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_lsr;
  71         __u8                    tp_shadow_mcr;
  72         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  73         unsigned int            tp_uart_base_addr;
  74         int                     tp_flags;
  75         int                     tp_closing_wait;/* in .01 secs */
  76         struct async_icount     tp_icount;
  77         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
  78         wait_queue_head_t       tp_write_wait;
  79         struct ti_device        *tp_tdev;
  80         struct usb_serial_port  *tp_port;
  81         spinlock_t              tp_lock;
  82         int                     tp_read_urb_state;
  83         int                     tp_write_urb_in_use;
  84         struct kfifo            write_fifo;
  85 };
  86
  87 struct ti_device {
  88         struct mutex            td_open_close_lock;
  89         int                     td_open_port_count;
  90         struct usb_serial       *td_serial;
  91         int                     td_is_3410;
  92         int                     td_urb_error;
  93 };
  94
  95
  96 /* Function Declarations */
  97
  98 static int ti_startup(struct usb_serial *serial);
  99 static void ti_release(struct usb_serial *serial);
 100 static int ti_port_probe(struct usb_serial_port *port);
 101 static int ti_port_remove(struct usb_serial_port *port);
 102 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 103 static void ti_close(struct usb_serial_port *port);
 104 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 105                 const unsigned char *data, int count);
 106 static int ti_write_room(struct tty_struct *tty);
 107 static int ti_chars_in_buffer(struct tty_struct *tty);
 108 static void ti_throttle(struct tty_struct *tty);
 109 static void ti_unthrottle(struct tty_struct *tty);
 110 static int ti_ioctl(struct tty_struct *tty,
 111                 unsigned int cmd, unsigned long arg);
 112 static int ti_get_icount(struct tty_struct *tty,
 113                 struct serial_icounter_struct *icount);
 114 static void ti_set_termios(struct tty_struct *tty,
 115                 struct usb_serial_port *port, struct ktermios *old_termios);
 116 static int ti_tiocmget(struct tty_struct *tty);
 117 static int ti_tiocmset(struct tty_struct *tty,
 118                 unsigned int set, unsigned int clear);
 119 static void ti_break(struct tty_struct *tty, int break_state);
 120 static void ti_interrupt_callback(struct urb *urb);
 121 static void ti_bulk_in_callback(struct urb *urb);
 122 static void ti_bulk_out_callback(struct urb *urb);
 123
 124 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
 125                 int length);
 126 static void ti_send(struct ti_port *tport);
 127 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 128 static int ti_get_lsr(struct ti_port *tport);
 129 static int ti_get_serial_info(struct ti_port *tport,
 130         struct serial_struct __user *ret_arg);
 131 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 132         struct serial_struct __user *new_arg);
 133 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 134
 135 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 136
 137 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 138 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 139
 140 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 141         __u16 moduleid, __u16 value, __u8 *data, int size);
 142 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 143         __u16 moduleid, __u16 value, __u8 *data, int size);
 144
 145 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 146                          unsigned long addr, __u8 mask, __u8 byte);
 147
 148 static int ti_download_firmware(struct ti_device *tdev);
 149
 150
 151 /* Data */
 152
 153 /* module parameters */
 154 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 155 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 156 static unsigned int vendor_3410_count;
 157 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 158 static unsigned int product_3410_count;
 159 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 160 static unsigned int vendor_5052_count;
 161 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 162 static unsigned int product_5052_count;
 163
 164 /* supported devices */
 165 /* the array dimension is the number of default entries plus */
 166 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 167 /* null entry */
 168 static struct usb_device_id ti_id_table_3410[15+TI_EXTRA_VID_PID_COUNT+1] = {
 169         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 170         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 171         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 172         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 173         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 174         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 175         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 176         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 177         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 178         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 179         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 180         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 181         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 182         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 183         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 184 };
 185
 186 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 190         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 191 };
 192
 193 static struct usb_device_id ti_id_table_combined[19+2*TI_EXTRA_VID_PID_COUNT+1] = {
 194         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 195         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 203         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 207         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 210         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 211         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 212         { USB_DEVICE(TI_VENDOR_ID, FRI2_PRODUCT_ID) },
 213         { }
 214 };
 215
 216 static struct usb_serial_driver ti_1port_device = {
 217         .driver = {
 218                 .owner          = THIS_MODULE,
 219                 .name           = "ti_usb_3410_5052_1",
 220         },
 221         .description            = "TI USB 3410 1 port adapter",
 222         .id_table               = ti_id_table_3410,
 223         .num_ports              = 1,
 224         .attach                 = ti_startup,
 225         .release                = ti_release,
 226         .port_probe             = ti_port_probe,
 227         .port_remove            = ti_port_remove,
 228         .open                   = ti_open,
 229         .close                  = ti_close,
 230         .write                  = ti_write,
 231         .write_room             = ti_write_room,
 232         .chars_in_buffer        = ti_chars_in_buffer,
 233         .throttle               = ti_throttle,
 234         .unthrottle             = ti_unthrottle,
 235         .ioctl                  = ti_ioctl,
 236         .set_termios            = ti_set_termios,
 237         .tiocmget               = ti_tiocmget,
 238         .tiocmset               = ti_tiocmset,
 239         .get_icount             = ti_get_icount,
