drivers/usb/serial/io_ti.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
  14  *
  15  * For questions or problems with this driver, contact Inside Out
  16  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  17  * or Al Borchers <alborchers@steinerpoint.com>.
  18  *
  19  * Version history:
  20  *
  21  *      July 11, 2002   Removed 4 port device structure since all TI UMP
  22  *                      chips have only 2 ports
  23  *                      David Iacovelli (davidi@ionetworks.com)
  24  *
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/errno.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/tty.h>
  33 #include <linux/tty_driver.h>
  34 #include <linux/tty_flip.h>
  35 #include <linux/module.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/mutex.h>
  38 #include <linux/serial.h>
  39 #include <linux/ioctl.h>
  40 #include <linux/firmware.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/usb.h>
  43 #include <linux/usb/serial.h>
  44
  45 #include "io_16654.h"
  46 #include "io_usbvend.h"
  47 #include "io_ti.h"
  48
  49 /*
  50  * Version Information
  51  */
  52 #define DRIVER_VERSION "v0.7mode043006"
  53 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  54 #define DRIVER_DESC "Edgeport USB Serial Driver"
  55
  56 #define EPROM_PAGE_SIZE         64
  57
  58
  59 struct edgeport_uart_buf_desc {
  60         __u32 count;            /* Number of bytes currently in buffer */
  61 };
  62
  63 /* different hardware types */
  64 #define HARDWARE_TYPE_930       0
  65 #define HARDWARE_TYPE_TIUMP     1
  66
  67 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
  68 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
  69 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
  70 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
  71 #define TI_MODE_TRANSITIONING   3   /* Currently in boot mode but
  72                                        transitioning to download mode      */
  73
  74 /* read urb state */
  75 #define EDGE_READ_URB_RUNNING   0
  76 #define EDGE_READ_URB_STOPPING  1
  77 #define EDGE_READ_URB_STOPPED   2
  78
  79 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
  80
  81 #define EDGE_OUT_BUF_SIZE       1024
  82
  83
  84 /* Product information read from the Edgeport */
  85 struct product_info {
  86         int     TiMode;                 /* Current TI Mode  */
  87         __u8    hardware_type;          /* Type of hardware */
  88 } __attribute__((packed));
  89
  90 /* circular buffer */
  91 struct edge_buf {
  92         unsigned int    buf_size;
  93         char            *buf_buf;
  94         char            *buf_get;
  95         char            *buf_put;
  96 };
  97
  98 struct edgeport_port {
  99         __u16 uart_base;
 100         __u16 dma_address;
 101         __u8 shadow_msr;
 102         __u8 shadow_mcr;
 103         __u8 shadow_lsr;
 104         __u8 lsr_mask;
 105         __u32 ump_read_timeout;         /* Number of miliseconds the UMP will
 106                                            wait without data before completing
 107                                            a read short */
 108         int baud_rate;
 109         int close_pending;
 110         int lsr_event;
 111         struct edgeport_uart_buf_desc tx;
 112         struct async_icount     icount;
 113         wait_queue_head_t       delta_msr_wait; /* for handling sleeping while
 114                                                    waiting for msr change to
 115                                                    happen */
 116         struct edgeport_serial  *edge_serial;
 117         struct usb_serial_port  *port;
 118         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
 119         spinlock_t ep_lock;
 120         int ep_read_urb_state;
 121         int ep_write_urb_in_use;
 122         struct edge_buf *ep_out_buf;
 123 };
 124
 125 struct edgeport_serial {
 126         struct product_info product_info;
 127         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
 128         u8 TiReadI2C;                   /* Set to TRUE if we have read the
 129                                            I2c in Boot Mode */
 130         struct mutex es_lock;
 131         int num_ports_open;
 132         struct usb_serial *serial;
 133 };
 134
 135
 136 /* Devices that this driver supports */
 137 static struct usb_device_id edgeport_1port_id_table [] = {
 138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 154         { }
 155 };
 156
 157 static struct usb_device_id edgeport_2port_id_table [] = {
 158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 170         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 176         { }
 177 };
 178
 179 /* Devices that this driver supports */
 180 static struct usb_device_id id_table_combined [] = {
 181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 209         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 210         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 211         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 212         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 213         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 214         { }
 215 };
 216
 217 MODULE_DEVICE_TABLE(usb, id_table_combined);
 218
 219 static struct usb_driver io_driver = {
 220         .name =         "io_ti",
 221         .probe =        usb_serial_probe,
 222         .disconnect =   usb_serial_disconnect,
 223         .id_table =     id_table_combined,
 224         .no_dynamic_id =        1,
 225 };
 226
 227
 228 static unsigned char OperationalMajorVersion;
 229 static unsigned char OperationalMinorVersion;
 230 static unsigned short OperationalBuildNumber;
 231
 232 static int debug;
 233
 234 static int closing_wait = EDGE_CLOSING_WAIT;
 235 static int ignore_cpu_rev;
 236 static int default_uart_mode;           /* RS232 */
 237
 238 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
 239                           unsigned char *data, int length);
 240
 241 static void stop_read(struct edgeport_port *edge_port);
 242 static int restart_read(struct edgeport_port *edge_port);
 243
 244 static void edge_set_termios(struct tty_struct *tty,
 245                 struct usb_serial_port *port, struct ktermios *old_termios);
 246 static void edge_send(struct tty_struct *tty);
 247
 248 /* sysfs attributes */
 249 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 250 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 251
 252 /* circular buffer */
 253 static struct edge_buf *edge_buf_alloc(unsigned int size);
 254 static void edge_buf_free(struct edge_buf *eb);
 255 static void edge_buf_clear(struct edge_buf *eb);
 256 static unsigned int edge_buf_data_avail(struct edge_buf *eb);
 257 static unsigned int edge_buf_space_avail(struct edge_buf *eb);
 258 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
 259         unsigned int count);
 260 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
 261         unsigned int count);
 262
 263
 264 static int ti_vread_sync(struct usb_device *dev, __u8 request,
 265                                 __u16 value, __u16 index, u8 *data, int size)
 266 {
 267         int status;
 268
 269         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 270                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
 271                         value, index, data, size, 1000);
 272         if (status < 0)
 273                 return status;
 274         if (status != size) {
 275                 dbg("%s - wanted to write %d, but only wrote %d",
 276                                              __func__, size, status);
 277                 return -ECOMM;
 278         }
 279         return 0;
 280 }
 281
 282 static int ti_vsend_sync(struct usb_device *dev, __u8 request,
 283                                 __u16 value, __u16 index, u8 *data, int size)
 284 {
 285         int status;
 286
 287         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 288                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 289                         value, index, data, size, 1000);
 290         if (status < 0)
 291                 return status;
 292         if (status != size) {
 293                 dbg("%s - wanted to write %d, but only wrote %d",
 294                      __func__, size, status);
 295                 return -ECOMM;
 296         }
 297         return 0;
 298 }
 299
 300 static int send_cmd(struct usb_device *dev, __u8 command,
 301                                 __u8 moduleid, __u16 value, u8 *data,
 302                                 int size)
 303 {
 304         return ti_vsend_sync(dev, command, value, moduleid, data, size);
 305 }
 306
 307 /* clear tx/rx buffers and fifo in TI UMP */
 308 static int purge_port(struct usb_serial_port *port, __u16 mask)
 309 {
 310         int port_number = port->number - port->serial->minor;
 311
 312         dbg("%s - port %d, mask %x", __func__, port_number, mask);
 313
 314         return send_cmd(port->serial->dev,
 315                                         UMPC_PURGE_PORT,
 316                                         (__u8)(UMPM_UART1_PORT + port_number),
 317                                         mask,
 318                                         NULL,
 319                                         0);
 320 }
 321
 322 /**
 323  * read_download_mem - Read edgeport memory from TI chip
 324  * @dev: usb device pointer
 325  * @start_address: Device CPU address at which to read
 326  * @length: Length of above data
 327  * @address_type: Can read both XDATA and I2C
 328  * @buffer: pointer to input data buffer
 329  */
 330 static int read_download_mem(struct usb_device *dev, int start_address,
 331                                 int length, __u8 address_type, __u8 *buffer)
 332 {
 333         int status = 0;
 334         __u8 read_length;
 335         __be16 be_start_address;
 336
 337         dbg("%s - @ %x for %d", __func__, start_address, length);
 338
 339         /* Read in blocks of 64 bytes
 340          * (TI firmware can't handle more than 64 byte reads)
 341          */
 342         while (length) {
 343                 if (length > 64)
 344                         read_length = 64;
 345                 else
 346                         read_length = (__u8)length;
 347
 348                 if (read_length > 1) {
 349                         dbg("%s - @ %x for %d", __func__,
 350                              start_address, read_length);
 351                 }
 352                 be_start_address = cpu_to_be16(start_address);
 353                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
 354                                         (__u16)address_type,
 355                                         (__force __u16)be_start_address,
 356                                         buffer, read_length);
 357
 358                 if (status) {
 359                         dbg("%s - ERROR %x", __func__, status);
 360                         return status;
 361                 }
 362
 363                 if (read_length > 1)
 364                         usb_serial_debug_data(debug, &dev->dev, __func__,
 365                                               read_length, buffer);
 366
 367                 /* Update pointers/length */
 368                 start_address += read_length;
 369                 buffer += read_length;
 370                 length -= read_length;
 371         }
 372
 373         return status;
 374 }
 375
 376 static int read_ram(struct usb_device *dev, int start_address,
 377                                                 int length, __u8 *buffer)
 378 {
 379         return read_download_mem(dev, start_address, length,
 380                                         DTK_ADDR_SPACE_XDATA, buffer);
 381 }
 382
 383 /* Read edgeport memory to a given block */
 384 static int read_boot_mem(struct edgeport_serial *serial,
 385                                 int start_address, int length, __u8 *buffer)
 386 {
 387         int status = 0;
 388         int i;
 389
 390         for (i = 0; i < length; i++) {
 391                 status = ti_vread_sync(serial->serial->dev,
 392                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
 393                                 (__u16)(start_address+i), &buffer[i], 0x01);
 394                 if (status) {
 395                         dbg("%s - ERROR %x", __func__, status);
 396                         return status;
 397                 }
 398         }
 399
 400         dbg("%s - start_address = %x, length = %d",
 401                                         __func__, start_address, length);
 402         usb_serial_debug_data(debug, &serial->serial->dev->dev,
 403                                         __func__, length, buffer);
 404
 405         serial->TiReadI2C = 1;
 406
 407         return status;
 408 }
 409
 410 /* Write given block to TI EPROM memory */
 411 static int write_boot_mem(struct edgeport_serial *serial,
 412                                 int start_address, int length, __u8 *buffer)
 413 {
 414         int status = 0;
 415         int i;
 416         __u8 temp;
 417
 418         /* Must do a read before write */
 419         if (!serial->TiReadI2C) {
 420                 status = read_boot_mem(serial, 0, 1, &temp);
 421                 if (status)
 422                         return status;
 423         }
 424
 425         for (i = 0; i < length; ++i) {
 426                 status = ti_vsend_sync(serial->serial->dev,
 427                                 UMPC_MEMORY_WRITE, buffer[i],
 428                                 (__u16)(i + start_address), NULL, 0);
 429                 if (status)
 430                         return status;
 431         }
 432
 433         dbg("%s - start_sddr = %x, length = %d",
 434                                         __func__, start_address, length);
 435         usb_serial_debug_data(debug, &serial->serial->dev->dev,
 436                                         __func__, length, buffer);
 437
 438         return status;
 439 }
 440
 441
 442 /* Write edgeport I2C memory to TI chip */
 443 static int write_i2c_mem(struct edgeport_serial *serial,
 444                 int start_address, int length, __u8 address_type, __u8 *buffer)
 445 {
 446         int status = 0;
 447         int write_length;
 448         __be16 be_start_address;
 449
 450         /* We can only send a maximum of 1 aligned byte page at a time */
 451
 452         /* calulate the number of bytes left in the first page */
 453         write_length = EPROM_PAGE_SIZE -
 454                                 (start_address & (EPROM_PAGE_SIZE - 1));
 455
 456         if (write_length > length)
 457                 write_length = length;
 458
 459         dbg("%s - BytesInFirstPage Addr = %x, length = %d",
 460                                         __func__, start_address, write_length);
 461         usb_serial_debug_data(debug, &serial->serial->dev->dev,
 462                                                 __func__, write_length, buffer);
 463
 464         /* Write first page */
 465         be_start_address = cpu_to_be16(start_address);
 466         status = ti_vsend_sync(serial->serial->dev,
 467                                 UMPC_MEMORY_WRITE, (__u16)address_type,
 468                                 (__force __u16)be_start_address,
 469                                 buffer, write_length);
 470         if (status) {
 471                 dbg("%s - ERROR %d", __func__, status);
 472                 return status;
 473         }
 474
 475         length          -= write_length;
 476         start_address   += write_length;
 477         buffer          += write_length;
 478
 479         /* We should be aligned now -- can write
 480            max page size bytes at a time */
 481         while (length) {
 482                 if (length > EPROM_PAGE_SIZE)
 483                         write_length = EPROM_PAGE_SIZE;
 484                 else
 485                         write_length = length;
 486
 487                 dbg("%s - Page Write Addr = %x, length = %d",
 488                                         __func__, start_address, write_length);
 489                 usb_serial_debug_data(debug, &serial->serial->dev->dev,
 490                                         __func__, write_length, buffer);
 491
 492                 /* Write next page */
 493                 be_start_address = cpu_to_be16(start_address);
 494                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 495                                 (__u16)address_type,
 496                                 (__force __u16)be_start_address,
 497                                 buffer, write_length);
 498                 if (status) {
 499                         dev_err(&serial->serial->dev->dev, "%s - ERROR %d\n",
 500                                         __func__, status);
 501                         return status;
 502                 }
 503
 504                 length          -= write_length;
 505                 start_address   += write_length;
 506                 buffer          += write_length;
 507         }
 508         return status;
 509 }
 510
 511 /* Examine the UMP DMA registers and LSR
 512  *
 513  * Check the MSBit of the X and Y DMA byte count registers.
