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
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/firmware.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <linux/tty.h>
  27 #include <linux/tty_driver.h>
  28 #include <linux/tty_flip.h>
  29 #include <linux/module.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/ioctl.h>
  32 #include <linux/serial.h>
  33 #include <linux/circ_buf.h>
  34 #include <linux/mutex.h>
  35 #include <linux/uaccess.h>
  36 #include <linux/usb.h>
  37 #include <linux/usb/serial.h>
  38
  39 #include "ti_usb_3410_5052.h"
  40
  41 /* Defines */
  42
  43 #define TI_DRIVER_VERSION       "v0.9"
  44 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  45 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  46
  47 #define TI_FIRMWARE_BUF_SIZE    16284
  48
  49 #define TI_WRITE_BUF_SIZE       1024
  50
  51 #define TI_TRANSFER_TIMEOUT     2
  52
  53 #define TI_DEFAULT_LOW_LATENCY  0
  54 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  55
  56 /* supported setserial flags */
  57 #define TI_SET_SERIAL_FLAGS     (ASYNC_LOW_LATENCY)
  58
  59 /* read urb states */
  60 #define TI_READ_URB_RUNNING     0
  61 #define TI_READ_URB_STOPPING    1
  62 #define TI_READ_URB_STOPPED     2
  63
  64 #define TI_EXTRA_VID_PID_COUNT  5
  65
  66
  67 /* Structures */
  68
  69 struct ti_port {
  70         int                     tp_is_open;
  71         __u8                    tp_msr;
  72         __u8                    tp_lsr;
  73         __u8                    tp_shadow_mcr;
  74         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  75         unsigned int            tp_uart_base_addr;
  76         int                     tp_flags;
  77         int                     tp_closing_wait;/* in .01 secs */
  78         struct async_icount     tp_icount;
  79         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
  80         wait_queue_head_t       tp_write_wait;
  81         struct ti_device        *tp_tdev;
  82         struct usb_serial_port  *tp_port;
  83         spinlock_t              tp_lock;
  84         int                     tp_read_urb_state;
  85         int                     tp_write_urb_in_use;
  86         struct circ_buf         *tp_write_buf;
  87 };
  88
  89 struct ti_device {
  90         struct mutex            td_open_close_lock;
  91         int                     td_open_port_count;
  92         struct usb_serial       *td_serial;
  93         int                     td_is_3410;
  94         int                     td_urb_error;
  95 };
  96
  97
  98 /* Function Declarations */
  99
 100 static int ti_startup(struct usb_serial *serial);
 101 static void ti_shutdown(struct usb_serial *serial);
 102 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port,
 103                 struct file *file);
 104 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
 105                 struct file *file);
 106 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 107                 const unsigned char *data, int count);
 108 static int ti_write_room(struct tty_struct *tty);
 109 static int ti_chars_in_buffer(struct tty_struct *tty);
 110 static void ti_throttle(struct tty_struct *tty);
 111 static void ti_unthrottle(struct tty_struct *tty);
 112 static int ti_ioctl(struct tty_struct *tty, struct file *file,
 113                 unsigned int cmd, unsigned long arg);
 114 static void ti_set_termios(struct tty_struct *tty,
 115                 struct usb_serial_port *port, struct ktermios *old_termios);
 116 static int ti_tiocmget(struct tty_struct *tty, struct file *file);
 117 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
 118                 unsigned int set, unsigned int clear);
 119 static void ti_break(struct tty_struct *tty, int break_state);
 120 static void ti_interrupt_callback(struct urb *urb);
 121 static void ti_bulk_in_callback(struct urb *urb);
 122 static void ti_bulk_out_callback(struct urb *urb);
 123
 124 static void ti_recv(struct device *dev, struct tty_struct *tty,
 125         unsigned char *data, int length);
 126 static void ti_send(struct ti_port *tport);
 127 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 128 static int ti_get_lsr(struct ti_port *tport);
 129 static int ti_get_serial_info(struct ti_port *tport,
 130         struct serial_struct __user *ret_arg);
 131 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 132         struct serial_struct __user *new_arg);
 133 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 134
 135 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 136
 137 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 138 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 139
 140 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 141         __u16 moduleid, __u16 value, __u8 *data, int size);
 142 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 143         __u16 moduleid, __u16 value, __u8 *data, int size);
 144
 145 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 146         __u8 mask, __u8 byte);
 147
 148 static int ti_download_firmware(struct ti_device *tdev);
 149
 150 /* circular buffer */
 151 static struct circ_buf *ti_buf_alloc(void);
 152 static void ti_buf_free(struct circ_buf *cb);
 153 static void ti_buf_clear(struct circ_buf *cb);
 154 static int ti_buf_data_avail(struct circ_buf *cb);
 155 static int ti_buf_space_avail(struct circ_buf *cb);
 156 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
 157 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
 158
 159
 160 /* Data */
 161
 162 /* module parameters */
 163 static int debug;
 164 static int low_latency = TI_DEFAULT_LOW_LATENCY;
 165 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 166 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 167 static unsigned int vendor_3410_count;
 168 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 169 static unsigned int product_3410_count;
 170 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 171 static unsigned int vendor_5052_count;
 172 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 173 static unsigned int product_5052_count;
 174
 175 /* supported devices */
 176 /* the array dimension is the number of default entries plus */
 177 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 178 /* null entry */
 179 static struct usb_device_id ti_id_table_3410[2+TI_EXTRA_VID_PID_COUNT+1] = {
 180         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 181         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 182 };
 183
 184 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
 185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 189 };
 190
 191 static struct usb_device_id ti_id_table_combined[6+2*TI_EXTRA_VID_PID_COUNT+1] = {
 192         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 195         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 196         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 197         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 198         { }
 199 };
 200
 201 static struct usb_driver ti_usb_driver = {
 202         .name                   = "ti_usb_3410_5052",
 203         .probe                  = usb_serial_probe,
 204         .disconnect             = usb_serial_disconnect,
 205         .id_table               = ti_id_table_combined,
 206         .no_dynamic_id =        1,
 207 };
 208
 209 static struct usb_serial_driver ti_1port_device = {
 210         .driver = {
 211                 .owner          = THIS_MODULE,
 212                 .name           = "ti_usb_3410_5052_1",
 213         },
 214         .description            = "TI USB 3410 1 port adapter",
 215         .usb_driver             = &ti_usb_driver,
 216         .id_table               = ti_id_table_3410,
 217         .num_ports              = 1,
 218         .attach                 = ti_startup,
 219         .shutdown               = ti_shutdown,
 220         .open                   = ti_open,
 221         .close                  = ti_close,
 222         .write                  = ti_write,
 223         .write_room             = ti_write_room,
 224         .chars_in_buffer        = ti_chars_in_buffer,
 225         .throttle               = ti_throttle,
 226         .unthrottle             = ti_unthrottle,
