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_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  44 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  45
  46 #define TI_FIRMWARE_BUF_SIZE    16284
  47
  48 #define TI_WRITE_BUF_SIZE       1024
  49
  50 #define TI_TRANSFER_TIMEOUT     2
  51
  52 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  53
  54 /* supported setserial flags */
  55 #define TI_SET_SERIAL_FLAGS     0
  56
  57 /* read urb states */
  58 #define TI_READ_URB_RUNNING     0
  59 #define TI_READ_URB_STOPPING    1
  60 #define TI_READ_URB_STOPPED     2
  61
  62 #define TI_EXTRA_VID_PID_COUNT  5
  63
  64
  65 /* Structures */
  66
  67 struct ti_port {
  68         int                     tp_is_open;
  69         __u8                    tp_msr;
  70         __u8                    tp_lsr;
  71         __u8                    tp_shadow_mcr;
  72         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  73         unsigned int            tp_uart_base_addr;
  74         int                     tp_flags;
  75         int                     tp_closing_wait;/* in .01 secs */
  76         struct async_icount     tp_icount;
  77         wait_queue_head_t       tp_write_wait;
  78         struct ti_device        *tp_tdev;
  79         struct usb_serial_port  *tp_port;
  80         spinlock_t              tp_lock;
  81         int                     tp_read_urb_state;
  82         int                     tp_write_urb_in_use;
  83         struct kfifo            write_fifo;
  84 };
  85
  86 struct ti_device {
  87         struct mutex            td_open_close_lock;
  88         int                     td_open_port_count;
  89         struct usb_serial       *td_serial;
  90         int                     td_is_3410;
  91         int                     td_urb_error;
  92 };
  93
  94
  95 /* Function Declarations */
  96
  97 static int ti_startup(struct usb_serial *serial);
  98 static void ti_release(struct usb_serial *serial);
  99 static int ti_port_probe(struct usb_serial_port *port);
 100 static int ti_port_remove(struct usb_serial_port *port);
 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 usb_serial_port *port, unsigned char *data,
 124                 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 usb_serial_port *port, struct ti_device *tdev,
 145                          unsigned long addr, __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 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[15+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_PRODUCT_ID) },
 182         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 183 };
 184
 185 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 190 };
 191
 192 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 203         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 207         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 210         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 211         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 212         { }
 213 };
 214
 215 static struct usb_serial_driver ti_1port_device = {
 216         .driver = {
 217                 .owner          = THIS_MODULE,
 218                 .name           = "ti_usb_3410_5052_1",
 219         },
 220         .description            = "TI USB 3410 1 port adapter",
 221         .id_table               = ti_id_table_3410,
 222         .num_ports              = 1,
 223         .attach                 = ti_startup,
 224         .release                = ti_release,
 225         .port_probe             = ti_port_probe,
 226         .port_remove            = ti_port_remove,
 227         .open                   = ti_open,
 228         .close                  = ti_close,
 229         .write                  = ti_write,
 230         .write_room             = ti_write_room,
 231         .chars_in_buffer        = ti_chars_in_buffer,
 232         .throttle               = ti_throttle,
 233         .unthrottle             = ti_unthrottle,
 234         .ioctl                  = ti_ioctl,
 235         .set_termios            = ti_set_termios,
 236         .tiocmget               = ti_tiocmget,
 237         .tiocmset               = ti_tiocmset,
 238         .get_icount             = ti_get_icount,
 239         .break_ctl              = ti_break,
 240         .read_int_callback      = ti_interrupt_callback,
 241         .read_bulk_callback     = ti_bulk_in_callback,
 242         .write_bulk_callback    = ti_bulk_out_callback,
 243 };
 244
 245 static struct usb_serial_driver ti_2port_device = {
 246         .driver = {
 247                 .owner          = THIS_MODULE,
 248                 .name           = "ti_usb_3410_5052_2",
 249         },
 250         .description            = "TI USB 5052 2 port adapter",
 251         .id_table               = ti_id_table_5052,
 252         .num_ports              = 2,
 253         .attach                 = ti_startup,
 254         .release                = ti_release,
 255         .port_probe             = ti_port_probe,
 256         .port_remove            = ti_port_remove,
 257         .open                   = ti_open,
 258         .close                  = ti_close,
 259         .write                  = ti_write,
 260         .write_room             = ti_write_room,
 261         .chars_in_buffer        = ti_chars_in_buffer,
 262         .throttle               = ti_throttle,
 263         .unthrottle             = ti_unthrottle,
 264         .ioctl                  = ti_ioctl,
 265         .set_termios            = ti_set_termios,
 266         .tiocmget               = ti_tiocmget,
 267         .tiocmset               = ti_tiocmset,
 268         .get_icount             = ti_get_icount,
 269         .break_ctl              = ti_break,
 270         .read_int_callback      = ti_interrupt_callback,
 271         .read_bulk_callback     = ti_bulk_in_callback,
 272         .write_bulk_callback    = ti_bulk_out_callback,
 273 };
 274
 275 static struct usb_serial_driver * const serial_drivers[] = {
 276         &ti_1port_device, &ti_2port_device, NULL
 277 };
 278
 279 /* Module */
 280
 281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 283 MODULE_LICENSE("GPL");
 284
 285 MODULE_FIRMWARE("ti_3410.fw");
 286 MODULE_FIRMWARE("ti_5052.fw");
 287 MODULE_FIRMWARE("mts_cdma.fw");
 288 MODULE_FIRMWARE("mts_gsm.fw");
 289 MODULE_FIRMWARE("mts_edge.fw");
 290 MODULE_FIRMWARE("mts_mt9234mu.fw");
 291 MODULE_FIRMWARE("mts_mt9234zba.fw");
 292
 293 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 294 MODULE_PARM_DESC(closing_wait,
 295     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 296
 297 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 298 MODULE_PARM_DESC(vendor_3410,
 299                 "Vendor ids for 3410 based devices, 1-5 short integers");
 300 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 301 MODULE_PARM_DESC(product_3410,
 302                 "Product ids for 3410 based devices, 1-5 short integers");
 303 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 304 MODULE_PARM_DESC(vendor_5052,
 305                 "Vendor ids for 5052 based devices, 1-5 short integers");
 306 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 307 MODULE_PARM_DESC(product_5052,
 308                 "Product ids for 5052 based devices, 1-5 short integers");
 309
 310 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 311
 312
 313 /* Functions */
 314
 315 static int __init ti_init(void)
