1/* 2 * Driver for Midiman Portman2x4 parallel port midi interface 3 * 4 * Copyright (c) by Levent Guendogdu <levon@feature-it.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 * 20 * ChangeLog 21 * Jan 24 2007 Matthias Koenig <mkoenig@suse.de> 22 * - cleanup and rewrite 23 * Sep 30 2004 Tobias Gehrig <tobias@gehrig.tk> 24 * - source code cleanup 25 * Sep 03 2004 Tobias Gehrig <tobias@gehrig.tk> 26 * - fixed compilation problem with alsa 1.0.6a (removed MODULE_CLASSES, 27 * MODULE_PARM_SYNTAX and changed MODULE_DEVICES to 28 * MODULE_SUPPORTED_DEVICE) 29 * Mar 24 2004 Tobias Gehrig <tobias@gehrig.tk> 30 * - added 2.6 kernel support 31 * Mar 18 2004 Tobias Gehrig <tobias@gehrig.tk> 32 * - added parport_unregister_driver to the startup routine if the driver fails to detect a portman 33 * - added support for all 4 output ports in portman_putmidi 34 * Mar 17 2004 Tobias Gehrig <tobias@gehrig.tk> 35 * - added checks for opened input device in interrupt handler 36 * Feb 20 2004 Tobias Gehrig <tobias@gehrig.tk> 37 * - ported from alsa 0.5 to 1.0 38 */ 39 40#include <sound/driver.h> 41#include <linux/init.h> 42#include <linux/platform_device.h> 43#include <linux/parport.h> 44#include <linux/spinlock.h> 45#include <linux/delay.h> 46#include <sound/core.h> 47#include <sound/initval.h> 48#include <sound/rawmidi.h> 49#include <sound/control.h> 50 51#define CARD_NAME "Portman 2x4" 52#define DRIVER_NAME "portman" 53#define PLATFORM_DRIVER "snd_portman2x4" 54 55static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 56static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 57static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 58 59static struct platform_device *platform_devices[SNDRV_CARDS]; 60static int device_count; 61 62module_param_array(index, int, NULL, S_IRUGO); 63MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard."); 64module_param_array(id, charp, NULL, S_IRUGO); 65MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard."); 66module_param_array(enable, bool, NULL, S_IRUGO); 67MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard."); 68 69MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig"); 70MODULE_DESCRIPTION("Midiman Portman2x4"); 71MODULE_LICENSE("GPL"); 72MODULE_SUPPORTED_DEVICE("{{Midiman,Portman2x4}}"); 73 74/********************************************************************* 75 * Chip specific 76 *********************************************************************/ 77#define PORTMAN_NUM_INPUT_PORTS 2 78#define PORTMAN_NUM_OUTPUT_PORTS 4 79 80struct portman { 81 spinlock_t reg_lock; 82 struct snd_card *card; 83 struct snd_rawmidi *rmidi; 84 struct pardevice *pardev; 85 int pardev_claimed; 86 87 int open_count; 88 int mode[PORTMAN_NUM_INPUT_PORTS]; 89 struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS]; 90}; 91 92static int portman_free(struct portman *pm) 93{ 94 kfree(pm); 95 return 0; 96} 97 98static int __devinit portman_create(struct snd_card *card, 99 struct pardevice *pardev, 100 struct portman **rchip) 101{ 102 struct portman *pm; 103 104 *rchip = NULL; 105 106 pm = kzalloc(sizeof(struct portman), GFP_KERNEL); 107 if (pm == NULL) 108 return -ENOMEM; 109 110 /* Init chip specific data */ 111 spin_lock_init(&pm->reg_lock); 112 pm->card = card; 113 pm->pardev = pardev; 114 115 *rchip = pm; 116 117 return 0; 118} 119 120/********************************************************************* 121 * HW related constants 122 *********************************************************************/ 123 124/* Standard PC parallel port status register equates. */ 125#define PP_STAT_BSY 0x80 /* Busy status. Inverted. */ 126#define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */ 127#define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */ 128#define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */ 129#define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */ 130 131/* Standard PC parallel port command register equates. */ 132#define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */ 133#define PP_CMD_SELI 0x08 /* Select Input. Inverted. */ 134#define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */ 135#define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */ 136#define PP_CMD_STB 0x01 /* Strobe. Inverted. */ 137 138/* Parallel Port Command Register as implemented by PCP2x4. */ 139#define INT_EN PP_CMD_IEN /* Interrupt enable. */ 140#define STROBE PP_CMD_STB /* Command strobe. */ 141 142/* The parallel port command register field (b1..b3) selects the 143 * various "registers" within the PC/P 2x4. These are the internal 144 * address of these "registers" that must be written to the parallel 145 * port command register. 