xref: /openbmc/linux/sound/isa/sscape.c (revision ca79522c)
1 /*
2  *   Low-level ALSA driver for the ENSONIQ SoundScape
3  *   Copyright (c) by Chris Rankin
4  *
5  *   This driver was written in part using information obtained from
6  *   the OSS/Free SoundScape driver, written by Hannu Savolainen.
7  *
8  *
9  *   This program is free software; you can redistribute it and/or modify
10  *   it under the terms of the GNU General Public License as published by
11  *   the Free Software Foundation; either version 2 of the License, or
12  *   (at your option) any later version.
13  *
14  *   This program is distributed in the hope that it will be useful,
15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  *   GNU General Public License for more details.
18  *
19  *   You should have received a copy of the GNU General Public License
20  *   along with this program; if not, write to the Free Software
21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
22  */
23 
24 #include <linux/init.h>
25 #include <linux/err.h>
26 #include <linux/isa.h>
27 #include <linux/delay.h>
28 #include <linux/firmware.h>
29 #include <linux/pnp.h>
30 #include <linux/spinlock.h>
31 #include <linux/module.h>
32 #include <asm/dma.h>
33 #include <sound/core.h>
34 #include <sound/wss.h>
35 #include <sound/mpu401.h>
36 #include <sound/initval.h>
37 
38 
39 MODULE_AUTHOR("Chris Rankin");
40 MODULE_DESCRIPTION("ENSONIQ SoundScape driver");
41 MODULE_LICENSE("GPL");
42 MODULE_FIRMWARE("sndscape.co0");
43 MODULE_FIRMWARE("sndscape.co1");
44 MODULE_FIRMWARE("sndscape.co2");
45 MODULE_FIRMWARE("sndscape.co3");
46 MODULE_FIRMWARE("sndscape.co4");
47 MODULE_FIRMWARE("scope.cod");
48 
49 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
50 static char* id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
51 static long port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
52 static long wss_port[SNDRV_CARDS] = SNDRV_DEFAULT_PORT;
53 static int irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
54 static int mpu_irq[SNDRV_CARDS] = SNDRV_DEFAULT_IRQ;
55 static int dma[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
56 static int dma2[SNDRV_CARDS] = SNDRV_DEFAULT_DMA;
57 static bool joystick[SNDRV_CARDS];
58 
59 module_param_array(index, int, NULL, 0444);
60 MODULE_PARM_DESC(index, "Index number for SoundScape soundcard");
61 
62 module_param_array(id, charp, NULL, 0444);
63 MODULE_PARM_DESC(id, "Description for SoundScape card");
64 
65 module_param_array(port, long, NULL, 0444);
66 MODULE_PARM_DESC(port, "Port # for SoundScape driver.");
67 
68 module_param_array(wss_port, long, NULL, 0444);
69 MODULE_PARM_DESC(wss_port, "WSS Port # for SoundScape driver.");
70 
71 module_param_array(irq, int, NULL, 0444);
72 MODULE_PARM_DESC(irq, "IRQ # for SoundScape driver.");
73 
74 module_param_array(mpu_irq, int, NULL, 0444);
75 MODULE_PARM_DESC(mpu_irq, "MPU401 IRQ # for SoundScape driver.");
76 
77 module_param_array(dma, int, NULL, 0444);
78 MODULE_PARM_DESC(dma, "DMA # for SoundScape driver.");
79 
80 module_param_array(dma2, int, NULL, 0444);
81 MODULE_PARM_DESC(dma2, "DMA2 # for SoundScape driver.");
82 
83 module_param_array(joystick, bool, NULL, 0444);
84 MODULE_PARM_DESC(joystick, "Enable gameport.");
85 
86 #ifdef CONFIG_PNP
87 static int isa_registered;
88 static int pnp_registered;
89 
90 static struct pnp_card_device_id sscape_pnpids[] = {
91 	{ .id = "ENS3081", .devs = { { "ENS0000" } } }, /* Soundscape PnP */
92 	{ .id = "ENS4081", .devs = { { "ENS1011" } } },	/* VIVO90 */
93 	{ .id = "" }	/* end */
94 };
95 
96 MODULE_DEVICE_TABLE(pnp_card, sscape_pnpids);
97 #endif
98 
99 
100 #define HOST_CTRL_IO(i)  ((i) + 2)
101 #define HOST_DATA_IO(i)  ((i) + 3)
102 #define ODIE_ADDR_IO(i)  ((i) + 4)
103 #define ODIE_DATA_IO(i)  ((i) + 5)
104 #define CODEC_IO(i)      ((i) + 8)
105 
106 #define IC_ODIE  1
107 #define IC_OPUS  2
108 
109 #define RX_READY 0x01
110 #define TX_READY 0x02
111 
112 #define CMD_ACK			0x80
113 #define CMD_SET_MIDI_VOL	0x84
114 #define CMD_GET_MIDI_VOL	0x85
115 #define CMD_XXX_MIDI_VOL	0x86
116 #define CMD_SET_EXTMIDI		0x8a
117 #define CMD_GET_EXTMIDI		0x8b
118 #define CMD_SET_MT32		0x8c
119 #define CMD_GET_MT32		0x8d
120 
121 enum GA_REG {
122 	GA_INTSTAT_REG = 0,
123 	GA_INTENA_REG,
124 	GA_DMAA_REG,
125 	GA_DMAB_REG,
126 	GA_INTCFG_REG,
127 	GA_DMACFG_REG,
128 	GA_CDCFG_REG,
129 	GA_SMCFGA_REG,
130 	GA_SMCFGB_REG,
131 	GA_HMCTL_REG
132 };
133 
134 #define DMA_8BIT  0x80
135 
136 
137 enum card_type {
138 	MEDIA_FX,	/* Sequoia S-1000 */
139 	SSCAPE,		/* Sequoia S-2000 */
140 	SSCAPE_PNP,
141 	SSCAPE_VIVO,
142 };
143 
144 struct soundscape {
145 	spinlock_t lock;
146 	unsigned io_base;
147 	int ic_type;
148 	enum card_type type;
149 	struct resource *io_res;
150 	struct resource *wss_res;
151 	struct snd_wss *chip;
152 
153 	unsigned char midi_vol;
154 };
155 
156 #define INVALID_IRQ  ((unsigned)-1)
157 
158 
159 static inline struct soundscape *get_card_soundscape(struct snd_card *c)
160 {
161 	return (struct soundscape *) (c->private_data);
162 }
163 
164 /*
165  * Allocates some kernel memory that we can use for DMA.
