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 ti_device *tdev, unsigned long addr,
 145         __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[14+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 };
 184
 185 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 189         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 190 };
 191
 192 static struct usb_device_id ti_id_table_combined[18+2*TI_EXTRA_VID_PID_COUNT+1] = {
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 194         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 202         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 203         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 206         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 207         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 209         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 210         { USB_DEVICE(ABBOTT_VENDOR_ID, ABBOTT_PRODUCT_ID) },
 211         { }
 212 };
 213
 214 static struct usb_driver ti_usb_driver = {
 215         .name                   = "ti_usb_3410_5052",
 216         .probe                  = usb_serial_probe,
 217         .disconnect             = usb_serial_disconnect,
 218         .id_table               = ti_id_table_combined,
 219 };
 220
 221 static struct usb_serial_driver ti_1port_device = {
 222         .driver = {
 223                 .owner          = THIS_MODULE,
 224                 .name           = "ti_usb_3410_5052_1",
 225         },
 226         .description            = "TI USB 3410 1 port adapter",
 227         .id_table               = ti_id_table_3410,
 228         .num_ports              = 1,
 229         .attach                 = ti_startup,
 230         .release                = ti_release,
 231         .open                   = ti_open,
 232         .close                  = ti_close,
 233         .write                  = ti_write,
 234         .write_room             = ti_write_room,
 235         .chars_in_buffer        = ti_chars_in_buffer,
 236         .throttle               = ti_throttle,
 237         .unthrottle             = ti_unthrottle,
 238         .ioctl                  = ti_ioctl,
 239         .set_termios            = ti_set_termios,
 240         .tiocmget               = ti_tiocmget,
 241         .tiocmset               = ti_tiocmset,
 242         .get_icount             = ti_get_icount,
 243         .break_ctl              = ti_break,
 244         .read_int_callback      = ti_interrupt_callback,
 245         .read_bulk_callback     = ti_bulk_in_callback,
 246         .write_bulk_callback    = ti_bulk_out_callback,
 247 };
 248
 249 static struct usb_serial_driver ti_2port_device = {
 250         .driver = {
 251                 .owner          = THIS_MODULE,
 252                 .name           = "ti_usb_3410_5052_2",
 253         },
 254         .description            = "TI USB 5052 2 port adapter",
 255         .id_table               = ti_id_table_5052,
 256         .num_ports              = 2,
 257         .attach                 = ti_startup,
 258         .release                = ti_release,
 259         .open                   = ti_open,
 260         .close                  = ti_close,
 261         .write                  = ti_write,
 262         .write_room             = ti_write_room,
 263         .chars_in_buffer        = ti_chars_in_buffer,
 264         .throttle               = ti_throttle,
 265         .unthrottle             = ti_unthrottle,
 266         .ioctl                  = ti_ioctl,
 267         .set_termios            = ti_set_termios,
 268         .tiocmget               = ti_tiocmget,
 269         .tiocmset               = ti_tiocmset,
 270         .get_icount             = ti_get_icount,
 271         .break_ctl              = ti_break,
 272         .read_int_callback      = ti_interrupt_callback,
 273         .read_bulk_callback     = ti_bulk_in_callback,
 274         .write_bulk_callback    = ti_bulk_out_callback,
 275 };
 276
 277 static struct usb_serial_driver * const serial_drivers[] = {
 278         &ti_1port_device, &ti_2port_device, NULL
 279 };
 280
 281 /* Module */
 282
 283 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 284 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 285 MODULE_VERSION(TI_DRIVER_VERSION);
 286 MODULE_LICENSE("GPL");
 287
 288 MODULE_FIRMWARE("ti_3410.fw");
 289 MODULE_FIRMWARE("ti_5052.fw");
 290 MODULE_FIRMWARE("mts_cdma.fw");
 291 MODULE_FIRMWARE("mts_gsm.fw");
 292 MODULE_FIRMWARE("mts_edge.fw");
 293 MODULE_FIRMWARE("mts_mt9234mu.fw");
 294 MODULE_FIRMWARE("mts_mt9234zba.fw");
 295
 296 module_param(debug, bool, S_IRUGO | S_IWUSR);
 297 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 298
 299 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 300 MODULE_PARM_DESC(closing_wait,
 301     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 302
 303 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 304 MODULE_PARM_DESC(vendor_3410,
 305                 "Vendor ids for 3410 based devices, 1-5 short integers");
 306 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 307 MODULE_PARM_DESC(product_3410,
 308                 "Product ids for 3410 based devices, 1-5 short integers");
 309 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 310 MODULE_PARM_DESC(vendor_5052,
 311                 "Vendor ids for 5052 based devices, 1-5 short integers");
 312 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 313 MODULE_PARM_DESC(product_5052,
 314                 "Product ids for 5052 based devices, 1-5 short integers");
 315
 316 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 317
 318
 319 /* Functions */
 320
 321 static int __init ti_init(void)
 322 {
 323         int i, j, c;
 324         int ret;
 325
 326         /* insert extra vendor and product ids */
 327         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 328         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 329         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 330                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 331                 ti_id_table_3410[j].idProduct = product_3410[i];
 332                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 333                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 334                 ti_id_table_combined[c].idProduct = product_3410[i];
 335                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 336         }
 337         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 338         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 339                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 340                 ti_id_table_5052[j].idProduct = product_5052[i];
 341                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 342                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 343                 ti_id_table_combined[c].idProduct = product_5052[i];
 344                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 345         }
 346
 347         ret = usb_serial_register_drivers(&ti_usb_driver, serial_drivers);
 348         if (ret == 0)
 349                 printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 350                                TI_DRIVER_DESC "\n");
 351         return ret;
 352 }
 353
 354
 355 static void __exit ti_exit(void)
 356 {
 357         usb_serial_deregister_drivers(&ti_usb_driver, serial_drivers);
 358 }
 359
 360
 361 module_init(ti_init);
 362 module_exit(ti_exit);
