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  * This driver needs this hotplug script in /etc/hotplug/usb/ti_usb_3410_5052
  21  * or in /etc/hotplug.d/usb/ti_usb_3410_5052.hotplug to set the device
  22  * configuration.
  23  *
  24  * #!/bin/bash
  25  *
  26  * BOOT_CONFIG=1
  27  * ACTIVE_CONFIG=2
  28  *
  29  * if [[ "$ACTION" != "add" ]]
  30  * then
  31  *      exit
  32  * fi
  33  *
  34  * CONFIG_PATH=/sys${DEVPATH%/?*}/bConfigurationValue
  35  *
  36  * if [[ 0`cat $CONFIG_PATH` -ne $BOOT_CONFIG ]]
  37  * then
  38  *      exit
  39  * fi
  40  *
  41  * PRODUCT=${PRODUCT%/?*}               # delete version
  42  * VENDOR_ID=`printf "%d" 0x${PRODUCT%/?*}`
  43  * PRODUCT_ID=`printf "%d" 0x${PRODUCT#*?/}`
  44  *
  45  * PARAM_PATH=/sys/module/ti_usb_3410_5052/parameters
  46  *
  47  * function scan() {
  48  *      s=$1
  49  *      shift
  50  *      for i
  51  *      do
  52  *              if [[ $s -eq $i ]]
  53  *              then
  54  *                      return 0
  55  *              fi
  56  *      done
  57  *      return 1
  58  * }
  59  *
  60  * IFS=$IFS,
  61  *
  62  * if (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_3410` &&
  63  * scan $PRODUCT_ID 13328 `cat $PARAM_PATH/product_3410`) ||
  64  * (scan $VENDOR_ID 1105 `cat $PARAM_PATH/vendor_5052` &&
  65  * scan $PRODUCT_ID 20562 20818 20570 20575 `cat $PARAM_PATH/product_5052`)
  66  * then
  67  *      echo $ACTIVE_CONFIG > $CONFIG_PATH
  68  * fi
  69  */
  70
  71 #include <linux/config.h>
  72 #include <linux/kernel.h>
  73 #include <linux/errno.h>
  74 #include <linux/init.h>
  75 #include <linux/slab.h>
  76 #include <linux/tty.h>
  77 #include <linux/tty_driver.h>
  78 #include <linux/tty_flip.h>
  79 #include <linux/module.h>
  80 #include <linux/spinlock.h>
  81 #include <linux/ioctl.h>
  82 #include <linux/serial.h>
  83 #include <linux/circ_buf.h>
  84 #include <asm/uaccess.h>
  85 #include <asm/semaphore.h>
  86 #include <linux/usb.h>
  87
  88 #include "usb-serial.h"
  89 #include "ti_usb_3410_5052.h"
  90 #include "ti_fw_3410.h"         /* firmware image for 3410 */
  91 #include "ti_fw_5052.h"         /* firmware image for 5052 */
  92
  93
  94 /* Defines */
  95
  96 #define TI_DRIVER_VERSION       "v0.9"
  97 #define TI_DRIVER_AUTHOR        "Al Borchers <alborchers@steinerpoint.com>"
  98 #define TI_DRIVER_DESC          "TI USB 3410/5052 Serial Driver"
  99
 100 #define TI_FIRMWARE_BUF_SIZE    16284
 101
 102 #define TI_WRITE_BUF_SIZE       1024
 103
 104 #define TI_TRANSFER_TIMEOUT     2
 105
 106 #define TI_DEFAULT_LOW_LATENCY  0
 107 #define TI_DEFAULT_CLOSING_WAIT 4000            /* in .01 secs */
 108
 109 /* supported setserial flags */
 110 #define TI_SET_SERIAL_FLAGS     (ASYNC_LOW_LATENCY)
 111
 112 /* read urb states */
 113 #define TI_READ_URB_RUNNING     0
 114 #define TI_READ_URB_STOPPING    1
 115 #define TI_READ_URB_STOPPED     2
 116
 117 #define TI_EXTRA_VID_PID_COUNT  5
 118
 119
 120 /* Structures */
 121
 122 struct ti_port {
 123         int                     tp_is_open;
 124         __u8                    tp_msr;
 125         __u8                    tp_lsr;
 126         __u8                    tp_shadow_mcr;
 127         __u8                    tp_uart_mode;   /* 232 or 485 modes */
 128         unsigned int            tp_uart_base_addr;
 129         int                     tp_flags;
 130         int                     tp_closing_wait;/* in .01 secs */
 131         struct async_icount     tp_icount;
 132         wait_queue_head_t       tp_msr_wait;    /* wait for msr change */
 133         wait_queue_head_t       tp_write_wait;
 134         struct ti_device        *tp_tdev;
 135         struct usb_serial_port  *tp_port;
 136         spinlock_t              tp_lock;
 137         int                     tp_read_urb_state;
 138         int                     tp_write_urb_in_use;
 139         struct circ_buf         *tp_write_buf;
 140 };
 141
 142 struct ti_device {
 143         struct semaphore        td_open_close_sem;
 144         int                     td_open_port_count;
 145         struct usb_serial       *td_serial;
 146         int                     td_is_3410;
 147         int                     td_urb_error;
 148 };
 149
 150
 151 /* Function Declarations */
 152
 153 static int ti_startup(struct usb_serial *serial);
 154 static void ti_shutdown(struct usb_serial *serial);
 155 static int ti_open(struct usb_serial_port *port, struct file *file);
 156 static void ti_close(struct usb_serial_port *port, struct file *file);
 157 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
 158         int count);
 159 static int ti_write_room(struct usb_serial_port *port);
 160 static int ti_chars_in_buffer(struct usb_serial_port *port);
 161 static void ti_throttle(struct usb_serial_port *port);
 162 static void ti_unthrottle(struct usb_serial_port *port);
 163 static int ti_ioctl(struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg);
 164 static void ti_set_termios(struct usb_serial_port *port,
 165         struct termios *old_termios);
 166 static int ti_tiocmget(struct usb_serial_port *port, struct file *file);
 167 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
 168         unsigned int set, unsigned int clear);
 169 static void ti_break(struct usb_serial_port *port, int break_state);
 170 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs);
 171 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs);
 172 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs);
 173
 174 static void ti_recv(struct device *dev, struct tty_struct *tty,
 175         unsigned char *data, int length);
 176 static void ti_send(struct ti_port *tport);
 177 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr);
 178 static int ti_get_lsr(struct ti_port *tport);
 179 static int ti_get_serial_info(struct ti_port *tport,
 180         struct serial_struct __user *ret_arg);
 181 static int ti_set_serial_info(struct ti_port *tport,
 182         struct serial_struct __user *new_arg);
 183 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr);
 184
 185 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush);
 186
 187 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty);
 188 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty);
 189
 190 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
 191         __u16 moduleid, __u16 value, __u8 *data, int size);
 192 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
 193         __u16 moduleid, __u16 value, __u8 *data, int size);
 194
 195 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
 196         __u8 mask, __u8 byte);
 197
 198 static int ti_download_firmware(struct ti_device *tdev,
 199         unsigned char *firmware, unsigned int firmware_size);
 200
 201 /* circular buffer */
 202 static struct circ_buf *ti_buf_alloc(void);
 203 static void ti_buf_free(struct circ_buf *cb);
 204 static void ti_buf_clear(struct circ_buf *cb);
 205 static int ti_buf_data_avail(struct circ_buf *cb);
 206 static int ti_buf_space_avail(struct circ_buf *cb);
 207 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count);
 208 static int ti_buf_get(struct circ_buf *cb, char *buf, int count);
 209
 210
 211 /* Data */
 212
 213 /* module parameters */
 214 static int debug;
 215 static int low_latency = TI_DEFAULT_LOW_LATENCY;
 216 static int closing_wait = TI_DEFAULT_CLOSING_WAIT;
 217 static ushort vendor_3410[TI_EXTRA_VID_PID_COUNT];
 218 static int vendor_3410_count;
 219 static ushort product_3410[TI_EXTRA_VID_PID_COUNT];
 220 static int product_3410_count;
 221 static ushort vendor_5052[TI_EXTRA_VID_PID_COUNT];
 222 static int vendor_5052_count;
 223 static ushort product_5052[TI_EXTRA_VID_PID_COUNT];
 224 static int product_5052_count;
 225
 226 /* supported devices */
 227 /* the array dimension is the number of default entries plus */
 228 /* TI_EXTRA_VID_PID_COUNT user defined entries plus 1 terminating */
 229 /* null entry */
 230 static struct usb_device_id ti_id_table_3410[1+TI_EXTRA_VID_PID_COUNT+1] = {
 231         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 232 };
 233
 234 static struct usb_device_id ti_id_table_5052[4+TI_EXTRA_VID_PID_COUNT+1] = {
 235         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 236         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 237         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 238         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 239 };