166  * I think this means that the memory has to map to
167  * contiguous pages of physical memory.
168  */
169 static struct snd_dma_buffer *get_dmabuf(struct snd_dma_buffer *buf,
170 					 unsigned long size)
171 {
172 	if (buf) {
173 		if (snd_dma_alloc_pages_fallback(SNDRV_DMA_TYPE_DEV,
174 						 snd_dma_isa_data(),
175 						 size, buf) < 0) {
176 			snd_printk(KERN_ERR "sscape: Failed to allocate "
177 					    "%lu bytes for DMA\n",
178 					    size);
179 			return NULL;
180 		}
181 	}
182 
183 	return buf;
184 }
185 
186 /*
187  * Release the DMA-able kernel memory ...
188  */
189 static void free_dmabuf(struct snd_dma_buffer *buf)
190 {
191 	if (buf && buf->area)
192 		snd_dma_free_pages(buf);
193 }
194 
195 /*
196  * This function writes to the SoundScape's control registers,
197  * but doesn't do any locking. It's up to the caller to do that.
198  * This is why this function is "unsafe" ...
199  */
200 static inline void sscape_write_unsafe(unsigned io_base, enum GA_REG reg,
201 				       unsigned char val)
202 {
203 	outb(reg, ODIE_ADDR_IO(io_base));
204 	outb(val, ODIE_DATA_IO(io_base));
205 }
206 
207 /*
208  * Write to the SoundScape's control registers, and do the
209  * necessary locking ...
210  */
211 static void sscape_write(struct soundscape *s, enum GA_REG reg,
212 			 unsigned char val)
213 {
214 	unsigned long flags;
215 
216 	spin_lock_irqsave(&s->lock, flags);
217 	sscape_write_unsafe(s->io_base, reg, val);
218 	spin_unlock_irqrestore(&s->lock, flags);
219 }
220 
221 /*
222  * Read from the SoundScape's control registers, but leave any
223  * locking to the caller. This is why the function is "unsafe" ...
224  */
225 static inline unsigned char sscape_read_unsafe(unsigned io_base,
226 					       enum GA_REG reg)
227 {
228 	outb(reg, ODIE_ADDR_IO(io_base));
229 	return inb(ODIE_DATA_IO(io_base));
230 }
231 
232 /*
233  * Puts the SoundScape into "host" mode, as compared to "MIDI" mode
234  */
235 static inline void set_host_mode_unsafe(unsigned io_base)
236 {
237 	outb(0x0, HOST_CTRL_IO(io_base));
238 }
239 
240 /*
241  * Puts the SoundScape into "MIDI" mode, as compared to "host" mode
242  */
243 static inline void set_midi_mode_unsafe(unsigned io_base)
244 {
245 	outb(0x3, HOST_CTRL_IO(io_base));
246 }
247 
248 /*
249  * Read the SoundScape's host-mode control register, but leave
250  * any locking issues to the caller ...
251  */
252 static inline int host_read_unsafe(unsigned io_base)
253 {
254 	int data = -1;
255 	if ((inb(HOST_CTRL_IO(io_base)) & RX_READY) != 0)
256 		data = inb(HOST_DATA_IO(io_base));
257 
258 	return data;
259 }
260 
261 /*
262  * Read the SoundScape's host-mode control register, performing
263  * a limited amount of busy-waiting if the register isn't ready.
264  * Also leaves all locking-issues to the caller ...
265  */
266 static int host_read_ctrl_unsafe(unsigned io_base, unsigned timeout)
267 {
268 	int data;
269 
270 	while (((data = host_read_unsafe(io_base)) < 0) && (timeout != 0)) {
271 		udelay(100);
272 		--timeout;
273 	} /* while */
274 
275 	return data;
276 }
277 
278 /*
279  * Write to the SoundScape's host-mode control registers, but
280  * leave any locking issues to the caller ...
281  */
282 static inline int host_write_unsafe(unsigned io_base, unsigned char data)
283 {
284 	if ((inb(HOST_CTRL_IO(io_base)) & TX_READY) != 0) {
285 		outb(data, HOST_DATA_IO(io_base));
286 		return 1;
287 	}
288 
289 	return 0;
290 }
291 
292 /*
293  * Write to the SoundScape's host-mode control registers, performing
294  * a limited amount of busy-waiting if the register isn't ready.
295  * Also leaves all locking-issues to the caller ...
296  */
297 static int host_write_ctrl_unsafe(unsigned io_base, unsigned char data,
298 				  unsigned timeout)
299 {
300 	int err;
301 
302 	while (!(err = host_write_unsafe(io_base, data)) && (timeout != 0)) {
303 		udelay(100);
304 		--timeout;
305 	} /* while */
306 
307 	return err;
308 }
309 
310 
311 /*
312  * Check that the MIDI subsystem is operational. If it isn't,
313  * then we will hang the computer if we try to use it ...
314  *
315  * NOTE: This check is based upon observation, not documentation.
316  */
317 static inline int verify_mpu401(const struct snd_mpu401 *mpu)
318 {
319 	return ((inb(MPU401C(mpu)) & 0xc0) == 0x80);
320 }
321 
322 /*
323  * This is apparently the standard way to initailise an MPU-401
324  */
325 static inline void initialise_mpu401(const struct snd_mpu401 *mpu)
326 {
327 	outb(0, MPU401D(mpu));
328 }
329 
330 /*
331  * Tell the SoundScape to activate the AD1845 chip (I think).
332  * The AD1845 detection fails if we *don't* do this, so I
333  * think that this is a good idea ...
334  */
335 static void activate_ad1845_unsafe(unsigned io_base)
336 {
337 	unsigned char val = sscape_read_unsafe(io_base, GA_HMCTL_REG);
338 	sscape_write_unsafe(io_base, GA_HMCTL_REG, (val & 0xcf) | 0x10);
339 	sscape_write_unsafe(io_base, GA_CDCFG_REG, 0x80);
340 }
341 
342 /*
343  * Do the necessary ALSA-level cleanup to deallocate our driver ...
