[linux.git] / sound / oss / pas2_pcm.c

/*
 * pas2_pcm.c Audio routines for PAS16
 *
 *
 * Copyright (C) by Hannu Savolainen 1993-1997
 *
 * OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
 * Version 2 (June 1991). See the "COPYING" file distributed with this software
 * for more info.
 *
 *
 * Thomas Sailer   : ioctl code reworked (vmalloc/vfree removed)
 * Alan Cox	   : Swatted a double allocation of device bug. Made a few
 *		     more things module options.
 * Bartlomiej Zolnierkiewicz : Added __init to pas_pcm_init()
 */

#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/timex.h>
#include "sound_config.h"

#include "pas2.h"

#ifndef DEB
#define DEB(WHAT)
#endif

#define PAS_PCM_INTRBITS (0x08)
/*
 * Sample buffer timer interrupt enable
 */

#define PCM_NON	0
#define PCM_DAC	1
#define PCM_ADC	2

static unsigned long pcm_speed; 	/* sampling rate */
static unsigned char pcm_channels = 1;	/* channels (1 or 2) */
static unsigned char pcm_bits = 8;	/* bits/sample (8 or 16) */
static unsigned char pcm_filter;	/* filter FLAG */
static unsigned char pcm_mode = PCM_NON;
static unsigned long pcm_count;
static unsigned short pcm_bitsok = 8;	/* mask of OK bits */
static int      pcm_busy;
int             pas_audiodev = -1;
static int      open_mode;

extern spinlock_t pas_lock;

static int pcm_set_speed(int arg)
{
	int foo, tmp;
	unsigned long flags;

	if (arg == 0)
		return pcm_speed;

	if (arg > 44100)
		arg = 44100;
	if (arg < 5000)
		arg = 5000;

	if (pcm_channels & 2)
	{
		foo = ((PIT_TICK_RATE / 2) + (arg / 2)) / arg;
		arg = ((PIT_TICK_RATE / 2) + (foo / 2)) / foo;
	}
	else
	{
		foo = (PIT_TICK_RATE + (arg / 2)) / arg;
		arg = (PIT_TICK_RATE + (foo / 2)) / foo;
	}

	pcm_speed = arg;

	tmp = pas_read(0x0B8A);

	/*
	 * Set anti-aliasing filters according to sample rate. You really *NEED*
	 * to enable this feature for all normal recording unless you want to
	 * experiment with aliasing effects.
	 * These filters apply to the selected "recording" source.
	 * I (pfw) don't know the encoding of these 5 bits. The values shown
	 * come from the SDK found on ftp.uwp.edu:/pub/msdos/proaudio/.
	 *
	 * I cleared bit 5 of these values, since that bit controls the master
	 * mute flag. (Olav Wölfelschneider)
	 *
	 */
#if !defined NO_AUTO_FILTER_SET
	tmp &= 0xe0;
	if (pcm_speed >= 2 * 17897)
		tmp |= 0x01;
	else if (pcm_speed >= 2 * 15909)
		tmp |= 0x02;
	else if (pcm_speed >= 2 * 11931)
		tmp |= 0x09;
	else if (pcm_speed >= 2 * 8948)
		tmp |= 0x11;
	else if (pcm_speed >= 2 * 5965)
		tmp |= 0x19;
	else if (pcm_speed >= 2 * 2982)
		tmp |= 0x04;
	pcm_filter = tmp;
#endif

	spin_lock_irqsave(&pas_lock, flags);

	pas_write(tmp & ~(0x40 | 0x80), 0x0B8A);
	pas_write(0x00 | 0x30 | 0x04, 0x138B);
	pas_write(foo & 0xff, 0x1388);
	pas_write((foo >> 8) & 0xff, 0x1388);
	pas_write(tmp, 0x0B8A);

	spin_unlock_irqrestore(&pas_lock, flags);

	return pcm_speed;
}

static int pcm_set_channels(int arg)
{

	if ((arg != 1) && (arg != 2))
		return pcm_channels;

	if (arg != pcm_channels)
	{
		pas_write(pas_read(0xF8A) ^ 0x20, 0xF8A);