 514  * A zero in this bit indicates that the TX DMA buffers are empty
 515  * then check the TX Empty bit in the UART.
 516  */
 517 static int tx_active(struct edgeport_port *port)
 518 {
 519         int status;
 520         struct out_endpoint_desc_block *oedb;
 521         __u8 *lsr;
 522         int bytes_left = 0;
 523
 524         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
 525         if (!oedb) {
 526                 dev_err(&port->port->dev, "%s - out of memory\n", __func__);
 527                 return -ENOMEM;
 528         }
 529
 530         lsr = kmalloc(1, GFP_KERNEL);   /* Sigh, that's right, just one byte,
 531                                            as not all platforms can do DMA
 532                                            from stack */
 533         if (!lsr) {
 534                 kfree(oedb);
 535                 return -ENOMEM;
 536         }
 537         /* Read the DMA Count Registers */
 538         status = read_ram(port->port->serial->dev, port->dma_address,
 539                                                 sizeof(*oedb), (void *)oedb);
 540         if (status)
 541                 goto exit_is_tx_active;
 542
 543         dbg("%s - XByteCount    0x%X", __func__, oedb->XByteCount);
 544
 545         /* and the LSR */
 546         status = read_ram(port->port->serial->dev,
 547                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
 548
 549         if (status)
 550                 goto exit_is_tx_active;
 551         dbg("%s - LSR = 0x%X", __func__, *lsr);
 552
 553         /* If either buffer has data or we are transmitting then return TRUE */
 554         if ((oedb->XByteCount & 0x80) != 0)
 555                 bytes_left += 64;
 556
 557         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
 558                 bytes_left += 1;
 559
 560         /* We return Not Active if we get any kind of error */
 561 exit_is_tx_active:
 562         dbg("%s - return %d", __func__, bytes_left);
 563
 564         kfree(lsr);
 565         kfree(oedb);
 566         return bytes_left;
 567 }
 568
 569 static void chase_port(struct edgeport_port *port, unsigned long timeout,
 570                                                                 int flush)
 571 {
 572         int baud_rate;
 573         struct tty_struct *tty = tty_port_tty_get(&port->port->port);
 574         wait_queue_t wait;
 575         unsigned long flags;
 576
 577         if (!timeout)
 578                 timeout = (HZ * EDGE_CLOSING_WAIT)/100;
 579
 580         /* wait for data to drain from the buffer */
 581         spin_lock_irqsave(&port->ep_lock, flags);
 582         init_waitqueue_entry(&wait, current);
 583         add_wait_queue(&tty->write_wait, &wait);
 584         for (;;) {
 585                 set_current_state(TASK_INTERRUPTIBLE);
 586                 if (edge_buf_data_avail(port->ep_out_buf) == 0
 587                 || timeout == 0 || signal_pending(current)
 588                 || !usb_get_intfdata(port->port->serial->interface))
 589                         /* disconnect */
 590                         break;
 591                 spin_unlock_irqrestore(&port->ep_lock, flags);
 592                 timeout = schedule_timeout(timeout);
 593                 spin_lock_irqsave(&port->ep_lock, flags);
 594         }
 595         set_current_state(TASK_RUNNING);
 596         remove_wait_queue(&tty->write_wait, &wait);
 597         if (flush)
 598                 edge_buf_clear(port->ep_out_buf);
 599         spin_unlock_irqrestore(&port->ep_lock, flags);
 600         tty_kref_put(tty);
 601
 602         /* wait for data to drain from the device */
 603         timeout += jiffies;
 604         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
 605         && usb_get_intfdata(port->port->serial->interface)) {
 606                 /* not disconnected */
 607                 if (!tx_active(port))
 608                         break;
 609                 msleep(10);
 610         }
 611
 612         /* disconnected */
 613         if (!usb_get_intfdata(port->port->serial->interface))
 614                 return;
 615
 616         /* wait one more character time, based on baud rate */
 617         /* (tx_active doesn't seem to wait for the last byte) */
 618         baud_rate = port->baud_rate;
 619         if (baud_rate == 0)
 620                 baud_rate = 50;
 621         msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
 622 }
 623
 624 static int choose_config(struct usb_device *dev)
 625 {
 626         /*
 627          * There may be multiple configurations on this device, in which case
 628          * we would need to read and parse all of them to find out which one
 629          * we want. However, we just support one config at this point,
 630          * configuration # 1, which is Config Descriptor 0.
 631          */
 632
 633         dbg("%s - Number of Interfaces = %d",
 634                                 __func__, dev->config->desc.bNumInterfaces);
 635         dbg("%s - MAX Power            = %d",
 636                                 __func__, dev->config->desc.bMaxPower * 2);
 637
 638         if (dev->config->desc.bNumInterfaces != 1) {
 639                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n",
 640                                                                 __func__);
 641                 return -ENODEV;
 642         }
 643
 644         return 0;
 645 }
 646
 647 static int read_rom(struct edgeport_serial *serial,
 648                                 int start_address, int length, __u8 *buffer)
 649 {
 650         int status;
 651
 652         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 653                 status = read_download_mem(serial->serial->dev,
 654                                                start_address,
 655                                                length,
 656                                                serial->TI_I2C_Type,
 657                                                buffer);
 658         } else {
 659                 status = read_boot_mem(serial, start_address, length,
 660                                                                 buffer);
 661         }
 662         return status;
 663 }
 664
 665 static int write_rom(struct edgeport_serial *serial, int start_address,
 666                                                 int length, __u8 *buffer)
 667 {
 668         if (serial->product_info.TiMode == TI_MODE_BOOT)
 669                 return write_boot_mem(serial, start_address, length,
 670                                                                 buffer);
 671
 672         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 673                 return write_i2c_mem(serial, start_address, length,
 674                                                 serial->TI_I2C_Type, buffer);
 675         return -EINVAL;
 676 }
 677
 678
 679
 680 /* Read a descriptor header from I2C based on type */
 681 static int get_descriptor_addr(struct edgeport_serial *serial,
 682                                 int desc_type, struct ti_i2c_desc *rom_desc)
 683 {
 684         int start_address;
 685         int status;
 686
 687         /* Search for requested descriptor in I2C */
 688         start_address = 2;
 689         do {
 690                 status = read_rom(serial,
 691                                    start_address,
 692                                    sizeof(struct ti_i2c_desc),
 693                                    (__u8 *)rom_desc);
 694                 if (status)
 695                         return 0;
 696
 697                 if (rom_desc->Type == desc_type)
 698                         return start_address;
 699
 700                 start_address = start_address + sizeof(struct ti_i2c_desc)
 701                                                         + rom_desc->Size;
 702
 703         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 704
 705         return 0;
 706 }
 707
 708 /* Validate descriptor checksum */
 709 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 710 {
 711         __u16 i;
 712         __u8 cs = 0;
 713
 714         for (i = 0; i < rom_desc->Size; i++)
 715                 cs = (__u8)(cs + buffer[i]);
 716
 717         if (cs != rom_desc->CheckSum) {
 718                 dbg("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 719                 return -EINVAL;
 720         }
 721         return 0;
 722 }
 723
 724 /* Make sure that the I2C image is good */
 725 static int check_i2c_image(struct edgeport_serial *serial)
 726 {
 727         struct device *dev = &serial->serial->dev->dev;
 728         int status = 0;
 729         struct ti_i2c_desc *rom_desc;
 730         int start_address = 2;
 731         __u8 *buffer;
 732         __u16 ttype;
 733
 734         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 735         if (!rom_desc) {
 736                 dev_err(dev, "%s - out of memory\n", __func__);
 737                 return -ENOMEM;
 738         }
 739         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 740         if (!buffer) {
 741                 dev_err(dev, "%s - out of memory when allocating buffer\n",
 742                                                                 __func__);
 743                 kfree(rom_desc);
 744                 return -ENOMEM;
 745         }
 746
 747         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 748         status = read_rom(serial, 0, 1, buffer);
 749         if (status)
 750                 goto out;
 751
 752         if (*buffer != UMP5152 && *buffer != UMP3410) {
 753                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 754                 status = -ENODEV;
 755                 goto out;
 756         }
 757
 758         do {
 759                 /* Validate the I2C */
 760                 status = read_rom(serial,
 761                                 start_address,
 762                                 sizeof(struct ti_i2c_desc),
 763                                 (__u8 *)rom_desc);
 764                 if (status)
 765                         break;
 766
 767                 if ((start_address + sizeof(struct ti_i2c_desc) +
 768                                         rom_desc->Size) > TI_MAX_I2C_SIZE) {
 769                         status = -ENODEV;
 770                         dbg("%s - structure too big, erroring out.", __func__);
 771                         break;
 772                 }
 773
 774                 dbg("%s Type = 0x%x", __func__, rom_desc->Type);
 775
 776                 /* Skip type 2 record */
 777                 ttype = rom_desc->Type & 0x0f;
 778                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 779                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 780                         /* Read the descriptor data */
 781                         status = read_rom(serial, start_address +
 782                                                 sizeof(struct ti_i2c_desc),
 783                                                 rom_desc->Size, buffer);
 784                         if (status)
 785                                 break;
 786
 787                         status = valid_csum(rom_desc, buffer);
 788                         if (status)
 789                                 break;
 790                 }
 791                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 792                                                                 rom_desc->Size;
 793
 794         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 795                                 (start_address < TI_MAX_I2C_SIZE));
 796
 797         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 798                                 (start_address > TI_MAX_I2C_SIZE))
 799                 status = -ENODEV;
 800
 801 out:
 802         kfree(buffer);
 803         kfree(rom_desc);
 804         return status;
 805 }
 806
 807 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
 808 {
 809         int status;
 810         int start_address;
 811         struct ti_i2c_desc *rom_desc;
 812         struct edge_ti_manuf_descriptor *desc;
 813
 814         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 815         if (!rom_desc) {
 816                 dev_err(&serial->serial->dev->dev, "%s - out of memory\n",
 817                                                                 __func__);
 818                 return -ENOMEM;
 819         }
 820         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 821                                                                 rom_desc);
 822
 823         if (!start_address) {
 824                 dbg("%s - Edge Descriptor not found in I2C", __func__);
 825                 status = -ENODEV;
 826                 goto exit;
 827         }
 828
 829         /* Read the descriptor data */
 830         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 831                                                 rom_desc->Size, buffer);
 832         if (status)
 833                 goto exit;
 834
 835         status = valid_csum(rom_desc, buffer);
 836
 837         desc = (struct edge_ti_manuf_descriptor *)buffer;
 838         dbg("%s - IonConfig      0x%x", __func__, desc->IonConfig);
 839         dbg("%s - Version          %d", __func__, desc->Version);
 840         dbg("%s - Cpu/Board      0x%x", __func__, desc->CpuRev_BoardRev);
 841         dbg("%s - NumPorts         %d", __func__, desc->NumPorts);
 842         dbg("%s - NumVirtualPorts  %d", __func__, desc->NumVirtualPorts);
 843         dbg("%s - TotalPorts       %d", __func__, desc->TotalPorts);
 844
 845 exit:
 846         kfree(rom_desc);
 847         return status;
 848 }
 849
 850 /* Build firmware header used for firmware update */
 851 static int build_i2c_fw_hdr(__u8 *header, struct device *dev)
 852 {
 853         __u8 *buffer;
 854         int buffer_size;
 855         int i;
 856         int err;
 857         __u8 cs = 0;
 858         struct ti_i2c_desc *i2c_header;
 859         struct ti_i2c_image_header *img_header;
 860         struct ti_i2c_firmware_rec *firmware_rec;
 861         const struct firmware *fw;
 862         const char *fw_name = "edgeport/down3.bin";
 863
 864         /* In order to update the I2C firmware we must change the type 2 record
 865          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 866          * Then while in boot mode, the driver will download the latest
 867          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 868          * device comes back up in download mode the driver will cause the new
 869          * firmware to be copied from the UMP Ram to I2C and the firmware will
 870          * update the record type from 0xf2 to 0x02.
