xref: /openbmc/linux/sound/pci/es1938.c (revision 1c2dd16a)
1 /*
2  *  Driver for ESS Solo-1 (ES1938, ES1946, ES1969) soundcard
3  *  Copyright (c) by Jaromir Koutek <miri@punknet.cz>,
4  *                   Jaroslav Kysela <perex@perex.cz>,
5  *                   Thomas Sailer <sailer@ife.ee.ethz.ch>,
6  *                   Abramo Bagnara <abramo@alsa-project.org>,
7  *                   Markus Gruber <gruber@eikon.tum.de>
8  *
9  * Rewritten from sonicvibes.c source.
10  *
11  *  TODO:
12  *    Rewrite better spinlocks
13  *
14  *
15  *   This program is free software; you can redistribute it and/or modify
16  *   it under the terms of the GNU General Public License as published by
17  *   the Free Software Foundation; either version 2 of the License, or
18  *   (at your option) any later version.
19  *
20  *   This program is distributed in the hope that it will be useful,
21  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
22  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
23  *   GNU General Public License for more details.
24  *
25  *   You should have received a copy of the GNU General Public License
26  *   along with this program; if not, write to the Free Software
27  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
28  *
29  */
30 
31 /*
32   NOTES:
33   - Capture data is written unaligned starting from dma_base + 1 so I need to
34     disable mmap and to add a copy callback.
35   - After several cycle of the following:
36     while : ; do arecord -d1 -f cd -t raw | aplay -f cd ; done
37     a "playback write error (DMA or IRQ trouble?)" may happen.
38     This is due to playback interrupts not generated.
39     I suspect a timing issue.
40   - Sometimes the interrupt handler is invoked wrongly during playback.
41     This generates some harmless "Unexpected hw_pointer: wrong interrupt
42     acknowledge".
43     I've seen that using small period sizes.
44     Reproducible with:
45     mpg123 test.mp3 &
46     hdparm -t -T /dev/hda
47 */
48 
49 
50 #include <linux/init.h>
51 #include <linux/interrupt.h>
52 #include <linux/pci.h>
53 #include <linux/slab.h>
54 #include <linux/gameport.h>
55 #include <linux/module.h>
56 #include <linux/delay.h>
57 #include <linux/dma-mapping.h>
58 #include <linux/io.h>
59 #include <sound/core.h>
60 #include <sound/control.h>
61 #include <sound/pcm.h>
62 #include <sound/opl3.h>
63 #include <sound/mpu401.h>
64 #include <sound/initval.h>
65 #include <sound/tlv.h>
66 
67 MODULE_AUTHOR("Jaromir Koutek <miri@punknet.cz>");
68 MODULE_DESCRIPTION("ESS Solo-1");
69 MODULE_LICENSE("GPL");
70 MODULE_SUPPORTED_DEVICE("{{ESS,ES1938},"
71                 "{ESS,ES1946},"
72                 "{ESS,ES1969},"
73 		"{TerraTec,128i PCI}}");
74 
75 #if IS_REACHABLE(CONFIG_GAMEPORT)
76 #define SUPPORT_JOYSTICK 1
77 #endif
78 
79 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
80 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
81 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
82 
83 module_param_array(index, int, NULL, 0444);
84 MODULE_PARM_DESC(index, "Index value for ESS Solo-1 soundcard.");
85 module_param_array(id, charp, NULL, 0444);
86 MODULE_PARM_DESC(id, "ID string for ESS Solo-1 soundcard.");
87 module_param_array(enable, bool, NULL, 0444);
88 MODULE_PARM_DESC(enable, "Enable ESS Solo-1 soundcard.");
89 
90 #define SLIO_REG(chip, x) ((chip)->io_port + ESSIO_REG_##x)
91 
92 #define SLDM_REG(chip, x) ((chip)->ddma_port + ESSDM_REG_##x)
93 
94 #define SLSB_REG(chip, x) ((chip)->sb_port + ESSSB_REG_##x)
95 
96 #define SL_PCI_LEGACYCONTROL		0x40
97 #define SL_PCI_CONFIG			0x50
98 #define SL_PCI_DDMACONTROL		0x60
99 
100 #define ESSIO_REG_AUDIO2DMAADDR		0
101 #define ESSIO_REG_AUDIO2DMACOUNT	4
102 #define ESSIO_REG_AUDIO2MODE		6
103 #define ESSIO_REG_IRQCONTROL		7
104 
105 #define ESSDM_REG_DMAADDR		0x00
106 #define ESSDM_REG_DMACOUNT		0x04
107 #define ESSDM_REG_DMACOMMAND		0x08
108 #define ESSDM_REG_DMASTATUS		0x08
109 #define ESSDM_REG_DMAMODE		0x0b
110 #define ESSDM_REG_DMACLEAR		0x0d
111 #define ESSDM_REG_DMAMASK		0x0f
112 
113 #define ESSSB_REG_FMLOWADDR		0x00
114 #define ESSSB_REG_FMHIGHADDR		0x02
115 #define ESSSB_REG_MIXERADDR		0x04
116 #define ESSSB_REG_MIXERDATA		0x05
117 
118 #define ESSSB_IREG_AUDIO1		0x14
119 #define ESSSB_IREG_MICMIX		0x1a
120 #define ESSSB_IREG_RECSRC		0x1c
121 #define ESSSB_IREG_MASTER		0x32
122 #define ESSSB_IREG_FM			0x36
123 #define ESSSB_IREG_AUXACD		0x38
124 #define ESSSB_IREG_AUXB			0x3a
125 #define ESSSB_IREG_PCSPEAKER		0x3c
126 #define ESSSB_IREG_LINE			0x3e
127 #define ESSSB_IREG_SPATCONTROL		0x50
128 #define ESSSB_IREG_SPATLEVEL		0x52
129 #define ESSSB_IREG_MASTER_LEFT		0x60
130 #define ESSSB_IREG_MASTER_RIGHT		0x62
131 #define ESSSB_IREG_MPU401CONTROL	0x64
132 #define ESSSB_IREG_MICMIXRECORD		0x68
133 #define ESSSB_IREG_AUDIO2RECORD		0x69
134 #define ESSSB_IREG_AUXACDRECORD		0x6a
135 #define ESSSB_IREG_FMRECORD		0x6b
136 #define ESSSB_IREG_AUXBRECORD		0x6c
137 #define ESSSB_IREG_MONO			0x6d
138 #define ESSSB_IREG_LINERECORD		0x6e
139 #define ESSSB_IREG_MONORECORD		0x6f
140 #define ESSSB_IREG_AUDIO2SAMPLE		0x70
141 #define ESSSB_IREG_AUDIO2MODE		0x71
142 #define ESSSB_IREG_AUDIO2FILTER		0x72
143 #define ESSSB_IREG_AUDIO2TCOUNTL	0x74
144 #define ESSSB_IREG_AUDIO2TCOUNTH	0x76
145 #define ESSSB_IREG_AUDIO2CONTROL1	0x78
146 #define ESSSB_IREG_AUDIO2CONTROL2	0x7a
147 #define ESSSB_IREG_AUDIO2		0x7c
148 
149 #define ESSSB_REG_RESET			0x06
150 
151 #define ESSSB_REG_READDATA		0x0a
152 #define ESSSB_REG_WRITEDATA		0x0c
153 #define ESSSB_REG_READSTATUS		0x0c
154 
155 #define ESSSB_REG_STATUS		0x0e
156 
157 #define ESS_CMD_EXTSAMPLERATE		0xa1
158 #define ESS_CMD_FILTERDIV		0xa2
159 #define ESS_CMD_DMACNTRELOADL		0xa4
160 #define ESS_CMD_DMACNTRELOADH		0xa5
161 #define ESS_CMD_ANALOGCONTROL		0xa8
162 #define ESS_CMD_IRQCONTROL		0xb1
163 #define ESS_CMD_DRQCONTROL		0xb2
164 #define ESS_CMD_RECLEVEL		0xb4
165 #define ESS_CMD_SETFORMAT		0xb6
166 #define ESS_CMD_SETFORMAT2		0xb7
167 #define ESS_CMD_DMACONTROL		0xb8
168 #define ESS_CMD_DMATYPE			0xb9
169 #define ESS_CMD_OFFSETLEFT		0xba
170 #define ESS_CMD_OFFSETRIGHT		0xbb
171 #define ESS_CMD_READREG			0xc0
172 #define ESS_CMD_ENABLEEXT		0xc6
173 #define ESS_CMD_PAUSEDMA		0xd0
174 #define ESS_CMD_ENABLEAUDIO1		0xd1
175 #define ESS_CMD_STOPAUDIO1		0xd3
176 #define ESS_CMD_AUDIO1STATUS		0xd8
177 #define ESS_CMD_CONTDMA			0xd4
178 #define ESS_CMD_TESTIRQ			0xf2
179 
180 #define ESS_RECSRC_MIC		0
181 #define ESS_RECSRC_AUXACD	2
182 #define ESS_RECSRC_AUXB		5
183 #define ESS_RECSRC_LINE		6
184 #define ESS_RECSRC_NONE		7
185 
186 #define DAC1 0x01
187 #define ADC1 0x02
188 #define DAC2 0x04
189 
190 /*
191 
192  */
193 
194 #define SAVED_REG_SIZE	32 /* max. number of registers to save */
195 
196 struct es1938 {
197 	int irq;
198 
199 	unsigned long io_port;
200 	unsigned long sb_port;
201 	unsigned long vc_port;
202 	unsigned long mpu_port;
203 	unsigned long game_port;
204 	unsigned long ddma_port;
205 
206 	unsigned char irqmask;
207 	unsigned char revision;
208 
209 	struct snd_kcontrol *hw_volume;
210 	struct snd_kcontrol *hw_switch;
211 	struct snd_kcontrol *master_volume;
212 	struct snd_kcontrol *master_switch;
213 
214 	struct pci_dev *pci;
215 	struct snd_card *card;
216 	struct snd_pcm *pcm;
217 	struct snd_pcm_substream *capture_substream;
218 	struct snd_pcm_substream *playback1_substream;
219 	struct snd_pcm_substream *playback2_substream;
220 	struct snd_rawmidi *rmidi;
221 
222 	unsigned int dma1_size;
223 	unsigned int dma2_size;
224 	unsigned int dma1_start;
225 	unsigned int dma2_start;
226 	unsigned int dma1_shift;
227 	unsigned int dma2_shift;
228 	unsigned int last_capture_dmaaddr;
229 	unsigned int active;
230 
231 	spinlock_t reg_lock;
232 	spinlock_t mixer_lock;
233         struct snd_info_entry *proc_entry;
234 
235 #ifdef SUPPORT_JOYSTICK
236 	struct gameport *gameport;
237 #endif
238 #ifdef CONFIG_PM_SLEEP
239 	unsigned char saved_regs[SAVED_REG_SIZE];
240 #endif
241 };
242 
243 static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id);
244 
245 static const struct pci_device_id snd_es1938_ids[] = {
246 	{ PCI_VDEVICE(ESS, 0x1969), 0, },   /* Solo-1 */
247 	{ 0, }
248 };
249 
250 MODULE_DEVICE_TABLE(pci, snd_es1938_ids);
251 
252 #define RESET_LOOP_TIMEOUT	0x10000
253 #define WRITE_LOOP_TIMEOUT	0x10000
254 #define GET_LOOP_TIMEOUT	0x01000
255 
256 /* -----------------------------------------------------------------
257  * Write to a mixer register
258  * -----------------------------------------------------------------*/
259 static void snd_es1938_mixer_write(struct es1938 *chip, unsigned char reg, unsigned char val)
260 {
261 	unsigned long flags;
262 	spin_lock_irqsave(&chip->mixer_lock, flags);