146 */ 147#define RXDATA0 (0 << 1) /* PCP RxData channel 0. */ 148#define RXDATA1 (1 << 1) /* PCP RxData channel 1. */ 149#define GEN_CTL (2 << 1) /* PCP General Control Register. */ 150#define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */ 151#define TXDATA0 (4 << 1) /* PCP TxData channel 0. */ 152#define TXDATA1 (5 << 1) /* PCP TxData channel 1. */ 153#define TXDATA2 (6 << 1) /* PCP TxData channel 2. */ 154#define TXDATA3 (7 << 1) /* PCP TxData channel 3. */ 155 156/* Parallel Port Status Register as implemented by PCP2x4. */ 157#define ESTB PP_STAT_POUT /* Echoed strobe. */ 158#define INT_REQ PP_STAT_ACK /* Input data int request. */ 159#define BUSY PP_STAT_ERR /* Interface Busy. */ 160 161/* Parallel Port Status Register BUSY and SELECT lines are multiplexed 162 * between several functions. Depending on which 2x4 "register" is 163 * currently selected (b1..b3), the BUSY and SELECT lines are 164 * assigned as follows: 165 * 166 * SELECT LINE: A3 A2 A1 167 * -------- 168 */ 169#define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */ 170// RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */ 171#define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */ 172// /* Reserved. 0 1 1 */ 173#define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */ 174// TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */ 175// TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */ 176// TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */ 177 178/* BUSY LINE: A3 A2 A1 179 * -------- 180 */ 181#define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */ 182// RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */ 183#define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */ 184 /* Reserved. 0 1 1 */ 185#define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */ 186#define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */ 187#define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */ 188#define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */ 189 190#define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01 191 192/********************************************************************* 193 * Hardware specific functions 194 *********************************************************************/ 195static inline void portman_write_command(struct portman *pm, u8 value) 196{ 197 parport_write_control(pm->pardev->port, value); 198} 199 200static inline u8 portman_read_command(struct portman *pm) 201{ 202 return parport_read_control(pm->pardev->port); 203} 204 205static inline u8 portman_read_status(struct portman *pm) 206{ 207 return parport_read_status(pm->pardev->port); 208} 209 210static inline u8 portman_read_data(struct portman *pm) 211{ 212 return parport_read_data(pm->pardev->port); 213} 214 215static inline void portman_write_data(struct portman *pm, u8 value) 216{ 217 parport_write_data(pm->pardev->port, value); 218} 219 220static void portman_write_midi(struct portman *pm, 221 int port, u8 mididata) 222{ 223 int command = ((port + 4) << 1); 224 225 /* Get entering data byte and port number in BL and BH respectively. 226 * Set up Tx Channel address field for use with PP Cmd Register. 227 * Store address field in BH register. 228 * Inputs: AH = Output port number (0..3). 229 * AL = Data byte. 230 * command = TXDATA0 | INT_EN; 231 * Align port num with address field (b1...b3), 232 * set address for TXDatax, Strobe=0 233 */ 234 command |= INT_EN; 235 236 /* Disable interrupts so that the process is not interrupted, then 237 * write the address associated with the current Tx channel to the 238 * PP Command Reg. Do not set the Strobe signal yet. 239 */ 240 241 do { 242 portman_write_command(pm, command); 243 244 /* While the address lines settle, write parallel output data to 245 * PP Data Reg. This has no effect until Strobe signal is asserted. 