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_write_wait;
  79         struct ti_device        *tp_tdev;
  80         struct usb_serial_port  *tp_port;
  81         spinlock_t              tp_lock;
  82         int                     tp_read_urb_state;
  83         int                     tp_write_urb_in_use;
  84         struct kfifo            write_fifo;
  85 };
  86
  87 struct ti_device {
  88         struct mutex            td_open_close_lock;
  89         int                     td_open_port_count;
  90         struct usb_serial       *td_serial;
  91         int                     td_is_3410;
  92         int                     td_urb_error;
  93 };
  94
  95
  96 /* Function Declarations */
  97
  98 static int ti_startup(struct usb_serial *serial);
  99 static void ti_release(struct usb_serial *serial);
 100 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 101 static void ti_close(struct usb_serial_port *port);
 102 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 103                 const unsigned char *data, int count);
 104 static int ti_write_room(struct tty_struct *tty);
 105 static int ti_chars_in_buffer(struct tty_struct *tty);
 106 static void ti_throttle(struct tty_struct *tty);
 107 static void ti_unthrottle(struct tty_struct *tty);
 108 static int ti_ioctl(struct tty_struct *tty,
 109                 unsigned int cmd, unsigned long arg);
 110 static int ti_get_icount(struct tty_struct *tty,
 111                 struct serial_icounter_struct *icount);
 112 static void ti_set_termios(struct tty_struct *tty,
 113                 struct usb_serial_port *port, struct ktermios *old_termios);
 114 static int ti_tiocmget(struct tty_struct *tty);
 115 static int ti_tiocmset(struct tty_struct *tty,
 116                 unsigned int set, unsigned int clear);
 117 static void ti_break(struct tty_struct *tty, int break_state);
 118 static void ti_interrupt_callback(struct urb *urb);
 119 static void ti_bulk_in_callback(struct urb *urb);
 120 static void ti_bulk_out_callback(struct urb *urb);
 121
 122 static void ti_recv(struct device *dev, struct tty_struct *tty,
 123         unsigned char *data, int length);
 124 static void ti_send(struct ti_port *tport);
 125 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 126 static int ti_get_lsr(struct ti_port *tport);
 127 static int ti_get_serial_info(struct ti_port *tport,
 128         struct serial_struct __user *ret_arg);
 129 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 130         struct serial_struct __user *new_arg);
 131 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 132
 133 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 134
 135 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 136 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 137
 138 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 139         __u16 moduleid, __u16 value, __u8 *data, int size);
 140 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 141         __u16 moduleid, __u16 value, __u8 *data, int size);
 142
 143 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 144         __u8 mask, __u8 byte);
 145
 146 static int ti_download_firmware(struct ti_device *tdev);
 147
 148
 149 /* Data */
 150
 151 /* module parameters */
 152 static int debug;
 153 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 154 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 155 static unsigned int vendor_3410_count;
 156 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 157 static unsigned int product_3410_count;
 158 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 159 static unsigned int vendor_5052_count;
 160 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 161 static unsigned int product_5052_count;
 162
 163 /* supported devices */
 164 /* the array dimension is the number of default entries plus */
 165 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 166 /* null entry */
 167 static struct usb_device_id ti_id_table_3410[16+TI_EXTRA_VID_PID_COUNT+1] = {
 168         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 169         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 170         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 172         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 173         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 174         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 175         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 178         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 179         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 180         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 181         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
 182         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_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[20+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(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 213         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 214         { }
 215 };
 216
 217 static struct usb_driver ti_usb_driver = {
 218         .name                   = "ti_usb_3410_5052",
 219         .probe                  = usb_serial_probe,
 220         .disconnect             = usb_serial_disconnect,
 221         .id_table               = ti_id_table_combined,
 222         .no_dynamic_id =        1,
 223 };
 224
 225 static struct usb_serial_driver ti_1port_device = {
 226         .driver = {
 227                 .owner          = THIS_MODULE,
 228                 .name           = "ti_usb_3410_5052_1",
 229         },
 230         .description            = "TI USB 3410 1 port adapter",
 231         .usb_driver             = &ti_usb_driver,
 232         .id_table               = ti_id_table_3410,
 233         .num_ports              = 1,
 234         .attach                 = ti_startup,
 235         .release                = ti_release,
 236         .open                   = ti_open,
 237         .close                  = ti_close,
 238         .write                  = ti_write,
 239         .write_room             = ti_write_room,
 240         .chars_in_buffer        = ti_chars_in_buffer,
 241         .throttle               = ti_throttle,
 242         .unthrottle             = ti_unthrottle,
 243         .ioctl                  = ti_ioctl,
 244         .set_termios            = ti_set_termios,
 245         .tiocmget               = ti_tiocmget,
 246         .tiocmset               = ti_tiocmset,
 247         .get_icount             = ti_get_icount,
 248         .break_ctl              = ti_break,
 249         .read_int_callback      = ti_interrupt_callback,
 250         .read_bulk_callback     = ti_bulk_in_callback,
 251         .write_bulk_callback    = ti_bulk_out_callback,
 252 };
 253
 254 static struct usb_serial_driver ti_2port_device = {
 255         .driver = {
 256                 .owner          = THIS_MODULE,
 257                 .name           = "ti_usb_3410_5052_2",
 258         },
 259         .description            = "TI USB 5052 2 port adapter",
 260         .usb_driver             = &ti_usb_driver,
 261         .id_table               = ti_id_table_5052,
 262         .num_ports              = 2,
 263         .attach                 = ti_startup,
 264         .release                = ti_release,