 363
 364
 365 static int ti_startup(struct usb_serial *serial)
 366 {
 367         struct ti_device *tdev;
 368         struct ti_port *tport;
 369         struct usb_device *dev = serial->dev;
 370         int status;
 371         int i;
 372
 373
 374         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 375             __func__, le16_to_cpu(dev->descriptor.idProduct),
 376             dev->descriptor.bNumConfigurations,
 377             dev->actconfig->desc.bConfigurationValue);
 378
 379         /* create device structure */
 380         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 381         if (tdev == NULL) {
 382                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 383                 return -ENOMEM;
 384         }
 385         mutex_init(&tdev->td_open_close_lock);
 386         tdev->td_serial = serial;
 387         usb_set_serial_data(serial, tdev);
 388
 389         /* determine device type */
 390         if (usb_match_id(serial->interface, ti_id_table_3410))
 391                 tdev->td_is_3410 = 1;
 392         dbg("%s - device type is %s", __func__,
 393                                 tdev->td_is_3410 ? "3410" : "5052");
 394
 395         /* if we have only 1 configuration, download firmware */
 396         if (dev->descriptor.bNumConfigurations == 1) {
 397                 if ((status = ti_download_firmware(tdev)) != 0)
 398                         goto free_tdev;
 399
 400                 /* 3410 must be reset, 5052 resets itself */
 401                 if (tdev->td_is_3410) {
 402                         msleep_interruptible(100);
 403                         usb_reset_device(dev);
 404                 }
 405
 406                 status = -ENODEV;
 407                 goto free_tdev;
 408         }
 409
 410         /* the second configuration must be set */
 411         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 412                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 413                 status = status ? status : -ENODEV;
 414                 goto free_tdev;
 415         }
 416
 417         /* set up port structures */
 418         for (i = 0; i < serial->num_ports; ++i) {
 419                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 420                 if (tport == NULL) {
 421                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 422                         status = -ENOMEM;
 423                         goto free_tports;
 424                 }
 425                 spin_lock_init(&tport->tp_lock);
 426                 tport->tp_uart_base_addr = (i == 0 ?
 427                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 428                 tport->tp_closing_wait = closing_wait;
 429                 init_waitqueue_head(&tport->tp_msr_wait);
 430                 init_waitqueue_head(&tport->tp_write_wait);
 431                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 432                                                                 GFP_KERNEL)) {
 433                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 434                         kfree(tport);
 435                         status = -ENOMEM;
 436                         goto free_tports;
 437                 }
 438                 tport->tp_port = serial->port[i];
 439                 tport->tp_tdev = tdev;
 440                 usb_set_serial_port_data(serial->port[i], tport);
 441                 tport->tp_uart_mode = 0;        /* default is RS232 */
 442         }
 443
 444         return 0;
 445
 446 free_tports:
 447         for (--i; i >= 0; --i) {
 448                 tport = usb_get_serial_port_data(serial->port[i]);
 449                 kfifo_free(&tport->write_fifo);
 450                 kfree(tport);
 451                 usb_set_serial_port_data(serial->port[i], NULL);
 452         }
 453 free_tdev:
 454         kfree(tdev);
 455         usb_set_serial_data(serial, NULL);
 456         return status;
 457 }
 458
 459
 460 static void ti_release(struct usb_serial *serial)
 461 {
 462         int i;
 463         struct ti_device *tdev = usb_get_serial_data(serial);
 464         struct ti_port *tport;
 465
 466         dbg("%s", __func__);
 467
 468         for (i = 0; i < serial->num_ports; ++i) {
 469                 tport = usb_get_serial_port_data(serial->port[i]);
 470                 if (tport) {
 471                         kfifo_free(&tport->write_fifo);
 472                         kfree(tport);
 473                 }
 474         }
 475
 476         kfree(tdev);
 477 }
 478
 479
 480 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 481 {
 482         struct ti_port *tport = usb_get_serial_port_data(port);
 483         struct ti_device *tdev;
 484         struct usb_device *dev;
 485         struct urb *urb;
 486         int port_number;
 487         int status;
 488         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 489                              TI_PIPE_TIMEOUT_ENABLE |
 490                              (TI_TRANSFER_TIMEOUT << 2));
 491
 492         dbg("%s - port %d", __func__, port->number);
 493
 494         if (tport == NULL)
 495                 return -ENODEV;
 496
 497         dev = port->serial->dev;
 498         tdev = tport->tp_tdev;
 499
 500         /* only one open on any port on a device at a time */
 501         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 502                 return -ERESTARTSYS;
 503
 504         port_number = port->number - port->serial->minor;
 505
 506         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 507
 508         tport->tp_msr = 0;
 509         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 510
 511         /* start interrupt urb the first time a port is opened on this device */
 512         if (tdev->td_open_port_count == 0) {
 513                 dbg("%s - start interrupt in urb", __func__);
 514                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 515                 if (!urb) {
 516                         dev_err(&port->dev, "%s - no interrupt urb\n",
 517                                                                 __func__);
 518                         status = -EINVAL;
 519                         goto release_lock;
 520                 }
 521                 urb->context = tdev;
 522                 status = usb_submit_urb(urb, GFP_KERNEL);
 523                 if (status) {
 524                         dev_err(&port->dev,
 525                                 "%s - submit interrupt urb failed, %d\n",
 526                                         __func__, status);
 527                         goto release_lock;
 528                 }
 529         }
 530
 531         if (tty)
 532                 ti_set_termios(tty, port, tty->termios);
 533
 534         dbg("%s - sending TI_OPEN_PORT", __func__);
 535         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 536                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 537         if (status) {
 538                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 539                                                         __func__, status);
 540                 goto unlink_int_urb;
 541         }
 542
 543         dbg("%s - sending TI_START_PORT", __func__);
 544         status = ti_command_out_sync(tdev, TI_START_PORT,
 545                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 546         if (status) {
