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 void ti_throttle(struct tty_struct *tty);
 105 static void ti_unthrottle(struct tty_struct *tty);
 106 static int ti_ioctl(struct tty_struct *tty,
 107                 unsigned int cmd, unsigned long arg);
 108 static void ti_set_termios(struct tty_struct *tty,
 109                 struct usb_serial_port *port, struct ktermios *old_termios);
 110 static int ti_tiocmget(struct tty_struct *tty);
 111 static int ti_tiocmset(struct tty_struct *tty,
 112                 unsigned int set, unsigned int clear);
 113 static void ti_break(struct tty_struct *tty, int break_state);
 114 static void ti_interrupt_callback(struct urb *urb);
 115 static void ti_bulk_in_callback(struct urb *urb);
 116 static void ti_bulk_out_callback(struct urb *urb);
 117
 118 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
 119                 int length);
 120 static void ti_send(struct ti_port *tport);
 121 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 122 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
 123 static int ti_get_serial_info(struct ti_port *tport,
 124         struct serial_struct __user *ret_arg);
 125 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 126         struct serial_struct __user *new_arg);
 127 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 128
 129 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 130 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 131
 132 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 133         __u16 moduleid, __u16 value, __u8 *data, int size);
 134 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 135         __u16 moduleid, __u16 value, __u8 *data, int size);
 136
 137 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 138                          unsigned long addr, __u8 mask, __u8 byte);
 139
 140 static int ti_download_firmware(struct ti_device *tdev);
 141
 142
 143 /* Data */
 144
 145 /* module parameters */
 146 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 147 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 148 static unsigned int vendor_3410_count;
 149 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 150 static unsigned int product_3410_count;
 151 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 152 static unsigned int vendor_5052_count;
 153 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 154 static unsigned int product_5052_count;
 155
 156 /* supported devices */
 157 /* the array dimension is the number of default entries plus */
 158 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 159 /* null entry */
 160 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
 161         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 162         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 163         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 164         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 165         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 166         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 167         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 168         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 169         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 170         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 171         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 172         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 173         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 174         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 175         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 176 };
 177
 178 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 179         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 180         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 181         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 182         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 183 };
 184
 185 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 186         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 188         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 189         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 190         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 191         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 192         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 193         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 194         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 196         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 197         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 198         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 199         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 200         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 201         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 202         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 203         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 205         { }
 206 };
 207
 208 static struct usb_serial_driver ti_1port_device = {
 209         .driver = {
 210                 .owner          = THIS_MODULE,
 211                 .name           = "ti_usb_3410_5052_1",
 212         },
 213         .description            = "TI USB 3410 1 port adapter",
 214         .id_table               = ti_id_table_3410,
 215         .num_ports              = 1,
 216         .attach                 = ti_startup,
 217         .release                = ti_release,
 218         .port_probe             = ti_port_probe,
 219         .port_remove            = ti_port_remove,
 220         .open                   = ti_open,
 221         .close                  = ti_close,
 222         .write                  = ti_write,
 223         .write_room             = ti_write_room,
 224         .chars_in_buffer        = ti_chars_in_buffer,
 225         .throttle               = ti_throttle,
 226         .unthrottle             = ti_unthrottle,
 227         .ioctl                  = ti_ioctl,
 228         .set_termios            = ti_set_termios,
 229         .tiocmget               = ti_tiocmget,
 230         .tiocmset               = ti_tiocmset,
 231         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 232         .get_icount             = usb_serial_generic_get_icount,
 233         .break_ctl              = ti_break,
 234         .read_int_callback      = ti_interrupt_callback,
 235         .read_bulk_callback     = ti_bulk_in_callback,
 236         .write_bulk_callback    = ti_bulk_out_callback,
 237 };
 238
 239 static struct usb_serial_driver ti_2port_device = {
 240         .driver = {
 241                 .owner          = THIS_MODULE,
 242                 .name           = "ti_usb_3410_5052_2",
 243         },
 244         .description            = "TI USB 5052 2 port adapter",
 245         .id_table               = ti_id_table_5052,
 246         .num_ports              = 2,
 247         .attach                 = ti_startup,
 248         .release                = ti_release,
 249         .port_probe             = ti_port_probe,
 250         .port_remove            = ti_port_remove,
