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 int 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[13+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 };
 183
 184 static struct usb_device_id ti_id_table_5052[5+TI_EXTRA_VID_PID_COUNT+1] = {
 185         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 186         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 187         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 188         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 189 };
 190
 191 static struct usb_device_id ti_id_table_combined[17+2*TI_EXTRA_VID_PID_COUNT+1] = {
 192         { USB_DEVICE(TI_VENDOR_ID, TI_3410_PRODUCT_ID) },
 193         { USB_DEVICE(TI_VENDOR_ID, TI_3410_EZ430_ID) },
 194         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_NO_FW_PRODUCT_ID) },
 195         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_NO_FW_PRODUCT_ID) },
 196         { USB_DEVICE(MTS_VENDOR_ID, MTS_CDMA_PRODUCT_ID) },
 197         { USB_DEVICE(MTS_VENDOR_ID, MTS_GSM_PRODUCT_ID) },
 198         { USB_DEVICE(MTS_VENDOR_ID, MTS_EDGE_PRODUCT_ID) },
 199         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234MU_PRODUCT_ID) },
 200         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBA_PRODUCT_ID) },
 201         { USB_DEVICE(MTS_VENDOR_ID, MTS_MT9234ZBAOLD_PRODUCT_ID) },
 202         { USB_DEVICE(TI_VENDOR_ID, TI_5052_BOOT_PRODUCT_ID) },
 203         { USB_DEVICE(TI_VENDOR_ID, TI_5152_BOOT_PRODUCT_ID) },
 204         { USB_DEVICE(TI_VENDOR_ID, TI_5052_EEPROM_PRODUCT_ID) },
 205         { USB_DEVICE(TI_VENDOR_ID, TI_5052_FIRMWARE_PRODUCT_ID) },
 206         { USB_DEVICE(IBM_VENDOR_ID, IBM_4543_PRODUCT_ID) },
 207         { USB_DEVICE(IBM_VENDOR_ID, IBM_454B_PRODUCT_ID) },
 208         { USB_DEVICE(IBM_VENDOR_ID, IBM_454C_PRODUCT_ID) },
 209         { }
 210 };
 211
 212 static struct usb_driver ti_usb_driver = {
 213         .name                   = "ti_usb_3410_5052",
 214         .probe                  = usb_serial_probe,
 215         .disconnect             = usb_serial_disconnect,
 216         .id_table               = ti_id_table_combined,
 217         .no_dynamic_id =        1,
 218 };
 219
 220 static struct usb_serial_driver ti_1port_device = {
 221         .driver = {
 222                 .owner          = THIS_MODULE,
 223                 .name           = "ti_usb_3410_5052_1",
 224         },
 225         .description            = "TI USB 3410 1 port adapter",
 226         .usb_driver             = &ti_usb_driver,
 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         .usb_driver             = &ti_usb_driver,
 256         .id_table               = ti_id_table_5052,
 257         .num_ports              = 2,
 258         .attach                 = ti_startup,
 259         .release                = ti_release,
 260         .open                   = ti_open,
 261         .close                  = ti_close,
 262         .write                  = ti_write,
 263         .write_room             = ti_write_room,
 264         .chars_in_buffer        = ti_chars_in_buffer,
 265         .throttle               = ti_throttle,
 266         .unthrottle             = ti_unthrottle,
 267         .ioctl                  = ti_ioctl,
 268         .set_termios            = ti_set_termios,
 269         .tiocmget               = ti_tiocmget,
 270         .tiocmset               = ti_tiocmset,
 271         .get_icount             = ti_get_icount,
 272         .break_ctl              = ti_break,
 273         .read_int_callback      = ti_interrupt_callback,
 274         .read_bulk_callback     = ti_bulk_in_callback,
 275         .write_bulk_callback    = ti_bulk_out_callback,
 276 };
 277
 278
 279 /* Module */
 280
 281 MODULE_AUTHOR(TI_DRIVER_AUTHOR);
 282 MODULE_DESCRIPTION(TI_DRIVER_DESC);
 283 MODULE_VERSION(TI_DRIVER_VERSION);
 284 MODULE_LICENSE("GPL");
 285
 286 MODULE_FIRMWARE("ti_3410.fw");
 287 MODULE_FIRMWARE("ti_5052.fw");
 288 MODULE_FIRMWARE("mts_cdma.fw");
 289 MODULE_FIRMWARE("mts_gsm.fw");
 290 MODULE_FIRMWARE("mts_edge.fw");
 291 MODULE_FIRMWARE("mts_mt9234mu.fw");
 292 MODULE_FIRMWARE("mts_mt9234zba.fw");
 293
 294 module_param(debug, bool, S_IRUGO | S_IWUSR);
 295 MODULE_PARM_DESC(debug, "Enable debugging, 0=no, 1=yes");
 296
 297 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
 298 MODULE_PARM_DESC(closing_wait,
 299     "Maximum wait for data to drain in close, in .01 secs, default is 4000");
 300
 301 module_param_array(vendor_3410, ushort, &vendor_3410_count, S_IRUGO);
 302 MODULE_PARM_DESC(vendor_3410,
 303                 "Vendor ids for 3410 based devices, 1-5 short integers");
 304 module_param_array(product_3410, ushort, &product_3410_count, S_IRUGO);
 305 MODULE_PARM_DESC(product_3410,
 306                 "Product ids for 3410 based devices, 1-5 short integers");
 307 module_param_array(vendor_5052, ushort, &vendor_5052_count, S_IRUGO);
 308 MODULE_PARM_DESC(vendor_5052,
 309                 "Vendor ids for 5052 based devices, 1-5 short integers");
 310 module_param_array(product_5052, ushort, &product_5052_count, S_IRUGO);
 311 MODULE_PARM_DESC(product_5052,
 312                 "Product ids for 5052 based devices, 1-5 short integers");
 313
 314 MODULE_DEVICE_TABLE(usb, ti_id_table_combined);
 315
 316
 317 /* Functions */
 318
 319 static int __init ti_init(void)
 320 {
 321         int i, j, c;
 322         int ret;
 323
 324         /* insert extra vendor and product ids */
 325         c = ARRAY_SIZE(ti_id_table_combined) - 2 * TI_EXTRA_VID_PID_COUNT - 1;
 326         j = ARRAY_SIZE(ti_id_table_3410) - TI_EXTRA_VID_PID_COUNT - 1;
 327         for (i = 0; i < min(vendor_3410_count, product_3410_count); i++, j++, c++) {
 328                 ti_id_table_3410[j].idVendor = vendor_3410[i];
 329                 ti_id_table_3410[j].idProduct = product_3410[i];
 330                 ti_id_table_3410[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 331                 ti_id_table_combined[c].idVendor = vendor_3410[i];
 332                 ti_id_table_combined[c].idProduct = product_3410[i];
 333                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 334         }
 335         j = ARRAY_SIZE(ti_id_table_5052) - TI_EXTRA_VID_PID_COUNT - 1;
 336         for (i = 0; i < min(vendor_5052_count, product_5052_count); i++, j++, c++) {
 337                 ti_id_table_5052[j].idVendor = vendor_5052[i];
 338                 ti_id_table_5052[j].idProduct = product_5052[i];
 339                 ti_id_table_5052[j].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 340                 ti_id_table_combined[c].idVendor = vendor_5052[i];
 341                 ti_id_table_combined[c].idProduct = product_5052[i];
 342                 ti_id_table_combined[c].match_flags = USB_DEVICE_ID_MATCH_DEVICE;
 343         }
 344
 345         ret = usb_serial_register(&ti_1port_device);
 346         if (ret)
 347                 goto failed_1port;
 348         ret = usb_serial_register(&ti_2port_device);
 349         if (ret)
 350                 goto failed_2port;
 351
 352         ret = usb_register(&ti_usb_driver);
 353         if (ret)
 354                 goto failed_usb;
 355
 356         printk(KERN_INFO KBUILD_MODNAME ": " TI_DRIVER_VERSION ":"
 357                TI_DRIVER_DESC "\n");
 358
 359         return 0;
 360
 361 failed_usb:
 362         usb_serial_deregister(&ti_2port_device);
 363 failed_2port:
 364         usb_serial_deregister(&ti_1port_device);
 365 failed_1port:
 366         return ret;
 367 }
 368
 369
 370 static void __exit ti_exit(void)
 371 {
 372         usb_deregister(&ti_usb_driver);