		pcm_channels = arg;
		pcm_set_speed(pcm_speed);	/* The speed must be reinitialized */
	}
	return pcm_channels;
}

static int pcm_set_bits(int arg)
{
	if (arg == 0)
		return pcm_bits;

	if ((arg & pcm_bitsok) != arg)
		return pcm_bits;

	if (arg != pcm_bits)
	{
		pas_write(pas_read(0x8389) ^ 0x04, 0x8389);

		pcm_bits = arg;
	}
	return pcm_bits;
}

static int pas_audio_ioctl(int dev, unsigned int cmd, void __user *arg)
{
	int val, ret;
	int __user *p = arg;

	DEB(printk("pas2_pcm.c: static int pas_audio_ioctl(unsigned int cmd = %X, unsigned int arg = %X)\n", cmd, arg));

	switch (cmd) 
	{
	case SOUND_PCM_WRITE_RATE:
		if (get_user(val, p)) 
			return -EFAULT;
		ret = pcm_set_speed(val);
		break;

	case SOUND_PCM_READ_RATE:
		ret = pcm_speed;
		break;
		
	case SNDCTL_DSP_STEREO:
		if (get_user(val, p)) 
			return -EFAULT;
		ret = pcm_set_channels(val + 1) - 1;
		break;

	case SOUND_PCM_WRITE_CHANNELS:
		if (get_user(val, p)) 
			return -EFAULT;
		ret = pcm_set_channels(val);
		break;

	case SOUND_PCM_READ_CHANNELS:
		ret = pcm_channels;
		break;

	case SNDCTL_DSP_SETFMT:
		if (get_user(val, p))
			return -EFAULT;
		ret = pcm_set_bits(val);
		break;
		
	case SOUND_PCM_READ_BITS:
		ret = pcm_bits;
		break;
  
	default:
		return -EINVAL;
	}
	return put_user(ret, p);
}

static void pas_audio_reset(int dev)
{
	DEB(printk("pas2_pcm.c: static void pas_audio_reset(void)\n"));

	pas_write(pas_read(0xF8A) & ~0x40, 0xF8A);	/* Disable PCM */
}

static int pas_audio_open(int dev, int mode)
{
	int             err;
	unsigned long   flags;

	DEB(printk("pas2_pcm.c: static int pas_audio_open(int mode = %X)\n", mode));

	spin_lock_irqsave(&pas_lock, flags);
	if (pcm_busy)
	{
		spin_unlock_irqrestore(&pas_lock, flags);
		return -EBUSY;
	}
	pcm_busy = 1;
	spin_unlock_irqrestore(&pas_lock, flags);

	if ((err = pas_set_intr(PAS_PCM_INTRBITS)) < 0)
		return err;


	pcm_count = 0;
	open_mode = mode;

	return 0;
}

static void pas_audio_close(int dev)
{
	unsigned long   flags;

	DEB(printk("pas2_pcm.c: static void pas_audio_close(void)\n"));

	spin_lock_irqsave(&pas_lock, flags);

	pas_audio_reset(dev);
	pas_remove_intr(PAS_PCM_INTRBITS);
	pcm_mode = PCM_NON;

	pcm_busy = 0;
	spin_unlock_irqrestore(&pas_lock, flags);
}

static void pas_audio_output_block(int dev, unsigned long buf, int count,
		       int intrflag)
{
	unsigned long   flags, cnt;

	DEB(printk("pas2_pcm.c: static void pas_audio_output_block(char *buf = %P, int count = %X)\n", buf, count));

	cnt = count;
	if (audio_devs[dev]->dmap_out->dma > 3)
		cnt >>= 1;

	if (audio_devs[dev]->flags & DMA_AUTOMODE &&
	    intrflag &&
	    cnt == pcm_count)
		return;

	spin_lock_irqsave(&pas_lock, flags);

	pas_write(pas_read(0xF8A) & ~0x40,
		  0xF8A);

