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/kfifo.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       "v0.10"
  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_CLOSING_WAIT 4000            /* in .01 secs */
  54
  55 /* supported setserial flags */
  56 #define TI_SET_SERIAL_FLAGS     0
  57
  58 /* read urb states */
  59 #define TI_READ_URB_RUNNING     0
  60 #define TI_READ_URB_STOPPING    1
  61 #define TI_READ_URB_STOPPED     2
  62
  63 #define TI_EXTRA_VID_PID_COUNT  5
  64
  65
  66 /* Structures */
  67
  68 struct ti_port {
  69         int                     tp_is_open;
  70         __u8                    tp_msr;
  71         __u8                    tp_lsr;
  72         __u8                    tp_shadow_mcr;
  73         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  74         unsigned int            tp_uart_base_addr;
  75         int                     tp_flags;
  76         int                     tp_closing_wait;/* in .01 secs */
  77         struct async_icount     tp_icount;
  78         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
  79         wait_queue_head_t       tp_write_wait;
  80         struct ti_device        *tp_tdev;
  81         struct usb_serial_port  *tp_port;
  82         spinlock_t              tp_lock;
  83         int                     tp_read_urb_state;
  84         int                     tp_write_urb_in_use;
  85         struct kfifo            write_fifo;
  86 };
  87
  88 struct ti_device {
  89         struct mutex            td_open_close_lock;
  90         int                     td_open_port_count;
  91         struct usb_serial       *td_serial;
  92         int                     td_is_3410;
  93         int                     td_urb_error;
  94 };
  95
  96
  97 /* Function Declarations */
  98
  99 static int ti_startup(struct usb_serial *serial);
 100 static void ti_release(struct usb_serial *serial);
 101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 102 static void ti_close(struct usb_serial_port *port);
 103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 104                 const unsigned char *data, int count);
 105 static int ti_write_room(struct tty_struct *tty);
 106 static int ti_chars_in_buffer(struct tty_struct *tty);
 107 static void ti_throttle(struct tty_struct *tty);
 108 static void ti_unthrottle(struct tty_struct *tty);
 109 static int ti_ioctl(struct tty_struct *tty,
 110                 unsigned int cmd, unsigned long arg);
 111 static int ti_get_icount(struct tty_struct *tty,
 112                 struct serial_icounter_struct *icount);
 113 static void ti_set_termios(struct tty_struct *tty,
 114                 struct usb_serial_port *port, struct ktermios *old_termios);
 115 static int ti_tiocmget(struct tty_struct *tty);
 116 static int ti_tiocmset(struct tty_struct *tty,
 117                 unsigned int set, unsigned int clear);
 118 static void ti_break(struct tty_struct *tty, int break_state);
 119 static void ti_interrupt_callback(struct urb *urb);
 120 static void ti_bulk_in_callback(struct urb *urb);
 121 static void ti_bulk_out_callback(struct urb *urb);
 122
 123 static void ti_recv(struct device *dev, struct tty_struct *tty,
 124         unsigned char *data, int length);
 125 static void ti_send(struct ti_port *tport);
 126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 127 static int ti_get_lsr(struct ti_port *tport);
 128 static int ti_get_serial_info(struct ti_port *tport,
 129         struct serial_struct __user *ret_arg);
 130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 131         struct serial_struct __user *new_arg);
 132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 133
 134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 135
 136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 138
 139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 140         __u16 moduleid, __u16 value, __u8 *data, int size);
 141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 142         __u16 moduleid, __u16 value, __u8 *data, int size);
 143
 144 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 145         __u8 mask, __u8 byte);
 146
 147 static int ti_download_firmware(struct ti_device *tdev);
 148
 149
 150 /* Data */
 151
 152 /* module parameters */
 153 static bool debug;
 154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 156 static unsigned int vendor_3410_count;
 157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 158 static unsigned int product_3410_count;
 159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 160 static unsigned int vendor_5052_count;
 161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 162 static unsigned int product_5052_count;
 163
 164 /* supported devices */
 165 /* the array dimension is the number of default entries plus */
 166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 167 /* null entry */
 168 static struct usb_device_id ti_id_table_3410[14+TI_EXTRA_VID_PID_COUNT+1] = {
 169         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 170         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 172         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 173         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 174         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 175         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 178         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 179         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 180         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 181         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 182         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 183 };
 184
 185 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 190 };
 191
 192 static struct usb_device_id ti_id_table_combined[18+2*TI_EXTRA_VID_PID_COUNT+1] = {
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 203         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 207         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 210         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 211         { }
 212 };
 213
 214 static struct usb_driver ti_usb_driver = {
 215         .name                   = "ti_usb_3410_5052",
 216         .probe                  = usb_serial_probe,
 217         .disconnect             = usb_serial_disconnect,
 218         .id_table               = ti_id_table_combined,
 219 };
 220
 221 static struct usb_serial_driver ti_1port_device = {
 222         .driver = {
 223                 .owner          = THIS_MODULE,
 224                 .name           = "ti_usb_3410_5052_1",
 225         },
 226         .description            = "TI USB 3410 1 port adapter",
 227         .id_table               = ti_id_table_3410,
 228         .num_ports              = 1,
 229         .attach                 = ti_startup,
 230         .release                = ti_release,
 231         .open                   = ti_open,
 232         .close                  = ti_close,
 233         .write                  = ti_write,
 234         .write_room             = ti_write_room,
 235         .chars_in_buffer        = ti_chars_in_buffer,
 236         .throttle               = ti_throttle,
 237         .unthrottle             = ti_unthrottle,
 238         .ioctl                  = ti_ioctl,
 239         .set_termios            = ti_set_termios,
 240         .tiocmget               = ti_tiocmget,
 241         .tiocmset               = ti_tiocmset,
 242         .get_icount             = ti_get_icount,
 243         .break_ctl              = ti_break,
 244         .read_int_callback      = ti_interrupt_callback,
