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x86/amd-iommu: Add per IOMMU reference counting
[linux/fpc-iii.git] / sound / drivers / portman2x4.c
blob60158e2e0eafb529e00013b4a9997d325b1b7fa2
1 /*
2 * Driver for Midiman Portman2x4 parallel port midi interface
3 *
4 * Copyright (c) by Levent Guendogdu <levon@feature-it.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 * ChangeLog
21 * Jan 24 2007 Matthias Koenig <mkoenig@suse.de>
22 * - cleanup and rewrite
23 * Sep 30 2004 Tobias Gehrig <tobias@gehrig.tk>
24 * - source code cleanup
25 * Sep 03 2004 Tobias Gehrig <tobias@gehrig.tk>
26 * - fixed compilation problem with alsa 1.0.6a (removed MODULE_CLASSES,
27 * MODULE_PARM_SYNTAX and changed MODULE_DEVICES to
28 * MODULE_SUPPORTED_DEVICE)
29 * Mar 24 2004 Tobias Gehrig <tobias@gehrig.tk>
30 * - added 2.6 kernel support
31 * Mar 18 2004 Tobias Gehrig <tobias@gehrig.tk>
32 * - added parport_unregister_driver to the startup routine if the driver fails to detect a portman
33 * - added support for all 4 output ports in portman_putmidi
34 * Mar 17 2004 Tobias Gehrig <tobias@gehrig.tk>
35 * - added checks for opened input device in interrupt handler
36 * Feb 20 2004 Tobias Gehrig <tobias@gehrig.tk>
37 * - ported from alsa 0.5 to 1.0
38 */
39
40 #include <linux/init.h>
41 #include <linux/platform_device.h>
42 #include <linux/parport.h>
43 #include <linux/spinlock.h>
44 #include <linux/delay.h>
45 #include <sound/core.h>
46 #include <sound/initval.h>
47 #include <sound/rawmidi.h>
48 #include <sound/control.h>
49
50 #define CARD_NAME "Portman 2x4"
51 #define DRIVER_NAME "portman"
52 #define PLATFORM_DRIVER "snd_portman2x4"
53
54 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
55 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
56 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
57
58 static struct platform_device *platform_devices[SNDRV_CARDS];
59 static int device_count;
60
61 module_param_array(index, int, NULL, S_IRUGO);
62 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
63 module_param_array(id, charp, NULL, S_IRUGO);
64 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
65 module_param_array(enable, bool, NULL, S_IRUGO);
66 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
67
68 MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig");
69 MODULE_DESCRIPTION("Midiman Portman2x4");
70 MODULE_LICENSE("GPL");
71 MODULE_SUPPORTED_DEVICE("{{Midiman,Portman2x4}}");
72
73 /*********************************************************************
74 * Chip specific
75 *********************************************************************/
76 #define PORTMAN_NUM_INPUT_PORTS 2
77 #define PORTMAN_NUM_OUTPUT_PORTS 4
78
79 struct portman {
80 spinlock_t reg_lock;
81 struct snd_card *card;
82 struct snd_rawmidi *rmidi;
83 struct pardevice *pardev;
84 int pardev_claimed;
85
86 int open_count;
87 int mode[PORTMAN_NUM_INPUT_PORTS];
88 struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS];
89 };
90
91 static int portman_free(struct portman *pm)
92 {
93 kfree(pm);
94 return 0;
95 }
96
97 static int __devinit portman_create(struct snd_card *card,
98 struct pardevice *pardev,
99 struct portman **rchip)
100 {
101 struct portman *pm;
102
103 *rchip = NULL;
104
105 pm = kzalloc(sizeof(struct portman), GFP_KERNEL);
106 if (pm == NULL)
107 return -ENOMEM;
108
109 /* Init chip specific data */
110 spin_lock_init(&pm->reg_lock);
111 pm->card = card;
112 pm->pardev = pardev;
113
114 *rchip = pm;
115
116 return 0;
117 }
118
119 /*********************************************************************
120 * HW related constants
121 *********************************************************************/
122
123 /* Standard PC parallel port status register equates. */
124 #define PP_STAT_BSY 0x80 /* Busy status. Inverted. */
125 #define PP_STAT_ACK 0x40 /* Acknowledge. Non-Inverted. */
126 #define PP_STAT_POUT 0x20 /* Paper Out. Non-Inverted. */
127 #define PP_STAT_SEL 0x10 /* Select. Non-Inverted. */
