drivers/usb/serial/ti_usb_3410_5052.c

   1 /* vi: ts=8 sw=8
   2  *
   3  * TI 3410/5052 USB Serial Driver
   4  *
   5  * Copyright (C) 2004 Texas Instruments
   6  *
   7  * This driver is based on the Linux io_ti driver, which is
   8  *   Copyright (C) 2000-2002 Inside Out Networks
   9  *   Copyright (C) 2001-2002 Greg Kroah-Hartman
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * For questions or problems with this driver, contact Texas Instruments
  17  * technical support, or Al Borchers <alborchers@steinerpoint.com>, or
  18  * Peter Berger <pberger@brimson.com>.
  19  */
  20
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/firmware.h>
  24 #include <linux/init.h>
  25 #include <linux/slab.h>
  26 #include <linux/tty.h>
  27 #include <linux/tty_driver.h>
  28 #include <linux/tty_flip.h>
  29 #include <linux/module.h>
  30 #include <linux/spinlock.h>
  31 #include <linux/ioctl.h>
  32 #include <linux/serial.h>
  33 #include <linux/kfifo.h>
  34 #include <linux/mutex.h>
  35 #include <linux/uaccess.h>
  36 #include <linux/usb.h>
  37 #include <linux/usb/serial.h>
  38
  39 #include "ti_usb_3410_5052.h"
  40
  41 /* Defines */
  42
  43 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  44 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  45
  46 #define TI_FIRMWARE_BUF_SIZE    16284
  47
  48 #define TI_WRITE_BUF_SIZE       1024
  49
  50 #define TI_TRANSFER_TIMEOUT     2
  51
  52 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  53
  54 /* supported setserial flags */
  55 #define TI_SET_SERIAL_FLAGS     0
  56
  57 /* read urb states */
  58 #define TI_READ_URB_RUNNING     0
  59 #define TI_READ_URB_STOPPING    1
  60 #define TI_READ_URB_STOPPED     2
  61
  62 #define TI_EXTRA_VID_PID_COUNT  5
  63
  64
  65 /* Structures */
  66
  67 struct ti_port {
  68         int                     tp_is_open;
  69         __u8                    tp_msr;
  70         __u8                    tp_shadow_mcr;
  71         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  72         unsigned int            tp_uart_base_addr;
  73         int                     tp_flags;
  74         wait_queue_head_t       tp_write_wait;
  75         struct ti_device        *tp_tdev;
  76         struct usb_serial_port  *tp_port;
  77         spinlock_t              tp_lock;
  78         int                     tp_read_urb_state;
  79         int                     tp_write_urb_in_use;
  80         struct kfifo            write_fifo;
  81 };
  82
  83 struct ti_device {
  84         struct mutex            td_open_close_lock;
  85         int                     td_open_port_count;
  86         struct usb_serial       *td_serial;
  87         int                     td_is_3410;
  88         int                     td_urb_error;
  89 };
  90
  91
  92 /* Function Declarations */
  93
  94 static int ti_startup(struct usb_serial *serial);
  95 static void ti_release(struct usb_serial *serial);
  96 static int ti_port_probe(struct usb_serial_port *port);
  97 static int ti_port_remove(struct usb_serial_port *port);
  98 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
  99 static void ti_close(struct usb_serial_port *port);
 100 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 101                 const unsigned char *data, int count);
 102 static int ti_write_room(struct tty_struct *tty);
 103 static int ti_chars_in_buffer(struct tty_struct *tty);
 104 static bool ti_tx_empty(struct usb_serial_port *port);
 105 static void ti_throttle(struct tty_struct *tty);
 106 static void ti_unthrottle(struct tty_struct *tty);
 107 static int ti_ioctl(struct tty_struct *tty,
 108                 unsigned int cmd, unsigned long arg);
 109 static void ti_set_termios(struct tty_struct *tty,
 110                 struct usb_serial_port *port, struct ktermios *old_termios);
 111 static int ti_tiocmget(struct tty_struct *tty);
 112 static int ti_tiocmset(struct tty_struct *tty,
 113                 unsigned int set, unsigned int clear);
 114 static void ti_break(struct tty_struct *tty, int break_state);
 115 static void ti_interrupt_callback(struct urb *urb);
 116 static void ti_bulk_in_callback(struct urb *urb);
 117 static void ti_bulk_out_callback(struct urb *urb);
 118
 119 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
 120                 int length);
 121 static void ti_send(struct ti_port *tport);
 122 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 123 static int ti_get_lsr(struct ti_port *tport, u8 *lsr);
 124 static int ti_get_serial_info(struct ti_port *tport,
 125         struct serial_struct __user *ret_arg);
 126 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 127         struct serial_struct __user *new_arg);
 128 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 129
 130 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 131 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 132
 133 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 134         __u16 moduleid, __u16 value, __u8 *data, int size);
 135 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 136         __u16 moduleid, __u16 value, __u8 *data, int size);
 137
 138 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 139                          unsigned long addr, __u8 mask, __u8 byte);
 140
 141 static int ti_download_firmware(struct ti_device *tdev);
 142
 143
 144 /* Data */
 145
 146 /* module parameters */
 147 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 148 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 149 static unsigned int vendor_3410_count;
 150 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 151 static unsigned int product_3410_count;
 152 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 153 static unsigned int vendor_5052_count;
 154 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 155 static unsigned int product_5052_count;
 156
 157 /* supported devices */
 158 /* the array dimension is the number of default entries plus */
 159 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 160 /* null entry */
 161 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
 162         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 163         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 164         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 165         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 166         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 167         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 168         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 169         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 170         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 172         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 173         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 174         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 175         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STEREO_PLUG_ID) },
 176         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 177         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 178 };
 179
 180 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 181         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 182         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 183         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 184         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 185 };
 186
