sound/oss/mpu401.c

   1 /*
   2  * sound/mpu401.c
   3  *
   4  * The low level driver for Roland MPU-401 compatible Midi cards.
   5  */
   6 /*
   7  * Copyright (C) by Hannu Savolainen 1993-1997
   8  *
   9  * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
  10  * Version 2 (June 1991). See the "COPYING" file distributed with this software
  11  * for more info.
  12  *
  13  *
  14  * Thomas Sailer        ioctl code reworked (vmalloc/vfree removed)
  15  * Alan Cox             modularisation, use normal request_irq, use dev_id
  16  * Bartlomiej Zolnierkiewicz    removed some __init to allow using many drivers
  17  * Chris Rankin         Update the module-usage counter for the coprocessor
  18  * Zwane Mwaikambo      Changed attach/unload resource freeing
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/init.h>
  23 #include <linux/interrupt.h>
  24 #include <linux/spinlock.h>
  25 #define USE_SEQ_MACROS
  26 #define USE_SIMPLE_MACROS
  27
  28 #include "sound_config.h"
  29
  30 #include "coproc.h"
  31 #include "mpu401.h"
  32
  33 static int      timer_mode = TMR_INTERNAL, timer_caps = TMR_INTERNAL;
  34
  35 struct mpu_config
  36 {
  37         int             base;   /*
  38                                  * I/O base
  39                                  */
  40         int             irq;
  41         int             opened; /*
  42                                  * Open mode
  43                                  */
  44         int             devno;
  45         int             synthno;
  46         int             uart_mode;
  47         int             initialized;
  48         int             mode;
  49 #define MODE_MIDI       1
  50 #define MODE_SYNTH      2
  51         unsigned char   version, revision;
  52         unsigned int    capabilities;
  53 #define MPU_CAP_INTLG   0x10000000
  54 #define MPU_CAP_SYNC    0x00000010
  55 #define MPU_CAP_FSK     0x00000020
  56 #define MPU_CAP_CLS     0x00000040
  57 #define MPU_CAP_SMPTE   0x00000080
  58 #define MPU_CAP_2PORT   0x00000001
  59         int             timer_flag;
  60
  61 #define MBUF_MAX        10
  62 #define BUFTEST(dc) if (dc->m_ptr >= MBUF_MAX || dc->m_ptr < 0) \
  63         {printk( "MPU: Invalid buffer pointer %d/%d, s=%d\n",  dc->m_ptr,  dc->m_left,  dc->m_state);dc->m_ptr--;}
  64           int             m_busy;
  65           unsigned char   m_buf[MBUF_MAX];
  66           int             m_ptr;
  67           int             m_state;
  68           int             m_left;
  69           unsigned char   last_status;
  70           void            (*inputintr) (int dev, unsigned char data);
  71           int             shared_irq;
  72           int            *osp;
  73           spinlock_t    lock;
  74   };
  75
  76 #define DATAPORT(base)   (base)
  77 #define COMDPORT(base)   (base+1)
  78 #define STATPORT(base)   (base+1)
  79
  80
  81 static void mpu401_close(int dev);
  82
  83 static inline int mpu401_status(struct mpu_config *devc)
  84 {
  85         return inb(STATPORT(devc->base));
  86 }
  87
  88 #define input_avail(devc)               (!(mpu401_status(devc)&INPUT_AVAIL))
  89 #define output_ready(devc)              (!(mpu401_status(devc)&OUTPUT_READY))
  90
  91 static inline void write_command(struct mpu_config *devc, unsigned char cmd)
  92 {
  93         outb(cmd, COMDPORT(devc->base));
  94 }
  95
  96 static inline int read_data(struct mpu_config *devc)
  97 {
  98         return inb(DATAPORT(devc->base));
  99 }
 100
 101 static inline void write_data(struct mpu_config *devc, unsigned char byte)
 102 {
 103         outb(byte, DATAPORT(devc->base));
 104 }
 105
 106 #define OUTPUT_READY    0x40
 107 #define INPUT_AVAIL     0x80
 108 #define MPU_ACK         0xFE
 109 #define MPU_RESET       0xFF
 110 #define UART_MODE_ON    0x3F
 111
 112 static struct mpu_config dev_conf[MAX_MIDI_DEV];
 113
 114 static int n_mpu_devs;
 115
 116 static int reset_mpu401(struct mpu_config *devc);
 117 static void set_uart_mode(int dev, struct mpu_config *devc, int arg);
 118
 119 static int mpu_timer_init(int midi_dev);
 120 static void mpu_timer_interrupt(void);
 121 static void timer_ext_event(struct mpu_config *devc, int event, int parm);
 122
 123 static struct synth_info mpu_synth_info_proto = {
 124         "MPU-401 MIDI interface",
 125         0,
 126         SYNTH_TYPE_MIDI,
 127         MIDI_TYPE_MPU401,
 128         0, 128,
 129         0, 128,
 130         SYNTH_CAP_INPUT
 131 };
 132
 133 static struct synth_info mpu_synth_info[MAX_MIDI_DEV];
 134
 135 /*
 136  * States for the input scanner
 137  */
 138
 139 #define ST_INIT                 0       /* Ready for timing byte or msg */
 140 #define ST_TIMED                1       /* Leading timing byte rcvd */
 141 #define ST_DATABYTE             2       /* Waiting for (nr_left) data bytes */
 142
 143 #define ST_SYSMSG               100     /* System message (sysx etc). */
 144 #define ST_SYSEX                101     /* System exclusive msg */
 145 #define ST_MTC                  102     /* Midi Time Code (MTC) qframe msg */
 146 #define ST_SONGSEL              103     /* Song select */
 147 #define ST_SONGPOS              104     /* Song position pointer */
 148
 149 static unsigned char len_tab[] =        /* # of data bytes following a status
 150                                          */
 151 {
 152         2,                      /* 8x */
 153         2,                      /* 9x */
 154         2,                      /* Ax */
 155         2,                      /* Bx */
 156         1,                      /* Cx */
 157         1,                      /* Dx */
 158         2,                      /* Ex */
 159         0                       /* Fx */
 160 };
 161
 162 #define STORE(cmd) \
 163 { \
 164         int len; \
 165         unsigned char obuf[8]; \
 166         cmd; \
 167         seq_input_event(obuf, len); \
 168 }
 169
 170 #define _seqbuf obuf
 171 #define _seqbufptr 0
 172 #define _SEQ_ADVBUF(x) len=x
 173
 174 static int mpu_input_scanner(struct mpu_config *devc, unsigned char midic)
 175 {
 176
 177         switch (devc->m_state)
 178         {
 179                 case ST_INIT:
 180                         switch (midic)
 181                         {
 182                                 case 0xf8:
 183                                 /* Timer overflow */
 184                                         break;
 185
 186                                 case 0xfc:
 187                                         printk("<all end>");
 188                                         break;
 189
 190                                 case 0xfd:
 191                                         if (devc->timer_flag)
 192                                                 mpu_timer_interrupt();
 193                                         break;
 194
 195                                 case 0xfe:
 196                                         return MPU_ACK;
 197
 198                                 case 0xf0:
 199                                 case 0xf1:
 200                                 case 0xf2:
 201                                 case 0xf3:
 202                                 case 0xf4:
 203                                 case 0xf5:
 204                                 case 0xf6:
 205                                 case 0xf7:
 206                                         printk("<Trk data rq #%d>", midic & 0x0f);
 207                                         break;
 208
 209                                 case 0xf9:
 210                                         printk("<conductor rq>");
 211                                         break;
 212
 213                                 case 0xff:
 214                                         devc->m_state = ST_SYSMSG;
 215                                         break;
 216
 217                                 default:
 218                                         if (midic <= 0xef)
 219                                         {
 220                                                 /* printk( "mpu time: %d ",  midic); */
 221                                                 devc->m_state = ST_TIMED;
 222                                         }
 223                                         else
 224                                                 printk("<MPU: Unknown event %02x> ", midic);
 225                         }
 226                         break;
 227
 228                 case ST_TIMED:
 229                         {
 230                                 int msg = ((int) (midic & 0xf0) >> 4);
 231
 232                                 devc->m_state = ST_DATABYTE;
 233
 234                                 if (msg < 8)    /* Data byte */
 235                                 {
 236                                         /* printk( "midi msg (running status) "); */
 237                                         msg = ((int) (devc->last_status & 0xf0) >> 4);
 238                                         msg -= 8;
 239                                         devc->m_left = len_tab[msg] - 1;
 240
 241                                         devc->m_ptr = 2;
 242                                         devc->m_buf[0] = devc->last_status;
 243                                         devc->m_buf[1] = midic;
 244
 245                                         if (devc->m_left <= 0)
 246                                         {
 247                                                 devc->m_state = ST_INIT;
 248                                                 do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr);
 249                                                 devc->m_ptr = 0;
 250                                         }
 251                                 }
 252                                 else if (msg == 0xf)    /* MPU MARK */