 547                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 548                                                         __func__, status);
 549                 goto unlink_int_urb;
 550         }
 551
 552         dbg("%s - sending TI_PURGE_PORT", __func__);
 553         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 554                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 555         if (status) {
 556                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 557                                                         __func__, status);
 558                 goto unlink_int_urb;
 559         }
 560         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 561                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 562         if (status) {
 563                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 564                                                         __func__, status);
 565                 goto unlink_int_urb;
 566         }
 567
 568         /* reset the data toggle on the bulk endpoints to work around bug in
 569          * host controllers where things get out of sync some times */
 570         usb_clear_halt(dev, port->write_urb->pipe);
 571         usb_clear_halt(dev, port->read_urb->pipe);
 572
 573         if (tty)
 574                 ti_set_termios(tty, port, tty->termios);
 575
 576         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 577         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 578                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 579         if (status) {
 580                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 581                                                         __func__, status);
 582                 goto unlink_int_urb;
 583         }
 584
 585         dbg("%s - sending TI_START_PORT (2)", __func__);
 586         status = ti_command_out_sync(tdev, TI_START_PORT,
 587                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 588         if (status) {
 589                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 590                                                         __func__, status);
 591                 goto unlink_int_urb;
 592         }
 593
 594         /* start read urb */
 595         dbg("%s - start read urb", __func__);
 596         urb = port->read_urb;
 597         if (!urb) {
 598                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 599                 status = -EINVAL;
 600                 goto unlink_int_urb;
 601         }
 602         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 603         urb->context = tport;
 604         status = usb_submit_urb(urb, GFP_KERNEL);
 605         if (status) {
 606                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 607                                                         __func__, status);
 608                 goto unlink_int_urb;
 609         }
 610
 611         tport->tp_is_open = 1;
 612         ++tdev->td_open_port_count;
 613
 614         goto release_lock;
 615
 616 unlink_int_urb:
 617         if (tdev->td_open_port_count == 0)
 618                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 619 release_lock:
 620         mutex_unlock(&tdev->td_open_close_lock);
 621         dbg("%s - exit %d", __func__, status);
 622         return status;
 623 }
 624
 625
 626 static void ti_close(struct usb_serial_port *port)
 627 {
 628         struct ti_device *tdev;
 629         struct ti_port *tport;
 630         int port_number;
 631         int status;
 632         int do_unlock;
 633
 634         dbg("%s - port %d", __func__, port->number);
 635
 636         tdev = usb_get_serial_data(port->serial);
 637         tport = usb_get_serial_port_data(port);
 638         if (tdev == NULL || tport == NULL)
 639                 return;
 640
 641         tport->tp_is_open = 0;
 642
 643         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 644
 645         usb_kill_urb(port->read_urb);
 646         usb_kill_urb(port->write_urb);
 647         tport->tp_write_urb_in_use = 0;
 648
 649         port_number = port->number - port->serial->minor;
 650
 651         dbg("%s - sending TI_CLOSE_PORT", __func__);
 652         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 653                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 654         if (status)
 655                 dev_err(&port->dev,
 656                         "%s - cannot send close port command, %d\n"
 657                                                         , __func__, status);
 658
 659         /* if mutex_lock is interrupted, continue anyway */
 660         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 661         --tport->tp_tdev->td_open_port_count;
 662         if (tport->tp_tdev->td_open_port_count <= 0) {
 663                 /* last port is closed, shut down interrupt urb */
 664                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 665                 tport->tp_tdev->td_open_port_count = 0;
 666         }
 667         if (do_unlock)
 668                 mutex_unlock(&tdev->td_open_close_lock);
 669
 670         dbg("%s - exit", __func__);
 671 }
 672
 673
 674 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 675                         const unsigned char *data, int count)
 676 {
 677         struct ti_port *tport = usb_get_serial_port_data(port);
 678
 679         dbg("%s - port %d", __func__, port->number);
 680
 681         if (count == 0) {
 682                 dbg("%s - write request of 0 bytes", __func__);
 683                 return 0;
 684         }
 685
 686         if (tport == NULL || !tport->tp_is_open)
 687                 return -ENODEV;
 688
 689         count = kfifo_in_locked(&tport->write_fifo, data, count,
 690                                                         &tport->tp_lock);
 691         ti_send(tport);
 692
 693         return count;
 694 }
 695
 696
 697 static int ti_write_room(struct tty_struct *tty)
 698 {
 699         struct usb_serial_port *port = tty->driver_data;
 700         struct ti_port *tport = usb_get_serial_port_data(port);
 701         int room = 0;
 702         unsigned long flags;
 703
 704         dbg("%s - port %d", __func__, port->number);
 705
 706         if (tport == NULL)
 707                 return 0;
 708
 709         spin_lock_irqsave(&tport->tp_lock, flags);
 710         room = kfifo_avail(&tport->write_fifo);
 711         spin_unlock_irqrestore(&tport->tp_lock, flags);
 712
 713         dbg("%s - returns %d", __func__, room);
 714         return room;
 715 }
 716
 717
 718 static int ti_chars_in_buffer(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         int chars = 0;
 723         unsigned long flags;
 724
 725         dbg("%s - port %d", __func__, port->number);
 726
 727         if (tport == NULL)
 728                 return 0;
 729
 730         spin_lock_irqsave(&tport->tp_lock, flags);
 731         chars = kfifo_len(&tport->write_fifo);
 732         spin_unlock_irqrestore(&tport->tp_lock, flags);
 733
 734         dbg("%s - returns %d", __func__, chars);
 735         return chars;
 736 }
 737
 738
 739 static void ti_throttle(struct tty_struct *tty)
 740 {
 741         struct usb_serial_port *port = tty->driver_data;
 742         struct ti_port *tport = usb_get_serial_port_data(port);
 743
 744         dbg("%s - port %d", __func__, port->number);
 745
 746         if (tport == NULL)
 747                 return;
 748
 749         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 750                 ti_stop_read(tport, tty);
