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[13+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 };
 183
 184 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 189 };
 190
 191 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
 192         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 194         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 202         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 203         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 206         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 207         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 209         { }
 210 };
 211
 212 static struct usb_driver ti_usb_driver = {
 213         .name                   = "ti_usb_3410_5052",
 214         .probe                  = usb_serial_probe,
 215         .disconnect             = usb_serial_disconnect,
 216         .id_table               = ti_id_table_combined,
 217         .no_dynamic_id =        1,
 218 };
 219
 220 static struct usb_serial_driver ti_1port_device = {
 221         .driver = {
 222                 .owner          = THIS_MODULE,
 223                 .name           = "ti_usb_3410_5052_1",
 224         },
 225         .description            = "TI USB 3410 1 port adapter",
 226         .usb_driver             = &ti_usb_driver,
 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         .usb_driver             = &ti_usb_driver,
 256         .id_table               = ti_id_table_5052,
 257         .num_ports              = 2,
 258         .attach                 = ti_startup,
 259         .release                = ti_release,
 260         .open                   = ti_open,
 261         .close                  = ti_close,
 262         .write                  = ti_write,
 263         .write_room             = ti_write_room,
 264         .chars_in_buffer        = ti_chars_in_buffer,
 265         .throttle               = ti_throttle,
 266         .unthrottle             = ti_unthrottle,
 267         .ioctl                  = ti_ioctl,
 268         .set_termios            = ti_set_termios,
 269         .tiocmget               = ti_tiocmget,
 270         .tiocmset               = ti_tiocmset,
 271         .get_icount             = ti_get_icount,
 272         .break_ctl              = ti_break,
 273         .read_int_callback      = ti_interrupt_callback,
 274         .read_bulk_callback     = ti_bulk_in_callback,
 275         .write_bulk_callback    = ti_bulk_out_callback,
 276 };
 277
 278
 279 /* Module */
 280
 281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 283 MODULE_VERSION(TI_DRIVER_VERSION);
 284 MODULE_LICENSE("GPL");
 285
 286 MODULE_FIRMWARE("ti_3410.fw");
 287 MODULE_FIRMWARE("ti_5052.fw");
 288 MODULE_FIRMWARE("mts_cdma.fw");
 289 MODULE_FIRMWARE("mts_gsm.fw");
 290 MODULE_FIRMWARE("mts_edge.fw");
 291 MODULE_FIRMWARE("mts_mt9234mu.fw");
 292 MODULE_FIRMWARE("mts_mt9234zba.fw");
 293
 294 module_param(debug, bool, S_IRUGO | S_IWUSR);
 295 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 296
 297 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 298 MODULE_PARM_DESC(closing_wait,
 299     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 300
 301 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 302 MODULE_PARM_DESC(vendor_3410,
 303                 "Vendor ids for 3410 based devices, 1-5 short integers");
 304 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 305 MODULE_PARM_DESC(product_3410,
 306                 "Product ids for 3410 based devices, 1-5 short integers");
 307 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 308 MODULE_PARM_DESC(vendor_5052,
 309                 "Vendor ids for 5052 based devices, 1-5 short integers");
 310 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 311 MODULE_PARM_DESC(product_5052,
 312                 "Product ids for 5052 based devices, 1-5 short integers");
 313
 314 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 315
 316
 317 /* Functions */
 318
 319 static int __init ti_init(void)
 320 {
 321         int i, j, c;
 322         int ret;
 323
 324         /* insert extra vendor and product ids */
 325         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 326         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 327         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 328                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 329                 ti_id_table_3410[j].idProduct = product_3410[i];
 330                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 331                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 332                 ti_id_table_combined[c].idProduct = product_3410[i];
 333                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 334         }
 335         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 336         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 337                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 338                 ti_id_table_5052[j].idProduct = product_5052[i];
 339                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 340                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 341                 ti_id_table_combined[c].idProduct = product_5052[i];
 342                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 343         }
 344
 345         ret = usb_serial_register(&ti_1port_device);
 346         if (ret)
 347                 goto failed_1port;
 348         ret = usb_serial_register(&ti_2port_device);
 349         if (ret)
 350                 goto failed_2port;
 351
 352         ret = usb_register(&ti_usb_driver);
 353         if (ret)
 354                 goto failed_usb;
 355
 356         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 357                TI_DRIVER_DESC "\n");
 358
 359         return 0;
 360
 361 failed_usb:
 362         usb_serial_deregister(&ti_2port_device);
 363 failed_2port:
 364         usb_serial_deregister(&ti_1port_device);
 365 failed_1port:
 366         return ret;
 367 }
 368
 369
 370 static void __exit ti_exit(void)
 371 {
 372         usb_deregister(&ti_usb_driver);
 373         usb_serial_deregister(&ti_1port_device);
 374         usb_serial_deregister(&ti_2port_device);
 375 }
 376
 377
 378 module_init(ti_init);
 379 module_exit(ti_exit);
 380
 381
 382 static int ti_startup(struct usb_serial *serial)
 383 {
 384         struct ti_device *tdev;
 385         struct ti_port *tport;
 386         struct usb_device *dev = serial->dev;
 387         int status;
 388         int i;
 389
 390
 391         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 392             __func__, le16_to_cpu(dev->descriptor.idProduct),
 393             dev->descriptor.bNumConfigurations,
 394             dev->actconfig->desc.bConfigurationValue);
 395
 396         /* create device structure */
 397         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 398         if (tdev == NULL) {
 399                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 400                 return -ENOMEM;
 401         }
 402         mutex_init(&tdev->td_open_close_lock);
 403         tdev->td_serial = serial;
 404         usb_set_serial_data(serial, tdev);
 405
 406         /* determine device type */
 407         if (usb_match_id(serial->interface, ti_id_table_3410))
 408                 tdev->td_is_3410 = 1;
 409         dbg("%s - device type is %s", __func__,
 410                                 tdev->td_is_3410 ? "3410" : "5052");
 411
 412         /* if we have only 1 configuration, download firmware */
 413         if (dev->descriptor.bNumConfigurations == 1) {
 414                 if ((status = ti_download_firmware(tdev)) != 0)
 415                         goto free_tdev;
 416
 417                 /* 3410 must be reset, 5052 resets itself */
 418                 if (tdev->td_is_3410) {
 419                         msleep_interruptible(100);
 420                         usb_reset_device(dev);
 421                 }
 422
 423                 status = -ENODEV;
 424                 goto free_tdev;
 425         }
 426
 427         /* the second configuration must be set */
 428         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 429                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 430                 status = status ? status : -ENODEV;
 431                 goto free_tdev;
 432         }
 433
 434         /* set up port structures */
 435         for (i = 0; i < serial->num_ports; ++i) {
 436                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 437                 if (tport == NULL) {
 438                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 439                         status = -ENOMEM;
 440                         goto free_tports;
 441                 }
 442                 spin_lock_init(&tport->tp_lock);
 443                 tport->tp_uart_base_addr = (i == 0 ?
