2 * Driver for Midiman Portman2x4 parallel port midi interface
4 * Copyright (c) by Levent Guendogdu <levon@feature-it.com>
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.
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.
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.
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
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 <linux/slab.h>
46 #include <linux/module.h>
47 #include <sound/core.h>
48 #include <sound/initval.h>
49 #include <sound/rawmidi.h>
50 #include <sound/control.h>
52 #define CARD_NAME "Portman 2x4"
53 #define DRIVER_NAME "portman"
54 #define PLATFORM_DRIVER "snd_portman2x4"
56 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
57 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
58 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
60 static struct platform_device *platform_devices[SNDRV_CARDS];
61 static int device_count;
63 module_param_array(index, int, NULL, S_IRUGO);
64 MODULE_PARM_DESC(index, "Index value for " CARD_NAME " soundcard.");
65 module_param_array(id, charp, NULL, S_IRUGO);
66 MODULE_PARM_DESC(id, "ID string for " CARD_NAME " soundcard.");
67 module_param_array(enable, bool, NULL, S_IRUGO);
68 MODULE_PARM_DESC(enable, "Enable " CARD_NAME " soundcard.");
70 MODULE_AUTHOR("Levent Guendogdu, Tobias Gehrig, Matthias Koenig");
71 MODULE_DESCRIPTION("Midiman Portman2x4");
72 MODULE_LICENSE("GPL");
73 MODULE_SUPPORTED_DEVICE("{{Midiman,Portman2x4}}");
75 /*********************************************************************
77 *********************************************************************/
78 #define PORTMAN_NUM_INPUT_PORTS 2
79 #define PORTMAN_NUM_OUTPUT_PORTS 4
83 struct snd_card *card;
84 struct snd_rawmidi *rmidi;
85 struct pardevice *pardev;
87 int mode[PORTMAN_NUM_INPUT_PORTS];
88 struct snd_rawmidi_substream *midi_input[PORTMAN_NUM_INPUT_PORTS];
91 static int portman_free(struct portman *pm)
97 static int portman_create(struct snd_card *card,
98 struct pardevice *pardev,
99 struct portman **rchip)
105 pm = kzalloc(sizeof(struct portman), GFP_KERNEL);
109 /* Init chip specific data */
110 spin_lock_init(&pm->reg_lock);
119 /*********************************************************************
120 * HW related constants
121 *********************************************************************/
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. */
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. */
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. */
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.
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. */
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. */
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:
165 * SELECT LINE: A3 A2 A1
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 */
177 /* BUSY LINE: A3 A2 A1
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 */
189 #define PORTMAN2X4_MODE_INPUT_TRIGGERED 0x01
191 /*********************************************************************
192 * Hardware specific functions
193 *********************************************************************/
194 static inline void portman_write_command(struct portman *pm, u8 value)
196 parport_write_control(pm->pardev->port, value);
199 static inline u8 portman_read_command(struct portman *pm)
201 return parport_read_control(pm->pardev->port);
204 static inline u8 portman_read_status(struct portman *pm)
206 return parport_read_status(pm->pardev->port);
209 static inline u8 portman_read_data(struct portman *pm)
211 return parport_read_data(pm->pardev->port);
214 static inline void portman_write_data(struct portman *pm, u8 value)
216 parport_write_data(pm->pardev->port, value);
219 static void portman_write_midi(struct portman *pm,
220 int port, u8 mididata)
222 int command = ((port + 4) << 1);
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).
229 * command = TXDATA0 | INT_EN;
230 * Align port num with address field (b1...b3),
231 * set address for TXDatax, Strobe=0
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.
241 portman_write_command(pm, command);
243 /* While the address lines settle, write parallel output data to
244 * PP Data Reg. This has no effect until Strobe signal is asserted.
247 portman_write_data(pm, mididata);
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.
252 } while ((portman_read_status(pm) & TXEMPTY) != TXEMPTY);
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.
