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/slab.h>
  24 #include <linux/tty.h>
  25 #include <linux/tty_driver.h>
  26 #include <linux/tty_flip.h>
  27 #include <linux/module.h>
  28 #include <linux/spinlock.h>
  29 #include <linux/mutex.h>
  30 #include <linux/serial.h>
  31 #include <linux/swab.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   /*
  58                                      * Currently in boot mode but
  59                                      * transitioning to download mode
  60                                      */
  61
  62 /* read urb state */
  63 #define EDGE_READ_URB_RUNNING   0
  64 #define EDGE_READ_URB_STOPPING  1
  65 #define EDGE_READ_URB_STOPPED   2
  66
  67 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
  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 /*
  77  * Edgeport firmware header
  78  *
  79  * "build_number" has been set to 0 in all three of the images I have
  80  * seen, and Digi Tech Support suggests that it is safe to ignore it.
  81  *
  82  * "length" is the number of bytes of actual data following the header.
  83  *
  84  * "checksum" is the low order byte resulting from adding the values of
  85  * all the data bytes.
  86  */
  87 struct edgeport_fw_hdr {
  88         u8 major_version;
  89         u8 minor_version;
  90         __le16 build_number;
  91         __le16 length;
  92         u8 checksum;
  93 } __packed;
  94
  95 struct edgeport_port {
  96         __u16 uart_base;
  97         __u16 dma_address;
  98         __u8 shadow_msr;
  99         __u8 shadow_mcr;
 100         __u8 shadow_lsr;
 101         __u8 lsr_mask;
 102         __u32 ump_read_timeout;         /*
 103                                          * Number of milliseconds the UMP will
 104                                          * wait without data before completing
 105                                          * a read short
 106                                          */
 107         int baud_rate;
 108         int close_pending;
 109         int lsr_event;
 110
 111         struct edgeport_serial  *edge_serial;
 112         struct usb_serial_port  *port;
 113         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
 114         spinlock_t ep_lock;
 115         int ep_read_urb_state;
 116         int ep_write_urb_in_use;
 117 };
 118
 119 struct edgeport_serial {
 120         struct product_info product_info;
 121         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
 122         u8 TiReadI2C;                   /*
 123                                          * Set to TRUE if we have read the
 124                                          * I2c in Boot Mode
 125                                          */
 126         struct mutex es_lock;
 127         int num_ports_open;
 128         struct usb_serial *serial;
 129         struct delayed_work heartbeat_work;
 130         int fw_version;
 131         bool use_heartbeat;
 132 };
 133
 134
 135 /* Devices that this driver supports */
 136 static const struct usb_device_id edgeport_1port_id_table[] = {
 137         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 153         { }
 154 };
 155
 156 static const struct usb_device_id edgeport_2port_id_table[] = {
 157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 163         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 169         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) },
 176         { }
 177 };
 178
 179 /* Devices that this driver supports */
 180 static const struct usb_device_id id_table_combined[] = {
 181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 209         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 210         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 211         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 212         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 213         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 214         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) },
 215         { }
 216 };
 217
 218 MODULE_DEVICE_TABLE(usb, id_table_combined);
 219
 220 static int closing_wait = EDGE_CLOSING_WAIT;
 221 static bool ignore_cpu_rev;
 222 static int default_uart_mode;           /* RS232 */
 223
 224 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 225                 int length);
 226
 227 static void stop_read(struct edgeport_port *edge_port);
 228 static int restart_read(struct edgeport_port *edge_port);
 229
 230 static void edge_set_termios(struct tty_struct *tty,
 231                 struct usb_serial_port *port, struct ktermios *old_termios);
 232 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
 233
 234 static int do_download_mode(struct edgeport_serial *serial,
 235                 const struct firmware *fw);
 236 static int do_boot_mode(struct edgeport_serial *serial,
 237                 const struct firmware *fw);
 238
 239 /* sysfs attributes */
 240 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 241 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 242
 243 /*
 244  * Some release of Edgeport firmware "(DEBLOBBED)" after version 4.80
 245  * introduced code to automatically disconnect idle devices on some
 246  * Edgeport models after periods of inactivity, typically ~60 seconds.
 247  * This occurs without regard to whether ports on the device are open
 248  * or not.  Digi International Tech Support suggested:
 249  *
 250  * 1.  Adding driver "heartbeat" code to reset the firmware timer by
 251  *     requesting a descriptor record every 15 seconds, which should be
 252  *     effective with newer firmware versions that require it, and benign
 253  *     with older versions that do not. In practice 40 seconds seems often
 254  *     enough.
 255  * 2.  The heartbeat code is currently required only on Edgeport/416 models.
 256  */
 257 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
 258 #define FW_HEARTBEAT_SECS 40
 259
 260 /* Timeouts in msecs: firmware downloads take longer */
 261 #define TI_VSEND_TIMEOUT_DEFAULT 1000
 262 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
 263
 264 static int ti_vread_sync(struct usb_device *dev, __u8 request,
 265                                 __u16 value, __u16 index, u8 *data, int size)
 266 {
 267         int status;
 268
 269         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 270                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
 271                         value, index, data, size, 1000);
 272         if (status < 0)
 273                 return status;
 274         if (status != size) {
 275                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
 276                         __func__, size, status);
 277                 return -ECOMM;
 278         }
 279         return 0;
 280 }
 281
 282 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
 283                 u16 index, u8 *data, int size, int timeout)
 284 {
 285         int status;
 286
 287         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 288                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 289                         value, index, data, size, timeout);
 290         if (status < 0)
 291                 return status;
 292         if (status != size) {
 293                 dev_dbg(&dev->dev, "%s - wanted to write %d, but only wrote %d\n",
 294                         __func__, size, status);
 295                 return -ECOMM;
 296         }
 297         return 0;
 298 }
 299
 300 static int send_cmd(struct usb_device *dev, __u8 command,
 301                                 __u8 moduleid, __u16 value, u8 *data,
 302                                 int size)
 303 {
 304         return ti_vsend_sync(dev, command, value, moduleid, data, size,
 305                         TI_VSEND_TIMEOUT_DEFAULT);
 306 }
 307
 308 /* clear tx/rx buffers and fifo in TI UMP */
 309 static int purge_port(struct usb_serial_port *port, __u16 mask)
 310 {
 311         int port_number = port->port_number;
 312
 313         dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
 314
 315         return send_cmd(port->serial->dev,
 316                                         UMPC_PURGE_PORT,
 317                                         (__u8)(UMPM_UART1_PORT + port_number),
 318                                         mask,
 319                                         NULL,
 320                                         0);
 321 }
 322
 323 /**
 324  * read_download_mem - Read edgeport memory from TI chip
 325  * @dev: usb device pointer
 326  * @start_address: Device CPU address at which to read
 327  * @length: Length of above data
 328  * @address_type: Can read both XDATA and I2C
 329  * @buffer: pointer to input data buffer
 330  */
 331 static int read_download_mem(struct usb_device *dev, int start_address,
 332                                 int length, __u8 address_type, __u8 *buffer)
 333 {
 334         int status = 0;
 335         __u8 read_length;
 336         u16 be_start_address;
 337
 338         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
 339
 340         /*
 341          * Read in blocks of 64 bytes
 342          * (TI firmware can't handle more than 64 byte reads)
 343          */
 344         while (length) {
 345                 if (length > 64)
 346                         read_length = 64;
 347                 else
 348                         read_length = (__u8)length;
 349
 350                 if (read_length > 1) {
 351                         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
 352                 }
 353                 /*
 354                  * NOTE: Must use swab as wIndex is sent in little-endian
 355                  *       byte order regardless of host byte order.
 356                  */
 357                 be_start_address = swab16((u16)start_address);
 358                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
 359                                         (__u16)address_type,
 360                                         be_start_address,
 361                                         buffer, read_length);
 362
 363                 if (status) {
 364                         dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
 365                         return status;
 366                 }
 367
 368                 if (read_length > 1)
 369                         usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
 370
 371                 /* Update pointers/length */
 372                 start_address += read_length;
 373                 buffer += read_length;
 374                 length -= read_length;
 375         }
 376
 377         return status;
 378 }
 379
 380 static int read_ram(struct usb_device *dev, int start_address,
 381                                                 int length, __u8 *buffer)
 382 {
 383         return read_download_mem(dev, start_address, length,
 384                                         DTK_ADDR_SPACE_XDATA, buffer);
 385 }
 386
 387 /* Read edgeport memory to a given block */
 388 static int read_boot_mem(struct edgeport_serial *serial,
 389                                 int start_address, int length, __u8 *buffer)
 390 {
 391         int status = 0;
 392         int i;
 393
 394         for (i = 0; i < length; i++) {
 395                 status = ti_vread_sync(serial->serial->dev,
 396                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
 397                                 (__u16)(start_address+i), &buffer[i], 0x01);
 398                 if (status) {
 399                         dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
 400                         return status;
 401                 }
 402         }
 403
 404         dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
 405                 __func__, start_address, length);
 406         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 407
 408         serial->TiReadI2C = 1;
 409
 410         return status;
 411 }
 412
 413 /* Write given block to TI EPROM memory */
 414 static int write_boot_mem(struct edgeport_serial *serial,
 415                                 int start_address, int length, __u8 *buffer)
 416 {
 417         int status = 0;
 418         int i;
 419         u8 *temp;
 420
 421         /* Must do a read before write */
 422         if (!serial->TiReadI2C) {
 423                 temp = kmalloc(1, GFP_KERNEL);
 424                 if (!temp)
 425                         return -ENOMEM;
 426
 427                 status = read_boot_mem(serial, 0, 1, temp);
 428                 kfree(temp);
 429                 if (status)
 430                         return status;
 431         }
 432
 433         for (i = 0; i < length; ++i) {
 434                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 435                                 buffer[i], (u16)(i + start_address), NULL,
 436                                 0, TI_VSEND_TIMEOUT_DEFAULT);
 437                 if (status)
 438                         return status;
 439         }
 440
 441         dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
 442         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 443
 444         return status;
 445 }
 446
 447 /* Write edgeport I2C memory to TI chip */
 448 static int write_i2c_mem(struct edgeport_serial *serial,
 449                 int start_address, int length, __u8 address_type, __u8 *buffer)
 450 {
 451         struct device *dev = &serial->serial->dev->dev;
 452         int status = 0;
 453         int write_length;
 454         u16 be_start_address;
 455
 456         /* We can only send a maximum of 1 aligned byte page at a time */
 457
 458         /* calculate the number of bytes left in the first page */
 459         write_length = EPROM_PAGE_SIZE -
 460                                 (start_address & (EPROM_PAGE_SIZE - 1));
 461
 462         if (write_length > length)
 463                 write_length = length;
 464
 465         dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
 466                 __func__, start_address, write_length);
 467         usb_serial_debug_data(dev, __func__, write_length, buffer);
 468
 469         /*
 470          * Write first page.