 187 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 188         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 190         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 191         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 192         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 193         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 194         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 198         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 199         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 200         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 201         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 202         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 203         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 204         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 205         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 206         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_STRIP_PORT_ID) },
 207         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 208         { }
 209 };
 210
 211 static struct usb_serial_driver ti_1port_device = {
 212         .driver = {
 213                 .owner          = THIS_MODULE,
 214                 .name           = "ti_usb_3410_5052_1",
 215         },
 216         .description            = "TI USB 3410 1 port adapter",
 217         .id_table               = ti_id_table_3410,
 218         .num_ports              = 1,
 219         .attach                 = ti_startup,
 220         .release                = ti_release,
 221         .port_probe             = ti_port_probe,
 222         .port_remove            = ti_port_remove,
 223         .open                   = ti_open,
 224         .close                  = ti_close,
 225         .write                  = ti_write,
 226         .write_room             = ti_write_room,
 227         .chars_in_buffer        = ti_chars_in_buffer,
 228         .tx_empty               = ti_tx_empty,
 229         .throttle               = ti_throttle,
 230         .unthrottle             = ti_unthrottle,
 231         .ioctl                  = ti_ioctl,
 232         .set_termios            = ti_set_termios,
 233         .tiocmget               = ti_tiocmget,
 234         .tiocmset               = ti_tiocmset,
 235         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 236         .get_icount             = usb_serial_generic_get_icount,
 237         .break_ctl              = ti_break,
 238         .read_int_callback      = ti_interrupt_callback,
 239         .read_bulk_callback     = ti_bulk_in_callback,
 240         .write_bulk_callback    = ti_bulk_out_callback,
 241 };
 242
 243 static struct usb_serial_driver ti_2port_device = {
 244         .driver = {
 245                 .owner          = THIS_MODULE,
 246                 .name           = "ti_usb_3410_5052_2",
 247         },
 248         .description            = "TI USB 5052 2 port adapter",
 249         .id_table               = ti_id_table_5052,
 250         .num_ports              = 2,
 251         .attach                 = ti_startup,
 252         .release                = ti_release,
 253         .port_probe             = ti_port_probe,
 254         .port_remove            = ti_port_remove,
 255         .open                   = ti_open,
 256         .close                  = ti_close,
 257         .write                  = ti_write,
 258         .write_room             = ti_write_room,
 259         .chars_in_buffer        = ti_chars_in_buffer,
 260         .tx_empty               = ti_tx_empty,
 261         .throttle               = ti_throttle,
 262         .unthrottle             = ti_unthrottle,
 263         .ioctl                  = ti_ioctl,
 264         .set_termios            = ti_set_termios,
 265         .tiocmget               = ti_tiocmget,
 266         .tiocmset               = ti_tiocmset,
 267         .tiocmiwait             = usb_serial_generic_tiocmiwait,
 268         .get_icount             = usb_serial_generic_get_icount,
 269         .break_ctl              = ti_break,
 270         .read_int_callback      = ti_interrupt_callback,
 271         .read_bulk_callback     = ti_bulk_in_callback,
 272         .write_bulk_callback    = ti_bulk_out_callback,
 273 };
 274
 275 static struct usb_serial_driver * const serial_drivers[] = {
 276         &ti_1port_device, &ti_2port_device, NULL
 277 };
 278
 279 /* Module */
 280
 281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 283 MODULE_LICENSE("GPL");
 284
 285 MODULE_FIRMWARE("ti_3410.fw");
 286 MODULE_FIRMWARE("ti_5052.fw");
 287 MODULE_FIRMWARE("mts_cdma.fw");
 288 MODULE_FIRMWARE("mts_gsm.fw");
 289 MODULE_FIRMWARE("mts_edge.fw");
 290 MODULE_FIRMWARE("mts_mt9234mu.fw");
 291 MODULE_FIRMWARE("mts_mt9234zba.fw");
 292
 293 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 294 MODULE_PARM_DESC(closing_wait,
 295     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 296
 297 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 298 MODULE_PARM_DESC(vendor_3410,
 299                 "Vendor ids for 3410 based devices, 1-5 short integers");
 300 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 301 MODULE_PARM_DESC(product_3410,
 302                 "Product ids for 3410 based devices, 1-5 short integers");
 303 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 304 MODULE_PARM_DESC(vendor_5052,
 305                 "Vendor ids for 5052 based devices, 1-5 short integers");
 306 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 307 MODULE_PARM_DESC(product_5052,
 308                 "Product ids for 5052 based devices, 1-5 short integers");
 309
 310 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 311
 312
 313 /* Functions */
 314
 315 static int __init ti_init(void)
 316 {
 317         int i, j, c;
 318
 319         /* insert extra vendor and product ids */
 320         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 321         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 322         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 323                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 324                 ti_id_table_3410[j].idProduct = product_3410[i];
 325                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 326                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 327                 ti_id_table_combined[c].idProduct = product_3410[i];
 328                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 329         }
 330         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 331         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 332                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 333                 ti_id_table_5052[j].idProduct = product_5052[i];
 334                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 335                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 336                 ti_id_table_combined[c].idProduct = product_5052[i];
 337                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 338         }
 339
 340         return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 341 }
 342
 343 static void __exit ti_exit(void)
 344 {
 345         usb_serial_deregister_drivers(serial_drivers);
 346 }
 347
 348 module_init(ti_init);
 349 module_exit(ti_exit);
 350
 351
 352 static int ti_startup(struct usb_serial *serial)
 353 {
 354         struct ti_device *tdev;
 355         struct usb_device *dev = serial->dev;
 356         int status;
 357
 358         dev_dbg(&dev->dev,
 359                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 360                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 361                 dev->descriptor.bNumConfigurations,
 362                 dev->actconfig->desc.bConfigurationValue);
 363
 364         /* create device structure */
 365         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 366         if (tdev == NULL) {
