xref: /openbmc/linux/sound/pci/als4000.c (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 /*
2  *  card-als4000.c - driver for Avance Logic ALS4000 based soundcards.
3  *  Copyright (C) 2000 by Bart Hartgers <bart@etpmod.phys.tue.nl>,
4  *			  Jaroslav Kysela <perex@suse.cz>
5  *  Copyright (C) 2002 by Andreas Mohr <hw7oshyuv3001@sneakemail.com>
6  *
7  *  Framework borrowed from Massimo Piccioni's card-als100.c.
8  *
9  * NOTES
10  *
11  *  Since Avance does not provide any meaningful documentation, and I
12  *  bought an ALS4000 based soundcard, I was forced to base this driver
13  *  on reverse engineering.
14  *
15  *  Note: this is no longer true. Pretty verbose chip docu (ALS4000a.PDF)
16  *  can be found on the ALSA web site.
17  *
18  *  The ALS4000 seems to be the PCI-cousin of the ALS100. It contains an
19  *  ALS100-like SB DSP/mixer, an OPL3 synth, a MPU401 and a gameport
20  *  interface. These subsystems can be mapped into ISA io-port space,
21  *  using the PCI-interface. In addition, the PCI-bit provides DMA and IRQ
22  *  services to the subsystems.
23  *
24  * While ALS4000 is very similar to a SoundBlaster, the differences in
25  * DMA and capturing require more changes to the SoundBlaster than
26  * desirable, so I made this separate driver.
27  *
28  * The ALS4000 can do real full duplex playback/capture.
29  *
30  * FMDAC:
31  * - 0x4f -> port 0x14
32  * - port 0x15 |= 1
33  *
34  * Enable/disable 3D sound:
35  * - 0x50 -> port 0x14
36  * - change bit 6 (0x40) of port 0x15
37  *
38  * Set QSound:
39  * - 0xdb -> port 0x14
40  * - set port 0x15:
41  *   0x3e (mode 3), 0x3c (mode 2), 0x3a (mode 1), 0x38 (mode 0)
42  *
43  * Set KSound:
44  * - value -> some port 0x0c0d
45  *
46  *  This program is free software; you can redistribute it and/or modify
47  *  it under the terms of the GNU General Public License as published by
48  *  the Free Software Foundation; either version 2 of the License, or
49  *  (at your option) any later version.
50  *
51  *  This program is distributed in the hope that it will be useful,
52  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
53  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
54  *  GNU General Public License for more details.
55 
56  *  You should have received a copy of the GNU General Public License
57  *  along with this program; if not, write to the Free Software
58  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
59  */
60 
61 #include <sound/driver.h>
62 #include <asm/io.h>
63 #include <linux/init.h>
64 #include <linux/pci.h>
65 #include <linux/slab.h>
66 #include <linux/gameport.h>
67 #include <linux/moduleparam.h>
68 #include <sound/core.h>
69 #include <sound/pcm.h>
70 #include <sound/rawmidi.h>
71 #include <sound/mpu401.h>
72 #include <sound/opl3.h>
73 #include <sound/sb.h>
74 #include <sound/initval.h>
75 
76 MODULE_AUTHOR("Bart Hartgers <bart@etpmod.phys.tue.nl>");
77 MODULE_DESCRIPTION("Avance Logic ALS4000");
78 MODULE_LICENSE("GPL");
79 MODULE_SUPPORTED_DEVICE("{{Avance Logic,ALS4000}}");
80 
81 #if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
82 #define SUPPORT_JOYSTICK 1
83 #endif
84 
85 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
86 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