 251         .open                   = ti_open,
 252         .close                  = ti_close,
 253         .write                  = ti_write,
 254         .write_room             = ti_write_room,
 255         .chars_in_buffer        = ti_chars_in_buffer,
 256         .throttle               = ti_throttle,
 257         .unthrottle             = ti_unthrottle,
 258         .ioctl                  = ti_ioctl,
 259         .set_termios            = ti_set_termios,
 260         .tiocmget               = ti_tiocmget,
 261         .tiocmset               = ti_tiocmset,
 262         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 263         .get_icount             = usb_serial_generic_get_icount,
 264         .break_ctl              = ti_break,
 265         .read_int_callback      = ti_interrupt_callback,
 266         .read_bulk_callback     = ti_bulk_in_callback,
 267         .write_bulk_callback    = ti_bulk_out_callback,
 268 };
 269
 270 static struct usb_serial_driver * const serial_drivers[] = {
 271         &ti_1port_device, &ti_2port_device, NULL
 272 };
 273
 274 /* Module */
 275
 276 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 277 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 278 MODULE_LICENSE("GPL");
 279
 280 MODULE_FIRMWARE("ti_3410.fw");
 281 MODULE_FIRMWARE("ti_5052.fw");
 282 MODULE_FIRMWARE("mts_cdma.fw");
 283 MODULE_FIRMWARE("mts_gsm.fw");
 284 MODULE_FIRMWARE("mts_edge.fw");
 285 MODULE_FIRMWARE("mts_mt9234mu.fw");
 286 MODULE_FIRMWARE("mts_mt9234zba.fw");
 287
 288 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 289 MODULE_PARM_DESC(closing_wait,
 290     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 291
 292 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 293 MODULE_PARM_DESC(vendor_3410,
 294                 "Vendor ids for 3410 based devices, 1-5 short integers");
 295 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 296 MODULE_PARM_DESC(product_3410,
 297                 "Product ids for 3410 based devices, 1-5 short integers");
 298 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 299 MODULE_PARM_DESC(vendor_5052,
 300                 "Vendor ids for 5052 based devices, 1-5 short integers");
 301 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 302 MODULE_PARM_DESC(product_5052,
 303                 "Product ids for 5052 based devices, 1-5 short integers");
 304
 305 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 306
 307
 308 /* Functions */
 309
 310 static int __init ti_init(void)
 311 {
 312         int i, j, c;
 313
 314         /* insert extra vendor and product ids */
 315         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 316         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 317         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 318                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 319                 ti_id_table_3410[j].idProduct = product_3410[i];
 320                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 321                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 322                 ti_id_table_combined[c].idProduct = product_3410[i];
 323                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 324         }
 325         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 326         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 327                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 328                 ti_id_table_5052[j].idProduct = product_5052[i];
 329                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 330                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 331                 ti_id_table_combined[c].idProduct = product_5052[i];
 332                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 333         }
 334
 335         return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 336 }
 337
 338 static void __exit ti_exit(void)
 339 {
 340         usb_serial_deregister_drivers(serial_drivers);
 341 }
 342
 343 module_init(ti_init);
 344 module_exit(ti_exit);
 345
 346
 347 static int ti_startup(struct usb_serial *serial)
 348 {
 349         struct ti_device *tdev;
 350         struct usb_device *dev = serial->dev;
 351         int status;
 352
 353         dev_dbg(&dev->dev,
 354                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 355                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 356                 dev->descriptor.bNumConfigurations,
 357                 dev->actconfig->desc.bConfigurationValue);
 358
 359         /* create device structure */
 360         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 361         if (tdev == NULL) {
 362                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 363                 return -ENOMEM;
 364         }
 365         mutex_init(&tdev->td_open_close_lock);
 366         tdev->td_serial = serial;
 367         usb_set_serial_data(serial, tdev);
 368
 369         /* determine device type */
 370         if (usb_match_id(serial->interface, ti_id_table_3410))
 371                 tdev->td_is_3410 = 1;
 372         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 373                 tdev->td_is_3410 ? "3410" : "5052");
 374
 375         /* if we have only 1 configuration, download firmware */
 376         if (dev->descriptor.bNumConfigurations == 1) {
 377                 status = ti_download_firmware(tdev);
 378
 379                 if (status != 0)
 380                         goto free_tdev;
 381
 382                 /* 3410 must be reset, 5052 resets itself */
 383                 if (tdev->td_is_3410) {
 384                         msleep_interruptible(100);
 385                         usb_reset_device(dev);
 386                 }
 387
 388                 status = -ENODEV;
 389                 goto free_tdev;
 390         }
 391
 392         /* the second configuration must be set */
 393         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 394                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 395                 status = status ? status : -ENODEV;
 396                 goto free_tdev;
 397         }
 398
 399         return 0;
 400
 401 free_tdev:
 402         kfree(tdev);
 403         usb_set_serial_data(serial, NULL);
 404         return status;
 405 }
 406
 407
 408 static void ti_release(struct usb_serial *serial)
 409 {
 410         struct ti_device *tdev = usb_get_serial_data(serial);
 411
 412         kfree(tdev);
 413 }
 414
 415 static int ti_port_probe(struct usb_serial_port *port)
 416 {
 417         struct ti_port *tport;
 418
 419         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 420         if (!tport)
 421                 return -ENOMEM;
 422
 423         spin_lock_init(&tport->tp_lock);
 424         if (port == port->serial->port[0])
 425                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 426         else
 427                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 428         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 429         init_waitqueue_head(&tport->tp_write_wait);
 430         if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
 431                 kfree(tport);
 432                 return -ENOMEM;
 433         }