 245         .read_bulk_callback     = ti_bulk_in_callback,
 246         .write_bulk_callback    = ti_bulk_out_callback,
 247 };
 248
 249 static struct usb_serial_driver ti_2port_device = {
 250         .driver = {
 251                 .owner          = THIS_MODULE,
 252                 .name           = "ti_usb_3410_5052_2",
 253         },
 254         .description            = "TI USB 5052 2 port adapter",
 255         .id_table               = ti_id_table_5052,
 256         .num_ports              = 2,
 257         .attach                 = ti_startup,
 258         .release                = ti_release,
 259         .open                   = ti_open,
 260         .close                  = ti_close,
 261         .write                  = ti_write,
 262         .write_room             = ti_write_room,
 263         .chars_in_buffer        = ti_chars_in_buffer,
 264         .throttle               = ti_throttle,
 265         .unthrottle             = ti_unthrottle,
 266         .ioctl                  = ti_ioctl,
 267         .set_termios            = ti_set_termios,
 268         .tiocmget               = ti_tiocmget,
 269         .tiocmset               = ti_tiocmset,
 270         .get_icount             = ti_get_icount,
 271         .break_ctl              = ti_break,
 272         .read_int_callback      = ti_interrupt_callback,
 273         .read_bulk_callback     = ti_bulk_in_callback,
 274         .write_bulk_callback    = ti_bulk_out_callback,
 275 };
 276
 277 static struct usb_serial_driver * const serial_drivers[] = {
 278         &ti_1port_device, &ti_2port_device, NULL
 279 };
 280
 281 /* Module */
 282
 283 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 284 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 285 MODULE_VERSION(TI_DRIVER_VERSION);
 286 MODULE_LICENSE("GPL");
 287
 288 MODULE_FIRMWARE("ti_3410.fw");
 289 MODULE_FIRMWARE("ti_5052.fw");
 290 MODULE_FIRMWARE("mts_cdma.fw");
 291 MODULE_FIRMWARE("mts_gsm.fw");
 292 MODULE_FIRMWARE("mts_edge.fw");
 293 MODULE_FIRMWARE("mts_mt9234mu.fw");
 294 MODULE_FIRMWARE("mts_mt9234zba.fw");
 295
 296 module_param(debug, bool, S_IRUGO | S_IWUSR);
 297 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 298
 299 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 300 MODULE_PARM_DESC(closing_wait,
 301     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 302
 303 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 304 MODULE_PARM_DESC(vendor_3410,
 305                 "Vendor ids for 3410 based devices, 1-5 short integers");
 306 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 307 MODULE_PARM_DESC(product_3410,
 308                 "Product ids for 3410 based devices, 1-5 short integers");
 309 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 310 MODULE_PARM_DESC(vendor_5052,
 311                 "Vendor ids for 5052 based devices, 1-5 short integers");
 312 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 313 MODULE_PARM_DESC(product_5052,
 314                 "Product ids for 5052 based devices, 1-5 short integers");
 315
 316 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 317
 318
 319 /* Functions */
 320
 321 static int __init ti_init(void)
 322 {
 323         int i, j, c;
 324         int ret;
 325
 326         /* insert extra vendor and product ids */
 327         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 328         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 329         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 330                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 331                 ti_id_table_3410[j].idProduct = product_3410[i];
 332                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 333                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 334                 ti_id_table_combined[c].idProduct = product_3410[i];
 335                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 336         }
 337         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 338         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 339                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 340                 ti_id_table_5052[j].idProduct = product_5052[i];
 341                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 342                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 343                 ti_id_table_combined[c].idProduct = product_5052[i];
 344                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 345         }
 346
 347         ret = usb_serial_register_drivers(&ti_usb_driver, serial_drivers);
 348         if (ret == 0)
 349                 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 350                                TI_DRIVER_DESC "\n");
 351         return ret;
 352 }
 353
 354
 355 static void __exit ti_exit(void)
 356 {
 357         usb_serial_deregister_drivers(&ti_usb_driver, serial_drivers);
 358 }
 359
 360
 361 module_init(ti_init);
 362 module_exit(ti_exit);
 363
 364
 365 static int ti_startup(struct usb_serial *serial)
 366 {
 367         struct ti_device *tdev;
 368         struct ti_port *tport;
 369         struct usb_device *dev = serial->dev;
 370         int status;
 371         int i;
 372
 373
 374         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 375             __func__, le16_to_cpu(dev->descriptor.idProduct),
 376             dev->descriptor.bNumConfigurations,
 377             dev->actconfig->desc.bConfigurationValue);
 378
 379         /* create device structure */
 380         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 381         if (tdev == NULL) {
 382                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 383                 return -ENOMEM;
 384         }
 385         mutex_init(&tdev->td_open_close_lock);
 386         tdev->td_serial = serial;
 387         usb_set_serial_data(serial, tdev);
 388
 389         /* determine device type */
 390         if (usb_match_id(serial->interface, ti_id_table_3410))
 391                 tdev->td_is_3410 = 1;
 392         dbg("%s - device type is %s", __func__,
 393                                 tdev->td_is_3410 ? "3410" : "5052");
 394
 395         /* if we have only 1 configuration, download firmware */
 396         if (dev->descriptor.bNumConfigurations == 1) {
 397                 status = ti_download_firmware(tdev);
 398
 399                 if (status != 0)
 400                         goto free_tdev;
 401
 402                 /* 3410 must be reset, 5052 resets itself */
 403                 if (tdev->td_is_3410) {
 404                         msleep_interruptible(100);
 405                         usb_reset_device(dev);
 406                 }
 407
 408                 status = -ENODEV;
 409                 goto free_tdev;
 410         }
 411
 412         /* the second configuration must be set */
 413         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 414                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 415                 status = status ? status : -ENODEV;
 416                 goto free_tdev;
 417         }
 418
 419         /* set up port structures */
 420         for (i = 0; i < serial->num_ports; ++i) {
 421                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 422                 if (tport == NULL) {
 423                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 424                         status = -ENOMEM;
 425                         goto free_tports;
 426                 }
 427                 spin_lock_init(&tport->tp_lock);
 428                 tport->tp_uart_base_addr = (i == 0 ?
