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, 0444); 64 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard."); 65 module_param_array(id, charp, NULL, 0444); 66 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard."); 67 module_param_array(enable, bool, NULL, 0444); 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 open_count; 87 int mode[PORTMAN_NUM_INPUT_PORTS]; 88 struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS]; 89 }; 90 91 static int portman_free(struct portman *pm) 92 { 93 kfree(pm); 94 return 0; 95 } 96 97 static int portman_create(struct snd_card *card, 98 struct pardevice *pardev, 99 struct portman **rchip) 100 { 101 struct portman *pm; 102 103 *rchip = NULL; 104 105 pm = kzalloc(sizeof(struct portman), GFP_KERNEL); 106 if (pm == NULL) 107 return -ENOMEM; 108 109 /* Init chip specific data */ 110 spin_lock_init(&pm->reg_lock); 111 pm->card = card; 112 pm->pardev = pardev; 113 114 *rchip = pm; 115 116 return 0; 117 } 118 119 /********************************************************************* 120 * HW related constants 121 *********************************************************************/ 122 123 /* Standard PC parallel port status register equates. */ 124 #define PP_STAT_BSY 0x80 /* Busy status. Inverted. */ 125 #define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */ 126 #define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */ 127 #define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */ 128 #define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */ 129 130 /* Standard PC parallel port command register equates. */ 131 #define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */ 132 #define PP_CMD_SELI 0x08 /* Select Input. Inverted. */ 133 #define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */ 134 #define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */ 135 #define PP_CMD_STB 0x01 /* Strobe. Inverted. */ 136 137 /* Parallel Port Command Register as implemented by PCP2x4. */ 138 #define INT_EN PP_CMD_IEN /* Interrupt enable. */ 139 #define STROBE PP_CMD_STB /* Command strobe. */ 140 141 /* The parallel port command register field (b1..b3) selects the 142 * various "registers" within the PC/P 2x4. These are the internal 143 * address of these "registers" that must be written to the parallel 144 * port command register. 145 */ 146 #define RXDATA0 (0 << 1) /* PCP RxData channel 0. */ 147 #define RXDATA1 (1 << 1) /* PCP RxData channel 1. */ 148 #define GEN_CTL (2 << 1) /* PCP General Control Register. */ 149 #define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */ 150 #define TXDATA0 (4 << 1) /* PCP TxData channel 0. */ 151 #define TXDATA1 (5 << 1) /* PCP TxData channel 1. */ 152 #define TXDATA2 (6 << 1) /* PCP TxData channel 2. */ 153 #define TXDATA3 (7 << 1) /* PCP TxData channel 3. */ 154 155 /* Parallel Port Status Register as implemented by PCP2x4. */ 156 #define ESTB PP_STAT_POUT /* Echoed strobe. */ 157 #define INT_REQ PP_STAT_ACK /* Input data int request. */ 158 #define BUSY PP_STAT_ERR /* Interface Busy. */ 159 160 /* Parallel Port Status Register BUSY and SELECT lines are multiplexed 161 * between several functions. Depending on which 2x4 "register" is 162 * currently selected (b1..b3), the BUSY and SELECT lines are 163 * assigned as follows: 164 * 165 * SELECT LINE: A3 A2 A1 166 * -------- 167 */ 168 #define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */ 169 // RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */ 170 #define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */ 171 // /* Reserved. 0 1 1 */ 172 #define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */ 173 // TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */ 174 // TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */ 175 // TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */ 176 177 /* BUSY LINE: A3 A2 A1 178 * -------- 179 */ 180 #define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */ 181 // RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */ 182 #define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */ 183 /* Reserved. 