1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for Midiman Portman2x4 parallel port midi interface 4 * 5 * Copyright (c) by Levent Guendogdu <levon@feature-it.com> 6 * 7 * ChangeLog 8 * Jan 24 2007 Matthias Koenig <mkoenig@suse.de> 9 * - cleanup and rewrite 10 * Sep 30 2004 Tobias Gehrig <tobias@gehrig.tk> 11 * - source code cleanup 12 * Sep 03 2004 Tobias Gehrig <tobias@gehrig.tk> 13 * - fixed compilation problem with alsa 1.0.6a (removed MODULE_CLASSES, 14 * MODULE_PARM_SYNTAX and changed MODULE_DEVICES to 15 * MODULE_SUPPORTED_DEVICE) 16 * Mar 24 2004 Tobias Gehrig <tobias@gehrig.tk> 17 * - added 2.6 kernel support 18 * Mar 18 2004 Tobias Gehrig <tobias@gehrig.tk> 19 * - added parport_unregister_driver to the startup routine if the driver fails to detect a portman 20 * - added support for all 4 output ports in portman_putmidi 21 * Mar 17 2004 Tobias Gehrig <tobias@gehrig.tk> 22 * - added checks for opened input device in interrupt handler 23 * Feb 20 2004 Tobias Gehrig <tobias@gehrig.tk> 24 * - ported from alsa 0.5 to 1.0 25 */ 26 27 #include <linux/init.h> 28 #include <linux/platform_device.h> 29 #include <linux/parport.h> 30 #include <linux/spinlock.h> 31 #include <linux/delay.h> 32 #include <linux/slab.h> 33 #include <linux/module.h> 34 #include <sound/core.h> 35 #include <sound/initval.h> 36 #include <sound/rawmidi.h> 37 #include <sound/control.h> 38 39 #define CARD_NAME "Portman 2x4" 40 #define DRIVER_NAME "portman" 41 #define PLATFORM_DRIVER "snd_portman2x4" 42 43 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; 44 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; 45 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; 46 47 static struct platform_device *platform_devices[SNDRV_CARDS]; 48 static int device_count; 49 50 module_param_array(index, int, NULL, 0444); 51 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard."); 52 module_param_array(id, charp, NULL, 0444); 53 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard."); 54 module_param_array(enable, bool, NULL, 0444); 55 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard."); 56 57 MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig"); 58 MODULE_DESCRIPTION("Midiman Portman2x4"); 59 MODULE_LICENSE("GPL"); 60 61 /********************************************************************* 62 * Chip specific 63 *********************************************************************/ 64 #define PORTMAN_NUM_INPUT_PORTS 2 65 #define PORTMAN_NUM_OUTPUT_PORTS 4 66 67 struct portman { 68 spinlock_t reg_lock; 69 struct snd_card *card; 70 struct snd_rawmidi *rmidi; 71 struct pardevice *pardev; 72 int open_count; 73 int mode[PORTMAN_NUM_INPUT_PORTS]; 74 struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS]; 75 }; 76 77 static int portman_free(struct portman *pm) 78 { 79 kfree(pm); 80 return 0; 81 } 82 83 static int portman_create(struct snd_card *card, 84 struct pardevice *pardev, 85 struct portman **rchip) 86 { 87 struct portman *pm; 88 89 *rchip = NULL; 90 91 pm = kzalloc(sizeof(struct portman), GFP_KERNEL); 92 if (pm == NULL) 93 return -ENOMEM; 94 95 /* Init chip specific data */ 96 spin_lock_init(&pm->reg_lock); 97 pm->card = card; 98 pm->pardev = pardev; 99 100 *rchip = pm; 101 102 return 0; 103 } 104 105 /********************************************************************* 106 * HW related constants 107 *********************************************************************/ 108 109 /* Standard PC parallel port status register equates. */ 110 #define PP_STAT_BSY 0x80 /* Busy status. Inverted. */ 111 #define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */ 112 #define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */ 113 #define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */ 114 #define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */ 115 116 /* Standard PC parallel port command register equates. */ 117 #define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */ 118 #define PP_CMD_SELI 0x08 /* Select Input. Inverted. */ 119 #define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */ 120 #define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */ 121 #define PP_CMD_STB 0x01 /* Strobe. Inverted. */ 122 123 /* Parallel Port Command Register as implemented by PCP2x4. */ 124 #define INT_EN PP_CMD_IEN /* Interrupt enable. */ 125 #define STROBE PP_CMD_STB /* Command strobe. */ 126 127 /* The parallel port command register field (b1..b3) selects the 128 * various "registers" within the PC/P 2x4. These are the internal 129 * address of these "registers" that must be written to the parallel 130 * port command register. 