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_PRODUCT_ID) },
 176         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 177 };
 178
 179 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 180         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 181         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 182         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 183         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 184 };
 185
 186 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 187         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 189         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 190         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 191         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 192         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 193         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 194         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 197         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 198         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 199         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 200         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 201         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 202         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 203         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 204         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 206         { }
 207 };
 208
 209 static struct usb_serial_driver ti_1port_device = {
 210         .driver = {
 211                 .owner          = THIS_MODULE,
 212                 .name           = "ti_usb_3410_5052_1",
 213         },
 214         .description            = "TI USB 3410 1 port adapter",
 215         .id_table               = ti_id_table_3410,
 216         .num_ports              = 1,
 217         .attach                 = ti_startup,
 218         .release                = ti_release,
 219         .port_probe             = ti_port_probe,
 220         .port_remove            = ti_port_remove,
 221         .open                   = ti_open,
 222         .close                  = ti_close,
 223         .write                  = ti_write,
 224         .write_room             = ti_write_room,
 225         .chars_in_buffer        = ti_chars_in_buffer,
 226         .tx_empty               = ti_tx_empty,
 227         .throttle               = ti_throttle,
 228         .unthrottle             = ti_unthrottle,
 229         .ioctl                  = ti_ioctl,
 230         .set_termios            = ti_set_termios,
 231         .tiocmget               = ti_tiocmget,
 232         .tiocmset               = ti_tiocmset,
 233         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 234         .get_icount             = usb_serial_generic_get_icount,
 235         .break_ctl              = ti_break,
 236         .read_int_callback      = ti_interrupt_callback,
 237         .read_bulk_callback     = ti_bulk_in_callback,
 238         .write_bulk_callback    = ti_bulk_out_callback,
 239 };
 240
 241 static struct usb_serial_driver ti_2port_device = {
 242         .driver = {
 243                 .owner          = THIS_MODULE,
 244                 .name           = "ti_usb_3410_5052_2",
 245         },
 246         .description            = "TI USB 5052 2 port adapter",
 247         .id_table               = ti_id_table_5052,
 248         .num_ports              = 2,
 249         .attach                 = ti_startup,
 250         .release                = ti_release,
 251         .port_probe             = ti_port_probe,
 252         .port_remove            = ti_port_remove,
 253         .open                   = ti_open,
 254         .close                  = ti_close,
 255         .write                  = ti_write,
 256         .write_room             = ti_write_room,
 257         .chars_in_buffer        = ti_chars_in_buffer,
 258         .tx_empty               = ti_tx_empty,
 259         .throttle               = ti_throttle,
 260         .unthrottle             = ti_unthrottle,
 261         .ioctl                  = ti_ioctl,
 262         .set_termios            = ti_set_termios,
 263         .tiocmget               = ti_tiocmget,
 264         .tiocmset               = ti_tiocmset,
 265         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 266         .get_icount             = usb_serial_generic_get_icount,
 267         .break_ctl              = ti_break,
 268         .read_int_callback      = ti_interrupt_callback,
 269         .read_bulk_callback     = ti_bulk_in_callback,
 270         .write_bulk_callback    = ti_bulk_out_callback,
 271 };
 272
 273 static struct usb_serial_driver * const serial_drivers[] = {
 274         &ti_1port_device, &ti_2port_device, NULL
 275 };
 276
 277 /* Module */
 278
 279 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 280 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 281 MODULE_LICENSE("GPL");
 282
 283 MODULE_FIRMWARE("ti_3410.fw");
 284 MODULE_FIRMWARE("ti_5052.fw");
 285 MODULE_FIRMWARE("mts_cdma.fw");
 286 MODULE_FIRMWARE("mts_gsm.fw");
 287 MODULE_FIRMWARE("mts_edge.fw");
 288 MODULE_FIRMWARE("mts_mt9234mu.fw");
 289 MODULE_FIRMWARE("mts_mt9234zba.fw");
 290
 291 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 292 MODULE_PARM_DESC(closing_wait,
 293     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 294
 295 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 296 MODULE_PARM_DESC(vendor_3410,
 297                 "Vendor ids for 3410 based devices, 1-5 short integers");
 298 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 299 MODULE_PARM_DESC(product_3410,
 300                 "Product ids for 3410 based devices, 1-5 short integers");
 301 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 302 MODULE_PARM_DESC(vendor_5052,
 303                 "Vendor ids for 5052 based devices, 1-5 short integers");
 304 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 305 MODULE_PARM_DESC(product_5052,
 306                 "Product ids for 5052 based devices, 1-5 short integers");
 307
 308 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 309
 310
 311 /* Functions */
 312
 313 static int __init ti_init(void)
 314 {
 315         int i, j, c;
 316
 317         /* insert extra vendor and product ids */
 318         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 319         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 320         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 321                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 322                 ti_id_table_3410[j].idProduct = product_3410[i];
 323                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 324                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 325                 ti_id_table_combined[c].idProduct = product_3410[i];