 471          *
 472          * NOTE: Must use swab as wIndex is sent in little-endian byte order
 473          *       regardless of host byte order.
 474          */
 475         be_start_address = swab16((u16)start_address);
 476         status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 477                                 (u16)address_type, be_start_address,
 478                                 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
 479         if (status) {
 480                 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
 481                 return status;
 482         }
 483
 484         length          -= write_length;
 485         start_address   += write_length;
 486         buffer          += write_length;
 487
 488         /*
 489          * We should be aligned now -- can write max page size bytes at a
 490          * time.
 491          */
 492         while (length) {
 493                 if (length > EPROM_PAGE_SIZE)
 494                         write_length = EPROM_PAGE_SIZE;
 495                 else
 496                         write_length = length;
 497
 498                 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
 499                         __func__, start_address, write_length);
 500                 usb_serial_debug_data(dev, __func__, write_length, buffer);
 501
 502                 /*
 503                  * Write next page.
 504                  *
 505                  * NOTE: Must use swab as wIndex is sent in little-endian byte
 506                  *       order regardless of host byte order.
 507                  */
 508                 be_start_address = swab16((u16)start_address);
 509                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 510                                 (u16)address_type, be_start_address, buffer,
 511                                 write_length, TI_VSEND_TIMEOUT_DEFAULT);
 512                 if (status) {
 513                         dev_err(dev, "%s - ERROR %d\n", __func__, status);
 514                         return status;
 515                 }
 516
 517                 length          -= write_length;
 518                 start_address   += write_length;
 519                 buffer          += write_length;
 520         }
 521         return status;
 522 }
 523
 524 /*
 525  * Examine the UMP DMA registers and LSR
 526  *
 527  * Check the MSBit of the X and Y DMA byte count registers.
 528  * A zero in this bit indicates that the TX DMA buffers are empty
 529  * then check the TX Empty bit in the UART.
 530  */
 531 static int tx_active(struct edgeport_port *port)
 532 {
 533         int status;
 534         struct out_endpoint_desc_block *oedb;
 535         __u8 *lsr;
 536         int bytes_left = 0;
 537
 538         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
 539         if (!oedb)
 540                 return -ENOMEM;
 541
 542         /*
 543          * Sigh, that's right, just one byte, as not all platforms can
 544          * do DMA from stack
 545          */
 546         lsr = kmalloc(1, GFP_KERNEL);
 547         if (!lsr) {
 548                 kfree(oedb);
 549                 return -ENOMEM;
 550         }
 551         /* Read the DMA Count Registers */
 552         status = read_ram(port->port->serial->dev, port->dma_address,
 553                                                 sizeof(*oedb), (void *)oedb);
 554         if (status)
 555                 goto exit_is_tx_active;
 556
 557         dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
 558
 559         /* and the LSR */
 560         status = read_ram(port->port->serial->dev,
 561                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
 562
 563         if (status)
 564                 goto exit_is_tx_active;
 565         dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
 566
 567         /* If either buffer has data or we are transmitting then return TRUE */
 568         if ((oedb->XByteCount & 0x80) != 0)
 569                 bytes_left += 64;
 570
 571         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
 572                 bytes_left += 1;
 573
 574         /* We return Not Active if we get any kind of error */
 575 exit_is_tx_active:
 576         dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
 577
 578         kfree(lsr);
 579         kfree(oedb);
 580         return bytes_left;
 581 }
 582
 583 static int choose_config(struct usb_device *dev)
 584 {
 585         /*
 586          * There may be multiple configurations on this device, in which case
 587          * we would need to read and parse all of them to find out which one
 588          * we want. However, we just support one config at this point,
 589          * configuration # 1, which is Config Descriptor 0.
 590          */
 591
 592         dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
 593                 __func__, dev->config->desc.bNumInterfaces);
 594         dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
 595                 __func__, dev->config->desc.bMaxPower * 2);
 596
 597         if (dev->config->desc.bNumInterfaces != 1) {
 598                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
 599                 return -ENODEV;
 600         }
 601
 602         return 0;
 603 }
 604
 605 static int read_rom(struct edgeport_serial *serial,
 606                                 int start_address, int length, __u8 *buffer)
 607 {
 608         int status;
 609
 610         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 611                 status = read_download_mem(serial->serial->dev,
 612                                                start_address,
 613                                                length,
 614                                                serial->TI_I2C_Type,
 615                                                buffer);
 616         } else {
 617                 status = read_boot_mem(serial, start_address, length,
 618                                                                 buffer);
 619         }
 620         return status;
 621 }
 622
 623 static int write_rom(struct edgeport_serial *serial, int start_address,
 624                                                 int length, __u8 *buffer)
 625 {
 626         if (serial->product_info.TiMode == TI_MODE_BOOT)
 627                 return write_boot_mem(serial, start_address, length,
 628                                                                 buffer);
 629
 630         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 631                 return write_i2c_mem(serial, start_address, length,
 632                                                 serial->TI_I2C_Type, buffer);
 633         return -EINVAL;
 634 }
 635
 636 /* Read a descriptor header from I2C based on type */
 637 static int get_descriptor_addr(struct edgeport_serial *serial,
 638                                 int desc_type, struct ti_i2c_desc *rom_desc)
 639 {
 640         int start_address;
 641         int status;
 642
 643         /* Search for requested descriptor in I2C */
 644         start_address = 2;
 645         do {
 646                 status = read_rom(serial,
 647                                    start_address,
 648                                    sizeof(struct ti_i2c_desc),
 649                                    (__u8 *)rom_desc);
 650                 if (status)
 651                         return 0;
 652
 653                 if (rom_desc->Type == desc_type)
 654                         return start_address;
 655
 656                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 657                                                 le16_to_cpu(rom_desc->Size);
 658
 659         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 660
 661         return 0;
 662 }
 663
 664 /* Validate descriptor checksum */
 665 static int valid_csum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 666 {
 667         __u16 i;
 668         __u8 cs = 0;
 669
 670         for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
 671                 cs = (__u8)(cs + buffer[i]);
 672
 673         if (cs != rom_desc->CheckSum) {
 674                 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 675                 return -EINVAL;
 676         }
 677         return 0;
 678 }
 679
 680 /* Make sure that the I2C image is good */
 681 static int check_i2c_image(struct edgeport_serial *serial)
 682 {
 683         struct device *dev = &serial->serial->dev->dev;
 684         int status = 0;
 685         struct ti_i2c_desc *rom_desc;
 686         int start_address = 2;
 687         __u8 *buffer;
 688         __u16 ttype;
 689
 690         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 691         if (!rom_desc)
 692                 return -ENOMEM;
 693
 694         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 695         if (!buffer) {
 696                 kfree(rom_desc);
 697                 return -ENOMEM;
 698         }
 699
 700         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 701         status = read_rom(serial, 0, 1, buffer);
 702         if (status)
 703                 goto out;
 704
 705         if (*buffer != UMP5152 && *buffer != UMP3410) {
 706                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 707                 status = -ENODEV;
 708                 goto out;
 709         }
 710
 711         do {
 712                 /* Validate the I2C */
 713                 status = read_rom(serial,
 714                                 start_address,
 715                                 sizeof(struct ti_i2c_desc),
 716                                 (__u8 *)rom_desc);
 717                 if (status)
 718                         break;
 719
 720                 if ((start_address + sizeof(struct ti_i2c_desc) +
 721                         le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
 722                         status = -ENODEV;
 723                         dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
 724                         break;
 725                 }
 726
 727                 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
 728
 729                 /* Skip type 2 record */
 730                 ttype = rom_desc->Type & 0x0f;
 731                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 732                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 733                         /* Read the descriptor data */
 734                         status = read_rom(serial, start_address +
 735                                                 sizeof(struct ti_i2c_desc),
 736                                                 le16_to_cpu(rom_desc->Size),
 737                                                 buffer);
 738                         if (status)
 739                                 break;
 740
 741                         status = valid_csum(rom_desc, buffer);
 742                         if (status)
 743                                 break;
 744                 }
 745                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 746                                                 le16_to_cpu(rom_desc->Size);
 747
 748         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 749                                 (start_address < TI_MAX_I2C_SIZE));
 750
 751         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 752                                 (start_address > TI_MAX_I2C_SIZE))
 753                 status = -ENODEV;
 754
 755 out:
 756         kfree(buffer);
 757         kfree(rom_desc);
 758         return status;
 759 }
 760
 761 static int get_manuf_info(struct edgeport_serial *serial, __u8 *buffer)
 762 {
 763         int status;
 764         int start_address;
 765         struct ti_i2c_desc *rom_desc;
 766         struct edge_ti_manuf_descriptor *desc;
 767         struct device *dev = &serial->serial->dev->dev;
 768
 769         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 770         if (!rom_desc)
 771                 return -ENOMEM;
 772
 773         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 774                                                                 rom_desc);
 775
 776         if (!start_address) {
 777                 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
 778                 status = -ENODEV;
 779                 goto exit;
 780         }
 781
 782         /* Read the descriptor data */
 783         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 784                                         le16_to_cpu(rom_desc->Size), buffer);
 785         if (status)
 786                 goto exit;
 787
 788         status = valid_csum(rom_desc, buffer);
 789
 790         desc = (struct edge_ti_manuf_descriptor *)buffer;
 791         dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
 792         dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
 793         dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
 794         dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
 795         dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
 796         dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
 797
 798 exit:
 799         kfree(rom_desc);
 800         return status;
 801 }
 802
 803 /* Build firmware header used for firmware update */
 804 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
 805 {
 806         __u8 *buffer;
 807         int buffer_size;
 808         int i;
 809         __u8 cs = 0;
 810         struct ti_i2c_desc *i2c_header;
 811         struct ti_i2c_image_header *img_header;
 812         struct ti_i2c_firmware_rec *firmware_rec;
 813         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 814
 815         /*
 816          * In order to update the I2C firmware we must change the type 2 record
 817          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 818          * Then while in boot mode, the driver will download the latest
 819          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 820          * device comes back up in download mode the driver will cause the new
 821          * firmware to be copied from the UMP Ram to I2C and the firmware will
 822          * update the record type from 0xf2 to 0x02.