128 #define PP_STAT_ERR 0x08 /* Error. Non-Inverted. */
129
130 /* Standard PC parallel port command register equates. */
131 #define PP_CMD_IEN 0x10 /* IRQ Enable. Non-Inverted. */
132 #define PP_CMD_SELI 0x08 /* Select Input. Inverted. */
133 #define PP_CMD_INIT 0x04 /* Init Printer. Non-Inverted. */
134 #define PP_CMD_FEED 0x02 /* Auto Feed. Inverted. */
135 #define PP_CMD_STB 0x01 /* Strobe. Inverted. */
136
137 /* Parallel Port Command Register as implemented by PCP2x4. */
138 #define INT_EN PP_CMD_IEN /* Interrupt enable. */
139 #define STROBE PP_CMD_STB /* Command strobe. */
140
141 /* The parallel port command register field (b1..b3) selects the
142 * various "registers" within the PC/P 2x4. These are the internal
143 * address of these "registers" that must be written to the parallel
144 * port command register.
145 */
146 #define RXDATA0 (0 << 1) /* PCP RxData channel 0. */
147 #define RXDATA1 (1 << 1) /* PCP RxData channel 1. */
148 #define GEN_CTL (2 << 1) /* PCP General Control Register. */
149 #define SYNC_CTL (3 << 1) /* PCP Sync Control Register. */
150 #define TXDATA0 (4 << 1) /* PCP TxData channel 0. */
151 #define TXDATA1 (5 << 1) /* PCP TxData channel 1. */
152 #define TXDATA2 (6 << 1) /* PCP TxData channel 2. */
153 #define TXDATA3 (7 << 1) /* PCP TxData channel 3. */
154
155 /* Parallel Port Status Register as implemented by PCP2x4. */
156 #define ESTB PP_STAT_POUT /* Echoed strobe. */
157 #define INT_REQ PP_STAT_ACK /* Input data int request. */
158 #define BUSY PP_STAT_ERR /* Interface Busy. */
159
160 /* Parallel Port Status Register BUSY and SELECT lines are multiplexed
161 * between several functions. Depending on which 2x4 "register" is
162 * currently selected (b1..b3), the BUSY and SELECT lines are
163 * assigned as follows:
164 *
165 * SELECT LINE: A3 A2 A1
166 * --------
167 */
168 #define RXAVAIL PP_STAT_SEL /* Rx Available, channel 0. 0 0 0 */
169 // RXAVAIL1 PP_STAT_SEL /* Rx Available, channel 1. 0 0 1 */
170 #define SYNC_STAT PP_STAT_SEL /* Reserved - Sync Status. 0 1 0 */
171 // /* Reserved. 0 1 1 */
172 #define TXEMPTY PP_STAT_SEL /* Tx Empty, channel 0. 1 0 0 */
173 // TXEMPTY1 PP_STAT_SEL /* Tx Empty, channel 1. 1 0 1 */
174 // TXEMPTY2 PP_STAT_SEL /* Tx Empty, channel 2. 1 1 0 */
175 // TXEMPTY3 PP_STAT_SEL /* Tx Empty, channel 3. 1 1 1 */
176
177 /* BUSY LINE: A3 A2 A1
178 * --------
179 */
180 #define RXDATA PP_STAT_BSY /* Rx Input Data, channel 0. 0 0 0 */
181 // RXDATA1 PP_STAT_BSY /* Rx Input Data, channel 1. 0 0 1 */
182 #define SYNC_DATA PP_STAT_BSY /* Reserved - Sync Data. 0 1 0 */
183 /* Reserved. 0 1 1 */
184 #define DATA_ECHO PP_STAT_BSY /* Parallel Port Data Echo. 1 0 0 */
185 #define A0_ECHO PP_STAT_BSY /* Address 0 Echo. 1 0 1 */
186 #define A1_ECHO PP_STAT_BSY /* Address 1 Echo. 1 1 0 */
187 #define A2_ECHO PP_STAT_BSY /* Address 2 Echo. 1 1 1 */
188
189 #define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01
190
191 /*********************************************************************
192 * Hardware specific functions
193 *********************************************************************/
194 static inline void portman_write_command(struct portman *pm, u8 value)
195 {
196 parport_write_control(pm->pardev->port, value);
197 }
198
199 static inline u8 portman_read_command(struct portman *pm)
200 {
201 return parport_read_control(pm->pardev->port);
202 }
203
204 static inline u8 portman_read_status(struct portman *pm)
205 {
206 return parport_read_status(pm->pardev->port);
207 }
208
209 static inline u8 portman_read_data(struct portman *pm)
210 {
211 return parport_read_data(pm->pardev->port);
212 }
213
214 static inline void portman_write_data(struct portman *pm, u8 value)
215 {
216 parport_write_data(pm->pardev->port, value);
217 }
218
219 static void portman_write_midi(struct portman *pm,
220 int port, u8 mididata)
221 {
222 int command = ((port + 4) << 1);
223
224 /* Get entering data byte and port number in BL and BH respectively.
