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 <linux/init.h> 41 #include <linux/platform_device.h> 42 #include <linux/parport.h> 43 #include <linux/spinlock.h> 44 #include <linux/delay.h> 45 #include <linux/slab.h> 46 #include <linux/module.h> 47 #include <sound/core.h> 48 #include <sound/initval.h> 49 #include <sound/rawmidi.h> 50 #include <sound/control.h> 51 52 #define CARD_NAME "Portman 2x4" 53 #define DRIVER_NAME "portman" 54 #define PLATFORM_DRIVER "snd_portman2x4" 55 56 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 57 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 58 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 59 60 static struct platform_device *platform_devices[SNDRV_CARDS]; 61 static int device_count; 62 63 module_param_array(index, int, NULL, S_IRUGO); 64 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard."); 65 module_param_array(id, charp, NULL, S_IRUGO); 66 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard."); 67 module_param_array(enable, bool, NULL, S_IRUGO); 68 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard."); 69 70 MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig"); 71 MODULE_DESCRIPTION("Midiman Portman2x4"); 72 MODULE_LICENSE("GPL"); 73 MODULE_SUPPORTED_DEVICE("{{Midiman,Portman2x4}}"); 74 75 /********************************************************************* 76 * Chip specific 77 *********************************************************************/ 78 #define PORTMAN_NUM_INPUT_PORTS 2 79 #define PORTMAN_NUM_OUTPUT_PORTS 4 80 81 struct portman { 82 spinlock_t reg_lock; 83 struct snd_card *card; 84 struct snd_rawmidi *rmidi; 85 struct pardevice *pardev; 86 int pardev_claimed; 87 88 int open_count; 89 int mode[PORTMAN_NUM_INPUT_PORTS]; 90 struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS]; 91 }; 92 93 static int portman_free(struct portman *pm) 94 { 95 kfree(pm); 96 return 0; 97 } 98 99 static int portman_create(struct snd_card *card, 100 struct pardevice *pardev, 101 struct portman **rchip) 102 { 103 struct portman *pm; 104 105 *rchip = NULL; 106 107 pm = kzalloc(sizeof(struct portman), GFP_KERNEL); 108 if (pm == NULL) 109 return -ENOMEM; 110 111 /* Init chip specific data */ 112 spin_lock_init(&pm->reg_lock); 113 pm->card = card; 114 pm->pardev = pardev; 115 116 *rchip = pm; 117 118 return 0; 119 } 120 121 /********************************************************************* 122 * HW related constants 123 *********************************************************************/ 124 125 /* Standard PC parallel port status register equates. */ 126 #define PP_STAT_BSY 0x80 /* Busy status. Inverted. */ 127 #define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */ 128 #define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */ 129 #define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */ 130 #define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */ 131 132 /* Standard PC parallel port command register equates. */ 133 #define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */ 134 #define PP_CMD_SELI 0x08 /* Select Input. Inverted. */ 135 #define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */ 136 #define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */ 137 #define PP_CMD_STB 0x01 /* Strobe. Inverted. */ 138 139 /* Parallel Port Command Register as implemented by PCP2x4. */ 140 #define INT_EN PP_CMD_IEN /* Interrupt enable. */ 141 #define STROBE PP_CMD_STB /* Command strobe. */ 142 143 /* The parallel port command register field (b1..b3) selects the 144 * various "registers" within the PC/P 2x4. These are the internal 145 * address of these "registers" that must be written to the parallel 146 * port command register. 