
1828         if (tty)
1829                 edge_set_termios(tty, port, &tty->termios);
1830
1831         /* open up the port */
1832
1833         /* milliseconds to timeout for DMA transfer */
1834         transaction_timeout = 2;
1835
1836         edge_port->ump_read_timeout =
1837                                 max(20, ((transaction_timeout * 3) / 2));
1838
1839         /* milliseconds to timeout for DMA transfer */
1840         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1841                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1842                              (transaction_timeout << 2));
1843
1844         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1845
1846         /* Tell TI to open and start the port */
1847         status = send_cmd(dev, UMPC_OPEN_PORT,
1848                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1849         if (status) {
1850                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1851                                                         __func__, status);
1852                 return status;
1853         }
1854
1855         /* Start the DMA? */
1856         status = send_cmd(dev, UMPC_START_PORT,
1857                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1858         if (status) {
1859                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1860                                                         __func__, status);
1861                 return status;
1862         }
1863
1864         /* Clear TX and RX buffers in UMP */
1865         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1866         if (status) {
1867                 dev_err(&port->dev,
1868                         "%s - cannot send clear buffers command, %d\n",
1869                         __func__, status);
1870                 return status;
1871         }
1872
1873         /* Read Initial MSR */
1874         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1875                                 (__u16)(UMPM_UART1_PORT + port_number),
1876                                 &edge_port->shadow_msr, 1);
1877         if (status) {
1878                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1879                                                         __func__, status);
1880                 return status;
1881         }
1882
1883         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1884
1885         /* Set Initial MCR */
1886         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1887         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1888
1889         edge_serial = edge_port->edge_serial;
1890         if (mutex_lock_interruptible(&edge_serial->es_lock))
1891                 return -ERESTARTSYS;
1892         if (edge_serial->num_ports_open == 0) {
1893                 /* we are the first port to open, post the interrupt urb */
1894                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1895                 if (!urb) {
1896                         dev_err(&port->dev,
1897                                 "%s - no interrupt urb present, exiting\n",
1898                                 __func__);
1899                         status = -EINVAL;
1900                         goto release_es_lock;
1901                 }
1902                 urb->context = edge_serial;
1903                 status = usb_submit_urb(urb, GFP_KERNEL);
1904                 if (status) {
1905                         dev_err(&port->dev,
1906                                 "%s - usb_submit_urb failed with value %d\n",
1907                                         __func__, status);
1908                         goto release_es_lock;
1909                 }
1910         }
1911
1912         /*
1913          * reset the data toggle on the bulk endpoints to work around bug in
1914          * host controllers where things get out of sync some times
1915          */
1916         usb_clear_halt(dev, port->write_urb->pipe);
1917         usb_clear_halt(dev, port->read_urb->pipe);
1918
1919         /* start up our bulk read urb */
1920         urb = port->read_urb;
1921         if (!urb) {
1922                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1923                                                                 __func__);
1924                 status = -EINVAL;
1925                 goto unlink_int_urb;
1926         }
1927         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1928         urb->context = edge_port;
1929         status = usb_submit_urb(urb, GFP_KERNEL);
1930         if (status) {
1931                 dev_err(&port->dev,
1932                         "%s - read bulk usb_submit_urb failed with value %d\n",
1933                                 __func__, status);
1934                 goto unlink_int_urb;
1935         }
1936
1937         ++edge_serial->num_ports_open;
1938
1939         goto release_es_lock;
1940
1941 unlink_int_urb:
1942         if (edge_port->edge_serial->num_ports_open == 0)
1943                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1944 release_es_lock:
1945         mutex_unlock(&edge_serial->es_lock);