 240         .break_ctl              = ti_break,
 241         .read_int_callback      = ti_interrupt_callback,
 242         .read_bulk_callback     = ti_bulk_in_callback,
 243         .write_bulk_callback    = ti_bulk_out_callback,
 244 };
 245
 246 static struct usb_serial_driver ti_2port_device = {
 247         .driver = {
 248                 .owner          = THIS_MODULE,
 249                 .name           = "ti_usb_3410_5052_2",
 250         },
 251         .description            = "TI USB 5052 2 port adapter",
 252         .id_table               = ti_id_table_5052,
 253         .num_ports              = 2,
 254         .attach                 = ti_startup,
 255         .release                = ti_release,
 256         .port_probe             = ti_port_probe,
 257         .port_remove            = ti_port_remove,
 258         .open                   = ti_open,
 259         .close                  = ti_close,
 260         .write                  = ti_write,
 261         .write_room             = ti_write_room,
 262         .chars_in_buffer        = ti_chars_in_buffer,
 263         .throttle               = ti_throttle,
 264         .unthrottle             = ti_unthrottle,
 265         .ioctl                  = ti_ioctl,
 266         .set_termios            = ti_set_termios,
 267         .tiocmget               = ti_tiocmget,
 268         .tiocmset               = ti_tiocmset,
 269         .get_icount             = ti_get_icount,
 270         .break_ctl              = ti_break,
 271         .read_int_callback      = ti_interrupt_callback,
 272         .read_bulk_callback     = ti_bulk_in_callback,
 273         .write_bulk_callback    = ti_bulk_out_callback,
 274 };
 275
 276 static struct usb_serial_driver * const serial_drivers[] = {
 277         &ti_1port_device, &ti_2port_device, NULL
 278 };
 279
 280 /* Module */
 281
 282 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 283 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 284 MODULE_LICENSE("GPL");
 285
 286 MODULE_FIRMWARE("ti_3410.fw");
 287 MODULE_FIRMWARE("ti_5052.fw");
 288 MODULE_FIRMWARE("mts_cdma.fw");
 289 MODULE_FIRMWARE("mts_gsm.fw");
 290 MODULE_FIRMWARE("mts_edge.fw");
 291 MODULE_FIRMWARE("mts_mt9234mu.fw");
 292 MODULE_FIRMWARE("mts_mt9234zba.fw");
 293
 294 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 295 MODULE_PARM_DESC(closing_wait,
 296     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 297
 298 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 299 MODULE_PARM_DESC(vendor_3410,
 300                 "Vendor ids for 3410 based devices, 1-5 short integers");
 301 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 302 MODULE_PARM_DESC(product_3410,
 303                 "Product ids for 3410 based devices, 1-5 short integers");
 304 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 305 MODULE_PARM_DESC(vendor_5052,
 306                 "Vendor ids for 5052 based devices, 1-5 short integers");
 307 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 308 MODULE_PARM_DESC(product_5052,
 309                 "Product ids for 5052 based devices, 1-5 short integers");
 310
 311 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 312
 313
 314 /* Functions */
 315
 316 static int __init ti_init(void)
 317 {
 318         int i, j, c;
 319
 320         /* insert extra vendor and product ids */
 321         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 322         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 323         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 324                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 325                 ti_id_table_3410[j].idProduct = product_3410[i];
 326                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 327                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 328                 ti_id_table_combined[c].idProduct = product_3410[i];
 329                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 330         }
 331         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 332         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 333                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 334                 ti_id_table_5052[j].idProduct = product_5052[i];
 335                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 336                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 337                 ti_id_table_combined[c].idProduct = product_5052[i];
 338                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 339         }
 340
 341         return usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 342 }
 343
 344 static void __exit ti_exit(void)
 345 {
 346         usb_serial_deregister_drivers(serial_drivers);
 347 }
 348
 349 module_init(ti_init);
 350 module_exit(ti_exit);
 351
 352
 353 static int ti_startup(struct usb_serial *serial)
 354 {
 355         struct ti_device *tdev;
 356         struct usb_device *dev = serial->dev;
 357         int status;
 358
 359         dev_dbg(&dev->dev,
 360                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 361                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 362                 dev->descriptor.bNumConfigurations,
 363                 dev->actconfig->desc.bConfigurationValue);
 364
 365         /* create device structure */
 366         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 367         if (tdev == NULL) {
 368                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 369                 return -ENOMEM;
 370         }
 371         mutex_init(&tdev->td_open_close_lock);
 372         tdev->td_serial = serial;
 373         usb_set_serial_data(serial, tdev);
 374
 375         /* determine device type */
 376         if (usb_match_id(serial->interface, ti_id_table_3410))
 377                 tdev->td_is_3410 = 1;
 378         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 379                 tdev->td_is_3410 ? "3410" : "5052");
 380
 381         /* if we have only 1 configuration, download firmware */
 382         if (dev->descriptor.bNumConfigurations == 1) {
 383                 status = ti_download_firmware(tdev);
 384
 385                 if (status != 0)
 386                         goto free_tdev;
 387
 388                 /* 3410 must be reset, 5052 resets itself */
 389                 if (tdev->td_is_3410) {
 390                         msleep_interruptible(100);
 391                         usb_reset_device(dev);
 392                 }
 393
 394                 status = -ENODEV;
 395                 goto free_tdev;
 396         }
 397
 398         /* the second configuration must be set */
 399         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 400                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 401                 status = status ? status : -ENODEV;
 402                 goto free_tdev;
 403         }
 404
 405         return 0;
 406
 407 free_tdev:
 408         kfree(tdev);
 409         usb_set_serial_data(serial, NULL);
 410         return status;
 411 }
 412
 413
 414 static void ti_release(struct usb_serial *serial)
 415 {
 416         struct ti_device *tdev = usb_get_serial_data(serial);
 417
 418         kfree(tdev);
 419 }
 420
 421 static int ti_port_probe(struct usb_serial_port *port)
 422 {
 423         struct ti_port *tport;
 424
 425         tport = kzalloc(sizeof(*tport), GFP_KERNEL);
 426         if (!tport)
 427                 return -ENOMEM;
 428