 434         tport->tp_port = port;
 435         tport->tp_tdev = usb_get_serial_data(port->serial);
 436         tport->tp_uart_mode = 0;        /* default is RS232 */
 437
 438         usb_set_serial_port_data(port, tport);
 439
 440         return 0;
 441 }
 442
 443 static int ti_port_remove(struct usb_serial_port *port)
 444 {
 445         struct ti_port *tport;
 446
 447         tport = usb_get_serial_port_data(port);
 448         kfifo_free(&tport->write_fifo);
 449         kfree(tport);
 450
 451         return 0;
 452 }
 453
 454 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 455 {
 456         struct ti_port *tport = usb_get_serial_port_data(port);
 457         struct ti_device *tdev;
 458         struct usb_device *dev;
 459         struct urb *urb;
 460         int port_number;
 461         int status;
 462         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 463                              TI_PIPE_TIMEOUT_ENABLE |
 464                              (TI_TRANSFER_TIMEOUT << 2));
 465
 466         if (tport == NULL)
 467                 return -ENODEV;
 468
 469         dev = port->serial->dev;
 470         tdev = tport->tp_tdev;
 471
 472         /* only one open on any port on a device at a time */
 473         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 474                 return -ERESTARTSYS;
 475
 476         port_number = port->number - port->serial->minor;
 477
 478         tport->tp_msr = 0;
 479         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 480
 481         /* start interrupt urb the first time a port is opened on this device */
 482         if (tdev->td_open_port_count == 0) {
 483                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 484                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 485                 if (!urb) {
 486                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 487                         status = -EINVAL;
 488                         goto release_lock;
 489                 }
 490                 urb->context = tdev;
 491                 status = usb_submit_urb(urb, GFP_KERNEL);
 492                 if (status) {
 493                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 494                         goto release_lock;
 495                 }
 496         }
 497
 498         if (tty)
 499                 ti_set_termios(tty, port, &tty->termios);
 500
 501         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 502         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 503                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 504         if (status) {
 505                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 506                         __func__, status);
 507                 goto unlink_int_urb;
 508         }
 509
 510         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 511         status = ti_command_out_sync(tdev, TI_START_PORT,
 512                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 513         if (status) {
 514                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 515                                                         __func__, status);
 516                 goto unlink_int_urb;
 517         }
 518
 519         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 520         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 521                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 522         if (status) {
 523                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 524                                                         __func__, status);
 525                 goto unlink_int_urb;
 526         }
 527         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 528                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 529         if (status) {
 530                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 531                                                         __func__, status);
 532                 goto unlink_int_urb;
 533         }
 534
 535         /* reset the data toggle on the bulk endpoints to work around bug in
 536          * host controllers where things get out of sync some times */
 537         usb_clear_halt(dev, port->write_urb->pipe);
 538         usb_clear_halt(dev, port->read_urb->pipe);
 539
 540         if (tty)
 541                 ti_set_termios(tty, port, &tty->termios);
 542
 543         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 544         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 545                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 546         if (status) {
 547                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 548                                                         __func__, status);
 549                 goto unlink_int_urb;
 550         }
 551
 552         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 553         status = ti_command_out_sync(tdev, TI_START_PORT,
 554                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 555         if (status) {
 556                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 557                                                         __func__, status);
 558                 goto unlink_int_urb;
 559         }
 560
 561         /* start read urb */
 562         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 563         urb = port->read_urb;
 564         if (!urb) {
 565                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 566                 status = -EINVAL;
 567                 goto unlink_int_urb;
 568         }
 569         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 570         urb->context = tport;
 571         status = usb_submit_urb(urb, GFP_KERNEL);
 572         if (status) {
 573                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 574                                                         __func__, status);
 575                 goto unlink_int_urb;
 576         }
 577
 578         tport->tp_is_open = 1;
 579         ++tdev->td_open_port_count;
 580
 581         port->port.drain_delay = 3;
 582
 583         goto release_lock;
 584
 585 unlink_int_urb:
 586         if (tdev->td_open_port_count == 0)
 587                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 588 release_lock:
 589         mutex_unlock(&tdev->td_open_close_lock);
 590         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 591         return status;
 592 }
 593
 594
 595 static void ti_close(struct usb_serial_port *port)
 596 {
 597         struct ti_device *tdev;
 598         struct ti_port *tport;
 599         int port_number;
 600         int status;
 601         int do_unlock;
 602         unsigned long flags;
 603
 604         tdev = usb_get_serial_data(port->serial);
 605         tport = usb_get_serial_port_data(port);
 606         if (tdev == NULL || tport == NULL)
 607                 return;
 608
 609         tport->tp_is_open = 0;
 610
 611         usb_kill_urb(port->read_urb);
 612         usb_kill_urb(port->write_urb);
 613         tport->tp_write_urb_in_use = 0;
 614         spin_lock_irqsave(&tport->tp_lock, flags);
 615         kfifo_reset_out(&tport->write_fifo);