263 	outb(reg, SLSB_REG(chip, MIXERADDR));
264 	outb(val, SLSB_REG(chip, MIXERDATA));
265 	spin_unlock_irqrestore(&chip->mixer_lock, flags);
266 	dev_dbg(chip->card->dev, "Mixer reg %02x set to %02x\n", reg, val);
267 }
268 
269 /* -----------------------------------------------------------------
270  * Read from a mixer register
271  * -----------------------------------------------------------------*/
272 static int snd_es1938_mixer_read(struct es1938 *chip, unsigned char reg)
273 {
274 	int data;
275 	unsigned long flags;
276 	spin_lock_irqsave(&chip->mixer_lock, flags);
277 	outb(reg, SLSB_REG(chip, MIXERADDR));
278 	data = inb(SLSB_REG(chip, MIXERDATA));
279 	spin_unlock_irqrestore(&chip->mixer_lock, flags);
280 	dev_dbg(chip->card->dev, "Mixer reg %02x now is %02x\n", reg, data);
281 	return data;
282 }
283 
284 /* -----------------------------------------------------------------
285  * Write to some bits of a mixer register (return old value)
286  * -----------------------------------------------------------------*/
287 static int snd_es1938_mixer_bits(struct es1938 *chip, unsigned char reg,
288 				 unsigned char mask, unsigned char val)
289 {
290 	unsigned long flags;
291 	unsigned char old, new, oval;
292 	spin_lock_irqsave(&chip->mixer_lock, flags);
293 	outb(reg, SLSB_REG(chip, MIXERADDR));
294 	old = inb(SLSB_REG(chip, MIXERDATA));
295 	oval = old & mask;
296 	if (val != oval) {
297 		new = (old & ~mask) | (val & mask);
298 		outb(new, SLSB_REG(chip, MIXERDATA));
299 		dev_dbg(chip->card->dev,
300 			"Mixer reg %02x was %02x, set to %02x\n",
301 			   reg, old, new);
302 	}
303 	spin_unlock_irqrestore(&chip->mixer_lock, flags);
304 	return oval;
305 }
306 
307 /* -----------------------------------------------------------------
308  * Write command to Controller Registers
309  * -----------------------------------------------------------------*/
310 static void snd_es1938_write_cmd(struct es1938 *chip, unsigned char cmd)
311 {
312 	int i;
313 	unsigned char v;
314 	for (i = 0; i < WRITE_LOOP_TIMEOUT; i++) {
315 		if (!(v = inb(SLSB_REG(chip, READSTATUS)) & 0x80)) {
316 			outb(cmd, SLSB_REG(chip, WRITEDATA));
317 			return;
318 		}
319 	}
320 	dev_err(chip->card->dev,
321 		"snd_es1938_write_cmd timeout (0x02%x/0x02%x)\n", cmd, v);
322 }
323 
324 /* -----------------------------------------------------------------
325  * Read the Read Data Buffer
326  * -----------------------------------------------------------------*/
327 static int snd_es1938_get_byte(struct es1938 *chip)
328 {
329 	int i;
330 	unsigned char v;
331 	for (i = GET_LOOP_TIMEOUT; i; i--)
332 		if ((v = inb(SLSB_REG(chip, STATUS))) & 0x80)
333 			return inb(SLSB_REG(chip, READDATA));
334 	dev_err(chip->card->dev, "get_byte timeout: status 0x02%x\n", v);
335 	return -ENODEV;
336 }
337 
338 /* -----------------------------------------------------------------
339  * Write value cmd register
340  * -----------------------------------------------------------------*/
341 static void snd_es1938_write(struct es1938 *chip, unsigned char reg, unsigned char val)
342 {
343 	unsigned long flags;
344 	spin_lock_irqsave(&chip->reg_lock, flags);
345 	snd_es1938_write_cmd(chip, reg);
346 	snd_es1938_write_cmd(chip, val);
347 	spin_unlock_irqrestore(&chip->reg_lock, flags);
348 	dev_dbg(chip->card->dev, "Reg %02x set to %02x\n", reg, val);
349 }
350 
351 /* -----------------------------------------------------------------
352  * Read data from cmd register and return it
353  * -----------------------------------------------------------------*/
354 static unsigned char snd_es1938_read(struct es1938 *chip, unsigned char reg)
355 {
356 	unsigned char val;
357 	unsigned long flags;
358 	spin_lock_irqsave(&chip->reg_lock, flags);
359 	snd_es1938_write_cmd(chip, ESS_CMD_READREG);
360 	snd_es1938_write_cmd(chip, reg);
361 	val = snd_es1938_get_byte(chip);
362 	spin_unlock_irqrestore(&chip->reg_lock, flags);
363 	dev_dbg(chip->card->dev, "Reg %02x now is %02x\n", reg, val);
364 	return val;
365 }
366 
367 /* -----------------------------------------------------------------
368  * Write data to cmd register and return old value
369  * -----------------------------------------------------------------*/
370 static int snd_es1938_bits(struct es1938 *chip, unsigned char reg, unsigned char mask,
371 			   unsigned char val)
372 {
373 	unsigned long flags;
374 	unsigned char old, new, oval;
375 	spin_lock_irqsave(&chip->reg_lock, flags);
376 	snd_es1938_write_cmd(chip, ESS_CMD_READREG);
377 	snd_es1938_write_cmd(chip, reg);
378 	old = snd_es1938_get_byte(chip);
379 	oval = old & mask;
380 	if (val != oval) {
381 		snd_es1938_write_cmd(chip, reg);
382 		new = (old & ~mask) | (val & mask);
383 		snd_es1938_write_cmd(chip, new);
384 		dev_dbg(chip->card->dev, "Reg %02x was %02x, set to %02x\n",
385 			   reg, old, new);
386 	}
387 	spin_unlock_irqrestore(&chip->reg_lock, flags);
388 	return oval;
389 }
390 
391 /* --------------------------------------------------------------------
392  * Reset the chip
393  * --------------------------------------------------------------------*/
394 static void snd_es1938_reset(struct es1938 *chip)
395 {
396 	int i;
397 
398 	outb(3, SLSB_REG(chip, RESET));
399 	inb(SLSB_REG(chip, RESET));
400 	outb(0, SLSB_REG(chip, RESET));
401 	for (i = 0; i < RESET_LOOP_TIMEOUT; i++) {
402 		if (inb(SLSB_REG(chip, STATUS)) & 0x80) {
403 			if (inb(SLSB_REG(chip, READDATA)) == 0xaa)
404 				goto __next;
405 		}
406 	}
407 	dev_err(chip->card->dev, "ESS Solo-1 reset failed\n");
408 
409      __next:
410 	snd_es1938_write_cmd(chip, ESS_CMD_ENABLEEXT);
411 
412 	/* Demand transfer DMA: 4 bytes per DMA request */
413 	snd_es1938_write(chip, ESS_CMD_DMATYPE, 2);
414 
415 	/* Change behaviour of register A1
416 	   4x oversampling
417 	   2nd channel DAC asynchronous */
418 	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2MODE, 0x32);
419 	/* enable/select DMA channel and IRQ channel */
420 	snd_es1938_bits(chip, ESS_CMD_IRQCONTROL, 0xf0, 0x50);
421 	snd_es1938_bits(chip, ESS_CMD_DRQCONTROL, 0xf0, 0x50);
422 	snd_es1938_write_cmd(chip, ESS_CMD_ENABLEAUDIO1);
423 	/* Set spatializer parameters to recommended values */
424 	snd_es1938_mixer_write(chip, 0x54, 0x8f);
425 	snd_es1938_mixer_write(chip, 0x56, 0x95);
426 	snd_es1938_mixer_write(chip, 0x58, 0x94);
427 	snd_es1938_mixer_write(chip, 0x5a, 0x80);
428 }
429 
430 /* --------------------------------------------------------------------
431  * Reset the FIFOs
432  * --------------------------------------------------------------------*/
433 static void snd_es1938_reset_fifo(struct es1938 *chip)
434 {
435 	outb(2, SLSB_REG(chip, RESET));
436 	outb(0, SLSB_REG(chip, RESET));
437 }
438 
439 static struct snd_ratnum clocks[2] = {
440 	{
441 		.num = 793800,
442 		.den_min = 1,
443 		.den_max = 128,
444 		.den_step = 1,
445 	},
446 	{
447 		.num = 768000,
448 		.den_min = 1,
449 		.den_max = 128,
450 		.den_step = 1,
451 	}
452 };
453 
454 static struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks = {
455 	.nrats = 2,
456 	.rats = clocks,
457 };
458 
459 
460 static void snd_es1938_rate_set(struct es1938 *chip,
461 				struct snd_pcm_substream *substream,
462 				int mode)
463 {
464 	unsigned int bits, div0;
465 	struct snd_pcm_runtime *runtime = substream->runtime;
466 	if (runtime->rate_num == clocks[0].num)
467 		bits = 128 - runtime->rate_den;
468 	else
469 		bits = 256 - runtime->rate_den;
470 
471 	/* set filter register */
472 	div0 = 256 - 7160000*20/(8*82*runtime->rate);
473 
474 	if (mode == DAC2) {
475 		snd_es1938_mixer_write(chip, 0x70, bits);
476 		snd_es1938_mixer_write(chip, 0x72, div0);
477 	} else {
478 		snd_es1938_write(chip, 0xA1, bits);
479 		snd_es1938_write(chip, 0xA2, div0);
480 	}
481 }
482 
483 /* --------------------------------------------------------------------
484  * Configure Solo1 builtin DMA Controller
485  * --------------------------------------------------------------------*/
486 
487 static void snd_es1938_playback1_setdma(struct es1938 *chip)
488 {
489 	outb(0x00, SLIO_REG(chip, AUDIO2MODE));
490 	outl(chip->dma2_start, SLIO_REG(chip, AUDIO2DMAADDR));
491 	outw(0, SLIO_REG(chip, AUDIO2DMACOUNT));
492 	outw(chip->dma2_size, SLIO_REG(chip, AUDIO2DMACOUNT));
493 }
494 
495 static void snd_es1938_playback2_setdma(struct es1938 *chip)
496 {
497 	/* Enable DMA controller */
498 	outb(0xc4, SLDM_REG(chip, DMACOMMAND));
499 	/* 1. Master reset */
500 	outb(0, SLDM_REG(chip, DMACLEAR));
501 	/* 2. Mask DMA */
502 	outb(1, SLDM_REG(chip, DMAMASK));
503 	outb(0x18, SLDM_REG(chip, DMAMODE));
504 	outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
505 	outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
