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[15+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         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 184 };
 185
 186 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 190         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 191 };
 192
 193 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 194         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 195         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 203         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 207         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 210         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 211         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 212         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 213         { }
 214 };
 215
 216 static struct usb_serial_driver ti_1port_device = {
 217         .driver = {
 218                 .owner          = THIS_MODULE,
 219                 .name           = "ti_usb_3410_5052_1",
 220         },
 221         .description            = "TI USB 3410 1 port adapter",
 222         .id_table               = ti_id_table_3410,
 223         .num_ports              = 1,
 224         .attach                 = ti_startup,
 225         .release                = ti_release,
 226         .open                   = ti_open,
 227         .close                  = ti_close,
 228         .write                  = ti_write,
 229         .write_room             = ti_write_room,
 230         .chars_in_buffer        = ti_chars_in_buffer,
 231         .throttle               = ti_throttle,
 232         .unthrottle             = ti_unthrottle,
 233         .ioctl                  = ti_ioctl,
 234         .set_termios            = ti_set_termios,
 235         .tiocmget               = ti_tiocmget,
 236         .tiocmset               = ti_tiocmset,
 237         .get_icount             = ti_get_icount,
 238         .break_ctl              = ti_break,
 239         .read_int_callback      = ti_interrupt_callback,
 240         .read_bulk_callback     = ti_bulk_in_callback,
 241         .write_bulk_callback    = ti_bulk_out_callback,
 242 };
 243
 244 static struct usb_serial_driver ti_2port_device = {
 245         .driver = {
 246                 .owner          = THIS_MODULE,
 247                 .name           = "ti_usb_3410_5052_2",
 248         },
 249         .description            = "TI USB 5052 2 port adapter",
 250         .id_table               = ti_id_table_5052,
 251         .num_ports              = 2,
 252         .attach                 = ti_startup,
 253         .release                = ti_release,
 254         .open                   = ti_open,
 255         .close                  = ti_close,
 256         .write                  = ti_write,
 257         .write_room             = ti_write_room,
 258         .chars_in_buffer        = ti_chars_in_buffer,
 259         .throttle               = ti_throttle,
 260         .unthrottle             = ti_unthrottle,
 261         .ioctl                  = ti_ioctl,
 262         .set_termios            = ti_set_termios,
 263         .tiocmget               = ti_tiocmget,
 264         .tiocmset               = ti_tiocmset,
 265         .get_icount             = ti_get_icount,
 266         .break_ctl              = ti_break,
 267         .read_int_callback      = ti_interrupt_callback,
 268         .read_bulk_callback     = ti_bulk_in_callback,
 269         .write_bulk_callback    = ti_bulk_out_callback,
 270 };
 271
 272 static struct usb_serial_driver * const serial_drivers[] = {
 273         &ti_1port_device, &ti_2port_device, NULL
 274 };
 275
 276 /* Module */
 277
 278 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 279 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 280 MODULE_VERSION(TI_DRIVER_VERSION);
 281 MODULE_LICENSE("GPL");
 282
 283 MODULE_FIRMWARE("ti_3410.fw");
 284 MODULE_FIRMWARE("ti_5052.fw");
 285 MODULE_FIRMWARE("mts_cdma.fw");
 286 MODULE_FIRMWARE("mts_gsm.fw");
 287 MODULE_FIRMWARE("mts_edge.fw");
 288 MODULE_FIRMWARE("mts_mt9234mu.fw");
 289 MODULE_FIRMWARE("mts_mt9234zba.fw");
 290
 291 module_param(debug, bool, S_IRUGO | S_IWUSR);
 292 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 293
 294 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 295 MODULE_PARM_DESC(closing_wait,
 296     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 297
 298 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 299 MODULE_PARM_DESC(vendor_3410,
 300                 "Vendor ids for 3410 based devices, 1-5 short integers");
 301 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 302 MODULE_PARM_DESC(product_3410,
 303                 "Product ids for 3410 based devices, 1-5 short integers");
 304 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 305 MODULE_PARM_DESC(vendor_5052,
 306                 "Vendor ids for 5052 based devices, 1-5 short integers");
 307 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 308 MODULE_PARM_DESC(product_5052,
 309                 "Product ids for 5052 based devices, 1-5 short integers");
 310
 311 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 312
 313
 314 /* Functions */
 315
 316 static int __init ti_init(void)
 317 {
 318         int i, j, c;
 319         int ret;
 320
 321         /* insert extra vendor and product ids */
 322         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 323         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 324         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 325                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 326                 ti_id_table_3410[j].idProduct = product_3410[i];
 327                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 328                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 329                 ti_id_table_combined[c].idProduct = product_3410[i];
 330                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 331         }
 332         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 333         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 334                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 335                 ti_id_table_5052[j].idProduct = product_5052[i];
 336                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 337                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 338                 ti_id_table_combined[c].idProduct = product_5052[i];
 339                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 340         }
 341
 342         ret = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 343         if (ret == 0)
 344                 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 345                                TI_DRIVER_DESC "\n");
 346         return ret;
 347 }
 348
 349 static void __exit ti_exit(void)
 350 {
 351         usb_serial_deregister_drivers(serial_drivers);
 352 }
 353
 354 module_init(ti_init);
 355 module_exit(ti_exit);
 356
 357
 358 static int ti_startup(struct usb_serial *serial)
 359 {
 360         struct ti_device *tdev;
 361         struct ti_port *tport;
 362         struct usb_device *dev = serial->dev;
 363         int status;
 364         int i;
 365
 366
 367         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 368             __func__, le16_to_cpu(dev->descriptor.idProduct),
 369             dev->descriptor.bNumConfigurations,
 370             dev->actconfig->desc.bConfigurationValue);
 371
 372         /* create device structure */
 373         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 374         if (tdev == NULL) {
 375                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 376                 return -ENOMEM;
 377         }
 378         mutex_init(&tdev->td_open_close_lock);
 379         tdev->td_serial = serial;
 380         usb_set_serial_data(serial, tdev);
 381
 382         /* determine device type */
 383         if (usb_match_id(serial->interface, ti_id_table_3410))
 384                 tdev->td_is_3410 = 1;
 385         dbg("%s - device type is %s", __func__,
 386                                 tdev->td_is_3410 ? "3410" : "5052");
 387
 388         /* if we have only 1 configuration, download firmware */
 389         if (dev->descriptor.bNumConfigurations == 1) {
 390                 status = ti_download_firmware(tdev);
 391
 392                 if (status != 0)
 393                         goto free_tdev;
 394
 395                 /* 3410 must be reset, 5052 resets itself */
 396                 if (tdev->td_is_3410) {
 397                         msleep_interruptible(100);
 398                         usb_reset_device(dev);
 399                 }
 400
 401                 status = -ENODEV;
 402                 goto free_tdev;
 403         }
 404
 405         /* the second configuration must be set */
 406         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 407                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 408                 status = status ? status : -ENODEV;
 409                 goto free_tdev;
 410         }
 411
 412         /* set up port structures */
 413         for (i = 0; i < serial->num_ports; ++i) {
 414                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 415                 if (tport == NULL) {
 416                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 417                         status = -ENOMEM;
 418                         goto free_tports;
 419                 }
 420                 spin_lock_init(&tport->tp_lock);
 421                 tport->tp_uart_base_addr = (i == 0 ?