 616         spin_unlock_irqrestore(&tport->tp_lock, flags);
 617
 618         port_number = port->number - port->serial->minor;
 619
 620         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 621         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 622                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 623         if (status)
 624                 dev_err(&port->dev,
 625                         "%s - cannot send close port command, %d\n"
 626                                                         , __func__, status);
 627
 628         /* if mutex_lock is interrupted, continue anyway */
 629         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 630         --tport->tp_tdev->td_open_port_count;
 631         if (tport->tp_tdev->td_open_port_count <= 0) {
 632                 /* last port is closed, shut down interrupt urb */
 633                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 634                 tport->tp_tdev->td_open_port_count = 0;
 635         }
 636         if (do_unlock)
 637                 mutex_unlock(&tdev->td_open_close_lock);
 638 }
 639
 640
 641 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 642                         const unsigned char *data, int count)
 643 {
 644         struct ti_port *tport = usb_get_serial_port_data(port);
 645
 646         if (count == 0) {
 647                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 648                 return 0;
 649         }
 650
 651         if (tport == NULL || !tport->tp_is_open)
 652                 return -ENODEV;
 653
 654         count = kfifo_in_locked(&tport->write_fifo, data, count,
 655                                                         &tport->tp_lock);
 656         ti_send(tport);
 657
 658         return count;
 659 }
 660
 661
 662 static int ti_write_room(struct tty_struct *tty)
 663 {
 664         struct usb_serial_port *port = tty->driver_data;
 665         struct ti_port *tport = usb_get_serial_port_data(port);
 666         int room = 0;
 667         unsigned long flags;
 668
 669         if (tport == NULL)
 670                 return 0;
 671
 672         spin_lock_irqsave(&tport->tp_lock, flags);
 673         room = kfifo_avail(&tport->write_fifo);
 674         spin_unlock_irqrestore(&tport->tp_lock, flags);
 675
 676         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 677         return room;
 678 }
 679
 680
 681 static int ti_chars_in_buffer(struct tty_struct *tty)
 682 {
 683         struct usb_serial_port *port = tty->driver_data;
 684         struct ti_port *tport = usb_get_serial_port_data(port);
 685         int chars = 0;
 686         unsigned long flags;
 687         int ret;
 688         u8 lsr;
 689
 690         if (tport == NULL)
 691                 return 0;
 692
 693         spin_lock_irqsave(&tport->tp_lock, flags);
 694         chars = kfifo_len(&tport->write_fifo);
 695         spin_unlock_irqrestore(&tport->tp_lock, flags);
 696
 697         if (!chars) {
 698                 ret = ti_get_lsr(tport, &lsr);
 699                 if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 700                         chars = 1;
 701         }
 702
 703         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 704         return chars;
 705 }
 706
 707
 708 static void ti_throttle(struct tty_struct *tty)
 709 {
 710         struct usb_serial_port *port = tty->driver_data;
 711         struct ti_port *tport = usb_get_serial_port_data(port);
 712
 713         if (tport == NULL)
 714                 return;
 715
 716         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 717                 ti_stop_read(tport, tty);
 718
 719 }
 720
 721
 722 static void ti_unthrottle(struct tty_struct *tty)
 723 {
 724         struct usb_serial_port *port = tty->driver_data;
 725         struct ti_port *tport = usb_get_serial_port_data(port);
 726         int status;
 727
 728         if (tport == NULL)
 729                 return;
 730
 731         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 732                 status = ti_restart_read(tport, tty);
 733                 if (status)
 734                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 735                                                         __func__, status);
 736         }
 737 }
 738
 739 static int ti_ioctl(struct tty_struct *tty,
 740         unsigned int cmd, unsigned long arg)
 741 {
 742         struct usb_serial_port *port = tty->driver_data;
 743         struct ti_port *tport = usb_get_serial_port_data(port);
 744
 745         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 746
 747         if (tport == NULL)
 748                 return -ENODEV;
 749
 750         switch (cmd) {
 751         case TIOCGSERIAL:
 752                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 753                 return ti_get_serial_info(tport,
 754                                 (struct serial_struct __user *)arg);
 755         case TIOCSSERIAL:
 756                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 757                 return ti_set_serial_info(tty, tport,
 758                                 (struct serial_struct __user *)arg);
 759         }
 760         return -ENOIOCTLCMD;
 761 }
 762
 763
 764 static void ti_set_termios(struct tty_struct *tty,
 765                 struct usb_serial_port *port, struct ktermios *old_termios)
 766 {
 767         struct ti_port *tport = usb_get_serial_port_data(port);
 768         struct ti_uart_config *config;
 769         tcflag_t cflag, iflag;
 770         int baud;
 771         int status;
 772         int port_number = port->number - port->serial->minor;
 773         unsigned int mcr;
 774
 775         cflag = tty->termios.c_cflag;
 776         iflag = tty->termios.c_iflag;
 777
 778         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 779         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 780                 old_termios->c_cflag, old_termios->c_iflag);
 781
 782         if (tport == NULL)
 783                 return;
 784
 785         config = kmalloc(sizeof(*config), GFP_KERNEL);
 786         if (!config) {
 787                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 788                 return;
 789         }
 790
 791         config->wFlags = 0;
 792
 793         /* these flags must be set */
 794         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 795         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 796         config->bUartMode = (__u8)(tport->tp_uart_mode);
 797
 798         switch (cflag & CSIZE) {
 799         case CS5:
 800                     config->bDataBits = TI_UART_5_DATA_BITS;
 801                     break;
 802         case CS6:
 803                     config->bDataBits = TI_UART_6_DATA_BITS;
 804                     break;
 805         case CS7:
 806                     config->bDataBits = TI_UART_7_DATA_BITS;
 807                     break;
 808         default:
 809         case CS8:
 810                     config->bDataBits = TI_UART_8_DATA_BITS;
 811                     break;
 812         }
 813
 814         /* CMSPAR isn't supported by this driver */
 815         tty->termios.c_cflag &= ~CMSPAR;
 816
 817         if (cflag & PARENB) {
 818                 if (cflag & PARODD) {