 253                                 {
 254                                         devc->m_state = ST_INIT;
 255
 256                                         switch (midic)
 257                                         {
 258                                                 case 0xf8:
 259                                                         /* printk( "NOP "); */
 260                                                         break;
 261
 262                                                 case 0xf9:
 263                                                         /* printk( "meas end "); */
 264                                                         break;
 265
 266                                                 case 0xfc:
 267                                                         /* printk( "data end "); */
 268                                                         break;
 269
 270                                                 default:
 271                                                         printk("Unknown MPU mark %02x\n", midic);
 272                                         }
 273                                 }
 274                                 else
 275                                 {
 276                                         devc->last_status = midic;
 277                                         /* printk( "midi msg "); */
 278                                         msg -= 8;
 279                                         devc->m_left = len_tab[msg];
 280
 281                                         devc->m_ptr = 1;
 282                                         devc->m_buf[0] = midic;
 283
 284                                         if (devc->m_left <= 0)
 285                                         {
 286                                                 devc->m_state = ST_INIT;
 287                                                 do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr);
 288                                                 devc->m_ptr = 0;
 289                                         }
 290                                 }
 291                         }
 292                         break;
 293
 294                 case ST_SYSMSG:
 295                         switch (midic)
 296                         {
 297                                 case 0xf0:
 298                                         printk("<SYX>");
 299                                         devc->m_state = ST_SYSEX;
 300                                         break;
 301
 302                                 case 0xf1:
 303                                         devc->m_state = ST_MTC;
 304                                         break;
 305
 306                                 case 0xf2:
 307                                         devc->m_state = ST_SONGPOS;
 308                                         devc->m_ptr = 0;
 309                                         break;
 310
 311                                 case 0xf3:
 312                                         devc->m_state = ST_SONGSEL;
 313                                         break;
 314
 315                                 case 0xf6:
 316                                         /* printk( "tune_request\n"); */
 317                                         devc->m_state = ST_INIT;
 318
 319                                         /*
 320                                          *    Real time messages
 321                                          */
 322                                 case 0xf8:
 323                                         /* midi clock */
 324                                         devc->m_state = ST_INIT;
 325                                         timer_ext_event(devc, TMR_CLOCK, 0);
 326                                         break;
 327
 328                                 case 0xfA:
 329                                         devc->m_state = ST_INIT;
 330                                         timer_ext_event(devc, TMR_START, 0);
 331                                         break;
 332
 333                                 case 0xFB:
 334                                         devc->m_state = ST_INIT;
 335                                         timer_ext_event(devc, TMR_CONTINUE, 0);
 336                                         break;
 337
 338                                 case 0xFC:
 339                                         devc->m_state = ST_INIT;
 340                                         timer_ext_event(devc, TMR_STOP, 0);
 341                                         break;
 342
 343                                 case 0xFE:
 344                                         /* active sensing */
 345                                         devc->m_state = ST_INIT;
 346                                         break;
 347
 348                                 case 0xff:
 349                                         /* printk( "midi hard reset"); */
 350                                         devc->m_state = ST_INIT;
 351                                         break;
 352
 353                                 default:
 354                                         printk("unknown MIDI sysmsg %0x\n", midic);
 355                                         devc->m_state = ST_INIT;
 356                         }
 357                         break;
 358
 359                 case ST_MTC:
 360                         devc->m_state = ST_INIT;
 361                         printk("MTC frame %x02\n", midic);
 362                         break;
 363
 364                 case ST_SYSEX:
 365                         if (midic == 0xf7)
 366                         {
 367                                 printk("<EOX>");
 368                                 devc->m_state = ST_INIT;
 369                         }
 370                         else
 371                                 printk("%02x ", midic);
 372                         break;
 373
 374                 case ST_SONGPOS:
 375                         BUFTEST(devc);
 376                         devc->m_buf[devc->m_ptr++] = midic;
 377                         if (devc->m_ptr == 2)
 378                         {
 379                                 devc->m_state = ST_INIT;
 380                                 devc->m_ptr = 0;
 381                                 timer_ext_event(devc, TMR_SPP,
 382                                         ((devc->m_buf[1] & 0x7f) << 7) |
 383                                         (devc->m_buf[0] & 0x7f));
 384                         }
 385                         break;
 386
 387                 case ST_DATABYTE:
 388                         BUFTEST(devc);
 389                         devc->m_buf[devc->m_ptr++] = midic;
 390                         if ((--devc->m_left) <= 0)
 391                         {
 392                                 devc->m_state = ST_INIT;
 393                                 do_midi_msg(devc->synthno, devc->m_buf, devc->m_ptr);
 394                                 devc->m_ptr = 0;
 395                         }
 396                         break;
 397
 398                 default:
 399                         printk("Bad state %d ", devc->m_state);
 400                         devc->m_state = ST_INIT;
 401         }
 402         return 1;
 403 }
 404
 405 static void mpu401_input_loop(struct mpu_config *devc)
 406 {
 407         unsigned long flags;
 408         int busy;
 409         int n;
 410
 411         spin_lock_irqsave(&devc->lock,flags);
 412         busy = devc->m_busy;
 413         devc->m_busy = 1;
 414         spin_unlock_irqrestore(&devc->lock,flags);
 415
 416         if (busy)               /* Already inside the scanner */
 417                 return;
 418
 419         n = 50;
 420
 421         while (input_avail(devc) && n-- > 0)
 422         {
 423                 unsigned char c = read_data(devc);
 424
 425                 if (devc->mode == MODE_SYNTH)
 426                 {
 427                         mpu_input_scanner(devc, c);
 428                 }
 429                 else if (devc->opened & OPEN_READ && devc->inputintr != NULL)
 430                         devc->inputintr(devc->devno, c);
 431         }
 432         devc->m_busy = 0;
 433 }
 434
 435 int intchk_mpu401(void *dev_id)
 436 {
 437         struct mpu_config *devc;
 438         int dev = (int) dev_id;
 439
 440         devc = &dev_conf[dev];
 441         return input_avail(devc);
 442 }
 443
 444 irqreturn_t mpuintr(int irq, void *dev_id, struct pt_regs *dummy)
 445 {
 446         struct mpu_config *devc;
 447         int dev = (int) dev_id;
 448         int handled = 0;
 449
 450         devc = &dev_conf[dev];
 451
 452         if (input_avail(devc))
 453         {
 454                 handled = 1;
 455                 if (devc->base != 0 && (devc->opened & OPEN_READ || devc->mode == MODE_SYNTH))
 456                         mpu401_input_loop(devc);
 457                 else
 458                 {
 459                         /* Dummy read (just to acknowledge the interrupt) */
 460                         read_data(devc);
 461                 }
 462         }
 463         return IRQ_RETVAL(handled);
 464 }
 465
 466 static int mpu401_open(int dev, int mode,
 467             void            (*input) (int dev, unsigned char data),
 468             void            (*output) (int dev)
 469 )
 470 {
 471         int err;
 472         struct mpu_config *devc;
 473         struct coproc_operations *coprocessor;
 474
 475         if (dev < 0 || dev >= num_midis || midi_devs[dev] == NULL)
 476                 return -ENXIO;
 477
 478         devc = &dev_conf[dev];
 479
 480         if (devc->opened)
 481                   return -EBUSY;
 482         /*
 483          *  Verify that the device is really running.
