Pileus Git - ~andy/linux/blob - 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_VERSION       "v0.10"
  44 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  45 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  46
  47 #define TI_FIRMWARE_BUF_SIZE    16284
  48
  49 #define TI_WRITE_BUF_SIZE       1024
  50
  51 #define TI_TRANSFER_TIMEOUT     2
  52
  53 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
  54
  55 /* supported setserial flags */
  56 #define TI_SET_SERIAL_FLAGS     0
  57
  58 /* read urb states */
  59 #define TI_READ_URB_RUNNING     0
  60 #define TI_READ_URB_STOPPING    1
  61 #define TI_READ_URB_STOPPED     2
  62
  63 #define TI_EXTRA_VID_PID_COUNT  5
  64
  65
  66 /* Structures */
  67
  68 struct ti_port {
  69         int                     tp_is_open;
  70         __u8                    tp_msr;
  71         __u8                    tp_lsr;
  72         __u8                    tp_shadow_mcr;
  73         __u8                    tp_uart_mode;   /* 232 or 485 modes */
  74         unsigned int            tp_uart_base_addr;
  75         int                     tp_flags;
  76         int                     tp_closing_wait;/* in .01 secs */
  77         struct async_icount     tp_icount;
  78         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
  79         wait_queue_head_t       tp_write_wait;
  80         struct ti_device        *tp_tdev;
  81         struct usb_serial_port  *tp_port;
  82         spinlock_t              tp_lock;
  83         int                     tp_read_urb_state;
  84         int                     tp_write_urb_in_use;
  85         struct kfifo            write_fifo;
  86 };
  87
  88 struct ti_device {
  89         struct mutex            td_open_close_lock;
  90         int                     td_open_port_count;
  91         struct usb_serial       *td_serial;
  92         int                     td_is_3410;
  93         int                     td_urb_error;
  94 };
  95
  96
  97 /* Function Declarations */
  98
  99 static int ti_startup(struct usb_serial *serial);
 100 static void ti_release(struct usb_serial *serial);
 101 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port);
 102 static void ti_close(struct usb_serial_port *port);
 103 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 104                 const unsigned char *data, int count);
 105 static int ti_write_room(struct tty_struct *tty);
 106 static int ti_chars_in_buffer(struct tty_struct *tty);
 107 static void ti_throttle(struct tty_struct *tty);
 108 static void ti_unthrottle(struct tty_struct *tty);
 109 static int ti_ioctl(struct tty_struct *tty,
 110                 unsigned int cmd, unsigned long arg);
 111 static int ti_get_icount(struct tty_struct *tty,
 112                 struct serial_icounter_struct *icount);
 113 static void ti_set_termios(struct tty_struct *tty,
 114                 struct usb_serial_port *port, struct ktermios *old_termios);
 115 static int ti_tiocmget(struct tty_struct *tty);
 116 static int ti_tiocmset(struct tty_struct *tty,
 117                 unsigned int set, unsigned int clear);
 118 static void ti_break(struct tty_struct *tty, int break_state);
 119 static void ti_interrupt_callback(struct urb *urb);
 120 static void ti_bulk_in_callback(struct urb *urb);
 121 static void ti_bulk_out_callback(struct urb *urb);
 122
 123 static void ti_recv(struct device *dev, struct tty_struct *tty,
 124         unsigned char *data, int length);
 125 static void ti_send(struct ti_port *tport);
 126 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 127 static int ti_get_lsr(struct ti_port *tport);
 128 static int ti_get_serial_info(struct ti_port *tport,
 129         struct serial_struct __user *ret_arg);
 130 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
 131         struct serial_struct __user *new_arg);
 132 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 133
 134 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 135
 136 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 137 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 138
 139 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 140         __u16 moduleid, __u16 value, __u8 *data, int size);
 141 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 142         __u16 moduleid, __u16 value, __u8 *data, int size);
 143
 144 static int ti_write_byte(struct usb_serial_port *port, struct ti_device *tdev,
 145                          unsigned long addr, __u8 mask, __u8 byte);
 146
 147 static int ti_download_firmware(struct ti_device *tdev);
 148
 149
 150 /* Data */
 151
 152 /* module parameters */
 153 static bool debug;
 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         .open                   = ti_open,
 227         .close                  = ti_close,
 228         .write                  = ti_write,
 229         .write_room             = ti_write_room,
 230         .chars_in_buffer        = ti_chars_in_buffer,
 231         .throttle               = ti_throttle,
 232         .unthrottle             = ti_unthrottle,
 233         .ioctl                  = ti_ioctl,
 234         .set_termios            = ti_set_termios,
 235         .tiocmget               = ti_tiocmget,
 236         .tiocmset               = ti_tiocmset,
 237         .get_icount             = ti_get_icount,
 238         .break_ctl              = ti_break,
 239         .read_int_callback      = ti_interrupt_callback,
 240         .read_bulk_callback     = ti_bulk_in_callback,
 241         .write_bulk_callback    = ti_bulk_out_callback,
 242 };
 243
 244 static struct usb_serial_driver ti_2port_device = {
 245         .driver = {
 246                 .owner          = THIS_MODULE,
 247                 .name           = "ti_usb_3410_5052_2",
 248         },
 249         .description            = "TI USB 5052 2 port adapter",
 250         .id_table               = ti_id_table_5052,
 251         .num_ports              = 2,
 252         .attach                 = ti_startup,
 253         .release                = ti_release,
 254         .open                   = ti_open,
 255         .close                  = ti_close,
 256         .write                  = ti_write,
 257         .write_room             = ti_write_room,
 258         .chars_in_buffer        = ti_chars_in_buffer,
 259         .throttle               = ti_throttle,
 260         .unthrottle             = ti_unthrottle,
 261         .ioctl                  = ti_ioctl,
 262         .set_termios            = ti_set_termios,
 263         .tiocmget               = ti_tiocmget,
 264         .tiocmset               = ti_tiocmset,
 265         .get_icount             = ti_get_icount,
 266         .break_ctl              = ti_break,
 267         .read_int_callback      = ti_interrupt_callback,
 268         .read_bulk_callback     = ti_bulk_in_callback,
 269         .write_bulk_callback    = ti_bulk_out_callback,
 270 };
 271
 272 static struct usb_serial_driver * const serial_drivers[] = {
 273         &ti_1port_device, &ti_2port_device, NULL
 274 };
 275
 276 /* Module */
 277
 278 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 279 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 280 MODULE_VERSION(TI_DRIVER_VERSION);
 281 MODULE_LICENSE("GPL");
 282
 283 MODULE_FIRMWARE("ti_3410.fw");
 284 MODULE_FIRMWARE("ti_5052.fw");
 285 MODULE_FIRMWARE("mts_cdma.fw");
 286 MODULE_FIRMWARE("mts_gsm.fw");
 287 MODULE_FIRMWARE("mts_edge.fw");
 288 MODULE_FIRMWARE("mts_mt9234mu.fw");
 289 MODULE_FIRMWARE("mts_mt9234zba.fw");
 290
 291 module_param(debug, bool, S_IRUGO | S_IWUSR);
 292 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 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         int ret;