 422                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 423                 tport->tp_closing_wait = closing_wait;
 424                 init_waitqueue_head(&tport->tp_msr_wait);
 425                 init_waitqueue_head(&tport->tp_write_wait);
 426                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 427                                                                 GFP_KERNEL)) {
 428                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 429                         kfree(tport);
 430                         status = -ENOMEM;
 431                         goto free_tports;
 432                 }
 433                 tport->tp_port = serial->port[i];
 434                 tport->tp_tdev = tdev;
 435                 usb_set_serial_port_data(serial->port[i], tport);
 436                 tport->tp_uart_mode = 0;        /* default is RS232 */
 437         }
 438
 439         return 0;
 440
 441 free_tports:
 442         for (--i; i >= 0; --i) {
 443                 tport = usb_get_serial_port_data(serial->port[i]);
 444                 kfifo_free(&tport->write_fifo);
 445                 kfree(tport);
 446                 usb_set_serial_port_data(serial->port[i], NULL);
 447         }
 448 free_tdev:
 449         kfree(tdev);
 450         usb_set_serial_data(serial, NULL);
 451         return status;
 452 }
 453
 454
 455 static void ti_release(struct usb_serial *serial)
 456 {
 457         int i;
 458         struct ti_device *tdev = usb_get_serial_data(serial);
 459         struct ti_port *tport;
 460
 461         for (i = 0; i < serial->num_ports; ++i) {
 462                 tport = usb_get_serial_port_data(serial->port[i]);
 463                 if (tport) {
 464                         kfifo_free(&tport->write_fifo);
 465                         kfree(tport);
 466                 }
 467         }
 468
 469         kfree(tdev);
 470 }
 471
 472
 473 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 474 {
 475         struct ti_port *tport = usb_get_serial_port_data(port);
 476         struct ti_device *tdev;
 477         struct usb_device *dev;
 478         struct urb *urb;
 479         int port_number;
 480         int status;
 481         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 482                              TI_PIPE_TIMEOUT_ENABLE |
 483                              (TI_TRANSFER_TIMEOUT << 2));
 484
 485         if (tport == NULL)
 486                 return -ENODEV;
 487
 488         dev = port->serial->dev;
 489         tdev = tport->tp_tdev;
 490
 491         /* only one open on any port on a device at a time */
 492         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 493                 return -ERESTARTSYS;
 494
 495         port_number = port->number - port->serial->minor;
 496
 497         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 498
 499         tport->tp_msr = 0;
 500         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 501
 502         /* start interrupt urb the first time a port is opened on this device */
 503         if (tdev->td_open_port_count == 0) {
 504                 dbg("%s - start interrupt in urb", __func__);
 505                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 506                 if (!urb) {
 507                         dev_err(&port->dev, "%s - no interrupt urb\n",
 508                                                                 __func__);
 509                         status = -EINVAL;
 510                         goto release_lock;
 511                 }
 512                 urb->context = tdev;
 513                 status = usb_submit_urb(urb, GFP_KERNEL);
 514                 if (status) {
 515                         dev_err(&port->dev,
 516                                 "%s - submit interrupt urb failed, %d\n",
 517                                         __func__, status);
 518                         goto release_lock;
 519                 }
 520         }
 521
 522         if (tty)
 523                 ti_set_termios(tty, port, tty->termios);
 524
 525         dbg("%s - sending TI_OPEN_PORT", __func__);
 526         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 527                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 528         if (status) {
 529                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 530                                                         __func__, status);
 531                 goto unlink_int_urb;
 532         }
 533
 534         dbg("%s - sending TI_START_PORT", __func__);
 535         status = ti_command_out_sync(tdev, TI_START_PORT,
 536                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 537         if (status) {
 538                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 539                                                         __func__, status);
 540                 goto unlink_int_urb;
 541         }
 542
 543         dbg("%s - sending TI_PURGE_PORT", __func__);
 544         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 545                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 546         if (status) {
 547                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 548                                                         __func__, status);
 549                 goto unlink_int_urb;
 550         }
 551         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 552                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 553         if (status) {
 554                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 555                                                         __func__, status);
 556                 goto unlink_int_urb;
 557         }
 558
 559         /* reset the data toggle on the bulk endpoints to work around bug in
 560          * host controllers where things get out of sync some times */
 561         usb_clear_halt(dev, port->write_urb->pipe);
 562         usb_clear_halt(dev, port->read_urb->pipe);
 563
 564         if (tty)
 565                 ti_set_termios(tty, port, tty->termios);
 566
 567         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 568         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 569                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 570         if (status) {
 571                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 572                                                         __func__, status);
 573                 goto unlink_int_urb;
 574         }
 575
 576         dbg("%s - sending TI_START_PORT (2)", __func__);
 577         status = ti_command_out_sync(tdev, TI_START_PORT,
 578                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 579         if (status) {
 580                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 581                                                         __func__, status);
 582                 goto unlink_int_urb;
 583         }
 584
 585         /* start read urb */
