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,
 225                              const struct ktermios *old_termios);
 226 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty);
 227
 228 static int do_download_mode(struct edgeport_serial *serial,
 229                 const struct firmware *fw);
 230 static int do_boot_mode(struct edgeport_serial *serial,
 231                 const struct firmware *fw);
 232
 233 /* sysfs attributes */
 234 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 235 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 236
 237 /*
 238  * Some release of Edgeport firmware "(DEBLOBBED)" after version 4.80
 239  * introduced code to automatically disconnect idle devices on some
 240  * Edgeport models after periods of inactivity, typically ~60 seconds.
 241  * This occurs without regard to whether ports on the device are open
 242  * or not.  Digi International Tech Support suggested:
 243  *
 244  * 1.  Adding driver "heartbeat" code to reset the firmware timer by
 245  *     requesting a descriptor record every 15 seconds, which should be
 246  *     effective with newer firmware versions that require it, and benign
 247  *     with older versions that do not. In practice 40 seconds seems often
 248  *     enough.
 249  * 2.  The heartbeat code is currently required only on Edgeport/416 models.
 250  */
 251 #define FW_HEARTBEAT_VERSION_CUTOFF ((4 << 8) + 80)
 252 #define FW_HEARTBEAT_SECS 40
 253
 254 /* Timeouts in msecs: firmware downloads take longer */
 255 #define TI_VSEND_TIMEOUT_DEFAULT 1000
 256 #define TI_VSEND_TIMEOUT_FW_DOWNLOAD 10000
 257
 258 static int ti_vread_sync(struct usb_device *dev, u8 request, u16 value,
 259                 u16 index, void *data, int size)
 260 {
 261         int status;
 262
 263         status = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), request,
 264                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
 265                         value, index, data, size, 1000);
 266         if (status < 0)
 267                 return status;
 268         if (status != size) {
 269                 dev_dbg(&dev->dev, "%s - wanted to read %d, but only read %d\n",
 270                         __func__, size, status);
 271                 return -ECOMM;
 272         }
 273         return 0;
 274 }
 275
 276 static int ti_vsend_sync(struct usb_device *dev, u8 request, u16 value,
 277                 u16 index, void *data, int size, int timeout)
 278 {
 279         int status;
 280
 281         status = usb_control_msg(dev, usb_sndctrlpipe(dev, 0), request,
 282                         (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
 283                         value, index, data, size, timeout);
 284         if (status < 0)
 285                 return status;
 286
 287         return 0;
 288 }
 289
 290 static int read_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
 291                 void *data, int size)
 292 {
 293         return ti_vread_sync(port->serial->dev, command, value,
 294                         UMPM_UART1_PORT + port->port_number,
 295                         data, size);
 296 }
 297
 298 static int send_port_cmd(struct usb_serial_port *port, u8 command, u16 value,
 299                 void *data, int size)
 300 {
 301         return ti_vsend_sync(port->serial->dev, command, value,
 302                         UMPM_UART1_PORT + port->port_number,
 303                         data, size, TI_VSEND_TIMEOUT_DEFAULT);
 304 }
 305
 306 /* clear tx/rx buffers and fifo in TI UMP */
 307 static int purge_port(struct usb_serial_port *port, u16 mask)
 308 {
 309         int port_number = port->port_number;
 310
 311         dev_dbg(&port->dev, "%s - port %d, mask %x\n", __func__, port_number, mask);
 312
 313         return send_port_cmd(port, UMPC_PURGE_PORT, mask, NULL, 0);
 314 }
 315
 316 /**
 317  * read_download_mem - Read edgeport memory from TI chip
 318  * @dev: usb device pointer
 319  * @start_address: Device CPU address at which to read
 320  * @length: Length of above data
 321  * @address_type: Can read both XDATA and I2C
 322  * @buffer: pointer to input data buffer
 323  */
 324 static int read_download_mem(struct usb_device *dev, int start_address,
 325                                 int length, u8 address_type, u8 *buffer)
 326 {
 327         int status = 0;
 328         u8 read_length;
 329         u16 be_start_address;
 330
 331         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, length);
 332
 333         /*
 334          * Read in blocks of 64 bytes
 335          * (TI firmware can't handle more than 64 byte reads)
 336          */
 337         while (length) {
 338                 if (length > 64)
 339                         read_length = 64;
 340                 else
 341                         read_length = (u8)length;
 342
 343                 if (read_length > 1) {
 344                         dev_dbg(&dev->dev, "%s - @ %x for %d\n", __func__, start_address, read_length);
 345                 }
 346                 /*
 347                  * NOTE: Must use swab as wIndex is sent in little-endian
 348                  *       byte order regardless of host byte order.
 349                  */
 350                 be_start_address = swab16((u16)start_address);
 351                 status = ti_vread_sync(dev, UMPC_MEMORY_READ,
 352                                         (u16)address_type,
 353                                         be_start_address,
 354                                         buffer, read_length);
 355
 356                 if (status) {
 357                         dev_dbg(&dev->dev, "%s - ERROR %x\n", __func__, status);
 358                         return status;
 359                 }
 360
 361                 if (read_length > 1)
 362                         usb_serial_debug_data(&dev->dev, __func__, read_length, buffer);
 363
 364                 /* Update pointers/length */
 365                 start_address += read_length;
 366                 buffer += read_length;
 367                 length -= read_length;
 368         }
 369
 370         return status;
 371 }
 372
 373 static int read_ram(struct usb_device *dev, int start_address,
 374                                                 int length, u8 *buffer)
 375 {
 376         return read_download_mem(dev, start_address, length,
 377                                         DTK_ADDR_SPACE_XDATA, buffer);
 378 }
 379
 380 /* Read edgeport memory to a given block */
 381 static int read_boot_mem(struct edgeport_serial *serial,
 382                                 int start_address, int length, u8 *buffer)
 383 {
 384         int status = 0;
 385         int i;
 386
 387         for (i = 0; i < length; i++) {
 388                 status = ti_vread_sync(serial->serial->dev,
 389                                 UMPC_MEMORY_READ, serial->TI_I2C_Type,
 390                                 (u16)(start_address+i), &buffer[i], 0x01);
 391                 if (status) {
 392                         dev_dbg(&serial->serial->dev->dev, "%s - ERROR %x\n", __func__, status);
 393                         return status;
 394                 }
 395         }
 396
 397         dev_dbg(&serial->serial->dev->dev, "%s - start_address = %x, length = %d\n",
 398                 __func__, start_address, length);
 399         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 400
 401         serial->TiReadI2C = 1;
 402
 403         return status;
 404 }
 405
 406 /* Write given block to TI EPROM memory */
 407 static int write_boot_mem(struct edgeport_serial *serial,
 408                                 int start_address, int length, u8 *buffer)
 409 {
 410         int status = 0;
 411         int i;
 412         u8 *temp;
 413
 414         /* Must do a read before write */
 415         if (!serial->TiReadI2C) {
 416                 temp = kmalloc(1, GFP_KERNEL);
 417                 if (!temp)
 418                         return -ENOMEM;
 419
 420                 status = read_boot_mem(serial, 0, 1, temp);
 421                 kfree(temp);
 422                 if (status)
 423                         return status;
 424         }
 425
 426         for (i = 0; i < length; ++i) {
 427                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 428                                 buffer[i], (u16)(i + start_address), NULL,
 429                                 0, TI_VSEND_TIMEOUT_DEFAULT);
 430                 if (status)
 431                         return status;
 432         }
 433
 434         dev_dbg(&serial->serial->dev->dev, "%s - start_sddr = %x, length = %d\n", __func__, start_address, length);
 435         usb_serial_debug_data(&serial->serial->dev->dev, __func__, length, buffer);
 436
 437         return status;
 438 }
 439
 440 /* Write edgeport I2C memory to TI chip */
 441 static int write_i2c_mem(struct edgeport_serial *serial,
 442                 int start_address, int length, u8 address_type, u8 *buffer)
 443 {
 444         struct device *dev = &serial->serial->dev->dev;
 445         int status = 0;
 446         int write_length;
 447         u16 be_start_address;
 448
 449         /* We can only send a maximum of 1 aligned byte page at a time */
 450
 451         /* calculate the number of bytes left in the first page */
 452         write_length = EPROM_PAGE_SIZE -
 453                                 (start_address & (EPROM_PAGE_SIZE - 1));
 454
 455         if (write_length > length)
 456                 write_length = length;
 457
 458         dev_dbg(dev, "%s - BytesInFirstPage Addr = %x, length = %d\n",
 459                 __func__, start_address, write_length);
 460         usb_serial_debug_data(dev, __func__, write_length, buffer);
 461
 462         /*
 463          * Write first page.
 464          *
 465          * NOTE: Must use swab as wIndex is sent in little-endian byte order
 466          *       regardless of host byte order.
 467          */
 468         be_start_address = swab16((u16)start_address);
 469         status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 470                                 (u16)address_type, be_start_address,
 471                                 buffer, write_length, TI_VSEND_TIMEOUT_DEFAULT);
 472         if (status) {
 473                 dev_dbg(dev, "%s - ERROR %d\n", __func__, status);
 474                 return status;
 475         }
 476
 477         length          -= write_length;
 478         start_address   += write_length;
 479         buffer          += write_length;
 480
 481         /*
 482          * We should be aligned now -- can write max page size bytes at a
 483          * time.
 484          */
 485         while (length) {
 486                 if (length > EPROM_PAGE_SIZE)
 487                         write_length = EPROM_PAGE_SIZE;
 488                 else
 489                         write_length = length;
 490
 491                 dev_dbg(dev, "%s - Page Write Addr = %x, length = %d\n",
 492                         __func__, start_address, write_length);
 493                 usb_serial_debug_data(dev, __func__, write_length, buffer);
 494
 495                 /*
 496                  * Write next page.
 497                  *
 498                  * NOTE: Must use swab as wIndex is sent in little-endian byte
 499                  *       order regardless of host byte order.
 500                  */
 501                 be_start_address = swab16((u16)start_address);
 502                 status = ti_vsend_sync(serial->serial->dev, UMPC_MEMORY_WRITE,
 503                                 (u16)address_type, be_start_address, buffer,
 504                                 write_length, TI_VSEND_TIMEOUT_DEFAULT);
 505                 if (status) {
 506                         dev_err(dev, "%s - ERROR %d\n", __func__, status);
 507                         return status;
 508                 }
 509
 510                 length          -= write_length;
 511                 start_address   += write_length;
 512                 buffer          += write_length;
 513         }
 514         return status;
 515 }
 516
 517 /*
 518  * Examine the UMP DMA registers and LSR
 519  *
 520  * Check the MSBit of the X and Y DMA byte count registers.
 521  * A zero in this bit indicates that the TX DMA buffers are empty
 522  * then check the TX Empty bit in the UART.
