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/slab.h>
  25 #include <linux/tty.h>
  26 #include <linux/tty_driver.h>
  27 #include <linux/tty_flip.h>
  28 #include <linux/module.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/ioctl.h>
  31 #include <linux/serial.h>
  32 #include <linux/kfifo.h>
  33 #include <linux/mutex.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/usb.h>
  36 #include <linux/usb/serial.h>
  37
  38 #include "ti_usb_3410_5052.h"
  39
  40 /* Defines */
  41
  42 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  43 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  44
  45 #define TI_FIRMWARE_BUF_SIZE    16284
  46
  47 #define TI_TRANSFER_TIMEOUT     2
  48
  49 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  50
  51 /* supported setserial flags */
  52 #define TI_SET_SERIAL_FLAGS     0
  53
  54 /* read urb states */
  55 #define TI_READ_URB_RUNNING     0
  56 #define TI_READ_URB_STOPPING    1
  57 #define TI_READ_URB_STOPPED     2
  58
  59 #define TI_EXTRA_VID_PID_COUNT  5
  60
  61
  62 /* Structures */
  63
  64 struct ti_port {
  65         int                     tp_is_open;
  66         __u8                    tp_msr;
  67         __u8                    tp_shadow_mcr;
  68         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  69         unsigned int            tp_uart_base_addr;
  70         int                     tp_flags;
  71         struct ti_device        *tp_tdev;
  72         struct usb_serial_port  *tp_port;
  73         spinlock_t              tp_lock;
  74         int                     tp_read_urb_state;
  75         int                     tp_write_urb_in_use;
  76 };
  77
  78 struct ti_device {
  79         struct mutex            td_open_close_lock;
  80         int                     td_open_port_count;
  81         struct usb_serial       *td_serial;
  82         int                     td_is_3410;
  83         int                     td_urb_error;
  84 };
  85
  86
  87 /* Function Declarations */
  88
  89 static int ti_startup(struct usb_serial *serial);
  90 static void ti_release(struct usb_serial *serial);
  91 static int ti_port_probe(struct usb_serial_port *port);
  92 static int ti_port_remove(struct usb_serial_port *port);
  93 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
  94 static void ti_close(struct usb_serial_port *port);
  95 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
  96                 const unsigned char *data, int count);
  97 static int ti_write_room(struct tty_struct *tty);
  98 static int ti_chars_in_buffer(struct tty_struct *tty);
  99 static bool ti_tx_empty(struct usb_serial_port *port);
 100 static void ti_throttle(struct tty_struct *tty);
 101 static void ti_unthrottle(struct tty_struct *tty);
 102 static int ti_ioctl(struct tty_struct *tty,
 103                 unsigned int cmd, unsigned long arg);
 104 static void ti_set_termios(struct tty_struct *tty,
 105                 struct usb_serial_port *port, struct ktermios *old_termios);
 106 static int ti_tiocmget(struct tty_struct *tty);
 107 static int ti_tiocmset(struct tty_struct *tty,
 108                 unsigned int set, unsigned int clear);
 109 static void ti_break(struct tty_struct *tty, int break_state);
 110 static void ti_interrupt_callback(struct urb *urb);
 111 static void ti_bulk_in_callback(struct urb *urb);
 112 static void ti_bulk_out_callback(struct urb *urb);
 113
 114 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
 115                 int length);
 116 static void ti_send(struct ti_port *tport);
 117 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 118 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
 119 static int ti_get_serial_info(struct ti_port *tport,
 120         struct serial_struct __user *ret_arg);
 121 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 122         struct serial_struct __user *new_arg);
 123 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 124
 125 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 126 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 127
 128 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 129         __u16 moduleid, __u16 value, __u8 *data, int size);
 130 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 131         __u16 moduleid, __u16 value, __u8 *data, int size);
 132
 133 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 134                          unsigned long addr, __u8 mask, __u8 byte);
 135
 136 static int ti_download_firmware(struct ti_device *tdev);
 137
 138
 139 /* Data */
 140
 141 /* module parameters */
 142 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 143
 144 /* supported devices */
 145 static const struct usb_device_id ti_id_table_3410[] = {
 146         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 147         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 148         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 149         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 150         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 151         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 152         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 153         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 154         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 155         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 156         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 157         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 158         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 159         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
 160         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 161         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 162         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 163         { }     /* terminator */
 164 };
 165
 166 static const struct usb_device_id ti_id_table_5052[] = {
 167         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 168         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 169         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 170         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 171         { }     /* terminator */
 172 };
 173
 174 static const struct usb_device_id ti_id_table_combined[] = {
 175         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 176         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 178         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 179         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 180         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 181         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 182         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 183         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 184         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 189         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 190         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 191         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 192         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 193         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 195         { USB_DEVICE(HONEYWELL_VENDOR_ID, HONEYWELL_HGI80_PRODUCT_ID) },