 444                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 445                 tport->tp_closing_wait = closing_wait;
 446                 init_waitqueue_head(&tport->tp_msr_wait);
 447                 init_waitqueue_head(&tport->tp_write_wait);
 448                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 449                                                                 GFP_KERNEL)) {
 450                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 451                         kfree(tport);
 452                         status = -ENOMEM;
 453                         goto free_tports;
 454                 }
 455                 tport->tp_port = serial->port[i];
 456                 tport->tp_tdev = tdev;
 457                 usb_set_serial_port_data(serial->port[i], tport);
 458                 tport->tp_uart_mode = 0;        /* default is RS232 */
 459         }
 460
 461         return 0;
 462
 463 free_tports:
 464         for (--i; i >= 0; --i) {
 465                 tport = usb_get_serial_port_data(serial->port[i]);
 466                 kfifo_free(&tport->write_fifo);
 467                 kfree(tport);
 468                 usb_set_serial_port_data(serial->port[i], NULL);
 469         }
 470 free_tdev:
 471         kfree(tdev);
 472         usb_set_serial_data(serial, NULL);
 473         return status;
 474 }
 475
 476
 477 static void ti_release(struct usb_serial *serial)
 478 {
 479         int i;
 480         struct ti_device *tdev = usb_get_serial_data(serial);
 481         struct ti_port *tport;
 482
 483         dbg("%s", __func__);
 484
 485         for (i = 0; i < serial->num_ports; ++i) {
 486                 tport = usb_get_serial_port_data(serial->port[i]);
 487                 if (tport) {
 488                         kfifo_free(&tport->write_fifo);
 489                         kfree(tport);
 490                 }
 491         }
 492
 493         kfree(tdev);
 494 }
 495
 496
 497 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 498 {
 499         struct ti_port *tport = usb_get_serial_port_data(port);
 500         struct ti_device *tdev;
 501         struct usb_device *dev;
 502         struct urb *urb;
 503         int port_number;
 504         int status;
 505         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 506                              TI_PIPE_TIMEOUT_ENABLE |
 507                              (TI_TRANSFER_TIMEOUT << 2));
 508
 509         dbg("%s - port %d", __func__, port->number);
 510
 511         if (tport == NULL)
 512                 return -ENODEV;
 513
 514         dev = port->serial->dev;
 515         tdev = tport->tp_tdev;
 516
 517         /* only one open on any port on a device at a time */
 518         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 519                 return -ERESTARTSYS;
 520
 521         port_number = port->number - port->serial->minor;
 522
 523         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 524
 525         tport->tp_msr = 0;
 526         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 527
 528         /* start interrupt urb the first time a port is opened on this device */
 529         if (tdev->td_open_port_count == 0) {
 530                 dbg("%s - start interrupt in urb", __func__);
 531                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 532                 if (!urb) {
 533                         dev_err(&port->dev, "%s - no interrupt urb\n",
 534                                                                 __func__);
 535                         status = -EINVAL;
 536                         goto release_lock;
 537                 }
 538                 urb->context = tdev;
 539                 status = usb_submit_urb(urb, GFP_KERNEL);
 540                 if (status) {
 541                         dev_err(&port->dev,
 542                                 "%s - submit interrupt urb failed, %d\n",
 543                                         __func__, status);
 544                         goto release_lock;
 545                 }
 546         }
 547
 548         if (tty)
 549                 ti_set_termios(tty, port, tty->termios);
 550
 551         dbg("%s - sending TI_OPEN_PORT", __func__);
 552         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 553                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 554         if (status) {
 555                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 556                                                         __func__, status);
 557                 goto unlink_int_urb;
 558         }
 559
 560         dbg("%s - sending TI_START_PORT", __func__);
 561         status = ti_command_out_sync(tdev, TI_START_PORT,
 562                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 563         if (status) {
 564                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 565                                                         __func__, status);
 566                 goto unlink_int_urb;
 567         }
 568
 569         dbg("%s - sending TI_PURGE_PORT", __func__);
 570         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 571                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 572         if (status) {
 573                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 574                                                         __func__, status);
 575                 goto unlink_int_urb;
 576         }
 577         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 578                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 579         if (status) {
 580                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 581                                                         __func__, status);
 582                 goto unlink_int_urb;
 583         }
 584
 585         /* reset the data toggle on the bulk endpoints to work around bug in
 586          * host controllers where things get out of sync some times */
 587         usb_clear_halt(dev, port->write_urb->pipe);
 588         usb_clear_halt(dev, port->read_urb->pipe);
 589
 590         if (tty)
 591                 ti_set_termios(tty, port, tty->termios);
 592
 593         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 594         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 595                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 596         if (status) {
 597                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 598                                                         __func__, status);
 599                 goto unlink_int_urb;
 600         }
 601
 602         dbg("%s - sending TI_START_PORT (2)", __func__);
 603         status = ti_command_out_sync(tdev, TI_START_PORT,
 604                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 605         if (status) {
 606                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 607                                                         __func__, status);
 608                 goto unlink_int_urb;
 609         }
 610
 611         /* start read urb */
 612         dbg("%s - start read urb", __func__);