1946         return status;
1947 }
1948
1949 static void edge_close(struct usb_serial_port *port)
1950 {
1951         struct edgeport_serial *edge_serial;
1952         struct edgeport_port *edge_port;
1953         struct usb_serial *serial = port->serial;
1954         int port_number;
1955
1956         edge_serial = usb_get_serial_data(port->serial);
1957         edge_port = usb_get_serial_port_data(port);
1958         if (edge_serial == NULL || edge_port == NULL)
1959                 return;
1960
1961         /* The bulkreadcompletion routine will check
1962          * this flag and dump add read data */
1963         edge_port->close_pending = 1;
1964
1965         /* chase the port close and flush */
1966         chase_port(edge_port, (HZ * closing_wait) / 100, 1);
1967
1968         usb_kill_urb(port->read_urb);
1969         usb_kill_urb(port->write_urb);
1970         edge_port->ep_write_urb_in_use = 0;
1971
1972         /* assuming we can still talk to the device,
1973          * send a close port command to it */
1974         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1975         port_number = port->number - port->serial->minor;
1976
1977         mutex_lock(&serial->disc_mutex);
1978         if (!serial->disconnected) {
1979                 send_cmd(serial->dev,
1980                                      UMPC_CLOSE_PORT,
1981                                      (__u8)(UMPM_UART1_PORT + port_number),
1982                                      0,
1983                                      NULL,
1984                                      0);
1985         }
1986         mutex_unlock(&serial->disc_mutex);
1987
1988         mutex_lock(&edge_serial->es_lock);
1989         --edge_port->edge_serial->num_ports_open;
1990         if (edge_port->edge_serial->num_ports_open <= 0) {
1991                 /* last port is now closed, let's shut down our interrupt urb */
1992                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1993                 edge_port->edge_serial->num_ports_open = 0;
1994         }
1995         mutex_unlock(&edge_serial->es_lock);
1996         edge_port->close_pending = 0;
1997 }
1998
1999 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2000                                 const unsigned char *data, int count)
2001 {
2002         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2003
2004         if (count == 0) {
2005                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2006                 return 0;
2007         }
2008
2009         if (edge_port == NULL)
2010                 return -ENODEV;
2011         if (edge_port->close_pending == 1)
2012                 return -ENODEV;
2013
2014         count = kfifo_in_locked(&edge_port->write_fifo, data, count,
2015                                                         &edge_port->ep_lock);
2016         edge_send(tty);
2017
2018         return count;
2019 }
2020
2021 static void edge_send(struct tty_struct *tty)
2022 {
2023         struct usb_serial_port *port = tty->driver_data;
2024         int count, result;
2025         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2026         unsigned long flags;
2027
2028         spin_lock_irqsave(&edge_port->ep_lock, flags);
2029
2030         if (edge_port->ep_write_urb_in_use) {
2031                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2032                 return;
2033         }
2034
2035         count = kfifo_out(&edge_port->write_fifo,
2036                                 port->write_urb->transfer_buffer,
2037                                 port->bulk_out_size);
2038
2039         if (count == 0) {
2040                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2041                 return;
2042         }
2043
2044         edge_port->ep_write_urb_in_use = 1;
2045
2046         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2047
2048         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2049
2050         /* set up our urb */
2051         port->write_urb->transfer_buffer_length = count;
2052
2053         /* send the data out the bulk port */
2054         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2055         if (result) {
2056                 dev_err_console(port,
2057                         "%s - failed submitting write urb, error %d\n",
2058                                 __func__, result);
2059                 edge_port->ep_write_urb_in_use = 0;
2060                 /* TODO: reschedule edge_send */
2061         } else
2062                 edge_port->icount.tx += count;
2063
2064         /* wakeup any process waiting for writes to complete */
2065         /* there is now more room in the buffer for new writes */
2066         if (tty)
2067                 tty_wakeup(tty);
2068 }
2069
2070 static int edge_write_room(struct tty_struct *tty)
2071 {
2072         struct usb_serial_port *port = tty->driver_data;
2073         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2074         int room = 0;
2075         unsigned long flags;
2076
2077         if (edge_port == NULL)
2078                 return 0;
2079         if (edge_port->close_pending == 1)