 320
 321         /* insert extra vendor and product ids */
 322         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 323         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 324         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 325                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 326                 ti_id_table_3410[j].idProduct = product_3410[i];
 327                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 328                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 329                 ti_id_table_combined[c].idProduct = product_3410[i];
 330                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 331         }
 332         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 333         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 334                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 335                 ti_id_table_5052[j].idProduct = product_5052[i];
 336                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 337                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 338                 ti_id_table_combined[c].idProduct = product_5052[i];
 339                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 340         }
 341
 342         ret = usb_serial_register_drivers(serial_drivers, KBUILD_MODNAME, ti_id_table_combined);
 343         if (ret == 0)
 344                 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 345                                TI_DRIVER_DESC "\n");
 346         return ret;
 347 }
 348
 349 static void __exit ti_exit(void)
 350 {
 351         usb_serial_deregister_drivers(serial_drivers);
 352 }
 353
 354 module_init(ti_init);
 355 module_exit(ti_exit);
 356
 357
 358 static int ti_startup(struct usb_serial *serial)
 359 {
 360         struct ti_device *tdev;
 361         struct ti_port *tport;
 362         struct usb_device *dev = serial->dev;
 363         int status;
 364         int i;
 365
 366
 367         dev_dbg(&dev->dev,
 368                 "%s - product 0x%4X, num configurations %d, configuration value %d",
 369                 __func__, le16_to_cpu(dev->descriptor.idProduct),
 370                 dev->descriptor.bNumConfigurations,
 371                 dev->actconfig->desc.bConfigurationValue);
 372
 373         /* create device structure */
 374         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 375         if (tdev == NULL) {
 376                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 377                 return -ENOMEM;
 378         }
 379         mutex_init(&tdev->td_open_close_lock);
 380         tdev->td_serial = serial;
 381         usb_set_serial_data(serial, tdev);
 382
 383         /* determine device type */
 384         if (usb_match_id(serial->interface, ti_id_table_3410))
 385                 tdev->td_is_3410 = 1;
 386         dev_dbg(&dev->dev, "%s - device type is %s\n", __func__,
 387                 tdev->td_is_3410 ? "3410" : "5052");
 388
 389         /* if we have only 1 configuration, download firmware */
 390         if (dev->descriptor.bNumConfigurations == 1) {
 391                 status = ti_download_firmware(tdev);
 392
 393                 if (status != 0)
 394                         goto free_tdev;
 395
 396                 /* 3410 must be reset, 5052 resets itself */
 397                 if (tdev->td_is_3410) {
 398                         msleep_interruptible(100);
 399                         usb_reset_device(dev);
 400                 }
 401
 402                 status = -ENODEV;
 403                 goto free_tdev;
 404         }
 405
 406         /* the second configuration must be set */
 407         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 408                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 409                 status = status ? status : -ENODEV;
 410                 goto free_tdev;
 411         }
 412
 413         /* set up port structures */
 414         for (i = 0; i < serial->num_ports; ++i) {
 415                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 416                 if (tport == NULL) {
 417                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 418                         status = -ENOMEM;
 419                         goto free_tports;
 420                 }
 421                 spin_lock_init(&tport->tp_lock);
 422                 tport->tp_uart_base_addr = (i == 0 ?
 423                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 424                 tport->tp_closing_wait = closing_wait;
 425                 init_waitqueue_head(&tport->tp_msr_wait);
 426                 init_waitqueue_head(&tport->tp_write_wait);
 427                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 428                                                                 GFP_KERNEL)) {
 429                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 430                         kfree(tport);
 431                         status = -ENOMEM;
 432                         goto free_tports;
 433                 }
 434                 tport->tp_port = serial->port[i];
 435                 tport->tp_tdev = tdev;
 436                 usb_set_serial_port_data(serial->port[i], tport);
 437                 tport->tp_uart_mode = 0;        /* default is RS232 */
 438         }
 439
 440         return 0;
 441
 442 free_tports:
 443         for (--i; i >= 0; --i) {
 444                 tport = usb_get_serial_port_data(serial->port[i]);
 445                 kfifo_free(&tport->write_fifo);
 446                 kfree(tport);
 447                 usb_set_serial_port_data(serial->port[i], NULL);
 448         }
 449 free_tdev:
 450         kfree(tdev);
 451         usb_set_serial_data(serial, NULL);
 452         return status;
 453 }
 454
 455
 456 static void ti_release(struct usb_serial *serial)
 457 {
 458         int i;
 459         struct ti_device *tdev = usb_get_serial_data(serial);
 460         struct ti_port *tport;
 461
 462         for (i = 0; i < serial->num_ports; ++i) {
 463                 tport = usb_get_serial_port_data(serial->port[i]);
 464                 if (tport) {
 465                         kfifo_free(&tport->write_fifo);
 466                         kfree(tport);
 467                 }
 468         }
 469
 470         kfree(tdev);
 471 }
 472
 473
 474 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 475 {
 476         struct ti_port *tport = usb_get_serial_port_data(port);
 477         struct ti_device *tdev;
 478         struct usb_device *dev;
 479         struct urb *urb;
 480         int port_number;
 481         int status;
 482         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 483                              TI_PIPE_TIMEOUT_ENABLE |
 484                              (TI_TRANSFER_TIMEOUT << 2));
 485
 486         if (tport == NULL)
 487                 return -ENODEV;
 488
 489         dev = port->serial->dev;
 490         tdev = tport->tp_tdev;
 491
 492         /* only one open on any port on a device at a time */
 493         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 494                 return -ERESTARTSYS;
 495
 496         port_number = port->number - port->serial->minor;
 497
 498         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 499
 500         tport->tp_msr = 0;
 501         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 502
 503         /* start interrupt urb the first time a port is opened on this device */
 504         if (tdev->td_open_port_count == 0) {
 505                 dev_dbg(&port->dev, "%s - start interrupt in urb\n", __func__);
 506                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 507                 if (!urb) {