 326                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 327         }
 328         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 329         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 330                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 331                 ti_id_table_5052[j].idProduct = product_5052[i];
 332                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 333                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 334                 ti_id_table_combined[c].idProduct = product_5052[i];
 335                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 336         }
 337
 338         return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 339 }
 340
 341 static void __exit ti_exit(void)
 342 {
 343         usb_serial_deregister_drivers(serial_drivers);
 344 }
 345
 346 module_init(ti_init);
 347 module_exit(ti_exit);
 348
 349
 350 static int ti_startup(struct usb_serial *serial)
 351 {
 352         struct ti_device *tdev;
 353         struct usb_device *dev = serial->dev;
 354         int status;
 355
 356         dev_dbg(&dev->dev,
 357                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 358                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 359                 dev->descriptor.bNumConfigurations,
 360                 dev->actconfig->desc.bConfigurationValue);
 361
 362         /* create device structure */
 363         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 364         if (tdev == NULL) {
 365                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 366                 return -ENOMEM;
 367         }
 368         mutex_init(&tdev->td_open_close_lock);
 369         tdev->td_serial = serial;
 370         usb_set_serial_data(serial, tdev);
 371
 372         /* determine device type */
 373         if (usb_match_id(serial->interface, ti_id_table_3410))
 374                 tdev->td_is_3410 = 1;
 375         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 376                 tdev->td_is_3410 ? "3410" : "5052");
 377
 378         /* if we have only 1 configuration, download firmware */
 379         if (dev->descriptor.bNumConfigurations == 1) {
 380                 status = ti_download_firmware(tdev);
 381
 382                 if (status != 0)
 383                         goto free_tdev;
 384
 385                 /* 3410 must be reset, 5052 resets itself */
 386                 if (tdev->td_is_3410) {
 387                         msleep_interruptible(100);
 388                         usb_reset_device(dev);
 389                 }
 390
 391                 status = -ENODEV;
 392                 goto free_tdev;
 393         }
 394
 395         /* the second configuration must be set */
 396         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 397                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 398                 status = status ? status : -ENODEV;
 399                 goto free_tdev;
 400         }
 401
 402         return 0;
 403
 404 free_tdev:
 405         kfree(tdev);
 406         usb_set_serial_data(serial, NULL);
 407         return status;
 408 }
 409
 410
 411 static void ti_release(struct usb_serial *serial)
 412 {
 413         struct ti_device *tdev = usb_get_serial_data(serial);
 414
 415         kfree(tdev);
 416 }
 417
 418 static int ti_port_probe(struct usb_serial_port *port)
 419 {
 420         struct ti_port *tport;
 421
 422         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 423         if (!tport)
 424                 return -ENOMEM;
 425
 426         spin_lock_init(&tport->tp_lock);
 427         if (port == port->serial->port[0])
 428                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 429         else
 430                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 431         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 432         init_waitqueue_head(&tport->tp_write_wait);
 433         if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
 434                 kfree(tport);
 435                 return -ENOMEM;
 436         }
 437         tport->tp_port = port;
 438         tport->tp_tdev = usb_get_serial_data(port->serial);
 439         tport->tp_uart_mode = 0;        /* default is RS232 */
 440
 441         usb_set_serial_port_data(port, tport);
 442
 443         return 0;
 444 }
 445
 446 static int ti_port_remove(struct usb_serial_port *port)
 447 {
 448         struct ti_port *tport;
 449
 450         tport = usb_get_serial_port_data(port);
 451         kfifo_free(&tport->write_fifo);
 452         kfree(tport);
 453
 454         return 0;
 455 }
 456
 457 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 458 {
 459         struct ti_port *tport = usb_get_serial_port_data(port);
 460         struct ti_device *tdev;
 461         struct usb_device *dev;
 462         struct urb *urb;
 463         int port_number;
 464         int status;
 465         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 466                              TI_PIPE_TIMEOUT_ENABLE |
 467                              (TI_TRANSFER_TIMEOUT << 2));
 468
 469         if (tport == NULL)
 470                 return -ENODEV;
 471
 472         dev = port->serial->dev;
 473         tdev = tport->tp_tdev;
 474
 475         /* only one open on any port on a device at a time */
 476         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 477                 return -ERESTARTSYS;
 478
 479         port_number = port->number - port->serial->minor;
 480
 481         tport->tp_msr = 0;
 482         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 483
 484         /* start interrupt urb the first time a port is opened on this device */
 485         if (tdev->td_open_port_count == 0) {
 486                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 487                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 488                 if (!urb) {
 489                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 490                         status = -EINVAL;
 491                         goto release_lock;
 492                 }
 493                 urb->context = tdev;
 494                 status = usb_submit_urb(urb, GFP_KERNEL);
 495                 if (status) {
 496                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 497                         goto release_lock;
 498                 }
 499         }
 500
 501         if (tty)
 502                 ti_set_termios(tty, port, &tty->termios);
 503
 504         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 505         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 506                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 507         if (status) {