 751
 752 }
 753
 754
 755 static void ti_unthrottle(struct tty_struct *tty)
 756 {
 757         struct usb_serial_port *port = tty->driver_data;
 758         struct ti_port *tport = usb_get_serial_port_data(port);
 759         int status;
 760
 761         dbg("%s - port %d", __func__, port->number);
 762
 763         if (tport == NULL)
 764                 return;
 765
 766         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 767                 status = ti_restart_read(tport, tty);
 768                 if (status)
 769                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 770                                                         __func__, status);
 771         }
 772 }
 773
 774 static int ti_get_icount(struct tty_struct *tty,
 775                 struct serial_icounter_struct *icount)
 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 = tport->tp_icount;
 780
 781         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 782                 __func__, port->number,
 783                 cnow.rx, cnow.tx);
 784
 785         icount->cts = cnow.cts;
 786         icount->dsr = cnow.dsr;
 787         icount->rng = cnow.rng;
 788         icount->dcd = cnow.dcd;
 789         icount->rx = cnow.rx;
 790         icount->tx = cnow.tx;
 791         icount->frame = cnow.frame;
 792         icount->overrun = cnow.overrun;
 793         icount->parity = cnow.parity;
 794         icount->brk = cnow.brk;
 795         icount->buf_overrun = cnow.buf_overrun;
 796
 797         return 0;
 798 }
 799
 800 static int ti_ioctl(struct tty_struct *tty,
 801         unsigned int cmd, unsigned long arg)
 802 {
 803         struct usb_serial_port *port = tty->driver_data;
 804         struct ti_port *tport = usb_get_serial_port_data(port);
 805         struct async_icount cnow;
 806         struct async_icount cprev;
 807
 808         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 809
 810         if (tport == NULL)
 811                 return -ENODEV;
 812
 813         switch (cmd) {
 814         case TIOCGSERIAL:
 815                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 816                 return ti_get_serial_info(tport,
 817                                 (struct serial_struct __user *)arg);
 818         case TIOCSSERIAL:
 819                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 820                 return ti_set_serial_info(tty, tport,
 821                                 (struct serial_struct __user *)arg);
 822         case TIOCMIWAIT:
 823                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 824                 cprev = tport->tp_icount;
 825                 while (1) {
 826                         interruptible_sleep_on(&tport->tp_msr_wait);
 827                         if (signal_pending(current))
 828                                 return -ERESTARTSYS;
 829                         cnow = tport->tp_icount;
 830                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 831                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 832                                 return -EIO; /* no change => error */
 833                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 834                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 835                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 836                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 837                                 return 0;
 838                         cprev = cnow;
 839                 }
 840                 break;
 841         }
 842         return -ENOIOCTLCMD;
 843 }
 844
 845
 846 static void ti_set_termios(struct tty_struct *tty,
 847                 struct usb_serial_port *port, struct ktermios *old_termios)
 848 {
 849         struct ti_port *tport = usb_get_serial_port_data(port);
 850         struct ti_uart_config *config;
 851         tcflag_t cflag, iflag;
 852         int baud;
 853         int status;
 854         int port_number = port->number - port->serial->minor;
 855         unsigned int mcr;
 856
 857         dbg("%s - port %d", __func__, port->number);
 858
 859         cflag = tty->termios->c_cflag;
 860         iflag = tty->termios->c_iflag;
 861
 862         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 863         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 864                                 old_termios->c_cflag, old_termios->c_iflag);
 865
 866         if (tport == NULL)
 867                 return;
 868
 869         config = kmalloc(sizeof(*config), GFP_KERNEL);
 870         if (!config) {
 871                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 872                 return;
 873         }
 874
 875         config->wFlags = 0;
 876
 877         /* these flags must be set */
 878         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 879         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 880         config->bUartMode = (__u8)(tport->tp_uart_mode);
 881
 882         switch (cflag & CSIZE) {
 883         case CS5:
 884                     config->bDataBits = TI_UART_5_DATA_BITS;
 885                     break;
 886         case CS6:
 887                     config->bDataBits = TI_UART_6_DATA_BITS;
 888                     break;
 889         case CS7:
 890                     config->bDataBits = TI_UART_7_DATA_BITS;
 891                     break;
 892         default:
 893         case CS8:
 894                     config->bDataBits = TI_UART_8_DATA_BITS;
 895                     break;
 896         }
 897
 898         /* CMSPAR isn't supported by this driver */
 899         tty->termios->c_cflag &= ~CMSPAR;
 900
 901         if (cflag & PARENB) {
 902                 if (cflag & PARODD) {
 903                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 904                         config->bParity = TI_UART_ODD_PARITY;
 905                 } else {
 906                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 907                         config->bParity = TI_UART_EVEN_PARITY;
 908                 }
 909         } else {
 910                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 911                 config->bParity = TI_UART_NO_PARITY;
 912         }
 913
 914         if (cflag & CSTOPB)
 915                 config->bStopBits = TI_UART_2_STOP_BITS;
 916         else
 917                 config->bStopBits = TI_UART_1_STOP_BITS;
 918
 919         if (cflag & CRTSCTS) {
 920                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 921                 if ((cflag & CBAUD) != B0)
 922                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 923                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 924         } else {
 925                 tty->hw_stopped = 0;
 926                 ti_restart_read(tport, tty);
 927         }
 928
 929         if (I_IXOFF(tty) || I_IXON(tty)) {
 930                 config->cXon  = START_CHAR(tty);
 931                 config->cXoff = STOP_CHAR(tty);
 932
 933                 if (I_IXOFF(tty))
 934                         config->wFlags |= TI_UART_ENABLE_X_IN;
 935                 else
 936                         ti_restart_read(tport, tty);
 937
 938                 if (I_IXON(tty))
 939                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 940         }
 941
 942         baud = tty_get_baud_rate(tty);
 943         if (!baud)
 944                 baud = 9600;