 523  */
 524 static int tx_active(struct edgeport_port *port)
 525 {
 526         int status;
 527         struct out_endpoint_desc_block *oedb;
 528         u8 *lsr;
 529         int bytes_left = 0;
 530
 531         oedb = kmalloc(sizeof(*oedb), GFP_KERNEL);
 532         if (!oedb)
 533                 return -ENOMEM;
 534
 535         /*
 536          * Sigh, that's right, just one byte, as not all platforms can
 537          * do DMA from stack
 538          */
 539         lsr = kmalloc(1, GFP_KERNEL);
 540         if (!lsr) {
 541                 kfree(oedb);
 542                 return -ENOMEM;
 543         }
 544         /* Read the DMA Count Registers */
 545         status = read_ram(port->port->serial->dev, port->dma_address,
 546                                                 sizeof(*oedb), (void *)oedb);
 547         if (status)
 548                 goto exit_is_tx_active;
 549
 550         dev_dbg(&port->port->dev, "%s - XByteCount    0x%X\n", __func__, oedb->XByteCount);
 551
 552         /* and the LSR */
 553         status = read_ram(port->port->serial->dev,
 554                         port->uart_base + UMPMEM_OFFS_UART_LSR, 1, lsr);
 555
 556         if (status)
 557                 goto exit_is_tx_active;
 558         dev_dbg(&port->port->dev, "%s - LSR = 0x%X\n", __func__, *lsr);
 559
 560         /* If either buffer has data or we are transmitting then return TRUE */
 561         if ((oedb->XByteCount & 0x80) != 0)
 562                 bytes_left += 64;
 563
 564         if ((*lsr & UMP_UART_LSR_TX_MASK) == 0)
 565                 bytes_left += 1;
 566
 567         /* We return Not Active if we get any kind of error */
 568 exit_is_tx_active:
 569         dev_dbg(&port->port->dev, "%s - return %d\n", __func__, bytes_left);
 570
 571         kfree(lsr);
 572         kfree(oedb);
 573         return bytes_left;
 574 }
 575
 576 static int choose_config(struct usb_device *dev)
 577 {
 578         /*
 579          * There may be multiple configurations on this device, in which case
 580          * we would need to read and parse all of them to find out which one
 581          * we want. However, we just support one config at this point,
 582          * configuration # 1, which is Config Descriptor 0.
 583          */
 584
 585         dev_dbg(&dev->dev, "%s - Number of Interfaces = %d\n",
 586                 __func__, dev->config->desc.bNumInterfaces);
 587         dev_dbg(&dev->dev, "%s - MAX Power            = %d\n",
 588                 __func__, dev->config->desc.bMaxPower * 2);
 589
 590         if (dev->config->desc.bNumInterfaces != 1) {
 591                 dev_err(&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __func__);
 592                 return -ENODEV;
 593         }
 594
 595         return 0;
 596 }
 597
 598 static int read_rom(struct edgeport_serial *serial,
 599                                 int start_address, int length, u8 *buffer)
 600 {
 601         int status;
 602
 603         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 604                 status = read_download_mem(serial->serial->dev,
 605                                                start_address,
 606                                                length,
 607                                                serial->TI_I2C_Type,
 608                                                buffer);
 609         } else {
 610                 status = read_boot_mem(serial, start_address, length,
 611                                                                 buffer);
 612         }
 613         return status;
 614 }
 615
 616 static int write_rom(struct edgeport_serial *serial, int start_address,
 617                                                 int length, u8 *buffer)
 618 {
 619         if (serial->product_info.TiMode == TI_MODE_BOOT)
 620                 return write_boot_mem(serial, start_address, length,
 621                                                                 buffer);
 622
 623         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 624                 return write_i2c_mem(serial, start_address, length,
 625                                                 serial->TI_I2C_Type, buffer);
 626         return -EINVAL;
 627 }
 628
 629 /* Read a descriptor header from I2C based on type */
 630 static int get_descriptor_addr(struct edgeport_serial *serial,
 631                                 int desc_type, struct ti_i2c_desc *rom_desc)
 632 {
 633         int start_address;
 634         int status;
 635
 636         /* Search for requested descriptor in I2C */
 637         start_address = 2;
 638         do {
 639                 status = read_rom(serial,
 640                                    start_address,
 641                                    sizeof(struct ti_i2c_desc),
 642                                    (u8 *)rom_desc);
 643                 if (status)
 644                         return 0;
 645
 646                 if (rom_desc->Type == desc_type)
 647                         return start_address;
 648
 649                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 650                                                 le16_to_cpu(rom_desc->Size);
 651
 652         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 653
 654         return 0;
 655 }
 656
 657 /* Validate descriptor checksum */
 658 static int valid_csum(struct ti_i2c_desc *rom_desc, u8 *buffer)
 659 {
 660         u16 i;
 661         u8 cs = 0;
 662
 663         for (i = 0; i < le16_to_cpu(rom_desc->Size); i++)
 664                 cs = (u8)(cs + buffer[i]);
 665
 666         if (cs != rom_desc->CheckSum) {
 667                 pr_debug("%s - Mismatch %x - %x", __func__, rom_desc->CheckSum, cs);
 668                 return -EINVAL;
 669         }
 670         return 0;
 671 }
 672
 673 /* Make sure that the I2C image is good */
 674 static int check_i2c_image(struct edgeport_serial *serial)
 675 {
 676         struct device *dev = &serial->serial->dev->dev;
 677         int status = 0;
 678         struct ti_i2c_desc *rom_desc;
 679         int start_address = 2;
 680         u8 *buffer;
 681         u16 ttype;
 682
 683         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 684         if (!rom_desc)
 685                 return -ENOMEM;
 686
 687         buffer = kmalloc(TI_MAX_I2C_SIZE, GFP_KERNEL);
 688         if (!buffer) {
 689                 kfree(rom_desc);
 690                 return -ENOMEM;
 691         }
 692
 693         /* Read the first byte (Signature0) must be 0x52 or 0x10 */
 694         status = read_rom(serial, 0, 1, buffer);
 695         if (status)
 696                 goto out;
 697
 698         if (*buffer != UMP5152 && *buffer != UMP3410) {
 699                 dev_err(dev, "%s - invalid buffer signature\n", __func__);
 700                 status = -ENODEV;
 701                 goto out;
 702         }
 703
 704         do {
 705                 /* Validate the I2C */
 706                 status = read_rom(serial,
 707                                 start_address,
 708                                 sizeof(struct ti_i2c_desc),
 709                                 (u8 *)rom_desc);
 710                 if (status)
 711                         break;
 712
 713                 if ((start_address + sizeof(struct ti_i2c_desc) +
 714                         le16_to_cpu(rom_desc->Size)) > TI_MAX_I2C_SIZE) {
 715                         status = -ENODEV;
 716                         dev_dbg(dev, "%s - structure too big, erroring out.\n", __func__);
 717                         break;
 718                 }
 719
 720                 dev_dbg(dev, "%s Type = 0x%x\n", __func__, rom_desc->Type);
 721
 722                 /* Skip type 2 record */
 723                 ttype = rom_desc->Type & 0x0f;
 724                 if (ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 725                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO) {
 726                         /* Read the descriptor data */
 727                         status = read_rom(serial, start_address +
 728                                                 sizeof(struct ti_i2c_desc),
 729                                                 le16_to_cpu(rom_desc->Size),
 730                                                 buffer);
 731                         if (status)
 732                                 break;
 733
 734                         status = valid_csum(rom_desc, buffer);
 735                         if (status)
 736                                 break;
 737                 }
 738                 start_address = start_address + sizeof(struct ti_i2c_desc) +
 739                                                 le16_to_cpu(rom_desc->Size);
 740
 741         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) &&
 742                                 (start_address < TI_MAX_I2C_SIZE));
 743
 744         if ((rom_desc->Type != I2C_DESC_TYPE_ION) ||
 745                                 (start_address > TI_MAX_I2C_SIZE))
 746                 status = -ENODEV;
 747
 748 out:
 749         kfree(buffer);
 750         kfree(rom_desc);
 751         return status;
 752 }
 753
 754 static int get_manuf_info(struct edgeport_serial *serial, u8 *buffer)
 755 {
 756         int status;
 757         int start_address;
 758         struct ti_i2c_desc *rom_desc;
 759         struct edge_ti_manuf_descriptor *desc;
 760         struct device *dev = &serial->serial->dev->dev;
 761
 762         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
 763         if (!rom_desc)
 764                 return -ENOMEM;
 765
 766         start_address = get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
 767                                                                 rom_desc);
 768
 769         if (!start_address) {
 770                 dev_dbg(dev, "%s - Edge Descriptor not found in I2C\n", __func__);
 771                 status = -ENODEV;
 772                 goto exit;
 773         }
 774
 775         /* Read the descriptor data */
 776         status = read_rom(serial, start_address+sizeof(struct ti_i2c_desc),
 777                                         le16_to_cpu(rom_desc->Size), buffer);
 778         if (status)
 779                 goto exit;
 780
 781         status = valid_csum(rom_desc, buffer);
 782
 783         desc = (struct edge_ti_manuf_descriptor *)buffer;
 784         dev_dbg(dev, "%s - IonConfig      0x%x\n", __func__, desc->IonConfig);
 785         dev_dbg(dev, "%s - Version          %d\n", __func__, desc->Version);
 786         dev_dbg(dev, "%s - Cpu/Board      0x%x\n", __func__, desc->CpuRev_BoardRev);
 787         dev_dbg(dev, "%s - NumPorts         %d\n", __func__, desc->NumPorts);
 788         dev_dbg(dev, "%s - NumVirtualPorts  %d\n", __func__, desc->NumVirtualPorts);
 789         dev_dbg(dev, "%s - TotalPorts       %d\n", __func__, desc->TotalPorts);
 790
 791 exit:
 792         kfree(rom_desc);
 793         return status;
 794 }
 795
 796 /* Build firmware header used for firmware update */
 797 static int build_i2c_fw_hdr(u8 *header, const struct firmware *fw)
 798 {
 799         u8 *buffer;
 800         int buffer_size;
 801         int i;
 802         u8 cs = 0;
 803         struct ti_i2c_desc *i2c_header;
 804         struct ti_i2c_image_header *img_header;
 805         struct ti_i2c_firmware_rec *firmware_rec;
 806         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 807
 808         /*
 809          * In order to update the I2C firmware we must change the type 2 record
 810          * to type 0xF2.  This will force the UMP to come up in Boot Mode.
 811          * Then while in boot mode, the driver will download the latest
 812          * firmware (padded to 15.5k) into the UMP ram.  And finally when the
 813          * device comes back up in download mode the driver will cause the new
 814          * firmware to be copied from the UMP Ram to I2C and the firmware will
 815          * update the record type from 0xf2 to 0x02.