 367                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 368                 return -ENOMEM;
 369         }
 370         mutex_init(&tdev->td_open_close_lock);
 371         tdev->td_serial = serial;
 372         usb_set_serial_data(serial, tdev);
 373
 374         /* determine device type */
 375         if (serial->type == &ti_1port_device)
 376                 tdev->td_is_3410 = 1;
 377         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 378                 tdev->td_is_3410 ? "3410" : "5052");
 379
 380         /* if we have only 1 configuration, download firmware */
 381         if (dev->descriptor.bNumConfigurations == 1) {
 382                 status = ti_download_firmware(tdev);
 383
 384                 if (status != 0)
 385                         goto free_tdev;
 386
 387                 /* 3410 must be reset, 5052 resets itself */
 388                 if (tdev->td_is_3410) {
 389                         msleep_interruptible(100);
 390                         usb_reset_device(dev);
 391                 }
 392
 393                 status = -ENODEV;
 394                 goto free_tdev;
 395         }
 396
 397         /* the second configuration must be set */
 398         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 399                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 400                 status = status ? status : -ENODEV;
 401                 goto free_tdev;
 402         }
 403
 404         return 0;
 405
 406 free_tdev:
 407         kfree(tdev);
 408         usb_set_serial_data(serial, NULL);
 409         return status;
 410 }
 411
 412
 413 static void ti_release(struct usb_serial *serial)
 414 {
 415         struct ti_device *tdev = usb_get_serial_data(serial);
 416
 417         kfree(tdev);
 418 }
 419
 420 static int ti_port_probe(struct usb_serial_port *port)
 421 {
 422         struct ti_port *tport;
 423
 424         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 425         if (!tport)
 426                 return -ENOMEM;
 427
 428         spin_lock_init(&tport->tp_lock);
 429         if (port == port->serial->port[0])
 430                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 431         else
 432                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 433         port->port.closing_wait = msecs_to_jiffies(10 * closing_wait);
 434         init_waitqueue_head(&tport->tp_write_wait);
 435         if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
 436                 kfree(tport);
 437                 return -ENOMEM;
 438         }
 439         tport->tp_port = port;
 440         tport->tp_tdev = usb_get_serial_data(port->serial);
 441         tport->tp_uart_mode = 0;        /* default is RS232 */
 442
 443         usb_set_serial_port_data(port, tport);
 444
 445         return 0;
 446 }
 447
 448 static int ti_port_remove(struct usb_serial_port *port)
 449 {
 450         struct ti_port *tport;
 451
 452         tport = usb_get_serial_port_data(port);
 453         kfifo_free(&tport->write_fifo);
 454         kfree(tport);
 455
 456         return 0;
 457 }
 458
 459 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 460 {
 461         struct ti_port *tport = usb_get_serial_port_data(port);
 462         struct ti_device *tdev;
 463         struct usb_device *dev;
 464         struct urb *urb;
 465         int port_number;
 466         int status;
 467         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 468                              TI_PIPE_TIMEOUT_ENABLE |
 469                              (TI_TRANSFER_TIMEOUT << 2));
 470
 471         if (tport == NULL)
 472                 return -ENODEV;
 473
 474         dev = port->serial->dev;
 475         tdev = tport->tp_tdev;
 476
 477         /* only one open on any port on a device at a time */
 478         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 479                 return -ERESTARTSYS;
 480
 481         port_number = port->number - port->serial->minor;
 482
 483         tport->tp_msr = 0;
 484         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 485
 486         /* start interrupt urb the first time a port is opened on this device */
 487         if (tdev->td_open_port_count == 0) {
 488                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 489                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 490                 if (!urb) {
 491                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 492                         status = -EINVAL;
 493                         goto release_lock;
 494                 }
 495                 urb->context = tdev;
 496                 status = usb_submit_urb(urb, GFP_KERNEL);
 497                 if (status) {
 498                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 499                         goto release_lock;
 500                 }
 501         }
 502
 503         if (tty)
 504                 ti_set_termios(tty, port, &tty->termios);
 505
 506         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 507         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 508                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 509         if (status) {
 510                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 511                         __func__, status);
 512                 goto unlink_int_urb;
 513         }
 514
 515         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 516         status = ti_command_out_sync(tdev, TI_START_PORT,
 517                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 518         if (status) {
 519                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 520                                                         __func__, status);
 521                 goto unlink_int_urb;
 522         }
 523
 524         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 525         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 526                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 527         if (status) {
 528                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 529                                                         __func__, status);
 530                 goto unlink_int_urb;
 531         }
 532         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 533                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 534         if (status) {
 535                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 536                                                         __func__, status);
 537                 goto unlink_int_urb;
 538         }
 539
 540         /* reset the data toggle on the bulk endpoints to work around bug in
 541          * host controllers where things get out of sync some times */
 542         usb_clear_halt(dev, port->write_urb->pipe);
 543         usb_clear_halt(dev, port->read_urb->pipe);
 544
 545         if (tty)
 546                 ti_set_termios(tty, port, &tty->termios);
 547
 548         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 549         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 550                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 551         if (status) {
 552                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 553                                                         __func__, status);
 554                 goto unlink_int_urb;
 555         }
 556
 557         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 558         status = ti_command_out_sync(tdev, TI_START_PORT,
 559                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 560         if (status) {