 508                         dev_err(&port->dev, "%s - no interrupt urb\n", __func__);
 509                         status = -EINVAL;
 510                         goto release_lock;
 511                 }
 512                 urb->context = tdev;
 513                 status = usb_submit_urb(urb, GFP_KERNEL);
 514                 if (status) {
 515                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __func__, status);
 516                         goto release_lock;
 517                 }
 518         }
 519
 520         if (tty)
 521                 ti_set_termios(tty, port, tty->termios);
 522
 523         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT\n", __func__);
 524         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 525                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 526         if (status) {
 527                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 528                         __func__, status);
 529                 goto unlink_int_urb;
 530         }
 531
 532         dev_dbg(&port->dev, "%s - sending TI_START_PORT\n", __func__);
 533         status = ti_command_out_sync(tdev, TI_START_PORT,
 534                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 535         if (status) {
 536                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 537                                                         __func__, status);
 538                 goto unlink_int_urb;
 539         }
 540
 541         dev_dbg(&port->dev, "%s - sending TI_PURGE_PORT\n", __func__);
 542         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 543                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 544         if (status) {
 545                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 546                                                         __func__, status);
 547                 goto unlink_int_urb;
 548         }
 549         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 550                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 551         if (status) {
 552                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 553                                                         __func__, status);
 554                 goto unlink_int_urb;
 555         }
 556
 557         /* reset the data toggle on the bulk endpoints to work around bug in
 558          * host controllers where things get out of sync some times */
 559         usb_clear_halt(dev, port->write_urb->pipe);
 560         usb_clear_halt(dev, port->read_urb->pipe);
 561
 562         if (tty)
 563                 ti_set_termios(tty, port, tty->termios);
 564
 565         dev_dbg(&port->dev, "%s - sending TI_OPEN_PORT (2)\n", __func__);
 566         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 567                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 568         if (status) {
 569                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 570                                                         __func__, status);
 571                 goto unlink_int_urb;
 572         }
 573
 574         dev_dbg(&port->dev, "%s - sending TI_START_PORT (2)\n", __func__);
 575         status = ti_command_out_sync(tdev, TI_START_PORT,
 576                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 577         if (status) {
 578                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 579                                                         __func__, status);
 580                 goto unlink_int_urb;
 581         }
 582
 583         /* start read urb */
 584         dev_dbg(&port->dev, "%s - start read urb\n", __func__);
 585         urb = port->read_urb;
 586         if (!urb) {
 587                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 588                 status = -EINVAL;
 589                 goto unlink_int_urb;
 590         }
 591         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 592         urb->context = tport;
 593         status = usb_submit_urb(urb, GFP_KERNEL);
 594         if (status) {
 595                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 596                                                         __func__, status);
 597                 goto unlink_int_urb;
 598         }
 599
 600         tport->tp_is_open = 1;
 601         ++tdev->td_open_port_count;
 602
 603         goto release_lock;
 604
 605 unlink_int_urb:
 606         if (tdev->td_open_port_count == 0)
 607                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 608 release_lock:
 609         mutex_unlock(&tdev->td_open_close_lock);
 610         dev_dbg(&port->dev, "%s - exit %d\n", __func__, status);
 611         return status;
 612 }
 613
 614
 615 static void ti_close(struct usb_serial_port *port)
 616 {
 617         struct ti_device *tdev;
 618         struct ti_port *tport;
 619         int port_number;
 620         int status;
 621         int do_unlock;
 622
 623         tdev = usb_get_serial_data(port->serial);
 624         tport = usb_get_serial_port_data(port);
 625         if (tdev == NULL || tport == NULL)
 626                 return;
 627
 628         tport->tp_is_open = 0;
 629
 630         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 631
 632         usb_kill_urb(port->read_urb);
 633         usb_kill_urb(port->write_urb);
 634         tport->tp_write_urb_in_use = 0;
 635
 636         port_number = port->number - port->serial->minor;
 637
 638         dev_dbg(&port->dev, "%s - sending TI_CLOSE_PORT\n", __func__);
 639         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 640                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 641         if (status)
 642                 dev_err(&port->dev,
 643                         "%s - cannot send close port command, %d\n"
 644                                                         , __func__, status);
 645
 646         /* if mutex_lock is interrupted, continue anyway */
 647         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 648         --tport->tp_tdev->td_open_port_count;
 649         if (tport->tp_tdev->td_open_port_count <= 0) {
 650                 /* last port is closed, shut down interrupt urb */
 651                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 652                 tport->tp_tdev->td_open_port_count = 0;
 653         }
 654         if (do_unlock)
 655                 mutex_unlock(&tdev->td_open_close_lock);
 656 }
 657
 658
 659 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 660                         const unsigned char *data, int count)
 661 {
 662         struct ti_port *tport = usb_get_serial_port_data(port);
 663
 664         if (count == 0) {
 665                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 666                 return 0;
 667         }
 668
 669         if (tport == NULL || !tport->tp_is_open)
 670                 return -ENODEV;
 671
 672         count = kfifo_in_locked(&tport->write_fifo, data, count,
 673                                                         &tport->tp_lock);
 674         ti_send(tport);
 675
 676         return count;
 677 }
 678
 679
 680 static int ti_write_room(struct tty_struct *tty)
 681 {
 682         struct usb_serial_port *port = tty->driver_data;
 683         struct ti_port *tport = usb_get_serial_port_data(port);
 684         int room = 0;
 685         unsigned long flags;
 686
 687         if (tport == NULL)
 688                 return 0;
 689
 690         spin_lock_irqsave(&tport->tp_lock, flags);
 691         room = kfifo_avail(&tport->write_fifo);
 692         spin_unlock_irqrestore(&tport->tp_lock, flags);
