xref: /openbmc/linux/sound/drivers/mtpav.c (revision cb981d5c)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *      MOTU Midi Timepiece ALSA Main routines
4  *      Copyright by Michael T. Mayers (c) Jan 09, 2000
5  *      mail: michael@tweakoz.com
6  *      Thanks to John Galbraith
7  *
8  *      This driver is for the 'Mark Of The Unicorn' (MOTU)
9  *      MidiTimePiece AV multiport MIDI interface
10  *
11  *      IOPORTS
12  *      -------
13  *      8 MIDI Ins and 8 MIDI outs
14  *      Video Sync In (BNC), Word Sync Out (BNC),
15  *      ADAT Sync Out (DB9)
16  *      SMPTE in/out (1/4")
17  *      2 programmable pedal/footswitch inputs and 4 programmable MIDI controller knobs.
18  *      Macintosh RS422 serial port
19  *      RS422 "network" port for ganging multiple MTP's
20  *      PC Parallel Port ( which this driver currently uses )
21  *
22  *      MISC FEATURES
23  *      -------------
24  *      Hardware MIDI routing, merging, and filtering
25  *      MIDI Synchronization to Video, ADAT, SMPTE and other Clock sources
26  *      128 'scene' memories, recallable from MIDI program change
27  *
28  * ChangeLog
29  * Jun 11 2001	Takashi Iwai <tiwai@suse.de>
30  *      - Recoded & debugged
31  *      - Added timer interrupt for midi outputs
32  *      - hwports is between 1 and 8, which specifies the number of hardware ports.
33  *        The three global ports, computer, adat and broadcast ports, are created
34  *        always after h/w and remote ports.
35  */
36 
37 #include <linux/init.h>
38 #include <linux/interrupt.h>
39 #include <linux/module.h>
40 #include <linux/err.h>
41 #include <linux/platform_device.h>
42 #include <linux/ioport.h>
43 #include <linux/io.h>
44 #include <linux/moduleparam.h>
45 #include <sound/core.h>
46 #include <sound/initval.h>
47 #include <sound/rawmidi.h>
48 #include <linux/delay.h>
49 
50 /*
51  *      globals
52  */
53 MODULE_AUTHOR("Michael T. Mayers");
54 MODULE_DESCRIPTION("MOTU MidiTimePiece AV multiport MIDI");
55 MODULE_LICENSE("GPL");
56 
57 // io resources
58 #define MTPAV_IOBASE		0x378
59 #define MTPAV_IRQ		7
60 #define MTPAV_MAX_PORTS		8
61 
62 static int index = SNDRV_DEFAULT_IDX1;
63 static char *id = SNDRV_DEFAULT_STR1;
64 static long port = MTPAV_IOBASE;	/* 0x378, 0x278 */
65 static int irq = MTPAV_IRQ;		/* 7, 5 */
66 static int hwports = MTPAV_MAX_PORTS;	/* use hardware ports 1-8 */
67 
68 module_param(index, int, 0444);
69 MODULE_PARM_DESC(index, "Index value for MotuMTPAV MIDI.");
70 module_param(id, charp, 0444);
71 MODULE_PARM_DESC(id, "ID string for MotuMTPAV MIDI.");
72 module_param_hw(port, long, ioport, 0444);
73 MODULE_PARM_DESC(port, "Parallel port # for MotuMTPAV MIDI.");
74 module_param_hw(irq, int, irq, 0444);
75 MODULE_PARM_DESC(irq, "Parallel IRQ # for MotuMTPAV MIDI.");
76 module_param(hwports, int, 0444);
77 MODULE_PARM_DESC(hwports, "Hardware ports # for MotuMTPAV MIDI.");
78 
79 static struct platform_device *device;
80 
81 /*
82  *      defines
83  */
84 //#define USE_FAKE_MTP //       don't actually read/write to MTP device (for debugging without an actual unit) (does not work yet)
85 
86 // parallel port usage masks
87 #define SIGS_BYTE 0x08
88 #define SIGS_RFD 0x80
89 #define SIGS_IRQ 0x40
90 #define SIGS_IN0 0x10
91 #define SIGS_IN1 0x20
92 
93 #define SIGC_WRITE 0x04
94 #define SIGC_READ 0x08
95 #define SIGC_INTEN 0x10
96 
97 #define DREG 0