 613         urb = port->read_urb;
 614         if (!urb) {
 615                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 616                 status = -EINVAL;
 617                 goto unlink_int_urb;
 618         }
 619         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 620         urb->context = tport;
 621         status = usb_submit_urb(urb, GFP_KERNEL);
 622         if (status) {
 623                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 624                                                         __func__, status);
 625                 goto unlink_int_urb;
 626         }
 627
 628         tport->tp_is_open = 1;
 629         ++tdev->td_open_port_count;
 630
 631         goto release_lock;
 632
 633 unlink_int_urb:
 634         if (tdev->td_open_port_count == 0)
 635                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 636 release_lock:
 637         mutex_unlock(&tdev->td_open_close_lock);
 638         dbg("%s - exit %d", __func__, status);
 639         return status;
 640 }
 641
 642
 643 static void ti_close(struct usb_serial_port *port)
 644 {
 645         struct ti_device *tdev;
 646         struct ti_port *tport;
 647         int port_number;
 648         int status;
 649         int do_unlock;
 650
 651         dbg("%s - port %d", __func__, port->number);
 652
 653         tdev = usb_get_serial_data(port->serial);
 654         tport = usb_get_serial_port_data(port);
 655         if (tdev == NULL || tport == NULL)
 656                 return;
 657
 658         tport->tp_is_open = 0;
 659
 660         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 661
 662         usb_kill_urb(port->read_urb);
 663         usb_kill_urb(port->write_urb);
 664         tport->tp_write_urb_in_use = 0;
 665
 666         port_number = port->number - port->serial->minor;
 667
 668         dbg("%s - sending TI_CLOSE_PORT", __func__);
 669         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 670                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 671         if (status)
 672                 dev_err(&port->dev,
 673                         "%s - cannot send close port command, %d\n"
 674                                                         , __func__, status);
 675
 676         /* if mutex_lock is interrupted, continue anyway */
 677         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 678         --tport->tp_tdev->td_open_port_count;
 679         if (tport->tp_tdev->td_open_port_count <= 0) {
 680                 /* last port is closed, shut down interrupt urb */
 681                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 682                 tport->tp_tdev->td_open_port_count = 0;
 683         }
 684         if (do_unlock)
 685                 mutex_unlock(&tdev->td_open_close_lock);
 686
 687         dbg("%s - exit", __func__);
 688 }
 689
 690
 691 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 692                         const unsigned char *data, int count)
 693 {
 694         struct ti_port *tport = usb_get_serial_port_data(port);
 695
 696         dbg("%s - port %d", __func__, port->number);
 697
 698         if (count == 0) {
 699                 dbg("%s - write request of 0 bytes", __func__);
 700                 return 0;
 701         }
 702
 703         if (tport == NULL || !tport->tp_is_open)
 704                 return -ENODEV;
 705
 706         count = kfifo_in_locked(&tport->write_fifo, data, count,
 707                                                         &tport->tp_lock);
 708         ti_send(tport);
 709
 710         return count;
 711 }
 712
 713
 714 static int ti_write_room(struct tty_struct *tty)
 715 {
 716         struct usb_serial_port *port = tty->driver_data;
 717         struct ti_port *tport = usb_get_serial_port_data(port);
 718         int room = 0;
 719         unsigned long flags;
 720
 721         dbg("%s - port %d", __func__, port->number);
 722
 723         if (tport == NULL)
 724                 return 0;
 725
 726         spin_lock_irqsave(&tport->tp_lock, flags);
 727         room = kfifo_avail(&tport->write_fifo);
 728         spin_unlock_irqrestore(&tport->tp_lock, flags);
 729
 730         dbg("%s - returns %d", __func__, room);
 731         return room;
 732 }
 733
 734
 735 static int ti_chars_in_buffer(struct tty_struct *tty)
 736 {
 737         struct usb_serial_port *port = tty->driver_data;
 738         struct ti_port *tport = usb_get_serial_port_data(port);
 739         int chars = 0;
 740         unsigned long flags;
 741
 742         dbg("%s - port %d", __func__, port->number);
 743
 744         if (tport == NULL)
 745                 return 0;
 746
 747         spin_lock_irqsave(&tport->tp_lock, flags);
 748         chars = kfifo_len(&tport->write_fifo);
 749         spin_unlock_irqrestore(&tport->tp_lock, flags);
 750
 751         dbg("%s - returns %d", __func__, chars);
 752         return chars;
 753 }
 754
 755
 756 static void ti_throttle(struct tty_struct *tty)
 757 {
 758         struct usb_serial_port *port = tty->driver_data;
 759         struct ti_port *tport = usb_get_serial_port_data(port);
 760
 761         dbg("%s - port %d", __func__, port->number);
 762
 763         if (tport == NULL)
 764                 return;
 765
 766         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 767                 ti_stop_read(tport, tty);
 768
 769 }
 770
 771
 772 static void ti_unthrottle(struct tty_struct *tty)
 773 {
 774         struct usb_serial_port *port = tty->driver_data;
 775         struct ti_port *tport = usb_get_serial_port_data(port);
 776         int status;
 777
 778         dbg("%s - port %d", __func__, port->number);
 779
 780         if (tport == NULL)
 781                 return;
 782
 783         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 784                 status = ti_restart_read(tport, tty);
 785                 if (status)
 786                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 787                                                         __func__, status);
 788         }
 789 }
 790
 791 static int ti_get_icount(struct tty_struct *tty,
 792                 struct serial_icounter_struct *icount)
 793 {
 794         struct usb_serial_port *port = tty->driver_data;
 795         struct ti_port *tport = usb_get_serial_port_data(port);
 796         struct async_icount cnow = tport->tp_icount;
 797
 798         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 799                 __func__, port->number,
 800                 cnow.rx, cnow.tx);
 801
 802         icount->cts = cnow.cts;
 803         icount->dsr = cnow.dsr;
 804         icount->rng = cnow.rng;
 805         icount->dcd = cnow.dcd;
 806         icount->rx = cnow.rx;
 807         icount->tx = cnow.tx;
 808         icount->frame = cnow.frame;
 809         icount->overrun = cnow.overrun;
 810         icount->parity = cnow.parity;
 811         icount->brk = cnow.brk;
 812         icount->buf_overrun = cnow.buf_overrun;
 813
 814         return 0;
 815 }
 816
 817 static int ti_ioctl(struct tty_struct *tty,
 818         unsigned int cmd, unsigned long arg)
 819 {