 429                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 430                 tport->tp_closing_wait = closing_wait;
 431                 init_waitqueue_head(&tport->tp_msr_wait);
 432                 init_waitqueue_head(&tport->tp_write_wait);
 433                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 434                                                                 GFP_KERNEL)) {
 435                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 436                         kfree(tport);
 437                         status = -ENOMEM;
 438                         goto free_tports;
 439                 }
 440                 tport->tp_port = serial->port[i];
 441                 tport->tp_tdev = tdev;
 442                 usb_set_serial_port_data(serial->port[i], tport);
 443                 tport->tp_uart_mode = 0;        /* default is RS232 */
 444         }
 445
 446         return 0;
 447
 448 free_tports:
 449         for (--i; i >= 0; --i) {
 450                 tport = usb_get_serial_port_data(serial->port[i]);
 451                 kfifo_free(&tport->write_fifo);
 452                 kfree(tport);
 453                 usb_set_serial_port_data(serial->port[i], NULL);
 454         }
 455 free_tdev:
 456         kfree(tdev);
 457         usb_set_serial_data(serial, NULL);
 458         return status;
 459 }
 460
 461
 462 static void ti_release(struct usb_serial *serial)
 463 {
 464         int i;
 465         struct ti_device *tdev = usb_get_serial_data(serial);
 466         struct ti_port *tport;
 467
 468         for (i = 0; i < serial->num_ports; ++i) {
 469                 tport = usb_get_serial_port_data(serial->port[i]);
 470                 if (tport) {
 471                         kfifo_free(&tport->write_fifo);
 472                         kfree(tport);
 473                 }
 474         }
 475
 476         kfree(tdev);
 477 }
 478
 479
 480 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 481 {
 482         struct ti_port *tport = usb_get_serial_port_data(port);
 483         struct ti_device *tdev;
 484         struct usb_device *dev;
 485         struct urb *urb;
 486         int port_number;
 487         int status;
 488         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 489                              TI_PIPE_TIMEOUT_ENABLE |
 490                              (TI_TRANSFER_TIMEOUT << 2));
 491
 492         if (tport == NULL)
 493                 return -ENODEV;
 494
 495         dev = port->serial->dev;
 496         tdev = tport->tp_tdev;
 497
 498         /* only one open on any port on a device at a time */
 499         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 500                 return -ERESTARTSYS;
 501
 502         port_number = port->number - port->serial->minor;
 503
 504         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 505
 506         tport->tp_msr = 0;
 507         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 508
 509         /* start interrupt urb the first time a port is opened on this device */
 510         if (tdev->td_open_port_count == 0) {
 511                 dbg("%s - start interrupt in urb", __func__);
 512                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 513                 if (!urb) {
 514                         dev_err(&port->dev, "%s - no interrupt urb\n",
 515                                                                 __func__);
 516                         status = -EINVAL;
 517                         goto release_lock;
 518                 }
 519                 urb->context = tdev;
 520                 status = usb_submit_urb(urb, GFP_KERNEL);
 521                 if (status) {
 522                         dev_err(&port->dev,
 523                                 "%s - submit interrupt urb failed, %d\n",
 524                                         __func__, status);
 525                         goto release_lock;
 526                 }
 527         }
 528
 529         if (tty)
 530                 ti_set_termios(tty, port, tty->termios);
 531
 532         dbg("%s - sending TI_OPEN_PORT", __func__);
 533         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 534                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 535         if (status) {
 536                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 537                                                         __func__, status);
 538                 goto unlink_int_urb;
 539         }
 540
 541         dbg("%s - sending TI_START_PORT", __func__);
 542         status = ti_command_out_sync(tdev, TI_START_PORT,
 543                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 544         if (status) {
 545                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 546                                                         __func__, status);
 547                 goto unlink_int_urb;
 548         }
 549
 550         dbg("%s - sending TI_PURGE_PORT", __func__);
 551         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 552                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 553         if (status) {
 554                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 555                                                         __func__, status);
 556                 goto unlink_int_urb;
 557         }
 558         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 559                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 560         if (status) {
 561                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 562                                                         __func__, status);
 563                 goto unlink_int_urb;
 564         }
 565
 566         /* reset the data toggle on the bulk endpoints to work around bug in
 567          * host controllers where things get out of sync some times */
 568         usb_clear_halt(dev, port->write_urb->pipe);
 569         usb_clear_halt(dev, port->read_urb->pipe);
 570
 571         if (tty)
 572                 ti_set_termios(tty, port, tty->termios);
 573
 574         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 575         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 576                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 577         if (status) {
 578                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 579                                                         __func__, status);
 580                 goto unlink_int_urb;
 581         }
 582
 583         dbg("%s - sending TI_START_PORT (2)", __func__);
 584         status = ti_command_out_sync(tdev, TI_START_PORT,
 585                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 586         if (status) {
 587                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 588                                                         __func__, status);
 589                 goto unlink_int_urb;
 590         }
 591
 592         /* start read urb */
 593         dbg("%s - start read urb", __func__);
 594         urb = port->read_urb;
 595         if (!urb) {
 596                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 597                 status = -EINVAL;
 598                 goto unlink_int_urb;
 599         }
 600         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 601         urb->context = tport;
 602         status = usb_submit_urb(urb, GFP_KERNEL);
 603         if (status) {
 604                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 605                                                         __func__, status);
 606                 goto unlink_int_urb;
 607         }
 608
 609         tport->tp_is_open = 1;
 610         ++tdev->td_open_port_count;
 611
 612         goto release_lock;
 613
 614 unlink_int_urb:
 615         if (tdev->td_open_port_count == 0)
 616                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 617 release_lock:
 618         mutex_unlock(&tdev->td_open_close_lock);
 619         dbg("%s - exit %d", __func__, status);
 620         return status;
 621 }
 622
 623
 624 static void ti_close(struct usb_serial_port *port)