 484          *  Some devices (such as Ensoniq SoundScape don't
 485          *  work before the on board processor (OBP) is initialized
 486          *  by downloading its microcode.
 487          */
 488
 489         if (!devc->initialized)
 490         {
 491                 if (mpu401_status(devc) == 0xff)        /* Bus float */
 492                 {
 493                         printk(KERN_ERR "mpu401: Device not initialized properly\n");
 494                         return -EIO;
 495                 }
 496                 reset_mpu401(devc);
 497         }
 498
 499         if ( (coprocessor = midi_devs[dev]->coproc) != NULL )
 500         {
 501                 if (!try_module_get(coprocessor->owner)) {
 502                         mpu401_close(dev);
 503                         return -ENODEV;
 504                 }
 505
 506                 if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0)
 507                 {
 508                         printk(KERN_WARNING "MPU-401: Can't access coprocessor device\n");
 509                         mpu401_close(dev);
 510                         return err;
 511                 }
 512         }
 513
 514         set_uart_mode(dev, devc, 1);
 515         devc->mode = MODE_MIDI;
 516         devc->synthno = 0;
 517
 518         mpu401_input_loop(devc);
 519
 520         devc->inputintr = input;
 521         devc->opened = mode;
 522
 523         return 0;
 524 }
 525
 526 static void mpu401_close(int dev)
 527 {
 528         struct mpu_config *devc;
 529         struct coproc_operations *coprocessor;
 530
 531         devc = &dev_conf[dev];
 532         if (devc->uart_mode)
 533                 reset_mpu401(devc);     /*
 534                                          * This disables the UART mode
 535                                          */
 536         devc->mode = 0;
 537         devc->inputintr = NULL;
 538
 539         coprocessor = midi_devs[dev]->coproc;
 540         if (coprocessor) {
 541                 coprocessor->close(coprocessor->devc, COPR_MIDI);
 542                 module_put(coprocessor->owner);
 543         }
 544         devc->opened = 0;
 545 }
 546
 547 static int mpu401_out(int dev, unsigned char midi_byte)
 548 {
 549         int timeout;
 550         unsigned long flags;
 551
 552         struct mpu_config *devc;
 553
 554         devc = &dev_conf[dev];
 555
 556         /*
 557          * Sometimes it takes about 30000 loops before the output becomes ready
 558          * (After reset). Normally it takes just about 10 loops.
 559          */
 560
 561         for (timeout = 30000; timeout > 0 && !output_ready(devc); timeout--);
 562
 563         spin_lock_irqsave(&devc->lock,flags);
 564         if (!output_ready(devc))
 565         {
 566                 printk(KERN_WARNING "mpu401: Send data timeout\n");
 567                 spin_unlock_irqrestore(&devc->lock,flags);
 568                 return 0;
 569         }
 570         write_data(devc, midi_byte);
 571         spin_unlock_irqrestore(&devc->lock,flags);
 572         return 1;
 573 }
 574
 575 static int mpu401_command(int dev, mpu_command_rec * cmd)
 576 {
 577         int i, timeout, ok;
 578         int ret = 0;
 579         unsigned long   flags;
 580         struct mpu_config *devc;
 581
 582         devc = &dev_conf[dev];
 583
 584         if (devc->uart_mode)    /*
 585                                  * Not possible in UART mode
 586                                  */
 587         {
 588                 printk(KERN_WARNING "mpu401: commands not possible in the UART mode\n");
 589                 return -EINVAL;
 590         }
 591         /*
 592          * Test for input since pending input seems to block the output.
 593          */
 594         if (input_avail(devc))
 595                 mpu401_input_loop(devc);
 596
 597         /*
 598          * Sometimes it takes about 50000 loops before the output becomes ready
 599          * (After reset). Normally it takes just about 10 loops.
 600          */
 601
 602         timeout = 50000;
 603 retry:
 604         if (timeout-- <= 0)
 605         {
 606                 printk(KERN_WARNING "mpu401: Command (0x%x) timeout\n", (int) cmd->cmd);
 607                 return -EIO;
 608         }
 609         spin_lock_irqsave(&devc->lock,flags);
 610
 611         if (!output_ready(devc))
 612         {
 613                 spin_unlock_irqrestore(&devc->lock,flags);
 614                 goto retry;
 615         }
 616         write_command(devc, cmd->cmd);
 617
 618         ok = 0;
 619         for (timeout = 50000; timeout > 0 && !ok; timeout--)
 620         {
 621                 if (input_avail(devc))
 622                 {
 623                         if (devc->opened && devc->mode == MODE_SYNTH)
 624                         {
 625                                 if (mpu_input_scanner(devc, read_data(devc)) == MPU_ACK)
 626                                         ok = 1;
 627                         }
 628                         else
 629                         {
 630                                 /* Device is not currently open. Use simpler method */
 631                                 if (read_data(devc) == MPU_ACK)
 632                                         ok = 1;
 633                         }
 634                 }
 635         }
 636         if (!ok)
 637         {
 638                 spin_unlock_irqrestore(&devc->lock,flags);
 639                 return -EIO;
 640         }
 641         if (cmd->nr_args)
 642         {
 643                 for (i = 0; i < cmd->nr_args; i++)
 644                 {
 645                         for (timeout = 3000; timeout > 0 && !output_ready(devc); timeout--);
 646
 647                         if (!mpu401_out(dev, cmd->data[i]))
 648                         {
 649                                 spin_unlock_irqrestore(&devc->lock,flags);
 650                                 printk(KERN_WARNING "mpu401: Command (0x%x), parm send failed.\n", (int) cmd->cmd);
 651                                 return -EIO;
 652                         }
 653                 }
 654         }
 655         ret = 0;
 656         cmd->data[0] = 0;
 657
 658         if (cmd->nr_returns)
 659         {
 660                 for (i = 0; i < cmd->nr_returns; i++)
 661                 {
 662                         ok = 0;
 663                         for (timeout = 5000; timeout > 0 && !ok; timeout--)
 664                                 if (input_avail(devc))
 665                                 {
 666                                         cmd->data[i] = read_data(devc);
 667                                         ok = 1;
 668                                 }
 669                         if (!ok)
 670                         {
 671                                 spin_unlock_irqrestore(&devc->lock,flags);
 672                                 return -EIO;
 673                         }
 674                 }
 675         }
 676         spin_unlock_irqrestore(&devc->lock,flags);
 677         return ret;
 678 }
 679
 680 static int mpu_cmd(int dev, int cmd, int data)
 681 {
 682         int ret;
 683
 684         static mpu_command_rec rec;
 685
 686         rec.cmd = cmd & 0xff;
 687         rec.nr_args = ((cmd & 0xf0) == 0xE0);
 688         rec.nr_returns = ((cmd & 0xf0) == 0xA0);
 689         rec.data[0] = data & 0xff;
 690
 691         if ((ret = mpu401_command(dev, &rec)) < 0)
 692                 return ret;
 693         return (unsigned char) rec.data[0];
 694 }
 695
 696 static int mpu401_prefix_cmd(int dev, unsigned char status)
 697 {
 698         struct mpu_config *devc = &dev_conf[dev];
 699
 700         if (devc->uart_mode)
 701                 return 1;
 702
 703         if (status < 0xf0)
 704         {
 705                 if (mpu_cmd(dev, 0xD0, 0) < 0)
 706                         return 0;
 707                 return 1;
 708         }
 709         switch (status)
 710         {