 823          */
 824
 825         /*
 826          * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
 827          * Record)
 828          */
 829         buffer_size = (((1024 * 16) - 512 ) +
 830                         sizeof(struct ti_i2c_firmware_rec));
 831
 832         buffer = kmalloc(buffer_size, GFP_KERNEL);
 833         if (!buffer)
 834                 return -ENOMEM;
 835
 836         /* Set entire image of 0xffs */
 837         memset(buffer, 0xff, buffer_size);
 838
 839         /* Copy version number into firmware record */
 840         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 841
 842         firmware_rec->Ver_Major = fw_hdr->major_version;
 843         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 844
 845         /* Pointer to fw_down memory image */
 846         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 847
 848         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 849                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 850                 le16_to_cpu(img_header->Length));
 851
 852         for (i=0; i < buffer_size; i++) {
 853                 cs = (__u8)(cs + buffer[i]);
 854         }
 855
 856         kfree(buffer);
 857
 858         /* Build new header */
 859         i2c_header =  (struct ti_i2c_desc *)header;
 860         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 861
 862         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 863         i2c_header->Size        = cpu_to_le16(buffer_size);
 864         i2c_header->CheckSum    = cs;
 865         firmware_rec->Ver_Major = fw_hdr->major_version;
 866         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 867
 868         return 0;
 869 }
 870
 871 /* Try to figure out what type of I2c we have */
 872 static int i2c_type_bootmode(struct edgeport_serial *serial)
 873 {
 874         struct device *dev = &serial->serial->dev->dev;
 875         int status;
 876         u8 *data;
 877
 878         data = kmalloc(1, GFP_KERNEL);
 879         if (!data)
 880                 return -ENOMEM;
 881
 882         /* Try to read type 2 */
 883         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 884                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
 885         if (status)
 886                 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
 887         else
 888                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 889         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 890                 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
 891                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 892                 goto out;
 893         }
 894
 895         /* Try to read type 3 */
 896         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 897                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
 898         if (status)
 899                 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
 900         else
 901                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 902         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 903                 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
 904                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 905                 goto out;
 906         }
 907
 908         dev_dbg(dev, "%s - Unknown\n", __func__);
 909         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 910         status = -ENODEV;
 911 out:
 912         kfree(data);
 913         return status;
 914 }
 915
 916 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 917                                                 int length, int *num_sent)
 918 {
 919         int status;
 920
 921         status = usb_bulk_msg(serial->dev,
 922                         usb_sndbulkpipe(serial->dev,
 923                                 serial->port[0]->bulk_out_endpointAddress),
 924                         buffer, length, num_sent, 1000);
 925         return status;
 926 }
 927
 928 /* Download given firmware image to the device (IN BOOT MODE) */
 929 static int download_code(struct edgeport_serial *serial, __u8 *image,
 930                                                         int image_length)
 931 {
 932         int status = 0;
 933         int pos;
 934         int transfer;
 935         int done;
 936
 937         /* Transfer firmware image */
 938         for (pos = 0; pos < image_length; ) {
 939                 /* Read the next buffer from file */
 940                 transfer = image_length - pos;
 941                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 942                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
 943
 944                 /* Transfer data */
 945                 status = bulk_xfer(serial->serial, &image[pos],
 946                                                         transfer, &done);
 947                 if (status)
 948                         break;
 949                 /* Advance buffer pointer */
 950                 pos += done;
 951         }
 952
 953         return status;
 954 }
 955
 956 /* FIXME!!! */
 957 static int config_boot_dev(struct usb_device *dev)
 958 {
 959         return 0;
 960 }
 961
 962 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
 963 {
 964         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
 965 }
 966
 967 static int check_fw_sanity(struct edgeport_serial *serial,
 968                 const struct firmware *fw)
 969 {
 970         u16 length_total;
 971         u8 checksum = 0;
 972         int pos;
 973         struct device *dev = &serial->serial->interface->dev;
 974         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 975
 976         if (fw->size < sizeof(struct edgeport_fw_hdr)) {
 977                 dev_err(dev, "incomplete fw header\n");
 978                 return -EINVAL;
 979         }
 980
 981         length_total = le16_to_cpu(fw_hdr->length) +
 982                         sizeof(struct edgeport_fw_hdr);
 983
 984         if (fw->size != length_total) {
 985                 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
 986                                 length_total, fw->size);
 987                 return -EINVAL;
 988         }
 989
 990         for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
 991                 checksum += fw->data[pos];
 992
 993         if (checksum != fw_hdr->checksum) {
 994                 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
 995                                 fw_hdr->checksum, checksum);
 996                 return -EINVAL;
 997         }
 998
 999         return 0;
1000 }
1001
1002 /*
1003  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1004  *
1005  * This routine downloads the main operating code into the TI5052, using the
1006  * boot code already burned into E2PROM or ROM.
1007  */
1008 static int download_fw(struct edgeport_serial *serial)
1009 {
1010         struct device *dev = &serial->serial->interface->dev;
1011         int status = 0;
1012         struct usb_interface_descriptor *interface;
1013         const struct firmware *fw;
1014         const char *fw_name = "/*(DEBLOBBED)*/";
1015         struct edgeport_fw_hdr *fw_hdr;
1016
1017         status = reject_firmware(&fw, fw_name, dev);
1018         if (status) {
1019                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1020                                 fw_name, status);
1021                 return status;
1022         }
1023
1024         if (check_fw_sanity(serial, fw)) {
1025                 status = -EINVAL;
1026                 goto out;
1027         }
1028
1029         fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1030
1031         /* If on-board version is newer, "fw_version" will be updated later. */
1032         serial->fw_version = (fw_hdr->major_version << 8) +
1033                         fw_hdr->minor_version;
1034
1035         /*
1036          * This routine is entered by both the BOOT mode and the Download mode
1037          * We can determine which code is running by the reading the config
1038          * descriptor and if we have only one bulk pipe it is in boot mode
1039          */
1040         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1041
1042         /* Default to type 2 i2c */
1043         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1044
1045         status = choose_config(serial->serial->dev);
1046         if (status)
1047                 goto out;
1048
1049         interface = &serial->serial->interface->cur_altsetting->desc;
1050         if (!interface) {
1051                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1052                 status = -ENODEV;
1053                 goto out;
1054         }
1055
1056         /*
1057          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1058          * if we have more than one endpoint we are definitely in download
1059          * mode
1060          */
1061         if (interface->bNumEndpoints > 1) {
1062                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1063                 status = do_download_mode(serial, fw);
1064         } else {
1065                 /* Otherwise we will remain in configuring mode */
1066                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1067                 status = do_boot_mode(serial, fw);
1068         }
1069
1070 out:
1071         release_firmware(fw);
1072         return status;
1073 }
1074
1075 static int do_download_mode(struct edgeport_serial *serial,
1076                 const struct firmware *fw)
1077 {
1078         struct device *dev = &serial->serial->interface->dev;
1079         int status = 0;
1080         int start_address;
1081         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1082         int download_cur_ver;
1083         int download_new_ver;
1084         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1085         struct ti_i2c_desc *rom_desc;
1086
1087         dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1088
1089         status = check_i2c_image(serial);
1090         if (status) {
1091                 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1092                 return status;
1093         }
1094
1095         /*
1096          * Validate Hardware version number
1097          * Read Manufacturing Descriptor from TI Based Edgeport
1098          */
1099         ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1100         if (!ti_manuf_desc)
1101                 return -ENOMEM;
1102
1103         status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1104         if (status) {
1105                 kfree(ti_manuf_desc);
1106                 return status;
1107         }
1108
1109         /* Check version number of ION descriptor */
1110         if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1111                 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1112                         __func__, ti_cpu_rev(ti_manuf_desc));
1113                 kfree(ti_manuf_desc);
1114                 return -EINVAL;
1115         }
1116
1117         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1118         if (!rom_desc) {
1119                 kfree(ti_manuf_desc);
1120                 return -ENOMEM;
1121         }
1122
1123         /* Search for type 2 record (firmware record) */
1124         start_address = get_descriptor_addr(serial,
1125                         I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1126         if (start_address != 0) {
1127                 struct ti_i2c_firmware_rec *firmware_version;
1128                 u8 *record;
1129
1130                 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
1131                                 __func__);
1132
1133                 firmware_version = kmalloc(sizeof(*firmware_version),
1134                                                         GFP_KERNEL);
1135                 if (!firmware_version) {
1136                         kfree(rom_desc);
1137                         kfree(ti_manuf_desc);
1138                         return -ENOMEM;
1139                 }
1140
1141                 /*
1142                  * Validate version number
1143                  * Read the descriptor data
1144                  */
1145                 status = read_rom(serial, start_address +
1146                                 sizeof(struct ti_i2c_desc),
1147                                 sizeof(struct ti_i2c_firmware_rec),
1148                                 (__u8 *)firmware_version);
1149                 if (status) {
1150                         kfree(firmware_version);
1151                         kfree(rom_desc);
1152                         kfree(ti_manuf_desc);
1153                         return status;
1154                 }
1155
1156                 /*
1157                  * Check version number of download with current
1158                  * version in I2c
1159                  */
1160                 download_cur_ver = (firmware_version->Ver_Major << 8) +
1161                                    (firmware_version->Ver_Minor);
1162                 download_new_ver = (fw_hdr->major_version << 8) +
1163                                    (fw_hdr->minor_version);
1164
1165                 dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1166                         __func__, firmware_version->Ver_Major,
1167                         firmware_version->Ver_Minor,
1168                         fw_hdr->major_version, fw_hdr->minor_version);
1169
1170                 /*
1171                  * Check if we have an old version in the I2C and
1172                  * update if necessary
1173                  */
1174                 if (download_cur_ver < download_new_ver) {
1175                         dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1176                                 __func__,
1177                                 firmware_version->Ver_Major,
1178                                 firmware_version->Ver_Minor,
1179                                 fw_hdr->major_version,
1180                                 fw_hdr->minor_version);
1181
1182                         record = kmalloc(1, GFP_KERNEL);
1183                         if (!record) {
1184                                 kfree(firmware_version);
1185                                 kfree(rom_desc);
1186                                 kfree(ti_manuf_desc);
1187                                 return -ENOMEM;
1188                         }
1189                         /*
1190                          * In order to update the I2C firmware we must
1191                          * change the type 2 record to type 0xF2. This
1192                          * will force the UMP to come up in Boot Mode.
