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_shadow_mcr;
  71         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  72         unsigned int            tp_uart_base_addr;
  73         int                     tp_flags;
  74         wait_queue_head_t       tp_write_wait;
  75         struct ti_device        *tp_tdev;
  76         struct usb_serial_port  *tp_port;
  77         spinlock_t              tp_lock;
  78         int                     tp_read_urb_state;
  79         int                     tp_write_urb_in_use;
  80         struct kfifo            write_fifo;
  81 };
  82
  83 struct ti_device {
  84         struct mutex            td_open_close_lock;
  85         int                     td_open_port_count;
  86         struct usb_serial       *td_serial;
  87         int                     td_is_3410;
  88         int                     td_urb_error;
  89 };
  90
  91
  92 /* Function Declarations */
  93
  94 static int ti_startup(struct usb_serial *serial);
  95 static void ti_release(struct usb_serial *serial);
  96 static int ti_port_probe(struct usb_serial_port *port);
  97 static int ti_port_remove(struct usb_serial_port *port);
  98 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
  99 static void ti_close(struct usb_serial_port *port);
 100 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 101                 const unsigned char *data, int count);
 102 static int ti_write_room(struct tty_struct *tty);
 103 static int ti_chars_in_buffer(struct tty_struct *tty);
 104 static bool ti_tx_empty(struct usb_serial_port *port);
 105 static void ti_throttle(struct tty_struct *tty);
 106 static void ti_unthrottle(struct tty_struct *tty);
 107 static int ti_ioctl(struct tty_struct *tty,
 108                 unsigned int cmd, unsigned long arg);
 109 static void ti_set_termios(struct tty_struct *tty,
 110                 struct usb_serial_port *port, struct ktermios *old_termios);
 111 static int ti_tiocmget(struct tty_struct *tty);
 112 static int ti_tiocmset(struct tty_struct *tty,
 113                 unsigned int set, unsigned int clear);
 114 static void ti_break(struct tty_struct *tty, int break_state);
 115 static void ti_interrupt_callback(struct urb *urb);
 116 static void ti_bulk_in_callback(struct urb *urb);
 117 static void ti_bulk_out_callback(struct urb *urb);
 118
 119 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
 120                 int length);
 121 static void ti_send(struct ti_port *tport);
 122 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 123 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
 124 static int ti_get_serial_info(struct ti_port *tport,
 125         struct serial_struct __user *ret_arg);
 126 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 127         struct serial_struct __user *new_arg);
 128 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 129
 130 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 131 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 132
 133 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 134         __u16 moduleid, __u16 value, __u8 *data, int size);
 135 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 136         __u16 moduleid, __u16 value, __u8 *data, int size);
 137
 138 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 139                          unsigned long addr, __u8 mask, __u8 byte);
 140
 141 static int ti_download_firmware(struct ti_device *tdev);
 142
 143
 144 /* Data */
 145
 146 /* module parameters */
 147 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 148 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 149 static unsigned int vendor_3410_count;
 150 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 151 static unsigned int product_3410_count;
 152 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 153 static unsigned int vendor_5052_count;
 154 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 155 static unsigned int product_5052_count;
 156
 157 /* supported devices */
 158 /* the array dimension is the number of default entries plus */
 159 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 160 /* null entry */
 161 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
 162         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 163         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 164         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 165         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 166         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 167         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 168         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 169         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 170         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 172         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 173         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 174         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 175         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
 176         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 177         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 178 };
 179
 180 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 181         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 182         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 183         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 184         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 185 };
 186
 187 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 188         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 190         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 191         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 192         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 193         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 194         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 198         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 199         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 200         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 201         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 202         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 203         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 204         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 205         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 207         { }
 208 };
 209
 210 static struct usb_serial_driver ti_1port_device = {
 211         .driver = {
 212                 .owner          = THIS_MODULE,
 213                 .name           = "ti_usb_3410_5052_1",
 214         },
 215         .description            = "TI USB 3410 1 port adapter",
 216         .id_table               = ti_id_table_3410,
 217         .num_ports              = 1,
 218         .attach                 = ti_startup,
 219         .release                = ti_release,
 220         .port_probe             = ti_port_probe,
 221         .port_remove            = ti_port_remove,
 222         .open                   = ti_open,
 223         .close                  = ti_close,
 224         .write                  = ti_write,
 225         .write_room             = ti_write_room,
 226         .chars_in_buffer        = ti_chars_in_buffer,
 227         .tx_empty               = ti_tx_empty,