	/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */

	if (audio_devs[dev]->dmap_out->dma > 3)
		count >>= 1;

	if (count != pcm_count)
	{
		pas_write(pas_read(0x0B8A) & ~0x80, 0x0B8A);
		pas_write(0x40 | 0x30 | 0x04, 0x138B);
		pas_write(count & 0xff, 0x1389);
		pas_write((count >> 8) & 0xff, 0x1389);
		pas_write(pas_read(0x0B8A) | 0x80, 0x0B8A);

		pcm_count = count;
	}
	pas_write(pas_read(0x0B8A) | 0x80 | 0x40, 0x0B8A);
#ifdef NO_TRIGGER
	pas_write(pas_read(0xF8A) | 0x40 | 0x10, 0xF8A);
#endif

	pcm_mode = PCM_DAC;

	spin_unlock_irqrestore(&pas_lock, flags);
}

static void pas_audio_start_input(int dev, unsigned long buf, int count,
		      int intrflag)
{
	unsigned long   flags;
	int             cnt;

	DEB(printk("pas2_pcm.c: static void pas_audio_start_input(char *buf = %P, int count = %X)\n", buf, count));

	cnt = count;
	if (audio_devs[dev]->dmap_out->dma > 3)
		cnt >>= 1;

	if (audio_devs[pas_audiodev]->flags & DMA_AUTOMODE &&
	    intrflag &&
	    cnt == pcm_count)
		return;

	spin_lock_irqsave(&pas_lock, flags);

	/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */

	if (audio_devs[dev]->dmap_out->dma > 3)
		count >>= 1;

	if (count != pcm_count)
	{
		pas_write(pas_read(0x0B8A) & ~0x80, 0x0B8A);
		pas_write(0x40 | 0x30 | 0x04, 0x138B);
		pas_write(count & 0xff, 0x1389);
		pas_write((count >> 8) & 0xff, 0x1389);
		pas_write(pas_read(0x0B8A) | 0x80, 0x0B8A);

		pcm_count = count;
	}
	pas_write(pas_read(0x0B8A) | 0x80 | 0x40, 0x0B8A);
#ifdef NO_TRIGGER
	pas_write((pas_read(0xF8A) | 0x40) & ~0x10, 0xF8A);
#endif

	pcm_mode = PCM_ADC;

	spin_unlock_irqrestore(&pas_lock, flags);
}

#ifndef NO_TRIGGER
static void pas_audio_trigger(int dev, int state)
{
	unsigned long   flags;

	spin_lock_irqsave(&pas_lock, flags);
	state &= open_mode;

	if (state & PCM_ENABLE_OUTPUT)
		pas_write(pas_read(0xF8A) | 0x40 | 0x10, 0xF8A);
	else if (state & PCM_ENABLE_INPUT)
		pas_write((pas_read(0xF8A) | 0x40) & ~0x10, 0xF8A);
	else
		pas_write(pas_read(0xF8A) & ~0x40, 0xF8A);

	spin_unlock_irqrestore(&pas_lock, flags);
}
#endif

static int pas_audio_prepare_for_input(int dev, int bsize, int bcount)
{
	pas_audio_reset(dev);
	return 0;
}

static int pas_audio_prepare_for_output(int dev, int bsize, int bcount)
{
	pas_audio_reset(dev);
	return 0;
}

static struct audio_driver pas_audio_driver =
{
	.owner			= THIS_MODULE,
	.open			= pas_audio_open,
	.close			= pas_audio_close,
	.output_block		= pas_audio_output_block,
	.start_input		= pas_audio_start_input,
	.ioctl			= pas_audio_ioctl,
	.prepare_for_input	= pas_audio_prepare_for_input,
	.prepare_for_output	= pas_audio_prepare_for_output,
	.halt_io		= pas_audio_reset,
	.trigger		= pas_audio_trigger
};

void __init pas_pcm_init(struct address_info *hw_config)
{
	DEB(printk("pas2_pcm.c: long pas_pcm_init()\n"));

	pcm_bitsok = 8;
	if (pas_read(0xEF8B) & 0x08)
		pcm_bitsok |= 16;

	pcm_set_speed(DSP_DEFAULT_SPEED);