131 */ 132 #define RXDATA0 (0 << 1) /* PCP RxData channel 0. */ 133 #define RXDATA1 (1 << 1) /* PCP RxData channel 1. */ 134 #define GEN_CTL (2 << 1) /* PCP General Control Register. */ 135 #define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */ 136 #define TXDATA0 (4 << 1) /* PCP TxData channel 0. */ 137 #define TXDATA1 (5 << 1) /* PCP TxData channel 1. */ 138 #define TXDATA2 (6 << 1) /* PCP TxData channel 2. */ 139 #define TXDATA3 (7 << 1) /* PCP TxData channel 3. */ 140 141 /* Parallel Port Status Register as implemented by PCP2x4. */ 142 #define ESTB PP_STAT_POUT /* Echoed strobe. */ 143 #define INT_REQ PP_STAT_ACK /* Input data int request. */ 144 #define BUSY PP_STAT_ERR /* Interface Busy. */ 145 146 /* Parallel Port Status Register BUSY and SELECT lines are multiplexed 147 * between several functions. Depending on which 2x4 "register" is 148 * currently selected (b1..b3), the BUSY and SELECT lines are 149 * assigned as follows: 150 * 151 * SELECT LINE: A3 A2 A1 152 * -------- 153 */ 154 #define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */ 155 // RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */ 156 #define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */ 157 // /* Reserved. 0 1 1 */ 158 #define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */ 159 // TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */ 160 // TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */ 161 // TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */ 162 163 /* BUSY LINE: A3 A2 A1 164 * -------- 165 */ 166 #define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */ 167 // RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */ 168 #define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */ 169 /* Reserved. 0 1 1 */ 170 #define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */ 171 #define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */ 172 #define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */ 173 #define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */ 174 175 #define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01 176 177 /********************************************************************* 178 * Hardware specific functions 179 *********************************************************************/ 180 static inline void portman_write_command(struct portman *pm, u8 value) 181 { 182 parport_write_control(pm->pardev->port, value); 183 } 184 185 static inline u8 portman_read_command(struct portman *pm) 186 { 187 return parport_read_control(pm->pardev->port); 188 } 189 190 static inline u8 portman_read_status(struct portman *pm) 191 { 192 return parport_read_status(pm->pardev->port); 193 } 194 195 static inline u8 portman_read_data(struct portman *pm) 196 { 197 return parport_read_data(pm->pardev->port); 198 } 199 200 static inline void portman_write_data(struct portman *pm, u8 value) 201 { 202 parport_write_data(pm->pardev->port, value); 203 } 204 205 static void portman_write_midi(struct portman *pm, 206 int port, u8 mididata) 207 { 208 int command = ((port + 4) << 1); 209 210 /* Get entering data byte and port number in BL and BH respectively. 211 * Set up Tx Channel address field for use with PP Cmd Register. 212 * Store address field in BH register. 213 * Inputs: AH = Output port number (0..3). 214 * AL = Data byte. 215 * command = TXDATA0 | INT_EN; 216 * Align port num with address field (b1...b3), 217 * set address for TXDatax, Strobe=0 218 */ 219 command |= INT_EN; 220 221 /* Disable interrupts so that the process is not interrupted, then 222 * write the address associated with the current Tx channel to the 223 * PP Command Reg. Do not set the Strobe signal yet. 224 */ 225 226 do { 227 portman_write_command(pm, command); 228 229 /* While the address lines settle, write parallel output data to 230 * PP Data Reg. This has no effect until Strobe signal is asserted. 