 316 {
 317         int i, j, c;
 318
 319         /* insert extra vendor and product ids */
 320         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 321         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 322         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 323                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 324                 ti_id_table_3410[j].idProduct = product_3410[i];
 325                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 326                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 327                 ti_id_table_combined[c].idProduct = product_3410[i];
 328                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 329         }
 330         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 331         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 332                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 333                 ti_id_table_5052[j].idProduct = product_5052[i];
 334                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 335                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 336                 ti_id_table_combined[c].idProduct = product_5052[i];
 337                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 338         }
 339
 340         return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 341 }
 342
 343 static void __exit ti_exit(void)
 344 {
 345         usb_serial_deregister_drivers(serial_drivers);
 346 }
 347
 348 module_init(ti_init);
 349 module_exit(ti_exit);
 350
 351
 352 static int ti_startup(struct usb_serial *serial)
 353 {
 354         struct ti_device *tdev;
 355         struct usb_device *dev = serial->dev;
 356         int status;
 357
 358         dev_dbg(&dev->dev,
 359                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 360                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 361                 dev->descriptor.bNumConfigurations,
 362                 dev->actconfig->desc.bConfigurationValue);
 363
 364         /* create device structure */
 365         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 366         if (tdev == NULL) {
 367                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 368                 return -ENOMEM;
 369         }
 370         mutex_init(&tdev->td_open_close_lock);
 371         tdev->td_serial = serial;
 372         usb_set_serial_data(serial, tdev);
 373
 374         /* determine device type */
 375         if (usb_match_id(serial->interface, ti_id_table_3410))
 376                 tdev->td_is_3410 = 1;
 377         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 378                 tdev->td_is_3410 ? "3410" : "5052");
 379
 380         /* if we have only 1 configuration, download firmware */
 381         if (dev->descriptor.bNumConfigurations == 1) {
 382                 status = ti_download_firmware(tdev);
 383
 384                 if (status != 0)
 385                         goto free_tdev;
 386
 387                 /* 3410 must be reset, 5052 resets itself */
 388                 if (tdev->td_is_3410) {
 389                         msleep_interruptible(100);
 390                         usb_reset_device(dev);
 391                 }
 392
 393                 status = -ENODEV;
 394                 goto free_tdev;
 395         }
 396
 397         /* the second configuration must be set */
 398         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 399                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 400                 status = status ? status : -ENODEV;
 401                 goto free_tdev;
 402         }
 403
 404         return 0;
 405
 406 free_tdev:
 407         kfree(tdev);
 408         usb_set_serial_data(serial, NULL);
 409         return status;
 410 }
 411
 412
 413 static void ti_release(struct usb_serial *serial)
 414 {
 415         struct ti_device *tdev = usb_get_serial_data(serial);
 416
 417         kfree(tdev);
 418 }
 419
 420 static int ti_port_probe(struct usb_serial_port *port)
 421 {
 422         struct ti_port *tport;
 423
 424         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 425         if (!tport)
 426                 return -ENOMEM;
 427
 428         spin_lock_init(&tport->tp_lock);
 429         if (port == port->serial->port[0])
 430                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 431         else
 432                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 433         tport->tp_closing_wait = closing_wait;
 434         init_waitqueue_head(&tport->tp_write_wait);
 435         if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
 436                 kfree(tport);
 437                 return -ENOMEM;
 438         }
 439         tport->tp_port = port;
 440         tport->tp_tdev = usb_get_serial_data(port->serial);
 441         tport->tp_uart_mode = 0;        /* default is RS232 */
 442
 443         usb_set_serial_port_data(port, tport);
 444
 445         return 0;
 446 }
 447
 448 static int ti_port_remove(struct usb_serial_port *port)
 449 {
 450         struct ti_port *tport;
 451
 452         tport = usb_get_serial_port_data(port);
 453         kfifo_free(&tport->write_fifo);
 454         kfree(tport);
 455
 456         return 0;
 457 }
 458
 459 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 460 {
 461         struct ti_port *tport = usb_get_serial_port_data(port);
 462         struct ti_device *tdev;
 463         struct usb_device *dev;
 464         struct urb *urb;
 465         int port_number;
 466         int status;
 467         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 468                              TI_PIPE_TIMEOUT_ENABLE |
 469                              (TI_TRANSFER_TIMEOUT << 2));
 470
 471         if (tport == NULL)
 472                 return -ENODEV;
 473
 474         dev = port->serial->dev;
 475         tdev = tport->tp_tdev;
 476
 477         /* only one open on any port on a device at a time */
 478         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 479                 return -ERESTARTSYS;
 480
 481         port_number = port->number - port->serial->minor;
 482
 483         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 484
 485         tport->tp_msr = 0;
 486         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 487
 488         /* start interrupt urb the first time a port is opened on this device */
 489         if (tdev->td_open_port_count == 0) {
 490                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 491                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 492                 if (!urb) {
 493                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 494                         status = -EINVAL;
 495                         goto release_lock;
 496                 }
 497                 urb->context = tdev;
 498                 status = usb_submit_urb(urb, GFP_KERNEL);
 499                 if (status) {
 500                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 501                         goto release_lock;
 502                 }
 503         }
 504
 505         if (tty)
 506                 ti_set_termios(tty, port, &tty->termios);
 507
 508         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 509         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 510                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 511         if (status) {