 871          */
 872
 873         /* Allocate a 15.5k buffer + 2 bytes for version number
 874          * (Firmware Record) */
 875         buffer_size = (((1024 * 16) - 512 ) +
 876                         sizeof(struct ti_i2c_firmware_rec));
 877
 878         buffer = kmalloc(buffer_size, GFP_KERNEL);
 879         if (!buffer) {
 880                 dev_err(dev, "%s - out of memory\n", __func__);
 881                 return -ENOMEM;
 882         }
 883
 884         // Set entire image of 0xffs
 885         memset(buffer, 0xff, buffer_size);
 886
 887         err = request_firmware(&fw, fw_name, dev);
 888         if (err) {
 889                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
 890                        fw_name, err);
 891                 kfree(buffer);
 892                 return err;
 893         }
 894
 895         /* Save Download Version Number */
 896         OperationalMajorVersion = fw->data[0];
 897         OperationalMinorVersion = fw->data[1];
 898         OperationalBuildNumber = fw->data[2] | (fw->data[3] << 8);
 899
 900         /* Copy version number into firmware record */
 901         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 902
 903         firmware_rec->Ver_Major = OperationalMajorVersion;
 904         firmware_rec->Ver_Minor = OperationalMinorVersion;
 905
 906         /* Pointer to fw_down memory image */
 907         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 908
 909         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 910                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 911                 le16_to_cpu(img_header->Length));
 912
 913         release_firmware(fw);
 914
 915         for (i=0; i < buffer_size; i++) {
 916                 cs = (__u8)(cs + buffer[i]);
 917         }
 918
 919         kfree(buffer);
 920
 921         /* Build new header */
 922         i2c_header =  (struct ti_i2c_desc *)header;
 923         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 924
 925         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 926         i2c_header->Size        = (__u16)buffer_size;
 927         i2c_header->CheckSum    = cs;
 928         firmware_rec->Ver_Major = OperationalMajorVersion;
 929         firmware_rec->Ver_Minor = OperationalMinorVersion;
 930
 931         return 0;
 932 }
 933
 934 /* Try to figure out what type of I2c we have */
 935 static int i2c_type_bootmode(struct edgeport_serial *serial)
 936 {
 937         int status;
 938         __u8 data;
 939
 940         /* Try to read type 2 */
 941         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 942                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, &data, 0x01);
 943         if (status)
 944                 dbg("%s - read 2 status error = %d", __func__, status);
 945         else
 946                 dbg("%s - read 2 data = 0x%x", __func__, data);
 947         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 948                 dbg("%s - ROM_TYPE_II", __func__);
 949                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 950                 return 0;
 951         }
 952
 953         /* Try to read type 3 */
 954         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 955                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, &data, 0x01);
 956         if (status)
 957                 dbg("%s - read 3 status error = %d", __func__, status);
 958         else
 959                 dbg("%s - read 2 data = 0x%x", __func__, data);
 960         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 961                 dbg("%s - ROM_TYPE_III", __func__);
 962                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 963                 return 0;
 964         }
 965
 966         dbg("%s - Unknown", __func__);
 967         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 968         return -ENODEV;
 969 }
 970
 971 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 972                                                 int length, int *num_sent)
 973 {
 974         int status;
 975
 976         status = usb_bulk_msg(serial->dev,
 977                         usb_sndbulkpipe(serial->dev,
 978                                 serial->port[0]->bulk_out_endpointAddress),
 979                         buffer, length, num_sent, 1000);
 980         return status;
 981 }
 982
 983 /* Download given firmware image to the device (IN BOOT MODE) */
 984 static int download_code(struct edgeport_serial *serial, __u8 *image,
 985                                                         int image_length)
 986 {
 987         int status = 0;
 988         int pos;
 989         int transfer;
 990         int done;
 991
 992         /* Transfer firmware image */
 993         for (pos = 0; pos < image_length; ) {
 994                 /* Read the next buffer from file */
 995                 transfer = image_length - pos;
 996                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 997                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
 998
 999                 /* Transfer data */
1000                 status = bulk_xfer(serial->serial, &image[pos],
1001                                                         transfer, &done);
1002                 if (status)
1003                         break;
1004                 /* Advance buffer pointer */
1005                 pos += done;
1006         }
1007
1008         return status;
1009 }
1010
1011 /* FIXME!!! */
1012 static int config_boot_dev(struct usb_device *dev)
1013 {
1014         return 0;
1015 }
1016
1017 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
1018 {
1019         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
1020 }
1021
1022 /**
1023  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1024  *
1025  * This routine downloads the main operating code into the TI5052, using the
1026  * boot code already burned into E2PROM or ROM.
1027  */
1028 static int download_fw(struct edgeport_serial *serial)
1029 {
1030         struct device *dev = &serial->serial->dev->dev;
1031         int status = 0;
1032         int start_address;
1033         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1034         struct usb_interface_descriptor *interface;
1035         int download_cur_ver;
1036         int download_new_ver;
1037
1038         /* This routine is entered by both the BOOT mode and the Download mode
1039          * We can determine which code is running by the reading the config
1040          * descriptor and if we have only one bulk pipe it is in boot mode
1041          */
1042         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1043
1044         /* Default to type 2 i2c */
1045         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1046
1047         status = choose_config(serial->serial->dev);
1048         if (status)
1049                 return status;
1050
1051         interface = &serial->serial->interface->cur_altsetting->desc;
1052         if (!interface) {
1053                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1054                 return -ENODEV;
1055         }
1056
1057         /*
1058          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1059          * if we have more than one endpoint we are definitely in download
1060          * mode
1061          */
1062         if (interface->bNumEndpoints > 1)
1063                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1064         else
1065                 /* Otherwise we will remain in configuring mode */
1066                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1067
1068         /********************************************************************/
1069         /* Download Mode */
1070         /********************************************************************/
1071         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1072                 struct ti_i2c_desc *rom_desc;
1073
1074                 dbg("%s - RUNNING IN DOWNLOAD MODE", __func__);
1075
1076                 status = check_i2c_image(serial);
1077                 if (status) {
1078                         dbg("%s - DOWNLOAD MODE -- BAD I2C", __func__);
1079                         return status;
1080                 }
1081
1082                 /* Validate Hardware version number
1083                  * Read Manufacturing Descriptor from TI Based Edgeport
1084                  */
1085                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1086                 if (!ti_manuf_desc) {
1087                         dev_err(dev, "%s - out of memory.\n", __func__);
1088                         return -ENOMEM;
1089                 }
1090                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1091                 if (status) {
1092                         kfree(ti_manuf_desc);
1093                         return status;
1094                 }
1095
1096                 /* Check version number of ION descriptor */
1097                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1098                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1099                                 __func__, ti_cpu_rev(ti_manuf_desc));
1100                         kfree(ti_manuf_desc);
1101                         return -EINVAL;
1102                 }
1103
1104                 rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1105                 if (!rom_desc) {
1106                         dev_err(dev, "%s - out of memory.\n", __func__);
1107                         kfree(ti_manuf_desc);
1108                         return -ENOMEM;
1109                 }
1110
1111                 /* Search for type 2 record (firmware record) */
1112                 start_address = get_descriptor_addr(serial,
1113                                 I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1114                 if (start_address != 0) {
1115                         struct ti_i2c_firmware_rec *firmware_version;
1116                         __u8 record;
1117
1118                         dbg("%s - Found Type FIRMWARE (Type 2) record",
1119                                                                 __func__);
1120
1121                         firmware_version = kmalloc(sizeof(*firmware_version),
1122                                                                 GFP_KERNEL);
1123                         if (!firmware_version) {
1124                                 dev_err(dev, "%s - out of memory.\n", __func__);
1125                                 kfree(rom_desc);
1126                                 kfree(ti_manuf_desc);
1127                                 return -ENOMEM;
1128                         }
1129
1130                         /* Validate version number
1131                          * Read the descriptor data
1132                          */
1133                         status = read_rom(serial, start_address +
1134                                         sizeof(struct ti_i2c_desc),
1135                                         sizeof(struct ti_i2c_firmware_rec),
1136                                         (__u8 *)firmware_version);
1137                         if (status) {
1138                                 kfree(firmware_version);
1139                                 kfree(rom_desc);
1140                                 kfree(ti_manuf_desc);
1141                                 return status;
1142                         }
1143
1144                         /* Check version number of download with current
1145                            version in I2c */
1146                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1147                                            (firmware_version->Ver_Minor);
1148                         download_new_ver = (OperationalMajorVersion << 8) +
1149                                            (OperationalMinorVersion);
1150
1151                         dbg("%s - >> FW Versions Device %d.%d  Driver %d.%d",
1152                             __func__,
1153                             firmware_version->Ver_Major,
1154                             firmware_version->Ver_Minor,
1155                             OperationalMajorVersion,
1156                             OperationalMinorVersion);
1157
1158                         /* Check if we have an old version in the I2C and
1159                            update if necessary */
1160                         if (download_cur_ver != download_new_ver) {
1161                                 dbg("%s - Update I2C dld from %d.%d to %d.%d",
1162                                     __func__,
1163                                     firmware_version->Ver_Major,
1164                                     firmware_version->Ver_Minor,
1165                                     OperationalMajorVersion,
1166                                     OperationalMinorVersion);
1167
1168                                 /* In order to update the I2C firmware we must
1169                                  * change the type 2 record to type 0xF2. This
1170                                  * will force the UMP to come up in Boot Mode.