 196         { }     /* terminator */
 197 };
 198
 199 static struct usb_serial_driver ti_1port_device = {
 200         .driver = {
 201                 .owner          = THIS_MODULE,
 202                 .name           = "ti_usb_3410_5052_1",
 203         },
 204         .description            = "TI USB 3410 1 port adapter",
 205         .id_table               = ti_id_table_3410,
 206         .num_ports              = 1,
 207         .attach                 = ti_startup,
 208         .release                = ti_release,
 209         .port_probe             = ti_port_probe,
 210         .port_remove            = ti_port_remove,
 211         .open                   = ti_open,
 212         .close                  = ti_close,
 213         .write                  = ti_write,
 214         .write_room             = ti_write_room,
 215         .chars_in_buffer        = ti_chars_in_buffer,
 216         .tx_empty               = ti_tx_empty,
 217         .throttle               = ti_throttle,
 218         .unthrottle             = ti_unthrottle,
 219         .ioctl                  = ti_ioctl,
 220         .set_termios            = ti_set_termios,
 221         .tiocmget               = ti_tiocmget,
 222         .tiocmset               = ti_tiocmset,
 223         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 224         .get_icount             = usb_serial_generic_get_icount,
 225         .break_ctl              = ti_break,
 226         .read_int_callback      = ti_interrupt_callback,
 227         .read_bulk_callback     = ti_bulk_in_callback,
 228         .write_bulk_callback    = ti_bulk_out_callback,
 229 };
 230
 231 static struct usb_serial_driver ti_2port_device = {
 232         .driver = {
 233                 .owner          = THIS_MODULE,
 234                 .name           = "ti_usb_3410_5052_2",
 235         },
 236         .description            = "TI USB 5052 2 port adapter",
 237         .id_table               = ti_id_table_5052,
 238         .num_ports              = 2,
 239         .attach                 = ti_startup,
 240         .release                = ti_release,
 241         .port_probe             = ti_port_probe,
 242         .port_remove            = ti_port_remove,
 243         .open                   = ti_open,
 244         .close                  = ti_close,
 245         .write                  = ti_write,
 246         .write_room             = ti_write_room,
 247         .chars_in_buffer        = ti_chars_in_buffer,
 248         .tx_empty               = ti_tx_empty,
 249         .throttle               = ti_throttle,
 250         .unthrottle             = ti_unthrottle,
 251         .ioctl                  = ti_ioctl,
 252         .set_termios            = ti_set_termios,
 253         .tiocmget               = ti_tiocmget,
 254         .tiocmset               = ti_tiocmset,
 255         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 256         .get_icount             = usb_serial_generic_get_icount,
 257         .break_ctl              = ti_break,
 258         .read_int_callback      = ti_interrupt_callback,
 259         .read_bulk_callback     = ti_bulk_in_callback,
 260         .write_bulk_callback    = ti_bulk_out_callback,
 261 };
 262
 263 static struct usb_serial_driver * const serial_drivers[] = {
 264         &ti_1port_device, &ti_2port_device, NULL
 265 };
 266
 267 /* Module */
 268
 269 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 270 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 271 MODULE_LICENSE("GPL");
 272
 273 /*(DEBLOBBED)*/
 274
 275 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 276 MODULE_PARM_DESC(closing_wait,
 277     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 278
 279 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 280
 281 module_usb_serial_driver(serial_drivers, ti_id_table_combined);
 282
 283 /* Functions */
 284
 285 static int ti_startup(struct usb_serial *serial)
 286 {
 287         struct ti_device *tdev;
 288         struct usb_device *dev = serial->dev;
 289         int status;
 290
 291         dev_dbg(&dev->dev,
 292                 "%s - product 0x%4X, num configurations %d, configuration value %d\n",
 293                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 294                 dev->descriptor.bNumConfigurations,
 295                 dev->actconfig->desc.bConfigurationValue);
 296
 297         /* create device structure */
 298         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 299         if (!tdev)
 300                 return -ENOMEM;
 301
 302         mutex_init(&tdev->td_open_close_lock);
 303         tdev->td_serial = serial;
 304         usb_set_serial_data(serial, tdev);
 305
 306         /* determine device type */
 307         if (serial->type == &ti_1port_device)
 308                 tdev->td_is_3410 = 1;
 309         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 310                 tdev->td_is_3410 ? "3410" : "5052");
 311
 312         /* if we have only 1 configuration, download firmware */
 313         if (dev->descriptor.bNumConfigurations == 1) {
 314                 status = ti_download_firmware(tdev);
 315
 316                 if (status != 0)
 317                         goto free_tdev;
 318
 319                 /* 3410 must be reset, 5052 resets itself */
 320                 if (tdev->td_is_3410) {
 321                         msleep_interruptible(100);
 322                         usb_reset_device(dev);
 323                 }
 324
 325                 status = -ENODEV;
 326                 goto free_tdev;
 327         }
 328
 329         /* the second configuration must be set */
 330         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 331                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 332                 status = status ? status : -ENODEV;
 333                 goto free_tdev;
 334         }
 335
 336         if (serial->num_bulk_in < serial->num_ports ||
 337                         serial->num_bulk_out < serial->num_ports) {
 338                 dev_err(&serial->interface->dev, "missing endpoints\n");
 339                 status = -ENODEV;
 340                 goto free_tdev;
 341         }
 342
 343         return 0;
 344
 345 free_tdev:
 346         kfree(tdev);
 347         usb_set_serial_data(serial, NULL);
 348         return status;
 349 }
 350
 351
 352 static void ti_release(struct usb_serial *serial)
 353 {
 354         struct ti_device *tdev = usb_get_serial_data(serial);
 355
 356         kfree(tdev);
 357 }
 358
 359 static int ti_port_probe(struct usb_serial_port *port)
 360 {
 361         struct ti_port *tport;
 362
 363         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 364         if (!tport)
 365                 return -ENOMEM;
 366
 367         spin_lock_init(&tport->tp_lock);
 368         if (port == port->serial->port[0])
