linux/drivers/media/dvb-frontends/or51132.c
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   1/*
   2 *    Support for OR51132 (pcHDTV HD-3000) - VSB/QAM
   3 *
   4 *
   5 *    Copyright (C) 2007 Trent Piepho <xyzzy@speakeasy.org>
   6 *
   7 *    Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
   8 *
   9 *    Based on code from Jack Kelliher (kelliher@xmission.com)
  10 *                           Copyright (C) 2002 & pcHDTV, inc.
  11 *
  12 *    This program is free software; you can redistribute it and/or modify
  13 *    it under the terms of the GNU General Public License as published by
  14 *    the Free Software Foundation; either version 2 of the License, or
  15 *    (at your option) any later version.
  16 *
  17 *    This program is distributed in the hope that it will be useful,
  18 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 *    GNU General Public License for more details.
  21 *
  22 *    You should have received a copy of the GNU General Public License
  23 *    along with this program; if not, write to the Free Software
  24 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 *
  26*/
  27
  28/*
  29 * This driver needs two external firmware files. Please copy
  30 * "dvb-fe-or51132-vsb.fw" and "dvb-fe-or51132-qam.fw" to
  31 * /usr/lib/hotplug/firmware/ or /lib/firmware/
  32 * (depending on configuration of firmware hotplug).
  33 */
  34#define OR51132_VSB_FIRMWARE "dvb-fe-or51132-vsb.fw"
  35#define OR51132_QAM_FIRMWARE "dvb-fe-or51132-qam.fw"
  36
  37#include <linux/kernel.h>
  38#include <linux/module.h>
  39#include <linux/init.h>
  40#include <linux/delay.h>
  41#include <linux/string.h>
  42#include <linux/slab.h>
  43#include <asm/byteorder.h>
  44
  45#include "dvb_math.h"
  46#include "dvb_frontend.h"
  47#include "or51132.h"
  48
  49static int debug;
  50#define dprintk(args...) \
  51        do { \
  52                if (debug) printk(KERN_DEBUG "or51132: " args); \
  53        } while (0)
  54
  55
  56struct or51132_state
  57{
  58        struct i2c_adapter* i2c;
  59
  60        /* Configuration settings */
  61        const struct or51132_config* config;
  62
  63        struct dvb_frontend frontend;
  64
  65        /* Demodulator private data */
  66        enum fe_modulation current_modulation;
  67        u32 snr; /* Result of last SNR calculation */
  68
  69        /* Tuner private data */
  70        u32 current_frequency;
  71};
  72
  73
  74/* Write buffer to demod */
  75static int or51132_writebuf(struct or51132_state *state, const u8 *buf, int len)
  76{
  77        int err;
  78        struct i2c_msg msg = { .addr = state->config->demod_address,
  79                               .flags = 0, .buf = (u8*)buf, .len = len };
  80
  81        /* msleep(20); */ /* doesn't appear to be necessary */
  82        if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
  83                printk(KERN_WARNING "or51132: I2C write (addr 0x%02x len %d) error: %d\n",
  84                       msg.addr, msg.len, err);
  85                return -EREMOTEIO;
  86        }
  87        return 0;
  88}
  89
  90/* Write constant bytes, e.g. or51132_writebytes(state, 0x04, 0x42, 0x00);
  91   Less code and more efficient that loading a buffer on the stack with
  92   the bytes to send and then calling or51132_writebuf() on that. */
  93#define or51132_writebytes(state, data...)  \
  94        ({ static const u8 _data[] = {data}; \
  95        or51132_writebuf(state, _data, sizeof(_data)); })
  96
  97/* Read data from demod into buffer.  Returns 0 on success. */
  98static int or51132_readbuf(struct or51132_state *state, u8 *buf, int len)
  99{
 100        int err;
 101        struct i2c_msg msg = { .addr = state->config->demod_address,
 102                               .flags = I2C_M_RD, .buf = buf, .len = len };
 103
 104        /* msleep(20); */ /* doesn't appear to be necessary */
 105        if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