259 portman_write_command(pm, command | STROBE);
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
266 while ((portman_read_status(pm) & ESTB) == 0)
269 /* Release strobe and immediately re-allow interrupts. */
270 portman_write_command(pm, command);
272 while ((portman_read_status(pm) & ESTB) == ESTB)
275 /* PC/P BUSY is now set. We must wait until BUSY resets itself.
276 * We'll reenable ints while we're waiting.
279 while ((portman_read_status(pm) & BUSY) == BUSY)
287 * Read MIDI byte from port
288 * Attempt to read input byte from specified hardware input port (0..).
289 * Return -1 if no data
291 static int portman_read_midi(struct portman *pm, int port)
293 unsigned char midi_data = 0;
294 unsigned char cmdout; /* Saved address+IE bit. */
296 /* Make sure clocking edge is down before starting... */
297 portman_write_data(pm, 0); /* Make sure edge is down. */
299 /* Set destination address to PCP. */
300 cmdout = (port << 1) | INT_EN; /* Address + IE + No Strobe. */
301 portman_write_command(pm, cmdout);
303 while ((portman_read_status(pm) & ESTB) == ESTB)
304 cpu_relax(); /* Wait for strobe echo. */
306 /* After the address lines settle, check multiplexed RxAvail signal.
307 * If data is available, read it.
309 if ((portman_read_status(pm) & RXAVAIL) == 0)
310 return -1; /* No data. */
312 /* Set the Strobe signal to enable the Rx clocking circuitry. */
313 portman_write_command(pm, cmdout | STROBE); /* Write address+IE+Strobe. */
315 while ((portman_read_status(pm) & ESTB) == 0)
316 cpu_relax(); /* Wait for strobe echo. */
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. */
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. */
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. */
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. */
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. */
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. */
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. */
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. */
359 /* De-assert Strobe and return data. */
360 portman_write_command(pm, cmdout); /* Output saved address+IE. */
362 /* Wait for strobe echo. */
363 while ((portman_read_status(pm) & ESTB) == ESTB)
366 return (midi_data & 255); /* Shift back and return value. */
370 * Checks if any input data on the given channel is available
373 static int portman_data_avail(struct portman *pm, int channel)
375 int command = INT_EN;
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 */
390 /* No Data available */
398 static void portman_flush_input(struct portman *pm, unsigned char port)
400 /* Local variable for counting things */
402 unsigned char command = 0;
412 snd_printk(KERN_WARNING
413 "portman_flush_input() Won't flush port %i\n",
418 /* Set address for specified channel in port and allow to settle. */
419 portman_write_command(pm, command);
421 /* Assert the Strobe and wait for echo back. */
422 portman_write_command(pm, command | STROBE);
425 while ((portman_read_status(pm) & ESTB) == 0)
428 /* Output clock cycles to the Rx circuitry. */
429 portman_write_data(pm, 0);
431 /* Flush 250 bits... */
432 for (i = 0; i < 250; i++) {
433 portman_write_data(pm, 1);
434 portman_write_data(pm, 0);
437 /* Deassert the Strobe signal of the port and wait for it to settle. */
438 portman_write_command(pm, command | INT_EN);
440 /* Wait for settling */
441 while ((portman_read_status(pm) & ESTB) == ESTB)
445 static int portman_probe(struct parport *p)
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.
451 parport_write_data(p, 0);
453 /* Initialize the parallel port command register, thus initializing
454 * hardware handshake lines to midi box:
457 * Interrupt Enable = 0
460 parport_write_control(p, 0);
462 /* Check if Portman PC/P 2x4 is out there. */
464 parport_write_control(p, RXDATA0); /* Write Strobe=0 to command reg. */
466 /* Check for ESTB to be clear */
468 if ((parport_read_status(p) & ESTB) == ESTB)
469 return 1; /* CODE 1 - Strobe Failure. */
471 /* Set for RXDATA0 where no damage will be done. */
473 parport_write_control(p, RXDATA0 + STROBE); /* Write Strobe=1 to command reg. */
476 if ((parport_read_status(p) & ESTB) != ESTB)
477 return 1; /* CODE 1 - Strobe Failure. */
480 parport_write_control(p, 0); /* Reset Strobe=0. */
482 /* Check if Tx circuitry is functioning properly. If initialized
483 * unit TxEmpty is false, send out char and see if if goes true.
