sound/drivers/mts64.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   ALSA Driver for Ego Systems Inc. (ESI) Miditerminal 4140
   4  *   Copyright (c) 2006 by Matthias König <mk@phasorlab.de>
   5  */
   6
   7 #include <linux/init.h>
   8 #include <linux/platform_device.h>
   9 #include <linux/parport.h>
  10 #include <linux/spinlock.h>
  11 #include <linux/module.h>
  12 #include <linux/delay.h>
  13 #include <linux/slab.h>
  14 #include <sound/core.h>
  15 #include <sound/initval.h>
  16 #include <sound/rawmidi.h>
  17 #include <sound/control.h>
  18
  19 #define CARD_NAME "Miditerminal 4140"
  20 #define DRIVER_NAME "MTS64"
  21 #define PLATFORM_DRIVER "snd_mts64"
  22
  23 static int index[SNDRV_CARDS]  = SNDRV_DEFAULT_IDX;
  24 static char *id[SNDRV_CARDS]   = SNDRV_DEFAULT_STR;
  25 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
  26
  27 static struct platform_device *platform_devices[SNDRV_CARDS];
  28 static int device_count;
  29
  30 module_param_array(index, int, NULL, 0444);
  31 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
  32 module_param_array(id, charp, NULL, 0444);
  33 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
  34 module_param_array(enable, bool, NULL, 0444);
  35 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
  36
  37 MODULE_AUTHOR("Matthias Koenig <mk@phasorlab.de>");
  38 MODULE_DESCRIPTION("ESI Miditerminal 4140");
  39 MODULE_LICENSE("GPL");
  40
  41 /*********************************************************************
  42  * Chip specific
  43  *********************************************************************/
  44 #define MTS64_NUM_INPUT_PORTS 5
  45 #define MTS64_NUM_OUTPUT_PORTS 4
  46 #define MTS64_SMPTE_SUBSTREAM 4
  47
  48 struct mts64 {
  49         spinlock_t lock;
  50         struct snd_card *card;
  51         struct snd_rawmidi *rmidi;
  52         struct pardevice *pardev;
  53         int open_count;
  54         int current_midi_output_port;
  55         int current_midi_input_port;
  56         u8 mode[MTS64_NUM_INPUT_PORTS];
  57         struct snd_rawmidi_substream *midi_input_substream[MTS64_NUM_INPUT_PORTS];
  58         int smpte_switch;
  59         u8 time[4]; /* [0]=hh, [1]=mm, [2]=ss, [3]=ff */
  60         u8 fps;
  61 };
  62
  63 static int snd_mts64_free(struct mts64 *mts)
  64 {
  65         kfree(mts);
  66         return 0;
  67 }
  68
  69 static int snd_mts64_create(struct snd_card *card,
  70                             struct pardevice *pardev,
  71                             struct mts64 **rchip)
  72 {
  73         struct mts64 *mts;
  74
  75         *rchip = NULL;
  76
  77         mts = kzalloc(sizeof(struct mts64), GFP_KERNEL);
  78         if (mts == NULL)
  79                 return -ENOMEM;
  80
  81         /* Init chip specific data */
  82         spin_lock_init(&mts->lock);
  83         mts->card = card;
  84         mts->pardev = pardev;
  85         mts->current_midi_output_port = -1;
  86         mts->current_midi_input_port = -1;
  87
  88         *rchip = mts;
  89
  90         return 0;
  91 }
  92
  93 /*********************************************************************
  94  * HW register related constants
  95  *********************************************************************/
  96
  97 /* Status Bits */
  98 #define MTS64_STAT_BSY             0x80
  99 #define MTS64_STAT_BIT_SET         0x20  /* readout process, bit is set */
 100 #define MTS64_STAT_PORT            0x10  /* read byte is a port number */
 101
 102 /* Control Bits */
 103 #define MTS64_CTL_READOUT          0x08  /* enable readout */
 104 #define MTS64_CTL_WRITE_CMD        0x06
 105 #define MTS64_CTL_WRITE_DATA       0x02
 106 #define MTS64_CTL_STROBE           0x01
 107
 108 /* Command */
 109 #define MTS64_CMD_RESET            0xfe
 110 #define MTS64_CMD_PROBE            0x8f  /* Used in probing procedure */
 111 #define MTS64_CMD_SMPTE_SET_TIME   0xe8
 112 #define MTS64_CMD_SMPTE_SET_FPS    0xee
 113 #define MTS64_CMD_SMPTE_STOP       0xef
 114 #define MTS64_CMD_SMPTE_FPS_24     0xe3
 115 #define MTS64_CMD_SMPTE_FPS_25     0xe2
 116 #define MTS64_CMD_SMPTE_FPS_2997   0xe4
 117 #define MTS64_CMD_SMPTE_FPS_30D    0xe1
 118 #define MTS64_CMD_SMPTE_FPS_30     0xe0