 227         .ioctl                  = ti_ioctl,
 228         .set_termios            = ti_set_termios,
 229         .tiocmget               = ti_tiocmget,
 230         .tiocmset               = ti_tiocmset,
 231         .break_ctl              = ti_break,
 232         .read_int_callback      = ti_interrupt_callback,
 233         .read_bulk_callback     = ti_bulk_in_callback,
 234         .write_bulk_callback    = ti_bulk_out_callback,
 235 };
 236
 237 static struct usb_serial_driver ti_2port_device = {
 238         .driver = {
 239                 .owner          = THIS_MODULE,
 240                 .name           = "ti_usb_3410_5052_2",
 241         },
 242         .description            = "TI USB 5052 2 port adapter",
 243         .usb_driver             = &ti_usb_driver,
 244         .id_table               = ti_id_table_5052,
 245         .num_ports              = 2,
 246         .attach                 = ti_startup,
 247         .shutdown               = ti_shutdown,
 248         .open                   = ti_open,
 249         .close                  = ti_close,
 250         .write                  = ti_write,
 251         .write_room             = ti_write_room,
 252         .chars_in_buffer        = ti_chars_in_buffer,
 253         .throttle               = ti_throttle,
 254         .unthrottle             = ti_unthrottle,
 255         .ioctl                  = ti_ioctl,
 256         .set_termios            = ti_set_termios,
 257         .tiocmget               = ti_tiocmget,
 258         .tiocmset               = ti_tiocmset,
 259         .break_ctl              = ti_break,
 260         .read_int_callback      = ti_interrupt_callback,
 261         .read_bulk_callback     = ti_bulk_in_callback,
 262         .write_bulk_callback    = ti_bulk_out_callback,
 263 };
 264
 265
 266 /* Module */
 267
 268 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 269 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 270 MODULE_VERSION(TI_DRIVER_VERSION);
 271 MODULE_LICENSE("GPL");
 272
 273 MODULE_FIRMWARE("ti_3410.fw");
 274 MODULE_FIRMWARE("ti_5052.fw");
 275
 276 module_param(debug, bool, S_IRUGO | S_IWUSR);
 277 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 278
 279 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
 280 MODULE_PARM_DESC(low_latency,
 281                 "TTY low_latency flag, 0=off, 1=on, default is off");
 282
 283 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 284 MODULE_PARM_DESC(closing_wait,
 285     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 286
 287 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 288 MODULE_PARM_DESC(vendor_3410,
 289                 "Vendor ids for 3410 based devices, 1-5 short integers");
 290 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 291 MODULE_PARM_DESC(product_3410,
 292                 "Product ids for 3410 based devices, 1-5 short integers");
 293 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 294 MODULE_PARM_DESC(vendor_5052,
 295                 "Vendor ids for 5052 based devices, 1-5 short integers");
 296 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 297 MODULE_PARM_DESC(product_5052,
 298                 "Product ids for 5052 based devices, 1-5 short integers");
 299
 300 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 301
 302
 303 /* Functions */
 304
 305 static int __init ti_init(void)
 306 {
 307         int i, j, c;
 308         int ret;
 309
 310         /* insert extra vendor and product ids */
 311         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 312         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 313         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 314                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 315                 ti_id_table_3410[j].idProduct = product_3410[i];
 316                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 317                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 318                 ti_id_table_combined[c].idProduct = product_3410[i];
 319                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 320         }
 321         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 322         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 323                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 324                 ti_id_table_5052[j].idProduct = product_5052[i];
 325                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 326                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 327                 ti_id_table_combined[c].idProduct = product_5052[i];
 328                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 329         }
 330
 331         ret = usb_serial_register(&ti_1port_device);
 332         if (ret)
 333                 goto failed_1port;
 334         ret = usb_serial_register(&ti_2port_device);
 335         if (ret)
 336                 goto failed_2port;
 337
 338         ret = usb_register(&ti_usb_driver);
 339         if (ret)
 340                 goto failed_usb;
 341
 342         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 343                TI_DRIVER_DESC "\n");
 344
 345         return 0;
 346
 347 failed_usb:
 348         usb_serial_deregister(&ti_2port_device);
 349 failed_2port:
 350         usb_serial_deregister(&ti_1port_device);
 351 failed_1port:
 352         return ret;
 353 }
 354
 355
 356 static void __exit ti_exit(void)
 357 {
 358         usb_serial_deregister(&ti_1port_device);
 359         usb_serial_deregister(&ti_2port_device);
 360         usb_deregister(&ti_usb_driver);
 361 }
 362
 363
 364 module_init(ti_init);
 365 module_exit(ti_exit);
 366
 367
 368 static int ti_startup(struct usb_serial *serial)
 369 {
 370         struct ti_device *tdev;
 371         struct ti_port *tport;
 372         struct usb_device *dev = serial->dev;
 373         int status;
 374         int i;
 375
 376
 377         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 378             __func__, le16_to_cpu(dev->descriptor.idProduct),
 379             dev->descriptor.bNumConfigurations,
 380             dev->actconfig->desc.bConfigurationValue);
 381
 382         /* create device structure */
 383         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 384         if (tdev == NULL) {
 385                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 386                 return -ENOMEM;
 387         }
 388         mutex_init(&tdev->td_open_close_lock);
 389         tdev->td_serial = serial;
 390         usb_set_serial_data(serial, tdev);
 391
 392         /* determine device type */
 393         if (usb_match_id(serial->interface, ti_id_table_3410))
 394                 tdev->td_is_3410 = 1;
 395         dbg("%s - device type is %s", __func__,
 396                                 tdev->td_is_3410 ? "3410" : "5052");
 397
 398         /* if we have only 1 configuration, download firmware */
 399         if (dev->descriptor.bNumConfigurations == 1) {
 400                 if ((status = ti_download_firmware(tdev)) != 0)
 401                         goto free_tdev;
 402
 403                 /* 3410 must be reset, 5052 resets itself */
 404                 if (tdev->td_is_3410) {
 405                         msleep_interruptible(100);
 406                         usb_reset_device(dev);
 407                 }
 408
 409                 status = -ENODEV;
 410                 goto free_tdev;
 411         }
 412
 413         /* the second configuration must be set */
 414         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 415                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 416                 status = status ? status : -ENODEV;
 417                 goto free_tdev;
 418         }
 419
 420         /* set up port structures */
 421         for (i = 0; i < serial->num_ports; ++i) {
 422                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 423                 if (tport == NULL) {
 424                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 425                         status = -ENOMEM;
 426                         goto free_tports;
 427                 }
 428                 spin_lock_init(&tport->tp_lock);
 429                 tport->tp_uart_base_addr = (i == 0 ?
