git.oblomov.eu Git - linux-2.6/blob - drivers/usb/serial/ti_usb_3410_5052.c

   1 /* vi: ts=8 sw=8
   2  *
   3  * TI 3410/5052 USB Serial Driver
   4  *
   5  * Copyright (C) 2004 Texas Instruments
   6  *
   7  * This driver is based on the Linux io_ti driver, which is
   8  *   Copyright (C) 2000-2002 Inside Out Networks
   9  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * For questions or problems with this driver, contact Texas Instruments
  17  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
  18  * Peter Berger <pberger@brimson.com>.
  19  *
  20  * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
  21  * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
  22  * configuration.
  23  *
  24  * #!/bin/bash
  25  *
  26  * BOOT_CONFIG=1
  27  * ACTIVE_CONFIG=2
  28  *
  29  * if [[ "$ACTION" != "add" ]]
  30  * then
  31  *      exit
  32  * fi
  33  *
  34  * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
  35  *
  36  * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
  37  * then
  38  *      exit
  39  * fi
  40  *
  41  * PRODUCT=${PRODUCT%/?*}               # delete version
  42  * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
  43  * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
  44  *
  45  * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
  46  *
  47  * function scan() {
  48  *      s=$1
  49  *      shift
  50  *      for i
  51  *      do
  52  *              if [[ $s -eq $i ]]
  53  *              then
  54  *                      return 0
  55  *              fi
  56  *      done
  57  *      return 1
  58  * }
  59  *
  60  * IFS=$IFS,
  61  *
  62  * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
  63  * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
  64  * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
  65  * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
  66  * then
  67  *      echo $ACTIVE_CONFIG > $CONFIG_PATH
  68  * fi
  69  */
  70
  71 #include <linux/config.h>
  72 #include <linux/kernel.h>
  73 #include <linux/errno.h>
  74 #include <linux/init.h>
  75 #include <linux/slab.h>
  76 #include <linux/tty.h>
  77 #include <linux/tty_driver.h>
  78 #include <linux/tty_flip.h>
  79 #include <linux/module.h>
  80 #include <linux/spinlock.h>
  81 #include <linux/ioctl.h>
  82 #include <linux/serial.h>
  83 #include <linux/circ_buf.h>
  84 #include <asm/uaccess.h>
  85 #include <asm/semaphore.h>
  86 #include <linux/usb.h>
  87
  88 #include "usb-serial.h"
  89 #include "ti_usb_3410_5052.h"
  90 #include "ti_fw_3410.h"         /* firmware image for 3410 */
  91 #include "ti_fw_5052.h"         /* firmware image for 5052 */
  92
  93
  94 /* Defines */
  95
  96 #define TI_DRIVER_VERSION       "v0.9"
  97 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  98 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  99
 100 #define TI_FIRMWARE_BUF_SIZE    16284
 101
 102 #define TI_WRITE_BUF_SIZE       1024
 103
 104 #define TI_TRANSFER_TIMEOUT     2
 105
 106 #define TI_DEFAULT_LOW_LATENCY  0
 107 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
 108
 109 /* supported setserial flags */
 110 #define TI_SET_SERIAL_FLAGS     (ASYNC_LOW_LATENCY)
 111
 112 /* read urb states */
 113 #define TI_READ_URB_RUNNING     0
 114 #define TI_READ_URB_STOPPING    1
 115 #define TI_READ_URB_STOPPED     2
 116
 117 #define TI_EXTRA_VID_PID_COUNT  5
 118
 119
 120 /* Structures */
 121
 122 struct ti_port {
 123         int                     tp_is_open;
 124         __u8                    tp_msr;
 125         __u8                    tp_lsr;
 126         __u8                    tp_shadow_mcr;
 127         __u8                    tp_uart_mode;   /* 232 or 485 modes */
 128         unsigned int            tp_uart_base_addr;
 129         int                     tp_flags;
 130         int                     tp_closing_wait;/* in .01 secs */
 131         struct async_icount     tp_icount;
 132         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
 133         wait_queue_head_t       tp_write_wait;
 134         struct ti_device        *tp_tdev;
 135         struct usb_serial_port  *tp_port;
 136         spinlock_t              tp_lock;
 137         int                     tp_read_urb_state;
 138         int                     tp_write_urb_in_use;
 139         struct circ_buf         *tp_write_buf;
 140 };
 141
 142 struct ti_device {
 143         struct semaphore        td_open_close_sem;
 144         int                     td_open_port_count;
 145         struct usb_serial       *td_serial;
 146         int                     td_is_3410;
 147         int                     td_urb_error;
 148 };
 149
 150
 151 /* Function Declarations */
 152
 153 static int ti_startup(struct usb_serial *serial);
 154 static void ti_shutdown(struct usb_serial *serial);
 155 static int ti_open(struct usb_serial_port *port, struct file *file);
 156 static void ti_close(struct usb_serial_port *port, struct file *file);
 157 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
 158         int count);
 159 static int ti_write_room(struct usb_serial_port *port);
 160 static int ti_chars_in_buffer(struct usb_serial_port *port);
 161 static void ti_throttle(struct usb_serial_port *port);
 162 static void ti_unthrottle(struct usb_serial_port *port);
 163 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
 164 static void ti_set_termios(struct usb_serial_port *port,
 165         struct termios *old_termios);
 166 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
 167 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
 168         unsigned int set, unsigned int clear);
 169 static void ti_break(struct usb_serial_port *port, int break_state);
 170 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs);
 171 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs);
 172 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs);
 173
 174 static void ti_recv(struct device *dev, struct tty_struct *tty,
 175         unsigned char *data, int length);
 176 static void ti_send(struct ti_port *tport);
 177 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 178 static int ti_get_lsr(struct ti_port *tport);
 179 static int ti_get_serial_info(struct ti_port *tport,
 180         struct serial_struct __user *ret_arg);
 181 static int ti_set_serial_info(struct ti_port *tport,
 182         struct serial_struct __user *new_arg);
 183 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 184
 185 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 186
 187 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 188 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 189
 190 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 191         __u16 moduleid, __u16 value, __u8 *data, int size);
 192 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 193         __u16 moduleid, __u16 value, __u8 *data, int size);
 194
 195 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 196         __u8 mask, __u8 byte);
 197
 198 static int ti_download_firmware(struct ti_device *tdev,
 199         unsigned char *firmware, unsigned int firmware_size);
 200
 201 /* circular buffer */
 202 static struct circ_buf *ti_buf_alloc(void);
 203 static void ti_buf_free(struct circ_buf *cb);
 204 static void ti_buf_clear(struct circ_buf *cb);
 205 static int ti_buf_data_avail(struct circ_buf *cb);
 206 static int ti_buf_space_avail(struct circ_buf *cb);
 207 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
 208 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
 209
 210
 211 /* Data */
 212
 213 /* module parameters */
 214 static int debug;
 215 static int low_latency = TI_DEFAULT_LOW_LATENCY;
 216 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 217 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 218 static int vendor_3410_count;
 219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 220 static int product_3410_count;
 221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 222 static int vendor_5052_count;
 223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 224 static int product_5052_count;
 225
 226 /* supported devices */
 227 /* the array dimension is the number of default entries plus */
 228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 229 /* null entry */