 119 #define MTS64_CMD_COM_OPEN         0xf8  /* setting the communication mode */
 120 #define MTS64_CMD_COM_CLOSE1       0xff  /* clearing communication mode */
 121 #define MTS64_CMD_COM_CLOSE2       0xf5
 122
 123 /*********************************************************************
 124  * Hardware specific functions
 125  *********************************************************************/
 126 static void mts64_enable_readout(struct parport *p);
 127 static void mts64_disable_readout(struct parport *p);
 128 static int mts64_device_ready(struct parport *p);
 129 static int mts64_device_init(struct parport *p);
 130 static int mts64_device_open(struct mts64 *mts);
 131 static int mts64_device_close(struct mts64 *mts);
 132 static u8 mts64_map_midi_input(u8 c);
 133 static int mts64_probe(struct parport *p);
 134 static u16 mts64_read(struct parport *p);
 135 static u8 mts64_read_char(struct parport *p);
 136 static void mts64_smpte_start(struct parport *p,
 137                               u8 hours, u8 minutes,
 138                               u8 seconds, u8 frames,
 139                               u8 idx);
 140 static void mts64_smpte_stop(struct parport *p);
 141 static void mts64_write_command(struct parport *p, u8 c);
 142 static void mts64_write_data(struct parport *p, u8 c);
 143 static void mts64_write_midi(struct mts64 *mts, u8 c, int midiport);
 144
 145
 146 /*  Enables the readout procedure
 147  *
 148  *  Before we can read a midi byte from the device, we have to set
 149  *  bit 3 of control port.
 150  */
 151 static void mts64_enable_readout(struct parport *p)
 152 {
 153         u8 c;
 154
 155         c = parport_read_control(p);
 156         c |= MTS64_CTL_READOUT;
 157         parport_write_control(p, c);
 158 }
 159
 160 /*  Disables readout
 161  *
 162  *  Readout is disabled by clearing bit 3 of control
 163  */
 164 static void mts64_disable_readout(struct parport *p)
 165 {
 166         u8 c;
 167
 168         c = parport_read_control(p);
 169         c &= ~MTS64_CTL_READOUT;
 170         parport_write_control(p, c);
 171 }
 172
 173 /*  waits for device ready
 174  *
 175  *  Checks if BUSY (Bit 7 of status) is clear
 176  *  1 device ready
 177  *  0 failure
 178  */
 179 static int mts64_device_ready(struct parport *p)
 180 {
 181         int i;
 182         u8 c;
 183
 184         for (i = 0; i < 0xffff; ++i) {
 185                 c = parport_read_status(p);
 186                 c &= MTS64_STAT_BSY;
 187                 if (c != 0)
 188                         return 1;
 189         }
 190
 191         return 0;
 192 }
 193
 194 /*  Init device (LED blinking startup magic)
 195  *
 196  *  Returns:
 197  *  0 init ok
 198  *  -EIO failure
 199  */
 200 static int mts64_device_init(struct parport *p)
 201 {
 202         int i;
 203
 204         mts64_write_command(p, MTS64_CMD_RESET);
 205
 206         for (i = 0; i < 64; ++i) {
 207                 msleep(100);
 208
 209                 if (mts64_probe(p) == 0) {
 210                         /* success */
 211                         mts64_disable_readout(p);
 212                         return 0;
 213                 }
 214         }
 215         mts64_disable_readout(p);
 216
 217         return -EIO;
 218 }
 219
 220 /*
 221  *  Opens the device (set communication mode)
 222  */
 223 static int mts64_device_open(struct mts64 *mts)
 224 {
 225         int i;
 226         struct parport *p = mts->pardev->port;
 227
 228         for (i = 0; i < 5; ++i)
 229                 mts64_write_command(p, MTS64_CMD_COM_OPEN);
 230
 231         return 0;
 232 }
 233
 234 /*
 235  *  Close device (clear communication mode)
 236  */
 237 static int mts64_device_close(struct mts64 *mts)
 238 {
 239         int i;
 240         struct parport *p = mts->pardev->port;
 241
 242         for (i = 0; i < 5; ++i) {
 243                 mts64_write_command(p, MTS64_CMD_COM_CLOSE1);
 244                 mts64_write_command(p, MTS64_CMD_COM_CLOSE2);
 245         }
 246
 247         return 0;
 248 }
 249
 250 /*  map hardware port to substream number
 251  *
 252  *  When reading a byte from the device, the device tells us
 253  *  on what port the byte is. This HW port has to be mapped to
 254  *  the midiport (substream number).