 945         if (tport->tp_tdev->td_is_3410)
 946                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 947         else
 948                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 949
 950         /* FIXME: Should calculate resulting baud here and report it back */
 951         if ((cflag & CBAUD) != B0)
 952                 tty_encode_baud_rate(tty, baud, baud);
 953
 954         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 955         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 956
 957         cpu_to_be16s(&config->wBaudRate);
 958         cpu_to_be16s(&config->wFlags);
 959
 960         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 961                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 962                 sizeof(*config));
 963         if (status)
 964                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 965                                         __func__, port_number, status);
 966
 967         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 968         mcr = tport->tp_shadow_mcr;
 969         /* if baud rate is B0, clear RTS and DTR */
 970         if ((cflag & CBAUD) == B0)
 971                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 972         status = ti_set_mcr(tport, mcr);
 973         if (status)
 974                 dev_err(&port->dev,
 975                         "%s - cannot set modem control on port %d, %d\n",
 976                                                 __func__, port_number, status);
 977
 978         kfree(config);
 979 }
 980
 981
 982 static int ti_tiocmget(struct tty_struct *tty)
 983 {
 984         struct usb_serial_port *port = tty->driver_data;
 985         struct ti_port *tport = usb_get_serial_port_data(port);
 986         unsigned int result;
 987         unsigned int msr;
 988         unsigned int mcr;
 989         unsigned long flags;
 990
 991         dbg("%s - port %d", __func__, port->number);
 992
 993         if (tport == NULL)
 994                 return -ENODEV;
 995
 996         spin_lock_irqsave(&tport->tp_lock, flags);
 997         msr = tport->tp_msr;
 998         mcr = tport->tp_shadow_mcr;
 999         spin_unlock_irqrestore(&tport->tp_lock, flags);
1000
1001         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1002                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1003                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1004                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1005                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1006                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1007                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1008
1009         dbg("%s - 0x%04X", __func__, result);
1010
1011         return result;
1012 }
1013
1014
1015 static int ti_tiocmset(struct tty_struct *tty,
1016                                 unsigned int set, unsigned int clear)
1017 {
1018         struct usb_serial_port *port = tty->driver_data;
1019         struct ti_port *tport = usb_get_serial_port_data(port);
1020         unsigned int mcr;
1021         unsigned long flags;
1022
1023         dbg("%s - port %d", __func__, port->number);
1024
1025         if (tport == NULL)
1026                 return -ENODEV;
1027
1028         spin_lock_irqsave(&tport->tp_lock, flags);
1029         mcr = tport->tp_shadow_mcr;
1030
1031         if (set & TIOCM_RTS)
1032                 mcr |= TI_MCR_RTS;
1033         if (set & TIOCM_DTR)
1034                 mcr |= TI_MCR_DTR;
1035         if (set & TIOCM_LOOP)
1036                 mcr |= TI_MCR_LOOP;
1037
1038         if (clear & TIOCM_RTS)
1039                 mcr &= ~TI_MCR_RTS;
1040         if (clear & TIOCM_DTR)
1041                 mcr &= ~TI_MCR_DTR;
1042         if (clear & TIOCM_LOOP)
1043                 mcr &= ~TI_MCR_LOOP;
1044         spin_unlock_irqrestore(&tport->tp_lock, flags);
1045
1046         return ti_set_mcr(tport, mcr);
1047 }
1048
1049
1050 static void ti_break(struct tty_struct *tty, int break_state)
1051 {
1052         struct usb_serial_port *port = tty->driver_data;
1053         struct ti_port *tport = usb_get_serial_port_data(port);
1054         int status;
1055
1056         dbg("%s - state = %d", __func__, break_state);
1057
1058         if (tport == NULL)
1059                 return;
1060
1061         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1062
1063         status = ti_write_byte(tport->tp_tdev,
1064                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1065                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1066
1067         if (status)
1068                 dbg("%s - error setting break, %d", __func__, status);
1069 }
1070
1071
1072 static void ti_interrupt_callback(struct urb *urb)
1073 {
1074         struct ti_device *tdev = urb->context;
1075         struct usb_serial_port *port;
1076         struct usb_serial *serial = tdev->td_serial;
1077         struct ti_port *tport;
1078         struct device *dev = &urb->dev->dev;
1079         unsigned char *data = urb->transfer_buffer;
1080         int length = urb->actual_length;
1081         int port_number;
1082         int function;
1083         int status = urb->status;
1084         int retval;
1085         __u8 msr;
1086
1087         dbg("%s", __func__);
1088
1089         switch (status) {
1090         case 0:
1091                 break;
1092         case -ECONNRESET:
1093         case -ENOENT:
1094         case -ESHUTDOWN:
1095                 dbg("%s - urb shutting down, %d", __func__, status);
1096                 tdev->td_urb_error = 1;
1097                 return;
1098         default:
1099                 dev_err(dev, "%s - nonzero urb status, %d\n",
1100                         __func__, status);
1101                 tdev->td_urb_error = 1;
1102                 goto exit;
1103         }
1104
1105         if (length != 2) {
1106                 dbg("%s - bad packet size, %d", __func__, length);
1107                 goto exit;
1108         }
1109
1110         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1111                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1112                 goto exit;
1113         }
1114
1115         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1116         function = TI_GET_FUNC_FROM_CODE(data[0]);
1117
1118         dbg("%s - port_number %d, function %d, data 0x%02X",
1119                                 __func__, port_number, function, data[1]);
1120
1121         if (port_number >= serial->num_ports) {
1122                 dev_err(dev, "%s - bad port number, %d\n",
1123                                                 __func__, port_number);
1124                 goto exit;
1125         }
1126
1127         port = serial->port[port_number];
1128
1129         tport = usb_get_serial_port_data(port);
1130         if (!tport)
1131                 goto exit;
1132
1133         switch (function) {
1134         case TI_CODE_DATA_ERROR:
1135                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1136                                         __func__, port_number, data[1]);
1137                 break;
1138
1139         case TI_CODE_MODEM_STATUS:
1140                 msr = data[1];
1141                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1142                 ti_handle_new_msr(tport, msr);
1143                 break;
1144
1145         default:
1146                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1147                                                         __func__, data[1]);
1148                 break;
1149         }
1150
1151 exit:
1152         retval = usb_submit_urb(urb, GFP_ATOMIC);
1153         if (retval)
1154                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1155                         __func__, retval);
1156 }
1157
1158
1159 static void ti_bulk_in_callback(struct urb *urb)
1160 {
1161         struct ti_port *tport = urb->context;
1162         struct usb_serial_port *port = tport->tp_port;
1163         struct device *dev = &urb->dev->dev;
1164         int status = urb->status;
1165         int retval = 0;
1166         struct tty_struct *tty;
1167
1168         dbg("%s", __func__);
1169
1170         switch (status) {
1171         case 0:
1172                 break;
1173         case -ECONNRESET:
1174         case -ENOENT:
1175         case -ESHUTDOWN:
1176                 dbg("%s - urb shutting down, %d", __func__, status);
1177                 tport->tp_tdev->td_urb_error = 1;
1178                 wake_up_interruptible(&tport->tp_write_wait);
1179                 return;
1180         default:
1181                 dev_err(dev, "%s - nonzero urb status, %d\n",
1182                         __func__, status);
1183                 tport->tp_tdev->td_urb_error = 1;
1184                 wake_up_interruptible(&tport->tp_write_wait);
1185         }
1186
1187         if (status == -EPIPE)
1188                 goto exit;
1189
1190         if (status) {
1191                 dev_err(dev, "%s - stopping read!\n", __func__);
1192                 return;
1193         }
1194
1195         tty = tty_port_tty_get(&port->port);
1196         if (tty) {
1197                 if (urb->actual_length) {
1198                         usb_serial_debug_data(debug, dev, __func__,
1199                                 urb->actual_length, urb->transfer_buffer);
1200
1201                         if (!tport->tp_is_open)
1202                                 dbg("%s - port closed, dropping data",
1203                                         __func__);
1204                         else
1205                                 ti_recv(&urb->dev->dev, tty,
1206                                                 urb->transfer_buffer,
1207                                                 urb->actual_length);
1208                         spin_lock(&tport->tp_lock);
1209                         tport->tp_icount.rx += urb->actual_length;
1210                         spin_unlock(&tport->tp_lock);
1211                 }
1212                 tty_kref_put(tty);
1213         }
1214
1215 exit:
1216         /* continue to read unless stopping */
1217         spin_lock(&tport->tp_lock);
1218         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1219                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1220         else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING)
1221                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1222
1223         spin_unlock(&tport->tp_lock);
1224         if (retval)
1225                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1226                         __func__, retval);
1227 }
1228
1229
1230 static void ti_bulk_out_callback(struct urb *urb)
1231 {
1232         struct ti_port *tport = urb->context;
1233         struct usb_serial_port *port = tport->tp_port;
1234         int status = urb->status;
1235
1236         dbg("%s - port %d", __func__, port->number);
1237
1238         tport->tp_write_urb_in_use = 0;
1239
1240         switch (status) {
1241         case 0:
1242                 break;
1243         case -ECONNRESET:
1244         case -ENOENT:
1245         case -ESHUTDOWN:
1246                 dbg("%s - urb shutting down, %d", __func__, status);
1247                 tport->tp_tdev->td_urb_error = 1;
1248                 wake_up_interruptible(&tport->tp_write_wait);
1249                 return;
1250         default:
1251                 dev_err_console(port, "%s - nonzero urb status, %d\n",
1252                         __func__, status);
1253                 tport->tp_tdev->td_urb_error = 1;
1254                 wake_up_interruptible(&tport->tp_write_wait);
1255         }
1256
1257         /* send any buffered data */
1258         ti_send(tport);
1259 }
1260
1261
1262 static void ti_recv(struct device *dev, struct tty_struct *tty,
1263         unsigned char *data, int length)
1264 {
1265         int cnt;
1266
1267         do {
1268                 cnt = tty_insert_flip_string(tty, data, length);
1269                 if (cnt < length) {
1270                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1271                                                 __func__, length - cnt);
1272                         if (cnt == 0)
1273                                 break;
1274                 }
1275                 tty_flip_buffer_push(tty);
1276                 data += cnt;
1277                 length -= cnt;
1278         } while (length > 0);
1279
1280 }
1281
1282
1283 static void ti_send(struct ti_port *tport)
1284 {
1285         int count, result;
1286         struct usb_serial_port *port = tport->tp_port;
1287         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1288         unsigned long flags;
1289
1290
1291         dbg("%s - port %d", __func__, port->number);
1292
1293         spin_lock_irqsave(&tport->tp_lock, flags);
1294
1295         if (tport->tp_write_urb_in_use)
1296                 goto unlock;
1297
1298         count = kfifo_out(&tport->write_fifo,
1299                                 port->write_urb->transfer_buffer,
1300                                 port->bulk_out_size);
1301
1302         if (count == 0)
1303                 goto unlock;
1304
1305         tport->tp_write_urb_in_use = 1;
1306
1307         spin_unlock_irqrestore(&tport->tp_lock, flags);
1308
1309         usb_serial_debug_data(debug, &port->dev, __func__, count,
1310                                         port->write_urb->transfer_buffer);
1311
1312         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1313                            usb_sndbulkpipe(port->serial->dev,
1314                                             port->bulk_out_endpointAddress),
1315                            port->write_urb->transfer_buffer, count,
1316                            ti_bulk_out_callback, tport);
1317
1318         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1319         if (result) {
1320                 dev_err_console(port, "%s - submit write urb failed, %d\n",
1321                                                         __func__, result);
1322                 tport->tp_write_urb_in_use = 0;
1323                 /* TODO: reschedule ti_send */
1324         } else {
1325                 spin_lock_irqsave(&tport->tp_lock, flags);
1326                 tport->tp_icount.tx += count;
1327                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1328         }
1329
1330         /* more room in the buffer for new writes, wakeup */
1331         if (tty)
1332                 tty_wakeup(tty);
1333         tty_kref_put(tty);
1334         wake_up_interruptible(&tport->tp_write_wait);
1335         return;
1336 unlock:
1337         spin_unlock_irqrestore(&tport->tp_lock, flags);
1338         tty_kref_put(tty);
1339         return;
1340 }
1341
1342
1343 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1344 {
1345         unsigned long flags;
1346         int status;
1347
1348         status = ti_write_byte(tport->tp_tdev,