225 * Set up Tx Channel address field for use with PP Cmd Register.
226 * Store address field in BH register.
227 * Inputs: AH = Output port number (0..3).
228 * AL = Data byte.
229 * command = TXDATA0 | INT_EN;
230 * Align port num with address field (b1...b3),
231 * set address for TXDatax, Strobe=0
232 */
233 command |= INT_EN;
234
235 /* Disable interrupts so that the process is not interrupted, then
236 * write the address associated with the current Tx channel to the
237 * PP Command Reg. Do not set the Strobe signal yet.
238 */
239
240 do {
241 portman_write_command(pm, command);
242
243 /* While the address lines settle, write parallel output data to
244 * PP Data Reg. This has no effect until Strobe signal is asserted.
245 */
246
247 portman_write_data(pm, mididata);
248
249 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
250 * Status Register), then go write data. Else go back and wait.
251 */
252 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY);
253
254 /* TxEmpty is set. Maintain PC/P destination address and assert
255 * Strobe through the PP Command Reg. This will Strobe data into
256 * the PC/P transmitter and set the PC/P BUSY signal.
257 */
258
259 portman_write_command(pm, command | STROBE);
260
261 /* Wait for strobe line to settle and echo back through hardware.
262 * Once it has echoed back, assume that the address and data lines
263 * have settled!
264 */
265
266 while ((portman_read_status(pm) & ESTB) == 0)
267 cpu_relax();
268
269 /* Release strobe and immediately re-allow interrupts. */
270 portman_write_command(pm, command);
271
272 while ((portman_read_status(pm) & ESTB) == ESTB)
273 cpu_relax();
274
275 /* PC/P BUSY is now set. We must wait until BUSY resets itself.
276 * We'll reenable ints while we're waiting.
277 */
278
279 while ((portman_read_status(pm) & BUSY) == BUSY)
280 cpu_relax();
281
282 /* Data sent. */
283 }
284
285
286 /*
287 * Read MIDI byte from port
288 * Attempt to read input byte from specified hardware input port (0..).
289 * Return -1 if no data
290 */
291 static int portman_read_midi(struct portman *pm, int port)
292 {
293 unsigned char midi_data = 0;
294 unsigned char cmdout; /* Saved address+IE bit. */
295
296 /* Make sure clocking edge is down before starting... */
297 portman_write_data(pm, 0); /* Make sure edge is down. */
298
299 /* Set destination address to PCP. */
300 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */
301 portman_write_command(pm, cmdout);
302
303 while ((portman_read_status(pm) & ESTB) == ESTB)
304 cpu_relax(); /* Wait for strobe echo. */
305
306 /* After the address lines settle, check multiplexed RxAvail signal.
307 * If data is available, read it.