 430                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 431                 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
 432                 tport->tp_closing_wait = closing_wait;
 433                 init_waitqueue_head(&tport->tp_msr_wait);
 434                 init_waitqueue_head(&tport->tp_write_wait);
 435                 tport->tp_write_buf = ti_buf_alloc();
 436                 if (tport->tp_write_buf == NULL) {
 437                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 438                         kfree(tport);
 439                         status = -ENOMEM;
 440                         goto free_tports;
 441                 }
 442                 tport->tp_port = serial->port[i];
 443                 tport->tp_tdev = tdev;
 444                 usb_set_serial_port_data(serial->port[i], tport);
 445                 tport->tp_uart_mode = 0;        /* default is RS232 */
 446         }
 447
 448         return 0;
 449
 450 free_tports:
 451         for (--i; i >= 0; --i) {
 452                 tport = usb_get_serial_port_data(serial->port[i]);
 453                 ti_buf_free(tport->tp_write_buf);
 454                 kfree(tport);
 455                 usb_set_serial_port_data(serial->port[i], NULL);
 456         }
 457 free_tdev:
 458         kfree(tdev);
 459         usb_set_serial_data(serial, NULL);
 460         return status;
 461 }
 462
 463
 464 static void ti_shutdown(struct usb_serial *serial)
 465 {
 466         int i;
 467         struct ti_device *tdev = usb_get_serial_data(serial);
 468         struct ti_port *tport;
 469
 470         dbg("%s", __func__);
 471
 472         for (i = 0; i < serial->num_ports; ++i) {
 473                 tport = usb_get_serial_port_data(serial->port[i]);
 474                 if (tport) {
 475                         ti_buf_free(tport->tp_write_buf);
 476                         kfree(tport);
 477                         usb_set_serial_port_data(serial->port[i], NULL);
 478                 }
 479         }
 480
 481         kfree(tdev);
 482         usb_set_serial_data(serial, NULL);
 483 }
 484
 485
 486 static int ti_open(struct tty_struct *tty,
 487                         struct usb_serial_port *port, struct file *file)
 488 {
 489         struct ti_port *tport = usb_get_serial_port_data(port);
 490         struct ti_device *tdev;
 491         struct usb_device *dev;
 492         struct urb *urb;
 493         int port_number;
 494         int status;
 495         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 496                              TI_PIPE_TIMEOUT_ENABLE |
 497                              (TI_TRANSFER_TIMEOUT << 2));
 498
 499         dbg("%s - port %d", __func__, port->number);
 500
 501         if (tport == NULL)
 502                 return -ENODEV;
 503
 504         dev = port->serial->dev;
 505         tdev = tport->tp_tdev;
 506
 507         /* only one open on any port on a device at a time */
 508         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 509                 return -ERESTARTSYS;
 510
 511         if (tty)
 512                 tty->low_latency =
 513                                 (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 514
 515         port_number = port->number - port->serial->minor;
 516
 517         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 518
 519         tport->tp_msr = 0;
 520         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 521
 522         /* start interrupt urb the first time a port is opened on this device */
 523         if (tdev->td_open_port_count == 0) {
 524                 dbg("%s - start interrupt in urb", __func__);
 525                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 526                 if (!urb) {
 527                         dev_err(&port->dev, "%s - no interrupt urb\n",
 528                                                                 __func__);
 529                         status = -EINVAL;
 530                         goto release_lock;
 531                 }
 532                 urb->complete = ti_interrupt_callback;
 533                 urb->context = tdev;
 534                 urb->dev = dev;
 535                 status = usb_submit_urb(urb, GFP_KERNEL);
 536                 if (status) {
 537                         dev_err(&port->dev,
 538                                 "%s - submit interrupt urb failed, %d\n",
 539                                         __func__, status);
 540                         goto release_lock;
 541                 }
 542         }
 543
 544         if (tty)
 545                 ti_set_termios(tty, port, tty->termios);
 546
 547         dbg("%s - sending TI_OPEN_PORT", __func__);
 548         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 549                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 550         if (status) {
 551                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 552                                                         __func__, status);
 553                 goto unlink_int_urb;
 554         }
 555
 556         dbg("%s - sending TI_START_PORT", __func__);
 557         status = ti_command_out_sync(tdev, TI_START_PORT,
 558                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 559         if (status) {
 560                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 561                                                         __func__, status);
 562                 goto unlink_int_urb;
 563         }
 564
 565         dbg("%s - sending TI_PURGE_PORT", __func__);
 566         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 567                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 568         if (status) {
 569                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 570                                                         __func__, status);
 571                 goto unlink_int_urb;
 572         }
 573         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 574                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 575         if (status) {
 576                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 577                                                         __func__, status);
 578                 goto unlink_int_urb;
 579         }
 580
 581         /* reset the data toggle on the bulk endpoints to work around bug in
 582          * host controllers where things get out of sync some times */
 583         usb_clear_halt(dev, port->write_urb->pipe);
 584         usb_clear_halt(dev, port->read_urb->pipe);
 585
 586         if (tty)
 587                 ti_set_termios(tty, port, tty->termios);
 588
 589         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 590         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 591                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 592         if (status) {
 593                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 594                                                         __func__, status);
 595                 goto unlink_int_urb;
 596         }
 597
 598         dbg("%s - sending TI_START_PORT (2)", __func__);
 599         status = ti_command_out_sync(tdev, TI_START_PORT,
 600                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 601         if (status) {
 602                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 603                                                         __func__, status);
 604                 goto unlink_int_urb;
 605         }
 606
 607         /* start read urb */
 608         dbg("%s - start read urb", __func__);
 609         urb = port->read_urb;
 610         if (!urb) {
 611                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 612                 status = -EINVAL;
 613                 goto unlink_int_urb;
 614         }
 615         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 616         urb->complete = ti_bulk_in_callback;
 617         urb->context = tport;
 618         urb->dev = dev;
 619         status = usb_submit_urb(urb, GFP_KERNEL);
 620         if (status) {
 621                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 622                                                         __func__, status);
 623                 goto unlink_int_urb;
 624         }
 625
 626         tport->tp_is_open = 1;
 627         ++tdev->td_open_port_count;
 628
 629         goto release_lock;
 630
 631 unlink_int_urb:
 632         if (tdev->td_open_port_count == 0)
 633                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 634 release_lock:
 635         mutex_unlock(&tdev->td_open_close_lock);
 636         dbg("%s - exit %d", __func__, status);
 637         return status;