98 #define SREG 1
99 #define CREG 2
100 
101 //
102 #define MTPAV_MODE_INPUT_OPENED		0x01
103 #define MTPAV_MODE_OUTPUT_OPENED	0x02
104 #define MTPAV_MODE_INPUT_TRIGGERED	0x04
105 #define MTPAV_MODE_OUTPUT_TRIGGERED	0x08
106 
107 #define NUMPORTS (0x12+1)
108 
109 
110 /*
111  */
112 
113 struct mtpav_port {
114 	u8 number;
115 	u8 hwport;
116 	u8 mode;
117 	u8 running_status;
118 	struct snd_rawmidi_substream *input;
119 	struct snd_rawmidi_substream *output;
120 };
121 
122 struct mtpav {
123 	struct snd_card *card;
124 	unsigned long port;
125 	struct resource *res_port;
126 	int irq;			/* interrupt (for inputs) */
127 	spinlock_t spinlock;
128 	int share_irq;			/* number of accesses to input interrupts */
129 	int istimer;			/* number of accesses to timer interrupts */
130 	struct timer_list timer;	/* timer interrupts for outputs */
131 	struct snd_rawmidi *rmidi;
132 	int num_ports;		/* number of hw ports (1-8) */
133 	struct mtpav_port ports[NUMPORTS];	/* all ports including computer, adat and bc */
134 
135 	u32 inmidiport;		/* selected input midi port */
136 	u32 inmidistate;	/* during midi command 0xf5 */
137 
138 	u32 outmidihwport;	/* selected output midi hw port */
139 };
140 
141 
142 /*
143  * possible hardware ports (selected by 0xf5 port message)
144  *      0x00		all ports
145  *      0x01 .. 0x08    this MTP's ports 1..8
146  *      0x09 .. 0x10    networked MTP's ports (9..16)
147  *      0x11            networked MTP's computer port
148  *      0x63            to ADAT
149  *
150  * mappig:
151  *  subdevice 0 - (X-1)    ports
152  *            X - (2*X-1)  networked ports
153  *            X            computer
154  *            X+1          ADAT
155  *            X+2          all ports
156  *
157  *  where X = chip->num_ports
158  */
159 
160 #define MTPAV_PIDX_COMPUTER	0
161 #define MTPAV_PIDX_ADAT		1
162 #define MTPAV_PIDX_BROADCAST	2
163 
164 
translate_subdevice_to_hwport(struct mtpav * chip,int subdev)165 static int translate_subdevice_to_hwport(struct mtpav *chip, int subdev)
166 {
167 	if (subdev < 0)
168 		return 0x01; /* invalid - use port 0 as default */
169 	else if (subdev < chip->num_ports)
170 		return subdev + 1; /* single mtp port */
171 	else if (subdev < chip->num_ports * 2)
172 		return subdev - chip->num_ports + 0x09; /* remote port */
173 	else if (subdev == chip->num_ports * 2 + MTPAV_PIDX_COMPUTER)
174 		return 0x11; /* computer port */
175 	else if (subdev == chip->num_ports + MTPAV_PIDX_ADAT)
176 		return 0x63;		/* ADAT */
177 	return 0; /* all ports */
178 }
179 
translate_hwport_to_subdevice(struct mtpav * chip,int hwport)180 static int translate_hwport_to_subdevice(struct mtpav *chip, int hwport)
181 {
182 	int p;
183 	if (hwport <= 0x00) /* all ports */
184 		return chip->num_ports + MTPAV_PIDX_BROADCAST;
185 	else if (hwport <= 0x08) { /* single port */
186 		p = hwport - 1;
187 		if (p >= chip->num_ports)
188 			p = 0;
189 		return p;
190 	} else if (hwport <= 0x10) { /* remote port */
191 		p = hwport - 0x09 + chip->num_ports;
192 		if (p >= chip->num_ports * 2)
193 			p = chip->num_ports;
194 		return p;
195 	} else if (hwport == 0x11)  /* computer port */
196 		return chip->num_ports + MTPAV_PIDX_COMPUTER;
197 	else  /* ADAT */
198 		return chip->num_ports + MTPAV_PIDX_ADAT;
199 }
200 
201 
202 /*
203  */
204 
snd_mtpav_getreg(struct mtpav * chip,u16 reg)205 static u8 snd_mtpav_getreg(struct mtpav *chip, u16 reg)