 561                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 562                                                         __func__, status);
 563                 goto unlink_int_urb;
 564         }
 565
 566         /* start read urb */
 567         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 568         urb = port->read_urb;
 569         if (!urb) {
 570                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 571                 status = -EINVAL;
 572                 goto unlink_int_urb;
 573         }
 574         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 575         urb->context = tport;
 576         status = usb_submit_urb(urb, GFP_KERNEL);
 577         if (status) {
 578                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 579                                                         __func__, status);
 580                 goto unlink_int_urb;
 581         }
 582
 583         tport->tp_is_open = 1;
 584         ++tdev->td_open_port_count;
 585
 586         port->port.drain_delay = 3;
 587
 588         goto release_lock;
 589
 590 unlink_int_urb:
 591         if (tdev->td_open_port_count == 0)
 592                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 593 release_lock:
 594         mutex_unlock(&tdev->td_open_close_lock);
 595         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 596         return status;
 597 }
 598
 599
 600 static void ti_close(struct usb_serial_port *port)
 601 {
 602         struct ti_device *tdev;
 603         struct ti_port *tport;
 604         int port_number;
 605         int status;
 606         int do_unlock;
 607         unsigned long flags;
 608
 609         tdev = usb_get_serial_data(port->serial);
 610         tport = usb_get_serial_port_data(port);
 611         if (tdev == NULL || tport == NULL)
 612                 return;
 613
 614         tport->tp_is_open = 0;
 615
 616         usb_kill_urb(port->read_urb);
 617         usb_kill_urb(port->write_urb);
 618         tport->tp_write_urb_in_use = 0;
 619         spin_lock_irqsave(&tport->tp_lock, flags);
 620         kfifo_reset_out(&tport->write_fifo);
 621         spin_unlock_irqrestore(&tport->tp_lock, flags);
 622
 623         port_number = port->number - port->serial->minor;
 624
 625         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 626         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 627                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 628         if (status)
 629                 dev_err(&port->dev,
 630                         "%s - cannot send close port command, %d\n"
 631                                                         , __func__, status);
 632
 633         /* if mutex_lock is interrupted, continue anyway */
 634         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 635         --tport->tp_tdev->td_open_port_count;
 636         if (tport->tp_tdev->td_open_port_count <= 0) {
 637                 /* last port is closed, shut down interrupt urb */
 638                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 639                 tport->tp_tdev->td_open_port_count = 0;
 640         }
 641         if (do_unlock)
 642                 mutex_unlock(&tdev->td_open_close_lock);
 643 }
 644
 645
 646 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 647                         const unsigned char *data, int count)
 648 {
 649         struct ti_port *tport = usb_get_serial_port_data(port);
 650
 651         if (count == 0) {
 652                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 653                 return 0;
 654         }
 655
 656         if (tport == NULL || !tport->tp_is_open)
 657                 return -ENODEV;
 658
 659         count = kfifo_in_locked(&tport->write_fifo, data, count,
 660                                                         &tport->tp_lock);
 661         ti_send(tport);
 662
 663         return count;
 664 }
 665
 666
 667 static int ti_write_room(struct tty_struct *tty)
 668 {
 669         struct usb_serial_port *port = tty->driver_data;
 670         struct ti_port *tport = usb_get_serial_port_data(port);
 671         int room = 0;
 672         unsigned long flags;
 673
 674         if (tport == NULL)
 675                 return 0;
 676
 677         spin_lock_irqsave(&tport->tp_lock, flags);
 678         room = kfifo_avail(&tport->write_fifo);
 679         spin_unlock_irqrestore(&tport->tp_lock, flags);
 680
 681         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 682         return room;
 683 }
 684
 685
 686 static int ti_chars_in_buffer(struct tty_struct *tty)
 687 {
 688         struct usb_serial_port *port = tty->driver_data;
 689         struct ti_port *tport = usb_get_serial_port_data(port);
 690         int chars = 0;
 691         unsigned long flags;
 692
 693         if (tport == NULL)
 694                 return 0;
 695
 696         spin_lock_irqsave(&tport->tp_lock, flags);
 697         chars = kfifo_len(&tport->write_fifo);
 698         spin_unlock_irqrestore(&tport->tp_lock, flags);
 699
 700         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 701         return chars;
 702 }
 703
 704 static bool ti_tx_empty(struct usb_serial_port *port)
 705 {
 706         struct ti_port *tport = usb_get_serial_port_data(port);
 707         int ret;
 708         u8 lsr;
 709
 710         ret = ti_get_lsr(tport, &lsr);
 711         if (!ret && !(lsr & TI_LSR_TX_EMPTY))
 712                 return false;
 713
 714         return true;
 715 }
 716
 717 static void ti_throttle(struct tty_struct *tty)
 718 {
 719         struct usb_serial_port *port = tty->driver_data;
 720         struct ti_port *tport = usb_get_serial_port_data(port);
 721
 722         if (tport == NULL)
 723                 return;
 724
 725         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 726                 ti_stop_read(tport, tty);
 727
 728 }
 729
 730
 731 static void ti_unthrottle(struct tty_struct *tty)
 732 {
 733         struct usb_serial_port *port = tty->driver_data;
 734         struct ti_port *tport = usb_get_serial_port_data(port);
 735         int status;
 736
 737         if (tport == NULL)
 738                 return;
 739
 740         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 741                 status = ti_restart_read(tport, tty);
 742                 if (status)
 743                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 744                                                         __func__, status);
 745         }
 746 }
 747
 748 static int ti_ioctl(struct tty_struct *tty,
 749         unsigned int cmd, unsigned long arg)
 750 {
 751         struct usb_serial_port *port = tty->driver_data;
 752         struct ti_port *tport = usb_get_serial_port_data(port);
 753
 754         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 755
 756         if (tport == NULL)
 757                 return -ENODEV;
 758
 759         switch (cmd) {
 760         case TIOCGSERIAL:
 761                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 762                 return ti_get_serial_info(tport,
 763                                 (struct serial_struct __user *)arg);
 764         case TIOCSSERIAL:
 765                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 766                 return ti_set_serial_info(tty, tport,
 767                                 (struct serial_struct __user *)arg);
 768         }
 769         return -ENOIOCTLCMD;
 770 }
 771
 772
 773 static void ti_set_termios(struct tty_struct *tty,
 774                 struct usb_serial_port *port, struct ktermios *old_termios)
 775 {
 776         struct ti_port *tport = usb_get_serial_port_data(port);
 777         struct ti_uart_config *config;
 778         tcflag_t cflag, iflag;