 369                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 370         else
 371                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 372         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 373         tport->tp_port = port;
 374         tport->tp_tdev = usb_get_serial_data(port->serial);
 375         tport->tp_uart_mode = 0;        /* default is RS232 */
 376
 377         usb_set_serial_port_data(port, tport);
 378
 379         port->port.drain_delay = 3;
 380
 381         return 0;
 382 }
 383
 384 static int ti_port_remove(struct usb_serial_port *port)
 385 {
 386         struct ti_port *tport;
 387
 388         tport = usb_get_serial_port_data(port);
 389         kfree(tport);
 390
 391         return 0;
 392 }
 393
 394 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 395 {
 396         struct ti_port *tport = usb_get_serial_port_data(port);
 397         struct ti_device *tdev;
 398         struct usb_device *dev;
 399         struct urb *urb;
 400         int port_number;
 401         int status;
 402         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 403                              TI_PIPE_TIMEOUT_ENABLE |
 404                              (TI_TRANSFER_TIMEOUT << 2));
 405
 406         if (tport == NULL)
 407                 return -ENODEV;
 408
 409         dev = port->serial->dev;
 410         tdev = tport->tp_tdev;
 411
 412         /* only one open on any port on a device at a time */
 413         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 414                 return -ERESTARTSYS;
 415
 416         port_number = port->port_number;
 417
 418         tport->tp_msr = 0;
 419         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 420
 421         /* start interrupt urb the first time a port is opened on this device */
 422         if (tdev->td_open_port_count == 0) {
 423                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 424                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 425                 if (!urb) {
 426                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 427                         status = -EINVAL;
 428                         goto release_lock;
 429                 }
 430                 urb->context = tdev;
 431                 status = usb_submit_urb(urb, GFP_KERNEL);
 432                 if (status) {
 433                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 434                         goto release_lock;
 435                 }
 436         }
 437
 438         if (tty)
 439                 ti_set_termios(tty, port, &tty->termios);
 440
 441         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 442         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 443                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 444         if (status) {
 445                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 446                         __func__, status);
 447                 goto unlink_int_urb;
 448         }
 449
 450         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 451         status = ti_command_out_sync(tdev, TI_START_PORT,
 452                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 453         if (status) {
 454                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 455                                                         __func__, status);
 456                 goto unlink_int_urb;
 457         }
 458
 459         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 460         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 461                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 462         if (status) {
 463                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 464                                                         __func__, status);
 465                 goto unlink_int_urb;
 466         }
 467         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 468                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 469         if (status) {
 470                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 471                                                         __func__, status);
 472                 goto unlink_int_urb;
 473         }
 474
 475         /* reset the data toggle on the bulk endpoints to work around bug in
 476          * host controllers where things get out of sync some times */
 477         usb_clear_halt(dev, port->write_urb->pipe);
 478         usb_clear_halt(dev, port->read_urb->pipe);
 479
 480         if (tty)
 481                 ti_set_termios(tty, port, &tty->termios);
 482
 483         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 484         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 485                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 486         if (status) {
 487                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 488                                                         __func__, status);
 489                 goto unlink_int_urb;
 490         }
 491
 492         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 493         status = ti_command_out_sync(tdev, TI_START_PORT,
 494                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 495         if (status) {
 496                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 497                                                         __func__, status);
 498                 goto unlink_int_urb;
 499         }
 500
 501         /* start read urb */
 502         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 503         urb = port->read_urb;
 504         if (!urb) {
 505                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 506                 status = -EINVAL;
 507                 goto unlink_int_urb;
 508         }
 509         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 510         urb->context = tport;
 511         status = usb_submit_urb(urb, GFP_KERNEL);
 512         if (status) {
 513                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 514                                                         __func__, status);
 515                 goto unlink_int_urb;
 516         }
 517
 518         tport->tp_is_open = 1;
 519         ++tdev->td_open_port_count;
 520
 521         goto release_lock;
 522
 523 unlink_int_urb:
 524         if (tdev->td_open_port_count == 0)
 525                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 526 release_lock:
 527         mutex_unlock(&tdev->td_open_close_lock);
 528         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 529         return status;
 530 }
 531
 532
 533 static void ti_close(struct usb_serial_port *port)
 534 {
 535         struct ti_device *tdev;
 536         struct ti_port *tport;
 537         int port_number;
 538         int status;
 539         unsigned long flags;
 540
 541         tdev = usb_get_serial_data(port->serial);
 542         tport = usb_get_serial_port_data(port);
 543         if (tdev == NULL || tport == NULL)
 544                 return;
 545
 546         tport->tp_is_open = 0;