 638 }
 639
 640
 641 static void ti_close(struct tty_struct *tty, struct usb_serial_port *port,
 642                                                         struct file *file)
 643 {
 644         struct ti_device *tdev;
 645         struct ti_port *tport;
 646         int port_number;
 647         int status;
 648         int do_unlock;
 649
 650         dbg("%s - port %d", __func__, port->number);
 651
 652         tdev = usb_get_serial_data(port->serial);
 653         tport = usb_get_serial_port_data(port);
 654         if (tdev == NULL || tport == NULL)
 655                 return;
 656
 657         tport->tp_is_open = 0;
 658
 659         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 660
 661         usb_kill_urb(port->read_urb);
 662         usb_kill_urb(port->write_urb);
 663         tport->tp_write_urb_in_use = 0;
 664
 665         port_number = port->number - port->serial->minor;
 666
 667         dbg("%s - sending TI_CLOSE_PORT", __func__);
 668         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 669                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 670         if (status)
 671                 dev_err(&port->dev,
 672                         "%s - cannot send close port command, %d\n"
 673                                                         , __func__, status);
 674
 675         /* if mutex_lock is interrupted, continue anyway */
 676         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 677         --tport->tp_tdev->td_open_port_count;
 678         if (tport->tp_tdev->td_open_port_count <= 0) {
 679                 /* last port is closed, shut down interrupt urb */
 680                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 681                 tport->tp_tdev->td_open_port_count = 0;
 682         }
 683         if (do_unlock)
 684                 mutex_unlock(&tdev->td_open_close_lock);
 685
 686         dbg("%s - exit", __func__);
 687 }
 688
 689
 690 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 691                         const unsigned char *data, int count)
 692 {
 693         struct ti_port *tport = usb_get_serial_port_data(port);
 694         unsigned long flags;
 695
 696         dbg("%s - port %d", __func__, port->number);
 697
 698         if (count == 0) {
 699                 dbg("%s - write request of 0 bytes", __func__);
 700                 return 0;
 701         }
 702
 703         if (tport == NULL || !tport->tp_is_open)
 704                 return -ENODEV;
 705
 706         spin_lock_irqsave(&tport->tp_lock, flags);
 707         count = ti_buf_put(tport->tp_write_buf, data, count);
 708         spin_unlock_irqrestore(&tport->tp_lock, flags);
 709
 710         ti_send(tport);
 711
 712         return count;
 713 }
 714
 715
 716 static int ti_write_room(struct tty_struct *tty)
 717 {
 718         struct usb_serial_port *port = tty->driver_data;
 719         struct ti_port *tport = usb_get_serial_port_data(port);
 720         int room = 0;
 721         unsigned long flags;
 722
 723         dbg("%s - port %d", __func__, port->number);
 724
 725         if (tport == NULL)
 726                 return -ENODEV;
 727
 728         spin_lock_irqsave(&tport->tp_lock, flags);
 729         room = ti_buf_space_avail(tport->tp_write_buf);
 730         spin_unlock_irqrestore(&tport->tp_lock, flags);
 731
 732         dbg("%s - returns %d", __func__, room);
 733         return room;
 734 }
 735
 736
 737 static int ti_chars_in_buffer(struct tty_struct *tty)
 738 {
 739         struct usb_serial_port *port = tty->driver_data;
 740         struct ti_port *tport = usb_get_serial_port_data(port);
 741         int chars = 0;
 742         unsigned long flags;
 743
 744         dbg("%s - port %d", __func__, port->number);
 745
 746         if (tport == NULL)
 747                 return -ENODEV;
 748
 749         spin_lock_irqsave(&tport->tp_lock, flags);
 750         chars = ti_buf_data_avail(tport->tp_write_buf);
 751         spin_unlock_irqrestore(&tport->tp_lock, flags);
 752
 753         dbg("%s - returns %d", __func__, chars);
 754         return chars;
 755 }
 756
 757
 758 static void ti_throttle(struct tty_struct *tty)
 759 {
 760         struct usb_serial_port *port = tty->driver_data;
 761         struct ti_port *tport = usb_get_serial_port_data(port);
 762
 763         dbg("%s - port %d", __func__, port->number);
 764
 765         if (tport == NULL)
 766                 return;
 767
 768         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 769                 ti_stop_read(tport, tty);
 770
 771 }
 772
 773
 774 static void ti_unthrottle(struct tty_struct *tty)
 775 {
 776         struct usb_serial_port *port = tty->driver_data;
 777         struct ti_port *tport = usb_get_serial_port_data(port);
 778         int status;
 779
 780         dbg("%s - port %d", __func__, port->number);
 781
 782         if (tport == NULL)
 783                 return;
 784
 785         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 786                 status = ti_restart_read(tport, tty);
 787                 if (status)
 788                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 789                                                         __func__, status);
 790         }
 791 }
 792
 793
 794 static int ti_ioctl(struct tty_struct *tty, struct file *file,
 795         unsigned int cmd, unsigned long arg)
 796 {
 797         struct usb_serial_port *port = tty->driver_data;
 798         struct ti_port *tport = usb_get_serial_port_data(port);
 799         struct async_icount cnow;
 800         struct async_icount cprev;
 801
 802         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 803
 804         if (tport == NULL)
 805                 return -ENODEV;
 806
 807         switch (cmd) {
 808         case TIOCGSERIAL:
 809                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 810                 return ti_get_serial_info(tport,
 811                                 (struct serial_struct __user *)arg);
 812         case TIOCSSERIAL:
 813                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 814                 return ti_set_serial_info(tty, tport,
 815                                 (struct serial_struct __user *)arg);
 816         case TIOCMIWAIT:
 817                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 818                 cprev = tport->tp_icount;
 819                 while (1) {
 820                         interruptible_sleep_on(&tport->tp_msr_wait);
 821                         if (signal_pending(current))
 822                                 return -ERESTARTSYS;
 823                         cnow = tport->tp_icount;
 824                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 825                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 826                                 return -EIO; /* no change => error */
 827                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 828                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 829                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 830                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 831                                 return 0;
 832                         cprev = cnow;
 833                 }
 834                 break;
 835         case TIOCGICOUNT:
 836                 dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 837                                 __func__, port->number,
 838                                 tport->tp_icount.rx, tport->tp_icount.tx);
 839                 if (copy_to_user((void __user *)arg, &tport->tp_icount,
 840                                         sizeof(tport->tp_icount)))
 841                         return -EFAULT;
 842                 return 0;
 843         }
 844         return -ENOIOCTLCMD;
 845 }
 846
 847
 848 static void ti_set_termios(struct tty_struct *tty,
 849                 struct usb_serial_port *port, struct ktermios *old_termios)
 850 {
 851         struct ti_port *tport = usb_get_serial_port_data(port);
 852         struct ti_uart_config *config;
 853         tcflag_t cflag, iflag;
 854         int baud;
 855         int status;
 856         int port_number = port->number - port->serial->minor;
 857         unsigned int mcr;
 858
 859         dbg("%s - port %d", __func__, port->number);
 860
 861         cflag = tty->termios->c_cflag;
 862         iflag = tty->termios->c_iflag;
 863
 864         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 865         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 866                                 old_termios->c_cflag, old_termios->c_iflag);
 867
 868         if (tport == NULL)
 869                 return;
 870
 871         config = kmalloc(sizeof(*config), GFP_KERNEL);