 779         int baud;
 780         int status;
 781         int port_number = port->number - port->serial->minor;
 782         unsigned int mcr;
 783
 784         cflag = tty->termios.c_cflag;
 785         iflag = tty->termios.c_iflag;
 786
 787         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 788         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 789                 old_termios->c_cflag, old_termios->c_iflag);
 790
 791         if (tport == NULL)
 792                 return;
 793
 794         config = kmalloc(sizeof(*config), GFP_KERNEL);
 795         if (!config) {
 796                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 797                 return;
 798         }
 799
 800         config->wFlags = 0;
 801
 802         /* these flags must be set */
 803         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 804         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 805         config->bUartMode = (__u8)(tport->tp_uart_mode);
 806
 807         switch (cflag & CSIZE) {
 808         case CS5:
 809                     config->bDataBits = TI_UART_5_DATA_BITS;
 810                     break;
 811         case CS6:
 812                     config->bDataBits = TI_UART_6_DATA_BITS;
 813                     break;
 814         case CS7:
 815                     config->bDataBits = TI_UART_7_DATA_BITS;
 816                     break;
 817         default:
 818         case CS8:
 819                     config->bDataBits = TI_UART_8_DATA_BITS;
 820                     break;
 821         }
 822
 823         /* CMSPAR isn't supported by this driver */
 824         tty->termios.c_cflag &= ~CMSPAR;
 825
 826         if (cflag & PARENB) {
 827                 if (cflag & PARODD) {
 828                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 829                         config->bParity = TI_UART_ODD_PARITY;
 830                 } else {
 831                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 832                         config->bParity = TI_UART_EVEN_PARITY;
 833                 }
 834         } else {
 835                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 836                 config->bParity = TI_UART_NO_PARITY;
 837         }
 838
 839         if (cflag & CSTOPB)
 840                 config->bStopBits = TI_UART_2_STOP_BITS;
 841         else
 842                 config->bStopBits = TI_UART_1_STOP_BITS;
 843
 844         if (cflag & CRTSCTS) {
 845                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 846                 if ((cflag & CBAUD) != B0)
 847                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 848                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 849         } else {
 850                 tty->hw_stopped = 0;
 851                 ti_restart_read(tport, tty);
 852         }
 853
 854         if (I_IXOFF(tty) || I_IXON(tty)) {
 855                 config->cXon  = START_CHAR(tty);
 856                 config->cXoff = STOP_CHAR(tty);
 857
 858                 if (I_IXOFF(tty))
 859                         config->wFlags |= TI_UART_ENABLE_X_IN;
 860                 else
 861                         ti_restart_read(tport, tty);
 862
 863                 if (I_IXON(tty))
 864                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 865         }
 866
 867         baud = tty_get_baud_rate(tty);
 868         if (!baud)
 869                 baud = 9600;
 870         if (tport->tp_tdev->td_is_3410)
 871                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 872         else
 873                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 874
 875         /* FIXME: Should calculate resulting baud here and report it back */
 876         if ((cflag & CBAUD) != B0)
 877                 tty_encode_baud_rate(tty, baud, baud);
 878
 879         dev_dbg(&port->dev,
 880                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 881                 __func__, baud, config->wBaudRate, config->wFlags,
 882                 config->bDataBits, config->bParity, config->bStopBits,
 883                 config->cXon, config->cXoff, config->bUartMode);
 884
 885         cpu_to_be16s(&config->wBaudRate);
 886         cpu_to_be16s(&config->wFlags);
 887
 888         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 889                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 890                 sizeof(*config));
 891         if (status)
 892                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 893                                         __func__, port_number, status);
 894
 895         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 896         mcr = tport->tp_shadow_mcr;
 897         /* if baud rate is B0, clear RTS and DTR */
 898         if ((cflag & CBAUD) == B0)
 899                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 900         status = ti_set_mcr(tport, mcr);
 901         if (status)
 902                 dev_err(&port->dev,
 903                         "%s - cannot set modem control on port %d, %d\n",
 904                                                 __func__, port_number, status);
 905
 906         kfree(config);
 907 }
 908
 909
 910 static int ti_tiocmget(struct tty_struct *tty)
 911 {
 912         struct usb_serial_port *port = tty->driver_data;
 913         struct ti_port *tport = usb_get_serial_port_data(port);
 914         unsigned int result;
 915         unsigned int msr;
 916         unsigned int mcr;
 917         unsigned long flags;
 918
 919         if (tport == NULL)
 920                 return -ENODEV;
 921
 922         spin_lock_irqsave(&tport->tp_lock, flags);
 923         msr = tport->tp_msr;
 924         mcr = tport->tp_shadow_mcr;
 925         spin_unlock_irqrestore(&tport->tp_lock, flags);
 926
 927         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 928                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 929                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 930                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 931                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 932                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 933                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 934
 935         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 936
 937         return result;
 938 }
 939
 940
 941 static int ti_tiocmset(struct tty_struct *tty,
 942                                 unsigned int set, unsigned int clear)
 943 {
 944         struct usb_serial_port *port = tty->driver_data;
 945         struct ti_port *tport = usb_get_serial_port_data(port);
 946         unsigned int mcr;
 947         unsigned long flags;
 948
 949         if (tport == NULL)
 950                 return -ENODEV;
 951
 952         spin_lock_irqsave(&tport->tp_lock, flags);
 953         mcr = tport->tp_shadow_mcr;
 954
 955         if (set & TIOCM_RTS)
 956                 mcr |= TI_MCR_RTS;
 957         if (set & TIOCM_DTR)
 958                 mcr |= TI_MCR_DTR;
 959         if (set & TIOCM_LOOP)
 960                 mcr |= TI_MCR_LOOP;
 961
 962         if (clear & TIOCM_RTS)
 963                 mcr &= ~TI_MCR_RTS;
 964         if (clear & TIOCM_DTR)
 965                 mcr &= ~TI_MCR_DTR;
 966         if (clear & TIOCM_LOOP)
 967                 mcr &= ~TI_MCR_LOOP;
 968         spin_unlock_irqrestore(&tport->tp_lock, flags);
 969
 970         return ti_set_mcr(tport, mcr);
 971 }
 972
 973
 974 static void ti_break(struct tty_struct *tty, int break_state)
 975 {
 976         struct usb_serial_port *port = tty->driver_data;
 977         struct ti_port *tport = usb_get_serial_port_data(port);