 512                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 513                         __func__, status);
 514                 goto unlink_int_urb;
 515         }
 516
 517         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 518         status = ti_command_out_sync(tdev, TI_START_PORT,
 519                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 520         if (status) {
 521                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 522                                                         __func__, status);
 523                 goto unlink_int_urb;
 524         }
 525
 526         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 527         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 528                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 529         if (status) {
 530                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 531                                                         __func__, status);
 532                 goto unlink_int_urb;
 533         }
 534         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 535                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 536         if (status) {
 537                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 538                                                         __func__, status);
 539                 goto unlink_int_urb;
 540         }
 541
 542         /* reset the data toggle on the bulk endpoints to work around bug in
 543          * host controllers where things get out of sync some times */
 544         usb_clear_halt(dev, port->write_urb->pipe);
 545         usb_clear_halt(dev, port->read_urb->pipe);
 546
 547         if (tty)
 548                 ti_set_termios(tty, port, &tty->termios);
 549
 550         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 551         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 552                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 553         if (status) {
 554                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 555                                                         __func__, status);
 556                 goto unlink_int_urb;
 557         }
 558
 559         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 560         status = ti_command_out_sync(tdev, TI_START_PORT,
 561                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 562         if (status) {
 563                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 564                                                         __func__, status);
 565                 goto unlink_int_urb;
 566         }
 567
 568         /* start read urb */
 569         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 570         urb = port->read_urb;
 571         if (!urb) {
 572                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 573                 status = -EINVAL;
 574                 goto unlink_int_urb;
 575         }
 576         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 577         urb->context = tport;
 578         status = usb_submit_urb(urb, GFP_KERNEL);
 579         if (status) {
 580                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 581                                                         __func__, status);
 582                 goto unlink_int_urb;
 583         }
 584
 585         tport->tp_is_open = 1;
 586         ++tdev->td_open_port_count;
 587
 588         goto release_lock;
 589
 590 unlink_int_urb:
 591         if (tdev->td_open_port_count == 0)
 592                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 593 release_lock:
 594         mutex_unlock(&tdev->td_open_close_lock);
 595         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 596         return status;
 597 }
 598
 599
 600 static void ti_close(struct usb_serial_port *port)
 601 {
 602         struct ti_device *tdev;
 603         struct ti_port *tport;
 604         int port_number;
 605         int status;
 606         int do_unlock;
 607
 608         tdev = usb_get_serial_data(port->serial);
 609         tport = usb_get_serial_port_data(port);
 610         if (tdev == NULL || tport == NULL)
 611                 return;
 612
 613         tport->tp_is_open = 0;
 614
 615         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 616
 617         usb_kill_urb(port->read_urb);
 618         usb_kill_urb(port->write_urb);
 619         tport->tp_write_urb_in_use = 0;
 620
 621         port_number = port->number - port->serial->minor;
 622
 623         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 624         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 625                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 626         if (status)
 627                 dev_err(&port->dev,
 628                         "%s - cannot send close port command, %d\n"
 629                                                         , __func__, status);
 630
 631         /* if mutex_lock is interrupted, continue anyway */
 632         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 633         --tport->tp_tdev->td_open_port_count;
 634         if (tport->tp_tdev->td_open_port_count <= 0) {
 635                 /* last port is closed, shut down interrupt urb */
 636                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 637                 tport->tp_tdev->td_open_port_count = 0;
 638         }
 639         if (do_unlock)
 640                 mutex_unlock(&tdev->td_open_close_lock);
 641 }
 642
 643
 644 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 645                         const unsigned char *data, int count)
 646 {
 647         struct ti_port *tport = usb_get_serial_port_data(port);
 648
 649         if (count == 0) {
 650                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 651                 return 0;
 652         }
 653
 654         if (tport == NULL || !tport->tp_is_open)
 655                 return -ENODEV;
 656
 657         count = kfifo_in_locked(&tport->write_fifo, data, count,
 658                                                         &tport->tp_lock);
 659         ti_send(tport);
 660
 661         return count;
 662 }
 663
 664
 665 static int ti_write_room(struct tty_struct *tty)
 666 {
 667         struct usb_serial_port *port = tty->driver_data;
 668         struct ti_port *tport = usb_get_serial_port_data(port);
 669         int room = 0;
 670         unsigned long flags;
 671
 672         if (tport == NULL)
 673                 return 0;
 674
 675         spin_lock_irqsave(&tport->tp_lock, flags);
 676         room = kfifo_avail(&tport->write_fifo);
 677         spin_unlock_irqrestore(&tport->tp_lock, flags);
 678
 679         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 680         return room;
 681 }
 682
 683
 684 static int ti_chars_in_buffer(struct tty_struct *tty)
 685 {
 686         struct usb_serial_port *port = tty->driver_data;
 687         struct ti_port *tport = usb_get_serial_port_data(port);
 688         int chars = 0;
 689         unsigned long flags;
 690
 691         if (tport == NULL)
 692                 return 0;
 693
 694         spin_lock_irqsave(&tport->tp_lock, flags);
 695         chars = kfifo_len(&tport->write_fifo);
 696         spin_unlock_irqrestore(&tport->tp_lock, flags);
 697