486 parport_write_control(p, TXDATA0); /* Tx channel 0, strobe off. */
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.
492 if ((parport_read_status(p) & TXEMPTY) == 0)
495 /* Return OK status. */
499 static int portman_device_init(struct portman *pm)
501 portman_flush_input(pm, 0);
502 portman_flush_input(pm, 1);
507 /*********************************************************************
509 *********************************************************************/
510 static int snd_portman_midi_open(struct snd_rawmidi_substream *substream)
515 static int snd_portman_midi_close(struct snd_rawmidi_substream *substream)
520 static void snd_portman_midi_input_trigger(struct snd_rawmidi_substream *substream,
523 struct portman *pm = substream->rmidi->private_data;
526 spin_lock_irqsave(&pm->reg_lock, flags);
528 pm->mode[substream->number] |= PORTMAN2X4_MODE_INPUT_TRIGGERED;
530 pm->mode[substream->number] &= ~PORTMAN2X4_MODE_INPUT_TRIGGERED;
531 spin_unlock_irqrestore(&pm->reg_lock, flags);
534 static void snd_portman_midi_output_trigger(struct snd_rawmidi_substream *substream,
537 struct portman *pm = substream->rmidi->private_data;
541 spin_lock_irqsave(&pm->reg_lock, flags);
543 while ((snd_rawmidi_transmit(substream, &byte, 1) == 1))
544 portman_write_midi(pm, substream->number, byte);
546 spin_unlock_irqrestore(&pm->reg_lock, flags);
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,
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,
561 /* Create and initialize the rawmidi component */
562 static int snd_portman_rawmidi_create(struct snd_card *card)
564 struct portman *pm = card->private_data;
565 struct snd_rawmidi *rmidi;
566 struct snd_rawmidi_substream *substream;
569 err = snd_rawmidi_new(card, CARD_NAME, 0,
570 PORTMAN_NUM_OUTPUT_PORTS,
571 PORTMAN_NUM_INPUT_PORTS,
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;
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);
590 /* name substreams */
592 list_for_each_entry(substream,
593 &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams,
595 sprintf(substream->name,
596 "Portman2x4 %d", substream->number+1);
599 list_for_each_entry(substream,
600 &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams,
602 pm->midi_input[substream->number] = substream;
603 sprintf(substream->name,
604 "Portman2x4 %d", substream->number+1);
610 /*********************************************************************
612 *********************************************************************/
613 static void snd_portman_interrupt(void *userdata)
615 unsigned char midivalue = 0;
616 struct portman *pm = ((struct snd_card*)userdata)->private_data;
618 spin_lock(&pm->reg_lock);
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)) {
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],
633 /* If data available on channel 1,
634 read it and stuff it into the queue. */
635 if (portman_data_avail(pm, 1)) {
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],
646 spin_unlock(&pm->reg_lock);
649 static void snd_portman_attach(struct parport *p)
651 struct platform_device *device;
653 device = platform_device_alloc(PLATFORM_DRIVER, device_count);
657 /* Temporary assignment to forward the parport */
658 platform_set_drvdata(device, p);
660 if (platform_device_add(device) < 0) {
661 platform_device_put(device);
665 /* Since we dont get the return value of probe
666 * We need to check if device probing succeeded or not */
667 if (!platform_get_drvdata(device)) {
668 platform_device_unregister(device);
672 /* register device in global table */
673 platform_devices[device_count] = device;
677 static void snd_portman_detach(struct parport *p)