 230 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
 231         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 232 };
 233
 234 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
 235         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 236         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 237         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 238         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 239 };
 240
 241 static struct usb_device_id ti_id_table_combined[] = {
 242         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 243         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 244         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 245         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 246         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 247         { }
 248 };
 249
 250 static struct usb_driver ti_usb_driver = {
 251         .name                   = "ti_usb_3410_5052",
 252         .probe                  = usb_serial_probe,
 253         .disconnect             = usb_serial_disconnect,
 254         .id_table               = ti_id_table_combined,
 255         .no_dynamic_id =        1,
 256 };
 257
 258 static struct usb_serial_driver ti_1port_device = {
 259         .driver = {
 260                 .owner          = THIS_MODULE,
 261                 .name           = "ti_usb_3410_5052_1",
 262         },
 263         .description            = "TI USB 3410 1 port adapter",
 264         .id_table               = ti_id_table_3410,
 265         .num_interrupt_in       = 1,
 266         .num_bulk_in            = 1,
 267         .num_bulk_out           = 1,
 268         .num_ports              = 1,
 269         .attach                 = ti_startup,
 270         .shutdown               = ti_shutdown,
 271         .open                   = ti_open,
 272         .close                  = ti_close,
 273         .write                  = ti_write,
 274         .write_room             = ti_write_room,
 275         .chars_in_buffer        = ti_chars_in_buffer,
 276         .throttle               = ti_throttle,
 277         .unthrottle             = ti_unthrottle,
 278         .ioctl                  = ti_ioctl,
 279         .set_termios            = ti_set_termios,
 280         .tiocmget               = ti_tiocmget,
 281         .tiocmset               = ti_tiocmset,
 282         .break_ctl              = ti_break,
 283         .read_int_callback      = ti_interrupt_callback,
 284         .read_bulk_callback     = ti_bulk_in_callback,
 285         .write_bulk_callback    = ti_bulk_out_callback,
 286 };
 287
 288 static struct usb_serial_driver ti_2port_device = {
 289         .driver = {
 290                 .owner          = THIS_MODULE,
 291                 .name           = "ti_usb_3410_5052_2",
 292         },
 293         .description            = "TI USB 5052 2 port adapter",
 294         .id_table               = ti_id_table_5052,
 295         .num_interrupt_in       = 1,
 296         .num_bulk_in            = 2,
 297         .num_bulk_out           = 2,
 298         .num_ports              = 2,
 299         .attach                 = ti_startup,
 300         .shutdown               = ti_shutdown,
 301         .open                   = ti_open,
 302         .close                  = ti_close,
 303         .write                  = ti_write,
 304         .write_room             = ti_write_room,
 305         .chars_in_buffer        = ti_chars_in_buffer,
 306         .throttle               = ti_throttle,
 307         .unthrottle             = ti_unthrottle,
 308         .ioctl                  = ti_ioctl,
 309         .set_termios            = ti_set_termios,
 310         .tiocmget               = ti_tiocmget,
 311         .tiocmset               = ti_tiocmset,
 312         .break_ctl              = ti_break,
 313         .read_int_callback      = ti_interrupt_callback,
 314         .read_bulk_callback     = ti_bulk_in_callback,
 315         .write_bulk_callback    = ti_bulk_out_callback,
 316 };
 317
 318
 319 /* Module */
 320
 321 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 322 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 323 MODULE_VERSION(TI_DRIVER_VERSION);
 324 MODULE_LICENSE("GPL");
 325
 326 module_param(debug, bool, S_IRUGO | S_IWUSR);
 327 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 328
 329 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
 330 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
 331
 332 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 333 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 334
 335 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 336 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
 337 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 338 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
 339 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 340 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
 341 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 342 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
 343
 344 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 345
 346
 347 /* Functions */
 348
 349 static int __init ti_init(void)
 350 {
 351         int i,j;
 352         int ret;
 353
 354         /* insert extra vendor and product ids */
 355         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 356         for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
 357                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 358                 ti_id_table_3410[j].idProduct = product_3410[i];
 359                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 360         }
 361         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 362         for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
 363                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 364                 ti_id_table_5052[j].idProduct = product_5052[i];
 365                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 366         }
 367
 368         ret = usb_serial_register(&ti_1port_device);
 369         if (ret)
 370                 goto failed_1port;
 371         ret = usb_serial_register(&ti_2port_device);
 372         if (ret)
 373                 goto failed_2port;
 374
 375         ret = usb_register(&ti_usb_driver);
 376         if (ret)
 377                 goto failed_usb;
 378
 379         info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
 380
 381         return 0;
 382
 383 failed_usb:
 384         usb_serial_deregister(&ti_2port_device);
 385 failed_2port:
 386         usb_serial_deregister(&ti_1port_device);
 387 failed_1port:
 388         return ret;
 389 }
 390
 391
 392 static void __exit ti_exit(void)
 393 {
 394         usb_serial_deregister(&ti_1port_device);
 395         usb_serial_deregister(&ti_2port_device);
 396         usb_deregister(&ti_usb_driver);
 397 }
 398
 399
 400 module_init(ti_init);
 401 module_exit(ti_exit);
 402
 403
 404 static int ti_startup(struct usb_serial *serial)
 405 {
 406         struct ti_device *tdev;
 407         struct ti_port *tport;
 408         struct usb_device *dev = serial->dev;
 409         int status;
 410         int i;
 411
 412
 413         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 414             __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
 415             dev->descriptor.bNumConfigurations,
 416             dev->actconfig->desc.bConfigurationValue);
 417
 418         /* create device structure */
 419         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 420         if (tdev == NULL) {
 421                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
 422                 return -ENOMEM;
 423         }
 424         sema_init(&tdev->td_open_close_sem, 1);
 425         tdev->td_serial = serial;
 426         usb_set_serial_data(serial, tdev);
 427
 428         /* determine device type */
 429         if (usb_match_id(serial->interface, ti_id_table_3410))
 430                 tdev->td_is_3410 = 1;
 431         dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
 432
 433         /* if we have only 1 configuration, download firmware */
 434         if (dev->descriptor.bNumConfigurations == 1) {
 435
 436                 if (tdev->td_is_3410)