 693
 694         dev_dbg(&port->dev, "%s - returns %d\n", __func__, room);
 695         return room;
 696 }
 697
 698
 699 static int ti_chars_in_buffer(struct tty_struct *tty)
 700 {
 701         struct usb_serial_port *port = tty->driver_data;
 702         struct ti_port *tport = usb_get_serial_port_data(port);
 703         int chars = 0;
 704         unsigned long flags;
 705
 706         if (tport == NULL)
 707                 return 0;
 708
 709         spin_lock_irqsave(&tport->tp_lock, flags);
 710         chars = kfifo_len(&tport->write_fifo);
 711         spin_unlock_irqrestore(&tport->tp_lock, flags);
 712
 713         dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
 714         return chars;
 715 }
 716
 717
 718 static void ti_throttle(struct tty_struct *tty)
 719 {
 720         struct usb_serial_port *port = tty->driver_data;
 721         struct ti_port *tport = usb_get_serial_port_data(port);
 722
 723         if (tport == NULL)
 724                 return;
 725
 726         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 727                 ti_stop_read(tport, tty);
 728
 729 }
 730
 731
 732 static void ti_unthrottle(struct tty_struct *tty)
 733 {
 734         struct usb_serial_port *port = tty->driver_data;
 735         struct ti_port *tport = usb_get_serial_port_data(port);
 736         int status;
 737
 738         if (tport == NULL)
 739                 return;
 740
 741         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 742                 status = ti_restart_read(tport, tty);
 743                 if (status)
 744                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 745                                                         __func__, status);
 746         }
 747 }
 748
 749 static int ti_get_icount(struct tty_struct *tty,
 750                 struct serial_icounter_struct *icount)
 751 {
 752         struct usb_serial_port *port = tty->driver_data;
 753         struct ti_port *tport = usb_get_serial_port_data(port);
 754         struct async_icount cnow = tport->tp_icount;
 755
 756         dev_dbg(&port->dev, "%s - TIOCGICOUNT RX=%d, TX=%d\n", __func__,
 757                 cnow.rx, cnow.tx);
 758
 759         icount->cts = cnow.cts;
 760         icount->dsr = cnow.dsr;
 761         icount->rng = cnow.rng;
 762         icount->dcd = cnow.dcd;
 763         icount->rx = cnow.rx;
 764         icount->tx = cnow.tx;
 765         icount->frame = cnow.frame;
 766         icount->overrun = cnow.overrun;
 767         icount->parity = cnow.parity;
 768         icount->brk = cnow.brk;
 769         icount->buf_overrun = cnow.buf_overrun;
 770
 771         return 0;
 772 }
 773
 774 static int ti_ioctl(struct tty_struct *tty,
 775         unsigned int cmd, unsigned long arg)
 776 {
 777         struct usb_serial_port *port = tty->driver_data;
 778         struct ti_port *tport = usb_get_serial_port_data(port);
 779         struct async_icount cnow;
 780         struct async_icount cprev;
 781
 782         dev_dbg(&port->dev, "%s - cmd = 0x%04X\n", __func__, cmd);
 783
 784         if (tport == NULL)
 785                 return -ENODEV;
 786
 787         switch (cmd) {
 788         case TIOCGSERIAL:
 789                 dev_dbg(&port->dev, "%s - TIOCGSERIAL\n", __func__);
 790                 return ti_get_serial_info(tport,
 791                                 (struct serial_struct __user *)arg);
 792         case TIOCSSERIAL:
 793                 dev_dbg(&port->dev, "%s - TIOCSSERIAL\n", __func__);
 794                 return ti_set_serial_info(tty, tport,
 795                                 (struct serial_struct __user *)arg);
 796         case TIOCMIWAIT:
 797                 dev_dbg(&port->dev, "%s - TIOCMIWAIT\n", __func__);
 798                 cprev = tport->tp_icount;
 799                 while (1) {
 800                         interruptible_sleep_on(&tport->tp_msr_wait);
 801                         if (signal_pending(current))
 802                                 return -ERESTARTSYS;
 803                         cnow = tport->tp_icount;
 804                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 805                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 806                                 return -EIO; /* no change => error */
 807                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 808                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 809                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 810                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 811                                 return 0;
 812                         cprev = cnow;
 813                 }
 814                 break;
 815         }
 816         return -ENOIOCTLCMD;
 817 }
 818
 819
 820 static void ti_set_termios(struct tty_struct *tty,
 821                 struct usb_serial_port *port, struct ktermios *old_termios)
 822 {
 823         struct ti_port *tport = usb_get_serial_port_data(port);
 824         struct ti_uart_config *config;
 825         tcflag_t cflag, iflag;
 826         int baud;
 827         int status;
 828         int port_number = port->number - port->serial->minor;
 829         unsigned int mcr;
 830
 831         cflag = tty->termios->c_cflag;
 832         iflag = tty->termios->c_iflag;
 833
 834         dev_dbg(&port->dev, "%s - cflag %08x, iflag %08x\n", __func__, cflag, iflag);
 835         dev_dbg(&port->dev, "%s - old clfag %08x, old iflag %08x\n", __func__,
 836                 old_termios->c_cflag, old_termios->c_iflag);
 837
 838         if (tport == NULL)
 839                 return;
 840
 841         config = kmalloc(sizeof(*config), GFP_KERNEL);
 842         if (!config) {
 843                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 844                 return;
 845         }
 846
 847         config->wFlags = 0;
 848
 849         /* these flags must be set */
 850         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 851         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 852         config->bUartMode = (__u8)(tport->tp_uart_mode);
 853
 854         switch (cflag & CSIZE) {
 855         case CS5:
 856                     config->bDataBits = TI_UART_5_DATA_BITS;
 857                     break;
 858         case CS6:
 859                     config->bDataBits = TI_UART_6_DATA_BITS;
 860                     break;
 861         case CS7:
 862                     config->bDataBits = TI_UART_7_DATA_BITS;
 863                     break;
 864         default:
 865         case CS8:
 866                     config->bDataBits = TI_UART_8_DATA_BITS;
 867                     break;
 868         }
 869
 870         /* CMSPAR isn't supported by this driver */
 871         tty->termios->c_cflag &= ~CMSPAR;
 872
 873         if (cflag & PARENB) {
 874                 if (cflag & PARODD) {
 875                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 876                         config->bParity = TI_UART_ODD_PARITY;
 877                 } else {
 878                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 879                         config->bParity = TI_UART_EVEN_PARITY;
 880                 }
 881         } else {
 882                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 883                 config->bParity = TI_UART_NO_PARITY;
 884         }
 885
 886         if (cflag & CSTOPB)
 887                 config->bStopBits = TI_UART_2_STOP_BITS;
 888         else
 889                 config->bStopBits = TI_UART_1_STOP_BITS;
 890
 891         if (cflag & CRTSCTS) {
 892                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 893                 if ((cflag & CBAUD) != B0)