 429         spin_lock_init(&tport->tp_lock);
 430         if (port == port->serial->port[0])
 431                 tport->tp_uart_base_addr = TI_UART1_BASE_ADDR;
 432         else
 433                 tport->tp_uart_base_addr = TI_UART2_BASE_ADDR;
 434         tport->tp_closing_wait = closing_wait;
 435         init_waitqueue_head(&tport->tp_msr_wait);
 436         init_waitqueue_head(&tport->tp_write_wait);
 437         if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE, GFP_KERNEL)) {
 438                 kfree(tport);
 439                 return -ENOMEM;
 440         }
 441         tport->tp_port = port;
 442         tport->tp_tdev = usb_get_serial_data(port->serial);
 443         tport->tp_uart_mode = 0;        /* default is RS232 */
 444
 445         usb_set_serial_port_data(port, tport);
 446
 447         return 0;
 448 }
 449
 450 static int ti_port_remove(struct usb_serial_port *port)
 451 {
 452         struct ti_port *tport;
 453
 454         tport = usb_get_serial_port_data(port);
 455         kfifo_free(&tport->write_fifo);
 456         kfree(tport);
 457
 458         return 0;
 459 }
 460
 461 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 462 {
 463         struct ti_port *tport = usb_get_serial_port_data(port);
 464         struct ti_device *tdev;
 465         struct usb_device *dev;
 466         struct urb *urb;
 467         int port_number;
 468         int status;
 469         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 470                              TI_PIPE_TIMEOUT_ENABLE |
 471                              (TI_TRANSFER_TIMEOUT << 2));
 472
 473         if (tport == NULL)
 474                 return -ENODEV;
 475
 476         dev = port->serial->dev;
 477         tdev = tport->tp_tdev;
 478
 479         /* only one open on any port on a device at a time */
 480         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 481                 return -ERESTARTSYS;
 482
 483         port_number = port->number - port->serial->minor;
 484
 485         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 486
 487         tport->tp_msr = 0;
 488         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 489
 490         /* start interrupt urb the first time a port is opened on this device */
 491         if (tdev->td_open_port_count == 0) {
 492                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 493                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 494                 if (!urb) {
 495                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 496                         status = -EINVAL;
 497                         goto release_lock;
 498                 }
 499                 urb->context = tdev;
 500                 status = usb_submit_urb(urb, GFP_KERNEL);
 501                 if (status) {
 502                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 503                         goto release_lock;
 504                 }
 505         }
 506
 507         if (tty)
 508                 ti_set_termios(tty, port, &tty->termios);
 509
 510         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 511         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 512                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 513         if (status) {
 514                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 515                         __func__, status);
 516                 goto unlink_int_urb;
 517         }
 518
 519         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 520         status = ti_command_out_sync(tdev, TI_START_PORT,
 521                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 522         if (status) {
 523                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 524                                                         __func__, status);
 525                 goto unlink_int_urb;
 526         }
 527
 528         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 529         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 530                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 531         if (status) {
 532                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 533                                                         __func__, status);
 534                 goto unlink_int_urb;
 535         }
 536         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 537                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 538         if (status) {
 539                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 540                                                         __func__, status);
 541                 goto unlink_int_urb;
 542         }
 543
 544         /* reset the data toggle on the bulk endpoints to work around bug in
 545          * host controllers where things get out of sync some times */
 546         usb_clear_halt(dev, port->write_urb->pipe);
 547         usb_clear_halt(dev, port->read_urb->pipe);
 548
 549         if (tty)
 550                 ti_set_termios(tty, port, &tty->termios);
 551
 552         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 553         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 554                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 555         if (status) {
 556                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 557                                                         __func__, status);
 558                 goto unlink_int_urb;
 559         }
 560
 561         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 562         status = ti_command_out_sync(tdev, TI_START_PORT,
 563                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 564         if (status) {
 565                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 566                                                         __func__, status);
 567                 goto unlink_int_urb;
 568         }
 569
 570         /* start read urb */
 571         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 572         urb = port->read_urb;
 573         if (!urb) {
 574                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 575                 status = -EINVAL;
 576                 goto unlink_int_urb;
 577         }
 578         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 579         urb->context = tport;
 580         status = usb_submit_urb(urb, GFP_KERNEL);
 581         if (status) {
 582                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 583                                                         __func__, status);
 584                 goto unlink_int_urb;
 585         }
 586
 587         tport->tp_is_open = 1;
 588         ++tdev->td_open_port_count;
 589
 590         goto release_lock;
 591
 592 unlink_int_urb:
 593         if (tdev->td_open_port_count == 0)
 594                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 595 release_lock:
 596         mutex_unlock(&tdev->td_open_close_lock);
 597         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 598         return status;
 599 }
 600
 601
 602 static void ti_close(struct usb_serial_port *port)
 603 {
 604         struct ti_device *tdev;
 605         struct ti_port *tport;
 606         int port_number;
 607         int status;
 608         int do_unlock;
 609
 610         tdev = usb_get_serial_data(port->serial);
 611         tport = usb_get_serial_port_data(port);