 437                         status = ti_download_firmware(tdev, ti_fw_3410,
 438                                 sizeof(ti_fw_3410));
 439                 else
 440                         status = ti_download_firmware(tdev, ti_fw_5052,
 441                                 sizeof(ti_fw_5052));
 442                 if (status)
 443                         goto free_tdev;
 444
 445                 /* 3410 must be reset, 5052 resets itself */
 446                 if (tdev->td_is_3410) {
 447                         msleep_interruptible(100);
 448                         usb_reset_device(dev);
 449                 }
 450
 451                 status = -ENODEV;
 452                 goto free_tdev;
 453         }
 454
 455         /* the second configuration must be set (in sysfs by hotplug script) */
 456         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 457                 status = -ENODEV;
 458                 goto free_tdev;
 459         }
 460
 461         /* set up port structures */
 462         for (i = 0; i < serial->num_ports; ++i) {
 463                 tport = kmalloc(sizeof(struct ti_port), GFP_KERNEL);
 464                 if (tport == NULL) {
 465                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
 466                         status = -ENOMEM;
 467                         goto free_tports;
 468                 }
 469                 memset(tport, 0, sizeof(struct ti_port));
 470                 spin_lock_init(&tport->tp_lock);
 471                 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 472                 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
 473                 tport->tp_closing_wait = closing_wait;
 474                 init_waitqueue_head(&tport->tp_msr_wait);
 475                 init_waitqueue_head(&tport->tp_write_wait);
 476                 tport->tp_write_buf = ti_buf_alloc();
 477                 if (tport->tp_write_buf == NULL) {
 478                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
 479                         kfree(tport);
 480                         status = -ENOMEM;
 481                         goto free_tports;
 482                 }
 483                 tport->tp_port = serial->port[i];
 484                 tport->tp_tdev = tdev;
 485                 usb_set_serial_port_data(serial->port[i], tport);
 486                 tport->tp_uart_mode = 0;        /* default is RS232 */
 487         }
 488
 489         return 0;
 490
 491 free_tports:
 492         for (--i; i>=0; --i) {
 493                 tport = usb_get_serial_port_data(serial->port[i]);
 494                 ti_buf_free(tport->tp_write_buf);
 495                 kfree(tport);
 496                 usb_set_serial_port_data(serial->port[i], NULL);
 497         }
 498 free_tdev:
 499         kfree(tdev);
 500         usb_set_serial_data(serial, NULL);
 501         return status;
 502 }
 503
 504
 505 static void ti_shutdown(struct usb_serial *serial)
 506 {
 507         int i;
 508         struct ti_device *tdev = usb_get_serial_data(serial);
 509         struct ti_port *tport;
 510
 511         dbg("%s", __FUNCTION__);
 512
 513         for (i=0; i < serial->num_ports; ++i) {
 514                 tport = usb_get_serial_port_data(serial->port[i]);
 515                 if (tport) {
 516                         ti_buf_free(tport->tp_write_buf);
 517                         kfree(tport);
 518                         usb_set_serial_port_data(serial->port[i], NULL);
 519                 }
 520         }
 521
 522         kfree(tdev);
 523         usb_set_serial_data(serial, NULL);
 524 }
 525
 526
 527 static int ti_open(struct usb_serial_port *port, struct file *file)
 528 {
 529         struct ti_port *tport = usb_get_serial_port_data(port);
 530         struct ti_device *tdev;
 531         struct usb_device *dev;
 532         struct urb *urb;
 533         int port_number;
 534         int status;
 535         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 536                              TI_PIPE_TIMEOUT_ENABLE |
 537                              (TI_TRANSFER_TIMEOUT << 2));
 538
 539         dbg("%s - port %d", __FUNCTION__, port->number);
 540
 541         if (tport == NULL)
 542                 return -ENODEV;
 543
 544         dev = port->serial->dev;
 545         tdev = tport->tp_tdev;
 546
 547         /* only one open on any port on a device at a time */
 548         if (down_interruptible(&tdev->td_open_close_sem))
 549                 return -ERESTARTSYS;
 550
 551         if (port->tty)
 552                 port->tty->low_latency =
 553                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 554
 555         port_number = port->number - port->serial->minor;
 556
 557         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 558
 559         tport->tp_msr = 0;
 560         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 561
 562         /* start interrupt urb the first time a port is opened on this device */
 563         if (tdev->td_open_port_count == 0) {
 564                 dbg("%s - start interrupt in urb", __FUNCTION__);
 565                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 566                 if (!urb) {
 567                         dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
 568                         status = -EINVAL;
 569                         goto up_sem;
 570                 }
 571                 urb->complete = ti_interrupt_callback;
 572                 urb->context = tdev;
 573                 urb->dev = dev;
 574                 status = usb_submit_urb(urb, GFP_KERNEL);
 575                 if (status) {
 576                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
 577                         goto up_sem;
 578                 }
 579         }
 580
 581         ti_set_termios(port, NULL);
 582
 583         dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
 584         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 585                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 586         if (status) {
 587                 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
 588                 goto unlink_int_urb;
 589         }
 590
 591         dbg("%s - sending TI_START_PORT", __FUNCTION__);
 592         status = ti_command_out_sync(tdev, TI_START_PORT,
 593                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 594         if (status) {
 595                 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
 596                 goto unlink_int_urb;
 597         }
 598
 599         dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
 600         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 601                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 602         if (status) {
 603                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
 604                 goto unlink_int_urb;
 605         }
 606         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 607                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 608         if (status) {
 609                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
 610                 goto unlink_int_urb;
 611         }
 612
 613         /* reset the data toggle on the bulk endpoints to work around bug in
 614          * host controllers where things get out of sync some times */
 615         usb_clear_halt(dev, port->write_urb->pipe);
 616         usb_clear_halt(dev, port->read_urb->pipe);
 617
 618         ti_set_termios(port, NULL);
 619
 620         dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
 621         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 622                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 623         if (status) {
 624                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
 625                 goto unlink_int_urb;
 626         }
 627
 628         dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
 629         status = ti_command_out_sync(tdev, TI_START_PORT,
 630                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 631         if (status) {
 632                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
 633                 goto unlink_int_urb;
 634         }