1171                                  * Then while in boot mode, the driver will
1172                                  * download the latest firmware (padded to
1173                                  * 15.5k) into the UMP ram. Finally when the
1174                                  * device comes back up in download mode the
1175                                  * driver will cause the new firmware to be
1176                                  * copied from the UMP Ram to I2C and the
1177                                  * firmware will update the record type from
1178                                  * 0xf2 to 0x02.
1179                                  */
1180                                 record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1181
1182                                 /* Change the I2C Firmware record type to
1183                                    0xf2 to trigger an update */
1184                                 status = write_rom(serial, start_address,
1185                                                 sizeof(record), &record);
1186                                 if (status) {
1187                                         kfree(firmware_version);
1188                                         kfree(rom_desc);
1189                                         kfree(ti_manuf_desc);
1190                                         return status;
1191                                 }
1192
1193                                 /* verify the write -- must do this in order
1194                                  * for write to complete before we do the
1195                                  * hardware reset
1196                                  */
1197                                 status = read_rom(serial,
1198                                                         start_address,
1199                                                         sizeof(record),
1200                                                         &record);
1201                                 if (status) {
1202                                         kfree(firmware_version);
1203                                         kfree(rom_desc);
1204                                         kfree(ti_manuf_desc);
1205                                         return status;
1206                                 }
1207
1208                                 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1209                                         dev_err(dev,
1210                                                 "%s - error resetting device\n",
1211                                                 __func__);
1212                                         kfree(firmware_version);
1213                                         kfree(rom_desc);
1214                                         kfree(ti_manuf_desc);
1215                                         return -ENODEV;
1216                                 }
1217
1218                                 dbg("%s - HARDWARE RESET", __func__);
1219
1220                                 /* Reset UMP -- Back to BOOT MODE */
1221                                 status = ti_vsend_sync(serial->serial->dev,
1222                                                 UMPC_HARDWARE_RESET,
1223                                                 0, 0, NULL, 0);
1224
1225                                 dbg("%s - HARDWARE RESET return %d",
1226                                                 __func__, status);
1227
1228                                 /* return an error on purpose. */
1229                                 kfree(firmware_version);
1230                                 kfree(rom_desc);
1231                                 kfree(ti_manuf_desc);
1232                                 return -ENODEV;
1233                         }
1234                         kfree(firmware_version);
1235                 }
1236                 /* Search for type 0xF2 record (firmware blank record) */
1237                 else if ((start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1238 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1239                                         sizeof(struct ti_i2c_firmware_rec))
1240                         __u8 *header;
1241                         __u8 *vheader;
1242
1243                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1244                         if (!header) {
1245                                 dev_err(dev, "%s - out of memory.\n", __func__);
1246                                 kfree(rom_desc);
1247                                 kfree(ti_manuf_desc);
1248                                 return -ENOMEM;
1249                         }
1250
1251                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1252                         if (!vheader) {
1253                                 dev_err(dev, "%s - out of memory.\n", __func__);
1254                                 kfree(header);
1255                                 kfree(rom_desc);
1256                                 kfree(ti_manuf_desc);
1257                                 return -ENOMEM;
1258                         }
1259
1260                         dbg("%s - Found Type BLANK FIRMWARE (Type F2) record",
1261                                                                 __func__);
1262
1263                         /*
1264                          * In order to update the I2C firmware we must change
1265                          * the type 2 record to type 0xF2. This will force the
1266                          * UMP to come up in Boot Mode.  Then while in boot
1267                          * mode, the driver will download the latest firmware
1268                          * (padded to 15.5k) into the UMP ram. Finally when the
1269                          * device comes back up in download mode the driver
1270                          * will cause the new firmware to be copied from the
1271                          * UMP Ram to I2C and the firmware will update the
1272                          * record type from 0xf2 to 0x02.
1273                          */
1274                         status = build_i2c_fw_hdr(header, dev);
1275                         if (status) {
1276                                 kfree(vheader);
1277                                 kfree(header);
1278                                 kfree(rom_desc);
1279                                 kfree(ti_manuf_desc);
1280                                 return status;
1281                         }
1282
1283                         /* Update I2C with type 0xf2 record with correct
1284                            size and checksum */
1285                         status = write_rom(serial,
1286                                                 start_address,
1287                                                 HEADER_SIZE,
1288                                                 header);
1289                         if (status) {
1290                                 kfree(vheader);
1291                                 kfree(header);
1292                                 kfree(rom_desc);
1293                                 kfree(ti_manuf_desc);
1294                                 return status;
1295                         }
1296
1297                         /* verify the write -- must do this in order for
1298                            write to complete before we do the hardware reset */
1299                         status = read_rom(serial, start_address,
1300                                                         HEADER_SIZE, vheader);
1301
1302                         if (status) {
1303                                 dbg("%s - can't read header back", __func__);
1304                                 kfree(vheader);
1305                                 kfree(header);
1306                                 kfree(rom_desc);
1307                                 kfree(ti_manuf_desc);
1308                                 return status;
1309                         }
1310                         if (memcmp(vheader, header, HEADER_SIZE)) {
1311                                 dbg("%s - write download record failed",
1312                                         __func__);
1313                                 kfree(vheader);
1314                                 kfree(header);
1315                                 kfree(rom_desc);
1316                                 kfree(ti_manuf_desc);
1317                                 return status;
1318                         }
1319
1320                         kfree(vheader);
1321                         kfree(header);
1322
1323                         dbg("%s - Start firmware update", __func__);
1324
1325                         /* Tell firmware to copy download image into I2C */
1326                         status = ti_vsend_sync(serial->serial->dev,
1327                                         UMPC_COPY_DNLD_TO_I2C, 0, 0, NULL, 0);
1328
1329                         dbg("%s - Update complete 0x%x", __func__, status);
1330                         if (status) {
1331                                 dev_err(dev,
1332                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1333                                                                 __func__);
1334                                 kfree(rom_desc);
1335                                 kfree(ti_manuf_desc);
1336                                 return status;
1337                         }
1338                 }
1339
1340                 // The device is running the download code
1341                 kfree(rom_desc);
1342                 kfree(ti_manuf_desc);
1343                 return 0;
1344         }
1345
1346         /********************************************************************/
1347         /* Boot Mode */
1348         /********************************************************************/
1349         dbg("%s - RUNNING IN BOOT MODE", __func__);
1350
1351         /* Configure the TI device so we can use the BULK pipes for download */
1352         status = config_boot_dev(serial->serial->dev);
1353         if (status)
1354                 return status;
1355
1356         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1357                                                         != USB_VENDOR_ID_ION) {
1358                 dbg("%s - VID = 0x%x", __func__,
1359                      le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1360                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1361                 goto stayinbootmode;
1362         }
1363
1364         /* We have an ION device (I2c Must be programmed)
1365            Determine I2C image type */
1366         if (i2c_type_bootmode(serial))
1367                 goto stayinbootmode;
1368
1369         /* Check for ION Vendor ID and that the I2C is valid */
1370         if (!check_i2c_image(serial)) {
1371                 struct ti_i2c_image_header *header;
1372                 int i;
1373                 __u8 cs = 0;
1374                 __u8 *buffer;
1375                 int buffer_size;
1376                 int err;
1377                 const struct firmware *fw;
1378                 const char *fw_name = "edgeport/down3.bin";
1379
1380                 /* Validate Hardware version number
1381                  * Read Manufacturing Descriptor from TI Based Edgeport
1382                  */
1383                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1384                 if (!ti_manuf_desc) {
1385                         dev_err(dev, "%s - out of memory.\n", __func__);
1386                         return -ENOMEM;
1387                 }
1388                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1389                 if (status) {
1390                         kfree(ti_manuf_desc);
1391                         goto stayinbootmode;
1392                 }
1393
1394                 /* Check for version 2 */
1395                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1396                         dbg("%s - Wrong CPU Rev %d (Must be 2)",
1397                                         __func__, ti_cpu_rev(ti_manuf_desc));
1398                         kfree(ti_manuf_desc);
1399                         goto stayinbootmode;
1400                 }
1401
1402                 kfree(ti_manuf_desc);
1403
1404                 /*
1405                  * In order to update the I2C firmware we must change the type
1406                  * 2 record to type 0xF2. This will force the UMP to come up
1407                  * in Boot Mode.  Then while in boot mode, the driver will
1408                  * download the latest firmware (padded to 15.5k) into the
1409                  * UMP ram. Finally when the device comes back up in download
1410                  * mode the driver will cause the new firmware to be copied
1411                  * from the UMP Ram to I2C and the firmware will update the
1412                  * record type from 0xf2 to 0x02.
1413                  *
1414                  * Do we really have to copy the whole firmware image,
1415                  * or could we do this in place!
1416                  */
1417
1418                 /* Allocate a 15.5k buffer + 3 byte header */
1419                 buffer_size = (((1024 * 16) - 512) +
1420                                         sizeof(struct ti_i2c_image_header));
1421                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1422                 if (!buffer) {
1423                         dev_err(dev, "%s - out of memory\n", __func__);
1424                         return -ENOMEM;
1425                 }
1426
1427                 /* Initialize the buffer to 0xff (pad the buffer) */
1428                 memset(buffer, 0xff, buffer_size);
1429
1430                 err = request_firmware(&fw, fw_name, dev);
1431                 if (err) {
1432                         printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
1433                                fw_name, err);
1434                         kfree(buffer);
1435                         return err;
1436                 }
1437                 memcpy(buffer, &fw->data[4], fw->size - 4);
1438                 release_firmware(fw);
1439
1440                 for (i = sizeof(struct ti_i2c_image_header);
1441                                 i < buffer_size; i++) {
1442                         cs = (__u8)(cs + buffer[i]);
1443                 }
1444
1445                 header = (struct ti_i2c_image_header *)buffer;
1446
1447                 /* update length and checksum after padding */
1448                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1449                                         sizeof(struct ti_i2c_image_header)));
1450                 header->CheckSum = cs;
1451
1452                 /* Download the operational code  */
1453                 dbg("%s - Downloading operational code image (TI UMP)",
1454                                                                 __func__);
1455                 status = download_code(serial, buffer, buffer_size);
1456
1457                 kfree(buffer);
1458
1459                 if (status) {
1460                         dbg("%s - Error downloading operational code image",
1461                                                                 __func__);
1462                         return status;
1463                 }
1464
1465                 /* Device will reboot */
1466                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1467
1468                 dbg("%s - Download successful -- Device rebooting...",
1469                                                                 __func__);
1470
1471                 /* return an error on purpose */
1472                 return -ENODEV;
1473         }
1474
1475 stayinbootmode:
1476         /* Eprom is invalid or blank stay in boot mode */
1477         dbg("%s - STAYING IN BOOT MODE", __func__);
1478         serial->product_info.TiMode = TI_MODE_BOOT;
1479
1480         return 0;
1481 }
1482
1483
1484 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1485 {
1486         int port_number = port->port->number - port->port->serial->minor;
1487         on = !!on;      /* 1 or 0 not bitmask */
1488         return send_cmd(port->port->serial->dev,
1489                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1490                         on, NULL, 0);
1491 }
1492
1493
1494 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1495 {
1496         int status = 0;
1497
1498         dbg("%s - %x", __func__, mcr);
1499
1500         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1501         if (status)
1502                 return status;
1503         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1504         if (status)
1505                 return status;
1506         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1507 }
1508
1509 /* Convert TI LSR to standard UART flags */
1510 static __u8 map_line_status(__u8 ti_lsr)
1511 {
1512         __u8 lsr = 0;
1513
1514 #define MAP_FLAG(flagUmp, flagUart)    \
1515         if (ti_lsr & flagUmp) \
1516                 lsr |= flagUart;
1517
1518         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1519         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1520         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1521         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1522         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1523         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1524
1525 #undef MAP_FLAG
1526
1527         return lsr;
1528 }
1529
1530 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1531 {
1532         struct async_icount *icount;
1533         struct tty_struct *tty;
1534
1535         dbg("%s - %02x", __func__, msr);
1536
1537         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1538                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1539                 icount = &edge_port->icount;
1540
1541                 /* update input line counters */
1542                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1543                         icount->cts++;
1544                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1545                         icount->dsr++;
1546                 if (msr & EDGEPORT_MSR_DELTA_CD)
1547                         icount->dcd++;
1548                 if (msr & EDGEPORT_MSR_DELTA_RI)
1549                         icount->rng++;
1550                 wake_up_interruptible(&edge_port->delta_msr_wait);
1551         }
1552
1553         /* Save the new modem status */
1554         edge_port->shadow_msr = msr & 0xf0;
1555
1556         tty = tty_port_tty_get(&edge_port->port->port);
1557         /* handle CTS flow control */
1558         if (tty && C_CRTSCTS(tty)) {
1559                 if (msr & EDGEPORT_MSR_CTS) {
1560                         tty->hw_stopped = 0;
1561                         tty_wakeup(tty);
1562                 } else {
1563                         tty->hw_stopped = 1;
1564                 }
1565         }
1566         tty_kref_put(tty);
1567
1568         return;
1569 }
1570
1571 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1572                                                         __u8 lsr, __u8 data)
1573 {
1574         struct async_icount *icount;
1575         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1576                                                 LSR_FRM_ERR | LSR_BREAK));
1577         struct tty_struct *tty;
1578
1579         dbg("%s - %02x", __func__, new_lsr);
1580
1581         edge_port->shadow_lsr = lsr;
1582
1583         if (new_lsr & LSR_BREAK)
1584                 /*
1585                  * Parity and Framing errors only count if they
1586                  * occur exclusive of a break being received.