 872         if (!config) {
 873                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 874                 return;
 875         }
 876
 877         config->wFlags = 0;
 878
 879         /* these flags must be set */
 880         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 881         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 882         config->bUartMode = (__u8)(tport->tp_uart_mode);
 883
 884         switch (cflag & CSIZE) {
 885         case CS5:
 886                     config->bDataBits = TI_UART_5_DATA_BITS;
 887                     break;
 888         case CS6:
 889                     config->bDataBits = TI_UART_6_DATA_BITS;
 890                     break;
 891         case CS7:
 892                     config->bDataBits = TI_UART_7_DATA_BITS;
 893                     break;
 894         default:
 895         case CS8:
 896                     config->bDataBits = TI_UART_8_DATA_BITS;
 897                     break;
 898         }
 899
 900         /* CMSPAR isn't supported by this driver */
 901         tty->termios->c_cflag &= ~CMSPAR;
 902
 903         if (cflag & PARENB) {
 904                 if (cflag & PARODD) {
 905                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 906                         config->bParity = TI_UART_ODD_PARITY;
 907                 } else {
 908                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 909                         config->bParity = TI_UART_EVEN_PARITY;
 910                 }
 911         } else {
 912                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 913                 config->bParity = TI_UART_NO_PARITY;
 914         }
 915
 916         if (cflag & CSTOPB)
 917                 config->bStopBits = TI_UART_2_STOP_BITS;
 918         else
 919                 config->bStopBits = TI_UART_1_STOP_BITS;
 920
 921         if (cflag & CRTSCTS) {
 922                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 923                 if ((cflag & CBAUD) != B0)
 924                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 925                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 926         } else {
 927                 tty->hw_stopped = 0;
 928                 ti_restart_read(tport, tty);
 929         }
 930
 931         if (I_IXOFF(tty) || I_IXON(tty)) {
 932                 config->cXon  = START_CHAR(tty);
 933                 config->cXoff = STOP_CHAR(tty);
 934
 935                 if (I_IXOFF(tty))
 936                         config->wFlags |= TI_UART_ENABLE_X_IN;
 937                 else
 938                         ti_restart_read(tport, tty);
 939
 940                 if (I_IXON(tty))
 941                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 942         }
 943
 944         baud = tty_get_baud_rate(tty);
 945         if (!baud)
 946                 baud = 9600;
 947         if (tport->tp_tdev->td_is_3410)
 948                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 949         else
 950                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 951
 952         /* FIXME: Should calculate resulting baud here and report it back */
 953         if ((cflag & CBAUD) != B0)
 954                 tty_encode_baud_rate(tty, baud, baud);
 955
 956         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 957         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 958
 959         cpu_to_be16s(&config->wBaudRate);
 960         cpu_to_be16s(&config->wFlags);
 961
 962         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 963                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 964                 sizeof(*config));
 965         if (status)
 966                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 967                                         __func__, port_number, status);
 968
 969         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 970         mcr = tport->tp_shadow_mcr;
 971         /* if baud rate is B0, clear RTS and DTR */
 972         if ((cflag & CBAUD) == B0)
 973                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 974         status = ti_set_mcr(tport, mcr);
 975         if (status)
 976                 dev_err(&port->dev,
 977                         "%s - cannot set modem control on port %d, %d\n",
 978                                                 __func__, port_number, status);
 979
 980         kfree(config);
 981 }
 982
 983
 984 static int ti_tiocmget(struct tty_struct *tty, struct file *file)
 985 {
 986         struct usb_serial_port *port = tty->driver_data;
 987         struct ti_port *tport = usb_get_serial_port_data(port);
 988         unsigned int result;
 989         unsigned int msr;
 990         unsigned int mcr;
 991         unsigned long flags;
 992
 993         dbg("%s - port %d", __func__, port->number);
 994
 995         if (tport == NULL)
 996                 return -ENODEV;
 997
 998         spin_lock_irqsave(&tport->tp_lock, flags);
 999         msr = tport->tp_msr;
1000         mcr = tport->tp_shadow_mcr;
1001         spin_unlock_irqrestore(&tport->tp_lock, flags);
1002
1003         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1004                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1005                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1006                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1007                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1008                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1009                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1010
1011         dbg("%s - 0x%04X", __func__, result);
1012
1013         return result;
1014 }
1015
1016
1017 static int ti_tiocmset(struct tty_struct *tty, struct file *file,
1018         unsigned int set, unsigned int clear)
1019 {
1020         struct usb_serial_port *port = tty->driver_data;
1021         struct ti_port *tport = usb_get_serial_port_data(port);
1022         unsigned int mcr;
1023         unsigned long flags;
1024
1025         dbg("%s - port %d", __func__, port->number);
1026
1027         if (tport == NULL)
1028                 return -ENODEV;
1029
1030         spin_lock_irqsave(&tport->tp_lock, flags);
1031         mcr = tport->tp_shadow_mcr;
1032
1033         if (set & TIOCM_RTS)
1034                 mcr |= TI_MCR_RTS;
1035         if (set & TIOCM_DTR)
1036                 mcr |= TI_MCR_DTR;
1037         if (set & TIOCM_LOOP)
1038                 mcr |= TI_MCR_LOOP;
1039
1040         if (clear & TIOCM_RTS)
1041                 mcr &= ~TI_MCR_RTS;
1042         if (clear & TIOCM_DTR)
1043                 mcr &= ~TI_MCR_DTR;
1044         if (clear & TIOCM_LOOP)
1045                 mcr &= ~TI_MCR_LOOP;
1046         spin_unlock_irqrestore(&tport->tp_lock, flags);
1047
1048         return ti_set_mcr(tport, mcr);
1049 }
1050
1051
1052 static void ti_break(struct tty_struct *tty, int break_state)
1053 {
1054         struct usb_serial_port *port = tty->driver_data;
1055         struct ti_port *tport = usb_get_serial_port_data(port);
1056         int status;
1057
1058         dbg("%s - state = %d", __func__, break_state);
1059
1060         if (tport == NULL)
1061                 return;
1062
1063         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1064
1065         status = ti_write_byte(tport->tp_tdev,
1066                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1067                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1068
1069         if (status)
1070                 dbg("%s - error setting break, %d", __func__, status);
1071 }
1072
1073
1074 static void ti_interrupt_callback(struct urb *urb)
1075 {
1076         struct ti_device *tdev = urb->context;
1077         struct usb_serial_port *port;
1078         struct usb_serial *serial = tdev->td_serial;
1079         struct ti_port *tport;
1080         struct device *dev = &urb->dev->dev;
1081         unsigned char *data = urb->transfer_buffer;
1082         int length = urb->actual_length;
1083         int port_number;
1084         int function;
1085         int status = urb->status;
1086         int retval;
1087         __u8 msr;
1088
1089         dbg("%s", __func__);
1090
1091         switch (status) {
1092         case 0:
1093                 break;
1094         case -ECONNRESET:
1095         case -ENOENT:
1096         case -ESHUTDOWN:
1097                 dbg("%s - urb shutting down, %d", __func__, status);
1098                 tdev->td_urb_error = 1;
1099                 return;
1100         default:
1101                 dev_err(dev, "%s - nonzero urb status, %d\n",
1102                         __func__, status);
1103                 tdev->td_urb_error = 1;