506 	/* 3. Unmask DMA */
507 	outb(0, SLDM_REG(chip, DMAMASK));
508 }
509 
510 static void snd_es1938_capture_setdma(struct es1938 *chip)
511 {
512 	/* Enable DMA controller */
513 	outb(0xc4, SLDM_REG(chip, DMACOMMAND));
514 	/* 1. Master reset */
515 	outb(0, SLDM_REG(chip, DMACLEAR));
516 	/* 2. Mask DMA */
517 	outb(1, SLDM_REG(chip, DMAMASK));
518 	outb(0x14, SLDM_REG(chip, DMAMODE));
519 	outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
520 	chip->last_capture_dmaaddr = chip->dma1_start;
521 	outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
522 	/* 3. Unmask DMA */
523 	outb(0, SLDM_REG(chip, DMAMASK));
524 }
525 
526 /* ----------------------------------------------------------------------
527  *
528  *                           *** PCM part ***
529  */
530 
531 static int snd_es1938_capture_trigger(struct snd_pcm_substream *substream,
532 				      int cmd)
533 {
534 	struct es1938 *chip = snd_pcm_substream_chip(substream);
535 	int val;
536 	switch (cmd) {
537 	case SNDRV_PCM_TRIGGER_START:
538 	case SNDRV_PCM_TRIGGER_RESUME:
539 		val = 0x0f;
540 		chip->active |= ADC1;
541 		break;
542 	case SNDRV_PCM_TRIGGER_STOP:
543 	case SNDRV_PCM_TRIGGER_SUSPEND:
544 		val = 0x00;
545 		chip->active &= ~ADC1;
546 		break;
547 	default:
548 		return -EINVAL;
549 	}
550 	snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
551 	return 0;
552 }
553 
554 static int snd_es1938_playback1_trigger(struct snd_pcm_substream *substream,
555 					int cmd)
556 {
557 	struct es1938 *chip = snd_pcm_substream_chip(substream);
558 	switch (cmd) {
559 	case SNDRV_PCM_TRIGGER_START:
560 	case SNDRV_PCM_TRIGGER_RESUME:
561 		/* According to the documentation this should be:
562 		   0x13 but that value may randomly swap stereo channels */
563                 snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x92);
564                 udelay(10);
565 		snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x93);
566                 /* This two stage init gives the FIFO -> DAC connection time to
567                  * settle before first data from DMA flows in.  This should ensure
568                  * no swapping of stereo channels.  Report a bug if otherwise :-) */
569 		outb(0x0a, SLIO_REG(chip, AUDIO2MODE));
570 		chip->active |= DAC2;
571 		break;
572 	case SNDRV_PCM_TRIGGER_STOP:
573 	case SNDRV_PCM_TRIGGER_SUSPEND:
574 		outb(0, SLIO_REG(chip, AUDIO2MODE));
575 		snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0);
576 		chip->active &= ~DAC2;
577 		break;
578 	default:
579 		return -EINVAL;
580 	}
581 	return 0;
582 }
583 
584 static int snd_es1938_playback2_trigger(struct snd_pcm_substream *substream,
585 					int cmd)
586 {
587 	struct es1938 *chip = snd_pcm_substream_chip(substream);
588 	int val;
589 	switch (cmd) {
590 	case SNDRV_PCM_TRIGGER_START:
591 	case SNDRV_PCM_TRIGGER_RESUME:
592 		val = 5;
593 		chip->active |= DAC1;
594 		break;
595 	case SNDRV_PCM_TRIGGER_STOP:
596 	case SNDRV_PCM_TRIGGER_SUSPEND:
597 		val = 0;
598 		chip->active &= ~DAC1;
599 		break;
600 	default:
601 		return -EINVAL;
602 	}
603 	snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
604 	return 0;
605 }
606 
607 static int snd_es1938_playback_trigger(struct snd_pcm_substream *substream,
608 				       int cmd)
609 {
610 	switch (substream->number) {
611 	case 0:
612 		return snd_es1938_playback1_trigger(substream, cmd);
613 	case 1:
614 		return snd_es1938_playback2_trigger(substream, cmd);
615 	}
616 	snd_BUG();
617 	return -EINVAL;
618 }
619 
620 /* --------------------------------------------------------------------
621  * First channel for Extended Mode Audio 1 ADC Operation
622  * --------------------------------------------------------------------*/
623 static int snd_es1938_capture_prepare(struct snd_pcm_substream *substream)
624 {
625 	struct es1938 *chip = snd_pcm_substream_chip(substream);
626 	struct snd_pcm_runtime *runtime = substream->runtime;
627 	int u, is8, mono;
628 	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
629 	unsigned int count = snd_pcm_lib_period_bytes(substream);
630 
631 	chip->dma1_size = size;
632 	chip->dma1_start = runtime->dma_addr;
633 
634 	mono = (runtime->channels > 1) ? 0 : 1;
635 	is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
636 	u = snd_pcm_format_unsigned(runtime->format);
637 
638 	chip->dma1_shift = 2 - mono - is8;
639 
640 	snd_es1938_reset_fifo(chip);
641 
642 	/* program type */
643 	snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
644 
645 	/* set clock and counters */
646         snd_es1938_rate_set(chip, substream, ADC1);
647 
648 	count = 0x10000 - count;
649 	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
650 	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
651 
652 	/* initialize and configure ADC */
653 	snd_es1938_write(chip, ESS_CMD_SETFORMAT2, u ? 0x51 : 0x71);
654 	snd_es1938_write(chip, ESS_CMD_SETFORMAT2, 0x90 |
655 		       (u ? 0x00 : 0x20) |
656 		       (is8 ? 0x00 : 0x04) |
657 		       (mono ? 0x40 : 0x08));
658 
659 	//	snd_es1938_reset_fifo(chip);
660 
661 	/* 11. configure system interrupt controller and DMA controller */
662 	snd_es1938_capture_setdma(chip);
663 
664 	return 0;
665 }
666 
667 
668 /* ------------------------------------------------------------------------------
669  * Second Audio channel DAC Operation
670  * ------------------------------------------------------------------------------*/
671 static int snd_es1938_playback1_prepare(struct snd_pcm_substream *substream)
672 {
673 	struct es1938 *chip = snd_pcm_substream_chip(substream);
674 	struct snd_pcm_runtime *runtime = substream->runtime;
675 	int u, is8, mono;
676 	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
677 	unsigned int count = snd_pcm_lib_period_bytes(substream);
678 
679 	chip->dma2_size = size;
680 	chip->dma2_start = runtime->dma_addr;
681 
682 	mono = (runtime->channels > 1) ? 0 : 1;
683 	is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
684 	u = snd_pcm_format_unsigned(runtime->format);
685 
686 	chip->dma2_shift = 2 - mono - is8;
687 
688         snd_es1938_reset_fifo(chip);
689 
690 	/* set clock and counters */
691         snd_es1938_rate_set(chip, substream, DAC2);
692 
693 	count >>= 1;
694 	count = 0x10000 - count;
695 	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTL, count & 0xff);
696 	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTH, count >> 8);
697 
698 	/* initialize and configure Audio 2 DAC */
699 	snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x40 | (u ? 0 : 4) |
700 			       (mono ? 0 : 2) | (is8 ? 0 : 1));
701 
702 	/* program DMA */
703 	snd_es1938_playback1_setdma(chip);
704 
705 	return 0;
706 }
707 
708 static int snd_es1938_playback2_prepare(struct snd_pcm_substream *substream)
709 {
710 	struct es1938 *chip = snd_pcm_substream_chip(substream);
711 	struct snd_pcm_runtime *runtime = substream->runtime;
712 	int u, is8, mono;
713 	unsigned int size = snd_pcm_lib_buffer_bytes(substream);
714 	unsigned int count = snd_pcm_lib_period_bytes(substream);
715 
716 	chip->dma1_size = size;
717 	chip->dma1_start = runtime->dma_addr;
718 
719 	mono = (runtime->channels > 1) ? 0 : 1;
720 	is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
721 	u = snd_pcm_format_unsigned(runtime->format);
722 
723 	chip->dma1_shift = 2 - mono - is8;
724 
725 	count = 0x10000 - count;
726 
727 	/* reset */
728 	snd_es1938_reset_fifo(chip);
729 
730 	snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
731 
732 	/* set clock and counters */
733         snd_es1938_rate_set(chip, substream, DAC1);
734 	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
735 	snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
736 
737 	/* initialized and configure DAC */
738         snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x80 : 0x00);
739         snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x51 : 0x71);
740         snd_es1938_write(chip, ESS_CMD_SETFORMAT2,
741 			 0x90 | (mono ? 0x40 : 0x08) |
742 			 (is8 ? 0x00 : 0x04) | (u ? 0x00 : 0x20));
743 
744 	/* program DMA */
745 	snd_es1938_playback2_setdma(chip);
746 
747 	return 0;
748 }
749 
750 static int snd_es1938_playback_prepare(struct snd_pcm_substream *substream)
751 {
752 	switch (substream->number) {
753 	case 0:
754 		return snd_es1938_playback1_prepare(substream);
755 	case 1:
756 		return snd_es1938_playback2_prepare(substream);
757 	}
758 	snd_BUG();
759 	return -EINVAL;
760 }
761 
762 /* during the incrementing of dma counters the DMA register reads sometimes
763    returns garbage. To ensure a valid hw pointer, the following checks which
764    should be very unlikely to fail are used:
765    - is the current DMA address in the valid DMA range ?
