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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux-block.git] / sound / drivers / portman2x4.c
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74ba9207 1// SPDX-License-Identifier: GPL-2.0-or-later
757e119b
MK		 2/*
3 * Driver for Midiman Portman2x4 parallel port midi interface
4 *
5 * Copyright (c) by Levent Guendogdu <levon@feature-it.com>
6 *
757e119b
MK		 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
757e119b
MK		 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>
5a0e3ad6 32#include <linux/slab.h>
da155d5b 33#include <linux/module.h>
757e119b
MK		 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;
a67ff6a5 45static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
757e119b
MK		 46
47static struct platform_device *platform_devices[SNDRV_CARDS];
48static int device_count;
49
6a73cf46 50module_param_array(index, int, NULL, 0444);
757e119b 51MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
6a73cf46 52module_param_array(id, charp, NULL, 0444);
757e119b 53MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
6a73cf46 54module_param_array(enable, bool, NULL, 0444);
757e119b
MK		 55MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
56
57MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig");
58MODULE_DESCRIPTION("Midiman Portman2x4");
59MODULE_LICENSE("GPL");
60MODULE_SUPPORTED_DEVICE("{{Midiman,Portman2x4}}");
61
62/*********************************************************************
63 * Chip specific
64 *********************************************************************/
65#define PORTMAN_NUM_INPUT_PORTS 2
66#define PORTMAN_NUM_OUTPUT_PORTS 4
67
68struct portman {
69 spinlock_t reg_lock;
70 struct snd_card *card;
71 struct snd_rawmidi *rmidi;
72 struct pardevice *pardev;
757e119b
MK		 73 int open_count;
74 int mode[PORTMAN_NUM_INPUT_PORTS];
75 struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS];
76};
77
78static int portman_free(struct portman *pm)
79{
80 kfree(pm);
81 return 0;
82}
83
fbbb01a1
BP		 84static int portman_create(struct snd_card *card,
85 struct pardevice *pardev,
86 struct portman **rchip)
757e119b
MK		 87{
88 struct portman *pm;
89
90 *rchip = NULL;
91
92 pm = kzalloc(sizeof(struct portman), GFP_KERNEL);
93 if (pm == NULL)
94 return -ENOMEM;
95
96 /* Init chip specific data */
97 spin_lock_init(&pm->reg_lock);
98 pm->card = card;
99 pm->pardev = pardev;
100
101 *rchip = pm;
102
103 return 0;
104}
105
106/*********************************************************************
107 * HW related constants
108 *********************************************************************/
109
110/* Standard PC parallel port status register equates. */
111#define PP_STAT_BSY 0x80 /* Busy status. Inverted. */
112#define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */
113#define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */
114#define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */
115#define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */
116
117/* Standard PC parallel port command register equates. */
118#define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */
119#define PP_CMD_SELI 0x08 /* Select Input. Inverted. */
120#define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */
121#define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */
122#define PP_CMD_STB 0x01 /* Strobe. Inverted. */
123
124/* Parallel Port Command Register as implemented by PCP2x4. */
125#define INT_EN PP_CMD_IEN /* Interrupt enable. */
126#define STROBE PP_CMD_STB /* Command strobe. */
127
128/* The parallel port command register field (b1..b3) selects the
129 * various "registers" within the PC/P 2x4. These are the internal
130 * address of these "registers" that must be written to the parallel
131 * port command register.