 106                printk(KERN_WARNING "or51132: I2C read (addr 0x%02x len %d) error: %d\n",
 107                       msg.addr, msg.len, err);
 108                return -EREMOTEIO;
 109        }
 110        return 0;
 111}
 112
 113/* Reads a 16-bit demod register.  Returns <0 on error. */
 114static int or51132_readreg(struct or51132_state *state, u8 reg)
 115{
 116        u8 buf[2] = { 0x04, reg };
 117        struct i2c_msg msg[2] = {
 118                {.addr = state->config->demod_address, .flags = 0,
 119                 .buf = buf, .len = 2 },
 120                {.addr = state->config->demod_address, .flags = I2C_M_RD,
 121                 .buf = buf, .len = 2 }};
 122        int err;
 123
 124        if ((err = i2c_transfer(state->i2c, msg, 2)) != 2) {
 125                printk(KERN_WARNING "or51132: I2C error reading register %d: %d\n",
 126                       reg, err);
 127                return -EREMOTEIO;
 128        }
 129        return buf[0] | (buf[1] << 8);
 130}
 131
 132static int or51132_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
 133{
 134        struct or51132_state* state = fe->demodulator_priv;
 135        static const u8 run_buf[] = {0x7F,0x01};
 136        u8 rec_buf[8];
 137        u32 firmwareAsize, firmwareBsize;
 138        int i,ret;
 139
 140        dprintk("Firmware is %Zd bytes\n",fw->size);
 141
 142        /* Get size of firmware A and B */
 143        firmwareAsize = le32_to_cpu(*((__le32*)fw->data));
 144        dprintk("FirmwareA is %i bytes\n",firmwareAsize);
 145        firmwareBsize = le32_to_cpu(*((__le32*)(fw->data+4)));
 146        dprintk("FirmwareB is %i bytes\n",firmwareBsize);
 147
 148        /* Upload firmware */
 149        if ((ret = or51132_writebuf(state, &fw->data[8], firmwareAsize))) {
 150                printk(KERN_WARNING "or51132: load_firmware error 1\n");
 151                return ret;
 152        }
 153        if ((ret = or51132_writebuf(state, &fw->data[8+firmwareAsize],
 154                                    firmwareBsize))) {
 155                printk(KERN_WARNING "or51132: load_firmware error 2\n");
 156                return ret;
 157        }
 158
 159        if ((ret = or51132_writebuf(state, run_buf, 2))) {
 160                printk(KERN_WARNING "or51132: load_firmware error 3\n");
 161                return ret;
 162        }
 163        if ((ret = or51132_writebuf(state, run_buf, 2))) {
 164                printk(KERN_WARNING "or51132: load_firmware error 4\n");
 165                return ret;
 166        }
 167
 168        /* 50ms for operation to begin */
 169        msleep(50);
 170
 171        /* Read back ucode version to besure we loaded correctly and are really up and running */
 172        /* Get uCode version */
 173        if ((ret = or51132_writebytes(state, 0x10, 0x10, 0x00))) {
 174                printk(KERN_WARNING "or51132: load_firmware error a\n");
 175                return ret;
 176        }
 177        if ((ret = or51132_writebytes(state, 0x04, 0x17))) {
 178                printk(KERN_WARNING "or51132: load_firmware error b\n");
 179                return ret;
 180        }
 181        if ((ret = or51132_writebytes(state, 0x00, 0x00))) {
 182                printk(KERN_WARNING "or51132: load_firmware error c\n");
 183                return ret;
 184        }
 185        for (i=0;i<4;i++) {
 186                /* Once upon a time, this command might have had something
 187                   to do with getting the firmware version, but it's
 188                   not used anymore:
 189                   {0x04,0x00,0x30,0x00,i+1} */
 190                /* Read 8 bytes, two bytes at a time */
 191                if ((ret = or51132_readbuf(state, &rec_buf[i*2], 2))) {
 192                        printk(KERN_WARNING
 193                               "or51132: load_firmware error d - %d\n",i);
 194                        return ret;
 195                }
 196        }
 197
 198        printk(KERN_WARNING