246 */ 247 248 portman_write_data(pm, mididata); 249 250 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 251 * Status Register), then go write data. Else go back and wait. 252 */ 253 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY); 254 255 /* TxEmpty is set. Maintain PC/P destination address and assert 256 * Strobe through the PP Command Reg. This will Strobe data into 257 * the PC/P transmitter and set the PC/P BUSY signal. 258 */ 259 260 portman_write_command(pm, command | STROBE); 261 262 /* Wait for strobe line to settle and echo back through hardware. 263 * Once it has echoed back, assume that the address and data lines 264 * have settled! 265 */ 266 267 while ((portman_read_status(pm) & ESTB) == 0) 268 cpu_relax(); 269 270 /* Release strobe and immediately re-allow interrupts. */ 271 portman_write_command(pm, command); 272 273 while ((portman_read_status(pm) & ESTB) == ESTB) 274 cpu_relax(); 275 276 /* PC/P BUSY is now set. We must wait until BUSY resets itself. 277 * We'll reenable ints while we're waiting. 278 */ 279 280 while ((portman_read_status(pm) & BUSY) == BUSY) 281 cpu_relax(); 282 283 /* Data sent. */ 284} 285 286 287/* 288 * Read MIDI byte from port 289 * Attempt to read input byte from specified hardware input port (0..). 290 * Return -1 if no data 291 */ 292static int portman_read_midi(struct portman *pm, int port) 293{ 294 unsigned char midi_data = 0; 295 unsigned char cmdout; /* Saved address+IE bit. */ 296 297 /* Make sure clocking edge is down before starting... */ 298 portman_write_data(pm, 0); /* Make sure edge is down. */ 299 300 /* Set destination address to PCP. */ 301 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */ 302 portman_write_command(pm, cmdout); 303 304 while ((portman_read_status(pm) & ESTB) == ESTB) 305 cpu_relax(); /* Wait for strobe echo. */ 306 307 /* After the address lines settle, check multiplexed RxAvail signal. 308 * If data is available, read it. 309 */ 310 if ((portman_read_status(pm) & RXAVAIL) == 0) 311 return -1; /* No data. */ 312 313 /* Set the Strobe signal to enable the Rx clocking circuitry. */ 314 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */ 315 316 while ((portman_read_status(pm) & ESTB) == 0) 317 cpu_relax(); /* Wait for strobe echo. */ 318 319 /* The first data bit (msb) is already sitting on the input line. */ 320 midi_data = (portman_read_status(pm) & 128); 321 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 322 323 /* Data bit 6. */ 324 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 325 midi_data |= (portman_read_status(pm) >> 1) & 64; 326 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 327 328 /* Data bit 5. */ 329 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 330 midi_data |= (portman_read_status(pm) >> 2) & 32; 331 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 332 333 /* Data bit 4. */ 334 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 335 midi_data |= (portman_read_status(pm) >> 3) & 16; 336 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 337 338 /* Data bit 3. */ 339 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 340 midi_data |= (portman_read_status(pm) >> 4) & 8; 341 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 342 343 /* Data bit 2. */ 344 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 345 midi_data |= (portman_read_status(pm) >> 5) & 4; 346 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 347 348 /* Data bit 1. */ 349 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 350 midi_data |= (portman_read_status(pm) >> 6) & 2; 351 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 352 353 /* Data bit 0. */ 354 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 355 midi_data |= (portman_read_status(pm) >> 7) & 1; 356 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 357 portman_write_data(pm, 0); /* Return data clock low. */ 358 359 360 /* De-assert Strobe and return data. */ 361 portman_write_command(pm, cmdout); /* Output saved address+IE. */ 362 363 /* Wait for strobe echo. */ 364 while ((portman_read_status(pm) & ESTB) == ESTB) 365 cpu_relax(); 366 367 return (midi_data & 255); /* Shift back and return value. */ 368} 369 370/* 371 * Checks if any input data on the given channel is available 372 * Checks RxAvail 373 */ 374static int portman_data_avail(struct portman *pm, int channel) 375{ 376 int command = INT_EN; 377 switch (channel) { 378 case 0: 379 command |= RXDATA0; 380 break; 381 case 1: 382 command |= RXDATA1; 383 break; 384 } 385 /* Write hardware (assumme STROBE=0) */ 386 portman_write_command(pm, command); 387 /* Check multiplexed RxAvail signal */ 388 if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL) 389 return 1; /* Data available */ 390 391 /* No Data available */ 392 return 0; 393} 394 395 396/* 397 * Flushes any input 398 */ 399static void portman_flush_input(struct portman *pm, unsigned char port) 400{ 401 /* Local variable for counting things */ 402 unsigned int i = 0; 403 unsigned char command = 0; 404 405 switch (port) { 406 case 0: 407 command = RXDATA0; 408 break; 409 case 1: 410 command = RXDATA1; 411 break; 412 default: 413 snd_printk(KERN_WARNING 414 "portman_flush_input() Won't flush port %i\n", 415 port); 416 return; 417 } 418 419 /* Set address for specified channel in port and allow to settle. */ 420 portman_write_command(pm, command); 421 422 /* Assert the Strobe and wait for echo back. */ 423 portman_write_command(pm, command | STROBE); 424 425 /* Wait for ESTB */ 426 while ((portman_read_status(pm) & ESTB) == 0) 427 cpu_relax(); 428 429 /* Output clock cycles to the Rx circuitry. */ 430 portman_write_data(pm, 0); 431 432 /* Flush 250 bits... */ 433 for (i = 0; i < 250; i++) { 434 portman_write_data(pm, 1); 435 portman_write_data(pm, 0); 436 } 437 438 /* Deassert the Strobe signal of the port and wait for it to settle. */ 439 portman_write_command(pm, command | INT_EN); 440 441 /* Wait for settling */ 442 while ((portman_read_status(pm) & ESTB) == ESTB) 443 cpu_relax(); 444} 445 446static int portman_probe(struct parport *p) 447{ 448 /* Initialize the parallel port data register. Will set Rx clocks 449 * low in case we happen to be addressing the Rx ports at this time. 450 */ 451 /* 1 */ 452 parport_write_data(p, 0); 453 454 /* Initialize the parallel port command register, thus initializing 455 * hardware handshake lines to midi box: 456 * 457 * Strobe = 0 458 * Interrupt Enable = 0 459 */ 460 /* 2 */ 461 parport_write_control(p, 0); 462 463 /* Check if Portman PC/P 2x4 is out there. */ 464 /* 3 */ 465 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */ 466 467 /* Check for ESTB to be clear */ 468 /* 4 */ 469 if ((parport_read_status(p) & ESTB) == ESTB) 470 return 1; /* CODE 1 - Strobe Failure. */ 471 472 /* Set for RXDATA0 where no damage will be done. */ 473 /* 5 */ 474 parport_write_control(p, RXDATA0 + STROBE); /* Write Strobe=1 to command reg. */ 475 476 /* 6 */ 477 if ((parport_read_status(p) & ESTB) != ESTB) 478 return 1; /* CODE 1 - Strobe Failure. */ 479 480 /* 7 */ 481 parport_write_control(p, 0); /* Reset Strobe=0. */ 482 483 /* Check if Tx circuitry is functioning properly. If initialized 484 * unit TxEmpty is false, send out char and see if if goes true. 485 */ 486 /* 8 */ 487 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */ 488 489 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 490 * Status Register), then go write data. Else go back and wait. 491 */ 492 /* 9 */ 493 if ((parport_read_status(p) & TXEMPTY) == 0) 494 return 2; 495 496 /* Return OK status. */ 497 return 0; 498} 499 500static int portman_device_init(struct portman *pm) 501{ 502 portman_flush_input(pm, 0); 503 portman_flush_input(pm, 1); 504 505 return 0; 506} 507 508/********************************************************************* 509 * Rawmidi 510 *********************************************************************/ 511static int snd_portman_midi_open(struct snd_rawmidi_substream *substream) 512{ 513 return 0; 514} 515 516static int snd_portman_midi_close(struct snd_rawmidi_substream *substream) 517{ 518 return 0; 519} 520 521static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream, 522 int up) 523{ 524 struct portman *pm = substream->rmidi->private_data; 525 unsigned long flags; 526 527 spin_lock_irqsave(&pm->reg_lock, flags); 528 if (up) 529 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED; 530 else 531 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED; 532 spin_unlock_irqrestore(&pm->reg_lock, flags); 533} 534 535static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream, 536 int up) 537{ 538 struct portman *pm = substream->rmidi->private_data; 539 unsigned long flags; 540 unsigned char byte; 541 542 spin_lock_irqsave(&pm->reg_lock, flags); 543 if (up) { 544 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1)) 545 portman_write_midi(pm, substream->number, byte); 