 698         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 699         return chars;
 700 }
 701
 702
 703 static void ti_throttle(struct tty_struct *tty)
 704 {
 705         struct usb_serial_port *port = tty->driver_data;
 706         struct ti_port *tport = usb_get_serial_port_data(port);
 707
 708         if (tport == NULL)
 709                 return;
 710
 711         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 712                 ti_stop_read(tport, tty);
 713
 714 }
 715
 716
 717 static void ti_unthrottle(struct tty_struct *tty)
 718 {
 719         struct usb_serial_port *port = tty->driver_data;
 720         struct ti_port *tport = usb_get_serial_port_data(port);
 721         int status;
 722
 723         if (tport == NULL)
 724                 return;
 725
 726         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 727                 status = ti_restart_read(tport, tty);
 728                 if (status)
 729                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 730                                                         __func__, status);
 731         }
 732 }
 733
 734 static int ti_get_icount(struct tty_struct *tty,
 735                 struct serial_icounter_struct *icount)
 736 {
 737         struct usb_serial_port *port = tty->driver_data;
 738         struct ti_port *tport = usb_get_serial_port_data(port);
 739         struct async_icount cnow = tport->tp_icount;
 740
 741         dev_dbg(&port->dev, "%s - TIOCGICOUNT RX=%d, TX=%d\n", __func__,
 742                 cnow.rx, cnow.tx);
 743
 744         icount->cts = cnow.cts;
 745         icount->dsr = cnow.dsr;
 746         icount->rng = cnow.rng;
 747         icount->dcd = cnow.dcd;
 748         icount->rx = cnow.rx;
 749         icount->tx = cnow.tx;
 750         icount->frame = cnow.frame;
 751         icount->overrun = cnow.overrun;
 752         icount->parity = cnow.parity;
 753         icount->brk = cnow.brk;
 754         icount->buf_overrun = cnow.buf_overrun;
 755
 756         return 0;
 757 }
 758
 759 static int ti_ioctl(struct tty_struct *tty,
 760         unsigned int cmd, unsigned long arg)
 761 {
 762         struct usb_serial_port *port = tty->driver_data;
 763         struct ti_port *tport = usb_get_serial_port_data(port);
 764         struct async_icount cnow;
 765         struct async_icount cprev;
 766
 767         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 768
 769         if (tport == NULL)
 770                 return -ENODEV;
 771
 772         switch (cmd) {
 773         case TIOCGSERIAL:
 774                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 775                 return ti_get_serial_info(tport,
 776                                 (struct serial_struct __user *)arg);
 777         case TIOCSSERIAL:
 778                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 779                 return ti_set_serial_info(tty, tport,
 780                                 (struct serial_struct __user *)arg);
 781         case TIOCMIWAIT:
 782                 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__);
 783                 cprev = tport->tp_icount;
 784                 while (1) {
 785                         interruptible_sleep_on(&port->delta_msr_wait);
 786                         if (signal_pending(current))
 787                                 return -ERESTARTSYS;
 788
 789                         if (port->serial->disconnected)
 790                                 return -EIO;
 791
 792                         cnow = tport->tp_icount;
 793                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 794                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 795                                 return -EIO; /* no change => error */
 796                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 797                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 798                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 799                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 800                                 return 0;
 801                         cprev = cnow;
 802                 }
 803                 break;
 804         }
 805         return -ENOIOCTLCMD;
 806 }
 807
 808
 809 static void ti_set_termios(struct tty_struct *tty,
 810                 struct usb_serial_port *port, struct ktermios *old_termios)
 811 {
 812         struct ti_port *tport = usb_get_serial_port_data(port);
 813         struct ti_uart_config *config;
 814         tcflag_t cflag, iflag;
 815         int baud;
 816         int status;
 817         int port_number = port->number - port->serial->minor;
 818         unsigned int mcr;
 819
 820         cflag = tty->termios.c_cflag;
 821         iflag = tty->termios.c_iflag;
 822
 823         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 824         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 825                 old_termios->c_cflag, old_termios->c_iflag);
 826
 827         if (tport == NULL)
 828                 return;
 829
 830         config = kmalloc(sizeof(*config), GFP_KERNEL);
 831         if (!config) {
 832                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 833                 return;
 834         }
 835
 836         config->wFlags = 0;
 837
 838         /* these flags must be set */
 839         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 840         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 841         config->bUartMode = (__u8)(tport->tp_uart_mode);
 842
 843         switch (cflag & CSIZE) {
 844         case CS5:
 845                     config->bDataBits = TI_UART_5_DATA_BITS;
 846                     break;
 847         case CS6:
 848                     config->bDataBits = TI_UART_6_DATA_BITS;
 849                     break;
 850         case CS7:
 851                     config->bDataBits = TI_UART_7_DATA_BITS;
 852                     break;
 853         default:
 854         case CS8:
 855                     config->bDataBits = TI_UART_8_DATA_BITS;
 856                     break;
 857         }
 858
 859         /* CMSPAR isn't supported by this driver */
 860         tty->termios.c_cflag &= ~CMSPAR;
 861
 862         if (cflag & PARENB) {
 863                 if (cflag & PARODD) {
 864                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 865                         config->bParity = TI_UART_ODD_PARITY;
 866                 } else {
 867                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 868                         config->bParity = TI_UART_EVEN_PARITY;
 869                 }
 870         } else {
 871                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 872                 config->bParity = TI_UART_NO_PARITY;
 873         }
 874
 875         if (cflag & CSTOPB)
 876                 config->bStopBits = TI_UART_2_STOP_BITS;
 877         else
 878                 config->bStopBits = TI_UART_1_STOP_BITS;
 879
 880         if (cflag & CRTSCTS) {
 881                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 882                 if ((cflag & CBAUD) != B0)
 883                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 884                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 885         } else {
 886                 tty->hw_stopped = 0;
 887                 ti_restart_read(tport, tty);
 888         }
 889
 890         if (I_IXOFF(tty) || I_IXON(tty)) {
 891                 config->cXon  = START_CHAR(tty);
