drivers/usb/serial/io_ti.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Edgeport USB Serial Converter driver
   4  *
   5  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
   6  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   7  *
   8  * Supports the following devices:
   9  *      EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
  10  *
  11  * For questions or problems with this driver, contact Inside Out
  12  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  13  * or Al Borchers <alborchers@steinerpoint.com>.
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/jiffies.h>
  18 #include <linux/errno.h>
  19 #include <linux/slab.h>
  20 #include <linux/tty.h>
  21 #include <linux/tty_driver.h>
  22 #include <linux/tty_flip.h>
  23 #include <linux/module.h>
  24 #include <linux/spinlock.h>
  25 #include <linux/mutex.h>
  26 #include <linux/serial.h>
  27 #include <linux/swab.h>
  28 #include <linux/kfifo.h>
  29 #include <linux/ioctl.h>
  30 #include <linux/firmware.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/usb.h>
  33 #include <linux/usb/serial.h>
  34
  35 #include "io_16654.h"
  36 #include "io_usbvend.h"
  37 #include "io_ti.h"
  38
  39 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  40 #define DRIVER_DESC "Edgeport USB Serial Driver"
  41
  42 #define EPROM_PAGE_SIZE         64
  43
  44
  45 /* different hardware types */
  46 #define HARDWARE_TYPE_930       0
  47 #define HARDWARE_TYPE_TIUMP     1
  48
  49 /* IOCTL_PRIVATE_TI_GET_MODE Definitions */
  50 #define TI_MODE_CONFIGURING     0   /* Device has not entered start device */
  51 #define TI_MODE_BOOT            1   /* Staying in boot mode                */
  52 #define TI_MODE_DOWNLOAD        2   /* Made it to download mode            */
  53 #define TI_MODE_TRANSITIONING   3   /*
  54                                      * Currently in boot mode but
  55                                      * transitioning to download mode
  56                                      */
  57
  58 /* read urb state */
  59 #define EDGE_READ_URB_RUNNING   0
  60 #define EDGE_READ_URB_STOPPING  1
  61 #define EDGE_READ_URB_STOPPED   2
  62
  63
  64 /* Product information read from the Edgeport */
  65 struct product_info {
  66         int     TiMode;                 /* Current TI Mode  */
  67         u8      hardware_type;          /* Type of hardware */
  68 } __packed;
  69
  70 /*
  71  * Edgeport firmware header
  72  *
  73  * "build_number" has been set to 0 in all three of the images I have
  74  * seen, and Digi Tech Support suggests that it is safe to ignore it.
  75  *
  76  * "length" is the number of bytes of actual data following the header.
  77  *
  78  * "checksum" is the low order byte resulting from adding the values of
  79  * all the data bytes.
  80  */
  81 struct edgeport_fw_hdr {
  82         u8 major_version;
  83         u8 minor_version;
  84         __le16 build_number;
  85         __le16 length;
  86         u8 checksum;
  87 } __packed;
  88
  89 struct edgeport_port {
  90         u16 uart_base;
  91         u16 dma_address;
  92         u8 shadow_msr;
  93         u8 shadow_mcr;
  94         u8 shadow_lsr;
  95         u8 lsr_mask;
  96         u32 ump_read_timeout;           /*
  97                                          * Number of milliseconds the UMP will
  98                                          * wait without data before completing
  99                                          * a read short
 100                                          */
 101         int baud_rate;
 102         int close_pending;
 103         int lsr_event;
 104
 105         struct edgeport_serial  *edge_serial;
 106         struct usb_serial_port  *port;
 107         u8 bUartMode;           /* Port type, 0: RS232, etc. */
 108         spinlock_t ep_lock;
 109         int ep_read_urb_state;
 110         int ep_write_urb_in_use;
 111 };
 112
 113 struct edgeport_serial {
 114         struct product_info product_info;
 115         u8 TI_I2C_Type;                 /* Type of I2C in UMP */
 116         u8 TiReadI2C;                   /*
 117                                          * Set to TRUE if we have read the
 118                                          * I2c in Boot Mode
 119                                          */
 120         struct mutex es_lock;
 121         int num_ports_open;
 122         struct usb_serial *serial;
 123         struct delayed_work heartbeat_work;
 124         int fw_version;
 125         bool use_heartbeat;
 126 };
 127
 128
 129 /* Devices that this driver supports */
 130 static const struct usb_device_id edgeport_1port_id_table[] = {
 131         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 132         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 133         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 134         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 135         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 136         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 137         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 138         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 139         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 140         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 141         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 142         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 143         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 147         { }
 148 };
 149
 150 static const struct usb_device_id edgeport_2port_id_table[] = {
 151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 154         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 155         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 156         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 160         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 161         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 162         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 163         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) },
 170         { }
 171 };
 172
 173 /* Devices that this driver supports */
 174 static const struct usb_device_id id_table_combined[] = {
 175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 176         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 177         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 178         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 179         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 182         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 183         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 184         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 185         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 186         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_E5805A) },
 209         { }
 210 };
 211
 212 MODULE_DEVICE_TABLE(usb, id_table_combined);
 213
 214 static bool ignore_cpu_rev;
 215 static int default_uart_mode;           /* RS232 */
 216
 217 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
 218                 int length);
 219
 220 static void stop_read(struct edgeport_port *edge_port);
 221 static int restart_read(struct edgeport_port *edge_port);
 222
 223 static void edge_set_termios(struct tty_struct *tty,
 224                 struct usb_serial_port *port, struct ktermios *old_termios);
 225 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
 226
 227 static int do_download_mode(struct edgeport_serial *serial,
 228                 const struct firmware *fw);
 229 static int do_boot_mode(struct edgeport_serial *serial,
 230                 const struct firmware *fw);
 231
 232 /* sysfs attributes */
 233 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 234 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 235
 236 /*
 237  * Some release of Edgeport firmware "down3.bin" after version 4.80
 238  * introduced code to automatically disconnect idle devices on some
 239  * Edgeport models after periods of inactivity, typically ~60 seconds.
 240  * This occurs without regard to whether ports on the device are open
 241  * or not.  Digi International Tech Support suggested:
 242  *
 243  * 1.  Adding driver "heartbeat" code to reset the firmware timer by
 244  *     requesting a descriptor record every 15 seconds, which should be
 245  *     effective with newer firmware versions that require it, and benign
 246  *     with older versions that do not. In practice 40 seconds seems often
 247  *     enough.
 248  * 2.  The heartbeat code is currently required only on Edgeport/416 models.
 249  */
 250 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
 251 #define FW_HEARTBEAT_SECS 40
 252
 253 /* Timeouts in msecs: firmware downloads take longer */
 254 #define TI_VSEND_TIMEOUT_DEFAULT 1000
 255 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
 256
 257 static int ti_vread_sync(struct usb_device *dev, u8 request, u16 value,
 258                 u16 index, void *data, int size)
 259 {
 260         int status;
 261
 262         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 263                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
 264                         value, index, data, size, 1000);
 265         if (status < 0)
 266                 return status;
 267         if (status != size) {
 268                 dev_dbg(&dev->dev, "%s - wanted to read %d, but only read %d\n",
 269                         __func__, size, status);
 270                 return -ECOMM;
 271         }
 272         return 0;
 273 }
 274
 275 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
 276                 u16 index, void *data, int size, int timeout)
 277 {
 278         int status;
 279
 280         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 281                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 282                         value, index, data, size, timeout);
 283         if (status < 0)
 284                 return status;
 285
 286         return 0;
 287 }
 288
 289 static int read_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
 290                 void *data, int size)
 291 {
 292         return ti_vread_sync(port->serial->dev, command, value,
 293                         UMPM_UART1_PORT + port->port_number,
 294                         data, size);
 295 }
 296
 297 static int send_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
 298                 void *data, int size)
 299 {
 300         return ti_vsend_sync(port->serial->dev, command, value,
 301                         UMPM_UART1_PORT + port->port_number,
 302                         data, size, TI_VSEND_TIMEOUT_DEFAULT);
 303 }
 304
 305 /* clear tx/rx buffers and fifo in TI UMP */
 306 static int purge_port(struct usb_serial_port *port, u16 mask)
 307 {
 308         int port_number = port->port_number;
 309
 310         dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
 311
 312         return send_port_cmd(port, UMPC_PURGE_PORT, mask, NULL, 0);
 313 }
 314
 315 /**
 316  * read_download_mem - Read edgeport memory from TI chip
 317  * @dev: usb device pointer
 318  * @start_address: Device CPU address at which to read
 319  * @length: Length of above data
 320  * @address_type: Can read both XDATA and I2C
 321  * @buffer: pointer to input data buffer
 322  */
 323 static int read_download_mem(struct usb_device *dev, int start_address,
 324                                 int length, u8 address_type, u8 *buffer)
 325 {
 326         int status = 0;
 327         u8 read_length;
 328         u16 be_start_address;
 329
 330         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
 331
 332         /*
 333          * Read in blocks of 64 bytes
 334          * (TI firmware can't handle more than 64 byte reads)
 335          */
 336         while (length) {
 337                 if (length > 64)
 338                         read_length = 64;
 339                 else
 340                         read_length = (u8)length;
 341
 342                 if (read_length > 1) {
 343                         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
 344                 }
 345                 /*
 346                  * NOTE: Must use swab as wIndex is sent in little-endian
 347                  *       byte order regardless of host byte order.