0 1 1 */ 184 #define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */ 185 #define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */ 186 #define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */ 187 #define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */ 188 189 #define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01 190 191 /********************************************************************* 192 * Hardware specific functions 193 *********************************************************************/ 194 static inline void portman_write_command(struct portman *pm, u8 value) 195 { 196 parport_write_control(pm->pardev->port, value); 197 } 198 199 static inline u8 portman_read_command(struct portman *pm) 200 { 201 return parport_read_control(pm->pardev->port); 202 } 203 204 static inline u8 portman_read_status(struct portman *pm) 205 { 206 return parport_read_status(pm->pardev->port); 207 } 208 209 static inline u8 portman_read_data(struct portman *pm) 210 { 211 return parport_read_data(pm->pardev->port); 212 } 213 214 static inline void portman_write_data(struct portman *pm, u8 value) 215 { 216 parport_write_data(pm->pardev->port, value); 217 } 218 219 static void portman_write_midi(struct portman *pm, 220 int port, u8 mididata) 221 { 222 int command = ((port + 4) << 1); 223 224 /* Get entering data byte and port number in BL and BH respectively. 225 * Set up Tx Channel address field for use with PP Cmd Register. 226 * Store address field in BH register. 227 * Inputs: AH = Output port number (0..3). 228 * AL = Data byte. 229 * command = TXDATA0 | INT_EN; 230 * Align port num with address field (b1...b3), 231 * set address for TXDatax, Strobe=0 232 */ 233 command |= INT_EN; 234 235 /* Disable interrupts so that the process is not interrupted, then 236 * write the address associated with the current Tx channel to the 237 * PP Command Reg. Do not set the Strobe signal yet. 238 */ 239 240 do { 241 portman_write_command(pm, command); 242 243 /* While the address lines settle, write parallel output data to 244 * PP Data Reg. This has no effect until Strobe signal is asserted. 245 */ 246 247 portman_write_data(pm, mididata); 248 249 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 250 * Status Register), then go write data. Else go back and wait. 251 */ 252 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY); 253 254 /* TxEmpty is set. Maintain PC/P destination address and assert 255 * Strobe through the PP Command Reg. This will Strobe data into 256 * the PC/P transmitter and set the PC/P BUSY signal. 257 */ 258 259 portman_write_command(pm, command | STROBE); 260 261 /* Wait for strobe line to settle and echo back through hardware. 262 * Once it has echoed back, assume that the address and data lines 263 * have settled! 264 */ 265 266 while ((portman_read_status(pm) & ESTB) == 0) 267 cpu_relax(); 268 269 /* Release strobe and immediately re-allow interrupts. */ 270 portman_write_command(pm, command); 271 272 while ((portman_read_status(pm) & ESTB) == ESTB) 273 cpu_relax(); 274 275 /* PC/P BUSY is now set. We must wait until BUSY resets itself. 276 * We'll reenable ints while we're waiting. 277 */ 278 279 while ((portman_read_status(pm) & BUSY) == BUSY) 280 cpu_relax(); 281 282 /* Data sent. */ 283 } 284 285 286 /* 287 * Read MIDI byte from port 288 * Attempt to read input byte from specified hardware input port (0..). 289 * Return -1 if no data 290 */ 291 static int portman_read_midi(struct portman *pm, int port) 292 { 293 unsigned char midi_data = 0; 294 unsigned char cmdout; /* Saved address+IE bit. */ 295 296 /* Make sure clocking edge is down before starting... */ 297 portman_write_data(pm, 0); /* Make sure edge is down. */ 298 299 /* Set destination address to PCP. */ 300 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */ 301 portman_write_command(pm, cmdout); 302 303 while ((portman_read_status(pm) & ESTB) == ESTB) 304 cpu_relax(); /* Wait for strobe echo. */ 305 306 /* After the address lines settle, check multiplexed RxAvail signal. 