 816          */
 817
 818         /*
 819          * Allocate a 15.5k buffer + 2 bytes for version number (Firmware
 820          * Record)
 821          */
 822         buffer_size = (((1024 * 16) - 512 ) +
 823                         sizeof(struct ti_i2c_firmware_rec));
 824
 825         buffer = kmalloc(buffer_size, GFP_KERNEL);
 826         if (!buffer)
 827                 return -ENOMEM;
 828
 829         /* Set entire image of 0xffs */
 830         memset(buffer, 0xff, buffer_size);
 831
 832         /* Copy version number into firmware record */
 833         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 834
 835         firmware_rec->Ver_Major = fw_hdr->major_version;
 836         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 837
 838         /* Pointer to fw_down memory image */
 839         img_header = (struct ti_i2c_image_header *)&fw->data[4];
 840
 841         memcpy(buffer + sizeof(struct ti_i2c_firmware_rec),
 842                 &fw->data[4 + sizeof(struct ti_i2c_image_header)],
 843                 le16_to_cpu(img_header->Length));
 844
 845         for (i=0; i < buffer_size; i++) {
 846                 cs = (u8)(cs + buffer[i]);
 847         }
 848
 849         kfree(buffer);
 850
 851         /* Build new header */
 852         i2c_header =  (struct ti_i2c_desc *)header;
 853         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 854
 855         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 856         i2c_header->Size        = cpu_to_le16(buffer_size);
 857         i2c_header->CheckSum    = cs;
 858         firmware_rec->Ver_Major = fw_hdr->major_version;
 859         firmware_rec->Ver_Minor = fw_hdr->minor_version;
 860
 861         return 0;
 862 }
 863
 864 /* Try to figure out what type of I2c we have */
 865 static int i2c_type_bootmode(struct edgeport_serial *serial)
 866 {
 867         struct device *dev = &serial->serial->dev->dev;
 868         int status;
 869         u8 *data;
 870
 871         data = kmalloc(1, GFP_KERNEL);
 872         if (!data)
 873                 return -ENOMEM;
 874
 875         /* Try to read type 2 */
 876         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 877                                 DTK_ADDR_SPACE_I2C_TYPE_II, 0, data, 0x01);
 878         if (status)
 879                 dev_dbg(dev, "%s - read 2 status error = %d\n", __func__, status);
 880         else
 881                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 882         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 883                 dev_dbg(dev, "%s - ROM_TYPE_II\n", __func__);
 884                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 885                 goto out;
 886         }
 887
 888         /* Try to read type 3 */
 889         status = ti_vread_sync(serial->serial->dev, UMPC_MEMORY_READ,
 890                                 DTK_ADDR_SPACE_I2C_TYPE_III, 0, data, 0x01);
 891         if (status)
 892                 dev_dbg(dev, "%s - read 3 status error = %d\n", __func__, status);
 893         else
 894                 dev_dbg(dev, "%s - read 2 data = 0x%x\n", __func__, *data);
 895         if ((!status) && (*data == UMP5152 || *data == UMP3410)) {
 896                 dev_dbg(dev, "%s - ROM_TYPE_III\n", __func__);
 897                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 898                 goto out;
 899         }
 900
 901         dev_dbg(dev, "%s - Unknown\n", __func__);
 902         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 903         status = -ENODEV;
 904 out:
 905         kfree(data);
 906         return status;
 907 }
 908
 909 static int bulk_xfer(struct usb_serial *serial, void *buffer,
 910                                                 int length, int *num_sent)
 911 {
 912         int status;
 913
 914         status = usb_bulk_msg(serial->dev,
 915                         usb_sndbulkpipe(serial->dev,
 916                                 serial->port[0]->bulk_out_endpointAddress),
 917                         buffer, length, num_sent, 1000);
 918         return status;
 919 }
 920
 921 /* Download given firmware image to the device (IN BOOT MODE) */
 922 static int download_code(struct edgeport_serial *serial, u8 *image,
 923                                                         int image_length)
 924 {
 925         int status = 0;
 926         int pos;
 927         int transfer;
 928         int done;
 929
 930         /* Transfer firmware image */
 931         for (pos = 0; pos < image_length; ) {
 932                 /* Read the next buffer from file */
 933                 transfer = image_length - pos;
 934                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
 935                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
 936
 937                 /* Transfer data */
 938                 status = bulk_xfer(serial->serial, &image[pos],
 939                                                         transfer, &done);
 940                 if (status)
 941                         break;
 942                 /* Advance buffer pointer */
 943                 pos += done;
 944         }
 945
 946         return status;
 947 }
 948
 949 /* FIXME!!! */
 950 static int config_boot_dev(struct usb_device *dev)
 951 {
 952         return 0;
 953 }
 954
 955 static int ti_cpu_rev(struct edge_ti_manuf_descriptor *desc)
 956 {
 957         return TI_GET_CPU_REVISION(desc->CpuRev_BoardRev);
 958 }
 959
 960 static int check_fw_sanity(struct edgeport_serial *serial,
 961                 const struct firmware *fw)
 962 {
 963         u16 length_total;
 964         u8 checksum = 0;
 965         int pos;
 966         struct device *dev = &serial->serial->interface->dev;
 967         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
 968
 969         if (fw->size < sizeof(struct edgeport_fw_hdr)) {
 970                 dev_err(dev, "incomplete fw header\n");
 971                 return -EINVAL;
 972         }
 973
 974         length_total = le16_to_cpu(fw_hdr->length) +
 975                         sizeof(struct edgeport_fw_hdr);
 976
 977         if (fw->size != length_total) {
 978                 dev_err(dev, "bad fw size (expected: %u, got: %zu)\n",
 979                                 length_total, fw->size);
 980                 return -EINVAL;
 981         }
 982
 983         for (pos = sizeof(struct edgeport_fw_hdr); pos < fw->size; ++pos)
 984                 checksum += fw->data[pos];
 985
 986         if (checksum != fw_hdr->checksum) {
 987                 dev_err(dev, "bad fw checksum (expected: 0x%x, got: 0x%x)\n",
 988                                 fw_hdr->checksum, checksum);
 989                 return -EINVAL;
 990         }
 991
 992         return 0;
 993 }
 994
 995 /*
 996  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
 997  *
 998  * This routine downloads the main operating code into the TI5052, using the
 999  * boot code already burned into E2PROM or ROM.
1000  */
1001 static int download_fw(struct edgeport_serial *serial)
1002 {
1003         struct device *dev = &serial->serial->interface->dev;
1004         int status = 0;
1005         struct usb_interface_descriptor *interface;
1006         const struct firmware *fw;
1007         const char *fw_name = "/*(DEBLOBBED)*/";
1008         struct edgeport_fw_hdr *fw_hdr;
1009
1010         status = reject_firmware(&fw, fw_name, dev);
1011         if (status) {
1012                 dev_err(dev, "Failed to load image \"%s\" err %d\n",
1013                                 fw_name, status);
1014                 return status;
1015         }
1016
1017         if (check_fw_sanity(serial, fw)) {
1018                 status = -EINVAL;
1019                 goto out;
1020         }
1021
1022         fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1023
1024         /* If on-board version is newer, "fw_version" will be updated later. */
1025         serial->fw_version = (fw_hdr->major_version << 8) +
1026                         fw_hdr->minor_version;
1027
1028         /*
1029          * This routine is entered by both the BOOT mode and the Download mode
1030          * We can determine which code is running by the reading the config
1031          * descriptor and if we have only one bulk pipe it is in boot mode
1032          */
1033         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1034
1035         /* Default to type 2 i2c */
1036         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1037
1038         status = choose_config(serial->serial->dev);
1039         if (status)
1040                 goto out;
1041
1042         interface = &serial->serial->interface->cur_altsetting->desc;
1043         if (!interface) {
1044                 dev_err(dev, "%s - no interface set, error!\n", __func__);
1045                 status = -ENODEV;
1046                 goto out;
1047         }
1048
1049         /*
1050          * Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1051          * if we have more than one endpoint we are definitely in download
1052          * mode
1053          */
1054         if (interface->bNumEndpoints > 1) {
1055                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1056                 status = do_download_mode(serial, fw);
1057         } else {
1058                 /* Otherwise we will remain in configuring mode */
1059                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1060                 status = do_boot_mode(serial, fw);
1061         }
1062
1063 out:
1064         release_firmware(fw);
1065         return status;
1066 }
1067
1068 static int do_download_mode(struct edgeport_serial *serial,
1069                 const struct firmware *fw)
1070 {
1071         struct device *dev = &serial->serial->interface->dev;
1072         int status = 0;
1073         int start_address;
1074         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1075         int download_cur_ver;
1076         int download_new_ver;
1077         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1078         struct ti_i2c_desc *rom_desc;
1079
1080         dev_dbg(dev, "%s - RUNNING IN DOWNLOAD MODE\n", __func__);
1081
1082         status = check_i2c_image(serial);
1083         if (status) {
1084                 dev_dbg(dev, "%s - DOWNLOAD MODE -- BAD I2C\n", __func__);
1085                 return status;
1086         }
1087
1088         /*
1089          * Validate Hardware version number
1090          * Read Manufacturing Descriptor from TI Based Edgeport
1091          */
1092         ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1093         if (!ti_manuf_desc)
1094                 return -ENOMEM;
1095
1096         status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
1097         if (status) {
1098                 kfree(ti_manuf_desc);
1099                 return status;
1100         }
1101
1102         /* Check version number of ION descriptor */
1103         if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1104                 dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1105                         __func__, ti_cpu_rev(ti_manuf_desc));
1106                 kfree(ti_manuf_desc);
1107                 return -EINVAL;
1108         }
1109
1110         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
1111         if (!rom_desc) {
1112                 kfree(ti_manuf_desc);
1113                 return -ENOMEM;
1114         }
1115
1116         /* Search for type 2 record (firmware record) */
1117         start_address = get_descriptor_addr(serial,
1118                         I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc);
1119         if (start_address != 0) {
1120                 struct ti_i2c_firmware_rec *firmware_version;
1121                 u8 *record;
1122
1123                 dev_dbg(dev, "%s - Found Type FIRMWARE (Type 2) record\n",
1124                                 __func__);
1125
1126                 firmware_version = kmalloc(sizeof(*firmware_version),
1127                                                         GFP_KERNEL);
1128                 if (!firmware_version) {
1129                         kfree(rom_desc);
1130                         kfree(ti_manuf_desc);
1131                         return -ENOMEM;
1132                 }
1133
1134                 /*
1135                  * Validate version number
1136                  * Read the descriptor data
1137                  */
1138                 status = read_rom(serial, start_address +
1139                                 sizeof(struct ti_i2c_desc),
1140                                 sizeof(struct ti_i2c_firmware_rec),
1141                                 (u8 *)firmware_version);
1142                 if (status) {
1143                         kfree(firmware_version);
1144                         kfree(rom_desc);
1145                         kfree(ti_manuf_desc);
1146                         return status;
1147                 }
1148
1149                 /*
1150                  * Check version number of download with current
1151                  * version in I2c
1152                  */
1153                 download_cur_ver = (firmware_version->Ver_Major << 8) +
1154                                    (firmware_version->Ver_Minor);
1155                 download_new_ver = (fw_hdr->major_version << 8) +
1156                                    (fw_hdr->minor_version);
1157
1158                 dev_dbg(dev, "%s - >> FW Versions Device %d.%d  Driver %d.%d\n",
1159                         __func__, firmware_version->Ver_Major,
1160                         firmware_version->Ver_Minor,
1161                         fw_hdr->major_version, fw_hdr->minor_version);
1162
1163                 /*
1164                  * Check if we have an old version in the I2C and
1165                  * update if necessary
1166                  */
1167                 if (download_cur_ver < download_new_ver) {
1168                         dev_dbg(dev, "%s - Update I2C dld from %d.%d to %d.%d\n",
1169                                 __func__,
1170                                 firmware_version->Ver_Major,
1171                                 firmware_version->Ver_Minor,
1172                                 fw_hdr->major_version,
1173                                 fw_hdr->minor_version);
1174
1175                         record = kmalloc(1, GFP_KERNEL);
1176                         if (!record) {
1177                                 kfree(firmware_version);
1178                                 kfree(rom_desc);
1179                                 kfree(ti_manuf_desc);
1180                                 return -ENOMEM;
1181                         }
1182                         /*
1183                          * In order to update the I2C firmware we must
1184                          * change the type 2 record to type 0xF2. This
1185                          * will force the UMP to come up in Boot Mode.