 348                  */
 349                 be_start_address = swab16((u16)start_address);
 350                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
 351                                         (u16)address_type,
 352                                         be_start_address,
 353                                         buffer, read_length);
 354
 355                 if (status) {
 356                         dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
 357                         return status;
 358                 }
 359
 360                 if (read_length > 1)
 361                         usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
 362
 363                 /* Update pointers/length */
 364                 start_address += read_length;
 365                 buffer += read_length;
 366                 length -= read_length;
 367         }
 368
 369         return status;
 370 }
 371
 372 static int read_ram(struct usb_device *dev, int start_address,
 373                                                 int length, u8 *buffer)
 374 {
 375         return read_download_mem(dev, start_address, length,
 376                                         DTK_ADDR_SPACE_XDATA, buffer);
 377 }
 378
 379 /* Read edgeport memory to a given block */
 380 static int read_boot_mem(struct edgeport_serial *serial,
 381                                 int start_address, int length, u8 *buffer)
 382 {
 383         int status = 0;
 384         int i;
 385
 386         for (i = 0; i < length; i++) {
 387                 status = ti_vread_sync(serial->serial->dev,
 388                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
 389                                 (u16)(start_address+i), &buffer[i], 0x01);
 390                 if (status) {
 391                         dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
 392                         return status;
 393                 }
 394         }
 395
 396         dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
 397                 __func__, start_address, length);
 398         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 399
 400         serial->TiReadI2C = 1;
 401
 402         return status;
 403 }
 404
 405 /* Write given block to TI EPROM memory */
 406 static int write_boot_mem(struct edgeport_serial *serial,
 407                                 int start_address, int length, u8 *buffer)
 408 {
 409         int status = 0;
 410         int i;
 411         u8 *temp;
 412
 413         /* Must do a read before write */
 414         if (!serial->TiReadI2C) {
 415                 temp = kmalloc(1, GFP_KERNEL);
 416                 if (!temp)
 417                         return -ENOMEM;
 418
 419                 status = read_boot_mem(serial, 0, 1, temp);
 420                 kfree(temp);
 421                 if (status)
 422                         return status;
 423         }
 424
 425         for (i = 0; i < length; ++i) {
 426                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 427                                 buffer[i], (u16)(i + start_address), NULL,
 428                                 0, TI_VSEND_TIMEOUT_DEFAULT);
 429                 if (status)
 430                         return status;
 431         }
 432
 433         dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
 434         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 435
 436         return status;
 437 }
 438
 439 /* Write edgeport I2C memory to TI chip */
 440 static int write_i2c_mem(struct edgeport_serial *serial,
 441                 int start_address, int length, u8 address_type, u8 *buffer)
 442 {
 443         struct device *dev = &serial->serial->dev->dev;
 444         int status = 0;
 445         int write_length;
 446         u16 be_start_address;
 447
 448         /* We can only send a maximum of 1 aligned byte page at a time */
 449
 450         /* calculate the number of bytes left in the first page */
 451         write_length = EPROM_PAGE_SIZE -
 452                                 (start_address & (EPROM_PAGE_SIZE - 1));
 453
 454         if (write_length > length)
 455                 write_length = length;
 456
 457         dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
 458                 __func__, start_address, write_length);
 459         usb_serial_debug_data(dev, __func__, write_length, buffer);
 460
 461         /*
 462          * Write first page.
 463          *
 464          * NOTE: Must use swab as wIndex is sent in little-endian byte order
 465          *       regardless of host byte order.
 466          */
 467         be_start_address = swab16((u16)start_address);
 468         status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 469                                 (u16)address_type, be_start_address,
 470                                 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
 471         if (status) {
 472                 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
 473                 return status;
 474         }
 475
 476         length          -= write_length;
 477         start_address   += write_length;
 478         buffer          += write_length;
 479
 480         /*
 481          * We should be aligned now -- can write max page size bytes at a
 482          * time.
 483          */
 484         while (length) {
 485                 if (length > EPROM_PAGE_SIZE)
 486                         write_length = EPROM_PAGE_SIZE;
 487                 else
 488                         write_length = length;
 489
 490                 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
 491                         __func__, start_address, write_length);
 492                 usb_serial_debug_data(dev, __func__, write_length, buffer);
 493
 494                 /*
 495                  * Write next page.
 496                  *
 497                  * NOTE: Must use swab as wIndex is sent in little-endian byte
 498                  *       order regardless of host byte order.
 499                  */
 500                 be_start_address = swab16((u16)start_address);
 501                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 502                                 (u16)address_type, be_start_address, buffer,
 503                                 write_length, TI_VSEND_TIMEOUT_DEFAULT);
 504                 if (status) {
 505                         dev_err(dev, "%s - ERROR %d\n", __func__, status);
 506                         return status;
 507                 }
 508
 509                 length          -= write_length;
 510                 start_address   += write_length;
 511                 buffer          += write_length;
 512         }
 513         return status;
 514 }
 515
 516 /*
 517  * Examine the UMP DMA registers and LSR
 518  *
 519  * Check the MSBit of the X and Y DMA byte count registers.
 520  * A zero in this bit indicates that the TX DMA buffers are empty
 521  * then check the TX Empty bit in the UART.
 522  */
 523 static int tx_active(struct edgeport_port *port)
 524 {
 525         int status;
 526         struct out_endpoint_desc_block *oedb;
 527         u8 *lsr;
 528         int bytes_left = 0;
 529
 530         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
 531         if (!oedb)
 532                 return -ENOMEM;
 533
 534         /*
 535          * Sigh, that's right, just one byte, as not all platforms can
 536          * do DMA from stack
 537          */
 538         lsr = kmalloc(1, GFP_KERNEL);
 539         if (!lsr) {
 540                 kfree(oedb);
 541                 return -ENOMEM;
 542         }
 543         /* Read the DMA Count Registers */
 544         status = read_ram(port->port->serial->dev, port->dma_address,
 545                                                 sizeof(*oedb), (void *)oedb);
 546         if (status)
 547                 goto exit_is_tx_active;
 548
 549         dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
 550
 551         /* and the LSR */
 552         status = read_ram(port->port->serial->dev,
 553                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
 554
 555         if (status)
 556                 goto exit_is_tx_active;
 557         dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
 558
 559         /* If either buffer has data or we are transmitting then return TRUE */
 560         if ((oedb->XByteCount & 0x80) != 0)
 561                 bytes_left += 64;
 562
 563         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
 564                 bytes_left += 1;
 565
 566         /* We return Not Active if we get any kind of error */
 567 exit_is_tx_active:
 568         dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
 569
 570         kfree(lsr);
 571         kfree(oedb);
 572         return bytes_left;
 573 }
 574
 575 static int choose_config(struct usb_device *dev)
 576 {
 577         /*
 578          * There may be multiple configurations on this device, in which case
 579          * we would need to read and parse all of them to find out which one
 580          * we want. However, we just support one config at this point,
 581          * configuration # 1, which is Config Descriptor 0.
 582          */
 583
 584         dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
 585                 __func__, dev->config->desc.bNumInterfaces);
 586         dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
 587                 __func__, dev->config->desc.bMaxPower * 2);
 588
 589         if (dev->config->desc.bNumInterfaces != 1) {
 590                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
 591                 return -ENODEV;
 592         }
 593
 594         return 0;
 595 }
 596
 597 static int read_rom(struct edgeport_serial *serial,
 598                                 int start_address, int length, u8 *buffer)
 599 {
 600         int status;
 601
 602         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 603                 status = read_download_mem(serial->serial->dev,
 604                                                start_address,
 605                                                length,
 606                                                serial->TI_I2C_Type,
 607                                                buffer);
 608         } else {
 609                 status = read_boot_mem(serial, start_address, length,
 610                                                                 buffer);
 611         }
 612         return status;
 613 }
 614
 615 static int write_rom(struct edgeport_serial *serial, int start_address,
 616                                                 int length, u8 *buffer)
 617 {
 618         if (serial->product_info.TiMode == TI_MODE_BOOT)
 619                 return write_boot_mem(serial, start_address, length,
 620                                                                 buffer);
 621
 622         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 623                 return write_i2c_mem(serial, start_address, length,
 624                                                 serial->TI_I2C_Type, buffer);
 625         return -EINVAL;
 626 }
 627
 628 /* Read a descriptor header from I2C based on type */
 629 static int get_descriptor_addr(struct edgeport_serial *serial,
 630                                 int desc_type, struct ti_i2c_desc *rom_desc)
 631 {
 632         int start_address;
 633         int status;
 634
 635         /* Search for requested descriptor in I2C */
 636         start_address = 2;
 637         do {
 638                 status = read_rom(serial,
 639                                    start_address,
 640                                    sizeof(struct ti_i2c_desc),
 641                                    (u8 *)rom_desc);
 642                 if (status)
 643                         return 0;
 644
 645                 if (rom_desc->Type == desc_type)
 646                         return start_address;
 647
 648                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 649                                                 le16_to_cpu(rom_desc->Size);
 650
 651         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 652
 653         return 0;
 654 }
 655
 656 /* Validate descriptor checksum */
 657 static int valid_csum(struct ti_i2c_desc *rom_desc, u8 *buffer)
 658 {
 659         u16 i;
 660         u8 cs = 0;
 661
 662         for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
 663                 cs = (u8)(cs + buffer[i]);
 664
 665         if (cs != rom_desc->CheckSum) {
 666                 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 667                 return -EINVAL;
 668         }
 669         return 0;
 670 }
 671
 672 /* Make sure that the I2C image is good */
 673 static int check_i2c_image(struct edgeport_serial *serial)
 674 {
 675         struct device *dev = &serial->serial->dev->dev;
 676         int status = 0;
 677         struct ti_i2c_desc *rom_desc;
 678         int start_address = 2;
 679         u8 *buffer;
 680         u16 ttype;
 681
 682         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 683         if (!rom_desc)
 684                 return -ENOMEM;
 685
 686         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 687         if (!buffer) {
 688                 kfree(rom_desc);
 689                 return -ENOMEM;
 690         }
 691
 692         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 693         status = read_rom(serial, 0, 1, buffer);
 694         if (status)
 695                 goto out;
 696
 697         if (*buffer != UMP5152 && *buffer != UMP3410) {
 698                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 699                 status = -ENODEV;
 700                 goto out;
 701         }
 702
 703         do {
 704                 /* Validate the I2C */
 705                 status = read_rom(serial,
 706                                 start_address,
 707                                 sizeof(struct ti_i2c_desc),
 708                                 (u8 *)rom_desc);
 709                 if (status)
 710                         break;
 711
 712                 if ((start_address + sizeof(struct ti_i2c_desc) +
 713                         le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
 714                         status = -ENODEV;
 715                         dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
 716                         break;
 717                 }
 718
 719                 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
 720
 721                 /* Skip type 2 record */
 722                 ttype = rom_desc->Type & 0x0f;
 723                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 724                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 725                         /* Read the descriptor data */
 726                         status = read_rom(serial, start_address +
 727                                                 sizeof(struct ti_i2c_desc),
 728                                                 le16_to_cpu(rom_desc->Size),
 729                                                 buffer);
 730                         if (status)
 731                                 break;
 732
 733                         status = valid_csum(rom_desc, buffer);
 734                         if (status)
 735                                 break;
 736                 }
 737                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 738                                                 le16_to_cpu(rom_desc->Size);
 739
 740         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 741                                 (start_address < TI_MAX_I2C_SIZE));
 742
 743         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 744                                 (start_address > TI_MAX_I2C_SIZE))
 745                 status = -ENODEV;
 746
 747 out:
 748         kfree(buffer);
 749         kfree(rom_desc);
 750         return status;
 751 }
 752
 753 static int get_manuf_info(struct edgeport_serial *serial, u8 *buffer)
 754 {
 755         int status;
 756         int start_address;
 757         struct ti_i2c_desc *rom_desc;
 758         struct edge_ti_manuf_descriptor *desc;
 759         struct device *dev = &serial->serial->dev->dev;
 760
 761         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 762         if (!rom_desc)
 763                 return -ENOMEM;
 764
 765         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 766                                                                 rom_desc);
 767
 768         if (!start_address) {
 769                 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
 770                 status = -ENODEV;
 771                 goto exit;
 772         }
 773
 774         /* Read the descriptor data */
 775         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 776                                         le16_to_cpu(rom_desc->Size), buffer);
 777         if (status)
 778                 goto exit;
 779
 780         status = valid_csum(rom_desc, buffer);
 781
 782         desc = (struct edge_ti_manuf_descriptor *)buffer;
 783         dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
 784         dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
 785         dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
 786         dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
 787         dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
 788         dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
 789
 790 exit:
 791         kfree(rom_desc);
 792         return status;
 793 }
 794
 795 /* Build firmware header used for firmware update */
 796 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
 797 {
 798         u8 *buffer;
 799         int buffer_size;
 800         int i;
 801         u8 cs = 0;
 802         struct ti_i2c_desc *i2c_header;
 803         struct ti_i2c_image_header *img_header;
 804         struct ti_i2c_firmware_rec *firmware_rec;
 805         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 806
 807         /*
 808          * In order to update the I2C firmware we must change the type 2 record
 809          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 810          * Then while in boot mode, the driver will download the latest
 811          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 812          * device comes back up in download mode the driver will cause the new
 813          * firmware to be copied from the UMP Ram to I2C and the firmware will
 814          * update the record type from 0xf2 to 0x02.