 547
 548         usb_kill_urb(port->read_urb);
 549         usb_kill_urb(port->write_urb);
 550         tport->tp_write_urb_in_use = 0;
 551         spin_lock_irqsave(&tport->tp_lock, flags);
 552         kfifo_reset_out(&port->write_fifo);
 553         spin_unlock_irqrestore(&tport->tp_lock, flags);
 554
 555         port_number = port->port_number;
 556
 557         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 558         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 559                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 560         if (status)
 561                 dev_err(&port->dev,
 562                         "%s - cannot send close port command, %d\n"
 563                                                         , __func__, status);
 564
 565         mutex_lock(&tdev->td_open_close_lock);
 566         --tport->tp_tdev->td_open_port_count;
 567         if (tport->tp_tdev->td_open_port_count == 0) {
 568                 /* last port is closed, shut down interrupt urb */
 569                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 570         }
 571         mutex_unlock(&tdev->td_open_close_lock);
 572 }
 573
 574
 575 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 576                         const unsigned char *data, int count)
 577 {
 578         struct ti_port *tport = usb_get_serial_port_data(port);
 579
 580         if (count == 0) {
 581                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 582                 return 0;
 583         }
 584
 585         if (tport == NULL || !tport->tp_is_open)
 586                 return -ENODEV;
 587
 588         count = kfifo_in_locked(&port->write_fifo, data, count,
 589                                                         &tport->tp_lock);
 590         ti_send(tport);
 591
 592         return count;
 593 }
 594
 595
 596 static int ti_write_room(struct tty_struct *tty)
 597 {
 598         struct usb_serial_port *port = tty->driver_data;
 599         struct ti_port *tport = usb_get_serial_port_data(port);
 600         int room = 0;
 601         unsigned long flags;
 602
 603         if (tport == NULL)
 604                 return 0;
 605
 606         spin_lock_irqsave(&tport->tp_lock, flags);
 607         room = kfifo_avail(&port->write_fifo);
 608         spin_unlock_irqrestore(&tport->tp_lock, flags);
 609
 610         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 611         return room;
 612 }
 613
 614
 615 static int ti_chars_in_buffer(struct tty_struct *tty)
 616 {
 617         struct usb_serial_port *port = tty->driver_data;
 618         struct ti_port *tport = usb_get_serial_port_data(port);
 619         int chars = 0;
 620         unsigned long flags;
 621
 622         if (tport == NULL)
 623                 return 0;
 624
 625         spin_lock_irqsave(&tport->tp_lock, flags);
 626         chars = kfifo_len(&port->write_fifo);
 627         spin_unlock_irqrestore(&tport->tp_lock, flags);
 628
 629         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 630         return chars;
 631 }
 632
 633 static bool ti_tx_empty(struct usb_serial_port *port)
 634 {
 635         struct ti_port *tport = usb_get_serial_port_data(port);
 636         int ret;
 637         u8 lsr;
 638
 639         ret = ti_get_lsr(tport, &lsr);
 640         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 641                 return false;
 642
 643         return true;
 644 }
 645
 646 static void ti_throttle(struct tty_struct *tty)
 647 {
 648         struct usb_serial_port *port = tty->driver_data;
 649         struct ti_port *tport = usb_get_serial_port_data(port);
 650
 651         if (tport == NULL)
 652                 return;
 653
 654         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 655                 ti_stop_read(tport, tty);
 656
 657 }
 658
 659
 660 static void ti_unthrottle(struct tty_struct *tty)
 661 {
 662         struct usb_serial_port *port = tty->driver_data;
 663         struct ti_port *tport = usb_get_serial_port_data(port);
 664         int status;
 665
 666         if (tport == NULL)
 667                 return;
 668
 669         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 670                 status = ti_restart_read(tport, tty);
 671                 if (status)
 672                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 673                                                         __func__, status);
 674         }
 675 }
 676
 677 static int ti_ioctl(struct tty_struct *tty,
 678         unsigned int cmd, unsigned long arg)
 679 {
 680         struct usb_serial_port *port = tty->driver_data;
 681         struct ti_port *tport = usb_get_serial_port_data(port);
 682
 683         if (tport == NULL)
 684                 return -ENODEV;
 685
 686         switch (cmd) {
 687         case TIOCGSERIAL:
 688                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 689                 return ti_get_serial_info(tport,
 690                                 (struct serial_struct __user *)arg);
 691         case TIOCSSERIAL:
 692                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 693                 return ti_set_serial_info(tty, tport,
 694                                 (struct serial_struct __user *)arg);
 695         }
 696         return -ENOIOCTLCMD;
 697 }
 698
 699
 700 static void ti_set_termios(struct tty_struct *tty,
 701                 struct usb_serial_port *port, struct ktermios *old_termios)
 702 {
 703         struct ti_port *tport = usb_get_serial_port_data(port);
 704         struct ti_uart_config *config;
 705         tcflag_t cflag, iflag;
 706         int baud;
 707         int status;
 708         int port_number = port->port_number;
 709         unsigned int mcr;
 710
 711         cflag = tty->termios.c_cflag;
 712         iflag = tty->termios.c_iflag;
 713
 714         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 715         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 716                 old_termios->c_cflag, old_termios->c_iflag);
 717
 718         if (tport == NULL)
 719                 return;
 720
 721         config = kmalloc(sizeof(*config), GFP_KERNEL);
 722         if (!config)
 723                 return;
 724
 725         config->wFlags = 0;
 726
 727         /* these flags must be set */
 728         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 729         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 730         config->bUartMode = (__u8)(tport->tp_uart_mode);
 731
 732         switch (cflag & CSIZE) {
 733         case CS5:
 734                     config->bDataBits = TI_UART_5_DATA_BITS;
 735                     break;
 736         case CS6:
 737                     config->bDataBits = TI_UART_6_DATA_BITS;
 738                     break;
 739         case CS7:
 740                     config->bDataBits = TI_UART_7_DATA_BITS;
 741                     break;
 742         default:
 743         case CS8:
 744                     config->bDataBits = TI_UART_8_DATA_BITS;
 745                     break;
 746         }
 747
 748         /* CMSPAR isn't supported by this driver */