344  */
345 static void soundscape_free(struct snd_card *c)
346 {
347 	struct soundscape *sscape = get_card_soundscape(c);
348 	release_and_free_resource(sscape->io_res);
349 	release_and_free_resource(sscape->wss_res);
350 	free_dma(sscape->chip->dma1);
351 }
352 
353 /*
354  * Tell the SoundScape to begin a DMA tranfer using the given channel.
355  * All locking issues are left to the caller.
356  */
357 static void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
358 {
359 	sscape_write_unsafe(io_base, reg,
360 			    sscape_read_unsafe(io_base, reg) | 0x01);
361 	sscape_write_unsafe(io_base, reg,
362 			    sscape_read_unsafe(io_base, reg) & 0xfe);
363 }
364 
365 /*
366  * Wait for a DMA transfer to complete. This is a "limited busy-wait",
367  * and all locking issues are left to the caller.
368  */
369 static int sscape_wait_dma_unsafe(unsigned io_base, enum GA_REG reg,
370 				  unsigned timeout)
371 {
372 	while (!(sscape_read_unsafe(io_base, reg) & 0x01) && (timeout != 0)) {
373 		udelay(100);
374 		--timeout;
375 	} /* while */
376 
377 	return sscape_read_unsafe(io_base, reg) & 0x01;
378 }
379 
380 /*
381  * Wait for the On-Board Processor to return its start-up
382  * acknowledgement sequence. This wait is too long for
383  * us to perform "busy-waiting", and so we must sleep.
384  * This in turn means that we must not be holding any
385  * spinlocks when we call this function.
386  */
387 static int obp_startup_ack(struct soundscape *s, unsigned timeout)
388 {
389 	unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
390 
391 	do {
392 		unsigned long flags;
393 		int x;
394 
395 		spin_lock_irqsave(&s->lock, flags);
396 		x = host_read_unsafe(s->io_base);
397 		spin_unlock_irqrestore(&s->lock, flags);
398 		if (x == 0xfe || x == 0xff)
399 			return 1;
400 
401 		msleep(10);
402 	} while (time_before(jiffies, end_time));
403 
404 	return 0;
405 }
406 
407 /*
408  * Wait for the host to return its start-up acknowledgement
409  * sequence. This wait is too long for us to perform
410  * "busy-waiting", and so we must sleep. This in turn means
411  * that we must not be holding any spinlocks when we call
412  * this function.
413  */
414 static int host_startup_ack(struct soundscape *s, unsigned timeout)
415 {
416 	unsigned long end_time = jiffies + msecs_to_jiffies(timeout);
417 
418 	do {
419 		unsigned long flags;
420 		int x;
421 
422 		spin_lock_irqsave(&s->lock, flags);
423 		x = host_read_unsafe(s->io_base);
424 		spin_unlock_irqrestore(&s->lock, flags);
425 		if (x == 0xfe)
426 			return 1;
427 
428 		msleep(10);
429 	} while (time_before(jiffies, end_time));
430 
431 	return 0;
432 }
433 
434 /*
435  * Upload a byte-stream into the SoundScape using DMA channel A.
436  */
437 static int upload_dma_data(struct soundscape *s, const unsigned char *data,
438 			   size_t size)
439 {
440 	unsigned long flags;
441 	struct snd_dma_buffer dma;
442 	int ret;
443 	unsigned char val;
444 
445 	if (!get_dmabuf(&dma, PAGE_ALIGN(32 * 1024)))
446 		return -ENOMEM;
447 
448 	spin_lock_irqsave(&s->lock, flags);
449 
450 	/*
451 	 * Reset the board ...
452 	 */
453 	val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
454 	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val & 0x3f);
455 
456 	/*
457 	 * Enable the DMA channels and configure them ...
458 	 */
459 	val = (s->chip->dma1 << 4) | DMA_8BIT;
460 	sscape_write_unsafe(s->io_base, GA_DMAA_REG, val);
461 	sscape_write_unsafe(s->io_base, GA_DMAB_REG, 0x20);
462 
463 	/*
464 	 * Take the board out of reset ...
465 	 */
466 	val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
467 	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x80);
468 
469 	/*
470 	 * Upload the firmware to the SoundScape
471 	 * board through the DMA channel ...
472 	 */
473 	while (size != 0) {
474 		unsigned long len;
475 
476 		len = min(size, dma.bytes);
477 		memcpy(dma.area, data, len);
478 		data += len;
479 		size -= len;
480 
481 		snd_dma_program(s->chip->dma1, dma.addr, len, DMA_MODE_WRITE);
482 		sscape_start_dma_unsafe(s->io_base, GA_DMAA_REG);
483 		if (!sscape_wait_dma_unsafe(s->io_base, GA_DMAA_REG, 5000)) {
484 			/*
485 			 * Don't forget to release this spinlock we're holding
486 			 */
487 			spin_unlock_irqrestore(&s->lock, flags);
488 
489 			snd_printk(KERN_ERR
490 					"sscape: DMA upload has timed out\n");
491 			ret = -EAGAIN;
492 			goto _release_dma;
493 		}
494 	} /* while */
495 
496 	set_host_mode_unsafe(s->io_base);
497 	outb(0x0, s->io_base);
498 
499 	/*
500 	 * Boot the board ... (I think)
501 	 */
502 	val = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
503 	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, val | 0x40);
504 	spin_unlock_irqrestore(&s->lock, flags);
505 
506 	/*
507 	 * If all has gone well, then the board should acknowledge
508 	 * the new upload and tell us that it has rebooted OK. We
509 	 * give it 5 seconds (max) ...
510 	 */
511 	ret = 0;
512 	if (!obp_startup_ack(s, 5000)) {
513 		snd_printk(KERN_ERR "sscape: No response "
514 				    "from on-board processor after upload\n");
515 		ret = -EAGAIN;
516 	} else if (!host_startup_ack(s, 5000)) {
517 		snd_printk(KERN_ERR
518 				"sscape: SoundScape failed to initialise\n");
519 		ret = -EAGAIN;
520 	}
521 
522 _release_dma:
523 	/*
524 	 * NOTE!!! We are NOT holding any spinlocks at this point !!!