 819                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 820                         config->bParity = TI_UART_ODD_PARITY;
 821                 } else {
 822                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 823                         config->bParity = TI_UART_EVEN_PARITY;
 824                 }
 825         } else {
 826                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 827                 config->bParity = TI_UART_NO_PARITY;
 828         }
 829
 830         if (cflag & CSTOPB)
 831                 config->bStopBits = TI_UART_2_STOP_BITS;
 832         else
 833                 config->bStopBits = TI_UART_1_STOP_BITS;
 834
 835         if (cflag & CRTSCTS) {
 836                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 837                 if ((cflag & CBAUD) != B0)
 838                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 839                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 840         } else {
 841                 tty->hw_stopped = 0;
 842                 ti_restart_read(tport, tty);
 843         }
 844
 845         if (I_IXOFF(tty) || I_IXON(tty)) {
 846                 config->cXon  = START_CHAR(tty);
 847                 config->cXoff = STOP_CHAR(tty);
 848
 849                 if (I_IXOFF(tty))
 850                         config->wFlags |= TI_UART_ENABLE_X_IN;
 851                 else
 852                         ti_restart_read(tport, tty);
 853
 854                 if (I_IXON(tty))
 855                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 856         }
 857
 858         baud = tty_get_baud_rate(tty);
 859         if (!baud)
 860                 baud = 9600;
 861         if (tport->tp_tdev->td_is_3410)
 862                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 863         else
 864                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 865
 866         /* FIXME: Should calculate resulting baud here and report it back */
 867         if ((cflag & CBAUD) != B0)
 868                 tty_encode_baud_rate(tty, baud, baud);
 869
 870         dev_dbg(&port->dev,
 871                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 872                 __func__, baud, config->wBaudRate, config->wFlags,
 873                 config->bDataBits, config->bParity, config->bStopBits,
 874                 config->cXon, config->cXoff, config->bUartMode);
 875
 876         cpu_to_be16s(&config->wBaudRate);
 877         cpu_to_be16s(&config->wFlags);
 878
 879         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 880                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 881                 sizeof(*config));
 882         if (status)
 883                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 884                                         __func__, port_number, status);
 885
 886         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 887         mcr = tport->tp_shadow_mcr;
 888         /* if baud rate is B0, clear RTS and DTR */
 889         if ((cflag & CBAUD) == B0)
 890                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 891         status = ti_set_mcr(tport, mcr);
 892         if (status)
 893                 dev_err(&port->dev,
 894                         "%s - cannot set modem control on port %d, %d\n",
 895                                                 __func__, port_number, status);
 896
 897         kfree(config);
 898 }
 899
 900
 901 static int ti_tiocmget(struct tty_struct *tty)
 902 {
 903         struct usb_serial_port *port = tty->driver_data;
 904         struct ti_port *tport = usb_get_serial_port_data(port);
 905         unsigned int result;
 906         unsigned int msr;
 907         unsigned int mcr;
 908         unsigned long flags;
 909
 910         if (tport == NULL)
 911                 return -ENODEV;
 912
 913         spin_lock_irqsave(&tport->tp_lock, flags);
 914         msr = tport->tp_msr;
 915         mcr = tport->tp_shadow_mcr;
 916         spin_unlock_irqrestore(&tport->tp_lock, flags);
 917
 918         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 919                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 920                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 921                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 922                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 923                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 924                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 925
 926         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 927
 928         return result;
 929 }
 930
 931
 932 static int ti_tiocmset(struct tty_struct *tty,
 933                                 unsigned int set, unsigned int clear)
 934 {
 935         struct usb_serial_port *port = tty->driver_data;
 936         struct ti_port *tport = usb_get_serial_port_data(port);
 937         unsigned int mcr;
 938         unsigned long flags;
 939
 940         if (tport == NULL)
 941                 return -ENODEV;
 942
 943         spin_lock_irqsave(&tport->tp_lock, flags);
 944         mcr = tport->tp_shadow_mcr;
 945
 946         if (set & TIOCM_RTS)
 947                 mcr |= TI_MCR_RTS;
 948         if (set & TIOCM_DTR)
 949                 mcr |= TI_MCR_DTR;
 950         if (set & TIOCM_LOOP)
 951                 mcr |= TI_MCR_LOOP;
 952
 953         if (clear & TIOCM_RTS)
 954                 mcr &= ~TI_MCR_RTS;
 955         if (clear & TIOCM_DTR)
 956                 mcr &= ~TI_MCR_DTR;
 957         if (clear & TIOCM_LOOP)
 958                 mcr &= ~TI_MCR_LOOP;
 959         spin_unlock_irqrestore(&tport->tp_lock, flags);
 960
 961         return ti_set_mcr(tport, mcr);
 962 }
 963
 964
 965 static void ti_break(struct tty_struct *tty, int break_state)
 966 {
 967         struct usb_serial_port *port = tty->driver_data;
 968         struct ti_port *tport = usb_get_serial_port_data(port);
 969         int status;
 970
 971         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 972
 973         if (tport == NULL)
 974                 return;
 975
 976         status = ti_write_byte(port, tport->tp_tdev,
 977                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 978                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 979
 980         if (status)
 981                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 982 }
 983
 984
 985 static void ti_interrupt_callback(struct urb *urb)
 986 {
 987         struct ti_device *tdev = urb->context;
 988         struct usb_serial_port *port;
 989         struct usb_serial *serial = tdev->td_serial;
 990         struct ti_port *tport;
 991         struct device *dev = &urb->dev->dev;
 992         unsigned char *data = urb->transfer_buffer;
 993         int length = urb->actual_length;
 994         int port_number;
 995         int function;
 996         int status = urb->status;
 997         int retval;
 998         __u8 msr;
 999
1000         switch (status) {
1001         case 0:
1002                 break;
1003         case -ECONNRESET:
1004         case -ENOENT:
1005         case -ESHUTDOWN:
1006                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1007                 tdev->td_urb_error = 1;