 508                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 509                         __func__, status);
 510                 goto unlink_int_urb;
 511         }
 512
 513         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 514         status = ti_command_out_sync(tdev, TI_START_PORT,
 515                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 516         if (status) {
 517                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 518                                                         __func__, status);
 519                 goto unlink_int_urb;
 520         }
 521
 522         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 523         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 524                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 525         if (status) {
 526                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 527                                                         __func__, status);
 528                 goto unlink_int_urb;
 529         }
 530         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 531                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 532         if (status) {
 533                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 534                                                         __func__, status);
 535                 goto unlink_int_urb;
 536         }
 537
 538         /* reset the data toggle on the bulk endpoints to work around bug in
 539          * host controllers where things get out of sync some times */
 540         usb_clear_halt(dev, port->write_urb->pipe);
 541         usb_clear_halt(dev, port->read_urb->pipe);
 542
 543         if (tty)
 544                 ti_set_termios(tty, port, &tty->termios);
 545
 546         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 547         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 548                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 549         if (status) {
 550                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 551                                                         __func__, status);
 552                 goto unlink_int_urb;
 553         }
 554
 555         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 556         status = ti_command_out_sync(tdev, TI_START_PORT,
 557                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 558         if (status) {
 559                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 560                                                         __func__, status);
 561                 goto unlink_int_urb;
 562         }
 563
 564         /* start read urb */
 565         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 566         urb = port->read_urb;
 567         if (!urb) {
 568                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 569                 status = -EINVAL;
 570                 goto unlink_int_urb;
 571         }
 572         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 573         urb->context = tport;
 574         status = usb_submit_urb(urb, GFP_KERNEL);
 575         if (status) {
 576                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 577                                                         __func__, status);
 578                 goto unlink_int_urb;
 579         }
 580
 581         tport->tp_is_open = 1;
 582         ++tdev->td_open_port_count;
 583
 584         port->port.drain_delay = 3;
 585
 586         goto release_lock;
 587
 588 unlink_int_urb:
 589         if (tdev->td_open_port_count == 0)
 590                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 591 release_lock:
 592         mutex_unlock(&tdev->td_open_close_lock);
 593         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 594         return status;
 595 }
 596
 597
 598 static void ti_close(struct usb_serial_port *port)
 599 {
 600         struct ti_device *tdev;
 601         struct ti_port *tport;
 602         int port_number;
 603         int status;
 604         int do_unlock;
 605         unsigned long flags;
 606
 607         tdev = usb_get_serial_data(port->serial);
 608         tport = usb_get_serial_port_data(port);
 609         if (tdev == NULL || tport == NULL)
 610                 return;
 611
 612         tport->tp_is_open = 0;
 613
 614         usb_kill_urb(port->read_urb);
 615         usb_kill_urb(port->write_urb);
 616         tport->tp_write_urb_in_use = 0;
 617         spin_lock_irqsave(&tport->tp_lock, flags);
 618         kfifo_reset_out(&tport->write_fifo);
 619         spin_unlock_irqrestore(&tport->tp_lock, flags);
 620
 621         port_number = port->number - port->serial->minor;
 622
 623         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 624         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 625                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 626         if (status)
 627                 dev_err(&port->dev,
 628                         "%s - cannot send close port command, %d\n"
 629                                                         , __func__, status);
 630
 631         /* if mutex_lock is interrupted, continue anyway */
 632         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 633         --tport->tp_tdev->td_open_port_count;
 634         if (tport->tp_tdev->td_open_port_count <= 0) {
 635                 /* last port is closed, shut down interrupt urb */
 636                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 637                 tport->tp_tdev->td_open_port_count = 0;
 638         }
 639         if (do_unlock)
 640                 mutex_unlock(&tdev->td_open_close_lock);
 641 }
 642
 643
 644 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 645                         const unsigned char *data, int count)
 646 {
 647         struct ti_port *tport = usb_get_serial_port_data(port);
 648
 649         if (count == 0) {
 650                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 651                 return 0;
 652         }
 653
 654         if (tport == NULL || !tport->tp_is_open)
 655                 return -ENODEV;
 656
 657         count = kfifo_in_locked(&tport->write_fifo, data, count,
 658                                                         &tport->tp_lock);
 659         ti_send(tport);
 660
 661         return count;
 662 }
 663
 664
 665 static int ti_write_room(struct tty_struct *tty)
 666 {
 667         struct usb_serial_port *port = tty->driver_data;
 668         struct ti_port *tport = usb_get_serial_port_data(port);
 669         int room = 0;
 670         unsigned long flags;
 671
 672         if (tport == NULL)
 673                 return 0;
 674
 675         spin_lock_irqsave(&tport->tp_lock, flags);
 676         room = kfifo_avail(&tport->write_fifo);