766    - is the sum of DMA address and DMA counter pointing to the last DMA byte ?
767    One can argue this could differ by one byte depending on which register is
768    updated first, so the implementation below allows for that.
769 */
770 static snd_pcm_uframes_t snd_es1938_capture_pointer(struct snd_pcm_substream *substream)
771 {
772 	struct es1938 *chip = snd_pcm_substream_chip(substream);
773 	size_t ptr;
774 #if 0
775 	size_t old, new;
776 	/* This stuff is *needed*, don't ask why - AB */
777 	old = inw(SLDM_REG(chip, DMACOUNT));
778 	while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
779 		old = new;
780 	ptr = chip->dma1_size - 1 - new;
781 #else
782 	size_t count;
783 	unsigned int diff;
784 
785 	ptr = inl(SLDM_REG(chip, DMAADDR));
786 	count = inw(SLDM_REG(chip, DMACOUNT));
787 	diff = chip->dma1_start + chip->dma1_size - ptr - count;
788 
789 	if (diff > 3 || ptr < chip->dma1_start
790 	      || ptr >= chip->dma1_start+chip->dma1_size)
791 	  ptr = chip->last_capture_dmaaddr;            /* bad, use last saved */
792 	else
793 	  chip->last_capture_dmaaddr = ptr;            /* good, remember it */
794 
795 	ptr -= chip->dma1_start;
796 #endif
797 	return ptr >> chip->dma1_shift;
798 }
799 
800 static snd_pcm_uframes_t snd_es1938_playback1_pointer(struct snd_pcm_substream *substream)
801 {
802 	struct es1938 *chip = snd_pcm_substream_chip(substream);
803 	size_t ptr;
804 #if 1
805 	ptr = chip->dma2_size - inw(SLIO_REG(chip, AUDIO2DMACOUNT));
806 #else
807 	ptr = inl(SLIO_REG(chip, AUDIO2DMAADDR)) - chip->dma2_start;
808 #endif
809 	return ptr >> chip->dma2_shift;
810 }
811 
812 static snd_pcm_uframes_t snd_es1938_playback2_pointer(struct snd_pcm_substream *substream)
813 {
814 	struct es1938 *chip = snd_pcm_substream_chip(substream);
815 	size_t ptr;
816 	size_t old, new;
817 #if 1
818 	/* This stuff is *needed*, don't ask why - AB */
819 	old = inw(SLDM_REG(chip, DMACOUNT));
820 	while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
821 		old = new;
822 	ptr = chip->dma1_size - 1 - new;
823 #else
824 	ptr = inl(SLDM_REG(chip, DMAADDR)) - chip->dma1_start;
825 #endif
826 	return ptr >> chip->dma1_shift;
827 }
828 
829 static snd_pcm_uframes_t snd_es1938_playback_pointer(struct snd_pcm_substream *substream)
830 {
831 	switch (substream->number) {
832 	case 0:
833 		return snd_es1938_playback1_pointer(substream);
834 	case 1:
835 		return snd_es1938_playback2_pointer(substream);
836 	}
837 	snd_BUG();
838 	return -EINVAL;
839 }
840 
841 static int snd_es1938_capture_copy(struct snd_pcm_substream *substream,
842 				   int channel,
843 				   snd_pcm_uframes_t pos,
844 				   void __user *dst,
845 				   snd_pcm_uframes_t count)
846 {
847 	struct snd_pcm_runtime *runtime = substream->runtime;
848 	struct es1938 *chip = snd_pcm_substream_chip(substream);
849 	pos <<= chip->dma1_shift;
850 	count <<= chip->dma1_shift;
851 	if (snd_BUG_ON(pos + count > chip->dma1_size))
852 		return -EINVAL;
853 	if (pos + count < chip->dma1_size) {
854 		if (copy_to_user(dst, runtime->dma_area + pos + 1, count))
855 			return -EFAULT;
856 	} else {
857 		if (copy_to_user(dst, runtime->dma_area + pos + 1, count - 1))
858 			return -EFAULT;
859 		if (put_user(runtime->dma_area[0], ((unsigned char __user *)dst) + count - 1))
860 			return -EFAULT;
861 	}
862 	return 0;
863 }
864 
865 /*
866  * buffer management
867  */
868 static int snd_es1938_pcm_hw_params(struct snd_pcm_substream *substream,
869 				    struct snd_pcm_hw_params *hw_params)
870 
871 {
872 	int err;
873 
874 	if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
875 		return err;
876 	return 0;
877 }
878 
879 static int snd_es1938_pcm_hw_free(struct snd_pcm_substream *substream)
880 {
881 	return snd_pcm_lib_free_pages(substream);
882 }
883 
884 /* ----------------------------------------------------------------------
885  * Audio1 Capture (ADC)
886  * ----------------------------------------------------------------------*/
887 static struct snd_pcm_hardware snd_es1938_capture =
888 {
889 	.info =			(SNDRV_PCM_INFO_INTERLEAVED |
890 				SNDRV_PCM_INFO_BLOCK_TRANSFER),
891 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
892 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
893 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
894 	.rate_min =		6000,
895 	.rate_max =		48000,
896 	.channels_min =		1,
897 	.channels_max =		2,
898         .buffer_bytes_max =	0x8000,       /* DMA controller screws on higher values */
899 	.period_bytes_min =	64,
900 	.period_bytes_max =	0x8000,
901 	.periods_min =		1,
902 	.periods_max =		1024,
903 	.fifo_size =		256,
904 };
905 
906 /* -----------------------------------------------------------------------
907  * Audio2 Playback (DAC)
908  * -----------------------------------------------------------------------*/
909 static struct snd_pcm_hardware snd_es1938_playback =
910 {
911 	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
912 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
913 				 SNDRV_PCM_INFO_MMAP_VALID),
914 	.formats =		(SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
915 				 SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
916 	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
917 	.rate_min =		6000,
918 	.rate_max =		48000,
919 	.channels_min =		1,
920 	.channels_max =		2,
921         .buffer_bytes_max =	0x8000,       /* DMA controller screws on higher values */
922 	.period_bytes_min =	64,
923 	.period_bytes_max =	0x8000,
924 	.periods_min =		1,
925 	.periods_max =		1024,
926 	.fifo_size =		256,
927 };
928 
929 static int snd_es1938_capture_open(struct snd_pcm_substream *substream)
930 {
931 	struct es1938 *chip = snd_pcm_substream_chip(substream);
932 	struct snd_pcm_runtime *runtime = substream->runtime;
933 
934 	if (chip->playback2_substream)
935 		return -EAGAIN;
936 	chip->capture_substream = substream;
937 	runtime->hw = snd_es1938_capture;
938 	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
939 				      &hw_constraints_clocks);
940 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
941 	return 0;
942 }
943 
944 static int snd_es1938_playback_open(struct snd_pcm_substream *substream)
945 {
946 	struct es1938 *chip = snd_pcm_substream_chip(substream);
947 	struct snd_pcm_runtime *runtime = substream->runtime;
948 
949 	switch (substream->number) {
950 	case 0:
951 		chip->playback1_substream = substream;
952 		break;
953 	case 1:
954 		if (chip->capture_substream)
955 			return -EAGAIN;
956 		chip->playback2_substream = substream;
957 		break;
958 	default:
959 		snd_BUG();
960 		return -EINVAL;
961 	}
962 	runtime->hw = snd_es1938_playback;
963 	snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
964 				      &hw_constraints_clocks);
965 	snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
966 	return 0;
967 }
968 
969 static int snd_es1938_capture_close(struct snd_pcm_substream *substream)
970 {
971 	struct es1938 *chip = snd_pcm_substream_chip(substream);
972 
973 	chip->capture_substream = NULL;
974 	return 0;
975 }
976 
977 static int snd_es1938_playback_close(struct snd_pcm_substream *substream)
978 {
979 	struct es1938 *chip = snd_pcm_substream_chip(substream);
980 
981 	switch (substream->number) {
982 	case 0:
983 		chip->playback1_substream = NULL;
984 		break;
985 	case 1:
986 		chip->playback2_substream = NULL;
987 		break;
988 	default:
989 		snd_BUG();
990 		return -EINVAL;
991 	}
992 	return 0;
993 }
994 