307 * If data is available, read it. 308 */ 309 if ((portman_read_status(pm) & RXAVAIL) == 0) 310 return -1; /* No data. */ 311 312 /* Set the Strobe signal to enable the Rx clocking circuitry. */ 313 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */ 314 315 while ((portman_read_status(pm) & ESTB) == 0) 316 cpu_relax(); /* Wait for strobe echo. */ 317 318 /* The first data bit (msb) is already sitting on the input line. */ 319 midi_data = (portman_read_status(pm) & 128); 320 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 321 322 /* Data bit 6. */ 323 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 324 midi_data |= (portman_read_status(pm) >> 1) & 64; 325 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 326 327 /* Data bit 5. */ 328 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 329 midi_data |= (portman_read_status(pm) >> 2) & 32; 330 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 331 332 /* Data bit 4. */ 333 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 334 midi_data |= (portman_read_status(pm) >> 3) & 16; 335 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 336 337 /* Data bit 3. */ 338 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 339 midi_data |= (portman_read_status(pm) >> 4) & 8; 340 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 341 342 /* Data bit 2. */ 343 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 344 midi_data |= (portman_read_status(pm) >> 5) & 4; 345 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 346 347 /* Data bit 1. */ 348 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 349 midi_data |= (portman_read_status(pm) >> 6) & 2; 350 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 351 352 /* Data bit 0. */ 353 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 354 midi_data |= (portman_read_status(pm) >> 7) & 1; 355 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 356 portman_write_data(pm, 0); /* Return data clock low. */ 357 358 359 /* De-assert Strobe and return data. */ 360 portman_write_command(pm, cmdout); /* Output saved address+IE. */ 361 362 /* Wait for strobe echo. */ 363 while ((portman_read_status(pm) & ESTB) == ESTB) 364 cpu_relax(); 365 366 return (midi_data & 255); /* Shift back and return value. */ 367 } 368 369 /* 370 * Checks if any input data on the given channel is available 371 * Checks RxAvail 372 */ 373 static int portman_data_avail(struct portman *pm, int channel) 374 { 375 int command = INT_EN; 376 switch (channel) { 377 case 0: 378 command |= RXDATA0; 379 break; 380 case 1: 381 command |= RXDATA1; 382 break; 383 } 384 /* Write hardware (assumme STROBE=0) */ 385 portman_write_command(pm, command); 386 /* Check multiplexed RxAvail signal */ 387 if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL) 388 return 1; /* Data available */ 389 390 /* No Data available */ 391 return 0; 392 } 393 394 395 /* 396 * Flushes any input 397 */ 398 static void portman_flush_input(struct portman *pm, unsigned char port) 399 { 400 /* Local variable for counting things */ 401 unsigned int i = 0; 402 unsigned char command = 0; 403 404 switch (port) { 405 case 0: 406 command = RXDATA0; 407 break; 408 case 1: 409 command = RXDATA1; 410 break; 411 default: 412 snd_printk(KERN_WARNING 413 "portman_flush_input() Won't flush port %i\n", 414 port); 415 return; 416 } 417 418 /* Set address for specified channel in port and allow to settle. */ 419 portman_write_command(pm, command); 420 421 /* Assert the Strobe and wait for echo back. */ 422 portman_write_command(pm, command | STROBE); 423 424 /* Wait for ESTB */ 425 while ((portman_read_status(pm) & ESTB) == 0) 426 cpu_relax(); 427 428 /* Output clock cycles to the Rx circuitry. */ 429 portman_write_data(pm, 