1587                  */
1588                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1589
1590         /* Place LSR data byte into Rx buffer */
1591         if (lsr_data) {
1592                 tty = tty_port_tty_get(&edge_port->port->port);
1593                 if (tty) {
1594                         edge_tty_recv(&edge_port->port->dev, tty, &data, 1);
1595                         tty_kref_put(tty);
1596                 }
1597         }
1598
1599         /* update input line counters */
1600         icount = &edge_port->icount;
1601         if (new_lsr & LSR_BREAK)
1602                 icount->brk++;
1603         if (new_lsr & LSR_OVER_ERR)
1604                 icount->overrun++;
1605         if (new_lsr & LSR_PAR_ERR)
1606                 icount->parity++;
1607         if (new_lsr & LSR_FRM_ERR)
1608                 icount->frame++;
1609 }
1610
1611
1612 static void edge_interrupt_callback(struct urb *urb)
1613 {
1614         struct edgeport_serial *edge_serial = urb->context;
1615         struct usb_serial_port *port;
1616         struct edgeport_port *edge_port;
1617         unsigned char *data = urb->transfer_buffer;
1618         int length = urb->actual_length;
1619         int port_number;
1620         int function;
1621         int retval;
1622         __u8 lsr;
1623         __u8 msr;
1624         int status = urb->status;
1625
1626         dbg("%s", __func__);
1627
1628         switch (status) {
1629         case 0:
1630                 /* success */
1631                 break;
1632         case -ECONNRESET:
1633         case -ENOENT:
1634         case -ESHUTDOWN:
1635                 /* this urb is terminated, clean up */
1636                 dbg("%s - urb shutting down with status: %d",
1637                     __func__, status);
1638                 return;
1639         default:
1640                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1641                         "%d\n", __func__, status);
1642                 goto exit;
1643         }
1644
1645         if (!length) {
1646                 dbg("%s - no data in urb", __func__);
1647                 goto exit;
1648         }
1649
1650         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev,
1651                                                 __func__, length, data);
1652
1653         if (length != 2) {
1654                 dbg("%s - expecting packet of size 2, got %d",
1655                                                         __func__, length);
1656                 goto exit;
1657         }
1658
1659         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1660         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1661         dbg("%s - port_number %d, function %d, info 0x%x",
1662              __func__, port_number, function, data[1]);
1663         port = edge_serial->serial->port[port_number];
1664         edge_port = usb_get_serial_port_data(port);
1665         if (!edge_port) {
1666                 dbg("%s - edge_port not found", __func__);
1667                 return;
1668         }
1669         switch (function) {
1670         case TIUMP_INTERRUPT_CODE_LSR:
1671                 lsr = map_line_status(data[1]);
1672                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1673                         /* Save the LSR event for bulk read
1674                            completion routine */
1675                         dbg("%s - LSR Event Port %u LSR Status = %02x",
1676                              __func__, port_number, lsr);
1677                         edge_port->lsr_event = 1;
1678                         edge_port->lsr_mask = lsr;
1679                 } else {
1680                         dbg("%s - ===== Port %d LSR Status = %02x ======",
1681                              __func__, port_number, lsr);
1682                         handle_new_lsr(edge_port, 0, lsr, 0);
1683                 }
1684                 break;
1685
1686         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1687                 /* Copy MSR from UMP */
1688                 msr = data[1];
1689                 dbg("%s - ===== Port %u MSR Status = %02x ======\n",
1690                      __func__, port_number, msr);
1691                 handle_new_msr(edge_port, msr);
1692                 break;
1693
1694         default:
1695                 dev_err(&urb->dev->dev,
1696                         "%s - Unknown Interrupt code from UMP %x\n",
1697                         __func__, data[1]);
1698                 break;
1699
1700         }
1701
1702 exit:
1703         retval = usb_submit_urb(urb, GFP_ATOMIC);
1704         if (retval)
1705                 dev_err(&urb->dev->dev,
1706                         "%s - usb_submit_urb failed with result %d\n",
1707                          __func__, retval);
1708 }
1709
1710 static void edge_bulk_in_callback(struct urb *urb)
1711 {
1712         struct edgeport_port *edge_port = urb->context;
1713         unsigned char *data = urb->transfer_buffer;
1714         struct tty_struct *tty;
1715         int retval = 0;
1716         int port_number;
1717         int status = urb->status;
1718
1719         dbg("%s", __func__);
1720
1721         switch (status) {
1722         case 0:
1723                 /* success */
1724                 break;
1725         case -ECONNRESET:
1726         case -ENOENT:
1727         case -ESHUTDOWN:
1728                 /* this urb is terminated, clean up */
1729                 dbg("%s - urb shutting down with status: %d",
1730                     __func__, status);
1731                 return;
1732         default:
1733                 dev_err(&urb->dev->dev,
1734                         "%s - nonzero read bulk status received: %d\n",
1735                              __func__, status);
1736         }
1737
1738         if (status == -EPIPE)
1739                 goto exit;
1740
1741         if (status) {
1742                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1743                 return;
1744         }
1745
1746         port_number = edge_port->port->number - edge_port->port->serial->minor;
1747
1748         if (edge_port->lsr_event) {
1749                 edge_port->lsr_event = 0;
1750                 dbg("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1751                      __func__, port_number, edge_port->lsr_mask, *data);
1752                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1753                 /* Adjust buffer length/pointer */
1754                 --urb->actual_length;
1755                 ++data;
1756         }
1757
1758         tty = tty_port_tty_get(&edge_port->port->port);
1759         if (tty && urb->actual_length) {
1760                 usb_serial_debug_data(debug, &edge_port->port->dev,
1761                                         __func__, urb->actual_length, data);
1762                 if (edge_port->close_pending)
1763                         dbg("%s - close pending, dropping data on the floor",
1764                                                                 __func__);
1765                 else
1766                         edge_tty_recv(&edge_port->port->dev, tty, data,
1767                                                         urb->actual_length);
1768                 edge_port->icount.rx += urb->actual_length;
1769         }
1770         tty_kref_put(tty);
1771
1772 exit:
1773         /* continue read unless stopped */
1774         spin_lock(&edge_port->ep_lock);
1775         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1776                 urb->dev = edge_port->port->serial->dev;
1777                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1778         } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1779                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1780         }
1781         spin_unlock(&edge_port->ep_lock);
1782         if (retval)
1783                 dev_err(&urb->dev->dev,
1784                         "%s - usb_submit_urb failed with result %d\n",
1785                          __func__, retval);
1786 }
1787
1788 static void edge_tty_recv(struct device *dev, struct tty_struct *tty,
1789                                         unsigned char *data, int length)
1790 {
1791         int queued;
1792
1793         tty_buffer_request_room(tty, length);
1794         queued = tty_insert_flip_string(tty, data, length);
1795         if (queued < length)
1796                 dev_err(dev, "%s - dropping data, %d bytes lost\n",
1797                         __func__, length - queued);
1798         tty_flip_buffer_push(tty);
1799 }
1800
1801 static void edge_bulk_out_callback(struct urb *urb)
1802 {
1803         struct usb_serial_port *port = urb->context;
1804         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1805         int status = urb->status;
1806         struct tty_struct *tty;
1807
1808         dbg("%s - port %d", __func__, port->number);
1809
1810         edge_port->ep_write_urb_in_use = 0;
1811
1812         switch (status) {
1813         case 0:
1814                 /* success */
1815                 break;
1816         case -ECONNRESET:
1817         case -ENOENT:
1818         case -ESHUTDOWN:
1819                 /* this urb is terminated, clean up */
1820                 dbg("%s - urb shutting down with status: %d",
1821                     __func__, status);
1822                 return;
1823         default:
1824                 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1825                         "received: %d\n", __func__, status);
1826         }
1827
1828         /* send any buffered data */
1829         tty = tty_port_tty_get(&port->port);
1830         edge_send(tty);
1831         tty_kref_put(tty);
1832 }
1833
1834 static int edge_open(struct tty_struct *tty,
1835                         struct usb_serial_port *port, struct file *filp)
1836 {
1837         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1838         struct edgeport_serial *edge_serial;
1839         struct usb_device *dev;
1840         struct urb *urb;
1841         int port_number;
1842         int status;
1843         u16 open_settings;
1844         u8 transaction_timeout;
1845
1846         dbg("%s - port %d", __func__, port->number);
1847
1848         if (edge_port == NULL)
1849                 return -ENODEV;
1850
1851         port_number = port->number - port->serial->minor;
1852         switch (port_number) {
1853         case 0:
1854                 edge_port->uart_base = UMPMEM_BASE_UART1;
1855                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1856                 break;
1857         case 1:
1858                 edge_port->uart_base = UMPMEM_BASE_UART2;
1859                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1860                 break;
1861         default:
1862                 dev_err(&port->dev, "Unknown port number!!!\n");
1863                 return -ENODEV;
1864         }
1865
1866         dbg("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1867                                 __func__, port_number, edge_port->uart_base,
1868                                 edge_port->dma_address);
1869
1870         dev = port->serial->dev;
1871
1872         memset(&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1873         init_waitqueue_head(&edge_port->delta_msr_wait);
1874
1875         /* turn off loopback */
1876         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1877         if (status) {
1878                 dev_err(&port->dev,
1879                                 "%s - cannot send clear loopback command, %d\n",
1880                         __func__, status);
1881                 return status;
1882         }
1883
1884         /* set up the port settings */
1885         if (tty)
1886                 edge_set_termios(tty, port, tty->termios);
1887
1888         /* open up the port */
1889
1890         /* milliseconds to timeout for DMA transfer */
1891         transaction_timeout = 2;
1892
1893         edge_port->ump_read_timeout =
1894                                 max(20, ((transaction_timeout * 3) / 2));
1895
1896         /* milliseconds to timeout for DMA transfer */
1897         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1898                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1899                              (transaction_timeout << 2));
1900
1901         dbg("%s - Sending UMPC_OPEN_PORT", __func__);
1902
1903         /* Tell TI to open and start the port */
1904         status = send_cmd(dev, UMPC_OPEN_PORT,
1905                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1906         if (status) {
1907                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1908                                                         __func__, status);
1909                 return status;
1910         }
1911
1912         /* Start the DMA? */
1913         status = send_cmd(dev, UMPC_START_PORT,
1914                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1915         if (status) {
1916                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1917                                                         __func__, status);
1918                 return status;
1919         }
1920
1921         /* Clear TX and RX buffers in UMP */
1922         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1923         if (status) {
1924                 dev_err(&port->dev,
1925                         "%s - cannot send clear buffers command, %d\n",
1926                         __func__, status);
1927                 return status;
1928         }
1929
1930         /* Read Initial MSR */
1931         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1932                                 (__u16)(UMPM_UART1_PORT + port_number),
1933                                 &edge_port->shadow_msr, 1);
1934         if (status) {
1935                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1936                                                         __func__, status);
1937                 return status;
1938         }
1939
1940         dbg("ShadowMSR 0x%X", edge_port->shadow_msr);
1941
1942         /* Set Initial MCR */
1943         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1944         dbg("ShadowMCR 0x%X", edge_port->shadow_mcr);
1945
1946         edge_serial = edge_port->edge_serial;
1947         if (mutex_lock_interruptible(&edge_serial->es_lock))
1948                 return -ERESTARTSYS;
1949         if (edge_serial->num_ports_open == 0) {
1950                 /* we are the first port to open, post the interrupt urb */
1951                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1952                 if (!urb) {
1953                         dev_err(&port->dev,
1954                                 "%s - no interrupt urb present, exiting\n",
1955                                 __func__);
1956                         status = -EINVAL;
1957                         goto release_es_lock;
1958                 }
1959                 urb->complete = edge_interrupt_callback;
1960                 urb->context = edge_serial;
1961                 urb->dev = dev;
1962                 status = usb_submit_urb(urb, GFP_KERNEL);
1963                 if (status) {