 255  *  substream 0-3 are Midiports 1-4
 256  *  substream 4 is SMPTE Timecode
 257  *  The mapping is done by the table:
 258  *  HW | 0 | 1 | 2 | 3 | 4
 259  *  SW | 0 | 1 | 4 | 2 | 3
 260  */
 261 static u8 mts64_map_midi_input(u8 c)
 262 {
 263         static const u8 map[] = { 0, 1, 4, 2, 3 };
 264
 265         return map[c];
 266 }
 267
 268
 269 /*  Probe parport for device
 270  *
 271  *  Do we have a Miditerminal 4140 on parport?
 272  *  Returns:
 273  *  0       device found
 274  *  -ENODEV no device
 275  */
 276 static int mts64_probe(struct parport *p)
 277 {
 278         u8 c;
 279
 280         mts64_smpte_stop(p);
 281         mts64_write_command(p, MTS64_CMD_PROBE);
 282
 283         msleep(50);
 284
 285         c = mts64_read(p);
 286
 287         c &= 0x00ff;
 288         if (c != MTS64_CMD_PROBE)
 289                 return -ENODEV;
 290         else
 291                 return 0;
 292
 293 }
 294
 295 /*  Read byte incl. status from device
 296  *
 297  *  Returns:
 298  *  data in lower 8 bits and status in upper 8 bits
 299  */
 300 static u16 mts64_read(struct parport *p)
 301 {
 302         u8 data, status;
 303
 304         mts64_device_ready(p);
 305         mts64_enable_readout(p);
 306         status = parport_read_status(p);
 307         data = mts64_read_char(p);
 308         mts64_disable_readout(p);
 309
 310         return (status << 8) | data;
 311 }
 312
 313 /*  Read a byte from device
 314  *
 315  *  Note, that readout mode has to be enabled.
 316  *  readout procedure is as follows:
 317  *  - Write number of the Bit to read to DATA
 318  *  - Read STATUS
 319  *  - Bit 5 of STATUS indicates if Bit is set
 320  *
 321  *  Returns:
 322  *  Byte read from device
 323  */
 324 static u8 mts64_read_char(struct parport *p)
 325 {
 326         u8 c = 0;
 327         u8 status;
 328         u8 i;
 329
 330         for (i = 0; i < 8; ++i) {
 331                 parport_write_data(p, i);
 332                 c >>= 1;
 333                 status = parport_read_status(p);
 334                 if (status & MTS64_STAT_BIT_SET)
 335                         c |= 0x80;
 336         }
 337
 338         return c;
 339 }
 340
 341 /*  Starts SMPTE Timecode generation
 342  *
 343  *  The device creates SMPTE Timecode by hardware.
 344  *  0 24 fps
 345  *  1 25 fps
 346  *  2 29.97 fps
 347  *  3 30 fps (Drop-frame)
 348  *  4 30 fps
 349  */
 350 static void mts64_smpte_start(struct parport *p,
 351                               u8 hours, u8 minutes,
 352                               u8 seconds, u8 frames,
 353                               u8 idx)
 354 {
 355         static const u8 fps[5] = { MTS64_CMD_SMPTE_FPS_24,
 356                              MTS64_CMD_SMPTE_FPS_25,
 357                              MTS64_CMD_SMPTE_FPS_2997,
 358                              MTS64_CMD_SMPTE_FPS_30D,
 359                              MTS64_CMD_SMPTE_FPS_30    };
 360
 361         mts64_write_command(p, MTS64_CMD_SMPTE_SET_TIME);
 362         mts64_write_command(p, frames);
 363         mts64_write_command(p, seconds);
 364         mts64_write_command(p, minutes);
 365         mts64_write_command(p, hours);
 366
 367         mts64_write_command(p, MTS64_CMD_SMPTE_SET_FPS);
 368         mts64_write_command(p, fps[idx]);
 369 }
 370
 371 /*  Stops SMPTE Timecode generation
 372  */
 373 static void mts64_smpte_stop(struct parport *p)
 374 {
 375         mts64_write_command(p, MTS64_CMD_SMPTE_STOP);
 376 }
 377
 378 /*  Write a command byte to device
 379  */
 380 static void mts64_write_command(struct parport *p, u8 c)
 381 {
 382         mts64_device_ready(p);
 383
 384         parport_write_data(p, c);
 385
 386         parport_write_control(p, MTS64_CTL_WRITE_CMD);
 387         parport_write_control(p, MTS64_CTL_WRITE_CMD | MTS64_CTL_STROBE);
 388         parport_write_control(p, MTS64_CTL_WRITE_CMD);
 389 }
 390
 391 /*  Write a data byte to device
 392  */
 393 static void mts64_write_data(struct parport *p, u8 c)
 394 {
 395         mts64_device_ready(p);
 396
 397         parport_write_data(p, c);
 398
 399         parport_write_control(p, MTS64_CTL_WRITE_DATA);
 400         parport_write_control(p, MTS64_CTL_WRITE_DATA | MTS64_CTL_STROBE);
 401         parport_write_control(p, MTS64_CTL_WRITE_DATA);
 402 }
 403
 404 /*  Write a MIDI byte to midiport
 405  *
 406  *  midiport ranges from 0-3 and maps to Ports 1-4
 407  *  assumptions: communication mode is on
 408  */
 409 static void mts64_write_midi(struct mts64 *mts, u8 c,
 410                              int midiport)
 411 {
 412         struct parport *p = mts->pardev->port;
 413
 414         /* check current midiport */
 415         if (mts->current_midi_output_port != midiport)
 416                 mts64_write_command(p, midiport);
 417
 418         /* write midi byte */
 419         mts64_write_data(p, c);
 420 }