 635
 636         /* start read urb */
 637         dbg("%s - start read urb", __FUNCTION__);
 638         urb = port->read_urb;
 639         if (!urb) {
 640                 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
 641                 status = -EINVAL;
 642                 goto unlink_int_urb;
 643         }
 644         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 645         urb->complete = ti_bulk_in_callback;
 646         urb->context = tport;
 647         urb->dev = dev;
 648         status = usb_submit_urb(urb, GFP_KERNEL);
 649         if (status) {
 650                 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
 651                 goto unlink_int_urb;
 652         }
 653
 654         tport->tp_is_open = 1;
 655         ++tdev->td_open_port_count;
 656
 657         goto up_sem;
 658
 659 unlink_int_urb:
 660         if (tdev->td_open_port_count == 0)
 661                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 662 up_sem:
 663         up(&tdev->td_open_close_sem);
 664         dbg("%s - exit %d", __FUNCTION__, status);
 665         return status;
 666 }
 667
 668
 669 static void ti_close(struct usb_serial_port *port, struct file *file)
 670 {
 671         struct ti_device *tdev;
 672         struct ti_port *tport;
 673         int port_number;
 674         int status;
 675         int do_up;
 676
 677         dbg("%s - port %d", __FUNCTION__, port->number);
 678
 679         tdev = usb_get_serial_data(port->serial);
 680         tport = usb_get_serial_port_data(port);
 681         if (tdev == NULL || tport == NULL)
 682                 return;
 683
 684         tport->tp_is_open = 0;
 685
 686         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 687
 688         usb_kill_urb(port->read_urb);
 689         usb_kill_urb(port->write_urb);
 690         tport->tp_write_urb_in_use = 0;
 691
 692         port_number = port->number - port->serial->minor;
 693
 694         dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
 695         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 696                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 697         if (status)
 698                 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
 699
 700         /* if down is interrupted, continue anyway */
 701         do_up = !down_interruptible(&tdev->td_open_close_sem);
 702         --tport->tp_tdev->td_open_port_count;
 703         if (tport->tp_tdev->td_open_port_count <= 0) {
 704                 /* last port is closed, shut down interrupt urb */
 705                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 706                 tport->tp_tdev->td_open_port_count = 0;
 707         }
 708         if (do_up)
 709                 up(&tdev->td_open_close_sem);
 710
 711         dbg("%s - exit", __FUNCTION__);
 712 }
 713
 714
 715 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
 716         int count)
 717 {
 718         struct ti_port *tport = usb_get_serial_port_data(port);
 719         unsigned long flags;
 720
 721         dbg("%s - port %d", __FUNCTION__, port->number);
 722
 723         if (count == 0) {
 724                 dbg("%s - write request of 0 bytes", __FUNCTION__);
 725                 return 0;
 726         }
 727
 728         if (tport == NULL || !tport->tp_is_open)
 729                 return -ENODEV;
 730
 731         spin_lock_irqsave(&tport->tp_lock, flags);
 732         count = ti_buf_put(tport->tp_write_buf, data, count);
 733         spin_unlock_irqrestore(&tport->tp_lock, flags);
 734
 735         ti_send(tport);
 736
 737         return count;
 738 }
 739
 740
 741 static int ti_write_room(struct usb_serial_port *port)
 742 {
 743         struct ti_port *tport = usb_get_serial_port_data(port);
 744         int room = 0;
 745         unsigned long flags;
 746
 747         dbg("%s - port %d", __FUNCTION__, port->number);
 748
 749         if (tport == NULL)
 750                 return -ENODEV;
 751
 752         spin_lock_irqsave(&tport->tp_lock, flags);
 753         room = ti_buf_space_avail(tport->tp_write_buf);
 754         spin_unlock_irqrestore(&tport->tp_lock, flags);
 755
 756         dbg("%s - returns %d", __FUNCTION__, room);
 757         return room;
 758 }
 759
 760
 761 static int ti_chars_in_buffer(struct usb_serial_port *port)
 762 {
 763         struct ti_port *tport = usb_get_serial_port_data(port);
 764         int chars = 0;
 765         unsigned long flags;
 766
 767         dbg("%s - port %d", __FUNCTION__, port->number);
 768
 769         if (tport == NULL)
 770                 return -ENODEV;
 771
 772         spin_lock_irqsave(&tport->tp_lock, flags);
 773         chars = ti_buf_data_avail(tport->tp_write_buf);
 774         spin_unlock_irqrestore(&tport->tp_lock, flags);
 775
 776         dbg("%s - returns %d", __FUNCTION__, chars);
 777         return chars;
 778 }
 779
 780
 781 static void ti_throttle(struct usb_serial_port *port)
 782 {
 783         struct ti_port *tport = usb_get_serial_port_data(port);
 784         struct tty_struct *tty;
 785
 786         dbg("%s - port %d", __FUNCTION__, port->number);
 787
 788         if (tport == NULL)
 789                 return;
 790
 791         tty = port->tty;
 792         if (!tty) {
 793                 dbg("%s - no tty", __FUNCTION__);
 794                 return;
 795         }
 796
 797         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 798                 ti_stop_read(tport, tty);
 799
 800 }
 801
 802
 803 static void ti_unthrottle(struct usb_serial_port *port)
 804 {
 805         struct ti_port *tport = usb_get_serial_port_data(port);
 806         struct tty_struct *tty;
 807         int status;
 808
 809         dbg("%s - port %d", __FUNCTION__, port->number);
 810
 811         if (tport == NULL)
 812                 return;
 813
 814         tty = port->tty;
 815         if (!tty) {
 816                 dbg("%s - no tty", __FUNCTION__);
 817                 return;
 818         }
 819
 820         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 821                 status = ti_restart_read(tport, tty);
 822                 if (status)
 823                         dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
 824         }
 825 }
 826
 827
 828 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
 829         unsigned int cmd, unsigned long arg)
 830 {
 831         struct ti_port *tport = usb_get_serial_port_data(port);
 832         struct async_icount cnow;
 833         struct async_icount cprev;
 834
 835         dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
 836
 837         if (tport == NULL)
 838                 return -ENODEV;
 839
 840         switch (cmd) {
 841                 case TIOCGSERIAL:
 842                         dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
 843                         return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
 844                         break;
 845
 846                 case TIOCSSERIAL:
 847                         dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
 848                         return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
 849                         break;
 850
 851                 case TIOCMIWAIT:
 852                         dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
 853                         cprev = tport->tp_icount;
 854                         while (1) {
 855                                 interruptible_sleep_on(&tport->tp_msr_wait);
 856                                 if (signal_pending(current))
 857                                         return -ERESTARTSYS;
 858                                 cnow = tport->tp_icount;
 859                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 860                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 861                                         return -EIO; /* no change => error */
 862                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 863                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 864                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 865                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
 866                                         return 0;
 867                                 }