206 {
207 	u8 rval = 0;
208 
209 	if (reg == SREG) {
210 		rval = inb(chip->port + SREG);
211 		rval = (rval & 0xf8);
212 	} else if (reg == CREG) {
213 		rval = inb(chip->port + CREG);
214 		rval = (rval & 0x1c);
215 	}
216 
217 	return rval;
218 }
219 
220 /*
221  */
222 
snd_mtpav_mputreg(struct mtpav * chip,u16 reg,u8 val)223 static inline void snd_mtpav_mputreg(struct mtpav *chip, u16 reg, u8 val)
224 {
225 	if (reg == DREG || reg == CREG)
226 		outb(val, chip->port + reg);
227 }
228 
229 /*
230  */
231 
snd_mtpav_wait_rfdhi(struct mtpav * chip)232 static void snd_mtpav_wait_rfdhi(struct mtpav *chip)
233 {
234 	int counts = 10000;
235 	u8 sbyte;
236 
237 	sbyte = snd_mtpav_getreg(chip, SREG);
238 	while (!(sbyte & SIGS_RFD) && counts--) {
239 		sbyte = snd_mtpav_getreg(chip, SREG);
240 		udelay(10);
241 	}
242 }
243 
snd_mtpav_send_byte(struct mtpav * chip,u8 byte)244 static void snd_mtpav_send_byte(struct mtpav *chip, u8 byte)
245 {
246 	u8 tcbyt;
247 	u8 clrwrite;
248 	u8 setwrite;
249 
250 	snd_mtpav_wait_rfdhi(chip);
251 
252 	/////////////////
253 
254 	tcbyt = snd_mtpav_getreg(chip, CREG);
255 	clrwrite = tcbyt & (SIGC_WRITE ^ 0xff);
256 	setwrite = tcbyt | SIGC_WRITE;
257 
258 	snd_mtpav_mputreg(chip, DREG, byte);
259 	snd_mtpav_mputreg(chip, CREG, clrwrite);	// clear write bit
260 
261 	snd_mtpav_mputreg(chip, CREG, setwrite);	// set write bit
262 
263 }
264 
265 
266 /*
267  */
268 
269 /* call this with spin lock held */
snd_mtpav_output_port_write(struct mtpav * mtp_card,struct mtpav_port * portp,struct snd_rawmidi_substream * substream)270 static void snd_mtpav_output_port_write(struct mtpav *mtp_card,
271 					struct mtpav_port *portp,
272 					struct snd_rawmidi_substream *substream)
273 {
274 	u8 outbyte;
275 
276 	// Get the outbyte first, so we can emulate running status if
277 	// necessary
278 	if (snd_rawmidi_transmit(substream, &outbyte, 1) != 1)
279 		return;
280 
281 	// send port change command if necessary
282 
283 	if (portp->hwport != mtp_card->outmidihwport) {
284 		mtp_card->outmidihwport = portp->hwport;
285 
286 		snd_mtpav_send_byte(mtp_card, 0xf5);
287 		snd_mtpav_send_byte(mtp_card, portp->hwport);
288 		/*
289 		snd_printk(KERN_DEBUG "new outport: 0x%x\n",
290 			   (unsigned int) portp->hwport);
291 		*/
292 		if (!(outbyte & 0x80) && portp->running_status)
293 			snd_mtpav_send_byte(mtp_card, portp->running_status);
294 	}
295 
296 	// send data
297 
298 	do {
299 		if (outbyte & 0x80)
300 			portp->running_status = outbyte;
301 
302 		snd_mtpav_send_byte(mtp_card, outbyte);
303 	} while (snd_rawmidi_transmit(substream, &outbyte, 1) == 1);
304 }
305 
snd_mtpav_output_write(struct snd_rawmidi_substream * substream)306 static void snd_mtpav_output_write(struct snd_rawmidi_substream *substream)
307 {
308 	struct mtpav *mtp_card = substream->rmidi->private_data;
309 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
310 	unsigned long flags;
311 
312 	spin_lock_irqsave(&mtp_card->spinlock, flags);
313 	snd_mtpav_output_port_write(mtp_card, portp, substream);
314 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
315 }
316 
317 
318 /*
319  *      mtpav control
320  */
321 
snd_mtpav_portscan(struct mtpav * chip)322 static void snd_mtpav_portscan(struct mtpav *chip)	// put mtp into smart routing mode
323 {
324 	u8 p;
325 
326 	for (p = 0; p < 8; p++) {