2080                 return 0;
2081
2082         spin_lock_irqsave(&edge_port->ep_lock, flags);
2083         room = kfifo_avail(&edge_port->write_fifo);
2084         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2085
2086         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
2087         return room;
2088 }
2089
2090 static int edge_chars_in_buffer(struct tty_struct *tty)
2091 {
2092         struct usb_serial_port *port = tty->driver_data;
2093         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2094         int chars = 0;
2095         unsigned long flags;
2096
2097         if (edge_port == NULL)
2098                 return 0;
2099         if (edge_port->close_pending == 1)
2100                 return 0;
2101
2102         spin_lock_irqsave(&edge_port->ep_lock, flags);
2103         chars = kfifo_len(&edge_port->write_fifo);
2104         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2105
2106         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
2107         return chars;
2108 }
2109
2110 static void edge_throttle(struct tty_struct *tty)
2111 {
2112         struct usb_serial_port *port = tty->driver_data;
2113         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2114         int status;
2115
2116         if (edge_port == NULL)
2117                 return;
2118
2119         /* if we are implementing XON/XOFF, send the stop character */
2120         if (I_IXOFF(tty)) {
2121                 unsigned char stop_char = STOP_CHAR(tty);
2122                 status = edge_write(tty, port, &stop_char, 1);
2123                 if (status <= 0) {
2124                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2125                 }
2126         }
2127
2128         /* if we are implementing RTS/CTS, stop reads */
2129         /* and the Edgeport will clear the RTS line */
2130         if (C_CRTSCTS(tty))
2131                 stop_read(edge_port);
2132
2133 }
2134
2135 static void edge_unthrottle(struct tty_struct *tty)
2136 {
2137         struct usb_serial_port *port = tty->driver_data;
2138         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2139         int status;
2140
2141         if (edge_port == NULL)
2142                 return;
2143
2144         /* if we are implementing XON/XOFF, send the start character */
2145         if (I_IXOFF(tty)) {
2146                 unsigned char start_char = START_CHAR(tty);
2147                 status = edge_write(tty, port, &start_char, 1);
2148                 if (status <= 0) {
2149                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2150                 }
2151         }
2152         /* if we are implementing RTS/CTS, restart reads */
2153         /* are the Edgeport will assert the RTS line */
2154         if (C_CRTSCTS(tty)) {
2155                 status = restart_read(edge_port);
2156                 if (status)
2157                         dev_err(&port->dev,
2158                                 "%s - read bulk usb_submit_urb failed: %d\n",
2159                                                         __func__, status);
2160         }
2161
2162 }
2163
2164 static void stop_read(struct edgeport_port *edge_port)
2165 {
2166         unsigned long flags;
2167
2168         spin_lock_irqsave(&edge_port->ep_lock, flags);
2169
2170         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2171                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2172         edge_port->shadow_mcr &= ~MCR_RTS;
2173
2174         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2175 }
2176
2177 static int restart_read(struct edgeport_port *edge_port)
2178 {
2179         struct urb *urb;
2180         int status = 0;
2181         unsigned long flags;
2182
2183         spin_lock_irqsave(&edge_port->ep_lock, flags);
2184
2185         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2186                 urb = edge_port->port->read_urb;
2187                 status = usb_submit_urb(urb, GFP_ATOMIC);
2188         }
2189         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2190         edge_port->shadow_mcr |= MCR_RTS;
2191
2192         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2193
2194         return status;
2195 }
2196
2197 static void change_port_settings(struct tty_struct *tty,
2198                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2199 {
2200         struct device *dev = &edge_port->port->dev;
2201         struct ump_uart_config *config;
2202         int baud;
2203         unsigned cflag;
2204         int status;
2205         int port_number = edge_port->port->number -
2206                                         edge_port->port->serial->minor;
2207
2208         dev_dbg(dev, "%s - port %d\n", __func__, edge_port->port->number);
2209
2210         config = kmalloc (sizeof (*config), GFP_KERNEL);
2211         if (!config) {
2212                 tty->termios = *old_termios;
2213                 dev_err(dev, "%s - out of memory\n", __func__);
2214                 return;
2215         }
2216
2217         cflag = tty->termios.c_cflag;
2218
2219         config->wFlags = 0;
2220
2221         /* These flags must be set */