 868                                 cprev = cnow;
 869                         }
 870                         break;
 871
 872                 case TIOCGICOUNT:
 873                         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
 874                         if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
 875                                 return -EFAULT;
 876                         return 0;
 877         }
 878
 879         return -ENOIOCTLCMD;
 880 }
 881
 882
 883 static void ti_set_termios(struct usb_serial_port *port,
 884         struct termios *old_termios)
 885 {
 886         struct ti_port *tport = usb_get_serial_port_data(port);
 887         struct tty_struct *tty = port->tty;
 888         struct ti_uart_config *config;
 889         tcflag_t cflag,iflag;
 890         int baud;
 891         int status;
 892         int port_number = port->number - port->serial->minor;
 893         unsigned int mcr;
 894
 895         dbg("%s - port %d", __FUNCTION__, port->number);
 896
 897         if (!tty || !tty->termios) {
 898                 dbg("%s - no tty or termios", __FUNCTION__);
 899                 return;
 900         }
 901
 902         cflag = tty->termios->c_cflag;
 903         iflag = tty->termios->c_iflag;
 904
 905         if (old_termios && cflag == old_termios->c_cflag
 906         && iflag == old_termios->c_iflag) {
 907                 dbg("%s - nothing to change", __FUNCTION__);
 908                 return;
 909         }
 910
 911         dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
 912
 913         if (old_termios)
 914                 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
 915
 916         if (tport == NULL)
 917                 return;
 918
 919         config = kmalloc(sizeof(*config), GFP_KERNEL);
 920         if (!config) {
 921                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
 922                 return;
 923         }
 924
 925         config->wFlags = 0;
 926
 927         /* these flags must be set */
 928         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 929         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 930         config->bUartMode = (__u8)(tport->tp_uart_mode);
 931
 932         switch (cflag & CSIZE) {
 933                 case CS5:
 934                             config->bDataBits = TI_UART_5_DATA_BITS;
 935                             break;
 936                 case CS6:
 937                             config->bDataBits = TI_UART_6_DATA_BITS;
 938                             break;
 939                 case CS7:
 940                             config->bDataBits = TI_UART_7_DATA_BITS;
 941                             break;
 942                 default:
 943                 case CS8:
 944                             config->bDataBits = TI_UART_8_DATA_BITS;
 945                             break;
 946         }
 947
 948         if (cflag & PARENB) {
 949                 if (cflag & PARODD) {
 950                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 951                         config->bParity = TI_UART_ODD_PARITY;
 952                 } else {
 953                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 954                         config->bParity = TI_UART_EVEN_PARITY;
 955                 }
 956         } else {
 957                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 958                 config->bParity = TI_UART_NO_PARITY;
 959         }
 960
 961         if (cflag & CSTOPB)
 962                 config->bStopBits = TI_UART_2_STOP_BITS;
 963         else
 964                 config->bStopBits = TI_UART_1_STOP_BITS;
 965
 966         if (cflag & CRTSCTS) {
 967                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 968                 if ((cflag & CBAUD) != B0)
 969                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 970                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 971         } else {
 972                 tty->hw_stopped = 0;
 973                 ti_restart_read(tport, tty);
 974         }
 975
 976         if (I_IXOFF(tty) || I_IXON(tty)) {
 977                 config->cXon  = START_CHAR(tty);
 978                 config->cXoff = STOP_CHAR(tty);
 979
 980                 if (I_IXOFF(tty))
 981                         config->wFlags |= TI_UART_ENABLE_X_IN;
 982                 else
 983                         ti_restart_read(tport, tty);
 984
 985                 if (I_IXON(tty))
 986                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 987         }
 988
 989         baud = tty_get_baud_rate(tty);
 990         if (!baud) baud = 9600;
 991         if (tport->tp_tdev->td_is_3410)
 992                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 993         else
 994                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 995
 996         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 997         __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 998
 999         cpu_to_be16s(&config->wBaudRate);
1000         cpu_to_be16s(&config->wFlags);
1001
1002         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1003                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1004                 sizeof(*config));
1005         if (status)
1006                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1007
1008         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1009         mcr = tport->tp_shadow_mcr;
1010         /* if baud rate is B0, clear RTS and DTR */
1011         if ((cflag & CBAUD) == B0)
1012                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1013         status = ti_set_mcr(tport, mcr);
1014         if (status)
1015                 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1016
1017         kfree(config);
1018 }
1019
1020
1021 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1022 {
1023         struct ti_port *tport = usb_get_serial_port_data(port);
1024         unsigned int result;
1025         unsigned int msr;
1026         unsigned int mcr;
1027
1028         dbg("%s - port %d", __FUNCTION__, port->number);
1029
1030         if (tport == NULL)
1031                 return -ENODEV;
1032
1033         msr = tport->tp_msr;
1034         mcr = tport->tp_shadow_mcr;
1035
1036         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1037                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1038                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1039                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1040                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1041                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1042                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1043
1044         dbg("%s - 0x%04X", __FUNCTION__, result);
1045
1046         return result;
1047 }
1048
1049
1050 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1051         unsigned int set, unsigned int clear)
1052 {
1053         struct ti_port *tport = usb_get_serial_port_data(port);
1054         unsigned int mcr;
1055
1056         dbg("%s - port %d", __FUNCTION__, port->number);
1057
1058         if (tport == NULL)
1059                 return -ENODEV;
1060
1061         mcr = tport->tp_shadow_mcr;
1062
1063         if (set & TIOCM_RTS)
1064                 mcr |= TI_MCR_RTS;
1065         if (set & TIOCM_DTR)
1066                 mcr |= TI_MCR_DTR;
1067         if (set & TIOCM_LOOP)
1068                 mcr |= TI_MCR_LOOP;
1069
1070         if (clear & TIOCM_RTS)
1071                 mcr &= ~TI_MCR_RTS;
1072         if (clear & TIOCM_DTR)
1073                 mcr &= ~TI_MCR_DTR;
1074         if (clear & TIOCM_LOOP)
1075                 mcr &= ~TI_MCR_LOOP;
1076
1077         return ti_set_mcr(tport, mcr);
1078 }
1079
1080
1081 static void ti_break(struct usb_serial_port *port, int break_state)
1082 {
1083         struct ti_port *tport = usb_get_serial_port_data(port);
1084         int status;
1085
1086         dbg("%s - state = %d", __FUNCTION__, break_state);
1087
1088         if (tport == NULL)
1089                 return;
1090
1091         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1092
1093         status = ti_write_byte(tport->tp_tdev,