 199               "or51132: Version: %02X%02X%02X%02X-%02X%02X%02X%02X (%02X%01X-%01X-%02X%01X-%01X)\n",
 200               rec_buf[1],rec_buf[0],rec_buf[3],rec_buf[2],
 201               rec_buf[5],rec_buf[4],rec_buf[7],rec_buf[6],
 202               rec_buf[3],rec_buf[2]>>4,rec_buf[2]&0x0f,
 203               rec_buf[5],rec_buf[4]>>4,rec_buf[4]&0x0f);
 204
 205        if ((ret = or51132_writebytes(state, 0x10, 0x00, 0x00))) {
 206                printk(KERN_WARNING "or51132: load_firmware error e\n");
 207                return ret;
 208        }
 209        return 0;
 210};
 211
 212static int or51132_init(struct dvb_frontend* fe)
 213{
 214        return 0;
 215}
 216
 217static int or51132_read_ber(struct dvb_frontend* fe, u32* ber)
 218{
 219        *ber = 0;
 220        return 0;
 221}
 222
 223static int or51132_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 224{
 225        *ucblocks = 0;
 226        return 0;
 227}
 228
 229static int or51132_sleep(struct dvb_frontend* fe)
 230{
 231        return 0;
 232}
 233
 234static int or51132_setmode(struct dvb_frontend* fe)
 235{
 236        struct or51132_state* state = fe->demodulator_priv;
 237        u8 cmd_buf1[3] = {0x04, 0x01, 0x5f};
 238        u8 cmd_buf2[3] = {0x1c, 0x00, 0 };
 239
 240        dprintk("setmode %d\n",(int)state->current_modulation);
 241
 242        switch (state->current_modulation) {
 243        case VSB_8:
 244                /* Auto CH, Auto NTSC rej, MPEGser, MPEG2tr, phase noise-high */
 245                cmd_buf1[2] = 0x50;
 246                /* REC MODE inv IF spectrum, Normal */
 247                cmd_buf2[1] = 0x03;
 248                /* Channel MODE ATSC/VSB8 */
 249                cmd_buf2[2] = 0x06;
 250                break;
 251        /* All QAM modes are:
 252           Auto-deinterleave; MPEGser, MPEG2tr, phase noise-high
 253           REC MODE Normal Carrier Lock */
 254        case QAM_AUTO:
 255                /* Channel MODE Auto QAM64/256 */
 256                cmd_buf2[2] = 0x4f;
 257                break;
 258        case QAM_256:
 259                /* Channel MODE QAM256 */
 260                cmd_buf2[2] = 0x45;
 261                break;
 262        case QAM_64:
 263                /* Channel MODE QAM64 */
 264                cmd_buf2[2] = 0x43;
 265                break;
 266        default:
 267                printk(KERN_WARNING
 268                       "or51132: setmode: Modulation set to unsupported value (%d)\n",
 269                       state->current_modulation);
 270                return -EINVAL;
 271        }
 272
 273        /* Set Receiver 1 register */
 274        if (or51132_writebuf(state, cmd_buf1, 3)) {
 275                printk(KERN_WARNING "or51132: set_mode error 1\n");
 276                return -EREMOTEIO;
 277        }
 278        dprintk("set #1 to %02x\n", cmd_buf1[2]);
 279
 280        /* Set operation mode in Receiver 6 register */
 281        if (or51132_writebuf(state, cmd_buf2, 3)) {
 282                printk(KERN_WARNING "or51132: set_mode error 2\n");
 283                return -EREMOTEIO;
 284        }
 285        dprintk("set #6 to 0x%02x%02x\n", cmd_buf2[1], cmd_buf2[2]);
 286
 287        return 0;
 288}
 289
 290/* Some modulations use the same firmware.  This classifies modulations
 291   by the firmware they use. */
 292#define MOD_FWCLASS_UNKNOWN     0
 293#define MOD_FWCLASS_VSB         1
 294#define MOD_FWCLASS_QAM         2
 295static int modulation_fw_class(enum fe_modulation modulation)
 296{
 297        switch(modulation) {
 298        case VSB_8:
 299                return MOD_FWCLASS_VSB;
 300        case QAM_AUTO:
 301        case QAM_64:
 302        case QAM_256:
 303                return MOD_FWCLASS_QAM;
 304        default:
 305                return MOD_FWCLASS_UNKNOWN;
 306        }
 307}
 308
 309static int or51132_set_parameters(struct dvb_frontend *fe)
 310{
 311        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 312        int ret;