 815          */
 816
 817         /*
 818          * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
 819          * Record)
 820          */
 821         buffer_size = (((1024 * 16) - 512 ) +
 822                         sizeof(struct ti_i2c_firmware_rec));
 823
 824         buffer = kmalloc(buffer_size, GFP_KERNEL);
 825         if (!buffer)
 826                 return -ENOMEM;
 827
 828         /* Set entire image of 0xffs */
 829         memset(buffer, 0xff, buffer_size);
 830
 831         /* Copy version number into firmware record */
 832         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 833
 834         firmware_rec->Ver_Major = fw_hdr->major_version;
 835         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 836
 837         /* Pointer to fw_down memory image */
 838         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 839
 840         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 841                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 842                 le16_to_cpu(img_header->Length));
 843
 844         for (i=0; i < buffer_size; i++) {
 845                 cs = (u8)(cs + buffer[i]);
 846         }
 847
 848         kfree(buffer);
 849
 850         /* Build new header */
 851         i2c_header =  (struct ti_i2c_desc *)header;
 852         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 853
 854         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 855         i2c_header->Size        = cpu_to_le16(buffer_size);
 856         i2c_header->CheckSum    = cs;
 857         firmware_rec->Ver_Major = fw_hdr->major_version;
 858         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 859
 860         return 0;
 861 }
 862
 863 /* Try to figure out what type of I2c we have */
 864 static int i2c_type_bootmode(struct edgeport_serial *serial)
 865 {
 866         struct device *dev = &serial->serial->dev->dev;
 867         int status;
 868         u8 *data;
 869
 870         data = kmalloc(1, GFP_KERNEL);
 871         if (!data)
 872                 return -ENOMEM;
 873
 874         /* Try to read type 2 */
 875         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 876                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
 877         if (status)
 878                 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
 879         else
 880                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 881         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 882                 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
 883                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 884                 goto out;
 885         }
 886
 887         /* Try to read type 3 */
 888         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 889                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
 890         if (status)
 891                 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
 892         else
 893                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 894         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 895                 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
 896                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 897                 goto out;
 898         }
 899
 900         dev_dbg(dev, "%s - Unknown\n", __func__);
 901         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 902         status = -ENODEV;
 903 out:
 904         kfree(data);
 905         return status;
 906 }
 907
 908 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 909                                                 int length, int *num_sent)
 910 {
 911         int status;
 912
 913         status = usb_bulk_msg(serial->dev,
 914                         usb_sndbulkpipe(serial->dev,
 915                                 serial->port[0]->bulk_out_endpointAddress),
 916                         buffer, length, num_sent, 1000);
 917         return status;
 918 }
 919
 920 /* Download given firmware image to the device (IN BOOT MODE) */
 921 static int download_code(struct edgeport_serial *serial, u8 *image,
 922                                                         int image_length)
 923 {
 924         int status = 0;
 925         int pos;
 926         int transfer;
 927         int done;
 928
 929         /* Transfer firmware image */
 930         for (pos = 0; pos < image_length; ) {
 931                 /* Read the next buffer from file */
 932                 transfer = image_length - pos;
 933                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 934                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
 935
 936                 /* Transfer data */
 937                 status = bulk_xfer(serial->serial, &image[pos],
 938                                                         transfer, &done);
 939                 if (status)
 940                         break;
 941                 /* Advance buffer pointer */
 942                 pos += done;
 943         }
 944
 945         return status;
 946 }
 947
 948 /* FIXME!!! */
 949 static int config_boot_dev(struct usb_device *dev)
 950 {
 951         return 0;
 952 }
 953
 954 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
 955 {
 956         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
 957 }
 958
 959 static int check_fw_sanity(struct edgeport_serial *serial,
 960                 const struct firmware *fw)
 961 {
 962         u16 length_total;
 963         u8 checksum = 0;
 964         int pos;
 965         struct device *dev = &serial->serial->interface->dev;
 966         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 967
 968         if (fw->size < sizeof(struct edgeport_fw_hdr)) {
 969                 dev_err(dev, "incomplete fw header\n");
 970                 return -EINVAL;
 971         }
 972
 973         length_total = le16_to_cpu(fw_hdr->length) +
 974                         sizeof(struct edgeport_fw_hdr);
 975
 976         if (fw->size != length_total) {
 977                 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
 978                                 length_total, fw->size);
 979                 return -EINVAL;
 980         }
 981
 982         for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
 983                 checksum += fw->data[pos];
 984
 985         if (checksum != fw_hdr->checksum) {
 986                 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
 987                                 fw_hdr->checksum, checksum);
 988                 return -EINVAL;
 989         }
 990
 991         return 0;
 992 }
 993
 994 /*
 995  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
 996  *
 997  * This routine downloads the main operating code into the TI5052, using the
 998  * boot code already burned into E2PROM or ROM.