 612         if (tdev == NULL || tport == NULL)
 613                 return;
 614
 615         tport->tp_is_open = 0;
 616
 617         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 618
 619         usb_kill_urb(port->read_urb);
 620         usb_kill_urb(port->write_urb);
 621         tport->tp_write_urb_in_use = 0;
 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
 705 static void ti_throttle(struct tty_struct *tty)
 706 {
 707         struct usb_serial_port *port = tty->driver_data;
 708         struct ti_port *tport = usb_get_serial_port_data(port);
 709
 710         if (tport == NULL)
 711                 return;
 712
 713         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 714                 ti_stop_read(tport, tty);
 715
 716 }
 717
 718
 719 static void ti_unthrottle(struct tty_struct *tty)
 720 {
 721         struct usb_serial_port *port = tty->driver_data;
 722         struct ti_port *tport = usb_get_serial_port_data(port);
 723         int status;
 724
 725         if (tport == NULL)
 726                 return;
 727
 728         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 729                 status = ti_restart_read(tport, tty);
 730                 if (status)
 731                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 732                                                         __func__, status);
 733         }
 734 }
 735
 736 static int ti_get_icount(struct tty_struct *tty,
 737                 struct serial_icounter_struct *icount)
 738 {
 739         struct usb_serial_port *port = tty->driver_data;
 740         struct ti_port *tport = usb_get_serial_port_data(port);
 741         struct async_icount cnow = tport->tp_icount;
 742
 743         dev_dbg(&port->dev, "%s - TIOCGICOUNT RX=%d, TX=%d\n", __func__,
 744                 cnow.rx, cnow.tx);
 745
 746         icount->cts = cnow.cts;
 747         icount->dsr = cnow.dsr;
 748         icount->rng = cnow.rng;
 749         icount->dcd = cnow.dcd;
 750         icount->rx = cnow.rx;
 751         icount->tx = cnow.tx;
 752         icount->frame = cnow.frame;
 753         icount->overrun = cnow.overrun;
 754         icount->parity = cnow.parity;
 755         icount->brk = cnow.brk;
 756         icount->buf_overrun = cnow.buf_overrun;
 757
 758         return 0;
 759 }
 760
 761 static int ti_ioctl(struct tty_struct *tty,
 762         unsigned int cmd, unsigned long arg)
 763 {
 764         struct usb_serial_port *port = tty->driver_data;
 765         struct ti_port *tport = usb_get_serial_port_data(port);
 766         struct async_icount cnow;
 767         struct async_icount cprev;
 768
 769         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 770
 771         if (tport == NULL)
 772                 return -ENODEV;
 773
 774         switch (cmd) {
 775         case TIOCGSERIAL:
 776                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 777                 return ti_get_serial_info(tport,
 778                                 (struct serial_struct __user *)arg);
 779         case TIOCSSERIAL:
 780                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 781                 return ti_set_serial_info(tty, tport,
 782                                 (struct serial_struct __user *)arg);
 783         case TIOCMIWAIT:
 784                 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__);
 785                 cprev = tport->tp_icount;
 786                 while (1) {
 787                         interruptible_sleep_on(&tport->tp_msr_wait);
 788                         if (signal_pending(current))
 789                                 return -ERESTARTSYS;
 790                         cnow = tport->tp_icount;
 791                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 792                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 793                                 return -EIO; /* no change => error */
 794                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 795                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 796                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 797                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 798                                 return 0;
 799                         cprev = cnow;
 800                 }
 801                 break;
 802         }
 803         return -ENOIOCTLCMD;
 804 }
 805
 806
 807 static void ti_set_termios(struct tty_struct *tty,
 808                 struct usb_serial_port *port, struct ktermios *old_termios)
 809 {
 810         struct ti_port *tport = usb_get_serial_port_data(port);
 811         struct ti_uart_config *config;
 812         tcflag_t cflag, iflag;
 813         int baud;
 814         int status;
 815         int port_number = port->number - port->serial->minor;
 816         unsigned int mcr;
 817
 818         cflag = tty->termios.c_cflag;
 819         iflag = tty->termios.c_iflag;
 820
 821         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 822         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 823                 old_termios->c_cflag, old_termios->c_iflag);
 824
 825         if (tport == NULL)
 826                 return;
 827
 828         config = kmalloc(sizeof(*config), GFP_KERNEL);
 829         if (!config) {
 830                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 831                 return;
 832         }
 833
 834         config->wFlags = 0;
 835
 836         /* these flags must be set */
 837         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 838         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 839         config->bUartMode = (__u8)(tport->tp_uart_mode);
 840
 841         switch (cflag & CSIZE) {
 842         case CS5:
 843                     config->bDataBits = TI_UART_5_DATA_BITS;
 844                     break;
 845         case CS6:
 846                     config->bDataBits = TI_UART_6_DATA_BITS;
 847                     break;
 848         case CS7:
 849                     config->bDataBits = TI_UART_7_DATA_BITS;
 850                     break;
 851         default:
 852         case CS8:
 853                     config->bDataBits = TI_UART_8_DATA_BITS;
 854                     break;
 855         }
 856
 857         /* CMSPAR isn't supported by this driver */
 858         tty->termios.c_cflag &= ~CMSPAR;
 859
 860         if (cflag & PARENB) {
 861                 if (cflag & PARODD) {
 862                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 863                         config->bParity = TI_UART_ODD_PARITY;
 864                 } else {
 865                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 866                         config->bParity = TI_UART_EVEN_PARITY;
 867                 }
 868         } else {
 869                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 870                 config->bParity = TI_UART_NO_PARITY;
 871         }
 872
 873         if (cflag & CSTOPB)
 874                 config->bStopBits = TI_UART_2_STOP_BITS;
 875         else
 876                 config->bStopBits = TI_UART_1_STOP_BITS;
 877
 878         if (cflag & CRTSCTS) {
 879                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 880                 if ((cflag & CBAUD) != B0)
 881                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 882                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 883         } else {
 884                 tty->hw_stopped = 0;