 240
 241 static struct usb_device_id ti_id_table_combined[] = {
 242         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 243         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 244         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 245         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 246         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 247         { }
 248 };
 249
 250 static struct usb_driver ti_usb_driver = {
 251         .name                   = "ti_usb_3410_5052",
 252         .probe                  = usb_serial_probe,
 253         .disconnect             = usb_serial_disconnect,
 254         .id_table               = ti_id_table_combined,
 255         .no_dynamic_id =        1,
 256 };
 257
 258 static struct usb_serial_driver ti_1port_device = {
 259         .driver = {
 260                 .owner          = THIS_MODULE,
 261                 .name           = "ti_usb_3410_5052_1",
 262         },
 263         .description            = "TI USB 3410 1 port adapter",
 264         .id_table               = ti_id_table_3410,
 265         .num_interrupt_in       = 1,
 266         .num_bulk_in            = 1,
 267         .num_bulk_out           = 1,
 268         .num_ports              = 1,
 269         .attach                 = ti_startup,
 270         .shutdown               = ti_shutdown,
 271         .open                   = ti_open,
 272         .close                  = ti_close,
 273         .write                  = ti_write,
 274         .write_room             = ti_write_room,
 275         .chars_in_buffer        = ti_chars_in_buffer,
 276         .throttle               = ti_throttle,
 277         .unthrottle             = ti_unthrottle,
 278         .ioctl                  = ti_ioctl,
 279         .set_termios            = ti_set_termios,
 280         .tiocmget               = ti_tiocmget,
 281         .tiocmset               = ti_tiocmset,
 282         .break_ctl              = ti_break,
 283         .read_int_callback      = ti_interrupt_callback,
 284         .read_bulk_callback     = ti_bulk_in_callback,
 285         .write_bulk_callback    = ti_bulk_out_callback,
 286 };
 287
 288 static struct usb_serial_driver ti_2port_device = {
 289         .driver = {
 290                 .owner          = THIS_MODULE,
 291                 .name           = "ti_usb_3410_5052_2",
 292         },
 293         .description            = "TI USB 5052 2 port adapter",
 294         .id_table               = ti_id_table_5052,
 295         .num_interrupt_in       = 1,
 296         .num_bulk_in            = 2,
 297         .num_bulk_out           = 2,
 298         .num_ports              = 2,
 299         .attach                 = ti_startup,
 300         .shutdown               = ti_shutdown,
 301         .open                   = ti_open,
 302         .close                  = ti_close,
 303         .write                  = ti_write,
 304         .write_room             = ti_write_room,
 305         .chars_in_buffer        = ti_chars_in_buffer,
 306         .throttle               = ti_throttle,
 307         .unthrottle             = ti_unthrottle,
 308         .ioctl                  = ti_ioctl,
 309         .set_termios            = ti_set_termios,
 310         .tiocmget               = ti_tiocmget,
 311         .tiocmset               = ti_tiocmset,
 312         .break_ctl              = ti_break,
 313         .read_int_callback      = ti_interrupt_callback,
 314         .read_bulk_callback     = ti_bulk_in_callback,
 315         .write_bulk_callback    = ti_bulk_out_callback,
 316 };
 317
 318
 319 /* Module */
 320
 321 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 322 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 323 MODULE_VERSION(TI_DRIVER_VERSION);
 324 MODULE_LICENSE("GPL");
 325
 326 module_param(debug, bool, S_IRUGO | S_IWUSR);
 327 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 328
 329 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
 330 MODULE_PARM_DESC(low_latency, "TTY low_latency flag, 0=off, 1=on, default is off");
 331
 332 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 333 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 334
 335 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 336 MODULE_PARM_DESC(vendor_3410, "Vendor ids for 3410 based devices, 1-5 short integers");
 337 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 338 MODULE_PARM_DESC(product_3410, "Product ids for 3410 based devices, 1-5 short integers");
 339 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 340 MODULE_PARM_DESC(vendor_5052, "Vendor ids for 5052 based devices, 1-5 short integers");
 341 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 342 MODULE_PARM_DESC(product_5052, "Product ids for 5052 based devices, 1-5 short integers");
 343
 344 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 345
 346
 347 /* Functions */
 348
 349 static int __init ti_init(void)
 350 {
 351         int i,j;
 352         int ret;
 353
 354         /* insert extra vendor and product ids */
 355         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 356         for (i=0; i<min(vendor_3410_count,product_3410_count); i++,j++) {
 357                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 358                 ti_id_table_3410[j].idProduct = product_3410[i];
 359                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 360         }
 361         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 362         for (i=0; i<min(vendor_5052_count,product_5052_count); i++,j++) {
 363                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 364                 ti_id_table_5052[j].idProduct = product_5052[i];
 365                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 366         }
 367
 368         ret = usb_serial_register(&ti_1port_device);
 369         if (ret)
 370                 goto failed_1port;
 371         ret = usb_serial_register(&ti_2port_device);
 372         if (ret)
 373                 goto failed_2port;
 374
 375         ret = usb_register(&ti_usb_driver);
 376         if (ret)
 377                 goto failed_usb;
 378
 379         info(TI_DRIVER_DESC " " TI_DRIVER_VERSION);
 380
 381         return 0;
 382
 383 failed_usb:
 384         usb_serial_deregister(&ti_2port_device);
 385 failed_2port:
 386         usb_serial_deregister(&ti_1port_device);
 387 failed_1port:
 388         return ret;
 389 }
 390
 391
 392 static void __exit ti_exit(void)
 393 {
 394         usb_serial_deregister(&ti_1port_device);
 395         usb_serial_deregister(&ti_2port_device);
 396         usb_deregister(&ti_usb_driver);
 397 }
 398
 399
 400 module_init(ti_init);
 401 module_exit(ti_exit);
 402
 403
 404 static int ti_startup(struct usb_serial *serial)
 405 {
 406         struct ti_device *tdev;
 407         struct ti_port *tport;
 408         struct usb_device *dev = serial->dev;
 409         int status;
 410         int i;
 411
 412
 413         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 414             __FUNCTION__, le16_to_cpu(dev->descriptor.idProduct),
 415             dev->descriptor.bNumConfigurations,
 416             dev->actconfig->desc.bConfigurationValue);
 417
 418         /* create device structure */
 419         tdev = kmalloc(sizeof(struct ti_device), GFP_KERNEL);
 420         if (tdev == NULL) {
 421                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
 422                 return -ENOMEM;
 423         }
 424         memset(tdev, 0, sizeof(struct ti_device));
 425         sema_init(&tdev->td_open_close_sem, 1);
 426         tdev->td_serial = serial;
 427         usb_set_serial_data(serial, tdev);
 428
 429         /* determine device type */
 430         if (usb_match_id(serial->interface, ti_id_table_3410))
 431                 tdev->td_is_3410 = 1;
 432         dbg("%s - device type is %s", __FUNCTION__, tdev->td_is_3410 ? "3410" : "5052");
 433
 434         /* if we have only 1 configuration, download firmware */
 435         if (dev->descriptor.bNumConfigurations == 1) {
 436
 437                 if (tdev->td_is_3410)
 438                         status = ti_download_firmware(tdev, ti_fw_3410,
 439                                 sizeof(ti_fw_3410));
 440                 else
 441                         status = ti_download_firmware(tdev, ti_fw_5052,
 442                                 sizeof(ti_fw_5052));