308 */
309 if ((portman_read_status(pm) & RXAVAIL) == 0)
310 return -1; /* No data. */
311
312 /* Set the Strobe signal to enable the Rx clocking circuitry. */
313 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */
314
315 while ((portman_read_status(pm) & ESTB) == 0)
316 cpu_relax(); /* Wait for strobe echo. */
317
318 /* The first data bit (msb) is already sitting on the input line. */
319 midi_data = (portman_read_status(pm) & 128);
320 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
321
322 /* Data bit 6. */
323 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
324 midi_data |= (portman_read_status(pm) >> 1) & 64;
325 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
326
327 /* Data bit 5. */
328 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
329 midi_data |= (portman_read_status(pm) >> 2) & 32;
330 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
331
332 /* Data bit 4. */
333 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
334 midi_data |= (portman_read_status(pm) >> 3) & 16;
335 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
336
337 /* Data bit 3. */
338 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
339 midi_data |= (portman_read_status(pm) >> 4) & 8;
340 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
341
342 /* Data bit 2. */
343 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
344 midi_data |= (portman_read_status(pm) >> 5) & 4;
345 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
346
347 /* Data bit 1. */
348 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
349 midi_data |= (portman_read_status(pm) >> 6) & 2;
350 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
351
352 /* Data bit 0. */
353 portman_write_data(pm, 0); /* Cause falling edge while data settles. */
354 midi_data |= (portman_read_status(pm) >> 7) & 1;
355 portman_write_data(pm, 1); /* Cause rising edge, which shifts data. */
356 portman_write_data(pm, 0); /* Return data clock low. */
357
358
359 /* De-assert Strobe and return data. */
360 portman_write_command(pm, cmdout); /* Output saved address+IE. */
361
362 /* Wait for strobe echo. */
363 while ((portman_read_status(pm) & ESTB) == ESTB)
364 cpu_relax();
365
366 return (midi_data & 255); /* Shift back and return value. */
367 }
368
369 /*
370 * Checks if any input data on the given channel is available
371 * Checks RxAvail
372 */
373 static int portman_data_avail(struct portman *pm, int channel)
374 {
375 int command = INT_EN;
376 switch (channel) {
377 case 0:
378 command |= RXDATA0;
379 break;
380 case 1:
381 command |= RXDATA1;
382 break;
383 }
384 /* Write hardware (assumme STROBE=0) */
385 portman_write_command(pm, command);
386 /* Check multiplexed RxAvail signal */
387 if ((portman_read_status(pm) & RXAVAIL) == RXAVAIL)
388 return 1; /* Data available */
389
390 /* No Data available */
391 return 0;
392 }
393
394
395 /*
396 * Flushes any input
397 */
398 static void portman_flush_input(struct portman *pm, unsigned char port)
399 {
400 /* Local variable for counting things */
401 unsigned int i = 0;
402 unsigned char command = 0;
403
404 switch (port) {
405 case 0:
406 command = RXDATA0;
407 break;
408 case 1:
409 command = RXDATA1;
410 break;
411 default:
412 snd_printk(KERN_WARNING
413 "portman_flush_input() Won't flush port %i\n",
414 port);
415 return;
416 }
417
418 /* Set address for specified channel in port and allow to settle. */
419 portman_write_command(pm, command);
420
421 /* Assert the Strobe and wait for echo back. */
422 portman_write_command(pm, command | STROBE);
423
424 /* Wait for ESTB */
425 while ((portman_read_status(pm) & ESTB) == 0)
426 cpu_relax();
427
428 /* Output clock cycles to the Rx circuitry. */
429 portman_write_data(pm, 0);
430
431 /* Flush 250 bits... */
432 for (i = 0; i < 250; i++) {
433 portman_write_data(pm, 1);
434 portman_write_data(pm, 0);
435 }
436
437 /* Deassert the Strobe signal of the port and wait for it to settle. */
438 portman_write_command(pm, command | INT_EN);
439
440 /* Wait for settling */
441 while ((portman_read_status(pm) & ESTB) == ESTB)
442 cpu_relax();
443 }
444
445 static int portman_probe(struct parport *p)
446 {
447 /* Initialize the parallel port data register. Will set Rx clocks
448 * low in case we happen to be addressing the Rx ports at this time.
