patch-2.3.48 linux/drivers/sound/vidc_audio.c

• Lines: 315
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.47/linux/drivers/sound/vidc_audio.c
• Orig date: Thu Jun 17 01:11:35 1999

diff -u --recursive --new-file v2.3.47/linux/drivers/sound/vidc_audio.c linux/drivers/sound/vidc_audio.c
@@ -1,314 +0,0 @@
-/*
- * drivers/sound/vidc_audio.c
- *
- * Audio routines for the VIDC
- *
- * Copyright (C) 1997 Russell King <rmk@arm.uk.linux.org>
- */
-
-#include <asm/hardware.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/iomd.h>
-
-#include "sound_config.h"
-#include "vidc.h"
-
-/*
- * VIDC sound
- *
- * When using SERIAL SOUND mode (external DAC), the number of physical
- * channels is fixed at 2.  Therefore, the sample rate = vidc sample rate.
- */
-
-static int      vidc_adev;
-
-static int      vidc_audio_volume;
-static int      vidc_audio_rate;
-static char     vidc_audio_format;
-static char     vidc_audio_channels;
-
-extern void     vidc_update_filler(int bits, int channels);
-
-int  vidc_audio_get_volume(void)
-{
-	return vidc_audio_volume;
-}
-
-int vidc_audio_set_volume(int newvol)
-{
-	vidc_audio_volume = newvol;
-	return vidc_audio_volume;
-}
-
-static int vidc_audio_set_bits(int fmt)
-{
-	switch (fmt)
-	{
-		case AFMT_QUERY:
-			break;
-		case AFMT_U8:
-		case AFMT_S8:
-		case AFMT_S16_LE:
-			vidc_audio_format = fmt;
-			vidc_update_filler(vidc_audio_format, vidc_audio_channels);
-			break;
-		default:
-			vidc_audio_format = AFMT_S16_LE;
-			vidc_update_filler(vidc_audio_format, vidc_audio_channels);
-			break;
-	}
-	return vidc_audio_format;
-}
-
-static int vidc_audio_set_rate(int rate)
-{
-	if (rate)
-	{
-		int newsize, new2size;
-
-		vidc_audio_rate = ((500000 / rate) + 1) >> 1;
-		if (vidc_audio_rate < 3)
-			vidc_audio_rate = 3;
-		if (vidc_audio_rate > 255)
-			vidc_audio_rate = 255;
-		outl((vidc_audio_rate - 2) | 0xb0000000, IO_VIDC_BASE);
-		outl(0xb1000003, IO_VIDC_BASE);
-		newsize = (10000 / vidc_audio_rate) & ~3;
-		if (newsize < 208)
-			newsize = 208;
-		if (newsize > 4096)
-			newsize = 4096;
-		for (new2size = 128; new2size < newsize; new2size <<= 1);
-			if (new2size - newsize > newsize - (new2size >> 1))
-				new2size >>= 1;
-		dma_bufsize = new2size;
-	}
-	return 250000 / vidc_audio_rate;
-}
-
-static int vidc_audio_set_channels(int channels)
-{
-	switch (channels)
-	{
-		case 0:
-			break;
-		case 1:
-		case 2:
-			vidc_audio_channels = channels;
-			vidc_update_filler(vidc_audio_format, vidc_audio_channels);
-			break;
-		default:
-			vidc_audio_channels = 2;
-			vidc_update_filler(vidc_audio_format, vidc_audio_channels);
-			break;
-	}
-	return vidc_audio_channels;
-}
-
-/*
- * Open the device
- *
- * dev  - device
- * mode - mode to open device (logical OR of OPEN_READ and OPEN_WRITE)
- *
- * Called when opening the DMAbuf               (dmabuf.c:259)
- */
-static int vidc_audio_open(int dev, int mode)
-{
-	if (vidc_busy)
-		return -EBUSY;
-
-	if ((mode & OPEN_READ) && (!mode & OPEN_WRITE))
-	{