 586         dbg("%s - start read urb", __func__);
 587         urb = port->read_urb;
 588         if (!urb) {
 589                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 590                 status = -EINVAL;
 591                 goto unlink_int_urb;
 592         }
 593         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 594         urb->context = tport;
 595         status = usb_submit_urb(urb, GFP_KERNEL);
 596         if (status) {
 597                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 598                                                         __func__, status);
 599                 goto unlink_int_urb;
 600         }
 601
 602         tport->tp_is_open = 1;
 603         ++tdev->td_open_port_count;
 604
 605         goto release_lock;
 606
 607 unlink_int_urb:
 608         if (tdev->td_open_port_count == 0)
 609                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 610 release_lock:
 611         mutex_unlock(&tdev->td_open_close_lock);
 612         dbg("%s - exit %d", __func__, status);
 613         return status;
 614 }
 615
 616
 617 static void ti_close(struct usb_serial_port *port)
 618 {
 619         struct ti_device *tdev;
 620         struct ti_port *tport;
 621         int port_number;
 622         int status;
 623         int do_unlock;
 624
 625         tdev = usb_get_serial_data(port->serial);
 626         tport = usb_get_serial_port_data(port);
 627         if (tdev == NULL || tport == NULL)
 628                 return;
 629
 630         tport->tp_is_open = 0;
 631
 632         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 633
 634         usb_kill_urb(port->read_urb);
 635         usb_kill_urb(port->write_urb);
 636         tport->tp_write_urb_in_use = 0;
 637
 638         port_number = port->number - port->serial->minor;
 639
 640         dbg("%s - sending TI_CLOSE_PORT", __func__);
 641         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 642                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 643         if (status)
 644                 dev_err(&port->dev,
 645                         "%s - cannot send close port command, %d\n"
 646                                                         , __func__, status);
 647
 648         /* if mutex_lock is interrupted, continue anyway */
 649         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 650         --tport->tp_tdev->td_open_port_count;
 651         if (tport->tp_tdev->td_open_port_count <= 0) {
 652                 /* last port is closed, shut down interrupt urb */
 653                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 654                 tport->tp_tdev->td_open_port_count = 0;
 655         }
 656         if (do_unlock)
 657                 mutex_unlock(&tdev->td_open_close_lock);
 658 }
 659
 660
 661 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 662                         const unsigned char *data, int count)
 663 {
 664         struct ti_port *tport = usb_get_serial_port_data(port);
 665
 666         if (count == 0) {
 667                 dbg("%s - write request of 0 bytes", __func__);
 668                 return 0;
 669         }
 670
 671         if (tport == NULL || !tport->tp_is_open)
 672                 return -ENODEV;
 673
 674         count = kfifo_in_locked(&tport->write_fifo, data, count,
 675                                                         &tport->tp_lock);
 676         ti_send(tport);
 677
 678         return count;
 679 }
 680
 681
 682 static int ti_write_room(struct tty_struct *tty)
 683 {
 684         struct usb_serial_port *port = tty->driver_data;
 685         struct ti_port *tport = usb_get_serial_port_data(port);
 686         int room = 0;
 687         unsigned long flags;
 688
 689         if (tport == NULL)
 690                 return 0;
 691
 692         spin_lock_irqsave(&tport->tp_lock, flags);
 693         room = kfifo_avail(&tport->write_fifo);
 694         spin_unlock_irqrestore(&tport->tp_lock, flags);
 695
 696         dbg("%s - returns %d", __func__, room);
 697         return room;
 698 }
 699
 700
 701 static int ti_chars_in_buffer(struct tty_struct *tty)
 702 {
 703         struct usb_serial_port *port = tty->driver_data;
 704         struct ti_port *tport = usb_get_serial_port_data(port);
 705         int chars = 0;
 706         unsigned long flags;
 707
 708         if (tport == NULL)
 709                 return 0;
 710
 711         spin_lock_irqsave(&tport->tp_lock, flags);
 712         chars = kfifo_len(&tport->write_fifo);
 713         spin_unlock_irqrestore(&tport->tp_lock, flags);
 714
 715         dbg("%s - returns %d", __func__, chars);
 716         return chars;
 717 }
 718
 719
 720 static void ti_throttle(struct tty_struct *tty)
 721 {
 722         struct usb_serial_port *port = tty->driver_data;
 723         struct ti_port *tport = usb_get_serial_port_data(port);
 724
 725         if (tport == NULL)
 726                 return;
 727
 728         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 729                 ti_stop_read(tport, tty);
 730
 731 }
 732
 733
 734 static void ti_unthrottle(struct tty_struct *tty)
 735 {
 736         struct usb_serial_port *port = tty->driver_data;
 737         struct ti_port *tport = usb_get_serial_port_data(port);
 738         int status;
 739
 740         if (tport == NULL)
 741                 return;
 742
 743         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 744                 status = ti_restart_read(tport, tty);
 745                 if (status)
 746                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 747                                                         __func__, status);
 748         }
 749 }
 750
 751 static int ti_get_icount(struct tty_struct *tty,
 752                 struct serial_icounter_struct *icount)
 753 {
 754         struct usb_serial_port *port = tty->driver_data;
 755         struct ti_port *tport = usb_get_serial_port_data(port);
 756         struct async_icount cnow = tport->tp_icount;
 757
 758         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 759                 __func__, port->number,
 760                 cnow.rx, cnow.tx);
 761
 762         icount->cts = cnow.cts;
 763         icount->dsr = cnow.dsr;
 764         icount->rng = cnow.rng;
 765         icount->dcd = cnow.dcd;
 766         icount->rx = cnow.rx;
 767         icount->tx = cnow.tx;
 768         icount->frame = cnow.frame;
 769         icount->overrun = cnow.overrun;
 770         icount->parity = cnow.parity;
 771         icount->brk = cnow.brk;
 772         icount->buf_overrun = cnow.buf_overrun;
 773
 774         return 0;
 775 }
 776
 777 static int ti_ioctl(struct tty_struct *tty,
 778         unsigned int cmd, unsigned long arg)
 779 {
 780         struct usb_serial_port *port = tty->driver_data;
 781         struct ti_port *tport = usb_get_serial_port_data(port);
 782         struct async_icount cnow;
 783         struct async_icount cprev;
 784