327 		snd_mtpav_send_byte(chip, 0xf5);
328 		snd_mtpav_send_byte(chip, p);
329 		snd_mtpav_send_byte(chip, 0xfe);
330 	}
331 }
332 
333 /*
334  */
335 
snd_mtpav_input_open(struct snd_rawmidi_substream * substream)336 static int snd_mtpav_input_open(struct snd_rawmidi_substream *substream)
337 {
338 	struct mtpav *mtp_card = substream->rmidi->private_data;
339 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
340 	unsigned long flags;
341 
342 	spin_lock_irqsave(&mtp_card->spinlock, flags);
343 	portp->mode |= MTPAV_MODE_INPUT_OPENED;
344 	portp->input = substream;
345 	if (mtp_card->share_irq++ == 0)
346 		snd_mtpav_mputreg(mtp_card, CREG, (SIGC_INTEN | SIGC_WRITE));	// enable pport interrupts
347 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
348 	return 0;
349 }
350 
351 /*
352  */
353 
snd_mtpav_input_close(struct snd_rawmidi_substream * substream)354 static int snd_mtpav_input_close(struct snd_rawmidi_substream *substream)
355 {
356 	struct mtpav *mtp_card = substream->rmidi->private_data;
357 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
358 	unsigned long flags;
359 
360 	spin_lock_irqsave(&mtp_card->spinlock, flags);
361 	portp->mode &= ~MTPAV_MODE_INPUT_OPENED;
362 	portp->input = NULL;
363 	if (--mtp_card->share_irq == 0)
364 		snd_mtpav_mputreg(mtp_card, CREG, 0);	// disable pport interrupts
365 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
366 	return 0;
367 }
368 
369 /*
370  */
371 
snd_mtpav_input_trigger(struct snd_rawmidi_substream * substream,int up)372 static void snd_mtpav_input_trigger(struct snd_rawmidi_substream *substream, int up)
373 {
374 	struct mtpav *mtp_card = substream->rmidi->private_data;
375 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
376 	unsigned long flags;
377 
378 	spin_lock_irqsave(&mtp_card->spinlock, flags);
379 	if (up)
380 		portp->mode |= MTPAV_MODE_INPUT_TRIGGERED;
381 	else
382 		portp->mode &= ~MTPAV_MODE_INPUT_TRIGGERED;
383 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
384 
385 }
386 
387 
388 /*
389  * timer interrupt for outputs
390  */
391 
snd_mtpav_output_timer(struct timer_list * t)392 static void snd_mtpav_output_timer(struct timer_list *t)
393 {
394 	unsigned long flags;
395 	struct mtpav *chip = from_timer(chip, t, timer);
396 	int p;
397 
398 	spin_lock_irqsave(&chip->spinlock, flags);
399 	/* reprogram timer */
400 	mod_timer(&chip->timer, 1 + jiffies);
401 	/* process each port */
402 	for (p = 0; p <= chip->num_ports * 2 + MTPAV_PIDX_BROADCAST; p++) {
403 		struct mtpav_port *portp = &chip->ports[p];
404 		if ((portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED) && portp->output)
405 			snd_mtpav_output_port_write(chip, portp, portp->output);
406 	}
407 	spin_unlock_irqrestore(&chip->spinlock, flags);
408 }
409 
410 /* spinlock held! */
snd_mtpav_add_output_timer(struct mtpav * chip)411 static void snd_mtpav_add_output_timer(struct mtpav *chip)
412 {
413 	mod_timer(&chip->timer, 1 + jiffies);
414 }
415 
416 /* spinlock held! */
snd_mtpav_remove_output_timer(struct mtpav * chip)417 static void snd_mtpav_remove_output_timer(struct mtpav *chip)
418 {
419 	del_timer(&chip->timer);
420 }
421 
422 /*
423  */
424 
snd_mtpav_output_open(struct snd_rawmidi_substream * substream)425 static int snd_mtpav_output_open(struct snd_rawmidi_substream *substream)
426 {
427 	struct mtpav *mtp_card = substream->rmidi->private_data;