132 */
133#define RXDATA0 (0 << 1) /* PCP RxData channel 0. */
134#define RXDATA1 (1 << 1) /* PCP RxData channel 1. */
135#define GEN_CTL (2 << 1) /* PCP General Control Register. */
136#define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */
137#define TXDATA0 (4 << 1) /* PCP TxData channel 0. */
138#define TXDATA1 (5 << 1) /* PCP TxData channel 1. */
139#define TXDATA2 (6 << 1) /* PCP TxData channel 2. */
140#define TXDATA3 (7 << 1) /* PCP TxData channel 3. */
141
142/* Parallel Port Status Register as implemented by PCP2x4. */
143#define ESTB PP_STAT_POUT /* Echoed strobe. */
144#define INT_REQ PP_STAT_ACK /* Input data int request. */
145#define BUSY PP_STAT_ERR /* Interface Busy. */
146
147/* Parallel Port Status Register BUSY and SELECT lines are multiplexed
148 * between several functions. Depending on which 2x4 "register" is
149 * currently selected (b1..b3), the BUSY and SELECT lines are
150 * assigned as follows:
151 *
152 * SELECT LINE: A3 A2 A1
153 * --------
154 */
155#define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */
156// RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */
157#define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */
158// /* Reserved. 0 1 1 */
159#define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */
160// TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */
161// TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */
162// TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */
163
164/* BUSY LINE: A3 A2 A1
165 * --------
166 */
167#define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */
168// RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */
169#define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */
170 /* Reserved. 0 1 1 */
171#define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */
172#define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */
173#define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */
174#define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */
175
176#define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01
177
178/*********************************************************************
179 * Hardware specific functions
180 *********************************************************************/
181static inline void portman_write_command(struct portman *pm, u8 value)
182{
183 parport_write_control(pm->pardev->port, value);
184}
185
186static inline u8 portman_read_command(struct portman *pm)
187{
188 return parport_read_control(pm->pardev->port);
189}
190
191static inline u8 portman_read_status(struct portman *pm)
192{
193 return parport_read_status(pm->pardev->port);
194}
195
196static inline u8 portman_read_data(struct portman *pm)
197{
198 return parport_read_data(pm->pardev->port);
199}
200
201static inline void portman_write_data(struct portman *pm, u8 value)
202{
203 parport_write_data(pm->pardev->port, value);
204}
205
206static void portman_write_midi(struct portman *pm,
207 int port, u8 mididata)
208{
209 int command = ((port + 4) << 1);
210
211 /* Get entering data byte and port number in BL and BH respectively.
212 * Set up Tx Channel address field for use with PP Cmd Register.
213 * Store address field in BH register.
214 * Inputs: AH = Output port number (0..3).
215 * AL = Data byte.
216 * command = TXDATA0 | INT_EN;
217 * Align port num with address field (b1...b3),
218 * set address for TXDatax, Strobe=0
219 */
220 command |= INT_EN;
221
222 /* Disable interrupts so that the process is not interrupted, then
223 * write the address associated with the current Tx channel to the
224 * PP Command Reg. Do not set the Strobe signal yet.
225 */
226
227 do {
228 portman_write_command(pm, command);
229
230 /* While the address lines settle, write parallel output data to
231 * PP Data Reg. This has no effect until Strobe signal is asserted.
232 */
233
234 portman_write_data(pm, mididata);
235
236 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
237 * Status Register), then go write data. Else go back and wait.
238 */
239 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY);
240
241 /* TxEmpty is set. Maintain PC/P destination address and assert
242 * Strobe through the PP Command Reg. This will Strobe data into
243 * the PC/P transmitter and set the PC/P BUSY signal.
244 */
245
246 portman_write_command(pm, command | STROBE);
247
248 /* Wait for strobe line to settle and echo back through hardware.
249 * Once it has echoed back, assume that the address and data lines
250 * have settled!
251 */
252
253 while ((portman_read_status(pm) & ESTB) == 0)
254 cpu_relax();
255
256 /* Release strobe and immediately re-allow interrupts. */
257 portman_write_command(pm, command);
258
259 while ((portman_read_status(pm) & ESTB) == ESTB)
260 cpu_relax();
261
262 /* PC/P BUSY is now set. We must wait until BUSY resets itself.
263 * We'll reenable ints while we're waiting.
264 */
265
266 while ((portman_read_status(pm) & BUSY) == BUSY)
267 cpu_relax();
268
269 /* Data sent. */
270}
271
272
273/*
274 * Read MIDI byte from port
275 * Attempt to read input byte from specified hardware input port (0..).
276 * Return -1 if no data
277 */
278static int portman_read_midi(struct portman *pm, int port)
279{
280 unsigned char midi_data = 0;
281 unsigned char cmdout; /* Saved address+IE bit. */
282
283 /* Make sure clocking edge is down before starting... */
284 portman_write_data(pm, 0); /* Make sure edge is down. */
285
286 /* Set destination address to PCP. */
287 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */
288 portman_write_command(pm, cmdout);
289
290 while ((portman_read_status(pm) & ESTB) == ESTB)
291 cpu_relax(); /* Wait for strobe echo. */
292
293 /* After the address lines settle, check multiplexed RxAvail signal.