 421
 422 /*********************************************************************
 423  * Control elements
 424  *********************************************************************/
 425
 426 /* SMPTE Switch */
 427 #define snd_mts64_ctl_smpte_switch_info         snd_ctl_boolean_mono_info
 428
 429 static int snd_mts64_ctl_smpte_switch_get(struct snd_kcontrol* kctl,
 430                                           struct snd_ctl_elem_value *uctl)
 431 {
 432         struct mts64 *mts = snd_kcontrol_chip(kctl);
 433
 434         spin_lock_irq(&mts->lock);
 435         uctl->value.integer.value[0] = mts->smpte_switch;
 436         spin_unlock_irq(&mts->lock);
 437
 438         return 0;
 439 }
 440
 441 /* smpte_switch is not accessed from IRQ handler, so we just need
 442    to protect the HW access */
 443 static int snd_mts64_ctl_smpte_switch_put(struct snd_kcontrol* kctl,
 444                                           struct snd_ctl_elem_value *uctl)
 445 {
 446         struct mts64 *mts = snd_kcontrol_chip(kctl);
 447         int changed = 0;
 448         int val = !!uctl->value.integer.value[0];
 449
 450         spin_lock_irq(&mts->lock);
 451         if (mts->smpte_switch == val)
 452                 goto __out;
 453
 454         changed = 1;
 455         mts->smpte_switch = val;
 456         if (mts->smpte_switch) {
 457                 mts64_smpte_start(mts->pardev->port,
 458                                   mts->time[0], mts->time[1],
 459                                   mts->time[2], mts->time[3],
 460                                   mts->fps);
 461         } else {
 462                 mts64_smpte_stop(mts->pardev->port);
 463         }
 464 __out:
 465         spin_unlock_irq(&mts->lock);
 466         return changed;
 467 }
 468
 469 static const struct snd_kcontrol_new mts64_ctl_smpte_switch = {
 470         .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
 471         .name  = "SMPTE Playback Switch",
 472         .index = 0,
 473         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 474         .private_value = 0,
 475         .info = snd_mts64_ctl_smpte_switch_info,
 476         .get  = snd_mts64_ctl_smpte_switch_get,
 477         .put  = snd_mts64_ctl_smpte_switch_put
 478 };
 479
 480 /* Time */
 481 static int snd_mts64_ctl_smpte_time_h_info(struct snd_kcontrol *kctl,
 482                                            struct snd_ctl_elem_info *uinfo)
 483 {
 484         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 485         uinfo->count = 1;
 486         uinfo->value.integer.min = 0;
 487         uinfo->value.integer.max = 23;
 488         return 0;
 489 }
 490
 491 static int snd_mts64_ctl_smpte_time_f_info(struct snd_kcontrol *kctl,
 492                                            struct snd_ctl_elem_info *uinfo)
 493 {
 494         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 495         uinfo->count = 1;
 496         uinfo->value.integer.min = 0;
 497         uinfo->value.integer.max = 99;
 498         return 0;
 499 }
 500
 501 static int snd_mts64_ctl_smpte_time_info(struct snd_kcontrol *kctl,
 502                                          struct snd_ctl_elem_info *uinfo)
 503 {
 504         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 505         uinfo->count = 1;
 506         uinfo->value.integer.min = 0;
 507         uinfo->value.integer.max = 59;
 508         return 0;
 509 }
 510
 511 static int snd_mts64_ctl_smpte_time_get(struct snd_kcontrol *kctl,
 512                                         struct snd_ctl_elem_value *uctl)
 513 {
 514         struct mts64 *mts = snd_kcontrol_chip(kctl);
 515         int idx = kctl->private_value;
 516
 517         spin_lock_irq(&mts->lock);
 518         uctl->value.integer.value[0] = mts->time[idx];
 519         spin_unlock_irq(&mts->lock);
 520
 521         return 0;
 522 }
 523
 524 static int snd_mts64_ctl_smpte_time_put(struct snd_kcontrol *kctl,
 525                                         struct snd_ctl_elem_value *uctl)
 526 {
 527         struct mts64 *mts = snd_kcontrol_chip(kctl);
 528         int idx = kctl->private_value;
 529         unsigned int time = uctl->value.integer.value[0] % 60;
 530         int changed = 0;
 531
 532         spin_lock_irq(&mts->lock);
 533         if (mts->time[idx] != time) {
 534                 changed = 1;
 535                 mts->time[idx] = time;
 536         }
 537         spin_unlock_irq(&mts->lock);
 538
 539         return changed;
 540 }
 541
 542 static const struct snd_kcontrol_new mts64_ctl_smpte_time_hours = {
 543         .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
 544         .name  = "SMPTE Time Hours",
 545         .index = 0,
 546         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 547         .private_value = 0,
 548         .info = snd_mts64_ctl_smpte_time_h_info,
 549         .get  = snd_mts64_ctl_smpte_time_get,