2222         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2223         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2224         config->bUartMode = (__u8)(edge_port->bUartMode);
2225
2226         switch (cflag & CSIZE) {
2227         case CS5:
2228                     config->bDataBits = UMP_UART_CHAR5BITS;
2229                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2230                     break;
2231         case CS6:
2232                     config->bDataBits = UMP_UART_CHAR6BITS;
2233                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2234                     break;
2235         case CS7:
2236                     config->bDataBits = UMP_UART_CHAR7BITS;
2237                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2238                     break;
2239         default:
2240         case CS8:
2241                     config->bDataBits = UMP_UART_CHAR8BITS;
2242                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2243                             break;
2244         }
2245
2246         if (cflag & PARENB) {
2247                 if (cflag & PARODD) {
2248                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2249                         config->bParity = UMP_UART_ODDPARITY;
2250                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2251                 } else {
2252                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2253                         config->bParity = UMP_UART_EVENPARITY;
2254                         dev_dbg(dev, "%s - parity = even\n", __func__);
2255                 }
2256         } else {
2257                 config->bParity = UMP_UART_NOPARITY;
2258                 dev_dbg(dev, "%s - parity = none\n", __func__);
2259         }
2260
2261         if (cflag & CSTOPB) {
2262                 config->bStopBits = UMP_UART_STOPBIT2;
2263                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2264         } else {
2265                 config->bStopBits = UMP_UART_STOPBIT1;
2266                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2267         }
2268
2269         /* figure out the flow control settings */
2270         if (cflag & CRTSCTS) {
2271                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2272                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2273                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2274         } else {
2275                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2276                 tty->hw_stopped = 0;
2277                 restart_read(edge_port);
2278         }
2279
2280         /* if we are implementing XON/XOFF, set the start and stop
2281            character in the device */
2282         config->cXon  = START_CHAR(tty);
2283         config->cXoff = STOP_CHAR(tty);
2284
2285         /* if we are implementing INBOUND XON/XOFF */
2286         if (I_IXOFF(tty)) {
2287                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2288                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2289                         __func__, config->cXon, config->cXoff);
2290         } else
2291                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2292
2293         /* if we are implementing OUTBOUND XON/XOFF */
2294         if (I_IXON(tty)) {
2295                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2296                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2297                         __func__, config->cXon, config->cXoff);
2298         } else
2299                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2300
2301         tty->termios.c_cflag &= ~CMSPAR;
2302
2303         /* Round the baud rate */
2304         baud = tty_get_baud_rate(tty);
2305         if (!baud) {
2306                 /* pick a default, any default... */
2307                 baud = 9600;
2308         } else
2309                 tty_encode_baud_rate(tty, baud, baud);
2310
2311         edge_port->baud_rate = baud;
2312         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2313
2314         /* FIXME: Recompute actual baud from divisor here */
2315
2316         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2317
2318         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2319         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2320         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2321         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2322         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2323         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2324         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2325         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2326
2327         /* move the word values into big endian mode */
2328         cpu_to_be16s(&config->wFlags);
2329         cpu_to_be16s(&config->wBaudRate);
2330
2331         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2332                                 (__u8)(UMPM_UART1_PORT + port_number),