294 * If data is available, read it.
295 */
296 if ((portman_read_status(pm) & RXAVAIL) == 0)
297 return -1; /* No data. */
298
299 /* Set the Strobe signal to enable the Rx clocking circuitry. */
300 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */
301
302 while ((portman_read_status(pm) & ESTB) == 0)
303 cpu_relax(); /* Wait for strobe echo. */
304
305 /* The first data bit (msb) is already sitting on the input line. */
306 midi_data = (portman_read_status(pm) & 128);
307 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
308
309 /* Data bit 6. */
310 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
311 midi_data |= (portman_read_status(pm) >> 1) & 64;
312 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
313
314 /* Data bit 5. */
315 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
316 midi_data |= (portman_read_status(pm) >> 2) & 32;
317 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
318
319 /* Data bit 4. */
320 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
321 midi_data |= (portman_read_status(pm) >> 3) & 16;
322 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
323
324 /* Data bit 3. */
325 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
326 midi_data |= (portman_read_status(pm) >> 4) & 8;
327 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
328
329 /* Data bit 2. */
330 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
331 midi_data |= (portman_read_status(pm) >> 5) & 4;
332 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
333
334 /* Data bit 1. */
335 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
336 midi_data |= (portman_read_status(pm) >> 6) & 2;
337 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
338
339 /* Data bit 0. */
340 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
341 midi_data |= (portman_read_status(pm) >> 7) & 1;
342 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
343 portman_write_data(pm, 0); /* Return data clock low. */
344
345
346 /* De-assert Strobe and return data. */
347 portman_write_command(pm, cmdout); /* Output saved address+IE. */
348
349 /* Wait for strobe echo. */
350 while ((portman_read_status(pm) & ESTB) == ESTB)
351 cpu_relax();
352
353 return (midi_data & 255); /* Shift back and return value. */
354}
355
356/*
357 * Checks if any input data on the given channel is available
358 * Checks RxAvail
359 */
360static int portman_data_avail(struct portman *pm, int channel)
361{
362 int command = INT_EN;
363 switch (channel) {
364 case 0:
365 command |= RXDATA0;
366 break;
367 case 1:
368 command |= RXDATA1;
369 break;
370 }
371 /* Write hardware (assumme STROBE=0) */
372 portman_write_command(pm, command);
373 /* Check multiplexed RxAvail signal */
374 if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL)
375 return 1; /* Data available */
376
377 /* No Data available */
378 return 0;
379}
380
381
382/*
383 * Flushes any input
384 */
385static void portman_flush_input(struct portman *pm, unsigned char port)
386{
387 /* Local variable for counting things */
388 unsigned int i = 0;
389 unsigned char command = 0;
390
391 switch (port) {
392 case 0:
393 command = RXDATA0;
394 break;
395 case 1:
396 command = RXDATA1;
397 break;
398 default:
399 snd_printk(KERN_WARNING
400 "portman_flush_input() Won't flush port %i\n",
401 port);
402 return;
403 }
404
405 /* Set address for specified channel in port and allow to settle. */
406 portman_write_command(pm, command);
407
408 /* Assert the Strobe and wait for echo back. */
409 portman_write_command(pm, command | STROBE);
410
411 /* Wait for ESTB */
412 while ((portman_read_status(pm) & ESTB) == 0)
413 cpu_relax();
414
415 /* Output clock cycles to the Rx circuitry. */
416 portman_write_data(pm, 0);
417
418 /* Flush 250 bits... */
419 for (i = 0; i < 250; i++) {
420 portman_write_data(pm, 1);
421 portman_write_data(pm, 0);
422 }
423
424 /* Deassert the Strobe signal of the port and wait for it to settle. */
425 portman_write_command(pm, command | INT_EN);
426
427 /* Wait for settling */
428 while ((portman_read_status(pm) & ESTB) == ESTB)
429 cpu_relax();
430}
431
432static int portman_probe(struct parport *p)
433{
434 /* Initialize the parallel port data register. Will set Rx clocks
435 * low in case we happen to be addressing the Rx ports at this time.