 265         .open                   = ti_open,
 266         .close                  = ti_close,
 267         .write                  = ti_write,
 268         .write_room             = ti_write_room,
 269         .chars_in_buffer        = ti_chars_in_buffer,
 270         .throttle               = ti_throttle,
 271         .unthrottle             = ti_unthrottle,
 272         .ioctl                  = ti_ioctl,
 273         .set_termios            = ti_set_termios,
 274         .tiocmget               = ti_tiocmget,
 275         .tiocmset               = ti_tiocmset,
 276         .get_icount             = ti_get_icount,
 277         .break_ctl              = ti_break,
 278         .read_int_callback      = ti_interrupt_callback,
 279         .read_bulk_callback     = ti_bulk_in_callback,
 280         .write_bulk_callback    = ti_bulk_out_callback,
 281 };
 282
 283
 284 /* Module */
 285
 286 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 287 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 288 MODULE_VERSION(TI_DRIVER_VERSION);
 289 MODULE_LICENSE("GPL");
 290
 291 MODULE_FIRMWARE("ti_3410.fw");
 292 MODULE_FIRMWARE("ti_5052.fw");
 293 MODULE_FIRMWARE("mts_cdma.fw");
 294 MODULE_FIRMWARE("mts_gsm.fw");
 295 MODULE_FIRMWARE("mts_edge.fw");
 296 MODULE_FIRMWARE("mts_mt9234mu.fw");
 297 MODULE_FIRMWARE("mts_mt9234zba.fw");
 298
 299 module_param(debug, bool, S_IRUGO | S_IWUSR);
 300 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 301
 302 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 303 MODULE_PARM_DESC(closing_wait,
 304     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 305
 306 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 307 MODULE_PARM_DESC(vendor_3410,
 308                 "Vendor ids for 3410 based devices, 1-5 short integers");
 309 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 310 MODULE_PARM_DESC(product_3410,
 311                 "Product ids for 3410 based devices, 1-5 short integers");
 312 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 313 MODULE_PARM_DESC(vendor_5052,
 314                 "Vendor ids for 5052 based devices, 1-5 short integers");
 315 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 316 MODULE_PARM_DESC(product_5052,
 317                 "Product ids for 5052 based devices, 1-5 short integers");
 318
 319 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 320
 321
 322 /* Functions */
 323
 324 static int __init ti_init(void)
 325 {
 326         int i, j, c;
 327         int ret;
 328
 329         /* insert extra vendor and product ids */
 330         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 331         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 332         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 333                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 334                 ti_id_table_3410[j].idProduct = product_3410[i];
 335                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 336                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 337                 ti_id_table_combined[c].idProduct = product_3410[i];
 338                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 339         }
 340         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 341         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 342                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 343                 ti_id_table_5052[j].idProduct = product_5052[i];
 344                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 345                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 346                 ti_id_table_combined[c].idProduct = product_5052[i];
 347                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 348         }
 349
 350         ret = usb_serial_register(&ti_1port_device);
 351         if (ret)
 352                 goto failed_1port;
 353         ret = usb_serial_register(&ti_2port_device);
 354         if (ret)
 355                 goto failed_2port;
 356
 357         ret = usb_register(&ti_usb_driver);
 358         if (ret)
 359                 goto failed_usb;
 360
 361         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 362                TI_DRIVER_DESC "\n");
 363
 364         return 0;
 365
 366 failed_usb:
 367         usb_serial_deregister(&ti_2port_device);
 368 failed_2port:
 369         usb_serial_deregister(&ti_1port_device);
 370 failed_1port:
 371         return ret;
 372 }
 373
 374
 375 static void __exit ti_exit(void)
 376 {
 377         usb_deregister(&ti_usb_driver);
 378         usb_serial_deregister(&ti_1port_device);
 379         usb_serial_deregister(&ti_2port_device);
 380 }
 381
 382
 383 module_init(ti_init);
 384 module_exit(ti_exit);
 385
 386
 387 static int ti_startup(struct usb_serial *serial)
 388 {
 389         struct ti_device *tdev;
 390         struct ti_port *tport;
 391         struct usb_device *dev = serial->dev;
 392         int status;
 393         int i;
 394
 395
 396         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 397             __func__, le16_to_cpu(dev->descriptor.idProduct),
 398             dev->descriptor.bNumConfigurations,
 399             dev->actconfig->desc.bConfigurationValue);
 400
 401         /* create device structure */
 402         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 403         if (tdev == NULL) {
 404                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 405                 return -ENOMEM;
 406         }
 407         mutex_init(&tdev->td_open_close_lock);
 408         tdev->td_serial = serial;
 409         usb_set_serial_data(serial, tdev);
 410
 411         /* determine device type */
 412         if (serial->type == &ti_1port_device)
 413                 tdev->td_is_3410 = 1;
 414         dbg("%s - device type is %s", __func__,
 415                                 tdev->td_is_3410 ? "3410" : "5052");
 416
 417         /* if we have only 1 configuration, download firmware */
 418         if (dev->descriptor.bNumConfigurations == 1) {
 419                 if ((status = ti_download_firmware(tdev)) != 0)
 420                         goto free_tdev;
 421
 422                 /* 3410 must be reset, 5052 resets itself */
 423                 if (tdev->td_is_3410) {
 424                         msleep_interruptible(100);
 425                         usb_reset_device(dev);
 426                 }
 427
 428                 status = -ENODEV;
 429                 goto free_tdev;
 430         }
 431
 432         /* the second configuration must be set */
 433         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 434                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 435                 status = status ? status : -ENODEV;
 436                 goto free_tdev;
 437         }
 438
 439         /* set up port structures */
 440         for (i = 0; i < serial->num_ports; ++i) {
 441                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 442                 if (tport == NULL) {
 443                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 444                         status = -ENOMEM;
 445                         goto free_tports;
 446                 }
 447                 spin_lock_init(&tport->tp_lock);
 448                 tport->tp_uart_base_addr = (i == 0 ?