2333                                 0, (__u8 *)config, sizeof(*config));
2334         if (status)
2335                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2336                         __func__, status);
2337         kfree(config);
2338 }
2339
2340 static void edge_set_termios(struct tty_struct *tty,
2341                 struct usb_serial_port *port, struct ktermios *old_termios)
2342 {
2343         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2344         unsigned int cflag;
2345
2346         cflag = tty->termios.c_cflag;
2347
2348         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2349                 tty->termios.c_cflag, tty->termios.c_iflag);
2350         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2351                 old_termios->c_cflag, old_termios->c_iflag);
2352         dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
2353
2354         if (edge_port == NULL)
2355                 return;
2356         /* change the port settings to the new ones specified */
2357         change_port_settings(tty, edge_port, old_termios);
2358 }
2359
2360 static int edge_tiocmset(struct tty_struct *tty,
2361                                         unsigned int set, unsigned int clear)
2362 {
2363         struct usb_serial_port *port = tty->driver_data;
2364         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2365         unsigned int mcr;
2366         unsigned long flags;
2367
2368         spin_lock_irqsave(&edge_port->ep_lock, flags);
2369         mcr = edge_port->shadow_mcr;
2370         if (set & TIOCM_RTS)
2371                 mcr |= MCR_RTS;
2372         if (set & TIOCM_DTR)
2373                 mcr |= MCR_DTR;
2374         if (set & TIOCM_LOOP)
2375                 mcr |= MCR_LOOPBACK;
2376
2377         if (clear & TIOCM_RTS)
2378                 mcr &= ~MCR_RTS;
2379         if (clear & TIOCM_DTR)
2380                 mcr &= ~MCR_DTR;
2381         if (clear & TIOCM_LOOP)
2382                 mcr &= ~MCR_LOOPBACK;
2383
2384         edge_port->shadow_mcr = mcr;
2385         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2386
2387         restore_mcr(edge_port, mcr);
2388         return 0;
2389 }
2390
2391 static int edge_tiocmget(struct tty_struct *tty)
2392 {
2393         struct usb_serial_port *port = tty->driver_data;
2394         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2395         unsigned int result = 0;
2396         unsigned int msr;
2397         unsigned int mcr;
2398         unsigned long flags;
2399
2400         spin_lock_irqsave(&edge_port->ep_lock, flags);
2401
2402         msr = edge_port->shadow_msr;
2403         mcr = edge_port->shadow_mcr;
2404         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2405                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2406                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2407                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2408                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2409                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2410
2411
2412         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2413         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2414
2415         return result;
2416 }
2417
2418 static int edge_get_icount(struct tty_struct *tty,
2419                                 struct serial_icounter_struct *icount)
2420 {
2421         struct usb_serial_port *port = tty->driver_data;
2422         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2423         struct async_icount *ic = &edge_port->icount;
2424
2425         icount->cts = ic->cts;
2426         icount->dsr = ic->dsr;
2427         icount->rng = ic->rng;
2428         icount->dcd = ic->dcd;
2429         icount->tx = ic->tx;
2430         icount->rx = ic->rx;
2431         icount->frame = ic->frame;
2432         icount->parity = ic->parity;
2433         icount->overrun = ic->overrun;
2434         icount->brk = ic->brk;
2435         icount->buf_overrun = ic->buf_overrun;
2436         return 0;
2437 }
2438
2439 static int get_serial_info(struct edgeport_port *edge_port,
2440                                 struct serial_struct __user *retinfo)
2441 {
2442         struct serial_struct tmp;
2443
2444         if (!retinfo)
2445                 return -EFAULT;
2446
2447         memset(&tmp, 0, sizeof(tmp));
2448
2449         tmp.type                = PORT_16550A;
2450         tmp.line                = edge_port->port->serial->minor;
2451         tmp.port                = edge_port->port->number;
2452         tmp.irq                 = 0;
2453         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2454         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2455         tmp.baud_base           = 9600;
2456         tmp.close_delay         = 5*HZ;
2457         tmp.closing_wait        = closing_wait;
2458
2459         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2460                 return -EFAULT;
2461         return 0;
2462 }
2463
2464 static int edge_ioctl(struct tty_struct *tty,
2465                                         unsigned int cmd, unsigned long arg)