436 */
437 /* 1 */
438 parport_write_data(p, 0);
439
440 /* Initialize the parallel port command register, thus initializing
441 * hardware handshake lines to midi box:
442 *
443 * Strobe = 0
444 * Interrupt Enable = 0
445 */
446 /* 2 */
447 parport_write_control(p, 0);
448
449 /* Check if Portman PC/P 2x4 is out there. */
450 /* 3 */
451 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */
452
453 /* Check for ESTB to be clear */
454 /* 4 */
455 if ((parport_read_status(p) & ESTB) == ESTB)
456 return 1; /* CODE 1 - Strobe Failure. */
457
458 /* Set for RXDATA0 where no damage will be done. */
459 /* 5 */
28a04aa3 460 parport_write_control(p, RXDATA0 | STROBE); /* Write Strobe=1 to command reg. */
757e119b
MK		 461
462 /* 6 */
463 if ((parport_read_status(p) & ESTB) != ESTB)
464 return 1; /* CODE 1 - Strobe Failure. */
465
466 /* 7 */
467 parport_write_control(p, 0); /* Reset Strobe=0. */
468
469 /* Check if Tx circuitry is functioning properly. If initialized
470 * unit TxEmpty is false, send out char and see if if goes true.
471 */
472 /* 8 */
473 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */
474
475 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
476 * Status Register), then go write data. Else go back and wait.
477 */
478 /* 9 */
479 if ((parport_read_status(p) & TXEMPTY) == 0)
480 return 2;
481
482 /* Return OK status. */
483 return 0;
484}
485
486static int portman_device_init(struct portman *pm)
487{
488 portman_flush_input(pm, 0);
489 portman_flush_input(pm, 1);
490
491 return 0;
492}
493
494/*********************************************************************
495 * Rawmidi
496 *********************************************************************/
497static int snd_portman_midi_open(struct snd_rawmidi_substream *substream)
498{
499 return 0;
500}
501
502static int snd_portman_midi_close(struct snd_rawmidi_substream *substream)
503{
504 return 0;
505}
506
507static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream,
508 int up)
509{
510 struct portman *pm = substream->rmidi->private_data;
511 unsigned long flags;
512
513 spin_lock_irqsave(&pm->reg_lock, flags);
514 if (up)
515 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED;
516 else
517 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED;
518 spin_unlock_irqrestore(&pm->reg_lock, flags);
519}
520
521static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream,
522 int up)
523{
524 struct portman *pm = substream->rmidi->private_data;
525 unsigned long flags;
526 unsigned char byte;
527
528 spin_lock_irqsave(&pm->reg_lock, flags);
529 if (up) {
530 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1))
531 portman_write_midi(pm, substream->number, byte);
532 }
533 spin_unlock_irqrestore(&pm->reg_lock, flags);
534}
535
c36f486d 536static const struct snd_rawmidi_ops snd_portman_midi_output = {
757e119b
MK		 537 .open = snd_portman_midi_open,
538 .close = snd_portman_midi_close,
539 .trigger = snd_portman_midi_output_trigger,
540};
541
c36f486d 542static const struct snd_rawmidi_ops snd_portman_midi_input = {
757e119b
MK		 543 .open = snd_portman_midi_open,
544 .close = snd_portman_midi_close,
545 .trigger = snd_portman_midi_input_trigger,
546};
547
548/* Create and initialize the rawmidi component */
fbbb01a1 549static int snd_portman_rawmidi_create(struct snd_card *card)
757e119b
MK		 550{
551 struct portman *pm = card->private_data;
552 struct snd_rawmidi *rmidi;
553 struct snd_rawmidi_substream *substream;
554 int err;
555
556 err = snd_rawmidi_new(card, CARD_NAME, 0,
557 PORTMAN_NUM_OUTPUT_PORTS,
558 PORTMAN_NUM_INPUT_PORTS,
559 &rmidi);
560 if (err < 0)
561 return err;
562
563 rmidi->private_data = pm;
564 strcpy(rmidi->name, CARD_NAME);
565 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
566 SNDRV_RAWMIDI_INFO_INPUT |
567 SNDRV_RAWMIDI_INFO_DUPLEX;
568
569 pm->rmidi = rmidi;
570
571 /* register rawmidi ops */
572 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
573 &snd_portman_midi_output);