1193                          * Then while in boot mode, the driver will
1194                          * download the latest firmware (padded to
1195                          * 15.5k) into the UMP ram. Finally when the
1196                          * device comes back up in download mode the
1197                          * driver will cause the new firmware to be
1198                          * copied from the UMP Ram to I2C and the
1199                          * firmware will update the record type from
1200                          * 0xf2 to 0x02.
1201                          */
1202                         *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1203
1204                         /*
1205                          * Change the I2C Firmware record type to
1206                          * 0xf2 to trigger an update
1207                          */
1208                         status = write_rom(serial, start_address,
1209                                         sizeof(*record), record);
1210                         if (status) {
1211                                 kfree(record);
1212                                 kfree(firmware_version);
1213                                 kfree(rom_desc);
1214                                 kfree(ti_manuf_desc);
1215                                 return status;
1216                         }
1217
1218                         /*
1219                          * verify the write -- must do this in order
1220                          * for write to complete before we do the
1221                          * hardware reset
1222                          */
1223                         status = read_rom(serial,
1224                                                 start_address,
1225                                                 sizeof(*record),
1226                                                 record);
1227                         if (status) {
1228                                 kfree(record);
1229                                 kfree(firmware_version);
1230                                 kfree(rom_desc);
1231                                 kfree(ti_manuf_desc);
1232                                 return status;
1233                         }
1234
1235                         if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1236                                 dev_err(dev, "%s - error resetting device\n",
1237                                                 __func__);
1238                                 kfree(record);
1239                                 kfree(firmware_version);
1240                                 kfree(rom_desc);
1241                                 kfree(ti_manuf_desc);
1242                                 return -ENODEV;
1243                         }
1244
1245                         dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1246
1247                         /* Reset UMP -- Back to BOOT MODE */
1248                         status = ti_vsend_sync(serial->serial->dev,
1249                                         UMPC_HARDWARE_RESET,
1250                                         0, 0, NULL, 0,
1251                                         TI_VSEND_TIMEOUT_DEFAULT);
1252
1253                         dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
1254                                         __func__, status);
1255
1256                         /* return an error on purpose. */
1257                         kfree(record);
1258                         kfree(firmware_version);
1259                         kfree(rom_desc);
1260                         kfree(ti_manuf_desc);
1261                         return -ENODEV;
1262                 }
1263                 /* Same or newer fw version is already loaded */
1264                 serial->fw_version = download_cur_ver;
1265                 kfree(firmware_version);
1266         }
1267         /* Search for type 0xF2 record (firmware blank record) */
1268         else {
1269                 start_address = get_descriptor_addr(serial,
1270                                 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
1271                 if (start_address != 0) {
1272 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1273                                 sizeof(struct ti_i2c_firmware_rec))
1274                         __u8 *header;
1275                         __u8 *vheader;
1276
1277                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1278                         if (!header) {
1279                                 kfree(rom_desc);
1280                                 kfree(ti_manuf_desc);
1281                                 return -ENOMEM;
1282                         }
1283
1284                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1285                         if (!vheader) {
1286                                 kfree(header);
1287                                 kfree(rom_desc);
1288                                 kfree(ti_manuf_desc);
1289                                 return -ENOMEM;
1290                         }
1291
1292                         dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
1293                                         __func__);
1294
1295                         /*
1296                          * In order to update the I2C firmware we must change
1297                          * the type 2 record to type 0xF2. This will force the
1298                          * UMP to come up in Boot Mode.  Then while in boot
1299                          * mode, the driver will download the latest firmware
1300                          * (padded to 15.5k) into the UMP ram. Finally when the
1301                          * device comes back up in download mode the driver
1302                          * will cause the new firmware to be copied from the
1303                          * UMP Ram to I2C and the firmware will update the
1304                          * record type from 0xf2 to 0x02.
1305                          */
1306                         status = build_i2c_fw_hdr(header, fw);
1307                         if (status) {
1308                                 kfree(vheader);
1309                                 kfree(header);
1310                                 kfree(rom_desc);
1311                                 kfree(ti_manuf_desc);
1312                                 return -EINVAL;
1313                         }
1314
1315                         /*
1316                          * Update I2C with type 0xf2 record with correct
1317                          * size and checksum
1318                          */
1319                         status = write_rom(serial,
1320                                                 start_address,
1321                                                 HEADER_SIZE,
1322                                                 header);
1323                         if (status) {
1324                                 kfree(vheader);
1325                                 kfree(header);
1326                                 kfree(rom_desc);
1327                                 kfree(ti_manuf_desc);
1328                                 return -EINVAL;
1329                         }
1330
1331                         /*
1332                          * verify the write -- must do this in order for
1333                          * write to complete before we do the hardware reset
1334                          */
1335                         status = read_rom(serial, start_address,
1336                                                         HEADER_SIZE, vheader);
1337
1338                         if (status) {
1339                                 dev_dbg(dev, "%s - can't read header back\n",
1340                                                 __func__);
1341                                 kfree(vheader);
1342                                 kfree(header);
1343                                 kfree(rom_desc);
1344                                 kfree(ti_manuf_desc);
1345                                 return status;
1346                         }
1347                         if (memcmp(vheader, header, HEADER_SIZE)) {
1348                                 dev_dbg(dev, "%s - write download record failed\n",
1349                                                 __func__);
1350                                 kfree(vheader);
1351                                 kfree(header);
1352                                 kfree(rom_desc);
1353                                 kfree(ti_manuf_desc);
1354                                 return -EINVAL;
1355                         }
1356
1357                         kfree(vheader);
1358                         kfree(header);
1359
1360                         dev_dbg(dev, "%s - Start firmware update\n", __func__);
1361
1362                         /* Tell firmware to copy download image into I2C */
1363                         status = ti_vsend_sync(serial->serial->dev,
1364                                         UMPC_COPY_DNLD_TO_I2C,
1365                                         0, 0, NULL, 0,
1366                                         TI_VSEND_TIMEOUT_FW_DOWNLOAD);
1367
1368                         dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
1369                                         status);
1370                         if (status) {
1371                                 dev_err(dev,
1372                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1373                                         __func__);
1374                                 kfree(rom_desc);
1375                                 kfree(ti_manuf_desc);
1376                                 return status;
1377                         }
1378                 }
1379         }
1380
1381         /* The device is running the download code */
1382         kfree(rom_desc);
1383         kfree(ti_manuf_desc);
1384         return 0;
1385 }
1386
1387 static int do_boot_mode(struct edgeport_serial *serial,
1388                 const struct firmware *fw)
1389 {
1390         struct device *dev = &serial->serial->interface->dev;
1391         int status = 0;
1392         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1393         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1394
1395         dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1396
1397         /* Configure the TI device so we can use the BULK pipes for download */
1398         status = config_boot_dev(serial->serial->dev);
1399         if (status)
1400                 return status;
1401
1402         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1403                                                         != USB_VENDOR_ID_ION) {
1404                 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1405                         le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1406                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1407                 goto stayinbootmode;
1408         }
1409
1410         /*
1411          * We have an ION device (I2c Must be programmed)
1412          * Determine I2C image type
1413          */
1414         if (i2c_type_bootmode(serial))
1415                 goto stayinbootmode;
1416
1417         /* Check for ION Vendor ID and that the I2C is valid */
1418         if (!check_i2c_image(serial)) {
1419                 struct ti_i2c_image_header *header;
1420                 int i;
1421                 __u8 cs = 0;
1422                 __u8 *buffer;
1423                 int buffer_size;
1424
1425                 /*
1426                  * Validate Hardware version number
1427                  * Read Manufacturing Descriptor from TI Based Edgeport
1428                  */
1429                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1430                 if (!ti_manuf_desc)
1431                         return -ENOMEM;
1432
1433                 status = get_manuf_info(serial, (__u8 *)ti_manuf_desc);
1434                 if (status) {
1435                         kfree(ti_manuf_desc);
1436                         goto stayinbootmode;
1437                 }
1438
1439                 /* Check for version 2 */
1440                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1441                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1442                                 __func__, ti_cpu_rev(ti_manuf_desc));
1443                         kfree(ti_manuf_desc);
1444                         goto stayinbootmode;
1445                 }
1446
1447                 kfree(ti_manuf_desc);
1448
1449                 /*
1450                  * In order to update the I2C firmware we must change the type
1451                  * 2 record to type 0xF2. This will force the UMP to come up
1452                  * in Boot Mode.  Then while in boot mode, the driver will
1453                  * download the latest firmware (padded to 15.5k) into the
1454                  * UMP ram. Finally when the device comes back up in download
1455                  * mode the driver will cause the new firmware to be copied
1456                  * from the UMP Ram to I2C and the firmware will update the
1457                  * record type from 0xf2 to 0x02.
1458                  *
1459                  * Do we really have to copy the whole firmware image,
1460                  * or could we do this in place!
