drivers/usb/serial/io_ti.c

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