87 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
88 #ifdef SUPPORT_JOYSTICK
89 static int joystick_port[SNDRV_CARDS];
90 #endif
91 
92 module_param_array(index, int, NULL, 0444);
93 MODULE_PARM_DESC(index, "Index value for ALS4000 soundcard.");
94 module_param_array(id, charp, NULL, 0444);
95 MODULE_PARM_DESC(id, "ID string for ALS4000 soundcard.");
96 module_param_array(enable, bool, NULL, 0444);
97 MODULE_PARM_DESC(enable, "Enable ALS4000 soundcard.");
98 #ifdef SUPPORT_JOYSTICK
99 module_param_array(joystick_port, int, NULL, 0444);
100 MODULE_PARM_DESC(joystick_port, "Joystick port address for ALS4000 soundcard. (0 = disabled)");
101 #endif
102 
103 typedef struct {
104 	struct pci_dev *pci;
105 	unsigned long gcr;
106 #ifdef SUPPORT_JOYSTICK
107 	struct gameport *gameport;
108 #endif
109 } snd_card_als4000_t;
110 
111 static struct pci_device_id snd_als4000_ids[] = {
112 	{ 0x4005, 0x4000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, },   /* ALS4000 */
113 	{ 0, }
114 };
115 
116 MODULE_DEVICE_TABLE(pci, snd_als4000_ids);
117 
118 static inline void snd_als4000_gcr_write_addr(unsigned long port, u32 reg, u32 val)
119 {
120 	outb(reg, port+0x0c);
121 	outl(val, port+0x08);
122 }
123 
124 static inline void snd_als4000_gcr_write(sb_t *sb, u32 reg, u32 val)
125 {
126 	snd_als4000_gcr_write_addr(sb->alt_port, reg, val);
127 }
128 
129 static inline u32 snd_als4000_gcr_read_addr(unsigned long port, u32 reg)
130 {
131 	outb(reg, port+0x0c);
132 	return inl(port+0x08);
133 }
134 
135 static inline u32 snd_als4000_gcr_read(sb_t *sb, u32 reg)
136 {
137 	return snd_als4000_gcr_read_addr(sb->alt_port, reg);
138 }
139 
140 static void snd_als4000_set_rate(sb_t *chip, unsigned int rate)
141 {
142 	if (!(chip->mode & SB_RATE_LOCK)) {
143 		snd_sbdsp_command(chip, SB_DSP_SAMPLE_RATE_OUT);
144 		snd_sbdsp_command(chip, rate>>8);
145 		snd_sbdsp_command(chip, rate);
146 	}
147 }
148 
149 static void snd_als4000_set_capture_dma(sb_t *chip, dma_addr_t addr, unsigned size)
150 {
151 	snd_als4000_gcr_write(chip, 0xa2, addr);
152 	snd_als4000_gcr_write(chip, 0xa3, (size-1));
153 }
154 
155 static void snd_als4000_set_playback_dma(sb_t *chip, dma_addr_t addr, unsigned size)
156 {
157 	snd_als4000_gcr_write(chip, 0x91, addr);
158 	snd_als4000_gcr_write(chip, 0x92, (size-1)|0x180000);
159 }
160 
161 #define ALS4000_FORMAT_SIGNED	(1<<0)
162 #define ALS4000_FORMAT_16BIT	(1<<1)
163 #define ALS4000_FORMAT_STEREO	(1<<2)
164 
165 static int snd_als4000_get_format(snd_pcm_runtime_t *runtime)
166 {
167 	int result;
168 
169 	result = 0;
170 	if (snd_pcm_format_signed(runtime->format))
171 		result |= ALS4000_FORMAT_SIGNED;
172 	if (snd_pcm_format_physical_width(runtime->format) == 16)
173 		result |= ALS4000_FORMAT_16BIT;
174 	if (runtime->channels > 1)
175 		result |= ALS4000_FORMAT_STEREO;
176 	return result;
177 }
178 
179 /* structure for setting up playback */
180 static struct {
181 	unsigned char dsp_cmd, dma_on, dma_off, format;
182 } playback_cmd_vals[]={
183 /* ALS4000_FORMAT_U8_MONO */
184 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_MONO },
185 /* ALS4000_FORMAT_S8_MONO */
186 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_MONO },
187 /* ALS4000_FORMAT_U16L_MONO */