 999  */
1000 static int download_fw(struct edgeport_serial *serial)
1001 {
1002         struct device *dev = &serial->serial->interface->dev;
1003         int status = 0;
1004         struct usb_interface_descriptor *interface;
1005         const struct firmware *fw;
1006         const char *fw_name = "edgeport/down3.bin";
1007         struct edgeport_fw_hdr *fw_hdr;
1008
1009         status = request_firmware(&fw, fw_name, dev);
1010         if (status) {
1011                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1012                                 fw_name, status);
1013                 return status;
1014         }
1015
1016         if (check_fw_sanity(serial, fw)) {
1017                 status = -EINVAL;
1018                 goto out;
1019         }
1020
1021         fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1022
1023         /* If on-board version is newer, "fw_version" will be updated later. */
1024         serial->fw_version = (fw_hdr->major_version << 8) +
1025                         fw_hdr->minor_version;
1026
1027         /*
1028          * This routine is entered by both the BOOT mode and the Download mode
1029          * We can determine which code is running by the reading the config
1030          * descriptor and if we have only one bulk pipe it is in boot mode
1031          */
1032         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1033
1034         /* Default to type 2 i2c */
1035         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1036
1037         status = choose_config(serial->serial->dev);
1038         if (status)
1039                 goto out;
1040
1041         interface = &serial->serial->interface->cur_altsetting->desc;
1042         if (!interface) {
1043                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1044                 status = -ENODEV;
1045                 goto out;
1046         }
1047
1048         /*
1049          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1050          * if we have more than one endpoint we are definitely in download
1051          * mode
1052          */
1053         if (interface->bNumEndpoints > 1) {
1054                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1055                 status = do_download_mode(serial, fw);
1056         } else {
1057                 /* Otherwise we will remain in configuring mode */
1058                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1059                 status = do_boot_mode(serial, fw);
1060         }
1061
1062 out:
1063         release_firmware(fw);
1064         return status;
1065 }
1066
1067 static int do_download_mode(struct edgeport_serial *serial,
1068                 const struct firmware *fw)
1069 {
1070         struct device *dev = &serial->serial->interface->dev;
1071         int status = 0;
1072         int start_address;
1073         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1074         int download_cur_ver;
1075         int download_new_ver;
1076         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1077         struct ti_i2c_desc *rom_desc;
1078
1079         dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1080
1081         status = check_i2c_image(serial);
1082         if (status) {
1083                 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1084                 return status;
1085         }
1086
1087         /*
1088          * Validate Hardware version number
1089          * Read Manufacturing Descriptor from TI Based Edgeport
1090          */
1091         ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1092         if (!ti_manuf_desc)
1093                 return -ENOMEM;
1094
1095         status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
1096         if (status) {
1097                 kfree(ti_manuf_desc);
1098                 return status;
1099         }
1100
1101         /* Check version number of ION descriptor */
1102         if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1103                 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1104                         __func__, ti_cpu_rev(ti_manuf_desc));
1105                 kfree(ti_manuf_desc);
1106                 return -EINVAL;
1107         }
1108
1109         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1110         if (!rom_desc) {
1111                 kfree(ti_manuf_desc);
1112                 return -ENOMEM;
1113         }
1114
1115         /* Search for type 2 record (firmware record) */
1116         start_address = get_descriptor_addr(serial,
1117                         I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1118         if (start_address != 0) {
1119                 struct ti_i2c_firmware_rec *firmware_version;
1120                 u8 *record;
1121
1122                 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
1123                                 __func__);
1124
1125                 firmware_version = kmalloc(sizeof(*firmware_version),
1126                                                         GFP_KERNEL);
1127                 if (!firmware_version) {
1128                         kfree(rom_desc);
1129                         kfree(ti_manuf_desc);
1130                         return -ENOMEM;
1131                 }
1132
1133                 /*
1134                  * Validate version number
1135                  * Read the descriptor data
1136                  */
1137                 status = read_rom(serial, start_address +
1138                                 sizeof(struct ti_i2c_desc),
1139                                 sizeof(struct ti_i2c_firmware_rec),
1140                                 (u8 *)firmware_version);
1141                 if (status) {
1142                         kfree(firmware_version);
1143                         kfree(rom_desc);
1144                         kfree(ti_manuf_desc);
1145                         return status;
1146                 }
1147
1148                 /*
1149                  * Check version number of download with current
1150                  * version in I2c
1151                  */
1152                 download_cur_ver = (firmware_version->Ver_Major << 8) +
1153                                    (firmware_version->Ver_Minor);
1154                 download_new_ver = (fw_hdr->major_version << 8) +
1155                                    (fw_hdr->minor_version);
1156
1157                 dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1158                         __func__, firmware_version->Ver_Major,
1159                         firmware_version->Ver_Minor,
1160                         fw_hdr->major_version, fw_hdr->minor_version);
1161
1162                 /*
1163                  * Check if we have an old version in the I2C and
1164                  * update if necessary
1165                  */
1166                 if (download_cur_ver < download_new_ver) {
1167                         dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1168                                 __func__,
1169                                 firmware_version->Ver_Major,
1170                                 firmware_version->Ver_Minor,
1171                                 fw_hdr->major_version,
1172                                 fw_hdr->minor_version);
1173
1174                         record = kmalloc(1, GFP_KERNEL);
1175                         if (!record) {
1176                                 kfree(firmware_version);
1177                                 kfree(rom_desc);
1178                                 kfree(ti_manuf_desc);
1179                                 return -ENOMEM;
1180                         }
1181                         /*
1182                          * In order to update the I2C firmware we must
1183                          * change the type 2 record to type 0xF2. This
1184                          * will force the UMP to come up in Boot Mode.
1185                          * Then while in boot mode, the driver will
1186                          * download the latest firmware (padded to
1187                          * 15.5k) into the UMP ram. Finally when the
1188                          * device comes back up in download mode the
1189                          * driver will cause the new firmware to be
1190                          * copied from the UMP Ram to I2C and the
1191                          * firmware will update the record type from
1192                          * 0xf2 to 0x02.
1193                          */
1194                         *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1195
1196                         /*
1197                          * Change the I2C Firmware record type to
1198                          * 0xf2 to trigger an update
1199                          */
1200                         status = write_rom(serial, start_address,
1201                                         sizeof(*record), record);
1202                         if (status) {
1203                                 kfree(record);
1204                                 kfree(firmware_version);
1205                                 kfree(rom_desc);
1206                                 kfree(ti_manuf_desc);
1207                                 return status;
1208                         }
1209
1210                         /*
1211                          * verify the write -- must do this in order
1212                          * for write to complete before we do the
1213                          * hardware reset
1214                          */
1215                         status = read_rom(serial,
1216                                                 start_address,
1217                                                 sizeof(*record),
1218                                                 record);
1219                         if (status) {
1220                                 kfree(record);
1221                                 kfree(firmware_version);
1222                                 kfree(rom_desc);
1223                                 kfree(ti_manuf_desc);
1224                                 return status;
1225                         }
1226
1227                         if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1228                                 dev_err(dev, "%s - error resetting device\n",
1229                                                 __func__);
1230                                 kfree(record);
1231                                 kfree(firmware_version);
1232                                 kfree(rom_desc);
1233                                 kfree(ti_manuf_desc);
1234                                 return -ENODEV;
1235                         }
1236
1237                         dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1238
1239                         /* Reset UMP -- Back to BOOT MODE */
1240                         status = ti_vsend_sync(serial->serial->dev,
1241                                         UMPC_HARDWARE_RESET,
1242                                         0, 0, NULL, 0,
1243                                         TI_VSEND_TIMEOUT_DEFAULT);
1244
1245                         dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
1246                                         __func__, status);
1247
1248                         /* return an error on purpose. */
1249                         kfree(record);
1250                         kfree(firmware_version);
1251                         kfree(rom_desc);
1252                         kfree(ti_manuf_desc);
1253                         return -ENODEV;
1254                 }
1255                 /* Same or newer fw version is already loaded */
1256                 serial->fw_version = download_cur_ver;
1257                 kfree(firmware_version);
1258         }
1259         /* Search for type 0xF2 record (firmware blank record) */
1260         else {
1261                 start_address = get_descriptor_addr(serial,
1262                                 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
1263                 if (start_address != 0) {
1264 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1265                                 sizeof(struct ti_i2c_firmware_rec))
1266                         u8 *header;
1267                         u8 *vheader;
1268
1269                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1270                         if (!header) {
1271                                 kfree(rom_desc);
1272                                 kfree(ti_manuf_desc);
1273                                 return -ENOMEM;
1274                         }
1275
1276                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1277                         if (!vheader) {
1278                                 kfree(header);
1279                                 kfree(rom_desc);
1280                                 kfree(ti_manuf_desc);
1281                                 return -ENOMEM;
1282                         }
1283
1284                         dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
1285                                         __func__);
1286
1287                         /*
1288                          * In order to update the I2C firmware we must change
1289                          * the type 2 record to type 0xF2. This will force the
1290                          * UMP to come up in Boot Mode.  Then while in boot
1291                          * mode, the driver will download the latest firmware
1292                          * (padded to 15.5k) into the UMP ram. Finally when the
1293                          * device comes back up in download mode the driver
1294                          * will cause the new firmware to be copied from the
1295                          * UMP Ram to I2C and the firmware will update the
1296                          * record type from 0xf2 to 0x02.
1297                          */
1298                         status = build_i2c_fw_hdr(header, fw);
1299                         if (status) {
1300                                 kfree(vheader);
1301                                 kfree(header);
1302                                 kfree(rom_desc);
1303                                 kfree(ti_manuf_desc);
1304                                 return -EINVAL;
1305                         }
1306
1307                         /*
1308                          * Update I2C with type 0xf2 record with correct
1309                          * size and checksum
1310                          */
1311                         status = write_rom(serial,
1312                                                 start_address,
1313                                                 HEADER_SIZE,
1314                                                 header);
1315                         if (status) {
1316                                 kfree(vheader);
1317                                 kfree(header);
1318                                 kfree(rom_desc);
1319                                 kfree(ti_manuf_desc);
1320                                 return -EINVAL;
1321                         }
1322
1323                         /*
1324                          * verify the write -- must do this in order for
1325                          * write to complete before we do the hardware reset
1326                          */
1327                         status = read_rom(serial, start_address,
1328                                                         HEADER_SIZE, vheader);
1329
1330                         if (status) {
1331                                 dev_dbg(dev, "%s - can't read header back\n",
1332                                                 __func__);
1333                                 kfree(vheader);
1334                                 kfree(header);
1335                                 kfree(rom_desc);
1336                                 kfree(ti_manuf_desc);
1337                                 return status;
1338                         }
1339                         if (memcmp(vheader, header, HEADER_SIZE)) {
1340                                 dev_dbg(dev, "%s - write download record failed\n",
1341                                                 __func__);
1342                                 kfree(vheader);
1343                                 kfree(header);
1344                                 kfree(rom_desc);
1345                                 kfree(ti_manuf_desc);
1346                                 return -EINVAL;
1347                         }
1348
1349                         kfree(vheader);
1350                         kfree(header);
1351
1352                         dev_dbg(dev, "%s - Start firmware update\n", __func__);
1353
1354                         /* Tell firmware to copy download image into I2C */
1355                         status = ti_vsend_sync(serial->serial->dev,
1356                                         UMPC_COPY_DNLD_TO_I2C,
1357                                         0, 0, NULL, 0,
1358                                         TI_VSEND_TIMEOUT_FW_DOWNLOAD);
1359
1360                         dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
1361                                         status);
1362                         if (status) {
1363                                 dev_err(dev,
1364                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1365                                         __func__);
1366                                 kfree(rom_desc);
1367                                 kfree(ti_manuf_desc);
1368                                 return status;
1369                         }
1370                 }
1371         }
1372
1373         /* The device is running the download code */
1374         kfree(rom_desc);
1375         kfree(ti_manuf_desc);
1376         return 0;
1377 }
1378
1379 static int do_boot_mode(struct edgeport_serial *serial,
1380                 const struct firmware *fw)
1381 {
1382         struct device *dev = &serial->serial->interface->dev;
1383         int status = 0;
1384         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1385         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1386
1387         dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1388
1389         /* Configure the TI device so we can use the BULK pipes for download */
1390         status = config_boot_dev(serial->serial->dev);
1391         if (status)
1392                 return status;
1393
1394         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1395                                                         != USB_VENDOR_ID_ION) {
1396                 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1397                         le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1398                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1399                 goto stayinbootmode;
1400         }
1401
1402         /*
1403          * We have an ION device (I2c Must be programmed)
1404          * Determine I2C image type
1405          */
1406         if (i2c_type_bootmode(serial))
1407                 goto stayinbootmode;
1408
1409         /* Check for ION Vendor ID and that the I2C is valid */
1410         if (!check_i2c_image(serial)) {
1411                 struct ti_i2c_image_header *header;
1412                 int i;
1413                 u8 cs = 0;
1414                 u8 *buffer;
1415                 int buffer_size;
1416
1417                 /*
1418                  * Validate Hardware version number
1419                  * Read Manufacturing Descriptor from TI Based Edgeport
1420                  */
1421                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1422                 if (!ti_manuf_desc)
1423                         return -ENOMEM;
1424
1425                 status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
1426                 if (status) {
1427                         kfree(ti_manuf_desc);
1428                         goto stayinbootmode;
1429                 }
1430
1431                 /* Check for version 2 */
1432                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1433                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1434                                 __func__, ti_cpu_rev(ti_manuf_desc));
1435                         kfree(ti_manuf_desc);
1436                         goto stayinbootmode;
1437                 }
1438
1439                 kfree(ti_manuf_desc);
1440
1441                 /*
1442                  * In order to update the I2C firmware we must change the type
1443                  * 2 record to type 0xF2. This will force the UMP to come up
1444                  * in Boot Mode.  Then while in boot mode, the driver will
1445                  * download the latest firmware (padded to 15.5k) into the
1446                  * UMP ram. Finally when the device comes back up in download
1447                  * mode the driver will cause the new firmware to be copied
1448                  * from the UMP Ram to I2C and the firmware will update the
1449                  * record type from 0xf2 to 0x02.