 785         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 786
 787         if (tport == NULL)
 788                 return -ENODEV;
 789
 790         switch (cmd) {
 791         case TIOCGSERIAL:
 792                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 793                 return ti_get_serial_info(tport,
 794                                 (struct serial_struct __user *)arg);
 795         case TIOCSSERIAL:
 796                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 797                 return ti_set_serial_info(tty, tport,
 798                                 (struct serial_struct __user *)arg);
 799         case TIOCMIWAIT:
 800                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 801                 cprev = tport->tp_icount;
 802                 while (1) {
 803                         interruptible_sleep_on(&tport->tp_msr_wait);
 804                         if (signal_pending(current))
 805                                 return -ERESTARTSYS;
 806                         cnow = tport->tp_icount;
 807                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 808                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 809                                 return -EIO; /* no change => error */
 810                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 811                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 812                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 813                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 814                                 return 0;
 815                         cprev = cnow;
 816                 }
 817                 break;
 818         }
 819         return -ENOIOCTLCMD;
 820 }
 821
 822
 823 static void ti_set_termios(struct tty_struct *tty,
 824                 struct usb_serial_port *port, struct ktermios *old_termios)
 825 {
 826         struct ti_port *tport = usb_get_serial_port_data(port);
 827         struct ti_uart_config *config;
 828         tcflag_t cflag, iflag;
 829         int baud;
 830         int status;
 831         int port_number = port->number - port->serial->minor;
 832         unsigned int mcr;
 833
 834         cflag = tty->termios->c_cflag;
 835         iflag = tty->termios->c_iflag;
 836
 837         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 838         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 839                                 old_termios->c_cflag, old_termios->c_iflag);
 840
 841         if (tport == NULL)
 842                 return;
 843
 844         config = kmalloc(sizeof(*config), GFP_KERNEL);
 845         if (!config) {
 846                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 847                 return;
 848         }
 849
 850         config->wFlags = 0;
 851
 852         /* these flags must be set */
 853         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 854         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 855         config->bUartMode = (__u8)(tport->tp_uart_mode);
 856
 857         switch (cflag & CSIZE) {
 858         case CS5:
 859                     config->bDataBits = TI_UART_5_DATA_BITS;
 860                     break;
 861         case CS6:
 862                     config->bDataBits = TI_UART_6_DATA_BITS;
 863                     break;
 864         case CS7:
 865                     config->bDataBits = TI_UART_7_DATA_BITS;
 866                     break;
 867         default:
 868         case CS8:
 869                     config->bDataBits = TI_UART_8_DATA_BITS;
 870                     break;
 871         }
 872
 873         /* CMSPAR isn't supported by this driver */
 874         tty->termios->c_cflag &= ~CMSPAR;
 875
 876         if (cflag & PARENB) {
 877                 if (cflag & PARODD) {
 878                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 879                         config->bParity = TI_UART_ODD_PARITY;
 880                 } else {
 881                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 882                         config->bParity = TI_UART_EVEN_PARITY;
 883                 }
 884         } else {
 885                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 886                 config->bParity = TI_UART_NO_PARITY;
 887         }
 888
 889         if (cflag & CSTOPB)
 890                 config->bStopBits = TI_UART_2_STOP_BITS;
 891         else
 892                 config->bStopBits = TI_UART_1_STOP_BITS;
 893
 894         if (cflag & CRTSCTS) {
 895                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 896                 if ((cflag & CBAUD) != B0)
 897                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 898                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 899         } else {
 900                 tty->hw_stopped = 0;
 901                 ti_restart_read(tport, tty);
 902         }
 903
 904         if (I_IXOFF(tty) || I_IXON(tty)) {
 905                 config->cXon  = START_CHAR(tty);
 906                 config->cXoff = STOP_CHAR(tty);
 907
 908                 if (I_IXOFF(tty))
 909                         config->wFlags |= TI_UART_ENABLE_X_IN;
 910                 else
 911                         ti_restart_read(tport, tty);
 912
 913                 if (I_IXON(tty))
 914                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 915         }
 916
 917         baud = tty_get_baud_rate(tty);
 918         if (!baud)
 919                 baud = 9600;
 920         if (tport->tp_tdev->td_is_3410)
 921                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 922         else
 923                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 924
 925         /* FIXME: Should calculate resulting baud here and report it back */
 926         if ((cflag & CBAUD) != B0)
 927                 tty_encode_baud_rate(tty, baud, baud);
 928
 929         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 930         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 931
 932         cpu_to_be16s(&config->wBaudRate);
 933         cpu_to_be16s(&config->wFlags);
 934
 935         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 936                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 937                 sizeof(*config));
 938         if (status)
 939                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 940                                         __func__, port_number, status);
 941
 942         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 943         mcr = tport->tp_shadow_mcr;
 944         /* if baud rate is B0, clear RTS and DTR */
 945         if ((cflag & CBAUD) == B0)
 946                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 947         status = ti_set_mcr(tport, mcr);
 948         if (status)
 949                 dev_err(&port->dev,
 950                         "%s - cannot set modem control on port %d, %d\n",
 951                                                 __func__, port_number, status);