147 */ 148 #define RXDATA0 (0 << 1) /* PCP RxData channel 0. */ 149 #define RXDATA1 (1 << 1) /* PCP RxData channel 1. */ 150 #define GEN_CTL (2 << 1) /* PCP General Control Register. */ 151 #define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */ 152 #define TXDATA0 (4 << 1) /* PCP TxData channel 0. */ 153 #define TXDATA1 (5 << 1) /* PCP TxData channel 1. */ 154 #define TXDATA2 (6 << 1) /* PCP TxData channel 2. */ 155 #define TXDATA3 (7 << 1) /* PCP TxData channel 3. */ 156 157 /* Parallel Port Status Register as implemented by PCP2x4. */ 158 #define ESTB PP_STAT_POUT /* Echoed strobe. */ 159 #define INT_REQ PP_STAT_ACK /* Input data int request. */ 160 #define BUSY PP_STAT_ERR /* Interface Busy. */ 161 162 /* Parallel Port Status Register BUSY and SELECT lines are multiplexed 163 * between several functions. Depending on which 2x4 "register" is 164 * currently selected (b1..b3), the BUSY and SELECT lines are 165 * assigned as follows: 166 * 167 * SELECT LINE: A3 A2 A1 168 * -------- 169 */ 170 #define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */ 171 // RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */ 172 #define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */ 173 // /* Reserved. 0 1 1 */ 174 #define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */ 175 // TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */ 176 // TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */ 177 // TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */ 178 179 /* BUSY LINE: A3 A2 A1 180 * -------- 181 */ 182 #define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */ 183 // RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */ 184 #define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */ 185 /* Reserved. 0 1 1 */ 186 #define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */ 187 #define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */ 188 #define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */ 189 #define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */ 190 191 #define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01 192 193 /********************************************************************* 194 * Hardware specific functions 195 *********************************************************************/ 196 static inline void portman_write_command(struct portman *pm, u8 value) 197 { 198 parport_write_control(pm->pardev->port, value); 199 } 200 201 static inline u8 portman_read_command(struct portman *pm) 202 { 203 return parport_read_control(pm->pardev->port); 204 } 205 206 static inline u8 portman_read_status(struct portman *pm) 207 { 208 return parport_read_status(pm->pardev->port); 209 } 210 211 static inline u8 portman_read_data(struct portman *pm) 212 { 213 return parport_read_data(pm->pardev->port); 214 } 215 216 static inline void portman_write_data(struct portman *pm, u8 value) 217 { 218 parport_write_data(pm->pardev->port, value); 219 } 220 221 static void portman_write_midi(struct portman *pm, 222 int port, u8 mididata) 223 { 224 int command = ((port + 4) << 1); 225 226 /* Get entering data byte and port number in BL and BH respectively. 227 * Set up Tx Channel address field for use with PP Cmd Register. 228 * Store address field in BH register. 229 * Inputs: AH = Output port number (0..3). 230 * AL = Data byte. 231 * command = TXDATA0 | INT_EN; 232 * Align port num with address field (b1...b3), 233 * set address for TXDatax, Strobe=0 234 */ 235 command |= INT_EN; 236 237 /* Disable interrupts so that the process is not interrupted, then 238 * write the address associated with the current Tx channel to the 239 * PP Command Reg. Do not set the Strobe signal yet. 240 */ 241 242 do { 243 portman_write_command(pm, command); 244 245 /* While the address lines settle, write parallel output data to 246 * PP Data Reg. This has no effect until Strobe signal is asserted. 247 */ 248 249 portman_write_data(pm, mididata); 250 251 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 252 * Status Register), then go write data. Else go back and wait. 253 */ 254 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY); 255 256 /* TxEmpty is set. Maintain PC/P destination address and assert 257 * Strobe through the PP Command Reg. This will Strobe data into 258 * the PC/P transmitter and set the PC/P BUSY signal. 259 */ 260 261 portman_write_command(pm, command | STROBE); 262 263 /* Wait for strobe line to settle and echo back through hardware. 264 * Once it has echoed back, assume that the address and data lines 265 * have settled! 