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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Driver for Midiman Portman2x4 parallel port midi interface4 *5 * Copyright (c) by Levent Guendogdu <levon@feature-it.com>6 *7 * ChangeLog8 * Jan 24 2007 Matthias Koenig <mkoenig@suse.de>9 * - cleanup and rewrite10 * Sep 30 2004 Tobias Gehrig <tobias@gehrig.tk>11 * - source code cleanup12 * 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 to15 * MODULE_SUPPORTED_DEVICE)16 * Mar 24 2004 Tobias Gehrig <tobias@gehrig.tk>17 * - added 2.6 kernel support18 * Mar 18 2004 Tobias Gehrig <tobias@gehrig.tk>19 * - added parport_unregister_driver to the startup routine if the driver fails to detect a portman20 * - added support for all 4 output ports in portman_putmidi21 * Mar 17 2004 Tobias Gehrig <tobias@gehrig.tk>22 * - added checks for opened input device in interrupt handler23 * Feb 20 2004 Tobias Gehrig <tobias@gehrig.tk>24 * - ported from alsa 0.5 to 1.025 */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 43static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;44static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;45static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;46 47static struct platform_device *platform_devices[SNDRV_CARDS]; 48static int device_count;49 50module_param_array(index, int, NULL, 0444);51MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");52module_param_array(id, charp, NULL, 0444);53MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");54module_param_array(enable, bool, NULL, 0444);55MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");56 57MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig");58MODULE_DESCRIPTION("Midiman Portman2x4");59MODULE_LICENSE("GPL");60 61/*********************************************************************62 * Chip specific63 *********************************************************************/64#define PORTMAN_NUM_INPUT_PORTS 265#define PORTMAN_NUM_OUTPUT_PORTS 466 67struct 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 77static int portman_free(struct portman *pm)78{79 kfree(pm);80 return 0;81}82 83static 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 constants107 *********************************************************************/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 internal129 * address of these "registers" that must be written to the parallel130 * 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 multiplexed147 * between several functions. Depending on which 2x4 "register" is148 * currently selected (b1..b3), the BUSY and SELECT lines are149 * assigned as follows:150 *151 * SELECT LINE: A3 A2 A1152 * --------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 A1164 * --------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 0x01176 177/*********************************************************************178 * Hardware specific functions179 *********************************************************************/180static inline void portman_write_command(struct portman *pm, u8 value)181{182 parport_write_control(pm->pardev->port, value);183}184 185static inline u8 portman_read_status(struct portman *pm)186{187 return parport_read_status(pm->pardev->port);188}189 190static inline void portman_write_data(struct portman *pm, u8 value)191{192 parport_write_data(pm->pardev->port, value);193}194 195static void portman_write_midi(struct portman *pm, 196 int port, u8 mididata)197{198 int command = ((port + 4) << 1);199 200 /* Get entering data byte and port number in BL and BH respectively.201 * Set up Tx Channel address field for use with PP Cmd Register.202 * Store address field in BH register.203 * Inputs: AH = Output port number (0..3).204 * AL = Data byte.205 * command = TXDATA0 | INT_EN;206 * Align port num with address field (b1...b3),207 * set address for TXDatax, Strobe=0208 */209 command |= INT_EN;210 211 /* Disable interrupts so that the process is not interrupted, then 212 * write the address associated with the current Tx channel to the 213 * PP Command Reg. Do not set the Strobe signal yet.214 */215 216 do {217 portman_write_command(pm, command);218 219 /* While the address lines settle, write parallel output data to 220 * PP Data Reg. This has no effect until Strobe