 677         spin_unlock_irqrestore(&tport->tp_lock, flags);
 678
 679         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 680         return room;
 681 }
 682
 683
 684 static int ti_chars_in_buffer(struct tty_struct *tty)
 685 {
 686         struct usb_serial_port *port = tty->driver_data;
 687         struct ti_port *tport = usb_get_serial_port_data(port);
 688         int chars = 0;
 689         unsigned long flags;
 690
 691         if (tport == NULL)
 692                 return 0;
 693
 694         spin_lock_irqsave(&tport->tp_lock, flags);
 695         chars = kfifo_len(&tport->write_fifo);
 696         spin_unlock_irqrestore(&tport->tp_lock, flags);
 697
 698         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 699         return chars;
 700 }
 701
 702 static bool ti_tx_empty(struct usb_serial_port *port)
 703 {
 704         struct ti_port *tport = usb_get_serial_port_data(port);
 705         int ret;
 706         u8 lsr;
 707
 708         ret = ti_get_lsr(tport, &lsr);
 709         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 710                 return false;
 711
 712         return true;
 713 }
 714
 715 static void ti_throttle(struct tty_struct *tty)
 716 {
 717         struct usb_serial_port *port = tty->driver_data;
 718         struct ti_port *tport = usb_get_serial_port_data(port);
 719
 720         if (tport == NULL)
 721                 return;
 722
 723         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 724                 ti_stop_read(tport, tty);
 725
 726 }
 727
 728
 729 static void ti_unthrottle(struct tty_struct *tty)
 730 {
 731         struct usb_serial_port *port = tty->driver_data;
 732         struct ti_port *tport = usb_get_serial_port_data(port);
 733         int status;
 734
 735         if (tport == NULL)
 736                 return;
 737
 738         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 739                 status = ti_restart_read(tport, tty);
 740                 if (status)
 741                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 742                                                         __func__, status);
 743         }
 744 }
 745
 746 static int ti_ioctl(struct tty_struct *tty,
 747         unsigned int cmd, unsigned long arg)
 748 {
 749         struct usb_serial_port *port = tty->driver_data;
 750         struct ti_port *tport = usb_get_serial_port_data(port);
 751
 752         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 753
 754         if (tport == NULL)
 755                 return -ENODEV;
 756
 757         switch (cmd) {
 758         case TIOCGSERIAL:
 759                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 760                 return ti_get_serial_info(tport,
 761                                 (struct serial_struct __user *)arg);
 762         case TIOCSSERIAL:
 763                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 764                 return ti_set_serial_info(tty, tport,
 765                                 (struct serial_struct __user *)arg);
 766         }
 767         return -ENOIOCTLCMD;
 768 }
 769
 770
 771 static void ti_set_termios(struct tty_struct *tty,
 772                 struct usb_serial_port *port, struct ktermios *old_termios)
 773 {
 774         struct ti_port *tport = usb_get_serial_port_data(port);
 775         struct ti_uart_config *config;
 776         tcflag_t cflag, iflag;
 777         int baud;
 778         int status;
 779         int port_number = port->number - port->serial->minor;
 780         unsigned int mcr;
 781
 782         cflag = tty->termios.c_cflag;
 783         iflag = tty->termios.c_iflag;
 784
 785         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 786         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 787                 old_termios->c_cflag, old_termios->c_iflag);
 788
 789         if (tport == NULL)
 790                 return;
 791
 792         config = kmalloc(sizeof(*config), GFP_KERNEL);
 793         if (!config) {
 794                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 795                 return;
 796         }
 797
 798         config->wFlags = 0;
 799
 800         /* these flags must be set */
 801         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 802         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 803         config->bUartMode = (__u8)(tport->tp_uart_mode);
 804
 805         switch (cflag & CSIZE) {
 806         case CS5:
 807                     config->bDataBits = TI_UART_5_DATA_BITS;
 808                     break;
 809         case CS6:
 810                     config->bDataBits = TI_UART_6_DATA_BITS;
 811                     break;
 812         case CS7:
 813                     config->bDataBits = TI_UART_7_DATA_BITS;
 814                     break;
 815         default:
 816         case CS8:
 817                     config->bDataBits = TI_UART_8_DATA_BITS;
 818                     break;
 819         }
 820
 821         /* CMSPAR isn't supported by this driver */
 822         tty->termios.c_cflag &= ~CMSPAR;
 823
 824         if (cflag & PARENB) {
 825                 if (cflag & PARODD) {
 826                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 827                         config->bParity = TI_UART_ODD_PARITY;
 828                 } else {
 829                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 830                         config->bParity = TI_UART_EVEN_PARITY;
 831                 }
 832         } else {
 833                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 834                 config->bParity = TI_UART_NO_PARITY;
 835         }
 836
 837         if (cflag & CSTOPB)
 838                 config->bStopBits = TI_UART_2_STOP_BITS;
 839         else
 840                 config->bStopBits = TI_UART_1_STOP_BITS;
 841
 842         if (cflag & CRTSCTS) {
 843                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 844                 if ((cflag & CBAUD) != B0)
 845                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 846                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 847         } else {
 848                 tty->hw_stopped = 0;
 849                 ti_restart_read(tport, tty);
 850         }
 851
 852         if (I_IXOFF(tty) || I_IXON(tty)) {
 853                 config->cXon  = START_CHAR(tty);
 854                 config->cXoff = STOP_CHAR(tty);
 855
 856                 if (I_IXOFF(tty))
 857                         config->wFlags |= TI_UART_ENABLE_X_IN;
 858                 else
 859                         ti_restart_read(tport, tty);
 860
 861                 if (I_IXON(tty))
 862                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 863         }
 864
 865         baud = tty_get_baud_rate(tty);
 866         if (!baud)
 867                 baud = 9600;