 449                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 450                 tport->tp_closing_wait = closing_wait;
 451                 init_waitqueue_head(&tport->tp_write_wait);
 452                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 453                                                                 GFP_KERNEL)) {
 454                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 455                         kfree(tport);
 456                         status = -ENOMEM;
 457                         goto free_tports;
 458                 }
 459                 tport->tp_port = serial->port[i];
 460                 tport->tp_tdev = tdev;
 461                 usb_set_serial_port_data(serial->port[i], tport);
 462                 tport->tp_uart_mode = 0;        /* default is RS232 */
 463         }
 464
 465         return 0;
 466
 467 free_tports:
 468         for (--i; i >= 0; --i) {
 469                 tport = usb_get_serial_port_data(serial->port[i]);
 470                 kfifo_free(&tport->write_fifo);
 471                 kfree(tport);
 472                 usb_set_serial_port_data(serial->port[i], NULL);
 473         }
 474 free_tdev:
 475         kfree(tdev);
 476         usb_set_serial_data(serial, NULL);
 477         return status;
 478 }
 479
 480
 481 static void ti_release(struct usb_serial *serial)
 482 {
 483         int i;
 484         struct ti_device *tdev = usb_get_serial_data(serial);
 485         struct ti_port *tport;
 486
 487         dbg("%s", __func__);
 488
 489         for (i = 0; i < serial->num_ports; ++i) {
 490                 tport = usb_get_serial_port_data(serial->port[i]);
 491                 if (tport) {
 492                         kfifo_free(&tport->write_fifo);
 493                         kfree(tport);
 494                 }
 495         }
 496
 497         kfree(tdev);
 498 }
 499
 500
 501 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 502 {
 503         struct ti_port *tport = usb_get_serial_port_data(port);
 504         struct ti_device *tdev;
 505         struct usb_device *dev;
 506         struct urb *urb;
 507         int port_number;
 508         int status;
 509         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 510                              TI_PIPE_TIMEOUT_ENABLE |
 511                              (TI_TRANSFER_TIMEOUT << 2));
 512
 513         dbg("%s - port %d", __func__, port->number);
 514
 515         if (tport == NULL)
 516                 return -ENODEV;
 517
 518         dev = port->serial->dev;
 519         tdev = tport->tp_tdev;
 520
 521         /* only one open on any port on a device at a time */
 522         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 523                 return -ERESTARTSYS;
 524
 525         port_number = port->number - port->serial->minor;
 526
 527         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 528
 529         tport->tp_msr = 0;
 530         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 531
 532         /* start interrupt urb the first time a port is opened on this device */
 533         if (tdev->td_open_port_count == 0) {
 534                 dbg("%s - start interrupt in urb", __func__);
 535                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 536                 if (!urb) {
 537                         dev_err(&port->dev, "%s - no interrupt urb\n",
 538                                                                 __func__);
 539                         status = -EINVAL;
 540                         goto release_lock;
 541                 }
 542                 urb->complete = ti_interrupt_callback;
 543                 urb->context = tdev;
 544                 urb->dev = dev;
 545                 status = usb_submit_urb(urb, GFP_KERNEL);
 546                 if (status) {
 547                         dev_err(&port->dev,
 548                                 "%s - submit interrupt urb failed, %d\n",
 549                                         __func__, status);
 550                         goto release_lock;
 551                 }
 552         }
 553
 554         if (tty)
 555                 ti_set_termios(tty, port, tty->termios);
 556
 557         dbg("%s - sending TI_OPEN_PORT", __func__);
 558         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 559                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 560         if (status) {
 561                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 562                                                         __func__, status);
 563                 goto unlink_int_urb;
 564         }
 565
 566         dbg("%s - sending TI_START_PORT", __func__);
 567         status = ti_command_out_sync(tdev, TI_START_PORT,
 568                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 569         if (status) {
 570                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 571                                                         __func__, status);
 572                 goto unlink_int_urb;
 573         }
 574
 575         dbg("%s - sending TI_PURGE_PORT", __func__);
 576         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 577                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 578         if (status) {
 579                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 580                                                         __func__, status);
 581                 goto unlink_int_urb;
 582         }
 583         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 584                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 585         if (status) {
 586                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 587                                                         __func__, status);
 588                 goto unlink_int_urb;
 589         }
 590
 591         /* reset the data toggle on the bulk endpoints to work around bug in
 592          * host controllers where things get out of sync some times */
 593         usb_clear_halt(dev, port->write_urb->pipe);
 594         usb_clear_halt(dev, port->read_urb->pipe);
 595
 596         if (tty)
 597                 ti_set_termios(tty, port, tty->termios);
 598
 599         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 600         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 601                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 602         if (status) {
 603                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 604                                                         __func__, status);
 605                 goto unlink_int_urb;
 606         }
 607
 608         dbg("%s - sending TI_START_PORT (2)", __func__);
 609         status = ti_command_out_sync(tdev, TI_START_PORT,
 610                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 611         if (status) {
 612                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 613                                                         __func__, status);
 614                 goto unlink_int_urb;
 615         }
 616
 617         /* start read urb */
 618         dbg("%s - start read urb", __func__);
 619         urb = port->read_urb;
 620         if (!urb) {
 621                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 622                 status = -EINVAL;
 623                 goto unlink_int_urb;
 624         }
 625         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 626         urb->complete = ti_bulk_in_callback;
 627         urb->context = tport;
 628         urb->dev = dev;
 629         status = usb_submit_urb(urb, GFP_KERNEL);
 630         if (status) {
 631                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 632                                                         __func__, status);
 633                 goto unlink_int_urb;
 634         }
 635
 636         tport->tp_is_open = 1;
 637         ++tdev->td_open_port_count;
 638
 639         goto release_lock;
 640
 641 unlink_int_urb:
 642         if (tdev->td_open_port_count == 0)
 643                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 644 release_lock:
 645         mutex_unlock(&tdev->td_open_close_lock);
 646         dbg("%s - exit %d", __func__, status);
 647         return status;
 648 }
 649
 650
 651 static void ti_close(struct usb_serial_port *port)
 652 {
 653         struct ti_device *tdev;