 228         .throttle               = ti_throttle,
 229         .unthrottle             = ti_unthrottle,
 230         .ioctl                  = ti_ioctl,
 231         .set_termios            = ti_set_termios,
 232         .tiocmget               = ti_tiocmget,
 233         .tiocmset               = ti_tiocmset,
 234         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 235         .get_icount             = usb_serial_generic_get_icount,
 236         .break_ctl              = ti_break,
 237         .read_int_callback      = ti_interrupt_callback,
 238         .read_bulk_callback     = ti_bulk_in_callback,
 239         .write_bulk_callback    = ti_bulk_out_callback,
 240 };
 241
 242 static struct usb_serial_driver ti_2port_device = {
 243         .driver = {
 244                 .owner          = THIS_MODULE,
 245                 .name           = "ti_usb_3410_5052_2",
 246         },
 247         .description            = "TI USB 5052 2 port adapter",
 248         .id_table               = ti_id_table_5052,
 249         .num_ports              = 2,
 250         .attach                 = ti_startup,
 251         .release                = ti_release,
 252         .port_probe             = ti_port_probe,
 253         .port_remove            = ti_port_remove,
 254         .open                   = ti_open,
 255         .close                  = ti_close,
 256         .write                  = ti_write,
 257         .write_room             = ti_write_room,
 258         .chars_in_buffer        = ti_chars_in_buffer,
 259         .tx_empty               = ti_tx_empty,
 260         .throttle               = ti_throttle,
 261         .unthrottle             = ti_unthrottle,
 262         .ioctl                  = ti_ioctl,
 263         .set_termios            = ti_set_termios,
 264         .tiocmget               = ti_tiocmget,
 265         .tiocmset               = ti_tiocmset,
 266         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 267         .get_icount             = usb_serial_generic_get_icount,
 268         .break_ctl              = ti_break,
 269         .read_int_callback      = ti_interrupt_callback,
 270         .read_bulk_callback     = ti_bulk_in_callback,
 271         .write_bulk_callback    = ti_bulk_out_callback,
 272 };
 273
 274 static struct usb_serial_driver * const serial_drivers[] = {
 275         &ti_1port_device, &ti_2port_device, NULL
 276 };
 277
 278 /* Module */
 279
 280 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 281 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 282 MODULE_LICENSE("GPL");
 283
 284 MODULE_FIRMWARE("ti_3410.fw");
 285 MODULE_FIRMWARE("ti_5052.fw");
 286 MODULE_FIRMWARE("mts_cdma.fw");
 287 MODULE_FIRMWARE("mts_gsm.fw");
 288 MODULE_FIRMWARE("mts_edge.fw");
 289 MODULE_FIRMWARE("mts_mt9234mu.fw");
 290 MODULE_FIRMWARE("mts_mt9234zba.fw");
 291
 292 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 293 MODULE_PARM_DESC(closing_wait,
 294     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 295
 296 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 297 MODULE_PARM_DESC(vendor_3410,
 298                 "Vendor ids for 3410 based devices, 1-5 short integers");
 299 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 300 MODULE_PARM_DESC(product_3410,
 301                 "Product ids for 3410 based devices, 1-5 short integers");
 302 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 303 MODULE_PARM_DESC(vendor_5052,
 304                 "Vendor ids for 5052 based devices, 1-5 short integers");
 305 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 306 MODULE_PARM_DESC(product_5052,
 307                 "Product ids for 5052 based devices, 1-5 short integers");
 308
 309 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 310
 311
 312 /* Functions */
 313
 314 static int __init ti_init(void)
 315 {
 316         int i, j, c;
 317
 318         /* insert extra vendor and product ids */
 319         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 320         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 321         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 322                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 323                 ti_id_table_3410[j].idProduct = product_3410[i];
 324                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 325                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 326                 ti_id_table_combined[c].idProduct = product_3410[i];
 327                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 328         }
 329         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 330         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 331                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 332                 ti_id_table_5052[j].idProduct = product_5052[i];
 333                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 334                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 335                 ti_id_table_combined[c].idProduct = product_5052[i];
 336                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 337         }
 338
 339         return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 340 }
 341
 342 static void __exit ti_exit(void)
 343 {
 344         usb_serial_deregister_drivers(serial_drivers);
 345 }
 346
 347 module_init(ti_init);
 348 module_exit(ti_exit);
 349
 350
 351 static int ti_startup(struct usb_serial *serial)
 352 {
 353         struct ti_device *tdev;
 354         struct usb_device *dev = serial->dev;
 355         int status;
 356
 357         dev_dbg(&dev->dev,
 358                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 359                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 360                 dev->descriptor.bNumConfigurations,
 361                 dev->actconfig->desc.bConfigurationValue);
 362
 363         /* create device structure */
 364         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 365         if (tdev == NULL) {
 366                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 367                 return -ENOMEM;
 368         }
 369         mutex_init(&tdev->td_open_close_lock);
 370         tdev->td_serial = serial;
 371         usb_set_serial_data(serial, tdev);
 372
 373         /* determine device type */
 374         if (usb_match_id(serial->interface, ti_id_table_3410))
 375                 tdev->td_is_3410 = 1;
 376         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 377                 tdev->td_is_3410 ? "3410" : "5052");
 378
 379         /* if we have only 1 configuration, download firmware */
 380         if (dev->descriptor.bNumConfigurations == 1) {
 381                 status = ti_download_firmware(tdev);
 382
 383                 if (status != 0)
 384                         goto free_tdev;
 385
 386                 /* 3410 must be reset, 5052 resets itself */
 387                 if (tdev->td_is_3410) {
 388                         msleep_interruptible(100);
 389                         usb_reset_device(dev);
 390                 }
 391
 392                 status = -ENODEV;
 393                 goto free_tdev;
 394         }
 395
 396         /* the second configuration must be set */
 397         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 398                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 399                 status = status ? status : -ENODEV;