signal is asserted.221 */222 223 portman_write_data(pm, mididata);224 225 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP226 * Status Register), then go write data. Else go back and wait.227 */228 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY);229 230 /* TxEmpty is set. Maintain PC/P destination address and assert231 * Strobe through the PP Command Reg. This will Strobe data into232 * the PC/P transmitter and set the PC/P BUSY signal.233 */234 235 portman_write_command(pm, command | STROBE);236 237 /* Wait for strobe line to settle and echo back through hardware.238 * Once it has echoed back, assume that the address and data lines239 * have settled!240 */241 242 while ((portman_read_status(pm) & ESTB) == 0)243 cpu_relax();244 245 /* Release strobe and immediately re-allow interrupts. */246 portman_write_command(pm, command);247 248 while ((portman_read_status(pm) & ESTB) == ESTB)249 cpu_relax();250 251 /* PC/P BUSY is now set. We must wait until BUSY resets itself.252 * We'll reenable ints while we're waiting.253 */254 255 while ((portman_read_status(pm) & BUSY) == BUSY)256 cpu_relax();257 258 /* Data sent. */259}260 261 262/*263 * Read MIDI byte from port264 * Attempt to read input byte from specified hardware input port (0..).265 * Return -1 if no data266 */267static int portman_read_midi(struct portman *pm, int port)268{269 unsigned char midi_data = 0;270 unsigned char cmdout; /* Saved address+IE bit. */271 272 /* Make sure clocking edge is down before starting... */273 portman_write_data(pm, 0); /* Make sure edge is down. */274 275 /* Set destination address to PCP. */276 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */277 portman_write_command(pm, cmdout);278 279 while ((portman_read_status(pm) & ESTB) == ESTB)280 cpu_relax(); /* Wait for strobe echo. */281 282 /* After the address lines settle, check multiplexed RxAvail signal.283 * If data is available, read it.284 */285 if ((portman_read_status(pm) & RXAVAIL) == 0)286 return -1; /* No data. */287 288 /* Set the Strobe signal to enable the Rx clocking circuitry. */289 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */290 291 while ((portman_read_status(pm) & ESTB) == 0)292 cpu_relax(); /* Wait for strobe echo. */293 294 /* The first data bit (msb) is already sitting on the input line. */295 midi_data = (portman_read_status(pm) & 128);296 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */297 298 /* Data bit 6. */299 portman_write_data(pm, 0); /* Cause falling edge while data settles. */300 midi_data |= (portman_read_status(pm) >> 1) & 64;301 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */302 303 /* Data bit 5. */304 portman_write_data(pm, 0); /* Cause falling edge while data settles. */305 midi_data |= (portman_read_status(pm) >> 2) & 32;306 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */307 308 /* Data bit 4. */309 portman_write_data(pm, 0); /* Cause falling edge while data settles. */310 midi_data |= (portman_read_status(pm) >> 3) & 16;311 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */312 313 /* Data bit 3. */314 portman_write_data(pm, 0); /* Cause falling edge while data settles. */315 midi_data |= (portman_read_status(pm) >> 4) & 8;316 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */317 318 /* Data bit 2. */319 portman_write_data(pm, 0); /* Cause falling edge while data settles. */320 midi_data |= (portman_read_status(pm) >> 5) & 4;321 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */322 323 /* Data bit 1. */324 portman_write_data(pm, 0); /* Cause falling edge while data settles. */325 midi_data |= (portman_read_status(pm) >> 6) & 2;326 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */327 328 /* Data bit 0. */329 portman_write_data(pm, 0); /* Cause falling edge while data settles. */330 midi_data |= (portman_read_status(pm) >> 7) & 1;331 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */332 portman_write_data(pm, 0); /* Return data clock low. */333 334 335 /* De-assert Strobe and return data. */336 portman_write_command(pm, cmdout); /* Output saved address+IE. */337 338 /* Wait for strobe echo. */339 while ((portman_read_status(pm) & ESTB) == ESTB)340 cpu_relax();341 342 return (midi_data & 255); /* Shift back and return value. */343}344 345/*346 * Checks if any input data