 894                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 895                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 896         } else {
 897                 tty->hw_stopped = 0;
 898                 ti_restart_read(tport, tty);
 899         }
 900
 901         if (I_IXOFF(tty) || I_IXON(tty)) {
 902                 config->cXon  = START_CHAR(tty);
 903                 config->cXoff = STOP_CHAR(tty);
 904
 905                 if (I_IXOFF(tty))
 906                         config->wFlags |= TI_UART_ENABLE_X_IN;
 907                 else
 908                         ti_restart_read(tport, tty);
 909
 910                 if (I_IXON(tty))
 911                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 912         }
 913
 914         baud = tty_get_baud_rate(tty);
 915         if (!baud)
 916                 baud = 9600;
 917         if (tport->tp_tdev->td_is_3410)
 918                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 919         else
 920                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 921
 922         /* FIXME: Should calculate resulting baud here and report it back */
 923         if ((cflag & CBAUD) != B0)
 924                 tty_encode_baud_rate(tty, baud, baud);
 925
 926         dev_dbg(&port->dev,
 927                 "%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 928                 __func__, baud, config->wBaudRate, config->wFlags,
 929                 config->bDataBits, config->bParity, config->bStopBits,
 930                 config->cXon, config->cXoff, config->bUartMode);
 931
 932         cpu_to_be16s(&config->wBaudRate);
 933         cpu_to_be16s(&config->wFlags);
 934
 935         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 936                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 937                 sizeof(*config));
 938         if (status)
 939                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 940                                         __func__, port_number, status);
 941
 942         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 943         mcr = tport->tp_shadow_mcr;
 944         /* if baud rate is B0, clear RTS and DTR */
 945         if ((cflag & CBAUD) == B0)
 946                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 947         status = ti_set_mcr(tport, mcr);
 948         if (status)
 949                 dev_err(&port->dev,
 950                         "%s - cannot set modem control on port %d, %d\n",
 951                                                 __func__, port_number, status);
 952
 953         kfree(config);
 954 }
 955
 956
 957 static int ti_tiocmget(struct tty_struct *tty)
 958 {
 959         struct usb_serial_port *port = tty->driver_data;
 960         struct ti_port *tport = usb_get_serial_port_data(port);
 961         unsigned int result;
 962         unsigned int msr;
 963         unsigned int mcr;
 964         unsigned long flags;
 965
 966         if (tport == NULL)
 967                 return -ENODEV;
 968
 969         spin_lock_irqsave(&tport->tp_lock, flags);
 970         msr = tport->tp_msr;
 971         mcr = tport->tp_shadow_mcr;
 972         spin_unlock_irqrestore(&tport->tp_lock, flags);
 973
 974         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
 975                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
 976                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
 977                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
 978                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
 979                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
 980                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
 981
 982         dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
 983
 984         return result;
 985 }
 986
 987
 988 static int ti_tiocmset(struct tty_struct *tty,
 989                                 unsigned int set, unsigned int clear)
 990 {
 991         struct usb_serial_port *port = tty->driver_data;
 992         struct ti_port *tport = usb_get_serial_port_data(port);
 993         unsigned int mcr;
 994         unsigned long flags;
 995
 996         if (tport == NULL)
 997                 return -ENODEV;
 998
 999         spin_lock_irqsave(&tport->tp_lock, flags);
1000         mcr = tport->tp_shadow_mcr;
1001
1002         if (set & TIOCM_RTS)
1003                 mcr |= TI_MCR_RTS;
1004         if (set & TIOCM_DTR)
1005                 mcr |= TI_MCR_DTR;
1006         if (set & TIOCM_LOOP)
1007                 mcr |= TI_MCR_LOOP;
1008
1009         if (clear & TIOCM_RTS)
1010                 mcr &= ~TI_MCR_RTS;
1011         if (clear & TIOCM_DTR)
1012                 mcr &= ~TI_MCR_DTR;
1013         if (clear & TIOCM_LOOP)
1014                 mcr &= ~TI_MCR_LOOP;
1015         spin_unlock_irqrestore(&tport->tp_lock, flags);
1016
1017         return ti_set_mcr(tport, mcr);
1018 }
1019
1020
1021 static void ti_break(struct tty_struct *tty, int break_state)
1022 {
1023         struct usb_serial_port *port = tty->driver_data;
1024         struct ti_port *tport = usb_get_serial_port_data(port);
1025         int status;
1026
1027         dev_dbg(&port->dev, "%s - state = %d\n", __func__, break_state);
1028
1029         if (tport == NULL)
1030                 return;
1031
1032         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1033
1034         status = ti_write_byte(port, tport->tp_tdev,
1035                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1036                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1037
1038         if (status)
1039                 dev_dbg(&port->dev, "%s - error setting break, %d\n", __func__, status);
1040 }
1041
1042
1043 static void ti_interrupt_callback(struct urb *urb)
1044 {
1045         struct ti_device *tdev = urb->context;
1046         struct usb_serial_port *port;
1047         struct usb_serial *serial = tdev->td_serial;
1048         struct ti_port *tport;
1049         struct device *dev = &urb->dev->dev;
1050         unsigned char *data = urb->transfer_buffer;
1051         int length = urb->actual_length;
1052         int port_number;
1053         int function;
1054         int status = urb->status;
1055         int retval;
1056         __u8 msr;
1057
1058         switch (status) {
1059         case 0:
1060                 break;
1061         case -ECONNRESET:
1062         case -ENOENT:
1063         case -ESHUTDOWN:
1064                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1065                 tdev->td_urb_error = 1;
1066                 return;
1067         default:
1068                 dev_err(dev, "%s - nonzero urb status, %d\n", __func__, status);
1069                 tdev->td_urb_error = 1;
1070                 goto exit;
1071         }
1072
1073         if (length != 2) {
1074                 dev_dbg(dev, "%s - bad packet size, %d\n", __func__, length);
1075                 goto exit;
1076         }
1077
1078         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1079                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1080                 goto exit;
1081         }
1082
1083         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1084         function = TI_GET_FUNC_FROM_CODE(data[0]);
1085
1086         dev_dbg(dev, "%s - port_number %d, function %d, data 0x%02X\n",
1087                 __func__, port_number, function, data[1]);
1088
1089         if (port_number >= serial->num_ports) {
1090                 dev_err(dev, "%s - bad port number, %d\n",
1091                                                 __func__, port_number);
1092                 goto exit;
1093         }
1094