 400                 goto free_tdev;
 401         }
 402
 403         return 0;
 404
 405 free_tdev:
 406         kfree(tdev);
 407         usb_set_serial_data(serial, NULL);
 408         return status;
 409 }
 410
 411
 412 static void ti_release(struct usb_serial *serial)
 413 {
 414         struct ti_device *tdev = usb_get_serial_data(serial);
 415
 416         kfree(tdev);
 417 }
 418
 419 static int ti_port_probe(struct usb_serial_port *port)
 420 {
 421         struct ti_port *tport;
 422
 423         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 424         if (!tport)
 425                 return -ENOMEM;
 426
 427         spin_lock_init(&tport->tp_lock);
 428         if (port == port->serial->port[0])
 429                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 430         else
 431                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 432         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 433         init_waitqueue_head(&tport->tp_write_wait);
 434         if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
 435                 kfree(tport);
 436                 return -ENOMEM;
 437         }
 438         tport->tp_port = port;
 439         tport->tp_tdev = usb_get_serial_data(port->serial);
 440         tport->tp_uart_mode = 0;        /* default is RS232 */
 441
 442         usb_set_serial_port_data(port, tport);
 443
 444         return 0;
 445 }
 446
 447 static int ti_port_remove(struct usb_serial_port *port)
 448 {
 449         struct ti_port *tport;
 450
 451         tport = usb_get_serial_port_data(port);
 452         kfifo_free(&tport->write_fifo);
 453         kfree(tport);
 454
 455         return 0;
 456 }
 457
 458 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 459 {
 460         struct ti_port *tport = usb_get_serial_port_data(port);
 461         struct ti_device *tdev;
 462         struct usb_device *dev;
 463         struct urb *urb;
 464         int port_number;
 465         int status;
 466         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 467                              TI_PIPE_TIMEOUT_ENABLE |
 468                              (TI_TRANSFER_TIMEOUT << 2));
 469
 470         if (tport == NULL)
 471                 return -ENODEV;
 472
 473         dev = port->serial->dev;
 474         tdev = tport->tp_tdev;
 475
 476         /* only one open on any port on a device at a time */
 477         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 478                 return -ERESTARTSYS;
 479
 480         port_number = port->number - port->serial->minor;
 481
 482         tport->tp_msr = 0;
 483         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 484
 485         /* start interrupt urb the first time a port is opened on this device */
 486         if (tdev->td_open_port_count == 0) {
 487                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 488                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 489                 if (!urb) {
 490                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 491                         status = -EINVAL;
 492                         goto release_lock;
 493                 }
 494                 urb->context = tdev;
 495                 status = usb_submit_urb(urb, GFP_KERNEL);
 496                 if (status) {
 497                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 498                         goto release_lock;
 499                 }
 500         }
 501
 502         if (tty)
 503                 ti_set_termios(tty, port, &tty->termios);
 504
 505         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 506         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 507                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 508         if (status) {
 509                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 510                         __func__, status);
 511                 goto unlink_int_urb;
 512         }
 513
 514         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 515         status = ti_command_out_sync(tdev, TI_START_PORT,
 516                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 517         if (status) {
 518                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 519                                                         __func__, status);
 520                 goto unlink_int_urb;
 521         }
 522
 523         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 524         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 525                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 526         if (status) {
 527                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 528                                                         __func__, status);
 529                 goto unlink_int_urb;
 530         }
 531         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 532                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 533         if (status) {
 534                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 535                                                         __func__, status);
 536                 goto unlink_int_urb;
 537         }
 538
 539         /* reset the data toggle on the bulk endpoints to work around bug in
 540          * host controllers where things get out of sync some times */
 541         usb_clear_halt(dev, port->write_urb->pipe);
 542         usb_clear_halt(dev, port->read_urb->pipe);
 543
 544         if (tty)
 545                 ti_set_termios(tty, port, &tty->termios);
 546
 547         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 548         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 549                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 550         if (status) {
 551                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 552                                                         __func__, status);
 553                 goto unlink_int_urb;
 554         }
 555
 556         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 557         status = ti_command_out_sync(tdev, TI_START_PORT,
 558                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 559         if (status) {
 560                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 561                                                         __func__, status);
 562                 goto unlink_int_urb;
 563         }
 564
 565         /* start read urb */
 566         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 567         urb = port->read_urb;
 568         if (!urb) {
 569                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 570                 status = -EINVAL;
 571                 goto unlink_int_urb;
 572         }
 573         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 574         urb->context = tport;
 575         status = usb_submit_urb(urb, GFP_KERNEL);
 576         if (status) {
 577                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 578                                                         __func__, status);
 579                 goto unlink_int_urb;
 580         }
 581
 582         tport->tp_is_open = 1;
 583         ++tdev->td_open_port_count;
 584
 585         port->port.drain_delay = 3;
 586
 587         goto release_lock;
 588
 589 unlink_int_urb:
 590         if (tdev->td_open_port_count == 0)