1094                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1095                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1096
1097         if (status)
1098                 dbg("%s - error setting break, %d", __FUNCTION__, status);
1099 }
1100
1101
1102 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs)
1103 {
1104         struct ti_device *tdev = (struct ti_device *)urb->context;
1105         struct usb_serial_port *port;
1106         struct usb_serial *serial = tdev->td_serial;
1107         struct ti_port *tport;
1108         struct device *dev = &urb->dev->dev;
1109         unsigned char *data = urb->transfer_buffer;
1110         int length = urb->actual_length;
1111         int port_number;
1112         int function;
1113         int status;
1114         __u8 msr;
1115
1116         dbg("%s", __FUNCTION__);
1117
1118         switch (urb->status) {
1119         case 0:
1120                 break;
1121         case -ECONNRESET:
1122         case -ENOENT:
1123         case -ESHUTDOWN:
1124                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1125                 tdev->td_urb_error = 1;
1126                 return;
1127         default:
1128                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1129                 tdev->td_urb_error = 1;
1130                 goto exit;
1131         }
1132
1133         if (length != 2) {
1134                 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1135                 goto exit;
1136         }
1137
1138         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1139                 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1140                 goto exit;
1141         }
1142
1143         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1144         function = TI_GET_FUNC_FROM_CODE(data[0]);
1145
1146         dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1147
1148         if (port_number >= serial->num_ports) {
1149                 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1150                 goto exit;
1151         }
1152
1153         port = serial->port[port_number];
1154
1155         tport = usb_get_serial_port_data(port);
1156         if (!tport)
1157                 goto exit;
1158
1159         switch (function) {
1160         case TI_CODE_DATA_ERROR:
1161                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1162                 break;
1163
1164         case TI_CODE_MODEM_STATUS:
1165                 msr = data[1];
1166                 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1167                 ti_handle_new_msr(tport, msr);
1168                 break;
1169
1170         default:
1171                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1172                 break;
1173         }
1174
1175 exit:
1176         status = usb_submit_urb(urb, GFP_ATOMIC);
1177         if (status)
1178                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
1179 }
1180
1181
1182 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs)
1183 {
1184         struct ti_port *tport = (struct ti_port *)urb->context;
1185         struct usb_serial_port *port = tport->tp_port;
1186         struct device *dev = &urb->dev->dev;
1187         int status = 0;
1188
1189         dbg("%s", __FUNCTION__);
1190
1191         switch (urb->status) {
1192         case 0:
1193                 break;
1194         case -ECONNRESET:
1195         case -ENOENT:
1196         case -ESHUTDOWN:
1197                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1198                 tport->tp_tdev->td_urb_error = 1;
1199                 wake_up_interruptible(&tport->tp_write_wait);
1200                 return;
1201         default:
1202                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status );
1203                 tport->tp_tdev->td_urb_error = 1;
1204                 wake_up_interruptible(&tport->tp_write_wait);
1205         }
1206
1207         if (urb->status == -EPIPE)
1208                 goto exit;
1209
1210         if (urb->status) {
1211                 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1212                 return;
1213         }
1214
1215         if (port->tty && urb->actual_length) {
1216                 usb_serial_debug_data(debug, dev, __FUNCTION__,
1217                         urb->actual_length, urb->transfer_buffer);
1218
1219                 if (!tport->tp_is_open)
1220                         dbg("%s - port closed, dropping data", __FUNCTION__);
1221                 else
1222                         ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1223                                 urb->actual_length);
1224
1225                 spin_lock(&tport->tp_lock);
1226                 tport->tp_icount.rx += urb->actual_length;
1227                 spin_unlock(&tport->tp_lock);
1228         }
1229
1230 exit:
1231         /* continue to read unless stopping */
1232         spin_lock(&tport->tp_lock);
1233         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1234                 urb->dev = port->serial->dev;
1235                 status = usb_submit_urb(urb, GFP_ATOMIC);
1236         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1237                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1238         }
1239         spin_unlock(&tport->tp_lock);
1240         if (status)
1241                 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
1242 }
1243
1244
1245 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs)
1246 {
1247         struct ti_port *tport = (struct ti_port *)urb->context;
1248         struct usb_serial_port *port = tport->tp_port;
1249         struct device *dev = &urb->dev->dev;
1250
1251         dbg("%s - port %d", __FUNCTION__, port->number);
1252
1253         tport->tp_write_urb_in_use = 0;
1254
1255         switch (urb->status) {
1256         case 0:
1257                 break;
1258         case -ECONNRESET:
1259         case -ENOENT:
1260         case -ESHUTDOWN:
1261                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1262                 tport->tp_tdev->td_urb_error = 1;
1263                 wake_up_interruptible(&tport->tp_write_wait);
1264                 return;
1265         default:
1266                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1267                 tport->tp_tdev->td_urb_error = 1;
1268                 wake_up_interruptible(&tport->tp_write_wait);
1269         }
1270
1271         /* send any buffered data */
1272         ti_send(tport);
1273 }
1274
1275
1276 static void ti_recv(struct device *dev, struct tty_struct *tty,
1277         unsigned char *data, int length)
1278 {
1279         int cnt;
1280
1281         do {
1282                 cnt = tty_buffer_request_room(tty, length);
1283                 if (cnt < length) {
1284                         dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1285                         if(cnt == 0)
1286                                 break;
1287                 }
1288                 tty_insert_flip_string(tty, data, cnt);
1289                 tty_flip_buffer_push(tty);
1290                 data += cnt;
1291                 length -= cnt;
1292         } while (length > 0);
1293
1294 }
1295
1296
1297 static void ti_send(struct ti_port *tport)
1298 {
1299         int count, result;
1300         struct usb_serial_port *port = tport->tp_port;
1301         struct tty_struct *tty = port->tty;
1302         unsigned long flags;
1303
1304
1305         dbg("%s - port %d", __FUNCTION__, port->number);
1306
1307         spin_lock_irqsave(&tport->tp_lock, flags);
1308
1309         if (tport->tp_write_urb_in_use) {
1310                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1311                 return;
1312         }
1313
1314         count = ti_buf_get(tport->tp_write_buf,
1315                                 port->write_urb->transfer_buffer,
1316                                 port->bulk_out_size);
1317
1318         if (count == 0) {
1319                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1320                 return;
1321         }
1322
1323         tport->tp_write_urb_in_use = 1;
1324
1325         spin_unlock_irqrestore(&tport->tp_lock, flags);
1326
1327         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1328