449 */
450 /* 1 */
451 parport_write_data(p, 0);
452
453 /* Initialize the parallel port command register, thus initializing
454 * hardware handshake lines to midi box:
455 *
456 * Strobe = 0
457 * Interrupt Enable = 0
458 */
459 /* 2 */
460 parport_write_control(p, 0);
461
462 /* Check if Portman PC/P 2x4 is out there. */
463 /* 3 */
464 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */
465
466 /* Check for ESTB to be clear */
467 /* 4 */
468 if ((parport_read_status(p) & ESTB) == ESTB)
469 return 1; /* CODE 1 - Strobe Failure. */
470
471 /* Set for RXDATA0 where no damage will be done. */
472 /* 5 */
473 parport_write_control(p, RXDATA0 + STROBE); /* Write Strobe=1 to command reg. */
474
475 /* 6 */
476 if ((parport_read_status(p) & ESTB) != ESTB)
477 return 1; /* CODE 1 - Strobe Failure. */
478
479 /* 7 */
480 parport_write_control(p, 0); /* Reset Strobe=0. */
481
482 /* Check if Tx circuitry is functioning properly. If initialized
483 * unit TxEmpty is false, send out char and see if if goes true.
484 */
485 /* 8 */
486 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */
487
488 /* If PCP channel's TxEmpty is set (TxEmpty is read through the PP
489 * Status Register), then go write data. Else go back and wait.
490 */
491 /* 9 */
492 if ((parport_read_status(p) & TXEMPTY) == 0)
493 return 2;
494
495 /* Return OK status. */
496 return 0;
497 }
498
499 static int portman_device_init(struct portman *pm)
500 {
501 portman_flush_input(pm, 0);
502 portman_flush_input(pm, 1);
503
504 return 0;
505 }
506
507 /*********************************************************************
508 * Rawmidi
509 *********************************************************************/
510 static int snd_portman_midi_open(struct snd_rawmidi_substream *substream)
511 {
512 return 0;
513 }
514
515 static int snd_portman_midi_close(struct snd_rawmidi_substream *substream)
516 {
517 return 0;
518 }
519
520 static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream,
521 int up)
522 {
523 struct portman *pm = substream->rmidi->private_data;
524 unsigned long flags;
525
526 spin_lock_irqsave(&pm->reg_lock, flags);
527 if (up)
528 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED;
529 else
530 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED;
531 spin_unlock_irqrestore(&pm->reg_lock, flags);
532 }
533
534 static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream,
535 int up)
536 {
537 struct portman *pm = substream->rmidi->private_data;
538 unsigned long flags;
539 unsigned char byte;
540
541 spin_lock_irqsave(&pm->reg_lock, flags);
542 if (up) {
543 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1))
544 portman_write_midi(pm, substream->number, byte);
545 }
546 spin_unlock_irqrestore(&pm->reg_lock, flags);
547 }
548
549 static struct snd_rawmidi_ops snd_portman_midi_output = {
550 .open = snd_portman_midi_open,
551 .close = snd_portman_midi_close,
552 .trigger = snd_portman_midi_output_trigger,
553 };
554
555 static struct snd_rawmidi_ops snd_portman_midi_input = {
556 .open = snd_portman_midi_open,
557 .close = snd_portman_midi_close,
558 .trigger = snd_portman_midi_input_trigger,
559 };
560
561 /* Create and initialize the rawmidi component */
562 static int __devinit snd_portman_rawmidi_create(struct snd_card *card)
563 {
564 struct portman *pm = card->private_data;
565 struct snd_rawmidi *rmidi;
566 struct snd_rawmidi_substream *substream;
567 int err;
568
569 err = snd_rawmidi_new(card, CARD_NAME, 0,
570 PORTMAN_NUM_OUTPUT_PORTS,
571 PORTMAN_NUM_INPUT_PORTS,
572 &rmidi);
573 if (err < 0)
574 return err;
575
576 rmidi->private_data = pm;
577 strcpy(rmidi->name, CARD_NAME);
578 rmidi->info_flags = SNDRV_RAWMIDI_INFO_OUTPUT |
579 SNDRV_RAWMIDI_INFO_INPUT |
580 SNDRV_RAWMIDI_INFO_DUPLEX;
581
582 pm->rmidi = rmidi;
583
584 /* register rawmidi ops */