1450                  *
1451                  * Do we really have to copy the whole firmware image,
1452                  * or could we do this in place!
1453                  */
1454
1455                 /* Allocate a 15.5k buffer + 3 byte header */
1456                 buffer_size = (((1024 * 16) - 512) +
1457                                         sizeof(struct ti_i2c_image_header));
1458                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1459                 if (!buffer)
1460                         return -ENOMEM;
1461
1462                 /* Initialize the buffer to 0xff (pad the buffer) */
1463                 memset(buffer, 0xff, buffer_size);
1464                 memcpy(buffer, &fw->data[4], fw->size - 4);
1465
1466                 for (i = sizeof(struct ti_i2c_image_header);
1467                                 i < buffer_size; i++) {
1468                         cs = (u8)(cs + buffer[i]);
1469                 }
1470
1471                 header = (struct ti_i2c_image_header *)buffer;
1472
1473                 /* update length and checksum after padding */
1474                 header->Length = cpu_to_le16((u16)(buffer_size -
1475                                         sizeof(struct ti_i2c_image_header)));
1476                 header->CheckSum = cs;
1477
1478                 /* Download the operational code  */
1479                 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
1480                                 __func__,
1481                                 fw_hdr->major_version, fw_hdr->minor_version);
1482                 status = download_code(serial, buffer, buffer_size);
1483
1484                 kfree(buffer);
1485
1486                 if (status) {
1487                         dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1488                         return status;
1489                 }
1490
1491                 /* Device will reboot */
1492                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1493
1494                 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1495
1496                 return 1;
1497         }
1498
1499 stayinbootmode:
1500         /* Eprom is invalid or blank stay in boot mode */
1501         dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1502         serial->product_info.TiMode = TI_MODE_BOOT;
1503
1504         return 1;
1505 }
1506
1507 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1508 {
1509         on = !!on;      /* 1 or 0 not bitmask */
1510
1511         return send_port_cmd(port->port, feature, on, NULL, 0);
1512 }
1513
1514 static int restore_mcr(struct edgeport_port *port, u8 mcr)
1515 {
1516         int status = 0;
1517
1518         dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1519
1520         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1521         if (status)
1522                 return status;
1523         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1524         if (status)
1525                 return status;
1526         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1527 }
1528
1529 /* Convert TI LSR to standard UART flags */
1530 static u8 map_line_status(u8 ti_lsr)
1531 {
1532         u8 lsr = 0;
1533
1534 #define MAP_FLAG(flagUmp, flagUart)    \
1535         if (ti_lsr & flagUmp) \
1536                 lsr |= flagUart;
1537
1538         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1539         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1540         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1541         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1542         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1543         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1544
1545 #undef MAP_FLAG
1546
1547         return lsr;
1548 }
1549
1550 static void handle_new_msr(struct edgeport_port *edge_port, u8 msr)
1551 {
1552         struct async_icount *icount;
1553         struct tty_struct *tty;
1554
1555         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1556
1557         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1558                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1559                 icount = &edge_port->port->icount;
1560
1561                 /* update input line counters */
1562                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1563                         icount->cts++;
1564                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1565                         icount->dsr++;
1566                 if (msr & EDGEPORT_MSR_DELTA_CD)
1567                         icount->dcd++;
1568                 if (msr & EDGEPORT_MSR_DELTA_RI)
1569                         icount->rng++;
1570                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1571         }
1572
1573         /* Save the new modem status */
1574         edge_port->shadow_msr = msr & 0xf0;
1575
1576         tty = tty_port_tty_get(&edge_port->port->port);
1577         /* handle CTS flow control */
1578         if (tty && C_CRTSCTS(tty)) {
1579                 if (msr & EDGEPORT_MSR_CTS)
1580                         tty_wakeup(tty);
1581         }
1582         tty_kref_put(tty);
1583 }
1584
1585 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1586                                                         u8 lsr, u8 data)
1587 {
1588         struct async_icount *icount;
1589         u8 new_lsr = (u8)(lsr & (u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1590                                                 LSR_FRM_ERR | LSR_BREAK));
1591
1592         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1593
1594         edge_port->shadow_lsr = lsr;
1595
1596         if (new_lsr & LSR_BREAK)
1597                 /*
1598                  * Parity and Framing errors only count if they
1599                  * occur exclusive of a break being received.
1600                  */
1601                 new_lsr &= (u8)(LSR_OVER_ERR | LSR_BREAK);
1602
1603         /* Place LSR data byte into Rx buffer */
1604         if (lsr_data)
1605                 edge_tty_recv(edge_port->port, &data, 1);
1606
1607         /* update input line counters */
1608         icount = &edge_port->port->icount;
1609         if (new_lsr & LSR_BREAK)
1610                 icount->brk++;
1611         if (new_lsr & LSR_OVER_ERR)
1612                 icount->overrun++;
1613         if (new_lsr & LSR_PAR_ERR)
1614                 icount->parity++;
1615         if (new_lsr & LSR_FRM_ERR)
1616                 icount->frame++;
1617 }
1618
1619 static void edge_interrupt_callback(struct urb *urb)
1620 {
1621         struct edgeport_serial *edge_serial = urb->context;
1622         struct usb_serial_port *port;
1623         struct edgeport_port *edge_port;
1624         struct device *dev;
1625         unsigned char *data = urb->transfer_buffer;
1626         int length = urb->actual_length;
1627         int port_number;
1628         int function;
1629         int retval;
1630         u8 lsr;
1631         u8 msr;
1632         int status = urb->status;
1633
1634         switch (status) {
1635         case 0:
1636                 /* success */
1637                 break;
1638         case -ECONNRESET:
1639         case -ENOENT:
1640         case -ESHUTDOWN:
1641                 /* this urb is terminated, clean up */
1642                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1643                     __func__, status);
1644                 return;
1645         default:
1646                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1647                         "%d\n", __func__, status);
1648                 goto exit;
1649         }
1650
1651         if (!length) {
1652                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1653                 goto exit;
1654         }
1655
1656         dev = &edge_serial->serial->dev->dev;
1657         usb_serial_debug_data(dev, __func__, length, data);
1658
1659         if (length != 2) {
1660                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1661                 goto exit;
1662         }
1663
1664         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1665         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1666         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1667                 port_number, function, data[1]);
1668
1669         if (port_number >= edge_serial->serial->num_ports) {
1670                 dev_err(dev, "bad port number %d\n", port_number);
1671                 goto exit;
1672         }
1673
1674         port = edge_serial->serial->port[port_number];
1675         edge_port = usb_get_serial_port_data(port);
1676         if (!edge_port) {
1677                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1678                 return;
1679         }
1680         switch (function) {
1681         case TIUMP_INTERRUPT_CODE_LSR:
1682                 lsr = map_line_status(data[1]);
1683                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1684                         /*
1685                          * Save the LSR event for bulk read completion routine
1686                          */
1687                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1688                                 __func__, port_number, lsr);
1689                         edge_port->lsr_event = 1;
1690                         edge_port->lsr_mask = lsr;
1691                 } else {
1692                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1693                                 __func__, port_number, lsr);
1694                         handle_new_lsr(edge_port, 0, lsr, 0);
1695                 }
1696                 break;
1697
1698         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1699                 /* Copy MSR from UMP */
1700                 msr = data[1];
1701                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1702                         __func__, port_number, msr);
1703                 handle_new_msr(edge_port, msr);
1704                 break;
1705
1706         default:
1707                 dev_err(&urb->dev->dev,
1708                         "%s - Unknown Interrupt code from UMP %x\n",
1709                         __func__, data[1]);
1710                 break;
1711
1712         }
1713
1714 exit:
1715         retval = usb_submit_urb(urb, GFP_ATOMIC);
1716         if (retval)
1717                 dev_err(&urb->dev->dev,
1718                         "%s - usb_submit_urb failed with result %d\n",
1719                          __func__, retval);
1720 }
1721
1722 static void edge_bulk_in_callback(struct urb *urb)
1723 {
1724         struct edgeport_port *edge_port = urb->context;
1725         struct device *dev = &edge_port->port->dev;
1726         unsigned char *data = urb->transfer_buffer;
1727         unsigned long flags;
1728         int retval = 0;
1729         int port_number;
1730         int status = urb->status;
1731
1732         switch (status) {
1733         case 0:
1734                 /* success */
1735                 break;
1736         case -ECONNRESET:
1737         case -ENOENT:
1738         case -ESHUTDOWN:
1739                 /* this urb is terminated, clean up */
1740                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1741                 return;
1742         default:
1743                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1744         }
1745
1746         if (status == -EPIPE)
1747                 goto exit;
1748
1749         if (status) {
1750                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1751                 return;
1752         }
1753
1754         port_number = edge_port->port->port_number;
1755
1756         if (urb->actual_length > 0 && edge_port->lsr_event) {
1757                 edge_port->lsr_event = 0;
1758                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1759                         __func__, port_number, edge_port->lsr_mask, *data);
1760                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1761                 /* Adjust buffer length/pointer */
1762                 --urb->actual_length;
1763                 ++data;
1764         }
1765
1766         if (urb->actual_length) {
1767                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1768                 if (edge_port->close_pending)
1769                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1770                                                                 __func__);
1771                 else
1772                         edge_tty_recv(edge_port->port, data,