1095         port = serial->port[port_number];
1096
1097         tport = usb_get_serial_port_data(port);
1098         if (!tport)
1099                 goto exit;
1100
1101         switch (function) {
1102         case TI_CODE_DATA_ERROR:
1103                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1104                         __func__, port_number, data[1]);
1105                 break;
1106
1107         case TI_CODE_MODEM_STATUS:
1108                 msr = data[1];
1109                 dev_dbg(dev, "%s - port %d, msr 0x%02X\n", __func__, port_number, msr);
1110                 ti_handle_new_msr(tport, msr);
1111                 break;
1112
1113         default:
1114                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1115                                                         __func__, data[1]);
1116                 break;
1117         }
1118
1119 exit:
1120         retval = usb_submit_urb(urb, GFP_ATOMIC);
1121         if (retval)
1122                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1123                         __func__, retval);
1124 }
1125
1126
1127 static void ti_bulk_in_callback(struct urb *urb)
1128 {
1129         struct ti_port *tport = urb->context;
1130         struct usb_serial_port *port = tport->tp_port;
1131         struct device *dev = &urb->dev->dev;
1132         int status = urb->status;
1133         int retval = 0;
1134         struct tty_struct *tty;
1135
1136         switch (status) {
1137         case 0:
1138                 break;
1139         case -ECONNRESET:
1140         case -ENOENT:
1141         case -ESHUTDOWN:
1142                 dev_dbg(dev, "%s - urb shutting down, %d\n", __func__, status);
1143                 tport->tp_tdev->td_urb_error = 1;
1144                 wake_up_interruptible(&tport->tp_write_wait);
1145                 return;
1146         default:
1147                 dev_err(dev, "%s - nonzero urb status, %d\n",
1148                         __func__, status);
1149                 tport->tp_tdev->td_urb_error = 1;
1150                 wake_up_interruptible(&tport->tp_write_wait);
1151         }
1152
1153         if (status == -EPIPE)
1154                 goto exit;
1155
1156         if (status) {
1157                 dev_err(dev, "%s - stopping read!\n", __func__);
1158                 return;
1159         }
1160
1161         tty = tty_port_tty_get(&port->port);
1162         if (tty) {
1163                 if (urb->actual_length) {
1164                         usb_serial_debug_data(dev, __func__, urb->actual_length,
1165                                               urb->transfer_buffer);
1166
1167                         if (!tport->tp_is_open)
1168                                 dev_dbg(dev, "%s - port closed, dropping data\n",
1169                                         __func__);
1170                         else
1171                                 ti_recv(&urb->dev->dev, tty,
1172                                                 urb->transfer_buffer,
1173                                                 urb->actual_length);
1174                         spin_lock(&tport->tp_lock);
1175                         tport->tp_icount.rx += urb->actual_length;
1176                         spin_unlock(&tport->tp_lock);
1177                 }
1178                 tty_kref_put(tty);
1179         }
1180
1181 exit:
1182         /* continue to read unless stopping */
1183         spin_lock(&tport->tp_lock);
1184         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1185                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1186         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1187                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1188
1189         spin_unlock(&tport->tp_lock);
1190         if (retval)
1191                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1192                         __func__, retval);
1193 }
1194
1195
1196 static void ti_bulk_out_callback(struct urb *urb)
1197 {
1198         struct ti_port *tport = urb->context;
1199         struct usb_serial_port *port = tport->tp_port;
1200         int status = urb->status;
1201
1202         tport->tp_write_urb_in_use = 0;
1203
1204         switch (status) {
1205         case 0:
1206                 break;
1207         case -ECONNRESET:
1208         case -ENOENT:
1209         case -ESHUTDOWN:
1210                 dev_dbg(&port->dev, "%s - urb shutting down, %d\n", __func__, status);
1211                 tport->tp_tdev->td_urb_error = 1;
1212                 wake_up_interruptible(&tport->tp_write_wait);
1213                 return;
1214         default:
1215                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1216                         __func__, status);
1217                 tport->tp_tdev->td_urb_error = 1;
1218                 wake_up_interruptible(&tport->tp_write_wait);
1219         }
1220
1221         /* send any buffered data */
1222         ti_send(tport);
1223 }
1224
1225
1226 static void ti_recv(struct device *dev, struct tty_struct *tty,
1227         unsigned char *data, int length)
1228 {
1229         int cnt;
1230
1231         do {
1232                 cnt = tty_insert_flip_string(tty, data, length);
1233                 if (cnt < length) {
1234                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1235                                                 __func__, length - cnt);
1236                         if (cnt == 0)
1237                                 break;
1238                 }
1239                 tty_flip_buffer_push(tty);
1240                 data += cnt;
1241                 length -= cnt;
1242         } while (length > 0);
1243
1244 }
1245
1246
1247 static void ti_send(struct ti_port *tport)
1248 {
1249         int count, result;
1250         struct usb_serial_port *port = tport->tp_port;
1251         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1252         unsigned long flags;
1253
1254         spin_lock_irqsave(&tport->tp_lock, flags);
1255
1256         if (tport->tp_write_urb_in_use)
1257                 goto unlock;
1258
1259         count = kfifo_out(&tport->write_fifo,
1260                                 port->write_urb->transfer_buffer,
1261                                 port->bulk_out_size);
1262
1263         if (count == 0)
1264                 goto unlock;
1265
1266         tport->tp_write_urb_in_use = 1;
1267
1268         spin_unlock_irqrestore(&tport->tp_lock, flags);
1269
1270         usb_serial_debug_data(&port->dev, __func__, count,
1271                               port->write_urb->transfer_buffer);
1272
1273         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1274                            usb_sndbulkpipe(port->serial->dev,
1275                                             port->bulk_out_endpointAddress),
1276                            port->write_urb->transfer_buffer, count,
1277                            ti_bulk_out_callback, tport);
1278
1279         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1280         if (result) {
1281                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1282                                                         __func__, result);
1283                 tport->tp_write_urb_in_use = 0;
1284                 /* TODO: reschedule ti_send */
1285         } else {
1286                 spin_lock_irqsave(&tport->tp_lock, flags);
1287                 tport->tp_icount.tx += count;
1288                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1289         }
1290
1291         /* more room in the buffer for new writes, wakeup */
1292         if (tty)
1293                 tty_wakeup(tty);
1294         tty_kref_put(tty);
1295         wake_up_interruptible(&tport->tp_write_wait);