 591                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 592 release_lock:
 593         mutex_unlock(&tdev->td_open_close_lock);
 594         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 595         return status;
 596 }
 597
 598
 599 static void ti_close(struct usb_serial_port *port)
 600 {
 601         struct ti_device *tdev;
 602         struct ti_port *tport;
 603         int port_number;
 604         int status;
 605         int do_unlock;
 606         unsigned long flags;
 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         usb_kill_urb(port->read_urb);
 616         usb_kill_urb(port->write_urb);
 617         tport->tp_write_urb_in_use = 0;
 618         spin_lock_irqsave(&tport->tp_lock, flags);
 619         kfifo_reset_out(&tport->write_fifo);
 620         spin_unlock_irqrestore(&tport->tp_lock, flags);
 621
 622         port_number = port->number - port->serial->minor;
 623
 624         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 625         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 626                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 627         if (status)
 628                 dev_err(&port->dev,
 629                         "%s - cannot send close port command, %d\n"
 630                                                         , __func__, status);
 631
 632         /* if mutex_lock is interrupted, continue anyway */
 633         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 634         --tport->tp_tdev->td_open_port_count;
 635         if (tport->tp_tdev->td_open_port_count <= 0) {
 636                 /* last port is closed, shut down interrupt urb */
 637                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 638                 tport->tp_tdev->td_open_port_count = 0;
 639         }
 640         if (do_unlock)
 641                 mutex_unlock(&tdev->td_open_close_lock);
 642 }
 643
 644
 645 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 646                         const unsigned char *data, int count)
 647 {
 648         struct ti_port *tport = usb_get_serial_port_data(port);
 649
 650         if (count == 0) {
 651                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 652                 return 0;
 653         }
 654
 655         if (tport == NULL || !tport->tp_is_open)
 656                 return -ENODEV;
 657
 658         count = kfifo_in_locked(&tport->write_fifo, data, count,
 659                                                         &tport->tp_lock);
 660         ti_send(tport);
 661
 662         return count;
 663 }
 664
 665
 666 static int ti_write_room(struct tty_struct *tty)
 667 {
 668         struct usb_serial_port *port = tty->driver_data;
 669         struct ti_port *tport = usb_get_serial_port_data(port);
 670         int room = 0;
 671         unsigned long flags;
 672
 673         if (tport == NULL)
 674                 return 0;
 675
 676         spin_lock_irqsave(&tport->tp_lock, flags);
 677         room = kfifo_avail(&tport->write_fifo);
 678         spin_unlock_irqrestore(&tport->tp_lock, flags);
 679
 680         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 681         return room;
 682 }
 683
 684
 685 static int ti_chars_in_buffer(struct tty_struct *tty)
 686 {
 687         struct usb_serial_port *port = tty->driver_data;
 688         struct ti_port *tport = usb_get_serial_port_data(port);
 689         int chars = 0;
 690         unsigned long flags;
 691
 692         if (tport == NULL)
 693                 return 0;
 694
 695         spin_lock_irqsave(&tport->tp_lock, flags);
 696         chars = kfifo_len(&tport->write_fifo);
 697         spin_unlock_irqrestore(&tport->tp_lock, flags);
 698
 699         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 700         return chars;
 701 }
 702
 703 static bool ti_tx_empty(struct usb_serial_port *port)
 704 {
 705         struct ti_port *tport = usb_get_serial_port_data(port);
 706         int ret;
 707         u8 lsr;
 708
 709         ret = ti_get_lsr(tport, &lsr);
 710         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 711                 return false;
 712
 713         return true;
 714 }
 715
 716 static void ti_throttle(struct tty_struct *tty)
 717 {
 718         struct usb_serial_port *port = tty->driver_data;
 719         struct ti_port *tport = usb_get_serial_port_data(port);
 720
 721         if (tport == NULL)
 722                 return;
 723
 724         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 725                 ti_stop_read(tport, tty);
 726
 727 }
 728
 729
 730 static void ti_unthrottle(struct tty_struct *tty)
 731 {
 732         struct usb_serial_port *port = tty->driver_data;
 733         struct ti_port *tport = usb_get_serial_port_data(port);
 734         int status;
 735
 736         if (tport == NULL)
 737                 return;
 738
 739         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 740                 status = ti_restart_read(tport, tty);
 741                 if (status)
 742                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 743                                                         __func__, status);
 744         }
 745 }
 746
 747 static int ti_ioctl(struct tty_struct *tty,
 748         unsigned int cmd, unsigned long arg)
 749 {
 750         struct usb_serial_port *port = tty->driver_data;
 751         struct ti_port *tport = usb_get_serial_port_data(port);
 752
 753         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 754
 755         if (tport == NULL)
 756                 return -ENODEV;
 757
 758         switch (cmd) {
 759         case TIOCGSERIAL:
 760                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 761                 return ti_get_serial_info(tport,
 762                                 (struct serial_struct __user *)arg);
 763         case TIOCSSERIAL:
 764                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 765                 return ti_set_serial_info(tty, tport,
 766                                 (struct serial_struct __user *)arg);
 767         }
 768         return -ENOIOCTLCMD;
 769 }
 770
 771
 772 static void ti_set_termios(struct tty_struct *tty,
 773                 struct usb_serial_port *port, struct ktermios *old_termios)
 774 {
 775         struct ti_port *tport = usb_get_serial_port_data(port);
 776         struct ti_uart_config *config;
 777         tcflag_t cflag, iflag;
 778         int baud;
 779         int status;
 780         int port_number = port->number - port->serial->minor;
 781         unsigned int mcr;
 782
 783         cflag = tty->termios.c_cflag;
 784         iflag = tty->termios.c_iflag;
 785
 786         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 787         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 788                 old_termios->c_cflag, old_termios->c_iflag);
 789
 790         if (tport == NULL)
 791                 return;
 792
 793         config = kmalloc(sizeof(*config), GFP_KERNEL);
 794         if (!config) {
 795                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 796                 return;
 797         }
 798
 799         config->wFlags = 0;
 800
 801         /* these flags must be set */
 802         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 803         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 804         config->bUartMode = (__u8)(tport->tp_uart_mode);
 805
 806         switch (cflag & CSIZE) {