1349                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1350                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1351
1352         spin_lock_irqsave(&tport->tp_lock, flags);
1353         if (!status)
1354                 tport->tp_shadow_mcr = mcr;
1355         spin_unlock_irqrestore(&tport->tp_lock, flags);
1356
1357         return status;
1358 }
1359
1360
1361 static int ti_get_lsr(struct ti_port *tport)
1362 {
1363         int size, status;
1364         struct ti_device *tdev = tport->tp_tdev;
1365         struct usb_serial_port *port = tport->tp_port;
1366         int port_number = port->number - port->serial->minor;
1367         struct ti_port_status *data;
1368
1369         dbg("%s - port %d", __func__, port->number);
1370
1371         size = sizeof(struct ti_port_status);
1372         data = kmalloc(size, GFP_KERNEL);
1373         if (!data) {
1374                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1375                 return -ENOMEM;
1376         }
1377
1378         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1379                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1380         if (status) {
1381                 dev_err(&port->dev,
1382                         "%s - get port status command failed, %d\n",
1383                                                         __func__, status);
1384                 goto free_data;
1385         }
1386
1387         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1388
1389         tport->tp_lsr = data->bLSR;
1390
1391 free_data:
1392         kfree(data);
1393         return status;
1394 }
1395
1396
1397 static int ti_get_serial_info(struct ti_port *tport,
1398         struct serial_struct __user *ret_arg)
1399 {
1400         struct usb_serial_port *port = tport->tp_port;
1401         struct serial_struct ret_serial;
1402
1403         if (!ret_arg)
1404                 return -EFAULT;
1405
1406         memset(&ret_serial, 0, sizeof(ret_serial));
1407
1408         ret_serial.type = PORT_16550A;
1409         ret_serial.line = port->serial->minor;
1410         ret_serial.port = port->number - port->serial->minor;
1411         ret_serial.flags = tport->tp_flags;
1412         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1413         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1414         ret_serial.closing_wait = tport->tp_closing_wait;
1415
1416         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1417                 return -EFAULT;
1418
1419         return 0;
1420 }
1421
1422
1423 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1424         struct serial_struct __user *new_arg)
1425 {
1426         struct serial_struct new_serial;
1427
1428         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1429                 return -EFAULT;
1430
1431         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1432         tport->tp_closing_wait = new_serial.closing_wait;
1433
1434         return 0;
1435 }
1436
1437
1438 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1439 {
1440         struct async_icount *icount;
1441         struct tty_struct *tty;
1442         unsigned long flags;
1443
1444         dbg("%s - msr 0x%02X", __func__, msr);
1445
1446         if (msr & TI_MSR_DELTA_MASK) {
1447                 spin_lock_irqsave(&tport->tp_lock, flags);
1448                 icount = &tport->tp_icount;
1449                 if (msr & TI_MSR_DELTA_CTS)
1450                         icount->cts++;
1451                 if (msr & TI_MSR_DELTA_DSR)
1452                         icount->dsr++;
1453                 if (msr & TI_MSR_DELTA_CD)
1454                         icount->dcd++;
1455                 if (msr & TI_MSR_DELTA_RI)
1456                         icount->rng++;
1457                 wake_up_interruptible(&tport->tp_msr_wait);
1458                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1459         }
1460
1461         tport->tp_msr = msr & TI_MSR_MASK;
1462
1463         /* handle CTS flow control */
1464         tty = tty_port_tty_get(&tport->tp_port->port);
1465         if (tty && C_CRTSCTS(tty)) {
1466                 if (msr & TI_MSR_CTS) {
1467                         tty->hw_stopped = 0;
1468                         tty_wakeup(tty);
1469                 } else {
1470                         tty->hw_stopped = 1;
1471                 }
1472         }
1473         tty_kref_put(tty);
1474 }
1475
1476
1477 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1478 {
1479         struct ti_device *tdev = tport->tp_tdev;
1480         struct usb_serial_port *port = tport->tp_port;
1481         wait_queue_t wait;
1482
1483         dbg("%s - port %d", __func__, port->number);
1484
1485         spin_lock_irq(&tport->tp_lock);
1486
1487         /* wait for data to drain from the buffer */
1488         tdev->td_urb_error = 0;
1489         init_waitqueue_entry(&wait, current);
1490         add_wait_queue(&tport->tp_write_wait, &wait);
1491         for (;;) {
1492                 set_current_state(TASK_INTERRUPTIBLE);
1493                 if (kfifo_len(&tport->write_fifo) == 0
1494                 || timeout == 0 || signal_pending(current)
1495                 || tdev->td_urb_error
1496                 || port->serial->disconnected)  /* disconnect */
1497                         break;
1498                 spin_unlock_irq(&tport->tp_lock);
1499                 timeout = schedule_timeout(timeout);
1500                 spin_lock_irq(&tport->tp_lock);
1501         }
1502         set_current_state(TASK_RUNNING);
1503         remove_wait_queue(&tport->tp_write_wait, &wait);
1504
1505         /* flush any remaining data in the buffer */
1506         if (flush)
1507                 kfifo_reset_out(&tport->write_fifo);
1508
1509         spin_unlock_irq(&tport->tp_lock);
1510
1511         mutex_lock(&port->serial->disc_mutex);
1512         /* wait for data to drain from the device */
1513         /* wait for empty tx register, plus 20 ms */
1514         timeout += jiffies;
1515         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1516         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1517         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1518         && !port->serial->disconnected) {
1519                 if (ti_get_lsr(tport))
1520                         break;
1521                 mutex_unlock(&port->serial->disc_mutex);
1522                 msleep_interruptible(20);
1523                 mutex_lock(&port->serial->disc_mutex);
1524         }
1525         mutex_unlock(&port->serial->disc_mutex);
1526 }
1527
1528
1529 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1530 {
1531         unsigned long flags;
1532
1533         spin_lock_irqsave(&tport->tp_lock, flags);
1534
1535         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1536                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1537
1538         spin_unlock_irqrestore(&tport->tp_lock, flags);
1539 }
1540
1541
1542 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1543 {
1544         struct urb *urb;
1545         int status = 0;
1546         unsigned long flags;
1547
1548         spin_lock_irqsave(&tport->tp_lock, flags);
1549
1550         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1551                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1552                 urb = tport->tp_port->read_urb;
1553                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1554                 urb->context = tport;