 373         usb_serial_deregister(&ti_1port_device);
 374         usb_serial_deregister(&ti_2port_device);
 375 }
 376
 377
 378 module_init(ti_init);
 379 module_exit(ti_exit);
 380
 381
 382 static int ti_startup(struct usb_serial *serial)
 383 {
 384         struct ti_device *tdev;
 385         struct ti_port *tport;
 386         struct usb_device *dev = serial->dev;
 387         int status;
 388         int i;
 389
 390
 391         dbg("%s - product 0x%4X, num configurations %d, configuration value %d",
 392             __func__, le16_to_cpu(dev->descriptor.idProduct),
 393             dev->descriptor.bNumConfigurations,
 394             dev->actconfig->desc.bConfigurationValue);
 395
 396         /* create device structure */
 397         tdev = kzalloc(sizeof(struct ti_device), GFP_KERNEL);
 398         if (tdev == NULL) {
 399                 dev_err(&dev->dev, "%s - out of memory\n", __func__);
 400                 return -ENOMEM;
 401         }
 402         mutex_init(&tdev->td_open_close_lock);
 403         tdev->td_serial = serial;
 404         usb_set_serial_data(serial, tdev);
 405
 406         /* determine device type */
 407         if (usb_match_id(serial->interface, ti_id_table_3410))
 408                 tdev->td_is_3410 = 1;
 409         dbg("%s - device type is %s", __func__,
 410                                 tdev->td_is_3410 ? "3410" : "5052");
 411
 412         /* if we have only 1 configuration, download firmware */
 413         if (dev->descriptor.bNumConfigurations == 1) {
 414                 if ((status = ti_download_firmware(tdev)) != 0)
 415                         goto free_tdev;
 416
 417                 /* 3410 must be reset, 5052 resets itself */
 418                 if (tdev->td_is_3410) {
 419                         msleep_interruptible(100);
 420                         usb_reset_device(dev);
 421                 }
 422
 423                 status = -ENODEV;
 424                 goto free_tdev;
 425         }
 426
 427         /* the second configuration must be set */
 428         if (dev->actconfig->desc.bConfigurationValue == TI_BOOT_CONFIG) {
 429                 status = usb_driver_set_configuration(dev, TI_ACTIVE_CONFIG);
 430                 status = status ? status : -ENODEV;
 431                 goto free_tdev;
 432         }
 433
 434         /* set up port structures */
 435         for (i = 0; i < serial->num_ports; ++i) {
 436                 tport = kzalloc(sizeof(struct ti_port), GFP_KERNEL);
 437                 if (tport == NULL) {
 438                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 439                         status = -ENOMEM;
 440                         goto free_tports;
 441                 }
 442                 spin_lock_init(&tport->tp_lock);
 443                 tport->tp_uart_base_addr = (i == 0 ?
 444                                 TI_UART1_BASE_ADDR : TI_UART2_BASE_ADDR);
 445                 tport->tp_closing_wait = closing_wait;
 446                 init_waitqueue_head(&tport->tp_msr_wait);
 447                 init_waitqueue_head(&tport->tp_write_wait);
 448                 if (kfifo_alloc(&tport->write_fifo, TI_WRITE_BUF_SIZE,
 449                                                                 GFP_KERNEL)) {
 450                         dev_err(&dev->dev, "%s - out of memory\n", __func__);
 451                         kfree(tport);
 452                         status = -ENOMEM;
 453                         goto free_tports;
 454                 }
 455                 tport->tp_port = serial->port[i];
 456                 tport->tp_tdev = tdev;
 457                 usb_set_serial_port_data(serial->port[i], tport);
 458                 tport->tp_uart_mode = 0;        /* default is RS232 */
 459         }
 460
 461         return 0;
 462
 463 free_tports:
 464         for (--i; i >= 0; --i) {
 465                 tport = usb_get_serial_port_data(serial->port[i]);
 466                 kfifo_free(&tport->write_fifo);
 467                 kfree(tport);
 468                 usb_set_serial_port_data(serial->port[i], NULL);
 469         }
 470 free_tdev:
 471         kfree(tdev);
 472         usb_set_serial_data(serial, NULL);
 473         return status;
 474 }
 475
 476
 477 static void ti_release(struct usb_serial *serial)
 478 {
 479         int i;
 480         struct ti_device *tdev = usb_get_serial_data(serial);
 481         struct ti_port *tport;
 482
 483         dbg("%s", __func__);
 484
 485         for (i = 0; i < serial->num_ports; ++i) {
 486                 tport = usb_get_serial_port_data(serial->port[i]);
 487                 if (tport) {
 488                         kfifo_free(&tport->write_fifo);
 489                         kfree(tport);
 490                 }
 491         }
 492
 493         kfree(tdev);
 494 }
 495
 496
 497 static int ti_open(struct tty_struct *tty, struct usb_serial_port *port)
 498 {
 499         struct ti_port *tport = usb_get_serial_port_data(port);
 500         struct ti_device *tdev;
 501         struct usb_device *dev;
 502         struct urb *urb;
 503         int port_number;
 504         int status;
 505         __u16 open_settings = (__u8)(TI_PIPE_MODE_CONTINOUS |
 506                              TI_PIPE_TIMEOUT_ENABLE |
 507                              (TI_TRANSFER_TIMEOUT << 2));
 508
 509         dbg("%s - port %d", __func__, port->number);
 510
 511         if (tport == NULL)
 512                 return -ENODEV;
 513
 514         dev = port->serial->dev;
 515         tdev = tport->tp_tdev;
 516
 517         /* only one open on any port on a device at a time */
 518         if (mutex_lock_interruptible(&tdev->td_open_close_lock))
 519                 return -ERESTARTSYS;
 520
 521         port_number = port->number - port->serial->minor;
 522
 523         memset(&(tport->tp_icount), 0x00, sizeof(tport->tp_icount));
 524
 525         tport->tp_msr = 0;
 526         tport->tp_shadow_mcr |= (TI_MCR_RTS | TI_MCR_DTR);
 527
 528         /* start interrupt urb the first time a port is opened on this device */
 529         if (tdev->td_open_port_count == 0) {
 530                 dbg("%s - start interrupt in urb", __func__);
 531                 urb = tdev->td_serial->port[0]->interrupt_in_urb;
 532                 if (!urb) {
 533                         dev_err(&port->dev, "%s - no interrupt urb\n",
 534                                                                 __func__);
 535                         status = -EINVAL;
 536                         goto release_lock;
 537                 }
 538                 urb->complete = ti_interrupt_callback;
 539                 urb->context = tdev;
 540                 urb->dev = dev;
 541                 status = usb_submit_urb(urb, GFP_KERNEL);
 542                 if (status) {
 543                         dev_err(&port->dev,
 544                                 "%s - submit interrupt urb failed, %d\n",
 545                                         __func__, status);
 546                         goto release_lock;
 547                 }
 548         }
 549
 550         if (tty)
 551                 ti_set_termios(tty, port, tty->termios);
 552
 553         dbg("%s - sending TI_OPEN_PORT", __func__);
 554         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 555                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 556         if (status) {
 557                 dev_err(&port->dev, "%s - cannot send open command, %d\n",
 558                                                         __func__, status);
 559                 goto unlink_int_urb;
 560         }
 561
 562         dbg("%s - sending TI_START_PORT", __func__);