1104                 goto exit;
1105         }
1106
1107         if (length != 2) {
1108                 dbg("%s - bad packet size, %d", __func__, length);
1109                 goto exit;
1110         }
1111
1112         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1113                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1114                 goto exit;
1115         }
1116
1117         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1118         function = TI_GET_FUNC_FROM_CODE(data[0]);
1119
1120         dbg("%s - port_number %d, function %d, data 0x%02X",
1121                                 __func__, port_number, function, data[1]);
1122
1123         if (port_number >= serial->num_ports) {
1124                 dev_err(dev, "%s - bad port number, %d\n",
1125                                                 __func__, port_number);
1126                 goto exit;
1127         }
1128
1129         port = serial->port[port_number];
1130
1131         tport = usb_get_serial_port_data(port);
1132         if (!tport)
1133                 goto exit;
1134
1135         switch (function) {
1136         case TI_CODE_DATA_ERROR:
1137                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1138                                         __func__, port_number, data[1]);
1139                 break;
1140
1141         case TI_CODE_MODEM_STATUS:
1142                 msr = data[1];
1143                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1144                 ti_handle_new_msr(tport, msr);
1145                 break;
1146
1147         default:
1148                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1149                                                         __func__, data[1]);
1150                 break;
1151         }
1152
1153 exit:
1154         retval = usb_submit_urb(urb, GFP_ATOMIC);
1155         if (retval)
1156                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1157                         __func__, retval);
1158 }
1159
1160
1161 static void ti_bulk_in_callback(struct urb *urb)
1162 {
1163         struct ti_port *tport = urb->context;
1164         struct usb_serial_port *port = tport->tp_port;
1165         struct device *dev = &urb->dev->dev;
1166         int status = urb->status;
1167         int retval = 0;
1168         struct tty_struct *tty;
1169
1170         dbg("%s", __func__);
1171
1172         switch (status) {
1173         case 0:
1174                 break;
1175         case -ECONNRESET:
1176         case -ENOENT:
1177         case -ESHUTDOWN:
1178                 dbg("%s - urb shutting down, %d", __func__, status);
1179                 tport->tp_tdev->td_urb_error = 1;
1180                 wake_up_interruptible(&tport->tp_write_wait);
1181                 return;
1182         default:
1183                 dev_err(dev, "%s - nonzero urb status, %d\n",
1184                         __func__, status);
1185                 tport->tp_tdev->td_urb_error = 1;
1186                 wake_up_interruptible(&tport->tp_write_wait);
1187         }
1188
1189         if (status == -EPIPE)
1190                 goto exit;
1191
1192         if (status) {
1193                 dev_err(dev, "%s - stopping read!\n", __func__);
1194                 return;
1195         }
1196
1197         tty = tty_port_tty_get(&port->port);
1198         if (tty && urb->actual_length) {
1199                 usb_serial_debug_data(debug, dev, __func__,
1200                         urb->actual_length, urb->transfer_buffer);
1201
1202                 if (!tport->tp_is_open)
1203                         dbg("%s - port closed, dropping data", __func__);
1204                 else
1205                         ti_recv(&urb->dev->dev, tty,
1206                                                 urb->transfer_buffer,
1207                                                 urb->actual_length);
1208
1209                 spin_lock(&tport->tp_lock);
1210                 tport->tp_icount.rx += urb->actual_length;
1211                 spin_unlock(&tport->tp_lock);
1212                 tty_kref_put(tty);
1213         }
1214
1215 exit:
1216         /* continue to read unless stopping */
1217         spin_lock(&tport->tp_lock);
1218         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1219                 urb->dev = port->serial->dev;
1220                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1221         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1222                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1223         }
1224         spin_unlock(&tport->tp_lock);
1225         if (retval)
1226                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1227                         __func__, retval);
1228 }
1229
1230
1231 static void ti_bulk_out_callback(struct urb *urb)
1232 {
1233         struct ti_port *tport = urb->context;
1234         struct usb_serial_port *port = tport->tp_port;
1235         struct device *dev = &urb->dev->dev;
1236         int status = urb->status;
1237
1238         dbg("%s - port %d", __func__, port->number);
1239
1240         tport->tp_write_urb_in_use = 0;
1241
1242         switch (status) {
1243         case 0:
1244                 break;
1245         case -ECONNRESET:
1246         case -ENOENT:
1247         case -ESHUTDOWN:
1248                 dbg("%s - urb shutting down, %d", __func__, status);
1249                 tport->tp_tdev->td_urb_error = 1;
1250                 wake_up_interruptible(&tport->tp_write_wait);
1251                 return;
1252         default:
1253                 dev_err(dev, "%s - nonzero urb status, %d\n",
1254                         __func__, status);
1255                 tport->tp_tdev->td_urb_error = 1;
1256                 wake_up_interruptible(&tport->tp_write_wait);
1257         }
1258
1259         /* send any buffered data */
1260         ti_send(tport);
1261 }
1262
1263
1264 static void ti_recv(struct device *dev, struct tty_struct *tty,
1265         unsigned char *data, int length)
1266 {
1267         int cnt;
1268
1269         do {
1270                 cnt = tty_buffer_request_room(tty, length);
1271                 if (cnt < length) {
1272                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1273                                                 __func__, length - cnt);
1274                         if (cnt == 0)
1275                                 break;
1276                 }
1277                 tty_insert_flip_string(tty, data, cnt);
1278                 tty_flip_buffer_push(tty);
1279                 data += cnt;
1280                 length -= cnt;
1281         } while (length > 0);
1282
1283 }
1284
1285
1286 static void ti_send(struct ti_port *tport)
1287 {
1288         int count, result;
1289         struct usb_serial_port *port = tport->tp_port;
1290         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1291         unsigned long flags;
1292
1293
1294         dbg("%s - port %d", __func__, port->number);
1295
1296         spin_lock_irqsave(&tport->tp_lock, flags);
1297
1298         if (tport->tp_write_urb_in_use)
1299                 goto unlock;
1300
1301         count = ti_buf_get(tport->tp_write_buf,
1302                                 port->write_urb->transfer_buffer,
1303                                 port->bulk_out_size);
1304
1305         if (count == 0)
1306                 goto unlock;
1307
1308         tport->tp_write_urb_in_use = 1;
1309
1310         spin_unlock_irqrestore(&tport->tp_lock, flags);
1311
1312         usb_serial_debug_data(debug, &port->dev, __func__, count,
1313                                         port->write_urb->transfer_buffer);
1314
1315         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1316                            usb_sndbulkpipe(port->serial->dev,
1317                                             port->bulk_out_endpointAddress),
1318                            port->write_urb->transfer_buffer, count,
1319                            ti_bulk_out_callback, tport);
1320
1321         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1322         if (result) {
1323                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1324                                                         __func__, result);
1325                 tport->tp_write_urb_in_use = 0;
1326                 /* TODO: reschedule ti_send */
1327         } else {
1328                 spin_lock_irqsave(&tport->tp_lock, flags);
1329                 tport->tp_icount.tx += count;
1330                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1331         }
1332
1333         /* more room in the buffer for new writes, wakeup */
1334         if (tty)
1335                 tty_wakeup(tty);
1336         tty_kref_put(tty);
1337         wake_up_interruptible(&tport->tp_write_wait);