 550         .put  = snd_mts64_ctl_smpte_time_put
 551 };
 552
 553 static const struct snd_kcontrol_new mts64_ctl_smpte_time_minutes = {
 554         .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
 555         .name  = "SMPTE Time Minutes",
 556         .index = 0,
 557         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 558         .private_value = 1,
 559         .info = snd_mts64_ctl_smpte_time_info,
 560         .get  = snd_mts64_ctl_smpte_time_get,
 561         .put  = snd_mts64_ctl_smpte_time_put
 562 };
 563
 564 static const struct snd_kcontrol_new mts64_ctl_smpte_time_seconds = {
 565         .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
 566         .name  = "SMPTE Time Seconds",
 567         .index = 0,
 568         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 569         .private_value = 2,
 570         .info = snd_mts64_ctl_smpte_time_info,
 571         .get  = snd_mts64_ctl_smpte_time_get,
 572         .put  = snd_mts64_ctl_smpte_time_put
 573 };
 574
 575 static const struct snd_kcontrol_new mts64_ctl_smpte_time_frames = {
 576         .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
 577         .name  = "SMPTE Time Frames",
 578         .index = 0,
 579         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 580         .private_value = 3,
 581         .info = snd_mts64_ctl_smpte_time_f_info,
 582         .get  = snd_mts64_ctl_smpte_time_get,
 583         .put  = snd_mts64_ctl_smpte_time_put
 584 };
 585
 586 /* FPS */
 587 static int snd_mts64_ctl_smpte_fps_info(struct snd_kcontrol *kctl,
 588                                         struct snd_ctl_elem_info *uinfo)
 589 {
 590         static const char * const texts[5] = {
 591                 "24", "25", "29.97", "30D", "30"
 592         };
 593
 594         return snd_ctl_enum_info(uinfo, 1, 5, texts);
 595 }
 596
 597 static int snd_mts64_ctl_smpte_fps_get(struct snd_kcontrol *kctl,
 598                                        struct snd_ctl_elem_value *uctl)
 599 {
 600         struct mts64 *mts = snd_kcontrol_chip(kctl);
 601
 602         spin_lock_irq(&mts->lock);
 603         uctl->value.enumerated.item[0] = mts->fps;
 604         spin_unlock_irq(&mts->lock);
 605
 606         return 0;
 607 }
 608
 609 static int snd_mts64_ctl_smpte_fps_put(struct snd_kcontrol *kctl,
 610                                        struct snd_ctl_elem_value *uctl)
 611 {
 612         struct mts64 *mts = snd_kcontrol_chip(kctl);
 613         int changed = 0;
 614
 615         if (uctl->value.enumerated.item[0] >= 5)
 616                 return -EINVAL;
 617         spin_lock_irq(&mts->lock);
 618         if (mts->fps != uctl->value.enumerated.item[0]) {
 619                 changed = 1;
 620                 mts->fps = uctl->value.enumerated.item[0];
 621         }
 622         spin_unlock_irq(&mts->lock);
 623
 624         return changed;
 625 }
 626
 627 static const struct snd_kcontrol_new mts64_ctl_smpte_fps = {
 628         .iface = SNDRV_CTL_ELEM_IFACE_RAWMIDI,
 629         .name  = "SMPTE Fps",
 630         .index = 0,
 631         .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
 632         .private_value = 0,
 633         .info  = snd_mts64_ctl_smpte_fps_info,
 634         .get   = snd_mts64_ctl_smpte_fps_get,
 635         .put   = snd_mts64_ctl_smpte_fps_put
 636 };
 637
 638
 639 static int snd_mts64_ctl_create(struct snd_card *card,
 640                                 struct mts64 *mts)
 641 {
 642         int err, i;
 643         static const struct snd_kcontrol_new *control[] = {
 644                 &mts64_ctl_smpte_switch,
 645                 &mts64_ctl_smpte_time_hours,
 646                 &mts64_ctl_smpte_time_minutes,
 647                 &mts64_ctl_smpte_time_seconds,
 648                 &mts64_ctl_smpte_time_frames,
 649                 &mts64_ctl_smpte_fps,
 650                 NULL  };
 651
 652         for (i = 0; control[i]; ++i) {
 653                 err = snd_ctl_add(card, snd_ctl_new1(control[i], mts));
 654                 if (err < 0) {
 655                         snd_printd("Cannot create control: %s\n",
 656                                    control[i]->name);
 657                         return err;
 658                 }
 659         }
 660
 661         return 0;
 662 }
 663
 664 /*********************************************************************
 665  * Rawmidi
 666  *********************************************************************/
 667 #define MTS64_MODE_INPUT_TRIGGERED 0x01
 668
 669 static int snd_mts64_rawmidi_open(struct snd_rawmidi_substream *substream)
 670 {
 671         struct mts64 *mts = substream->rmidi->private_data;
 672
 673         if (mts->open_count == 0) {
 674                 /* We don't need a spinlock here, because this is just called
 675                    if the device has not been opened before.