 885                 ti_restart_read(tport, tty);
 886         }
 887
 888         if (I_IXOFF(tty) || I_IXON(tty)) {
 889                 config->cXon  = START_CHAR(tty);
 890                 config->cXoff = STOP_CHAR(tty);
 891
 892                 if (I_IXOFF(tty))
 893                         config->wFlags |= TI_UART_ENABLE_X_IN;
 894                 else
 895                         ti_restart_read(tport, tty);
 896
 897                 if (I_IXON(tty))
 898                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 899         }
 900
 901         baud = tty_get_baud_rate(tty);
 902         if (!baud)
 903                 baud = 9600;
 904         if (tport->tp_tdev->td_is_3410)
 905                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 906         else
 907                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 908
 909         /* FIXME: Should calculate resulting baud here and report it back */
 910         if ((cflag & CBAUD) != B0)
 911                 tty_encode_baud_rate(tty, baud, baud);
 912
 913         dev_dbg(&port->dev,
 914                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 915                 __func__, baud, config->wBaudRate, config->wFlags,
 916                 config->bDataBits, config->bParity, config->bStopBits,
 917                 config->cXon, config->cXoff, config->bUartMode);
 918
 919         cpu_to_be16s(&config->wBaudRate);
 920         cpu_to_be16s(&config->wFlags);
 921
 922         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 923                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 924                 sizeof(*config));
 925         if (status)
 926                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 927                                         __func__, port_number, status);
 928
 929         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 930         mcr = tport->tp_shadow_mcr;
 931         /* if baud rate is B0, clear RTS and DTR */
 932         if ((cflag & CBAUD) == B0)
 933                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 934         status = ti_set_mcr(tport, mcr);
 935         if (status)
 936                 dev_err(&port->dev,
 937                         "%s - cannot set modem control on port %d, %d\n",
 938                                                 __func__, port_number, status);
 939
 940         kfree(config);
 941 }
 942
 943
 944 static int ti_tiocmget(struct tty_struct *tty)
 945 {
 946         struct usb_serial_port *port = tty->driver_data;
 947         struct ti_port *tport = usb_get_serial_port_data(port);
 948         unsigned int result;
 949         unsigned int msr;
 950         unsigned int mcr;
 951         unsigned long flags;
 952
 953         if (tport == NULL)
 954                 return -ENODEV;
 955
 956         spin_lock_irqsave(&tport->tp_lock, flags);
 957         msr = tport->tp_msr;
 958         mcr = tport->tp_shadow_mcr;
 959         spin_unlock_irqrestore(&tport->tp_lock, flags);
 960
 961         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 962                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 963                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 964                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 965                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 966                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 967                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 968
 969         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 970
 971         return result;
 972 }
 973
 974
 975 static int ti_tiocmset(struct tty_struct *tty,
 976                                 unsigned int set, unsigned int clear)
 977 {
 978         struct usb_serial_port *port = tty->driver_data;
 979         struct ti_port *tport = usb_get_serial_port_data(port);
 980         unsigned int mcr;
 981         unsigned long flags;
 982
 983         if (tport == NULL)
 984                 return -ENODEV;
 985
 986         spin_lock_irqsave(&tport->tp_lock, flags);
 987         mcr = tport->tp_shadow_mcr;
 988
 989         if (set & TIOCM_RTS)
 990                 mcr |= TI_MCR_RTS;
 991         if (set & TIOCM_DTR)
 992                 mcr |= TI_MCR_DTR;
 993         if (set & TIOCM_LOOP)
 994                 mcr |= TI_MCR_LOOP;
 995
 996         if (clear & TIOCM_RTS)
 997                 mcr &= ~TI_MCR_RTS;
 998         if (clear & TIOCM_DTR)
 999                 mcr &= ~TI_MCR_DTR;
1000         if (clear & TIOCM_LOOP)
1001                 mcr &= ~TI_MCR_LOOP;
1002         spin_unlock_irqrestore(&tport->tp_lock, flags);
1003
1004         return ti_set_mcr(tport, mcr);
1005 }
1006
1007
1008 static void ti_break(struct tty_struct *tty, int break_state)
1009 {
1010         struct usb_serial_port *port = tty->driver_data;
1011         struct ti_port *tport = usb_get_serial_port_data(port);
1012         int status;
1013
1014         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1015
1016         if (tport == NULL)
1017                 return;
1018
1019         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1020
1021         status = ti_write_byte(port, tport->tp_tdev,
1022                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1023                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1024
1025         if (status)
1026                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1027 }
1028
1029
1030 static void ti_interrupt_callback(struct urb *urb)
1031 {
1032         struct ti_device *tdev = urb->context;
1033         struct usb_serial_port *port;
1034         struct usb_serial *serial = tdev->td_serial;
1035         struct ti_port *tport;
1036         struct device *dev = &urb->dev->dev;
1037         unsigned char *data = urb->transfer_buffer;
1038         int length = urb->actual_length;
1039         int port_number;
1040         int function;
1041         int status = urb->status;
1042         int retval;
1043         __u8 msr;
1044
1045         switch (status) {
1046         case 0:
1047                 break;
1048         case -ECONNRESET:
1049         case -ENOENT:
1050         case -ESHUTDOWN:
1051                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1052                 tdev->td_urb_error = 1;
1053                 return;
1054         default:
1055                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1056                 tdev->td_urb_error = 1;
1057                 goto exit;
1058         }
1059
1060         if (length != 2) {
1061                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1062                 goto exit;
1063         }
1064
1065         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1066                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1067                 goto exit;
1068         }
1069
1070         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1071         function = TI_GET_FUNC_FROM_CODE(data[0]);
1072
1073         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1074                 __func__, port_number, function, data[1]);
1075
1076         if (port_number >= serial->num_ports) {
1077                 dev_err(dev, "%s - bad port number, %d\n",
1078                                                 __func__, port_number);
1079                 goto exit;
1080         }
1081
1082         port = serial->port[port_number];
1083
1084         tport = usb_get_serial_port_data(port);