	if ((pas_audiodev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
					"Pro Audio Spectrum",
					&pas_audio_driver,
					sizeof(struct audio_driver),
					DMA_AUTOMODE,
					AFMT_U8 | AFMT_S16_LE,
					NULL,
					hw_config->dma,
					hw_config->dma)) < 0)
		printk(KERN_WARNING "PAS16: Too many PCM devices available\n");
}

void pas_pcm_interrupt(unsigned char status, int cause)
{
	if (cause == 1)
	{
		/*
		 * Halt the PCM first. Otherwise we don't have time to start a new
		 * block before the PCM chip proceeds to the next sample
		 */

		if (!(audio_devs[pas_audiodev]->flags & DMA_AUTOMODE))
			pas_write(pas_read(0xF8A) & ~0x40, 0xF8A);

		switch (pcm_mode)
		{
			case PCM_DAC:
				DMAbuf_outputintr(pas_audiodev, 1);
				break;

			case PCM_ADC:
				DMAbuf_inputintr(pas_audiodev);
				break;

			default:
				printk(KERN_WARNING "PAS: Unexpected PCM interrupt\n");
		}
	}
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* pas2_pcm.c Audio routines for PAS16
	3	*
	4	*
	5	* Copyright (C) by Hannu Savolainen 1993-1997
	6	*
	7	* OSS/Free for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
	8	* Version 2 (June 1991). See the "COPYING" file distributed with this software
	9	* for more info.
	10	*
	11	*
	12	* Thomas Sailer : ioctl code reworked (vmalloc/vfree removed)
	13	* Alan Cox : Swatted a double allocation of device bug. Made a few
	14	* more things module options.
	15	* Bartlomiej Zolnierkiewicz : Added __init to pas_pcm_init()
	16	*/
	17
	18	#include <linux/init.h>
	19	#include <linux/spinlock.h>
08604bd9	20	#include <linux/timex.h>
1da177e4 LT	21	#include "sound_config.h"
	22
	23	#include "pas2.h"
	24
	25	#ifndef DEB
	26	#define DEB(WHAT)
	27	#endif
	28
	29	#define PAS_PCM_INTRBITS (0x08)
	30	/*
	31	* Sample buffer timer interrupt enable
	32	*/
	33
	34	#define PCM_NON 0
	35	#define PCM_DAC 1
	36	#define PCM_ADC 2
	37
	38	static unsigned long pcm_speed; /* sampling rate */
	39	static unsigned char pcm_channels = 1; /* channels (1 or 2) */
	40	static unsigned char pcm_bits = 8; /* bits/sample (8 or 16) */
	41	static unsigned char pcm_filter; /* filter FLAG */
	42	static unsigned char pcm_mode = PCM_NON;
	43	static unsigned long pcm_count;
	44	static unsigned short pcm_bitsok = 8; /* mask of OK bits */
	45	static int pcm_busy;
	46	int pas_audiodev = -1;
	47	static int open_mode;
	48
	49	extern spinlock_t pas_lock;
	50
	51	static int pcm_set_speed(int arg)
	52	{
	53	int foo, tmp;
	54	unsigned long flags;
	55
	56	if (arg == 0)
	57	return pcm_speed;
	58
	59	if (arg > 44100)
	60	arg = 44100;
	61	if (arg < 5000)
	62	arg = 5000;
	63
	64	if (pcm_channels & 2)
	65	{
2921623f DS	66	foo = ((PIT_TICK_RATE / 2) + (arg / 2)) / arg;
2921623f DS	67	arg = ((PIT_TICK_RATE / 2) + (foo / 2)) / foo;
1da177e4 LT	68	}
	69	else
	70	{
2921623f DS	71	foo = (PIT_TICK_RATE + (arg / 2)) / arg;
2921623f DS	72	arg = (PIT_TICK_RATE + (foo / 2)) / foo;
1da177e4 LT	73	}
	74
	75	pcm_speed = arg;
	76
	77	tmp = pas_read(0x0B8A);