1296         return;
1297 unlock:
1298         spin_unlock_irqrestore(&tport->tp_lock, flags);
1299         tty_kref_put(tty);
1300         return;
1301 }
1302
1303
1304 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1305 {
1306         unsigned long flags;
1307         int status;
1308
1309         status = ti_write_byte(tport->tp_port, tport->tp_tdev,
1310                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1311                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1312
1313         spin_lock_irqsave(&tport->tp_lock, flags);
1314         if (!status)
1315                 tport->tp_shadow_mcr = mcr;
1316         spin_unlock_irqrestore(&tport->tp_lock, flags);
1317
1318         return status;
1319 }
1320
1321
1322 static int ti_get_lsr(struct ti_port *tport)
1323 {
1324         int size, status;
1325         struct ti_device *tdev = tport->tp_tdev;
1326         struct usb_serial_port *port = tport->tp_port;
1327         int port_number = port->number - port->serial->minor;
1328         struct ti_port_status *data;
1329
1330         size = sizeof(struct ti_port_status);
1331         data = kmalloc(size, GFP_KERNEL);
1332         if (!data) {
1333                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1334                 return -ENOMEM;
1335         }
1336
1337         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1338                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1339         if (status) {
1340                 dev_err(&port->dev,
1341                         "%s - get port status command failed, %d\n",
1342                                                         __func__, status);
1343                 goto free_data;
1344         }
1345
1346         dev_dbg(&port->dev, "%s - lsr 0x%02X\n", __func__, data->bLSR);
1347
1348         tport->tp_lsr = data->bLSR;
1349
1350 free_data:
1351         kfree(data);
1352         return status;
1353 }
1354
1355
1356 static int ti_get_serial_info(struct ti_port *tport,
1357         struct serial_struct __user *ret_arg)
1358 {
1359         struct usb_serial_port *port = tport->tp_port;
1360         struct serial_struct ret_serial;
1361
1362         if (!ret_arg)
1363                 return -EFAULT;
1364
1365         memset(&ret_serial, 0, sizeof(ret_serial));
1366
1367         ret_serial.type = PORT_16550A;
1368         ret_serial.line = port->serial->minor;
1369         ret_serial.port = port->number - port->serial->minor;
1370         ret_serial.flags = tport->tp_flags;
1371         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1372         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1373         ret_serial.closing_wait = tport->tp_closing_wait;
1374
1375         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1376                 return -EFAULT;
1377
1378         return 0;
1379 }
1380
1381
1382 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1383         struct serial_struct __user *new_arg)
1384 {
1385         struct serial_struct new_serial;
1386
1387         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1388                 return -EFAULT;
1389
1390         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1391         tport->tp_closing_wait = new_serial.closing_wait;
1392
1393         return 0;
1394 }
1395
1396
1397 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1398 {
1399         struct async_icount *icount;
1400         struct tty_struct *tty;
1401         unsigned long flags;
1402
1403         dev_dbg(&tport->tp_port->dev, "%s - msr 0x%02X\n", __func__, msr);
1404
1405         if (msr & TI_MSR_DELTA_MASK) {
1406                 spin_lock_irqsave(&tport->tp_lock, flags);
1407                 icount = &tport->tp_icount;
1408                 if (msr & TI_MSR_DELTA_CTS)
1409                         icount->cts++;
1410                 if (msr & TI_MSR_DELTA_DSR)
1411                         icount->dsr++;
1412                 if (msr & TI_MSR_DELTA_CD)
1413                         icount->dcd++;
1414                 if (msr & TI_MSR_DELTA_RI)
1415                         icount->rng++;
1416                 wake_up_interruptible(&tport->tp_msr_wait);
1417                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1418         }
1419
1420         tport->tp_msr = msr & TI_MSR_MASK;
1421
1422         /* handle CTS flow control */
1423         tty = tty_port_tty_get(&tport->tp_port->port);
1424         if (tty && C_CRTSCTS(tty)) {
1425                 if (msr & TI_MSR_CTS) {
1426                         tty->hw_stopped = 0;
1427                         tty_wakeup(tty);
1428                 } else {
1429                         tty->hw_stopped = 1;
1430                 }
1431         }
1432         tty_kref_put(tty);
1433 }
1434
1435
1436 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1437 {
1438         struct ti_device *tdev = tport->tp_tdev;
1439         struct usb_serial_port *port = tport->tp_port;
1440         wait_queue_t wait;
1441
1442         spin_lock_irq(&tport->tp_lock);
1443
1444         /* wait for data to drain from the buffer */
1445         tdev->td_urb_error = 0;
1446         init_waitqueue_entry(&wait, current);
1447         add_wait_queue(&tport->tp_write_wait, &wait);
1448         for (;;) {
1449                 set_current_state(TASK_INTERRUPTIBLE);
1450                 if (kfifo_len(&tport->write_fifo) == 0
1451                 || timeout == 0 || signal_pending(current)
1452                 || tdev->td_urb_error
1453                 || port->serial->disconnected)  /* disconnect */
1454                         break;
1455                 spin_unlock_irq(&tport->tp_lock);
1456                 timeout = schedule_timeout(timeout);
1457                 spin_lock_irq(&tport->tp_lock);
1458         }
1459         set_current_state(TASK_RUNNING);
1460         remove_wait_queue(&tport->tp_write_wait, &wait);
1461
1462         /* flush any remaining data in the buffer */
1463         if (flush)
1464                 kfifo_reset_out(&tport->write_fifo);
1465
1466         spin_unlock_irq(&tport->tp_lock);
1467
1468         mutex_lock(&port->serial->disc_mutex);
1469         /* wait for data to drain from the device */
1470         /* wait for empty tx register, plus 20 ms */
1471         timeout += jiffies;
1472         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1473         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1474         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1475         && !port->serial->disconnected) {
1476                 if (ti_get_lsr(tport))
1477                         break;
1478                 mutex_unlock(&port->serial->disc_mutex);
1479                 msleep_interruptible(20);
1480                 mutex_lock(&port->serial->disc_mutex);
1481         }
1482         mutex_unlock(&port->serial->disc_mutex);
1483 }
1484
1485
1486 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1487 {
1488         unsigned long flags;
1489
1490         spin_lock_irqsave(&tport->tp_lock, flags);
1491
1492         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1493                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1494
1495         spin_unlock_irqrestore(&tport->tp_lock, flags);
1496 }
1497
1498
1499 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1500 {
1501         struct urb *urb;
1502         int status = 0;
1503         unsigned long flags;
1504
1505         spin_lock_irqsave(&tport->tp_lock, flags);
1506
1507         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1508                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1509                 urb = tport->tp_port->read_urb;