 820         struct usb_serial_port *port = tty->driver_data;
 821         struct ti_port *tport = usb_get_serial_port_data(port);
 822         struct async_icount cnow;
 823         struct async_icount cprev;
 824
 825         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 826
 827         if (tport == NULL)
 828                 return -ENODEV;
 829
 830         switch (cmd) {
 831         case TIOCGSERIAL:
 832                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 833                 return ti_get_serial_info(tport,
 834                                 (struct serial_struct __user *)arg);
 835         case TIOCSSERIAL:
 836                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 837                 return ti_set_serial_info(tty, tport,
 838                                 (struct serial_struct __user *)arg);
 839         case TIOCMIWAIT:
 840                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 841                 cprev = tport->tp_icount;
 842                 while (1) {
 843                         interruptible_sleep_on(&tport->tp_msr_wait);
 844                         if (signal_pending(current))
 845                                 return -ERESTARTSYS;
 846                         cnow = tport->tp_icount;
 847                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 848                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 849                                 return -EIO; /* no change => error */
 850                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 851                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 852                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 853                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 854                                 return 0;
 855                         cprev = cnow;
 856                 }
 857                 break;
 858         }
 859         return -ENOIOCTLCMD;
 860 }
 861
 862
 863 static void ti_set_termios(struct tty_struct *tty,
 864                 struct usb_serial_port *port, struct ktermios *old_termios)
 865 {
 866         struct ti_port *tport = usb_get_serial_port_data(port);
 867         struct ti_uart_config *config;
 868         tcflag_t cflag, iflag;
 869         int baud;
 870         int status;
 871         int port_number = port->number - port->serial->minor;
 872         unsigned int mcr;
 873
 874         dbg("%s - port %d", __func__, port->number);
 875
 876         cflag = tty->termios->c_cflag;
 877         iflag = tty->termios->c_iflag;
 878
 879         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 880         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 881                                 old_termios->c_cflag, old_termios->c_iflag);
 882
 883         if (tport == NULL)
 884                 return;
 885
 886         config = kmalloc(sizeof(*config), GFP_KERNEL);
 887         if (!config) {
 888                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 889                 return;
 890         }
 891
 892         config->wFlags = 0;
 893
 894         /* these flags must be set */
 895         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 896         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 897         config->bUartMode = (__u8)(tport->tp_uart_mode);
 898
 899         switch (cflag & CSIZE) {
 900         case CS5:
 901                     config->bDataBits = TI_UART_5_DATA_BITS;
 902                     break;
 903         case CS6:
 904                     config->bDataBits = TI_UART_6_DATA_BITS;
 905                     break;
 906         case CS7:
 907                     config->bDataBits = TI_UART_7_DATA_BITS;
 908                     break;
 909         default:
 910         case CS8:
 911                     config->bDataBits = TI_UART_8_DATA_BITS;
 912                     break;
 913         }
 914
 915         /* CMSPAR isn't supported by this driver */
 916         tty->termios->c_cflag &= ~CMSPAR;
 917
 918         if (cflag & PARENB) {
 919                 if (cflag & PARODD) {
 920                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 921                         config->bParity = TI_UART_ODD_PARITY;
 922                 } else {
 923                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 924                         config->bParity = TI_UART_EVEN_PARITY;
 925                 }
 926         } else {
 927                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 928                 config->bParity = TI_UART_NO_PARITY;
 929         }
 930
 931         if (cflag & CSTOPB)
 932                 config->bStopBits = TI_UART_2_STOP_BITS;
 933         else
 934                 config->bStopBits = TI_UART_1_STOP_BITS;
 935
 936         if (cflag & CRTSCTS) {
 937                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 938                 if ((cflag & CBAUD) != B0)
 939                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 940                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 941         } else {
 942                 tty->hw_stopped = 0;
 943                 ti_restart_read(tport, tty);
 944         }
 945
 946         if (I_IXOFF(tty) || I_IXON(tty)) {
 947                 config->cXon  = START_CHAR(tty);
 948                 config->cXoff = STOP_CHAR(tty);
 949
 950                 if (I_IXOFF(tty))
 951                         config->wFlags |= TI_UART_ENABLE_X_IN;
 952                 else
 953                         ti_restart_read(tport, tty);
 954
 955                 if (I_IXON(tty))
 956                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 957         }
 958
 959         baud = tty_get_baud_rate(tty);
 960         if (!baud)
 961                 baud = 9600;
 962         if (tport->tp_tdev->td_is_3410)
 963                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 964         else
 965                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 966
 967         /* FIXME: Should calculate resulting baud here and report it back */
 968         if ((cflag & CBAUD) != B0)
 969                 tty_encode_baud_rate(tty, baud, baud);
 970
 971         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 972         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 973
 974         cpu_to_be16s(&config->wBaudRate);
 975         cpu_to_be16s(&config->wFlags);
 976
 977         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 978                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 979                 sizeof(*config));
 980         if (status)
 981                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 982                                         __func__, port_number, status);
 983
 984         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 985         mcr = tport->tp_shadow_mcr;
 986         /* if baud rate is B0, clear RTS and DTR */
 987         if ((cflag & CBAUD) == B0)
 988                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 989         status = ti_set_mcr(tport, mcr);
 990         if (status)
 991                 dev_err(&port->dev,