 625 {
 626         struct ti_device *tdev;
 627         struct ti_port *tport;
 628         int port_number;
 629         int status;
 630         int do_unlock;
 631
 632         tdev = usb_get_serial_data(port->serial);
 633         tport = usb_get_serial_port_data(port);
 634         if (tdev == NULL || tport == NULL)
 635                 return;
 636
 637         tport->tp_is_open = 0;
 638
 639         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 640
 641         usb_kill_urb(port->read_urb);
 642         usb_kill_urb(port->write_urb);
 643         tport->tp_write_urb_in_use = 0;
 644
 645         port_number = port->number - port->serial->minor;
 646
 647         dbg("%s - sending TI_CLOSE_PORT", __func__);
 648         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 649                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 650         if (status)
 651                 dev_err(&port->dev,
 652                         "%s - cannot send close port command, %d\n"
 653                                                         , __func__, status);
 654
 655         /* if mutex_lock is interrupted, continue anyway */
 656         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 657         --tport->tp_tdev->td_open_port_count;
 658         if (tport->tp_tdev->td_open_port_count <= 0) {
 659                 /* last port is closed, shut down interrupt urb */
 660                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 661                 tport->tp_tdev->td_open_port_count = 0;
 662         }
 663         if (do_unlock)
 664                 mutex_unlock(&tdev->td_open_close_lock);
 665 }
 666
 667
 668 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 669                         const unsigned char *data, int count)
 670 {
 671         struct ti_port *tport = usb_get_serial_port_data(port);
 672
 673         if (count == 0) {
 674                 dbg("%s - write request of 0 bytes", __func__);
 675                 return 0;
 676         }
 677
 678         if (tport == NULL || !tport->tp_is_open)
 679                 return -ENODEV;
 680
 681         count = kfifo_in_locked(&tport->write_fifo, data, count,
 682                                                         &tport->tp_lock);
 683         ti_send(tport);
 684
 685         return count;
 686 }
 687
 688
 689 static int ti_write_room(struct tty_struct *tty)
 690 {
 691         struct usb_serial_port *port = tty->driver_data;
 692         struct ti_port *tport = usb_get_serial_port_data(port);
 693         int room = 0;
 694         unsigned long flags;
 695
 696         if (tport == NULL)
 697                 return 0;
 698
 699         spin_lock_irqsave(&tport->tp_lock, flags);
 700         room = kfifo_avail(&tport->write_fifo);
 701         spin_unlock_irqrestore(&tport->tp_lock, flags);
 702
 703         dbg("%s - returns %d", __func__, room);
 704         return room;
 705 }
 706
 707
 708 static int ti_chars_in_buffer(struct tty_struct *tty)
 709 {
 710         struct usb_serial_port *port = tty->driver_data;
 711         struct ti_port *tport = usb_get_serial_port_data(port);
 712         int chars = 0;
 713         unsigned long flags;
 714
 715         if (tport == NULL)
 716                 return 0;
 717
 718         spin_lock_irqsave(&tport->tp_lock, flags);
 719         chars = kfifo_len(&tport->write_fifo);
 720         spin_unlock_irqrestore(&tport->tp_lock, flags);
 721
 722         dbg("%s - returns %d", __func__, chars);
 723         return chars;
 724 }
 725
 726
 727 static void ti_throttle(struct tty_struct *tty)
 728 {
 729         struct usb_serial_port *port = tty->driver_data;
 730         struct ti_port *tport = usb_get_serial_port_data(port);
 731
 732         if (tport == NULL)
 733                 return;
 734
 735         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 736                 ti_stop_read(tport, tty);
 737
 738 }
 739
 740
 741 static void ti_unthrottle(struct tty_struct *tty)
 742 {
 743         struct usb_serial_port *port = tty->driver_data;
 744         struct ti_port *tport = usb_get_serial_port_data(port);
 745         int status;
 746
 747         if (tport == NULL)
 748                 return;
 749
 750         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 751                 status = ti_restart_read(tport, tty);
 752                 if (status)
 753                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 754                                                         __func__, status);
 755         }
 756 }
 757
 758 static int ti_get_icount(struct tty_struct *tty,
 759                 struct serial_icounter_struct *icount)
 760 {
 761         struct usb_serial_port *port = tty->driver_data;
 762         struct ti_port *tport = usb_get_serial_port_data(port);
 763         struct async_icount cnow = tport->tp_icount;
 764
 765         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 766                 __func__, port->number,
 767                 cnow.rx, cnow.tx);
 768
 769         icount->cts = cnow.cts;
 770         icount->dsr = cnow.dsr;
 771         icount->rng = cnow.rng;
 772         icount->dcd = cnow.dcd;
 773         icount->rx = cnow.rx;
 774         icount->tx = cnow.tx;
 775         icount->frame = cnow.frame;
 776         icount->overrun = cnow.overrun;
 777         icount->parity = cnow.parity;
 778         icount->brk = cnow.brk;
 779         icount->buf_overrun = cnow.buf_overrun;
 780
 781         return 0;
 782 }
 783
 784 static int ti_ioctl(struct tty_struct *tty,
 785         unsigned int cmd, unsigned long arg)
 786 {
 787         struct usb_serial_port *port = tty->driver_data;
 788         struct ti_port *tport = usb_get_serial_port_data(port);
 789         struct async_icount cnow;
 790         struct async_icount cprev;
 791
 792         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 793
 794         if (tport == NULL)
 795                 return -ENODEV;
 796
 797         switch (cmd) {
 798         case TIOCGSERIAL:
 799                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 800                 return ti_get_serial_info(tport,
 801                                 (struct serial_struct __user *)arg);
 802         case TIOCSSERIAL:
 803                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 804                 return ti_set_serial_info(tty, tport,
 805                                 (struct serial_struct __user *)arg);
 806         case TIOCMIWAIT:
 807                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 808                 cprev = tport->tp_icount;
 809                 while (1) {
 810                         interruptible_sleep_on(&tport->tp_msr_wait);
 811                         if (signal_pending(current))
 812                                 return -ERESTARTSYS;
 813                         cnow = tport->tp_icount;
 814                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 815                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 816                                 return -EIO; /* no change => error */
 817                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 818                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 819                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 820                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 821                                 return 0;
 822                         cprev = cnow;
 823                 }
 824                 break;
 825         }
 826         return -ENOIOCTLCMD;
 827 }
 828
 829
 830 static void ti_set_termios(struct tty_struct *tty,
 831                 struct usb_serial_port *port, struct ktermios *old_termios)
 832 {
 833         struct ti_port *tport = usb_get_serial_port_data(port);
 834         struct ti_uart_config *config;
 835         tcflag_t cflag, iflag;
 836         int baud;
 837         int status;
 838         int port_number = port->number - port->serial->minor;
 839         unsigned int mcr;
 840
 841         cflag = tty->termios->c_cflag;
 842         iflag = tty->termios->c_iflag;
 843