995 static const struct snd_pcm_ops snd_es1938_playback_ops = {
996 	.open =		snd_es1938_playback_open,
997 	.close =	snd_es1938_playback_close,
998 	.ioctl =	snd_pcm_lib_ioctl,
999 	.hw_params =	snd_es1938_pcm_hw_params,
1000 	.hw_free =	snd_es1938_pcm_hw_free,
1001 	.prepare =	snd_es1938_playback_prepare,
1002 	.trigger =	snd_es1938_playback_trigger,
1003 	.pointer =	snd_es1938_playback_pointer,
1004 };
1005 
1006 static const struct snd_pcm_ops snd_es1938_capture_ops = {
1007 	.open =		snd_es1938_capture_open,
1008 	.close =	snd_es1938_capture_close,
1009 	.ioctl =	snd_pcm_lib_ioctl,
1010 	.hw_params =	snd_es1938_pcm_hw_params,
1011 	.hw_free =	snd_es1938_pcm_hw_free,
1012 	.prepare =	snd_es1938_capture_prepare,
1013 	.trigger =	snd_es1938_capture_trigger,
1014 	.pointer =	snd_es1938_capture_pointer,
1015 	.copy =		snd_es1938_capture_copy,
1016 };
1017 
1018 static int snd_es1938_new_pcm(struct es1938 *chip, int device)
1019 {
1020 	struct snd_pcm *pcm;
1021 	int err;
1022 
1023 	if ((err = snd_pcm_new(chip->card, "es-1938-1946", device, 2, 1, &pcm)) < 0)
1024 		return err;
1025 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_es1938_playback_ops);
1026 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_es1938_capture_ops);
1027 
1028 	pcm->private_data = chip;
1029 	pcm->info_flags = 0;
1030 	strcpy(pcm->name, "ESS Solo-1");
1031 
1032 	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1033 					      snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
1034 
1035 	chip->pcm = pcm;
1036 	return 0;
1037 }
1038 
1039 /* -------------------------------------------------------------------
1040  *
1041  *                       *** Mixer part ***
1042  */
1043 
1044 static int snd_es1938_info_mux(struct snd_kcontrol *kcontrol,
1045 			       struct snd_ctl_elem_info *uinfo)
1046 {
1047 	static const char * const texts[8] = {
1048 		"Mic", "Mic Master", "CD", "AOUT",
1049 		"Mic1", "Mix", "Line", "Master"
1050 	};
1051 
1052 	return snd_ctl_enum_info(uinfo, 1, 8, texts);
1053 }
1054 
1055 static int snd_es1938_get_mux(struct snd_kcontrol *kcontrol,
1056 			      struct snd_ctl_elem_value *ucontrol)
1057 {
1058 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1059 	ucontrol->value.enumerated.item[0] = snd_es1938_mixer_read(chip, 0x1c) & 0x07;
1060 	return 0;
1061 }
1062 
1063 static int snd_es1938_put_mux(struct snd_kcontrol *kcontrol,
1064 			      struct snd_ctl_elem_value *ucontrol)
1065 {
1066 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1067 	unsigned char val = ucontrol->value.enumerated.item[0];
1068 
1069 	if (val > 7)
1070 		return -EINVAL;
1071 	return snd_es1938_mixer_bits(chip, 0x1c, 0x07, val) != val;
1072 }
1073 
1074 #define snd_es1938_info_spatializer_enable	snd_ctl_boolean_mono_info
1075 
1076 static int snd_es1938_get_spatializer_enable(struct snd_kcontrol *kcontrol,
1077 					     struct snd_ctl_elem_value *ucontrol)
1078 {
1079 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1080 	unsigned char val = snd_es1938_mixer_read(chip, 0x50);
1081 	ucontrol->value.integer.value[0] = !!(val & 8);
1082 	return 0;
1083 }
1084 
1085 static int snd_es1938_put_spatializer_enable(struct snd_kcontrol *kcontrol,
1086 					     struct snd_ctl_elem_value *ucontrol)
1087 {
1088 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1089 	unsigned char oval, nval;
1090 	int change;
1091 	nval = ucontrol->value.integer.value[0] ? 0x0c : 0x04;
1092 	oval = snd_es1938_mixer_read(chip, 0x50) & 0x0c;
1093 	change = nval != oval;
1094 	if (change) {
1095 		snd_es1938_mixer_write(chip, 0x50, nval & ~0x04);
1096 		snd_es1938_mixer_write(chip, 0x50, nval);
1097 	}
1098 	return change;
1099 }
1100 
1101 static int snd_es1938_info_hw_volume(struct snd_kcontrol *kcontrol,
1102 				     struct snd_ctl_elem_info *uinfo)
1103 {
1104 	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
1105 	uinfo->count = 2;
1106 	uinfo->value.integer.min = 0;
1107 	uinfo->value.integer.max = 63;
1108 	return 0;
1109 }
1110 
1111 static int snd_es1938_get_hw_volume(struct snd_kcontrol *kcontrol,
1112 				    struct snd_ctl_elem_value *ucontrol)
1113 {
1114 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1115 	ucontrol->value.integer.value[0] = snd_es1938_mixer_read(chip, 0x61) & 0x3f;
1116 	ucontrol->value.integer.value[1] = snd_es1938_mixer_read(chip, 0x63) & 0x3f;
1117 	return 0;
1118 }
1119 
1120 #define snd_es1938_info_hw_switch		snd_ctl_boolean_stereo_info
1121 
1122 static int snd_es1938_get_hw_switch(struct snd_kcontrol *kcontrol,
1123 				    struct snd_ctl_elem_value *ucontrol)
1124 {
1125 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1126 	ucontrol->value.integer.value[0] = !(snd_es1938_mixer_read(chip, 0x61) & 0x40);
1127 	ucontrol->value.integer.value[1] = !(snd_es1938_mixer_read(chip, 0x63) & 0x40);
1128 	return 0;
1129 }
1130 
1131 static void snd_es1938_hwv_free(struct snd_kcontrol *kcontrol)
1132 {
1133 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1134 	chip->master_volume = NULL;
1135 	chip->master_switch = NULL;
1136 	chip->hw_volume = NULL;
1137 	chip->hw_switch = NULL;
1138 }
1139 
1140 static int snd_es1938_reg_bits(struct es1938 *chip, unsigned char reg,
1141 			       unsigned char mask, unsigned char val)
1142 {
1143 	if (reg < 0xa0)
1144 		return snd_es1938_mixer_bits(chip, reg, mask, val);
1145 	else
1146 		return snd_es1938_bits(chip, reg, mask, val);
1147 }
1148 
1149 static int snd_es1938_reg_read(struct es1938 *chip, unsigned char reg)
1150 {
1151 	if (reg < 0xa0)
1152 		return snd_es1938_mixer_read(chip, reg);
1153 	else
1154 		return snd_es1938_read(chip, reg);
1155 }
1156 
1157 #define ES1938_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
1158 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
1159   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,\
1160   .name = xname, .index = xindex, \
1161   .info = snd_es1938_info_single, \
1162   .get = snd_es1938_get_single, .put = snd_es1938_put_single, \
1163   .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24), \
1164   .tlv = { .p = xtlv } }
1165 #define ES1938_SINGLE(xname, xindex, reg, shift, mask, invert) \
1166 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1167   .info = snd_es1938_info_single, \
1168   .get = snd_es1938_get_single, .put = snd_es1938_put_single, \
1169   .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }
1170 
1171 static int snd_es1938_info_single(struct snd_kcontrol *kcontrol,
1172 				  struct snd_ctl_elem_info *uinfo)
1173 {
1174 	int mask = (kcontrol->private_value >> 16) & 0xff;
1175 
1176 	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1177 	uinfo->count = 1;
1178 	uinfo->value.integer.min = 0;
1179 	uinfo->value.integer.max = mask;
1180 	return 0;
1181 }
1182 
1183 static int snd_es1938_get_single(struct snd_kcontrol *kcontrol,
1184 				 struct snd_ctl_elem_value *ucontrol)
1185 {
1186 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1187 	int reg = kcontrol->private_value & 0xff;
1188 	int shift = (kcontrol->private_value >> 8) & 0xff;
1189 	int mask = (kcontrol->private_value >> 16) & 0xff;
1190 	int invert = (kcontrol->private_value >> 24) & 0xff;
1191 	int val;
1192 
1193 	val = snd_es1938_reg_read(chip, reg);
1194 	ucontrol->value.integer.value[0] = (val >> shift) & mask;
1195 	if (invert)
1196 		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
1197 	return 0;
1198 }
1199 
1200 static int snd_es1938_put_single(struct snd_kcontrol *kcontrol,
1201 				 struct snd_ctl_elem_value *ucontrol)