	78
	79	/*
	80	* Set anti-aliasing filters according to sample rate. You really NEED
	81	* to enable this feature for all normal recording unless you want to
	82	* experiment with aliasing effects.
	83	* These filters apply to the selected "recording" source.
	84	* I (pfw) don't know the encoding of these 5 bits. The values shown
	85	* come from the SDK found on ftp.uwp.edu:/pub/msdos/proaudio/.
	86	*
	87	* I cleared bit 5 of these values, since that bit controls the master
7bb2acb7	88	* mute flag. (Olav Wölfelschneider)
1da177e4 LT	89	*
	90	*/
	91	#if !defined NO_AUTO_FILTER_SET
	92	tmp &= 0xe0;
	93	if (pcm_speed >= 2 * 17897)
	94	tmp \|= 0x01;
	95	else if (pcm_speed >= 2 * 15909)
	96	tmp \|= 0x02;
	97	else if (pcm_speed >= 2 * 11931)
	98	tmp \|= 0x09;
	99	else if (pcm_speed >= 2 * 8948)
	100	tmp \|= 0x11;
	101	else if (pcm_speed >= 2 * 5965)
	102	tmp \|= 0x19;
	103	else if (pcm_speed >= 2 * 2982)
	104	tmp \|= 0x04;
	105	pcm_filter = tmp;
	106	#endif
	107
	108	spin_lock_irqsave(&pas_lock, flags);
	109
	110	pas_write(tmp & ~(0x40 \| 0x80), 0x0B8A);
	111	pas_write(0x00 \| 0x30 \| 0x04, 0x138B);
	112	pas_write(foo & 0xff, 0x1388);
	113	pas_write((foo >> 8) & 0xff, 0x1388);
	114	pas_write(tmp, 0x0B8A);
	115
	116	spin_unlock_irqrestore(&pas_lock, flags);
	117
	118	return pcm_speed;
	119	}
	120
	121	static int pcm_set_channels(int arg)
	122	{
	123
	124	if ((arg != 1) && (arg != 2))
	125	return pcm_channels;
	126
	127	if (arg != pcm_channels)
	128	{
	129	pas_write(pas_read(0xF8A) ^ 0x20, 0xF8A);
	130
	131	pcm_channels = arg;
	132	pcm_set_speed(pcm_speed); /* The speed must be reinitialized */
	133	}
	134	return pcm_channels;
	135	}
	136
	137	static int pcm_set_bits(int arg)
	138	{
	139	if (arg == 0)
	140	return pcm_bits;
	141
	142	if ((arg & pcm_bitsok) != arg)
	143	return pcm_bits;
	144
	145	if (arg != pcm_bits)
	146	{
	147	pas_write(pas_read(0x8389) ^ 0x04, 0x8389);
	148
	149	pcm_bits = arg;
	150	}
	151	return pcm_bits;
	152	}
153
154	static int pas_audio_ioctl(int dev, unsigned int cmd, void __user *arg)
155	{
156	int val, ret;
157	int __user *p = arg;
158
159	DEB(printk("pas2_pcm.c: static int pas_audio_ioctl(unsigned int cmd = %X, unsigned int arg = %X)\n", cmd, arg));
160
161	switch (cmd)
162	{
163	case SOUND_PCM_WRITE_RATE:
164	if (get_user(val, p))
165	return -EFAULT;
166	ret = pcm_set_speed(val);
167	break;
168
169	case SOUND_PCM_READ_RATE:
170	ret = pcm_speed;
171	break;
172
173	case SNDCTL_DSP_STEREO:
174	if (get_user(val, p))
175	return -EFAULT;
176	ret = pcm_set_channels(val + 1) - 1;
177	break;
178
179	case SOUND_PCM_WRITE_CHANNELS:
180	if (get_user(val, p))
181	return -EFAULT;
182	ret = pcm_set_channels(val);
183	break;
184
185	case SOUND_PCM_READ_CHANNELS:
186	ret = pcm_channels;
187	break;
188
189	case SNDCTL_DSP_SETFMT:
190	if (get_user(val, p))
191	return -EFAULT;
192	ret = pcm_set_bits(val);
193	break;
194
195	case SOUND_PCM_READ_BITS:
196	ret = pcm_bits;
197	break;
198