1008                 return;
1009         default:
1010                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1011                 tdev->td_urb_error = 1;
1012                 goto exit;
1013         }
1014
1015         if (length != 2) {
1016                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1017                 goto exit;
1018         }
1019
1020         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1021                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1022                 goto exit;
1023         }
1024
1025         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1026         function = TI_GET_FUNC_FROM_CODE(data[0]);
1027
1028         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1029                 __func__, port_number, function, data[1]);
1030
1031         if (port_number >= serial->num_ports) {
1032                 dev_err(dev, "%s - bad port number, %d\n",
1033                                                 __func__, port_number);
1034                 goto exit;
1035         }
1036
1037         port = serial->port[port_number];
1038
1039         tport = usb_get_serial_port_data(port);
1040         if (!tport)
1041                 goto exit;
1042
1043         switch (function) {
1044         case TI_CODE_DATA_ERROR:
1045                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1046                         __func__, port_number, data[1]);
1047                 break;
1048
1049         case TI_CODE_MODEM_STATUS:
1050                 msr = data[1];
1051                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1052                 ti_handle_new_msr(tport, msr);
1053                 break;
1054
1055         default:
1056                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1057                                                         __func__, data[1]);
1058                 break;
1059         }
1060
1061 exit:
1062         retval = usb_submit_urb(urb, GFP_ATOMIC);
1063         if (retval)
1064                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1065                         __func__, retval);
1066 }
1067
1068
1069 static void ti_bulk_in_callback(struct urb *urb)
1070 {
1071         struct ti_port *tport = urb->context;
1072         struct usb_serial_port *port = tport->tp_port;
1073         struct device *dev = &urb->dev->dev;
1074         int status = urb->status;
1075         int retval = 0;
1076
1077         switch (status) {
1078         case 0:
1079                 break;
1080         case -ECONNRESET:
1081         case -ENOENT:
1082         case -ESHUTDOWN:
1083                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1084                 tport->tp_tdev->td_urb_error = 1;
1085                 wake_up_interruptible(&tport->tp_write_wait);
1086                 return;
1087         default:
1088                 dev_err(dev, "%s - nonzero urb status, %d\n",
1089                         __func__, status);
1090                 tport->tp_tdev->td_urb_error = 1;
1091                 wake_up_interruptible(&tport->tp_write_wait);
1092         }
1093
1094         if (status == -EPIPE)
1095                 goto exit;
1096
1097         if (status) {
1098                 dev_err(dev, "%s - stopping read!\n", __func__);
1099                 return;
1100         }
1101
1102         if (urb->actual_length) {
1103                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1104                                       urb->transfer_buffer);
1105
1106                 if (!tport->tp_is_open)
1107                         dev_dbg(dev, "%s - port closed, dropping data\n",
1108                                 __func__);
1109                 else
1110                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1111                 spin_lock(&tport->tp_lock);
1112                 port->icount.rx += urb->actual_length;
1113                 spin_unlock(&tport->tp_lock);
1114         }
1115
1116 exit:
1117         /* continue to read unless stopping */
1118         spin_lock(&tport->tp_lock);
1119         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1120                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1121         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1122                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1123
1124         spin_unlock(&tport->tp_lock);
1125         if (retval)
1126                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1127                         __func__, retval);
1128 }
1129
1130
1131 static void ti_bulk_out_callback(struct urb *urb)
1132 {
1133         struct ti_port *tport = urb->context;
1134         struct usb_serial_port *port = tport->tp_port;
1135         int status = urb->status;
1136
1137         tport->tp_write_urb_in_use = 0;
1138
1139         switch (status) {
1140         case 0:
1141                 break;
1142         case -ECONNRESET:
1143         case -ENOENT:
1144         case -ESHUTDOWN:
1145                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1146                 tport->tp_tdev->td_urb_error = 1;
1147                 wake_up_interruptible(&tport->tp_write_wait);
1148                 return;
1149         default:
1150                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1151                         __func__, status);
1152                 tport->tp_tdev->td_urb_error = 1;
1153                 wake_up_interruptible(&tport->tp_write_wait);
1154         }
1155
1156         /* send any buffered data */
1157         ti_send(tport);
1158 }
1159
1160
1161 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1162                 int length)
1163 {
1164         int cnt;
1165
1166         do {
1167                 cnt = tty_insert_flip_string(&port->port, data, length);
1168                 if (cnt < length) {
1169                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1170                                                 __func__, length - cnt);
1171                         if (cnt == 0)
1172                                 break;
1173                 }
1174                 tty_flip_buffer_push(&port->port);
1175                 data += cnt;
1176                 length -= cnt;
1177         } while (length > 0);
1178 }
1179
1180
1181 static void ti_send(struct ti_port *tport)
1182 {
1183         int count, result;
1184         struct usb_serial_port *port = tport->tp_port;
1185         unsigned long flags;
1186
1187         spin_lock_irqsave(&tport->tp_lock, flags);
1188
1189         if (tport->tp_write_urb_in_use)
1190                 goto unlock;
1191
1192         count = kfifo_out(&tport->write_fifo,
1193                                 port->write_urb->transfer_buffer,
1194                                 port->bulk_out_size);
1195
1196         if (count == 0)
1197                 goto unlock;
1198
1199         tport->tp_write_urb_in_use = 1;
1200
1201         spin_unlock_irqrestore(&tport->tp_lock, flags);
1202
1203         usb_serial_debug_data(&port->dev, __func__, count,
1204                               port->write_urb->transfer_buffer);
1205
1206         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1207                            usb_sndbulkpipe(port->serial->dev,