188 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_MONO },
189 /* ALS4000_FORMAT_S16L_MONO */
190 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_MONO },
191 /* ALS4000_FORMAT_U8_STEREO */
192 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_UNS_STEREO },
193 /* ALS4000_FORMAT_S8_STEREO */
194 { SB_DSP4_OUT8_AI, SB_DSP_DMA8_ON, SB_DSP_DMA8_OFF, SB_DSP4_MODE_SIGN_STEREO },
195 /* ALS4000_FORMAT_U16L_STEREO */
196 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_UNS_STEREO },
197 /* ALS4000_FORMAT_S16L_STEREO */
198 { SB_DSP4_OUT16_AI, SB_DSP_DMA16_ON, SB_DSP_DMA16_OFF, SB_DSP4_MODE_SIGN_STEREO },
199 };
200 #define playback_cmd(chip) (playback_cmd_vals[(chip)->playback_format])
201 
202 /* structure for setting up capture */
203 enum { CMD_WIDTH8=0x04, CMD_SIGNED=0x10, CMD_MONO=0x80, CMD_STEREO=0xA0 };
204 static unsigned char capture_cmd_vals[]=
205 {
206 CMD_WIDTH8|CMD_MONO,			/* ALS4000_FORMAT_U8_MONO */
207 CMD_WIDTH8|CMD_SIGNED|CMD_MONO,		/* ALS4000_FORMAT_S8_MONO */
208 CMD_MONO,				/* ALS4000_FORMAT_U16L_MONO */
209 CMD_SIGNED|CMD_MONO,			/* ALS4000_FORMAT_S16L_MONO */
210 CMD_WIDTH8|CMD_STEREO,			/* ALS4000_FORMAT_U8_STEREO */
211 CMD_WIDTH8|CMD_SIGNED|CMD_STEREO,	/* ALS4000_FORMAT_S8_STEREO */
212 CMD_STEREO,				/* ALS4000_FORMAT_U16L_STEREO */
213 CMD_SIGNED|CMD_STEREO,			/* ALS4000_FORMAT_S16L_STEREO */
214 };
215 #define capture_cmd(chip) (capture_cmd_vals[(chip)->capture_format])
216 
217 static int snd_als4000_hw_params(snd_pcm_substream_t * substream,
218 				 snd_pcm_hw_params_t * hw_params)
219 {
220 	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
221 }
222 
223 static int snd_als4000_hw_free(snd_pcm_substream_t * substream)
224 {
225 	snd_pcm_lib_free_pages(substream);
226 	return 0;
227 }
228 
229 static int snd_als4000_capture_prepare(snd_pcm_substream_t * substream)
230 {
231 	unsigned long flags;
232 	sb_t *chip = snd_pcm_substream_chip(substream);
233 	snd_pcm_runtime_t *runtime = substream->runtime;
234 	unsigned long size;
235 	unsigned count;
236 
237 	chip->capture_format = snd_als4000_get_format(runtime);
238 
239 	size = snd_pcm_lib_buffer_bytes(substream);
240 	count = snd_pcm_lib_period_bytes(substream);
241 
242 	if (chip->capture_format & ALS4000_FORMAT_16BIT)
243 		count >>=1;
244 	count--;
245 
246 	spin_lock_irqsave(&chip->reg_lock, flags);
247 	snd_als4000_set_rate(chip, runtime->rate);
248 	snd_als4000_set_capture_dma(chip, runtime->dma_addr, size);
249 	spin_unlock_irqrestore(&chip->reg_lock, flags);
250 	spin_lock_irqsave(&chip->mixer_lock, flags );
251 	snd_sbmixer_write(chip, 0xdc, count);
252 	snd_sbmixer_write(chip, 0xdd, count>>8);
253 	spin_unlock_irqrestore(&chip->mixer_lock, flags );
254 	return 0;
255 }
256 
257 static int snd_als4000_playback_prepare(snd_pcm_substream_t *substream)
258 {
259 	unsigned long flags;
260 	sb_t *chip = snd_pcm_substream_chip(substream);
261 	snd_pcm_runtime_t *runtime = substream->runtime;
262 	unsigned long size;
263 	unsigned count;
264 
265 	chip->playback_format = snd_als4000_get_format(runtime);
266 
267 	size = snd_pcm_lib_buffer_bytes(substream);
268 	count = snd_pcm_lib_period_bytes(substream);
269 
270 	if (chip->playback_format & ALS4000_FORMAT_16BIT)