525 	 */
526 	sscape_write(s, GA_DMAA_REG, (s->ic_type == IC_OPUS ? 0x40 : 0x70));
527 	free_dmabuf(&dma);
528 
529 	return ret;
530 }
531 
532 /*
533  * Upload the bootblock(?) into the SoundScape. The only
534  * purpose of this block of code seems to be to tell
535  * us which version of the microcode we should be using.
536  */
537 static int sscape_upload_bootblock(struct snd_card *card)
538 {
539 	struct soundscape *sscape = get_card_soundscape(card);
540 	unsigned long flags;
541 	const struct firmware *init_fw = NULL;
542 	int data = 0;
543 	int ret;
544 
545 	ret = request_firmware(&init_fw, "scope.cod", card->dev);
546 	if (ret < 0) {
547 		snd_printk(KERN_ERR "sscape: Error loading scope.cod");
548 		return ret;
549 	}
550 	ret = upload_dma_data(sscape, init_fw->data, init_fw->size);
551 
552 	release_firmware(init_fw);
553 
554 	spin_lock_irqsave(&sscape->lock, flags);
555 	if (ret == 0)
556 		data = host_read_ctrl_unsafe(sscape->io_base, 100);
557 
558 	if (data & 0x10)
559 		sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2f);
560 
561 	spin_unlock_irqrestore(&sscape->lock, flags);
562 
563 	data &= 0xf;
564 	if (ret == 0 && data > 7) {
565 		snd_printk(KERN_ERR
566 				"sscape: timeout reading firmware version\n");
567 		ret = -EAGAIN;
568 	}
569 
570 	return (ret == 0) ? data : ret;
571 }
572 
573 /*
574  * Upload the microcode into the SoundScape.
575  */
576 static int sscape_upload_microcode(struct snd_card *card, int version)
577 {
578 	struct soundscape *sscape = get_card_soundscape(card);
579 	const struct firmware *init_fw = NULL;
580 	char name[14];
581 	int err;
582 
583 	snprintf(name, sizeof(name), "sndscape.co%d", version);
584 
585 	err = request_firmware(&init_fw, name, card->dev);
586 	if (err < 0) {
587 		snd_printk(KERN_ERR "sscape: Error loading sndscape.co%d",
588 				version);
589 		return err;
590 	}
591 	err = upload_dma_data(sscape, init_fw->data, init_fw->size);
592 	if (err == 0)
593 		snd_printk(KERN_INFO "sscape: MIDI firmware loaded %d KBs\n",
594 				init_fw->size >> 10);
595 
596 	release_firmware(init_fw);
597 
598 	return err;
599 }
600 
601 /*
602  * Mixer control for the SoundScape's MIDI device.
603  */
604 static int sscape_midi_info(struct snd_kcontrol *ctl,
605 			    struct snd_ctl_elem_info *uinfo)
606 {
607 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
608 	uinfo->count = 1;
609 	uinfo->value.integer.min = 0;
610 	uinfo->value.integer.max = 127;
611 	return 0;
612 }
613 
614 static int sscape_midi_get(struct snd_kcontrol *kctl,
615 			   struct snd_ctl_elem_value *uctl)
616 {
617 	struct snd_wss *chip = snd_kcontrol_chip(kctl);
618 	struct snd_card *card = chip->card;
619 	register struct soundscape *s = get_card_soundscape(card);
620 	unsigned long flags;
621 
622 	spin_lock_irqsave(&s->lock, flags);
623 	uctl->value.integer.value[0] = s->midi_vol;
624 	spin_unlock_irqrestore(&s->lock, flags);
625 	return 0;
626 }
627 
628 static int sscape_midi_put(struct snd_kcontrol *kctl,
629 			   struct snd_ctl_elem_value *uctl)
630 {
631 	struct snd_wss *chip = snd_kcontrol_chip(kctl);
632 	struct snd_card *card = chip->card;
633 	struct soundscape *s = get_card_soundscape(card);
634 	unsigned long flags;
635 	int change;
636 	unsigned char new_val;
637 
638 	spin_lock_irqsave(&s->lock, flags);
639 
640 	new_val = uctl->value.integer.value[0] & 127;
641 	/*
642 	 * We need to put the board into HOST mode before we
643 	 * can send any volume-changing HOST commands ...
644 	 */
645 	set_host_mode_unsafe(s->io_base);
646 
647 	/*
648 	 * To successfully change the MIDI volume setting, you seem to
649 	 * have to write a volume command, write the new volume value,
650 	 * and then perform another volume-related command. Perhaps the
651 	 * first command is an "open" and the second command is a "close"?
652 	 */
653 	if (s->midi_vol == new_val) {
654 		change = 0;
655 		goto __skip_change;
656 	}
657 	change = host_write_ctrl_unsafe(s->io_base, CMD_SET_MIDI_VOL, 100)
658 		 && host_write_ctrl_unsafe(s->io_base, new_val, 100)
659 		 && host_write_ctrl_unsafe(s->io_base, CMD_XXX_MIDI_VOL, 100)
660 		 && host_write_ctrl_unsafe(s->io_base, new_val, 100);
661 	s->midi_vol = new_val;
662 __skip_change:
663 
664 	/*
665 	 * Take the board out of HOST mode and back into MIDI mode ...
666 	 */
667 	set_midi_mode_unsafe(s->io_base);
668 
669 	spin_unlock_irqrestore(&s->lock, flags);
670 	return change;
671 }
672 
673 static struct snd_kcontrol_new midi_mixer_ctl = {
674 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
675 	.name = "MIDI",
676 	.info = sscape_midi_info,
677 	.get = sscape_midi_get,
678 	.put = sscape_midi_put
679 };
680 
681 /*
682  * The SoundScape can use two IRQs from a possible set of four.
683  * These IRQs are encoded as bit patterns so that they can be
684  * written to the control registers.