 563         status = ti_command_out_sync(tdev, TI_START_PORT,
 564                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 565         if (status) {
 566                 dev_err(&port->dev, "%s - cannot send start command, %d\n",
 567                                                         __func__, status);
 568                 goto unlink_int_urb;
 569         }
 570
 571         dbg("%s - sending TI_PURGE_PORT", __func__);
 572         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 573                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_INPUT, NULL, 0);
 574         if (status) {
 575                 dev_err(&port->dev, "%s - cannot clear input buffers, %d\n",
 576                                                         __func__, status);
 577                 goto unlink_int_urb;
 578         }
 579         status = ti_command_out_sync(tdev, TI_PURGE_PORT,
 580                 (__u8)(TI_UART1_PORT + port_number), TI_PURGE_OUTPUT, NULL, 0);
 581         if (status) {
 582                 dev_err(&port->dev, "%s - cannot clear output buffers, %d\n",
 583                                                         __func__, status);
 584                 goto unlink_int_urb;
 585         }
 586
 587         /* reset the data toggle on the bulk endpoints to work around bug in
 588          * host controllers where things get out of sync some times */
 589         usb_clear_halt(dev, port->write_urb->pipe);
 590         usb_clear_halt(dev, port->read_urb->pipe);
 591
 592         if (tty)
 593                 ti_set_termios(tty, port, tty->termios);
 594
 595         dbg("%s - sending TI_OPEN_PORT (2)", __func__);
 596         status = ti_command_out_sync(tdev, TI_OPEN_PORT,
 597                 (__u8)(TI_UART1_PORT + port_number), open_settings, NULL, 0);
 598         if (status) {
 599                 dev_err(&port->dev, "%s - cannot send open command (2), %d\n",
 600                                                         __func__, status);
 601                 goto unlink_int_urb;
 602         }
 603
 604         dbg("%s - sending TI_START_PORT (2)", __func__);
 605         status = ti_command_out_sync(tdev, TI_START_PORT,
 606                 (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 607         if (status) {
 608                 dev_err(&port->dev, "%s - cannot send start command (2), %d\n",
 609                                                         __func__, status);
 610                 goto unlink_int_urb;
 611         }
 612
 613         /* start read urb */
 614         dbg("%s - start read urb", __func__);
 615         urb = port->read_urb;
 616         if (!urb) {
 617                 dev_err(&port->dev, "%s - no read urb\n", __func__);
 618                 status = -EINVAL;
 619                 goto unlink_int_urb;
 620         }
 621         tport->tp_read_urb_state = TI_READ_URB_RUNNING;
 622         urb->complete = ti_bulk_in_callback;
 623         urb->context = tport;
 624         urb->dev = dev;
 625         status = usb_submit_urb(urb, GFP_KERNEL);
 626         if (status) {
 627                 dev_err(&port->dev, "%s - submit read urb failed, %d\n",
 628                                                         __func__, status);
 629                 goto unlink_int_urb;
 630         }
 631
 632         tport->tp_is_open = 1;
 633         ++tdev->td_open_port_count;
 634
 635         goto release_lock;
 636
 637 unlink_int_urb:
 638         if (tdev->td_open_port_count == 0)
 639                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 640 release_lock:
 641         mutex_unlock(&tdev->td_open_close_lock);
 642         dbg("%s - exit %d", __func__, status);
 643         return status;
 644 }
 645
 646
 647 static void ti_close(struct usb_serial_port *port)
 648 {
 649         struct ti_device *tdev;
 650         struct ti_port *tport;
 651         int port_number;
 652         int status;
 653         int do_unlock;
 654
 655         dbg("%s - port %d", __func__, port->number);
 656
 657         tdev = usb_get_serial_data(port->serial);
 658         tport = usb_get_serial_port_data(port);
 659         if (tdev == NULL || tport == NULL)
 660                 return;
 661
 662         tport->tp_is_open = 0;
 663
 664         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 1);
 665
 666         usb_kill_urb(port->read_urb);
 667         usb_kill_urb(port->write_urb);
 668         tport->tp_write_urb_in_use = 0;
 669
 670         port_number = port->number - port->serial->minor;
 671
 672         dbg("%s - sending TI_CLOSE_PORT", __func__);
 673         status = ti_command_out_sync(tdev, TI_CLOSE_PORT,
 674                      (__u8)(TI_UART1_PORT + port_number), 0, NULL, 0);
 675         if (status)
 676                 dev_err(&port->dev,
 677                         "%s - cannot send close port command, %d\n"
 678                                                         , __func__, status);
 679
 680         /* if mutex_lock is interrupted, continue anyway */
 681         do_unlock = !mutex_lock_interruptible(&tdev->td_open_close_lock);
 682         --tport->tp_tdev->td_open_port_count;
 683         if (tport->tp_tdev->td_open_port_count <= 0) {
 684                 /* last port is closed, shut down interrupt urb */
 685                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
 686                 tport->tp_tdev->td_open_port_count = 0;
 687         }
 688         if (do_unlock)
 689                 mutex_unlock(&tdev->td_open_close_lock);
 690
 691         dbg("%s - exit", __func__);
 692 }
 693
 694
 695 static int ti_write(struct tty_struct *tty, struct usb_serial_port *port,
 696                         const unsigned char *data, int count)
 697 {
 698         struct ti_port *tport = usb_get_serial_port_data(port);
 699
 700         dbg("%s - port %d", __func__, port->number);
 701
 702         if (count == 0) {
 703                 dbg("%s - write request of 0 bytes", __func__);
 704                 return 0;
 705         }
 706
 707         if (tport == NULL || !tport->tp_is_open)
 708                 return -ENODEV;
 709
 710         count = kfifo_in_locked(&tport->write_fifo, data, count,
 711                                                         &tport->tp_lock);
 712         ti_send(tport);
 713
 714         return count;
 715 }
 716
 717
 718 static int ti_write_room(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 room = 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         room = kfifo_avail(&tport->write_fifo);
 732         spin_unlock_irqrestore(&tport->tp_lock, flags);
 733
 734         dbg("%s - returns %d", __func__, room);
 735         return room;
 736 }
 737
 738
 739 static int ti_chars_in_buffer(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         int chars = 0;
 744         unsigned long flags;
 745
 746         dbg("%s - port %d", __func__, port->number);
 747
 748         if (tport == NULL)
 749                 return 0;
 750
 751         spin_lock_irqsave(&tport->tp_lock, flags);
 752         chars = kfifo_len(&tport->write_fifo);
 753         spin_unlock_irqrestore(&tport->tp_lock, flags);
 754
 755         dbg("%s - returns %d", __func__, chars);
 756         return chars;
 757 }
 758
 759
 760 static void ti_throttle(struct tty_struct *tty)
 761 {
 762         struct usb_serial_port *port = tty->driver_data;
 763         struct ti_port *tport = usb_get_serial_port_data(port);
 764
 765         dbg("%s - port %d", __func__, port->number);
 766
 767         if (tport == NULL)
 768                 return;
 769
 770         if (I_IXOFF(tty) || C_CRTSCTS(tty))
 771                 ti_stop_read(tport, tty);