1085         if (!tport)
1086                 goto exit;
1087
1088         switch (function) {
1089         case TI_CODE_DATA_ERROR:
1090                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1091                         __func__, port_number, data[1]);
1092                 break;
1093
1094         case TI_CODE_MODEM_STATUS:
1095                 msr = data[1];
1096                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1097                 ti_handle_new_msr(tport, msr);
1098                 break;
1099
1100         default:
1101                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1102                                                         __func__, data[1]);
1103                 break;
1104         }
1105
1106 exit:
1107         retval = usb_submit_urb(urb, GFP_ATOMIC);
1108         if (retval)
1109                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1110                         __func__, retval);
1111 }
1112
1113
1114 static void ti_bulk_in_callback(struct urb *urb)
1115 {
1116         struct ti_port *tport = urb->context;
1117         struct usb_serial_port *port = tport->tp_port;
1118         struct device *dev = &urb->dev->dev;
1119         int status = urb->status;
1120         int retval = 0;
1121
1122         switch (status) {
1123         case 0:
1124                 break;
1125         case -ECONNRESET:
1126         case -ENOENT:
1127         case -ESHUTDOWN:
1128                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1129                 tport->tp_tdev->td_urb_error = 1;
1130                 wake_up_interruptible(&tport->tp_write_wait);
1131                 return;
1132         default:
1133                 dev_err(dev, "%s - nonzero urb status, %d\n",
1134                         __func__, status);
1135                 tport->tp_tdev->td_urb_error = 1;
1136                 wake_up_interruptible(&tport->tp_write_wait);
1137         }
1138
1139         if (status == -EPIPE)
1140                 goto exit;
1141
1142         if (status) {
1143                 dev_err(dev, "%s - stopping read!\n", __func__);
1144                 return;
1145         }
1146
1147         if (urb->actual_length) {
1148                 usb_serial_debug_data(dev, __func__, urb->actual_length,
1149                                       urb->transfer_buffer);
1150
1151                 if (!tport->tp_is_open)
1152                         dev_dbg(dev, "%s - port closed, dropping data\n",
1153                                 __func__);
1154                 else
1155                         ti_recv(port, urb->transfer_buffer, urb->actual_length);
1156                 spin_lock(&tport->tp_lock);
1157                 tport->tp_icount.rx += urb->actual_length;
1158                 spin_unlock(&tport->tp_lock);
1159         }
1160
1161 exit:
1162         /* continue to read unless stopping */
1163         spin_lock(&tport->tp_lock);
1164         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1165                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1166         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1167                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1168
1169         spin_unlock(&tport->tp_lock);
1170         if (retval)
1171                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1172                         __func__, retval);
1173 }
1174
1175
1176 static void ti_bulk_out_callback(struct urb *urb)
1177 {
1178         struct ti_port *tport = urb->context;
1179         struct usb_serial_port *port = tport->tp_port;
1180         int status = urb->status;
1181
1182         tport->tp_write_urb_in_use = 0;
1183
1184         switch (status) {
1185         case 0:
1186                 break;
1187         case -ECONNRESET:
1188         case -ENOENT:
1189         case -ESHUTDOWN:
1190                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1191                 tport->tp_tdev->td_urb_error = 1;
1192                 wake_up_interruptible(&tport->tp_write_wait);
1193                 return;
1194         default:
1195                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1196                         __func__, status);
1197                 tport->tp_tdev->td_urb_error = 1;
1198                 wake_up_interruptible(&tport->tp_write_wait);
1199         }
1200
1201         /* send any buffered data */
1202         ti_send(tport);
1203 }
1204
1205
1206 static void ti_recv(struct usb_serial_port *port, unsigned char *data,
1207                 int length)
1208 {
1209         int cnt;
1210
1211         do {
1212                 cnt = tty_insert_flip_string(&port->port, data, length);
1213                 if (cnt < length) {
1214                         dev_err(&port->dev, "%s - dropping data, %d bytes lost\n",
1215                                                 __func__, length - cnt);
1216                         if (cnt == 0)
1217                                 break;
1218                 }
1219                 tty_flip_buffer_push(&port->port);
1220                 data += cnt;
1221                 length -= cnt;
1222         } while (length > 0);
1223 }
1224
1225
1226 static void ti_send(struct ti_port *tport)
1227 {
1228         int count, result;
1229         struct usb_serial_port *port = tport->tp_port;
1230         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1231         unsigned long flags;
1232
1233         spin_lock_irqsave(&tport->tp_lock, flags);
1234
1235         if (tport->tp_write_urb_in_use)
1236                 goto unlock;
1237
1238         count = kfifo_out(&tport->write_fifo,
1239                                 port->write_urb->transfer_buffer,
1240                                 port->bulk_out_size);
1241
1242         if (count == 0)
1243                 goto unlock;
1244
1245         tport->tp_write_urb_in_use = 1;
1246
1247         spin_unlock_irqrestore(&tport->tp_lock, flags);
1248
1249         usb_serial_debug_data(&port->dev, __func__, count,
1250                               port->write_urb->transfer_buffer);
1251
1252         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1253                            usb_sndbulkpipe(port->serial->dev,
1254                                             port->bulk_out_endpointAddress),
1255                            port->write_urb->transfer_buffer, count,
1256                            ti_bulk_out_callback, tport);
1257
1258         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1259         if (result) {
1260                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1261                                                         __func__, result);
1262                 tport->tp_write_urb_in_use = 0;
1263                 /* TODO: reschedule ti_send */
1264         } else {
1265                 spin_lock_irqsave(&tport->tp_lock, flags);
1266                 tport->tp_icount.tx += count;
1267                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1268         }
1269
1270         /* more room in the buffer for new writes, wakeup */
1271         if (tty)
1272                 tty_wakeup(tty);
1273         tty_kref_put(tty);
1274         wake_up_interruptible(&tport->tp_write_wait);
1275         return;
1276 unlock:
1277         spin_unlock_irqrestore(&tport->tp_lock, flags);
1278         tty_kref_put(tty);
1279         return;
1280 }
1281
1282
1283 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1284 {
1285         unsigned long flags;
1286         int status;
1287