0); 430 431 /* Flush 250 bits... */ 432 for (i = 0; i < 250; i++) { 433 portman_write_data(pm, 1); 434 portman_write_data(pm, 0); 435 } 436 437 /* Deassert the Strobe signal of the port and wait for it to settle. */ 438 portman_write_command(pm, command | INT_EN); 439 440 /* Wait for settling */ 441 while ((portman_read_status(pm) & ESTB) == ESTB) 442 cpu_relax(); 443 } 444 445 static int portman_probe(struct parport *p) 446 { 447 /* Initialize the parallel port data register. Will set Rx clocks 448 * low in case we happen to be addressing the Rx ports at this time. 449 */ 450 /* 1 */ 451 parport_write_data(p, 0); 452 453 /* Initialize the parallel port command register, thus initializing 454 * hardware handshake lines to midi box: 455 * 456 * Strobe = 0 457 * Interrupt Enable = 0 458 */ 459 /* 2 */ 460 parport_write_control(p, 0); 461 462 /* Check if Portman PC/P 2x4 is out there. */ 463 /* 3 */ 464 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */ 465 466 /* Check for ESTB to be clear */ 467 /* 4 */ 468 if ((parport_read_status(p) & ESTB) == ESTB) 469 return 1; /* CODE 1 - Strobe Failure. */ 470 471 /* Set for RXDATA0 where no damage will be done. */ 472 /* 5 */ 473 parport_write_control(p, RXDATA0 + STROBE); /* Write Strobe=1 to command reg. */ 474 475 /* 6 */ 476 if ((parport_read_status(p) & ESTB) != ESTB) 477 return 1; /* CODE 1 - Strobe Failure. */ 478 479 /* 7 */ 480 parport_write_control(p, 0); /* Reset Strobe=0. */ 481 482 /* Check if Tx circuitry is functioning properly. If initialized 483 * unit TxEmpty is false, send out char and see if if goes true. 484 */ 485 /* 8 */ 486 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */ 487 488 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 489 * Status Register), then go write data. Else go back and wait. 490 */ 491 /* 9 */ 492 if ((parport_read_status(p) & TXEMPTY) == 0) 493 return 2; 494 495 /* Return OK status. */ 496 return 0; 497 } 498 499 static int portman_device_init(struct portman *pm) 500 { 501 portman_flush_input(pm, 0); 502 portman_flush_input(pm, 1); 503 504 return 0; 505 } 506 507 /********************************************************************* 508 * Rawmidi 509 *********************************************************************/ 510 static int snd_portman_midi_open(struct snd_rawmidi_substream *substream) 511 { 512 return 0; 513 } 514 515 static int snd_portman_midi_close(struct snd_rawmidi_substream *substream) 516 { 517 return 0; 518 } 519 520 static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream, 521 int up) 522 { 523 struct portman *pm = substream->rmidi->private_data; 524 unsigned long flags; 525 526 spin_lock_irqsave(&pm->reg_lock, flags); 527 if (up) 528 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED; 529 else 530 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED; 531 spin_unlock_irqrestore(&pm->reg_lock, flags); 532 } 533 534 static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream, 535 int up) 536 { 537 struct portman *pm = substream->rmidi->private_data; 538 unsigned long flags; 539 unsigned char byte; 540 541 spin_lock_irqsave(&pm->reg_lock, flags); 542 if (up) { 543 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1)) 544 portman_write_midi(pm, substream->number, byte); 545 } 546 spin_unlock_irqrestore(&pm->reg_lock, flags); 547 } 548 549 static const struct snd_rawmidi_ops snd_portman_midi_output = { 550 .open = snd_portman_midi_open, 551 .close = snd_portman_midi_close, 552 .trigger = snd_portman_midi_output_trigger, 553 }; 554 555 static const struct snd_rawmidi_ops snd_portman_midi_input = { 556 .open = snd_portman_midi_open, 557 .close = snd_portman_midi_close, 558 .trigger = snd_portman_midi_input_trigger, 559 }; 560 561 /* Create and initialize the rawmidi component */ 562 static int snd_portman_rawmidi_create(struct snd_card *card) 563 { 564 struct portman *pm = card->private_data; 565 struct snd_rawmidi *rmidi; 566 struct snd_rawmidi_substream *substream; 567 int err; 568 569 err = snd_rawmidi_new(card, CARD_NAME, 0, 570 PORTMAN_NUM_OUTPUT_PORTS, 571 PORTMAN_NUM_INPUT_PORTS, 572 &rmidi); 573 if (err < 0) 574 return err; 575 576 rmidi->private_data = pm; 577 strcpy(rmidi->name, CARD_NAME); 578 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 579 SNDRV_RAWMIDI_INFO_INPUT | 580 SNDRV_RAWMIDI_INFO_DUPLEX; 581 582 pm->rmidi = rmidi; 583 584 /* register rawmidi ops */ 585 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 586 &snd_portman_midi_output); 587 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 588 &snd_portman_midi_input); 589 590 /* name substreams */ 591 /* output */ 592 list_for_each_entry(substream, 593 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, 594 list) { 595 sprintf(substream->name, 596 "Portman2x4 %d", substream->number+1); 597 } 598 /* input */ 599 list_for_each_entry(substream, 600 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, 601 list) { 602 pm->midi_input[substream->number] = substream; 603 sprintf(substream->name, 604 "Portman2x4 %d", substream->number+1); 605 } 606 607 return err; 608 } 609 610 /********************************************************************* 611 * parport stuff 612 *********************************************************************/ 613 static void snd_portman_interrupt(void *userdata) 614 { 615 unsigned char midivalue = 0; 616 struct portman *pm = ((struct snd_card*)userdata)->private_data; 617 618 spin_lock(&pm->reg_lock); 619 620 /* While any input data is waiting */ 621 while ((portman_read_status(pm) & INT_REQ) == INT_REQ) { 622 /* If data available on channel 0, 623 read it and stuff it into the queue. */ 624 if (portman_data_avail(pm, 0)) { 625 /* Read Midi */ 626 midivalue = portman_read_midi(pm, 0); 627 /* put midi into queue... */ 628 if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 629 snd_rawmidi_receive(pm->midi_input[0], 630 &midivalue, 1); 631 632 } 633 /* If data available on channel 1, 634 read it and stuff it into the queue. */ 635 if (portman_data_avail(pm, 1)) { 636 /* Read Midi */ 637 midivalue = portman_read_midi(pm, 1); 638 /* put midi into queue... */ 639 if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 640 snd_rawmidi_receive(pm->midi_input[1], 641 &midivalue, 1); 642 } 643 644 } 645 646 spin_unlock(&pm->reg_lock); 647 } 648 649 static void snd_portman_attach(struct parport *p) 650 { 651 struct platform_device *device; 652 653 device = platform_device_alloc(PLATFORM_DRIVER, device_count); 654 if (!device) 655 return; 656 657 /* Temporary assignment to forward the parport */ 658 platform_set_drvdata(device, p); 659 660 if (platform_device_add(device) < 0) { 661 platform_device_put(device); 662 return; 663 } 664 665 /* Since we dont get the return value of probe 666 * We need to check if device probing succeeded or not */ 667 if (!platform_get_drvdata(device)) { 668 platform_device_unregister(device); 669 return; 670 } 671 672 /* register device in global table */ 673 platform_devices[device_count] = device; 674 device_count++; 675 } 676 677 static void snd_portman_detach(struct parport *p) 678 { 679 /* nothing to do here */ 680 } 681 682 static int snd_portman_dev_probe(struct pardevice *pardev) 683 { 684 if (strcmp(pardev->name, DRIVER_NAME)) 685 return -ENODEV; 686 687 return 0; 688 } 689 690 static struct parport_driver portman_parport_driver = { 691 .name = "portman2x4", 692 .probe = snd_portman_dev_probe, 693 .match_port = snd_portman_attach, 694 .detach = snd_portman_detach, 695 .devmodel = true, 696 }; 697 698 /********************************************************************* 699 * platform stuff 700 *********************************************************************/ 701 static void snd_portman_card_private_free(struct snd_card *card) 702 { 703 struct portman *pm = card->private_data; 704 struct pardevice *pardev = pm->pardev; 705 706 if (pardev) { 707 parport_release(pardev); 708 parport_unregister_device(pardev); 