271 		count >>=1;
272 	count--;
273 
274 	/* FIXME: from second playback on, there's a lot more clicks and pops
275 	 * involved here than on first playback. Fiddling with
276 	 * tons of different settings didn't help (DMA, speaker on/off,
277 	 * reordering, ...). Something seems to get enabled on playback
278 	 * that I haven't found out how to disable again, which then causes
279 	 * the switching pops to reach the speakers the next time here. */
280 	spin_lock_irqsave(&chip->reg_lock, flags);
281 	snd_als4000_set_rate(chip, runtime->rate);
282 	snd_als4000_set_playback_dma(chip, runtime->dma_addr, size);
283 
284 	/* SPEAKER_ON not needed, since dma_on seems to also enable speaker */
285 	/* snd_sbdsp_command(chip, SB_DSP_SPEAKER_ON); */
286 	snd_sbdsp_command(chip, playback_cmd(chip).dsp_cmd);
287 	snd_sbdsp_command(chip, playback_cmd(chip).format);
288 	snd_sbdsp_command(chip, count);
289 	snd_sbdsp_command(chip, count>>8);
290 	snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
291 	spin_unlock_irqrestore(&chip->reg_lock, flags);
292 
293 	return 0;
294 }
295 
296 static int snd_als4000_capture_trigger(snd_pcm_substream_t * substream, int cmd)
297 {
298 	sb_t *chip = snd_pcm_substream_chip(substream);
299 	int result = 0;
300 
301 	spin_lock(&chip->mixer_lock);
302 	if (cmd == SNDRV_PCM_TRIGGER_START) {
303 		chip->mode |= SB_RATE_LOCK_CAPTURE;
304 		snd_sbmixer_write(chip, 0xde, capture_cmd(chip));
305 	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
306 		chip->mode &= ~SB_RATE_LOCK_CAPTURE;
307 		snd_sbmixer_write(chip, 0xde, 0);
308 	} else {
309 		result = -EINVAL;
310 	}
311 	spin_unlock(&chip->mixer_lock);
312 	return result;
313 }
314 
315 static int snd_als4000_playback_trigger(snd_pcm_substream_t * substream, int cmd)
316 {
317 	sb_t *chip = snd_pcm_substream_chip(substream);
318 	int result = 0;
319 
320 	spin_lock(&chip->reg_lock);
321 	if (cmd == SNDRV_PCM_TRIGGER_START) {
322 		chip->mode |= SB_RATE_LOCK_PLAYBACK;
323 		snd_sbdsp_command(chip, playback_cmd(chip).dma_on);
324 	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
325 		snd_sbdsp_command(chip, playback_cmd(chip).dma_off);
326 		chip->mode &= ~SB_RATE_LOCK_PLAYBACK;
327 	} else {
328 		result = -EINVAL;
329 	}
330 	spin_unlock(&chip->reg_lock);
331 	return result;
332 }
333 
334 static snd_pcm_uframes_t snd_als4000_capture_pointer(snd_pcm_substream_t * substream)
335 {
336 	sb_t *chip = snd_pcm_substream_chip(substream);
337 	unsigned int result;
338 
339 	spin_lock(&chip->reg_lock);
340 	result = snd_als4000_gcr_read(chip, 0xa4) & 0xffff;
341 	spin_unlock(&chip->reg_lock);
342 	return bytes_to_frames( substream->runtime, result );
343 }
344 
345 static snd_pcm_uframes_t snd_als4000_playback_pointer(snd_pcm_substream_t * substream)
346 {
347 	sb_t *chip = snd_pcm_substream_chip(substream);
348 	unsigned result;
349 
350 	spin_lock(&chip->reg_lock);
351 	result = snd_als4000_gcr_read(chip, 0xa0) & 0xffff;
352 	spin_unlock(&chip->reg_lock);
353 	return bytes_to_frames( substream->runtime, result );
354 }
355 
356 static irqreturn_t snd_als4000_interrupt(int irq, void *dev_id, struct pt_regs *regs)
357 {
358 	sb_t *chip = dev_id;
359 	unsigned gcr_status;
360 	unsigned sb_status;
361 