 654         struct ti_port *tport;
 655         int port_number;
 656         int status;
 657         int do_unlock;
 658
 659         dbg("%s - port %d", __func__, port->number);
 660
 661         tdev = usb_get_serial_data(port->serial);
 662         tport = usb_get_serial_port_data(port);
 663         if (tdev == NULL || tport == NULL)
 664                 return;
 665
 666         tport->tp_is_open = 0;
 667
 668         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 669
 670         usb_kill_urb(port->read_urb);
 671         usb_kill_urb(port->write_urb);
 672         tport->tp_write_urb_in_use = 0;
 673
 674         port_number = port->number - port->serial->minor;
 675
 676         dbg("%s - sending TI_CLOSE_PORT", __func__);
 677         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 678                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 679         if (status)
 680                 dev_err(&port->dev,
 681                         "%s - cannot send close port command, %d\n"
 682                                                         , __func__, status);
 683
 684         /* if mutex_lock is interrupted, continue anyway */
 685         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 686         --tport->tp_tdev->td_open_port_count;
 687         if (tport->tp_tdev->td_open_port_count <= 0) {
 688                 /* last port is closed, shut down interrupt urb */
 689                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 690                 tport->tp_tdev->td_open_port_count = 0;
 691         }
 692         if (do_unlock)
 693                 mutex_unlock(&tdev->td_open_close_lock);
 694
 695         dbg("%s - exit", __func__);
 696 }
 697
 698
 699 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 700                         const unsigned char *data, int count)
 701 {
 702         struct ti_port *tport = usb_get_serial_port_data(port);
 703
 704         dbg("%s - port %d", __func__, port->number);
 705
 706         if (count == 0) {
 707                 dbg("%s - write request of 0 bytes", __func__);
 708                 return 0;
 709         }
 710
 711         if (tport == NULL || !tport->tp_is_open)
 712                 return -ENODEV;
 713
 714         count = kfifo_in_locked(&tport->write_fifo, data, count,
 715                                                         &tport->tp_lock);
 716         ti_send(tport);
 717
 718         return count;
 719 }
 720
 721
 722 static int ti_write_room(struct tty_struct *tty)
 723 {
 724         struct usb_serial_port *port = tty->driver_data;
 725         struct ti_port *tport = usb_get_serial_port_data(port);
 726         int room = 0;
 727         unsigned long flags;
 728
 729         dbg("%s - port %d", __func__, port->number);
 730
 731         if (tport == NULL)
 732                 return 0;
 733
 734         spin_lock_irqsave(&tport->tp_lock, flags);
 735         room = kfifo_avail(&tport->write_fifo);
 736         spin_unlock_irqrestore(&tport->tp_lock, flags);
 737
 738         dbg("%s - returns %d", __func__, room);
 739         return room;
 740 }
 741
 742
 743 static int ti_chars_in_buffer(struct tty_struct *tty)
 744 {
 745         struct usb_serial_port *port = tty->driver_data;
 746         struct ti_port *tport = usb_get_serial_port_data(port);
 747         int chars = 0;
 748         unsigned long flags;
 749
 750         dbg("%s - port %d", __func__, port->number);
 751
 752         if (tport == NULL)
 753                 return 0;
 754
 755         spin_lock_irqsave(&tport->tp_lock, flags);
 756         chars = kfifo_len(&tport->write_fifo);
 757         spin_unlock_irqrestore(&tport->tp_lock, flags);
 758
 759         dbg("%s - returns %d", __func__, chars);
 760         return chars;
 761 }
 762
 763
 764 static void ti_throttle(struct tty_struct *tty)
 765 {
 766         struct usb_serial_port *port = tty->driver_data;
 767         struct ti_port *tport = usb_get_serial_port_data(port);
 768
 769         dbg("%s - port %d", __func__, port->number);
 770
 771         if (tport == NULL)
 772                 return;
 773
 774         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 775                 ti_stop_read(tport, tty);
 776
 777 }
 778
 779
 780 static void ti_unthrottle(struct tty_struct *tty)
 781 {
 782         struct usb_serial_port *port = tty->driver_data;
 783         struct ti_port *tport = usb_get_serial_port_data(port);
 784         int status;
 785
 786         dbg("%s - port %d", __func__, port->number);
 787
 788         if (tport == NULL)
 789                 return;
 790
 791         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 792                 status = ti_restart_read(tport, tty);
 793                 if (status)
 794                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 795                                                         __func__, status);
 796         }
 797 }
 798
 799 static int ti_get_icount(struct tty_struct *tty,
 800                 struct serial_icounter_struct *icount)
 801 {
 802         struct usb_serial_port *port = tty->driver_data;
 803         struct ti_port *tport = usb_get_serial_port_data(port);
 804         struct async_icount cnow = tport->tp_icount;
 805
 806         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 807                 __func__, port->number,
 808                 cnow.rx, cnow.tx);
 809
 810         icount->cts = cnow.cts;
 811         icount->dsr = cnow.dsr;
 812         icount->rng = cnow.rng;
 813         icount->dcd = cnow.dcd;
 814         icount->rx = cnow.rx;
 815         icount->tx = cnow.tx;
 816         icount->frame = cnow.frame;
 817         icount->overrun = cnow.overrun;
 818         icount->parity = cnow.parity;
 819         icount->brk = cnow.brk;
 820         icount->buf_overrun = cnow.buf_overrun;
 821
 822         return 0;
 823 }
 824
 825 static int ti_ioctl(struct tty_struct *tty,
 826         unsigned int cmd, unsigned long arg)
 827 {
 828         struct usb_serial_port *port = tty->driver_data;
 829         struct ti_port *tport = usb_get_serial_port_data(port);
 830         struct async_icount cnow;
 831         struct async_icount cprev;
 832
 833         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 834
 835         if (tport == NULL)
 836                 return -ENODEV;
 837
 838         switch (cmd) {
 839         case TIOCGSERIAL:
 840                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 841                 return ti_get_serial_info(tport,
 842                                 (struct serial_struct __user *)arg);
 843         case TIOCSSERIAL:
 844                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 845                 return ti_set_serial_info(tty, tport,
 846                                 (struct serial_struct __user *)arg);
 847         case TIOCMIWAIT:
 848                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 849                 cprev = tport->tp_icount;
 850                 while (1) {
 851                         interruptible_sleep_on(&port->delta_msr_wait);
 852                         if (signal_pending(current))
 853                                 return -ERESTARTSYS;
 854
 855                         if (port->serial->disconnected)
 856                                 return -EIO;
 857
 858                         cnow = tport->tp_icount;
 859                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 860                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 861                                 return -EIO; /* no change => error */
 862                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 863                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 864                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 865                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 866                                 return 0;
 867                         cprev = cnow;
 868                 }
 869                 break;
 870         }
 871         return -ENOIOCTLCMD;
 872 }
 873
 874
 875 static void ti_set_termios(struct tty_struct *tty,
 876                 struct usb_serial_port *port, struct ktermios *old_termios)
 877 {
 878         struct ti_port *tport = usb_get_serial_port_data(port);
 879         struct ti_uart_config *config;
 880         tcflag_t cflag, iflag;
 881         int baud;
 882         int status;