1338         return;
1339 unlock:
1340         spin_unlock_irqrestore(&tport->tp_lock, flags);
1341         tty_kref_put(tty);
1342         return;
1343 }
1344
1345
1346 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1347 {
1348         unsigned long flags;
1349         int status;
1350
1351         status = ti_write_byte(tport->tp_tdev,
1352                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1353                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1354
1355         spin_lock_irqsave(&tport->tp_lock, flags);
1356         if (!status)
1357                 tport->tp_shadow_mcr = mcr;
1358         spin_unlock_irqrestore(&tport->tp_lock, flags);
1359
1360         return status;
1361 }
1362
1363
1364 static int ti_get_lsr(struct ti_port *tport)
1365 {
1366         int size, status;
1367         struct ti_device *tdev = tport->tp_tdev;
1368         struct usb_serial_port *port = tport->tp_port;
1369         int port_number = port->number - port->serial->minor;
1370         struct ti_port_status *data;
1371
1372         dbg("%s - port %d", __func__, port->number);
1373
1374         size = sizeof(struct ti_port_status);
1375         data = kmalloc(size, GFP_KERNEL);
1376         if (!data) {
1377                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1378                 return -ENOMEM;
1379         }
1380
1381         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1382                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1383         if (status) {
1384                 dev_err(&port->dev,
1385                         "%s - get port status command failed, %d\n",
1386                                                         __func__, status);
1387                 goto free_data;
1388         }
1389
1390         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1391
1392         tport->tp_lsr = data->bLSR;
1393
1394 free_data:
1395         kfree(data);
1396         return status;
1397 }
1398
1399
1400 static int ti_get_serial_info(struct ti_port *tport,
1401         struct serial_struct __user *ret_arg)
1402 {
1403         struct usb_serial_port *port = tport->tp_port;
1404         struct serial_struct ret_serial;
1405
1406         if (!ret_arg)
1407                 return -EFAULT;
1408
1409         memset(&ret_serial, 0, sizeof(ret_serial));
1410
1411         ret_serial.type = PORT_16550A;
1412         ret_serial.line = port->serial->minor;
1413         ret_serial.port = port->number - port->serial->minor;
1414         ret_serial.flags = tport->tp_flags;
1415         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1416         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1417         ret_serial.closing_wait = tport->tp_closing_wait;
1418
1419         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1420                 return -EFAULT;
1421
1422         return 0;
1423 }
1424
1425
1426 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1427         struct serial_struct __user *new_arg)
1428 {
1429         struct serial_struct new_serial;
1430
1431         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1432                 return -EFAULT;
1433
1434         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1435         tty->low_latency = (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1436         tport->tp_closing_wait = new_serial.closing_wait;
1437
1438         return 0;
1439 }
1440
1441
1442 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1443 {
1444         struct async_icount *icount;
1445         struct tty_struct *tty;
1446         unsigned long flags;
1447
1448         dbg("%s - msr 0x%02X", __func__, msr);
1449
1450         if (msr & TI_MSR_DELTA_MASK) {
1451                 spin_lock_irqsave(&tport->tp_lock, flags);
1452                 icount = &tport->tp_icount;
1453                 if (msr & TI_MSR_DELTA_CTS)
1454                         icount->cts++;
1455                 if (msr & TI_MSR_DELTA_DSR)
1456                         icount->dsr++;
1457                 if (msr & TI_MSR_DELTA_CD)
1458                         icount->dcd++;
1459                 if (msr & TI_MSR_DELTA_RI)
1460                         icount->rng++;
1461                 wake_up_interruptible(&tport->tp_msr_wait);
1462                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1463         }
1464
1465         tport->tp_msr = msr & TI_MSR_MASK;
1466
1467         /* handle CTS flow control */
1468         tty = tty_port_tty_get(&tport->tp_port->port);
1469         if (tty && C_CRTSCTS(tty)) {
1470                 if (msr & TI_MSR_CTS) {
1471                         tty->hw_stopped = 0;
1472                         tty_wakeup(tty);
1473                 } else {
1474                         tty->hw_stopped = 1;
1475                 }
1476         }
1477         tty_kref_put(tty);
1478 }
1479
1480
1481 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1482 {
1483         struct ti_device *tdev = tport->tp_tdev;
1484         struct usb_serial_port *port = tport->tp_port;
1485         wait_queue_t wait;
1486
1487         dbg("%s - port %d", __func__, port->number);
1488
1489         spin_lock_irq(&tport->tp_lock);
1490
1491         /* wait for data to drain from the buffer */
1492         tdev->td_urb_error = 0;
1493         init_waitqueue_entry(&wait, current);
1494         add_wait_queue(&tport->tp_write_wait, &wait);
1495         for (;;) {
1496                 set_current_state(TASK_INTERRUPTIBLE);
1497                 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1498                 || timeout == 0 || signal_pending(current)
1499                 || tdev->td_urb_error
1500                 || port->serial->disconnected)  /* disconnect */
1501                         break;
1502                 spin_unlock_irq(&tport->tp_lock);
1503                 timeout = schedule_timeout(timeout);
1504                 spin_lock_irq(&tport->tp_lock);
1505         }
1506         set_current_state(TASK_RUNNING);
1507         remove_wait_queue(&tport->tp_write_wait, &wait);
1508
1509         /* flush any remaining data in the buffer */
1510         if (flush)
1511                 ti_buf_clear(tport->tp_write_buf);
1512
1513         spin_unlock_irq(&tport->tp_lock);
1514
1515         mutex_lock(&port->serial->disc_mutex);
1516         /* wait for data to drain from the device */
1517         /* wait for empty tx register, plus 20 ms */
1518         timeout += jiffies;
1519         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1520         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1521         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1522         && !port->serial->disconnected) {
1523                 if (ti_get_lsr(tport))
1524                         break;
1525                 mutex_unlock(&port->serial->disc_mutex);
1526                 msleep_interruptible(20);
1527                 mutex_lock(&port->serial->disc_mutex);
1528         }
1529         mutex_unlock(&port->serial->disc_mutex);
1530 }
1531
1532
1533 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1534 {
1535         unsigned long flags;
1536
1537         spin_lock_irqsave(&tport->tp_lock, flags);
1538
1539         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1540                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1541
1542         spin_unlock_irqrestore(&tport->tp_lock, flags);
1543 }
1544
1545
1546 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1547 {
1548         struct urb *urb;
1549         int status = 0;
1550         unsigned long flags;
1551
1552         spin_lock_irqsave(&tport->tp_lock, flags);
1553
1554         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1555                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1556                 urb = tport->tp_port->read_urb;
1557                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1558                 urb->complete = ti_bulk_in_callback;
1559                 urb->context = tport;
1560                 urb->dev = tport->tp_port->serial->dev;
1561                 status = usb_submit_urb(urb, GFP_KERNEL);
1562         } else  {
1563                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1564                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1565         }
1566
1567         return status;
1568 }
1569
1570
1571 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1572         __u16 moduleid, __u16 value, __u8 *data, int size)
1573 {
1574         int status;
1575
1576         status = usb_control_msg(tdev->td_serial->dev,
1577                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1578                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1579                 value, moduleid, data, size, 1000);