 868         if (tport->tp_tdev->td_is_3410)
 869                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 870         else
 871                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 872
 873         /* FIXME: Should calculate resulting baud here and report it back */
 874         if ((cflag & CBAUD) != B0)
 875                 tty_encode_baud_rate(tty, baud, baud);
 876
 877         dev_dbg(&port->dev,
 878                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 879                 __func__, baud, config->wBaudRate, config->wFlags,
 880                 config->bDataBits, config->bParity, config->bStopBits,
 881                 config->cXon, config->cXoff, config->bUartMode);
 882
 883         cpu_to_be16s(&config->wBaudRate);
 884         cpu_to_be16s(&config->wFlags);
 885
 886         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 887                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 888                 sizeof(*config));
 889         if (status)
 890                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 891                                         __func__, port_number, status);
 892
 893         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 894         mcr = tport->tp_shadow_mcr;
 895         /* if baud rate is B0, clear RTS and DTR */
 896         if ((cflag & CBAUD) == B0)
 897                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 898         status = ti_set_mcr(tport, mcr);
 899         if (status)
 900                 dev_err(&port->dev,
 901                         "%s - cannot set modem control on port %d, %d\n",
 902                                                 __func__, port_number, status);
 903
 904         kfree(config);
 905 }
 906
 907
 908 static int ti_tiocmget(struct tty_struct *tty)
 909 {
 910         struct usb_serial_port *port = tty->driver_data;
 911         struct ti_port *tport = usb_get_serial_port_data(port);
 912         unsigned int result;
 913         unsigned int msr;
 914         unsigned int mcr;
 915         unsigned long flags;
 916
 917         if (tport == NULL)
 918                 return -ENODEV;
 919
 920         spin_lock_irqsave(&tport->tp_lock, flags);
 921         msr = tport->tp_msr;
 922         mcr = tport->tp_shadow_mcr;
 923         spin_unlock_irqrestore(&tport->tp_lock, flags);
 924
 925         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 926                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 927                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 928                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 929                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 930                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 931                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 932
 933         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 934
 935         return result;
 936 }
 937
 938
 939 static int ti_tiocmset(struct tty_struct *tty,
 940                                 unsigned int set, unsigned int clear)
 941 {
 942         struct usb_serial_port *port = tty->driver_data;
 943         struct ti_port *tport = usb_get_serial_port_data(port);
 944         unsigned int mcr;
 945         unsigned long flags;
 946
 947         if (tport == NULL)
 948                 return -ENODEV;
 949
 950         spin_lock_irqsave(&tport->tp_lock, flags);
 951         mcr = tport->tp_shadow_mcr;
 952
 953         if (set & TIOCM_RTS)
 954                 mcr |= TI_MCR_RTS;
 955         if (set & TIOCM_DTR)
 956                 mcr |= TI_MCR_DTR;
 957         if (set & TIOCM_LOOP)
 958                 mcr |= TI_MCR_LOOP;
 959
 960         if (clear & TIOCM_RTS)
 961                 mcr &= ~TI_MCR_RTS;
 962         if (clear & TIOCM_DTR)
 963                 mcr &= ~TI_MCR_DTR;
 964         if (clear & TIOCM_LOOP)
 965                 mcr &= ~TI_MCR_LOOP;
 966         spin_unlock_irqrestore(&tport->tp_lock, flags);
 967
 968         return ti_set_mcr(tport, mcr);
 969 }
 970
 971
 972 static void ti_break(struct tty_struct *tty, int break_state)
 973 {
 974         struct usb_serial_port *port = tty->driver_data;
 975         struct ti_port *tport = usb_get_serial_port_data(port);
 976         int status;
 977
 978         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 979
 980         if (tport == NULL)
 981                 return;
 982
 983         status = ti_write_byte(port, tport->tp_tdev,
 984                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 985                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 986
 987         if (status)
 988                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 989 }
 990
 991
 992 static void ti_interrupt_callback(struct urb *urb)
 993 {
 994         struct ti_device *tdev = urb->context;
 995         struct usb_serial_port *port;
 996         struct usb_serial *serial = tdev->td_serial;
 997         struct ti_port *tport;
 998         struct device *dev = &urb->dev->dev;
 999         unsigned char *data = urb->transfer_buffer;
1000         int length = urb->actual_length;
1001         int port_number;
1002         int function;
1003         int status = urb->status;
1004         int retval;
1005         __u8 msr;
1006
1007         switch (status) {
1008         case 0:
1009                 break;
1010         case -ECONNRESET:
1011         case -ENOENT:
1012         case -ESHUTDOWN:
1013                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1014                 tdev->td_urb_error = 1;
1015                 return;
1016         default:
1017                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1018                 tdev->td_urb_error = 1;
1019                 goto exit;
1020         }
1021
1022         if (length != 2) {
1023                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1024                 goto exit;
1025         }
1026
1027         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1028                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1029                 goto exit;
1030         }
1031
1032         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1033         function = TI_GET_FUNC_FROM_CODE(data[0]);
1034
1035         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1036                 __func__, port_number, function, data[1]);
1037
1038         if (port_number >= serial->num_ports) {
1039                 dev_err(dev, "%s - bad port number, %d\n",
1040                                                 __func__, port_number);
1041                 goto exit;
1042         }
1043
1044         port = serial->port[port_number];
1045
1046         tport = usb_get_serial_port_data(port);
1047         if (!tport)
1048                 goto exit;