362 	/* find out which bit of the ALS4000 produced the interrupt */
363 	gcr_status = inb(chip->alt_port + 0xe);
364 
365 	if ((gcr_status & 0x80) && (chip->playback_substream)) /* playback */
366 		snd_pcm_period_elapsed(chip->playback_substream);
367 	if ((gcr_status & 0x40) && (chip->capture_substream)) /* capturing */
368 		snd_pcm_period_elapsed(chip->capture_substream);
369 	if ((gcr_status & 0x10) && (chip->rmidi)) /* MPU401 interrupt */
370 		snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
371 	/* release the gcr */
372 	outb(gcr_status, chip->alt_port + 0xe);
373 
374 	spin_lock(&chip->mixer_lock);
375 	sb_status = snd_sbmixer_read(chip, SB_DSP4_IRQSTATUS);
376 	spin_unlock(&chip->mixer_lock);
377 
378 	if (sb_status & SB_IRQTYPE_8BIT)
379 		snd_sb_ack_8bit(chip);
380 	if (sb_status & SB_IRQTYPE_16BIT)
381 		snd_sb_ack_16bit(chip);
382 	if (sb_status & SB_IRQTYPE_MPUIN)
383 		inb(chip->mpu_port);
384 	if (sb_status & 0x20)
385 		inb(SBP(chip, RESET));
386 	return IRQ_HANDLED;
387 }
388 
389 /*****************************************************************/
390 
391 static snd_pcm_hardware_t snd_als4000_playback =
392 {
393 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
394 				 SNDRV_PCM_INFO_MMAP_VALID),
395 	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
396 				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */
397 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
398 	.rate_min =		4000,
399 	.rate_max =		48000,
400 	.channels_min =		1,
401 	.channels_max =		2,
402 	.buffer_bytes_max =	65536,
403 	.period_bytes_min =	64,
404 	.period_bytes_max =	65536,
405 	.periods_min =		1,
406 	.periods_max =		1024,
407 	.fifo_size =		0
408 };
409 
410 static snd_pcm_hardware_t snd_als4000_capture =
411 {
412 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
413 				 SNDRV_PCM_INFO_MMAP_VALID),
414 	.formats =		SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U8 |
415 				SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_U16_LE,	/* formats */
416 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
417 	.rate_min =		4000,
418 	.rate_max =		48000,
419 	.channels_min =		1,
420 	.channels_max =		2,
421 	.buffer_bytes_max =	65536,
422 	.period_bytes_min =	64,
423 	.period_bytes_max =	65536,
424 	.periods_min =		1,
425 	.periods_max =		1024,
426 	.fifo_size =		0
427 };
428 
429 /*****************************************************************/
430 
431 static int snd_als4000_playback_open(snd_pcm_substream_t * substream)
432 {
433 	sb_t *chip = snd_pcm_substream_chip(substream);
434 	snd_pcm_runtime_t *runtime = substream->runtime;
435 
436 	chip->playback_substream = substream;
437 	runtime->hw = snd_als4000_playback;
438 	return 0;
439 }
440 
441 static int snd_als4000_playback_close(snd_pcm_substream_t * substream)
442 {
443 	sb_t *chip = snd_pcm_substream_chip(substream);
444 
445 	chip->playback_substream = NULL;
446 	snd_pcm_lib_free_pages(substream);
447 	return 0;
448 }
449 
450 static int snd_als4000_capture_open(snd_pcm_substream_t * substream)
451 {
452 	sb_t *chip = snd_pcm_substream_chip(substream);
453 	snd_pcm_runtime_t *runtime = substream->runtime;
454 
455 	chip->capture_substream = substream;
456 	runtime->hw = snd_als4000_capture;