1964                         dev_err(&port->dev,
1965                                 "%s - usb_submit_urb failed with value %d\n",
1966                                         __func__, status);
1967                         goto release_es_lock;
1968                 }
1969         }
1970
1971         /*
1972          * reset the data toggle on the bulk endpoints to work around bug in
1973          * host controllers where things get out of sync some times
1974          */
1975         usb_clear_halt(dev, port->write_urb->pipe);
1976         usb_clear_halt(dev, port->read_urb->pipe);
1977
1978         /* start up our bulk read urb */
1979         urb = port->read_urb;
1980         if (!urb) {
1981                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1982                                                                 __func__);
1983                 status = -EINVAL;
1984                 goto unlink_int_urb;
1985         }
1986         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1987         urb->complete = edge_bulk_in_callback;
1988         urb->context = edge_port;
1989         urb->dev = dev;
1990         status = usb_submit_urb(urb, GFP_KERNEL);
1991         if (status) {
1992                 dev_err(&port->dev,
1993                         "%s - read bulk usb_submit_urb failed with value %d\n",
1994                                 __func__, status);
1995                 goto unlink_int_urb;
1996         }
1997
1998         ++edge_serial->num_ports_open;
1999
2000         dbg("%s - exited", __func__);
2001
2002         goto release_es_lock;
2003
2004 unlink_int_urb:
2005         if (edge_port->edge_serial->num_ports_open == 0)
2006                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2007 release_es_lock:
2008         mutex_unlock(&edge_serial->es_lock);
2009         return status;
2010 }
2011
2012 static void edge_close(struct tty_struct *tty,
2013                         struct usb_serial_port *port, struct file *filp)
2014 {
2015         struct edgeport_serial *edge_serial;
2016         struct edgeport_port *edge_port;
2017         int port_number;
2018         int status;
2019
2020         dbg("%s - port %d", __func__, port->number);
2021
2022         edge_serial = usb_get_serial_data(port->serial);
2023         edge_port = usb_get_serial_port_data(port);
2024         if (edge_serial == NULL || edge_port == NULL)
2025                 return;
2026
2027         /* The bulkreadcompletion routine will check
2028          * this flag and dump add read data */
2029         edge_port->close_pending = 1;
2030
2031         /* chase the port close and flush */
2032         chase_port(edge_port, (HZ * closing_wait) / 100, 1);
2033
2034         usb_kill_urb(port->read_urb);
2035         usb_kill_urb(port->write_urb);
2036         edge_port->ep_write_urb_in_use = 0;
2037
2038         /* assuming we can still talk to the device,
2039          * send a close port command to it */
2040         dbg("%s - send umpc_close_port", __func__);
2041         port_number = port->number - port->serial->minor;
2042         status = send_cmd(port->serial->dev,
2043                                      UMPC_CLOSE_PORT,
2044                                      (__u8)(UMPM_UART1_PORT + port_number),
2045                                      0,
2046                                      NULL,
2047                                      0);
2048         mutex_lock(&edge_serial->es_lock);
2049         --edge_port->edge_serial->num_ports_open;
2050         if (edge_port->edge_serial->num_ports_open <= 0) {
2051                 /* last port is now closed, let's shut down our interrupt urb */
2052                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2053                 edge_port->edge_serial->num_ports_open = 0;
2054         }
2055         mutex_unlock(&edge_serial->es_lock);
2056         edge_port->close_pending = 0;
2057
2058         dbg("%s - exited", __func__);
2059 }
2060
2061 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2062                                 const unsigned char *data, int count)
2063 {
2064         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2065         unsigned long flags;
2066
2067         dbg("%s - port %d", __func__, port->number);
2068
2069         if (count == 0) {
2070                 dbg("%s - write request of 0 bytes", __func__);
2071                 return 0;
2072         }
2073
2074         if (edge_port == NULL)
2075                 return -ENODEV;
2076         if (edge_port->close_pending == 1)
2077                 return -ENODEV;
2078
2079         spin_lock_irqsave(&edge_port->ep_lock, flags);
2080         count = edge_buf_put(edge_port->ep_out_buf, data, count);
2081         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2082
2083         edge_send(tty);
2084
2085         return count;
2086 }
2087
2088 static void edge_send(struct tty_struct *tty)
2089 {
2090         struct usb_serial_port *port = tty->driver_data;
2091         int count, result;
2092         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2093         unsigned long flags;
2094
2095
2096         dbg("%s - port %d", __func__, port->number);
2097
2098         spin_lock_irqsave(&edge_port->ep_lock, flags);
2099
2100         if (edge_port->ep_write_urb_in_use) {
2101                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2102                 return;
2103         }
2104
2105         count = edge_buf_get(edge_port->ep_out_buf,
2106                                 port->write_urb->transfer_buffer,
2107                                 port->bulk_out_size);
2108
2109         if (count == 0) {
2110                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2111                 return;
2112         }
2113
2114         edge_port->ep_write_urb_in_use = 1;
2115
2116         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2117
2118         usb_serial_debug_data(debug, &port->dev, __func__, count,
2119                                 port->write_urb->transfer_buffer);
2120
2121         /* set up our urb */
2122         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
2123                            usb_sndbulkpipe(port->serial->dev,
2124                                             port->bulk_out_endpointAddress),
2125                            port->write_urb->transfer_buffer, count,
2126                            edge_bulk_out_callback,
2127                            port);
2128
2129         /* send the data out the bulk port */
2130         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2131         if (result) {
2132                 dev_err(&port->dev,
2133                         "%s - failed submitting write urb, error %d\n",
2134                                 __func__, result);
2135                 edge_port->ep_write_urb_in_use = 0;
2136                 /* TODO: reschedule edge_send */
2137         } else
2138                 edge_port->icount.tx += count;
2139
2140         /* wakeup any process waiting for writes to complete */
2141         /* there is now more room in the buffer for new writes */
2142         if (tty)
2143                 tty_wakeup(tty);
2144 }
2145
2146 static int edge_write_room(struct tty_struct *tty)
2147 {
2148         struct usb_serial_port *port = tty->driver_data;
2149         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2150         int room = 0;
2151         unsigned long flags;
2152
2153         dbg("%s - port %d", __func__, port->number);
2154
2155         if (edge_port == NULL)
2156                 return 0;
2157         if (edge_port->close_pending == 1)
2158                 return 0;
2159
2160         spin_lock_irqsave(&edge_port->ep_lock, flags);
2161         room = edge_buf_space_avail(edge_port->ep_out_buf);
2162         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2163
2164         dbg("%s - returns %d", __func__, room);
2165         return room;
2166 }
2167
2168 static int edge_chars_in_buffer(struct tty_struct *tty)
2169 {
2170         struct usb_serial_port *port = tty->driver_data;
2171         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2172         int chars = 0;
2173         unsigned long flags;
2174
2175         dbg("%s - port %d", __func__, port->number);
2176
2177         if (edge_port == NULL)
2178                 return 0;
2179         if (edge_port->close_pending == 1)
2180                 return 0;
2181
2182         spin_lock_irqsave(&edge_port->ep_lock, flags);
2183         chars = edge_buf_data_avail(edge_port->ep_out_buf);
2184         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2185
2186         dbg("%s - returns %d", __func__, chars);
2187         return chars;
2188 }
2189
2190 static void edge_throttle(struct tty_struct *tty)
2191 {
2192         struct usb_serial_port *port = tty->driver_data;
2193         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2194         int status;
2195
2196         dbg("%s - port %d", __func__, port->number);
2197
2198         if (edge_port == NULL)
2199                 return;
2200
2201         /* if we are implementing XON/XOFF, send the stop character */
2202         if (I_IXOFF(tty)) {
2203                 unsigned char stop_char = STOP_CHAR(tty);
2204                 status = edge_write(tty, port, &stop_char, 1);
2205                 if (status <= 0) {
2206                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2207                 }
2208         }
2209
2210         /* if we are implementing RTS/CTS, stop reads */
2211         /* and the Edgeport will clear the RTS line */
2212         if (C_CRTSCTS(tty))
2213                 stop_read(edge_port);
2214
2215 }
2216
2217 static void edge_unthrottle(struct tty_struct *tty)
2218 {
2219         struct usb_serial_port *port = tty->driver_data;
2220         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2221         int status;
2222
2223         dbg("%s - port %d", __func__, port->number);
2224
2225         if (edge_port == NULL)
2226                 return;
2227
2228         /* if we are implementing XON/XOFF, send the start character */
2229         if (I_IXOFF(tty)) {
2230                 unsigned char start_char = START_CHAR(tty);
2231                 status = edge_write(tty, port, &start_char, 1);
2232                 if (status <= 0) {
2233                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2234                 }
2235         }
2236         /* if we are implementing RTS/CTS, restart reads */
2237         /* are the Edgeport will assert the RTS line */
2238         if (C_CRTSCTS(tty)) {
2239                 status = restart_read(edge_port);
2240                 if (status)
2241                         dev_err(&port->dev,
2242                                 "%s - read bulk usb_submit_urb failed: %d\n",
2243                                                         __func__, status);
2244         }
2245
2246 }
2247
2248 static void stop_read(struct edgeport_port *edge_port)
2249 {
2250         unsigned long flags;
2251
2252         spin_lock_irqsave(&edge_port->ep_lock, flags);
2253
2254         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2255                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2256         edge_port->shadow_mcr &= ~MCR_RTS;
2257
2258         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2259 }
2260
2261 static int restart_read(struct edgeport_port *edge_port)
2262 {
2263         struct urb *urb;
2264         int status = 0;
2265         unsigned long flags;
2266
2267         spin_lock_irqsave(&edge_port->ep_lock, flags);
2268
2269         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2270                 urb = edge_port->port->read_urb;
2271                 urb->complete = edge_bulk_in_callback;
2272                 urb->context = edge_port;
2273                 urb->dev = edge_port->port->serial->dev;
2274                 status = usb_submit_urb(urb, GFP_ATOMIC);
2275         }
2276         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2277         edge_port->shadow_mcr |= MCR_RTS;
2278
2279         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2280
2281         return status;
2282 }
2283
2284 static void change_port_settings(struct tty_struct *tty,
2285                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2286 {
2287         struct ump_uart_config *config;
2288         int baud;
2289         unsigned cflag;
2290         int status;
2291         int port_number = edge_port->port->number -
2292                                         edge_port->port->serial->minor;
2293
2294         dbg("%s - port %d", __func__, edge_port->port->number);
2295
2296         config = kmalloc (sizeof (*config), GFP_KERNEL);
2297         if (!config) {
2298                 *tty->termios = *old_termios;
2299                 dev_err(&edge_port->port->dev, "%s - out of memory\n",
2300                                                                 __func__);
2301                 return;
2302         }
2303
2304         cflag = tty->termios->c_cflag;
2305
2306         config->wFlags = 0;
2307
2308         /* These flags must be set */
2309         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2310         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2311         config->bUartMode = (__u8)(edge_port->bUartMode);
2312
2313         switch (cflag & CSIZE) {
2314         case CS5:
2315                     config->bDataBits = UMP_UART_CHAR5BITS;
2316                     dbg("%s - data bits = 5", __func__);
2317                     break;
2318         case CS6:
2319                     config->bDataBits = UMP_UART_CHAR6BITS;
2320                     dbg("%s - data bits = 6", __func__);
2321                     break;
2322         case CS7:
2323                     config->bDataBits = UMP_UART_CHAR7BITS;
2324                     dbg("%s - data bits = 7", __func__);
2325                     break;
2326         default:
2327         case CS8:
2328                     config->bDataBits = UMP_UART_CHAR8BITS;
2329                     dbg("%s - data bits = 8", __func__);
2330                             break;
2331         }
2332
2333         if (cflag & PARENB) {
2334                 if (cflag & PARODD) {
2335                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2336                         config->bParity = UMP_UART_ODDPARITY;
2337                         dbg("%s - parity = odd", __func__);
2338                 } else {
2339                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2340                         config->bParity = UMP_UART_EVENPARITY;
2341                         dbg("%s - parity = even", __func__);
2342                 }
2343         } else {
2344                 config->bParity = UMP_UART_NOPARITY;
2345                 dbg("%s - parity = none", __func__);
2346         }
2347
2348         if (cflag & CSTOPB) {
2349                 config->bStopBits = UMP_UART_STOPBIT2;
2350                 dbg("%s - stop bits = 2", __func__);
2351         } else {
2352                 config->bStopBits = UMP_UART_STOPBIT1;
2353                 dbg("%s - stop bits = 1", __func__);
2354         }
2355
2356         /* figure out the flow control settings */