1186                          * Then while in boot mode, the driver will
1187                          * download the latest firmware (padded to
1188                          * 15.5k) into the UMP ram. Finally when the
1189                          * device comes back up in download mode the
1190                          * driver will cause the new firmware to be
1191                          * copied from the UMP Ram to I2C and the
1192                          * firmware will update the record type from
1193                          * 0xf2 to 0x02.
1194                          */
1195                         *record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1196
1197                         /*
1198                          * Change the I2C Firmware record type to
1199                          * 0xf2 to trigger an update
1200                          */
1201                         status = write_rom(serial, start_address,
1202                                         sizeof(*record), record);
1203                         if (status) {
1204                                 kfree(record);
1205                                 kfree(firmware_version);
1206                                 kfree(rom_desc);
1207                                 kfree(ti_manuf_desc);
1208                                 return status;
1209                         }
1210
1211                         /*
1212                          * verify the write -- must do this in order
1213                          * for write to complete before we do the
1214                          * hardware reset
1215                          */
1216                         status = read_rom(serial,
1217                                                 start_address,
1218                                                 sizeof(*record),
1219                                                 record);
1220                         if (status) {
1221                                 kfree(record);
1222                                 kfree(firmware_version);
1223                                 kfree(rom_desc);
1224                                 kfree(ti_manuf_desc);
1225                                 return status;
1226                         }
1227
1228                         if (*record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1229                                 dev_err(dev, "%s - error resetting device\n",
1230                                                 __func__);
1231                                 kfree(record);
1232                                 kfree(firmware_version);
1233                                 kfree(rom_desc);
1234                                 kfree(ti_manuf_desc);
1235                                 return -ENODEV;
1236                         }
1237
1238                         dev_dbg(dev, "%s - HARDWARE RESET\n", __func__);
1239
1240                         /* Reset UMP -- Back to BOOT MODE */
1241                         status = ti_vsend_sync(serial->serial->dev,
1242                                         UMPC_HARDWARE_RESET,
1243                                         0, 0, NULL, 0,
1244                                         TI_VSEND_TIMEOUT_DEFAULT);
1245
1246                         dev_dbg(dev, "%s - HARDWARE RESET return %d\n",
1247                                         __func__, status);
1248
1249                         /* return an error on purpose. */
1250                         kfree(record);
1251                         kfree(firmware_version);
1252                         kfree(rom_desc);
1253                         kfree(ti_manuf_desc);
1254                         return -ENODEV;
1255                 }
1256                 /* Same or newer fw version is already loaded */
1257                 serial->fw_version = download_cur_ver;
1258                 kfree(firmware_version);
1259         }
1260         /* Search for type 0xF2 record (firmware blank record) */
1261         else {
1262                 start_address = get_descriptor_addr(serial,
1263                                 I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc);
1264                 if (start_address != 0) {
1265 #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + \
1266                                 sizeof(struct ti_i2c_firmware_rec))
1267                         u8 *header;
1268                         u8 *vheader;
1269
1270                         header = kmalloc(HEADER_SIZE, GFP_KERNEL);
1271                         if (!header) {
1272                                 kfree(rom_desc);
1273                                 kfree(ti_manuf_desc);
1274                                 return -ENOMEM;
1275                         }
1276
1277                         vheader = kmalloc(HEADER_SIZE, GFP_KERNEL);
1278                         if (!vheader) {
1279                                 kfree(header);
1280                                 kfree(rom_desc);
1281                                 kfree(ti_manuf_desc);
1282                                 return -ENOMEM;
1283                         }
1284
1285                         dev_dbg(dev, "%s - Found Type BLANK FIRMWARE (Type F2) record\n",
1286                                         __func__);
1287
1288                         /*
1289                          * In order to update the I2C firmware we must change
1290                          * the type 2 record to type 0xF2. This will force the
1291                          * UMP to come up in Boot Mode.  Then while in boot
1292                          * mode, the driver will download the latest firmware
1293                          * (padded to 15.5k) into the UMP ram. Finally when the
1294                          * device comes back up in download mode the driver
1295                          * will cause the new firmware to be copied from the
1296                          * UMP Ram to I2C and the firmware will update the
1297                          * record type from 0xf2 to 0x02.
1298                          */
1299                         status = build_i2c_fw_hdr(header, fw);
1300                         if (status) {
1301                                 kfree(vheader);
1302                                 kfree(header);
1303                                 kfree(rom_desc);
1304                                 kfree(ti_manuf_desc);
1305                                 return -EINVAL;
1306                         }
1307
1308                         /*
1309                          * Update I2C with type 0xf2 record with correct
1310                          * size and checksum
1311                          */
1312                         status = write_rom(serial,
1313                                                 start_address,
1314                                                 HEADER_SIZE,
1315                                                 header);
1316                         if (status) {
1317                                 kfree(vheader);
1318                                 kfree(header);
1319                                 kfree(rom_desc);
1320                                 kfree(ti_manuf_desc);
1321                                 return -EINVAL;
1322                         }
1323
1324                         /*
1325                          * verify the write -- must do this in order for
1326                          * write to complete before we do the hardware reset
1327                          */
1328                         status = read_rom(serial, start_address,
1329                                                         HEADER_SIZE, vheader);
1330
1331                         if (status) {
1332                                 dev_dbg(dev, "%s - can't read header back\n",
1333                                                 __func__);
1334                                 kfree(vheader);
1335                                 kfree(header);
1336                                 kfree(rom_desc);
1337                                 kfree(ti_manuf_desc);
1338                                 return status;
1339                         }
1340                         if (memcmp(vheader, header, HEADER_SIZE)) {
1341                                 dev_dbg(dev, "%s - write download record failed\n",
1342                                                 __func__);
1343                                 kfree(vheader);
1344                                 kfree(header);
1345                                 kfree(rom_desc);
1346                                 kfree(ti_manuf_desc);
1347                                 return -EINVAL;
1348                         }
1349
1350                         kfree(vheader);
1351                         kfree(header);
1352
1353                         dev_dbg(dev, "%s - Start firmware update\n", __func__);
1354
1355                         /* Tell firmware to copy download image into I2C */
1356                         status = ti_vsend_sync(serial->serial->dev,
1357                                         UMPC_COPY_DNLD_TO_I2C,
1358                                         0, 0, NULL, 0,
1359                                         TI_VSEND_TIMEOUT_FW_DOWNLOAD);
1360
1361                         dev_dbg(dev, "%s - Update complete 0x%x\n", __func__,
1362                                         status);
1363                         if (status) {
1364                                 dev_err(dev,
1365                                         "%s - UMPC_COPY_DNLD_TO_I2C failed\n",
1366                                         __func__);
1367                                 kfree(rom_desc);
1368                                 kfree(ti_manuf_desc);
1369                                 return status;
1370                         }
1371                 }
1372         }
1373
1374         /* The device is running the download code */
1375         kfree(rom_desc);
1376         kfree(ti_manuf_desc);
1377         return 0;
1378 }
1379
1380 static int do_boot_mode(struct edgeport_serial *serial,
1381                 const struct firmware *fw)
1382 {
1383         struct device *dev = &serial->serial->interface->dev;
1384         int status = 0;
1385         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1386         struct edgeport_fw_hdr *fw_hdr = (struct edgeport_fw_hdr *)fw->data;
1387
1388         dev_dbg(dev, "%s - RUNNING IN BOOT MODE\n", __func__);
1389
1390         /* Configure the TI device so we can use the BULK pipes for download */
1391         status = config_boot_dev(serial->serial->dev);
1392         if (status)
1393                 return status;
1394
1395         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor)
1396                                                         != USB_VENDOR_ID_ION) {
1397                 dev_dbg(dev, "%s - VID = 0x%x\n", __func__,
1398                         le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1399                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1400                 goto stayinbootmode;
1401         }
1402
1403         /*
1404          * We have an ION device (I2c Must be programmed)
1405          * Determine I2C image type
1406          */
1407         if (i2c_type_bootmode(serial))
1408                 goto stayinbootmode;
1409
1410         /* Check for ION Vendor ID and that the I2C is valid */
1411         if (!check_i2c_image(serial)) {
1412                 struct ti_i2c_image_header *header;
1413                 int i;
1414                 u8 cs = 0;
1415                 u8 *buffer;
1416                 int buffer_size;
1417
1418                 /*
1419                  * Validate Hardware version number
1420                  * Read Manufacturing Descriptor from TI Based Edgeport
1421                  */
1422                 ti_manuf_desc = kmalloc(sizeof(*ti_manuf_desc), GFP_KERNEL);
1423                 if (!ti_manuf_desc)
1424                         return -ENOMEM;
1425
1426                 status = get_manuf_info(serial, (u8 *)ti_manuf_desc);
1427                 if (status) {
1428                         kfree(ti_manuf_desc);
1429                         goto stayinbootmode;
1430                 }
1431
1432                 /* Check for version 2 */
1433                 if (!ignore_cpu_rev && ti_cpu_rev(ti_manuf_desc) < 2) {
1434                         dev_dbg(dev, "%s - Wrong CPU Rev %d (Must be 2)\n",
1435                                 __func__, ti_cpu_rev(ti_manuf_desc));
1436                         kfree(ti_manuf_desc);
1437                         goto stayinbootmode;
1438                 }
1439
1440                 kfree(ti_manuf_desc);
1441
1442                 /*
1443                  * In order to update the I2C firmware we must change the type
1444                  * 2 record to type 0xF2. This will force the UMP to come up
1445                  * in Boot Mode.  Then while in boot mode, the driver will
1446                  * download the latest firmware (padded to 15.5k) into the
1447                  * UMP ram. Finally when the device comes back up in download
1448                  * mode the driver will cause the new firmware to be copied
1449                  * from the UMP Ram to I2C and the firmware will update the
1450                  * record type from 0xf2 to 0x02.
1451                  *
1452                  * Do we really have to copy the whole firmware image,
1453                  * or could we do this in place!