 711                 case 0xF0:
 712                         if (mpu_cmd(dev, 0xDF, 0) < 0)
 713                                 return 0;
 714                         return 1;
 715
 716                 default:
 717                         return 0;
 718         }
 719 }
 720
 721 static int mpu401_start_read(int dev)
 722 {
 723         return 0;
 724 }
 725
 726 static int mpu401_end_read(int dev)
 727 {
 728         return 0;
 729 }
 730
 731 static int mpu401_ioctl(int dev, unsigned cmd, void __user *arg)
 732 {
 733         struct mpu_config *devc;
 734         mpu_command_rec rec;
 735         int val, ret;
 736
 737         devc = &dev_conf[dev];
 738         switch (cmd)
 739         {
 740                 case SNDCTL_MIDI_MPUMODE:
 741                         if (!(devc->capabilities & MPU_CAP_INTLG)) { /* No intelligent mode */
 742                                 printk(KERN_WARNING "mpu401: Intelligent mode not supported by the HW\n");
 743                                 return -EINVAL;
 744                         }
 745                         if (get_user(val, (int __user *)arg))
 746                                 return -EFAULT;
 747                         set_uart_mode(dev, devc, !val);
 748                         return 0;
 749
 750                 case SNDCTL_MIDI_MPUCMD:
 751                         if (copy_from_user(&rec, arg, sizeof(rec)))
 752                                 return -EFAULT;
 753                         if ((ret = mpu401_command(dev, &rec)) < 0)
 754                                 return ret;
 755                         if (copy_to_user(arg, &rec, sizeof(rec)))
 756                                 return -EFAULT;
 757                         return 0;
 758
 759                 default:
 760                         return -EINVAL;
 761         }
 762 }
 763
 764 static void mpu401_kick(int dev)
 765 {
 766 }
 767
 768 static int mpu401_buffer_status(int dev)
 769 {
 770         return 0;               /*
 771                                  * No data in buffers
 772                                  */
 773 }
 774
 775 static int mpu_synth_ioctl(int dev, unsigned int cmd, void __user *arg)
 776 {
 777         int midi_dev;
 778         struct mpu_config *devc;
 779
 780         midi_dev = synth_devs[dev]->midi_dev;
 781
 782         if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev] == NULL)
 783                 return -ENXIO;
 784
 785         devc = &dev_conf[midi_dev];
 786
 787         switch (cmd)
 788         {
 789
 790                 case SNDCTL_SYNTH_INFO:
 791                         if (copy_to_user(arg, &mpu_synth_info[midi_dev],
 792                                         sizeof(struct synth_info)))
 793                                 return -EFAULT;
 794                         return 0;
 795
 796                 case SNDCTL_SYNTH_MEMAVL:
 797                         return 0x7fffffff;
 798
 799                 default:
 800                         return -EINVAL;
 801         }
 802 }
 803
 804 static int mpu_synth_open(int dev, int mode)
 805 {
 806         int midi_dev, err;
 807         struct mpu_config *devc;
 808         struct coproc_operations *coprocessor;
 809
 810         midi_dev = synth_devs[dev]->midi_dev;
 811
 812         if (midi_dev < 0 || midi_dev > num_midis || midi_devs[midi_dev] == NULL)
 813                 return -ENXIO;
 814
 815         devc = &dev_conf[midi_dev];
 816
 817         /*
 818          *  Verify that the device is really running.
 819          *  Some devices (such as Ensoniq SoundScape don't
 820          *  work before the on board processor (OBP) is initialized
 821          *  by downloading its microcode.
 822          */
 823
 824         if (!devc->initialized)
 825         {
 826                 if (mpu401_status(devc) == 0xff)        /* Bus float */
 827                 {
 828                         printk(KERN_ERR "mpu401: Device not initialized properly\n");
 829                         return -EIO;
 830                 }
 831                 reset_mpu401(devc);
 832         }
 833         if (devc->opened)
 834                 return -EBUSY;
 835         devc->mode = MODE_SYNTH;
 836         devc->synthno = dev;
 837
 838         devc->inputintr = NULL;
 839
 840         coprocessor = midi_devs[midi_dev]->coproc;
 841         if (coprocessor) {
 842                 if (!try_module_get(coprocessor->owner))
 843                         return -ENODEV;
 844
 845                 if ((err = coprocessor->open(coprocessor->devc, COPR_MIDI)) < 0)
 846                 {
 847                         printk(KERN_WARNING "mpu401: Can't access coprocessor device\n");
 848                         return err;
 849                 }
 850         }
 851         devc->opened = mode;
 852         reset_mpu401(devc);
 853
 854         if (mode & OPEN_READ)
 855         {
 856                 mpu_cmd(midi_dev, 0x8B, 0);     /* Enable data in stop mode */
 857                 mpu_cmd(midi_dev, 0x34, 0);     /* Return timing bytes in stop mode */
 858                 mpu_cmd(midi_dev, 0x87, 0);     /* Enable pitch & controller */
 859         }
 860         return 0;
 861 }
 862
 863 static void mpu_synth_close(int dev)
 864 {
 865         int midi_dev;
 866         struct mpu_config *devc;
 867         struct coproc_operations *coprocessor;
 868
 869         midi_dev = synth_devs[dev]->midi_dev;
 870
 871         devc = &dev_conf[midi_dev];
 872         mpu_cmd(midi_dev, 0x15, 0);     /* Stop recording, playback and MIDI */
 873         mpu_cmd(midi_dev, 0x8a, 0);     /* Disable data in stopped mode */
 874
 875         devc->inputintr = NULL;
 876
 877         coprocessor = midi_devs[midi_dev]->coproc;
 878         if (coprocessor) {
 879                 coprocessor->close(coprocessor->devc, COPR_MIDI);
 880                 module_put(coprocessor->owner);
 881         }
 882         devc->opened = 0;
 883         devc->mode = 0;
 884 }
 885
 886 #define MIDI_SYNTH_NAME "MPU-401 UART Midi"
 887 #define MIDI_SYNTH_CAPS SYNTH_CAP_INPUT
 888 #include "midi_synth.h"
 889
 890 static struct synth_operations mpu401_synth_proto =
 891 {
 892         .owner          = THIS_MODULE,
 893         .id             = "MPU401",
 894         .info           = NULL,
 895         .midi_dev       = 0,
 896         .synth_type     = SYNTH_TYPE_MIDI,
 897         .synth_subtype  = 0,
 898         .open           = mpu_synth_open,
 899         .close          = mpu_synth_close,
 900         .ioctl          = mpu_synth_ioctl,
 901         .kill_note      = midi_synth_kill_note,
 902         .start_note     = midi_synth_start_note,
 903         .set_instr      = midi_synth_set_instr,
 904         .reset          = midi_synth_reset,
 905         .hw_control     = midi_synth_hw_control,
 906         .load_patch     = midi_synth_load_patch,
 907         .aftertouch     = midi_synth_aftertouch,
 908         .controller     = midi_synth_controller,
 909         .panning        = midi_synth_panning,
 910         .bender         = midi_synth_bender,
 911         .setup_voice    = midi_synth_setup_voice,
 912         .send_sysex     = midi_synth_send_sysex
 913 };
 914
 915 static struct synth_operations *mpu401_synth_operations[MAX_MIDI_DEV];
 916
 917 static struct midi_operations mpu401_midi_proto =
 918 {
 919         .owner          = THIS_MODULE,
 920         .info           = {"MPU-401 Midi", 0, MIDI_CAP_MPU401, SNDCARD_MPU401},
 921         .in_info        = {0},
 922         .open           = mpu401_open,
 923         .close          = mpu401_close,
 924         .ioctl          = mpu401_ioctl,
 925         .outputc        = mpu401_out,
 926         .start_read     = mpu401_start_read,
 927         .end_read       = mpu401_end_read,
 928         .kick           = mpu401_kick,
 929         .buffer_status  = mpu401_buffer_status,
 930         .prefix_cmd     = mpu401_prefix_cmd
 931 };
 932
 933 static struct midi_operations mpu401_midi_operations[MAX_MIDI_DEV];