1288         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1289                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1290                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1291
1292         spin_lock_irqsave(&tport->tp_lock, flags);
1293         if (!status)
1294                 tport->tp_shadow_mcr = mcr;
1295         spin_unlock_irqrestore(&tport->tp_lock, flags);
1296
1297         return status;
1298 }
1299
1300
1301 static int ti_get_lsr(struct ti_port *tport)
1302 {
1303         int size, status;
1304         struct ti_device *tdev = tport->tp_tdev;
1305         struct usb_serial_port *port = tport->tp_port;
1306         int port_number = port->number - port->serial->minor;
1307         struct ti_port_status *data;
1308
1309         size = sizeof(struct ti_port_status);
1310         data = kmalloc(size, GFP_KERNEL);
1311         if (!data) {
1312                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1313                 return -ENOMEM;
1314         }
1315
1316         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1317                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1318         if (status) {
1319                 dev_err(&port->dev,
1320                         "%s - get port status command failed, %d\n",
1321                                                         __func__, status);
1322                 goto free_data;
1323         }
1324
1325         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1326
1327         tport->tp_lsr = data->bLSR;
1328
1329 free_data:
1330         kfree(data);
1331         return status;
1332 }
1333
1334
1335 static int ti_get_serial_info(struct ti_port *tport,
1336         struct serial_struct __user *ret_arg)
1337 {
1338         struct usb_serial_port *port = tport->tp_port;
1339         struct serial_struct ret_serial;
1340
1341         if (!ret_arg)
1342                 return -EFAULT;
1343
1344         memset(&ret_serial, 0, sizeof(ret_serial));
1345
1346         ret_serial.type = PORT_16550A;
1347         ret_serial.line = port->serial->minor;
1348         ret_serial.port = port->number - port->serial->minor;
1349         ret_serial.flags = tport->tp_flags;
1350         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1351         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1352         ret_serial.closing_wait = tport->tp_closing_wait;
1353
1354         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1355                 return -EFAULT;
1356
1357         return 0;
1358 }
1359
1360
1361 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1362         struct serial_struct __user *new_arg)
1363 {
1364         struct serial_struct new_serial;
1365
1366         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1367                 return -EFAULT;
1368
1369         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1370         tport->tp_closing_wait = new_serial.closing_wait;
1371
1372         return 0;
1373 }
1374
1375
1376 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1377 {
1378         struct async_icount *icount;
1379         struct tty_struct *tty;
1380         unsigned long flags;
1381
1382         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1383
1384         if (msr & TI_MSR_DELTA_MASK) {
1385                 spin_lock_irqsave(&tport->tp_lock, flags);
1386                 icount = &tport->tp_icount;
1387                 if (msr & TI_MSR_DELTA_CTS)
1388                         icount->cts++;
1389                 if (msr & TI_MSR_DELTA_DSR)
1390                         icount->dsr++;
1391                 if (msr & TI_MSR_DELTA_CD)
1392                         icount->dcd++;
1393                 if (msr & TI_MSR_DELTA_RI)
1394                         icount->rng++;
1395                 wake_up_interruptible(&tport->tp_msr_wait);
1396                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1397         }
1398
1399         tport->tp_msr = msr & TI_MSR_MASK;
1400
1401         /* handle CTS flow control */
1402         tty = tty_port_tty_get(&tport->tp_port->port);
1403         if (tty && C_CRTSCTS(tty)) {
1404                 if (msr & TI_MSR_CTS) {
1405                         tty->hw_stopped = 0;
1406                         tty_wakeup(tty);
1407                 } else {
1408                         tty->hw_stopped = 1;
1409                 }
1410         }
1411         tty_kref_put(tty);
1412 }
1413
1414
1415 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1416 {
1417         struct ti_device *tdev = tport->tp_tdev;
1418         struct usb_serial_port *port = tport->tp_port;
1419         wait_queue_t wait;
1420
1421         spin_lock_irq(&tport->tp_lock);
1422
1423         /* wait for data to drain from the buffer */
1424         tdev->td_urb_error = 0;
1425         init_waitqueue_entry(&wait, current);
1426         add_wait_queue(&tport->tp_write_wait, &wait);
1427         for (;;) {
1428                 set_current_state(TASK_INTERRUPTIBLE);
1429                 if (kfifo_len(&tport->write_fifo) == 0
1430                 || timeout == 0 || signal_pending(current)
1431                 || tdev->td_urb_error
1432                 || port->serial->disconnected)  /* disconnect */
1433                         break;
1434                 spin_unlock_irq(&tport->tp_lock);
1435                 timeout = schedule_timeout(timeout);
1436                 spin_lock_irq(&tport->tp_lock);
1437         }
1438         set_current_state(TASK_RUNNING);
1439         remove_wait_queue(&tport->tp_write_wait, &wait);
1440
1441         /* flush any remaining data in the buffer */
1442         if (flush)
1443                 kfifo_reset_out(&tport->write_fifo);
1444
1445         spin_unlock_irq(&tport->tp_lock);
1446
1447         mutex_lock(&port->serial->disc_mutex);
1448         /* wait for data to drain from the device */
1449         /* wait for empty tx register, plus 20 ms */
1450         timeout += jiffies;
1451         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1452         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1453         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1454         && !port->serial->disconnected) {
1455                 if (ti_get_lsr(tport))
1456                         break;
1457                 mutex_unlock(&port->serial->disc_mutex);
1458                 msleep_interruptible(20);
1459                 mutex_lock(&port->serial->disc_mutex);
1460         }
1461         mutex_unlock(&port->serial->disc_mutex);
1462 }
1463
1464
1465 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1466 {
1467         unsigned long flags;
1468
1469         spin_lock_irqsave(&tport->tp_lock, flags);
1470
1471         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1472                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1473
1474         spin_unlock_irqrestore(&tport->tp_lock, flags);
1475 }
1476
1477
1478 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1479 {
1480         struct urb *urb;
1481         int status = 0;
1482         unsigned long flags;
1483
1484         spin_lock_irqsave(&tport->tp_lock, flags);
1485
1486         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1487                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1488                 urb = tport->tp_port->read_urb;
1489                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1490                 urb->context = tport;
1491                 status = usb_submit_urb(urb, GFP_KERNEL);