 978         int status;
 979
 980         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
 981
 982         if (tport == NULL)
 983                 return;
 984
 985         status = ti_write_byte(port, tport->tp_tdev,
 986                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
 987                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
 988
 989         if (status)
 990                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
 991 }
 992
 993
 994 static void ti_interrupt_callback(struct urb *urb)
 995 {
 996         struct ti_device *tdev = urb->context;
 997         struct usb_serial_port *port;
 998         struct usb_serial *serial = tdev->td_serial;
 999         struct ti_port *tport;
1000         struct device *dev = &urb->dev->dev;
1001         unsigned char *data = urb->transfer_buffer;
1002         int length = urb->actual_length;
1003         int port_number;
1004         int function;
1005         int status = urb->status;
1006         int retval;
1007         __u8 msr;
1008
1009         switch (status) {
1010         case 0:
1011                 break;
1012         case -ECONNRESET:
1013         case -ENOENT:
1014         case -ESHUTDOWN:
1015                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1016                 tdev->td_urb_error = 1;
1017                 return;
1018         default:
1019                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1020                 tdev->td_urb_error = 1;
1021                 goto exit;
1022         }
1023
1024         if (length != 2) {
1025                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1026                 goto exit;
1027         }
1028
1029         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1030                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1031                 goto exit;
1032         }
1033
1034         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1035         function = TI_GET_FUNC_FROM_CODE(data[0]);
1036
1037         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1038                 __func__, port_number, function, data[1]);
1039
1040         if (port_number >= serial->num_ports) {
1041                 dev_err(dev, "%s - bad port number, %d\n",
1042                                                 __func__, port_number);
1043                 goto exit;
1044         }
1045
1046         port = serial->port[port_number];
1047
1048         tport = usb_get_serial_port_data(port);
1049         if (!tport)
1050                 goto exit;
1051
1052         switch (function) {
1053         case TI_CODE_DATA_ERROR:
1054                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1055                         __func__, port_number, data[1]);
1056                 break;
1057
1058         case TI_CODE_MODEM_STATUS:
1059                 msr = data[1];
1060                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1061                 ti_handle_new_msr(tport, msr);
1062                 break;
1063
1064         default:
1065                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1066                                                         __func__, data[1]);
1067                 break;
1068         }
1069
1070 exit:
1071         retval = usb_submit_urb(urb, GFP_ATOMIC);
1072         if (retval)
1073                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1074                         __func__, retval);
1075 }
1076
1077
1078 static void ti_bulk_in_callback(struct urb *urb)
1079 {
1080         struct ti_port *tport = urb->context;
1081         struct usb_serial_port *port = tport->tp_port;
1082         struct device *dev = &urb->dev->dev;
1083         int status = urb->status;
1084         int retval = 0;
1085
1086         switch (status) {
1087         case 0:
1088                 break;
1089         case -ECONNRESET:
1090         case -ENOENT:
1091         case -ESHUTDOWN:
1092                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1093                 tport->tp_tdev->td_urb_error = 1;
1094                 wake_up_interruptible(&tport->tp_write_wait);
1095                 return;
1096         default:
1097                 dev_err(dev, "%s - nonzero urb status, %d\n",
1098                         __func__, status);
1099                 tport->tp_tdev->td_urb_error = 1;
1100                 wake_up_interruptible(&tport->tp_write_wait);
1101         }
1102
1103         if (status == -EPIPE)
1104                 goto exit;
1105
1106         if (status) {
1107                 dev_err(dev, "%s - stopping read!\n", __func__);
1108                 return;
1109         }
1110
1111         if (urb->actual_length) {
1112                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1113                                       urb->transfer_buffer);
1114
1115                 if (!tport->tp_is_open)
1116                         dev_dbg(dev, "%s - port closed, dropping data\n",
1117                                 __func__);
1118                 else
1119                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1120                 spin_lock(&tport->tp_lock);
1121                 port->icount.rx += urb->actual_length;
1122                 spin_unlock(&tport->tp_lock);
1123         }
1124
1125 exit:
1126         /* continue to read unless stopping */
1127         spin_lock(&tport->tp_lock);
1128         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1129                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1130         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1131                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1132
1133         spin_unlock(&tport->tp_lock);
1134         if (retval)
1135                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1136                         __func__, retval);
1137 }
1138
1139
1140 static void ti_bulk_out_callback(struct urb *urb)
1141 {
1142         struct ti_port *tport = urb->context;
1143         struct usb_serial_port *port = tport->tp_port;
1144         int status = urb->status;
1145
1146         tport->tp_write_urb_in_use = 0;
1147
1148         switch (status) {
1149         case 0:
1150                 break;
1151         case -ECONNRESET:
1152         case -ENOENT:
1153         case -ESHUTDOWN:
1154                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1155                 tport->tp_tdev->td_urb_error = 1;
1156                 wake_up_interruptible(&tport->tp_write_wait);
1157                 return;
1158         default:
1159                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1160                         __func__, status);
1161                 tport->tp_tdev->td_urb_error = 1;
1162                 wake_up_interruptible(&tport->tp_write_wait);
1163         }
1164
1165         /* send any buffered data */
1166         ti_send(tport);
1167 }
1168
1169
1170 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1171                 int length)
1172 {
1173         int cnt;
1174
1175         do {
1176                 cnt = tty_insert_flip_string(&port->port, data, length);
1177                 if (cnt < length) {
1178                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1179                                                 __func__, length - cnt);
1180                         if (cnt == 0)
1181                                 break;
1182                 }
1183                 tty_flip_buffer_push(&port->port);
1184                 data += cnt;
1185                 length -= cnt;
1186         } while (length > 0);
1187 }
1188
1189
1190 static void ti_send(struct ti_port *tport)
1191 {
1192         int count, result;
1193         struct usb_serial_port *port = tport->tp_port;