2466 {
2467         struct usb_serial_port *port = tty->driver_data;
2468         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2469         struct async_icount cnow;
2470         struct async_icount cprev;
2471
2472         dev_dbg(&port->dev, "%s - port %d, cmd = 0x%x\n", __func__, port->number, cmd);
2473
2474         switch (cmd) {
2475         case TIOCGSERIAL:
2476                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2477                 return get_serial_info(edge_port,
2478                                 (struct serial_struct __user *) arg);
2479         case TIOCMIWAIT:
2480                 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__);
2481                 cprev = edge_port->icount;
2482                 while (1) {
2483                         interruptible_sleep_on(&edge_port->delta_msr_wait);
2484                         /* see if a signal did it */
2485                         if (signal_pending(current))
2486                                 return -ERESTARTSYS;
2487                         cnow = edge_port->icount;
2488                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2489                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2490                                 return -EIO; /* no change => error */
2491                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2492                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2493                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2494                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2495                                 return 0;
2496                         }
2497                         cprev = cnow;
2498                 }
2499                 /* not reached */
2500                 break;
2501         }
2502         return -ENOIOCTLCMD;
2503 }
2504
2505 static void edge_break(struct tty_struct *tty, int break_state)
2506 {
2507         struct usb_serial_port *port = tty->driver_data;
2508         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2509         int status;
2510         int bv = 0;     /* Off */
2511
2512         /* chase the port close */
2513         chase_port(edge_port, 0, 0);
2514
2515         if (break_state == -1)
2516                 bv = 1; /* On */
2517         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2518         if (status)
2519                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2520                         __func__, status);
2521 }
2522
2523 static int edge_startup(struct usb_serial *serial)
2524 {
2525         struct edgeport_serial *edge_serial;
2526         int status;
2527
2528         /* create our private serial structure */
2529         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2530         if (edge_serial == NULL) {
2531                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2532                 return -ENOMEM;
2533         }
2534         mutex_init(&edge_serial->es_lock);
2535         edge_serial->serial = serial;
2536         usb_set_serial_data(serial, edge_serial);
2537
2538         status = download_fw(edge_serial);
2539         if (status) {
2540                 kfree(edge_serial);
2541                 return status;
2542         }
2543
2544         return 0;
2545 }
2546
2547 static void edge_disconnect(struct usb_serial *serial)
2548 {
2549 }
2550
2551 static void edge_release(struct usb_serial *serial)
2552 {
2553         kfree(usb_get_serial_data(serial));
2554 }
2555
2556 static int edge_port_probe(struct usb_serial_port *port)
2557 {
2558         struct edgeport_port *edge_port;
2559         int ret;
2560
2561         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2562         if (!edge_port)
2563                 return -ENOMEM;
2564
2565         ret = kfifo_alloc(&edge_port->write_fifo, EDGE_OUT_BUF_SIZE,
2566                                                                 GFP_KERNEL);
2567         if (ret) {
2568                 kfree(edge_port);
2569                 return -ENOMEM;
2570         }
2571
2572         spin_lock_init(&edge_port->ep_lock);
2573         edge_port->port = port;
2574         edge_port->edge_serial = usb_get_serial_data(port->serial);
2575         edge_port->bUartMode = default_uart_mode;
2576
2577         usb_set_serial_port_data(port, edge_port);
2578
2579         ret = edge_create_sysfs_attrs(port);
2580         if (ret) {
2581                 kfifo_free(&edge_port->write_fifo);
2582                 kfree(edge_port);
2583                 return ret;
2584         }
2585
2586         return 0;
2587 }
2588
2589 static int edge_port_remove(struct usb_serial_port *port)
2590 {
2591         struct edgeport_port *edge_port;
2592
2593         edge_port = usb_get_serial_port_data(port);
2594
2595         edge_remove_sysfs_attrs(port);
2596         kfifo_free(&edge_port->write_fifo);
2597         kfree(edge_port);
2598
2599         return 0;
2600 }
2601
2602 /* Sysfs Attributes */
2603
2604 static ssize_t show_uart_mode(struct device *dev,
2605         struct device_attribute *attr, char *buf)
2606 {