 313        struct or51132_state* state = fe->demodulator_priv;
 314        const struct firmware *fw;
 315        const char *fwname;
 316        int clock_mode;
 317
 318        /* Upload new firmware only if we need a different one */
 319        if (modulation_fw_class(state->current_modulation) !=
 320            modulation_fw_class(p->modulation)) {
 321                switch (modulation_fw_class(p->modulation)) {
 322                case MOD_FWCLASS_VSB:
 323                        dprintk("set_parameters VSB MODE\n");
 324                        fwname = OR51132_VSB_FIRMWARE;
 325
 326                        /* Set non-punctured clock for VSB */
 327                        clock_mode = 0;
 328                        break;
 329                case MOD_FWCLASS_QAM:
 330                        dprintk("set_parameters QAM MODE\n");
 331                        fwname = OR51132_QAM_FIRMWARE;
 332
 333                        /* Set punctured clock for QAM */
 334                        clock_mode = 1;
 335                        break;
 336                default:
 337                        printk("or51132: Modulation type(%d) UNSUPPORTED\n",
 338                               p->modulation);
 339                        return -1;
 340                }
 341                printk("or51132: Waiting for firmware upload(%s)...\n",
 342                       fwname);
 343                ret = request_firmware(&fw, fwname, state->i2c->dev.parent);
 344                if (ret) {
 345                        printk(KERN_WARNING "or51132: No firmware up"
 346                               "loaded(timeout or file not found?)\n");
 347                        return ret;
 348                }
 349                ret = or51132_load_firmware(fe, fw);
 350                release_firmware(fw);
 351                if (ret) {
 352                        printk(KERN_WARNING "or51132: Writing firmware to "
 353                               "device failed!\n");
 354                        return ret;
 355                }
 356                printk("or51132: Firmware upload complete.\n");
 357                state->config->set_ts_params(fe, clock_mode);
 358        }
 359        /* Change only if we are actually changing the modulation */
 360        if (state->current_modulation != p->modulation) {
 361                state->current_modulation = p->modulation;
 362                or51132_setmode(fe);
 363        }
 364
 365        if (fe->ops.tuner_ops.set_params) {
 366                fe->ops.tuner_ops.set_params(fe);
 367                if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 368        }
 369
 370        /* Set to current mode */
 371        or51132_setmode(fe);
 372
 373        /* Update current frequency */
 374        state->current_frequency = p->frequency;
 375        return 0;
 376}
 377
 378static int or51132_get_parameters(struct dvb_frontend* fe)
 379{
 380        struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 381        struct or51132_state* state = fe->demodulator_priv;
 382        int status;
 383        int retry = 1;
 384
 385start:
 386        /* Receiver Status */
 387        if ((status = or51132_readreg(state, 0x00)) < 0) {
 388                printk(KERN_WARNING "or51132: get_parameters: error reading receiver status\n");
 389                return -EREMOTEIO;
 390        }
 391        switch(status&0xff) {
 392        case 0x06:
 393                p->modulation = VSB_8;
 394                break;
 395        case 0x43:
 396                p->modulation = QAM_64;
 397                break;
 398        case 0x45:
 399                p->modulation = QAM_256;
 400                break;
 401        default:
 402                if (retry--)
 403                        goto start;
 404                printk(KERN_WARNING "or51132: unknown status 0x%02x\n",
 405                       status&0xff);
 406                return -EREMOTEIO;
 407        }
 408