1329         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1330                            usb_sndbulkpipe(port->serial->dev,
1331                                             port->bulk_out_endpointAddress),
1332                            port->write_urb->transfer_buffer, count,
1333                            ti_bulk_out_callback, tport);
1334
1335         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1336         if (result) {
1337                 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1338                 tport->tp_write_urb_in_use = 0;
1339                 /* TODO: reschedule ti_send */
1340         } else {
1341                 spin_lock_irqsave(&tport->tp_lock, flags);
1342                 tport->tp_icount.tx += count;
1343                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1344         }
1345
1346         /* more room in the buffer for new writes, wakeup */
1347         if (tty)
1348                 tty_wakeup(tty);
1349         wake_up_interruptible(&tport->tp_write_wait);
1350 }
1351
1352
1353 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1354 {
1355         int status;
1356
1357         status = ti_write_byte(tport->tp_tdev,
1358                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1359                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1360
1361         if (!status)
1362                 tport->tp_shadow_mcr = mcr;
1363
1364         return status;
1365 }
1366
1367
1368 static int ti_get_lsr(struct ti_port *tport)
1369 {
1370         int size,status;
1371         struct ti_device *tdev = tport->tp_tdev;
1372         struct usb_serial_port *port = tport->tp_port;
1373         int port_number = port->number - port->serial->minor;
1374         struct ti_port_status *data;
1375
1376         dbg("%s - port %d", __FUNCTION__, port->number);
1377
1378         size = sizeof(struct ti_port_status);
1379         data = kmalloc(size, GFP_KERNEL);
1380         if (!data) {
1381                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1382                 return -ENOMEM;
1383         }
1384
1385         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1386                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1387         if (status) {
1388                 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1389                 goto free_data;
1390         }
1391
1392         dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1393
1394         tport->tp_lsr = data->bLSR;
1395
1396 free_data:
1397         kfree(data);
1398         return status;
1399 }
1400
1401
1402 static int ti_get_serial_info(struct ti_port *tport,
1403         struct serial_struct __user *ret_arg)
1404 {
1405         struct usb_serial_port *port = tport->tp_port;
1406         struct serial_struct ret_serial;
1407
1408         if (!ret_arg)
1409                 return -EFAULT;
1410
1411         memset(&ret_serial, 0, sizeof(ret_serial));
1412
1413         ret_serial.type = PORT_16550A;
1414         ret_serial.line = port->serial->minor;
1415         ret_serial.port = port->number - port->serial->minor;
1416         ret_serial.flags = tport->tp_flags;
1417         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1418         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1419         ret_serial.closing_wait = tport->tp_closing_wait;
1420
1421         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1422                 return -EFAULT;
1423
1424         return 0;
1425 }
1426
1427
1428 static int ti_set_serial_info(struct ti_port *tport,
1429         struct serial_struct __user *new_arg)
1430 {
1431         struct usb_serial_port *port = tport->tp_port;
1432         struct serial_struct new_serial;
1433
1434         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1435                 return -EFAULT;
1436
1437         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1438         if (port->tty)
1439                 port->tty->low_latency =
1440                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1441         tport->tp_closing_wait = new_serial.closing_wait;
1442
1443         return 0;
1444 }
1445
1446
1447 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1448 {
1449         struct async_icount *icount;
1450         struct tty_struct *tty;
1451         unsigned long flags;
1452
1453         dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1454
1455         if (msr & TI_MSR_DELTA_MASK) {
1456                 spin_lock_irqsave(&tport->tp_lock, flags);
1457                 icount = &tport->tp_icount;
1458                 if (msr & TI_MSR_DELTA_CTS)
1459                         icount->cts++;
1460                 if (msr & TI_MSR_DELTA_DSR)
1461                         icount->dsr++;
1462                 if (msr & TI_MSR_DELTA_CD)
1463                         icount->dcd++;
1464                 if (msr & TI_MSR_DELTA_RI)
1465                         icount->rng++;
1466                 wake_up_interruptible(&tport->tp_msr_wait);
1467                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1468         }
1469
1470         tport->tp_msr = msr & TI_MSR_MASK;
1471
1472         /* handle CTS flow control */
1473         tty = tport->tp_port->tty;
1474         if (tty && C_CRTSCTS(tty)) {
1475                 if (msr & TI_MSR_CTS) {
1476                         tty->hw_stopped = 0;
1477                         tty_wakeup(tty);
1478                 } else {
1479                         tty->hw_stopped = 1;
1480                 }
1481         }
1482 }
1483
1484
1485 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1486 {
1487         struct ti_device *tdev = tport->tp_tdev;
1488         struct usb_serial_port *port = tport->tp_port;
1489         wait_queue_t wait;
1490         unsigned long flags;
1491
1492         dbg("%s - port %d", __FUNCTION__, port->number);
1493
1494         spin_lock_irqsave(&tport->tp_lock, flags);
1495
1496         /* wait for data to drain from the buffer */
1497         tdev->td_urb_error = 0;
1498         init_waitqueue_entry(&wait, current);
1499         add_wait_queue(&tport->tp_write_wait, &wait);
1500         for (;;) {
1501                 set_current_state(TASK_INTERRUPTIBLE);
1502                 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1503                 || timeout == 0 || signal_pending(current)
1504                 || tdev->td_urb_error
1505                 || !usb_get_intfdata(port->serial->interface))  /* disconnect */
1506                         break;
1507                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1508                 timeout = schedule_timeout(timeout);
1509                 spin_lock_irqsave(&tport->tp_lock, flags);
1510         }
1511         set_current_state(TASK_RUNNING);
1512         remove_wait_queue(&tport->tp_write_wait, &wait);
1513
1514         /* flush any remaining data in the buffer */
1515         if (flush)
1516                 ti_buf_clear(tport->tp_write_buf);
1517
1518         spin_unlock_irqrestore(&tport->tp_lock, flags);
1519
1520         /* wait for data to drain from the device */
1521         /* wait for empty tx register, plus 20 ms */
1522         timeout += jiffies;
1523         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1524         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1525         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1526         && usb_get_intfdata(port->serial->interface)) {  /* not disconnected */
1527                 if (ti_get_lsr(tport))
1528                         break;
1529                 msleep_interruptible(20);
1530         }
1531 }
1532
1533
1534 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1535 {
1536         unsigned long flags;
1537
1538         spin_lock_irqsave(&tport->tp_lock, flags);
1539
1540         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1541                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1542
1543         spin_unlock_irqrestore(&tport->tp_lock, flags);
1544 }
1545
1546
1547 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1548 {
1549         struct urb *urb;
1550         int status = 0;
1551         unsigned long flags;
1552
1553         spin_lock_irqsave(&tport->tp_lock, flags);
1554