 844         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 845         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 846                                 old_termios->c_cflag, old_termios->c_iflag);
 847
 848         if (tport == NULL)
 849                 return;
 850
 851         config = kmalloc(sizeof(*config), GFP_KERNEL);
 852         if (!config) {
 853                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 854                 return;
 855         }
 856
 857         config->wFlags = 0;
 858
 859         /* these flags must be set */
 860         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 861         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 862         config->bUartMode = (__u8)(tport->tp_uart_mode);
 863
 864         switch (cflag & CSIZE) {
 865         case CS5:
 866                     config->bDataBits = TI_UART_5_DATA_BITS;
 867                     break;
 868         case CS6:
 869                     config->bDataBits = TI_UART_6_DATA_BITS;
 870                     break;
 871         case CS7:
 872                     config->bDataBits = TI_UART_7_DATA_BITS;
 873                     break;
 874         default:
 875         case CS8:
 876                     config->bDataBits = TI_UART_8_DATA_BITS;
 877                     break;
 878         }
 879
 880         /* CMSPAR isn't supported by this driver */
 881         tty->termios->c_cflag &= ~CMSPAR;
 882
 883         if (cflag & PARENB) {
 884                 if (cflag & PARODD) {
 885                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 886                         config->bParity = TI_UART_ODD_PARITY;
 887                 } else {
 888                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 889                         config->bParity = TI_UART_EVEN_PARITY;
 890                 }
 891         } else {
 892                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 893                 config->bParity = TI_UART_NO_PARITY;
 894         }
 895
 896         if (cflag & CSTOPB)
 897                 config->bStopBits = TI_UART_2_STOP_BITS;
 898         else
 899                 config->bStopBits = TI_UART_1_STOP_BITS;
 900
 901         if (cflag & CRTSCTS) {
 902                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 903                 if ((cflag & CBAUD) != B0)
 904                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 905                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 906         } else {
 907                 tty->hw_stopped = 0;
 908                 ti_restart_read(tport, tty);
 909         }
 910
 911         if (I_IXOFF(tty) || I_IXON(tty)) {
 912                 config->cXon  = START_CHAR(tty);
 913                 config->cXoff = STOP_CHAR(tty);
 914
 915                 if (I_IXOFF(tty))
 916                         config->wFlags |= TI_UART_ENABLE_X_IN;
 917                 else
 918                         ti_restart_read(tport, tty);
 919
 920                 if (I_IXON(tty))
 921                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 922         }
 923
 924         baud = tty_get_baud_rate(tty);
 925         if (!baud)
 926                 baud = 9600;
 927         if (tport->tp_tdev->td_is_3410)
 928                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 929         else
 930                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 931
 932         /* FIXME: Should calculate resulting baud here and report it back */
 933         if ((cflag & CBAUD) != B0)
 934                 tty_encode_baud_rate(tty, baud, baud);
 935
 936         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 937         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 938
 939         cpu_to_be16s(&config->wBaudRate);
 940         cpu_to_be16s(&config->wFlags);
 941
 942         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 943                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 944                 sizeof(*config));
 945         if (status)
 946                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 947                                         __func__, port_number, status);
 948
 949         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 950         mcr = tport->tp_shadow_mcr;
 951         /* if baud rate is B0, clear RTS and DTR */
 952         if ((cflag & CBAUD) == B0)
 953                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 954         status = ti_set_mcr(tport, mcr);
 955         if (status)
 956                 dev_err(&port->dev,
 957                         "%s - cannot set modem control on port %d, %d\n",
 958                                                 __func__, port_number, status);
 959
 960         kfree(config);
 961 }
 962
 963
 964 static int ti_tiocmget(struct tty_struct *tty)
 965 {
 966         struct usb_serial_port *port = tty->driver_data;
 967         struct ti_port *tport = usb_get_serial_port_data(port);
 968         unsigned int result;
 969         unsigned int msr;
 970         unsigned int mcr;
 971         unsigned long flags;
 972
 973         if (tport == NULL)
 974                 return -ENODEV;
 975
 976         spin_lock_irqsave(&tport->tp_lock, flags);
 977         msr = tport->tp_msr;
 978         mcr = tport->tp_shadow_mcr;
 979         spin_unlock_irqrestore(&tport->tp_lock, flags);
 980
 981         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 982                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 983                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 984                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 985                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 986                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 987                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 988
 989         dbg("%s - 0x%04X", __func__, result);
 990
 991         return result;
 992 }
 993
 994
 995 static int ti_tiocmset(struct tty_struct *tty,
 996                                 unsigned int set, unsigned int clear)
 997 {
 998         struct usb_serial_port *port = tty->driver_data;
 999         struct ti_port *tport = usb_get_serial_port_data(port);
1000         unsigned int mcr;
1001         unsigned long flags;
1002
1003         if (tport == NULL)
1004                 return -ENODEV;
1005
1006         spin_lock_irqsave(&tport->tp_lock, flags);
1007         mcr = tport->tp_shadow_mcr;
1008
1009         if (set & TIOCM_RTS)
1010                 mcr |= TI_MCR_RTS;
1011         if (set & TIOCM_DTR)
1012                 mcr |= TI_MCR_DTR;
1013         if (set & TIOCM_LOOP)
1014                 mcr |= TI_MCR_LOOP;
1015
1016         if (clear & TIOCM_RTS)
1017                 mcr &= ~TI_MCR_RTS;
1018         if (clear & TIOCM_DTR)
1019                 mcr &= ~TI_MCR_DTR;
1020         if (clear & TIOCM_LOOP)
1021                 mcr &= ~TI_MCR_LOOP;
1022         spin_unlock_irqrestore(&tport->tp_lock, flags);
1023
1024         return ti_set_mcr(tport, mcr);
1025 }
1026
1027
1028 static void ti_break(struct tty_struct *tty, int break_state)
1029 {
1030         struct usb_serial_port *port = tty->driver_data;
1031         struct ti_port *tport = usb_get_serial_port_data(port);
1032         int status;
1033
1034         dbg("%s - state = %d", __func__, break_state);
1035
1036         if (tport == NULL)
1037                 return;
1038
1039         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1040
1041         status = ti_write_byte(tport->tp_tdev,
1042                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1043                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1044
1045         if (status)
1046                 dbg("%s - error setting break, %d", __func__, status);
1047 }
1048
1049
1050 static void ti_interrupt_callback(struct urb *urb)
1051 {
1052         struct ti_device *tdev = urb->context;
1053         struct usb_serial_port *port;
1054         struct usb_serial *serial = tdev->td_serial;
1055         struct ti_port *tport;
1056         struct device *dev = &urb->dev->dev;
1057         unsigned char *data = urb->transfer_buffer;