679 /* nothing to do here */
682 static int snd_portman_dev_probe(struct pardevice *pardev)
684 if (strcmp(pardev->name, DRIVER_NAME))
690 static struct parport_driver portman_parport_driver = {
691 .name = "portman2x4",
692 .probe = snd_portman_dev_probe,
693 .match_port = snd_portman_attach,
694 .detach = snd_portman_detach,
698 /*********************************************************************
700 *********************************************************************/
701 static void snd_portman_card_private_free(struct snd_card *card)
703 struct portman *pm = card->private_data;
704 struct pardevice *pardev = pm->pardev;
707 parport_release(pardev);
708 parport_unregister_device(pardev);
714 static int snd_portman_probe(struct platform_device *pdev)
716 struct pardevice *pardev;
719 struct snd_card *card = NULL;
720 struct portman *pm = NULL;
722 struct pardev_cb portman_cb = {
725 .irq_func = snd_portman_interrupt, /* ISR */
726 .flags = PARPORT_DEV_EXCL, /* flags */
729 p = platform_get_drvdata(pdev);
730 platform_set_drvdata(pdev, NULL);
732 if (dev >= SNDRV_CARDS)
737 err = snd_card_new(&pdev->dev, index[dev], id[dev], THIS_MODULE,
740 snd_printd("Cannot create card\n");
743 strcpy(card->driver, DRIVER_NAME);
744 strcpy(card->shortname, CARD_NAME);
745 sprintf(card->longname, "%s at 0x%lx, irq %i",
746 card->shortname, p->base, p->irq);
748 portman_cb.private = card; /* private */
749 pardev = parport_register_dev_model(p, /* port */
750 DRIVER_NAME, /* name */
751 &portman_cb, /* callbacks */
752 pdev->id); /* device number */
753 if (pardev == NULL) {
754 snd_printd("Cannot register pardevice\n");
760 if (parport_claim(pardev)) {
761 snd_printd("Cannot claim parport 0x%lx\n", pardev->port->base);
766 if ((err = portman_create(card, pardev, &pm)) < 0) {
767 snd_printd("Cannot create main component\n");
770 card->private_data = pm;
771 card->private_free = snd_portman_card_private_free;
773 err = portman_probe(p);
779 if ((err = snd_portman_rawmidi_create(card)) < 0) {
780 snd_printd("Creating Rawmidi component failed\n");
785 if ((err = portman_device_init(pm)) < 0)
788 platform_set_drvdata(pdev, card);
790 /* At this point card will be usable */
791 if ((err = snd_card_register(card)) < 0) {
792 snd_printd("Cannot register card\n");
796 snd_printk(KERN_INFO "Portman 2x4 on 0x%lx\n", p->base);
800 parport_release(pardev);
802 parport_unregister_device(pardev);
808 static int snd_portman_remove(struct platform_device *pdev)
810 struct snd_card *card = platform_get_drvdata(pdev);
819 static struct platform_driver snd_portman_driver = {
820 .probe = snd_portman_probe,
821 .remove = snd_portman_remove,
823 .name = PLATFORM_DRIVER,
827 /*********************************************************************
829 *********************************************************************/
830 static void snd_portman_unregister_all(void)
834 for (i = 0; i < SNDRV_CARDS; ++i) {
835 if (platform_devices[i]) {
836 platform_device_unregister(platform_devices[i]);
837 platform_devices[i] = NULL;
840 platform_driver_unregister(&snd_portman_driver);
841 parport_unregister_driver(&portman_parport_driver);
844 static int __init snd_portman_module_init(void)
848 if ((err = platform_driver_register(&snd_portman_driver)) < 0)
851 if (parport_register_driver(&portman_parport_driver) != 0) {
852 platform_driver_unregister(&snd_portman_driver);
856 if (device_count == 0) {
857 snd_portman_unregister_all();
864 static void __exit snd_portman_module_exit(void)
866 snd_portman_unregister_all();
869 module_init(snd_portman_module_init);
870 module_exit(snd_portman_module_exit);