1580
1581         if (status == size)
1582                 status = 0;
1583
1584         if (status > 0)
1585                 status = -ECOMM;
1586
1587         return status;
1588 }
1589
1590
1591 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1592         __u16 moduleid, __u16 value, __u8 *data, int size)
1593 {
1594         int status;
1595
1596         status = usb_control_msg(tdev->td_serial->dev,
1597                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1598                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1599                 value, moduleid, data, size, 1000);
1600
1601         if (status == size)
1602                 status = 0;
1603
1604         if (status > 0)
1605                 status = -ECOMM;
1606
1607         return status;
1608 }
1609
1610
1611 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1612         __u8 mask, __u8 byte)
1613 {
1614         int status;
1615         unsigned int size;
1616         struct ti_write_data_bytes *data;
1617         struct device *dev = &tdev->td_serial->dev->dev;
1618
1619         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1620                                         __func__, addr, mask, byte);
1621
1622         size = sizeof(struct ti_write_data_bytes) + 2;
1623         data = kmalloc(size, GFP_KERNEL);
1624         if (!data) {
1625                 dev_err(dev, "%s - out of memory\n", __func__);
1626                 return -ENOMEM;
1627         }
1628
1629         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1630         data->bDataType = TI_RW_DATA_BYTE;
1631         data->bDataCounter = 1;
1632         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1633         data->wBaseAddrLo = cpu_to_be16(addr);
1634         data->bData[0] = mask;
1635         data->bData[1] = byte;
1636
1637         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1638                 (__u8 *)data, size);
1639
1640         if (status < 0)
1641                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1642
1643         kfree(data);
1644
1645         return status;
1646 }
1647
1648 static int ti_do_download(struct usb_device *dev, int pipe,
1649                                                 u8 *buffer, int size)
1650 {
1651         int pos;
1652         u8 cs = 0;
1653         int done;
1654         struct ti_firmware_header *header;
1655         int status;
1656         int len;
1657
1658         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1659                 cs = (__u8)(cs + buffer[pos]);
1660
1661         header = (struct ti_firmware_header *)buffer;
1662         header->wLength = cpu_to_le16((__u16)(size
1663                                         - sizeof(struct ti_firmware_header)));
1664         header->bCheckSum = cs;
1665
1666         dbg("%s - downloading firmware", __func__);
1667         for (pos = 0; pos < size; pos += done) {
1668                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1669                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1670                                                                 &done, 1000);
1671                 if (status)
1672                         break;
1673         }
1674         return status;
1675 }
1676
1677 static int ti_download_firmware(struct ti_device *tdev)
1678 {
1679         int status;
1680         int buffer_size;
1681         __u8 *buffer;
1682         struct usb_device *dev = tdev->td_serial->dev;
1683         unsigned int pipe = usb_sndbulkpipe(dev,
1684                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1685         const struct firmware *fw_p;
1686         char buf[32];
1687
1688         /* try ID specific firmware first, then try generic firmware */
1689         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1690             dev->descriptor.idProduct);
1691         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1692                 if (tdev->td_is_3410)
1693                         strcpy(buf, "ti_3410.fw");
1694                 else
1695                         strcpy(buf, "ti_5052.fw");
1696                 status = request_firmware(&fw_p, buf, &dev->dev);
1697         }
1698         if (status) {
1699                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1700                 return -ENOENT;
1701         }
1702         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1703                 dev_err(&dev->dev, "%s - firmware too large\n", __func__);
1704                 return -ENOENT;
1705         }
1706
1707         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1708         buffer = kmalloc(buffer_size, GFP_KERNEL);
1709         if (buffer) {
1710                 memcpy(buffer, fw_p->data, fw_p->size);
1711                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1712                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1713                 kfree(buffer);
1714         } else {
1715                 status = -ENOMEM;
1716         }
1717         release_firmware(fw_p);
1718         if (status) {
1719                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1720                                                         __func__, status);
1721                 return status;
1722         }
1723
1724         dbg("%s - download successful", __func__);
1725
1726         return 0;
1727 }
1728
1729
1730 /* Circular Buffer Functions */
1731
1732 /*
1733  * ti_buf_alloc
1734  *
1735  * Allocate a circular buffer and all associated memory.
1736  */
1737
1738 static struct circ_buf *ti_buf_alloc(void)
1739 {
1740         struct circ_buf *cb;
1741
1742         cb = kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1743         if (cb == NULL)
1744                 return NULL;
1745
1746         cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1747         if (cb->buf == NULL) {
1748                 kfree(cb);
1749                 return NULL;
1750         }
1751
1752         ti_buf_clear(cb);
1753
1754         return cb;
1755 }
1756
1757
1758 /*
1759  * ti_buf_free
1760  *
1761  * Free the buffer and all associated memory.
1762  */
1763
1764 static void ti_buf_free(struct circ_buf *cb)
1765 {
1766         kfree(cb->buf);
1767         kfree(cb);
1768 }
1769
1770
1771 /*
1772  * ti_buf_clear
1773  *
1774  * Clear out all data in the circular buffer.
1775  */
1776
1777 static void ti_buf_clear(struct circ_buf *cb)
1778 {
1779         cb->head = cb->tail = 0;
1780 }
1781
1782
1783 /*
1784  * ti_buf_data_avail
1785  *
1786  * Return the number of bytes of data available in the circular
1787  * buffer.
1788  */
1789
1790 static int ti_buf_data_avail(struct circ_buf *cb)
1791 {
1792         return CIRC_CNT(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1793 }
1794
1795
1796 /*
1797  * ti_buf_space_avail
1798  *
1799  * Return the number of bytes of space available in the circular
1800  * buffer.
1801  */
1802
1803 static int ti_buf_space_avail(struct circ_buf *cb)
1804 {
1805         return CIRC_SPACE(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1806 }
1807
1808
1809 /*
1810  * ti_buf_put
1811  *
1812  * Copy data data from a user buffer and put it into the circular buffer.
1813  * Restrict to the amount of space available.
1814  *
1815  * Return the number of bytes copied.
1816  */
1817
1818 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1819 {
1820         int c, ret = 0;
1821
1822         while (1) {
1823                 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1824                 if (count < c)
1825                         c = count;
1826                 if (c <= 0)
1827                         break;
1828                 memcpy(cb->buf + cb->head, buf, c);
1829                 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1830                 buf += c;
1831                 count -= c;
1832                 ret += c;
1833         }
1834
1835         return ret;
1836 }
1837
1838
1839 /*
1840  * ti_buf_get
1841  *
1842  * Get data from the circular buffer and copy to the given buffer.
1843  * Restrict to the amount of data available.
1844  *
1845  * Return the number of bytes copied.
1846  */
1847
1848 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1849 {
1850         int c, ret = 0;
1851
1852         while (1) {
1853                 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1854                 if (count < c)
1855                         c = count;
1856                 if (c <= 0)
1857                         break;
1858                 memcpy(buf, cb->buf + cb->tail, c);
1859                 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1860                 buf += c;
1861                 count -= c;
1862                 ret += c;
1863         }
1864
1865         return ret;
1866 }