1208                                             port->bulk_out_endpointAddress),
1209                            port->write_urb->transfer_buffer, count,
1210                            ti_bulk_out_callback, tport);
1211
1212         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1213         if (result) {
1214                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1215                                                         __func__, result);
1216                 tport->tp_write_urb_in_use = 0;
1217                 /* TODO: reschedule ti_send */
1218         } else {
1219                 spin_lock_irqsave(&tport->tp_lock, flags);
1220                 port->icount.tx += count;
1221                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1222         }
1223
1224         /* more room in the buffer for new writes, wakeup */
1225         tty_port_tty_wakeup(&port->port);
1226
1227         wake_up_interruptible(&tport->tp_write_wait);
1228         return;
1229 unlock:
1230         spin_unlock_irqrestore(&tport->tp_lock, flags);
1231         return;
1232 }
1233
1234
1235 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1236 {
1237         unsigned long flags;
1238         int status;
1239
1240         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1241                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1242                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1243
1244         spin_lock_irqsave(&tport->tp_lock, flags);
1245         if (!status)
1246                 tport->tp_shadow_mcr = mcr;
1247         spin_unlock_irqrestore(&tport->tp_lock, flags);
1248
1249         return status;
1250 }
1251
1252
1253 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1254 {
1255         int size, status;
1256         struct ti_device *tdev = tport->tp_tdev;
1257         struct usb_serial_port *port = tport->tp_port;
1258         int port_number = port->number - port->serial->minor;
1259         struct ti_port_status *data;
1260
1261         size = sizeof(struct ti_port_status);
1262         data = kmalloc(size, GFP_KERNEL);
1263         if (!data) {
1264                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1265                 return -ENOMEM;
1266         }
1267
1268         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1269                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1270         if (status) {
1271                 dev_err(&port->dev,
1272                         "%s - get port status command failed, %d\n",
1273                                                         __func__, status);
1274                 goto free_data;
1275         }
1276
1277         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1278
1279         *lsr = data->bLSR;
1280
1281 free_data:
1282         kfree(data);
1283         return status;
1284 }
1285
1286
1287 static int ti_get_serial_info(struct ti_port *tport,
1288         struct serial_struct __user *ret_arg)
1289 {
1290         struct usb_serial_port *port = tport->tp_port;
1291         struct serial_struct ret_serial;
1292         unsigned cwait;
1293
1294         if (!ret_arg)
1295                 return -EFAULT;
1296
1297         cwait = port->port.closing_wait;
1298         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1299                 cwait = jiffies_to_msecs(cwait) / 10;
1300
1301         memset(&ret_serial, 0, sizeof(ret_serial));
1302
1303         ret_serial.type = PORT_16550A;
1304         ret_serial.line = port->serial->minor;
1305         ret_serial.port = port->number - port->serial->minor;
1306         ret_serial.flags = tport->tp_flags;
1307         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1308         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1309         ret_serial.closing_wait = cwait;
1310
1311         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1312                 return -EFAULT;
1313
1314         return 0;
1315 }
1316
1317
1318 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1319         struct serial_struct __user *new_arg)
1320 {
1321         struct serial_struct new_serial;
1322         unsigned cwait;
1323
1324         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1325                 return -EFAULT;
1326
1327         cwait = new_serial.closing_wait;
1328         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1329                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1330
1331         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1332         tport->tp_port->port.closing_wait = cwait;
1333
1334         return 0;
1335 }
1336
1337
1338 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1339 {
1340         struct async_icount *icount;
1341         struct tty_struct *tty;
1342         unsigned long flags;
1343
1344         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1345
1346         if (msr & TI_MSR_DELTA_MASK) {
1347                 spin_lock_irqsave(&tport->tp_lock, flags);
1348                 icount = &tport->tp_port->icount;
1349                 if (msr & TI_MSR_DELTA_CTS)
1350                         icount->cts++;
1351                 if (msr & TI_MSR_DELTA_DSR)
1352                         icount->dsr++;
1353                 if (msr & TI_MSR_DELTA_CD)
1354                         icount->dcd++;
1355                 if (msr & TI_MSR_DELTA_RI)
1356                         icount->rng++;
1357                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1358                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1359         }
1360
1361         tport->tp_msr = msr & TI_MSR_MASK;
1362
1363         /* handle CTS flow control */
1364         tty = tty_port_tty_get(&tport->tp_port->port);
1365         if (tty && C_CRTSCTS(tty)) {
1366                 if (msr & TI_MSR_CTS) {
1367                         tty->hw_stopped = 0;
1368                         tty_wakeup(tty);
1369                 } else {
1370                         tty->hw_stopped = 1;
1371                 }
1372         }
1373         tty_kref_put(tty);
1374 }
1375
1376
1377 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1378 {
1379         unsigned long flags;
1380
1381         spin_lock_irqsave(&tport->tp_lock, flags);
1382
1383         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1384                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1385
1386         spin_unlock_irqrestore(&tport->tp_lock, flags);
1387 }
1388
1389
1390 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1391 {
1392         struct urb *urb;
1393         int status = 0;
1394         unsigned long flags;
1395
1396         spin_lock_irqsave(&tport->tp_lock, flags);
1397
1398         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1399                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1400                 urb = tport->tp_port->read_urb;
1401                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1402                 urb->context = tport;
1403                 status = usb_submit_urb(urb, GFP_KERNEL);
1404         } else  {
1405                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1406                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1407         }
1408
1409         return status;
1410 }