 807         case CS5:
 808                     config->bDataBits = TI_UART_5_DATA_BITS;
 809                     break;
 810         case CS6:
 811                     config->bDataBits = TI_UART_6_DATA_BITS;
 812                     break;
 813         case CS7:
 814                     config->bDataBits = TI_UART_7_DATA_BITS;
 815                     break;
 816         default:
 817         case CS8:
 818                     config->bDataBits = TI_UART_8_DATA_BITS;
 819                     break;
 820         }
 821
 822         /* CMSPAR isn't supported by this driver */
 823         tty->termios.c_cflag &= ~CMSPAR;
 824
 825         if (cflag & PARENB) {
 826                 if (cflag & PARODD) {
 827                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 828                         config->bParity = TI_UART_ODD_PARITY;
 829                 } else {
 830                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 831                         config->bParity = TI_UART_EVEN_PARITY;
 832                 }
 833         } else {
 834                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 835                 config->bParity = TI_UART_NO_PARITY;
 836         }
 837
 838         if (cflag & CSTOPB)
 839                 config->bStopBits = TI_UART_2_STOP_BITS;
 840         else
 841                 config->bStopBits = TI_UART_1_STOP_BITS;
 842
 843         if (cflag & CRTSCTS) {
 844                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 845                 if ((cflag & CBAUD) != B0)
 846                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 847                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 848         } else {
 849                 tty->hw_stopped = 0;
 850                 ti_restart_read(tport, tty);
 851         }
 852
 853         if (I_IXOFF(tty) || I_IXON(tty)) {
 854                 config->cXon  = START_CHAR(tty);
 855                 config->cXoff = STOP_CHAR(tty);
 856
 857                 if (I_IXOFF(tty))
 858                         config->wFlags |= TI_UART_ENABLE_X_IN;
 859                 else
 860                         ti_restart_read(tport, tty);
 861
 862                 if (I_IXON(tty))
 863                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 864         }
 865
 866         baud = tty_get_baud_rate(tty);
 867         if (!baud)
 868                 baud = 9600;
 869         if (tport->tp_tdev->td_is_3410)
 870                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 871         else
 872                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 873
 874         /* FIXME: Should calculate resulting baud here and report it back */
 875         if ((cflag & CBAUD) != B0)
 876                 tty_encode_baud_rate(tty, baud, baud);
 877
 878         dev_dbg(&port->dev,
 879                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 880                 __func__, baud, config->wBaudRate, config->wFlags,
 881                 config->bDataBits, config->bParity, config->bStopBits,
 882                 config->cXon, config->cXoff, config->bUartMode);
 883
 884         cpu_to_be16s(&config->wBaudRate);
 885         cpu_to_be16s(&config->wFlags);
 886
 887         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 888                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 889                 sizeof(*config));
 890         if (status)
 891                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 892                                         __func__, port_number, status);
 893
 894         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 895         mcr = tport->tp_shadow_mcr;
 896         /* if baud rate is B0, clear RTS and DTR */
 897         if ((cflag & CBAUD) == B0)
 898                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 899         status = ti_set_mcr(tport, mcr);
 900         if (status)
 901                 dev_err(&port->dev,
 902                         "%s - cannot set modem control on port %d, %d\n",
 903                                                 __func__, port_number, status);
 904
 905         kfree(config);
 906 }
 907
 908
 909 static int ti_tiocmget(struct tty_struct *tty)
 910 {
 911         struct usb_serial_port *port = tty->driver_data;
 912         struct ti_port *tport = usb_get_serial_port_data(port);
 913         unsigned int result;
 914         unsigned int msr;
 915         unsigned int mcr;
 916         unsigned long flags;
 917
 918         if (tport == NULL)
 919                 return -ENODEV;
 920
 921         spin_lock_irqsave(&tport->tp_lock, flags);
 922         msr = tport->tp_msr;
 923         mcr = tport->tp_shadow_mcr;
 924         spin_unlock_irqrestore(&tport->tp_lock, flags);
 925
 926         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 927                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 928                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 929                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 930                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 931                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 932                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 933
 934         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 935
 936         return result;
 937 }
 938
 939
 940 static int ti_tiocmset(struct tty_struct *tty,
 941                                 unsigned int set, unsigned int clear)
 942 {
 943         struct usb_serial_port *port = tty->driver_data;
 944         struct ti_port *tport = usb_get_serial_port_data(port);
 945         unsigned int mcr;
 946         unsigned long flags;
 947
 948         if (tport == NULL)
 949                 return -ENODEV;
 950
 951         spin_lock_irqsave(&tport->tp_lock, flags);
 952         mcr = tport->tp_shadow_mcr;
 953
 954         if (set & TIOCM_RTS)
 955                 mcr |= TI_MCR_RTS;
 956         if (set & TIOCM_DTR)
 957                 mcr |= TI_MCR_DTR;
 958         if (set & TIOCM_LOOP)
 959                 mcr |= TI_MCR_LOOP;
 960
 961         if (clear & TIOCM_RTS)
 962                 mcr &= ~TI_MCR_RTS;
 963         if (clear & TIOCM_DTR)
 964                 mcr &= ~TI_MCR_DTR;
 965         if (clear & TIOCM_LOOP)
 966                 mcr &= ~TI_MCR_LOOP;
 967         spin_unlock_irqrestore(&tport->tp_lock, flags);
 968
 969         return ti_set_mcr(tport, mcr);
 970 }
 971
 972
 973 static void ti_break(struct tty_struct *tty, int break_state)
 974 {
 975         struct usb_serial_port *port = tty->driver_data;
 976         struct ti_port *tport = usb_get_serial_port_data(port);
 977         int status;
 978
 979         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 980
 981         if (tport == NULL)
 982                 return;
 983
 984         status = ti_write_byte(port, tport->tp_tdev,
 985                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 986                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 987
 988         if (status)
 989                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 990 }
 991
 992
 993 static void ti_interrupt_callback(struct urb *urb)
 994 {
 995         struct ti_device *tdev = urb->context;
 996         struct usb_serial_port *port;
 997         struct usb_serial *serial = tdev->td_serial;
 998         struct ti_port *tport;