231 */ 232 233 portman_write_data(pm, mididata); 234 235 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 236 * Status Register), then go write data. Else go back and wait. 237 */ 238 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY); 239 240 /* TxEmpty is set. Maintain PC/P destination address and assert 241 * Strobe through the PP Command Reg. This will Strobe data into 242 * the PC/P transmitter and set the PC/P BUSY signal. 243 */ 244 245 portman_write_command(pm, command | STROBE); 246 247 /* Wait for strobe line to settle and echo back through hardware. 248 * Once it has echoed back, assume that the address and data lines 249 * have settled! 250 */ 251 252 while ((portman_read_status(pm) & ESTB) == 0) 253 cpu_relax(); 254 255 /* Release strobe and immediately re-allow interrupts. */ 256 portman_write_command(pm, command); 257 258 while ((portman_read_status(pm) & ESTB) == ESTB) 259 cpu_relax(); 260 261 /* PC/P BUSY is now set. We must wait until BUSY resets itself. 262 * We'll reenable ints while we're waiting. 263 */ 264 265 while ((portman_read_status(pm) & BUSY) == BUSY) 266 cpu_relax(); 267 268 /* Data sent. */ 269 } 270 271 272 /* 273 * Read MIDI byte from port 274 * Attempt to read input byte from specified hardware input port (0..). 275 * Return -1 if no data 276 */ 277 static int portman_read_midi(struct portman *pm, int port) 278 { 279 unsigned char midi_data = 0; 280 unsigned char cmdout; /* Saved address+IE bit. */ 281 282 /* Make sure clocking edge is down before starting... */ 283 portman_write_data(pm, 0); /* Make sure edge is down. */ 284 285 /* Set destination address to PCP. */ 286 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */ 287 portman_write_command(pm, cmdout); 288 289 while ((portman_read_status(pm) & ESTB) == ESTB) 290 cpu_relax(); /* Wait for strobe echo. */ 291 292 /* After the address lines settle, check multiplexed RxAvail signal. 293 * If data is available, read it. 294 */ 295 if ((portman_read_status(pm) & RXAVAIL) == 0) 296 return -1; /* No data. */ 297 298 /* Set the Strobe signal to enable the Rx clocking circuitry. */ 299 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */ 300 301 while ((portman_read_status(pm) & ESTB) == 0) 302 cpu_relax(); /* Wait for strobe echo. */ 303 304 /* The first data bit (msb) is already sitting on the input line. */ 305 midi_data = (portman_read_status(pm) & 128); 306 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 307 308 /* Data bit 6. */ 309 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 310 midi_data |= (portman_read_status(pm) >> 1) & 64; 311 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 312 313 /* Data bit 5. */ 314 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 315 midi_data |= (portman_read_status(pm) >> 2) & 32; 316 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 317 318 /* Data bit 4. */ 319 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 320 midi_data |= (portman_read_status(pm) >> 3) & 16; 321 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 322 323 /* Data bit 3. */ 324 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 325 midi_data |= (portman_read_status(pm) >> 4) & 8; 326 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 327 328 /* Data bit 2. */ 329 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 330 midi_data |= (portman_read_status(pm) >> 5) & 4; 331 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 332 333 /* Data bit 1. */ 334 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 335 midi_data |= (portman_read_status(pm) >> 6) & 2; 336 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 337 338 /* Data bit 0. */ 339 portman_write_data(pm, 0); /* Cause falling edge while data settles. */ 340 midi_data |= (portman_read_status(pm) >> 7) & 1; 341 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */ 342 portman_write_data(pm, 0); /* Return data clock low. */ 343 344 345 /* De-assert Strobe and return data. */ 346 portman_write_command(pm, cmdout); /* Output saved address+IE. */ 347 348 /* Wait for strobe echo. */ 349 while ((portman_read_status(pm) & ESTB) == ESTB) 350 cpu_relax(); 351 352 return (midi_data & 255); /* Shift back and return value. */ 353 } 354 355 /* 356 * Checks if any input data on the given channel is available 357 * Checks RxAvail 358 */ 359 static int portman_data_avail(struct portman *pm, int channel) 360 { 361 int command = INT_EN; 362 switch (channel) { 363 case 0: 364 command |= RXDATA0; 365 break; 366 case 1: 367 command |= RXDATA1; 368 break; 369 } 370 /* Write hardware (assumme STROBE=0) */ 371 portman_write_command(pm, command); 372 /* Check multiplexed RxAvail signal */ 373 if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL) 374 return 1; /* Data available */ 375 376 /* No Data available */ 377 return 0; 378 } 379 380 381 /* 382 * Flushes any input 383 */ 384 static void portman_flush_input(struct portman *pm, unsigned char port) 385 { 386 /* Local variable for counting things */ 387 unsigned int i = 0; 388 unsigned char command = 0; 389 390 switch (port) { 391 case 0: 392 command = RXDATA0; 393 break; 394 case 1: 395 command = RXDATA1; 396 break; 397 default: 398 snd_printk(KERN_WARNING 399 "portman_flush_input() Won't flush port %i\n", 400 port); 401 return; 402 } 403 404 /* Set address for specified channel in port and allow to settle. */ 405 portman_write_command(pm, command); 406 407 /* Assert the Strobe and wait for echo back. */ 408 portman_write_command(pm, command | STROBE); 409 410 /* Wait for ESTB */ 411 while ((portman_read_status(pm) & ESTB) == 0) 412 cpu_relax(); 413 414 /* Output clock cycles to the Rx circuitry. */ 415 portman_write_data(pm, 0); 416 417 /* Flush 250 bits... */ 418 for (i = 0; i < 250; i++) { 419 portman_write_data(pm, 1); 420 portman_write_data(pm, 0); 421 } 422 423 /* Deassert the Strobe signal of the port and wait for it to settle. */ 424 portman_write_command(pm, command | INT_EN); 425 426 /* Wait for settling */ 427 while ((portman_read_status(pm) & ESTB) == ESTB) 428 cpu_relax(); 429 } 430 431 static int portman_probe(struct parport *p) 432 { 433 /* Initialize the parallel port data register. Will set Rx clocks 434 * low in case we happen to be addressing the Rx ports at this time. 435 */ 436 /* 1 */ 437 parport_write_data(p, 0); 438 439 /* Initialize the parallel port command register, thus initializing 440 * hardware handshake lines to midi box: 441 * 442 * Strobe = 0 443 * Interrupt Enable = 0 444 */ 445 /* 2 */ 446 parport_write_control(p, 0); 447 448 /* Check if Portman PC/P 2x4 is out there. */ 449 /* 3 */ 450 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */ 451 452 /* Check for ESTB to be clear */ 453 /* 4 */ 454 if ((parport_read_status(p) & ESTB) == ESTB) 455 return 1; /* CODE 1 - Strobe Failure. */ 456 457 /* Set for RXDATA0 where no damage will be done. */ 458 /* 5 */ 459 parport_write_control(p, RXDATA0 | STROBE); /* Write Strobe=1 to command reg. */ 460 461 /* 6 */ 462 if ((parport_read_status(p) & ESTB) != ESTB) 463 return 1; /* CODE 1 - Strobe Failure. */ 464 465 /* 7 */ 466 parport_write_control(p, 0); /* Reset Strobe=0. */ 467 468 /* Check if Tx circuitry is functioning properly. If initialized 469 * unit TxEmpty is false, send out char and see if it goes true. 470 */ 471 /* 8 */ 472 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */ 473 474 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP 475 * Status Register), then go write data. Else go back and wait. 476 */ 477 /* 9 */ 478 if ((parport_read_status(p) & TXEMPTY) == 0) 479 return 2; 480 481 /* Return OK status. */ 482 return 0; 483 } 484 485 static int portman_device_init(struct portman *pm) 486 { 487 portman_flush_input(pm, 0); 488 portman_flush_input(pm, 1); 489 490 return 0; 491 } 492 493 /********************************************************************* 494 * Rawmidi 495 *********************************************************************/ 496 static int snd_portman_midi_open(struct snd_rawmidi_substream *substream) 497 { 498 return 0; 499 } 500 501 static int snd_portman_midi_close(struct snd_rawmidi_substream *substream) 502 { 503 return 0; 504 } 505 506 static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream, 507 int up) 508 { 509 struct portman *pm = substream->rmidi->private_data; 510 unsigned long flags; 511 512 spin_lock_irqsave(&pm->reg_lock, flags); 513 if (up) 514 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED; 515 else 516 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED; 517 spin_unlock_irqrestore(&pm->reg_lock, flags); 518 } 519 520 static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream, 521 int up) 522 { 523 struct portman *pm = substream->rmidi->private_data; 524 unsigned long flags; 525 unsigned char byte; 526 527 spin_lock_irqsave(&pm->reg_lock, flags); 528 if (up) { 529 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1)) 530 