1454                  */
1455
1456                 /* Allocate a 15.5k buffer + 3 byte header */
1457                 buffer_size = (((1024 * 16) - 512) +
1458                                         sizeof(struct ti_i2c_image_header));
1459                 buffer = kmalloc(buffer_size, GFP_KERNEL);
1460                 if (!buffer)
1461                         return -ENOMEM;
1462
1463                 /* Initialize the buffer to 0xff (pad the buffer) */
1464                 memset(buffer, 0xff, buffer_size);
1465                 memcpy(buffer, &fw->data[4], fw->size - 4);
1466
1467                 for (i = sizeof(struct ti_i2c_image_header);
1468                                 i < buffer_size; i++) {
1469                         cs = (u8)(cs + buffer[i]);
1470                 }
1471
1472                 header = (struct ti_i2c_image_header *)buffer;
1473
1474                 /* update length and checksum after padding */
1475                 header->Length = cpu_to_le16((u16)(buffer_size -
1476                                         sizeof(struct ti_i2c_image_header)));
1477                 header->CheckSum = cs;
1478
1479                 /* Download the operational code  */
1480                 dev_dbg(dev, "%s - Downloading operational code image version %d.%d (TI UMP)\n",
1481                                 __func__,
1482                                 fw_hdr->major_version, fw_hdr->minor_version);
1483                 status = download_code(serial, buffer, buffer_size);
1484
1485                 kfree(buffer);
1486
1487                 if (status) {
1488                         dev_dbg(dev, "%s - Error downloading operational code image\n", __func__);
1489                         return status;
1490                 }
1491
1492                 /* Device will reboot */
1493                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1494
1495                 dev_dbg(dev, "%s - Download successful -- Device rebooting...\n", __func__);
1496
1497                 return 1;
1498         }
1499
1500 stayinbootmode:
1501         /* Eprom is invalid or blank stay in boot mode */
1502         dev_dbg(dev, "%s - STAYING IN BOOT MODE\n", __func__);
1503         serial->product_info.TiMode = TI_MODE_BOOT;
1504
1505         return 1;
1506 }
1507
1508 static int ti_do_config(struct edgeport_port *port, int feature, int on)
1509 {
1510         on = !!on;      /* 1 or 0 not bitmask */
1511
1512         return send_port_cmd(port->port, feature, on, NULL, 0);
1513 }
1514
1515 static int restore_mcr(struct edgeport_port *port, u8 mcr)
1516 {
1517         int status = 0;
1518
1519         dev_dbg(&port->port->dev, "%s - %x\n", __func__, mcr);
1520
1521         status = ti_do_config(port, UMPC_SET_CLR_DTR, mcr & MCR_DTR);
1522         if (status)
1523                 return status;
1524         status = ti_do_config(port, UMPC_SET_CLR_RTS, mcr & MCR_RTS);
1525         if (status)
1526                 return status;
1527         return ti_do_config(port, UMPC_SET_CLR_LOOPBACK, mcr & MCR_LOOPBACK);
1528 }
1529
1530 /* Convert TI LSR to standard UART flags */
1531 static u8 map_line_status(u8 ti_lsr)
1532 {
1533         u8 lsr = 0;
1534
1535 #define MAP_FLAG(flagUmp, flagUart)    \
1536         if (ti_lsr & flagUmp) \
1537                 lsr |= flagUart;
1538
1539         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1540         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1541         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1542         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1543         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* rx data available */
1544         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* tx hold reg empty */
1545
1546 #undef MAP_FLAG
1547
1548         return lsr;
1549 }
1550
1551 static void handle_new_msr(struct edgeport_port *edge_port, u8 msr)
1552 {
1553         struct async_icount *icount;
1554         struct tty_struct *tty;
1555
1556         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, msr);
1557
1558         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR |
1559                         EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1560                 icount = &edge_port->port->icount;
1561
1562                 /* update input line counters */
1563                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1564                         icount->cts++;
1565                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1566                         icount->dsr++;
1567                 if (msr & EDGEPORT_MSR_DELTA_CD)
1568                         icount->dcd++;
1569                 if (msr & EDGEPORT_MSR_DELTA_RI)
1570                         icount->rng++;
1571                 wake_up_interruptible(&edge_port->port->port.delta_msr_wait);
1572         }
1573
1574         /* Save the new modem status */
1575         edge_port->shadow_msr = msr & 0xf0;
1576
1577         tty = tty_port_tty_get(&edge_port->port->port);
1578         /* handle CTS flow control */
1579         if (tty && C_CRTSCTS(tty)) {
1580                 if (msr & EDGEPORT_MSR_CTS)
1581                         tty_wakeup(tty);
1582         }
1583         tty_kref_put(tty);
1584 }
1585
1586 static void handle_new_lsr(struct edgeport_port *edge_port, int lsr_data,
1587                                                         u8 lsr, u8 data)
1588 {
1589         struct async_icount *icount;
1590         u8 new_lsr = (u8)(lsr & (u8)(LSR_OVER_ERR | LSR_PAR_ERR |
1591                                                 LSR_FRM_ERR | LSR_BREAK));
1592
1593         dev_dbg(&edge_port->port->dev, "%s - %02x\n", __func__, new_lsr);
1594
1595         edge_port->shadow_lsr = lsr;
1596
1597         if (new_lsr & LSR_BREAK)
1598                 /*
1599                  * Parity and Framing errors only count if they
1600                  * occur exclusive of a break being received.
1601                  */
1602                 new_lsr &= (u8)(LSR_OVER_ERR | LSR_BREAK);
1603
1604         /* Place LSR data byte into Rx buffer */
1605         if (lsr_data)
1606                 edge_tty_recv(edge_port->port, &data, 1);
1607
1608         /* update input line counters */
1609         icount = &edge_port->port->icount;
1610         if (new_lsr & LSR_BREAK)
1611                 icount->brk++;
1612         if (new_lsr & LSR_OVER_ERR)
1613                 icount->overrun++;
1614         if (new_lsr & LSR_PAR_ERR)
1615                 icount->parity++;
1616         if (new_lsr & LSR_FRM_ERR)
1617                 icount->frame++;
1618 }
1619
1620 static void edge_interrupt_callback(struct urb *urb)
1621 {
1622         struct edgeport_serial *edge_serial = urb->context;
1623         struct usb_serial_port *port;
1624         struct edgeport_port *edge_port;
1625         struct device *dev;
1626         unsigned char *data = urb->transfer_buffer;
1627         int length = urb->actual_length;
1628         int port_number;
1629         int function;
1630         int retval;
1631         u8 lsr;
1632         u8 msr;
1633         int status = urb->status;
1634
1635         switch (status) {
1636         case 0:
1637                 /* success */
1638                 break;
1639         case -ECONNRESET:
1640         case -ENOENT:
1641         case -ESHUTDOWN:
1642                 /* this urb is terminated, clean up */
1643                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1644                     __func__, status);
1645                 return;
1646         default:
1647                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1648                         "%d\n", __func__, status);
1649                 goto exit;
1650         }
1651
1652         if (!length) {
1653                 dev_dbg(&urb->dev->dev, "%s - no data in urb\n", __func__);
1654                 goto exit;
1655         }
1656
1657         dev = &edge_serial->serial->dev->dev;
1658         usb_serial_debug_data(dev, __func__, length, data);
1659
1660         if (length != 2) {
1661                 dev_dbg(dev, "%s - expecting packet of size 2, got %d\n", __func__, length);
1662                 goto exit;
1663         }
1664
1665         port_number = TIUMP_GET_PORT_FROM_CODE(data[0]);
1666         function    = TIUMP_GET_FUNC_FROM_CODE(data[0]);
1667         dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__,
1668                 port_number, function, data[1]);
1669
1670         if (port_number >= edge_serial->serial->num_ports) {
1671                 dev_err(dev, "bad port number %d\n", port_number);
1672                 goto exit;
1673         }
1674
1675         port = edge_serial->serial->port[port_number];
1676         edge_port = usb_get_serial_port_data(port);
1677         if (!edge_port) {
1678                 dev_dbg(dev, "%s - edge_port not found\n", __func__);
1679                 return;
1680         }
1681         switch (function) {
1682         case TIUMP_INTERRUPT_CODE_LSR:
1683                 lsr = map_line_status(data[1]);
1684                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1685                         /*
1686                          * Save the LSR event for bulk read completion routine
1687                          */
1688                         dev_dbg(dev, "%s - LSR Event Port %u LSR Status = %02x\n",
1689                                 __func__, port_number, lsr);
1690                         edge_port->lsr_event = 1;
1691                         edge_port->lsr_mask = lsr;
1692                 } else {
1693                         dev_dbg(dev, "%s - ===== Port %d LSR Status = %02x ======\n",
1694                                 __func__, port_number, lsr);
1695                         handle_new_lsr(edge_port, 0, lsr, 0);
1696                 }
1697                 break;
1698
1699         case TIUMP_INTERRUPT_CODE_MSR:  /* MSR */
1700                 /* Copy MSR from UMP */
1701                 msr = data[1];
1702                 dev_dbg(dev, "%s - ===== Port %u MSR Status = %02x ======\n",
1703                         __func__, port_number, msr);
1704                 handle_new_msr(edge_port, msr);
1705                 break;
1706
1707         default:
1708                 dev_err(&urb->dev->dev,
1709                         "%s - Unknown Interrupt code from UMP %x\n",
1710                         __func__, data[1]);
1711                 break;
1712
1713         }
1714
1715 exit:
1716         retval = usb_submit_urb(urb, GFP_ATOMIC);
1717         if (retval)
1718                 dev_err(&urb->dev->dev,
1719                         "%s - usb_submit_urb failed with result %d\n",
1720                          __func__, retval);
1721 }
1722
1723 static void edge_bulk_in_callback(struct urb *urb)
1724 {
1725         struct edgeport_port *edge_port = urb->context;
1726         struct device *dev = &edge_port->port->dev;
1727         unsigned char *data = urb->transfer_buffer;
1728         unsigned long flags;
1729         int retval = 0;
1730         int port_number;
1731         int status = urb->status;
1732
1733         switch (status) {
1734         case 0:
1735                 /* success */
1736                 break;
1737         case -ECONNRESET:
1738         case -ENOENT:
1739         case -ESHUTDOWN:
1740                 /* this urb is terminated, clean up */
1741                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
1742                 return;
1743         default:
1744                 dev_err(&urb->dev->dev, "%s - nonzero read bulk status received: %d\n", __func__, status);
1745         }
1746
1747         if (status == -EPIPE)
1748                 goto exit;
1749
1750         if (status) {
1751                 dev_err(&urb->dev->dev, "%s - stopping read!\n", __func__);
1752                 return;
1753         }
1754
1755         port_number = edge_port->port->port_number;
1756
1757         if (urb->actual_length > 0 && edge_port->lsr_event) {
1758                 edge_port->lsr_event = 0;
1759                 dev_dbg(dev, "%s ===== Port %u LSR Status = %02x, Data = %02x ======\n",
1760                         __func__, port_number, edge_port->lsr_mask, *data);
1761                 handle_new_lsr(edge_port, 1, edge_port->lsr_mask, *data);
1762                 /* Adjust buffer length/pointer */
1763                 --urb->actual_length;
1764                 ++data;
1765         }
1766
1767         if (urb->actual_length) {
1768                 usb_serial_debug_data(dev, __func__, urb->actual_length, data);
1769                 if (edge_port->close_pending)
1770                         dev_dbg(dev, "%s - close pending, dropping data on the floor\n",
1771                                                                 __func__);
1772                 else