 992                         "%s - cannot set modem control on port %d, %d\n",
 993                                                 __func__, port_number, status);
 994
 995         kfree(config);
 996 }
 997
 998
 999 static int ti_tiocmget(struct tty_struct *tty)
1000 {
1001         struct usb_serial_port *port = tty->driver_data;
1002         struct ti_port *tport = usb_get_serial_port_data(port);
1003         unsigned int result;
1004         unsigned int msr;
1005         unsigned int mcr;
1006         unsigned long flags;
1007
1008         dbg("%s - port %d", __func__, port->number);
1009
1010         if (tport == NULL)
1011                 return -ENODEV;
1012
1013         spin_lock_irqsave(&tport->tp_lock, flags);
1014         msr = tport->tp_msr;
1015         mcr = tport->tp_shadow_mcr;
1016         spin_unlock_irqrestore(&tport->tp_lock, flags);
1017
1018         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1019                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1020                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1021                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1022                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1023                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1024                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1025
1026         dbg("%s - 0x%04X", __func__, result);
1027
1028         return result;
1029 }
1030
1031
1032 static int ti_tiocmset(struct tty_struct *tty,
1033                                 unsigned int set, unsigned int clear)
1034 {
1035         struct usb_serial_port *port = tty->driver_data;
1036         struct ti_port *tport = usb_get_serial_port_data(port);
1037         unsigned int mcr;
1038         unsigned long flags;
1039
1040         dbg("%s - port %d", __func__, port->number);
1041
1042         if (tport == NULL)
1043                 return -ENODEV;
1044
1045         spin_lock_irqsave(&tport->tp_lock, flags);
1046         mcr = tport->tp_shadow_mcr;
1047
1048         if (set & TIOCM_RTS)
1049                 mcr |= TI_MCR_RTS;
1050         if (set & TIOCM_DTR)
1051                 mcr |= TI_MCR_DTR;
1052         if (set & TIOCM_LOOP)
1053                 mcr |= TI_MCR_LOOP;
1054
1055         if (clear & TIOCM_RTS)
1056                 mcr &= ~TI_MCR_RTS;
1057         if (clear & TIOCM_DTR)
1058                 mcr &= ~TI_MCR_DTR;
1059         if (clear & TIOCM_LOOP)
1060                 mcr &= ~TI_MCR_LOOP;
1061         spin_unlock_irqrestore(&tport->tp_lock, flags);
1062
1063         return ti_set_mcr(tport, mcr);
1064 }
1065
1066
1067 static void ti_break(struct tty_struct *tty, int break_state)
1068 {
1069         struct usb_serial_port *port = tty->driver_data;
1070         struct ti_port *tport = usb_get_serial_port_data(port);
1071         int status;
1072
1073         dbg("%s - state = %d", __func__, break_state);
1074
1075         if (tport == NULL)
1076                 return;
1077
1078         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1079
1080         status = ti_write_byte(tport->tp_tdev,
1081                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1082                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1083
1084         if (status)
1085                 dbg("%s - error setting break, %d", __func__, status);
1086 }
1087
1088
1089 static void ti_interrupt_callback(struct urb *urb)
1090 {
1091         struct ti_device *tdev = urb->context;
1092         struct usb_serial_port *port;
1093         struct usb_serial *serial = tdev->td_serial;
1094         struct ti_port *tport;
1095         struct device *dev = &urb->dev->dev;
1096         unsigned char *data = urb->transfer_buffer;
1097         int length = urb->actual_length;
1098         int port_number;
1099         int function;
1100         int status = urb->status;
1101         int retval;
1102         __u8 msr;
1103
1104         dbg("%s", __func__);
1105
1106         switch (status) {
1107         case 0:
1108                 break;
1109         case -ECONNRESET:
1110         case -ENOENT:
1111         case -ESHUTDOWN:
1112                 dbg("%s - urb shutting down, %d", __func__, status);
1113                 tdev->td_urb_error = 1;
1114                 return;
1115         default:
1116                 dev_err(dev, "%s - nonzero urb status, %d\n",
1117                         __func__, status);
1118                 tdev->td_urb_error = 1;
1119                 goto exit;
1120         }
1121
1122         if (length != 2) {
1123                 dbg("%s - bad packet size, %d", __func__, length);
1124                 goto exit;
1125         }
1126
1127         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1128                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1129                 goto exit;
1130         }
1131
1132         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1133         function = TI_GET_FUNC_FROM_CODE(data[0]);
1134
1135         dbg("%s - port_number %d, function %d, data 0x%02X",
1136                                 __func__, port_number, function, data[1]);
1137
1138         if (port_number >= serial->num_ports) {
1139                 dev_err(dev, "%s - bad port number, %d\n",
1140                                                 __func__, port_number);
1141                 goto exit;
1142         }
1143
1144         port = serial->port[port_number];
1145
1146         tport = usb_get_serial_port_data(port);
1147         if (!tport)
1148                 goto exit;
1149
1150         switch (function) {
1151         case TI_CODE_DATA_ERROR:
1152                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1153                                         __func__, port_number, data[1]);
1154                 break;
1155
1156         case TI_CODE_MODEM_STATUS:
1157                 msr = data[1];
1158                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1159                 ti_handle_new_msr(tport, msr);
1160                 break;
1161
1162         default:
1163                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1164                                                         __func__, data[1]);
1165                 break;
1166         }
1167
1168 exit:
1169         retval = usb_submit_urb(urb, GFP_ATOMIC);
1170         if (retval)
1171                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1172                         __func__, retval);
1173 }
1174
1175
1176 static void ti_bulk_in_callback(struct urb *urb)
1177 {
1178         struct ti_port *tport = urb->context;
1179         struct usb_serial_port *port = tport->tp_port;
1180         struct device *dev = &urb->dev->dev;
1181         int status = urb->status;
1182         int retval = 0;
1183         struct tty_struct *tty;
1184
1185         dbg("%s", __func__);
1186
1187         switch (status) {
1188         case 0:
1189                 break;
1190         case -ECONNRESET:
1191         case -ENOENT:
1192         case -ESHUTDOWN:
1193                 dbg("%s - urb shutting down, %d", __func__, status);
1194                 tport->tp_tdev->td_urb_error = 1;