on the given channel is available347 * Checks RxAvail 348 */349static int portman_data_avail(struct portman *pm, int channel)350{351 int command = INT_EN;352 switch (channel) {353 case 0:354 command |= RXDATA0;355 break;356 case 1:357 command |= RXDATA1;358 break;359 }360 /* Write hardware (assumme STROBE=0) */361 portman_write_command(pm, command);362 /* Check multiplexed RxAvail signal */363 if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL)364 return 1; /* Data available */365 366 /* No Data available */367 return 0;368}369 370 371/*372 * Flushes any input373 */374static void portman_flush_input(struct portman *pm, unsigned char port)375{376 /* Local variable for counting things */377 unsigned int i = 0;378 unsigned char command = 0;379 380 switch (port) {381 case 0:382 command = RXDATA0;383 break;384 case 1:385 command = RXDATA1;386 break;387 default:388 dev_warn(pm->card->dev, "%s Won't flush port %i\n",389 __func__, port);390 return;391 }392 393 /* Set address for specified channel in port and allow to settle. */394 portman_write_command(pm, command);395 396 /* Assert the Strobe and wait for echo back. */397 portman_write_command(pm, command | STROBE);398 399 /* Wait for ESTB */400 while ((portman_read_status(pm) & ESTB) == 0)401 cpu_relax();402 403 /* Output clock cycles to the Rx circuitry. */404 portman_write_data(pm, 0);405 406 /* Flush 250 bits... */407 for (i = 0; i < 250; i++) {408 portman_write_data(pm, 1);409 portman_write_data(pm, 0);410 }411 412 /* Deassert the Strobe signal of the port and wait for it to settle. */413 portman_write_command(pm, command | INT_EN);414 415 /* Wait for settling */416 while ((portman_read_status(pm) & ESTB) == ESTB)417 cpu_relax();418}419 420static int portman_probe(struct parport *p)421{422 /* Initialize the parallel port data register. Will set Rx clocks423 * low in case we happen to be addressing the Rx ports at this time.424 */425 /* 1 */426 parport_write_data(p, 0);427 428 /* Initialize the parallel port command register, thus initializing429 * hardware handshake lines to midi box:430 *431 * Strobe = 0432 * Interrupt Enable = 0 433 */434 /* 2 */435 parport_write_control(p, 0);436 437 /* Check if Portman PC/P 2x4 is out there. */438 /* 3 */439 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */440 441 /* Check for ESTB to be clear */442 /* 4 */443 if ((parport_read_status(p) & ESTB) == ESTB)444 return 1; /* CODE 1 - Strobe Failure. */445 446 /* Set for RXDATA0 where no damage will be done. */447 /* 5 */448 parport_write_control(p, RXDATA0 | STROBE); /* Write Strobe=1 to command reg. */449 450 /* 6 */451 if ((parport_read_status(p) & ESTB) != ESTB)452 return 1; /* CODE 1 - Strobe Failure. */453 454 /* 7 */455 parport_write_control(p, 0); /* Reset Strobe=0. */456 457 /* Check if Tx circuitry is functioning properly. If initialized 458 * unit TxEmpty is false, send out char and see if it goes true.459 */460 /* 8 */461 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */462 463 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP464 * Status Register), then go write data. Else go back and wait.465 */466 /* 9 */467 if ((parport_read_status(p) & TXEMPTY) == 0)468 return 2;469 470 /* Return OK status. */471 return 0;472}473 474static int portman_device_init(struct portman *pm)475{476 portman_flush_input(pm, 0);477 portman_flush_input(pm, 1);478 479 return 0;480}481 482/*********************************************************************483 * Rawmidi484 *********************************************************************/485static int snd_portman_midi_open(struct snd_rawmidi_substream *substream)486{487 return 0;488}489 490static int snd_portman_midi_close(struct snd_rawmidi_substream *substream)491{492 return 0;493}494 495static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream,496 int up)497{498 struct portman *pm = substream->rmidi->private_data;499 unsigned long flags;500 501 spin_lock_irqsave(&pm->reg_lock, flags);502 if (up)503 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED;504 else505 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED;506 spin_unlock_irqrestore(&pm->reg_lock, flags);507}508 509static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream,510 int up)511{512 struct portman *pm = substream->rmidi->private_data;513 