546 } 547 spin_unlock_irqrestore(&pm->reg_lock, flags); 548} 549 550static struct snd_rawmidi_ops snd_portman_midi_output = { 551 .open = snd_portman_midi_open, 552 .close = snd_portman_midi_close, 553 .trigger = snd_portman_midi_output_trigger, 554}; 555 556static struct snd_rawmidi_ops snd_portman_midi_input = { 557 .open = snd_portman_midi_open, 558 .close = snd_portman_midi_close, 559 .trigger = snd_portman_midi_input_trigger, 560}; 561 562/* Create and initialize the rawmidi component */ 563static int __devinit snd_portman_rawmidi_create(struct snd_card *card) 564{ 565 struct portman *pm = card->private_data; 566 struct snd_rawmidi *rmidi; 567 struct snd_rawmidi_substream *substream; 568 int err; 569 570 err = snd_rawmidi_new(card, CARD_NAME, 0, 571 PORTMAN_NUM_OUTPUT_PORTS, 572 PORTMAN_NUM_INPUT_PORTS, 573 &rmidi); 574 if (err < 0) 575 return err; 576 577 rmidi->private_data = pm; 578 strcpy(rmidi->name, CARD_NAME); 579 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 580 SNDRV_RAWMIDI_INFO_INPUT | 581 SNDRV_RAWMIDI_INFO_DUPLEX; 582 583 pm->rmidi = rmidi; 584 585 /* register rawmidi ops */ 586 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 587 &snd_portman_midi_output); 588 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 589 &snd_portman_midi_input); 590 591 /* name substreams */ 592 /* output */ 593 list_for_each_entry(substream, 594 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, 595 list) { 596 sprintf(substream->name, 597 "Portman2x4 %d", substream->number+1); 598 } 599 /* input */ 600 list_for_each_entry(substream, 601 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, 602 list) { 603 pm->midi_input[substream->number] = substream; 604 sprintf(substream->name, 605 "Portman2x4 %d", substream->number+1); 606 } 607 608 return err; 609} 610 611/********************************************************************* 612 * parport stuff 613 *********************************************************************/ 614static void snd_portman_interrupt(int irq, void *userdata) 615{ 616 unsigned char midivalue = 0; 617 struct portman *pm = ((struct snd_card*)userdata)->private_data; 618 619 spin_lock(&pm->reg_lock); 620 621 /* While any input data is waiting */ 622 while ((portman_read_status(pm) & INT_REQ) == INT_REQ) { 623 /* If data available on channel 0, 624 read it and stuff it into the queue. */ 625 if (portman_data_avail(pm, 0)) { 626 /* Read Midi */ 627 midivalue = portman_read_midi(pm, 0); 628 /* put midi into queue... */ 629 if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 630 snd_rawmidi_receive(pm->midi_input[0], 631 &midivalue, 1); 632 633 } 634 /* If data available on channel 1, 635 read it and stuff it into the queue. */ 636 if (portman_data_avail(pm, 1)) { 637 /* Read Midi */ 638 midivalue = portman_read_midi(pm, 1); 639 /* put midi into queue... */ 640 if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 641 snd_rawmidi_receive(pm->midi_input[1], 642 &midivalue, 1); 643 } 644 645 } 646 647 spin_unlock(&pm->reg_lock); 648} 649 650static int __devinit snd_portman_probe_port(struct parport *p) 651{ 652 struct pardevice *pardev; 653 int res; 654 655 pardev = parport_register_device(p, DRIVER_NAME, 656 NULL, NULL, NULL, 657 0, NULL); 658 if (!pardev) 659 return -EIO; 660 661 if (parport_claim(pardev)) { 662 parport_unregister_device(pardev); 663 return -EIO; 664 } 665 666 res = portman_probe(p); 667 668 parport_release(pardev); 669 parport_unregister_device(pardev); 670 671 return res; 672} 673 674static void __devinit snd_portman_attach(struct parport *p) 675{ 676 struct platform_device *device; 677 678 device = platform_device_alloc(PLATFORM_DRIVER, device_count); 679 if (!device) 680 return; 681 682 /* Temporary assignment to forward the parport */ 683 platform_set_drvdata(device, p); 684 685 if (platform_device_add(device) < 0) { 686 platform_device_put(device); 687 return; 688 } 689 690 /* Since we dont get the return value of probe 691 * We need to check if device probing succeeded or not */ 692 if (!platform_get_drvdata(device)) { 693 platform_device_unregister(device); 694 return; 695 } 696 697 /* register device in global table */ 698 platform_devices[device_count] = device; 699 device_count++; 700} 701 702static void snd_portman_detach(struct parport *p) 703{ 704 /* nothing to do here */ 705} 706 707static struct