 749         tty->termios.c_cflag &= ~CMSPAR;
 750
 751         if (cflag & PARENB) {
 752                 if (cflag & PARODD) {
 753                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 754                         config->bParity = TI_UART_ODD_PARITY;
 755                 } else {
 756                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 757                         config->bParity = TI_UART_EVEN_PARITY;
 758                 }
 759         } else {
 760                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 761                 config->bParity = TI_UART_NO_PARITY;
 762         }
 763
 764         if (cflag & CSTOPB)
 765                 config->bStopBits = TI_UART_2_STOP_BITS;
 766         else
 767                 config->bStopBits = TI_UART_1_STOP_BITS;
 768
 769         if (cflag & CRTSCTS) {
 770                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 771                 if ((cflag & CBAUD) != B0)
 772                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 773                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 774         } else {
 775                 ti_restart_read(tport, tty);
 776         }
 777
 778         if (I_IXOFF(tty) || I_IXON(tty)) {
 779                 config->cXon  = START_CHAR(tty);
 780                 config->cXoff = STOP_CHAR(tty);
 781
 782                 if (I_IXOFF(tty))
 783                         config->wFlags |= TI_UART_ENABLE_X_IN;
 784                 else
 785                         ti_restart_read(tport, tty);
 786
 787                 if (I_IXON(tty))
 788                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 789         }
 790
 791         baud = tty_get_baud_rate(tty);
 792         if (!baud)
 793                 baud = 9600;
 794         if (tport->tp_tdev->td_is_3410)
 795                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 796         else
 797                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 798
 799         /* FIXME: Should calculate resulting baud here and report it back */
 800         if ((cflag & CBAUD) != B0)
 801                 tty_encode_baud_rate(tty, baud, baud);
 802
 803         dev_dbg(&port->dev,
 804                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d\n",
 805                 __func__, baud, config->wBaudRate, config->wFlags,
 806                 config->bDataBits, config->bParity, config->bStopBits,
 807                 config->cXon, config->cXoff, config->bUartMode);
 808
 809         cpu_to_be16s(&config->wBaudRate);
 810         cpu_to_be16s(&config->wFlags);
 811
 812         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 813                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 814                 sizeof(*config));
 815         if (status)
 816                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 817                                         __func__, port_number, status);
 818
 819         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 820         mcr = tport->tp_shadow_mcr;
 821         /* if baud rate is B0, clear RTS and DTR */
 822         if ((cflag & CBAUD) == B0)
 823                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 824         status = ti_set_mcr(tport, mcr);
 825         if (status)
 826                 dev_err(&port->dev,
 827                         "%s - cannot set modem control on port %d, %d\n",
 828                                                 __func__, port_number, status);
 829
 830         kfree(config);
 831 }
 832
 833
 834 static int ti_tiocmget(struct tty_struct *tty)
 835 {
 836         struct usb_serial_port *port = tty->driver_data;
 837         struct ti_port *tport = usb_get_serial_port_data(port);
 838         unsigned int result;
 839         unsigned int msr;
 840         unsigned int mcr;
 841         unsigned long flags;
 842
 843         if (tport == NULL)
 844                 return -ENODEV;
 845
 846         spin_lock_irqsave(&tport->tp_lock, flags);
 847         msr = tport->tp_msr;
 848         mcr = tport->tp_shadow_mcr;
 849         spin_unlock_irqrestore(&tport->tp_lock, flags);
 850
 851         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 852                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 853                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 854                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 855                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 856                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 857                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 858
 859         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 860
 861         return result;
 862 }
 863
 864
 865 static int ti_tiocmset(struct tty_struct *tty,
 866                                 unsigned int set, unsigned int clear)
 867 {
 868         struct usb_serial_port *port = tty->driver_data;
 869         struct ti_port *tport = usb_get_serial_port_data(port);
 870         unsigned int mcr;
 871         unsigned long flags;
 872
 873         if (tport == NULL)
 874                 return -ENODEV;
 875
 876         spin_lock_irqsave(&tport->tp_lock, flags);
 877         mcr = tport->tp_shadow_mcr;
 878
 879         if (set & TIOCM_RTS)
 880                 mcr |= TI_MCR_RTS;
 881         if (set & TIOCM_DTR)
 882                 mcr |= TI_MCR_DTR;
 883         if (set & TIOCM_LOOP)
 884                 mcr |= TI_MCR_LOOP;
 885
 886         if (clear & TIOCM_RTS)
 887                 mcr &= ~TI_MCR_RTS;
 888         if (clear & TIOCM_DTR)
 889                 mcr &= ~TI_MCR_DTR;
 890         if (clear & TIOCM_LOOP)
 891                 mcr &= ~TI_MCR_LOOP;
 892         spin_unlock_irqrestore(&tport->tp_lock, flags);
 893
 894         return ti_set_mcr(tport, mcr);
 895 }
 896
 897
 898 static void ti_break(struct tty_struct *tty, int break_state)
 899 {
 900         struct usb_serial_port *port = tty->driver_data;
 901         struct ti_port *tport = usb_get_serial_port_data(port);
 902         int status;
 903
 904         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 905
 906         if (tport == NULL)
 907                 return;
 908
 909         status = ti_write_byte(port, tport->tp_tdev,
 910                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 911                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 912
 913         if (status)
 914                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 915 }
 916
 917
 918 static void ti_interrupt_callback(struct urb *urb)
 919 {
 920         struct ti_device *tdev = urb->context;
 921         struct usb_serial_port *port;
 922         struct usb_serial *serial = tdev->td_serial;
 923         struct ti_port *tport;
 924         struct device *dev = &urb->dev->dev;
 925         unsigned char *data = urb->transfer_buffer;
 926         int length = urb->actual_length;
 927         int port_number;
 928         int function;
 929         int status = urb->status;
 930         int retval;