 883         int port_number = port->number - port->serial->minor;
 884         unsigned int mcr;
 885
 886         dbg("%s - port %d", __func__, port->number);
 887
 888         cflag = tty->termios->c_cflag;
 889         iflag = tty->termios->c_iflag;
 890
 891         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 892         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 893                                 old_termios->c_cflag, old_termios->c_iflag);
 894
 895         if (tport == NULL)
 896                 return;
 897
 898         config = kmalloc(sizeof(*config), GFP_KERNEL);
 899         if (!config) {
 900                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 901                 return;
 902         }
 903
 904         config->wFlags = 0;
 905
 906         /* these flags must be set */
 907         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 908         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 909         config->bUartMode = (__u8)(tport->tp_uart_mode);
 910
 911         switch (cflag & CSIZE) {
 912         case CS5:
 913                     config->bDataBits = TI_UART_5_DATA_BITS;
 914                     break;
 915         case CS6:
 916                     config->bDataBits = TI_UART_6_DATA_BITS;
 917                     break;
 918         case CS7:
 919                     config->bDataBits = TI_UART_7_DATA_BITS;
 920                     break;
 921         default:
 922         case CS8:
 923                     config->bDataBits = TI_UART_8_DATA_BITS;
 924                     break;
 925         }
 926
 927         /* CMSPAR isn't supported by this driver */
 928         tty->termios->c_cflag &= ~CMSPAR;
 929
 930         if (cflag & PARENB) {
 931                 if (cflag & PARODD) {
 932                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 933                         config->bParity = TI_UART_ODD_PARITY;
 934                 } else {
 935                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 936                         config->bParity = TI_UART_EVEN_PARITY;
 937                 }
 938         } else {
 939                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 940                 config->bParity = TI_UART_NO_PARITY;
 941         }
 942
 943         if (cflag & CSTOPB)
 944                 config->bStopBits = TI_UART_2_STOP_BITS;
 945         else
 946                 config->bStopBits = TI_UART_1_STOP_BITS;
 947
 948         if (cflag & CRTSCTS) {
 949                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 950                 if ((cflag & CBAUD) != B0)
 951                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 952                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 953         } else {
 954                 tty->hw_stopped = 0;
 955                 ti_restart_read(tport, tty);
 956         }
 957
 958         if (I_IXOFF(tty) || I_IXON(tty)) {
 959                 config->cXon  = START_CHAR(tty);
 960                 config->cXoff = STOP_CHAR(tty);
 961
 962                 if (I_IXOFF(tty))
 963                         config->wFlags |= TI_UART_ENABLE_X_IN;
 964                 else
 965                         ti_restart_read(tport, tty);
 966
 967                 if (I_IXON(tty))
 968                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 969         }
 970
 971         baud = tty_get_baud_rate(tty);
 972         if (!baud)
 973                 baud = 9600;
 974         if (tport->tp_tdev->td_is_3410)
 975                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 976         else
 977                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 978
 979         /* FIXME: Should calculate resulting baud here and report it back */
 980         if ((cflag & CBAUD) != B0)
 981                 tty_encode_baud_rate(tty, baud, baud);
 982
 983         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 984         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 985
 986         cpu_to_be16s(&config->wBaudRate);
 987         cpu_to_be16s(&config->wFlags);
 988
 989         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 990                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 991                 sizeof(*config));
 992         if (status)
 993                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 994                                         __func__, port_number, status);
 995
 996         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 997         mcr = tport->tp_shadow_mcr;
 998         /* if baud rate is B0, clear RTS and DTR */
 999         if ((cflag & CBAUD) == B0)
1000                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1001         status = ti_set_mcr(tport, mcr);
1002         if (status)
1003                 dev_err(&port->dev,
1004                         "%s - cannot set modem control on port %d, %d\n",
1005                                                 __func__, port_number, status);
1006
1007         kfree(config);
1008 }
1009
1010
1011 static int ti_tiocmget(struct tty_struct *tty)
1012 {
1013         struct usb_serial_port *port = tty->driver_data;
1014         struct ti_port *tport = usb_get_serial_port_data(port);
1015         unsigned int result;
1016         unsigned int msr;
1017         unsigned int mcr;
1018         unsigned long flags;
1019
1020         dbg("%s - port %d", __func__, port->number);
1021
1022         if (tport == NULL)
1023                 return -ENODEV;
1024
1025         spin_lock_irqsave(&tport->tp_lock, flags);
1026         msr = tport->tp_msr;
1027         mcr = tport->tp_shadow_mcr;
1028         spin_unlock_irqrestore(&tport->tp_lock, flags);
1029
1030         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1031                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1032                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1033                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1034                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1035                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1036                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1037
1038         dbg("%s - 0x%04X", __func__, result);
1039
1040         return result;
1041 }
1042
1043
1044 static int ti_tiocmset(struct tty_struct *tty,
1045                                 unsigned int set, unsigned int clear)
1046 {
1047         struct usb_serial_port *port = tty->driver_data;
1048         struct ti_port *tport = usb_get_serial_port_data(port);
1049         unsigned int mcr;
1050         unsigned long flags;
1051
1052         dbg("%s - port %d", __func__, port->number);
1053
1054         if (tport == NULL)
1055                 return -ENODEV;
1056
1057         spin_lock_irqsave(&tport->tp_lock, flags);
1058         mcr = tport->tp_shadow_mcr;
1059
1060         if (set & TIOCM_RTS)
1061                 mcr |= TI_MCR_RTS;
1062         if (set & TIOCM_DTR)
1063                 mcr |= TI_MCR_DTR;
1064         if (set & TIOCM_LOOP)
1065                 mcr |= TI_MCR_LOOP;
1066
1067         if (clear & TIOCM_RTS)
1068                 mcr &= ~TI_MCR_RTS;
1069         if (clear & TIOCM_DTR)
1070                 mcr &= ~TI_MCR_DTR;
1071         if (clear & TIOCM_LOOP)
1072                 mcr &= ~TI_MCR_LOOP;
1073         spin_unlock_irqrestore(&tport->tp_lock, flags);
1074
1075         return ti_set_mcr(tport, mcr);
1076 }
1077
1078
1079 static void ti_break(struct tty_struct *tty, int break_state)
1080 {
1081         struct usb_serial_port *port = tty->driver_data;
1082         struct ti_port *tport = usb_get_serial_port_data(port);
1083         int status;
1084
1085         dbg("%s - state = %d", __func__, break_state);
1086
1087         if (tport == NULL)
1088                 return;
1089
1090         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1091
1092         status = ti_write_byte(tport->tp_tdev,
1093                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1094                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1095
1096         if (status)
1097                 dbg("%s - error setting break, %d", __func__, status);
1098 }
1099
1100
1101 static void ti_interrupt_callback(struct urb *urb)
1102 {
1103         struct ti_device *tdev = urb->context;
1104         struct usb_serial_port *port;
1105         struct usb_serial *serial = tdev->td_serial;