1773                         edge_tty_recv(edge_port->port, data,
1774                                         urb->actual_length);
1775                 edge_port->port->icount.rx += urb->actual_length;
1776         }
1777
1778 exit:
1779         /* continue read unless stopped */
1780         spin_lock_irqsave(&edge_port->ep_lock, flags);
1781         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
1782                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1783         else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING)
1784                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1785
1786         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1787         if (retval)
1788                 dev_err(dev, "%s - usb_submit_urb failed with result %d\n", __func__, retval);
1789 }
1790
1791 static void edge_tty_recv(struct usb_serial_port *port, unsigned char *data,
1792                 int length)
1793 {
1794         int queued;
1795
1796         queued = tty_insert_flip_string(&port->port, data, length);
1797         if (queued < length)
1798                 dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1799                         __func__, length - queued);
1800         tty_flip_buffer_push(&port->port);
1801 }
1802
1803 static void edge_bulk_out_callback(struct urb *urb)
1804 {
1805         struct usb_serial_port *port = urb->context;
1806         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1807         int status = urb->status;
1808         struct tty_struct *tty;
1809
1810         edge_port->ep_write_urb_in_use = 0;
1811
1812         switch (status) {
1813         case 0:
1814                 /* success */
1815                 break;
1816         case -ECONNRESET:
1817         case -ENOENT:
1818         case -ESHUTDOWN:
1819                 /* this urb is terminated, clean up */
1820                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
1821                     __func__, status);
1822                 return;
1823         default:
1824                 dev_err_console(port, "%s - nonzero write bulk status "
1825                         "received: %d\n", __func__, status);
1826         }
1827
1828         /* send any buffered data */
1829         tty = tty_port_tty_get(&port->port);
1830         edge_send(port, tty);
1831         tty_kref_put(tty);
1832 }
1833
1834 static int edge_open(struct tty_struct *tty, struct usb_serial_port *port)
1835 {
1836         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1837         struct edgeport_serial *edge_serial;
1838         struct usb_device *dev;
1839         struct urb *urb;
1840         int status;
1841         u16 open_settings;
1842         u8 transaction_timeout;
1843
1844         if (edge_port == NULL)
1845                 return -ENODEV;
1846
1847         dev = port->serial->dev;
1848
1849         /* turn off loopback */
1850         status = ti_do_config(edge_port, UMPC_SET_CLR_LOOPBACK, 0);
1851         if (status) {
1852                 dev_err(&port->dev,
1853                                 "%s - cannot send clear loopback command, %d\n",
1854                         __func__, status);
1855                 return status;
1856         }
1857
1858         /* set up the port settings */
1859         if (tty)
1860                 edge_set_termios(tty, port, &tty->termios);
1861
1862         /* open up the port */
1863
1864         /* milliseconds to timeout for DMA transfer */
1865         transaction_timeout = 2;
1866
1867         edge_port->ump_read_timeout =
1868                                 max(20, ((transaction_timeout * 3) / 2));
1869
1870         /* milliseconds to timeout for DMA transfer */
1871         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1872                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1873                              (transaction_timeout << 2));
1874
1875         dev_dbg(&port->dev, "%s - Sending UMPC_OPEN_PORT\n", __func__);
1876
1877         /* Tell TI to open and start the port */
1878         status = send_port_cmd(port, UMPC_OPEN_PORT, open_settings, NULL, 0);
1879         if (status) {
1880                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
1881                                                         __func__, status);
1882                 return status;
1883         }
1884
1885         /* Start the DMA? */
1886         status = send_port_cmd(port, UMPC_START_PORT, 0, NULL, 0);
1887         if (status) {
1888                 dev_err(&port->dev, "%s - cannot send start DMA command, %d\n",
1889                                                         __func__, status);
1890                 return status;
1891         }
1892
1893         /* Clear TX and RX buffers in UMP */
1894         status = purge_port(port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
1895         if (status) {
1896                 dev_err(&port->dev,
1897                         "%s - cannot send clear buffers command, %d\n",
1898                         __func__, status);
1899                 return status;
1900         }
1901
1902         /* Read Initial MSR */
1903         status = read_port_cmd(port, UMPC_READ_MSR, 0, &edge_port->shadow_msr, 1);
1904         if (status) {
1905                 dev_err(&port->dev, "%s - cannot send read MSR command, %d\n",
1906                                                         __func__, status);
1907                 return status;
1908         }
1909
1910         dev_dbg(&port->dev, "ShadowMSR 0x%X\n", edge_port->shadow_msr);
1911
1912         /* Set Initial MCR */
1913         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
1914         dev_dbg(&port->dev, "ShadowMCR 0x%X\n", edge_port->shadow_mcr);
1915
1916         edge_serial = edge_port->edge_serial;
1917         if (mutex_lock_interruptible(&edge_serial->es_lock))
1918                 return -ERESTARTSYS;
1919         if (edge_serial->num_ports_open == 0) {
1920                 /* we are the first port to open, post the interrupt urb */
1921                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
1922                 urb->context = edge_serial;
1923                 status = usb_submit_urb(urb, GFP_KERNEL);
1924                 if (status) {
1925                         dev_err(&port->dev,
1926                                 "%s - usb_submit_urb failed with value %d\n",
1927                                         __func__, status);
1928                         goto release_es_lock;
1929                 }
1930         }
1931
1932         /*
1933          * reset the data toggle on the bulk endpoints to work around bug in
1934          * host controllers where things get out of sync some times
1935          */
1936         usb_clear_halt(dev, port->write_urb->pipe);
1937         usb_clear_halt(dev, port->read_urb->pipe);
1938
1939         /* start up our bulk read urb */
1940         urb = port->read_urb;
1941         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
1942         urb->context = edge_port;
1943         status = usb_submit_urb(urb, GFP_KERNEL);
1944         if (status) {
1945                 dev_err(&port->dev,
1946                         "%s - read bulk usb_submit_urb failed with value %d\n",
1947                                 __func__, status);
1948                 goto unlink_int_urb;
1949         }
1950
1951         ++edge_serial->num_ports_open;
1952
1953         goto release_es_lock;
1954
1955 unlink_int_urb:
1956         if (edge_port->edge_serial->num_ports_open == 0)
1957                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1958 release_es_lock:
1959         mutex_unlock(&edge_serial->es_lock);
1960         return status;
1961 }
1962
1963 static void edge_close(struct usb_serial_port *port)
1964 {
1965         struct edgeport_serial *edge_serial;
1966         struct edgeport_port *edge_port;
1967         unsigned long flags;
1968
1969         edge_serial = usb_get_serial_data(port->serial);
1970         edge_port = usb_get_serial_port_data(port);
1971         if (edge_serial == NULL || edge_port == NULL)
1972                 return;
1973
1974         /*
1975          * The bulkreadcompletion routine will check
1976          * this flag and dump add read data
1977          */
1978         edge_port->close_pending = 1;
1979
1980         usb_kill_urb(port->read_urb);
1981         usb_kill_urb(port->write_urb);
1982         edge_port->ep_write_urb_in_use = 0;
1983         spin_lock_irqsave(&edge_port->ep_lock, flags);
1984         kfifo_reset_out(&port->write_fifo);
1985         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
1986
1987         dev_dbg(&port->dev, "%s - send umpc_close_port\n", __func__);
1988         send_port_cmd(port, UMPC_CLOSE_PORT, 0, NULL, 0);
1989
1990         mutex_lock(&edge_serial->es_lock);
1991         --edge_port->edge_serial->num_ports_open;
1992         if (edge_port->edge_serial->num_ports_open <= 0) {
1993                 /* last port is now closed, let's shut down our interrupt urb */
1994                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
1995                 edge_port->edge_serial->num_ports_open = 0;
1996         }
1997         mutex_unlock(&edge_serial->es_lock);
1998         edge_port->close_pending = 0;
1999 }
2000
2001 static int edge_write(struct tty_struct *tty, struct usb_serial_port *port,
2002                                 const unsigned char *data, int count)
2003 {
2004         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2005
2006         if (count == 0) {
2007                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
2008                 return 0;
2009         }
2010
2011         if (edge_port == NULL)
2012                 return -ENODEV;
2013         if (edge_port->close_pending == 1)
2014                 return -ENODEV;
2015
2016         count = kfifo_in_locked(&port->write_fifo, data, count,
2017                                                         &edge_port->ep_lock);
2018         edge_send(port, tty);
2019
2020         return count;
2021 }
2022
2023 static void edge_send(struct usb_serial_port *port, struct tty_struct *tty)
2024 {
2025         int count, result;
2026         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2027         unsigned long flags;
2028
2029         spin_lock_irqsave(&edge_port->ep_lock, flags);
2030
2031         if (edge_port->ep_write_urb_in_use) {
2032                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2033                 return;
2034         }
2035
2036         count = kfifo_out(&port->write_fifo,
2037                                 port->write_urb->transfer_buffer,
2038                                 port->bulk_out_size);
2039
2040         if (count == 0) {
2041                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2042                 return;
2043         }
2044
2045         edge_port->ep_write_urb_in_use = 1;
2046
2047         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2048
2049         usb_serial_debug_data(&port->dev, __func__, count, port->write_urb->transfer_buffer);
2050
2051         /* set up our urb */
2052         port->write_urb->transfer_buffer_length = count;
2053
2054         /* send the data out the bulk port */
2055         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2056         if (result) {
2057                 dev_err_console(port,
2058                         "%s - failed submitting write urb, error %d\n",
2059                                 __func__, result);
2060                 edge_port->ep_write_urb_in_use = 0;
2061                 /* TODO: reschedule edge_send */
2062         } else
2063                 edge_port->port->icount.tx += count;
2064
2065         /*
2066          * wakeup any process waiting for writes to complete
2067          * there is now more room in the buffer for new writes
2068          */
2069         if (tty)
2070                 tty_wakeup(tty);
2071 }
2072
2073 static unsigned int edge_write_room(struct tty_struct *tty)
2074 {
2075         struct usb_serial_port *port = tty->driver_data;
2076         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2077         unsigned int room;
2078         unsigned long flags;
2079
2080         if (edge_port == NULL)
2081                 return 0;
2082         if (edge_port->close_pending == 1)
2083                 return 0;
2084
2085         spin_lock_irqsave(&edge_port->ep_lock, flags);
2086         room = kfifo_avail(&port->write_fifo);
2087         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2088
2089         dev_dbg(&port->dev, "%s - returns %u\n", __func__, room);
2090         return room;
2091 }
2092
2093 static unsigned int edge_chars_in_buffer(struct tty_struct *tty)
2094 {
2095         struct usb_serial_port *port = tty->driver_data;
2096         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2097         unsigned int chars;