1058         int length = urb->actual_length;
1059         int port_number;
1060         int function;
1061         int status = urb->status;
1062         int retval;
1063         __u8 msr;
1064
1065         switch (status) {
1066         case 0:
1067                 break;
1068         case -ECONNRESET:
1069         case -ENOENT:
1070         case -ESHUTDOWN:
1071                 dbg("%s - urb shutting down, %d", __func__, status);
1072                 tdev->td_urb_error = 1;
1073                 return;
1074         default:
1075                 dev_err(dev, "%s - nonzero urb status, %d\n",
1076                         __func__, status);
1077                 tdev->td_urb_error = 1;
1078                 goto exit;
1079         }
1080
1081         if (length != 2) {
1082                 dbg("%s - bad packet size, %d", __func__, length);
1083                 goto exit;
1084         }
1085
1086         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1087                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1088                 goto exit;
1089         }
1090
1091         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1092         function = TI_GET_FUNC_FROM_CODE(data[0]);
1093
1094         dbg("%s - port_number %d, function %d, data 0x%02X",
1095                                 __func__, port_number, function, data[1]);
1096
1097         if (port_number >= serial->num_ports) {
1098                 dev_err(dev, "%s - bad port number, %d\n",
1099                                                 __func__, port_number);
1100                 goto exit;
1101         }
1102
1103         port = serial->port[port_number];
1104
1105         tport = usb_get_serial_port_data(port);
1106         if (!tport)
1107                 goto exit;
1108
1109         switch (function) {
1110         case TI_CODE_DATA_ERROR:
1111                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1112                                         __func__, port_number, data[1]);
1113                 break;
1114
1115         case TI_CODE_MODEM_STATUS:
1116                 msr = data[1];
1117                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1118                 ti_handle_new_msr(tport, msr);
1119                 break;
1120
1121         default:
1122                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1123                                                         __func__, data[1]);
1124                 break;
1125         }
1126
1127 exit:
1128         retval = usb_submit_urb(urb, GFP_ATOMIC);
1129         if (retval)
1130                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1131                         __func__, retval);
1132 }
1133
1134
1135 static void ti_bulk_in_callback(struct urb *urb)
1136 {
1137         struct ti_port *tport = urb->context;
1138         struct usb_serial_port *port = tport->tp_port;
1139         struct device *dev = &urb->dev->dev;
1140         int status = urb->status;
1141         int retval = 0;
1142         struct tty_struct *tty;
1143
1144         switch (status) {
1145         case 0:
1146                 break;
1147         case -ECONNRESET:
1148         case -ENOENT:
1149         case -ESHUTDOWN:
1150                 dbg("%s - urb shutting down, %d", __func__, status);
1151                 tport->tp_tdev->td_urb_error = 1;
1152                 wake_up_interruptible(&tport->tp_write_wait);
1153                 return;
1154         default:
1155                 dev_err(dev, "%s - nonzero urb status, %d\n",
1156                         __func__, status);
1157                 tport->tp_tdev->td_urb_error = 1;
1158                 wake_up_interruptible(&tport->tp_write_wait);
1159         }
1160
1161         if (status == -EPIPE)
1162                 goto exit;
1163
1164         if (status) {
1165                 dev_err(dev, "%s - stopping read!\n", __func__);
1166                 return;
1167         }
1168
1169         tty = tty_port_tty_get(&port->port);
1170         if (tty) {
1171                 if (urb->actual_length) {
1172                         usb_serial_debug_data(debug, dev, __func__,
1173                                 urb->actual_length, urb->transfer_buffer);
1174
1175                         if (!tport->tp_is_open)
1176                                 dbg("%s - port closed, dropping data",
1177                                         __func__);
1178                         else
1179                                 ti_recv(&urb->dev->dev, tty,
1180                                                 urb->transfer_buffer,
1181                                                 urb->actual_length);
1182                         spin_lock(&tport->tp_lock);
1183                         tport->tp_icount.rx += urb->actual_length;
1184                         spin_unlock(&tport->tp_lock);
1185                 }
1186                 tty_kref_put(tty);
1187         }
1188
1189 exit:
1190         /* continue to read unless stopping */
1191         spin_lock(&tport->tp_lock);
1192         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1193                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1194         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1195                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1196
1197         spin_unlock(&tport->tp_lock);
1198         if (retval)
1199                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1200                         __func__, retval);
1201 }
1202
1203
1204 static void ti_bulk_out_callback(struct urb *urb)
1205 {
1206         struct ti_port *tport = urb->context;
1207         struct usb_serial_port *port = tport->tp_port;
1208         int status = urb->status;
1209
1210         tport->tp_write_urb_in_use = 0;
1211
1212         switch (status) {
1213         case 0:
1214                 break;
1215         case -ECONNRESET:
1216         case -ENOENT:
1217         case -ESHUTDOWN:
1218                 dbg("%s - urb shutting down, %d", __func__, status);
1219                 tport->tp_tdev->td_urb_error = 1;
1220                 wake_up_interruptible(&tport->tp_write_wait);
1221                 return;
1222         default:
1223                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1224                         __func__, status);
1225                 tport->tp_tdev->td_urb_error = 1;
1226                 wake_up_interruptible(&tport->tp_write_wait);
1227         }
1228
1229         /* send any buffered data */
1230         ti_send(tport);
1231 }
1232
1233
1234 static void ti_recv(struct device *dev, struct tty_struct *tty,
1235         unsigned char *data, int length)
1236 {
1237         int cnt;
1238
1239         do {
1240                 cnt = tty_insert_flip_string(tty, data, length);
1241                 if (cnt < length) {
1242                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1243                                                 __func__, length - cnt);
1244                         if (cnt == 0)
1245                                 break;
1246                 }
1247                 tty_flip_buffer_push(tty);
1248                 data += cnt;
1249                 length -= cnt;
1250         } while (length > 0);
1251
1252 }
1253
1254
1255 static void ti_send(struct ti_port *tport)
1256 {
1257         int count, result;
1258         struct usb_serial_port *port = tport->tp_port;
1259         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1260         unsigned long flags;
1261
1262         spin_lock_irqsave(&tport->tp_lock, flags);
1263
1264         if (tport->tp_write_urb_in_use)
1265                 goto unlock;
1266
1267         count = kfifo_out(&tport->write_fifo,
1268                                 port->write_urb->transfer_buffer,
1269                                 port->bulk_out_size);
1270
1271         if (count == 0)
1272                 goto unlock;
1273
1274         tport->tp_write_urb_in_use = 1;
1275
1276         spin_unlock_irqrestore(&tport->tp_lock, flags);
1277
1278         usb_serial_debug_data(debug, &port->dev, __func__, count,
1279                                         port->write_urb->transfer_buffer);
1280