 999         struct device *dev = &urb->dev->dev;
1000         unsigned char *data = urb->transfer_buffer;
1001         int length = urb->actual_length;
1002         int port_number;
1003         int function;
1004         int status = urb->status;
1005         int retval;
1006         __u8 msr;
1007
1008         switch (status) {
1009         case 0:
1010                 break;
1011         case -ECONNRESET:
1012         case -ENOENT:
1013         case -ESHUTDOWN:
1014                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1015                 tdev->td_urb_error = 1;
1016                 return;
1017         default:
1018                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1019                 tdev->td_urb_error = 1;
1020                 goto exit;
1021         }
1022
1023         if (length != 2) {
1024                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1025                 goto exit;
1026         }
1027
1028         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1029                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1030                 goto exit;
1031         }
1032
1033         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1034         function = TI_GET_FUNC_FROM_CODE(data[0]);
1035
1036         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1037                 __func__, port_number, function, data[1]);
1038
1039         if (port_number >= serial->num_ports) {
1040                 dev_err(dev, "%s - bad port number, %d\n",
1041                                                 __func__, port_number);
1042                 goto exit;
1043         }
1044
1045         port = serial->port[port_number];
1046
1047         tport = usb_get_serial_port_data(port);
1048         if (!tport)
1049                 goto exit;
1050
1051         switch (function) {
1052         case TI_CODE_DATA_ERROR:
1053                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1054                         __func__, port_number, data[1]);
1055                 break;
1056
1057         case TI_CODE_MODEM_STATUS:
1058                 msr = data[1];
1059                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1060                 ti_handle_new_msr(tport, msr);
1061                 break;
1062
1063         default:
1064                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1065                                                         __func__, data[1]);
1066                 break;
1067         }
1068
1069 exit:
1070         retval = usb_submit_urb(urb, GFP_ATOMIC);
1071         if (retval)
1072                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1073                         __func__, retval);
1074 }
1075
1076
1077 static void ti_bulk_in_callback(struct urb *urb)
1078 {
1079         struct ti_port *tport = urb->context;
1080         struct usb_serial_port *port = tport->tp_port;
1081         struct device *dev = &urb->dev->dev;
1082         int status = urb->status;
1083         int retval = 0;
1084
1085         switch (status) {
1086         case 0:
1087                 break;
1088         case -ECONNRESET:
1089         case -ENOENT:
1090         case -ESHUTDOWN:
1091                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1092                 tport->tp_tdev->td_urb_error = 1;
1093                 wake_up_interruptible(&tport->tp_write_wait);
1094                 return;
1095         default:
1096                 dev_err(dev, "%s - nonzero urb status, %d\n",
1097                         __func__, status);
1098                 tport->tp_tdev->td_urb_error = 1;
1099                 wake_up_interruptible(&tport->tp_write_wait);
1100         }
1101
1102         if (status == -EPIPE)
1103                 goto exit;
1104
1105         if (status) {
1106                 dev_err(dev, "%s - stopping read!\n", __func__);
1107                 return;
1108         }
1109
1110         if (urb->actual_length) {
1111                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1112                                       urb->transfer_buffer);
1113
1114                 if (!tport->tp_is_open)
1115                         dev_dbg(dev, "%s - port closed, dropping data\n",
1116                                 __func__);
1117                 else
1118                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1119                 spin_lock(&tport->tp_lock);
1120                 port->icount.rx += urb->actual_length;
1121                 spin_unlock(&tport->tp_lock);
1122         }
1123
1124 exit:
1125         /* continue to read unless stopping */
1126         spin_lock(&tport->tp_lock);
1127         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1128                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1129         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1130                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1131
1132         spin_unlock(&tport->tp_lock);
1133         if (retval)
1134                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1135                         __func__, retval);
1136 }
1137
1138
1139 static void ti_bulk_out_callback(struct urb *urb)
1140 {
1141         struct ti_port *tport = urb->context;
1142         struct usb_serial_port *port = tport->tp_port;
1143         int status = urb->status;
1144
1145         tport->tp_write_urb_in_use = 0;
1146
1147         switch (status) {
1148         case 0:
1149                 break;
1150         case -ECONNRESET:
1151         case -ENOENT:
1152         case -ESHUTDOWN:
1153                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1154                 tport->tp_tdev->td_urb_error = 1;
1155                 wake_up_interruptible(&tport->tp_write_wait);
1156                 return;
1157         default:
1158                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1159                         __func__, status);
1160                 tport->tp_tdev->td_urb_error = 1;
1161                 wake_up_interruptible(&tport->tp_write_wait);
1162         }
1163
1164         /* send any buffered data */
1165         ti_send(tport);
1166 }
1167
1168
1169 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1170                 int length)
1171 {
1172         int cnt;
1173
1174         do {
1175                 cnt = tty_insert_flip_string(&port->port, data, length);
1176                 if (cnt < length) {
1177                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1178                                                 __func__, length - cnt);
1179                         if (cnt == 0)
1180                                 break;
1181                 }
1182                 tty_flip_buffer_push(&port->port);
1183                 data += cnt;
1184                 length -= cnt;
1185         } while (length > 0);
1186 }
1187
1188
1189 static void ti_send(struct ti_port *tport)
1190 {
1191         int count, result;
1192         struct usb_serial_port *port = tport->tp_port;
1193         unsigned long flags;
1194
1195         spin_lock_irqsave(&tport->tp_lock, flags);
1196
1197         if (tport->tp_write_urb_in_use)
1198                 goto unlock;
1199
1200         count = kfifo_out(&tport->write_fifo,
1201                                 port->write_urb->transfer_buffer,
1202                                 port->bulk_out_size);
1203
1204         if (count == 0)
1205                 goto unlock;
1206
1207         tport->tp_write_urb_in_use = 1;