 934
 935 static void mpu401_chk_version(int n, struct mpu_config *devc)
 936 {
 937         int tmp;
 938         unsigned long flags;
 939
 940         devc->version = devc->revision = 0;
 941
 942         spin_lock_irqsave(&devc->lock,flags);
 943         if ((tmp = mpu_cmd(n, 0xAC, 0)) < 0)
 944         {
 945                 spin_unlock_irqrestore(&devc->lock,flags);
 946                 return;
 947         }
 948         if ((tmp & 0xf0) > 0x20)        /* Why it's larger than 2.x ??? */
 949         {
 950                 spin_unlock_irqrestore(&devc->lock,flags);
 951                 return;
 952         }
 953         devc->version = tmp;
 954
 955         if ((tmp = mpu_cmd(n, 0xAD, 0)) < 0)
 956         {
 957                 devc->version = 0;
 958                 spin_unlock_irqrestore(&devc->lock,flags);
 959                 return;
 960         }
 961         devc->revision = tmp;
 962         spin_unlock_irqrestore(&devc->lock,flags);
 963 }
 964
 965 int attach_mpu401(struct address_info *hw_config, struct module *owner)
 966 {
 967         unsigned long flags;
 968         char revision_char;
 969
 970         int m, ret;
 971         struct mpu_config *devc;
 972
 973         hw_config->slots[1] = -1;
 974         m = sound_alloc_mididev();
 975         if (m == -1)
 976         {
 977                 printk(KERN_WARNING "MPU-401: Too many midi devices detected\n");
 978                 ret = -ENOMEM;
 979                 goto out_err;
 980         }
 981         devc = &dev_conf[m];
 982         devc->base = hw_config->io_base;
 983         devc->osp = hw_config->osp;
 984         devc->irq = hw_config->irq;
 985         devc->opened = 0;
 986         devc->uart_mode = 0;
 987         devc->initialized = 0;
 988         devc->version = 0;
 989         devc->revision = 0;
 990         devc->capabilities = 0;
 991         devc->timer_flag = 0;
 992         devc->m_busy = 0;
 993         devc->m_state = ST_INIT;
 994         devc->shared_irq = hw_config->always_detect;
 995         devc->irq = hw_config->irq;
 996         spin_lock_init(&devc->lock);
 997
 998         if (devc->irq < 0)
 999         {
1000                 devc->irq *= -1;
1001                 devc->shared_irq = 1;
1002         }
1003
1004         if (!hw_config->always_detect)
1005         {
1006                 /* Verify the hardware again */
1007                 if (!reset_mpu401(devc))
1008                 {
1009                         printk(KERN_WARNING "mpu401: Device didn't respond\n");
1010                         ret = -ENODEV;
1011                         goto out_mididev;
1012                 }
1013                 if (!devc->shared_irq)
1014                 {
1015                         if (request_irq(devc->irq, mpuintr, 0, "mpu401", (void *)m) < 0)
1016                         {
1017                                 printk(KERN_WARNING "mpu401: Failed to allocate IRQ%d\n", devc->irq);
1018                                 ret = -ENOMEM;
1019                                 goto out_mididev;
1020                         }
1021                 }
1022                 spin_lock_irqsave(&devc->lock,flags);
1023                 mpu401_chk_version(m, devc);
1024                 if (devc->version == 0)
1025                         mpu401_chk_version(m, devc);
1026                         spin_unlock_irqrestore(&devc->lock,flags);
1027         }
1028
1029         if (devc->version != 0)
1030                 if (mpu_cmd(m, 0xC5, 0) >= 0)   /* Set timebase OK */
1031                         if (mpu_cmd(m, 0xE0, 120) >= 0)         /* Set tempo OK */
1032                                 devc->capabilities |= MPU_CAP_INTLG;    /* Supports intelligent mode */
1033
1034
1035         mpu401_synth_operations[m] = (struct synth_operations *)kmalloc(sizeof(struct synth_operations), GFP_KERNEL);
1036
1037         if (mpu401_synth_operations[m] == NULL)
1038         {
1039                 printk(KERN_ERR "mpu401: Can't allocate memory\n");
1040                 ret = -ENOMEM;
1041                 goto out_irq;
1042         }
1043         if (!(devc->capabilities & MPU_CAP_INTLG))      /* No intelligent mode */
1044         {
1045                 memcpy((char *) mpu401_synth_operations[m],
1046                         (char *) &std_midi_synth,
1047                          sizeof(struct synth_operations));
1048         }
1049         else
1050         {
1051                 memcpy((char *) mpu401_synth_operations[m],
1052                         (char *) &mpu401_synth_proto,
1053                          sizeof(struct synth_operations));
1054         }
1055         if (owner)
1056                 mpu401_synth_operations[m]->owner = owner;
1057
1058         memcpy((char *) &mpu401_midi_operations[m],
1059                (char *) &mpu401_midi_proto,
1060                sizeof(struct midi_operations));
1061
1062         mpu401_midi_operations[m].converter = mpu401_synth_operations[m];
1063
1064         memcpy((char *) &mpu_synth_info[m],
1065                (char *) &mpu_synth_info_proto,
1066                sizeof(struct synth_info));
1067
1068         n_mpu_devs++;
1069
1070         if (devc->version == 0x20 && devc->revision >= 0x07)    /* MusicQuest interface */
1071         {
1072                 int ports = (devc->revision & 0x08) ? 32 : 16;
1073
1074                 devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_SMPTE |
1075                                 MPU_CAP_CLS | MPU_CAP_2PORT;
1076
1077                 revision_char = (devc->revision == 0x7f) ? 'M' : ' ';
1078                 sprintf(mpu_synth_info[m].name, "MQX-%d%c MIDI Interface #%d",
1079                                 ports,
1080                                 revision_char,
1081                                 n_mpu_devs);
1082         }
1083         else
1084         {
1085                 revision_char = devc->revision ? devc->revision + '@' : ' ';
1086                 if ((int) devc->revision > ('Z' - '@'))
1087                         revision_char = '+';
1088
1089                 devc->capabilities |= MPU_CAP_SYNC | MPU_CAP_FSK;
1090
1091                 if (hw_config->name)
1092                         sprintf(mpu_synth_info[m].name, "%s (MPU401)", hw_config->name);
1093                 else
1094                         sprintf(mpu_synth_info[m].name,
1095                                 "MPU-401 %d.%d%c Midi interface #%d",
1096                                 (int) (devc->version & 0xf0) >> 4,
1097                                 devc->version & 0x0f,
1098                                 revision_char,
1099                                 n_mpu_devs);
1100         }
1101
1102         strcpy(mpu401_midi_operations[m].info.name,
1103                mpu_synth_info[m].name);
1104
1105         conf_printf(mpu_synth_info[m].name, hw_config);
1106
1107         mpu401_synth_operations[m]->midi_dev = devc->devno = m;
1108         mpu401_synth_operations[devc->devno]->info = &mpu_synth_info[devc->devno];
1109
1110         if (devc->capabilities & MPU_CAP_INTLG)         /* Intelligent mode */
1111                 hw_config->slots[2] = mpu_timer_init(m);
1112
1113         midi_devs[m] = &mpu401_midi_operations[devc->devno];
1114
1115         if (owner)
1116                 midi_devs[m]->owner = owner;
1117
1118         hw_config->slots[1] = m;
1119         sequencer_init();
1120
1121         return 0;
1122
1123 out_irq:
1124         free_irq(devc->irq, (void *)m);
1125 out_mididev:
1126         sound_unload_mididev(m);
1127 out_err:
1128         release_region(hw_config->io_base, 2);
1129         return ret;
1130 }
1131
1132 static int reset_mpu401(struct mpu_config *devc)
1133 {
1134         unsigned long flags;
1135         int ok, timeout, n;
1136         int timeout_limit;
1137
1138         /*
1139          * Send the RESET command. Try again if no success at the first time.
1140          * (If the device is in the UART mode, it will not ack the reset cmd).