 409        /* FIXME: Read frequency from frontend, take AFC into account */
 410        p->frequency = state->current_frequency;
 411
 412        /* FIXME: How to read inversion setting? Receiver 6 register? */
 413        p->inversion = INVERSION_AUTO;
 414
 415        return 0;
 416}
 417
 418static int or51132_read_status(struct dvb_frontend *fe, enum fe_status *status)
 419{
 420        struct or51132_state* state = fe->demodulator_priv;
 421        int reg;
 422
 423        /* Receiver Status */
 424        if ((reg = or51132_readreg(state, 0x00)) < 0) {
 425                printk(KERN_WARNING "or51132: read_status: error reading receiver status: %d\n", reg);
 426                *status = 0;
 427                return -EREMOTEIO;
 428        }
 429        dprintk("%s: read_status %04x\n", __func__, reg);
 430
 431        if (reg & 0x0100) /* Receiver Lock */
 432                *status = FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|
 433                          FE_HAS_SYNC|FE_HAS_LOCK;
 434        else
 435                *status = 0;
 436        return 0;
 437}
 438
 439/* Calculate SNR estimation (scaled by 2^24)
 440
 441   8-VSB SNR and QAM equations from Oren datasheets
 442
 443   For 8-VSB:
 444     SNR[dB] = 10 * log10(897152044.8282 / MSE^2 ) - K
 445
 446     Where K = 0 if NTSC rejection filter is OFF; and
 447           K = 3 if NTSC rejection filter is ON
 448
 449   For QAM64:
 450     SNR[dB] = 10 * log10(897152044.8282 / MSE^2 )
 451
 452   For QAM256:
 453     SNR[dB] = 10 * log10(907832426.314266  / MSE^2 )
 454
 455   We re-write the snr equation as:
 456     SNR * 2^24 = 10*(c - 2*intlog10(MSE))
 457   Where for QAM256, c = log10(907832426.314266) * 2^24
 458   and for 8-VSB and QAM64, c = log10(897152044.8282) * 2^24 */
 459
 460static u32 calculate_snr(u32 mse, u32 c)
 461{
 462        if (mse == 0) /* No signal */
 463                return 0;
 464
 465        mse = 2*intlog10(mse);
 466        if (mse > c) {
 467                /* Negative SNR, which is possible, but realisticly the
 468                demod will lose lock before the signal gets this bad.  The
 469                API only allows for unsigned values, so just return 0 */
 470                return 0;
 471        }
 472        return 10*(c - mse);
 473}
 474
 475static int or51132_read_snr(struct dvb_frontend* fe, u16* snr)
 476{
 477        struct or51132_state* state = fe->demodulator_priv;
 478        int noise, reg;
 479        u32 c, usK = 0;
 480        int retry = 1;
 481
 482start:
 483        /* SNR after Equalizer */
 484        noise = or51132_readreg(state, 0x02);
 485        if (noise < 0) {
 486                printk(KERN_WARNING "or51132: read_snr: error reading equalizer\n");
 487                return -EREMOTEIO;
 488        }
 489        dprintk("read_snr noise (%d)\n", noise);
 490
 491        /* Read status, contains modulation type for QAM_AUTO and
 492           NTSC filter for VSB */
 493        reg = or51132_readreg(state, 0x00);
 494        if (reg < 0) {
 495                printk(KERN_WARNING "or51132: read_snr: error reading receiver status\n");
 496                return -EREMOTEIO;
 497        }
 498
 499        switch (reg&0xff) {
 500        case 0x06:
 501                if (reg & 0x1000) usK = 3 << 24;
 502                /* Fall through to QAM64 case */
 503        case 0x43:
 504                c = 150204167;
 505                break;
 506        case 0x45:
 507                c = 150290396;
 508                break;
 509        default:
 510                printk(KERN_WARNING "or51132: unknown status 0x%02x\n", reg&0xff);
 511                if (retry--) goto start;
 512                return -EREMOTEIO;
 513        }
 514        dprintk("%s: modulation %02x, NTSC rej O%s\n", __func__,
 515                reg&0xff, reg&0x1000?"n":"ff");
 516
 517        /* Calculate SNR using noise, c, and NTSC rejection correction */
 518        state->snr = calculate_snr(noise, c) - usK;