574 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
575 &snd_portman_midi_input);
576
577 /* name substreams */
578 /* output */
579 list_for_each_entry(substream,
580 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
581 list) {
582 sprintf(substream->name,
583 "Portman2x4 %d", substream->number+1);
584 }
585 /* input */
586 list_for_each_entry(substream,
587 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
588 list) {
589 pm->midi_input[substream->number] = substream;
590 sprintf(substream->name,
591 "Portman2x4 %d", substream->number+1);
592 }
593
594 return err;
595}
596
597/*********************************************************************
598 * parport stuff
599 *********************************************************************/
5712cb3d 600static void snd_portman_interrupt(void *userdata)
757e119b
MK		 601{
602 unsigned char midivalue = 0;
603 struct portman *pm = ((struct snd_card*)userdata)->private_data;
604
605 spin_lock(&pm->reg_lock);
606
607 /* While any input data is waiting */
608 while ((portman_read_status(pm) & INT_REQ) == INT_REQ) {
609 /* If data available on channel 0,
610 read it and stuff it into the queue. */
611 if (portman_data_avail(pm, 0)) {
612 /* Read Midi */
613 midivalue = portman_read_midi(pm, 0);
614 /* put midi into queue... */
615 if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED)
616 snd_rawmidi_receive(pm->midi_input[0],
617 &midivalue, 1);
618
619 }
620 /* If data available on channel 1,
621 read it and stuff it into the queue. */
622 if (portman_data_avail(pm, 1)) {
623 /* Read Midi */
624 midivalue = portman_read_midi(pm, 1);
625 /* put midi into queue... */
626 if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED)
627 snd_rawmidi_receive(pm->midi_input[1],
628 &midivalue, 1);
629 }
630
631 }
632
633 spin_unlock(&pm->reg_lock);
634}
635
fbbb01a1 636static void snd_portman_attach(struct parport *p)
757e119b
MK		 637{
638 struct platform_device *device;
639
640 device = platform_device_alloc(PLATFORM_DRIVER, device_count);
479ef436 641 if (!device)
757e119b
MK		 642 return;
643
644 /* Temporary assignment to forward the parport */
645 platform_set_drvdata(device, p);
646
479ef436 647 if (platform_device_add(device) < 0) {
757e119b
MK		 648 platform_device_put(device);
649 return;
650 }
651
652 /* Since we dont get the return value of probe
653 * We need to check if device probing succeeded or not */
654 if (!platform_get_drvdata(device)) {
655 platform_device_unregister(device);
656 return;
657 }
658
659 /* register device in global table */
660 platform_devices[device_count] = device;
661 device_count++;
662}
663
664static void snd_portman_detach(struct parport *p)
665{
666 /* nothing to do here */
667}
668
e6a1b7e8
SM		 669static int snd_portman_dev_probe(struct pardevice *pardev)
670{
671 if (strcmp(pardev->name, DRIVER_NAME))
672 return -ENODEV;
673
674 return 0;
675}
676
757e119b 677static struct parport_driver portman_parport_driver = {
e6a1b7e8
SM		 678 .name = "portman2x4",
679 .probe = snd_portman_dev_probe,
680 .match_port = snd_portman_attach,
681 .detach = snd_portman_detach,
682 .devmodel = true,
757e119b
MK		 683};
684
685/*********************************************************************
686 * platform stuff
687 *********************************************************************/
688static void snd_portman_card_private_free(struct snd_card *card)
689{
690 struct portman *pm = card->private_data;
691 struct pardevice *pardev = pm->pardev;
692
693 if (pardev) {
e6a1b7e8 694 parport_release(pardev);
757e119b
MK		 695 parport_unregister_device(pardev);
696 }
697
698 portman_free(pm);
699}
700
fbbb01a1 701static int snd_portman_probe(struct platform_device *pdev)
757e119b
MK		 702{
703 struct pardevice *pardev;
704 struct parport *p;
705 int dev = pdev->id;
706 struct snd_card *card = NULL;
707 struct portman *pm = NULL;
708 int err;
e6a1b7e8
SM		 709 struct pardev_cb portman_cb = {