2357         if (cflag & CRTSCTS) {
2358                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2359                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2360                 dbg("%s - RTS/CTS is enabled", __func__);
2361         } else {
2362                 dbg("%s - RTS/CTS is disabled", __func__);
2363                 tty->hw_stopped = 0;
2364                 restart_read(edge_port);
2365         }
2366
2367         /* if we are implementing XON/XOFF, set the start and stop
2368            character in the device */
2369         config->cXon  = START_CHAR(tty);
2370         config->cXoff = STOP_CHAR(tty);
2371
2372         /* if we are implementing INBOUND XON/XOFF */
2373         if (I_IXOFF(tty)) {
2374                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2375                 dbg("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2376                      __func__, config->cXon, config->cXoff);
2377         } else
2378                 dbg("%s - INBOUND XON/XOFF is disabled", __func__);
2379
2380         /* if we are implementing OUTBOUND XON/XOFF */
2381         if (I_IXON(tty)) {
2382                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2383                 dbg("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2384                      __func__, config->cXon, config->cXoff);
2385         } else
2386                 dbg("%s - OUTBOUND XON/XOFF is disabled", __func__);
2387
2388         tty->termios->c_cflag &= ~CMSPAR;
2389
2390         /* Round the baud rate */
2391         baud = tty_get_baud_rate(tty);
2392         if (!baud) {
2393                 /* pick a default, any default... */
2394                 baud = 9600;
2395         } else
2396                 tty_encode_baud_rate(tty, baud, baud);
2397
2398         edge_port->baud_rate = baud;
2399         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2400
2401         /* FIXME: Recompute actual baud from divisor here */
2402
2403         dbg("%s - baud rate = %d, wBaudRate = %d", __func__, baud,
2404                                                         config->wBaudRate);
2405
2406         dbg("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
2407         dbg("wFlags:    0x%x", config->wFlags);
2408         dbg("bDataBits:   %d", config->bDataBits);
2409         dbg("bParity:     %d", config->bParity);
2410         dbg("bStopBits:   %d", config->bStopBits);
2411         dbg("cXon:        %d", config->cXon);
2412         dbg("cXoff:       %d", config->cXoff);
2413         dbg("bUartMode:   %d", config->bUartMode);
2414
2415         /* move the word values into big endian mode */
2416         cpu_to_be16s(&config->wFlags);
2417         cpu_to_be16s(&config->wBaudRate);
2418
2419         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2420                                 (__u8)(UMPM_UART1_PORT + port_number),
2421                                 0, (__u8 *)config, sizeof(*config));
2422         if (status)
2423                 dbg("%s - error %d when trying to write config to device",
2424                      __func__, status);
2425         kfree(config);
2426         return;
2427 }
2428
2429 static void edge_set_termios(struct tty_struct *tty,
2430                 struct usb_serial_port *port, struct ktermios *old_termios)
2431 {
2432         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2433         unsigned int cflag;
2434
2435         cflag = tty->termios->c_cflag;
2436
2437         dbg("%s - clfag %08x iflag %08x", __func__,
2438             tty->termios->c_cflag, tty->termios->c_iflag);
2439         dbg("%s - old clfag %08x old iflag %08x", __func__,
2440             old_termios->c_cflag, old_termios->c_iflag);
2441         dbg("%s - port %d", __func__, port->number);
2442
2443         if (edge_port == NULL)
2444                 return;
2445         /* change the port settings to the new ones specified */
2446         change_port_settings(tty, edge_port, old_termios);
2447         return;
2448 }
2449
2450 static int edge_tiocmset(struct tty_struct *tty, struct file *file,
2451                                         unsigned int set, unsigned int clear)
2452 {
2453         struct usb_serial_port *port = tty->driver_data;
2454         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2455         unsigned int mcr;
2456         unsigned long flags;
2457
2458         dbg("%s - port %d", __func__, port->number);
2459
2460         spin_lock_irqsave(&edge_port->ep_lock, flags);
2461         mcr = edge_port->shadow_mcr;
2462         if (set & TIOCM_RTS)
2463                 mcr |= MCR_RTS;
2464         if (set & TIOCM_DTR)
2465                 mcr |= MCR_DTR;
2466         if (set & TIOCM_LOOP)
2467                 mcr |= MCR_LOOPBACK;
2468
2469         if (clear & TIOCM_RTS)
2470                 mcr &= ~MCR_RTS;
2471         if (clear & TIOCM_DTR)
2472                 mcr &= ~MCR_DTR;
2473         if (clear & TIOCM_LOOP)
2474                 mcr &= ~MCR_LOOPBACK;
2475
2476         edge_port->shadow_mcr = mcr;
2477         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2478
2479         restore_mcr(edge_port, mcr);
2480         return 0;
2481 }
2482
2483 static int edge_tiocmget(struct tty_struct *tty, struct file *file)
2484 {
2485         struct usb_serial_port *port = tty->driver_data;
2486         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2487         unsigned int result = 0;
2488         unsigned int msr;
2489         unsigned int mcr;
2490         unsigned long flags;
2491
2492         dbg("%s - port %d", __func__, port->number);
2493
2494         spin_lock_irqsave(&edge_port->ep_lock, flags);
2495
2496         msr = edge_port->shadow_msr;
2497         mcr = edge_port->shadow_mcr;
2498         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2499                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2500                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2501                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2502                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2503                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2504
2505
2506         dbg("%s -- %x", __func__, result);
2507         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2508
2509         return result;
2510 }
2511
2512 static int get_serial_info(struct edgeport_port *edge_port,
2513                                 struct serial_struct __user *retinfo)
2514 {
2515         struct serial_struct tmp;
2516
2517         if (!retinfo)
2518                 return -EFAULT;
2519
2520         memset(&tmp, 0, sizeof(tmp));
2521
2522         tmp.type                = PORT_16550A;
2523         tmp.line                = edge_port->port->serial->minor;
2524         tmp.port                = edge_port->port->number;
2525         tmp.irq                 = 0;
2526         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2527         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2528         tmp.baud_base           = 9600;
2529         tmp.close_delay         = 5*HZ;
2530         tmp.closing_wait        = closing_wait;
2531
2532         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2533                 return -EFAULT;
2534         return 0;
2535 }
2536
2537 static int edge_ioctl(struct tty_struct *tty, struct file *file,
2538                                         unsigned int cmd, unsigned long arg)
2539 {
2540         struct usb_serial_port *port = tty->driver_data;
2541         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2542         struct async_icount cnow;
2543         struct async_icount cprev;
2544
2545         dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2546
2547         switch (cmd) {
2548         case TIOCGSERIAL:
2549                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
2550                 return get_serial_info(edge_port,
2551                                 (struct serial_struct __user *) arg);
2552         case TIOCMIWAIT:
2553                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
2554                 cprev = edge_port->icount;
2555                 while (1) {
2556                         interruptible_sleep_on(&edge_port->delta_msr_wait);
2557                         /* see if a signal did it */
2558                         if (signal_pending(current))
2559                                 return -ERESTARTSYS;
2560                         cnow = edge_port->icount;
2561                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2562                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2563                                 return -EIO; /* no change => error */
2564                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2565                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2566                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2567                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2568                                 return 0;
2569                         }
2570                         cprev = cnow;
2571                 }
2572                 /* not reached */
2573                 break;
2574         case TIOCGICOUNT:
2575                 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2576                      port->number, edge_port->icount.rx, edge_port->icount.tx);
2577                 if (copy_to_user((void __user *)arg, &edge_port->icount,
2578                                 sizeof(edge_port->icount)))
2579                         return -EFAULT;
2580                 return 0;
2581         }
2582         return -ENOIOCTLCMD;
2583 }
2584
2585 static void edge_break(struct tty_struct *tty, int break_state)
2586 {
2587         struct usb_serial_port *port = tty->driver_data;
2588         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2589         int status;
2590         int bv = 0;     /* Off */
2591
2592         dbg("%s - state = %d", __func__, break_state);
2593
2594         /* chase the port close */
2595         chase_port(edge_port, 0, 0);
2596
2597         if (break_state == -1)
2598                 bv = 1; /* On */
2599         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2600         if (status)
2601                 dbg("%s - error %d sending break set/clear command.",
2602                      __func__, status);
2603 }
2604
2605 static int edge_startup(struct usb_serial *serial)
2606 {
2607         struct edgeport_serial *edge_serial;
2608         struct edgeport_port *edge_port;
2609         struct usb_device *dev;
2610         int status;
2611         int i;
2612
2613         dev = serial->dev;
2614
2615         /* create our private serial structure */
2616         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2617         if (edge_serial == NULL) {
2618                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __func__);
2619                 return -ENOMEM;
2620         }
2621         mutex_init(&edge_serial->es_lock);
2622         edge_serial->serial = serial;
2623         usb_set_serial_data(serial, edge_serial);
2624
2625         status = download_fw(edge_serial);
2626         if (status) {
2627                 kfree(edge_serial);
2628                 return status;
2629         }
2630
2631         /* set up our port private structures */
2632         for (i = 0; i < serial->num_ports; ++i) {
2633                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2634                 if (edge_port == NULL) {
2635                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2636                                                                 __func__);
2637                         goto cleanup;
2638                 }
2639                 spin_lock_init(&edge_port->ep_lock);
2640                 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
2641                 if (edge_port->ep_out_buf == NULL) {
2642                         dev_err(&serial->dev->dev, "%s - Out of memory\n",
2643                                                                 __func__);
2644                         kfree(edge_port);
2645                         goto cleanup;
2646                 }
2647                 edge_port->port = serial->port[i];
2648                 edge_port->edge_serial = edge_serial;
2649                 usb_set_serial_port_data(serial->port[i], edge_port);
2650                 edge_port->bUartMode = default_uart_mode;
2651         }
2652
2653         return 0;
2654
2655 cleanup:
2656         for (--i; i >= 0; --i) {
2657                 edge_port = usb_get_serial_port_data(serial->port[i]);
2658                 edge_buf_free(edge_port->ep_out_buf);
2659                 kfree(edge_port);
2660                 usb_set_serial_port_data(serial->port[i], NULL);
2661         }
2662         kfree(edge_serial);
2663         usb_set_serial_data(serial, NULL);
2664         return -ENOMEM;
2665 }
2666
2667 static void edge_shutdown(struct usb_serial *serial)
2668 {
2669         int i;
2670         struct edgeport_port *edge_port;
2671
2672         dbg("%s", __func__);
2673
2674         for (i = 0; i < serial->num_ports; ++i) {
2675                 edge_port = usb_get_serial_port_data(serial->port[i]);
2676                 edge_remove_sysfs_attrs(edge_port->port);
2677                 edge_buf_free(edge_port->ep_out_buf);
2678                 kfree(edge_port);
2679                 usb_set_serial_port_data(serial->port[i], NULL);
2680         }
2681         kfree(usb_get_serial_data(serial));
2682         usb_set_serial_data(serial, NULL);
2683 }
2684
2685
2686 /* Sysfs Attributes */
2687
2688 static ssize_t show_uart_mode(struct device *dev,
2689         struct device_attribute *attr, char *buf)
2690 {
2691         struct usb_serial_port *port = to_usb_serial_port(dev);
2692         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2693
2694         return sprintf(buf, "%d\n", edge_port->bUartMode);
2695 }
2696
2697 static ssize_t store_uart_mode(struct device *dev,
2698         struct device_attribute *attr, const char *valbuf, size_t count)
2699 {
2700         struct usb_serial_port *port = to_usb_serial_port(dev);
2701         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2702         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2703
2704         dbg("%s: setting uart_mode = %d", __func__, v);
2705
2706         if (v < 256)
2707                 edge_port->bUartMode = v;
2708         else
2709                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2710
2711         return count;
2712 }
2713
2714 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode,
2715                                                         store_uart_mode);
2716
2717 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2718 {
2719         return device_create_file(&port->dev, &dev_attr_uart_mode);
2720 }
2721
2722 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2723 {
2724         device_remove_file(&port->dev, &dev_attr_uart_mode);
2725         return 0;
2726 }
2727
2728
2729 /* Circular Buffer */
2730
2731 /*
2732  * edge_buf_alloc
2733  *
2734  * Allocate a circular buffer and all associated memory.