 892                 config->cXoff = STOP_CHAR(tty);
 893
 894                 if (I_IXOFF(tty))
 895                         config->wFlags |= TI_UART_ENABLE_X_IN;
 896                 else
 897                         ti_restart_read(tport, tty);
 898
 899                 if (I_IXON(tty))
 900                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 901         }
 902
 903         baud = tty_get_baud_rate(tty);
 904         if (!baud)
 905                 baud = 9600;
 906         if (tport->tp_tdev->td_is_3410)
 907                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 908         else
 909                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 910
 911         /* FIXME: Should calculate resulting baud here and report it back */
 912         if ((cflag & CBAUD) != B0)
 913                 tty_encode_baud_rate(tty, baud, baud);
 914
 915         dev_dbg(&port->dev,
 916                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 917                 __func__, baud, config->wBaudRate, config->wFlags,
 918                 config->bDataBits, config->bParity, config->bStopBits,
 919                 config->cXon, config->cXoff, config->bUartMode);
 920
 921         cpu_to_be16s(&config->wBaudRate);
 922         cpu_to_be16s(&config->wFlags);
 923
 924         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 925                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 926                 sizeof(*config));
 927         if (status)
 928                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 929                                         __func__, port_number, status);
 930
 931         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 932         mcr = tport->tp_shadow_mcr;
 933         /* if baud rate is B0, clear RTS and DTR */
 934         if ((cflag & CBAUD) == B0)
 935                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 936         status = ti_set_mcr(tport, mcr);
 937         if (status)
 938                 dev_err(&port->dev,
 939                         "%s - cannot set modem control on port %d, %d\n",
 940                                                 __func__, port_number, status);
 941
 942         kfree(config);
 943 }
 944
 945
 946 static int ti_tiocmget(struct tty_struct *tty)
 947 {
 948         struct usb_serial_port *port = tty->driver_data;
 949         struct ti_port *tport = usb_get_serial_port_data(port);
 950         unsigned int result;
 951         unsigned int msr;
 952         unsigned int mcr;
 953         unsigned long flags;
 954
 955         if (tport == NULL)
 956                 return -ENODEV;
 957
 958         spin_lock_irqsave(&tport->tp_lock, flags);
 959         msr = tport->tp_msr;
 960         mcr = tport->tp_shadow_mcr;
 961         spin_unlock_irqrestore(&tport->tp_lock, flags);
 962
 963         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 964                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 965                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 966                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 967                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 968                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 969                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 970
 971         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 972
 973         return result;
 974 }
 975
 976
 977 static int ti_tiocmset(struct tty_struct *tty,
 978                                 unsigned int set, unsigned int clear)
 979 {
 980         struct usb_serial_port *port = tty->driver_data;
 981         struct ti_port *tport = usb_get_serial_port_data(port);
 982         unsigned int mcr;
 983         unsigned long flags;
 984
 985         if (tport == NULL)
 986                 return -ENODEV;
 987
 988         spin_lock_irqsave(&tport->tp_lock, flags);
 989         mcr = tport->tp_shadow_mcr;
 990
 991         if (set & TIOCM_RTS)
 992                 mcr |= TI_MCR_RTS;
 993         if (set & TIOCM_DTR)
 994                 mcr |= TI_MCR_DTR;
 995         if (set & TIOCM_LOOP)
 996                 mcr |= TI_MCR_LOOP;
 997
 998         if (clear & TIOCM_RTS)
 999                 mcr &= ~TI_MCR_RTS;
1000         if (clear & TIOCM_DTR)
1001                 mcr &= ~TI_MCR_DTR;
1002         if (clear & TIOCM_LOOP)
1003                 mcr &= ~TI_MCR_LOOP;
1004         spin_unlock_irqrestore(&tport->tp_lock, flags);
1005
1006         return ti_set_mcr(tport, mcr);
1007 }
1008
1009
1010 static void ti_break(struct tty_struct *tty, int break_state)
1011 {
1012         struct usb_serial_port *port = tty->driver_data;
1013         struct ti_port *tport = usb_get_serial_port_data(port);
1014         int status;
1015
1016         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1017
1018         if (tport == NULL)
1019                 return;
1020
1021         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1022
1023         status = ti_write_byte(port, tport->tp_tdev,
1024                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1025                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1026
1027         if (status)
1028                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1029 }
1030
1031
1032 static void ti_interrupt_callback(struct urb *urb)
1033 {
1034         struct ti_device *tdev = urb->context;
1035         struct usb_serial_port *port;
1036         struct usb_serial *serial = tdev->td_serial;
1037         struct ti_port *tport;
1038         struct device *dev = &urb->dev->dev;
1039         unsigned char *data = urb->transfer_buffer;
1040         int length = urb->actual_length;
1041         int port_number;
1042         int function;
1043         int status = urb->status;
1044         int retval;
1045         __u8 msr;
1046
1047         switch (status) {
1048         case 0:
1049                 break;
1050         case -ECONNRESET:
1051         case -ENOENT:
1052         case -ESHUTDOWN:
1053                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1054                 tdev->td_urb_error = 1;
1055                 return;
1056         default:
1057                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1058                 tdev->td_urb_error = 1;
1059                 goto exit;
1060         }
1061
1062         if (length != 2) {
1063                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1064                 goto exit;
1065         }
1066
1067         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1068                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1069                 goto exit;
1070         }
1071
1072         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1073         function = TI_GET_FUNC_FROM_CODE(data[0]);
1074
1075         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1076                 __func__, port_number, function, data[1]);
1077
1078         if (port_number >= serial->num_ports) {
1079                 dev_err(dev, "%s - bad port number, %d\n",
1080                                                 __func__, port_number);
1081                 goto exit;
1082         }
1083
1084         port = serial->port[port_number];
1085
1086         tport = usb_get_serial_port_data(port);
1087         if (!tport)
1088                 goto exit;
1089
1090         switch (function) {