unsigned long flags;514 unsigned char byte;515 516 spin_lock_irqsave(&pm->reg_lock, flags);517 if (up) {518 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1))519 portman_write_midi(pm, substream->number, byte);520 }521 spin_unlock_irqrestore(&pm->reg_lock, flags);522}523 524static const struct snd_rawmidi_ops snd_portman_midi_output = {525 .open = snd_portman_midi_open,526 .close = snd_portman_midi_close,527 .trigger = snd_portman_midi_output_trigger,528};529 530static const struct snd_rawmidi_ops snd_portman_midi_input = {531 .open = snd_portman_midi_open,532 .close = snd_portman_midi_close,533 .trigger = snd_portman_midi_input_trigger,534};535 536/* Create and initialize the rawmidi component */537static int snd_portman_rawmidi_create(struct snd_card *card)538{539 struct portman *pm = card->private_data;540 struct snd_rawmidi *rmidi;541 struct snd_rawmidi_substream *substream;542 int err;543 544 err = snd_rawmidi_new(card, CARD_NAME, 0, 545 PORTMAN_NUM_OUTPUT_PORTS, 546 PORTMAN_NUM_INPUT_PORTS, 547 &rmidi);548 if (err < 0) 549 return err;550 551 rmidi->private_data = pm;552 strcpy(rmidi->name, CARD_NAME);553 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |554 SNDRV_RAWMIDI_INFO_INPUT |555 SNDRV_RAWMIDI_INFO_DUPLEX;556 557 pm->rmidi = rmidi;558 559 /* register rawmidi ops */560 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, 561 &snd_portman_midi_output);562 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, 563 &snd_portman_midi_input);564 565 /* name substreams */566 /* output */567 list_for_each_entry(substream,568 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,569 list) {570 sprintf(substream->name,571 "Portman2x4 %d", substream->number+1);572 }573 /* input */574 list_for_each_entry(substream,575 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,576 list) {577 pm->midi_input[substream->number] = substream;578 sprintf(substream->name,579 "Portman2x4 %d", substream->number+1);580 }581 582 return err;583}584 585/*********************************************************************586 * parport stuff587 *********************************************************************/588static void snd_portman_interrupt(void *userdata)589{590 unsigned char midivalue = 0;591 struct portman *pm = ((struct snd_card*)userdata)->private_data;592 593 spin_lock(&pm->reg_lock);594 595 /* While any input data is waiting */596 while ((portman_read_status(pm) & INT_REQ) == INT_REQ) {597 /* If data available on channel 0, 598 read it and stuff it into the queue. */599 if (portman_data_avail(pm, 0)) {600 /* Read Midi */601 midivalue = portman_read_midi(pm, 0);602 /* put midi into queue... */603 if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED)604 snd_rawmidi_receive(pm->midi_input[0],605 &midivalue, 1);606 607 }608 /* If data available on channel 1, 609 read it and stuff it into the queue. */610 if (portman_data_avail(pm, 1)) {611 /* Read Midi */612 midivalue = portman_read_midi(pm, 1);613 /* put midi into queue... */614 if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED)615 snd_rawmidi_receive(pm->midi_input[1],616 &midivalue, 1);617 }618 619 }620 621 spin_unlock(&pm->reg_lock);622}623 624static void snd_portman_attach(struct parport *p)625{626 struct platform_device *device;627 628 device = platform_device_alloc(PLATFORM_DRIVER, device_count);629 if (!device)630 return;631 632 /* Temporary assignment to forward the parport */633 platform_set_drvdata(device, p);634 635 if (platform_device_add(device) < 0) {636 platform_device_put(device);637 return;638 }639 640 /* Since we dont get the return value of probe641 * We need to check if device probing succeeded or not */642 if (!platform_get_drvdata(device)) {643 platform_device_unregister(device);644 return;645 }646 647 /* register device in global table */648 platform_devices[device_count] = device;649 device_count++;650}651 652static void snd_portman_detach(struct parport *p)653{654 /* nothing to do here */655}656 657static int snd_portman_dev_probe(struct pardevice *pardev)658{659 if (strcmp(pardev->name, DRIVER_NAME))660 return -ENODEV;661 662 return 0;663}664 665static struct parport_driver portman_parport_driver = {666 .name = "portman2x4",667 .probe = snd_portman_dev_probe,668 .match_port = snd_portman_attach,669 .detach = snd_portman_detach,670};671 672/*********************************************************************673 * platform stuff674 *********************************************************************/675static void snd_portman_card_private_free(struct snd_card *card)676{677 struct portman *pm = card->private_data;678 struct pardevice *pardev = pm->pardev;679 680 if (pardev) {681 parport_release(pardev);682 parport_unregister_device(pardev);683 }684 685 portman_free(pm);686}687 688static int snd_portman_probe(struct platform_device *pdev)689{690 struct pardevice *pardev;691 struct parport *p;692 int dev = pdev->id;693 struct snd_card *card = NULL;694 struct portman *pm = NULL;695 int err;696 struct pardev_cb portman_cb = {697 .preempt = NULL,698 .wakeup = NULL,699 .irq_func = snd_portman_interrupt, /* ISR */700 .flags = PARPORT_DEV_EXCL, /* flags */701 };702 703 p = platform_get_drvdata(pdev);704 platform_set_drvdata(pdev, NULL);705 706 if (dev >= SNDRV_CARDS)707 return -ENODEV;708 if (!enable[dev]) 709 return -ENOENT;710 711 err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,712 0, &card);713 if (err < 0) {714 dev_dbg(&pdev->dev, "Cannot create card\n");715 return err;716 }717 strcpy(card->driver, DRIVER_NAME);718 strcpy(card->shortname, CARD_NAME);719 sprintf(card->longname, "%s at 0x%lx, irq %i", 720 card->shortname, p->base, p->irq);721 722 portman_cb.private = card; /* private */723 pardev = parport_register_dev_model(p, /* port */724 DRIVER_NAME, /* name */725 &portman_cb, /* callbacks */726 pdev->id); /* device number */727 if (pardev == NULL) {728 dev_dbg(card->dev, "Cannot register pardevice\n");729 err = -EIO;730 goto __err;731 }732 733 /* claim parport */734 if (parport_claim(pardev)) {735 dev_dbg(card->dev, "Cannot claim parport 0x%lx\n", pardev->port->base);736 err = -EIO;737 goto free_pardev;738 }739 740 err = portman_create(card, pardev, &pm);741 if (err < 0) {742 dev_dbg(card->dev, "Cannot create main component\n");743 goto release_pardev;744 }745 card->private_data = pm;746 card->private_free = snd_portman_card_private_free;747 748 err = portman_probe(p);749 if (err) {750 err = -EIO;751 goto __err;752 }753 754 err = snd_portman_rawmidi_create(card);755 if (err < 0) {756 dev_dbg(card->dev, "Creating Rawmidi component failed\n");757 goto __err;758 }759 760 /* init device */761 err = portman_device_init(pm);762 if (err < 0)763 goto __err;764 765 platform_set_drvdata(pdev, card);766 767 /* At this point card will be usable */768 err = snd_card_register(card);769 if (err < 0) {770 dev_dbg(card->dev, "Cannot register card\n");771 goto __err;772 }773 774 dev_info(card->dev, "Portman 2x4 on 0x%lx\n", p->base);775 return 0;776 777release_pardev:778 parport_release(pardev);779free_pardev:780 parport_unregister_device(pardev);781__err:782 snd_card_free(card);783 return err;784}785 786static void snd_portman_remove(struct platform_device *pdev)787{788 struct snd_card *card = platform_get_drvdata(pdev);789 790 if (card)791 snd_card_free(card);792}793 794 795static struct platform_driver snd_portman_driver = {796 .probe = snd_portman_probe,797 .remove_new = snd_portman_remove,798 .driver = {799 .name = PLATFORM_DRIVER,800 }801};802 803/*********************************************************************804 * module init stuff805 *********************************************************************/806static void snd_portman_unregister_all(void)807{808 int i;809 810 for (i = 0; i < SNDRV_CARDS; ++i) {811 if (platform_devices[i]) {812 platform_device_unregister(platform_devices[i]);813 platform_devices[i] = NULL;814 }815 } 816 platform_driver_unregister(&snd_portman_driver);817 parport_unregister_driver(&portman_parport_driver);818}819 820static int __init snd_portman_module_init(void)821{822 int err;823 824 err = platform_driver_register(&snd_portman_driver);825 if (err < 0)826 return err;827 828 if (parport_register_driver(&portman_parport_driver) != 0) {829 platform_driver_unregister(&snd_portman_driver);830 return -EIO;831 }832 833 if (device_count == 0) {834 snd_portman_unregister_all();835 return -ENODEV;836 }837 838 return 0;839}840 841static void __exit snd_portman_module_exit(void)842{843 snd_portman_unregister_all();844}845 846module_init(snd_portman_module_init);847module_exit(snd_portman_module_exit);848