 772
 773 }
 774
 775
 776 static void ti_unthrottle(struct tty_struct *tty)
 777 {
 778         struct usb_serial_port *port = tty->driver_data;
 779         struct ti_port *tport = usb_get_serial_port_data(port);
 780         int status;
 781
 782         dbg("%s - port %d", __func__, port->number);
 783
 784         if (tport == NULL)
 785                 return;
 786
 787         if (I_IXOFF(tty) || C_CRTSCTS(tty)) {
 788                 status = ti_restart_read(tport, tty);
 789                 if (status)
 790                         dev_err(&port->dev, "%s - cannot restart read, %d\n",
 791                                                         __func__, status);
 792         }
 793 }
 794
 795 static int ti_get_icount(struct tty_struct *tty,
 796                 struct serial_icounter_struct *icount)
 797 {
 798         struct usb_serial_port *port = tty->driver_data;
 799         struct ti_port *tport = usb_get_serial_port_data(port);
 800         struct async_icount cnow = tport->tp_icount;
 801
 802         dbg("%s - (%d) TIOCGICOUNT RX=%d, TX=%d",
 803                 __func__, port->number,
 804                 cnow.rx, cnow.tx);
 805
 806         icount->cts = cnow.cts;
 807         icount->dsr = cnow.dsr;
 808         icount->rng = cnow.rng;
 809         icount->dcd = cnow.dcd;
 810         icount->rx = cnow.rx;
 811         icount->tx = cnow.tx;
 812         icount->frame = cnow.frame;
 813         icount->overrun = cnow.overrun;
 814         icount->parity = cnow.parity;
 815         icount->brk = cnow.brk;
 816         icount->buf_overrun = cnow.buf_overrun;
 817
 818         return 0;
 819 }
 820
 821 static int ti_ioctl(struct tty_struct *tty,
 822         unsigned int cmd, unsigned long arg)
 823 {
 824         struct usb_serial_port *port = tty->driver_data;
 825         struct ti_port *tport = usb_get_serial_port_data(port);
 826         struct async_icount cnow;
 827         struct async_icount cprev;
 828
 829         dbg("%s - port %d, cmd = 0x%04X", __func__, port->number, cmd);
 830
 831         if (tport == NULL)
 832                 return -ENODEV;
 833
 834         switch (cmd) {
 835         case TIOCGSERIAL:
 836                 dbg("%s - (%d) TIOCGSERIAL", __func__, port->number);
 837                 return ti_get_serial_info(tport,
 838                                 (struct serial_struct __user *)arg);
 839         case TIOCSSERIAL:
 840                 dbg("%s - (%d) TIOCSSERIAL", __func__, port->number);
 841                 return ti_set_serial_info(tty, tport,
 842                                 (struct serial_struct __user *)arg);
 843         case TIOCMIWAIT:
 844                 dbg("%s - (%d) TIOCMIWAIT", __func__, port->number);
 845                 cprev = tport->tp_icount;
 846                 while (1) {
 847                         interruptible_sleep_on(&tport->tp_msr_wait);
 848                         if (signal_pending(current))
 849                                 return -ERESTARTSYS;
 850                         cnow = tport->tp_icount;
 851                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
 852                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
 853                                 return -EIO; /* no change => error */
 854                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
 855                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
 856                             ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
 857                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)))
 858                                 return 0;
 859                         cprev = cnow;
 860                 }
 861                 break;
 862         }
 863         return -ENOIOCTLCMD;
 864 }
 865
 866
 867 static void ti_set_termios(struct tty_struct *tty,
 868                 struct usb_serial_port *port, struct ktermios *old_termios)
 869 {
 870         struct ti_port *tport = usb_get_serial_port_data(port);
 871         struct ti_uart_config *config;
 872         tcflag_t cflag, iflag;
 873         int baud;
 874         int status;
 875         int port_number = port->number - port->serial->minor;
 876         unsigned int mcr;
 877
 878         dbg("%s - port %d", __func__, port->number);
 879
 880         cflag = tty->termios->c_cflag;
 881         iflag = tty->termios->c_iflag;
 882
 883         dbg("%s - cflag %08x, iflag %08x", __func__, cflag, iflag);
 884         dbg("%s - old clfag %08x, old iflag %08x", __func__,
 885                                 old_termios->c_cflag, old_termios->c_iflag);
 886
 887         if (tport == NULL)
 888                 return;
 889
 890         config = kmalloc(sizeof(*config), GFP_KERNEL);
 891         if (!config) {
 892                 dev_err(&port->dev, "%s - out of memory\n", __func__);
 893                 return;
 894         }
 895
 896         config->wFlags = 0;
 897
 898         /* these flags must be set */
 899         config->wFlags |= TI_UART_ENABLE_MS_INTS;
 900         config->wFlags |= TI_UART_ENABLE_AUTO_START_DMA;
 901         config->bUartMode = (__u8)(tport->tp_uart_mode);
 902
 903         switch (cflag & CSIZE) {
 904         case CS5:
 905                     config->bDataBits = TI_UART_5_DATA_BITS;
 906                     break;
 907         case CS6:
 908                     config->bDataBits = TI_UART_6_DATA_BITS;
 909                     break;
 910         case CS7:
 911                     config->bDataBits = TI_UART_7_DATA_BITS;
 912                     break;
 913         default:
 914         case CS8:
 915                     config->bDataBits = TI_UART_8_DATA_BITS;
 916                     break;
 917         }
 918
 919         /* CMSPAR isn't supported by this driver */
 920         tty->termios->c_cflag &= ~CMSPAR;
 921
 922         if (cflag & PARENB) {
 923                 if (cflag & PARODD) {
 924                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 925                         config->bParity = TI_UART_ODD_PARITY;
 926                 } else {
 927                         config->wFlags |= TI_UART_ENABLE_PARITY_CHECKING;
 928                         config->bParity = TI_UART_EVEN_PARITY;
 929                 }
 930         } else {
 931                 config->wFlags &= ~TI_UART_ENABLE_PARITY_CHECKING;
 932                 config->bParity = TI_UART_NO_PARITY;
 933         }
 934
 935         if (cflag & CSTOPB)
 936                 config->bStopBits = TI_UART_2_STOP_BITS;
 937         else
 938                 config->bStopBits = TI_UART_1_STOP_BITS;
 939
 940         if (cflag & CRTSCTS) {
 941                 /* RTS flow control must be off to drop RTS for baud rate B0 */
 942                 if ((cflag & CBAUD) != B0)
 943                         config->wFlags |= TI_UART_ENABLE_RTS_IN;
 944                 config->wFlags |= TI_UART_ENABLE_CTS_OUT;
 945         } else {
 946                 tty->hw_stopped = 0;
 947                 ti_restart_read(tport, tty);
 948         }
 949
 950         if (I_IXOFF(tty) || I_IXON(tty)) {
 951                 config->cXon  = START_CHAR(tty);
 952                 config->cXoff = STOP_CHAR(tty);
 953
 954                 if (I_IXOFF(tty))
 955                         config->wFlags |= TI_UART_ENABLE_X_IN;
 956                 else
 957                         ti_restart_read(tport, tty);
 958
 959                 if (I_IXON(tty))
 960                         config->wFlags |= TI_UART_ENABLE_X_OUT;
 961         }
 962
 963         baud = tty_get_baud_rate(tty);
 964         if (!baud)
 965                 baud = 9600;
 966         if (tport->tp_tdev->td_is_3410)