1208
1209         spin_unlock_irqrestore(&tport->tp_lock, flags);
1210
1211         usb_serial_debug_data(&port->dev, __func__, count,
1212                               port->write_urb->transfer_buffer);
1213
1214         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1215                            usb_sndbulkpipe(port->serial->dev,
1216                                             port->bulk_out_endpointAddress),
1217                            port->write_urb->transfer_buffer, count,
1218                            ti_bulk_out_callback, tport);
1219
1220         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1221         if (result) {
1222                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1223                                                         __func__, result);
1224                 tport->tp_write_urb_in_use = 0;
1225                 /* TODO: reschedule ti_send */
1226         } else {
1227                 spin_lock_irqsave(&tport->tp_lock, flags);
1228                 port->icount.tx += count;
1229                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1230         }
1231
1232         /* more room in the buffer for new writes, wakeup */
1233         tty_port_tty_wakeup(&port->port);
1234
1235         wake_up_interruptible(&tport->tp_write_wait);
1236         return;
1237 unlock:
1238         spin_unlock_irqrestore(&tport->tp_lock, flags);
1239         return;
1240 }
1241
1242
1243 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1244 {
1245         unsigned long flags;
1246         int status;
1247
1248         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1249                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1250                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1251
1252         spin_lock_irqsave(&tport->tp_lock, flags);
1253         if (!status)
1254                 tport->tp_shadow_mcr = mcr;
1255         spin_unlock_irqrestore(&tport->tp_lock, flags);
1256
1257         return status;
1258 }
1259
1260
1261 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1262 {
1263         int size, status;
1264         struct ti_device *tdev = tport->tp_tdev;
1265         struct usb_serial_port *port = tport->tp_port;
1266         int port_number = port->number - port->serial->minor;
1267         struct ti_port_status *data;
1268
1269         size = sizeof(struct ti_port_status);
1270         data = kmalloc(size, GFP_KERNEL);
1271         if (!data) {
1272                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1273                 return -ENOMEM;
1274         }
1275
1276         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1277                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1278         if (status) {
1279                 dev_err(&port->dev,
1280                         "%s - get port status command failed, %d\n",
1281                                                         __func__, status);
1282                 goto free_data;
1283         }
1284
1285         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1286
1287         *lsr = data->bLSR;
1288
1289 free_data:
1290         kfree(data);
1291         return status;
1292 }
1293
1294
1295 static int ti_get_serial_info(struct ti_port *tport,
1296         struct serial_struct __user *ret_arg)
1297 {
1298         struct usb_serial_port *port = tport->tp_port;
1299         struct serial_struct ret_serial;
1300         unsigned cwait;
1301
1302         if (!ret_arg)
1303                 return -EFAULT;
1304
1305         cwait = port->port.closing_wait;
1306         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1307                 cwait = jiffies_to_msecs(cwait) / 10;
1308
1309         memset(&ret_serial, 0, sizeof(ret_serial));
1310
1311         ret_serial.type = PORT_16550A;
1312         ret_serial.line = port->serial->minor;
1313         ret_serial.port = port->number - port->serial->minor;
1314         ret_serial.flags = tport->tp_flags;
1315         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1316         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1317         ret_serial.closing_wait = cwait;
1318
1319         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1320                 return -EFAULT;
1321
1322         return 0;
1323 }
1324
1325
1326 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1327         struct serial_struct __user *new_arg)
1328 {
1329         struct serial_struct new_serial;
1330         unsigned cwait;
1331
1332         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1333                 return -EFAULT;
1334
1335         cwait = new_serial.closing_wait;
1336         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1337                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1338
1339         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1340         tport->tp_port->port.closing_wait = cwait;
1341
1342         return 0;
1343 }
1344
1345
1346 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1347 {
1348         struct async_icount *icount;
1349         struct tty_struct *tty;
1350         unsigned long flags;
1351
1352         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1353
1354         if (msr & TI_MSR_DELTA_MASK) {
1355                 spin_lock_irqsave(&tport->tp_lock, flags);
1356                 icount = &tport->tp_port->icount;
1357                 if (msr & TI_MSR_DELTA_CTS)
1358                         icount->cts++;
1359                 if (msr & TI_MSR_DELTA_DSR)
1360                         icount->dsr++;
1361                 if (msr & TI_MSR_DELTA_CD)
1362                         icount->dcd++;
1363                 if (msr & TI_MSR_DELTA_RI)
1364                         icount->rng++;
1365                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1366                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1367         }
1368
1369         tport->tp_msr = msr & TI_MSR_MASK;
1370
1371         /* handle CTS flow control */
1372         tty = tty_port_tty_get(&tport->tp_port->port);
1373         if (tty && C_CRTSCTS(tty)) {
1374                 if (msr & TI_MSR_CTS) {
1375                         tty->hw_stopped = 0;
1376                         tty_wakeup(tty);
1377                 } else {
1378                         tty->hw_stopped = 1;
1379                 }
1380         }
1381         tty_kref_put(tty);
1382 }
1383
1384
1385 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1386 {
1387         unsigned long flags;
1388
1389         spin_lock_irqsave(&tport->tp_lock, flags);
1390
1391         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1392                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1393
1394         spin_unlock_irqrestore(&tport->tp_lock, flags);
1395 }
1396
1397
1398 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1399 {
1400         struct urb *urb;
1401         int status = 0;
1402         unsigned long flags;
1403
1404         spin_lock_irqsave(&tport->tp_lock, flags);
1405
1406         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1407                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1408                 urb = tport->tp_port->read_urb;
1409                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1410                 urb->context = tport;
1411                 status = usb_submit_urb(urb, GFP_KERNEL);
1412         } else  {