1461                  */
1462
1463                 /* Allocate a 15.5k buffer + 3 byte header */
1464                 buffer_size = (((1024 * 16) - 512) +
1465                                         sizeof(struct ti_i2c_image_header));
1466                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1467                 if (!buffer)
1468                         return -ENOMEM;
1469
1470                 /* Initialize the buffer to 0xff (pad the buffer) */
1471                 memset(buffer, 0xff, buffer_size);
1472                 memcpy(buffer, &fw->data[4], fw->size - 4);
1473
1474                 for (i = sizeof(struct ti_i2c_image_header);
1475                                 i < buffer_size; i++) {
1476                         cs = (__u8)(cs + buffer[i]);
1477                 }
1478
1479                 header = (struct ti_i2c_image_header *)buffer;
1480
1481                 /* update length and checksum after padding */
1482                 header->Length   = cpu_to_le16((__u16)(buffer_size -
1483                                         sizeof(struct ti_i2c_image_header)));
1484                 header->CheckSum = cs;
1485
1486                 /* Download the operational code  */
1487                 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
1488                                 __func__,
1489                                 fw_hdr->major_version, fw_hdr->minor_version);
1490                 status = download_code(serial, buffer, buffer_size);
1491
1492                 kfree(buffer);
1493
1494                 if (status) {
1495                         dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1496                         return status;
1497                 }
1498
1499                 /* Device will reboot */
1500                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1501
1502                 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1503
1504                 return 1;
1505         }
1506
1507 stayinbootmode:
1508         /* Eprom is invalid or blank stay in boot mode */
1509         dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1510         serial->product_info.TiMode = TI_MODE_BOOT;
1511
1512         return 1;
1513 }
1514
1515 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1516 {
1517         int port_number = port->port->port_number;
1518
1519         on = !!on;      /* 1 or 0 not bitmask */
1520         return send_cmd(port->port->serial->dev,
1521                         feature, (__u8)(UMPM_UART1_PORT + port_number),
1522                         on, NULL, 0);
1523 }
1524
1525 static int restore_mcr(struct edgeport_port *port, __u8 mcr)
1526 {
1527         int status = 0;
1528
1529         dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1530
1531         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1532         if (status)
1533                 return status;
1534         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1535         if (status)
1536                 return status;
1537         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1538 }
1539
1540 /* Convert TI LSR to standard UART flags */
1541 static __u8 map_line_status(__u8 ti_lsr)
1542 {
1543         __u8 lsr = 0;
1544
1545 #define MAP_FLAG(flagUmp, flagUart)    \
1546         if (ti_lsr & flagUmp) \
1547                 lsr |= flagUart;
1548
1549         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1550         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1551         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1552         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1553         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1554         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1555
1556 #undef MAP_FLAG
1557
1558         return lsr;
1559 }
1560
1561 static void handle_new_msr(struct edgeport_port *edge_port, __u8 msr)
1562 {
1563         struct async_icount *icount;
1564         struct tty_struct *tty;
1565
1566         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1567
1568         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1569                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1570                 icount = &edge_port->port->icount;
1571
1572                 /* update input line counters */
1573                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1574                         icount->cts++;
1575                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1576                         icount->dsr++;
1577                 if (msr & EDGEPORT_MSR_DELTA_CD)
1578                         icount->dcd++;
1579                 if (msr & EDGEPORT_MSR_DELTA_RI)
1580                         icount->rng++;
1581                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1582         }
1583
1584         /* Save the new modem status */
1585         edge_port->shadow_msr = msr & 0xf0;
1586
1587         tty = tty_port_tty_get(&edge_port->port->port);
1588         /* handle CTS flow control */
1589         if (tty && C_CRTSCTS(tty)) {
1590                 if (msr & EDGEPORT_MSR_CTS)
1591                         tty_wakeup(tty);
1592         }
1593         tty_kref_put(tty);
1594 }
1595
1596 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1597                                                         __u8 lsr, __u8 data)
1598 {
1599         struct async_icount *icount;
1600         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1601                                                 LSR_FRM_ERR | LSR_BREAK));
1602
1603         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1604
1605         edge_port->shadow_lsr = lsr;
1606
1607         if (new_lsr & LSR_BREAK)
1608                 /*
1609                  * Parity and Framing errors only count if they
1610                  * occur exclusive of a break being received.
1611                  */
1612                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1613
1614         /* Place LSR data byte into Rx buffer */
1615         if (lsr_data)
1616                 edge_tty_recv(edge_port->port, &data, 1);
1617
1618         /* update input line counters */
1619         icount = &edge_port->port->icount;
1620         if (new_lsr & LSR_BREAK)
1621                 icount->brk++;
1622         if (new_lsr & LSR_OVER_ERR)
1623                 icount->overrun++;
1624         if (new_lsr & LSR_PAR_ERR)
1625                 icount->parity++;
1626         if (new_lsr & LSR_FRM_ERR)
1627                 icount->frame++;
1628 }
1629
1630 static void edge_interrupt_callback(struct urb *urb)
1631 {
1632         struct edgeport_serial *edge_serial = urb->context;
1633         struct usb_serial_port *port;
1634         struct edgeport_port *edge_port;
1635         struct device *dev;
1636         unsigned char *data = urb->transfer_buffer;
1637         int length = urb->actual_length;
1638         int port_number;
1639         int function;
1640         int retval;
1641         __u8 lsr;
1642         __u8 msr;
1643         int status = urb->status;
1644
1645         switch (status) {
1646         case 0:
1647                 /* success */
1648                 break;
1649         case -ECONNRESET:
1650         case -ENOENT:
1651         case -ESHUTDOWN:
1652                 /* this urb is terminated, clean up */
1653                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1654                     __func__, status);
1655                 return;
1656         default:
1657                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1658                         "%d\n", __func__, status);
1659                 goto exit;
1660         }
1661
1662         if (!length) {
1663                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1664                 goto exit;
1665         }
1666
1667         dev = &edge_serial->serial->dev->dev;
1668         usb_serial_debug_data(dev, __func__, length, data);
1669
1670         if (length != 2) {
1671                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1672                 goto exit;
1673         }
1674
1675         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1676         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1677         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1678                 port_number, function, data[1]);
1679
1680         if (port_number >= edge_serial->serial->num_ports) {
1681                 dev_err(dev, "bad port number %d\n", port_number);
1682                 goto exit;
1683         }
1684
1685         port = edge_serial->serial->port[port_number];
1686         edge_port = usb_get_serial_port_data(port);
1687         if (!edge_port) {
1688                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1689                 return;
1690         }
1691         switch (function) {
1692         case TIUMP_INTERRUPT_CODE_LSR:
1693                 lsr = map_line_status(data[1]);
1694                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1695                         /*
1696                          * Save the LSR event for bulk read completion routine
1697                          */
1698                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1699                                 __func__, port_number, lsr);
1700                         edge_port->lsr_event = 1;
1701                         edge_port->lsr_mask = lsr;
1702                 } else {
1703                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1704                                 __func__, port_number, lsr);
1705                         handle_new_lsr(edge_port, 0, lsr, 0);
1706                 }
1707                 break;
1708
1709         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1710                 /* Copy MSR from UMP */
1711                 msr = data[1];
1712                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1713                         __func__, port_number, msr);
1714                 handle_new_msr(edge_port, msr);
1715                 break;
1716
1717         default:
1718                 dev_err(&urb->dev->dev,
1719                         "%s - Unknown Interrupt code from UMP %x\n",
1720                         __func__, data[1]);
1721                 break;
1722
1723         }
1724
1725 exit:
1726         retval = usb_submit_urb(urb, GFP_ATOMIC);
1727         if (retval)
1728                 dev_err(&urb->dev->dev,
1729                         "%s - usb_submit_urb failed with result %d\n",
1730                          __func__, retval);
1731 }
1732
1733 static void edge_bulk_in_callback(struct urb *urb)
1734 {
1735         struct edgeport_port *edge_port = urb->context;
1736         struct device *dev = &edge_port->port->dev;
1737         unsigned char *data = urb->transfer_buffer;
1738         int retval = 0;
1739         int port_number;
1740         int status = urb->status;
1741
1742         switch (status) {
1743         case 0:
1744                 /* success */
1745                 break;
1746         case -ECONNRESET:
1747         case -ENOENT:
1748         case -ESHUTDOWN:
1749                 /* this urb is terminated, clean up */
1750                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1751                 return;
1752         default:
1753                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1754         }
1755
1756         if (status == -EPIPE)
1757                 goto exit;
1758
1759         if (status) {
1760                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1761                 return;
1762         }
1763
1764         port_number = edge_port->port->port_number;
1765
1766         if (urb->actual_length > 0 && edge_port->lsr_event) {
1767                 edge_port->lsr_event = 0;
1768                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1769                         __func__, port_number, edge_port->lsr_mask, *data);
1770                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1771                 /* Adjust buffer length/pointer */
1772                 --urb->actual_length;
1773                 ++data;
1774         }
1775
1776         if (urb->actual_length) {
1777                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1778                 if (edge_port->close_pending)
1779                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1780                                                                 __func__);
1781                 else
1782                         edge_tty_recv(edge_port->port, data,
1783                                         urb->actual_length);
1784                 edge_port->port->icount.rx += urb->actual_length;
1785         }
1786
1787 exit:
1788         /* continue read unless stopped */
1789         spin_lock(&edge_port->ep_lock);
1790         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1791                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1792         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1793                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1794
1795         spin_unlock(&edge_port->ep_lock);
1796         if (retval)