710 .preempt = NULL,
711 .wakeup = NULL,
712 .irq_func = snd_portman_interrupt, /* ISR */
713 .flags = PARPORT_DEV_EXCL, /* flags */
714 };
757e119b
MK		 715
716 p = platform_get_drvdata(pdev);
717 platform_set_drvdata(pdev, NULL);
718
719 if (dev >= SNDRV_CARDS)
720 return -ENODEV;
721 if (!enable[dev])
722 return -ENOENT;
723
5872f3f6
TI		 724 err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,
725 0, &card);
bd7dd77c 726 if (err < 0) {
757e119b 727 snd_printd("Cannot create card\n");
bd7dd77c 728 return err;
757e119b
MK		 729 }
730 strcpy(card->driver, DRIVER_NAME);
731 strcpy(card->shortname, CARD_NAME);
732 sprintf(card->longname, "%s at 0x%lx, irq %i",
733 card->shortname, p->base, p->irq);
734
e6a1b7e8
SM		 735 portman_cb.private = card; /* private */
736 pardev = parport_register_dev_model(p, /* port */
737 DRIVER_NAME, /* name */
738 &portman_cb, /* callbacks */
739 pdev->id); /* device number */
757e119b
MK		 740 if (pardev == NULL) {
741 snd_printd("Cannot register pardevice\n");
742 err = -EIO;
743 goto __err;
744 }
745
e6a1b7e8
SM		 746 /* claim parport */
747 if (parport_claim(pardev)) {
748 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
749 err = -EIO;
750 goto free_pardev;
751 }
e6a1b7e8 752
757e119b
MK		 753 if ((err = portman_create(card, pardev, &pm)) < 0) {
754 snd_printd("Cannot create main component\n");
e6a1b7e8 755 goto release_pardev;
757e119b
MK		 756 }
757 card->private_data = pm;
758 card->private_free = snd_portman_card_private_free;
03367bf7
SM		 759
760 err = portman_probe(p);
761 if (err) {
762 err = -EIO;
763 goto __err;
764 }
757e119b
MK		 765
766 if ((err = snd_portman_rawmidi_create(card)) < 0) {
767 snd_printd("Creating Rawmidi component failed\n");
768 goto __err;
769 }
770
757e119b
MK		 771 /* init device */
772 if ((err = portman_device_init(pm)) < 0)
773 goto __err;
774
775 platform_set_drvdata(pdev, card);
776
777 /* At this point card will be usable */
778 if ((err = snd_card_register(card)) < 0) {
779 snd_printd("Cannot register card\n");
780 goto __err;
781 }
782
783 snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base);
784 return 0;
785
e6a1b7e8
SM		 786release_pardev:
787 parport_release(pardev);
788free_pardev:
789 parport_unregister_device(pardev);
757e119b
MK		 790__err:
791 snd_card_free(card);
792 return err;
793}
794
fbbb01a1 795static int snd_portman_remove(struct platform_device *pdev)
757e119b
MK		 796{
797 struct snd_card *card = platform_get_drvdata(pdev);
798
799 if (card)
800 snd_card_free(card);
801
802 return 0;
803}
804
805
806static struct platform_driver snd_portman_driver = {
807 .probe = snd_portman_probe,
fbbb01a1 808 .remove = snd_portman_remove,
757e119b 809 .driver = {
8bf01d8a 810 .name = PLATFORM_DRIVER,
757e119b
MK		 811 }
812};
813
814/*********************************************************************
815 * module init stuff
816 *********************************************************************/
3c2b576d 817static void snd_portman_unregister_all(void)
757e119b
MK		 818{
819 int i;
820
821 for (i = 0; i < SNDRV_CARDS; ++i) {
822 if (platform_devices[i]) {
823 platform_device_unregister(platform_devices[i]);
824 platform_devices[i] = NULL;
825 }
826 }
827 platform_driver_unregister(&snd_portman_driver);
828 parport_unregister_driver(&portman_parport_driver);
829}
830
831static int __init snd_portman_module_init(void)
832{
833 int err;
834
835 if ((err = platform_driver_register(&snd_portman_driver)) < 0)
836 return err;
837
838 if (parport_register_driver(&portman_parport_driver) != 0) {
839 platform_driver_unregister(&snd_portman_driver);
840 return -EIO;
841 }
842
843 if (device_count == 0) {
844 snd_portman_unregister_all();
845 return -ENODEV;
846 }
847
848 return 0;
849}
850
851static void __exit snd_portman_module_exit(void)
852{
853 snd_portman_unregister_all();
854}
855
856module_init(snd_portman_module_init);
857module_exit(snd_portman_module_exit);
Linux 6.x block layer and io_uring tree(s)