1202 {
1203 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1204 	int reg = kcontrol->private_value & 0xff;
1205 	int shift = (kcontrol->private_value >> 8) & 0xff;
1206 	int mask = (kcontrol->private_value >> 16) & 0xff;
1207 	int invert = (kcontrol->private_value >> 24) & 0xff;
1208 	unsigned char val;
1209 
1210 	val = (ucontrol->value.integer.value[0] & mask);
1211 	if (invert)
1212 		val = mask - val;
1213 	mask <<= shift;
1214 	val <<= shift;
1215 	return snd_es1938_reg_bits(chip, reg, mask, val) != val;
1216 }
1217 
1218 #define ES1938_DOUBLE_TLV(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert, xtlv) \
1219 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
1220   .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,\
1221   .name = xname, .index = xindex, \
1222   .info = snd_es1938_info_double, \
1223   .get = snd_es1938_get_double, .put = snd_es1938_put_double, \
1224   .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22), \
1225   .tlv = { .p = xtlv } }
1226 #define ES1938_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
1227 { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
1228   .info = snd_es1938_info_double, \
1229   .get = snd_es1938_get_double, .put = snd_es1938_put_double, \
1230   .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }
1231 
1232 static int snd_es1938_info_double(struct snd_kcontrol *kcontrol,
1233 				  struct snd_ctl_elem_info *uinfo)
1234 {
1235 	int mask = (kcontrol->private_value >> 24) & 0xff;
1236 
1237 	uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
1238 	uinfo->count = 2;
1239 	uinfo->value.integer.min = 0;
1240 	uinfo->value.integer.max = mask;
1241 	return 0;
1242 }
1243 
1244 static int snd_es1938_get_double(struct snd_kcontrol *kcontrol,
1245 				 struct snd_ctl_elem_value *ucontrol)
1246 {
1247 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1248 	int left_reg = kcontrol->private_value & 0xff;
1249 	int right_reg = (kcontrol->private_value >> 8) & 0xff;
1250 	int shift_left = (kcontrol->private_value >> 16) & 0x07;
1251 	int shift_right = (kcontrol->private_value >> 19) & 0x07;
1252 	int mask = (kcontrol->private_value >> 24) & 0xff;
1253 	int invert = (kcontrol->private_value >> 22) & 1;
1254 	unsigned char left, right;
1255 
1256 	left = snd_es1938_reg_read(chip, left_reg);
1257 	if (left_reg != right_reg)
1258 		right = snd_es1938_reg_read(chip, right_reg);
1259 	else
1260 		right = left;
1261 	ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
1262 	ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
1263 	if (invert) {
1264 		ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
1265 		ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
1266 	}
1267 	return 0;
1268 }
1269 
1270 static int snd_es1938_put_double(struct snd_kcontrol *kcontrol,
1271 				 struct snd_ctl_elem_value *ucontrol)
1272 {
1273 	struct es1938 *chip = snd_kcontrol_chip(kcontrol);
1274 	int left_reg = kcontrol->private_value & 0xff;
1275 	int right_reg = (kcontrol->private_value >> 8) & 0xff;
1276 	int shift_left = (kcontrol->private_value >> 16) & 0x07;
1277 	int shift_right = (kcontrol->private_value >> 19) & 0x07;
1278 	int mask = (kcontrol->private_value >> 24) & 0xff;
1279 	int invert = (kcontrol->private_value >> 22) & 1;
1280 	int change;
1281 	unsigned char val1, val2, mask1, mask2;
1282 
1283 	val1 = ucontrol->value.integer.value[0] & mask;
1284 	val2 = ucontrol->value.integer.value[1] & mask;
1285 	if (invert) {
1286 		val1 = mask - val1;
1287 		val2 = mask - val2;
1288 	}
1289 	val1 <<= shift_left;
1290 	val2 <<= shift_right;
1291 	mask1 = mask << shift_left;
1292 	mask2 = mask << shift_right;
1293 	if (left_reg != right_reg) {
1294 		change = 0;
1295 		if (snd_es1938_reg_bits(chip, left_reg, mask1, val1) != val1)
1296 			change = 1;
1297 		if (snd_es1938_reg_bits(chip, right_reg, mask2, val2) != val2)
1298 			change = 1;
1299 	} else {
1300 		change = (snd_es1938_reg_bits(chip, left_reg, mask1 | mask2,
1301 					      val1 | val2) != (val1 | val2));
1302 	}
1303 	return change;
1304 }
1305 
1306 static const DECLARE_TLV_DB_RANGE(db_scale_master,
1307 	0, 54, TLV_DB_SCALE_ITEM(-3600, 50, 1),
1308 	54, 63, TLV_DB_SCALE_ITEM(-900, 100, 0),
1309 );
1310 
1311 static const DECLARE_TLV_DB_RANGE(db_scale_audio1,
1312 	0, 8, TLV_DB_SCALE_ITEM(-3300, 300, 1),
1313 	8, 15, TLV_DB_SCALE_ITEM(-900, 150, 0),
1314 );
1315 
1316 static const DECLARE_TLV_DB_RANGE(db_scale_audio2,
1317 	0, 8, TLV_DB_SCALE_ITEM(-3450, 300, 1),
1318 	8, 15, TLV_DB_SCALE_ITEM(-1050, 150, 0),
1319 );
1320 
1321 static const DECLARE_TLV_DB_RANGE(db_scale_mic,
1322 	0, 8, TLV_DB_SCALE_ITEM(-2400, 300, 1),
1323 	8, 15, TLV_DB_SCALE_ITEM(0, 150, 0),
1324 );
1325 
1326 static const DECLARE_TLV_DB_RANGE(db_scale_line,
1327 	0, 8, TLV_DB_SCALE_ITEM(-3150, 300, 1),
1328 	8, 15, TLV_DB_SCALE_ITEM(-750, 150, 0),
1329 );
1330 
1331 static const DECLARE_TLV_DB_SCALE(db_scale_capture, 0, 150, 0);
1332 
1333 static struct snd_kcontrol_new snd_es1938_controls[] = {
1334 ES1938_DOUBLE_TLV("Master Playback Volume", 0, 0x60, 0x62, 0, 0, 63, 0,
1335 		  db_scale_master),
1336 ES1938_DOUBLE("Master Playback Switch", 0, 0x60, 0x62, 6, 6, 1, 1),
1337 {
1338 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1339 	.name = "Hardware Master Playback Volume",
1340 	.access = SNDRV_CTL_ELEM_ACCESS_READ,
1341 	.info = snd_es1938_info_hw_volume,
1342 	.get = snd_es1938_get_hw_volume,
1343 },
1344 {
1345 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1346 	.access = (SNDRV_CTL_ELEM_ACCESS_READ |
1347 		   SNDRV_CTL_ELEM_ACCESS_TLV_READ),
1348 	.name = "Hardware Master Playback Switch",
1349 	.info = snd_es1938_info_hw_switch,
1350 	.get = snd_es1938_get_hw_switch,
1351 	.tlv = { .p = db_scale_master },
1352 },
1353 ES1938_SINGLE("Hardware Volume Split", 0, 0x64, 7, 1, 0),
1354 ES1938_DOUBLE_TLV("Line Playback Volume", 0, 0x3e, 0x3e, 4, 0, 15, 0,
1355 		  db_scale_line),
1356 ES1938_DOUBLE("CD Playback Volume", 0, 0x38, 0x38, 4, 0, 15, 0),
1357 ES1938_DOUBLE_TLV("FM Playback Volume", 0, 0x36, 0x36, 4, 0, 15, 0,
1358 		  db_scale_mic),
1359 ES1938_DOUBLE_TLV("Mono Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0,
1360 		  db_scale_line),
1361 ES1938_DOUBLE_TLV("Mic Playback Volume", 0, 0x1a, 0x1a, 4, 0, 15, 0,
1362 		  db_scale_mic),
1363 ES1938_DOUBLE_TLV("Aux Playback Volume", 0, 0x3a, 0x3a, 4, 0, 15, 0,
1364 		  db_scale_line),
1365 ES1938_DOUBLE_TLV("Capture Volume", 0, 0xb4, 0xb4, 4, 0, 15, 0,
1366 		  db_scale_capture),
1367 ES1938_SINGLE("Beep Volume", 0, 0x3c, 0, 7, 0),
1368 ES1938_SINGLE("Record Monitor", 0, 0xa8, 3, 1, 0),
1369 ES1938_SINGLE("Capture Switch", 0, 0x1c, 4, 1, 1),
1370 {
1371 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1372 	.name = "Capture Source",
1373 	.info = snd_es1938_info_mux,
1374 	.get = snd_es1938_get_mux,
1375 	.put = snd_es1938_put_mux,
1376 },
1377 ES1938_DOUBLE_TLV("Mono Input Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0,
1378 		  db_scale_line),
1379 ES1938_DOUBLE_TLV("PCM Capture Volume", 0, 0x69, 0x69, 4, 0, 15, 0,
1380 		  db_scale_audio2),
1381 ES1938_DOUBLE_TLV("Mic Capture Volume", 0, 0x68, 0x68, 4, 0, 15, 0,
1382 		  db_scale_mic),
1383 ES1938_DOUBLE_TLV("Line Capture Volume", 0, 0x6e, 0x6e, 4, 0, 15, 0,
1384 		  db_scale_line),
1385 ES1938_DOUBLE_TLV("FM Capture Volume", 0, 0x6b, 0x6b, 4, 0, 15, 0,
1386 		  db_scale_mic),
1387 ES1938_DOUBLE_TLV("Mono Capture Volume", 0, 0x6f, 0x6f, 4, 0, 15, 0,
1388 		  db_scale_line),