457 	return 0;
458 }
459 
460 static int snd_als4000_capture_close(snd_pcm_substream_t * substream)
461 {
462 	sb_t *chip = snd_pcm_substream_chip(substream);
463 
464 	chip->capture_substream = NULL;
465 	snd_pcm_lib_free_pages(substream);
466 	return 0;
467 }
468 
469 /******************************************************************/
470 
471 static snd_pcm_ops_t snd_als4000_playback_ops = {
472 	.open =		snd_als4000_playback_open,
473 	.close =	snd_als4000_playback_close,
474 	.ioctl =	snd_pcm_lib_ioctl,
475 	.hw_params =	snd_als4000_hw_params,
476 	.hw_free =	snd_als4000_hw_free,
477 	.prepare =	snd_als4000_playback_prepare,
478 	.trigger =	snd_als4000_playback_trigger,
479 	.pointer =	snd_als4000_playback_pointer
480 };
481 
482 static snd_pcm_ops_t snd_als4000_capture_ops = {
483 	.open =		snd_als4000_capture_open,
484 	.close =	snd_als4000_capture_close,
485 	.ioctl =	snd_pcm_lib_ioctl,
486 	.hw_params =	snd_als4000_hw_params,
487 	.hw_free =	snd_als4000_hw_free,
488 	.prepare =	snd_als4000_capture_prepare,
489 	.trigger =	snd_als4000_capture_trigger,
490 	.pointer =	snd_als4000_capture_pointer
491 };
492 
493 static void snd_als4000_pcm_free(snd_pcm_t *pcm)
494 {
495 	sb_t *chip = pcm->private_data;
496 	chip->pcm = NULL;
497 	snd_pcm_lib_preallocate_free_for_all(pcm);
498 }
499 
500 static int __devinit snd_als4000_pcm(sb_t *chip, int device)
501 {
502 	snd_pcm_t *pcm;
503 	int err;
504 
505 	if ((err = snd_pcm_new(chip->card, "ALS4000 DSP", device, 1, 1, &pcm)) < 0)
506 		return err;
507 	pcm->private_free = snd_als4000_pcm_free;
508 	pcm->private_data = chip;
509 	pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
510 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_als4000_playback_ops);
511 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_als4000_capture_ops);
512 
513 	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
514 					      64*1024, 64*1024);
515 
516 	chip->pcm = pcm;
517 
518 	return 0;
519 }
520 
521 /******************************************************************/
522 
523 static void snd_als4000_set_addr(unsigned long gcr,
524 					unsigned int sb,
525 					unsigned int mpu,
526 					unsigned int opl,
527 					unsigned int game)
528 {
529 	u32 confA = 0;
530 	u32 confB = 0;
531 
532 	if (mpu > 0)
533 		confB |= (mpu | 1) << 16;
534 	if (sb > 0)
535 		confB |= (sb | 1);
536 	if (game > 0)
537 		confA |= (game | 1) << 16;
538 	if (opl > 0)
539 		confA |= (opl | 1);
540 	snd_als4000_gcr_write_addr(gcr, 0xa8, confA);
541 	snd_als4000_gcr_write_addr(gcr, 0xa9, confB);
542 }
543 
544 static void __devinit snd_als4000_configure(sb_t *chip)
545 {
546 	unsigned tmp;
547 	int i;
548 
549 	/* do some more configuration */
550 	spin_lock_irq(&chip->mixer_lock);
551 	tmp = snd_sbmixer_read(chip, 0xc0);
552 	snd_sbmixer_write(chip, 0xc0, tmp|0x80);
553 	/* always select DMA channel 0, since we do not actually use DMA */
554 	snd_sbmixer_write(chip, SB_DSP4_DMASETUP, SB_DMASETUP_DMA0);
555 	snd_sbmixer_write(chip, 0xc0, tmp&0x7f);
556 	spin_unlock_irq(&chip->mixer_lock);
557 
558 	spin_lock_irq(&chip->reg_lock);
559 	/* magic number. Enables interrupts(?) */
560 	snd_als4000_gcr_write(chip, 0x8c, 0x28000);
561 	for(i = 0x91; i <= 0x96; ++i)