 952
 953         kfree(config);
 954 }
 955
 956
 957 static int ti_tiocmget(struct tty_struct *tty)
 958 {
 959         struct usb_serial_port *port = tty->driver_data;
 960         struct ti_port *tport = usb_get_serial_port_data(port);
 961         unsigned int result;
 962         unsigned int msr;
 963         unsigned int mcr;
 964         unsigned long flags;
 965
 966         if (tport == NULL)
 967                 return -ENODEV;
 968
 969         spin_lock_irqsave(&tport->tp_lock, flags);
 970         msr = tport->tp_msr;
 971         mcr = tport->tp_shadow_mcr;
 972         spin_unlock_irqrestore(&tport->tp_lock, flags);
 973
 974         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 975                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 976                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 977                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 978                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 979                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 980                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 981
 982         dbg("%s - 0x%04X", __func__, result);
 983
 984         return result;
 985 }
 986
 987
 988 static int ti_tiocmset(struct tty_struct *tty,
 989                                 unsigned int set, unsigned int clear)
 990 {
 991         struct usb_serial_port *port = tty->driver_data;
 992         struct ti_port *tport = usb_get_serial_port_data(port);
 993         unsigned int mcr;
 994         unsigned long flags;
 995
 996         if (tport == NULL)
 997                 return -ENODEV;
 998
 999         spin_lock_irqsave(&tport->tp_lock, flags);
1000         mcr = tport->tp_shadow_mcr;
1001
1002         if (set & TIOCM_RTS)
1003                 mcr |= TI_MCR_RTS;
1004         if (set & TIOCM_DTR)
1005                 mcr |= TI_MCR_DTR;
1006         if (set & TIOCM_LOOP)
1007                 mcr |= TI_MCR_LOOP;
1008
1009         if (clear & TIOCM_RTS)
1010                 mcr &= ~TI_MCR_RTS;
1011         if (clear & TIOCM_DTR)
1012                 mcr &= ~TI_MCR_DTR;
1013         if (clear & TIOCM_LOOP)
1014                 mcr &= ~TI_MCR_LOOP;
1015         spin_unlock_irqrestore(&tport->tp_lock, flags);
1016
1017         return ti_set_mcr(tport, mcr);
1018 }
1019
1020
1021 static void ti_break(struct tty_struct *tty, int break_state)
1022 {
1023         struct usb_serial_port *port = tty->driver_data;
1024         struct ti_port *tport = usb_get_serial_port_data(port);
1025         int status;
1026
1027         dbg("%s - state = %d", __func__, break_state);
1028
1029         if (tport == NULL)
1030                 return;
1031
1032         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1033
1034         status = ti_write_byte(tport->tp_tdev,
1035                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1036                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1037
1038         if (status)
1039                 dbg("%s - error setting break, %d", __func__, status);
1040 }
1041
1042
1043 static void ti_interrupt_callback(struct urb *urb)
1044 {
1045         struct ti_device *tdev = urb->context;
1046         struct usb_serial_port *port;
1047         struct usb_serial *serial = tdev->td_serial;
1048         struct ti_port *tport;
1049         struct device *dev = &urb->dev->dev;
1050         unsigned char *data = urb->transfer_buffer;
1051         int length = urb->actual_length;
1052         int port_number;
1053         int function;
1054         int status = urb->status;
1055         int retval;
1056         __u8 msr;
1057
1058         switch (status) {
1059         case 0:
1060                 break;
1061         case -ECONNRESET:
1062         case -ENOENT:
1063         case -ESHUTDOWN:
1064                 dbg("%s - urb shutting down, %d", __func__, status);
1065                 tdev->td_urb_error = 1;
1066                 return;
1067         default:
1068                 dev_err(dev, "%s - nonzero urb status, %d\n",
1069                         __func__, status);
1070                 tdev->td_urb_error = 1;
1071                 goto exit;
1072         }
1073
1074         if (length != 2) {
1075                 dbg("%s - bad packet size, %d", __func__, length);
1076                 goto exit;
1077         }
1078
1079         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1080                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1081                 goto exit;
1082         }
1083
1084         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1085         function = TI_GET_FUNC_FROM_CODE(data[0]);
1086
1087         dbg("%s - port_number %d, function %d, data 0x%02X",
1088                                 __func__, port_number, function, data[1]);
1089
1090         if (port_number >= serial->num_ports) {
1091                 dev_err(dev, "%s - bad port number, %d\n",
1092                                                 __func__, port_number);
1093                 goto exit;
1094         }
1095
1096         port = serial->port[port_number];
1097
1098         tport = usb_get_serial_port_data(port);
1099         if (!tport)
1100                 goto exit;
1101
1102         switch (function) {
1103         case TI_CODE_DATA_ERROR:
1104                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1105                                         __func__, port_number, data[1]);
1106                 break;
1107
1108         case TI_CODE_MODEM_STATUS:
1109                 msr = data[1];
1110                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1111                 ti_handle_new_msr(tport, msr);
1112                 break;
1113
1114         default:
1115                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1116                                                         __func__, data[1]);
1117                 break;
1118         }
1119
1120 exit:
1121         retval = usb_submit_urb(urb, GFP_ATOMIC);
1122         if (retval)
1123                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1124                         __func__, retval);
1125 }
1126
1127
1128 static void ti_bulk_in_callback(struct urb *urb)
1129 {
1130         struct ti_port *tport = urb->context;
1131         struct usb_serial_port *port = tport->tp_port;
1132         struct device *dev = &urb->dev->dev;
1133         int status = urb->status;
1134         int retval = 0;
1135         struct tty_struct *tty;
1136
1137         switch (status) {
1138         case 0:
1139                 break;
1140         case -ECONNRESET:
1141         case -ENOENT:
1142         case -ESHUTDOWN:
1143                 dbg("%s - urb shutting down, %d", __func__, status);
1144                 tport->tp_tdev->td_urb_error = 1;
1145                 wake_up_interruptible(&tport->tp_write_wait);
1146                 return;
1147         default:
1148                 dev_err(dev, "%s - nonzero urb status, %d\n",