 967                 config->wBaudRate = (__u16)((923077 + baud/2) / baud);
 968         else
 969                 config->wBaudRate = (__u16)((461538 + baud/2) / baud);
 970
 971         /* FIXME: Should calculate resulting baud here and report it back */
 972         if ((cflag & CBAUD) != B0)
 973                 tty_encode_baud_rate(tty, baud, baud);
 974
 975         dbg("%s - BaudRate=%d, wBaudRate=%d, wFlags=0x%04X, bDataBits=%d, bParity=%d, bStopBits=%d, cXon=%d, cXoff=%d, bUartMode=%d",
 976         __func__, baud, config->wBaudRate, config->wFlags, config->bDataBits, config->bParity, config->bStopBits, config->cXon, config->cXoff, config->bUartMode);
 977
 978         cpu_to_be16s(&config->wBaudRate);
 979         cpu_to_be16s(&config->wFlags);
 980
 981         status = ti_command_out_sync(tport->tp_tdev, TI_SET_CONFIG,
 982                 (__u8)(TI_UART1_PORT + port_number), 0, (__u8 *)config,
 983                 sizeof(*config));
 984         if (status)
 985                 dev_err(&port->dev, "%s - cannot set config on port %d, %d\n",
 986                                         __func__, port_number, status);
 987
 988         /* SET_CONFIG asserts RTS and DTR, reset them correctly */
 989         mcr = tport->tp_shadow_mcr;
 990         /* if baud rate is B0, clear RTS and DTR */
 991         if ((cflag & CBAUD) == B0)
 992                 mcr &= ~(TI_MCR_DTR | TI_MCR_RTS);
 993         status = ti_set_mcr(tport, mcr);
 994         if (status)
 995                 dev_err(&port->dev,
 996                         "%s - cannot set modem control on port %d, %d\n",
 997                                                 __func__, port_number, status);
 998
 999         kfree(config);
1000 }
1001
1002
1003 static int ti_tiocmget(struct tty_struct *tty)
1004 {
1005         struct usb_serial_port *port = tty->driver_data;
1006         struct ti_port *tport = usb_get_serial_port_data(port);
1007         unsigned int result;
1008         unsigned int msr;
1009         unsigned int mcr;
1010         unsigned long flags;
1011
1012         dbg("%s - port %d", __func__, port->number);
1013
1014         if (tport == NULL)
1015                 return -ENODEV;
1016
1017         spin_lock_irqsave(&tport->tp_lock, flags);
1018         msr = tport->tp_msr;
1019         mcr = tport->tp_shadow_mcr;
1020         spin_unlock_irqrestore(&tport->tp_lock, flags);
1021
1022         result = ((mcr & TI_MCR_DTR) ? TIOCM_DTR : 0)
1023                 | ((mcr & TI_MCR_RTS) ? TIOCM_RTS : 0)
1024                 | ((mcr & TI_MCR_LOOP) ? TIOCM_LOOP : 0)
1025                 | ((msr & TI_MSR_CTS) ? TIOCM_CTS : 0)
1026                 | ((msr & TI_MSR_CD) ? TIOCM_CAR : 0)
1027                 | ((msr & TI_MSR_RI) ? TIOCM_RI : 0)
1028                 | ((msr & TI_MSR_DSR) ? TIOCM_DSR : 0);
1029
1030         dbg("%s - 0x%04X", __func__, result);
1031
1032         return result;
1033 }
1034
1035
1036 static int ti_tiocmset(struct tty_struct *tty,
1037                                 unsigned int set, unsigned int clear)
1038 {
1039         struct usb_serial_port *port = tty->driver_data;
1040         struct ti_port *tport = usb_get_serial_port_data(port);
1041         unsigned int mcr;
1042         unsigned long flags;
1043
1044         dbg("%s - port %d", __func__, port->number);
1045
1046         if (tport == NULL)
1047                 return -ENODEV;
1048
1049         spin_lock_irqsave(&tport->tp_lock, flags);
1050         mcr = tport->tp_shadow_mcr;
1051
1052         if (set & TIOCM_RTS)
1053                 mcr |= TI_MCR_RTS;
1054         if (set & TIOCM_DTR)
1055                 mcr |= TI_MCR_DTR;
1056         if (set & TIOCM_LOOP)
1057                 mcr |= TI_MCR_LOOP;
1058
1059         if (clear & TIOCM_RTS)
1060                 mcr &= ~TI_MCR_RTS;
1061         if (clear & TIOCM_DTR)
1062                 mcr &= ~TI_MCR_DTR;
1063         if (clear & TIOCM_LOOP)
1064                 mcr &= ~TI_MCR_LOOP;
1065         spin_unlock_irqrestore(&tport->tp_lock, flags);
1066
1067         return ti_set_mcr(tport, mcr);
1068 }
1069
1070
1071 static void ti_break(struct tty_struct *tty, int break_state)
1072 {
1073         struct usb_serial_port *port = tty->driver_data;
1074         struct ti_port *tport = usb_get_serial_port_data(port);
1075         int status;
1076
1077         dbg("%s - state = %d", __func__, break_state);
1078
1079         if (tport == NULL)
1080                 return;
1081
1082         ti_drain(tport, (tport->tp_closing_wait*HZ)/100, 0);
1083
1084         status = ti_write_byte(tport->tp_tdev,
1085                 tport->tp_uart_base_addr + TI_UART_OFFSET_LCR,
1086                 TI_LCR_BREAK, break_state == -1 ? TI_LCR_BREAK : 0);
1087
1088         if (status)
1089                 dbg("%s - error setting break, %d", __func__, status);
1090 }
1091
1092
1093 static void ti_interrupt_callback(struct urb *urb)
1094 {
1095         struct ti_device *tdev = urb->context;
1096         struct usb_serial_port *port;
1097         struct usb_serial *serial = tdev->td_serial;
1098         struct ti_port *tport;
1099         struct device *dev = &urb->dev->dev;
1100         unsigned char *data = urb->transfer_buffer;
1101         int length = urb->actual_length;
1102         int port_number;
1103         int function;
1104         int status = urb->status;
1105         int retval;
1106         __u8 msr;
1107
1108         dbg("%s", __func__);
1109
1110         switch (status) {
1111         case 0:
1112                 break;
1113         case -ECONNRESET:
1114         case -ENOENT:
1115         case -ESHUTDOWN:
1116                 dbg("%s - urb shutting down, %d", __func__, status);
1117                 tdev->td_urb_error = 1;
1118                 return;
1119         default:
1120                 dev_err(dev, "%s - nonzero urb status, %d\n",
1121                         __func__, status);
1122                 tdev->td_urb_error = 1;
1123                 goto exit;
1124         }
1125
1126         if (length != 2) {
1127                 dbg("%s - bad packet size, %d", __func__, length);
1128                 goto exit;
1129         }
1130
1131         if (data[0] == TI_CODE_HARDWARE_ERROR) {
1132                 dev_err(dev, "%s - hardware error, %d\n", __func__, data[1]);
1133                 goto exit;
1134         }
1135
1136         port_number = TI_GET_PORT_FROM_CODE(data[0]);
1137         function = TI_GET_FUNC_FROM_CODE(data[0]);
1138
1139         dbg("%s - port_number %d, function %d, data 0x%02X",
1140                                 __func__, port_number, function, data[1]);
1141
1142         if (port_number >= serial->num_ports) {
1143                 dev_err(dev, "%s - bad port number, %d\n",
1144                                                 __func__, port_number);
1145                 goto exit;
1146         }
1147
1148         port = serial->port[port_number];
1149
1150         tport = usb_get_serial_port_data(port);
1151         if (!tport)
1152                 goto exit;
1153
1154         switch (function) {
1155         case TI_CODE_DATA_ERROR:
1156                 dev_err(dev, "%s - DATA ERROR, port %d, data 0x%02X\n",
1157                                         __func__, port_number, data[1]);
1158                 break;
1159
1160         case TI_CODE_MODEM_STATUS:
1161                 msr = data[1];
1162                 dbg("%s - port %d, msr 0x%02X", __func__, port_number, msr);
1163                 ti_handle_new_msr(tport, msr);
1164                 break;
1165
1166         default:
1167                 dev_err(dev, "%s - unknown interrupt code, 0x%02X\n",
1168                                                         __func__, data[1]);