portman_write_midi(pm, substream->number, byte); 531 } 532 spin_unlock_irqrestore(&pm->reg_lock, flags); 533 } 534 535 static const struct snd_rawmidi_ops snd_portman_midi_output = { 536 .open = snd_portman_midi_open, 537 .close = snd_portman_midi_close, 538 .trigger = snd_portman_midi_output_trigger, 539 }; 540 541 static const struct snd_rawmidi_ops snd_portman_midi_input = { 542 .open = snd_portman_midi_open, 543 .close = snd_portman_midi_close, 544 .trigger = snd_portman_midi_input_trigger, 545 }; 546 547 /* Create and initialize the rawmidi component */ 548 static int snd_portman_rawmidi_create(struct snd_card *card) 549 { 550 struct portman *pm = card->private_data; 551 struct snd_rawmidi *rmidi; 552 struct snd_rawmidi_substream *substream; 553 int err; 554 555 err = snd_rawmidi_new(card, CARD_NAME, 0, 556 PORTMAN_NUM_OUTPUT_PORTS, 557 PORTMAN_NUM_INPUT_PORTS, 558 &rmidi); 559 if (err < 0) 560 return err; 561 562 rmidi->private_data = pm; 563 strcpy(rmidi->name, CARD_NAME); 564 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT | 565 SNDRV_RAWMIDI_INFO_INPUT | 566 SNDRV_RAWMIDI_INFO_DUPLEX; 567 568 pm->rmidi = rmidi; 569 570 /* register rawmidi ops */ 571 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 572 &snd_portman_midi_output); 573 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 574 &snd_portman_midi_input); 575 576 /* name substreams */ 577 /* output */ 578 list_for_each_entry(substream, 579 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, 580 list) { 581 sprintf(substream->name, 582 "Portman2x4 %d", substream->number+1); 583 } 584 /* input */ 585 list_for_each_entry(substream, 586 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, 587 list) { 588 pm->midi_input[substream->number] = substream; 589 sprintf(substream->name, 590 "Portman2x4 %d", substream->number+1); 591 } 592 593 return err; 594 } 595 596 /********************************************************************* 597 * parport stuff 598 *********************************************************************/ 599 static void snd_portman_interrupt(void *userdata) 600 { 601 unsigned char midivalue = 0; 602 struct portman *pm = ((struct snd_card*)userdata)->private_data; 603 604 spin_lock(&pm->reg_lock); 605 606 /* While any input data is waiting */ 607 while ((portman_read_status(pm) & INT_REQ) == INT_REQ) { 608 /* If data available on channel 0, 609 read it and stuff it into the queue. */ 610 if (portman_data_avail(pm, 0)) { 611 /* Read Midi */ 612 midivalue = portman_read_midi(pm, 0); 613 /* put midi into queue... */ 614 if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 615 snd_rawmidi_receive(pm->midi_input[0], 616 &midivalue, 1); 617 618 } 619 /* If data available on channel 1, 620 read it and stuff it into the queue. */ 621 if (portman_data_avail(pm, 1)) { 622 /* Read Midi */ 623 midivalue = portman_read_midi(pm, 1); 624 /* put midi into queue... */ 625 if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED) 626 snd_rawmidi_receive(pm->midi_input[1], 627 &midivalue, 1); 628 } 629 630 } 631 632 spin_unlock(&pm->reg_lock); 633 } 634 635 static void snd_portman_attach(struct parport *p) 636 { 637 struct platform_device *device; 638 639 device = platform_device_alloc(PLATFORM_DRIVER, device_count); 640 if (!device) 641 return; 642 643 /* Temporary assignment to forward the parport */ 644 platform_set_drvdata(device, p); 645 646 if (platform_device_add(device) < 0) { 647 platform_device_put(device); 648 return; 649 } 650 651 /* Since we dont get the return value of probe 652 * We need to check if device probing succeeded or not */ 653 if (!platform_get_drvdata(device)) { 654 platform_device_unregister(device); 655 return; 656 } 657 658 /* register device in global table */ 659 platform_devices[device_count] = device; 660 device_count++; 661 } 662 663 static void snd_portman_detach(struct parport *p) 664 { 665 /* nothing to do here */ 666 } 667 668 static int snd_portman_dev_probe(struct pardevice *pardev) 669 { 670 if (strcmp(pardev->name, DRIVER_NAME)) 671 return -ENODEV; 672 673 return 0; 674 } 675 676 static struct parport_driver portman_parport_driver = { 677 .name = "portman2x4", 678 .probe = snd_portman_dev_probe, 679 .match_port = snd_portman_attach, 680 .detach = snd_portman_detach, 681 .devmodel = true, 682 }; 683 684 /********************************************************************* 