428 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
429 	unsigned long flags;
430 
431 	spin_lock_irqsave(&mtp_card->spinlock, flags);
432 	portp->mode |= MTPAV_MODE_OUTPUT_OPENED;
433 	portp->output = substream;
434 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
435 	return 0;
436 };
437 
438 /*
439  */
440 
snd_mtpav_output_close(struct snd_rawmidi_substream * substream)441 static int snd_mtpav_output_close(struct snd_rawmidi_substream *substream)
442 {
443 	struct mtpav *mtp_card = substream->rmidi->private_data;
444 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
445 	unsigned long flags;
446 
447 	spin_lock_irqsave(&mtp_card->spinlock, flags);
448 	portp->mode &= ~MTPAV_MODE_OUTPUT_OPENED;
449 	portp->output = NULL;
450 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
451 	return 0;
452 };
453 
454 /*
455  */
456 
snd_mtpav_output_trigger(struct snd_rawmidi_substream * substream,int up)457 static void snd_mtpav_output_trigger(struct snd_rawmidi_substream *substream, int up)
458 {
459 	struct mtpav *mtp_card = substream->rmidi->private_data;
460 	struct mtpav_port *portp = &mtp_card->ports[substream->number];
461 	unsigned long flags;
462 
463 	spin_lock_irqsave(&mtp_card->spinlock, flags);
464 	if (up) {
465 		if (! (portp->mode & MTPAV_MODE_OUTPUT_TRIGGERED)) {
466 			if (mtp_card->istimer++ == 0)
467 				snd_mtpav_add_output_timer(mtp_card);
468 			portp->mode |= MTPAV_MODE_OUTPUT_TRIGGERED;
469 		}
470 	} else {
471 		portp->mode &= ~MTPAV_MODE_OUTPUT_TRIGGERED;
472 		if (--mtp_card->istimer == 0)
473 			snd_mtpav_remove_output_timer(mtp_card);
474 	}
475 	spin_unlock_irqrestore(&mtp_card->spinlock, flags);
476 
477 	if (up)
478 		snd_mtpav_output_write(substream);
479 }
480 
481 /*
482  * midi interrupt for inputs
483  */
484 
snd_mtpav_inmidi_process(struct mtpav * mcrd,u8 inbyte)485 static void snd_mtpav_inmidi_process(struct mtpav *mcrd, u8 inbyte)
486 {
487 	struct mtpav_port *portp;
488 
489 	if ((int)mcrd->inmidiport > mcrd->num_ports * 2 + MTPAV_PIDX_BROADCAST)
490 		return;
491 
492 	portp = &mcrd->ports[mcrd->inmidiport];
493 	if (portp->mode & MTPAV_MODE_INPUT_TRIGGERED)
494 		snd_rawmidi_receive(portp->input, &inbyte, 1);
495 }
496 
snd_mtpav_inmidi_h(struct mtpav * mcrd,u8 inbyte)497 static void snd_mtpav_inmidi_h(struct mtpav *mcrd, u8 inbyte)
498 {
499 	if (inbyte >= 0xf8) {
500 		/* real-time midi code */
501 		snd_mtpav_inmidi_process(mcrd, inbyte);
502 		return;
503 	}
504 
505 	if (mcrd->inmidistate == 0) {	// awaiting command
506 		if (inbyte == 0xf5)	// MTP port #
507 			mcrd->inmidistate = 1;
508 		else
509 			snd_mtpav_inmidi_process(mcrd, inbyte);
510 	} else if (mcrd->inmidistate) {
511 		mcrd->inmidiport = translate_hwport_to_subdevice(mcrd, inbyte);
512 		mcrd->inmidistate = 0;
513 	}
514 }
515 
snd_mtpav_read_bytes(struct mtpav * mcrd)516 static void snd_mtpav_read_bytes(struct mtpav *mcrd)
517 {
518 	u8 clrread, setread;
519 	u8 mtp_read_byte;
520 	u8 sr, cbyt;
521 	int i;
522 
523 	u8 sbyt = snd_mtpav_getreg(mcrd, SREG);
524 
525 	/* printk(KERN_DEBUG "snd_mtpav_read_bytes() sbyt: 0x%x\n", sbyt); */
526 
527 	if (!(sbyt & SIGS_BYTE))
528 		return;
529 
530 	cbyt = snd_mtpav_getreg(mcrd, CREG);
531 	clrread = cbyt & (SIGC_READ ^ 0xff);
532 	setread = cbyt | SIGC_READ;
533 
534 	do {
535 
536 		mtp_read_byte = 0;
537 		for (i = 0; i < 4; i++) {
538 			snd_mtpav_mputreg(mcrd, CREG, setread);