1106         struct ti_port *tport;
1107         struct device *dev = &urb->dev->dev;
1108         unsigned char *data = urb->transfer_buffer;
1109         int length = urb->actual_length;
1110         int port_number;
1111         int function;
1112         int status = urb->status;
1113         int retval;
1114         __u8 msr;
1115
1116         dbg("%s", __func__);
1117
1118         switch (status) {
1119         case 0:
1120                 break;
1121         case -ECONNRESET:
1122         case -ENOENT:
1123         case -ESHUTDOWN:
1124                 dbg("%s - urb shutting down, %d", __func__, status);
1125                 tdev->td_urb_error = 1;
1126                 return;
1127         default:
1128                 dev_err(dev, "%s - nonzero urb status, %d\n",
1129                         __func__, status);
1130                 tdev->td_urb_error = 1;
1131                 goto exit;
1132         }
1133
1134         if (length != 2) {
1135                 dbg("%s - bad packet size, %d", __func__, length);
1136                 goto exit;
1137         }
1138
1139         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1140                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1141                 goto exit;
1142         }
1143
1144         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1145         function = TI_GET_FUNC_FROM_CODE(data[0]);
1146
1147         dbg("%s - port_number %d, function %d, data 0x%02X",
1148                                 __func__, port_number, function, data[1]);
1149
1150         if (port_number >= serial->num_ports) {
1151                 dev_err(dev, "%s - bad port number, %d\n",
1152                                                 __func__, port_number);
1153                 goto exit;
1154         }
1155
1156         port = serial->port[port_number];
1157
1158         tport = usb_get_serial_port_data(port);
1159         if (!tport)
1160                 goto exit;
1161
1162         switch (function) {
1163         case TI_CODE_DATA_ERROR:
1164                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1165                                         __func__, port_number, data[1]);
1166                 break;
1167
1168         case TI_CODE_MODEM_STATUS:
1169                 msr = data[1];
1170                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1171                 ti_handle_new_msr(tport, msr);
1172                 break;
1173
1174         default:
1175                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1176                                                         __func__, data[1]);
1177                 break;
1178         }
1179
1180 exit:
1181         retval = usb_submit_urb(urb, GFP_ATOMIC);
1182         if (retval)
1183                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1184                         __func__, retval);
1185 }
1186
1187
1188 static void ti_bulk_in_callback(struct urb *urb)
1189 {
1190         struct ti_port *tport = urb->context;
1191         struct usb_serial_port *port = tport->tp_port;
1192         struct device *dev = &urb->dev->dev;
1193         int status = urb->status;
1194         int retval = 0;
1195         struct tty_struct *tty;
1196
1197         dbg("%s", __func__);
1198
1199         switch (status) {
1200         case 0:
1201                 break;
1202         case -ECONNRESET:
1203         case -ENOENT:
1204         case -ESHUTDOWN:
1205                 dbg("%s - urb shutting down, %d", __func__, status);
1206                 tport->tp_tdev->td_urb_error = 1;
1207                 wake_up_interruptible(&tport->tp_write_wait);
1208                 return;
1209         default:
1210                 dev_err(dev, "%s - nonzero urb status, %d\n",
1211                         __func__, status);
1212                 tport->tp_tdev->td_urb_error = 1;
1213                 wake_up_interruptible(&tport->tp_write_wait);
1214         }
1215
1216         if (status == -EPIPE)
1217                 goto exit;
1218
1219         if (status) {
1220                 dev_err(dev, "%s - stopping read!\n", __func__);
1221                 return;
1222         }
1223
1224         tty = tty_port_tty_get(&port->port);
1225         if (tty) {
1226                 if (urb->actual_length) {
1227                         usb_serial_debug_data(debug, dev, __func__,
1228                                 urb->actual_length, urb->transfer_buffer);
1229
1230                         if (!tport->tp_is_open)
1231                                 dbg("%s - port closed, dropping data",
1232                                         __func__);
1233                         else
1234                                 ti_recv(&urb->dev->dev, tty,
1235                                                 urb->transfer_buffer,
1236                                                 urb->actual_length);
1237                         spin_lock(&tport->tp_lock);
1238                         tport->tp_icount.rx += urb->actual_length;
1239                         spin_unlock(&tport->tp_lock);
1240                 }
1241                 tty_kref_put(tty);
1242         }
1243
1244 exit:
1245         /* continue to read unless stopping */
1246         spin_lock(&tport->tp_lock);
1247         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1248                 urb->dev = port->serial->dev;
1249                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1250         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1251                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1252         }
1253         spin_unlock(&tport->tp_lock);
1254         if (retval)
1255                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1256                         __func__, retval);
1257 }
1258
1259
1260 static void ti_bulk_out_callback(struct urb *urb)
1261 {
1262         struct ti_port *tport = urb->context;
1263         struct usb_serial_port *port = tport->tp_port;
1264         struct device *dev = &urb->dev->dev;
1265         int status = urb->status;
1266
1267         dbg("%s - port %d", __func__, port->number);
1268
1269         tport->tp_write_urb_in_use = 0;
1270
1271         switch (status) {
1272         case 0:
1273                 break;
1274         case -ECONNRESET:
1275         case -ENOENT:
1276         case -ESHUTDOWN:
1277                 dbg("%s - urb shutting down, %d", __func__, status);
1278                 tport->tp_tdev->td_urb_error = 1;
1279                 wake_up_interruptible(&tport->tp_write_wait);
1280                 return;
1281         default:
1282                 dev_err(dev, "%s - nonzero urb status, %d\n",
1283                         __func__, status);
1284                 tport->tp_tdev->td_urb_error = 1;
1285                 wake_up_interruptible(&tport->tp_write_wait);
1286         }
1287
1288         /* send any buffered data */
1289         ti_send(tport);
1290 }
1291
1292
1293 static void ti_recv(struct device *dev, struct tty_struct *tty,
1294         unsigned char *data, int length)
1295 {
1296         int cnt;
1297
1298         do {
1299                 cnt = tty_insert_flip_string(tty, data, length);
1300                 if (cnt < length) {
1301                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1302                                                 __func__, length - cnt);
1303                         if (cnt == 0)
1304                                 break;
1305                 }
1306                 tty_flip_buffer_push(tty);
1307                 data += cnt;
1308                 length -= cnt;
1309         } while (length > 0);
1310
1311 }
1312
1313
1314 static void ti_send(struct ti_port *tport)
1315 {
1316         int count, result;
1317         struct usb_serial_port *port = tport->tp_port;
1318         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1319         unsigned long flags;
1320
1321
1322         dbg("%s - port %d", __func__, port->number);
1323
1324         spin_lock_irqsave(&tport->tp_lock, flags);
1325
1326         if (tport->tp_write_urb_in_use)
1327                 goto unlock;
1328
1329         count = kfifo_out(&tport->write_fifo,
1330                                 port->write_urb->transfer_buffer,
1331                                 port->bulk_out_size);
1332
1333         if (count == 0)
1334                 goto unlock;
1335
1336         tport->tp_write_urb_in_use = 1;
1337
1338         spin_unlock_irqrestore(&tport->tp_lock, flags);
1339