685 * platform stuff 686 *********************************************************************/ 687 static void snd_portman_card_private_free(struct snd_card *card) 688 { 689 struct portman *pm = card->private_data; 690 struct pardevice *pardev = pm->pardev; 691 692 if (pardev) { 693 parport_release(pardev); 694 parport_unregister_device(pardev); 695 } 696 697 portman_free(pm); 698 } 699 700 static int snd_portman_probe(struct platform_device *pdev) 701 { 702 struct pardevice *pardev; 703 struct parport *p; 704 int dev = pdev->id; 705 struct snd_card *card = NULL; 706 struct portman *pm = NULL; 707 int err; 708 struct pardev_cb portman_cb = { 709 .preempt = NULL, 710 .wakeup = NULL, 711 .irq_func = snd_portman_interrupt, /* ISR */ 712 .flags = PARPORT_DEV_EXCL, /* flags */ 713 }; 714 715 p = platform_get_drvdata(pdev); 716 platform_set_drvdata(pdev, NULL); 717 718 if (dev >= SNDRV_CARDS) 719 return -ENODEV; 720 if (!enable[dev]) 721 return -ENOENT; 722 723 err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE, 724 0, &card); 725 if (err < 0) { 726 snd_printd("Cannot create card\n"); 727 return err; 728 } 729 strcpy(card->driver, DRIVER_NAME); 730 strcpy(card->shortname, CARD_NAME); 731 sprintf(card->longname, "%s at 0x%lx, irq %i", 732 card->shortname, p->base, p->irq); 733 734 portman_cb.private = card; /* private */ 735 pardev = parport_register_dev_model(p, /* port */ 736 DRIVER_NAME, /* name */ 737 &portman_cb, /* callbacks */ 738 pdev->id); /* device number */ 739 if (pardev == NULL) { 740 snd_printd("Cannot register pardevice\n"); 741 err = -EIO; 742 goto __err; 743 } 744 745 /* claim parport */ 746 if (parport_claim(pardev)) { 747 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base); 748 err = -EIO; 749 goto free_pardev; 750 } 751 752 err = portman_create(card, pardev, &pm); 753 if (err < 0) { 754 snd_printd("Cannot create main component\n"); 755 goto release_pardev; 756 } 757 card->private_data = pm; 758 card->private_free = snd_portman_card_private_free; 759 760 err = portman_probe(p); 761 if (err) { 762 err = -EIO; 763 goto __err; 764 } 765 766 err = snd_portman_rawmidi_create(card); 767 if (err < 0) { 768 snd_printd("Creating Rawmidi component failed\n"); 769 goto __err; 770 } 771 772 /* init device */ 773 err = portman_device_init(pm); 774 if (err < 0) 775 goto __err; 776 777 platform_set_drvdata(pdev, card); 778 779 /* At this point card will be usable */ 780 err = snd_card_register(card); 781 if (err < 0) { 782 snd_printd("Cannot register card\n"); 783 goto __err; 784 } 785 786 snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base); 787 return 0; 788 789 release_pardev: 790 parport_release(pardev); 791 free_pardev: 792 parport_unregister_device(pardev); 793 __err: 794 snd_card_free(card); 795 return err; 796 } 797 798 static int snd_portman_remove(struct platform_device *pdev) 799 { 800 struct snd_card *card = platform_get_drvdata(pdev); 801 802 if (card) 803 snd_card_free(card); 804 805 return 0; 806 } 807 808 809 static struct platform_driver snd_portman_driver = { 810 .probe = snd_portman_probe, 811 .remove = snd_portman_remove, 812 .driver = { 813 .name = PLATFORM_DRIVER, 814 } 815 }; 816 817 /********************************************************************* 818 * module init stuff 819 *********************************************************************/ 820 static void snd_portman_unregister_all(void) 821 { 822 int i; 823 824 for (i = 0; i < SNDRV_CARDS; ++i) { 825 if (platform_devices[i]) { 826 platform_device_unregister(platform_devices[i]); 827 platform_devices[i] = NULL; 828 } 829 } 830 platform_driver_unregister(&snd_portman_driver); 831 parport_unregister_driver(&portman_parport_driver); 832 } 833 834 static int __init snd_portman_module_init(void) 835 { 836 int err; 837 838 err = platform_driver_register(&snd_portman_driver); 839 if (err < 0) 840 return err; 841 842 if (parport_register_driver(&portman_parport_driver) != 0) { 843 platform_driver_unregister(&snd_portman_driver); 844 return -EIO; 845 } 846 847 if (device_count == 0) { 848 snd_portman_unregister_all(); 849 return -ENODEV; 850 } 851 852 return 0; 853 } 854 855 static void __exit snd_portman_module_exit(void) 856 { 857 snd_portman_unregister_all(); 858 } 859 860 module_init(snd_portman_module_init); 861 module_exit(snd_portman_module_exit); 862