1773                                         urb->actual_length);
1774                 edge_port->port->icount.rx += urb->actual_length;
1775         }
1776
1777 exit:
1778         /* continue read unless stopped */
1779         spin_lock_irqsave(&edge_port->ep_lock, flags);
1780         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1781                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1782         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1783                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1784
1785         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1786         if (retval)
1787                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1788 }
1789
1790 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1791                 int length)
1792 {
1793         int queued;
1794
1795         queued = tty_insert_flip_string(&port->port, data, length);
1796         if (queued < length)
1797                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1798                         __func__, length - queued);
1799         tty_flip_buffer_push(&port->port);
1800 }
1801
1802 static void edge_bulk_out_callback(struct urb *urb)
1803 {
1804         struct usb_serial_port *port = urb->context;
1805         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1806         int status = urb->status;
1807         struct tty_struct *tty;
1808
1809         edge_port->ep_write_urb_in_use = 0;
1810
1811         switch (status) {
1812         case 0:
1813                 /* success */
1814                 break;
1815         case -ECONNRESET:
1816         case -ENOENT:
1817         case -ESHUTDOWN:
1818                 /* this urb is terminated, clean up */
1819                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1820                     __func__, status);
1821                 return;
1822         default:
1823                 dev_err_console(port, "%s - nonzero write bulk status "
1824                         "received: %d\n", __func__, status);
1825         }
1826
1827         /* send any buffered data */
1828         tty = tty_port_tty_get(&port->port);
1829         edge_send(port, tty);
1830         tty_kref_put(tty);
1831 }
1832
1833 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1834 {
1835         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1836         struct edgeport_serial *edge_serial;
1837         struct usb_device *dev;
1838         struct urb *urb;
1839         int status;
1840         u16 open_settings;
1841         u8 transaction_timeout;
1842
1843         if (edge_port == NULL)
1844                 return -ENODEV;
1845
1846         dev = port->serial->dev;
1847
1848         /* turn off loopback */
1849         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1850         if (status) {
1851                 dev_err(&port->dev,
1852                                 "%s - cannot send clear loopback command, %d\n",
1853                         __func__, status);
1854                 return status;
1855         }
1856
1857         /* set up the port settings */
1858         if (tty)
1859                 edge_set_termios(tty, port, &tty->termios);
1860
1861         /* open up the port */
1862
1863         /* milliseconds to timeout for DMA transfer */
1864         transaction_timeout = 2;
1865
1866         edge_port->ump_read_timeout =
1867                                 max(20, ((transaction_timeout * 3) / 2));
1868
1869         /* milliseconds to timeout for DMA transfer */
1870         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1871                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1872                              (transaction_timeout << 2));
1873
1874         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1875
1876         /* Tell TI to open and start the port */
1877         status = send_port_cmd(port, UMPC_OPEN_PORT, open_settings, NULL, 0);
1878         if (status) {
1879                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1880                                                         __func__, status);
1881                 return status;
1882         }
1883
1884         /* Start the DMA? */
1885         status = send_port_cmd(port, UMPC_START_PORT, 0, NULL, 0);
1886         if (status) {
1887                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1888                                                         __func__, status);
1889                 return status;
1890         }
1891
1892         /* Clear TX and RX buffers in UMP */
1893         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1894         if (status) {
1895                 dev_err(&port->dev,
1896                         "%s - cannot send clear buffers command, %d\n",
1897                         __func__, status);
1898                 return status;
1899         }
1900
1901         /* Read Initial MSR */
1902         status = read_port_cmd(port, UMPC_READ_MSR, 0, &edge_port->shadow_msr, 1);
1903         if (status) {
1904                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1905                                                         __func__, status);
1906                 return status;
1907         }
1908
1909         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1910
1911         /* Set Initial MCR */
1912         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1913         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1914
1915         edge_serial = edge_port->edge_serial;
1916         if (mutex_lock_interruptible(&edge_serial->es_lock))
1917                 return -ERESTARTSYS;
1918         if (edge_serial->num_ports_open == 0) {
1919                 /* we are the first port to open, post the interrupt urb */
1920                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1921                 urb->context = edge_serial;
1922                 status = usb_submit_urb(urb, GFP_KERNEL);
1923                 if (status) {
1924                         dev_err(&port->dev,
1925                                 "%s - usb_submit_urb failed with value %d\n",
1926                                         __func__, status);
1927                         goto release_es_lock;
1928                 }
1929         }
1930
1931         /*
1932          * reset the data toggle on the bulk endpoints to work around bug in
1933          * host controllers where things get out of sync some times
1934          */
1935         usb_clear_halt(dev, port->write_urb->pipe);
1936         usb_clear_halt(dev, port->read_urb->pipe);
1937
1938         /* start up our bulk read urb */
1939         urb = port->read_urb;
1940         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1941         urb->context = edge_port;
1942         status = usb_submit_urb(urb, GFP_KERNEL);
1943         if (status) {
1944                 dev_err(&port->dev,
1945                         "%s - read bulk usb_submit_urb failed with value %d\n",
1946                                 __func__, status);
1947                 goto unlink_int_urb;
1948         }
1949
1950         ++edge_serial->num_ports_open;
1951
1952         goto release_es_lock;
1953
1954 unlink_int_urb:
1955         if (edge_port->edge_serial->num_ports_open == 0)
1956                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1957 release_es_lock:
1958         mutex_unlock(&edge_serial->es_lock);
1959         return status;
1960 }
1961
1962 static void edge_close(struct usb_serial_port *port)
1963 {
1964         struct edgeport_serial *edge_serial;
1965         struct edgeport_port *edge_port;
1966         unsigned long flags;
1967
1968         edge_serial = usb_get_serial_data(port->serial);
1969         edge_port = usb_get_serial_port_data(port);
1970         if (edge_serial == NULL || edge_port == NULL)
1971                 return;
1972
1973         /*
1974          * The bulkreadcompletion routine will check
1975          * this flag and dump add read data
1976          */
1977         edge_port->close_pending = 1;
1978
1979         usb_kill_urb(port->read_urb);
1980         usb_kill_urb(port->write_urb);
1981         edge_port->ep_write_urb_in_use = 0;
1982         spin_lock_irqsave(&edge_port->ep_lock, flags);
1983         kfifo_reset_out(&port->write_fifo);
1984         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1985
1986         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1987         send_port_cmd(port, UMPC_CLOSE_PORT, 0, NULL, 0);
1988
1989         mutex_lock(&edge_serial->es_lock);
1990         --edge_port->edge_serial->num_ports_open;
1991         if (edge_port->edge_serial->num_ports_open <= 0) {
1992                 /* last port is now closed, let's shut down our interrupt urb */
1993                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1994                 edge_port->edge_serial->num_ports_open = 0;
1995         }
1996         mutex_unlock(&edge_serial->es_lock);
1997         edge_port->close_pending = 0;
1998 }
1999
2000 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2001                                 const unsigned char *data, int count)
2002 {
2003         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2004
2005         if (count == 0) {
2006                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2007                 return 0;
2008         }
2009
2010         if (edge_port == NULL)
2011                 return -ENODEV;
2012         if (edge_port->close_pending == 1)
2013                 return -ENODEV;
2014
2015         count = kfifo_in_locked(&port->write_fifo, data, count,
2016                                                         &edge_port->ep_lock);
2017         edge_send(port, tty);
2018
2019         return count;
2020 }
2021
2022 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
2023 {
2024         int count, result;
2025         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2026         unsigned long flags;
2027
2028         spin_lock_irqsave(&edge_port->ep_lock, flags);
2029
2030         if (edge_port->ep_write_urb_in_use) {
2031                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2032                 return;
2033         }
2034
2035         count = kfifo_out(&port->write_fifo,
2036                                 port->write_urb->transfer_buffer,
2037                                 port->bulk_out_size);
2038
2039         if (count == 0) {
2040                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2041                 return;
2042         }
2043
2044         edge_port->ep_write_urb_in_use = 1;
2045
2046         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2047
2048         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2049
2050         /* set up our urb */
2051         port->write_urb->transfer_buffer_length = count;
2052
2053         /* send the data out the bulk port */
2054         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2055         if (result) {
2056                 dev_err_console(port,
2057                         "%s - failed submitting write urb, error %d\n",
2058                                 __func__, result);
2059                 edge_port->ep_write_urb_in_use = 0;
2060                 /* TODO: reschedule edge_send */
2061         } else
2062                 edge_port->port->icount.tx += count;
2063
2064         /*
2065          * wakeup any process waiting for writes to complete
2066          * there is now more room in the buffer for new writes
2067          */
2068         if (tty)
2069                 tty_wakeup(tty);
2070 }
2071
2072 static unsigned int edge_write_room(struct tty_struct *tty)
2073 {
2074         struct usb_serial_port *port = tty->driver_data;
2075         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2076         unsigned int room;
2077         unsigned long flags;
2078
2079         if (edge_port == NULL)
2080                 return 0;
2081         if (edge_port->close_pending == 1)
2082                 return 0;
2083
2084         spin_lock_irqsave(&edge_port->ep_lock, flags);
2085         room = kfifo_avail(&port->write_fifo);
2086         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2087
2088         dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
2089         return room;
2090 }
2091
2092 static unsigned int edge_chars_in_buffer(struct tty_struct *tty)
2093 {
2094         struct usb_serial_port *port = tty->driver_data;
2095         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2096         unsigned int chars;
2097         unsigned long flags;
2098         if (edge_port == NULL)