266 */ 267 268 while ((portman_read_status(pm) & ESTB) == 0) 269 cpu_relax(); 270 271 /* Release strobe and immediately re-allow interrupts. */ 272 portman_write_command(pm, command); 273 274 while ((portman_read_status(pm) & ESTB) == ESTB) 275 cpu_relax(); 276 277 /* PC/P BUSY is now set. We must wait until BUSY resets itself. 278 * We'll reenable ints while we're waiting. 279 */ 280 281 while ((portman_read_status(pm) & BUSY) == BUSY) 282 cpu_relax(); 283 284 /* Data sent. */ 285 } 286 287 288 /* 289 * Read MIDI byte from port 290 * Attempt to read input byte from specified hardware input port (0..). 291 * Return -1 if no data 292 */ 293 static int portman_read_midi(struct portman *pm, int port) 294 { 295 unsigned char midi_data = 0; 296 unsigned char cmdout; /* Saved address+IE bit. */ 297 298 /* Make sure clocking edge is down before starting... */ 299 portman_write_data(pm, 0); /* Make sure edge is down. */ 300 301 /* Set destination address to PCP. */ 302 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */ 303 portman_write_command(pm, cmdout); 304 305 while ((portman_read_status(pm) & ESTB) == ESTB) 306 cpu_relax(); /* Wait for strobe echo. */ 307 308 /* After the address lines settle, check multiplexed RxAvail signal. 309 * If data is available, read it. 310 */ 311 if ((portman_read_status(pm) & RXAVAIL) == 0) 312 return -1; /* No data. */ 313 314 /* Set the Strobe signal to enable the Rx clocking circuitry. */ 315 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */ 316 317 while ((portman_read_status(pm) & ESTB) == 0) 318 cpu_relax(); /* Wait for strobe echo. */ 319 320 /* The first data bit (msb) is already sitting on the input line. */ 321 midi_data = (portman_read_status(pm) & 128); 322 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 323 324 /* Data bit 6. */ 325 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 326 midi_data |= (portman_read_status(pm) >> 1) & 64; 327 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 328 329 /* Data bit 5. */ 330 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 331 midi_data |= (portman_read_status(pm) >> 2) & 32; 332 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 333 334 /* Data bit 4. */ 335 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 336 midi_data |= (portman_read_status(pm) >> 3) & 16; 337 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 338 339 /* Data bit 3. */ 340 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 341 midi_data |= (portman_read_status(pm) >> 4) & 8; 342 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 343 344 /* Data bit 2. */ 345 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 346 midi_data |= (portman_read_status(pm) >> 5) & 4; 347 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 348 349 /* Data bit 1. */ 350 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 351 midi_data |= (portman_read_status(pm) >> 6) & 2; 352 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 353 354 /* Data bit 0. */ 355 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 356 midi_data |= (portman_read_status(pm) >> 7) & 1; 357 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 358 portman_write_data(pm, 0); /* Return data clock low. */ 359 360 361 /* De-assert Strobe and return data. */ 362 portman_write_command(pm, cmdout); /* Output saved address+IE. */ 363 364 /* Wait for strobe echo. */ 365 while ((portman_read_status(pm) & ESTB) == ESTB) 366 cpu_relax(); 367 368 return (midi_data & 255); /* Shift back and return value. */ 369 } 370 371 /* 372 * Checks if any input data on the given channel is available 373 * Checks RxAvail 374 */ 375 static int portman_data_avail(struct portman *pm, int channel) 376 { 377 int command = INT_EN; 378 switch (channel) { 379 case 0: 380 command |= RXDATA0; 381 break; 382 case 1: 383 command |= RXDATA1; 384 break; 385 } 386 /* Write hardware (assumme STROBE=0) */ 387 portman_write_command(pm, command); 388 /* Check multiplexed RxAvail signal */ 389 if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL) 390 return 1; /* Data available */ 391 392 /* No Data available */ 393 return 0; 394 } 395 396 397 /* 398 * Flushes any input 399 */ 400 static void portman_flush_input(struct portman *pm, unsigned char port) 401 { 402 /* Local variable for counting things */ 403 unsigned int i = 0; 404 unsigned