 443                 if (status)
 444                         goto free_tdev;
 445
 446                 /* 3410 must be reset, 5052 resets itself */
 447                 if (tdev->td_is_3410) {
 448                         msleep_interruptible(100);
 449                         usb_reset_device(dev);
 450                 }
 451
 452                 status = -ENODEV;
 453                 goto free_tdev;
 454         }
 455
 456         /* the second configuration must be set (in sysfs by hotplug script) */
 457         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 458                 status = -ENODEV;
 459                 goto free_tdev;
 460         }
 461
 462         /* set up port structures */
 463         for (i = 0; i < serial->num_ports; ++i) {
 464                 tport = kmalloc(sizeof(struct ti_port), GFP_KERNEL);
 465                 if (tport == NULL) {
 466                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
 467                         status = -ENOMEM;
 468                         goto free_tports;
 469                 }
 470                 memset(tport, 0, sizeof(struct ti_port));
 471                 spin_lock_init(&tport->tp_lock);
 472                 tport->tp_uart_base_addr = (i == 0 ? TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 473                 tport->tp_flags = low_latency ? ASYNC_LOW_LATENCY : 0;
 474                 tport->tp_closing_wait = closing_wait;
 475                 init_waitqueue_head(&tport->tp_msr_wait);
 476                 init_waitqueue_head(&tport->tp_write_wait);
 477                 tport->tp_write_buf = ti_buf_alloc();
 478                 if (tport->tp_write_buf == NULL) {
 479                         dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
 480                         kfree(tport);
 481                         status = -ENOMEM;
 482                         goto free_tports;
 483                 }
 484                 tport->tp_port = serial->port[i];
 485                 tport->tp_tdev = tdev;
 486                 usb_set_serial_port_data(serial->port[i], tport);
 487                 tport->tp_uart_mode = 0;        /* default is RS232 */
 488         }
 489
 490         return 0;
 491
 492 free_tports:
 493         for (--i; i>=0; --i) {
 494                 tport = usb_get_serial_port_data(serial->port[i]);
 495                 ti_buf_free(tport->tp_write_buf);
 496                 kfree(tport);
 497                 usb_set_serial_port_data(serial->port[i], NULL);
 498         }
 499 free_tdev:
 500         kfree(tdev);
 501         usb_set_serial_data(serial, NULL);
 502         return status;
 503 }
 504
 505
 506 static void ti_shutdown(struct usb_serial *serial)
 507 {
 508         int i;
 509         struct ti_device *tdev = usb_get_serial_data(serial);
 510         struct ti_port *tport;
 511
 512         dbg("%s", __FUNCTION__);
 513
 514         for (i=0; i < serial->num_ports; ++i) {
 515                 tport = usb_get_serial_port_data(serial->port[i]);
 516                 if (tport) {
 517                         ti_buf_free(tport->tp_write_buf);
 518                         kfree(tport);
 519                         usb_set_serial_port_data(serial->port[i], NULL);
 520                 }
 521         }
 522
 523         kfree(tdev);
 524         usb_set_serial_data(serial, NULL);
 525 }
 526
 527
 528 static int ti_open(struct usb_serial_port *port, struct file *file)
 529 {
 530         struct ti_port *tport = usb_get_serial_port_data(port);
 531         struct ti_device *tdev;
 532         struct usb_device *dev;
 533         struct urb *urb;
 534         int port_number;
 535         int status;
 536         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 537                              TI_PIPE_TIMEOUT_ENABLE |
 538                              (TI_TRANSFER_TIMEOUT << 2));
 539
 540         dbg("%s - port %d", __FUNCTION__, port->number);
 541
 542         if (tport == NULL)
 543                 return -ENODEV;
 544
 545         dev = port->serial->dev;
 546         tdev = tport->tp_tdev;
 547
 548         /* only one open on any port on a device at a time */
 549         if (down_interruptible(&tdev->td_open_close_sem))
 550                 return -ERESTARTSYS;
 551
 552         if (port->tty)
 553                 port->tty->low_latency =
 554                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
 555
 556         port_number = port->number - port->serial->minor;
 557
 558         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 559
 560         tport->tp_msr = 0;
 561         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 562
 563         /* start interrupt urb the first time a port is opened on this device */
 564         if (tdev->td_open_port_count == 0) {
 565                 dbg("%s - start interrupt in urb", __FUNCTION__);
 566                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 567                 if (!urb) {
 568                         dev_err(&port->dev, "%s - no interrupt urb\n", __FUNCTION__);
 569                         status = -EINVAL;
 570                         goto up_sem;
 571                 }
 572                 urb->complete = ti_interrupt_callback;
 573                 urb->context = tdev;
 574                 urb->dev = dev;
 575                 status = usb_submit_urb(urb, GFP_KERNEL);
 576                 if (status) {
 577                         dev_err(&port->dev, "%s - submit interrupt urb failed, %d\n", __FUNCTION__, status);
 578                         goto up_sem;
 579                 }
 580         }
 581
 582         ti_set_termios(port, NULL);
 583
 584         dbg("%s - sending TI_OPEN_PORT", __FUNCTION__);
 585         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 586                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 587         if (status) {
 588                 dev_err(&port->dev, "%s - cannot send open command, %d\n", __FUNCTION__, status);
 589                 goto unlink_int_urb;
 590         }
 591
 592         dbg("%s - sending TI_START_PORT", __FUNCTION__);
 593         status = ti_command_out_sync(tdev, TI_START_PORT,
 594                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 595         if (status) {
 596                 dev_err(&port->dev, "%s - cannot send start command, %d\n", __FUNCTION__, status);
 597                 goto unlink_int_urb;
 598         }
 599
 600         dbg("%s - sending TI_PURGE_PORT", __FUNCTION__);
 601         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 602                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 603         if (status) {
 604                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n", __FUNCTION__, status);
 605                 goto unlink_int_urb;
 606         }
 607         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 608                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 609         if (status) {
 610                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n", __FUNCTION__, status);
 611                 goto unlink_int_urb;
 612         }
 613
 614         /* reset the data toggle on the bulk endpoints to work around bug in
 615          * host controllers where things get out of sync some times */
 616         usb_clear_halt(dev, port->write_urb->pipe);
 617         usb_clear_halt(dev, port->read_urb->pipe);
 618
 619         ti_set_termios(port, NULL);
 620
 621         dbg("%s - sending TI_OPEN_PORT (2)", __FUNCTION__);
 622         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 623                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 624         if (status) {
 625                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n", __FUNCTION__, status);
 626                 goto unlink_int_urb;
 627         }
 628
 629         dbg("%s - sending TI_START_PORT (2)", __FUNCTION__);
 630         status = ti_command_out_sync(tdev, TI_START_PORT,
 631                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 632         if (status) {
 633                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n", __FUNCTION__, status);
 634                 goto unlink_int_urb;
 635         }
 636
 637         /* start read urb */
 638         dbg("%s - start read urb", __FUNCTION__);
 639         urb = port->read_urb;
 640         if (!urb) {
 641                 dev_err(&port->dev, "%s - no read urb\n", __FUNCTION__);