2098         unsigned long flags;
2099         if (edge_port == NULL)
2100                 return 0;
2101
2102         spin_lock_irqsave(&edge_port->ep_lock, flags);
2103         chars = kfifo_len(&port->write_fifo);
2104         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2105
2106         dev_dbg(&port->dev, "%s - returns %u\n", __func__, chars);
2107         return chars;
2108 }
2109
2110 static bool edge_tx_empty(struct usb_serial_port *port)
2111 {
2112         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2113         int ret;
2114
2115         ret = tx_active(edge_port);
2116         if (ret > 0)
2117                 return false;
2118
2119         return true;
2120 }
2121
2122 static void edge_throttle(struct tty_struct *tty)
2123 {
2124         struct usb_serial_port *port = tty->driver_data;
2125         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2126         int status;
2127
2128         if (edge_port == NULL)
2129                 return;
2130
2131         /* if we are implementing XON/XOFF, send the stop character */
2132         if (I_IXOFF(tty)) {
2133                 unsigned char stop_char = STOP_CHAR(tty);
2134                 status = edge_write(tty, port, &stop_char, 1);
2135                 if (status <= 0) {
2136                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __func__, status);
2137                 }
2138         }
2139
2140         /*
2141          * if we are implementing RTS/CTS, stop reads
2142          * and the Edgeport will clear the RTS line
2143          */
2144         if (C_CRTSCTS(tty))
2145                 stop_read(edge_port);
2146
2147 }
2148
2149 static void edge_unthrottle(struct tty_struct *tty)
2150 {
2151         struct usb_serial_port *port = tty->driver_data;
2152         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2153         int status;
2154
2155         if (edge_port == NULL)
2156                 return;
2157
2158         /* if we are implementing XON/XOFF, send the start character */
2159         if (I_IXOFF(tty)) {
2160                 unsigned char start_char = START_CHAR(tty);
2161                 status = edge_write(tty, port, &start_char, 1);
2162                 if (status <= 0) {
2163                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __func__, status);
2164                 }
2165         }
2166         /*
2167          * if we are implementing RTS/CTS, restart reads
2168          * are the Edgeport will assert the RTS line
2169          */
2170         if (C_CRTSCTS(tty)) {
2171                 status = restart_read(edge_port);
2172                 if (status)
2173                         dev_err(&port->dev,
2174                                 "%s - read bulk usb_submit_urb failed: %d\n",
2175                                                         __func__, status);
2176         }
2177
2178 }
2179
2180 static void stop_read(struct edgeport_port *edge_port)
2181 {
2182         unsigned long flags;
2183
2184         spin_lock_irqsave(&edge_port->ep_lock, flags);
2185
2186         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2187                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2188         edge_port->shadow_mcr &= ~MCR_RTS;
2189
2190         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2191 }
2192
2193 static int restart_read(struct edgeport_port *edge_port)
2194 {
2195         struct urb *urb;
2196         int status = 0;
2197         unsigned long flags;
2198
2199         spin_lock_irqsave(&edge_port->ep_lock, flags);
2200
2201         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2202                 urb = edge_port->port->read_urb;
2203                 status = usb_submit_urb(urb, GFP_ATOMIC);
2204         }
2205         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2206         edge_port->shadow_mcr |= MCR_RTS;
2207
2208         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2209
2210         return status;
2211 }
2212
2213 static void change_port_settings(struct tty_struct *tty,
2214                 struct edgeport_port *edge_port, const struct ktermios *old_termios)
2215 {
2216         struct device *dev = &edge_port->port->dev;
2217         struct ump_uart_config *config;
2218         int baud;
2219         unsigned cflag;
2220         int status;
2221
2222         config = kmalloc (sizeof (*config), GFP_KERNEL);
2223         if (!config) {
2224                 tty->termios = *old_termios;
2225                 return;
2226         }
2227
2228         cflag = tty->termios.c_cflag;
2229
2230         config->wFlags = 0;
2231
2232         /* These flags must be set */
2233         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2234         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2235         config->bUartMode = (u8)(edge_port->bUartMode);
2236
2237         switch (cflag & CSIZE) {
2238         case CS5:
2239                     config->bDataBits = UMP_UART_CHAR5BITS;
2240                     dev_dbg(dev, "%s - data bits = 5\n", __func__);
2241                     break;
2242         case CS6:
2243                     config->bDataBits = UMP_UART_CHAR6BITS;
2244                     dev_dbg(dev, "%s - data bits = 6\n", __func__);
2245                     break;
2246         case CS7:
2247                     config->bDataBits = UMP_UART_CHAR7BITS;
2248                     dev_dbg(dev, "%s - data bits = 7\n", __func__);
2249                     break;
2250         default:
2251         case CS8:
2252                     config->bDataBits = UMP_UART_CHAR8BITS;
2253                     dev_dbg(dev, "%s - data bits = 8\n", __func__);
2254                             break;
2255         }
2256
2257         if (cflag & PARENB) {
2258                 if (cflag & PARODD) {
2259                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2260                         config->bParity = UMP_UART_ODDPARITY;
2261                         dev_dbg(dev, "%s - parity = odd\n", __func__);
2262                 } else {
2263                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2264                         config->bParity = UMP_UART_EVENPARITY;
2265                         dev_dbg(dev, "%s - parity = even\n", __func__);
2266                 }
2267         } else {
2268                 config->bParity = UMP_UART_NOPARITY;
2269                 dev_dbg(dev, "%s - parity = none\n", __func__);
2270         }
2271
2272         if (cflag & CSTOPB) {
2273                 config->bStopBits = UMP_UART_STOPBIT2;
2274                 dev_dbg(dev, "%s - stop bits = 2\n", __func__);
2275         } else {
2276                 config->bStopBits = UMP_UART_STOPBIT1;
2277                 dev_dbg(dev, "%s - stop bits = 1\n", __func__);
2278         }
2279
2280         /* figure out the flow control settings */
2281         if (cflag & CRTSCTS) {
2282                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2283                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2284                 dev_dbg(dev, "%s - RTS/CTS is enabled\n", __func__);
2285         } else {
2286                 dev_dbg(dev, "%s - RTS/CTS is disabled\n", __func__);
2287                 restart_read(edge_port);
2288         }
2289
2290         /*
2291          * if we are implementing XON/XOFF, set the start and stop
2292          * character in the device
2293          */
2294         config->cXon  = START_CHAR(tty);
2295         config->cXoff = STOP_CHAR(tty);
2296
2297         /* if we are implementing INBOUND XON/XOFF */
2298         if (I_IXOFF(tty)) {
2299                 config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2300                 dev_dbg(dev, "%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2301                         __func__, config->cXon, config->cXoff);
2302         } else
2303                 dev_dbg(dev, "%s - INBOUND XON/XOFF is disabled\n", __func__);
2304
2305         /* if we are implementing OUTBOUND XON/XOFF */
2306         if (I_IXON(tty)) {
2307                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2308                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x\n",
2309                         __func__, config->cXon, config->cXoff);
2310         } else
2311                 dev_dbg(dev, "%s - OUTBOUND XON/XOFF is disabled\n", __func__);
2312
2313         tty->termios.c_cflag &= ~CMSPAR;
2314
2315         /* Round the baud rate */
2316         baud = tty_get_baud_rate(tty);
2317         if (!baud) {
2318                 /* pick a default, any default... */
2319                 baud = 9600;
2320         } else {
2321                 /* Avoid a zero divisor. */
2322                 baud = min(baud, 461550);
2323                 tty_encode_baud_rate(tty, baud, baud);
2324         }
2325
2326         edge_port->baud_rate = baud;
2327         config->wBaudRate = (u16)((461550L + baud/2) / baud);
2328
2329         /* FIXME: Recompute actual baud from divisor here */
2330
2331         dev_dbg(dev, "%s - baud rate = %d, wBaudRate = %d\n", __func__, baud, config->wBaudRate);
2332
2333         dev_dbg(dev, "wBaudRate:   %d\n", (int)(461550L / config->wBaudRate));
2334         dev_dbg(dev, "wFlags:    0x%x\n", config->wFlags);
2335         dev_dbg(dev, "bDataBits:   %d\n", config->bDataBits);
2336         dev_dbg(dev, "bParity:     %d\n", config->bParity);
2337         dev_dbg(dev, "bStopBits:   %d\n", config->bStopBits);
2338         dev_dbg(dev, "cXon:        %d\n", config->cXon);
2339         dev_dbg(dev, "cXoff:       %d\n", config->cXoff);
2340         dev_dbg(dev, "bUartMode:   %d\n", config->bUartMode);
2341
2342         /* move the word values into big endian mode */
2343         cpu_to_be16s(&config->wFlags);
2344         cpu_to_be16s(&config->wBaudRate);
2345
2346         status = send_port_cmd(edge_port->port, UMPC_SET_CONFIG, 0, config,
2347                         sizeof(*config));
2348         if (status)
2349                 dev_dbg(dev, "%s - error %d when trying to write config to device\n",
2350                         __func__, status);
2351         kfree(config);
2352 }
2353
2354 static void edge_set_termios(struct tty_struct *tty,
2355                              struct usb_serial_port *port,
2356                              const struct ktermios *old_termios)
2357 {
2358         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2359
2360         if (edge_port == NULL)
2361                 return;
2362         /* change the port settings to the new ones specified */
2363         change_port_settings(tty, edge_port, old_termios);
2364 }
2365
2366 static int edge_tiocmset(struct tty_struct *tty,
2367                                         unsigned int set, unsigned int clear)
2368 {
2369         struct usb_serial_port *port = tty->driver_data;
2370         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2371         unsigned int mcr;
2372         unsigned long flags;
2373
2374         spin_lock_irqsave(&edge_port->ep_lock, flags);
2375         mcr = edge_port->shadow_mcr;
2376         if (set & TIOCM_RTS)
2377                 mcr |= MCR_RTS;
2378         if (set & TIOCM_DTR)
2379                 mcr |= MCR_DTR;
2380         if (set & TIOCM_LOOP)
2381                 mcr |= MCR_LOOPBACK;
2382
2383         if (clear & TIOCM_RTS)
2384                 mcr &= ~MCR_RTS;
2385         if (clear & TIOCM_DTR)
2386                 mcr &= ~MCR_DTR;
2387         if (clear & TIOCM_LOOP)
2388                 mcr &= ~MCR_LOOPBACK;
2389
2390         edge_port->shadow_mcr = mcr;
2391         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2392
2393         restore_mcr(edge_port, mcr);
2394         return 0;
2395 }
2396
2397 static int edge_tiocmget(struct tty_struct *tty)
2398 {
2399         struct usb_serial_port *port = tty->driver_data;
2400         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2401         unsigned int result = 0;
2402         unsigned int msr;
2403         unsigned int mcr;
2404         unsigned long flags;
2405
2406         spin_lock_irqsave(&edge_port->ep_lock, flags);
2407
2408         msr = edge_port->shadow_msr;
2409         mcr = edge_port->shadow_mcr;
2410         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2411                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2412                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2413                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2414                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2415                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2416
2417
2418         dev_dbg(&port->dev, "%s -- %x\n", __func__, result);
2419         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2420
2421         return result;
2422 }
2423