1281         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1282                            usb_sndbulkpipe(port->serial->dev,
1283                                             port->bulk_out_endpointAddress),
1284                            port->write_urb->transfer_buffer, count,
1285                            ti_bulk_out_callback, tport);
1286
1287         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1288         if (result) {
1289                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1290                                                         __func__, result);
1291                 tport->tp_write_urb_in_use = 0;
1292                 /* TODO: reschedule ti_send */
1293         } else {
1294                 spin_lock_irqsave(&tport->tp_lock, flags);
1295                 tport->tp_icount.tx += count;
1296                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1297         }
1298
1299         /* more room in the buffer for new writes, wakeup */
1300         if (tty)
1301                 tty_wakeup(tty);
1302         tty_kref_put(tty);
1303         wake_up_interruptible(&tport->tp_write_wait);
1304         return;
1305 unlock:
1306         spin_unlock_irqrestore(&tport->tp_lock, flags);
1307         tty_kref_put(tty);
1308         return;
1309 }
1310
1311
1312 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1313 {
1314         unsigned long flags;
1315         int status;
1316
1317         status = ti_write_byte(tport->tp_tdev,
1318                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1319                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1320
1321         spin_lock_irqsave(&tport->tp_lock, flags);
1322         if (!status)
1323                 tport->tp_shadow_mcr = mcr;
1324         spin_unlock_irqrestore(&tport->tp_lock, flags);
1325
1326         return status;
1327 }
1328
1329
1330 static int ti_get_lsr(struct ti_port *tport)
1331 {
1332         int size, status;
1333         struct ti_device *tdev = tport->tp_tdev;
1334         struct usb_serial_port *port = tport->tp_port;
1335         int port_number = port->number - port->serial->minor;
1336         struct ti_port_status *data;
1337
1338         size = sizeof(struct ti_port_status);
1339         data = kmalloc(size, GFP_KERNEL);
1340         if (!data) {
1341                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1342                 return -ENOMEM;
1343         }
1344
1345         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1346                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1347         if (status) {
1348                 dev_err(&port->dev,
1349                         "%s - get port status command failed, %d\n",
1350                                                         __func__, status);
1351                 goto free_data;
1352         }
1353
1354         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1355
1356         tport->tp_lsr = data->bLSR;
1357
1358 free_data:
1359         kfree(data);
1360         return status;
1361 }
1362
1363
1364 static int ti_get_serial_info(struct ti_port *tport,
1365         struct serial_struct __user *ret_arg)
1366 {
1367         struct usb_serial_port *port = tport->tp_port;
1368         struct serial_struct ret_serial;
1369
1370         if (!ret_arg)
1371                 return -EFAULT;
1372
1373         memset(&ret_serial, 0, sizeof(ret_serial));
1374
1375         ret_serial.type = PORT_16550A;
1376         ret_serial.line = port->serial->minor;
1377         ret_serial.port = port->number - port->serial->minor;
1378         ret_serial.flags = tport->tp_flags;
1379         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1380         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1381         ret_serial.closing_wait = tport->tp_closing_wait;
1382
1383         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1384                 return -EFAULT;
1385
1386         return 0;
1387 }
1388
1389
1390 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1391         struct serial_struct __user *new_arg)
1392 {
1393         struct serial_struct new_serial;
1394
1395         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1396                 return -EFAULT;
1397
1398         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1399         tport->tp_closing_wait = new_serial.closing_wait;
1400
1401         return 0;
1402 }
1403
1404
1405 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1406 {
1407         struct async_icount *icount;
1408         struct tty_struct *tty;
1409         unsigned long flags;
1410
1411         dbg("%s - msr 0x%02X", __func__, msr);
1412
1413         if (msr & TI_MSR_DELTA_MASK) {
1414                 spin_lock_irqsave(&tport->tp_lock, flags);
1415                 icount = &tport->tp_icount;
1416                 if (msr & TI_MSR_DELTA_CTS)
1417                         icount->cts++;
1418                 if (msr & TI_MSR_DELTA_DSR)
1419                         icount->dsr++;
1420                 if (msr & TI_MSR_DELTA_CD)
1421                         icount->dcd++;
1422                 if (msr & TI_MSR_DELTA_RI)
1423                         icount->rng++;
1424                 wake_up_interruptible(&tport->tp_msr_wait);
1425                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1426         }
1427
1428         tport->tp_msr = msr & TI_MSR_MASK;
1429
1430         /* handle CTS flow control */
1431         tty = tty_port_tty_get(&tport->tp_port->port);
1432         if (tty && C_CRTSCTS(tty)) {
1433                 if (msr & TI_MSR_CTS) {
1434                         tty->hw_stopped = 0;
1435                         tty_wakeup(tty);
1436                 } else {
1437                         tty->hw_stopped = 1;
1438                 }
1439         }
1440         tty_kref_put(tty);
1441 }
1442
1443
1444 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1445 {
1446         struct ti_device *tdev = tport->tp_tdev;
1447         struct usb_serial_port *port = tport->tp_port;
1448         wait_queue_t wait;
1449
1450         spin_lock_irq(&tport->tp_lock);
1451
1452         /* wait for data to drain from the buffer */
1453         tdev->td_urb_error = 0;
1454         init_waitqueue_entry(&wait, current);
1455         add_wait_queue(&tport->tp_write_wait, &wait);
1456         for (;;) {
1457                 set_current_state(TASK_INTERRUPTIBLE);
1458                 if (kfifo_len(&tport->write_fifo) == 0
1459                 || timeout == 0 || signal_pending(current)
1460                 || tdev->td_urb_error
1461                 || port->serial->disconnected)  /* disconnect */
1462                         break;
1463                 spin_unlock_irq(&tport->tp_lock);
1464                 timeout = schedule_timeout(timeout);
1465                 spin_lock_irq(&tport->tp_lock);
1466         }
1467         set_current_state(TASK_RUNNING);
1468         remove_wait_queue(&tport->tp_write_wait, &wait);
1469
1470         /* flush any remaining data in the buffer */
1471         if (flush)
1472                 kfifo_reset_out(&tport->write_fifo);
1473
1474         spin_unlock_irq(&tport->tp_lock);
1475
1476         mutex_lock(&port->serial->disc_mutex);
1477         /* wait for data to drain from the device */
1478         /* wait for empty tx register, plus 20 ms */
1479         timeout += jiffies;
1480         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1481         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1482         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1483         && !port->serial->disconnected) {
1484                 if (ti_get_lsr(tport))
1485                         break;
1486                 mutex_unlock(&port->serial->disc_mutex);
1487                 msleep_interruptible(20);
1488                 mutex_lock(&port->serial->disc_mutex);
1489         }
1490         mutex_unlock(&port->serial->disc_mutex);
1491 }
1492
1493
1494 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1495 {
1496         unsigned long flags;
1497
1498         spin_lock_irqsave(&tport->tp_lock, flags);
1499
1500         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1501                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1502