1091         case TI_CODE_DATA_ERROR:
1092                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1093                         __func__, port_number, data[1]);
1094                 break;
1095
1096         case TI_CODE_MODEM_STATUS:
1097                 msr = data[1];
1098                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1099                 ti_handle_new_msr(tport, msr);
1100                 break;
1101
1102         default:
1103                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1104                                                         __func__, data[1]);
1105                 break;
1106         }
1107
1108 exit:
1109         retval = usb_submit_urb(urb, GFP_ATOMIC);
1110         if (retval)
1111                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1112                         __func__, retval);
1113 }
1114
1115
1116 static void ti_bulk_in_callback(struct urb *urb)
1117 {
1118         struct ti_port *tport = urb->context;
1119         struct usb_serial_port *port = tport->tp_port;
1120         struct device *dev = &urb->dev->dev;
1121         int status = urb->status;
1122         int retval = 0;
1123
1124         switch (status) {
1125         case 0:
1126                 break;
1127         case -ECONNRESET:
1128         case -ENOENT:
1129         case -ESHUTDOWN:
1130                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1131                 tport->tp_tdev->td_urb_error = 1;
1132                 wake_up_interruptible(&tport->tp_write_wait);
1133                 return;
1134         default:
1135                 dev_err(dev, "%s - nonzero urb status, %d\n",
1136                         __func__, status);
1137                 tport->tp_tdev->td_urb_error = 1;
1138                 wake_up_interruptible(&tport->tp_write_wait);
1139         }
1140
1141         if (status == -EPIPE)
1142                 goto exit;
1143
1144         if (status) {
1145                 dev_err(dev, "%s - stopping read!\n", __func__);
1146                 return;
1147         }
1148
1149         if (urb->actual_length) {
1150                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1151                                       urb->transfer_buffer);
1152
1153                 if (!tport->tp_is_open)
1154                         dev_dbg(dev, "%s - port closed, dropping data\n",
1155                                 __func__);
1156                 else
1157                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1158                 spin_lock(&tport->tp_lock);
1159                 tport->tp_icount.rx += urb->actual_length;
1160                 spin_unlock(&tport->tp_lock);
1161         }
1162
1163 exit:
1164         /* continue to read unless stopping */
1165         spin_lock(&tport->tp_lock);
1166         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1167                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1168         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1169                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1170
1171         spin_unlock(&tport->tp_lock);
1172         if (retval)
1173                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1174                         __func__, retval);
1175 }
1176
1177
1178 static void ti_bulk_out_callback(struct urb *urb)
1179 {
1180         struct ti_port *tport = urb->context;
1181         struct usb_serial_port *port = tport->tp_port;
1182         int status = urb->status;
1183
1184         tport->tp_write_urb_in_use = 0;
1185
1186         switch (status) {
1187         case 0:
1188                 break;
1189         case -ECONNRESET:
1190         case -ENOENT:
1191         case -ESHUTDOWN:
1192                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1193                 tport->tp_tdev->td_urb_error = 1;
1194                 wake_up_interruptible(&tport->tp_write_wait);
1195                 return;
1196         default:
1197                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1198                         __func__, status);
1199                 tport->tp_tdev->td_urb_error = 1;
1200                 wake_up_interruptible(&tport->tp_write_wait);
1201         }
1202
1203         /* send any buffered data */
1204         ti_send(tport);
1205 }
1206
1207
1208 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1209                 int length)
1210 {
1211         int cnt;
1212
1213         do {
1214                 cnt = tty_insert_flip_string(&port->port, data, length);
1215                 if (cnt < length) {
1216                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1217                                                 __func__, length - cnt);
1218                         if (cnt == 0)
1219                                 break;
1220                 }
1221                 tty_flip_buffer_push(&port->port);
1222                 data += cnt;
1223                 length -= cnt;
1224         } while (length > 0);
1225 }
1226
1227
1228 static void ti_send(struct ti_port *tport)
1229 {
1230         int count, result;
1231         struct usb_serial_port *port = tport->tp_port;
1232         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1233         unsigned long flags;
1234
1235         spin_lock_irqsave(&tport->tp_lock, flags);
1236
1237         if (tport->tp_write_urb_in_use)
1238                 goto unlock;
1239
1240         count = kfifo_out(&tport->write_fifo,
1241                                 port->write_urb->transfer_buffer,
1242                                 port->bulk_out_size);
1243
1244         if (count == 0)
1245                 goto unlock;
1246
1247         tport->tp_write_urb_in_use = 1;
1248
1249         spin_unlock_irqrestore(&tport->tp_lock, flags);
1250
1251         usb_serial_debug_data(&port->dev, __func__, count,
1252                               port->write_urb->transfer_buffer);
1253
1254         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1255                            usb_sndbulkpipe(port->serial->dev,
1256                                             port->bulk_out_endpointAddress),
1257                            port->write_urb->transfer_buffer, count,
1258                            ti_bulk_out_callback, tport);
1259
1260         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1261         if (result) {
1262                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1263                                                         __func__, result);
1264                 tport->tp_write_urb_in_use = 0;
1265                 /* TODO: reschedule ti_send */
1266         } else {
1267                 spin_lock_irqsave(&tport->tp_lock, flags);
1268                 tport->tp_icount.tx += count;
1269                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1270         }
1271
1272         /* more room in the buffer for new writes, wakeup */
1273         if (tty)
1274                 tty_wakeup(tty);
1275         tty_kref_put(tty);
1276         wake_up_interruptible(&tport->tp_write_wait);
1277         return;
1278 unlock:
1279         spin_unlock_irqrestore(&tport->tp_lock, flags);
1280         tty_kref_put(tty);
1281         return;
1282 }
1283
1284
1285 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1286 {
1287         unsigned long flags;
1288         int status;
1289