1194         unsigned long flags;
1195
1196         spin_lock_irqsave(&tport->tp_lock, flags);
1197
1198         if (tport->tp_write_urb_in_use)
1199                 goto unlock;
1200
1201         count = kfifo_out(&tport->write_fifo,
1202                                 port->write_urb->transfer_buffer,
1203                                 port->bulk_out_size);
1204
1205         if (count == 0)
1206                 goto unlock;
1207
1208         tport->tp_write_urb_in_use = 1;
1209
1210         spin_unlock_irqrestore(&tport->tp_lock, flags);
1211
1212         usb_serial_debug_data(&port->dev, __func__, count,
1213                               port->write_urb->transfer_buffer);
1214
1215         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1216                            usb_sndbulkpipe(port->serial->dev,
1217                                             port->bulk_out_endpointAddress),
1218                            port->write_urb->transfer_buffer, count,
1219                            ti_bulk_out_callback, tport);
1220
1221         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1222         if (result) {
1223                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1224                                                         __func__, result);
1225                 tport->tp_write_urb_in_use = 0;
1226                 /* TODO: reschedule ti_send */
1227         } else {
1228                 spin_lock_irqsave(&tport->tp_lock, flags);
1229                 port->icount.tx += count;
1230                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1231         }
1232
1233         /* more room in the buffer for new writes, wakeup */
1234         tty_port_tty_wakeup(&port->port);
1235
1236         wake_up_interruptible(&tport->tp_write_wait);
1237         return;
1238 unlock:
1239         spin_unlock_irqrestore(&tport->tp_lock, flags);
1240         return;
1241 }
1242
1243
1244 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1245 {
1246         unsigned long flags;
1247         int status;
1248
1249         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1250                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1251                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1252
1253         spin_lock_irqsave(&tport->tp_lock, flags);
1254         if (!status)
1255                 tport->tp_shadow_mcr = mcr;
1256         spin_unlock_irqrestore(&tport->tp_lock, flags);
1257
1258         return status;
1259 }
1260
1261
1262 static int ti_get_lsr(struct ti_port *tport, u8 *lsr)
1263 {
1264         int size, status;
1265         struct ti_device *tdev = tport->tp_tdev;
1266         struct usb_serial_port *port = tport->tp_port;
1267         int port_number = port->number - port->serial->minor;
1268         struct ti_port_status *data;
1269
1270         size = sizeof(struct ti_port_status);
1271         data = kmalloc(size, GFP_KERNEL);
1272         if (!data) {
1273                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1274                 return -ENOMEM;
1275         }
1276
1277         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1278                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1279         if (status) {
1280                 dev_err(&port->dev,
1281                         "%s - get port status command failed, %d\n",
1282                                                         __func__, status);
1283                 goto free_data;
1284         }
1285
1286         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1287
1288         *lsr = data->bLSR;
1289
1290 free_data:
1291         kfree(data);
1292         return status;
1293 }
1294
1295
1296 static int ti_get_serial_info(struct ti_port *tport,
1297         struct serial_struct __user *ret_arg)
1298 {
1299         struct usb_serial_port *port = tport->tp_port;
1300         struct serial_struct ret_serial;
1301         unsigned cwait;
1302
1303         if (!ret_arg)
1304                 return -EFAULT;
1305
1306         cwait = port->port.closing_wait;
1307         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1308                 cwait = jiffies_to_msecs(cwait) / 10;
1309
1310         memset(&ret_serial, 0, sizeof(ret_serial));
1311
1312         ret_serial.type = PORT_16550A;
1313         ret_serial.line = port->serial->minor;
1314         ret_serial.port = port->number - port->serial->minor;
1315         ret_serial.flags = tport->tp_flags;
1316         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1317         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1318         ret_serial.closing_wait = cwait;
1319
1320         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1321                 return -EFAULT;
1322
1323         return 0;
1324 }
1325
1326
1327 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1328         struct serial_struct __user *new_arg)
1329 {
1330         struct serial_struct new_serial;
1331         unsigned cwait;
1332
1333         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1334                 return -EFAULT;
1335
1336         cwait = new_serial.closing_wait;
1337         if (cwait != ASYNC_CLOSING_WAIT_NONE)
1338                 cwait = msecs_to_jiffies(10 * new_serial.closing_wait);
1339
1340         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1341         tport->tp_port->port.closing_wait = cwait;
1342
1343         return 0;
1344 }
1345
1346
1347 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1348 {
1349         struct async_icount *icount;
1350         struct tty_struct *tty;
1351         unsigned long flags;
1352
1353         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1354
1355         if (msr & TI_MSR_DELTA_MASK) {
1356                 spin_lock_irqsave(&tport->tp_lock, flags);
1357                 icount = &tport->tp_port->icount;
1358                 if (msr & TI_MSR_DELTA_CTS)
1359                         icount->cts++;
1360                 if (msr & TI_MSR_DELTA_DSR)
1361                         icount->dsr++;
1362                 if (msr & TI_MSR_DELTA_CD)
1363                         icount->dcd++;
1364                 if (msr & TI_MSR_DELTA_RI)
1365                         icount->rng++;
1366                 wake_up_interruptible(&tport->tp_port->port.delta_msr_wait);
1367                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1368         }
1369
1370         tport->tp_msr = msr & TI_MSR_MASK;
1371
1372         /* handle CTS flow control */
1373         tty = tty_port_tty_get(&tport->tp_port->port);
1374         if (tty && C_CRTSCTS(tty)) {
1375                 if (msr & TI_MSR_CTS) {
1376                         tty->hw_stopped = 0;
1377                         tty_wakeup(tty);
1378                 } else {
1379                         tty->hw_stopped = 1;
1380                 }
1381         }
1382         tty_kref_put(tty);
1383 }
1384
1385
1386 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1387 {
1388         unsigned long flags;
1389
1390         spin_lock_irqsave(&tport->tp_lock, flags);
1391
1392         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1393                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1394
1395         spin_unlock_irqrestore(&tport->tp_lock, flags);
1396 }
1397
1398
1399 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1400 {
1401         struct urb *urb;
1402         int status = 0;
1403         unsigned long flags;
1404
1405         spin_lock_irqsave(&tport->tp_lock, flags);
1406
1407         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1408                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1409                 urb = tport->tp_port->read_urb;