199	default:
200	return -EINVAL;
201	}
202	return put_user(ret, p);
203	}
204
205	static void pas_audio_reset(int dev)
206	{
207	DEB(printk("pas2_pcm.c: static void pas_audio_reset(void)\n"));
208
209	pas_write(pas_read(0xF8A) & ~0x40, 0xF8A); /* Disable PCM */
210	}
211
212	static int pas_audio_open(int dev, int mode)
213	{
214	int err;
215	unsigned long flags;
216
217	DEB(printk("pas2_pcm.c: static int pas_audio_open(int mode = %X)\n", mode));
218
219	spin_lock_irqsave(&pas_lock, flags);
220	if (pcm_busy)
221	{
222	spin_unlock_irqrestore(&pas_lock, flags);
223	return -EBUSY;
224	}
225	pcm_busy = 1;
226	spin_unlock_irqrestore(&pas_lock, flags);
227
228	if ((err = pas_set_intr(PAS_PCM_INTRBITS)) < 0)
229	return err;
230
231
232	pcm_count = 0;
233	open_mode = mode;
234
235	return 0;
236	}
237
238	static void pas_audio_close(int dev)
239	{
240	unsigned long flags;
241
242	DEB(printk("pas2_pcm.c: static void pas_audio_close(void)\n"));
243
244	spin_lock_irqsave(&pas_lock, flags);
245
246	pas_audio_reset(dev);
247	pas_remove_intr(PAS_PCM_INTRBITS);
248	pcm_mode = PCM_NON;
249
250	pcm_busy = 0;
251	spin_unlock_irqrestore(&pas_lock, flags);
252	}
253
254	static void pas_audio_output_block(int dev, unsigned long buf, int count,
255	int intrflag)
256	{
257	unsigned long flags, cnt;
258
259	DEB(printk("pas2_pcm.c: static void pas_audio_output_block(char *buf = %P, int count = %X)\n", buf, count));
260
261	cnt = count;
262	if (audio_devs[dev]->dmap_out->dma > 3)
263	cnt >>= 1;
264
265	if (audio_devs[dev]->flags & DMA_AUTOMODE &&
266	intrflag &&
267	cnt == pcm_count)
268	return;
269
270	spin_lock_irqsave(&pas_lock, flags);
271
272	pas_write(pas_read(0xF8A) & ~0x40,
273	0xF8A);
274
275	/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE); */
276
277	if (audio_devs[dev]->dmap_out->dma > 3)
278	count >>= 1;
279
280	if (count != pcm_count)
281	{
282	pas_write(pas_read(0x0B8A) & ~0x80, 0x0B8A);
283	pas_write(0x40 \| 0x30 \| 0x04, 0x138B);
284	pas_write(count & 0xff, 0x1389);
285	pas_write((count >> 8) & 0xff, 0x1389);
286	pas_write(pas_read(0x0B8A) \| 0x80, 0x0B8A);
287
288	pcm_count = count;
289	}
290	pas_write(pas_read(0x0B8A) \| 0x80 \| 0x40, 0x0B8A);
291	#ifdef NO_TRIGGER
292	pas_write(pas_read(0xF8A) \| 0x40 \| 0x10, 0xF8A);
293	#endif
294
295	pcm_mode = PCM_DAC;
296
297	spin_unlock_irqrestore(&pas_lock, flags);
298	}
299
300	static void pas_audio_start_input(int dev, unsigned long buf, int count,
301	int intrflag)
302	{
303	unsigned long flags;
304	int cnt;
305
306	DEB(printk("pas2_pcm.c: static void pas_audio_start_input(char *buf = %P, int count = %X)\n", buf, count));
307
308	cnt = count;
309	if (audio_devs[dev]->dmap_out->dma > 3)
310	cnt >>= 1;
311
312	if (audio_devs[pas_audiodev]->flags & DMA_AUTOMODE &&
313	intrflag &&
314	cnt == pcm_count)
315	return;
316
317	spin_lock_irqsave(&pas_lock, flags);
318
319	/* DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ); */
320
321	if (audio_devs[dev]->dmap_out->dma > 3)