562 		snd_als4000_gcr_write(chip, i, 0);
563 
564 	snd_als4000_gcr_write(chip, 0x99, snd_als4000_gcr_read(chip, 0x99));
565 	spin_unlock_irq(&chip->reg_lock);
566 }
567 
568 #ifdef SUPPORT_JOYSTICK
569 static int __devinit snd_als4000_create_gameport(snd_card_als4000_t *acard, int dev)
570 {
571 	struct gameport *gp;
572 	struct resource *r;
573 	int io_port;
574 
575 	if (joystick_port[dev] == 0)
576 		return -ENODEV;
577 
578 	if (joystick_port[dev] == 1) { /* auto-detect */
579 		for (io_port = 0x200; io_port <= 0x218; io_port += 8) {
580 			r = request_region(io_port, 8, "ALS4000 gameport");
581 			if (r)
582 				break;
583 		}
584 	} else {
585 		io_port = joystick_port[dev];
586 		r = request_region(io_port, 8, "ALS4000 gameport");
587 	}
588 
589 	if (!r) {
590 		printk(KERN_WARNING "als4000: cannot reserve joystick ports\n");
591 		return -EBUSY;
592 	}
593 
594 	acard->gameport = gp = gameport_allocate_port();
595 	if (!gp) {
596 		printk(KERN_ERR "als4000: cannot allocate memory for gameport\n");
597 		release_resource(r);
598 		kfree_nocheck(r);
599 		return -ENOMEM;
600 	}
601 
602 	gameport_set_name(gp, "ALS4000 Gameport");
603 	gameport_set_phys(gp, "pci%s/gameport0", pci_name(acard->pci));
604 	gameport_set_dev_parent(gp, &acard->pci->dev);
605 	gp->io = io_port;
606 	gameport_set_port_data(gp, r);
607 
608 	/* Enable legacy joystick port */
609 	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 1);
610 
611 	gameport_register_port(acard->gameport);
612 
613 	return 0;
614 }
615 
616 static void snd_als4000_free_gameport(snd_card_als4000_t *acard)
617 {
618 	if (acard->gameport) {
619 		struct resource *r = gameport_get_port_data(acard->gameport);
620 
621 		gameport_unregister_port(acard->gameport);
622 		acard->gameport = NULL;
623 
624 		snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0); /* disable joystick */
625 		release_resource(r);
626 		kfree_nocheck(r);
627 	}
628 }
629 #else
630 static inline int snd_als4000_create_gameport(snd_card_als4000_t *acard, int dev) { return -ENOSYS; }
631 static inline void snd_als4000_free_gameport(snd_card_als4000_t *acard) { }
632 #endif
633 
634 static void snd_card_als4000_free( snd_card_t *card )
635 {
636 	snd_card_als4000_t * acard = (snd_card_als4000_t *)card->private_data;
637 
638 	/* make sure that interrupts are disabled */
639 	snd_als4000_gcr_write_addr( acard->gcr, 0x8c, 0);
640 	/* free resources */
641 	snd_als4000_free_gameport(acard);
642 	pci_release_regions(acard->pci);
643 	pci_disable_device(acard->pci);
644 }
645 
646 static int __devinit snd_card_als4000_probe(struct pci_dev *pci,
647 					  const struct pci_device_id *pci_id)
648 {
649 	static int dev;
650 	snd_card_t *card;
651 	snd_card_als4000_t *acard;
652 	unsigned long gcr;
653 	sb_t *chip;
654 	opl3_t *opl3;
655 	unsigned short word;
656 	int err;
657 
658 	if (dev >= SNDRV_CARDS)
659 		return -ENODEV;
660 	if (!enable[dev]) {
661 		dev++;
662 		return -ENOENT;
663 	}
664 
665 	/* enable PCI device */
666 	if ((err = pci_enable_device(pci)) < 0) {
667 		return err;
668 	}
669 	/* check, if we can restrict PCI DMA transfers to 24 bits */
670 	if (pci_set_dma_mask(pci, 0x00ffffff) < 0 ||
671 	    pci_set_consistent_dma_mask(pci, 0x00ffffff) < 0) {