1492         } else  {
1493                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1494                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1495         }
1496
1497         return status;
1498 }
1499
1500
1501 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1502         __u16 moduleid, __u16 value, __u8 *data, int size)
1503 {
1504         int status;
1505
1506         status = usb_control_msg(tdev->td_serial->dev,
1507                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1508                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1509                 value, moduleid, data, size, 1000);
1510
1511         if (status == size)
1512                 status = 0;
1513
1514         if (status > 0)
1515                 status = -ECOMM;
1516
1517         return status;
1518 }
1519
1520
1521 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1522         __u16 moduleid, __u16 value, __u8 *data, int size)
1523 {
1524         int status;
1525
1526         status = usb_control_msg(tdev->td_serial->dev,
1527                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1528                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1529                 value, moduleid, data, size, 1000);
1530
1531         if (status == size)
1532                 status = 0;
1533
1534         if (status > 0)
1535                 status = -ECOMM;
1536
1537         return status;
1538 }
1539
1540
1541 static int ti_write_byte(struct usb_serial_port *port,
1542                         struct ti_device *tdev, unsigned long addr,
1543                         __u8 mask, __u8 byte)
1544 {
1545         int status;
1546         unsigned int size;
1547         struct ti_write_data_bytes *data;
1548
1549         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1550                 addr, mask, byte);
1551
1552         size = sizeof(struct ti_write_data_bytes) + 2;
1553         data = kmalloc(size, GFP_KERNEL);
1554         if (!data) {
1555                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1556                 return -ENOMEM;
1557         }
1558
1559         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1560         data->bDataType = TI_RW_DATA_BYTE;
1561         data->bDataCounter = 1;
1562         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1563         data->wBaseAddrLo = cpu_to_be16(addr);
1564         data->bData[0] = mask;
1565         data->bData[1] = byte;
1566
1567         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1568                 (__u8 *)data, size);
1569
1570         if (status < 0)
1571                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1572
1573         kfree(data);
1574
1575         return status;
1576 }
1577
1578 static int ti_do_download(struct usb_device *dev, int pipe,
1579                                                 u8 *buffer, int size)
1580 {
1581         int pos;
1582         u8 cs = 0;
1583         int done;
1584         struct ti_firmware_header *header;
1585         int status = 0;
1586         int len;
1587
1588         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1589                 cs = (__u8)(cs + buffer[pos]);
1590
1591         header = (struct ti_firmware_header *)buffer;
1592         header->wLength = cpu_to_le16((__u16)(size
1593                                         - sizeof(struct ti_firmware_header)));
1594         header->bCheckSum = cs;
1595
1596         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1597         for (pos = 0; pos < size; pos += done) {
1598                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1599                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1600                                                                 &done, 1000);
1601                 if (status)
1602                         break;
1603         }
1604         return status;
1605 }
1606
1607 static int ti_download_firmware(struct ti_device *tdev)
1608 {
1609         int status;
1610         int buffer_size;
1611         __u8 *buffer;
1612         struct usb_device *dev = tdev->td_serial->dev;
1613         unsigned int pipe = usb_sndbulkpipe(dev,
1614                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1615         const struct firmware *fw_p;
1616         char buf[32];
1617
1618         /* try ID specific firmware first, then try generic firmware */
1619         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1620             dev->descriptor.idProduct);
1621         status = request_firmware(&fw_p, buf, &dev->dev);
1622
1623         if (status != 0) {
1624                 buf[0] = '\0';
1625                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1626                         switch (dev->descriptor.idProduct) {
1627                         case MTS_CDMA_PRODUCT_ID:
1628                                 strcpy(buf, "mts_cdma.fw");
1629                                 break;
1630                         case MTS_GSM_PRODUCT_ID:
1631                                 strcpy(buf, "mts_gsm.fw");
1632                                 break;
1633                         case MTS_EDGE_PRODUCT_ID:
1634                                 strcpy(buf, "mts_edge.fw");
1635                                 break;
1636                         case MTS_MT9234MU_PRODUCT_ID:
1637                                 strcpy(buf, "mts_mt9234mu.fw");
1638                                 break;
1639                         case MTS_MT9234ZBA_PRODUCT_ID:
1640                                 strcpy(buf, "mts_mt9234zba.fw");
1641                                 break;
1642                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1643                                 strcpy(buf, "mts_mt9234zba.fw");
1644                                 break;                  }
1645                 }
1646                 if (buf[0] == '\0') {
1647                         if (tdev->td_is_3410)
1648                                 strcpy(buf, "ti_3410.fw");
1649                         else
1650                                 strcpy(buf, "ti_5052.fw");
1651                 }
1652                 status = request_firmware(&fw_p, buf, &dev->dev);
1653         }
1654         if (status) {
1655                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1656                 return -ENOENT;
1657         }
1658         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1659                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1660                 release_firmware(fw_p);
1661                 return -ENOENT;
1662         }
1663
1664         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1665         buffer = kmalloc(buffer_size, GFP_KERNEL);
1666         if (buffer) {
1667                 memcpy(buffer, fw_p->data, fw_p->size);
1668                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1669                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1670                 kfree(buffer);
1671         } else {
1672                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1673                 status = -ENOMEM;
1674         }
1675         release_firmware(fw_p);
1676         if (status) {
1677                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1678                                                         __func__, status);
1679                 return status;
1680         }
1681
1682         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1683
1684         return 0;
1685 }