2099                 return 0;
2100
2101         spin_lock_irqsave(&edge_port->ep_lock, flags);
2102         chars = kfifo_len(&port->write_fifo);
2103         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2104
2105         dev_dbg(&port->dev, "%s - returns %u\n", __func__, chars);
2106         return chars;
2107 }
2108
2109 static bool edge_tx_empty(struct usb_serial_port *port)
2110 {
2111         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2112         int ret;
2113
2114         ret = tx_active(edge_port);
2115         if (ret > 0)
2116                 return false;
2117
2118         return true;
2119 }
2120
2121 static void edge_throttle(struct tty_struct *tty)
2122 {
2123         struct usb_serial_port *port = tty->driver_data;
2124         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2125         int status;
2126
2127         if (edge_port == NULL)
2128                 return;
2129
2130         /* if we are implementing XON/XOFF, send the stop character */
2131         if (I_IXOFF(tty)) {
2132                 unsigned char stop_char = STOP_CHAR(tty);
2133                 status = edge_write(tty, port, &stop_char, 1);
2134                 if (status <= 0) {
2135                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2136                 }
2137         }
2138
2139         /*
2140          * if we are implementing RTS/CTS, stop reads
2141          * and the Edgeport will clear the RTS line
2142          */
2143         if (C_CRTSCTS(tty))
2144                 stop_read(edge_port);
2145
2146 }
2147
2148 static void edge_unthrottle(struct tty_struct *tty)
2149 {
2150         struct usb_serial_port *port = tty->driver_data;
2151         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2152         int status;
2153
2154         if (edge_port == NULL)
2155                 return;
2156
2157         /* if we are implementing XON/XOFF, send the start character */
2158         if (I_IXOFF(tty)) {
2159                 unsigned char start_char = START_CHAR(tty);
2160                 status = edge_write(tty, port, &start_char, 1);
2161                 if (status <= 0) {
2162                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2163                 }
2164         }
2165         /*
2166          * if we are implementing RTS/CTS, restart reads
2167          * are the Edgeport will assert the RTS line
2168          */
2169         if (C_CRTSCTS(tty)) {
2170                 status = restart_read(edge_port);
2171                 if (status)
2172                         dev_err(&port->dev,
2173                                 "%s - read bulk usb_submit_urb failed: %d\n",
2174                                                         __func__, status);
2175         }
2176
2177 }
2178
2179 static void stop_read(struct edgeport_port *edge_port)
2180 {
2181         unsigned long flags;
2182
2183         spin_lock_irqsave(&edge_port->ep_lock, flags);
2184
2185         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2186                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2187         edge_port->shadow_mcr &= ~MCR_RTS;
2188
2189         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2190 }
2191
2192 static int restart_read(struct edgeport_port *edge_port)
2193 {
2194         struct urb *urb;
2195         int status = 0;
2196         unsigned long flags;
2197
2198         spin_lock_irqsave(&edge_port->ep_lock, flags);
2199
2200         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2201                 urb = edge_port->port->read_urb;
2202                 status = usb_submit_urb(urb, GFP_ATOMIC);
2203         }
2204         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2205         edge_port->shadow_mcr |= MCR_RTS;
2206
2207         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2208
2209         return status;
2210 }
2211
2212 static void change_port_settings(struct tty_struct *tty,
2213                 struct edgeport_port *edge_port, struct ktermios *old_termios)
2214 {
2215         struct device *dev = &edge_port->port->dev;
2216         struct ump_uart_config *config;
2217         int baud;
2218         unsigned cflag;
2219         int status;
2220
2221         config = kmalloc (sizeof (*config), GFP_KERNEL);
2222         if (!config) {
2223                 tty->termios = *old_termios;
2224                 return;
2225         }
2226
2227         cflag = tty->termios.c_cflag;
2228
2229         config->wFlags = 0;
2230
2231         /* These flags must be set */
2232         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2233         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2234         config->bUartMode = (u8)(edge_port->bUartMode);
2235
2236         switch (cflag & CSIZE) {
2237         case CS5:
2238                     config->bDataBits = UMP_UART_CHAR5BITS;
2239                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2240                     break;
2241         case CS6:
2242                     config->bDataBits = UMP_UART_CHAR6BITS;
2243                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2244                     break;
2245         case CS7:
2246                     config->bDataBits = UMP_UART_CHAR7BITS;
2247                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2248                     break;
2249         default:
2250         case CS8:
2251                     config->bDataBits = UMP_UART_CHAR8BITS;
2252                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2253                             break;
2254         }
2255
2256         if (cflag & PARENB) {
2257                 if (cflag & PARODD) {
2258                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2259                         config->bParity = UMP_UART_ODDPARITY;
2260                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2261                 } else {
2262                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2263                         config->bParity = UMP_UART_EVENPARITY;
2264                         dev_dbg(dev, "%s - parity = even\n", __func__);
2265                 }
2266         } else {
2267                 config->bParity = UMP_UART_NOPARITY;
2268                 dev_dbg(dev, "%s - parity = none\n", __func__);
2269         }
2270
2271         if (cflag & CSTOPB) {
2272                 config->bStopBits = UMP_UART_STOPBIT2;
2273                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2274         } else {
2275                 config->bStopBits = UMP_UART_STOPBIT1;
2276                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2277         }
2278
2279         /* figure out the flow control settings */
2280         if (cflag & CRTSCTS) {
2281                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2282                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2283                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2284         } else {
2285                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2286                 restart_read(edge_port);
2287         }
2288
2289         /*
2290          * if we are implementing XON/XOFF, set the start and stop
2291          * character in the device
2292          */
2293         config->cXon  = START_CHAR(tty);
2294         config->cXoff = STOP_CHAR(tty);
2295
2296         /* if we are implementing INBOUND XON/XOFF */
2297         if (I_IXOFF(tty)) {
2298                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2299                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2300                         __func__, config->cXon, config->cXoff);
2301         } else
2302                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2303
2304         /* if we are implementing OUTBOUND XON/XOFF */
2305         if (I_IXON(tty)) {
2306                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2307                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2308                         __func__, config->cXon, config->cXoff);
2309         } else
2310                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2311
2312         tty->termios.c_cflag &= ~CMSPAR;
2313
2314         /* Round the baud rate */
2315         baud = tty_get_baud_rate(tty);
2316         if (!baud) {
2317                 /* pick a default, any default... */
2318                 baud = 9600;
2319         } else {
2320                 /* Avoid a zero divisor. */
2321                 baud = min(baud, 461550);
2322                 tty_encode_baud_rate(tty, baud, baud);
2323         }
2324
2325         edge_port->baud_rate = baud;
2326         config->wBaudRate = (u16)((461550L + baud/2) / baud);
2327
2328         /* FIXME: Recompute actual baud from divisor here */
2329
2330         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2331
2332         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2333         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2334         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2335         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2336         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2337         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2338         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2339         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2340
2341         /* move the word values into big endian mode */
2342         cpu_to_be16s(&config->wFlags);
2343         cpu_to_be16s(&config->wBaudRate);
2344
2345         status = send_port_cmd(edge_port->port, UMPC_SET_CONFIG, 0, config,
2346                         sizeof(*config));
2347         if (status)
2348                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2349                         __func__, status);
2350         kfree(config);
2351 }
2352
2353 static void edge_set_termios(struct tty_struct *tty,
2354                 struct usb_serial_port *port, struct ktermios *old_termios)
2355 {
2356         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2357
2358         if (edge_port == NULL)
2359                 return;
2360         /* change the port settings to the new ones specified */
2361         change_port_settings(tty, edge_port, old_termios);
2362 }
2363
2364 static int edge_tiocmset(struct tty_struct *tty,
2365                                         unsigned int set, unsigned int clear)
2366 {
2367         struct usb_serial_port *port = tty->driver_data;
2368         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2369         unsigned int mcr;
2370         unsigned long flags;
2371
2372         spin_lock_irqsave(&edge_port->ep_lock, flags);
2373         mcr = edge_port->shadow_mcr;
2374         if (set & TIOCM_RTS)
2375                 mcr |= MCR_RTS;
2376         if (set & TIOCM_DTR)
2377                 mcr |= MCR_DTR;
2378         if (set & TIOCM_LOOP)
2379                 mcr |= MCR_LOOPBACK;
2380
2381         if (clear & TIOCM_RTS)
2382                 mcr &= ~MCR_RTS;
2383         if (clear & TIOCM_DTR)
2384                 mcr &= ~MCR_DTR;
2385         if (clear & TIOCM_LOOP)
2386                 mcr &= ~MCR_LOOPBACK;
2387
2388         edge_port->shadow_mcr = mcr;
2389         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2390
2391         restore_mcr(edge_port, mcr);
2392         return 0;
2393 }
2394
2395 static int edge_tiocmget(struct tty_struct *tty)
2396 {
2397         struct usb_serial_port *port = tty->driver_data;
2398         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2399         unsigned int result = 0;
2400         unsigned int msr;
2401         unsigned int mcr;
2402         unsigned long flags;
2403
2404         spin_lock_irqsave(&edge_port->ep_lock, flags);
2405
2406         msr = edge_port->shadow_msr;
2407         mcr = edge_port->shadow_mcr;
2408         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2409                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2410                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2411                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2412                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2413                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2414
2415
2416         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2417         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2418
2419         return result;
2420 }
2421
2422 static void edge_break(struct tty_struct *tty, int break_state)
2423 {
2424         struct usb_serial_port *port = tty->driver_data;