1389 ES1938_DOUBLE_TLV("CD Capture Volume", 0, 0x6a, 0x6a, 4, 0, 15, 0,
1390 		  db_scale_line),
1391 ES1938_DOUBLE_TLV("Aux Capture Volume", 0, 0x6c, 0x6c, 4, 0, 15, 0,
1392 		  db_scale_line),
1393 ES1938_DOUBLE_TLV("PCM Playback Volume", 0, 0x7c, 0x7c, 4, 0, 15, 0,
1394 		  db_scale_audio2),
1395 ES1938_DOUBLE_TLV("PCM Playback Volume", 1, 0x14, 0x14, 4, 0, 15, 0,
1396 		  db_scale_audio1),
1397 ES1938_SINGLE("3D Control - Level", 0, 0x52, 0, 63, 0),
1398 {
1399 	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1400 	.name = "3D Control - Switch",
1401 	.info = snd_es1938_info_spatializer_enable,
1402 	.get = snd_es1938_get_spatializer_enable,
1403 	.put = snd_es1938_put_spatializer_enable,
1404 },
1405 ES1938_SINGLE("Mic Boost (+26dB)", 0, 0x7d, 3, 1, 0)
1406 };
1407 
1408 
1409 /* ---------------------------------------------------------------------------- */
1410 /* ---------------------------------------------------------------------------- */
1411 
1412 /*
1413  * initialize the chip - used by resume callback, too
1414  */
1415 static void snd_es1938_chip_init(struct es1938 *chip)
1416 {
1417 	/* reset chip */
1418 	snd_es1938_reset(chip);
1419 
1420 	/* configure native mode */
1421 
1422 	/* enable bus master */
1423 	pci_set_master(chip->pci);
1424 
1425 	/* disable legacy audio */
1426 	pci_write_config_word(chip->pci, SL_PCI_LEGACYCONTROL, 0x805f);
1427 
1428 	/* set DDMA base */
1429 	pci_write_config_word(chip->pci, SL_PCI_DDMACONTROL, chip->ddma_port | 1);
1430 
1431 	/* set DMA/IRQ policy */
1432 	pci_write_config_dword(chip->pci, SL_PCI_CONFIG, 0);
1433 
1434 	/* enable Audio 1, Audio 2, MPU401 IRQ and HW volume IRQ*/
1435 	outb(0xf0, SLIO_REG(chip, IRQCONTROL));
1436 
1437 	/* reset DMA */
1438 	outb(0, SLDM_REG(chip, DMACLEAR));
1439 }
1440 
1441 #ifdef CONFIG_PM_SLEEP
1442 /*
1443  * PM support
1444  */
1445 
1446 static unsigned char saved_regs[SAVED_REG_SIZE+1] = {
1447 	0x14, 0x1a, 0x1c, 0x3a, 0x3c, 0x3e, 0x36, 0x38,
1448 	0x50, 0x52, 0x60, 0x61, 0x62, 0x63, 0x64, 0x68,
1449 	0x69, 0x6a, 0x6b, 0x6d, 0x6e, 0x6f, 0x7c, 0x7d,
1450 	0xa8, 0xb4,
1451 };
1452 
1453 
1454 static int es1938_suspend(struct device *dev)
1455 {
1456 	struct snd_card *card = dev_get_drvdata(dev);
1457 	struct es1938 *chip = card->private_data;
1458 	unsigned char *s, *d;
1459 
1460 	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1461 	snd_pcm_suspend_all(chip->pcm);
1462 
1463 	/* save mixer-related registers */
1464 	for (s = saved_regs, d = chip->saved_regs; *s; s++, d++)
1465 		*d = snd_es1938_reg_read(chip, *s);
1466 
1467 	outb(0x00, SLIO_REG(chip, IRQCONTROL)); /* disable irqs */
1468 	if (chip->irq >= 0) {
1469 		free_irq(chip->irq, chip);
1470 		chip->irq = -1;
1471 	}
1472 	return 0;
1473 }
1474 
1475 static int es1938_resume(struct device *dev)
1476 {
1477 	struct pci_dev *pci = to_pci_dev(dev);
1478 	struct snd_card *card = dev_get_drvdata(dev);
1479 	struct es1938 *chip = card->private_data;
1480 	unsigned char *s, *d;
1481 
1482 	if (request_irq(pci->irq, snd_es1938_interrupt,
1483 			IRQF_SHARED, KBUILD_MODNAME, chip)) {
1484 		dev_err(dev, "unable to grab IRQ %d, disabling device\n",
1485 			pci->irq);
1486 		snd_card_disconnect(card);
1487 		return -EIO;
1488 	}
1489 	chip->irq = pci->irq;
1490 	snd_es1938_chip_init(chip);
1491 
1492 	/* restore mixer-related registers */
1493 	for (s = saved_regs, d = chip->saved_regs; *s; s++, d++) {
1494 		if (*s < 0xa0)
1495 			snd_es1938_mixer_write(chip, *s, *d);
1496 		else
1497 			snd_es1938_write(chip, *s, *d);
1498 	}
1499 
1500 	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1501 	return 0;
1502 }
1503 
1504 static SIMPLE_DEV_PM_OPS(es1938_pm, es1938_suspend, es1938_resume);
1505 #define ES1938_PM_OPS	&es1938_pm
1506 #else
1507 #define ES1938_PM_OPS	NULL
1508 #endif /* CONFIG_PM_SLEEP */
1509 
1510 #ifdef SUPPORT_JOYSTICK
1511 static int snd_es1938_create_gameport(struct es1938 *chip)
1512 {
1513 	struct gameport *gp;
1514 
1515 	chip->gameport = gp = gameport_allocate_port();
1516 	if (!gp) {
1517 		dev_err(chip->card->dev,
1518 			"cannot allocate memory for gameport\n");
1519 		return -ENOMEM;
1520 	}
1521 
1522 	gameport_set_name(gp, "ES1938");
1523 	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
1524 	gameport_set_dev_parent(gp, &chip->pci->dev);
1525 	gp->io = chip->game_port;
1526 
1527 	gameport_register_port(gp);
1528 
1529 	return 0;
1530 }
1531 
1532 static void snd_es1938_free_gameport(struct es1938 *chip)
1533 {
1534 	if (chip->gameport) {
1535 		gameport_unregister_port(chip->gameport);
1536 		chip->gameport = NULL;
1537 	}
1538 }
1539 #else
1540 static inline int snd_es1938_create_gameport(struct es1938 *chip) { return -ENOSYS; }
1541 static inline void snd_es1938_free_gameport(struct es1938 *chip) { }
1542 #endif /* SUPPORT_JOYSTICK */
1543 
1544 static int snd_es1938_free(struct es1938 *chip)
1545 {
1546 	/* disable irqs */
1547 	outb(0x00, SLIO_REG(chip, IRQCONTROL));
1548 	if (chip->rmidi)
1549 		snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0);
1550 
1551 	snd_es1938_free_gameport(chip);
1552 
1553 	if (chip->irq >= 0)
1554 		free_irq(chip->irq, chip);
1555 	pci_release_regions(chip->pci);
1556 	pci_disable_device(chip->pci);
1557 	kfree(chip);
1558 	return 0;
1559 }
1560 
1561 static int snd_es1938_dev_free(struct snd_device *device)
1562 {
1563 	struct es1938 *chip = device->device_data;
1564 	return snd_es1938_free(chip);
1565 }
1566 
1567 static int snd_es1938_create(struct snd_card *card,
1568 			     struct pci_dev *pci,
1569 			     struct es1938 **rchip)
1570 {
1571 	struct es1938 *chip;
1572 	int err;
1573 	static struct snd_device_ops ops = {
1574 		.dev_free =	snd_es1938_dev_free,
1575 	};
1576 
1577 	*rchip = NULL;
1578 
1579 	/* enable PCI device */
1580 	if ((err = pci_enable_device(pci)) < 0)
1581 		return err;
1582         /* check, if we can restrict PCI DMA transfers to 24 bits */
1583 	if (dma_set_mask(&pci->dev, DMA_BIT_MASK(24)) < 0 ||
1584 	    dma_set_coherent_mask(&pci->dev, DMA_BIT_MASK(24)) < 0) {
1585 		dev_err(card->dev,
1586 			"architecture does not support 24bit PCI busmaster DMA\n");
1587 		pci_disable_device(pci);
1588                 return -ENXIO;
1589         }
1590 
1591 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1592 	if (chip == NULL) {
1593 		pci_disable_device(pci);
1594 		return -ENOMEM;
1595 	}
1596 	spin_lock_init(&chip->reg_lock);
1597 	spin_lock_init(&chip->mixer_lock);
1598 	chip->card = card;
1599 	chip->pci = pci;
1600 	chip->irq = -1;
1601 	if ((err = pci_request_regions(pci, "ESS Solo-1")) < 0) {
1602 		kfree(chip);
1603 		pci_disable_device(pci);
1604 		return err;
1605 	}
1606 	chip->io_port = pci_resource_start(pci, 0);
1607 	chip->sb_port = pci_resource_start(pci, 1);
1608 	chip->vc_port = pci_resource_start(pci, 2);
1609 	chip->mpu_port = pci_resource_start(pci, 3);
1610 	chip->game_port = pci_resource_start(pci, 4);
1611 	if (request_irq(pci->irq, snd_es1938_interrupt, IRQF_SHARED,
1612 			KBUILD_MODNAME, chip)) {
1613 		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1614 		snd_es1938_free(chip);
1615 		return -EBUSY;
1616 	}
1617 	chip->irq = pci->irq;
1618 	dev_dbg(card->dev,
1619 		"create: io: 0x%lx, sb: 0x%lx, vc: 0x%lx, mpu: 0x%lx, game: 0x%lx\n",
1620 		   chip->io_port, chip->sb_port, chip->vc_port, chip->mpu_port, chip->game_port);
1621 
1622 	chip->ddma_port = chip->vc_port + 0x00;		/* fix from Thomas Sailer */
1623 
1624 	snd_es1938_chip_init(chip);