1410                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1411                 urb->context = tport;
1412                 status = usb_submit_urb(urb, GFP_KERNEL);
1413         } else  {
1414                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1415                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1416         }
1417
1418         return status;
1419 }
1420
1421
1422 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1423         __u16 moduleid, __u16 value, __u8 *data, int size)
1424 {
1425         int status;
1426
1427         status = usb_control_msg(tdev->td_serial->dev,
1428                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1429                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1430                 value, moduleid, data, size, 1000);
1431
1432         if (status == size)
1433                 status = 0;
1434
1435         if (status > 0)
1436                 status = -ECOMM;
1437
1438         return status;
1439 }
1440
1441
1442 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1443         __u16 moduleid, __u16 value, __u8 *data, int size)
1444 {
1445         int status;
1446
1447         status = usb_control_msg(tdev->td_serial->dev,
1448                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1449                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1450                 value, moduleid, data, size, 1000);
1451
1452         if (status == size)
1453                 status = 0;
1454
1455         if (status > 0)
1456                 status = -ECOMM;
1457
1458         return status;
1459 }
1460
1461
1462 static int ti_write_byte(struct usb_serial_port *port,
1463                         struct ti_device *tdev, unsigned long addr,
1464                         __u8 mask, __u8 byte)
1465 {
1466         int status;
1467         unsigned int size;
1468         struct ti_write_data_bytes *data;
1469
1470         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1471                 addr, mask, byte);
1472
1473         size = sizeof(struct ti_write_data_bytes) + 2;
1474         data = kmalloc(size, GFP_KERNEL);
1475         if (!data) {
1476                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1477                 return -ENOMEM;
1478         }
1479
1480         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1481         data->bDataType = TI_RW_DATA_BYTE;
1482         data->bDataCounter = 1;
1483         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1484         data->wBaseAddrLo = cpu_to_be16(addr);
1485         data->bData[0] = mask;
1486         data->bData[1] = byte;
1487
1488         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1489                 (__u8 *)data, size);
1490
1491         if (status < 0)
1492                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1493
1494         kfree(data);
1495
1496         return status;
1497 }
1498
1499 static int ti_do_download(struct usb_device *dev, int pipe,
1500                                                 u8 *buffer, int size)
1501 {
1502         int pos;
1503         u8 cs = 0;
1504         int done;
1505         struct ti_firmware_header *header;
1506         int status = 0;
1507         int len;
1508
1509         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1510                 cs = (__u8)(cs + buffer[pos]);
1511
1512         header = (struct ti_firmware_header *)buffer;
1513         header->wLength = cpu_to_le16((__u16)(size
1514                                         - sizeof(struct ti_firmware_header)));
1515         header->bCheckSum = cs;
1516
1517         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1518         for (pos = 0; pos < size; pos += done) {
1519                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1520                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1521                                                                 &done, 1000);
1522                 if (status)
1523                         break;
1524         }
1525         return status;
1526 }
1527
1528 static int ti_download_firmware(struct ti_device *tdev)
1529 {
1530         int status;
1531         int buffer_size;
1532         __u8 *buffer;
1533         struct usb_device *dev = tdev->td_serial->dev;
1534         unsigned int pipe = usb_sndbulkpipe(dev,
1535                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1536         const struct firmware *fw_p;
1537         char buf[32];
1538
1539         /* try ID specific firmware first, then try generic firmware */
1540         sprintf(buf, "ti_usb-v%04x-p%04x.fw",
1541                         le16_to_cpu(dev->descriptor.idVendor),
1542                         le16_to_cpu(dev->descriptor.idProduct));
1543         status = request_firmware(&fw_p, buf, &dev->dev);
1544
1545         if (status != 0) {
1546                 buf[0] = '\0';
1547                 if (le16_to_cpu(dev->descriptor.idVendor) == MTS_VENDOR_ID) {
1548                         switch (le16_to_cpu(dev->descriptor.idProduct)) {
1549                         case MTS_CDMA_PRODUCT_ID:
1550                                 strcpy(buf, "mts_cdma.fw");
1551                                 break;
1552                         case MTS_GSM_PRODUCT_ID:
1553                                 strcpy(buf, "mts_gsm.fw");
1554                                 break;
1555                         case MTS_EDGE_PRODUCT_ID:
1556                                 strcpy(buf, "mts_edge.fw");
1557                                 break;
1558                         case MTS_MT9234MU_PRODUCT_ID:
1559                                 strcpy(buf, "mts_mt9234mu.fw");
1560                                 break;
1561                         case MTS_MT9234ZBA_PRODUCT_ID:
1562                                 strcpy(buf, "mts_mt9234zba.fw");
1563                                 break;
1564                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1565                                 strcpy(buf, "mts_mt9234zba.fw");
1566                                 break;                  }
1567                 }
1568                 if (buf[0] == '\0') {
1569                         if (tdev->td_is_3410)
1570                                 strcpy(buf, "ti_3410.fw");
1571                         else
1572                                 strcpy(buf, "ti_5052.fw");
1573                 }
1574                 status = request_firmware(&fw_p, buf, &dev->dev);
1575         }
1576         if (status) {
1577                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1578                 return -ENOENT;
1579         }
1580         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1581                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1582                 release_firmware(fw_p);
1583                 return -ENOENT;
1584         }
1585
1586         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1587         buffer = kmalloc(buffer_size, GFP_KERNEL);
1588         if (buffer) {
1589                 memcpy(buffer, fw_p->data, fw_p->size);
1590                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1591                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1592                 kfree(buffer);
1593         } else {
1594                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1595                 status = -ENOMEM;
1596         }
1597         release_firmware(fw_p);
1598         if (status) {
1599                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1600                                                         __func__, status);
1601                 return status;
1602         }
1603
1604         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1605
1606         return 0;
1607 }