 676                    So there aren't any IRQs from the device */
 677                 mts64_device_open(mts);
 678
 679                 msleep(50);
 680         }
 681         ++(mts->open_count);
 682
 683         return 0;
 684 }
 685
 686 static int snd_mts64_rawmidi_close(struct snd_rawmidi_substream *substream)
 687 {
 688         struct mts64 *mts = substream->rmidi->private_data;
 689         unsigned long flags;
 690
 691         --(mts->open_count);
 692         if (mts->open_count == 0) {
 693                 /* We need the spinlock_irqsave here because we can still
 694                    have IRQs at this point */
 695                 spin_lock_irqsave(&mts->lock, flags);
 696                 mts64_device_close(mts);
 697                 spin_unlock_irqrestore(&mts->lock, flags);
 698
 699                 msleep(500);
 700
 701         } else if (mts->open_count < 0)
 702                 mts->open_count = 0;
 703
 704         return 0;
 705 }
 706
 707 static void snd_mts64_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,
 708                                              int up)
 709 {
 710         struct mts64 *mts = substream->rmidi->private_data;
 711         u8 data;
 712         unsigned long flags;
 713
 714         spin_lock_irqsave(&mts->lock, flags);
 715         while (snd_rawmidi_transmit_peek(substream, &data, 1) == 1) {
 716                 mts64_write_midi(mts, data, substream->number+1);
 717                 snd_rawmidi_transmit_ack(substream, 1);
 718         }
 719         spin_unlock_irqrestore(&mts->lock, flags);
 720 }
 721
 722 static void snd_mts64_rawmidi_input_trigger(struct snd_rawmidi_substream *substream,
 723                                             int up)
 724 {
 725         struct mts64 *mts = substream->rmidi->private_data;
 726         unsigned long flags;
 727
 728         spin_lock_irqsave(&mts->lock, flags);
 729         if (up)
 730                 mts->mode[substream->number] |= MTS64_MODE_INPUT_TRIGGERED;
 731         else
 732                 mts->mode[substream->number] &= ~MTS64_MODE_INPUT_TRIGGERED;
 733
 734         spin_unlock_irqrestore(&mts->lock, flags);
 735 }
 736
 737 static const struct snd_rawmidi_ops snd_mts64_rawmidi_output_ops = {
 738         .open    = snd_mts64_rawmidi_open,
 739         .close   = snd_mts64_rawmidi_close,
 740         .trigger = snd_mts64_rawmidi_output_trigger
 741 };
 742
 743 static const struct snd_rawmidi_ops snd_mts64_rawmidi_input_ops = {
 744         .open    = snd_mts64_rawmidi_open,
 745         .close   = snd_mts64_rawmidi_close,
 746         .trigger = snd_mts64_rawmidi_input_trigger
 747 };
 748
 749 /* Create and initialize the rawmidi component */
 750 static int snd_mts64_rawmidi_create(struct snd_card *card)
 751 {
 752         struct mts64 *mts = card->private_data;
 753         struct snd_rawmidi *rmidi;
 754         struct snd_rawmidi_substream *substream;
 755         struct list_head *list;
 756         int err;
 757
 758         err = snd_rawmidi_new(card, CARD_NAME, 0,
 759                               MTS64_NUM_OUTPUT_PORTS,
 760                               MTS64_NUM_INPUT_PORTS,
 761                               &rmidi);
 762         if (err < 0)
 763                 return err;
 764
 765         rmidi->private_data = mts;
 766         strcpy(rmidi->name, CARD_NAME);
 767         rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
 768                             SNDRV_RAWMIDI_INFO_INPUT |
 769                             SNDRV_RAWMIDI_INFO_DUPLEX;
 770
 771         mts->rmidi = rmidi;
 772
 773         /* register rawmidi ops */
 774         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
 775                             &snd_mts64_rawmidi_output_ops);
 776         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
 777                             &snd_mts64_rawmidi_input_ops);
 778
 779         /* name substreams */
 780         /* output */
 781         list_for_each(list,
 782                       &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
 783                 substream = list_entry(list, struct snd_rawmidi_substream, list);
 784                 sprintf(substream->name,
 785                         "Miditerminal %d", substream->number+1);
 786         }
 787         /* input */
 788         list_for_each(list,
 789                       &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
 790                 substream = list_entry(list, struct snd_rawmidi_substream, list);
 791                 mts->midi_input_substream[substream->number] = substream;