585 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT,
586 &snd_portman_midi_output);
587 snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT,
588 &snd_portman_midi_input);
589
590 /* name substreams */
591 /* output */
592 list_for_each_entry(substream,
593 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
594 list) {
595 sprintf(substream->name,
596 "Portman2x4 %d", substream->number+1);
597 }
598 /* input */
599 list_for_each_entry(substream,
600 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
601 list) {
602 pm->midi_input[substream->number] = substream;
603 sprintf(substream->name,
604 "Portman2x4 %d", substream->number+1);
605 }
606
607 return err;
608 }
609
610 /*********************************************************************
611 * parport stuff
612 *********************************************************************/
613 static void snd_portman_interrupt(void *userdata)
614 {
615 unsigned char midivalue = 0;
616 struct portman *pm = ((struct snd_card*)userdata)->private_data;
617
618 spin_lock(&pm->reg_lock);
619
620 /* While any input data is waiting */
621 while ((portman_read_status(pm) & INT_REQ) == INT_REQ) {
622 /* If data available on channel 0,
623 read it and stuff it into the queue. */
624 if (portman_data_avail(pm, 0)) {
625 /* Read Midi */
626 midivalue = portman_read_midi(pm, 0);
627 /* put midi into queue... */
628 if (pm->mode[0] & PORTMAN2X4_MODE_INPUT_TRIGGERED)
629 snd_rawmidi_receive(pm->midi_input[0],
630 &midivalue, 1);
631
632 }
633 /* If data available on channel 1,
634 read it and stuff it into the queue. */
635 if (portman_data_avail(pm, 1)) {
636 /* Read Midi */
637 midivalue = portman_read_midi(pm, 1);
638 /* put midi into queue... */
639 if (pm->mode[1] & PORTMAN2X4_MODE_INPUT_TRIGGERED)
640 snd_rawmidi_receive(pm->midi_input[1],
641 &midivalue, 1);
642 }
643
644 }
645
646 spin_unlock(&pm->reg_lock);
647 }
648
649 static int __devinit snd_portman_probe_port(struct parport *p)
650 {
651 struct pardevice *pardev;
652 int res;
653
654 pardev = parport_register_device(p, DRIVER_NAME,
655 NULL, NULL, NULL,
656 0, NULL);
657 if (!pardev)
658 return -EIO;
659
660 if (parport_claim(pardev)) {
661 parport_unregister_device(pardev);
662 return -EIO;
663 }
664
665 res = portman_probe(p);
666
667 parport_release(pardev);
668 parport_unregister_device(pardev);
669
670 return res ? -EIO : 0;
671 }
672
673 static void __devinit snd_portman_attach(struct parport *p)
674 {
675 struct platform_device *device;
676
677 device = platform_device_alloc(PLATFORM_DRIVER, device_count);
678 if (!device)
679 return;
680
681 /* Temporary assignment to forward the parport */
682 platform_set_drvdata(device, p);
683
684 if (platform_device_add(device) < 0) {
685 platform_device_put(device);
686 return;
687 }
688
689 /* Since we dont get the return value of probe
690 * We need to check if device probing succeeded or not */
691 if (!platform_get_drvdata(device)) {
692 platform_device_unregister(device);
693 return;
694 }
695
696 /* register device in global table */
697 platform_devices[device_count] = device;
698 device_count++;
699 }
700
701 static void snd_portman_detach(struct parport *p)
702 {
703 /* nothing to do here */
704 }
705
706 static struct parport_driver portman_parport_driver = {
707 .name = "portman2x4",
708 .attach = snd_portman_attach,
709 .detach = snd_portman_detach
710 };
711
712 /*********************************************************************
713 * platform stuff
714 *********************************************************************/
715 static void snd_portman_card_private_free(struct snd_card *card)
716 {
717 struct portman *pm = card->private_data;
718 struct pardevice *pardev = pm->pardev;
719
720 if (pardev) {
721 if (pm->pardev_claimed)
722 parport_release(pardev);
723 parport_unregister_device(pardev);