1555         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1556                 urb = tport->tp_port->read_urb;
1557                 urb->complete = ti_bulk_in_callback;
1558                 urb->context = tport;
1559                 urb->dev = tport->tp_port->serial->dev;
1560                 status = usb_submit_urb(urb, GFP_KERNEL);
1561         }
1562         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1563
1564         spin_unlock_irqrestore(&tport->tp_lock, flags);
1565
1566         return status;
1567 }
1568
1569
1570 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1571         __u16 moduleid, __u16 value, __u8 *data, int size)
1572 {
1573         int status;
1574
1575         status = usb_control_msg(tdev->td_serial->dev,
1576                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1577                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1578                 value, moduleid, data, size, 1000);
1579
1580         if (status == size)
1581                 status = 0;
1582
1583         if (status > 0)
1584                 status = -ECOMM;
1585
1586         return status;
1587 }
1588
1589
1590 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1591         __u16 moduleid, __u16 value, __u8 *data, int size)
1592 {
1593         int status;
1594
1595         status = usb_control_msg(tdev->td_serial->dev,
1596                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1597                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1598                 value, moduleid, data, size, 1000);
1599
1600         if (status == size)
1601                 status = 0;
1602
1603         if (status > 0)
1604                 status = -ECOMM;
1605
1606         return status;
1607 }
1608
1609
1610 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1611         __u8 mask, __u8 byte)
1612 {
1613         int status;
1614         unsigned int size;
1615         struct ti_write_data_bytes *data;
1616         struct device *dev = &tdev->td_serial->dev->dev;
1617
1618         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1619
1620         size = sizeof(struct ti_write_data_bytes) + 2;
1621         data = kmalloc(size, GFP_KERNEL);
1622         if (!data) {
1623                 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1624                 return -ENOMEM;
1625         }
1626
1627         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1628         data->bDataType = TI_RW_DATA_BYTE;
1629         data->bDataCounter = 1;
1630         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1631         data->wBaseAddrLo = cpu_to_be16(addr);
1632         data->bData[0] = mask;
1633         data->bData[1] = byte;
1634
1635         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1636                 (__u8 *)data, size);
1637
1638         if (status < 0)
1639                 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1640
1641         kfree(data);
1642
1643         return status;
1644 }
1645
1646
1647 static int ti_download_firmware(struct ti_device *tdev,
1648         unsigned char *firmware, unsigned int firmware_size)
1649 {
1650         int status = 0;
1651         int buffer_size;
1652         int pos;
1653         int len;
1654         int done;
1655         __u8 cs = 0;
1656         __u8 *buffer;
1657         struct usb_device *dev = tdev->td_serial->dev;
1658         struct ti_firmware_header *header;
1659         unsigned int pipe = usb_sndbulkpipe(dev,
1660                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1661
1662
1663         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1664         buffer = kmalloc(buffer_size, GFP_KERNEL);
1665         if (!buffer) {
1666                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1667                 return -ENOMEM;
1668         }
1669
1670         memcpy(buffer, firmware, firmware_size);
1671         memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1672
1673         for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1674                 cs = (__u8)(cs + buffer[pos]);
1675
1676         header = (struct ti_firmware_header *)buffer;
1677         header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1678         header->bCheckSum = cs;
1679
1680         dbg("%s - downloading firmware", __FUNCTION__);
1681         for (pos = 0; pos < buffer_size; pos += done) {
1682                 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1683                 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1684                 if (status)
1685                         break;
1686         }
1687
1688         kfree(buffer);
1689
1690         if (status) {
1691                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1692                 return status;
1693         }
1694
1695         dbg("%s - download successful", __FUNCTION__);
1696
1697         return 0;
1698 }
1699
1700
1701 /* Circular Buffer Functions */
1702
1703 /*
1704  * ti_buf_alloc
1705  *
1706  * Allocate a circular buffer and all associated memory.
1707  */
1708
1709 static struct circ_buf *ti_buf_alloc(void)
1710 {
1711         struct circ_buf *cb;
1712
1713         cb = (struct circ_buf *)kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1714         if (cb == NULL)
1715                 return NULL;
1716
1717         cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1718         if (cb->buf == NULL) {
1719                 kfree(cb);
1720                 return NULL;
1721         }
1722
1723         ti_buf_clear(cb);
1724
1725         return cb;
1726 }
1727
1728
1729 /*
1730  * ti_buf_free
1731  *
1732  * Free the buffer and all associated memory.
1733  */
1734
1735 static void ti_buf_free(struct circ_buf *cb)
1736 {
1737         kfree(cb->buf);
1738         kfree(cb);
1739 }
1740
1741
1742 /*
1743  * ti_buf_clear
1744  *
1745  * Clear out all data in the circular buffer.
1746  */
1747
1748 static void ti_buf_clear(struct circ_buf *cb)
1749 {
1750         cb->head = cb->tail = 0;
1751 }
1752
1753
1754 /*
1755  * ti_buf_data_avail
1756  *
1757  * Return the number of bytes of data available in the circular
1758  * buffer.
1759  */
1760
1761 static int ti_buf_data_avail(struct circ_buf *cb)
1762 {
1763         return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1764 }
1765
1766
1767 /*
1768  * ti_buf_space_avail
1769  *
1770  * Return the number of bytes of space available in the circular
1771  * buffer.
1772  */
1773
1774 static int ti_buf_space_avail(struct circ_buf *cb)
1775 {
1776         return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1777 }
1778
1779
1780 /*
1781  * ti_buf_put
1782  *
1783  * Copy data data from a user buffer and put it into the circular buffer.
1784  * Restrict to the amount of space available.
1785  *
1786  * Return the number of bytes copied.
1787  */
1788
1789 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1790 {
1791         int c, ret = 0;
1792
1793         while (1) {
1794                 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1795                 if (count < c)
1796                         c = count;
1797                 if (c <= 0)
1798                         break;
1799                 memcpy(cb->buf + cb->head, buf, c);
1800                 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1801                 buf += c;
1802                 count -= c;
1803                 ret += c;
1804         }
1805
1806         return ret;
1807 }
1808
1809
1810 /*
1811  * ti_buf_get
1812  *
1813  * Get data from the circular buffer and copy to the given buffer.
1814  * Restrict to the amount of data available.
1815  *
1816  * Return the number of bytes copied.
1817  */
1818
1819 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1820 {
1821         int c, ret = 0;
1822
1823         while (1) {
1824                 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1825                 if (count < c)
1826                         c = count;
1827                 if (c <= 0)
1828                         break;
1829                 memcpy(buf, cb->buf + cb->tail, c);
1830                 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1831                 buf += c;
1832                 count -= c;
1833                 ret += c;
1834         }
1835
1836         return ret;
1837 }