 519        *snr = (state->snr) >> 16;
 520
 521        dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise,
 522                state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
 523
 524        return 0;
 525}
 526
 527static int or51132_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 528{
 529        /* Calculate Strength from SNR up to 35dB */
 530        /* Even though the SNR can go higher than 35dB, there is some comfort */
 531        /* factor in having a range of strong signals that can show at 100%   */
 532        struct or51132_state* state = (struct or51132_state*) fe->demodulator_priv;
 533        u16 snr;
 534        int ret;
 535
 536        ret = fe->ops.read_snr(fe, &snr);
 537        if (ret != 0)
 538                return ret;
 539        /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
 540        /* scale the range 0 - 35*2^24 into 0 - 65535 */
 541        if (state->snr >= 8960 * 0x10000)
 542                *strength = 0xffff;
 543        else
 544                *strength = state->snr / 8960;
 545
 546        return 0;
 547}
 548
 549static int or51132_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings)
 550{
 551        fe_tune_settings->min_delay_ms = 500;
 552        fe_tune_settings->step_size = 0;
 553        fe_tune_settings->max_drift = 0;
 554
 555        return 0;
 556}
 557
 558static void or51132_release(struct dvb_frontend* fe)
 559{
 560        struct or51132_state* state = fe->demodulator_priv;
 561        kfree(state);
 562}
 563
 564static struct dvb_frontend_ops or51132_ops;
 565
 566struct dvb_frontend* or51132_attach(const struct or51132_config* config,
 567                                    struct i2c_adapter* i2c)
 568{
 569        struct or51132_state* state = NULL;
 570
 571        /* Allocate memory for the internal state */
 572        state = kzalloc(sizeof(struct or51132_state), GFP_KERNEL);
 573        if (state == NULL)
 574                return NULL;
 575
 576        /* Setup the state */
 577        state->config = config;
 578        state->i2c = i2c;
 579        state->current_frequency = -1;
 580        state->current_modulation = -1;
 581
 582        /* Create dvb_frontend */
 583        memcpy(&state->frontend.ops, &or51132_ops, sizeof(struct dvb_frontend_ops));
 584        state->frontend.demodulator_priv = state;
 585        return &state->frontend;
 586}
 587
 588static struct dvb_frontend_ops or51132_ops = {
 589        .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
 590        .info = {
 591                .name                   = "Oren OR51132 VSB/QAM Frontend",
 592                .frequency_min          = 44000000,
 593                .frequency_max          = 958000000,
 594                .frequency_stepsize     = 166666,
 595                .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 596                        FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 597                        FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_QAM_AUTO |
 598                        FE_CAN_8VSB
 599        },
 600
 601        .release = or51132_release,
 602
 603        .init = or51132_init,
 604        .sleep = or51132_sleep,
 605
 606        .set_frontend = or51132_set_parameters,
 607        .get_frontend = or51132_get_parameters,
 608        .get_tune_settings = or51132_get_tune_settings,
 609
 610        .read_status = or51132_read_status,
 611        .read_ber = or51132_read_ber,
 612        .read_signal_strength = or51132_read_signal_strength,
 613        .read_snr = or51132_read_snr,
 614        .read_ucblocks = or51132_read_ucblocks,
 615};
 616
 617module_param(debug, int, 0644);
 618MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 619
 620MODULE_DESCRIPTION("OR51132 ATSC [pcHDTV HD-3000] (8VSB & ITU J83 AnnexB FEC QAM64/256) Demodulator Driver");
 621MODULE_AUTHOR("Kirk Lapray");
 622MODULE_AUTHOR("Trent Piepho");
 623MODULE_LICENSE("GPL");
 624
 625EXPORT_SYMBOL(or51132_attach);
 626