1141          */
1142
1143         ok = 0;
1144
1145         timeout_limit = devc->initialized ? 30000 : 100000;
1146         devc->initialized = 1;
1147
1148         for (n = 0; n < 2 && !ok; n++)
1149         {
1150                 for (timeout = timeout_limit; timeout > 0 && !ok; timeout--)
1151                           ok = output_ready(devc);
1152
1153                 write_command(devc, MPU_RESET); /*
1154                                                            * Send MPU-401 RESET Command
1155                                                          */
1156
1157                 /*
1158                  * Wait at least 25 msec. This method is not accurate so let's make the
1159                  * loop bit longer. Cannot sleep since this is called during boot.
1160                  */
1161
1162                 for (timeout = timeout_limit * 2; timeout > 0 && !ok; timeout--)
1163                 {
1164                         spin_lock_irqsave(&devc->lock,flags);
1165                         if (input_avail(devc))
1166                                 if (read_data(devc) == MPU_ACK)
1167                                         ok = 1;
1168                         spin_unlock_irqrestore(&devc->lock,flags);
1169                 }
1170
1171         }
1172
1173         devc->m_state = ST_INIT;
1174         devc->m_ptr = 0;
1175         devc->m_left = 0;
1176         devc->last_status = 0;
1177         devc->uart_mode = 0;
1178
1179         return ok;
1180 }
1181
1182 static void set_uart_mode(int dev, struct mpu_config *devc, int arg)
1183 {
1184         if (!arg && (devc->capabilities & MPU_CAP_INTLG))
1185                 return;
1186         if ((devc->uart_mode == 0) == (arg == 0))
1187                 return;         /* Already set */
1188         reset_mpu401(devc);     /* This exits the uart mode */
1189
1190         if (arg)
1191         {
1192                 if (mpu_cmd(dev, UART_MODE_ON, 0) < 0)
1193                 {
1194                         printk(KERN_ERR "mpu401: Can't enter UART mode\n");
1195                         devc->uart_mode = 0;
1196                         return;
1197                 }
1198         }
1199         devc->uart_mode = arg;
1200
1201 }
1202
1203 int probe_mpu401(struct address_info *hw_config, struct resource *ports)
1204 {
1205         int ok = 0;
1206         struct mpu_config tmp_devc;
1207
1208         tmp_devc.base = hw_config->io_base;
1209         tmp_devc.irq = hw_config->irq;
1210         tmp_devc.initialized = 0;
1211         tmp_devc.opened = 0;
1212         tmp_devc.osp = hw_config->osp;
1213
1214         if (hw_config->always_detect)
1215                 return 1;
1216
1217         if (inb(hw_config->io_base + 1) == 0xff)
1218         {
1219                 DDB(printk("MPU401: Port %x looks dead.\n", hw_config->io_base));
1220                 return 0;       /* Just bus float? */
1221         }
1222         ok = reset_mpu401(&tmp_devc);
1223
1224         if (!ok)
1225         {
1226                 DDB(printk("MPU401: Reset failed on port %x\n", hw_config->io_base));
1227         }
1228         return ok;
1229 }
1230
1231 void unload_mpu401(struct address_info *hw_config)
1232 {
1233         void *p;
1234         int n=hw_config->slots[1];
1235
1236         if (n != -1) {
1237                 release_region(hw_config->io_base, 2);
1238                 if (hw_config->always_detect == 0 && hw_config->irq > 0)
1239                         free_irq(hw_config->irq, (void *)n);
1240                 p=mpu401_synth_operations[n];
1241                 sound_unload_mididev(n);
1242                 sound_unload_timerdev(hw_config->slots[2]);
1243                 kfree(p);
1244         }
1245 }
1246
1247 /*****************************************************
1248  *      Timer stuff
1249  ****************************************************/
1250
1251 static volatile int timer_initialized = 0, timer_open = 0, tmr_running = 0;
1252 static volatile int curr_tempo, curr_timebase, hw_timebase;
1253 static int      max_timebase = 8;       /* 8*24=192 ppqn */
1254 static volatile unsigned long next_event_time;
1255 static volatile unsigned long curr_ticks, curr_clocks;
1256 static unsigned long prev_event_time;
1257 static int      metronome_mode;
1258
1259 static unsigned long clocks2ticks(unsigned long clocks)
1260 {
1261         /*
1262          * The MPU-401 supports just a limited set of possible timebase values.
1263          * Since the applications require more choices, the driver has to
1264          * program the HW to do its best and to convert between the HW and
1265          * actual timebases.
1266          */
1267         return ((clocks * curr_timebase) + (hw_timebase / 2)) / hw_timebase;
1268 }
1269
1270 static void set_timebase(int midi_dev, int val)
1271 {
1272         int hw_val;
1273
1274         if (val < 48)
1275                 val = 48;
1276         if (val > 1000)
1277                 val = 1000;
1278
1279         hw_val = val;
1280         hw_val = (hw_val + 12) / 24;
1281         if (hw_val > max_timebase)
1282                 hw_val = max_timebase;
1283
1284         if (mpu_cmd(midi_dev, 0xC0 | (hw_val & 0x0f), 0) < 0)
1285         {
1286                 printk(KERN_WARNING "mpu401: Can't set HW timebase to %d\n", hw_val * 24);
1287                 return;
1288         }
1289         hw_timebase = hw_val * 24;
1290         curr_timebase = val;
1291
1292 }
1293
1294 static void tmr_reset(struct mpu_config *devc)
1295 {
1296         unsigned long flags;
1297
1298         spin_lock_irqsave(&devc->lock,flags);
1299         next_event_time = (unsigned long) -1;
1300         prev_event_time = 0;
1301         curr_ticks = curr_clocks = 0;
1302         spin_unlock_irqrestore(&devc->lock,flags);
1303 }
1304
1305 static void set_timer_mode(int midi_dev)
1306 {
1307         if (timer_mode & TMR_MODE_CLS)
1308                 mpu_cmd(midi_dev, 0x3c, 0);     /* Use CLS sync */
1309         else if (timer_mode & TMR_MODE_SMPTE)
1310                 mpu_cmd(midi_dev, 0x3d, 0);     /* Use SMPTE sync */
1311
1312         if (timer_mode & TMR_INTERNAL)
1313         {
1314                   mpu_cmd(midi_dev, 0x80, 0);   /* Use MIDI sync */
1315         }
1316         else
1317         {
1318                 if (timer_mode & (TMR_MODE_MIDI | TMR_MODE_CLS))
1319                 {
1320                         mpu_cmd(midi_dev, 0x82, 0);             /* Use MIDI sync */
1321                         mpu_cmd(midi_dev, 0x91, 0);             /* Enable ext MIDI ctrl */
1322                 }
1323                 else if (timer_mode & TMR_MODE_FSK)
1324                         mpu_cmd(midi_dev, 0x81, 0);     /* Use FSK sync */
1325         }
1326 }
1327
1328 static void stop_metronome(int midi_dev)
1329 {
1330         mpu_cmd(midi_dev, 0x84, 0);     /* Disable metronome */
1331 }
1332
1333 static void setup_metronome(int midi_dev)
1334 {
1335         int numerator, denominator;
1336         int clks_per_click, num_32nds_per_beat;
1337         int beats_per_measure;
1338
1339         numerator = ((unsigned) metronome_mode >> 24) & 0xff;
1340         denominator = ((unsigned) metronome_mode >> 16) & 0xff;
1341         clks_per_click = ((unsigned) metronome_mode >> 8) & 0xff;
1342         num_32nds_per_beat = (unsigned) metronome_mode & 0xff;
1343         beats_per_measure = (numerator * 4) >> denominator;
1344
1345         if (!metronome_mode)
1346                 mpu_cmd(midi_dev, 0x84, 0);     /* Disable metronome */
1347         else
1348         {
1349                 mpu_cmd(midi_dev, 0xE4, clks_per_click);
1350                 mpu_cmd(midi_dev, 0xE6, beats_per_measure);
1351                 mpu_cmd(midi_dev, 0x83, 0);     /* Enable metronome without accents */
1352         }
1353 }
1354
1355 static int mpu_start_timer(int midi_dev)
1356 {
1357         struct mpu_config *devc= &dev_conf[midi_dev];
1358
1359         tmr_reset(devc);
1360         set_timer_mode(midi_dev);
1361
1362         if (tmr_running)
1363                 return TIMER_NOT_ARMED;         /* Already running */
1364
1365         if (timer_mode & TMR_INTERNAL)
1366         {
1367                 mpu_cmd(midi_dev, 0x02, 0);     /* Send MIDI start */
1368                 tmr_running = 1;
1369                 return TIMER_NOT_ARMED;
1370         }
1371         else
1372         {
1373                 mpu_cmd(midi_dev, 0x35, 0);     /* Enable mode messages to PC */
1374                 mpu_cmd(midi_dev, 0x38, 0);     /* Enable sys common messages to PC */