 792                 switch(substream->number) {
 793                 case MTS64_SMPTE_SUBSTREAM:
 794                         strcpy(substream->name, "Miditerminal SMPTE");
 795                         break;
 796                 default:
 797                         sprintf(substream->name,
 798                                 "Miditerminal %d", substream->number+1);
 799                 }
 800         }
 801
 802         /* controls */
 803         err = snd_mts64_ctl_create(card, mts);
 804
 805         return err;
 806 }
 807
 808 /*********************************************************************
 809  * parport stuff
 810  *********************************************************************/
 811 static void snd_mts64_interrupt(void *private)
 812 {
 813         struct mts64 *mts = ((struct snd_card*)private)->private_data;
 814         u16 ret;
 815         u8 status, data;
 816         struct snd_rawmidi_substream *substream;
 817
 818         spin_lock(&mts->lock);
 819         ret = mts64_read(mts->pardev->port);
 820         data = ret & 0x00ff;
 821         status = ret >> 8;
 822
 823         if (status & MTS64_STAT_PORT) {
 824                 mts->current_midi_input_port = mts64_map_midi_input(data);
 825         } else {
 826                 if (mts->current_midi_input_port == -1)
 827                         goto __out;
 828                 substream = mts->midi_input_substream[mts->current_midi_input_port];
 829                 if (mts->mode[substream->number] & MTS64_MODE_INPUT_TRIGGERED)
 830                         snd_rawmidi_receive(substream, &data, 1);
 831         }
 832 __out:
 833         spin_unlock(&mts->lock);
 834 }
 835
 836 static void snd_mts64_attach(struct parport *p)
 837 {
 838         struct platform_device *device;
 839
 840         device = platform_device_alloc(PLATFORM_DRIVER, device_count);
 841         if (!device)
 842                 return;
 843
 844         /* Temporary assignment to forward the parport */
 845         platform_set_drvdata(device, p);
 846
 847         if (platform_device_add(device) < 0) {
 848                 platform_device_put(device);
 849                 return;
 850         }
 851
 852         /* Since we dont get the return value of probe
 853          * We need to check if device probing succeeded or not */
 854         if (!platform_get_drvdata(device)) {
 855                 platform_device_unregister(device);
 856                 return;
 857         }
 858
 859         /* register device in global table */
 860         platform_devices[device_count] = device;
 861         device_count++;
 862 }
 863
 864 static void snd_mts64_detach(struct parport *p)
 865 {
 866         /* nothing to do here */
 867 }
 868
 869 static int snd_mts64_dev_probe(struct pardevice *pardev)
 870 {
 871         if (strcmp(pardev->name, DRIVER_NAME))
 872                 return -ENODEV;
 873
 874         return 0;
 875 }
 876
 877 static struct parport_driver mts64_parport_driver = {
 878         .name           = "mts64",
 879         .probe          = snd_mts64_dev_probe,
 880         .match_port     = snd_mts64_attach,
 881         .detach         = snd_mts64_detach,
 882         .devmodel       = true,
 883 };
 884
 885 /*********************************************************************
 886  * platform stuff
 887  *********************************************************************/
 888 static void snd_mts64_card_private_free(struct snd_card *card)
 889 {
 890         struct mts64 *mts = card->private_data;
 891         struct pardevice *pardev = mts->pardev;
 892
 893         if (pardev) {
 894                 parport_release(pardev);
 895                 parport_unregister_device(pardev);
 896         }
 897
 898         snd_mts64_free(mts);
 899 }
 900
 901 static int snd_mts64_probe(struct platform_device *pdev)
 902 {
 903         struct pardevice *pardev;
 904         struct parport *p;
 905         int dev = pdev->id;
 906         struct snd_card *card = NULL;
 907         struct mts64 *mts = NULL;
 908         int err;
 909         struct pardev_cb mts64_cb = {
 910                 .preempt = NULL,
 911                 .wakeup = NULL,
 912                 .irq_func = snd_mts64_interrupt,        /* ISR */
 913                 .flags = PARPORT_DEV_EXCL,              /* flags */
 914         };
 915
 916         p = platform_get_drvdata(pdev);
 917         platform_set_drvdata(pdev, NULL);
 918
 919         if (dev >= SNDRV_CARDS)
 920                 return -ENODEV;
 921         if (!enable[dev])
 922                 return -ENOENT;
 923