685  */
686 static unsigned get_irq_config(int sscape_type, int irq)
687 {
688 	static const int valid_irq[] = { 9, 5, 7, 10 };
689 	static const int old_irq[] = { 9, 7, 5, 15 };
690 	unsigned cfg;
691 
692 	if (sscape_type == MEDIA_FX) {
693 		for (cfg = 0; cfg < ARRAY_SIZE(old_irq); ++cfg)
694 			if (irq == old_irq[cfg])
695 				return cfg;
696 	} else {
697 		for (cfg = 0; cfg < ARRAY_SIZE(valid_irq); ++cfg)
698 			if (irq == valid_irq[cfg])
699 				return cfg;
700 	}
701 
702 	return INVALID_IRQ;
703 }
704 
705 /*
706  * Perform certain arcane port-checks to see whether there
707  * is a SoundScape board lurking behind the given ports.
708  */
709 static int detect_sscape(struct soundscape *s, long wss_io)
710 {
711 	unsigned long flags;
712 	unsigned d;
713 	int retval = 0;
714 
715 	spin_lock_irqsave(&s->lock, flags);
716 
717 	/*
718 	 * The following code is lifted from the original OSS driver,
719 	 * and as I don't have a datasheet I cannot really comment
720 	 * on what it is doing...
721 	 */
722 	if ((inb(HOST_CTRL_IO(s->io_base)) & 0x78) != 0)
723 		goto _done;
724 
725 	d = inb(ODIE_ADDR_IO(s->io_base)) & 0xf0;
726 	if ((d & 0x80) != 0)
727 		goto _done;
728 
729 	if (d == 0)
730 		s->ic_type = IC_ODIE;
731 	else if ((d & 0x60) != 0)
732 		s->ic_type = IC_OPUS;
733 	else
734 		goto _done;
735 
736 	outb(0xfa, ODIE_ADDR_IO(s->io_base));
737 	if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0a)
738 		goto _done;
739 
740 	outb(0xfe, ODIE_ADDR_IO(s->io_base));
741 	if ((inb(ODIE_ADDR_IO(s->io_base)) & 0x9f) != 0x0e)
742 		goto _done;
743 
744 	outb(0xfe, ODIE_ADDR_IO(s->io_base));
745 	d = inb(ODIE_DATA_IO(s->io_base));
746 	if (s->type != SSCAPE_VIVO && (d & 0x9f) != 0x0e)
747 		goto _done;
748 
749 	if (s->ic_type == IC_OPUS)
750 		activate_ad1845_unsafe(s->io_base);
751 
752 	if (s->type == SSCAPE_VIVO)
753 		wss_io += 4;
754 
755 	d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
756 	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
757 
758 	/* wait for WSS codec */
759 	for (d = 0; d < 500; d++) {
760 		if ((inb(wss_io) & 0x80) == 0)
761 			break;
762 		spin_unlock_irqrestore(&s->lock, flags);
763 		msleep(1);
764 		spin_lock_irqsave(&s->lock, flags);
765 	}
766 
767 	if ((inb(wss_io) & 0x80) != 0)
768 		goto _done;
769 
770 	if (inb(wss_io + 2) == 0xff)
771 		goto _done;
772 
773 	d  = sscape_read_unsafe(s->io_base, GA_HMCTL_REG) & 0x3f;
774 	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d);
775 
776 	if ((inb(wss_io) & 0x80) != 0)
777 		s->type = MEDIA_FX;
778 
779 	d = sscape_read_unsafe(s->io_base, GA_HMCTL_REG);
780 	sscape_write_unsafe(s->io_base, GA_HMCTL_REG, d | 0xc0);
781 	/* wait for WSS codec */
782 	for (d = 0; d < 500; d++) {
783 		if ((inb(wss_io) & 0x80) == 0)
784 			break;
785 		spin_unlock_irqrestore(&s->lock, flags);
786 		msleep(1);
787 		spin_lock_irqsave(&s->lock, flags);
788 	}
789 
790 	/*
791 	 * SoundScape successfully detected!
792 	 */
793 	retval = 1;
794 
795 _done:
796 	spin_unlock_irqrestore(&s->lock, flags);
797 	return retval;
798 }
799 
800 /*
801  * ALSA callback function, called when attempting to open the MIDI device.
802  * Check that the MIDI firmware has been loaded, because we don't want
803  * to crash the machine. Also check that someone isn't using the hardware
804  * IOCTL device.
805  */
806 static int mpu401_open(struct snd_mpu401 *mpu)
807 {
808 	if (!verify_mpu401(mpu)) {
809 		snd_printk(KERN_ERR "sscape: MIDI disabled, "
810 				    "please load firmware\n");
811 		return -ENODEV;
812 	}
813 
814 	return 0;
815 }
816 
817 /*
818  * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
819  */
820 static int create_mpu401(struct snd_card *card, int devnum,
821 			 unsigned long port, int irq)
822 {
823 	struct soundscape *sscape = get_card_soundscape(card);
824 	struct snd_rawmidi *rawmidi;
825 	int err;
826 
827 	err = snd_mpu401_uart_new(card, devnum, MPU401_HW_MPU401, port,
828 				  MPU401_INFO_INTEGRATED, irq, &rawmidi);
829 	if (err == 0) {
830 		struct snd_mpu401 *mpu = rawmidi->private_data;
831 		mpu->open_input = mpu401_open;
832 		mpu->open_output = mpu401_open;
833 		mpu->private_data = sscape;
834 
835 		initialise_mpu401(mpu);
836 	}
837 
838 	return err;
839 }
840 
841 
842 /*
843  * Create an AD1845 PCM subdevice on the SoundScape. The AD1845
844  * is very much like a CS4231, with a few extra bits. We will
845  * try to support at least some of the extra bits by overriding
846  * some of the CS4231 callback.
847  */
848 static int create_ad1845(struct snd_card *card, unsigned port,
849 			 int irq, int dma1, int dma2)
850 {
851 	register struct soundscape *sscape = get_card_soundscape(card);
852 	struct snd_wss *chip;
853 	int err;
854 	int codec_type = WSS_HW_DETECT;
855 
856 	switch (sscape->type) {
857 	case MEDIA_FX:
858 	case SSCAPE:
859 		/*
860 		 * There are some freak examples of early Soundscape cards
861 		 * with CS4231 instead of AD1848/CS4248. Unfortunately, the
862 		 * CS4231 works only in CS4248 compatibility mode on
863 		 * these cards so force it.