539 			sr = snd_mtpav_getreg(mcrd, SREG);
540 			snd_mtpav_mputreg(mcrd, CREG, clrread);
541 
542 			sr &= SIGS_IN0 | SIGS_IN1;
543 			sr >>= 4;
544 			mtp_read_byte |= sr << (i * 2);
545 		}
546 
547 		snd_mtpav_inmidi_h(mcrd, mtp_read_byte);
548 
549 		sbyt = snd_mtpav_getreg(mcrd, SREG);
550 
551 	} while (sbyt & SIGS_BYTE);
552 }
553 
snd_mtpav_irqh(int irq,void * dev_id)554 static irqreturn_t snd_mtpav_irqh(int irq, void *dev_id)
555 {
556 	struct mtpav *mcard = dev_id;
557 
558 	spin_lock(&mcard->spinlock);
559 	snd_mtpav_read_bytes(mcard);
560 	spin_unlock(&mcard->spinlock);
561 	return IRQ_HANDLED;
562 }
563 
564 /*
565  * get ISA resources
566  */
snd_mtpav_get_ISA(struct mtpav * mcard)567 static int snd_mtpav_get_ISA(struct mtpav *mcard)
568 {
569 	mcard->res_port = devm_request_region(mcard->card->dev, port, 3,
570 					      "MotuMTPAV MIDI");
571 	if (!mcard->res_port) {
572 		snd_printk(KERN_ERR "MTVAP port 0x%lx is busy\n", port);
573 		return -EBUSY;
574 	}
575 	mcard->port = port;
576 	if (devm_request_irq(mcard->card->dev, irq, snd_mtpav_irqh, 0,
577 			     "MOTU MTPAV", mcard)) {
578 		snd_printk(KERN_ERR "MTVAP IRQ %d busy\n", irq);
579 		return -EBUSY;
580 	}
581 	mcard->irq = irq;
582 	return 0;
583 }
584 
585 
586 /*
587  */
588 
589 static const struct snd_rawmidi_ops snd_mtpav_output = {
590 	.open =		snd_mtpav_output_open,
591 	.close =	snd_mtpav_output_close,
592 	.trigger =	snd_mtpav_output_trigger,
593 };
594 
595 static const struct snd_rawmidi_ops snd_mtpav_input = {
596 	.open =		snd_mtpav_input_open,
597 	.close =	snd_mtpav_input_close,
598 	.trigger =	snd_mtpav_input_trigger,
599 };
600 
601 
602 /*
603  * get RAWMIDI resources
604  */
605 
snd_mtpav_set_name(struct mtpav * chip,struct snd_rawmidi_substream * substream)606 static void snd_mtpav_set_name(struct mtpav *chip,
607 			       struct snd_rawmidi_substream *substream)
608 {
609 	if (substream->number >= 0 && substream->number < chip->num_ports)
610 		sprintf(substream->name, "MTP direct %d", (substream->number % chip->num_ports) + 1);
611 	else if (substream->number >= 8 && substream->number < chip->num_ports * 2)
612 		sprintf(substream->name, "MTP remote %d", (substream->number % chip->num_ports) + 1);
613 	else if (substream->number == chip->num_ports * 2)
614 		strcpy(substream->name, "MTP computer");
615 	else if (substream->number == chip->num_ports * 2 + 1)
616 		strcpy(substream->name, "MTP ADAT");
617 	else
618 		strcpy(substream->name, "MTP broadcast");
619 }
620 
snd_mtpav_get_RAWMIDI(struct mtpav * mcard)621 static int snd_mtpav_get_RAWMIDI(struct mtpav *mcard)
622 {
623 	int rval;
624 	struct snd_rawmidi *rawmidi;
625 	struct snd_rawmidi_substream *substream;
626 	struct list_head *list;
627 
628 	if (hwports < 1)
629 		hwports = 1;
630 	else if (hwports > 8)
631 		hwports = 8;
632 	mcard->num_ports = hwports;
633 
634 	rval = snd_rawmidi_new(mcard->card, "MotuMIDI", 0,
635 			       mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
636 			       mcard->num_ports * 2 + MTPAV_PIDX_BROADCAST + 1,
637 			       &mcard->rmidi);
638 	if (rval < 0)
639 		return rval;
640 	rawmidi = mcard->rmidi;
641 	rawmidi->private_data = mcard;
642 
643 	list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) {
644 		substream = list_entry(list, struct snd_rawmidi_substream, list);
645 		snd_mtpav_set_name(mcard, substream);