1413                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1414                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1415         }
1416
1417         return status;
1418 }
1419
1420
1421 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1422         __u16 moduleid, __u16 value, __u8 *data, int size)
1423 {
1424         int status;
1425
1426         status = usb_control_msg(tdev->td_serial->dev,
1427                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1428                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1429                 value, moduleid, data, size, 1000);
1430
1431         if (status == size)
1432                 status = 0;
1433
1434         if (status > 0)
1435                 status = -ECOMM;
1436
1437         return status;
1438 }
1439
1440
1441 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1442         __u16 moduleid, __u16 value, __u8 *data, int size)
1443 {
1444         int status;
1445
1446         status = usb_control_msg(tdev->td_serial->dev,
1447                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1448                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1449                 value, moduleid, data, size, 1000);
1450
1451         if (status == size)
1452                 status = 0;
1453
1454         if (status > 0)
1455                 status = -ECOMM;
1456
1457         return status;
1458 }
1459
1460
1461 static int ti_write_byte(struct usb_serial_port *port,
1462                         struct ti_device *tdev, unsigned long addr,
1463                         __u8 mask, __u8 byte)
1464 {
1465         int status;
1466         unsigned int size;
1467         struct ti_write_data_bytes *data;
1468
1469         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1470                 addr, mask, byte);
1471
1472         size = sizeof(struct ti_write_data_bytes) + 2;
1473         data = kmalloc(size, GFP_KERNEL);
1474         if (!data) {
1475                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1476                 return -ENOMEM;
1477         }
1478
1479         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1480         data->bDataType = TI_RW_DATA_BYTE;
1481         data->bDataCounter = 1;
1482         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1483         data->wBaseAddrLo = cpu_to_be16(addr);
1484         data->bData[0] = mask;
1485         data->bData[1] = byte;
1486
1487         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1488                 (__u8 *)data, size);
1489
1490         if (status < 0)
1491                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1492
1493         kfree(data);
1494
1495         return status;
1496 }
1497
1498 static int ti_do_download(struct usb_device *dev, int pipe,
1499                                                 u8 *buffer, int size)
1500 {
1501         int pos;
1502         u8 cs = 0;
1503         int done;
1504         struct ti_firmware_header *header;
1505         int status = 0;
1506         int len;
1507
1508         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1509                 cs = (__u8)(cs + buffer[pos]);
1510
1511         header = (struct ti_firmware_header *)buffer;
1512         header->wLength = cpu_to_le16((__u16)(size
1513                                         - sizeof(struct ti_firmware_header)));
1514         header->bCheckSum = cs;
1515
1516         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1517         for (pos = 0; pos < size; pos += done) {
1518                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1519                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1520                                                                 &done, 1000);
1521                 if (status)
1522                         break;
1523         }
1524         return status;
1525 }
1526
1527 static int ti_download_firmware(struct ti_device *tdev)
1528 {
1529         int status;
1530         int buffer_size;
1531         __u8 *buffer;
1532         struct usb_device *dev = tdev->td_serial->dev;
1533         unsigned int pipe = usb_sndbulkpipe(dev,
1534                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1535         const struct firmware *fw_p;
1536         char buf[32];
1537
1538         /* try ID specific firmware first, then try generic firmware */
1539         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1540             dev->descriptor.idProduct);
1541         status = request_firmware(&fw_p, buf, &dev->dev);
1542
1543         if (status != 0) {
1544                 buf[0] = '\0';
1545                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1546                         switch (dev->descriptor.idProduct) {
1547                         case MTS_CDMA_PRODUCT_ID:
1548                                 strcpy(buf, "mts_cdma.fw");
1549                                 break;
1550                         case MTS_GSM_PRODUCT_ID:
1551                                 strcpy(buf, "mts_gsm.fw");
1552                                 break;
1553                         case MTS_EDGE_PRODUCT_ID:
1554                                 strcpy(buf, "mts_edge.fw");
1555                                 break;
1556                         case MTS_MT9234MU_PRODUCT_ID:
1557                                 strcpy(buf, "mts_mt9234mu.fw");
1558                                 break;
1559                         case MTS_MT9234ZBA_PRODUCT_ID:
1560                                 strcpy(buf, "mts_mt9234zba.fw");
1561                                 break;
1562                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1563                                 strcpy(buf, "mts_mt9234zba.fw");
1564                                 break;                  }
1565                 }
1566                 if (buf[0] == '\0') {
1567                         if (tdev->td_is_3410)
1568                                 strcpy(buf, "ti_3410.fw");
1569                         else
1570                                 strcpy(buf, "ti_5052.fw");
1571                 }
1572                 status = request_firmware(&fw_p, buf, &dev->dev);
1573         }
1574         if (status) {
1575                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1576                 return -ENOENT;
1577         }
1578         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1579                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1580                 release_firmware(fw_p);
1581                 return -ENOENT;
1582         }
1583
1584         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1585         buffer = kmalloc(buffer_size, GFP_KERNEL);
1586         if (buffer) {
1587                 memcpy(buffer, fw_p->data, fw_p->size);
1588                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1589                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1590                 kfree(buffer);
1591         } else {
1592                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1593                 status = -ENOMEM;
1594         }
1595         release_firmware(fw_p);
1596         if (status) {
1597                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1598                                                         __func__, status);
1599                 return status;
1600         }
1601
1602         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1603
1604         return 0;
1605 }