1169                 break;
1170         }
1171
1172 exit:
1173         retval = usb_submit_urb(urb, GFP_ATOMIC);
1174         if (retval)
1175                 dev_err(dev, "%s - resubmit interrupt urb failed, %d\n",
1176                         __func__, retval);
1177 }
1178
1179
1180 static void ti_bulk_in_callback(struct urb *urb)
1181 {
1182         struct ti_port *tport = urb->context;
1183         struct usb_serial_port *port = tport->tp_port;
1184         struct device *dev = &urb->dev->dev;
1185         int status = urb->status;
1186         int retval = 0;
1187         struct tty_struct *tty;
1188
1189         dbg("%s", __func__);
1190
1191         switch (status) {
1192         case 0:
1193                 break;
1194         case -ECONNRESET:
1195         case -ENOENT:
1196         case -ESHUTDOWN:
1197                 dbg("%s - urb shutting down, %d", __func__, status);
1198                 tport->tp_tdev->td_urb_error = 1;
1199                 wake_up_interruptible(&tport->tp_write_wait);
1200                 return;
1201         default:
1202                 dev_err(dev, "%s - nonzero urb status, %d\n",
1203                         __func__, status);
1204                 tport->tp_tdev->td_urb_error = 1;
1205                 wake_up_interruptible(&tport->tp_write_wait);
1206         }
1207
1208         if (status == -EPIPE)
1209                 goto exit;
1210
1211         if (status) {
1212                 dev_err(dev, "%s - stopping read!\n", __func__);
1213                 return;
1214         }
1215
1216         tty = tty_port_tty_get(&port->port);
1217         if (tty) {
1218                 if (urb->actual_length) {
1219                         usb_serial_debug_data(debug, dev, __func__,
1220                                 urb->actual_length, urb->transfer_buffer);
1221
1222                         if (!tport->tp_is_open)
1223                                 dbg("%s - port closed, dropping data",
1224                                         __func__);
1225                         else
1226                                 ti_recv(&urb->dev->dev, tty,
1227                                                 urb->transfer_buffer,
1228                                                 urb->actual_length);
1229                         spin_lock(&tport->tp_lock);
1230                         tport->tp_icount.rx += urb->actual_length;
1231                         spin_unlock(&tport->tp_lock);
1232                 }
1233                 tty_kref_put(tty);
1234         }
1235
1236 exit:
1237         /* continue to read unless stopping */
1238         spin_lock(&tport->tp_lock);
1239         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING) {
1240                 urb->dev = port->serial->dev;
1241                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1242         } else if (tport->tp_read_urb_state == TI_READ_URB_STOPPING) {
1243                 tport->tp_read_urb_state = TI_READ_URB_STOPPED;
1244         }
1245         spin_unlock(&tport->tp_lock);
1246         if (retval)
1247                 dev_err(dev, "%s - resubmit read urb failed, %d\n",
1248                         __func__, retval);
1249 }
1250
1251
1252 static void ti_bulk_out_callback(struct urb *urb)
1253 {
1254         struct ti_port *tport = urb->context;
1255         struct usb_serial_port *port = tport->tp_port;
1256         struct device *dev = &urb->dev->dev;
1257         int status = urb->status;
1258
1259         dbg("%s - port %d", __func__, port->number);
1260
1261         tport->tp_write_urb_in_use = 0;
1262
1263         switch (status) {
1264         case 0:
1265                 break;
1266         case -ECONNRESET:
1267         case -ENOENT:
1268         case -ESHUTDOWN:
1269                 dbg("%s - urb shutting down, %d", __func__, status);
1270                 tport->tp_tdev->td_urb_error = 1;
1271                 wake_up_interruptible(&tport->tp_write_wait);
1272                 return;
1273         default:
1274                 dev_err(dev, "%s - nonzero urb status, %d\n",
1275                         __func__, status);
1276                 tport->tp_tdev->td_urb_error = 1;
1277                 wake_up_interruptible(&tport->tp_write_wait);
1278         }
1279
1280         /* send any buffered data */
1281         ti_send(tport);
1282 }
1283
1284
1285 static void ti_recv(struct device *dev, struct tty_struct *tty,
1286         unsigned char *data, int length)
1287 {
1288         int cnt;
1289
1290         do {
1291                 cnt = tty_insert_flip_string(tty, data, length);
1292                 if (cnt < length) {
1293                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1294                                                 __func__, length - cnt);
1295                         if (cnt == 0)
1296                                 break;
1297                 }
1298                 tty_flip_buffer_push(tty);
1299                 data += cnt;
1300                 length -= cnt;
1301         } while (length > 0);
1302
1303 }
1304
1305
1306 static void ti_send(struct ti_port *tport)
1307 {
1308         int count, result;
1309         struct usb_serial_port *port = tport->tp_port;
1310         struct tty_struct *tty = tty_port_tty_get(&port->port); /* FIXME */
1311         unsigned long flags;
1312
1313
1314         dbg("%s - port %d", __func__, port->number);
1315
1316         spin_lock_irqsave(&tport->tp_lock, flags);
1317
1318         if (tport->tp_write_urb_in_use)
1319                 goto unlock;
1320
1321         count = kfifo_out(&tport->write_fifo,
1322                                 port->write_urb->transfer_buffer,
1323                                 port->bulk_out_size);
1324
1325         if (count == 0)
1326                 goto unlock;
1327
1328         tport->tp_write_urb_in_use = 1;
1329
1330         spin_unlock_irqrestore(&tport->tp_lock, flags);
1331
1332         usb_serial_debug_data(debug, &port->dev, __func__, count,
1333                                         port->write_urb->transfer_buffer);
1334
1335         usb_fill_bulk_urb(port->write_urb, port->serial->dev,
1336                            usb_sndbulkpipe(port->serial->dev,
1337                                             port->bulk_out_endpointAddress),
1338                            port->write_urb->transfer_buffer, count,
1339                            ti_bulk_out_callback, tport);
1340
1341         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
1342         if (result) {
1343                 dev_err(&port->dev, "%s - submit write urb failed, %d\n",
1344                                                         __func__, result);
1345                 tport->tp_write_urb_in_use = 0;
1346                 /* TODO: reschedule ti_send */
1347         } else {
1348                 spin_lock_irqsave(&tport->tp_lock, flags);
1349                 tport->tp_icount.tx += count;
1350                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1351         }
1352
1353         /* more room in the buffer for new writes, wakeup */
1354         if (tty)
1355                 tty_wakeup(tty);
1356         tty_kref_put(tty);
1357         wake_up_interruptible(&tport->tp_write_wait);
1358         return;
1359 unlock:
1360         spin_unlock_irqrestore(&tport->tp_lock, flags);
1361         tty_kref_put(tty);
1362         return;
1363 }
1364
1365
1366 static int ti_set_mcr(struct ti_port *tport, unsigned int mcr)
1367 {
1368         unsigned long flags;
1369         int status;
1370
1371         status = ti_write_byte(tport->tp_tdev,
1372                 tport->tp_uart_base_addr + TI_UART_OFFSET_MCR,