2424 static int edge_break(struct tty_struct *tty, int break_state)
2425 {
2426         struct usb_serial_port *port = tty->driver_data;
2427         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2428         int status;
2429         int bv = 0;     /* Off */
2430
2431         if (break_state == -1)
2432                 bv = 1; /* On */
2433
2434         status = ti_do_config(edge_port, UMPC_SET_CLR_BREAK, bv);
2435         if (status) {
2436                 dev_dbg(&port->dev, "%s - error %d sending break set/clear command.\n",
2437                         __func__, status);
2438                 return status;
2439         }
2440
2441         return 0;
2442 }
2443
2444 static void edge_heartbeat_schedule(struct edgeport_serial *edge_serial)
2445 {
2446         if (!edge_serial->use_heartbeat)
2447                 return;
2448
2449         schedule_delayed_work(&edge_serial->heartbeat_work,
2450                         FW_HEARTBEAT_SECS * HZ);
2451 }
2452
2453 static void edge_heartbeat_work(struct work_struct *work)
2454 {
2455         struct edgeport_serial *serial;
2456         struct ti_i2c_desc *rom_desc;
2457
2458         serial = container_of(work, struct edgeport_serial,
2459                         heartbeat_work.work);
2460
2461         rom_desc = kmalloc(sizeof(*rom_desc), GFP_KERNEL);
2462
2463         /* Descriptor address request is enough to reset the firmware timer */
2464         if (!rom_desc || !get_descriptor_addr(serial, I2C_DESC_TYPE_ION,
2465                         rom_desc)) {
2466                 dev_err(&serial->serial->interface->dev,
2467                                 "%s - Incomplete heartbeat\n", __func__);
2468         }
2469         kfree(rom_desc);
2470
2471         edge_heartbeat_schedule(serial);
2472 }
2473
2474 static int edge_calc_num_ports(struct usb_serial *serial,
2475                                 struct usb_serial_endpoints *epds)
2476 {
2477         struct device *dev = &serial->interface->dev;
2478         unsigned char num_ports = serial->type->num_ports;
2479
2480         /* Make sure we have the required endpoints when in download mode. */
2481         if (serial->interface->cur_altsetting->desc.bNumEndpoints > 1) {
2482                 if (epds->num_bulk_in < num_ports ||
2483                                 epds->num_bulk_out < num_ports ||
2484                                 epds->num_interrupt_in < 1) {
2485                         dev_err(dev, "required endpoints missing\n");
2486                         return -ENODEV;
2487                 }
2488         }
2489
2490         return num_ports;
2491 }
2492
2493 static int edge_startup(struct usb_serial *serial)
2494 {
2495         struct edgeport_serial *edge_serial;
2496         int status;
2497         u16 product_id;
2498
2499         /* create our private serial structure */
2500         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2501         if (!edge_serial)
2502                 return -ENOMEM;
2503
2504         mutex_init(&edge_serial->es_lock);
2505         edge_serial->serial = serial;
2506         INIT_DELAYED_WORK(&edge_serial->heartbeat_work, edge_heartbeat_work);
2507         usb_set_serial_data(serial, edge_serial);
2508
2509         status = download_fw(edge_serial);
2510         if (status < 0) {
2511                 kfree(edge_serial);
2512                 return status;
2513         }
2514
2515         if (status > 0)
2516                 return 1;       /* bind but do not register any ports */
2517
2518         product_id = le16_to_cpu(
2519                         edge_serial->serial->dev->descriptor.idProduct);
2520
2521         /* Currently only the EP/416 models require heartbeat support */
2522         if (edge_serial->fw_version > FW_HEARTBEAT_VERSION_CUTOFF) {
2523                 if (product_id == ION_DEVICE_ID_TI_EDGEPORT_416 ||
2524                         product_id == ION_DEVICE_ID_TI_EDGEPORT_416B) {
2525                         edge_serial->use_heartbeat = true;
2526                 }
2527         }
2528
2529         edge_heartbeat_schedule(edge_serial);
2530
2531         return 0;
2532 }
2533
2534 static void edge_disconnect(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 }
2540
2541 static void edge_release(struct usb_serial *serial)
2542 {
2543         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2544
2545         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2546         kfree(edge_serial);
2547 }
2548
2549 static int edge_port_probe(struct usb_serial_port *port)
2550 {
2551         struct edgeport_port *edge_port;
2552         int ret;
2553
2554         edge_port = kzalloc(sizeof(*edge_port), GFP_KERNEL);
2555         if (!edge_port)
2556                 return -ENOMEM;
2557
2558         spin_lock_init(&edge_port->ep_lock);
2559         edge_port->port = port;
2560         edge_port->edge_serial = usb_get_serial_data(port->serial);
2561         edge_port->bUartMode = default_uart_mode;
2562
2563         switch (port->port_number) {
2564         case 0:
2565                 edge_port->uart_base = UMPMEM_BASE_UART1;
2566                 edge_port->dma_address = UMPD_OEDB1_ADDRESS;
2567                 break;
2568         case 1:
2569                 edge_port->uart_base = UMPMEM_BASE_UART2;
2570                 edge_port->dma_address = UMPD_OEDB2_ADDRESS;
2571                 break;
2572         default:
2573                 dev_err(&port->dev, "unknown port number\n");
2574                 ret = -ENODEV;
2575                 goto err;
2576         }
2577
2578         dev_dbg(&port->dev,
2579                 "%s - port_number = %d, uart_base = %04x, dma_address = %04x\n",
2580                 __func__, port->port_number, edge_port->uart_base,
2581                 edge_port->dma_address);
2582
2583         usb_set_serial_port_data(port, edge_port);
2584
2585         ret = edge_create_sysfs_attrs(port);
2586         if (ret)
2587                 goto err;
2588
2589         /*
2590          * The LSR does not tell when the transmitter shift register has
2591          * emptied so add a one-character drain delay.
2592          */
2593         port->port.drain_delay = 1;
2594
2595         return 0;
2596 err:
2597         kfree(edge_port);
2598
2599         return ret;
2600 }
2601
2602 static void edge_port_remove(struct usb_serial_port *port)
2603 {
2604         struct edgeport_port *edge_port;
2605
2606         edge_port = usb_get_serial_port_data(port);
2607         edge_remove_sysfs_attrs(port);
2608         kfree(edge_port);
2609 }
2610
2611 /* Sysfs Attributes */
2612
2613 static ssize_t uart_mode_show(struct device *dev,
2614         struct device_attribute *attr, char *buf)
2615 {
2616         struct usb_serial_port *port = to_usb_serial_port(dev);
2617         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2618
2619         return sprintf(buf, "%d\n", edge_port->bUartMode);
2620 }
2621
2622 static ssize_t uart_mode_store(struct device *dev,
2623         struct device_attribute *attr, const char *valbuf, size_t count)
2624 {
2625         struct usb_serial_port *port = to_usb_serial_port(dev);
2626         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2627         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2628
2629         dev_dbg(dev, "%s: setting uart_mode = %d\n", __func__, v);
2630
2631         if (v < 256)
2632                 edge_port->bUartMode = v;
2633         else
2634                 dev_err(dev, "%s - uart_mode %d is invalid\n", __func__, v);
2635
2636         return count;
2637 }
2638 static DEVICE_ATTR_RW(uart_mode);
2639
2640 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2641 {
2642         return device_create_file(&port->dev, &dev_attr_uart_mode);
2643 }
2644
2645 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2646 {
2647         device_remove_file(&port->dev, &dev_attr_uart_mode);
2648         return 0;
2649 }
2650
2651 #ifdef CONFIG_PM
2652 static int edge_suspend(struct usb_serial *serial, pm_message_t message)
2653 {
2654         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2655
2656         cancel_delayed_work_sync(&edge_serial->heartbeat_work);
2657
2658         return 0;
2659 }
2660
2661 static int edge_resume(struct usb_serial *serial)
2662 {
2663         struct edgeport_serial *edge_serial = usb_get_serial_data(serial);
2664
2665         edge_heartbeat_schedule(edge_serial);
2666
2667         return 0;
2668 }
2669 #endif
2670
2671 static struct usb_serial_driver edgeport_1port_device = {
2672         .driver = {
2673                 .owner          = THIS_MODULE,
2674                 .name           = "edgeport_ti_1",
2675         },
2676         .description            = "Edgeport TI 1 port adapter",
2677         .id_table               = edgeport_1port_id_table,
2678         .num_ports              = 1,
2679         .num_bulk_out           = 1,
2680         .open                   = edge_open,
2681         .close                  = edge_close,
2682         .throttle               = edge_throttle,
2683         .unthrottle             = edge_unthrottle,
2684         .attach                 = edge_startup,
2685         .calc_num_ports         = edge_calc_num_ports,
2686         .disconnect             = edge_disconnect,
2687         .release                = edge_release,
2688         .port_probe             = edge_port_probe,
2689         .port_remove            = edge_port_remove,
2690         .set_termios            = edge_set_termios,
2691         .tiocmget               = edge_tiocmget,
2692         .tiocmset               = edge_tiocmset,
2693         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2694         .get_icount             = usb_serial_generic_get_icount,
2695         .write                  = edge_write,
2696         .write_room             = edge_write_room,
2697         .chars_in_buffer        = edge_chars_in_buffer,
2698         .tx_empty               = edge_tx_empty,
2699         .break_ctl              = edge_break,
2700         .read_int_callback      = edge_interrupt_callback,
2701         .read_bulk_callback     = edge_bulk_in_callback,
2702         .write_bulk_callback    = edge_bulk_out_callback,
2703 #ifdef CONFIG_PM
2704         .suspend                = edge_suspend,
2705         .resume                 = edge_resume,
2706 #endif
2707 };
2708
2709 static struct usb_serial_driver edgeport_2port_device = {
2710         .driver = {
2711                 .owner          = THIS_MODULE,
2712                 .name           = "edgeport_ti_2",
2713         },
2714         .description            = "Edgeport TI 2 port adapter",
2715         .id_table               = edgeport_2port_id_table,
2716         .num_ports              = 2,
2717         .num_bulk_out           = 1,
2718         .open                   = edge_open,
2719         .close                  = edge_close,
2720         .throttle               = edge_throttle,
2721         .unthrottle             = edge_unthrottle,
2722         .attach                 = edge_startup,
2723         .calc_num_ports         = edge_calc_num_ports,
2724         .disconnect             = edge_disconnect,
2725         .release                = edge_release,
2726         .port_probe             = edge_port_probe,
2727         .port_remove            = edge_port_remove,
2728         .set_termios            = edge_set_termios,
2729         .tiocmget               = edge_tiocmget,
2730         .tiocmset               = edge_tiocmset,
2731         .tiocmiwait             = usb_serial_generic_tiocmiwait,
2732         .get_icount             = usb_serial_generic_get_icount,
2733         .write                  = edge_write,
2734         .write_room             = edge_write_room,
2735         .chars_in_buffer        = edge_chars_in_buffer,
2736         .tx_empty               = edge_tx_empty,
2737         .break_ctl              = edge_break,
2738         .read_int_callback      = edge_interrupt_callback,
2739         .read_bulk_callback     = edge_bulk_in_callback,
2740         .write_bulk_callback    = edge_bulk_out_callback,
2741 #ifdef CONFIG_PM
2742         .suspend                = edge_suspend,
2743         .resume                 = edge_resume,
2744 #endif
2745 };
2746
2747 static struct usb_serial_driver * const serial_drivers[] = {
2748         &edgeport_1port_device, &edgeport_2port_device, NULL
2749 };
2750
2751 module_usb_serial_driver(serial_drivers, id_table_combined);
2752
2753 MODULE_AUTHOR(DRIVER_AUTHOR);
2754 MODULE_DESCRIPTION(DRIVER_DESC);
2755 MODULE_LICENSE("GPL");
2756 /*(DEBLOBBED)*/
2757
2758 module_param(ignore_cpu_rev, bool, 0644);
2759 MODULE_PARM_DESC(ignore_cpu_rev,
2760                         "Ignore the cpu revision when connecting to a device");
2761
2762 module_param(default_uart_mode, int, 0644);
2763 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");