1411
1412
1413 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1414         __u16 moduleid, __u16 value, __u8 *data, int size)
1415 {
1416         int status;
1417
1418         status = usb_control_msg(tdev->td_serial->dev,
1419                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1420                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1421                 value, moduleid, data, size, 1000);
1422
1423         if (status == size)
1424                 status = 0;
1425
1426         if (status > 0)
1427                 status = -ECOMM;
1428
1429         return status;
1430 }
1431
1432
1433 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1434         __u16 moduleid, __u16 value, __u8 *data, int size)
1435 {
1436         int status;
1437
1438         status = usb_control_msg(tdev->td_serial->dev,
1439                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1440                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1441                 value, moduleid, data, size, 1000);
1442
1443         if (status == size)
1444                 status = 0;
1445
1446         if (status > 0)
1447                 status = -ECOMM;
1448
1449         return status;
1450 }
1451
1452
1453 static int ti_write_byte(struct usb_serial_port *port,
1454                         struct ti_device *tdev, unsigned long addr,
1455                         __u8 mask, __u8 byte)
1456 {
1457         int status;
1458         unsigned int size;
1459         struct ti_write_data_bytes *data;
1460
1461         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1462                 addr, mask, byte);
1463
1464         size = sizeof(struct ti_write_data_bytes) + 2;
1465         data = kmalloc(size, GFP_KERNEL);
1466         if (!data) {
1467                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1468                 return -ENOMEM;
1469         }
1470
1471         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1472         data->bDataType = TI_RW_DATA_BYTE;
1473         data->bDataCounter = 1;
1474         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1475         data->wBaseAddrLo = cpu_to_be16(addr);
1476         data->bData[0] = mask;
1477         data->bData[1] = byte;
1478
1479         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1480                 (__u8 *)data, size);
1481
1482         if (status < 0)
1483                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1484
1485         kfree(data);
1486
1487         return status;
1488 }
1489
1490 static int ti_do_download(struct usb_device *dev, int pipe,
1491                                                 u8 *buffer, int size)
1492 {
1493         int pos;
1494         u8 cs = 0;
1495         int done;
1496         struct ti_firmware_header *header;
1497         int status = 0;
1498         int len;
1499
1500         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1501                 cs = (__u8)(cs + buffer[pos]);
1502
1503         header = (struct ti_firmware_header *)buffer;
1504         header->wLength = cpu_to_le16((__u16)(size
1505                                         - sizeof(struct ti_firmware_header)));
1506         header->bCheckSum = cs;
1507
1508         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1509         for (pos = 0; pos < size; pos += done) {
1510                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1511                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1512                                                                 &done, 1000);
1513                 if (status)
1514                         break;
1515         }
1516         return status;
1517 }
1518
1519 static int ti_download_firmware(struct ti_device *tdev)
1520 {
1521         int status;
1522         int buffer_size;
1523         __u8 *buffer;
1524         struct usb_device *dev = tdev->td_serial->dev;
1525         unsigned int pipe = usb_sndbulkpipe(dev,
1526                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1527         const struct firmware *fw_p;
1528         char buf[32];
1529
1530         /* try ID specific firmware first, then try generic firmware */
1531         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1532             dev->descriptor.idProduct);
1533         status = request_firmware(&fw_p, buf, &dev->dev);
1534
1535         if (status != 0) {
1536                 buf[0] = '\0';
1537                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1538                         switch (dev->descriptor.idProduct) {
1539                         case MTS_CDMA_PRODUCT_ID:
1540                                 strcpy(buf, "mts_cdma.fw");
1541                                 break;
1542                         case MTS_GSM_PRODUCT_ID:
1543                                 strcpy(buf, "mts_gsm.fw");
1544                                 break;
1545                         case MTS_EDGE_PRODUCT_ID:
1546                                 strcpy(buf, "mts_edge.fw");
1547                                 break;
1548                         case MTS_MT9234MU_PRODUCT_ID:
1549                                 strcpy(buf, "mts_mt9234mu.fw");
1550                                 break;
1551                         case MTS_MT9234ZBA_PRODUCT_ID:
1552                                 strcpy(buf, "mts_mt9234zba.fw");
1553                                 break;
1554                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1555                                 strcpy(buf, "mts_mt9234zba.fw");
1556                                 break;                  }
1557                 }
1558                 if (buf[0] == '\0') {
1559                         if (tdev->td_is_3410)
1560                                 strcpy(buf, "ti_3410.fw");
1561                         else
1562                                 strcpy(buf, "ti_5052.fw");
1563                 }
1564                 status = request_firmware(&fw_p, buf, &dev->dev);
1565         }
1566         if (status) {
1567                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1568                 return -ENOENT;
1569         }
1570         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1571                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1572                 release_firmware(fw_p);
1573                 return -ENOENT;
1574         }
1575
1576         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1577         buffer = kmalloc(buffer_size, GFP_KERNEL);
1578         if (buffer) {
1579                 memcpy(buffer, fw_p->data, fw_p->size);
1580                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1581                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1582                 kfree(buffer);
1583         } else {
1584                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1585                 status = -ENOMEM;
1586         }
1587         release_firmware(fw_p);
1588         if (status) {
1589                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1590                                                         __func__, status);
1591                 return status;
1592         }
1593
1594         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1595
1596         return 0;
1597 }