1373                 TI_MCR_RTS | TI_MCR_DTR | TI_MCR_LOOP, mcr);
1374
1375         spin_lock_irqsave(&tport->tp_lock, flags);
1376         if (!status)
1377                 tport->tp_shadow_mcr = mcr;
1378         spin_unlock_irqrestore(&tport->tp_lock, flags);
1379
1380         return status;
1381 }
1382
1383
1384 static int ti_get_lsr(struct ti_port *tport)
1385 {
1386         int size, status;
1387         struct ti_device *tdev = tport->tp_tdev;
1388         struct usb_serial_port *port = tport->tp_port;
1389         int port_number = port->number - port->serial->minor;
1390         struct ti_port_status *data;
1391
1392         dbg("%s - port %d", __func__, port->number);
1393
1394         size = sizeof(struct ti_port_status);
1395         data = kmalloc(size, GFP_KERNEL);
1396         if (!data) {
1397                 dev_err(&port->dev, "%s - out of memory\n", __func__);
1398                 return -ENOMEM;
1399         }
1400
1401         status = ti_command_in_sync(tdev, TI_GET_PORT_STATUS,
1402                 (__u8)(TI_UART1_PORT+port_number), 0, (__u8 *)data, size);
1403         if (status) {
1404                 dev_err(&port->dev,
1405                         "%s - get port status command failed, %d\n",
1406                                                         __func__, status);
1407                 goto free_data;
1408         }
1409
1410         dbg("%s - lsr 0x%02X", __func__, data->bLSR);
1411
1412         tport->tp_lsr = data->bLSR;
1413
1414 free_data:
1415         kfree(data);
1416         return status;
1417 }
1418
1419
1420 static int ti_get_serial_info(struct ti_port *tport,
1421         struct serial_struct __user *ret_arg)
1422 {
1423         struct usb_serial_port *port = tport->tp_port;
1424         struct serial_struct ret_serial;
1425
1426         if (!ret_arg)
1427                 return -EFAULT;
1428
1429         memset(&ret_serial, 0, sizeof(ret_serial));
1430
1431         ret_serial.type = PORT_16550A;
1432         ret_serial.line = port->serial->minor;
1433         ret_serial.port = port->number - port->serial->minor;
1434         ret_serial.flags = tport->tp_flags;
1435         ret_serial.xmit_fifo_size = TI_WRITE_BUF_SIZE;
1436         ret_serial.baud_base = tport->tp_tdev->td_is_3410 ? 921600 : 460800;
1437         ret_serial.closing_wait = tport->tp_closing_wait;
1438
1439         if (copy_to_user(ret_arg, &ret_serial, sizeof(*ret_arg)))
1440                 return -EFAULT;
1441
1442         return 0;
1443 }
1444
1445
1446 static int ti_set_serial_info(struct tty_struct *tty, struct ti_port *tport,
1447         struct serial_struct __user *new_arg)
1448 {
1449         struct serial_struct new_serial;
1450
1451         if (copy_from_user(&new_serial, new_arg, sizeof(new_serial)))
1452                 return -EFAULT;
1453
1454         tport->tp_flags = new_serial.flags & TI_SET_SERIAL_FLAGS;
1455         tport->tp_closing_wait = new_serial.closing_wait;
1456
1457         return 0;
1458 }
1459
1460
1461 static void ti_handle_new_msr(struct ti_port *tport, __u8 msr)
1462 {
1463         struct async_icount *icount;
1464         struct tty_struct *tty;
1465         unsigned long flags;
1466
1467         dbg("%s - msr 0x%02X", __func__, msr);
1468
1469         if (msr & TI_MSR_DELTA_MASK) {
1470                 spin_lock_irqsave(&tport->tp_lock, flags);
1471                 icount = &tport->tp_icount;
1472                 if (msr & TI_MSR_DELTA_CTS)
1473                         icount->cts++;
1474                 if (msr & TI_MSR_DELTA_DSR)
1475                         icount->dsr++;
1476                 if (msr & TI_MSR_DELTA_CD)
1477                         icount->dcd++;
1478                 if (msr & TI_MSR_DELTA_RI)
1479                         icount->rng++;
1480                 wake_up_interruptible(&tport->tp_msr_wait);
1481                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1482         }
1483
1484         tport->tp_msr = msr & TI_MSR_MASK;
1485
1486         /* handle CTS flow control */
1487         tty = tty_port_tty_get(&tport->tp_port->port);
1488         if (tty && C_CRTSCTS(tty)) {
1489                 if (msr & TI_MSR_CTS) {
1490                         tty->hw_stopped = 0;
1491                         tty_wakeup(tty);
1492                 } else {
1493                         tty->hw_stopped = 1;
1494                 }
1495         }
1496         tty_kref_put(tty);
1497 }
1498
1499
1500 static void ti_drain(struct ti_port *tport, unsigned long timeout, int flush)
1501 {
1502         struct ti_device *tdev = tport->tp_tdev;
1503         struct usb_serial_port *port = tport->tp_port;
1504         wait_queue_t wait;
1505
1506         dbg("%s - port %d", __func__, port->number);
1507
1508         spin_lock_irq(&tport->tp_lock);
1509
1510         /* wait for data to drain from the buffer */
1511         tdev->td_urb_error = 0;
1512         init_waitqueue_entry(&wait, current);
1513         add_wait_queue(&tport->tp_write_wait, &wait);
1514         for (;;) {
1515                 set_current_state(TASK_INTERRUPTIBLE);
1516                 if (kfifo_len(&tport->write_fifo) == 0
1517                 || timeout == 0 || signal_pending(current)
1518                 || tdev->td_urb_error
1519                 || port->serial->disconnected)  /* disconnect */
1520                         break;
1521                 spin_unlock_irq(&tport->tp_lock);
1522                 timeout = schedule_timeout(timeout);
1523                 spin_lock_irq(&tport->tp_lock);
1524         }
1525         set_current_state(TASK_RUNNING);
1526         remove_wait_queue(&tport->tp_write_wait, &wait);
1527
1528         /* flush any remaining data in the buffer */
1529         if (flush)
1530                 kfifo_reset_out(&tport->write_fifo);
1531
1532         spin_unlock_irq(&tport->tp_lock);
1533
1534         mutex_lock(&port->serial->disc_mutex);
1535         /* wait for data to drain from the device */
1536         /* wait for empty tx register, plus 20 ms */
1537         timeout += jiffies;
1538         tport->tp_lsr &= ~TI_LSR_TX_EMPTY;
1539         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
1540         && !(tport->tp_lsr&TI_LSR_TX_EMPTY) && !tdev->td_urb_error
1541         && !port->serial->disconnected) {
1542                 if (ti_get_lsr(tport))
1543                         break;
1544                 mutex_unlock(&port->serial->disc_mutex);
1545                 msleep_interruptible(20);
1546                 mutex_lock(&port->serial->disc_mutex);
1547         }
1548         mutex_unlock(&port->serial->disc_mutex);
1549 }
1550
1551
1552 static void ti_stop_read(struct ti_port *tport, struct tty_struct *tty)
1553 {
1554         unsigned long flags;
1555
1556         spin_lock_irqsave(&tport->tp_lock, flags);
1557
1558         if (tport->tp_read_urb_state == TI_READ_URB_RUNNING)
1559                 tport->tp_read_urb_state = TI_READ_URB_STOPPING;
1560
1561         spin_unlock_irqrestore(&tport->tp_lock, flags);
1562 }
1563
1564
1565 static int ti_restart_read(struct ti_port *tport, struct tty_struct *tty)
1566 {
1567         struct urb *urb;
1568         int status = 0;
1569         unsigned long flags;
1570
1571         spin_lock_irqsave(&tport->tp_lock, flags);
1572
1573         if (tport->tp_read_urb_state == TI_READ_URB_STOPPED) {
1574                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1575                 urb = tport->tp_port->read_urb;
1576                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1577                 urb->complete = ti_bulk_in_callback;
1578                 urb->context = tport;
1579                 urb->dev = tport->tp_port->serial->dev;