864 		 */
865 		if (sscape->ic_type != IC_OPUS)
866 			codec_type = WSS_HW_AD1848;
867 		break;
868 
869 	case SSCAPE_VIVO:
870 		port += 4;
871 		break;
872 	default:
873 		break;
874 	}
875 
876 	err = snd_wss_create(card, port, -1, irq, dma1, dma2,
877 			     codec_type, WSS_HWSHARE_DMA1, &chip);
878 	if (!err) {
879 		unsigned long flags;
880 		struct snd_pcm *pcm;
881 
882 		if (sscape->type != SSCAPE_VIVO) {
883 			/*
884 			 * The input clock frequency on the SoundScape must
885 			 * be 14.31818 MHz, because we must set this register
886 			 * to get the playback to sound correct ...
887 			 */
888 			snd_wss_mce_up(chip);
889 			spin_lock_irqsave(&chip->reg_lock, flags);
890 			snd_wss_out(chip, AD1845_CLOCK, 0x20);
891 			spin_unlock_irqrestore(&chip->reg_lock, flags);
892 			snd_wss_mce_down(chip);
893 
894 		}
895 
896 		err = snd_wss_pcm(chip, 0, &pcm);
897 		if (err < 0) {
898 			snd_printk(KERN_ERR "sscape: No PCM device "
899 					    "for AD1845 chip\n");
900 			goto _error;
901 		}
902 
903 		err = snd_wss_mixer(chip);
904 		if (err < 0) {
905 			snd_printk(KERN_ERR "sscape: No mixer device "
906 					    "for AD1845 chip\n");
907 			goto _error;
908 		}
909 		if (chip->hardware != WSS_HW_AD1848) {
910 			err = snd_wss_timer(chip, 0, NULL);
911 			if (err < 0) {
912 				snd_printk(KERN_ERR "sscape: No timer device "
913 						    "for AD1845 chip\n");
914 				goto _error;
915 			}
916 		}
917 
918 		if (sscape->type != SSCAPE_VIVO) {
919 			err = snd_ctl_add(card,
920 					  snd_ctl_new1(&midi_mixer_ctl, chip));
921 			if (err < 0) {
922 				snd_printk(KERN_ERR "sscape: Could not create "
923 						    "MIDI mixer control\n");
924 				goto _error;
925 			}
926 		}
927 
928 		sscape->chip = chip;
929 	}
930 
931 _error:
932 	return err;
933 }
934 
935 
936 /*
937  * Create an ALSA soundcard entry for the SoundScape, using
938  * the given list of port, IRQ and DMA resources.
939  */
940 static int create_sscape(int dev, struct snd_card *card)
941 {
942 	struct soundscape *sscape = get_card_soundscape(card);
943 	unsigned dma_cfg;
944 	unsigned irq_cfg;
945 	unsigned mpu_irq_cfg;
946 	struct resource *io_res;
947 	struct resource *wss_res;
948 	unsigned long flags;
949 	int err;
950 	int val;
951 	const char *name;
952 
953 	/*
954 	 * Grab IO ports that we will need to probe so that we
955 	 * can detect and control this hardware ...
956 	 */
957 	io_res = request_region(port[dev], 8, "SoundScape");
958 	if (!io_res) {
959 		snd_printk(KERN_ERR
960 			   "sscape: can't grab port 0x%lx\n", port[dev]);
961 		return -EBUSY;
962 	}
963 	wss_res = NULL;
964 	if (sscape->type == SSCAPE_VIVO) {
965 		wss_res = request_region(wss_port[dev], 4, "SoundScape");
966 		if (!wss_res) {
967 			snd_printk(KERN_ERR "sscape: can't grab port 0x%lx\n",
968 					    wss_port[dev]);
969 			err = -EBUSY;
970 			goto _release_region;
971 		}
972 	}
973 
974 	/*
975 	 * Grab one DMA channel ...
976 	 */
977 	err = request_dma(dma[dev], "SoundScape");
978 	if (err < 0) {
979 		snd_printk(KERN_ERR "sscape: can't grab DMA %d\n", dma[dev]);
980 		goto _release_region;
981 	}
982 
983 	spin_lock_init(&sscape->lock);
984 	sscape->io_res = io_res;
985 	sscape->wss_res = wss_res;
986 	sscape->io_base = port[dev];
987 
988 	if (!detect_sscape(sscape, wss_port[dev])) {
989 		printk(KERN_ERR "sscape: hardware not detected at 0x%x\n",
990 			sscape->io_base);
991 		err = -ENODEV;
992 		goto _release_dma;
993 	}
994 
995 	switch (sscape->type) {
996 	case MEDIA_FX:
997 		name = "MediaFX/SoundFX";
998 		break;
999 	case SSCAPE:
1000 		name = "Soundscape";
1001 		break;
1002 	case SSCAPE_PNP:
1003 		name = "Soundscape PnP";
1004 		break;
1005 	case SSCAPE_VIVO:
1006 		name = "Soundscape VIVO";
1007 		break;
1008 	default:
1009 		name = "unknown Soundscape";
1010 		break;
1011 	}
1012 
1013 	printk(KERN_INFO "sscape: %s card detected at 0x%x, using IRQ %d, DMA %d\n",
1014 			 name, sscape->io_base, irq[dev], dma[dev]);
1015 
1016 	/*
1017 	 * Check that the user didn't pass us garbage data ...
1018 	 */
1019 	irq_cfg = get_irq_config(sscape->type, irq[dev]);
1020 	if (irq_cfg == INVALID_IRQ) {
1021 		snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", irq[dev]);
1022 		err = -ENXIO;
1023 		goto _release_dma;
1024 	}
1025 
1026 	mpu_irq_cfg = get_irq_config(sscape->type, mpu_irq[dev]);
1027 	if (mpu_irq_cfg == INVALID_IRQ) {
1028 		snd_printk(KERN_ERR "sscape: Invalid IRQ %d\n", mpu_irq[dev]);
1029 		err = -ENXIO;
1030 		goto _release_dma;
1031 	}
1032 
1033 	/*
1034 	 * Tell the on-board devices where their resources are (I think -
1035 	 * I can't be sure without a datasheet ... So many magic values!)
1036 	 */
1037 	spin_lock_irqsave(&sscape->lock, flags);
1038 
1039 	sscape_write_unsafe(sscape->io_base, GA_SMCFGA_REG, 0x2e);
1040 	sscape_write_unsafe(sscape->io_base, GA_SMCFGB_REG, 0x00);
1041 
1042 	/*
1043 	 * Enable and configure the DMA channels ...