1049
1050         switch (function) {
1051         case TI_CODE_DATA_ERROR:
1052                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1053                         __func__, port_number, data[1]);
1054                 break;
1055
1056         case TI_CODE_MODEM_STATUS:
1057                 msr = data[1];
1058                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1059                 ti_handle_new_msr(tport, msr);
1060                 break;
1061
1062         default:
1063                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1064                                                         __func__, data[1]);
1065                 break;
1066         }
1067
1068 exit:
1069         retval = usb_submit_urb(urb, GFP_ATOMIC);
1070         if (retval)
1071                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1072                         __func__, retval);
1073 }
1074
1075
1076 static void ti_bulk_in_callback(struct urb *urb)
1077 {
1078         struct ti_port *tport = urb->context;
1079         struct usb_serial_port *port = tport->tp_port;
1080         struct device *dev = &urb->dev->dev;
1081         int status = urb->status;
1082         int retval = 0;
1083
1084         switch (status) {
1085         case 0:
1086                 break;
1087         case -ECONNRESET:
1088         case -ENOENT:
1089         case -ESHUTDOWN:
1090                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1091                 tport->tp_tdev->td_urb_error = 1;
1092                 wake_up_interruptible(&tport->tp_write_wait);
1093                 return;
1094         default:
1095                 dev_err(dev, "%s - nonzero urb status, %d\n",
1096                         __func__, status);
1097                 tport->tp_tdev->td_urb_error = 1;
1098                 wake_up_interruptible(&tport->tp_write_wait);
1099         }
1100
1101         if (status == -EPIPE)
1102                 goto exit;
1103
1104         if (status) {
1105                 dev_err(dev, "%s - stopping read!\n", __func__);
1106                 return;
1107         }
1108
1109         if (urb->actual_length) {
1110                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1111                                       urb->transfer_buffer);
1112
1113                 if (!tport->tp_is_open)
1114                         dev_dbg(dev, "%s - port closed, dropping data\n",
1115                                 __func__);
1116                 else
1117                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1118                 spin_lock(&tport->tp_lock);
1119                 port->icount.rx += urb->actual_length;
1120                 spin_unlock(&tport->tp_lock);
1121         }
1122
1123 exit:
1124         /* continue to read unless stopping */
1125         spin_lock(&tport->tp_lock);
1126         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1127                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1128         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1129                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1130
1131         spin_unlock(&tport->tp_lock);
1132         if (retval)
1133                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1134                         __func__, retval);
1135 }
1136
1137
1138 static void ti_bulk_out_callback(struct urb *urb)
1139 {
1140         struct ti_port *tport = urb->context;
1141         struct usb_serial_port *port = tport->tp_port;
1142         int status = urb->status;
1143
1144         tport->tp_write_urb_in_use = 0;
1145
1146         switch (status) {
1147         case 0:
1148                 break;
1149         case -ECONNRESET:
1150         case -ENOENT:
1151         case -ESHUTDOWN:
1152                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1153                 tport->tp_tdev->td_urb_error = 1;
1154                 wake_up_interruptible(&tport->tp_write_wait);
1155                 return;
1156         default:
1157                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1158                         __func__, status);
1159                 tport->tp_tdev->td_urb_error = 1;
1160                 wake_up_interruptible(&tport->tp_write_wait);
1161         }
1162
1163         /* send any buffered data */
1164         ti_send(tport);
1165 }
1166
1167
1168 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1169                 int length)
1170 {
1171         int cnt;
1172
1173         do {
1174                 cnt = tty_insert_flip_string(&port->port, data, length);
1175                 if (cnt < length) {
1176                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1177                                                 __func__, length - cnt);
1178                         if (cnt == 0)
1179                                 break;
1180                 }
1181                 tty_flip_buffer_push(&port->port);
1182                 data += cnt;
1183                 length -= cnt;
1184         } while (length > 0);
1185 }
1186
1187
1188 static void ti_send(struct ti_port *tport)
1189 {
1190         int count, result;
1191         struct usb_serial_port *port = tport->tp_port;
1192         unsigned long flags;
1193
1194         spin_lock_irqsave(&tport->tp_lock, flags);
1195
1196         if (tport->tp_write_urb_in_use)
1197                 goto unlock;
1198
1199         count = kfifo_out(&tport->write_fifo,
1200                                 port->write_urb->transfer_buffer,
1201                                 port->bulk_out_size);
1202
1203         if (count == 0)
1204                 goto unlock;
1205
1206         tport->tp_write_urb_in_use = 1;
1207
1208         spin_unlock_irqrestore(&tport->tp_lock, flags);
1209
1210         usb_serial_debug_data(&port->dev, __func__, count,
1211                               port->write_urb->transfer_buffer);
1212
1213         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1214                            usb_sndbulkpipe(port->serial->dev,
1215                                             port->bulk_out_endpointAddress),
1216                            port->write_urb->transfer_buffer, count,
1217                            ti_bulk_out_callback, tport);
1218
1219         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1220         if (result) {
1221                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1222                                                         __func__, result);
1223                 tport->tp_write_urb_in_use = 0;
1224                 /* TODO: reschedule ti_send */
1225         } else {
1226                 spin_lock_irqsave(&tport->tp_lock, flags);
1227                 port->icount.tx += count;
1228                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1229         }
1230
1231         /* more room in the buffer for new writes, wakeup */