 642                 status = -EINVAL;
 643                 goto unlink_int_urb;
 644         }
 645         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 646         urb->complete = ti_bulk_in_callback;
 647         urb->context = tport;
 648         urb->dev = dev;
 649         status = usb_submit_urb(urb, GFP_KERNEL);
 650         if (status) {
 651                 dev_err(&port->dev, "%s - submit read urb failed, %d\n", __FUNCTION__, status);
 652                 goto unlink_int_urb;
 653         }
 654
 655         tport->tp_is_open = 1;
 656         ++tdev->td_open_port_count;
 657
 658         goto up_sem;
 659
 660 unlink_int_urb:
 661         if (tdev->td_open_port_count == 0)
 662                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 663 up_sem:
 664         up(&tdev->td_open_close_sem);
 665         dbg("%s - exit %d", __FUNCTION__, status);
 666         return status;
 667 }
 668
 669
 670 static void ti_close(struct usb_serial_port *port, struct file *file)
 671 {
 672         struct ti_device *tdev;
 673         struct ti_port *tport;
 674         int port_number;
 675         int status;
 676         int do_up;
 677
 678         dbg("%s - port %d", __FUNCTION__, port->number);
 679
 680         tdev = usb_get_serial_data(port->serial);
 681         tport = usb_get_serial_port_data(port);
 682         if (tdev == NULL || tport == NULL)
 683                 return;
 684
 685         tport->tp_is_open = 0;
 686
 687         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 688
 689         usb_kill_urb(port->read_urb);
 690         usb_kill_urb(port->write_urb);
 691         tport->tp_write_urb_in_use = 0;
 692
 693         port_number = port->number - port->serial->minor;
 694
 695         dbg("%s - sending TI_CLOSE_PORT", __FUNCTION__);
 696         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 697                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 698         if (status)
 699                 dev_err(&port->dev, "%s - cannot send close port command, %d\n" , __FUNCTION__, status);
 700
 701         /* if down is interrupted, continue anyway */
 702         do_up = !down_interruptible(&tdev->td_open_close_sem);
 703         --tport->tp_tdev->td_open_port_count;
 704         if (tport->tp_tdev->td_open_port_count <= 0) {
 705                 /* last port is closed, shut down interrupt urb */
 706                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 707                 tport->tp_tdev->td_open_port_count = 0;
 708         }
 709         if (do_up)
 710                 up(&tdev->td_open_close_sem);
 711
 712         dbg("%s - exit", __FUNCTION__);
 713 }
 714
 715
 716 static int ti_write(struct usb_serial_port *port, const unsigned char *data,
 717         int count)
 718 {
 719         struct ti_port *tport = usb_get_serial_port_data(port);
 720         unsigned long flags;
 721
 722         dbg("%s - port %d", __FUNCTION__, port->number);
 723
 724         if (count == 0) {
 725                 dbg("%s - write request of 0 bytes", __FUNCTION__);
 726                 return 0;
 727         }
 728
 729         if (tport == NULL || !tport->tp_is_open)
 730                 return -ENODEV;
 731
 732         spin_lock_irqsave(&tport->tp_lock, flags);
 733         count = ti_buf_put(tport->tp_write_buf, data, count);
 734         spin_unlock_irqrestore(&tport->tp_lock, flags);
 735
 736         ti_send(tport);
 737
 738         return count;
 739 }
 740
 741
 742 static int ti_write_room(struct usb_serial_port *port)
 743 {
 744         struct ti_port *tport = usb_get_serial_port_data(port);
 745         int room = 0;
 746         unsigned long flags;
 747
 748         dbg("%s - port %d", __FUNCTION__, port->number);
 749
 750         if (tport == NULL)
 751                 return -ENODEV;
 752
 753         spin_lock_irqsave(&tport->tp_lock, flags);
 754         room = ti_buf_space_avail(tport->tp_write_buf);
 755         spin_unlock_irqrestore(&tport->tp_lock, flags);
 756
 757         dbg("%s - returns %d", __FUNCTION__, room);
 758         return room;
 759 }
 760
 761
 762 static int ti_chars_in_buffer(struct usb_serial_port *port)
 763 {
 764         struct ti_port *tport = usb_get_serial_port_data(port);
 765         int chars = 0;
 766         unsigned long flags;
 767
 768         dbg("%s - port %d", __FUNCTION__, port->number);
 769
 770         if (tport == NULL)
 771                 return -ENODEV;
 772
 773         spin_lock_irqsave(&tport->tp_lock, flags);
 774         chars = ti_buf_data_avail(tport->tp_write_buf);
 775         spin_unlock_irqrestore(&tport->tp_lock, flags);
 776
 777         dbg("%s - returns %d", __FUNCTION__, chars);
 778         return chars;
 779 }
 780
 781
 782 static void ti_throttle(struct usb_serial_port *port)
 783 {
 784         struct ti_port *tport = usb_get_serial_port_data(port);
 785         struct tty_struct *tty;
 786
 787         dbg("%s - port %d", __FUNCTION__, port->number);
 788
 789         if (tport == NULL)
 790                 return;
 791
 792         tty = port->tty;
 793         if (!tty) {
 794                 dbg("%s - no tty", __FUNCTION__);
 795                 return;
 796         }
 797
 798         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 799                 ti_stop_read(tport, tty);
 800
 801 }
 802
 803
 804 static void ti_unthrottle(struct usb_serial_port *port)
 805 {
 806         struct ti_port *tport = usb_get_serial_port_data(port);
 807         struct tty_struct *tty;
 808         int status;
 809
 810         dbg("%s - port %d", __FUNCTION__, port->number);
 811
 812         if (tport == NULL)
 813                 return;
 814
 815         tty = port->tty;
 816         if (!tty) {
 817                 dbg("%s - no tty", __FUNCTION__);
 818                 return;
 819         }
 820
 821         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 822                 status = ti_restart_read(tport, tty);
 823                 if (status)
 824                         dev_err(&port->dev, "%s - cannot restart read, %d\n", __FUNCTION__, status);
 825         }
 826 }
 827
 828
 829 static int ti_ioctl(struct usb_serial_port *port, struct file *file,
 830         unsigned int cmd, unsigned long arg)
 831 {
 832         struct ti_port *tport = usb_get_serial_port_data(port);
 833         struct async_icount cnow;
 834         struct async_icount cprev;
 835
 836         dbg("%s - port %d, cmd = 0x%04X", __FUNCTION__, port->number, cmd);
 837
 838         if (tport == NULL)
 839                 return -ENODEV;
 840
 841         switch (cmd) {
 842                 case TIOCGSERIAL:
 843                         dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
 844                         return ti_get_serial_info(tport, (struct serial_struct __user *)arg);
 845                         break;
 846
 847                 case TIOCSSERIAL:
 848                         dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
 849                         return ti_set_serial_info(tport, (struct serial_struct __user *)arg);
 850                         break;
 851
 852                 case TIOCMIWAIT:
 853                         dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
 854                         cprev = tport->tp_icount;
 855                         while (1) {
 856                                 interruptible_sleep_on(&tport->tp_msr_wait);
 857                                 if (signal_pending(current))
 858                                         return -ERESTARTSYS;
 859                                 cnow = tport->tp_icount;
 860                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 861                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 862                                         return -EIO; /* no change => error */
 863                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 864                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 865                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 866                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
 867                                         return 0;
 868                                 }
 869                                 cprev = cnow;
 870                         }
 871                         break;
 872
 873                 case TIOCGICOUNT:
 874                         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__, port->number, tport->tp_icount.rx, tport->tp_icount.tx);
 875                         if (copy_to_user((void __user *)arg, &tport->tp_icount, sizeof(tport->tp_icount)))
 876                                 return -EFAULT;
 877                         return 0;
 878         }
 879
 880         return -ENOIOCTLCMD;
 881 }
 882
 883
 884 static void ti_set_termios(struct usb_serial_port *port,
 885         struct termios *old_termios)
 886 {
 887         struct ti_port *tport = usb_get_serial_port_data(port);
 888         struct tty_struct *tty = port->tty;
 889         struct ti_uart_config *config;
 890         tcflag_t cflag,iflag;
 891         int baud;
 892         int status;
 893         int port_number = port->number - port->serial->minor;
 894         unsigned int mcr;
 895
 896         dbg("%s - port %d", __FUNCTION__, port->number);
 897
 898         if (!tty || !tty->termios) {
 899                 dbg("%s - no tty or termios", __FUNCTION__);
 900                 return;
 901         }
 902
 903         cflag = tty->termios->c_cflag;
 904         iflag = tty->termios->c_iflag;
 905
 906         if (old_termios && cflag == old_termios->c_cflag
 907         && iflag == old_termios->c_iflag) {
 908                 dbg("%s - nothing to change", __FUNCTION__);
 909                 return;
 910         }
 911
 912         dbg("%s - clfag %08x, iflag %08x", __FUNCTION__, cflag, iflag);
 913
 914         if (old_termios)
 915                 dbg("%s - old clfag %08x, old iflag %08x", __FUNCTION__, old_termios->c_cflag, old_termios->c_iflag);
 916
 917         if (tport == NULL)
 918                 return;
 919
 920         config = kmalloc(sizeof(*config), GFP_KERNEL);
 921         if (!config) {
 922                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
 923                 return;
 924         }
 925
 926         config->wFlags = 0;
 927
 928         /* these flags must be set */
 929         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 930         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 931         config->bUartMode = (__u8)(tport->tp_uart_mode);
 932
 933         switch (cflag & CSIZE) {
 934                 case CS5:
 935                             config->bDataBits = TI_UART_5_DATA_BITS;
 936                             break;
 937                 case CS6:
 938                             config->bDataBits = TI_UART_6_DATA_BITS;
 939                             break;
 940                 case CS7:
 941                             config->bDataBits = TI_UART_7_DATA_BITS;
 942                             break;
 943                 default:
 944                 case CS8:
 945                             config->bDataBits = TI_UART_8_DATA_BITS;
 946                             break;
 947         }
 948
 949         if (cflag & PARENB) {
 950                 if (cflag & PARODD) {
 951                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 952                         config->bParity = TI_UART_ODD_PARITY;
 953                 } else {
 954                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 955                         config->bParity = TI_UART_EVEN_PARITY;
 956                 }
 957         } else {
 958                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 959                 config->bParity = TI_UART_NO_PARITY;
 960         }
 961
 962         if (cflag & CSTOPB)
 963                 config->bStopBits = TI_UART_2_STOP_BITS;
 964         else
 965                 config->bStopBits = TI_UART_1_STOP_BITS;
 966
 967         if (cflag & CRTSCTS) {
 968                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 969                 if ((cflag & CBAUD) != B0)
 970                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 971                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 972         } else {
 973                 tty->hw_stopped = 0;
 974                 ti_restart_read(tport, tty);
 975         }
 976
 977         if (I_IXOFF(tty) || I_IXON(tty)) {
 978                 config->cXon  = START_CHAR(tty);
 979                 config->cXoff = STOP_CHAR(tty);
 980
 981                 if (I_IXOFF(tty))
 982                         config->wFlags |= TI_UART_ENABLE_X_IN;
 983                 else
 984                         ti_restart_read(tport, tty);
 985
 986                 if (I_IXON(tty))
 987                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 988         }
 989
 990         baud = tty_get_baud_rate(tty);
 991         if (!baud) baud = 9600;
 992         if (tport->tp_tdev->td_is_3410)
 993                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 994         else
 995                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 996
 997         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 998         __FUNCTION__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 999
1000         cpu_to_be16s(&config->wBaudRate);
1001         cpu_to_be16s(&config->wFlags);
1002
1003         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
1004                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
1005                 sizeof(*config));
1006         if (status)
1007                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n", __FUNCTION__, port_number, status);
1008
1009         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
1010         mcr = tport->tp_shadow_mcr;
1011         /* if baud rate is B0, clear RTS and DTR */
1012         if ((cflag & CBAUD) == B0)
1013                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
1014         status = ti_set_mcr(tport, mcr);
1015         if (status)
1016                 dev_err(&port->dev, "%s - cannot set modem control on port %d, %d\n", __FUNCTION__, port_number, status);
1017
1018         kfree(config);
1019 }
1020
1021
1022 static int ti_tiocmget(struct usb_serial_port *port, struct file *file)
1023 {
1024         struct ti_port *tport = usb_get_serial_port_data(port);
1025         unsigned int result;
1026         unsigned int msr;
1027         unsigned int mcr;
1028
1029         dbg("%s - port %d", __FUNCTION__, port->number);
1030
1031         if (tport == NULL)
1032                 return -ENODEV;
1033
1034         msr = tport->tp_msr;
1035         mcr = tport->tp_shadow_mcr;
1036
1037         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1038                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1039                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1040                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1041                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1042                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1043                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1044
1045         dbg("%s - 0x%04X", __FUNCTION__, result);
1046
1047         return result;
1048 }
1049
1050
1051 static int ti_tiocmset(struct usb_serial_port *port, struct file *file,
1052         unsigned int set, unsigned int clear)
1053 {
1054         struct ti_port *tport = usb_get_serial_port_data(port);
1055         unsigned int mcr;
1056
1057         dbg("%s - port %d", __FUNCTION__, port->number);
1058
1059         if (tport == NULL)
1060                 return -ENODEV;
1061
1062         mcr = tport->tp_shadow_mcr;
1063
1064         if (set & TIOCM_RTS)
1065                 mcr |= TI_MCR_RTS;
1066         if (set & TIOCM_DTR)
1067                 mcr |= TI_MCR_DTR;
1068         if (set & TIOCM_LOOP)
1069                 mcr |= TI_MCR_LOOP;
1070
1071         if (clear & TIOCM_RTS)
1072                 mcr &= ~TI_MCR_RTS;
1073         if (clear & TIOCM_DTR)
1074                 mcr &= ~TI_MCR_DTR;
1075         if (clear & TIOCM_LOOP)
1076                 mcr &= ~TI_MCR_LOOP;
1077
1078         return ti_set_mcr(tport, mcr);
1079 }
1080
1081
1082 static void ti_break(struct usb_serial_port *port, int break_state)
1083 {
1084         struct ti_port *tport = usb_get_serial_port_data(port);
1085         int status;
1086
1087         dbg("%s - state = %d", __FUNCTION__, break_state);
1088
1089         if (tport == NULL)
1090                 return;
1091
1092         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1093
1094         status = ti_write_byte(tport->tp_tdev,