1044 	 */
1045 	sscape_write_unsafe(sscape->io_base, GA_DMACFG_REG, 0x50);
1046 	dma_cfg = (sscape->ic_type == IC_OPUS ? 0x40 : 0x70);
1047 	sscape_write_unsafe(sscape->io_base, GA_DMAA_REG, dma_cfg);
1048 	sscape_write_unsafe(sscape->io_base, GA_DMAB_REG, 0x20);
1049 
1050 	mpu_irq_cfg |= mpu_irq_cfg << 2;
1051 	val = sscape_read_unsafe(sscape->io_base, GA_HMCTL_REG) & 0xF7;
1052 	if (joystick[dev])
1053 		val |= 8;
1054 	sscape_write_unsafe(sscape->io_base, GA_HMCTL_REG, val | 0x10);
1055 	sscape_write_unsafe(sscape->io_base, GA_INTCFG_REG, 0xf0 | mpu_irq_cfg);
1056 	sscape_write_unsafe(sscape->io_base,
1057 			    GA_CDCFG_REG, 0x09 | DMA_8BIT
1058 			    | (dma[dev] << 4) | (irq_cfg << 1));
1059 	/*
1060 	 * Enable the master IRQ ...
1061 	 */
1062 	sscape_write_unsafe(sscape->io_base, GA_INTENA_REG, 0x80);
1063 
1064 	spin_unlock_irqrestore(&sscape->lock, flags);
1065 
1066 	/*
1067 	 * We have now enabled the codec chip, and so we should
1068 	 * detect the AD1845 device ...
1069 	 */
1070 	err = create_ad1845(card, wss_port[dev], irq[dev],
1071 			    dma[dev], dma2[dev]);
1072 	if (err < 0) {
1073 		snd_printk(KERN_ERR
1074 				"sscape: No AD1845 device at 0x%lx, IRQ %d\n",
1075 				wss_port[dev], irq[dev]);
1076 		goto _release_dma;
1077 	}
1078 	strcpy(card->driver, "SoundScape");
1079 	strcpy(card->shortname, name);
1080 	snprintf(card->longname, sizeof(card->longname),
1081 		 "%s at 0x%lx, IRQ %d, DMA1 %d, DMA2 %d\n",
1082 		 name, sscape->chip->port, sscape->chip->irq,
1083 		 sscape->chip->dma1, sscape->chip->dma2);
1084 
1085 #define MIDI_DEVNUM  0
1086 	if (sscape->type != SSCAPE_VIVO) {
1087 		err = sscape_upload_bootblock(card);
1088 		if (err >= 0)
1089 			err = sscape_upload_microcode(card, err);
1090 
1091 		if (err == 0) {
1092 			err = create_mpu401(card, MIDI_DEVNUM, port[dev],
1093 					    mpu_irq[dev]);
1094 			if (err < 0) {
1095 				snd_printk(KERN_ERR "sscape: Failed to create "
1096 						"MPU-401 device at 0x%lx\n",
1097 						port[dev]);
1098 				goto _release_dma;
1099 			}
1100 
1101 			/*
1102 			 * Initialize mixer
1103 			 */
1104 			spin_lock_irqsave(&sscape->lock, flags);
1105 			sscape->midi_vol = 0;
1106 			host_write_ctrl_unsafe(sscape->io_base,
1107 						CMD_SET_MIDI_VOL, 100);
1108 			host_write_ctrl_unsafe(sscape->io_base,
1109 						sscape->midi_vol, 100);
1110 			host_write_ctrl_unsafe(sscape->io_base,
1111 						CMD_XXX_MIDI_VOL, 100);
1112 			host_write_ctrl_unsafe(sscape->io_base,
1113 						sscape->midi_vol, 100);
1114 			host_write_ctrl_unsafe(sscape->io_base,
1115 						CMD_SET_EXTMIDI, 100);
1116 			host_write_ctrl_unsafe(sscape->io_base,
1117 						0, 100);
1118 			host_write_ctrl_unsafe(sscape->io_base, CMD_ACK, 100);
1119 
1120 			set_midi_mode_unsafe(sscape->io_base);
1121 			spin_unlock_irqrestore(&sscape->lock, flags);
1122 		}
1123 	}
1124 
1125 	/*
1126 	 * Now that we have successfully created this sound card,
1127 	 * it is safe to store the pointer.
1128 	 * NOTE: we only register the sound card's "destructor"
1129 	 *       function now that our "constructor" has completed.
1130 	 */
1131 	card->private_free = soundscape_free;
1132 
1133 	return 0;
1134 
1135 _release_dma:
1136 	free_dma(dma[dev]);
1137 
1138 _release_region:
1139 	release_and_free_resource(wss_res);
1140 	release_and_free_resource(io_res);
1141 
1142 	return err;
1143 }
1144 
1145 
1146 static int snd_sscape_match(struct device *pdev, unsigned int i)
1147 {
1148 	/*
1149 	 * Make sure we were given ALL of the other parameters.