1797                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1798 }
1799
1800 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1801                 int length)
1802 {
1803         int queued;
1804
1805         queued = tty_insert_flip_string(&port->port, data, length);
1806         if (queued < length)
1807                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1808                         __func__, length - queued);
1809         tty_flip_buffer_push(&port->port);
1810 }
1811
1812 static void edge_bulk_out_callback(struct urb *urb)
1813 {
1814         struct usb_serial_port *port = urb->context;
1815         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1816         int status = urb->status;
1817         struct tty_struct *tty;
1818
1819         edge_port->ep_write_urb_in_use = 0;
1820
1821         switch (status) {
1822         case 0:
1823                 /* success */
1824                 break;
1825         case -ECONNRESET:
1826         case -ENOENT:
1827         case -ESHUTDOWN:
1828                 /* this urb is terminated, clean up */
1829                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1830                     __func__, status);
1831                 return;
1832         default:
1833                 dev_err_console(port, "%s - nonzero write bulk status "
1834                         "received: %d\n", __func__, status);
1835         }
1836
1837         /* send any buffered data */
1838         tty = tty_port_tty_get(&port->port);
1839         edge_send(port, tty);
1840         tty_kref_put(tty);
1841 }
1842
1843 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1844 {
1845         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1846         struct edgeport_serial *edge_serial;
1847         struct usb_device *dev;
1848         struct urb *urb;
1849         int port_number;
1850         int status;
1851         u16 open_settings;
1852         u8 transaction_timeout;
1853
1854         if (edge_port == NULL)
1855                 return -ENODEV;
1856
1857         port_number = port->port_number;
1858
1859         dev = port->serial->dev;
1860
1861         /* turn off loopback */
1862         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1863         if (status) {
1864                 dev_err(&port->dev,
1865                                 "%s - cannot send clear loopback command, %d\n",
1866                         __func__, status);
1867                 return status;
1868         }
1869
1870         /* set up the port settings */
1871         if (tty)
1872                 edge_set_termios(tty, port, &tty->termios);
1873
1874         /* open up the port */
1875
1876         /* milliseconds to timeout for DMA transfer */
1877         transaction_timeout = 2;
1878
1879         edge_port->ump_read_timeout =
1880                                 max(20, ((transaction_timeout * 3) / 2));
1881
1882         /* milliseconds to timeout for DMA transfer */
1883         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1884                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1885                              (transaction_timeout << 2));
1886
1887         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1888
1889         /* Tell TI to open and start the port */
1890         status = send_cmd(dev, UMPC_OPEN_PORT,
1891                 (u8)(UMPM_UART1_PORT + port_number), open_settings, NULL, 0);
1892         if (status) {
1893                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1894                                                         __func__, status);
1895                 return status;
1896         }
1897
1898         /* Start the DMA? */
1899         status = send_cmd(dev, UMPC_START_PORT,
1900                 (u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
1901         if (status) {
1902                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1903                                                         __func__, status);
1904                 return status;
1905         }
1906
1907         /* Clear TX and RX buffers in UMP */
1908         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1909         if (status) {
1910                 dev_err(&port->dev,
1911                         "%s - cannot send clear buffers command, %d\n",
1912                         __func__, status);
1913                 return status;
1914         }
1915
1916         /* Read Initial MSR */
1917         status = ti_vread_sync(dev, UMPC_READ_MSR, 0,
1918                                 (__u16)(UMPM_UART1_PORT + port_number),
1919                                 &edge_port->shadow_msr, 1);
1920         if (status) {
1921                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1922                                                         __func__, status);
1923                 return status;
1924         }
1925
1926         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1927
1928         /* Set Initial MCR */
1929         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1930         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1931
1932         edge_serial = edge_port->edge_serial;
1933         if (mutex_lock_interruptible(&edge_serial->es_lock))
1934                 return -ERESTARTSYS;
1935         if (edge_serial->num_ports_open == 0) {
1936                 /* we are the first port to open, post the interrupt urb */
1937                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1938                 if (!urb) {
1939                         dev_err(&port->dev,
1940                                 "%s - no interrupt urb present, exiting\n",
1941                                 __func__);
1942                         status = -EINVAL;
1943                         goto release_es_lock;
1944                 }
1945                 urb->context = edge_serial;
1946                 status = usb_submit_urb(urb, GFP_KERNEL);
1947                 if (status) {
1948                         dev_err(&port->dev,
1949                                 "%s - usb_submit_urb failed with value %d\n",
1950                                         __func__, status);
1951                         goto release_es_lock;
1952                 }
1953         }
1954
1955         /*
1956          * reset the data toggle on the bulk endpoints to work around bug in
1957          * host controllers where things get out of sync some times
1958          */
1959         usb_clear_halt(dev, port->write_urb->pipe);
1960         usb_clear_halt(dev, port->read_urb->pipe);
1961
1962         /* start up our bulk read urb */
1963         urb = port->read_urb;
1964         if (!urb) {
1965                 dev_err(&port->dev, "%s - no read urb present, exiting\n",
1966                                                                 __func__);
1967                 status = -EINVAL;
1968                 goto unlink_int_urb;
1969         }
1970         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1971         urb->context = edge_port;
1972         status = usb_submit_urb(urb, GFP_KERNEL);
1973         if (status) {
1974                 dev_err(&port->dev,
1975                         "%s - read bulk usb_submit_urb failed with value %d\n",
1976                                 __func__, status);
1977                 goto unlink_int_urb;
1978         }
1979
1980         ++edge_serial->num_ports_open;
1981
1982         goto release_es_lock;
1983
1984 unlink_int_urb:
1985         if (edge_port->edge_serial->num_ports_open == 0)
1986                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1987 release_es_lock:
1988         mutex_unlock(&edge_serial->es_lock);
1989         return status;
1990 }
1991
1992 static void edge_close(struct usb_serial_port *port)
1993 {
1994         struct edgeport_serial *edge_serial;
1995         struct edgeport_port *edge_port;
1996         struct usb_serial *serial = port->serial;
1997         unsigned long flags;
1998         int port_number;
1999
2000         edge_serial = usb_get_serial_data(port->serial);
2001         edge_port = usb_get_serial_port_data(port);
2002         if (edge_serial == NULL || edge_port == NULL)
2003                 return;
2004
2005         /*
2006          * The bulkreadcompletion routine will check
2007          * this flag and dump add read data
2008          */
2009         edge_port->close_pending = 1;
2010
2011         usb_kill_urb(port->read_urb);
2012         usb_kill_urb(port->write_urb);
2013         edge_port->ep_write_urb_in_use = 0;
2014         spin_lock_irqsave(&edge_port->ep_lock, flags);
2015         kfifo_reset_out(&port->write_fifo);
2016         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2017
2018         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
2019         port_number = port->port_number;
2020         send_cmd(serial->dev, UMPC_CLOSE_PORT,
2021                      (__u8)(UMPM_UART1_PORT + port_number), 0, NULL, 0);
2022
2023         mutex_lock(&edge_serial->es_lock);
2024         --edge_port->edge_serial->num_ports_open;
2025         if (edge_port->edge_serial->num_ports_open <= 0) {
2026                 /* last port is now closed, let's shut down our interrupt urb */
2027                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2028                 edge_port->edge_serial->num_ports_open = 0;
2029         }
2030         mutex_unlock(&edge_serial->es_lock);
2031         edge_port->close_pending = 0;
2032 }
2033
2034 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2035                                 const unsigned char *data, int count)
2036 {
2037         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2038
2039         if (count == 0) {
2040                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2041                 return 0;
2042         }
2043
2044         if (edge_port == NULL)
2045                 return -ENODEV;
2046         if (edge_port->close_pending == 1)
2047                 return -ENODEV;
2048
2049         count = kfifo_in_locked(&port->write_fifo, data, count,
2050                                                         &edge_port->ep_lock);
2051         edge_send(port, tty);
2052
2053         return count;
2054 }
2055
2056 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
2057 {
2058         int count, result;
2059         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2060         unsigned long flags;
2061
2062         spin_lock_irqsave(&edge_port->ep_lock, flags);
2063
2064         if (edge_port->ep_write_urb_in_use) {
2065                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2066                 return;
2067         }
2068
2069         count = kfifo_out(&port->write_fifo,
2070                                 port->write_urb->transfer_buffer,
2071                                 port->bulk_out_size);
2072
2073         if (count == 0) {
2074                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2075                 return;
2076         }
2077
2078         edge_port->ep_write_urb_in_use = 1;
2079
2080         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2081
2082         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2083
2084         /* set up our urb */
2085         port->write_urb->transfer_buffer_length = count;
2086
2087         /* send the data out the bulk port */
2088         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2089         if (result) {
2090                 dev_err_console(port,
2091                         "%s - failed submitting write urb, error %d\n",
2092                                 __func__, result);
2093                 edge_port->ep_write_urb_in_use = 0;
2094                 /* TODO: reschedule edge_send */
2095         } else
2096                 edge_port->port->icount.tx += count;
2097
2098         /*
2099          * wakeup any process waiting for writes to complete
2100          * there is now more room in the buffer for new writes
2101          */
2102         if (tty)
2103                 tty_wakeup(tty);
2104 }
2105
2106 static int edge_write_room(struct tty_struct *tty)
2107 {
2108         struct usb_serial_port *port = tty->driver_data;
2109         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2110         int room = 0;
2111         unsigned long flags;
2112
2113         if (edge_port == NULL)
2114                 return 0;
2115         if (edge_port->close_pending == 1)
2116                 return 0;
2117
2118         spin_lock_irqsave(&edge_port->ep_lock, flags);
2119         room = kfifo_avail(&port->write_fifo);
2120         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2121
2122         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
2123         return room;
2124 }
2125
2126 static int edge_chars_in_buffer(struct tty_struct *tty)
2127 {
2128         struct usb_serial_port *port = tty->driver_data;
2129         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2130         int chars = 0;
2131         unsigned long flags;
2132         if (edge_port == NULL)
2133                 return 0;
2134
2135         spin_lock_irqsave(&edge_port->ep_lock, flags);
2136         chars = kfifo_len(&port->write_fifo);
2137         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2138