1510                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1511                 urb->context = tport;
1512                 status = usb_submit_urb(urb, GFP_KERNEL);
1513         } else  {
1514                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1515                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1516         }
1517
1518         return status;
1519 }
1520
1521
1522 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1523         __u16 moduleid, __u16 value, __u8 *data, int size)
1524 {
1525         int status;
1526
1527         status = usb_control_msg(tdev->td_serial->dev,
1528                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1529                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1530                 value, moduleid, data, size, 1000);
1531
1532         if (status == size)
1533                 status = 0;
1534
1535         if (status > 0)
1536                 status = -ECOMM;
1537
1538         return status;
1539 }
1540
1541
1542 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1543         __u16 moduleid, __u16 value, __u8 *data, int size)
1544 {
1545         int status;
1546
1547         status = usb_control_msg(tdev->td_serial->dev,
1548                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1549                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1550                 value, moduleid, data, size, 1000);
1551
1552         if (status == size)
1553                 status = 0;
1554
1555         if (status > 0)
1556                 status = -ECOMM;
1557
1558         return status;
1559 }
1560
1561
1562 static int ti_write_byte(struct usb_serial_port *port,
1563                         struct ti_device *tdev, unsigned long addr,
1564                         __u8 mask, __u8 byte)
1565 {
1566         int status;
1567         unsigned int size;
1568         struct ti_write_data_bytes *data;
1569
1570         dev_dbg(&port->dev, "%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X\n", __func__,
1571                 addr, mask, byte);
1572
1573         size = sizeof(struct ti_write_data_bytes) + 2;
1574         data = kmalloc(size, GFP_KERNEL);
1575         if (!data) {
1576                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1577                 return -ENOMEM;
1578         }
1579
1580         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1581         data->bDataType = TI_RW_DATA_BYTE;
1582         data->bDataCounter = 1;
1583         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1584         data->wBaseAddrLo = cpu_to_be16(addr);
1585         data->bData[0] = mask;
1586         data->bData[1] = byte;
1587
1588         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1589                 (__u8 *)data, size);
1590
1591         if (status < 0)
1592                 dev_err(&port->dev, "%s - failed, %d\n", __func__, status);
1593
1594         kfree(data);
1595
1596         return status;
1597 }
1598
1599 static int ti_do_download(struct usb_device *dev, int pipe,
1600                                                 u8 *buffer, int size)
1601 {
1602         int pos;
1603         u8 cs = 0;
1604         int done;
1605         struct ti_firmware_header *header;
1606         int status = 0;
1607         int len;
1608
1609         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1610                 cs = (__u8)(cs + buffer[pos]);
1611
1612         header = (struct ti_firmware_header *)buffer;
1613         header->wLength = cpu_to_le16((__u16)(size
1614                                         - sizeof(struct ti_firmware_header)));
1615         header->bCheckSum = cs;
1616
1617         dev_dbg(&dev->dev, "%s - downloading firmware\n", __func__);
1618         for (pos = 0; pos < size; pos += done) {
1619                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1620                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1621                                                                 &done, 1000);
1622                 if (status)
1623                         break;
1624         }
1625         return status;
1626 }
1627
1628 static int ti_download_firmware(struct ti_device *tdev)
1629 {
1630         int status;
1631         int buffer_size;
1632         __u8 *buffer;
1633         struct usb_device *dev = tdev->td_serial->dev;
1634         unsigned int pipe = usb_sndbulkpipe(dev,
1635                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1636         const struct firmware *fw_p;
1637         char buf[32];
1638
1639         /* try ID specific firmware first, then try generic firmware */
1640         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1641             dev->descriptor.idProduct);
1642         status = request_firmware(&fw_p, buf, &dev->dev);
1643
1644         if (status != 0) {
1645                 buf[0] = '\0';
1646                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1647                         switch (dev->descriptor.idProduct) {
1648                         case MTS_CDMA_PRODUCT_ID:
1649                                 strcpy(buf, "mts_cdma.fw");
1650                                 break;
1651                         case MTS_GSM_PRODUCT_ID:
1652                                 strcpy(buf, "mts_gsm.fw");
1653                                 break;
1654                         case MTS_EDGE_PRODUCT_ID:
1655                                 strcpy(buf, "mts_edge.fw");
1656                                 break;
1657                         case MTS_MT9234MU_PRODUCT_ID:
1658                                 strcpy(buf, "mts_mt9234mu.fw");
1659                                 break;
1660                         case MTS_MT9234ZBA_PRODUCT_ID:
1661                                 strcpy(buf, "mts_mt9234zba.fw");
1662                                 break;
1663                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1664                                 strcpy(buf, "mts_mt9234zba.fw");
1665                                 break;                  }
1666                 }
1667                 if (buf[0] == '\0') {
1668                         if (tdev->td_is_3410)
1669                                 strcpy(buf, "ti_3410.fw");
1670                         else
1671                                 strcpy(buf, "ti_5052.fw");
1672                 }
1673                 status = request_firmware(&fw_p, buf, &dev->dev);
1674         }
1675         if (status) {
1676                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1677                 return -ENOENT;
1678         }
1679         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1680                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1681                 release_firmware(fw_p);
1682                 return -ENOENT;
1683         }
1684
1685         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1686         buffer = kmalloc(buffer_size, GFP_KERNEL);
1687         if (buffer) {
1688                 memcpy(buffer, fw_p->data, fw_p->size);
1689                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1690                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1691                 kfree(buffer);
1692         } else {
1693                 dev_dbg(&dev->dev, "%s ENOMEM\n", __func__);
1694                 status = -ENOMEM;
1695         }
1696         release_firmware(fw_p);
1697         if (status) {
1698                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1699                                                         __func__, status);
1700                 return status;
1701         }
1702
1703         dev_dbg(&dev->dev, "%s - download successful\n", __func__);
1704
1705         return 0;
1706 }