char command = 0; 405 406 switch (port) { 407 case 0: 408 command = RXDATA0; 409 break; 410 case 1: 411 command = RXDATA1; 412 break; 413 default: 414 snd_printk(KERN_WARNING 415 "portman_flush_input() Won't flush port %i\n", 416 port); 417 return; 418 } 419 420 /* Set address for specified channel in port and allow to settle. */ 421 portman_write_command(pm, command); 422 423 /* Assert the Strobe and wait for echo back. */ 424 portman_write_command(pm, command | STROBE); 425 426 /* Wait for ESTB */ 427 while ((portman_read_status(pm) & ESTB) == 0) 428 cpu_relax(); 429 430 /* Output clock cycles to the Rx circuitry. */ 431 portman_write_data(pm, 0); 432 433 /* Flush 250 bits... */ 434 for (i = 0; i < 250; i++) { 435 portman_write_data(pm, 1); 436 portman_write_data(pm, 0); 437 } 438 439 /* Deassert the Strobe signal of the port and wait for it to settle. */ 440 portman_write_command(pm, command | INT_EN); 441 442 /* Wait for settling */ 443 while ((portman_read_status(pm) & ESTB) == ESTB) 444 cpu_relax(); 445 } 446 447 static int portman_probe(struct parport *p) 448 { 449 /* Initialize the parallel port data register. Will set Rx clocks 450 * low in case we happen to be addressing the Rx ports at this time. 451 */ 452 /* 1 */ 453 parport_write_data(p, 0); 454 455 /* Initialize the parallel port command register, thus initializing 456 * hardware handshake lines to midi box: 457 * 458 * Strobe = 0 459 * Interrupt Enable = 0 460 */ 461 /* 2 */ 462 parport_write_control(p, 0); 463 464 /* Check if Portman PC/P 2x4 is out there. */ 465 /* 3 */ 466 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */ 467 468 /* Check for ESTB to be clear */ 469 /* 4 */ 470 if ((parport_read_status(p) & ESTB) == ESTB) 471 return 1; /* CODE 1 - Strobe Failure. */ 472 473 /* Set for RXDATA0 where no damage will be done. */ 474 /* 5 */ 475 parport_write_control(p, RXDATA0 + STROBE); /* Write Strobe=1 to command reg. */ 476 477 /* 6 */ 478 if ((parport_read_status(p) & ESTB) != ESTB) 479 return 1; /* CODE 1 - Strobe Failure. */ 480 481 /* 7 */ 482 parport_write_control(p, 0); /* Reset Strobe=0. */ 483 484 /* Check if Tx circuitry is functioning properly. If initialized 485 * unit TxEmpty is false, send out char and see if if goes true. 486 */ 487 /* 8 */ 488 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */ 489 490 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 491 * Status Register), then go write data. Else go back and wait. 492 */ 493 /* 9 */ 494 if ((parport_read_status(p) & TXEMPTY) == 0) 495 return 2; 496 497 /* Return OK status. */ 498 return 0; 499 } 500 501 static int portman_device_init(struct portman *pm) 502 { 503 portman_flush_input(pm, 0); 504 portman_flush_input(pm, 1); 505 506 return 0; 507 } 508 509 /********************************************************************* 510 * Rawmidi 511 *********************************************************************/ 512 static int snd_portman_midi_open(struct snd_rawmidi_substream *substream) 513 { 514 return 0; 515 } 516 517 static int snd_portman_midi_close(struct snd_rawmidi_substream *substream) 518 { 519 return 0; 520 } 521 522 static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream, 523 int up) 524 { 525 struct portman *pm = substream->rmidi->private_data; 526 unsigned long flags; 527 528 spin_lock_irqsave(&pm->reg_lock, flags); 529 if (up) 530 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED; 531 else 532 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED; 533 spin_unlock_irqrestore(&pm->reg_lock, flags); 534 } 535 536 static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream, 537 int up) 538 { 539 struct portman *pm = substream->rmidi->private_data; 540 unsigned long flags; 541 unsigned char byte; 542 543 spin_lock_irqsave(&pm->reg_lock, flags); 544 if (up) { 545 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1)) 546 portman_write_midi(pm, substream->number, byte); 547 } 548 spin_unlock_irqrestore(&pm->reg_lock, flags); 549 } 550 551 static struct snd_rawmidi_ops snd_portman_midi_output = { 552 .open = snd_portman_midi_open, 553 .close = snd_portman_midi_close, 554 .trigger = snd_portman_midi_output_trigger, 555 }; 556 557 static struct