 931         __u8 msr;
 932
 933         switch (status) {
 934         case 0:
 935                 break;
 936         case -ECONNRESET:
 937         case -ENOENT:
 938         case -ESHUTDOWN:
 939                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
 940                 tdev->td_urb_error = 1;
 941                 return;
 942         default:
 943                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
 944                 tdev->td_urb_error = 1;
 945                 goto exit;
 946         }
 947
 948         if (length != 2) {
 949                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
 950                 goto exit;
 951         }
 952
 953         if (data[0] == TI_CODE_HARDWARE_ERROR) {
 954                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
 955                 goto exit;
 956         }
 957
 958         port_number = TI_GET_PORT_FROM_CODE(data[0]);
 959         function = TI_GET_FUNC_FROM_CODE(data[0]);
 960
 961         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
 962                 __func__, port_number, function, data[1]);
 963
 964         if (port_number >= serial->num_ports) {
 965                 dev_err(dev, "%s - bad port number, %d\n",
 966                                                 __func__, port_number);
 967                 goto exit;
 968         }
 969
 970         port = serial->port[port_number];
 971
 972         tport = usb_get_serial_port_data(port);
 973         if (!tport)
 974                 goto exit;
 975
 976         switch (function) {
 977         case TI_CODE_DATA_ERROR:
 978                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
 979                         __func__, port_number, data[1]);
 980                 break;
 981
 982         case TI_CODE_MODEM_STATUS:
 983                 msr = data[1];
 984                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
 985                 ti_handle_new_msr(tport, msr);
 986                 break;
 987
 988         default:
 989                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
 990                                                         __func__, data[1]);
 991                 break;
 992         }
 993
 994 exit:
 995         retval = usb_submit_urb(urb, GFP_ATOMIC);
 996         if (retval)
 997                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
 998                         __func__, retval);
 999 }
1000
1001
1002 static void ti_bulk_in_callback(struct urb *urb)
1003 {
1004         struct ti_port *tport = urb->context;
1005         struct usb_serial_port *port = tport->tp_port;
1006         struct device *dev = &urb->dev->dev;
1007         int status = urb->status;
1008         int retval = 0;
1009
1010         switch (status) {
1011         case 0:
1012                 break;
1013         case -ECONNRESET:
1014         case -ENOENT:
1015         case -ESHUTDOWN:
1016                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1017                 tport->tp_tdev->td_urb_error = 1;
1018                 return;
1019         default:
1020                 dev_err(dev, "%s - nonzero urb status, %d\n",
1021                         __func__, status);
1022                 tport->tp_tdev->td_urb_error = 1;
1023         }
1024
1025         if (status == -EPIPE)
1026                 goto exit;
1027
1028         if (status) {
1029                 dev_err(dev, "%s - stopping read!\n", __func__);
1030                 return;
1031         }
1032
1033         if (urb->actual_length) {
1034                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1035                                       urb->transfer_buffer);
1036
1037                 if (!tport->tp_is_open)
1038                         dev_dbg(dev, "%s - port closed, dropping data\n",
1039                                 __func__);
1040                 else
1041                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1042                 spin_lock(&tport->tp_lock);
1043                 port->icount.rx += urb->actual_length;
1044                 spin_unlock(&tport->tp_lock);
1045         }
1046
1047 exit:
1048         /* continue to read unless stopping */
1049         spin_lock(&tport->tp_lock);
1050         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1051                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1052         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1053                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1054
1055         spin_unlock(&tport->tp_lock);
1056         if (retval)
1057                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1058                         __func__, retval);
1059 }
1060
1061
1062 static void ti_bulk_out_callback(struct urb *urb)
1063 {
1064         struct ti_port *tport = urb->context;
1065         struct usb_serial_port *port = tport->tp_port;
1066         int status = urb->status;
1067
1068         tport->tp_write_urb_in_use = 0;
1069
1070         switch (status) {
1071         case 0:
1072                 break;
1073         case -ECONNRESET:
1074         case -ENOENT:
1075         case -ESHUTDOWN:
1076                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1077                 tport->tp_tdev->td_urb_error = 1;
1078                 return;
1079         default:
1080                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1081                         __func__, status);
1082                 tport->tp_tdev->td_urb_error = 1;
1083         }
1084
1085         /* send any buffered data */
1086         ti_send(tport);
1087 }
1088
1089
1090 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1091                 int length)
1092 {
1093         int cnt;
1094
1095         do {
1096                 cnt = tty_insert_flip_string(&port->port, data, length);
1097                 if (cnt < length) {
1098                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1099                                                 __func__, length - cnt);
1100                         if (cnt == 0)
1101                                 break;
1102                 }
1103                 tty_flip_buffer_push(&port->port);
1104                 data += cnt;
1105                 length -= cnt;
1106         } while (length > 0);
1107 }
1108
1109
1110 static void ti_send(struct ti_port *tport)
1111 {
1112         int count, result;
1113         struct usb_serial_port *port = tport->tp_port;
1114         unsigned long flags;
1115
1116         spin_lock_irqsave(&tport->tp_lock, flags);
1117
1118         if (tport->tp_write_urb_in_use)
1119                 goto unlock;
1120
1121         count = kfifo_out(&port->write_fifo,
1122                                 port->write_urb->transfer_buffer,
1123                                 port->bulk_out_size);
1124
1125         if (count == 0)
1126                 goto unlock;
1127
1128         tport->tp_write_urb_in_use = 1;
1129
1130         spin_unlock_irqrestore(&tport->tp_lock, flags);
1131
1132         usb_serial_debug_data(&port->dev, __func__, count,
1133                               port->write_urb->transfer_buffer);