1290         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1291                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1292                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1293
1294         spin_lock_irqsave(&tport->tp_lock, flags);
1295         if (!status)
1296                 tport->tp_shadow_mcr = mcr;
1297         spin_unlock_irqrestore(&tport->tp_lock, flags);
1298
1299         return status;
1300 }
1301
1302
1303 static int ti_get_lsr(struct ti_port *tport)
1304 {
1305         int size, status;
1306         struct ti_device *tdev = tport->tp_tdev;
1307         struct usb_serial_port *port = tport->tp_port;
1308         int port_number = port->number - port->serial->minor;
1309         struct ti_port_status *data;
1310
1311         size = sizeof(struct ti_port_status);
1312         data = kmalloc(size, GFP_KERNEL);
1313         if (!data) {
1314                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1315                 return -ENOMEM;
1316         }
1317
1318         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1319                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1320         if (status) {
1321                 dev_err(&port->dev,
1322                         "%s - get port status command failed, %d\n",
1323                                                         __func__, status);
1324                 goto free_data;
1325         }
1326
1327         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1328
1329         tport->tp_lsr = data->bLSR;
1330
1331 free_data:
1332         kfree(data);
1333         return status;
1334 }
1335
1336
1337 static int ti_get_serial_info(struct ti_port *tport,
1338         struct serial_struct __user *ret_arg)
1339 {
1340         struct usb_serial_port *port = tport->tp_port;
1341         struct serial_struct ret_serial;
1342
1343         if (!ret_arg)
1344                 return -EFAULT;
1345
1346         memset(&ret_serial, 0, sizeof(ret_serial));
1347
1348         ret_serial.type = PORT_16550A;
1349         ret_serial.line = port->serial->minor;
1350         ret_serial.port = port->number - port->serial->minor;
1351         ret_serial.flags = tport->tp_flags;
1352         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1353         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1354         ret_serial.closing_wait = tport->tp_closing_wait;
1355
1356         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1357                 return -EFAULT;
1358
1359         return 0;
1360 }
1361
1362
1363 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1364         struct serial_struct __user *new_arg)
1365 {
1366         struct serial_struct new_serial;
1367
1368         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1369                 return -EFAULT;
1370
1371         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1372         tport->tp_closing_wait = new_serial.closing_wait;
1373
1374         return 0;
1375 }
1376
1377
1378 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1379 {
1380         struct async_icount *icount;
1381         struct tty_struct *tty;
1382         unsigned long flags;
1383
1384         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1385
1386         if (msr & TI_MSR_DELTA_MASK) {
1387                 spin_lock_irqsave(&tport->tp_lock, flags);
1388                 icount = &tport->tp_icount;
1389                 if (msr & TI_MSR_DELTA_CTS)
1390                         icount->cts++;
1391                 if (msr & TI_MSR_DELTA_DSR)
1392                         icount->dsr++;
1393                 if (msr & TI_MSR_DELTA_CD)
1394                         icount->dcd++;
1395                 if (msr & TI_MSR_DELTA_RI)
1396                         icount->rng++;
1397                 wake_up_interruptible(&tport->tp_port->delta_msr_wait);
1398                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1399         }
1400
1401         tport->tp_msr = msr & TI_MSR_MASK;
1402
1403         /* handle CTS flow control */
1404         tty = tty_port_tty_get(&tport->tp_port->port);
1405         if (tty && C_CRTSCTS(tty)) {
1406                 if (msr & TI_MSR_CTS) {
1407                         tty->hw_stopped = 0;
1408                         tty_wakeup(tty);
1409                 } else {
1410                         tty->hw_stopped = 1;
1411                 }
1412         }
1413         tty_kref_put(tty);
1414 }
1415
1416
1417 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1418 {
1419         struct ti_device *tdev = tport->tp_tdev;
1420         struct usb_serial_port *port = tport->tp_port;
1421         wait_queue_t wait;
1422
1423         spin_lock_irq(&tport->tp_lock);
1424
1425         /* wait for data to drain from the buffer */
1426         tdev->td_urb_error = 0;
1427         init_waitqueue_entry(&wait, current);
1428         add_wait_queue(&tport->tp_write_wait, &wait);
1429         for (;;) {
1430                 set_current_state(TASK_INTERRUPTIBLE);
1431                 if (kfifo_len(&tport->write_fifo) == 0
1432                 || timeout == 0 || signal_pending(current)
1433                 || tdev->td_urb_error
1434                 || port->serial->disconnected)  /* disconnect */
1435                         break;
1436                 spin_unlock_irq(&tport->tp_lock);
1437                 timeout = schedule_timeout(timeout);
1438                 spin_lock_irq(&tport->tp_lock);
1439         }
1440         set_current_state(TASK_RUNNING);
1441         remove_wait_queue(&tport->tp_write_wait, &wait);
1442
1443         /* flush any remaining data in the buffer */
1444         if (flush)
1445                 kfifo_reset_out(&tport->write_fifo);
1446
1447         spin_unlock_irq(&tport->tp_lock);
1448
1449         mutex_lock(&port->serial->disc_mutex);
1450         /* wait for data to drain from the device */
1451         /* wait for empty tx register, plus 20 ms */
1452         timeout += jiffies;
1453         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1454         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1455         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1456         && !port->serial->disconnected) {
1457                 if (ti_get_lsr(tport))
1458                         break;
1459                 mutex_unlock(&port->serial->disc_mutex);
1460                 msleep_interruptible(20);
1461                 mutex_lock(&port->serial->disc_mutex);
1462         }
1463         mutex_unlock(&port->serial->disc_mutex);
1464 }
1465
1466
1467 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1468 {
1469         unsigned long flags;
1470
1471         spin_lock_irqsave(&tport->tp_lock, flags);
1472
1473         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1474                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1475
1476         spin_unlock_irqrestore(&tport->tp_lock, flags);
1477 }
1478
1479
1480 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1481 {
1482         struct urb *urb;
1483         int status = 0;
1484         unsigned long flags;
1485
1486         spin_lock_irqsave(&tport->tp_lock, flags);
1487
1488         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1489                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1490                 urb = tport->tp_port->read_urb;
1491                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1492                 urb->context = tport;
1493                 status = usb_submit_urb(urb, GFP_KERNEL);
1494         } else  {