724 }
725
726 portman_free(pm);
727 }
728
729 static int __devinit snd_portman_probe(struct platform_device *pdev)
730 {
731 struct pardevice *pardev;
732 struct parport *p;
733 int dev = pdev->id;
734 struct snd_card *card = NULL;
735 struct portman *pm = NULL;
736 int err;
737
738 p = platform_get_drvdata(pdev);
739 platform_set_drvdata(pdev, NULL);
740
741 if (dev >= SNDRV_CARDS)
742 return -ENODEV;
743 if (!enable[dev])
744 return -ENOENT;
745
746 if ((err = snd_portman_probe_port(p)) < 0)
747 return err;
748
749 err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
750 if (err < 0) {
751 snd_printd("Cannot create card\n");
752 return err;
753 }
754 strcpy(card->driver, DRIVER_NAME);
755 strcpy(card->shortname, CARD_NAME);
756 sprintf(card->longname, "%s at 0x%lx, irq %i",
757 card->shortname, p->base, p->irq);
758
759 pardev = parport_register_device(p, /* port */
760 DRIVER_NAME, /* name */
761 NULL, /* preempt */
762 NULL, /* wakeup */
763 snd_portman_interrupt, /* ISR */
764 PARPORT_DEV_EXCL, /* flags */
765 (void *)card); /* private */
766 if (pardev == NULL) {
767 snd_printd("Cannot register pardevice\n");
768 err = -EIO;
769 goto __err;
770 }
771
772 if ((err = portman_create(card, pardev, &pm)) < 0) {
773 snd_printd("Cannot create main component\n");
774 parport_unregister_device(pardev);
775 goto __err;
776 }
777 card->private_data = pm;
778 card->private_free = snd_portman_card_private_free;
779
780 if ((err = snd_portman_rawmidi_create(card)) < 0) {
781 snd_printd("Creating Rawmidi component failed\n");
782 goto __err;
783 }
784
785 /* claim parport */
786 if (parport_claim(pardev)) {
787 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
788 err = -EIO;
789 goto __err;
790 }
791 pm->pardev_claimed = 1;
792
793 /* init device */
794 if ((err = portman_device_init(pm)) < 0)
795 goto __err;
796
797 platform_set_drvdata(pdev, card);
798
799 snd_card_set_dev(card, &pdev->dev);
800
801 /* At this point card will be usable */
802 if ((err = snd_card_register(card)) < 0) {
803 snd_printd("Cannot register card\n");
804 goto __err;
805 }
806
807 snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base);
808 return 0;
809
810 __err:
811 snd_card_free(card);
812 return err;
813 }
814
815 static int __devexit snd_portman_remove(struct platform_device *pdev)
816 {
817 struct snd_card *card = platform_get_drvdata(pdev);
818
819 if (card)
820 snd_card_free(card);
821
822 return 0;
823 }
824
825
826 static struct platform_driver snd_portman_driver = {
827 .probe = snd_portman_probe,
828 .remove = __devexit_p(snd_portman_remove),
829 .driver = {
830 .name = PLATFORM_DRIVER
831 }
832 };
833
834 /*********************************************************************
835 * module init stuff
836 *********************************************************************/
837 static void snd_portman_unregister_all(void)
838 {
839 int i;
840
841 for (i = 0; i < SNDRV_CARDS; ++i) {
842 if (platform_devices[i]) {
843 platform_device_unregister(platform_devices[i]);
844 platform_devices[i] = NULL;
845 }
846 }
847 platform_driver_unregister(&snd_portman_driver);
848 parport_unregister_driver(&portman_parport_driver);
849 }
850
851 static int __init snd_portman_module_init(void)
852 {
853 int err;
854
855 if ((err = platform_driver_register(&snd_portman_driver)) < 0)
856 return err;
857
858 if (parport_register_driver(&portman_parport_driver) != 0) {
859 platform_driver_unregister(&snd_portman_driver);
860 return -EIO;
861 }
862
863 if (device_count == 0) {
864 snd_portman_unregister_all();
865 return -ENODEV;
866 }
867
868 return 0;
869 }
870
871 static void __exit snd_portman_module_exit(void)
872 {
873 snd_portman_unregister_all();
874 }
875
876 module_init(snd_portman_module_init);
877 module_exit(snd_portman_module_exit);
Linux with added FPC-III support