1134
1135         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1136                            usb_sndbulkpipe(port->serial->dev,
1137                                             port->bulk_out_endpointAddress),
1138                            port->write_urb->transfer_buffer, count,
1139                            ti_bulk_out_callback, tport);
1140
1141         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1142         if (result) {
1143                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1144                                                         __func__, result);
1145                 tport->tp_write_urb_in_use = 0;
1146                 /* TODO: reschedule ti_send */
1147         } else {
1148                 spin_lock_irqsave(&tport->tp_lock, flags);
1149                 port->icount.tx += count;
1150                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1151         }
1152
1153         /* more room in the buffer for new writes, wakeup */
1154         tty_port_tty_wakeup(&port->port);
1155
1156         return;
1157 unlock:
1158         spin_unlock_irqrestore(&tport->tp_lock, flags);
1159         return;
1160 }
1161
1162
1163 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1164 {
1165         unsigned long flags;
1166         int status;
1167
1168         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1169                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1170                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1171
1172         spin_lock_irqsave(&tport->tp_lock, flags);
1173         if (!status)
1174                 tport->tp_shadow_mcr = mcr;
1175         spin_unlock_irqrestore(&tport->tp_lock, flags);
1176
1177         return status;
1178 }
1179
1180
1181 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1182 {
1183         int size, status;
1184         struct ti_device *tdev = tport->tp_tdev;
1185         struct usb_serial_port *port = tport->tp_port;
1186         int port_number = port->port_number;
1187         struct ti_port_status *data;
1188
1189         size = sizeof(struct ti_port_status);
1190         data = kmalloc(size, GFP_KERNEL);
1191         if (!data)
1192                 return -ENOMEM;
1193
1194         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1195                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1196         if (status) {
1197                 dev_err(&port->dev,
1198                         "%s - get port status command failed, %d\n",
1199                                                         __func__, status);
1200                 goto free_data;
1201         }
1202
1203         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1204
1205         *lsr = data->bLSR;
1206
1207 free_data:
1208         kfree(data);
1209         return status;
1210 }
1211
1212
1213 static int ti_get_serial_info(struct ti_port *tport,
1214         struct serial_struct __user *ret_arg)
1215 {
1216         struct usb_serial_port *port = tport->tp_port;
1217         struct serial_struct ret_serial;
1218         unsigned cwait;
1219
1220         if (!ret_arg)
1221                 return -EFAULT;
1222
1223         cwait = port->port.closing_wait;
1224         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1225                 cwait = jiffies_to_msecs(cwait) / 10;
1226
1227         memset(&ret_serial, 0, sizeof(ret_serial));
1228
1229         ret_serial.type = PORT_16550A;
1230         ret_serial.line = port->minor;
1231         ret_serial.port = port->port_number;
1232         ret_serial.flags = tport->tp_flags;
1233         ret_serial.xmit_fifo_size = kfifo_size(&port->write_fifo);
1234         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1235         ret_serial.closing_wait = cwait;
1236
1237         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1238                 return -EFAULT;
1239
1240         return 0;
1241 }
1242
1243
1244 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1245         struct serial_struct __user *new_arg)
1246 {
1247         struct serial_struct new_serial;
1248         unsigned cwait;
1249
1250         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1251                 return -EFAULT;
1252
1253         cwait = new_serial.closing_wait;
1254         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1255                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1256
1257         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1258         tport->tp_port->port.closing_wait = cwait;
1259
1260         return 0;
1261 }
1262
1263
1264 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1265 {
1266         struct async_icount *icount;
1267         struct tty_struct *tty;
1268         unsigned long flags;
1269
1270         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1271
1272         if (msr & TI_MSR_DELTA_MASK) {
1273                 spin_lock_irqsave(&tport->tp_lock, flags);
1274                 icount = &tport->tp_port->icount;
1275                 if (msr & TI_MSR_DELTA_CTS)
1276                         icount->cts++;
1277                 if (msr & TI_MSR_DELTA_DSR)
1278                         icount->dsr++;
1279                 if (msr & TI_MSR_DELTA_CD)
1280                         icount->dcd++;
1281                 if (msr & TI_MSR_DELTA_RI)
1282                         icount->rng++;
1283                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1284                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1285         }
1286
1287         tport->tp_msr = msr & TI_MSR_MASK;
1288
1289         /* handle CTS flow control */
1290         tty = tty_port_tty_get(&tport->tp_port->port);
1291         if (tty && C_CRTSCTS(tty)) {
1292                 if (msr & TI_MSR_CTS)
1293                         tty_wakeup(tty);
1294         }
1295         tty_kref_put(tty);
1296 }
1297
1298
1299 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1300 {
1301         unsigned long flags;
1302
1303         spin_lock_irqsave(&tport->tp_lock, flags);
1304
1305         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1306                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1307
1308         spin_unlock_irqrestore(&tport->tp_lock, flags);
1309 }
1310
1311
1312 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1313 {
1314         struct urb *urb;
1315         int status = 0;
1316         unsigned long flags;
1317
1318         spin_lock_irqsave(&tport->tp_lock, flags);
1319
1320         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1321                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1322                 urb = tport->tp_port->read_urb;
1323                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1324                 urb->context = tport;
1325                 status = usb_submit_urb(urb, GFP_KERNEL);
1326         } else  {
1327                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1328                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1329         }
1330
1331         return status;
1332 }
1333
1334