parport_driver portman_parport_driver = { 708 .name = "portman2x4", 709 .attach = snd_portman_attach, 710 .detach = snd_portman_detach 711}; 712 713/********************************************************************* 714 * platform stuff 715 *********************************************************************/ 716static void snd_portman_card_private_free(struct snd_card *card) 717{ 718 struct portman *pm = card->private_data; 719 struct pardevice *pardev = pm->pardev; 720 721 if (pardev) { 722 if (pm->pardev_claimed) 723 parport_release(pardev); 724 parport_unregister_device(pardev); 725 } 726 727 portman_free(pm); 728} 729 730static int __devinit snd_portman_probe(struct platform_device *pdev) 731{ 732 struct pardevice *pardev; 733 struct parport *p; 734 int dev = pdev->id; 735 struct snd_card *card = NULL; 736 struct portman *pm = NULL; 737 int err; 738 739 p = platform_get_drvdata(pdev); 740 platform_set_drvdata(pdev, NULL); 741 742 if (dev >= SNDRV_CARDS) 743 return -ENODEV; 744 if (!enable[dev]) 745 return -ENOENT; 746 747 if ((err = snd_portman_probe_port(p)) < 0) 748 return err; 749 750 card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0); 751 if (card == NULL) { 752 snd_printd("Cannot create card\n"); 753 return -ENOMEM; 754 } 755 strcpy(card->driver, DRIVER_NAME); 756 strcpy(card->shortname, CARD_NAME); 757 sprintf(card->longname, "%s at 0x%lx, irq %i", 758 card->shortname, p->base, p->irq); 759 760 pardev = parport_register_device(p, /* port */ 761 DRIVER_NAME, /* name */ 762 NULL, /* preempt */ 763 NULL, /* wakeup */ 764 snd_portman_interrupt, /* ISR */ 765 PARPORT_DEV_EXCL, /* flags */ 766 (void *)card); /* private */ 767 if (pardev == NULL) { 768 snd_printd("Cannot register pardevice\n"); 769 err = -EIO; 770 goto __err; 771 } 772 773 if ((err = portman_create(card, pardev, &pm)) < 0) { 774 snd_printd("Cannot create main component\n"); 775 parport_unregister_device(pardev); 776 goto __err; 777 } 778 card->private_data = pm; 779 card->private_free = snd_portman_card_private_free; 780 781 if ((err = snd_portman_rawmidi_create(card)) < 0) { 782 snd_printd("Creating Rawmidi component failed\n"); 783 goto __err; 784 } 785 786 /* claim parport */ 787 if (parport_claim(pardev)) { 788 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base); 789 err = -EIO; 790 goto __err; 791 } 792 pm->pardev_claimed = 1; 793 794 /* init device */ 795 if ((err = portman_device_init(pm)) < 0) 796 goto __err; 797 798 platform_set_drvdata(pdev, card); 799 800 /* At this point card will be usable */ 801 if ((err = snd_card_register(card)) < 0) { 802 snd_printd("Cannot register card\n"); 803 goto __err; 804 } 805 806 snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base); 807 return 0; 808 809__err: 810 snd_card_free(card); 811 return err; 812} 813 814static int __devexit snd_portman_remove(struct platform_device *pdev) 815{ 816 struct snd_card *card = platform_get_drvdata(pdev); 817 818 if (card) 819 snd_card_free(card); 820 821 return 0; 822} 823 824 825static struct platform_driver snd_portman_driver = { 826 .probe = snd_portman_probe, 827 .remove = __devexit_p(snd_portman_remove), 828 .driver = { 829 .name = PLATFORM_DRIVER 830 } 831}; 832 833/********************************************************************* 834 * module init stuff 835 *********************************************************************/ 836static void __init_or_module snd_portman_unregister_all(void) 837{ 838 int i; 839 840 for (i = 0; i < SNDRV_CARDS; ++i) { 841 if (platform_devices[i]) { 842 platform_device_unregister(platform_devices[i]); 843 platform_devices[i] = NULL; 844 } 845 } 846 platform_driver_unregister(&snd_portman_driver); 847 parport_unregister_driver(&portman_parport_driver); 848} 849 850static int __init snd_portman_module_init(void) 851{ 852 int err; 853 854 if ((err = platform_driver_register(&snd_portman_driver)) < 0) 855 return err; 856 857 if (parport_register_driver(&portman_parport_driver) != 0) { 858 platform_driver_unregister(&snd_portman_driver); 859 return -EIO; 860 } 861 862 if (device_count == 0) { 863 snd_portman_unregister_all(); 864 return -ENODEV; 865 } 866 867 return 0; 868} 869 870static void __exit snd_portman_module_exit(void) 871{ 872 snd_portman_unregister_all(); 873} 874 875module_init(snd_portman_module_init); 876module_exit(snd_portman_module_exit); 877