1375                 mpu_cmd(midi_dev, 0x39, 0);     /* Enable real time messages to PC */
1376                 mpu_cmd(midi_dev, 0x97, 0);     /* Enable system exclusive messages to PC */
1377         }
1378         return TIMER_ARMED;
1379 }
1380
1381 static int mpu_timer_open(int dev, int mode)
1382 {
1383         int midi_dev = sound_timer_devs[dev]->devlink;
1384         struct mpu_config *devc= &dev_conf[midi_dev];
1385
1386         if (timer_open)
1387                 return -EBUSY;
1388
1389         tmr_reset(devc);
1390         curr_tempo = 50;
1391         mpu_cmd(midi_dev, 0xE0, 50);
1392         curr_timebase = hw_timebase = 120;
1393         set_timebase(midi_dev, 120);
1394         timer_open = 1;
1395         metronome_mode = 0;
1396         set_timer_mode(midi_dev);
1397
1398         mpu_cmd(midi_dev, 0xe7, 0x04);  /* Send all clocks to host */
1399         mpu_cmd(midi_dev, 0x95, 0);     /* Enable clock to host */
1400
1401         return 0;
1402 }
1403
1404 static void mpu_timer_close(int dev)
1405 {
1406         int midi_dev = sound_timer_devs[dev]->devlink;
1407
1408         timer_open = tmr_running = 0;
1409         mpu_cmd(midi_dev, 0x15, 0);     /* Stop all */
1410         mpu_cmd(midi_dev, 0x94, 0);     /* Disable clock to host */
1411         mpu_cmd(midi_dev, 0x8c, 0);     /* Disable measure end messages to host */
1412         stop_metronome(midi_dev);
1413 }
1414
1415 static int mpu_timer_event(int dev, unsigned char *event)
1416 {
1417         unsigned char command = event[1];
1418         unsigned long parm = *(unsigned int *) &event[4];
1419         int midi_dev = sound_timer_devs[dev]->devlink;
1420
1421         switch (command)
1422         {
1423                 case TMR_WAIT_REL:
1424                         parm += prev_event_time;
1425                 case TMR_WAIT_ABS:
1426                         if (parm > 0)
1427                         {
1428                                 long time;
1429
1430                                 if (parm <= curr_ticks) /* It's the time */
1431                                         return TIMER_NOT_ARMED;
1432                                 time = parm;
1433                                 next_event_time = prev_event_time = time;
1434
1435                                 return TIMER_ARMED;
1436                         }
1437                         break;
1438
1439                 case TMR_START:
1440                         if (tmr_running)
1441                                 break;
1442                         return mpu_start_timer(midi_dev);
1443
1444                 case TMR_STOP:
1445                         mpu_cmd(midi_dev, 0x01, 0);     /* Send MIDI stop */
1446                         stop_metronome(midi_dev);
1447                         tmr_running = 0;
1448                         break;
1449
1450                 case TMR_CONTINUE:
1451                         if (tmr_running)
1452                                 break;
1453                         mpu_cmd(midi_dev, 0x03, 0);     /* Send MIDI continue */
1454                         setup_metronome(midi_dev);
1455                         tmr_running = 1;
1456                         break;
1457
1458                 case TMR_TEMPO:
1459                         if (parm)
1460                         {
1461                                 if (parm < 8)
1462                                         parm = 8;
1463                                 if (parm > 250)
1464                                         parm = 250;
1465                                 if (mpu_cmd(midi_dev, 0xE0, parm) < 0)
1466                                         printk(KERN_WARNING "mpu401: Can't set tempo to %d\n", (int) parm);
1467                                 curr_tempo = parm;
1468                         }
1469                         break;
1470
1471                 case TMR_ECHO:
1472                         seq_copy_to_input(event, 8);
1473                         break;
1474
1475                 case TMR_TIMESIG:
1476                         if (metronome_mode)     /* Metronome enabled */
1477                         {
1478                                 metronome_mode = parm;
1479                                 setup_metronome(midi_dev);
1480                         }
1481                         break;
1482
1483                 default:;
1484         }
1485         return TIMER_NOT_ARMED;
1486 }
1487
1488 static unsigned long mpu_timer_get_time(int dev)
1489 {
1490         if (!timer_open)
1491                 return 0;
1492
1493         return curr_ticks;
1494 }
1495
1496 static int mpu_timer_ioctl(int dev, unsigned int command, void __user *arg)
1497 {
1498         int midi_dev = sound_timer_devs[dev]->devlink;
1499         int __user *p = (int __user *)arg;
1500
1501         switch (command)
1502         {
1503                 case SNDCTL_TMR_SOURCE:
1504                         {
1505                                 int parm;
1506
1507                                 if (get_user(parm, p))
1508                                         return -EFAULT;
1509                                 parm &= timer_caps;
1510
1511                                 if (parm != 0)
1512                                 {
1513                                         timer_mode = parm;
1514
1515                                         if (timer_mode & TMR_MODE_CLS)
1516                                                 mpu_cmd(midi_dev, 0x3c, 0);             /* Use CLS sync */
1517                                         else if (timer_mode & TMR_MODE_SMPTE)
1518                                                 mpu_cmd(midi_dev, 0x3d, 0);             /* Use SMPTE sync */
1519                                 }
1520                                 if (put_user(timer_mode, p))
1521                                         return -EFAULT;
1522                                 return timer_mode;
1523                         }
1524                         break;
1525
1526                 case SNDCTL_TMR_START:
1527                         mpu_start_timer(midi_dev);
1528                         return 0;
1529
1530                 case SNDCTL_TMR_STOP:
1531                         tmr_running = 0;
1532                         mpu_cmd(midi_dev, 0x01, 0);     /* Send MIDI stop */
1533                         stop_metronome(midi_dev);
1534                         return 0;
1535
1536                 case SNDCTL_TMR_CONTINUE:
1537                         if (tmr_running)
1538                                 return 0;
1539                         tmr_running = 1;
1540                         mpu_cmd(midi_dev, 0x03, 0);     /* Send MIDI continue */
1541                         return 0;
1542
1543                 case SNDCTL_TMR_TIMEBASE:
1544                         {
1545                                 int val;
1546                                 if (get_user(val, p))
1547                                         return -EFAULT;
1548                                 if (val)
1549                                         set_timebase(midi_dev, val);
1550                                 if (put_user(curr_timebase, p))
1551                                         return -EFAULT;
1552                                 return curr_timebase;
1553                         }
1554                         break;
1555
1556                 case SNDCTL_TMR_TEMPO:
1557                         {
1558                                 int val;
1559                                 int ret;
1560
1561                                 if (get_user(val, p))
1562                                         return -EFAULT;
1563
1564                                 if (val)
1565                                 {
1566                                         if (val < 8)
1567                                                 val = 8;
1568                                         if (val > 250)
1569                                                 val = 250;
1570                                         if ((ret = mpu_cmd(midi_dev, 0xE0, val)) < 0)
1571                                         {
1572                                                 printk(KERN_WARNING "mpu401: Can't set tempo to %d\n", (int) val);
1573                                                 return ret;
1574                                         }
1575                                         curr_tempo = val;
1576                                 }
1577                                 if (put_user(curr_tempo, p))