1095                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1096                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1097
1098         if (status)
1099                 dbg("%s - error setting break, %d", __FUNCTION__, status);
1100 }
1101
1102
1103 static void ti_interrupt_callback(struct urb *urb, struct pt_regs *regs)
1104 {
1105         struct ti_device *tdev = (struct ti_device *)urb->context;
1106         struct usb_serial_port *port;
1107         struct usb_serial *serial = tdev->td_serial;
1108         struct ti_port *tport;
1109         struct device *dev = &urb->dev->dev;
1110         unsigned char *data = urb->transfer_buffer;
1111         int length = urb->actual_length;
1112         int port_number;
1113         int function;
1114         int status;
1115         __u8 msr;
1116
1117         dbg("%s", __FUNCTION__);
1118
1119         switch (urb->status) {
1120         case 0:
1121                 break;
1122         case -ECONNRESET:
1123         case -ENOENT:
1124         case -ESHUTDOWN:
1125                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1126                 tdev->td_urb_error = 1;
1127                 return;
1128         default:
1129                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1130                 tdev->td_urb_error = 1;
1131                 goto exit;
1132         }
1133
1134         if (length != 2) {
1135                 dbg("%s - bad packet size, %d", __FUNCTION__, length);
1136                 goto exit;
1137         }
1138
1139         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1140                 dev_err(dev, "%s - hardware error, %d\n", __FUNCTION__, data[1]);
1141                 goto exit;
1142         }
1143
1144         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1145         function = TI_GET_FUNC_FROM_CODE(data[0]);
1146
1147         dbg("%s - port_number %d, function %d, data 0x%02X", __FUNCTION__, port_number, function, data[1]);
1148
1149         if (port_number >= serial->num_ports) {
1150                 dev_err(dev, "%s - bad port number, %d\n", __FUNCTION__, port_number);
1151                 goto exit;
1152         }
1153
1154         port = serial->port[port_number];
1155
1156         tport = usb_get_serial_port_data(port);
1157         if (!tport)
1158                 goto exit;
1159
1160         switch (function) {
1161         case TI_CODE_DATA_ERROR:
1162                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n", __FUNCTION__, port_number, data[1]);
1163                 break;
1164
1165         case TI_CODE_MODEM_STATUS:
1166                 msr = data[1];
1167                 dbg("%s - port %d, msr 0x%02X", __FUNCTION__, port_number, msr);
1168                 ti_handle_new_msr(tport, msr);
1169                 break;
1170
1171         default:
1172                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n", __FUNCTION__, data[1]);
1173                 break;
1174         }
1175
1176 exit:
1177         status = usb_submit_urb(urb, GFP_ATOMIC);
1178         if (status)
1179                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n", __FUNCTION__, status);
1180 }
1181
1182
1183 static void ti_bulk_in_callback(struct urb *urb, struct pt_regs *regs)
1184 {
1185         struct ti_port *tport = (struct ti_port *)urb->context;
1186         struct usb_serial_port *port = tport->tp_port;
1187         struct device *dev = &urb->dev->dev;
1188         int status = 0;
1189
1190         dbg("%s", __FUNCTION__);
1191
1192         switch (urb->status) {
1193         case 0:
1194                 break;
1195         case -ECONNRESET:
1196         case -ENOENT:
1197         case -ESHUTDOWN:
1198                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1199                 tport->tp_tdev->td_urb_error = 1;
1200                 wake_up_interruptible(&tport->tp_write_wait);
1201                 return;
1202         default:
1203                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status );
1204                 tport->tp_tdev->td_urb_error = 1;
1205                 wake_up_interruptible(&tport->tp_write_wait);
1206         }
1207
1208         if (urb->status == -EPIPE)
1209                 goto exit;
1210
1211         if (urb->status) {
1212                 dev_err(dev, "%s - stopping read!\n", __FUNCTION__);
1213                 return;
1214         }
1215
1216         if (port->tty && urb->actual_length) {
1217                 usb_serial_debug_data(debug, dev, __FUNCTION__,
1218                         urb->actual_length, urb->transfer_buffer);
1219
1220                 if (!tport->tp_is_open)
1221                         dbg("%s - port closed, dropping data", __FUNCTION__);
1222                 else
1223                         ti_recv(&urb->dev->dev, port->tty, urb->transfer_buffer,
1224                                 urb->actual_length);
1225
1226                 spin_lock(&tport->tp_lock);
1227                 tport->tp_icount.rx += urb->actual_length;
1228                 spin_unlock(&tport->tp_lock);
1229         }
1230
1231 exit:
1232         /* continue to read unless stopping */
1233         spin_lock(&tport->tp_lock);
1234         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1235                 urb->dev = port->serial->dev;
1236                 status = usb_submit_urb(urb, GFP_ATOMIC);
1237         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1238                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1239         }
1240         spin_unlock(&tport->tp_lock);
1241         if (status)
1242                 dev_err(dev, "%s - resubmit read urb failed, %d\n", __FUNCTION__, status);
1243 }
1244
1245
1246 static void ti_bulk_out_callback(struct urb *urb, struct pt_regs *regs)
1247 {
1248         struct ti_port *tport = (struct ti_port *)urb->context;
1249         struct usb_serial_port *port = tport->tp_port;
1250         struct device *dev = &urb->dev->dev;
1251
1252         dbg("%s - port %d", __FUNCTION__, port->number);
1253
1254         tport->tp_write_urb_in_use = 0;
1255
1256         switch (urb->status) {
1257         case 0:
1258                 break;
1259         case -ECONNRESET:
1260         case -ENOENT:
1261         case -ESHUTDOWN:
1262                 dbg("%s - urb shutting down, %d", __FUNCTION__, urb->status);
1263                 tport->tp_tdev->td_urb_error = 1;
1264                 wake_up_interruptible(&tport->tp_write_wait);
1265                 return;
1266         default:
1267                 dev_err(dev, "%s - nonzero urb status, %d\n", __FUNCTION__, urb->status);
1268                 tport->tp_tdev->td_urb_error = 1;
1269                 wake_up_interruptible(&tport->tp_write_wait);
1270         }
1271
1272         /* send any buffered data */
1273         ti_send(tport);
1274 }
1275
1276
1277 static void ti_recv(struct device *dev, struct tty_struct *tty,
1278         unsigned char *data, int length)
1279 {
1280         int cnt;
1281
1282         do {
1283                 cnt = tty_buffer_request_room(tty, length);
1284                 if (cnt < length) {
1285                         dev_err(dev, "%s - dropping data, %d bytes lost\n", __FUNCTION__, length - cnt);
1286                         if(cnt == 0)
1287                                 break;
1288                 }
1289                 tty_insert_flip_string(tty, data, cnt);
1290                 tty_flip_buffer_push(tty);
1291                 data += cnt;
1292                 length -= cnt;
1293         } while (length > 0);
1294
1295 }
1296
1297
1298 static void ti_send(struct ti_port *tport)
1299 {
1300         int count, result;
1301         struct usb_serial_port *port = tport->tp_port;
1302         struct tty_struct *tty = port->tty;
1303         unsigned long flags;
1304
1305
1306         dbg("%s - port %d", __FUNCTION__, port->number);
1307
1308         spin_lock_irqsave(&tport->tp_lock, flags);
1309
1310         if (tport->tp_write_urb_in_use) {
1311                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1312                 return;
1313         }
1314
1315         count = ti_buf_get(tport->tp_write_buf,
1316                                 port->write_urb->transfer_buffer,
1317                                 port->bulk_out_size);
1318
1319         if (count == 0) {
1320                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1321                 return;
1322         }
1323
1324         tport->tp_write_urb_in_use = 1;