snd_rawmidi_ops snd_portman_midi_input = { 558 .open = snd_portman_midi_open, 559 .close = snd_portman_midi_close, 560 .trigger = snd_portman_midi_input_trigger, 561 }; 562 563 /* Create and initialize the rawmidi component */ 564 static int snd_portman_rawmidi_create(struct snd_card *card) 565 { 566 struct portman *pm = card->private_data; 567 struct snd_rawmidi *rmidi; 568 struct snd_rawmidi_substream *substream; 569 int err; 570 571 err = snd_rawmidi_new(card, CARD_NAME, 0, 572 PORTMAN_NUM_OUTPUT_PORTS, 573 PORTMAN_NUM_INPUT_PORTS, 574 &rmidi); 575 if (err < 0) 576 return err; 577 578 rmidi->private_data = pm; 579 strcpy(rmidi->name, CARD_NAME); 580 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 581 SNDRV_RAWMIDI_INFO_INPUT | 582 SNDRV_RAWMIDI_INFO_DUPLEX; 583 584 pm->rmidi = rmidi; 585 586 /* register rawmidi ops */ 587 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 588 &snd_portman_midi_output); 589 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 590 &snd_portman_midi_input); 591 592 /* name substreams */ 593 /* output */ 594 list_for_each_entry(substream, 595 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, 596 list) { 597 sprintf(substream->name, 598 "Portman2x4 %d", substream->number+1); 599 } 600 /* input */ 601 list_for_each_entry(substream, 602 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, 603 list) { 604 pm->midi_input[substream->number] = substream; 605 sprintf(substream->name, 606 "Portman2x4 %d", substream->number+1); 607 } 608 609 return err; 610 } 611 612 /********************************************************************* 613 * parport stuff 614 *********************************************************************/ 615 static void snd_portman_interrupt(void *userdata) 616 { 617 unsigned char midivalue = 0; 618 struct portman *pm = ((struct snd_card*)userdata)->private_data; 619 620 spin_lock(&pm->reg_lock); 621 622 /* While any input data is waiting */ 623 while ((portman_read_status(pm) & INT_REQ) == INT_REQ) { 624 /* If data available on channel 0, 625 read it and stuff it into the queue. */ 626 if (portman_data_avail(pm, 0)) { 627 /* Read Midi */ 628 midivalue = portman_read_midi(pm, 0); 629 /* put midi into queue... */ 630 if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 631 snd_rawmidi_receive(pm->midi_input[0], 632 &midivalue, 1); 633 634 } 635 /* If data available on channel 1, 636 read it and stuff it into the queue. */ 637 if (portman_data_avail(pm, 1)) { 638 /* Read Midi */ 639 midivalue = portman_read_midi(pm, 1); 640 /* put midi into queue... */ 641 if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 642 snd_rawmidi_receive(pm->midi_input[1], 643 &midivalue, 1); 644 } 645 646 } 647 648 spin_unlock(&pm->reg_lock); 649 } 650 651 static int snd_portman_probe_port(struct parport *p) 652 { 653 struct pardevice *pardev; 654 int res; 655 656 pardev = parport_register_device(p, DRIVER_NAME, 657 NULL, NULL, NULL, 658 0, NULL); 659 if (!pardev) 660 return -EIO; 661 662 if (parport_claim(pardev)) { 663 parport_unregister_device(pardev); 664 return -EIO; 665 } 666 667 res = portman_probe(p); 668 669 parport_release(pardev); 670 parport_unregister_device(pardev); 671 672 return res ? -EIO : 0; 673 } 674 675 static void snd_portman_attach(struct parport *p) 676 { 677 struct platform_device *device; 678 679 device = platform_device_alloc(PLATFORM_DRIVER, device_count); 680 if (!device) 681 return; 682 683 /* Temporary assignment to forward the parport */ 684 platform_set_drvdata(device, p); 685 686 if (platform_device_add(device) < 0) { 687 platform_device_put(device); 688 return; 689 } 690 691 /* Since we dont get the return value of probe 692 * We need to check if device probing succeeded or not */ 693 if (!platform_get_drvdata(device)) { 694 platform_device_unregister(device); 695 return; 696 } 697 698 /* register device in global table */ 699 platform_devices[device_count] = device; 700 device_count++; 701 } 702 703 static void snd_portman_detach(struct parport *p) 704 { 705 /* nothing to do here */ 706 } 707 708 static struct parport_driver portman_parport_driver = { 709 .name = "portman2x4", 710 .attach = snd_portman_attach, 711 .detach = snd_portman_detach 