1495                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1496                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1497         }
1498
1499         return status;
1500 }
1501
1502
1503 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1504         __u16 moduleid, __u16 value, __u8 *data, int size)
1505 {
1506         int status;
1507
1508         status = usb_control_msg(tdev->td_serial->dev,
1509                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1510                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1511                 value, moduleid, data, size, 1000);
1512
1513         if (status == size)
1514                 status = 0;
1515
1516         if (status > 0)
1517                 status = -ECOMM;
1518
1519         return status;
1520 }
1521
1522
1523 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1524         __u16 moduleid, __u16 value, __u8 *data, int size)
1525 {
1526         int status;
1527
1528         status = usb_control_msg(tdev->td_serial->dev,
1529                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1530                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1531                 value, moduleid, data, size, 1000);
1532
1533         if (status == size)
1534                 status = 0;
1535
1536         if (status > 0)
1537                 status = -ECOMM;
1538
1539         return status;
1540 }
1541
1542
1543 static int ti_write_byte(struct usb_serial_port *port,
1544                         struct ti_device *tdev, unsigned long addr,
1545                         __u8 mask, __u8 byte)
1546 {
1547         int status;
1548         unsigned int size;
1549         struct ti_write_data_bytes *data;
1550
1551         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1552                 addr, mask, byte);
1553
1554         size = sizeof(struct ti_write_data_bytes) + 2;
1555         data = kmalloc(size, GFP_KERNEL);
1556         if (!data) {
1557                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1558                 return -ENOMEM;
1559         }
1560
1561         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1562         data->bDataType = TI_RW_DATA_BYTE;
1563         data->bDataCounter = 1;
1564         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1565         data->wBaseAddrLo = cpu_to_be16(addr);
1566         data->bData[0] = mask;
1567         data->bData[1] = byte;
1568
1569         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1570                 (__u8 *)data, size);
1571
1572         if (status < 0)
1573                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1574
1575         kfree(data);
1576
1577         return status;
1578 }
1579
1580 static int ti_do_download(struct usb_device *dev, int pipe,
1581                                                 u8 *buffer, int size)
1582 {
1583         int pos;
1584         u8 cs = 0;
1585         int done;
1586         struct ti_firmware_header *header;
1587         int status = 0;
1588         int len;
1589
1590         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1591                 cs = (__u8)(cs + buffer[pos]);
1592
1593         header = (struct ti_firmware_header *)buffer;
1594         header->wLength = cpu_to_le16((__u16)(size
1595                                         - sizeof(struct ti_firmware_header)));
1596         header->bCheckSum = cs;
1597
1598         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1599         for (pos = 0; pos < size; pos += done) {
1600                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1601                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1602                                                                 &done, 1000);
1603                 if (status)
1604                         break;
1605         }
1606         return status;
1607 }
1608
1609 static int ti_download_firmware(struct ti_device *tdev)
1610 {
1611         int status;
1612         int buffer_size;
1613         __u8 *buffer;
1614         struct usb_device *dev = tdev->td_serial->dev;
1615         unsigned int pipe = usb_sndbulkpipe(dev,
1616                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1617         const struct firmware *fw_p;
1618         char buf[32];
1619
1620         /* try ID specific firmware first, then try generic firmware */
1621         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1622             dev->descriptor.idProduct);
1623         status = request_firmware(&fw_p, buf, &dev->dev);
1624
1625         if (status != 0) {
1626                 buf[0] = '\0';
1627                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1628                         switch (dev->descriptor.idProduct) {
1629                         case MTS_CDMA_PRODUCT_ID:
1630                                 strcpy(buf, "mts_cdma.fw");
1631                                 break;
1632                         case MTS_GSM_PRODUCT_ID:
1633                                 strcpy(buf, "mts_gsm.fw");
1634                                 break;
1635                         case MTS_EDGE_PRODUCT_ID:
1636                                 strcpy(buf, "mts_edge.fw");
1637                                 break;
1638                         case MTS_MT9234MU_PRODUCT_ID:
1639                                 strcpy(buf, "mts_mt9234mu.fw");
1640                                 break;
1641                         case MTS_MT9234ZBA_PRODUCT_ID:
1642                                 strcpy(buf, "mts_mt9234zba.fw");
1643                                 break;
1644                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1645                                 strcpy(buf, "mts_mt9234zba.fw");
1646                                 break;                  }
1647                 }
1648                 if (buf[0] == '\0') {
1649                         if (tdev->td_is_3410)
1650                                 strcpy(buf, "ti_3410.fw");
1651                         else
1652                                 strcpy(buf, "ti_5052.fw");
1653                 }
1654                 status = request_firmware(&fw_p, buf, &dev->dev);
1655         }
1656         if (status) {
1657                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1658                 return -ENOENT;
1659         }
1660         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1661                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1662                 release_firmware(fw_p);
1663                 return -ENOENT;
1664         }
1665
1666         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1667         buffer = kmalloc(buffer_size, GFP_KERNEL);
1668         if (buffer) {
1669                 memcpy(buffer, fw_p->data, fw_p->size);
1670                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1671                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1672                 kfree(buffer);
1673         } else {
1674                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1675                 status = -ENOMEM;
1676         }
1677         release_firmware(fw_p);
1678         if (status) {
1679                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1680                                                         __func__, status);
1681                 return status;
1682         }
1683
1684         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1685
1686         return 0;
1687 }