1149                         __func__, status);
1150                 tport->tp_tdev->td_urb_error = 1;
1151                 wake_up_interruptible(&tport->tp_write_wait);
1152         }
1153
1154         if (status == -EPIPE)
1155                 goto exit;
1156
1157         if (status) {
1158                 dev_err(dev, "%s - stopping read!\n", __func__);
1159                 return;
1160         }
1161
1162         tty = tty_port_tty_get(&port->port);
1163         if (tty) {
1164                 if (urb->actual_length) {
1165                         usb_serial_debug_data(debug, dev, __func__,
1166                                 urb->actual_length, urb->transfer_buffer);
1167
1168                         if (!tport->tp_is_open)
1169                                 dbg("%s - port closed, dropping data",
1170                                         __func__);
1171                         else
1172                                 ti_recv(&urb->dev->dev, tty,
1173                                                 urb->transfer_buffer,
1174                                                 urb->actual_length);
1175                         spin_lock(&tport->tp_lock);
1176                         tport->tp_icount.rx += urb->actual_length;
1177                         spin_unlock(&tport->tp_lock);
1178                 }
1179                 tty_kref_put(tty);
1180         }
1181
1182 exit:
1183         /* continue to read unless stopping */
1184         spin_lock(&tport->tp_lock);
1185         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1186                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1187         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1188                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1189
1190         spin_unlock(&tport->tp_lock);
1191         if (retval)
1192                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1193                         __func__, retval);
1194 }
1195
1196
1197 static void ti_bulk_out_callback(struct urb *urb)
1198 {
1199         struct ti_port *tport = urb->context;
1200         struct usb_serial_port *port = tport->tp_port;
1201         int status = urb->status;
1202
1203         tport->tp_write_urb_in_use = 0;
1204
1205         switch (status) {
1206         case 0:
1207                 break;
1208         case -ECONNRESET:
1209         case -ENOENT:
1210         case -ESHUTDOWN:
1211                 dbg("%s - urb shutting down, %d", __func__, status);
1212                 tport->tp_tdev->td_urb_error = 1;
1213                 wake_up_interruptible(&tport->tp_write_wait);
1214                 return;
1215         default:
1216                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1217                         __func__, status);
1218                 tport->tp_tdev->td_urb_error = 1;
1219                 wake_up_interruptible(&tport->tp_write_wait);
1220         }
1221
1222         /* send any buffered data */
1223         ti_send(tport);
1224 }
1225
1226
1227 static void ti_recv(struct device *dev, struct tty_struct *tty,
1228         unsigned char *data, int length)
1229 {
1230         int cnt;
1231
1232         do {
1233                 cnt = tty_insert_flip_string(tty, data, length);
1234                 if (cnt < length) {
1235                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1236                                                 __func__, length - cnt);
1237                         if (cnt == 0)
1238                                 break;
1239                 }
1240                 tty_flip_buffer_push(tty);
1241                 data += cnt;
1242                 length -= cnt;
1243         } while (length > 0);
1244
1245 }
1246
1247
1248 static void ti_send(struct ti_port *tport)
1249 {
1250         int count, result;
1251         struct usb_serial_port *port = tport->tp_port;
1252         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1253         unsigned long flags;
1254
1255         spin_lock_irqsave(&tport->tp_lock, flags);
1256
1257         if (tport->tp_write_urb_in_use)
1258                 goto unlock;
1259
1260         count = kfifo_out(&tport->write_fifo,
1261                                 port->write_urb->transfer_buffer,
1262                                 port->bulk_out_size);
1263
1264         if (count == 0)
1265                 goto unlock;
1266
1267         tport->tp_write_urb_in_use = 1;
1268
1269         spin_unlock_irqrestore(&tport->tp_lock, flags);
1270
1271         usb_serial_debug_data(debug, &port->dev, __func__, count,
1272                                         port->write_urb->transfer_buffer);
1273
1274         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1275                            usb_sndbulkpipe(port->serial->dev,
1276                                             port->bulk_out_endpointAddress),
1277                            port->write_urb->transfer_buffer, count,
1278                            ti_bulk_out_callback, tport);
1279
1280         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1281         if (result) {
1282                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1283                                                         __func__, result);
1284                 tport->tp_write_urb_in_use = 0;
1285                 /* TODO: reschedule ti_send */
1286         } else {
1287                 spin_lock_irqsave(&tport->tp_lock, flags);
1288                 tport->tp_icount.tx += count;
1289                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1290         }
1291
1292         /* more room in the buffer for new writes, wakeup */
1293         if (tty)
1294                 tty_wakeup(tty);
1295         tty_kref_put(tty);
1296         wake_up_interruptible(&tport->tp_write_wait);
1297         return;
1298 unlock:
1299         spin_unlock_irqrestore(&tport->tp_lock, flags);
1300         tty_kref_put(tty);
1301         return;
1302 }
1303
1304
1305 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1306 {
1307         unsigned long flags;
1308         int status;
1309
1310         status = ti_write_byte(tport->tp_tdev,
1311                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1312                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1313
1314         spin_lock_irqsave(&tport->tp_lock, flags);
1315         if (!status)
1316                 tport->tp_shadow_mcr = mcr;
1317         spin_unlock_irqrestore(&tport->tp_lock, flags);
1318
1319         return status;
1320 }
1321
1322
1323 static int ti_get_lsr(struct ti_port *tport)
1324 {
1325         int size, status;
1326         struct ti_device *tdev = tport->tp_tdev;
1327         struct usb_serial_port *port = tport->tp_port;
1328         int port_number = port->number - port->serial->minor;
1329         struct ti_port_status *data;
1330
1331         size = sizeof(struct ti_port_status);
1332         data = kmalloc(size, GFP_KERNEL);
1333         if (!data) {