646 		substream->ops = &snd_mtpav_input;
647 	}
648 	list_for_each(list, &rawmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) {
649 		substream = list_entry(list, struct snd_rawmidi_substream, list);
650 		snd_mtpav_set_name(mcard, substream);
651 		substream->ops = &snd_mtpav_output;
652 		mcard->ports[substream->number].hwport = translate_subdevice_to_hwport(mcard, substream->number);
653 	}
654 	rawmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT |
655 			       SNDRV_RAWMIDI_INFO_DUPLEX;
656 	sprintf(rawmidi->name, "MTP AV MIDI");
657 	return 0;
658 }
659 
660 /*
661  */
662 
snd_mtpav_free(struct snd_card * card)663 static void snd_mtpav_free(struct snd_card *card)
664 {
665 	struct mtpav *crd = card->private_data;
666 	unsigned long flags;
667 
668 	spin_lock_irqsave(&crd->spinlock, flags);
669 	if (crd->istimer > 0)
670 		snd_mtpav_remove_output_timer(crd);
671 	spin_unlock_irqrestore(&crd->spinlock, flags);
672 }
673 
674 /*
675  */
snd_mtpav_probe(struct platform_device * dev)676 static int snd_mtpav_probe(struct platform_device *dev)
677 {
678 	struct snd_card *card;
679 	int err;
680 	struct mtpav *mtp_card;
681 
682 	err = snd_devm_card_new(&dev->dev, index, id, THIS_MODULE,
683 				sizeof(*mtp_card), &card);
684 	if (err < 0)
685 		return err;
686 
687 	mtp_card = card->private_data;
688 	spin_lock_init(&mtp_card->spinlock);
689 	mtp_card->card = card;
690 	mtp_card->irq = -1;
691 	mtp_card->share_irq = 0;
692 	mtp_card->inmidistate = 0;
693 	mtp_card->outmidihwport = 0xffffffff;
694 	timer_setup(&mtp_card->timer, snd_mtpav_output_timer, 0);
695 
696 	err = snd_mtpav_get_RAWMIDI(mtp_card);
697 	if (err < 0)
698 		return err;
699 
700 	mtp_card->inmidiport = mtp_card->num_ports + MTPAV_PIDX_BROADCAST;
701 
702 	err = snd_mtpav_get_ISA(mtp_card);
703 	if (err < 0)
704 		return err;
705 
706 	strcpy(card->driver, "MTPAV");
707 	strcpy(card->shortname, "MTPAV on parallel port");
708 	snprintf(card->longname, sizeof(card->longname),
709 		 "MTPAV on parallel port at 0x%lx", port);
710 
711 	snd_mtpav_portscan(mtp_card);
712 
713 	err = snd_card_register(mtp_card->card);
714 	if (err < 0)
715 		return err;
716 
717 	card->private_free = snd_mtpav_free;
718 
719 	platform_set_drvdata(dev, card);
720 	printk(KERN_INFO "Motu MidiTimePiece on parallel port irq: %d ioport: 0x%lx\n", irq, port);
721 	return 0;
722 }
723 
724 #define SND_MTPAV_DRIVER	"snd_mtpav"
725 
726 static struct platform_driver snd_mtpav_driver = {
727 	.probe		= snd_mtpav_probe,
728 	.driver		= {
729 		.name	= SND_MTPAV_DRIVER,
730 	},
731 };
732 
alsa_card_mtpav_init(void)733 static int __init alsa_card_mtpav_init(void)
734 {
735 	int err;
736 
737 	err = platform_driver_register(&snd_mtpav_driver);
738 	if (err < 0)
739 		return err;
740 
741 	device = platform_device_register_simple(SND_MTPAV_DRIVER, -1, NULL, 0);
742 	if (!IS_ERR(device)) {
743 		if (platform_get_drvdata(device))
744 			return 0;
745 		platform_device_unregister(device);
746 		err = -ENODEV;
747 	} else
748 		err = PTR_ERR(device);
749 	platform_driver_unregister(&snd_mtpav_driver);
750 	return err;
751 }
752 
alsa_card_mtpav_exit(void)753 static void __exit alsa_card_mtpav_exit(void)
754 {
755 	platform_device_unregister(device);
756 	platform_driver_unregister(&snd_mtpav_driver);
757 }
758 
759 module_init(alsa_card_mtpav_init)
760 module_exit(alsa_card_mtpav_exit)
761