712 }; 713 714 /********************************************************************* 715 * platform stuff 716 *********************************************************************/ 717 static void snd_portman_card_private_free(struct snd_card *card) 718 { 719 struct portman *pm = card->private_data; 720 struct pardevice *pardev = pm->pardev; 721 722 if (pardev) { 723 if (pm->pardev_claimed) 724 parport_release(pardev); 725 parport_unregister_device(pardev); 726 } 727 728 portman_free(pm); 729 } 730 731 static int snd_portman_probe(struct platform_device *pdev) 732 { 733 struct pardevice *pardev; 734 struct parport *p; 735 int dev = pdev->id; 736 struct snd_card *card = NULL; 737 struct portman *pm = NULL; 738 int err; 739 740 p = platform_get_drvdata(pdev); 741 platform_set_drvdata(pdev, NULL); 742 743 if (dev >= SNDRV_CARDS) 744 return -ENODEV; 745 if (!enable[dev]) 746 return -ENOENT; 747 748 if ((err = snd_portman_probe_port(p)) < 0) 749 return err; 750 751 err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE, 752 0, &card); 753 if (err < 0) { 754 snd_printd("Cannot create card\n"); 755 return err; 756 } 757 strcpy(card->driver, DRIVER_NAME); 758 strcpy(card->shortname, CARD_NAME); 759 sprintf(card->longname, "%s at 0x%lx, irq %i", 760 card->shortname, p->base, p->irq); 761 762 pardev = parport_register_device(p, /* port */ 763 DRIVER_NAME, /* name */ 764 NULL, /* preempt */ 765 NULL, /* wakeup */ 766 snd_portman_interrupt, /* ISR */ 767 PARPORT_DEV_EXCL, /* flags */ 768 (void *)card); /* private */ 769 if (pardev == NULL) { 770 snd_printd("Cannot register pardevice\n"); 771 err = -EIO; 772 goto __err; 773 } 774 775 if ((err = portman_create(card, pardev, &pm)) < 0) { 776 snd_printd("Cannot create main component\n"); 777 parport_unregister_device(pardev); 778 goto __err; 779 } 780 card->private_data = pm; 781 card->private_free = snd_portman_card_private_free; 782 783 if ((err = snd_portman_rawmidi_create(card)) < 0) { 784 snd_printd("Creating Rawmidi component failed\n"); 785 goto __err; 786 } 787 788 /* claim parport */ 789 if (parport_claim(pardev)) { 790 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base); 791 err = -EIO; 792 goto __err; 793 } 794 pm->pardev_claimed = 1; 795 796 /* init device */ 797 if ((err = portman_device_init(pm)) < 0) 798 goto __err; 799 800 platform_set_drvdata(pdev, card); 801 802 /* At this point card will be usable */ 803 if ((err = snd_card_register(card)) < 0) { 804 snd_printd("Cannot register card\n"); 805 goto __err; 806 } 807 808 snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base); 809 return 0; 810 811 __err: 812 snd_card_free(card); 813 return err; 814 } 815 816 static int snd_portman_remove(struct platform_device *pdev) 817 { 818 struct snd_card *card = platform_get_drvdata(pdev); 819 820 if (card) 821 snd_card_free(card); 822 823 return 0; 824 } 825 826 827 static struct platform_driver snd_portman_driver = { 828 .probe = snd_portman_probe, 829 .remove = snd_portman_remove, 830 .driver = { 831 .name = PLATFORM_DRIVER, 832 } 833 }; 834 835 /********************************************************************* 836 * module init stuff 837 *********************************************************************/ 838 static void snd_portman_unregister_all(void) 839 { 840 int i; 841 842 for (i = 0; i < SNDRV_CARDS; ++i) { 843 if (platform_devices[i]) { 844 platform_device_unregister(platform_devices[i]); 845 platform_devices[i] = NULL; 846 } 847 } 848 platform_driver_unregister(&snd_portman_driver); 849 parport_unregister_driver(&portman_parport_driver); 850 } 851 852 static int __init snd_portman_module_init(void) 853 { 854 int err; 855 856 if ((err = platform_driver_register(&snd_portman_driver)) < 0) 857 return err; 858 859 if (parport_register_driver(&portman_parport_driver) != 0) { 860 platform_driver_unregister(&snd_portman_driver); 861 return -EIO; 862 } 863 864 if (device_count == 0) { 865 snd_portman_unregister_all(); 866 return -ENODEV; 867 } 868 869 return 0; 870 } 871 872 static void __exit snd_portman_module_exit(void) 873 { 874 snd_portman_unregister_all(); 875 } 876 877 module_init(snd_portman_module_init); 878 module_exit(snd_portman_module_exit); 879