2735  */
2736
2737 static struct edge_buf *edge_buf_alloc(unsigned int size)
2738 {
2739         struct edge_buf *eb;
2740
2741
2742         if (size == 0)
2743                 return NULL;
2744
2745         eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
2746         if (eb == NULL)
2747                 return NULL;
2748
2749         eb->buf_buf = kmalloc(size, GFP_KERNEL);
2750         if (eb->buf_buf == NULL) {
2751                 kfree(eb);
2752                 return NULL;
2753         }
2754
2755         eb->buf_size = size;
2756         eb->buf_get = eb->buf_put = eb->buf_buf;
2757
2758         return eb;
2759 }
2760
2761
2762 /*
2763  * edge_buf_free
2764  *
2765  * Free the buffer and all associated memory.
2766  */
2767
2768 static void edge_buf_free(struct edge_buf *eb)
2769 {
2770         if (eb) {
2771                 kfree(eb->buf_buf);
2772                 kfree(eb);
2773         }
2774 }
2775
2776
2777 /*
2778  * edge_buf_clear
2779  *
2780  * Clear out all data in the circular buffer.
2781  */
2782
2783 static void edge_buf_clear(struct edge_buf *eb)
2784 {
2785         if (eb != NULL)
2786                 eb->buf_get = eb->buf_put;
2787         /* equivalent to a get of all data available */
2788 }
2789
2790
2791 /*
2792  * edge_buf_data_avail
2793  *
2794  * Return the number of bytes of data available in the circular
2795  * buffer.
2796  */
2797
2798 static unsigned int edge_buf_data_avail(struct edge_buf *eb)
2799 {
2800         if (eb == NULL)
2801                 return 0;
2802         return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
2803 }
2804
2805
2806 /*
2807  * edge_buf_space_avail
2808  *
2809  * Return the number of bytes of space available in the circular
2810  * buffer.
2811  */
2812
2813 static unsigned int edge_buf_space_avail(struct edge_buf *eb)
2814 {
2815         if (eb == NULL)
2816                 return 0;
2817         return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
2818 }
2819
2820
2821 /*
2822  * edge_buf_put
2823  *
2824  * Copy data data from a user buffer and put it into the circular buffer.
2825  * Restrict to the amount of space available.
2826  *
2827  * Return the number of bytes copied.
2828  */
2829
2830 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
2831         unsigned int count)
2832 {
2833         unsigned int len;
2834
2835
2836         if (eb == NULL)
2837                 return 0;
2838
2839         len  = edge_buf_space_avail(eb);
2840         if (count > len)
2841                 count = len;
2842
2843         if (count == 0)
2844                 return 0;
2845
2846         len = eb->buf_buf + eb->buf_size - eb->buf_put;
2847         if (count > len) {
2848                 memcpy(eb->buf_put, buf, len);
2849                 memcpy(eb->buf_buf, buf+len, count - len);
2850                 eb->buf_put = eb->buf_buf + count - len;
2851         } else {
2852                 memcpy(eb->buf_put, buf, count);
2853                 if (count < len)
2854                         eb->buf_put += count;
2855                 else /* count == len */
2856                         eb->buf_put = eb->buf_buf;
2857         }
2858
2859         return count;
2860 }
2861
2862
2863 /*
2864  * edge_buf_get
2865  *
2866  * Get data from the circular buffer and copy to the given buffer.
2867  * Restrict to the amount of data available.
2868  *
2869  * Return the number of bytes copied.
2870  */
2871
2872 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
2873         unsigned int count)
2874 {
2875         unsigned int len;
2876
2877
2878         if (eb == NULL)
2879                 return 0;
2880
2881         len = edge_buf_data_avail(eb);
2882         if (count > len)
2883                 count = len;
2884
2885         if (count == 0)
2886                 return 0;
2887
2888         len = eb->buf_buf + eb->buf_size - eb->buf_get;
2889         if (count > len) {
2890                 memcpy(buf, eb->buf_get, len);
2891                 memcpy(buf+len, eb->buf_buf, count - len);
2892                 eb->buf_get = eb->buf_buf + count - len;
2893         } else {
2894                 memcpy(buf, eb->buf_get, count);
2895                 if (count < len)
2896                         eb->buf_get += count;
2897                 else /* count == len */
2898                         eb->buf_get = eb->buf_buf;
2899         }
2900
2901         return count;
2902 }
2903
2904
2905 static struct usb_serial_driver edgeport_1port_device = {
2906         .driver = {
2907                 .owner          = THIS_MODULE,
2908                 .name           = "edgeport_ti_1",
2909         },
2910         .description            = "Edgeport TI 1 port adapter",
2911         .usb_driver             = &io_driver,
2912         .id_table               = edgeport_1port_id_table,
2913         .num_ports              = 1,
2914         .open                   = edge_open,
2915         .close                  = edge_close,
2916         .throttle               = edge_throttle,
2917         .unthrottle             = edge_unthrottle,
2918         .attach                 = edge_startup,
2919         .shutdown               = edge_shutdown,
2920         .port_probe             = edge_create_sysfs_attrs,
2921         .ioctl                  = edge_ioctl,
2922         .set_termios            = edge_set_termios,
2923         .tiocmget               = edge_tiocmget,
2924         .tiocmset               = edge_tiocmset,
2925         .write                  = edge_write,
2926         .write_room             = edge_write_room,
2927         .chars_in_buffer        = edge_chars_in_buffer,
2928         .break_ctl              = edge_break,
2929         .read_int_callback      = edge_interrupt_callback,
2930         .read_bulk_callback     = edge_bulk_in_callback,
2931         .write_bulk_callback    = edge_bulk_out_callback,
2932 };
2933
2934 static struct usb_serial_driver edgeport_2port_device = {
2935         .driver = {
2936                 .owner          = THIS_MODULE,
2937                 .name           = "edgeport_ti_2",
2938         },
2939         .description            = "Edgeport TI 2 port adapter",
2940         .usb_driver             = &io_driver,
2941         .id_table               = edgeport_2port_id_table,
2942         .num_ports              = 2,
2943         .open                   = edge_open,
2944         .close                  = edge_close,
2945         .throttle               = edge_throttle,
2946         .unthrottle             = edge_unthrottle,
2947         .attach                 = edge_startup,
2948         .shutdown               = edge_shutdown,
2949         .port_probe             = edge_create_sysfs_attrs,
2950         .ioctl                  = edge_ioctl,
2951         .set_termios            = edge_set_termios,
2952         .tiocmget               = edge_tiocmget,
2953         .tiocmset               = edge_tiocmset,
2954         .write                  = edge_write,
2955         .write_room             = edge_write_room,
2956         .chars_in_buffer        = edge_chars_in_buffer,
2957         .break_ctl              = edge_break,
2958         .read_int_callback      = edge_interrupt_callback,
2959         .read_bulk_callback     = edge_bulk_in_callback,
2960         .write_bulk_callback    = edge_bulk_out_callback,
2961 };
2962
2963
2964 static int __init edgeport_init(void)
2965 {
2966         int retval;
2967         retval = usb_serial_register(&edgeport_1port_device);
2968         if (retval)
2969                 goto failed_1port_device_register;
2970         retval = usb_serial_register(&edgeport_2port_device);
2971         if (retval)
2972                 goto failed_2port_device_register;
2973         retval = usb_register(&io_driver);
2974         if (retval)
2975                 goto failed_usb_register;
2976         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2977                DRIVER_DESC "\n");
2978         return 0;
2979 failed_usb_register:
2980         usb_serial_deregister(&edgeport_2port_device);
2981 failed_2port_device_register:
2982         usb_serial_deregister(&edgeport_1port_device);
2983 failed_1port_device_register:
2984         return retval;
2985 }
2986
2987 static void __exit edgeport_exit(void)
2988 {
2989         usb_deregister(&io_driver);
2990         usb_serial_deregister(&edgeport_1port_device);
2991         usb_serial_deregister(&edgeport_2port_device);
2992 }
2993
2994 module_init(edgeport_init);
2995 module_exit(edgeport_exit);
2996
2997 /* Module information */
2998 MODULE_AUTHOR(DRIVER_AUTHOR);
2999 MODULE_DESCRIPTION(DRIVER_DESC);
3000 MODULE_LICENSE("GPL");
3001 MODULE_FIRMWARE("edgeport/down3.bin");
3002
3003 module_param(debug, bool, S_IRUGO | S_IWUSR);
3004 MODULE_PARM_DESC(debug, "Debug enabled or not");
3005
3006 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
3007 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
3008
3009 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
3010 MODULE_PARM_DESC(ignore_cpu_rev,
3011                         "Ignore the cpu revision when connecting to a device");
3012
3013 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
3014 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");