1334                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1335                 return -ENOMEM;
1336         }
1337
1338         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1339                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1340         if (status) {
1341                 dev_err(&port->dev,
1342                         "%s - get port status command failed, %d\n",
1343                                                         __func__, status);
1344                 goto free_data;
1345         }
1346
1347         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1348
1349         tport->tp_lsr = data->bLSR;
1350
1351 free_data:
1352         kfree(data);
1353         return status;
1354 }
1355
1356
1357 static int ti_get_serial_info(struct ti_port *tport,
1358         struct serial_struct __user *ret_arg)
1359 {
1360         struct usb_serial_port *port = tport->tp_port;
1361         struct serial_struct ret_serial;
1362
1363         if (!ret_arg)
1364                 return -EFAULT;
1365
1366         memset(&ret_serial, 0, sizeof(ret_serial));
1367
1368         ret_serial.type = PORT_16550A;
1369         ret_serial.line = port->serial->minor;
1370         ret_serial.port = port->number - port->serial->minor;
1371         ret_serial.flags = tport->tp_flags;
1372         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1373         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1374         ret_serial.closing_wait = tport->tp_closing_wait;
1375
1376         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1377                 return -EFAULT;
1378
1379         return 0;
1380 }
1381
1382
1383 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1384         struct serial_struct __user *new_arg)
1385 {
1386         struct serial_struct new_serial;
1387
1388         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1389                 return -EFAULT;
1390
1391         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1392         tport->tp_closing_wait = new_serial.closing_wait;
1393
1394         return 0;
1395 }
1396
1397
1398 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1399 {
1400         struct async_icount *icount;
1401         struct tty_struct *tty;
1402         unsigned long flags;
1403
1404         dbg("%s - msr 0x%02X", __func__, msr);
1405
1406         if (msr & TI_MSR_DELTA_MASK) {
1407                 spin_lock_irqsave(&tport->tp_lock, flags);
1408                 icount = &tport->tp_icount;
1409                 if (msr & TI_MSR_DELTA_CTS)
1410                         icount->cts++;
1411                 if (msr & TI_MSR_DELTA_DSR)
1412                         icount->dsr++;
1413                 if (msr & TI_MSR_DELTA_CD)
1414                         icount->dcd++;
1415                 if (msr & TI_MSR_DELTA_RI)
1416                         icount->rng++;
1417                 wake_up_interruptible(&tport->tp_msr_wait);
1418                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1419         }
1420
1421         tport->tp_msr = msr & TI_MSR_MASK;
1422
1423         /* handle CTS flow control */
1424         tty = tty_port_tty_get(&tport->tp_port->port);
1425         if (tty && C_CRTSCTS(tty)) {
1426                 if (msr & TI_MSR_CTS) {
1427                         tty->hw_stopped = 0;
1428                         tty_wakeup(tty);
1429                 } else {
1430                         tty->hw_stopped = 1;
1431                 }
1432         }
1433         tty_kref_put(tty);
1434 }
1435
1436
1437 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1438 {
1439         struct ti_device *tdev = tport->tp_tdev;
1440         struct usb_serial_port *port = tport->tp_port;
1441         wait_queue_t wait;
1442
1443         spin_lock_irq(&tport->tp_lock);
1444
1445         /* wait for data to drain from the buffer */
1446         tdev->td_urb_error = 0;
1447         init_waitqueue_entry(&wait, current);
1448         add_wait_queue(&tport->tp_write_wait, &wait);
1449         for (;;) {
1450                 set_current_state(TASK_INTERRUPTIBLE);
1451                 if (kfifo_len(&tport->write_fifo) == 0
1452                 || timeout == 0 || signal_pending(current)
1453                 || tdev->td_urb_error
1454                 || port->serial->disconnected)  /* disconnect */
1455                         break;
1456                 spin_unlock_irq(&tport->tp_lock);
1457                 timeout = schedule_timeout(timeout);
1458                 spin_lock_irq(&tport->tp_lock);
1459         }
1460         set_current_state(TASK_RUNNING);
1461         remove_wait_queue(&tport->tp_write_wait, &wait);
1462
1463         /* flush any remaining data in the buffer */
1464         if (flush)
1465                 kfifo_reset_out(&tport->write_fifo);
1466
1467         spin_unlock_irq(&tport->tp_lock);
1468
1469         mutex_lock(&port->serial->disc_mutex);
1470         /* wait for data to drain from the device */
1471         /* wait for empty tx register, plus 20 ms */
1472         timeout += jiffies;
1473         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1474         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1475         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1476         && !port->serial->disconnected) {
1477                 if (ti_get_lsr(tport))
1478                         break;
1479                 mutex_unlock(&port->serial->disc_mutex);
1480                 msleep_interruptible(20);
1481                 mutex_lock(&port->serial->disc_mutex);
1482         }
1483         mutex_unlock(&port->serial->disc_mutex);
1484 }
1485
1486
1487 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1488 {
1489         unsigned long flags;
1490
1491         spin_lock_irqsave(&tport->tp_lock, flags);
1492
1493         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1494                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1495
1496         spin_unlock_irqrestore(&tport->tp_lock, flags);
1497 }
1498
1499
1500 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1501 {
1502         struct urb *urb;
1503         int status = 0;
1504         unsigned long flags;
1505
1506         spin_lock_irqsave(&tport->tp_lock, flags);
1507
1508         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1509                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1510                 urb = tport->tp_port->read_urb;
1511                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1512                 urb->context = tport;
1513                 status = usb_submit_urb(urb, GFP_KERNEL);
1514         } else  {
1515                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1516                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1517         }
1518
1519         return status;
1520 }
1521
1522
1523 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1524         __u16 moduleid, __u16 value, __u8 *data, int size)
1525 {
1526         int status;
1527
1528         status = usb_control_msg(tdev->td_serial->dev,