1325
1326         spin_unlock_irqrestore(&tport->tp_lock, flags);
1327
1328         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
1329
1330         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1331                            usb_sndbulkpipe(port->serial->dev,
1332                                             port->bulk_out_endpointAddress),
1333                            port->write_urb->transfer_buffer, count,
1334                            ti_bulk_out_callback, tport);
1335
1336         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1337         if (result) {
1338                 dev_err(&port->dev, "%s - submit write urb failed, %d\n", __FUNCTION__, result);
1339                 tport->tp_write_urb_in_use = 0;
1340                 /* TODO: reschedule ti_send */
1341         } else {
1342                 spin_lock_irqsave(&tport->tp_lock, flags);
1343                 tport->tp_icount.tx += count;
1344                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1345         }
1346
1347         /* more room in the buffer for new writes, wakeup */
1348         if (tty)
1349                 tty_wakeup(tty);
1350         wake_up_interruptible(&tport->tp_write_wait);
1351 }
1352
1353
1354 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1355 {
1356         int status;
1357
1358         status = ti_write_byte(tport->tp_tdev,
1359                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1360                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1361
1362         if (!status)
1363                 tport->tp_shadow_mcr = mcr;
1364
1365         return status;
1366 }
1367
1368
1369 static int ti_get_lsr(struct ti_port *tport)
1370 {
1371         int size,status;
1372         struct ti_device *tdev = tport->tp_tdev;
1373         struct usb_serial_port *port = tport->tp_port;
1374         int port_number = port->number - port->serial->minor;
1375         struct ti_port_status *data;
1376
1377         dbg("%s - port %d", __FUNCTION__, port->number);
1378
1379         size = sizeof(struct ti_port_status);
1380         data = kmalloc(size, GFP_KERNEL);
1381         if (!data) {
1382                 dev_err(&port->dev, "%s - out of memory\n", __FUNCTION__);
1383                 return -ENOMEM;
1384         }
1385
1386         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1387                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1388         if (status) {
1389                 dev_err(&port->dev, "%s - get port status command failed, %d\n", __FUNCTION__, status);
1390                 goto free_data;
1391         }
1392
1393         dbg("%s - lsr 0x%02X", __FUNCTION__, data->bLSR);
1394
1395         tport->tp_lsr = data->bLSR;
1396
1397 free_data:
1398         kfree(data);
1399         return status;
1400 }
1401
1402
1403 static int ti_get_serial_info(struct ti_port *tport,
1404         struct serial_struct __user *ret_arg)
1405 {
1406         struct usb_serial_port *port = tport->tp_port;
1407         struct serial_struct ret_serial;
1408
1409         if (!ret_arg)
1410                 return -EFAULT;
1411
1412         memset(&ret_serial, 0, sizeof(ret_serial));
1413
1414         ret_serial.type = PORT_16550A;
1415         ret_serial.line = port->serial->minor;
1416         ret_serial.port = port->number - port->serial->minor;
1417         ret_serial.flags = tport->tp_flags;
1418         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1419         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1420         ret_serial.closing_wait = tport->tp_closing_wait;
1421
1422         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1423                 return -EFAULT;
1424
1425         return 0;
1426 }
1427
1428
1429 static int ti_set_serial_info(struct ti_port *tport,
1430         struct serial_struct __user *new_arg)
1431 {
1432         struct usb_serial_port *port = tport->tp_port;
1433         struct serial_struct new_serial;
1434
1435         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1436                 return -EFAULT;
1437
1438         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1439         if (port->tty)
1440                 port->tty->low_latency =
1441                         (tport->tp_flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1442         tport->tp_closing_wait = new_serial.closing_wait;
1443
1444         return 0;
1445 }
1446
1447
1448 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1449 {
1450         struct async_icount *icount;
1451         struct tty_struct *tty;
1452         unsigned long flags;
1453
1454         dbg("%s - msr 0x%02X", __FUNCTION__, msr);
1455
1456         if (msr & TI_MSR_DELTA_MASK) {
1457                 spin_lock_irqsave(&tport->tp_lock, flags);
1458                 icount = &tport->tp_icount;
1459                 if (msr & TI_MSR_DELTA_CTS)
1460                         icount->cts++;
1461                 if (msr & TI_MSR_DELTA_DSR)
1462                         icount->dsr++;
1463                 if (msr & TI_MSR_DELTA_CD)
1464                         icount->dcd++;
1465                 if (msr & TI_MSR_DELTA_RI)
1466                         icount->rng++;
1467                 wake_up_interruptible(&tport->tp_msr_wait);
1468                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1469         }
1470
1471         tport->tp_msr = msr & TI_MSR_MASK;
1472
1473         /* handle CTS flow control */
1474         tty = tport->tp_port->tty;
1475         if (tty && C_CRTSCTS(tty)) {
1476                 if (msr & TI_MSR_CTS) {
1477                         tty->hw_stopped = 0;
1478                         tty_wakeup(tty);
1479                 } else {
1480                         tty->hw_stopped = 1;
1481                 }
1482         }
1483 }
1484
1485
1486 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1487 {
1488         struct ti_device *tdev = tport->tp_tdev;
1489         struct usb_serial_port *port = tport->tp_port;
1490         wait_queue_t wait;
1491         unsigned long flags;
1492
1493         dbg("%s - port %d", __FUNCTION__, port->number);
1494
1495         spin_lock_irqsave(&tport->tp_lock, flags);
1496
1497         /* wait for data to drain from the buffer */
1498         tdev->td_urb_error = 0;
1499         init_waitqueue_entry(&wait, current);
1500         add_wait_queue(&tport->tp_write_wait, &wait);
1501         for (;;) {
1502                 set_current_state(TASK_INTERRUPTIBLE);
1503                 if (ti_buf_data_avail(tport->tp_write_buf) == 0
1504                 || timeout == 0 || signal_pending(current)
1505                 || tdev->td_urb_error
1506                 || !usb_get_intfdata(port->serial->interface))  /* disconnect */
1507                         break;
1508                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1509                 timeout = schedule_timeout(timeout);
1510                 spin_lock_irqsave(&tport->tp_lock, flags);
1511         }
1512         set_current_state(TASK_RUNNING);
1513         remove_wait_queue(&tport->tp_write_wait, &wait);
1514
1515         /* flush any remaining data in the buffer */
1516         if (flush)
1517                 ti_buf_clear(tport->tp_write_buf);
1518
1519         spin_unlock_irqrestore(&tport->tp_lock, flags);
1520
1521         /* wait for data to drain from the device */
1522         /* wait for empty tx register, plus 20 ms */
1523         timeout += jiffies;
1524         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1525         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1526         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1527         && usb_get_intfdata(port->serial->interface)) {  /* not disconnected */
1528                 if (ti_get_lsr(tport))
1529                         break;
1530                 msleep_interruptible(20);
1531         }
1532 }
1533
1534
1535 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1536 {
1537         unsigned long flags;
1538
1539         spin_lock_irqsave(&tport->tp_lock, flags);
1540
1541         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1542                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1543
1544         spin_unlock_irqrestore(&tport->tp_lock, flags);
1545 }
1546
1547
1548 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1549 {
1550         struct urb *urb;
1551         int status = 0;
1552         unsigned long flags;
1553