1340         usb_serial_debug_data(debug, &port->dev, __func__, count,
1341                                         port->write_urb->transfer_buffer);
1342
1343         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1344                            usb_sndbulkpipe(port->serial->dev,
1345                                             port->bulk_out_endpointAddress),
1346                            port->write_urb->transfer_buffer, count,
1347                            ti_bulk_out_callback, tport);
1348
1349         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1350         if (result) {
1351                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1352                                                         __func__, result);
1353                 tport->tp_write_urb_in_use = 0;
1354                 /* TODO: reschedule ti_send */
1355         } else {
1356                 spin_lock_irqsave(&tport->tp_lock, flags);
1357                 tport->tp_icount.tx += count;
1358                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1359         }
1360
1361         /* more room in the buffer for new writes, wakeup */
1362         if (tty)
1363                 tty_wakeup(tty);
1364         tty_kref_put(tty);
1365         wake_up_interruptible(&tport->tp_write_wait);
1366         return;
1367 unlock:
1368         spin_unlock_irqrestore(&tport->tp_lock, flags);
1369         tty_kref_put(tty);
1370         return;
1371 }
1372
1373
1374 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1375 {
1376         unsigned long flags;
1377         int status;
1378
1379         status = ti_write_byte(tport->tp_tdev,
1380                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1381                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1382
1383         spin_lock_irqsave(&tport->tp_lock, flags);
1384         if (!status)
1385                 tport->tp_shadow_mcr = mcr;
1386         spin_unlock_irqrestore(&tport->tp_lock, flags);
1387
1388         return status;
1389 }
1390
1391
1392 static int ti_get_lsr(struct ti_port *tport)
1393 {
1394         int size, status;
1395         struct ti_device *tdev = tport->tp_tdev;
1396         struct usb_serial_port *port = tport->tp_port;
1397         int port_number = port->number - port->serial->minor;
1398         struct ti_port_status *data;
1399
1400         dbg("%s - port %d", __func__, port->number);
1401
1402         size = sizeof(struct ti_port_status);
1403         data = kmalloc(size, GFP_KERNEL);
1404         if (!data) {
1405                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1406                 return -ENOMEM;
1407         }
1408
1409         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1410                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1411         if (status) {
1412                 dev_err(&port->dev,
1413                         "%s - get port status command failed, %d\n",
1414                                                         __func__, status);
1415                 goto free_data;
1416         }
1417
1418         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1419
1420         tport->tp_lsr = data->bLSR;
1421
1422 free_data:
1423         kfree(data);
1424         return status;
1425 }
1426
1427
1428 static int ti_get_serial_info(struct ti_port *tport,
1429         struct serial_struct __user *ret_arg)
1430 {
1431         struct usb_serial_port *port = tport->tp_port;
1432         struct serial_struct ret_serial;
1433
1434         if (!ret_arg)
1435                 return -EFAULT;
1436
1437         memset(&ret_serial, 0, sizeof(ret_serial));
1438
1439         ret_serial.type = PORT_16550A;
1440         ret_serial.line = port->serial->minor;
1441         ret_serial.port = port->number - port->serial->minor;
1442         ret_serial.flags = tport->tp_flags;
1443         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1444         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1445         ret_serial.closing_wait = tport->tp_closing_wait;
1446
1447         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1448                 return -EFAULT;
1449
1450         return 0;
1451 }
1452
1453
1454 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1455         struct serial_struct __user *new_arg)
1456 {
1457         struct serial_struct new_serial;
1458
1459         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1460                 return -EFAULT;
1461
1462         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1463         tport->tp_closing_wait = new_serial.closing_wait;
1464
1465         return 0;
1466 }
1467
1468
1469 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1470 {
1471         struct async_icount *icount;
1472         struct tty_struct *tty;
1473         unsigned long flags;
1474
1475         dbg("%s - msr 0x%02X", __func__, msr);
1476
1477         if (msr & TI_MSR_DELTA_MASK) {
1478                 spin_lock_irqsave(&tport->tp_lock, flags);
1479                 icount = &tport->tp_icount;
1480                 if (msr & TI_MSR_DELTA_CTS)
1481                         icount->cts++;
1482                 if (msr & TI_MSR_DELTA_DSR)
1483                         icount->dsr++;
1484                 if (msr & TI_MSR_DELTA_CD)
1485                         icount->dcd++;
1486                 if (msr & TI_MSR_DELTA_RI)
1487                         icount->rng++;
1488                 wake_up_interruptible(&tport->tp_port->delta_msr_wait);
1489                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1490         }
1491
1492         tport->tp_msr = msr & TI_MSR_MASK;
1493
1494         /* handle CTS flow control */
1495         tty = tty_port_tty_get(&tport->tp_port->port);
1496         if (tty && C_CRTSCTS(tty)) {
1497                 if (msr & TI_MSR_CTS) {
1498                         tty->hw_stopped = 0;
1499                         tty_wakeup(tty);
1500                 } else {
1501                         tty->hw_stopped = 1;
1502                 }
1503         }
1504         tty_kref_put(tty);
1505 }
1506
1507
1508 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1509 {
1510         struct ti_device *tdev = tport->tp_tdev;
1511         struct usb_serial_port *port = tport->tp_port;
1512         wait_queue_t wait;
1513
1514         dbg("%s - port %d", __func__, port->number);
1515
1516         spin_lock_irq(&tport->tp_lock);
1517
1518         /* wait for data to drain from the buffer */
1519         tdev->td_urb_error = 0;
1520         init_waitqueue_entry(&wait, current);
1521         add_wait_queue(&tport->tp_write_wait, &wait);
1522         for (;;) {
1523                 set_current_state(TASK_INTERRUPTIBLE);
1524                 if (kfifo_len(&tport->write_fifo) == 0
1525                 || timeout == 0 || signal_pending(current)
1526                 || tdev->td_urb_error
1527                 || port->serial->disconnected)  /* disconnect */
1528                         break;
1529                 spin_unlock_irq(&tport->tp_lock);
1530                 timeout = schedule_timeout(timeout);
1531                 spin_lock_irq(&tport->tp_lock);
1532         }
1533         set_current_state(TASK_RUNNING);
1534         remove_wait_queue(&tport->tp_write_wait, &wait);
1535
1536         /* flush any remaining data in the buffer */
1537         if (flush)
1538                 kfifo_reset_out(&tport->write_fifo);
1539
1540         spin_unlock_irq(&tport->tp_lock);
1541
1542         mutex_lock(&port->serial->disc_mutex);
1543         /* wait for data to drain from the device */
1544         /* wait for empty tx register, plus 20 ms */
1545         timeout += jiffies;
1546         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1547         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1548         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1549         && !port->serial->disconnected) {
1550                 if (ti_get_lsr(tport))
1551                         break;
1552                 mutex_unlock(&port->serial->disc_mutex);
1553                 msleep_interruptible(20);
1554                 mutex_lock(&port->serial->disc_mutex);
1555         }
1556         mutex_unlock(&port->serial->disc_mutex);
1557 }
1558
1559
1560 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1561 {
1562         unsigned long flags;
1563
1564         spin_lock_irqsave(&tport->tp_lock, flags);
1565