1555                 status = usb_submit_urb(urb, GFP_KERNEL);
1556         } else  {
1557                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1558                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1559         }
1560
1561         return status;
1562 }
1563
1564
1565 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1566         __u16 moduleid, __u16 value, __u8 *data, int size)
1567 {
1568         int status;
1569
1570         status = usb_control_msg(tdev->td_serial->dev,
1571                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1572                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1573                 value, moduleid, data, size, 1000);
1574
1575         if (status == size)
1576                 status = 0;
1577
1578         if (status > 0)
1579                 status = -ECOMM;
1580
1581         return status;
1582 }
1583
1584
1585 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1586         __u16 moduleid, __u16 value, __u8 *data, int size)
1587 {
1588         int status;
1589
1590         status = usb_control_msg(tdev->td_serial->dev,
1591                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1592                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1593                 value, moduleid, data, size, 1000);
1594
1595         if (status == size)
1596                 status = 0;
1597
1598         if (status > 0)
1599                 status = -ECOMM;
1600
1601         return status;
1602 }
1603
1604
1605 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1606         __u8 mask, __u8 byte)
1607 {
1608         int status;
1609         unsigned int size;
1610         struct ti_write_data_bytes *data;
1611         struct device *dev = &tdev->td_serial->dev->dev;
1612
1613         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1614                                         __func__, addr, mask, byte);
1615
1616         size = sizeof(struct ti_write_data_bytes) + 2;
1617         data = kmalloc(size, GFP_KERNEL);
1618         if (!data) {
1619                 dev_err(dev, "%s - out of memory\n", __func__);
1620                 return -ENOMEM;
1621         }
1622
1623         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1624         data->bDataType = TI_RW_DATA_BYTE;
1625         data->bDataCounter = 1;
1626         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1627         data->wBaseAddrLo = cpu_to_be16(addr);
1628         data->bData[0] = mask;
1629         data->bData[1] = byte;
1630
1631         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1632                 (__u8 *)data, size);
1633
1634         if (status < 0)
1635                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1636
1637         kfree(data);
1638
1639         return status;
1640 }
1641
1642 static int ti_do_download(struct usb_device *dev, int pipe,
1643                                                 u8 *buffer, int size)
1644 {
1645         int pos;
1646         u8 cs = 0;
1647         int done;
1648         struct ti_firmware_header *header;
1649         int status = 0;
1650         int len;
1651
1652         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1653                 cs = (__u8)(cs + buffer[pos]);
1654
1655         header = (struct ti_firmware_header *)buffer;
1656         header->wLength = cpu_to_le16((__u16)(size
1657                                         - sizeof(struct ti_firmware_header)));
1658         header->bCheckSum = cs;
1659
1660         dbg("%s - downloading firmware", __func__);
1661         for (pos = 0; pos < size; pos += done) {
1662                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1663                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1664                                                                 &done, 1000);
1665                 if (status)
1666                         break;
1667         }
1668         return status;
1669 }
1670
1671 static int ti_download_firmware(struct ti_device *tdev)
1672 {
1673         int status;
1674         int buffer_size;
1675         __u8 *buffer;
1676         struct usb_device *dev = tdev->td_serial->dev;
1677         unsigned int pipe = usb_sndbulkpipe(dev,
1678                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1679         const struct firmware *fw_p;
1680         char buf[32];
1681
1682         dbg("%s\n", __func__);
1683         /* try ID specific firmware first, then try generic firmware */
1684         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1685             dev->descriptor.idProduct);
1686         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1687                 buf[0] = '\0';
1688                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1689                         switch (dev->descriptor.idProduct) {
1690                         case MTS_CDMA_PRODUCT_ID:
1691                                 strcpy(buf, "mts_cdma.fw");
1692                                 break;
1693                         case MTS_GSM_PRODUCT_ID:
1694                                 strcpy(buf, "mts_gsm.fw");
1695                                 break;
1696                         case MTS_EDGE_PRODUCT_ID:
1697                                 strcpy(buf, "mts_edge.fw");
1698                                 break;
1699                         case MTS_MT9234MU_PRODUCT_ID:
1700                                 strcpy(buf, "mts_mt9234mu.fw");
1701                                 break;
1702                         case MTS_MT9234ZBA_PRODUCT_ID:
1703                                 strcpy(buf, "mts_mt9234zba.fw");
1704                                 break;
1705                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1706                                 strcpy(buf, "mts_mt9234zba.fw");
1707                                 break;                  }
1708                 }
1709                 if (buf[0] == '\0') {
1710                         if (tdev->td_is_3410)
1711                                 strcpy(buf, "ti_3410.fw");
1712                         else
1713                                 strcpy(buf, "ti_5052.fw");
1714                 }
1715                 status = request_firmware(&fw_p, buf, &dev->dev);
1716         }
1717         if (status) {
1718                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1719                 return -ENOENT;
1720         }
1721         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1722                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1723                 release_firmware(fw_p);
1724                 return -ENOENT;
1725         }
1726
1727         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1728         buffer = kmalloc(buffer_size, GFP_KERNEL);
1729         if (buffer) {
1730                 memcpy(buffer, fw_p->data, fw_p->size);
1731                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1732                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1733                 kfree(buffer);
1734         } else {
1735                 dbg("%s ENOMEM\n", __func__);
1736                 status = -ENOMEM;
1737         }
1738         release_firmware(fw_p);
1739         if (status) {
1740                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1741                                                         __func__, status);
1742                 return status;
1743         }
1744
1745         dbg("%s - download successful", __func__);
1746
1747         return 0;
1748 }