1580                 status = usb_submit_urb(urb, GFP_KERNEL);
1581         } else  {
1582                 tport->tp_read_urb_state = TI_READ_URB_RUNNING;
1583                 spin_unlock_irqrestore(&tport->tp_lock, flags);
1584         }
1585
1586         return status;
1587 }
1588
1589
1590 static int ti_command_out_sync(struct ti_device *tdev, __u8 command,
1591         __u16 moduleid, __u16 value, __u8 *data, int size)
1592 {
1593         int status;
1594
1595         status = usb_control_msg(tdev->td_serial->dev,
1596                 usb_sndctrlpipe(tdev->td_serial->dev, 0), command,
1597                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT),
1598                 value, moduleid, data, size, 1000);
1599
1600         if (status == size)
1601                 status = 0;
1602
1603         if (status > 0)
1604                 status = -ECOMM;
1605
1606         return status;
1607 }
1608
1609
1610 static int ti_command_in_sync(struct ti_device *tdev, __u8 command,
1611         __u16 moduleid, __u16 value, __u8 *data, int size)
1612 {
1613         int status;
1614
1615         status = usb_control_msg(tdev->td_serial->dev,
1616                 usb_rcvctrlpipe(tdev->td_serial->dev, 0), command,
1617                 (USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN),
1618                 value, moduleid, data, size, 1000);
1619
1620         if (status == size)
1621                 status = 0;
1622
1623         if (status > 0)
1624                 status = -ECOMM;
1625
1626         return status;
1627 }
1628
1629
1630 static int ti_write_byte(struct ti_device *tdev, unsigned long addr,
1631         __u8 mask, __u8 byte)
1632 {
1633         int status;
1634         unsigned int size;
1635         struct ti_write_data_bytes *data;
1636         struct device *dev = &tdev->td_serial->dev->dev;
1637
1638         dbg("%s - addr 0x%08lX, mask 0x%02X, byte 0x%02X",
1639                                         __func__, addr, mask, byte);
1640
1641         size = sizeof(struct ti_write_data_bytes) + 2;
1642         data = kmalloc(size, GFP_KERNEL);
1643         if (!data) {
1644                 dev_err(dev, "%s - out of memory\n", __func__);
1645                 return -ENOMEM;
1646         }
1647
1648         data->bAddrType = TI_RW_DATA_ADDR_XDATA;
1649         data->bDataType = TI_RW_DATA_BYTE;
1650         data->bDataCounter = 1;
1651         data->wBaseAddrHi = cpu_to_be16(addr>>16);
1652         data->wBaseAddrLo = cpu_to_be16(addr);
1653         data->bData[0] = mask;
1654         data->bData[1] = byte;
1655
1656         status = ti_command_out_sync(tdev, TI_WRITE_DATA, TI_RAM_PORT, 0,
1657                 (__u8 *)data, size);
1658
1659         if (status < 0)
1660                 dev_err(dev, "%s - failed, %d\n", __func__, status);
1661
1662         kfree(data);
1663
1664         return status;
1665 }
1666
1667 static int ti_do_download(struct usb_device *dev, int pipe,
1668                                                 u8 *buffer, int size)
1669 {
1670         int pos;
1671         u8 cs = 0;
1672         int done;
1673         struct ti_firmware_header *header;
1674         int status = 0;
1675         int len;
1676
1677         for (pos = sizeof(struct ti_firmware_header); pos < size; pos++)
1678                 cs = (__u8)(cs + buffer[pos]);
1679
1680         header = (struct ti_firmware_header *)buffer;
1681         header->wLength = cpu_to_le16((__u16)(size
1682                                         - sizeof(struct ti_firmware_header)));
1683         header->bCheckSum = cs;
1684
1685         dbg("%s - downloading firmware", __func__);
1686         for (pos = 0; pos < size; pos += done) {
1687                 len = min(size - pos, TI_DOWNLOAD_MAX_PACKET_SIZE);
1688                 status = usb_bulk_msg(dev, pipe, buffer + pos, len,
1689                                                                 &done, 1000);
1690                 if (status)
1691                         break;
1692         }
1693         return status;
1694 }
1695
1696 static int ti_download_firmware(struct ti_device *tdev)
1697 {
1698         int status;
1699         int buffer_size;
1700         __u8 *buffer;
1701         struct usb_device *dev = tdev->td_serial->dev;
1702         unsigned int pipe = usb_sndbulkpipe(dev,
1703                 tdev->td_serial->port[0]->bulk_out_endpointAddress);
1704         const struct firmware *fw_p;
1705         char buf[32];
1706
1707         dbg("%s\n", __func__);
1708         /* try ID specific firmware first, then try generic firmware */
1709         sprintf(buf, "ti_usb-v%04x-p%04x.fw", dev->descriptor.idVendor,
1710             dev->descriptor.idProduct);
1711         if ((status = request_firmware(&fw_p, buf, &dev->dev)) != 0) {
1712                 buf[0] = '\0';
1713                 if (dev->descriptor.idVendor == MTS_VENDOR_ID) {
1714                         switch (dev->descriptor.idProduct) {
1715                         case MTS_CDMA_PRODUCT_ID:
1716                                 strcpy(buf, "mts_cdma.fw");
1717                                 break;
1718                         case MTS_GSM_PRODUCT_ID:
1719                                 strcpy(buf, "mts_gsm.fw");
1720                                 break;
1721                         case MTS_EDGE_PRODUCT_ID:
1722                                 strcpy(buf, "mts_edge.fw");
1723                                 break;
1724                         case MTS_MT9234MU_PRODUCT_ID:
1725                                 strcpy(buf, "mts_mt9234mu.fw");
1726                                 break;
1727                         case MTS_MT9234ZBA_PRODUCT_ID:
1728                                 strcpy(buf, "mts_mt9234zba.fw");
1729                                 break;
1730                         case MTS_MT9234ZBAOLD_PRODUCT_ID:
1731                                 strcpy(buf, "mts_mt9234zba.fw");
1732                                 break;                  }
1733                 }
1734                 if (buf[0] == '\0') {
1735                         if (tdev->td_is_3410)
1736                                 strcpy(buf, "ti_3410.fw");
1737                         else
1738                                 strcpy(buf, "ti_5052.fw");
1739                 }
1740                 status = request_firmware(&fw_p, buf, &dev->dev);
1741         }
1742         if (status) {
1743                 dev_err(&dev->dev, "%s - firmware not found\n", __func__);
1744                 return -ENOENT;
1745         }
1746         if (fw_p->size > TI_FIRMWARE_BUF_SIZE) {
1747                 dev_err(&dev->dev, "%s - firmware too large %zu\n", __func__, fw_p->size);
1748                 return -ENOENT;
1749         }
1750
1751         buffer_size = TI_FIRMWARE_BUF_SIZE + sizeof(struct ti_firmware_header);
1752         buffer = kmalloc(buffer_size, GFP_KERNEL);
1753         if (buffer) {
1754                 memcpy(buffer, fw_p->data, fw_p->size);
1755                 memset(buffer + fw_p->size, 0xff, buffer_size - fw_p->size);
1756                 status = ti_do_download(dev, pipe, buffer, fw_p->size);
1757                 kfree(buffer);
1758         } else {
1759                 dbg("%s ENOMEM\n", __func__);
1760                 status = -ENOMEM;
1761         }
1762         release_firmware(fw_p);
1763         if (status) {
1764                 dev_err(&dev->dev, "%s - error downloading firmware, %d\n",
1765                                                         __func__, status);
1766                 return status;
1767         }
1768
1769         dbg("%s - download successful", __func__);
1770
1771         return 0;
1772 }