1232         tty_port_tty_wakeup(&port->port);
1233
1234         wake_up_interruptible(&tport->tp_write_wait);
1235         return;
1236 unlock:
1237         spin_unlock_irqrestore(&tport->tp_lock, flags);
1238         return;
1239 }
1240
1241
1242 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1243 {
1244         unsigned long flags;
1245         int status;
1246
1247         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1248                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1249                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1250
1251         spin_lock_irqsave(&tport->tp_lock, flags);
1252         if (!status)
1253                 tport->tp_shadow_mcr = mcr;
1254         spin_unlock_irqrestore(&tport->tp_lock, flags);
1255
1256         return status;
1257 }
1258
1259
1260 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1261 {
1262         int size, status;
1263         struct ti_device *tdev = tport->tp_tdev;
1264         struct usb_serial_port *port = tport->tp_port;
1265         int port_number = port->number - port->serial->minor;
1266         struct ti_port_status *data;
1267
1268         size = sizeof(struct ti_port_status);
1269         data = kmalloc(size, GFP_KERNEL);
1270         if (!data) {
1271                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1272                 return -ENOMEM;
1273         }
1274
1275         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1276                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1277         if (status) {
1278                 dev_err(&port->dev,
1279                         "%s - get port status command failed, %d\n",
1280                                                         __func__, status);
1281                 goto free_data;
1282         }
1283
1284         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1285
1286         *lsr = data->bLSR;
1287
1288 free_data:
1289         kfree(data);
1290         return status;
1291 }
1292
1293
1294 static int ti_get_serial_info(struct ti_port *tport,
1295         struct serial_struct __user *ret_arg)
1296 {
1297         struct usb_serial_port *port = tport->tp_port;
1298         struct serial_struct ret_serial;
1299         unsigned cwait;
1300
1301         if (!ret_arg)
1302                 return -EFAULT;
1303
1304         cwait = port->port.closing_wait;
1305         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1306                 cwait = jiffies_to_msecs(cwait) / 10;
1307
1308         memset(&ret_serial, 0, sizeof(ret_serial));
1309
1310         ret_serial.type = PORT_16550A;
1311         ret_serial.line = port->serial->minor;
1312         ret_serial.port = port->number - port->serial->minor;
1313         ret_serial.flags = tport->tp_flags;
1314         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1315         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1316         ret_serial.closing_wait = cwait;
1317
1318         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1319                 return -EFAULT;
1320
1321         return 0;
1322 }
1323
1324
1325 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1326         struct serial_struct __user *new_arg)
1327 {
1328         struct serial_struct new_serial;
1329         unsigned cwait;
1330
1331         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1332                 return -EFAULT;
1333
1334         cwait = new_serial.closing_wait;
1335         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1336                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1337
1338         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1339         tport->tp_port->port.closing_wait = cwait;
1340
1341         return 0;
1342 }
1343
1344
1345 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1346 {
1347         struct async_icount *icount;
1348         struct tty_struct *tty;
1349         unsigned long flags;
1350
1351         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1352
1353         if (msr & TI_MSR_DELTA_MASK) {
1354                 spin_lock_irqsave(&tport->tp_lock, flags);
1355                 icount = &tport->tp_port->icount;
1356                 if (msr & TI_MSR_DELTA_CTS)
1357                         icount->cts++;
1358                 if (msr & TI_MSR_DELTA_DSR)
1359                         icount->dsr++;
1360                 if (msr & TI_MSR_DELTA_CD)
1361                         icount->dcd++;
1362                 if (msr & TI_MSR_DELTA_RI)
1363                         icount->rng++;
1364                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1365                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1366         }
1367
1368         tport->tp_msr = msr & TI_MSR_MASK;
1369
1370         /* handle CTS flow control */
1371         tty = tty_port_tty_get(&tport->tp_port->port);
1372         if (tty && C_CRTSCTS(tty)) {
1373                 if (msr & TI_MSR_CTS) {
1374                         tty->hw_stopped = 0;
1375                         tty_wakeup(tty);
1376                 } else {
1377                         tty->hw_stopped = 1;
1378                 }
1379         }
1380         tty_kref_put(tty);
1381 }
1382
1383
1384 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1385 {
1386         unsigned long flags;
1387
1388         spin_lock_irqsave(&tport->tp_lock, flags);
1389
1390         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1391                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1392
1393         spin_unlock_irqrestore(&tport->tp_lock, flags);
1394 }
1395
1396
1397 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1398 {
1399         struct urb *urb;
1400         int status = 0;
1401         unsigned long flags;
1402
1403         spin_lock_irqsave(&tport->tp_lock, flags);
1404
1405         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1406                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1407                 urb = tport->tp_port->read_urb;
1408                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1409                 urb->context = tport;
1410                 status = usb_submit_urb(urb, GFP_KERNEL);
1411         } else  {
1412                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1413                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1414         }
1415
1416         return status;
1417 }
1418
1419
1420 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1421         __u16 moduleid, __u16 value, __u8 *data, int size)
1422 {
1423         int status;
1424
1425         status = usb_control_msg(tdev->td_serial->dev,
1426                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1427                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1428                 value, moduleid, data, size, 1000);