1529                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1530                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1531                 value, moduleid, data, size, 1000);
1532
1533         if (status == size)
1534                 status = 0;
1535
1536         if (status > 0)
1537                 status = -ECOMM;
1538
1539         return status;
1540 }
1541
1542
1543 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1544         __u16 moduleid, __u16 value, __u8 *data, int size)
1545 {
1546         int status;
1547
1548         status = usb_control_msg(tdev->td_serial->dev,
1549                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1550                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1551                 value, moduleid, data, size, 1000);
1552
1553         if (status == size)
1554                 status = 0;
1555
1556         if (status > 0)
1557                 status = -ECOMM;
1558
1559         return status;
1560 }
1561
1562
1563 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1564         __u8 mask, __u8 byte)
1565 {
1566         int status;
1567         unsigned int size;
1568         struct ti_write_data_bytes *data;
1569         struct device *dev = &tdev->td_serial->dev->dev;
1570
1571         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1572                                         __func__, addr, mask, byte);
1573
1574         size = sizeof(struct ti_write_data_bytes) + 2;
1575         data = kmalloc(size, GFP_KERNEL);
1576         if (!data) {
1577                 dev_err(dev, "%s - out of memory\n", __func__);
1578                 return -ENOMEM;
1579         }
1580
1581         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1582         data->bDataType = TI_RW_DATA_BYTE;
1583         data->bDataCounter = 1;
1584         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1585         data->wBaseAddrLo = cpu_to_be16(addr);
1586         data->bData[0] = mask;
1587         data->bData[1] = byte;
1588
1589         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1590                 (__u8 *)data, size);
1591
1592         if (status < 0)
1593                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1594
1595         kfree(data);
1596
1597         return status;
1598 }
1599
1600 static int ti_do_download(struct usb_device *dev, int pipe,
1601                                                 u8 *buffer, int size)
1602 {
1603         int pos;
1604         u8 cs = 0;
1605         int done;
1606         struct ti_firmware_header *header;
1607         int status = 0;
1608         int len;
1609
1610         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1611                 cs = (__u8)(cs + buffer[pos]);
1612
1613         header = (struct ti_firmware_header *)buffer;
1614         header->wLength = cpu_to_le16((__u16)(size
1615                                         - sizeof(struct ti_firmware_header)));
1616         header->bCheckSum = cs;
1617
1618         dbg("%s - downloading firmware", __func__);
1619         for (pos = 0; pos < size; pos += done) {
1620                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1621                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1622                                                                 &done, 1000);
1623                 if (status)
1624                         break;
1625         }
1626         return status;
1627 }
1628
1629 static int ti_download_firmware(struct ti_device *tdev)
1630 {
1631         int status;
1632         int buffer_size;
1633         __u8 *buffer;
1634         struct usb_device *dev = tdev->td_serial->dev;
1635         unsigned int pipe = usb_sndbulkpipe(dev,
1636                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1637         const struct firmware *fw_p;
1638         char buf[32];
1639
1640         /* try ID specific firmware first, then try generic firmware */
1641         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1642             dev->descriptor.idProduct);
1643         status = request_firmware(&fw_p, buf, &dev->dev);
1644
1645         if (status != 0) {
1646                 buf[0] = '\0';
1647                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1648                         switch (dev->descriptor.idProduct) {
1649                         case MTS_CDMA_PRODUCT_ID:
1650                                 strcpy(buf, "mts_cdma.fw");
1651                                 break;
1652                         case MTS_GSM_PRODUCT_ID:
1653                                 strcpy(buf, "mts_gsm.fw");
1654                                 break;
1655                         case MTS_EDGE_PRODUCT_ID:
1656                                 strcpy(buf, "mts_edge.fw");
1657                                 break;
1658                         case MTS_MT9234MU_PRODUCT_ID:
1659                                 strcpy(buf, "mts_mt9234mu.fw");
1660                                 break;
1661                         case MTS_MT9234ZBA_PRODUCT_ID:
1662                                 strcpy(buf, "mts_mt9234zba.fw");
1663                                 break;
1664                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1665                                 strcpy(buf, "mts_mt9234zba.fw");
1666                                 break;                  }
1667                 }
1668                 if (buf[0] == '\0') {
1669                         if (tdev->td_is_3410)
1670                                 strcpy(buf, "ti_3410.fw");
1671                         else
1672                                 strcpy(buf, "ti_5052.fw");
1673                 }
1674                 status = request_firmware(&fw_p, buf, &dev->dev);
1675         }
1676         if (status) {
1677                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1678                 return -ENOENT;
1679         }
1680         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1681                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1682                 release_firmware(fw_p);
1683                 return -ENOENT;
1684         }
1685
1686         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1687         buffer = kmalloc(buffer_size, GFP_KERNEL);
1688         if (buffer) {
1689                 memcpy(buffer, fw_p->data, fw_p->size);
1690                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1691                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1692                 kfree(buffer);
1693         } else {
1694                 dbg("%s ENOMEM\n", __func__);
1695                 status = -ENOMEM;
1696         }
1697         release_firmware(fw_p);
1698         if (status) {
1699                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1700                                                         __func__, status);
1701                 return status;
1702         }
1703
1704         dbg("%s - download successful", __func__);
1705
1706         return 0;
1707 }