322	count >>= 1;
323
324	if (count != pcm_count)
325	{
326	pas_write(pas_read(0x0B8A) & ~0x80, 0x0B8A);
327	pas_write(0x40 \| 0x30 \| 0x04, 0x138B);
328	pas_write(count & 0xff, 0x1389);
329	pas_write((count >> 8) & 0xff, 0x1389);
330	pas_write(pas_read(0x0B8A) \| 0x80, 0x0B8A);
331
332	pcm_count = count;
333	}
334	pas_write(pas_read(0x0B8A) \| 0x80 \| 0x40, 0x0B8A);
335	#ifdef NO_TRIGGER
336	pas_write((pas_read(0xF8A) \| 0x40) & ~0x10, 0xF8A);
337	#endif
338
339	pcm_mode = PCM_ADC;
340
341	spin_unlock_irqrestore(&pas_lock, flags);
342	}
343
344	#ifndef NO_TRIGGER
345	static void pas_audio_trigger(int dev, int state)
346	{
347	unsigned long flags;
348
349	spin_lock_irqsave(&pas_lock, flags);
350	state &= open_mode;
351
352	if (state & PCM_ENABLE_OUTPUT)
353	pas_write(pas_read(0xF8A) \| 0x40 \| 0x10, 0xF8A);
354	else if (state & PCM_ENABLE_INPUT)
355	pas_write((pas_read(0xF8A) \| 0x40) & ~0x10, 0xF8A);
356	else
357	pas_write(pas_read(0xF8A) & ~0x40, 0xF8A);
358
359	spin_unlock_irqrestore(&pas_lock, flags);
360	}
361	#endif
362
363	static int pas_audio_prepare_for_input(int dev, int bsize, int bcount)
364	{
365	pas_audio_reset(dev);
366	return 0;
367	}
368
369	static int pas_audio_prepare_for_output(int dev, int bsize, int bcount)
370	{
371	pas_audio_reset(dev);
372	return 0;
373	}
374
375	static struct audio_driver pas_audio_driver =
376	{
377	.owner = THIS_MODULE,
378	.open = pas_audio_open,
379	.close = pas_audio_close,
380	.output_block = pas_audio_output_block,
381	.start_input = pas_audio_start_input,
382	.ioctl = pas_audio_ioctl,
383	.prepare_for_input = pas_audio_prepare_for_input,
384	.prepare_for_output = pas_audio_prepare_for_output,
385	.halt_io = pas_audio_reset,
386	.trigger = pas_audio_trigger
387	};
388
389	void __init pas_pcm_init(struct address_info *hw_config)
390	{
391	DEB(printk("pas2_pcm.c: long pas_pcm_init()\n"));
392
393	pcm_bitsok = 8;
394	if (pas_read(0xEF8B) & 0x08)
395	pcm_bitsok \|= 16;
396
397	pcm_set_speed(DSP_DEFAULT_SPEED);
398
399	if ((pas_audiodev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
400	"Pro Audio Spectrum",
401	&pas_audio_driver,
402	sizeof(struct audio_driver),
403	DMA_AUTOMODE,
404	AFMT_U8 \| AFMT_S16_LE,
405	NULL,
406	hw_config->dma,
407	hw_config->dma)) < 0)
408	printk(KERN_WARNING "PAS16: Too many PCM devices available\n");
409	}
410
411	void pas_pcm_interrupt(unsigned char status, int cause)
412	{
413	if (cause == 1)
414	{
415	/*
416	* Halt the PCM first. Otherwise we don't have time to start a new
417	* block before the PCM chip proceeds to the next sample
418	*/
419
420	if (!(audio_devs[pas_audiodev]->flags & DMA_AUTOMODE))
421	pas_write(pas_read(0xF8A) & ~0x40, 0xF8A);
422
423	switch (pcm_mode)
424	{
425	case PCM_DAC:
426	DMAbuf_outputintr(pas_audiodev, 1);
427	break;
428
429	case PCM_ADC:
430	DMAbuf_inputintr(pas_audiodev);
431	break;
432
433	default:
434	printk(KERN_WARNING "PAS: Unexpected PCM interrupt\n");
435	}
436	}
437	}