1503         spin_unlock_irqrestore(&tport->tp_lock, flags);
1504 }
1505
1506
1507 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1508 {
1509         struct urb *urb;
1510         int status = 0;
1511         unsigned long flags;
1512
1513         spin_lock_irqsave(&tport->tp_lock, flags);
1514
1515         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1516                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1517                 urb = tport->tp_port->read_urb;
1518                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1519                 urb->context = tport;
1520                 status = usb_submit_urb(urb, GFP_KERNEL);
1521         } else  {
1522                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1523                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1524         }
1525
1526         return status;
1527 }
1528
1529
1530 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1531         __u16 moduleid, __u16 value, __u8 *data, int size)
1532 {
1533         int status;
1534
1535         status = usb_control_msg(tdev->td_serial->dev,
1536                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1537                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1538                 value, moduleid, data, size, 1000);
1539
1540         if (status == size)
1541                 status = 0;
1542
1543         if (status > 0)
1544                 status = -ECOMM;
1545
1546         return status;
1547 }
1548
1549
1550 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1551         __u16 moduleid, __u16 value, __u8 *data, int size)
1552 {
1553         int status;
1554
1555         status = usb_control_msg(tdev->td_serial->dev,
1556                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1557                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1558                 value, moduleid, data, size, 1000);
1559
1560         if (status == size)
1561                 status = 0;
1562
1563         if (status > 0)
1564                 status = -ECOMM;
1565
1566         return status;
1567 }
1568
1569
1570 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1571         __u8 mask, __u8 byte)
1572 {
1573         int status;
1574         unsigned int size;
1575         struct ti_write_data_bytes *data;
1576         struct device *dev = &tdev->td_serial->dev->dev;
1577
1578         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1579                                         __func__, addr, mask, byte);
1580
1581         size = sizeof(struct ti_write_data_bytes) + 2;
1582         data = kmalloc(size, GFP_KERNEL);
1583         if (!data) {
1584                 dev_err(dev, "%s - out of memory\n", __func__);
1585                 return -ENOMEM;
1586         }
1587
1588         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1589         data->bDataType = TI_RW_DATA_BYTE;
1590         data->bDataCounter = 1;
1591         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1592         data->wBaseAddrLo = cpu_to_be16(addr);
1593         data->bData[0] = mask;
1594         data->bData[1] = byte;
1595
1596         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1597                 (__u8 *)data, size);
1598
1599         if (status < 0)
1600                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1601
1602         kfree(data);
1603
1604         return status;
1605 }
1606
1607 static int ti_do_download(struct usb_device *dev, int pipe,
1608                                                 u8 *buffer, int size)
1609 {
1610         int pos;
1611         u8 cs = 0;
1612         int done;
1613         struct ti_firmware_header *header;
1614         int status = 0;
1615         int len;
1616
1617         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1618                 cs = (__u8)(cs + buffer[pos]);
1619
1620         header = (struct ti_firmware_header *)buffer;
1621         header->wLength = cpu_to_le16((__u16)(size
1622                                         - sizeof(struct ti_firmware_header)));
1623         header->bCheckSum = cs;
1624
1625         dbg("%s - downloading firmware", __func__);
1626         for (pos = 0; pos < size; pos += done) {
1627                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1628                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1629                                                                 &done, 1000);
1630                 if (status)
1631                         break;
1632         }
1633         return status;
1634 }
1635
1636 static int ti_download_firmware(struct ti_device *tdev)
1637 {
1638         int status;
1639         int buffer_size;
1640         __u8 *buffer;
1641         struct usb_device *dev = tdev->td_serial->dev;
1642         unsigned int pipe = usb_sndbulkpipe(dev,
1643                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1644         const struct firmware *fw_p;
1645         char buf[32];
1646
1647         /* try ID specific firmware first, then try generic firmware */
1648         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1649             dev->descriptor.idProduct);
1650         status = request_firmware(&fw_p, buf, &dev->dev);
1651
1652         if (status != 0) {
1653                 buf[0] = '\0';
1654                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1655                         switch (dev->descriptor.idProduct) {
1656                         case MTS_CDMA_PRODUCT_ID:
1657                                 strcpy(buf, "mts_cdma.fw");
1658                                 break;
1659                         case MTS_GSM_PRODUCT_ID:
1660                                 strcpy(buf, "mts_gsm.fw");
1661                                 break;
1662                         case MTS_EDGE_PRODUCT_ID:
1663                                 strcpy(buf, "mts_edge.fw");
1664                                 break;
1665                         case MTS_MT9234MU_PRODUCT_ID:
1666                                 strcpy(buf, "mts_mt9234mu.fw");
1667                                 break;
1668                         case MTS_MT9234ZBA_PRODUCT_ID:
1669                                 strcpy(buf, "mts_mt9234zba.fw");
1670                                 break;
1671                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1672                                 strcpy(buf, "mts_mt9234zba.fw");
1673                                 break;                  }
1674                 }
1675                 if (buf[0] == '\0') {
1676                         if (tdev->td_is_3410)
1677                                 strcpy(buf, "ti_3410.fw");
1678                         else
1679                                 strcpy(buf, "ti_5052.fw");
1680                 }
1681                 status = request_firmware(&fw_p, buf, &dev->dev);
1682         }
1683         if (status) {
1684                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1685                 return -ENOENT;
1686         }
1687         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1688                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1689                 release_firmware(fw_p);
1690                 return -ENOENT;
1691         }
1692
1693         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1694         buffer = kmalloc(buffer_size, GFP_KERNEL);
1695         if (buffer) {
1696                 memcpy(buffer, fw_p->data, fw_p->size);
1697                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1698                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1699                 kfree(buffer);
1700         } else {
1701                 dbg("%s ENOMEM\n", __func__);
1702                 status = -ENOMEM;
1703         }
1704         release_firmware(fw_p);
1705         if (status) {
1706                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1707                                                         __func__, status);
1708                 return status;
1709         }
1710
1711         dbg("%s - download successful", __func__);
1712
1713         return 0;
1714 }