1335 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1336         __u16 moduleid, __u16 value, __u8 *data, int size)
1337 {
1338         int status;
1339
1340         status = usb_control_msg(tdev->td_serial->dev,
1341                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1342                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1343                 value, moduleid, data, size, 1000);
1344
1345         if (status < 0)
1346                 return status;
1347
1348         return 0;
1349 }
1350
1351
1352 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1353         __u16 moduleid, __u16 value, __u8 *data, int size)
1354 {
1355         int status;
1356
1357         status = usb_control_msg(tdev->td_serial->dev,
1358                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1359                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1360                 value, moduleid, data, size, 1000);
1361
1362         if (status == size)
1363                 status = 0;
1364         else if (status >= 0)
1365                 status = -ECOMM;
1366
1367         return status;
1368 }
1369
1370
1371 static int ti_write_byte(struct usb_serial_port *port,
1372                         struct ti_device *tdev, unsigned long addr,
1373                         __u8 mask, __u8 byte)
1374 {
1375         int status;
1376         unsigned int size;
1377         struct ti_write_data_bytes *data;
1378
1379         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1380                 addr, mask, byte);
1381
1382         size = sizeof(struct ti_write_data_bytes) + 2;
1383         data = kmalloc(size, GFP_KERNEL);
1384         if (!data)
1385                 return -ENOMEM;
1386
1387         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1388         data->bDataType = TI_RW_DATA_BYTE;
1389         data->bDataCounter = 1;
1390         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1391         data->wBaseAddrLo = cpu_to_be16(addr);
1392         data->bData[0] = mask;
1393         data->bData[1] = byte;
1394
1395         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1396                 (__u8 *)data, size);
1397
1398         if (status < 0)
1399                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1400
1401         kfree(data);
1402
1403         return status;
1404 }
1405
1406 static int ti_do_download(struct usb_device *dev, int pipe,
1407                                                 u8 *buffer, int size)
1408 {
1409         int pos;
1410         u8 cs = 0;
1411         int done;
1412         struct ti_firmware_header *header;
1413         int status = 0;
1414         int len;
1415
1416         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1417                 cs = (__u8)(cs + buffer[pos]);
1418
1419         header = (struct ti_firmware_header *)buffer;
1420         header->wLength = cpu_to_le16((__u16)(size
1421                                         - sizeof(struct ti_firmware_header)));
1422         header->bCheckSum = cs;
1423
1424         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1425         for (pos = 0; pos < size; pos += done) {
1426                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1427                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1428                                                                 &done, 1000);
1429                 if (status)
1430                         break;
1431         }
1432         return status;
1433 }
1434
1435 static int ti_download_firmware(struct ti_device *tdev)
1436 {
1437         int status;
1438         int buffer_size;
1439         __u8 *buffer;
1440         struct usb_device *dev = tdev->td_serial->dev;
1441         unsigned int pipe = usb_sndbulkpipe(dev,
1442                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1443         const struct firmware *fw_p;
1444         char buf[32];
1445
1446         /* try ID specific firmware first, then try generic firmware */
1447         sprintf(buf, "/*(DEBLOBBED)*/",
1448                         le16_to_cpu(dev->descriptor.idVendor),
1449                         le16_to_cpu(dev->descriptor.idProduct));
1450         status = reject_firmware(&fw_p, buf, &dev->dev);
1451
1452         if (status != 0) {
1453                 buf[0] = '\0';
1454                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1455                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1456                         case MTS_CDMA_PRODUCT_ID:
1457                                 strcpy(buf, "/*(DEBLOBBED)*/");
1458                                 break;
1459                         case MTS_GSM_PRODUCT_ID:
1460                                 strcpy(buf, "/*(DEBLOBBED)*/");
1461                                 break;
1462                         case MTS_EDGE_PRODUCT_ID:
1463                                 strcpy(buf, "/*(DEBLOBBED)*/");
1464                                 break;
1465                         case MTS_MT9234MU_PRODUCT_ID:
1466                                 strcpy(buf, "/*(DEBLOBBED)*/");
1467                                 break;
1468                         case MTS_MT9234ZBA_PRODUCT_ID:
1469                                 strcpy(buf, "/*(DEBLOBBED)*/");
1470                                 break;
1471                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1472                                 strcpy(buf, "/*(DEBLOBBED)*/");
1473                                 break;                  }
1474                 }
1475                 if (buf[0] == '\0') {
1476                         if (tdev->td_is_3410)
1477                                 strcpy(buf, "/*(DEBLOBBED)*/");
1478                         else
1479                                 strcpy(buf, "/*(DEBLOBBED)*/");
1480                 }
1481                 status = reject_firmware(&fw_p, buf, &dev->dev);
1482         }
1483         if (status) {
1484                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1485                 return -ENOENT;
1486         }
1487         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1488                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1489                 release_firmware(fw_p);
1490                 return -ENOENT;
1491         }
1492
1493         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1494         buffer = kmalloc(buffer_size, GFP_KERNEL);
1495         if (buffer) {
1496                 memcpy(buffer, fw_p->data, fw_p->size);
1497                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1498                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1499                 kfree(buffer);
1500         } else {
1501                 status = -ENOMEM;
1502         }
1503         release_firmware(fw_p);
1504         if (status) {
1505                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1506                                                         __func__, status);
1507                 return status;
1508         }
1509
1510         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1511
1512         return 0;
1513 }