1578                                         return -EFAULT;
1579                                 return curr_tempo;
1580                         }
1581                         break;
1582
1583                 case SNDCTL_SEQ_CTRLRATE:
1584                         {
1585                                 int val;
1586                                 if (get_user(val, p))
1587                                         return -EFAULT;
1588
1589                                 if (val != 0)           /* Can't change */
1590                                         return -EINVAL;
1591                                 val = ((curr_tempo * curr_timebase) + 30)/60;
1592                                 if (put_user(val, p))
1593                                         return -EFAULT;
1594                                 return val;
1595                         }
1596                         break;
1597
1598                 case SNDCTL_SEQ_GETTIME:
1599                         if (put_user(curr_ticks, p))
1600                                 return -EFAULT;
1601                         return curr_ticks;
1602
1603                 case SNDCTL_TMR_METRONOME:
1604                         if (get_user(metronome_mode, p))
1605                                 return -EFAULT;
1606                         setup_metronome(midi_dev);
1607                         return 0;
1608
1609                 default:;
1610         }
1611         return -EINVAL;
1612 }
1613
1614 static void mpu_timer_arm(int dev, long time)
1615 {
1616         if (time < 0)
1617                 time = curr_ticks + 1;
1618         else if (time <= curr_ticks)    /* It's the time */
1619                 return;
1620         next_event_time = prev_event_time = time;
1621         return;
1622 }
1623
1624 static struct sound_timer_operations mpu_timer =
1625 {
1626         .owner          = THIS_MODULE,
1627         .info           = {"MPU-401 Timer", 0},
1628         .priority       = 10,   /* Priority */
1629         .devlink        = 0,    /* Local device link */
1630         .open           = mpu_timer_open,
1631         .close          = mpu_timer_close,
1632         .event          = mpu_timer_event,
1633         .get_time       = mpu_timer_get_time,
1634         .ioctl          = mpu_timer_ioctl,
1635         .arm_timer      = mpu_timer_arm
1636 };
1637
1638 static void mpu_timer_interrupt(void)
1639 {
1640         if (!timer_open)
1641                 return;
1642
1643         if (!tmr_running)
1644                 return;
1645
1646         curr_clocks++;
1647         curr_ticks = clocks2ticks(curr_clocks);
1648
1649         if (curr_ticks >= next_event_time)
1650         {
1651                 next_event_time = (unsigned long) -1;
1652                 sequencer_timer(0);
1653         }
1654 }
1655
1656 static void timer_ext_event(struct mpu_config *devc, int event, int parm)
1657 {
1658         int midi_dev = devc->devno;
1659
1660         if (!devc->timer_flag)
1661                 return;
1662
1663         switch (event)
1664         {
1665                 case TMR_CLOCK:
1666                         printk("<MIDI clk>");
1667                         break;
1668
1669                 case TMR_START:
1670                         printk("Ext MIDI start\n");
1671                         if (!tmr_running)
1672                         {
1673                                 if (timer_mode & TMR_EXTERNAL)
1674                                 {
1675                                         tmr_running = 1;
1676                                         setup_metronome(midi_dev);
1677                                         next_event_time = 0;
1678                                         STORE(SEQ_START_TIMER());
1679                                 }
1680                         }
1681                         break;
1682
1683                 case TMR_STOP:
1684                         printk("Ext MIDI stop\n");
1685                         if (timer_mode & TMR_EXTERNAL)
1686                         {
1687                                 tmr_running = 0;
1688                                 stop_metronome(midi_dev);
1689                                 STORE(SEQ_STOP_TIMER());
1690                         }
1691                         break;
1692
1693                 case TMR_CONTINUE:
1694                         printk("Ext MIDI continue\n");
1695                         if (timer_mode & TMR_EXTERNAL)
1696                         {
1697                                 tmr_running = 1;
1698                                 setup_metronome(midi_dev);
1699                                 STORE(SEQ_CONTINUE_TIMER());
1700                         }
1701                         break;
1702
1703                 case TMR_SPP:
1704                         printk("Songpos: %d\n", parm);
1705                         if (timer_mode & TMR_EXTERNAL)
1706                         {
1707                                 STORE(SEQ_SONGPOS(parm));
1708                         }
1709                         break;
1710         }
1711 }
1712
1713 static int mpu_timer_init(int midi_dev)
1714 {
1715         struct mpu_config *devc;
1716         int n;
1717
1718         devc = &dev_conf[midi_dev];
1719
1720         if (timer_initialized)
1721                 return -1;      /* There is already a similar timer */
1722
1723         timer_initialized = 1;
1724
1725         mpu_timer.devlink = midi_dev;
1726         dev_conf[midi_dev].timer_flag = 1;
1727
1728         n = sound_alloc_timerdev();
1729         if (n == -1)
1730                 n = 0;
1731         sound_timer_devs[n] = &mpu_timer;
1732
1733         if (devc->version < 0x20)       /* Original MPU-401 */
1734                 timer_caps = TMR_INTERNAL | TMR_EXTERNAL | TMR_MODE_FSK | TMR_MODE_MIDI;
1735         else
1736         {
1737                 /*
1738                  * The version number 2.0 is used (at least) by the
1739                  * MusicQuest cards and the Roland Super-MPU.
1740                  *
1741                  * MusicQuest has given a special meaning to the bits of the
1742                  * revision number. The Super-MPU returns 0.
1743                  */
1744
1745                 if (devc->revision)
1746                         timer_caps |= TMR_EXTERNAL | TMR_MODE_MIDI;
1747
1748                 if (devc->revision & 0x02)
1749                         timer_caps |= TMR_MODE_CLS;
1750
1751
1752                 if (devc->revision & 0x40)
1753                         max_timebase = 10;      /* Has the 216 and 240 ppqn modes */
1754         }
1755
1756         timer_mode = (TMR_INTERNAL | TMR_MODE_MIDI) & timer_caps;
1757         return n;
1758
1759 }
1760
1761 EXPORT_SYMBOL(probe_mpu401);
1762 EXPORT_SYMBOL(attach_mpu401);
1763 EXPORT_SYMBOL(unload_mpu401);
1764 EXPORT_SYMBOL(intchk_mpu401);
1765 EXPORT_SYMBOL(mpuintr);
1766
1767 static struct address_info cfg;
1768
1769 static int io = -1;
1770 static int irq = -1;
1771
1772 module_param(irq, int, 0);
1773 module_param(io, int, 0);
1774
1775 static int __init init_mpu401(void)
1776 {
1777         int ret;
1778         /* Can be loaded either for module use or to provide functions
1779            to others */
1780         if (io != -1 && irq != -1) {
1781                 struct resource *ports;
1782                 cfg.irq = irq;
1783                 cfg.io_base = io;
1784                 ports = request_region(io, 2, "mpu401");
1785                 if (!ports)
1786                         return -EBUSY;
1787                 if (probe_mpu401(&cfg, ports) == 0) {
1788                         release_region(io, 2);
1789                         return -ENODEV;
1790                 }
1791                 if ((ret = attach_mpu401(&cfg, THIS_MODULE)))
1792                         return ret;
1793         }
1794
1795         return 0;
1796 }
1797
1798 static void __exit cleanup_mpu401(void)
1799 {
1800         if (io != -1 && irq != -1) {
1801                 /* Check for use by, for example, sscape driver */
1802                 unload_mpu401(&cfg);
1803         }
1804 }
1805
1806 module_init(init_mpu401);
1807 module_exit(cleanup_mpu401);
1808
1809 #ifndef MODULE
1810 static int __init setup_mpu401(char *str)
1811 {
1812         /* io, irq */
1813         int ints[3];
1814
1815         str = get_options(str, ARRAY_SIZE(ints), ints);
1816
1817         io = ints[1];
1818         irq = ints[2];
1819
1820         return 1;
1821 }
1822
1823 __setup("mpu401=", setup_mpu401);
1824 #endif
1825 MODULE_LICENSE("GPL");