2425         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2426         int status;
2427         int bv = 0;     /* Off */
2428
2429         if (break_state == -1)
2430                 bv = 1; /* On */
2431         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2432         if (status)
2433                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2434                         __func__, status);
2435 }
2436
2437 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
2438 {
2439         if (!edge_serial->use_heartbeat)
2440                 return;
2441
2442         schedule_delayed_work(&edge_serial->heartbeat_work,
2443                         FW_HEARTBEAT_SECS * HZ);
2444 }
2445
2446 static void edge_heartbeat_work(struct work_struct *work)
2447 {
2448         struct edgeport_serial *serial;
2449         struct ti_i2c_desc *rom_desc;
2450
2451         serial = container_of(work, struct edgeport_serial,
2452                         heartbeat_work.work);
2453
2454         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
2455
2456         /* Descriptor address request is enough to reset the firmware timer */
2457         if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
2458                         rom_desc)) {
2459                 dev_err(&serial->serial->interface->dev,
2460                                 "%s - Incomplete heartbeat\n", __func__);
2461         }
2462         kfree(rom_desc);
2463
2464         edge_heartbeat_schedule(serial);
2465 }
2466
2467 static int edge_calc_num_ports(struct usb_serial *serial,
2468                                 struct usb_serial_endpoints *epds)
2469 {
2470         struct device *dev = &serial->interface->dev;
2471         unsigned char num_ports = serial->type->num_ports;
2472
2473         /* Make sure we have the required endpoints when in download mode. */
2474         if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) {
2475                 if (epds->num_bulk_in < num_ports ||
2476                                 epds->num_bulk_out < num_ports ||
2477                                 epds->num_interrupt_in < 1) {
2478                         dev_err(dev, "required endpoints missing\n");
2479                         return -ENODEV;
2480                 }
2481         }
2482
2483         return num_ports;
2484 }
2485
2486 static int edge_startup(struct usb_serial *serial)
2487 {
2488         struct edgeport_serial *edge_serial;
2489         int status;
2490         u16 product_id;
2491
2492         /* create our private serial structure */
2493         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2494         if (!edge_serial)
2495                 return -ENOMEM;
2496
2497         mutex_init(&edge_serial->es_lock);
2498         edge_serial->serial = serial;
2499         INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
2500         usb_set_serial_data(serial, edge_serial);
2501
2502         status = download_fw(edge_serial);
2503         if (status < 0) {
2504                 kfree(edge_serial);
2505                 return status;
2506         }
2507
2508         if (status > 0)
2509                 return 1;       /* bind but do not register any ports */
2510
2511         product_id = le16_to_cpu(
2512                         edge_serial->serial->dev->descriptor.idProduct);
2513
2514         /* Currently only the EP/416 models require heartbeat support */
2515         if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
2516                 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
2517                         product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
2518                         edge_serial->use_heartbeat = true;
2519                 }
2520         }
2521
2522         edge_heartbeat_schedule(edge_serial);
2523
2524         return 0;
2525 }
2526
2527 static void edge_disconnect(struct usb_serial *serial)
2528 {
2529         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2530
2531         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2532 }
2533
2534 static void edge_release(struct usb_serial *serial)
2535 {
2536         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2537
2538         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2539         kfree(edge_serial);
2540 }
2541
2542 static int edge_port_probe(struct usb_serial_port *port)
2543 {
2544         struct edgeport_port *edge_port;
2545         int ret;
2546
2547         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2548         if (!edge_port)
2549                 return -ENOMEM;
2550
2551         spin_lock_init(&edge_port->ep_lock);
2552         edge_port->port = port;
2553         edge_port->edge_serial = usb_get_serial_data(port->serial);
2554         edge_port->bUartMode = default_uart_mode;
2555
2556         switch (port->port_number) {
2557         case 0:
2558                 edge_port->uart_base = UMPMEM_BASE_UART1;
2559                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2560                 break;
2561         case 1:
2562                 edge_port->uart_base = UMPMEM_BASE_UART2;
2563                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2564                 break;
2565         default:
2566                 dev_err(&port->dev, "unknown port number\n");
2567                 ret = -ENODEV;
2568                 goto err;
2569         }
2570
2571         dev_dbg(&port->dev,
2572                 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2573                 __func__, port->port_number, edge_port->uart_base,
2574                 edge_port->dma_address);
2575
2576         usb_set_serial_port_data(port, edge_port);
2577
2578         ret = edge_create_sysfs_attrs(port);
2579         if (ret)
2580                 goto err;
2581
2582         /*
2583          * The LSR does not tell when the transmitter shift register has
2584          * emptied so add a one-character drain delay.
2585          */
2586         port->port.drain_delay = 1;
2587
2588         return 0;
2589 err:
2590         kfree(edge_port);
2591
2592         return ret;
2593 }
2594
2595 static void edge_port_remove(struct usb_serial_port *port)
2596 {
2597         struct edgeport_port *edge_port;
2598
2599         edge_port = usb_get_serial_port_data(port);
2600         edge_remove_sysfs_attrs(port);
2601         kfree(edge_port);
2602 }
2603
2604 /* Sysfs Attributes */
2605
2606 static ssize_t uart_mode_show(struct device *dev,
2607         struct device_attribute *attr, char *buf)
2608 {
2609         struct usb_serial_port *port = to_usb_serial_port(dev);
2610         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2611
2612         return sprintf(buf, "%d\n", edge_port->bUartMode);
2613 }
2614
2615 static ssize_t uart_mode_store(struct device *dev,
2616         struct device_attribute *attr, const char *valbuf, size_t count)
2617 {
2618         struct usb_serial_port *port = to_usb_serial_port(dev);
2619         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2620         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2621
2622         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2623
2624         if (v < 256)
2625                 edge_port->bUartMode = v;
2626         else
2627                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2628
2629         return count;
2630 }
2631 static DEVICE_ATTR_RW(uart_mode);
2632
2633 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2634 {
2635         return device_create_file(&port->dev, &dev_attr_uart_mode);
2636 }
2637
2638 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2639 {
2640         device_remove_file(&port->dev, &dev_attr_uart_mode);
2641         return 0;
2642 }
2643
2644 #ifdef CONFIG_PM
2645 static int edge_suspend(struct usb_serial *serial, pm_message_t message)
2646 {
2647         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2648
2649         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2650
2651         return 0;
2652 }
2653
2654 static int edge_resume(struct usb_serial *serial)
2655 {
2656         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2657
2658         edge_heartbeat_schedule(edge_serial);
2659
2660         return 0;
2661 }
2662 #endif
2663
2664 static struct usb_serial_driver edgeport_1port_device = {
2665         .driver = {
2666                 .owner          = THIS_MODULE,
2667                 .name           = "edgeport_ti_1",
2668         },
2669         .description            = "Edgeport TI 1 port adapter",
2670         .id_table               = edgeport_1port_id_table,
2671         .num_ports              = 1,
2672         .num_bulk_out           = 1,
2673         .open                   = edge_open,
2674         .close                  = edge_close,
2675         .throttle               = edge_throttle,
2676         .unthrottle             = edge_unthrottle,
2677         .attach                 = edge_startup,
2678         .calc_num_ports         = edge_calc_num_ports,
2679         .disconnect             = edge_disconnect,
2680         .release                = edge_release,
2681         .port_probe             = edge_port_probe,
2682         .port_remove            = edge_port_remove,
2683         .set_termios            = edge_set_termios,
2684         .tiocmget               = edge_tiocmget,
2685         .tiocmset               = edge_tiocmset,
2686         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2687         .get_icount             = usb_serial_generic_get_icount,
2688         .write                  = edge_write,
2689         .write_room             = edge_write_room,
2690         .chars_in_buffer        = edge_chars_in_buffer,
2691         .tx_empty               = edge_tx_empty,
2692         .break_ctl              = edge_break,
2693         .read_int_callback      = edge_interrupt_callback,
2694         .read_bulk_callback     = edge_bulk_in_callback,
2695         .write_bulk_callback    = edge_bulk_out_callback,
2696 #ifdef CONFIG_PM
2697         .suspend                = edge_suspend,
2698         .resume                 = edge_resume,
2699 #endif
2700 };
2701
2702 static struct usb_serial_driver edgeport_2port_device = {
2703         .driver = {
2704                 .owner          = THIS_MODULE,
2705                 .name           = "edgeport_ti_2",
2706         },
2707         .description            = "Edgeport TI 2 port adapter",
2708         .id_table               = edgeport_2port_id_table,
2709         .num_ports              = 2,
2710         .num_bulk_out           = 1,
2711         .open                   = edge_open,
2712         .close                  = edge_close,
2713         .throttle               = edge_throttle,
2714         .unthrottle             = edge_unthrottle,
2715         .attach                 = edge_startup,
2716         .calc_num_ports         = edge_calc_num_ports,
2717         .disconnect             = edge_disconnect,
2718         .release                = edge_release,
2719         .port_probe             = edge_port_probe,
2720         .port_remove            = edge_port_remove,
2721         .set_termios            = edge_set_termios,
2722         .tiocmget               = edge_tiocmget,
2723         .tiocmset               = edge_tiocmset,
2724         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2725         .get_icount             = usb_serial_generic_get_icount,
2726         .write                  = edge_write,
2727         .write_room             = edge_write_room,
2728         .chars_in_buffer        = edge_chars_in_buffer,
2729         .tx_empty               = edge_tx_empty,
2730         .break_ctl              = edge_break,
2731         .read_int_callback      = edge_interrupt_callback,
2732         .read_bulk_callback     = edge_bulk_in_callback,
2733         .write_bulk_callback    = edge_bulk_out_callback,
2734 #ifdef CONFIG_PM
2735         .suspend                = edge_suspend,
2736         .resume                 = edge_resume,
2737 #endif
2738 };
2739
2740 static struct usb_serial_driver * const serial_drivers[] = {
2741         &edgeport_1port_device, &edgeport_2port_device, NULL
2742 };
2743
2744 module_usb_serial_driver(serial_drivers, id_table_combined);
2745
2746 MODULE_AUTHOR(DRIVER_AUTHOR);
2747 MODULE_DESCRIPTION(DRIVER_DESC);
2748 MODULE_LICENSE("GPL");
2749 MODULE_FIRMWARE("edgeport/down3.bin");
2750
2751 module_param(ignore_cpu_rev, bool, 0644);
2752 MODULE_PARM_DESC(ignore_cpu_rev,
2753                         "Ignore the cpu revision when connecting to a device");
2754
2755 module_param(default_uart_mode, int, 0644);
2756 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");