1150 	 */
1151 	if (port[i] == SNDRV_AUTO_PORT)
1152 		return 0;
1153 
1154 	if (irq[i] == SNDRV_AUTO_IRQ ||
1155 	    mpu_irq[i] == SNDRV_AUTO_IRQ ||
1156 	    dma[i] == SNDRV_AUTO_DMA) {
1157 		printk(KERN_INFO
1158 		       "sscape: insufficient parameters, "
1159 		       "need IO, IRQ, MPU-IRQ and DMA\n");
1160 		return 0;
1161 	}
1162 
1163 	return 1;
1164 }
1165 
1166 static int snd_sscape_probe(struct device *pdev, unsigned int dev)
1167 {
1168 	struct snd_card *card;
1169 	struct soundscape *sscape;
1170 	int ret;
1171 
1172 	ret = snd_card_create(index[dev], id[dev], THIS_MODULE,
1173 			      sizeof(struct soundscape), &card);
1174 	if (ret < 0)
1175 		return ret;
1176 
1177 	sscape = get_card_soundscape(card);
1178 	sscape->type = SSCAPE;
1179 
1180 	dma[dev] &= 0x03;
1181 	snd_card_set_dev(card, pdev);
1182 
1183 	ret = create_sscape(dev, card);
1184 	if (ret < 0)
1185 		goto _release_card;
1186 
1187 	ret = snd_card_register(card);
1188 	if (ret < 0) {
1189 		snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1190 		goto _release_card;
1191 	}
1192 	dev_set_drvdata(pdev, card);
1193 	return 0;
1194 
1195 _release_card:
1196 	snd_card_free(card);
1197 	return ret;
1198 }
1199 
1200 static int snd_sscape_remove(struct device *devptr, unsigned int dev)
1201 {
1202 	snd_card_free(dev_get_drvdata(devptr));
1203 	dev_set_drvdata(devptr, NULL);
1204 	return 0;
1205 }
1206 
1207 #define DEV_NAME "sscape"
1208 
1209 static struct isa_driver snd_sscape_driver = {
1210 	.match		= snd_sscape_match,
1211 	.probe		= snd_sscape_probe,
1212 	.remove		= snd_sscape_remove,
1213 	/* FIXME: suspend/resume */
1214 	.driver		= {
1215 		.name	= DEV_NAME
1216 	},
1217 };
1218 
1219 #ifdef CONFIG_PNP
1220 static inline int get_next_autoindex(int i)
1221 {
1222 	while (i < SNDRV_CARDS && port[i] != SNDRV_AUTO_PORT)
1223 		++i;
1224 	return i;
1225 }
1226 
1227 
1228 static int sscape_pnp_detect(struct pnp_card_link *pcard,
1229 			     const struct pnp_card_device_id *pid)
1230 {
1231 	static int idx = 0;
1232 	struct pnp_dev *dev;
1233 	struct snd_card *card;
1234 	struct soundscape *sscape;
1235 	int ret;
1236 
1237 	/*
1238 	 * Allow this function to fail *quietly* if all the ISA PnP
1239 	 * devices were configured using module parameters instead.
1240 	 */
1241 	idx = get_next_autoindex(idx);
1242 	if (idx >= SNDRV_CARDS)
1243 		return -ENOSPC;
1244 
1245 	/*
1246 	 * Check that we still have room for another sound card ...
1247 	 */
1248 	dev = pnp_request_card_device(pcard, pid->devs[0].id, NULL);
1249 	if (!dev)
1250 		return -ENODEV;
1251 
1252 	if (!pnp_is_active(dev)) {
1253 		if (pnp_activate_dev(dev) < 0) {
1254 			snd_printk(KERN_INFO "sscape: device is inactive\n");
1255 			return -EBUSY;
1256 		}
1257 	}
1258 
1259 	/*
1260 	 * Create a new ALSA sound card entry, in anticipation
1261 	 * of detecting our hardware ...
1262 	 */
1263 	ret = snd_card_create(index[idx], id[idx], THIS_MODULE,
1264 			      sizeof(struct soundscape), &card);
1265 	if (ret < 0)
1266 		return ret;
1267 
1268 	sscape = get_card_soundscape(card);
1269 
1270 	/*
1271 	 * Identify card model ...
1272 	 */
1273 	if (!strncmp("ENS4081", pid->id, 7))
1274 		sscape->type = SSCAPE_VIVO;
1275 	else
1276 		sscape->type = SSCAPE_PNP;
1277 
1278 	/*
1279 	 * Read the correct parameters off the ISA PnP bus ...
1280 	 */
1281 	port[idx] = pnp_port_start(dev, 0);
1282 	irq[idx] = pnp_irq(dev, 0);
1283 	mpu_irq[idx] = pnp_irq(dev, 1);
1284 	dma[idx] = pnp_dma(dev, 0) & 0x03;
1285 	if (sscape->type == SSCAPE_PNP) {
1286 		dma2[idx] = dma[idx];
1287 		wss_port[idx] = CODEC_IO(port[idx]);
1288 	} else {
1289 		wss_port[idx] = pnp_port_start(dev, 1);
1290 		dma2[idx] = pnp_dma(dev, 1);
1291 	}
1292 	snd_card_set_dev(card, &pcard->card->dev);
1293 
1294 	ret = create_sscape(idx, card);
1295 	if (ret < 0)
1296 		goto _release_card;
1297 
1298 	ret = snd_card_register(card);
1299 	if (ret < 0) {
1300 		snd_printk(KERN_ERR "sscape: Failed to register sound card\n");
1301 		goto _release_card;
1302 	}
1303 
1304 	pnp_set_card_drvdata(pcard, card);
1305 	++idx;
1306 	return 0;
1307 
1308 _release_card:
1309 	snd_card_free(card);
1310 	return ret;
1311 }
1312 
1313 static void sscape_pnp_remove(struct pnp_card_link *pcard)
1314 {
1315 	snd_card_free(pnp_get_card_drvdata(pcard));
1316 	pnp_set_card_drvdata(pcard, NULL);
1317 }
1318 
1319 static struct pnp_card_driver sscape_pnpc_driver = {
1320 	.flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
1321 	.name = "sscape",
1322 	.id_table = sscape_pnpids,
1323 	.probe = sscape_pnp_detect,
1324 	.remove = sscape_pnp_remove,
1325 };
1326 
1327 #endif /* CONFIG_PNP */
1328 
1329 static int __init sscape_init(void)
1330 {
1331 	int err;
1332 
1333 	err = isa_register_driver(&snd_sscape_driver, SNDRV_CARDS);
1334 #ifdef CONFIG_PNP
1335 	if (!err)
1336 		isa_registered = 1;
1337 
1338 	err = pnp_register_card_driver(&sscape_pnpc_driver);
1339 	if (!err)
1340 		pnp_registered = 1;
1341 
1342 	if (isa_registered)
1343 		err = 0;
1344 #endif
1345 	return err;
1346 }
1347 
1348 static void __exit sscape_exit(void)
1349 {
1350 #ifdef CONFIG_PNP
1351 	if (pnp_registered)
1352 		pnp_unregister_card_driver(&sscape_pnpc_driver);
1353 	if (isa_registered)
1354 #endif
1355 		isa_unregister_driver(&snd_sscape_driver);
1356 }
1357 
1358 module_init(sscape_init);
1359 module_exit(sscape_exit);
1360