2139         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
2140         return chars;
2141 }
2142
2143 static bool edge_tx_empty(struct usb_serial_port *port)
2144 {
2145         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2146         int ret;
2147
2148         ret = tx_active(edge_port);
2149         if (ret > 0)
2150                 return false;
2151
2152         return true;
2153 }
2154
2155 static void edge_throttle(struct tty_struct *tty)
2156 {
2157         struct usb_serial_port *port = tty->driver_data;
2158         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2159         int status;
2160
2161         if (edge_port == NULL)
2162                 return;
2163
2164         /* if we are implementing XON/XOFF, send the stop character */
2165         if (I_IXOFF(tty)) {
2166                 unsigned char stop_char = STOP_CHAR(tty);
2167                 status = edge_write(tty, port, &stop_char, 1);
2168                 if (status <= 0) {
2169                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2170                 }
2171         }
2172
2173         /*
2174          * if we are implementing RTS/CTS, stop reads
2175          * and the Edgeport will clear the RTS line
2176          */
2177         if (C_CRTSCTS(tty))
2178                 stop_read(edge_port);
2179
2180 }
2181
2182 static void edge_unthrottle(struct tty_struct *tty)
2183 {
2184         struct usb_serial_port *port = tty->driver_data;
2185         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2186         int status;
2187
2188         if (edge_port == NULL)
2189                 return;
2190
2191         /* if we are implementing XON/XOFF, send the start character */
2192         if (I_IXOFF(tty)) {
2193                 unsigned char start_char = START_CHAR(tty);
2194                 status = edge_write(tty, port, &start_char, 1);
2195                 if (status <= 0) {
2196                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2197                 }
2198         }
2199         /*
2200          * if we are implementing RTS/CTS, restart reads
2201          * are the Edgeport will assert the RTS line
2202          */
2203         if (C_CRTSCTS(tty)) {
2204                 status = restart_read(edge_port);
2205                 if (status)
2206                         dev_err(&port->dev,
2207                                 "%s - read bulk usb_submit_urb failed: %d\n",
2208                                                         __func__, status);
2209         }
2210
2211 }
2212
2213 static void stop_read(struct edgeport_port *edge_port)
2214 {
2215         unsigned long flags;
2216
2217         spin_lock_irqsave(&edge_port->ep_lock, flags);
2218
2219         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2220                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2221         edge_port->shadow_mcr &= ~MCR_RTS;
2222
2223         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2224 }
2225
2226 static int restart_read(struct edgeport_port *edge_port)
2227 {
2228         struct urb *urb;
2229         int status = 0;
2230         unsigned long flags;
2231
2232         spin_lock_irqsave(&edge_port->ep_lock, flags);
2233
2234         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2235                 urb = edge_port->port->read_urb;
2236                 status = usb_submit_urb(urb, GFP_ATOMIC);
2237         }
2238         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2239         edge_port->shadow_mcr |= MCR_RTS;
2240
2241         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2242
2243         return status;
2244 }
2245
2246 static void change_port_settings(struct tty_struct *tty,
2247                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2248 {
2249         struct device *dev = &edge_port->port->dev;
2250         struct ump_uart_config *config;
2251         int baud;
2252         unsigned cflag;
2253         int status;
2254         int port_number = edge_port->port->port_number;
2255
2256         config = kmalloc (sizeof (*config), GFP_KERNEL);
2257         if (!config) {
2258                 tty->termios = *old_termios;
2259                 return;
2260         }
2261
2262         cflag = tty->termios.c_cflag;
2263
2264         config->wFlags = 0;
2265
2266         /* These flags must be set */
2267         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2268         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2269         config->bUartMode = (__u8)(edge_port->bUartMode);
2270
2271         switch (cflag & CSIZE) {
2272         case CS5:
2273                     config->bDataBits = UMP_UART_CHAR5BITS;
2274                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2275                     break;
2276         case CS6:
2277                     config->bDataBits = UMP_UART_CHAR6BITS;
2278                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2279                     break;
2280         case CS7:
2281                     config->bDataBits = UMP_UART_CHAR7BITS;
2282                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2283                     break;
2284         default:
2285         case CS8:
2286                     config->bDataBits = UMP_UART_CHAR8BITS;
2287                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2288                             break;
2289         }
2290
2291         if (cflag & PARENB) {
2292                 if (cflag & PARODD) {
2293                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2294                         config->bParity = UMP_UART_ODDPARITY;
2295                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2296                 } else {
2297                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2298                         config->bParity = UMP_UART_EVENPARITY;
2299                         dev_dbg(dev, "%s - parity = even\n", __func__);
2300                 }
2301         } else {
2302                 config->bParity = UMP_UART_NOPARITY;
2303                 dev_dbg(dev, "%s - parity = none\n", __func__);
2304         }
2305
2306         if (cflag & CSTOPB) {
2307                 config->bStopBits = UMP_UART_STOPBIT2;
2308                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2309         } else {
2310                 config->bStopBits = UMP_UART_STOPBIT1;
2311                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2312         }
2313
2314         /* figure out the flow control settings */
2315         if (cflag & CRTSCTS) {
2316                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2317                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2318                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2319         } else {
2320                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2321                 restart_read(edge_port);
2322         }
2323
2324         /*
2325          * if we are implementing XON/XOFF, set the start and stop
2326          * character in the device
2327          */
2328         config->cXon  = START_CHAR(tty);
2329         config->cXoff = STOP_CHAR(tty);
2330
2331         /* if we are implementing INBOUND XON/XOFF */
2332         if (I_IXOFF(tty)) {
2333                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2334                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2335                         __func__, config->cXon, config->cXoff);
2336         } else
2337                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2338
2339         /* if we are implementing OUTBOUND XON/XOFF */
2340         if (I_IXON(tty)) {
2341                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2342                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2343                         __func__, config->cXon, config->cXoff);
2344         } else
2345                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2346
2347         tty->termios.c_cflag &= ~CMSPAR;
2348
2349         /* Round the baud rate */
2350         baud = tty_get_baud_rate(tty);
2351         if (!baud) {
2352                 /* pick a default, any default... */
2353                 baud = 9600;
2354         } else {
2355                 /* Avoid a zero divisor. */
2356                 baud = min(baud, 461550);
2357                 tty_encode_baud_rate(tty, baud, baud);
2358         }
2359
2360         edge_port->baud_rate = baud;
2361         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2362
2363         /* FIXME: Recompute actual baud from divisor here */
2364
2365         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2366
2367         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2368         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2369         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2370         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2371         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2372         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2373         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2374         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2375
2376         /* move the word values into big endian mode */
2377         cpu_to_be16s(&config->wFlags);
2378         cpu_to_be16s(&config->wBaudRate);
2379
2380         status = send_cmd(edge_port->port->serial->dev, UMPC_SET_CONFIG,
2381                                 (__u8)(UMPM_UART1_PORT + port_number),
2382                                 0, (__u8 *)config, sizeof(*config));
2383         if (status)
2384                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2385                         __func__, status);
2386         kfree(config);
2387 }
2388
2389 static void edge_set_termios(struct tty_struct *tty,
2390                 struct usb_serial_port *port, struct ktermios *old_termios)
2391 {
2392         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2393         unsigned int cflag;
2394
2395         cflag = tty->termios.c_cflag;
2396
2397         dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2398                 tty->termios.c_cflag, tty->termios.c_iflag);
2399         dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2400                 old_termios->c_cflag, old_termios->c_iflag);
2401
2402         if (edge_port == NULL)
2403                 return;
2404         /* change the port settings to the new ones specified */
2405         change_port_settings(tty, edge_port, old_termios);
2406 }
2407
2408 static int edge_tiocmset(struct tty_struct *tty,
2409                                         unsigned int set, unsigned int clear)
2410 {
2411         struct usb_serial_port *port = tty->driver_data;
2412         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2413         unsigned int mcr;
2414         unsigned long flags;
2415
2416         spin_lock_irqsave(&edge_port->ep_lock, flags);
2417         mcr = edge_port->shadow_mcr;
2418         if (set & TIOCM_RTS)
2419                 mcr |= MCR_RTS;
2420         if (set & TIOCM_DTR)
2421                 mcr |= MCR_DTR;
2422         if (set & TIOCM_LOOP)
2423                 mcr |= MCR_LOOPBACK;
2424
2425         if (clear & TIOCM_RTS)
2426                 mcr &= ~MCR_RTS;
2427         if (clear & TIOCM_DTR)
2428                 mcr &= ~MCR_DTR;
2429         if (clear & TIOCM_LOOP)
2430                 mcr &= ~MCR_LOOPBACK;
2431
2432         edge_port->shadow_mcr = mcr;
2433         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2434
2435         restore_mcr(edge_port, mcr);
2436         return 0;
2437 }
2438
2439 static int edge_tiocmget(struct tty_struct *tty)
2440 {
2441         struct usb_serial_port *port = tty->driver_data;
2442         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2443         unsigned int result = 0;
2444         unsigned int msr;
2445         unsigned int mcr;
2446         unsigned long flags;
2447
2448         spin_lock_irqsave(&edge_port->ep_lock, flags);
2449
2450         msr = edge_port->shadow_msr;
2451         mcr = edge_port->shadow_mcr;
2452         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2453                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2454                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2455                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2456                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2457                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2458
2459
2460         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2461         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2462
2463         return result;
2464 }
2465
2466 static int get_serial_info(struct edgeport_port *edge_port,
2467                                 struct serial_struct __user *retinfo)
2468 {
2469         struct serial_struct tmp;
2470         unsigned cwait;
2471
2472         if (!retinfo)
2473                 return -EFAULT;
2474
2475         cwait = edge_port->port->port.closing_wait;
2476         if (cwait != ASYNC_CLOSING_WAIT_NONE)
2477                 cwait = jiffies_to_msecs(cwait) / 10;
2478
2479         memset(&tmp, 0, sizeof(tmp));