1195                 wake_up_interruptible(&tport->tp_write_wait);
1196                 return;
1197         default:
1198                 dev_err(dev, "%s - nonzero urb status, %d\n",
1199                         __func__, status);
1200                 tport->tp_tdev->td_urb_error = 1;
1201                 wake_up_interruptible(&tport->tp_write_wait);
1202         }
1203
1204         if (status == -EPIPE)
1205                 goto exit;
1206
1207         if (status) {
1208                 dev_err(dev, "%s - stopping read!\n", __func__);
1209                 return;
1210         }
1211
1212         tty = tty_port_tty_get(&port->port);
1213         if (tty) {
1214                 if (urb->actual_length) {
1215                         usb_serial_debug_data(debug, dev, __func__,
1216                                 urb->actual_length, urb->transfer_buffer);
1217
1218                         if (!tport->tp_is_open)
1219                                 dbg("%s - port closed, dropping data",
1220                                         __func__);
1221                         else
1222                                 ti_recv(&urb->dev->dev, tty,
1223                                                 urb->transfer_buffer,
1224                                                 urb->actual_length);
1225                         spin_lock(&tport->tp_lock);
1226                         tport->tp_icount.rx += urb->actual_length;
1227                         spin_unlock(&tport->tp_lock);
1228                 }
1229                 tty_kref_put(tty);
1230         }
1231
1232 exit:
1233         /* continue to read unless stopping */
1234         spin_lock(&tport->tp_lock);
1235         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1236                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1237         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1238                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1239
1240         spin_unlock(&tport->tp_lock);
1241         if (retval)
1242                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1243                         __func__, retval);
1244 }
1245
1246
1247 static void ti_bulk_out_callback(struct urb *urb)
1248 {
1249         struct ti_port *tport = urb->context;
1250         struct usb_serial_port *port = tport->tp_port;
1251         struct device *dev = &urb->dev->dev;
1252         int status = urb->status;
1253
1254         dbg("%s - port %d", __func__, port->number);
1255
1256         tport->tp_write_urb_in_use = 0;
1257
1258         switch (status) {
1259         case 0:
1260                 break;
1261         case -ECONNRESET:
1262         case -ENOENT:
1263         case -ESHUTDOWN:
1264                 dbg("%s - urb shutting down, %d", __func__, status);
1265                 tport->tp_tdev->td_urb_error = 1;
1266                 wake_up_interruptible(&tport->tp_write_wait);
1267                 return;
1268         default:
1269                 dev_err(dev, "%s - nonzero urb status, %d\n",
1270                         __func__, status);
1271                 tport->tp_tdev->td_urb_error = 1;
1272                 wake_up_interruptible(&tport->tp_write_wait);
1273         }
1274
1275         /* send any buffered data */
1276         ti_send(tport);
1277 }
1278
1279
1280 static void ti_recv(struct device *dev, struct tty_struct *tty,
1281         unsigned char *data, int length)
1282 {
1283         int cnt;
1284
1285         do {
1286                 cnt = tty_insert_flip_string(tty, data, length);
1287                 if (cnt < length) {
1288                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1289                                                 __func__, length - cnt);
1290                         if (cnt == 0)
1291                                 break;
1292                 }
1293                 tty_flip_buffer_push(tty);
1294                 data += cnt;
1295                 length -= cnt;
1296         } while (length > 0);
1297
1298 }
1299
1300
1301 static void ti_send(struct ti_port *tport)
1302 {
1303         int count, result;
1304         struct usb_serial_port *port = tport->tp_port;
1305         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1306         unsigned long flags;
1307
1308
1309         dbg("%s - port %d", __func__, port->number);
1310
1311         spin_lock_irqsave(&tport->tp_lock, flags);
1312
1313         if (tport->tp_write_urb_in_use)
1314                 goto unlock;
1315
1316         count = kfifo_out(&tport->write_fifo,
1317                                 port->write_urb->transfer_buffer,
1318                                 port->bulk_out_size);
1319
1320         if (count == 0)
1321                 goto unlock;
1322
1323         tport->tp_write_urb_in_use = 1;
1324
1325         spin_unlock_irqrestore(&tport->tp_lock, flags);
1326
1327         usb_serial_debug_data(debug, &port->dev, __func__, count,
1328                                         port->write_urb->transfer_buffer);
1329
1330         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1331                            usb_sndbulkpipe(port->serial->dev,
1332                                             port->bulk_out_endpointAddress),
1333                            port->write_urb->transfer_buffer, count,
1334                            ti_bulk_out_callback, tport);
1335
1336         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1337         if (result) {
1338                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1339                                                         __func__, result);
1340                 tport->tp_write_urb_in_use = 0;
1341                 /* TODO: reschedule ti_send */
1342         } else {
1343                 spin_lock_irqsave(&tport->tp_lock, flags);
1344                 tport->tp_icount.tx += count;
1345                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1346         }
1347
1348         /* more room in the buffer for new writes, wakeup */
1349         if (tty)
1350                 tty_wakeup(tty);
1351         tty_kref_put(tty);
1352         wake_up_interruptible(&tport->tp_write_wait);
1353         return;
1354 unlock:
1355         spin_unlock_irqrestore(&tport->tp_lock, flags);
1356         tty_kref_put(tty);
1357         return;
1358 }
1359
1360
1361 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1362 {
1363         unsigned long flags;
1364         int status;
1365
1366         status = ti_write_byte(tport->tp_tdev,
1367                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1368                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1369
1370         spin_lock_irqsave(&tport->tp_lock, flags);
1371         if (!status)
1372                 tport->tp_shadow_mcr = mcr;
1373         spin_unlock_irqrestore(&tport->tp_lock, flags);
1374
1375         return status;
1376 }
1377
1378
1379 static int ti_get_lsr(struct ti_port *tport)
1380 {
1381         int size, status;
1382         struct ti_device *tdev = tport->tp_tdev;
1383         struct usb_serial_port *port = tport->tp_port;
1384         int port_number = port->number - port->serial->minor;
1385         struct ti_port_status *data;
