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