1554         spin_lock_irqsave(&tport->tp_lock, flags);
1555
1556         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1557                 urb = tport->tp_port->read_urb;
1558                 urb->complete = ti_bulk_in_callback;
1559                 urb->context = tport;
1560                 urb->dev = tport->tp_port->serial->dev;
1561                 status = usb_submit_urb(urb, GFP_KERNEL);
1562         }
1563         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1564
1565         spin_unlock_irqrestore(&tport->tp_lock, flags);
1566
1567         return status;
1568 }
1569
1570
1571 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1572         __u16 moduleid, __u16 value, __u8 *data, int size)
1573 {
1574         int status;
1575
1576         status = usb_control_msg(tdev->td_serial->dev,
1577                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1578                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1579                 value, moduleid, data, size, 1000);
1580
1581         if (status == size)
1582                 status = 0;
1583
1584         if (status > 0)
1585                 status = -ECOMM;
1586
1587         return status;
1588 }
1589
1590
1591 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1592         __u16 moduleid, __u16 value, __u8 *data, int size)
1593 {
1594         int status;
1595
1596         status = usb_control_msg(tdev->td_serial->dev,
1597                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1598                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1599                 value, moduleid, data, size, 1000);
1600
1601         if (status == size)
1602                 status = 0;
1603
1604         if (status > 0)
1605                 status = -ECOMM;
1606
1607         return status;
1608 }
1609
1610
1611 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1612         __u8 mask, __u8 byte)
1613 {
1614         int status;
1615         unsigned int size;
1616         struct ti_write_data_bytes *data;
1617         struct device *dev = &tdev->td_serial->dev->dev;
1618
1619         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X", __FUNCTION__, addr, mask, byte);
1620
1621         size = sizeof(struct ti_write_data_bytes) + 2;
1622         data = kmalloc(size, GFP_KERNEL);
1623         if (!data) {
1624                 dev_err(dev, "%s - out of memory\n", __FUNCTION__);
1625                 return -ENOMEM;
1626         }
1627
1628         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1629         data->bDataType = TI_RW_DATA_BYTE;
1630         data->bDataCounter = 1;
1631         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1632         data->wBaseAddrLo = cpu_to_be16(addr);
1633         data->bData[0] = mask;
1634         data->bData[1] = byte;
1635
1636         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1637                 (__u8 *)data, size);
1638
1639         if (status < 0)
1640                 dev_err(dev, "%s - failed, %d\n", __FUNCTION__, status);
1641
1642         kfree(data);
1643
1644         return status;
1645 }
1646
1647
1648 static int ti_download_firmware(struct ti_device *tdev,
1649         unsigned char *firmware, unsigned int firmware_size)
1650 {
1651         int status = 0;
1652         int buffer_size;
1653         int pos;
1654         int len;
1655         int done;
1656         __u8 cs = 0;
1657         __u8 *buffer;
1658         struct usb_device *dev = tdev->td_serial->dev;
1659         struct ti_firmware_header *header;
1660         unsigned int pipe = usb_sndbulkpipe(dev,
1661                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
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                 dev_err(&dev->dev, "%s - out of memory\n", __FUNCTION__);
1668                 return -ENOMEM;
1669         }
1670
1671         memcpy(buffer, firmware, firmware_size);
1672         memset(buffer+firmware_size, 0xff, buffer_size-firmware_size);
1673
1674         for(pos = sizeof(struct ti_firmware_header); pos < buffer_size; pos++)
1675                 cs = (__u8)(cs + buffer[pos]);
1676
1677         header = (struct ti_firmware_header *)buffer;
1678         header->wLength = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_firmware_header)));
1679         header->bCheckSum = cs;
1680
1681         dbg("%s - downloading firmware", __FUNCTION__);
1682         for (pos = 0; pos < buffer_size; pos += done) {
1683                 len = min(buffer_size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1684                 status = usb_bulk_msg(dev, pipe, buffer+pos, len, &done, 1000);
1685                 if (status)
1686                         break;
1687         }
1688
1689         kfree(buffer);
1690
1691         if (status) {
1692                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n", __FUNCTION__, status);
1693                 return status;
1694         }
1695
1696         dbg("%s - download successful", __FUNCTION__);
1697
1698         return 0;
1699 }
1700
1701
1702 /* Circular Buffer Functions */
1703
1704 /*
1705  * ti_buf_alloc
1706  *
1707  * Allocate a circular buffer and all associated memory.
1708  */
1709
1710 static struct circ_buf *ti_buf_alloc(void)
1711 {
1712         struct circ_buf *cb;
1713
1714         cb = (struct circ_buf *)kmalloc(sizeof(struct circ_buf), GFP_KERNEL);
1715         if (cb == NULL)
1716                 return NULL;
1717
1718         cb->buf = kmalloc(TI_WRITE_BUF_SIZE, GFP_KERNEL);
1719         if (cb->buf == NULL) {
1720                 kfree(cb);
1721                 return NULL;
1722         }
1723
1724         ti_buf_clear(cb);
1725
1726         return cb;
1727 }
1728
1729
1730 /*
1731  * ti_buf_free
1732  *
1733  * Free the buffer and all associated memory.
1734  */
1735
1736 static void ti_buf_free(struct circ_buf *cb)
1737 {
1738         kfree(cb->buf);
1739         kfree(cb);
1740 }
1741
1742
1743 /*
1744  * ti_buf_clear
1745  *
1746  * Clear out all data in the circular buffer.
1747  */
1748
1749 static void ti_buf_clear(struct circ_buf *cb)
1750 {
1751         cb->head = cb->tail = 0;
1752 }
1753
1754
1755 /*
1756  * ti_buf_data_avail
1757  *
1758  * Return the number of bytes of data available in the circular
1759  * buffer.
1760  */
1761
1762 static int ti_buf_data_avail(struct circ_buf *cb)
1763 {
1764         return CIRC_CNT(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1765 }
1766
1767
1768 /*
1769  * ti_buf_space_avail
1770  *
1771  * Return the number of bytes of space available in the circular
1772  * buffer.
1773  */
1774
1775 static int ti_buf_space_avail(struct circ_buf *cb)
1776 {
1777         return CIRC_SPACE(cb->head,cb->tail,TI_WRITE_BUF_SIZE);
1778 }
1779
1780
1781 /*
1782  * ti_buf_put
1783  *
1784  * Copy data data from a user buffer and put it into the circular buffer.
1785  * Restrict to the amount of space available.
1786  *
1787  * Return the number of bytes copied.
1788  */
1789
1790 static int ti_buf_put(struct circ_buf *cb, const char *buf, int count)
1791 {
1792         int c, ret = 0;
1793
1794         while (1) {
1795                 c = CIRC_SPACE_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1796                 if (count < c)
1797                         c = count;
1798                 if (c <= 0)
1799                         break;
1800                 memcpy(cb->buf + cb->head, buf, c);
1801                 cb->head = (cb->head + c) & (TI_WRITE_BUF_SIZE-1);
1802                 buf += c;
1803                 count -= c;
1804                 ret += c;
1805         }
1806
1807         return ret;
1808 }
1809
1810
1811 /*
1812  * ti_buf_get
1813  *
1814  * Get data from the circular buffer and copy to the given buffer.
1815  * Restrict to the amount of data available.
1816  *
1817  * Return the number of bytes copied.
1818  */
1819
1820 static int ti_buf_get(struct circ_buf *cb, char *buf, int count)
1821 {
1822         int c, ret = 0;
1823
1824         while (1) {
1825                 c = CIRC_CNT_TO_END(cb->head, cb->tail, TI_WRITE_BUF_SIZE);
1826                 if (count < c)
1827                         c = count;
1828                 if (c <= 0)
1829                         break;
1830                 memcpy(buf, cb->buf + cb->tail, c);
1831                 cb->tail = (cb->tail + c) & (TI_WRITE_BUF_SIZE-1);
1832                 buf += c;
1833                 count -= c;
1834                 ret += c;
1835         }
1836
1837         return ret;
1838 }