1386
1387         dbg("%s - port %d", __func__, port->number);
1388
1389         size = sizeof(struct ti_port_status);
1390         data = kmalloc(size, GFP_KERNEL);
1391         if (!data) {
1392                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1393                 return -ENOMEM;
1394         }
1395
1396         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1397                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1398         if (status) {
1399                 dev_err(&port->dev,
1400                         "%s - get port status command failed, %d\n",
1401                                                         __func__, status);
1402                 goto free_data;
1403         }
1404
1405         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1406
1407         tport->tp_lsr = data->bLSR;
1408
1409 free_data:
1410         kfree(data);
1411         return status;
1412 }
1413
1414
1415 static int ti_get_serial_info(struct ti_port *tport,
1416         struct serial_struct __user *ret_arg)
1417 {
1418         struct usb_serial_port *port = tport->tp_port;
1419         struct serial_struct ret_serial;
1420
1421         if (!ret_arg)
1422                 return -EFAULT;
1423
1424         memset(&ret_serial, 0, sizeof(ret_serial));
1425
1426         ret_serial.type = PORT_16550A;
1427         ret_serial.line = port->serial->minor;
1428         ret_serial.port = port->number - port->serial->minor;
1429         ret_serial.flags = tport->tp_flags;
1430         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1431         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1432         ret_serial.closing_wait = tport->tp_closing_wait;
1433
1434         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1435                 return -EFAULT;
1436
1437         return 0;
1438 }
1439
1440
1441 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1442         struct serial_struct __user *new_arg)
1443 {
1444         struct serial_struct new_serial;
1445
1446         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1447                 return -EFAULT;
1448
1449         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1450         tport->tp_closing_wait = new_serial.closing_wait;
1451
1452         return 0;
1453 }
1454
1455
1456 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1457 {
1458         struct async_icount *icount;
1459         struct tty_struct *tty;
1460         unsigned long flags;
1461
1462         dbg("%s - msr 0x%02X", __func__, msr);
1463
1464         if (msr & TI_MSR_DELTA_MASK) {
1465                 spin_lock_irqsave(&tport->tp_lock, flags);
1466                 icount = &tport->tp_icount;
1467                 if (msr & TI_MSR_DELTA_CTS)
1468                         icount->cts++;
1469                 if (msr & TI_MSR_DELTA_DSR)
1470                         icount->dsr++;
1471                 if (msr & TI_MSR_DELTA_CD)
1472                         icount->dcd++;
1473                 if (msr & TI_MSR_DELTA_RI)
1474                         icount->rng++;
1475                 wake_up_interruptible(&tport->tp_msr_wait);
1476                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1477         }
1478
1479         tport->tp_msr = msr & TI_MSR_MASK;
1480
1481         /* handle CTS flow control */
1482         tty = tty_port_tty_get(&tport->tp_port->port);
1483         if (tty && C_CRTSCTS(tty)) {
1484                 if (msr & TI_MSR_CTS) {
1485                         tty->hw_stopped = 0;
1486                         tty_wakeup(tty);
1487                 } else {
1488                         tty->hw_stopped = 1;
1489                 }
1490         }
1491         tty_kref_put(tty);
1492 }
1493
1494
1495 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1496 {
1497         struct ti_device *tdev = tport->tp_tdev;
1498         struct usb_serial_port *port = tport->tp_port;
1499         wait_queue_t wait;
1500
1501         dbg("%s - port %d", __func__, port->number);
1502
1503         spin_lock_irq(&tport->tp_lock);
1504
1505         /* wait for data to drain from the buffer */
1506         tdev->td_urb_error = 0;
1507         init_waitqueue_entry(&wait, current);
1508         add_wait_queue(&tport->tp_write_wait, &wait);
1509         for (;;) {
1510                 set_current_state(TASK_INTERRUPTIBLE);
1511                 if (kfifo_len(&tport->write_fifo) == 0
1512                 || timeout == 0 || signal_pending(current)
1513                 || tdev->td_urb_error
1514                 || port->serial->disconnected)  /* disconnect */
1515                         break;
1516                 spin_unlock_irq(&tport->tp_lock);
1517                 timeout = schedule_timeout(timeout);
1518                 spin_lock_irq(&tport->tp_lock);
1519         }
1520         set_current_state(TASK_RUNNING);
1521         remove_wait_queue(&tport->tp_write_wait, &wait);
1522
1523         /* flush any remaining data in the buffer */
1524         if (flush)
1525                 kfifo_reset_out(&tport->write_fifo);
1526
1527         spin_unlock_irq(&tport->tp_lock);
1528
1529         mutex_lock(&port->serial->disc_mutex);
1530         /* wait for data to drain from the device */
1531         /* wait for empty tx register, plus 20 ms */
1532         timeout += jiffies;
1533         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1534         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1535         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1536         && !port->serial->disconnected) {
1537                 if (ti_get_lsr(tport))
1538                         break;
1539                 mutex_unlock(&port->serial->disc_mutex);
1540                 msleep_interruptible(20);
1541                 mutex_lock(&port->serial->disc_mutex);
1542         }
1543         mutex_unlock(&port->serial->disc_mutex);
1544 }
1545
1546
1547 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1548 {
1549         unsigned long flags;
1550
1551         spin_lock_irqsave(&tport->tp_lock, flags);
1552
1553         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1554                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1555
1556         spin_unlock_irqrestore(&tport->tp_lock, flags);
1557 }
1558
1559
1560 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1561 {
1562         struct urb *urb;
1563         int status = 0;
1564         unsigned long flags;
1565
1566         spin_lock_irqsave(&tport->tp_lock, flags);
1567
1568         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1569                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1570                 urb = tport->tp_port->read_urb;
1571                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1572                 urb->context = tport;
1573                 status = usb_submit_urb(urb, GFP_KERNEL);
1574         } else  {
1575                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1576                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577         }
1578
1579         return status;
1580 }
1581
1582
1583 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1584         __u16 moduleid, __u16 value, __u8 *data, int size)