672 		snd_printk("architecture does not support 24bit PCI busmaster DMA\n");
673 		pci_disable_device(pci);
674 		return -ENXIO;
675 	}
676 
677 	if ((err = pci_request_regions(pci, "ALS4000")) < 0) {
678 		pci_disable_device(pci);
679 		return err;
680 	}
681 	gcr = pci_resource_start(pci, 0);
682 
683 	pci_read_config_word(pci, PCI_COMMAND, &word);
684 	pci_write_config_word(pci, PCI_COMMAND, word | PCI_COMMAND_IO);
685 	pci_set_master(pci);
686 
687 	card = snd_card_new(index[dev], id[dev], THIS_MODULE,
688 			    sizeof( snd_card_als4000_t ) );
689 	if (card == NULL) {
690 		pci_release_regions(pci);
691 		pci_disable_device(pci);
692 		return -ENOMEM;
693 	}
694 
695 	acard = (snd_card_als4000_t *)card->private_data;
696 	acard->pci = pci;
697 	acard->gcr = gcr;
698 	card->private_free = snd_card_als4000_free;
699 
700 	/* disable all legacy ISA stuff */
701 	snd_als4000_set_addr(acard->gcr, 0, 0, 0, 0);
702 
703 	if ((err = snd_sbdsp_create(card,
704 				    gcr + 0x10,
705 				    pci->irq,
706 				    snd_als4000_interrupt,
707 				    -1,
708 				    -1,
709 				    SB_HW_ALS4000,
710 				    &chip)) < 0) {
711 		snd_card_free(card);
712 		return err;
713 	}
714 
715 	chip->pci = pci;
716 	chip->alt_port = gcr;
717 	snd_card_set_dev(card, &pci->dev);
718 
719 	snd_als4000_configure(chip);
720 
721 	strcpy(card->driver, "ALS4000");
722 	strcpy(card->shortname, "Avance Logic ALS4000");
723 	sprintf(card->longname, "%s at 0x%lx, irq %i",
724 		card->shortname, chip->alt_port, chip->irq);
725 
726 	if ((err = snd_mpu401_uart_new( card, 0, MPU401_HW_ALS4000,
727 				        gcr+0x30, 1, pci->irq, 0,
728 				        &chip->rmidi)) < 0) {
729 		snd_card_free(card);
730 		printk(KERN_ERR "als4000: no MPU-401device at 0x%lx ?\n", gcr+0x30);
731 		return err;
732 	}
733 
734 	if ((err = snd_als4000_pcm(chip, 0)) < 0) {
735 		snd_card_free(card);
736 		return err;
737 	}
738 	if ((err = snd_sbmixer_new(chip)) < 0) {
739 		snd_card_free(card);
740 		return err;
741 	}
742 
743 	if (snd_opl3_create(card, gcr+0x10, gcr+0x12,
744 			    OPL3_HW_AUTO, 1, &opl3) < 0) {
745 		printk(KERN_ERR "als4000: no OPL device at 0x%lx-0x%lx ?\n",
746 			   gcr+0x10, gcr+0x12 );
747 	} else {
748 		if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
749 			snd_card_free(card);
750 			return err;
751 		}
752 	}
753 
754 	snd_als4000_create_gameport(acard, dev);
755 
756 	if ((err = snd_card_register(card)) < 0) {
757 		snd_card_free(card);
758 		return err;
759 	}
760 	pci_set_drvdata(pci, card);
761 	dev++;
762 	return 0;
763 }
764 
765 static void __devexit snd_card_als4000_remove(struct pci_dev *pci)
766 {
767 	snd_card_free(pci_get_drvdata(pci));
768 	pci_set_drvdata(pci, NULL);
769 }
770 
771 static struct pci_driver driver = {
772 	.name = "ALS4000",
773 	.owner = THIS_MODULE,
774 	.id_table = snd_als4000_ids,
775 	.probe = snd_card_als4000_probe,
776 	.remove = __devexit_p(snd_card_als4000_remove),
777 };
778 
779 static int __init alsa_card_als4000_init(void)
780 {
781 	return pci_register_driver(&driver);
782 }
783 
784 static void __exit alsa_card_als4000_exit(void)
785 {
786 	pci_unregister_driver(&driver);
787 }
788 
789 module_init(alsa_card_als4000_init)
790 module_exit(alsa_card_als4000_exit)
791