 924         err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,
 925                            0, &card);
 926         if (err < 0) {
 927                 snd_printd("Cannot create card\n");
 928                 return err;
 929         }
 930         strcpy(card->driver, DRIVER_NAME);
 931         strcpy(card->shortname, "ESI " CARD_NAME);
 932         sprintf(card->longname,  "%s at 0x%lx, irq %i",
 933                 card->shortname, p->base, p->irq);
 934
 935         mts64_cb.private = card;                         /* private */
 936         pardev = parport_register_dev_model(p,           /* port */
 937                                             DRIVER_NAME, /* name */
 938                                             &mts64_cb,   /* callbacks */
 939                                             pdev->id);   /* device number */
 940         if (!pardev) {
 941                 snd_printd("Cannot register pardevice\n");
 942                 err = -EIO;
 943                 goto __err;
 944         }
 945
 946         /* claim parport */
 947         if (parport_claim(pardev)) {
 948                 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
 949                 err = -EIO;
 950                 goto free_pardev;
 951         }
 952
 953         err = snd_mts64_create(card, pardev, &mts);
 954         if (err < 0) {
 955                 snd_printd("Cannot create main component\n");
 956                 goto release_pardev;
 957         }
 958         card->private_data = mts;
 959         card->private_free = snd_mts64_card_private_free;
 960
 961         err = mts64_probe(p);
 962         if (err) {
 963                 err = -EIO;
 964                 goto __err;
 965         }
 966
 967         err = snd_mts64_rawmidi_create(card);
 968         if (err < 0) {
 969                 snd_printd("Creating Rawmidi component failed\n");
 970                 goto __err;
 971         }
 972
 973         /* init device */
 974         err = mts64_device_init(p);
 975         if (err < 0)
 976                 goto __err;
 977
 978         platform_set_drvdata(pdev, card);
 979
 980         /* At this point card will be usable */
 981         err = snd_card_register(card);
 982         if (err < 0) {
 983                 snd_printd("Cannot register card\n");
 984                 goto __err;
 985         }
 986
 987         snd_printk(KERN_INFO "ESI Miditerminal 4140 on 0x%lx\n", p->base);
 988         return 0;
 989
 990 release_pardev:
 991         parport_release(pardev);
 992 free_pardev:
 993         parport_unregister_device(pardev);
 994 __err:
 995         snd_card_free(card);
 996         return err;
 997 }
 998
 999 static int snd_mts64_remove(struct platform_device *pdev)
1000 {
1001         struct snd_card *card = platform_get_drvdata(pdev);
1002
1003         if (card)
1004                 snd_card_free(card);
1005
1006         return 0;
1007 }
1008
1009 static struct platform_driver snd_mts64_driver = {
1010         .probe  = snd_mts64_probe,
1011         .remove = snd_mts64_remove,
1012         .driver = {
1013                 .name = PLATFORM_DRIVER,
1014         }
1015 };
1016
1017 /*********************************************************************
1018  * module init stuff
1019  *********************************************************************/
1020 static void snd_mts64_unregister_all(void)
1021 {
1022         int i;
1023
1024         for (i = 0; i < SNDRV_CARDS; ++i) {
1025                 if (platform_devices[i]) {
1026                         platform_device_unregister(platform_devices[i]);
1027                         platform_devices[i] = NULL;
1028                 }
1029         }
1030         platform_driver_unregister(&snd_mts64_driver);
1031         parport_unregister_driver(&mts64_parport_driver);
1032 }
1033
1034 static int __init snd_mts64_module_init(void)
1035 {
1036         int err;
1037
1038         err = platform_driver_register(&snd_mts64_driver);
1039         if (err < 0)
1040                 return err;
1041
1042         if (parport_register_driver(&mts64_parport_driver) != 0) {
1043                 platform_driver_unregister(&snd_mts64_driver);
1044                 return -EIO;
1045         }
1046
1047         if (device_count == 0) {
1048                 snd_mts64_unregister_all();
1049                 return -ENODEV;
1050         }
1051
1052         return 0;
1053 }
1054
1055 static void __exit snd_mts64_module_exit(void)
1056 {
1057         snd_mts64_unregister_all();
1058 }
1059
1060 module_init(snd_mts64_module_init);
1061 module_exit(snd_mts64_module_exit);