1585 {
1586         int status;
1587
1588         status = usb_control_msg(tdev->td_serial->dev,
1589                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1590                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1591                 value, moduleid, data, size, 1000);
1592
1593         if (status == size)
1594                 status = 0;
1595
1596         if (status > 0)
1597                 status = -ECOMM;
1598
1599         return status;
1600 }
1601
1602
1603 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1604         __u16 moduleid, __u16 value, __u8 *data, int size)
1605 {
1606         int status;
1607
1608         status = usb_control_msg(tdev->td_serial->dev,
1609                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1610                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1611                 value, moduleid, data, size, 1000);
1612
1613         if (status == size)
1614                 status = 0;
1615
1616         if (status > 0)
1617                 status = -ECOMM;
1618
1619         return status;
1620 }
1621
1622
1623 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1624         __u8 mask, __u8 byte)
1625 {
1626         int status;
1627         unsigned int size;
1628         struct ti_write_data_bytes *data;
1629         struct device *dev = &tdev->td_serial->dev->dev;
1630
1631         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1632                                         __func__, addr, mask, byte);
1633
1634         size = sizeof(struct ti_write_data_bytes) + 2;
1635         data = kmalloc(size, GFP_KERNEL);
1636         if (!data) {
1637                 dev_err(dev, "%s - out of memory\n", __func__);
1638                 return -ENOMEM;
1639         }
1640
1641         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1642         data->bDataType = TI_RW_DATA_BYTE;
1643         data->bDataCounter = 1;
1644         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1645         data->wBaseAddrLo = cpu_to_be16(addr);
1646         data->bData[0] = mask;
1647         data->bData[1] = byte;
1648
1649         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1650                 (__u8 *)data, size);
1651
1652         if (status < 0)
1653                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1654
1655         kfree(data);
1656
1657         return status;
1658 }
1659
1660 static int ti_do_download(struct usb_device *dev, int pipe,
1661                                                 u8 *buffer, int size)
1662 {
1663         int pos;
1664         u8 cs = 0;
1665         int done;
1666         struct ti_firmware_header *header;
1667         int status = 0;
1668         int len;
1669
1670         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1671                 cs = (__u8)(cs + buffer[pos]);
1672
1673         header = (struct ti_firmware_header *)buffer;
1674         header->wLength = cpu_to_le16((__u16)(size
1675                                         - sizeof(struct ti_firmware_header)));
1676         header->bCheckSum = cs;
1677
1678         dbg("%s - downloading firmware", __func__);
1679         for (pos = 0; pos < size; pos += done) {
1680                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1681                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1682                                                                 &done, 1000);
1683                 if (status)
1684                         break;
1685         }
1686         return status;
1687 }
1688
1689 static int ti_download_firmware(struct ti_device *tdev)
1690 {
1691         int status;
1692         int buffer_size;
1693         __u8 *buffer;
1694         struct usb_device *dev = tdev->td_serial->dev;
1695         unsigned int pipe = usb_sndbulkpipe(dev,
1696                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1697         const struct firmware *fw_p;
1698         char buf[32];
1699
1700         dbg("%s\n", __func__);
1701         /* try ID specific firmware first, then try generic firmware */
1702         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1703             dev->descriptor.idProduct);
1704         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1705                 buf[0] = '\0';
1706                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1707                         switch (dev->descriptor.idProduct) {
1708                         case MTS_CDMA_PRODUCT_ID:
1709                                 strcpy(buf, "mts_cdma.fw");
1710                                 break;
1711                         case MTS_GSM_PRODUCT_ID:
1712                                 strcpy(buf, "mts_gsm.fw");
1713                                 break;
1714                         case MTS_EDGE_PRODUCT_ID:
1715                                 strcpy(buf, "mts_edge.fw");
1716                                 break;
1717                         case MTS_MT9234MU_PRODUCT_ID:
1718                                 strcpy(buf, "mts_mt9234mu.fw");
1719                                 break;
1720                         case MTS_MT9234ZBA_PRODUCT_ID:
1721                                 strcpy(buf, "mts_mt9234zba.fw");
1722                                 break;
1723                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1724                                 strcpy(buf, "mts_mt9234zba.fw");
1725                                 break;                  }
1726                 }
1727                 if (buf[0] == '\0') {
1728                         if (tdev->td_is_3410)
1729                                 strcpy(buf, "ti_3410.fw");
1730                         else
1731                                 strcpy(buf, "ti_5052.fw");
1732                 }
1733                 status = request_firmware(&fw_p, buf, &dev->dev);
1734         }
1735         if (status) {
1736                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1737                 return -ENOENT;
1738         }
1739         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1740                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1741                 release_firmware(fw_p);
1742                 return -ENOENT;
1743         }
1744
1745         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1746         buffer = kmalloc(buffer_size, GFP_KERNEL);
1747         if (buffer) {
1748                 memcpy(buffer, fw_p->data, fw_p->size);
1749                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1750                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1751                 kfree(buffer);
1752         } else {
1753                 dbg("%s ENOMEM\n", __func__);
1754                 status = -ENOMEM;
1755         }
1756         release_firmware(fw_p);
1757         if (status) {
1758                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1759                                                         __func__, status);
1760                 return status;
1761         }
1762
1763         dbg("%s - download successful", __func__);
1764
1765         return 0;
1766 }