1625 
1626 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1627 		snd_es1938_free(chip);
1628 		return err;
1629 	}
1630 
1631 	*rchip = chip;
1632 	return 0;
1633 }
1634 
1635 /* --------------------------------------------------------------------
1636  * Interrupt handler
1637  * -------------------------------------------------------------------- */
1638 static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id)
1639 {
1640 	struct es1938 *chip = dev_id;
1641 	unsigned char status, audiostatus;
1642 	int handled = 0;
1643 
1644 	status = inb(SLIO_REG(chip, IRQCONTROL));
1645 #if 0
1646 	dev_dbg(chip->card->dev,
1647 		"Es1938debug - interrupt status: =0x%x\n", status);
1648 #endif
1649 
1650 	/* AUDIO 1 */
1651 	if (status & 0x10) {
1652 #if 0
1653 		dev_dbg(chip->card->dev,
1654 		       "Es1938debug - AUDIO channel 1 interrupt\n");
1655 		dev_dbg(chip->card->dev,
1656 		       "Es1938debug - AUDIO channel 1 DMAC DMA count: %u\n",
1657 		       inw(SLDM_REG(chip, DMACOUNT)));
1658 		dev_dbg(chip->card->dev,
1659 		       "Es1938debug - AUDIO channel 1 DMAC DMA base: %u\n",
1660 		       inl(SLDM_REG(chip, DMAADDR)));
1661 		dev_dbg(chip->card->dev,
1662 		       "Es1938debug - AUDIO channel 1 DMAC DMA status: 0x%x\n",
1663 		       inl(SLDM_REG(chip, DMASTATUS)));
1664 #endif
1665 		/* clear irq */
1666 		handled = 1;
1667 		audiostatus = inb(SLSB_REG(chip, STATUS));
1668 		if (chip->active & ADC1)
1669 			snd_pcm_period_elapsed(chip->capture_substream);
1670 		else if (chip->active & DAC1)
1671 			snd_pcm_period_elapsed(chip->playback2_substream);
1672 	}
1673 
1674 	/* AUDIO 2 */
1675 	if (status & 0x20) {
1676 #if 0
1677 		dev_dbg(chip->card->dev,
1678 		       "Es1938debug - AUDIO channel 2 interrupt\n");
1679 		dev_dbg(chip->card->dev,
1680 		       "Es1938debug - AUDIO channel 2 DMAC DMA count: %u\n",
1681 		       inw(SLIO_REG(chip, AUDIO2DMACOUNT)));
1682 		dev_dbg(chip->card->dev,
1683 		       "Es1938debug - AUDIO channel 2 DMAC DMA base: %u\n",
1684 		       inl(SLIO_REG(chip, AUDIO2DMAADDR)));
1685 
1686 #endif
1687 		/* clear irq */
1688 		handled = 1;
1689 		snd_es1938_mixer_bits(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x80, 0);
1690 		if (chip->active & DAC2)
1691 			snd_pcm_period_elapsed(chip->playback1_substream);
1692 	}
1693 
1694 	/* Hardware volume */
1695 	if (status & 0x40) {
1696 		int split = snd_es1938_mixer_read(chip, 0x64) & 0x80;
1697 		handled = 1;
1698 		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_switch->id);
1699 		snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_volume->id);
1700 		if (!split) {
1701 			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1702 				       &chip->master_switch->id);
1703 			snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
1704 				       &chip->master_volume->id);
1705 		}
1706 		/* ack interrupt */
1707 		snd_es1938_mixer_write(chip, 0x66, 0x00);
1708 	}
1709 
1710 	/* MPU401 */
1711 	if (status & 0x80) {
1712 		// the following line is evil! It switches off MIDI interrupt handling after the first interrupt received.
1713 		// replacing the last 0 by 0x40 works for ESS-Solo1, but just doing nothing works as well!
1714 		// andreas@flying-snail.de
1715 		// snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0); /* ack? */
1716 		if (chip->rmidi) {
1717 			handled = 1;
1718 			snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
1719 		}
1720 	}
1721 	return IRQ_RETVAL(handled);
1722 }
1723 
1724 #define ES1938_DMA_SIZE 64
1725 
1726 static int snd_es1938_mixer(struct es1938 *chip)
1727 {
1728 	struct snd_card *card;
1729 	unsigned int idx;
1730 	int err;
1731 
1732 	card = chip->card;
1733 
1734 	strcpy(card->mixername, "ESS Solo-1");
1735 
1736 	for (idx = 0; idx < ARRAY_SIZE(snd_es1938_controls); idx++) {
1737 		struct snd_kcontrol *kctl;
1738 		kctl = snd_ctl_new1(&snd_es1938_controls[idx], chip);
1739 		switch (idx) {
1740 			case 0:
1741 				chip->master_volume = kctl;
1742 				kctl->private_free = snd_es1938_hwv_free;
1743 				break;
1744 			case 1:
1745 				chip->master_switch = kctl;
1746 				kctl->private_free = snd_es1938_hwv_free;
1747 				break;
1748 			case 2:
1749 				chip->hw_volume = kctl;
1750 				kctl->private_free = snd_es1938_hwv_free;
1751 				break;
1752 			case 3:
1753 				chip->hw_switch = kctl;
1754 				kctl->private_free = snd_es1938_hwv_free;
1755 				break;
1756 			}
1757 		if ((err = snd_ctl_add(card, kctl)) < 0)
1758 			return err;
1759 	}
1760 	return 0;
1761 }
1762 
1763 
1764 static int snd_es1938_probe(struct pci_dev *pci,
1765 			    const struct pci_device_id *pci_id)
1766 {
1767 	static int dev;
1768 	struct snd_card *card;
1769 	struct es1938 *chip;
1770 	struct snd_opl3 *opl3;
1771 	int idx, err;
1772 
1773 	if (dev >= SNDRV_CARDS)
1774 		return -ENODEV;
1775 	if (!enable[dev]) {
1776 		dev++;
1777 		return -ENOENT;
1778 	}
1779 
1780 	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
1781 			   0, &card);
1782 	if (err < 0)
1783 		return err;
1784 	for (idx = 0; idx < 5; idx++) {
1785 		if (pci_resource_start(pci, idx) == 0 ||
1786 		    !(pci_resource_flags(pci, idx) & IORESOURCE_IO)) {
1787 		    	snd_card_free(card);
1788 		    	return -ENODEV;
1789 		}
1790 	}
1791 	if ((err = snd_es1938_create(card, pci, &chip)) < 0) {
1792 		snd_card_free(card);
1793 		return err;
1794 	}
1795 	card->private_data = chip;
1796 
1797 	strcpy(card->driver, "ES1938");
1798 	strcpy(card->shortname, "ESS ES1938 (Solo-1)");
1799 	sprintf(card->longname, "%s rev %i, irq %i",
1800 		card->shortname,
1801 		chip->revision,
1802 		chip->irq);
1803 
1804 	if ((err = snd_es1938_new_pcm(chip, 0)) < 0) {
1805 		snd_card_free(card);
1806 		return err;
1807 	}
1808 	if ((err = snd_es1938_mixer(chip)) < 0) {
1809 		snd_card_free(card);
1810 		return err;
1811 	}
1812 	if (snd_opl3_create(card,
1813 			    SLSB_REG(chip, FMLOWADDR),
1814 			    SLSB_REG(chip, FMHIGHADDR),
1815 			    OPL3_HW_OPL3, 1, &opl3) < 0) {
1816 		dev_err(card->dev, "OPL3 not detected at 0x%lx\n",
1817 			   SLSB_REG(chip, FMLOWADDR));
1818 	} else {
1819 	        if ((err = snd_opl3_timer_new(opl3, 0, 1)) < 0) {
1820 	                snd_card_free(card);
1821 	                return err;
1822 		}
1823 	        if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
1824 	                snd_card_free(card);
1825 	                return err;
1826 		}
1827 	}
1828 	if (snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
1829 				chip->mpu_port,
1830 				MPU401_INFO_INTEGRATED | MPU401_INFO_IRQ_HOOK,
1831 				-1, &chip->rmidi) < 0) {
1832 		dev_err(card->dev, "unable to initialize MPU-401\n");
1833 	} else {
1834 		// this line is vital for MIDI interrupt handling on ess-solo1
1835 		// andreas@flying-snail.de
1836 		snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0x40);
1837 	}
1838 
1839 	snd_es1938_create_gameport(chip);
1840 
1841 	if ((err = snd_card_register(card)) < 0) {
1842 		snd_card_free(card);
1843 		return err;
1844 	}
1845 
1846 	pci_set_drvdata(pci, card);
1847 	dev++;
1848 	return 0;
1849 }
1850 
1851 static void snd_es1938_remove(struct pci_dev *pci)
1852 {
1853 	snd_card_free(pci_get_drvdata(pci));
1854 }
1855 
1856 static struct pci_driver es1938_driver = {
1857 	.name = KBUILD_MODNAME,
1858 	.id_table = snd_es1938_ids,
1859 	.probe = snd_es1938_probe,
1860 	.remove = snd_es1938_remove,
1861 	.driver = {
1862 		.pm = ES1938_PM_OPS,
1863 	},
1864 };
1865 
1866 module_pci_driver(es1938_driver);
1867