709 } 710 711 portman_free(pm); 712 } 713 714 static int snd_portman_probe(struct platform_device *pdev) 715 { 716 struct pardevice *pardev; 717 struct parport *p; 718 int dev = pdev->id; 719 struct snd_card *card = NULL; 720 struct portman *pm = NULL; 721 int err; 722 struct pardev_cb portman_cb = { 723 .preempt = NULL, 724 .wakeup = NULL, 725 .irq_func = snd_portman_interrupt, /* ISR */ 726 .flags = PARPORT_DEV_EXCL, /* flags */ 727 }; 728 729 p = platform_get_drvdata(pdev); 730 platform_set_drvdata(pdev, NULL); 731 732 if (dev >= SNDRV_CARDS) 733 return -ENODEV; 734 if (!enable[dev]) 735 return -ENOENT; 736 737 err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE, 738 0, &card); 739 if (err < 0) { 740 snd_printd("Cannot create card\n"); 741 return err; 742 } 743 strcpy(card->driver, DRIVER_NAME); 744 strcpy(card->shortname, CARD_NAME); 745 sprintf(card->longname, "%s at 0x%lx, irq %i", 746 card->shortname, p->base, p->irq); 747 748 portman_cb.private = card; /* private */ 749 pardev = parport_register_dev_model(p, /* port */ 750 DRIVER_NAME, /* name */ 751 &portman_cb, /* callbacks */ 752 pdev->id); /* device number */ 753 if (pardev == NULL) { 754 snd_printd("Cannot register pardevice\n"); 755 err = -EIO; 756 goto __err; 757 } 758 759 /* claim parport */ 760 if (parport_claim(pardev)) { 761 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base); 762 err = -EIO; 763 goto free_pardev; 764 } 765 766 if ((err = portman_create(card, pardev, &pm)) < 0) { 767 snd_printd("Cannot create main component\n"); 768 goto release_pardev; 769 } 770 card->private_data = pm; 771 card->private_free = snd_portman_card_private_free; 772 773 err = portman_probe(p); 774 if (err) { 775 err = -EIO; 776 goto __err; 777 } 778 779 if ((err = snd_portman_rawmidi_create(card)) < 0) { 780 snd_printd("Creating Rawmidi component failed\n"); 781 goto __err; 782 } 783 784 /* init device */ 785 if ((err = portman_device_init(pm)) < 0) 786 goto __err; 787 788 platform_set_drvdata(pdev, card); 789 790 /* At this point card will be usable */ 791 if ((err = snd_card_register(card)) < 0) { 792 snd_printd("Cannot register card\n"); 793 goto __err; 794 } 795 796 snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base); 797 return 0; 798 799 release_pardev: 800 parport_release(pardev); 801 free_pardev: 802 parport_unregister_device(pardev); 803 __err: 804 snd_card_free(card); 805 return err; 806 } 807 808 static int snd_portman_remove(struct platform_device *pdev) 809 { 810 struct snd_card *card = platform_get_drvdata(pdev); 811 812 if (card) 813 snd_card_free(card); 814 815 return 0; 816 } 817 818 819 static struct platform_driver snd_portman_driver = { 820 .probe = snd_portman_probe, 821 .remove = snd_portman_remove, 822 .driver = { 823 .name = PLATFORM_DRIVER, 824 } 825 }; 826 827 /********************************************************************* 828 * module init stuff 829 *********************************************************************/ 830 static void snd_portman_unregister_all(void) 831 { 832 int i; 833 834 for (i = 0; i < SNDRV_CARDS; ++i) { 835 if (platform_devices[i]) { 836 platform_device_unregister(platform_devices[i]); 837 platform_devices[i] = NULL; 838 } 839 } 840 platform_driver_unregister(&snd_portman_driver); 841 parport_unregister_driver(&portman_parport_driver); 842 } 843 844 static int __init snd_portman_module_init(void) 845 { 846 int err; 847 848 if ((err = platform_driver_register(&snd_portman_driver)) < 0) 849 return err; 850 851 if (parport_register_driver(&portman_parport_driver) != 0) { 852 platform_driver_unregister(&snd_portman_driver); 853 return -EIO; 854 } 855 856 if (device_count == 0) { 857 snd_portman_unregister_all(); 858 return -ENODEV; 859 } 860 861 return 0; 862 } 863 864 static void __exit snd_portman_module_exit(void) 865 { 866 snd_portman_unregister_all(); 867 } 868 869 module_init(snd_portman_module_init); 870 module_exit(snd_portman_module_exit); 871