1566         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1567                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1568
1569         spin_unlock_irqrestore(&tport->tp_lock, flags);
1570 }
1571
1572
1573 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1574 {
1575         struct urb *urb;
1576         int status = 0;
1577         unsigned long flags;
1578
1579         spin_lock_irqsave(&tport->tp_lock, flags);
1580
1581         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1582                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1583                 urb = tport->tp_port->read_urb;
1584                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1585                 urb->complete = ti_bulk_in_callback;
1586                 urb->context = tport;
1587                 urb->dev = tport->tp_port->serial->dev;
1588                 status = usb_submit_urb(urb, GFP_KERNEL);
1589         } else  {
1590                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1591                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1592         }
1593
1594         return status;
1595 }
1596
1597
1598 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1599         __u16 moduleid, __u16 value, __u8 *data, int size)
1600 {
1601         int status;
1602
1603         status = usb_control_msg(tdev->td_serial->dev,
1604                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1605                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1606                 value, moduleid, data, size, 1000);
1607
1608         if (status == size)
1609                 status = 0;
1610
1611         if (status > 0)
1612                 status = -ECOMM;
1613
1614         return status;
1615 }
1616
1617
1618 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1619         __u16 moduleid, __u16 value, __u8 *data, int size)
1620 {
1621         int status;
1622
1623         status = usb_control_msg(tdev->td_serial->dev,
1624                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1625                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1626                 value, moduleid, data, size, 1000);
1627
1628         if (status == size)
1629                 status = 0;
1630
1631         if (status > 0)
1632                 status = -ECOMM;
1633
1634         return status;
1635 }
1636
1637
1638 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1639         __u8 mask, __u8 byte)
1640 {
1641         int status;
1642         unsigned int size;
1643         struct ti_write_data_bytes *data;
1644         struct device *dev = &tdev->td_serial->dev->dev;
1645
1646         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1647                                         __func__, addr, mask, byte);
1648
1649         size = sizeof(struct ti_write_data_bytes) + 2;
1650         data = kmalloc(size, GFP_KERNEL);
1651         if (!data) {
1652                 dev_err(dev, "%s - out of memory\n", __func__);
1653                 return -ENOMEM;
1654         }
1655
1656         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1657         data->bDataType = TI_RW_DATA_BYTE;
1658         data->bDataCounter = 1;
1659         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1660         data->wBaseAddrLo = cpu_to_be16(addr);
1661         data->bData[0] = mask;
1662         data->bData[1] = byte;
1663
1664         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1665                 (__u8 *)data, size);
1666
1667         if (status < 0)
1668                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1669
1670         kfree(data);
1671
1672         return status;
1673 }
1674
1675 static int ti_do_download(struct usb_device *dev, int pipe,
1676                                                 u8 *buffer, int size)
1677 {
1678         int pos;
1679         u8 cs = 0;
1680         int done;
1681         struct ti_firmware_header *header;
1682         int status = 0;
1683         int len;
1684
1685         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1686                 cs = (__u8)(cs + buffer[pos]);
1687
1688         header = (struct ti_firmware_header *)buffer;
1689         header->wLength = cpu_to_le16((__u16)(size
1690                                         - sizeof(struct ti_firmware_header)));
1691         header->bCheckSum = cs;
1692
1693         dbg("%s - downloading firmware", __func__);
1694         for (pos = 0; pos < size; pos += done) {
1695                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1696                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1697                                                                 &done, 1000);
1698                 if (status)
1699                         break;
1700         }
1701         return status;
1702 }
1703
1704 static int ti_download_firmware(struct ti_device *tdev)
1705 {
1706         int status;
1707         int buffer_size;
1708         __u8 *buffer;
1709         struct usb_device *dev = tdev->td_serial->dev;
1710         unsigned int pipe = usb_sndbulkpipe(dev,
1711                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1712         const struct firmware *fw_p;
1713         char buf[32];
1714
1715         dbg("%s\n", __func__);
1716         /* try ID specific firmware first, then try generic firmware */
1717         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1718                         le16_to_cpu(dev->descriptor.idVendor),
1719                         le16_to_cpu(dev->descriptor.idProduct));
1720         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1721                 buf[0] = '\0';
1722                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1723                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1724                         case MTS_CDMA_PRODUCT_ID:
1725                                 strcpy(buf, "mts_cdma.fw");
1726                                 break;
1727                         case MTS_GSM_PRODUCT_ID:
1728                                 strcpy(buf, "mts_gsm.fw");
1729                                 break;
1730                         case MTS_EDGE_PRODUCT_ID:
1731                                 strcpy(buf, "mts_edge.fw");
1732                                 break;
1733                         case MTS_MT9234MU_PRODUCT_ID:
1734                                 strcpy(buf, "mts_mt9234mu.fw");
1735                                 break;
1736                         case MTS_MT9234ZBA_PRODUCT_ID:
1737                                 strcpy(buf, "mts_mt9234zba.fw");
1738                                 break;
1739                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1740                                 strcpy(buf, "mts_mt9234zba.fw");
1741                                 break;                  }
1742                 }
1743                 if (buf[0] == '\0') {
1744                         if (tdev->td_is_3410)
1745                                 strcpy(buf, "ti_3410.fw");
1746                         else
1747                                 strcpy(buf, "ti_5052.fw");
1748                 }
1749                 status = request_firmware(&fw_p, buf, &dev->dev);
1750         }
1751         if (status) {
1752                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1753                 return -ENOENT;
1754         }
1755         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1756                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1757                 release_firmware(fw_p);
1758                 return -ENOENT;
1759         }
1760
1761         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1762         buffer = kmalloc(buffer_size, GFP_KERNEL);
1763         if (buffer) {
1764                 memcpy(buffer, fw_p->data, fw_p->size);
1765                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1766                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1767                 kfree(buffer);
1768         } else {
1769                 dbg("%s ENOMEM\n", __func__);
1770                 status = -ENOMEM;
1771         }
1772         release_firmware(fw_p);
1773         if (status) {
1774                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1775                                                         __func__, status);
1776                 return status;
1777         }
1778
1779         dbg("%s - download successful", __func__);
1780
1781         return 0;
1782 }