2607         struct usb_serial_port *port = to_usb_serial_port(dev);
2608         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2609
2610         return sprintf(buf, "%d\n", edge_port->bUartMode);
2611 }
2612
2613 static ssize_t store_uart_mode(struct device *dev,
2614         struct device_attribute *attr, const char *valbuf, size_t count)
2615 {
2616         struct usb_serial_port *port = to_usb_serial_port(dev);
2617         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2618         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2619
2620         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2621
2622         if (v < 256)
2623                 edge_port->bUartMode = v;
2624         else
2625                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2626
2627         return count;
2628 }
2629
2630 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2631                                                         store_uart_mode);
2632
2633 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2634 {
2635         return device_create_file(&port->dev, &dev_attr_uart_mode);
2636 }
2637
2638 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2639 {
2640         device_remove_file(&port->dev, &dev_attr_uart_mode);
2641         return 0;
2642 }
2643
2644
2645 static struct usb_serial_driver edgeport_1port_device = {
2646         .driver = {
2647                 .owner          = THIS_MODULE,
2648                 .name           = "edgeport_ti_1",
2649         },
2650         .description            = "Edgeport TI 1 port adapter",
2651         .id_table               = edgeport_1port_id_table,
2652         .num_ports              = 1,
2653         .open                   = edge_open,
2654         .close                  = edge_close,
2655         .throttle               = edge_throttle,
2656         .unthrottle             = edge_unthrottle,
2657         .attach                 = edge_startup,
2658         .disconnect             = edge_disconnect,
2659         .release                = edge_release,
2660         .port_probe             = edge_port_probe,
2661         .port_remove            = edge_port_remove,
2662         .ioctl                  = edge_ioctl,
2663         .set_termios            = edge_set_termios,
2664         .tiocmget               = edge_tiocmget,
2665         .tiocmset               = edge_tiocmset,
2666         .get_icount             = edge_get_icount,
2667         .write                  = edge_write,
2668         .write_room             = edge_write_room,
2669         .chars_in_buffer        = edge_chars_in_buffer,
2670         .break_ctl              = edge_break,
2671         .read_int_callback      = edge_interrupt_callback,
2672         .read_bulk_callback     = edge_bulk_in_callback,
2673         .write_bulk_callback    = edge_bulk_out_callback,
2674 };
2675
2676 static struct usb_serial_driver edgeport_2port_device = {
2677         .driver = {
2678                 .owner          = THIS_MODULE,
2679                 .name           = "edgeport_ti_2",
2680         },
2681         .description            = "Edgeport TI 2 port adapter",
2682         .id_table               = edgeport_2port_id_table,
2683         .num_ports              = 2,
2684         .open                   = edge_open,
2685         .close                  = edge_close,
2686         .throttle               = edge_throttle,
2687         .unthrottle             = edge_unthrottle,
2688         .attach                 = edge_startup,
2689         .disconnect             = edge_disconnect,
2690         .release                = edge_release,
2691         .port_probe             = edge_port_probe,
2692         .port_remove            = edge_port_remove,
2693         .ioctl                  = edge_ioctl,
2694         .set_termios            = edge_set_termios,
2695         .tiocmget               = edge_tiocmget,
2696         .tiocmset               = edge_tiocmset,
2697         .write                  = edge_write,
2698         .write_room             = edge_write_room,
2699         .chars_in_buffer        = edge_chars_in_buffer,
2700         .break_ctl              = edge_break,
2701         .read_int_callback      = edge_interrupt_callback,
2702         .read_bulk_callback     = edge_bulk_in_callback,
2703         .write_bulk_callback    = edge_bulk_out_callback,
2704 };
2705
2706 static struct usb_serial_driver * const serial_drivers[] = {
2707         &edgeport_1port_device, &edgeport_2port_device, NULL
2708 };
2709
2710 module_usb_serial_driver(serial_drivers, id_table_combined);
2711
2712 MODULE_AUTHOR(DRIVER_AUTHOR);
2713 MODULE_DESCRIPTION(DRIVER_DESC);
2714 MODULE_LICENSE("GPL");
2715 MODULE_FIRMWARE("edgeport/down3.bin");
2716
2717 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2718 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2719
2720 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2721 MODULE_PARM_DESC(ignore_cpu_rev,
2722                         "Ignore the cpu revision when connecting to a device");
2723
2724 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2725 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");