1429
1430         if (status == size)
1431                 status = 0;
1432
1433         if (status > 0)
1434                 status = -ECOMM;
1435
1436         return status;
1437 }
1438
1439
1440 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1441         __u16 moduleid, __u16 value, __u8 *data, int size)
1442 {
1443         int status;
1444
1445         status = usb_control_msg(tdev->td_serial->dev,
1446                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1447                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1448                 value, moduleid, data, size, 1000);
1449
1450         if (status == size)
1451                 status = 0;
1452
1453         if (status > 0)
1454                 status = -ECOMM;
1455
1456         return status;
1457 }
1458
1459
1460 static int ti_write_byte(struct usb_serial_port *port,
1461                         struct ti_device *tdev, unsigned long addr,
1462                         __u8 mask, __u8 byte)
1463 {
1464         int status;
1465         unsigned int size;
1466         struct ti_write_data_bytes *data;
1467
1468         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1469                 addr, mask, byte);
1470
1471         size = sizeof(struct ti_write_data_bytes) + 2;
1472         data = kmalloc(size, GFP_KERNEL);
1473         if (!data) {
1474                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1475                 return -ENOMEM;
1476         }
1477
1478         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1479         data->bDataType = TI_RW_DATA_BYTE;
1480         data->bDataCounter = 1;
1481         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1482         data->wBaseAddrLo = cpu_to_be16(addr);
1483         data->bData[0] = mask;
1484         data->bData[1] = byte;
1485
1486         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1487                 (__u8 *)data, size);
1488
1489         if (status < 0)
1490                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1491
1492         kfree(data);
1493
1494         return status;
1495 }
1496
1497 static int ti_do_download(struct usb_device *dev, int pipe,
1498                                                 u8 *buffer, int size)
1499 {
1500         int pos;
1501         u8 cs = 0;
1502         int done;
1503         struct ti_firmware_header *header;
1504         int status = 0;
1505         int len;
1506
1507         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1508                 cs = (__u8)(cs + buffer[pos]);
1509
1510         header = (struct ti_firmware_header *)buffer;
1511         header->wLength = cpu_to_le16((__u16)(size
1512                                         - sizeof(struct ti_firmware_header)));
1513         header->bCheckSum = cs;
1514
1515         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1516         for (pos = 0; pos < size; pos += done) {
1517                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1518                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1519                                                                 &done, 1000);
1520                 if (status)
1521                         break;
1522         }
1523         return status;
1524 }
1525
1526 static int ti_download_firmware(struct ti_device *tdev)
1527 {
1528         int status;
1529         int buffer_size;
1530         __u8 *buffer;
1531         struct usb_device *dev = tdev->td_serial->dev;
1532         unsigned int pipe = usb_sndbulkpipe(dev,
1533                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1534         const struct firmware *fw_p;
1535         char buf[32];
1536
1537         /* try ID specific firmware first, then try generic firmware */
1538         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1539             dev->descriptor.idProduct);
1540         status = request_firmware(&fw_p, buf, &dev->dev);
1541
1542         if (status != 0) {
1543                 buf[0] = '\0';
1544                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1545                         switch (dev->descriptor.idProduct) {
1546                         case MTS_CDMA_PRODUCT_ID:
1547                                 strcpy(buf, "mts_cdma.fw");
1548                                 break;
1549                         case MTS_GSM_PRODUCT_ID:
1550                                 strcpy(buf, "mts_gsm.fw");
1551                                 break;
1552                         case MTS_EDGE_PRODUCT_ID:
1553                                 strcpy(buf, "mts_edge.fw");
1554                                 break;
1555                         case MTS_MT9234MU_PRODUCT_ID:
1556                                 strcpy(buf, "mts_mt9234mu.fw");
1557                                 break;
1558                         case MTS_MT9234ZBA_PRODUCT_ID:
1559                                 strcpy(buf, "mts_mt9234zba.fw");
1560                                 break;
1561                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1562                                 strcpy(buf, "mts_mt9234zba.fw");
1563                                 break;                  }
1564                 }
1565                 if (buf[0] == '\0') {
1566                         if (tdev->td_is_3410)
1567                                 strcpy(buf, "ti_3410.fw");
1568                         else
1569                                 strcpy(buf, "ti_5052.fw");
1570                 }
1571                 status = request_firmware(&fw_p, buf, &dev->dev);
1572         }
1573         if (status) {
1574                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1575                 return -ENOENT;
1576         }
1577         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1578                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1579                 release_firmware(fw_p);
1580                 return -ENOENT;
1581         }
1582
1583         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1584         buffer = kmalloc(buffer_size, GFP_KERNEL);
1585         if (buffer) {
1586                 memcpy(buffer, fw_p->data, fw_p->size);
1587                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1588                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1589                 kfree(buffer);
1590         } else {
1591                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1592                 status = -ENOMEM;
1593         }
1594         release_firmware(fw_p);
1595         if (status) {
1596                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1597                                                         __func__, status);
1598                 return status;
1599         }
1600
1601         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1602
1603         return 0;
1604 }