2480
2481         tmp.type                = PORT_16550A;
2482         tmp.line                = edge_port->port->minor;
2483         tmp.port                = edge_port->port->port_number;
2484         tmp.irq                 = 0;
2485         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2486         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2487         tmp.baud_base           = 9600;
2488         tmp.close_delay         = 5*HZ;
2489         tmp.closing_wait        = cwait;
2490
2491         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2492                 return -EFAULT;
2493         return 0;
2494 }
2495
2496 static int edge_ioctl(struct tty_struct *tty,
2497                                         unsigned int cmd, unsigned long arg)
2498 {
2499         struct usb_serial_port *port = tty->driver_data;
2500         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2501
2502         switch (cmd) {
2503         case TIOCGSERIAL:
2504                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
2505                 return get_serial_info(edge_port,
2506                                 (struct serial_struct __user *) arg);
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         if (break_state == -1)
2519                 bv = 1; /* On */
2520         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2521         if (status)
2522                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2523                         __func__, status);
2524 }
2525
2526 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
2527 {
2528         if (!edge_serial->use_heartbeat)
2529                 return;
2530
2531         schedule_delayed_work(&edge_serial->heartbeat_work,
2532                         FW_HEARTBEAT_SECS * HZ);
2533 }
2534
2535 static void edge_heartbeat_work(struct work_struct *work)
2536 {
2537         struct edgeport_serial *serial;
2538         struct ti_i2c_desc *rom_desc;
2539
2540         serial = container_of(work, struct edgeport_serial,
2541                         heartbeat_work.work);
2542
2543         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
2544
2545         /* Descriptor address request is enough to reset the firmware timer */
2546         if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
2547                         rom_desc)) {
2548                 dev_err(&serial->serial->interface->dev,
2549                                 "%s - Incomplete heartbeat\n", __func__);
2550         }
2551         kfree(rom_desc);
2552
2553         edge_heartbeat_schedule(serial);
2554 }
2555
2556 static int edge_startup(struct usb_serial *serial)
2557 {
2558         struct edgeport_serial *edge_serial;
2559         int status;
2560         u16 product_id;
2561
2562         /* Make sure we have the required endpoints when in download mode. */
2563         if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) {
2564                 if (serial->num_bulk_in < serial->num_ports ||
2565                                 serial->num_bulk_out < serial->num_ports)
2566                         return -ENODEV;
2567         }
2568
2569         /* create our private serial structure */
2570         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2571         if (!edge_serial)
2572                 return -ENOMEM;
2573
2574         mutex_init(&edge_serial->es_lock);
2575         edge_serial->serial = serial;
2576         INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
2577         usb_set_serial_data(serial, edge_serial);
2578
2579         status = download_fw(edge_serial);
2580         if (status < 0) {
2581                 kfree(edge_serial);
2582                 return status;
2583         }
2584
2585         if (status > 0)
2586                 return 1;       /* bind but do not register any ports */
2587
2588         product_id = le16_to_cpu(
2589                         edge_serial->serial->dev->descriptor.idProduct);
2590
2591         /* Currently only the EP/416 models require heartbeat support */
2592         if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
2593                 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
2594                         product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
2595                         edge_serial->use_heartbeat = true;
2596                 }
2597         }
2598
2599         edge_heartbeat_schedule(edge_serial);
2600
2601         return 0;
2602 }
2603
2604 static void edge_disconnect(struct usb_serial *serial)
2605 {
2606         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2607
2608         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2609 }
2610
2611 static void edge_release(struct usb_serial *serial)
2612 {
2613         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2614
2615         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2616         kfree(edge_serial);
2617 }
2618
2619 static int edge_port_probe(struct usb_serial_port *port)
2620 {
2621         struct edgeport_port *edge_port;
2622         int ret;
2623
2624         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2625         if (!edge_port)
2626                 return -ENOMEM;
2627
2628         spin_lock_init(&edge_port->ep_lock);
2629         edge_port->port = port;
2630         edge_port->edge_serial = usb_get_serial_data(port->serial);
2631         edge_port->bUartMode = default_uart_mode;
2632
2633         switch (port->port_number) {
2634         case 0:
2635                 edge_port->uart_base = UMPMEM_BASE_UART1;
2636                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2637                 break;
2638         case 1:
2639                 edge_port->uart_base = UMPMEM_BASE_UART2;
2640                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2641                 break;
2642         default:
2643                 dev_err(&port->dev, "unknown port number\n");
2644                 ret = -ENODEV;
2645                 goto err;
2646         }
2647
2648         dev_dbg(&port->dev,
2649                 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2650                 __func__, port->port_number, edge_port->uart_base,
2651                 edge_port->dma_address);
2652
2653         usb_set_serial_port_data(port, edge_port);
2654
2655         ret = edge_create_sysfs_attrs(port);
2656         if (ret)
2657                 goto err;
2658
2659         port->port.closing_wait = msecs_to_jiffies(closing_wait * 10);
2660         port->port.drain_delay = 1;
2661
2662         return 0;
2663 err:
2664         kfree(edge_port);
2665
2666         return ret;
2667 }
2668
2669 static int edge_port_remove(struct usb_serial_port *port)
2670 {
2671         struct edgeport_port *edge_port;
2672
2673         edge_port = usb_get_serial_port_data(port);
2674         edge_remove_sysfs_attrs(port);
2675         kfree(edge_port);
2676
2677         return 0;
2678 }
2679
2680 /* Sysfs Attributes */
2681
2682 static ssize_t uart_mode_show(struct device *dev,
2683         struct device_attribute *attr, char *buf)
2684 {
2685         struct usb_serial_port *port = to_usb_serial_port(dev);
2686         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2687
2688         return sprintf(buf, "%d\n", edge_port->bUartMode);
2689 }
2690
2691 static ssize_t uart_mode_store(struct device *dev,
2692         struct device_attribute *attr, const char *valbuf, size_t count)
2693 {
2694         struct usb_serial_port *port = to_usb_serial_port(dev);
2695         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2696         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2697
2698         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2699
2700         if (v < 256)
2701                 edge_port->bUartMode = v;
2702         else
2703                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2704
2705         return count;
2706 }
2707 static DEVICE_ATTR_RW(uart_mode);
2708
2709 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2710 {
2711         return device_create_file(&port->dev, &dev_attr_uart_mode);
2712 }
2713
2714 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2715 {
2716         device_remove_file(&port->dev, &dev_attr_uart_mode);
2717         return 0;
2718 }
2719
2720 #ifdef CONFIG_PM
2721 static int edge_suspend(struct usb_serial *serial, pm_message_t message)
2722 {
2723         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2724
2725         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2726
2727         return 0;
2728 }
2729
2730 static int edge_resume(struct usb_serial *serial)
2731 {
2732         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2733
2734         edge_heartbeat_schedule(edge_serial);
2735
2736         return 0;
2737 }
2738 #endif
2739
2740 static struct usb_serial_driver edgeport_1port_device = {
2741         .driver = {
2742                 .owner          = THIS_MODULE,
2743                 .name           = "edgeport_ti_1",
2744         },
2745         .description            = "Edgeport TI 1 port adapter",
2746         .id_table               = edgeport_1port_id_table,
2747         .num_ports              = 1,
2748         .open                   = edge_open,
2749         .close                  = edge_close,
2750         .throttle               = edge_throttle,
2751         .unthrottle             = edge_unthrottle,
2752         .attach                 = edge_startup,
2753         .disconnect             = edge_disconnect,
2754         .release                = edge_release,
2755         .port_probe             = edge_port_probe,
2756         .port_remove            = edge_port_remove,
2757         .ioctl                  = edge_ioctl,
2758         .set_termios            = edge_set_termios,
2759         .tiocmget               = edge_tiocmget,
2760         .tiocmset               = edge_tiocmset,
2761         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2762         .get_icount             = usb_serial_generic_get_icount,
2763         .write                  = edge_write,
2764         .write_room             = edge_write_room,
2765         .chars_in_buffer        = edge_chars_in_buffer,
2766         .tx_empty               = edge_tx_empty,
2767         .break_ctl              = edge_break,
2768         .read_int_callback      = edge_interrupt_callback,
2769         .read_bulk_callback     = edge_bulk_in_callback,
2770         .write_bulk_callback    = edge_bulk_out_callback,
2771 #ifdef CONFIG_PM
2772         .suspend                = edge_suspend,
2773         .resume                 = edge_resume,
2774 #endif
2775 };
2776
2777 static struct usb_serial_driver edgeport_2port_device = {
2778         .driver = {
2779                 .owner          = THIS_MODULE,
2780                 .name           = "edgeport_ti_2",
2781         },
2782         .description            = "Edgeport TI 2 port adapter",
2783         .id_table               = edgeport_2port_id_table,
2784         .num_ports              = 2,
2785         .open                   = edge_open,
2786         .close                  = edge_close,
2787         .throttle               = edge_throttle,
2788         .unthrottle             = edge_unthrottle,
2789         .attach                 = edge_startup,
2790         .disconnect             = edge_disconnect,
2791         .release                = edge_release,
2792         .port_probe             = edge_port_probe,
2793         .port_remove            = edge_port_remove,
2794         .ioctl                  = edge_ioctl,
2795         .set_termios            = edge_set_termios,
2796         .tiocmget               = edge_tiocmget,
2797         .tiocmset               = edge_tiocmset,
2798         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2799         .get_icount             = usb_serial_generic_get_icount,
2800         .write                  = edge_write,
2801         .write_room             = edge_write_room,
2802         .chars_in_buffer        = edge_chars_in_buffer,
2803         .tx_empty               = edge_tx_empty,
2804         .break_ctl              = edge_break,
2805         .read_int_callback      = edge_interrupt_callback,
2806         .read_bulk_callback     = edge_bulk_in_callback,
2807         .write_bulk_callback    = edge_bulk_out_callback,
2808 #ifdef CONFIG_PM
2809         .suspend                = edge_suspend,
2810         .resume                 = edge_resume,
2811 #endif
2812 };
2813
2814 static struct usb_serial_driver * const serial_drivers[] = {
2815         &edgeport_1port_device, &edgeport_2port_device, NULL
2816 };
2817
2818 module_usb_serial_driver(serial_drivers, id_table_combined);
2819
2820 MODULE_AUTHOR(DRIVER_AUTHOR);
2821 MODULE_DESCRIPTION(DRIVER_DESC);
2822 MODULE_LICENSE("GPL");
2823 /*(DEBLOBBED)*/
2824
2825 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
2826 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
2827
2828 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
2829 MODULE_PARM_DESC(ignore_cpu_rev,
2830                         "Ignore the cpu revision when connecting to a device");
2831
2832 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
2833 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");