-		/* This audio device doesn't have recording capability */
-		return -EIO;
-	}
-	vidc_busy = 1;
-	return 0;
-}
-
-/*
- * Close the device
- *
- * dev  - device
- *
- * Called when closing the DMAbuf               (dmabuf.c:477)
- *      after halt_xfer
- */
-static void vidc_audio_close(int dev)
-{
-	vidc_busy = 0;
-}
-
-static int vidc_audio_ioctl(int dev, unsigned int cmd, caddr_t arg)
-{
-	int ret;
-
-	switch (cmd)
-	{
-		case SOUND_PCM_WRITE_RATE:
-			if (get_user(ret, (int *) arg))
-				return -EFAULT;
-			ret = vidc_audio_set_rate(ret);
-			break;
-
-		case SOUND_PCM_READ_RATE:
-			ret = vidc_audio_set_rate(0);
-			break;
-
-		case SNDCTL_DSP_STEREO:
-			if (get_user(ret, (int *) arg))
-				return -EFAULT;
-			ret = vidc_audio_set_channels(ret + 1) - 1;
-			break;
-
-		case SOUND_PCM_WRITE_CHANNELS:
-			if (get_user(ret, (int *) arg))
-				return -EFAULT;
-			ret = vidc_audio_set_channels(ret);
-			break;
-
-		case SOUND_PCM_READ_CHANNELS:
-			ret = vidc_audio_set_channels(0);
-			break;
-
-		case SNDCTL_DSP_SETFMT:
-			if (get_user(ret, (int *) arg))
-				return -EFAULT;
-			ret = vidc_audio_set_bits(ret);
-			break;
-
-		case SOUND_PCM_READ_BITS:
-			ret = vidc_audio_set_bits(0);
-			break;
-
-		case SOUND_PCM_WRITE_FILTER:
-		case SOUND_PCM_READ_FILTER:
-			return -EINVAL;
-
-		default:
-			return -EINVAL;
-	}
-	return put_user(ret, (int *) arg);
-}
-
-/*
- * Output a block via DMA to sound device
- *
- * dev          - device number
- * buf          - physical address of buffer
- * total_count  - total byte count in buffer
- * intrflag     - set if this has been called from an interrupt (via DMAbuf_outputintr)
- * restart_dma  - set if DMA needs to be re-initialised
- *
- * Called when:
- *  1. Starting output                                  (dmabuf.c:1327)
- *  2.                                                  (dmabuf.c:1504)
- *  3. A new buffer needs to be sent to the device      (dmabuf.c:1579)
- */
-static void vidc_audio_output_block(int dev, unsigned long buf, int total_count,
-			int intrflag)
-{
-	struct audio_operations *adev = audio_devs[dev];
-	struct dma_buffparms *dmap = adev->dmap_out;
-
-	dma_start = buf - (unsigned long)dmap->raw_buf_phys + (unsigned long)dmap->raw_buf;
-	dma_count = total_count;
-
-	if (!(adev->flags & DMA_ACTIVE))
-	{
-		unsigned long flags;
-		save_flags_cli(flags);
-
-		vidc_sound_dma_irq(0, NULL, NULL);
-		outb(DMA_CR_E | 0x10, IOMD_SD0CR);
-
-		restore_flags(flags);
-	}
-}
-
-static void vidc_audio_start_input(int dev, unsigned long buf, int count,
-		       int intrflag)
-{
-}
-
-static int vidc_audio_prepare_for_input(int dev, int bsize, int bcount)
-{
-	return -EINVAL;
-}
-
-static void vidc_audio_dma_interrupt(void)
-{
-	DMAbuf_outputintr(vidc_adev, 1);
-}
-
-/*
- * Prepare for outputting samples to `dev'
- *
- * Each buffer that will be passed will be `bsize' bytes long,
- * with a total of `bcount' buffers.
- *
- * Called when:
- *  1. A trigger enables audio output                   (dmabuf.c:978)
- *  2. We get a write buffer without dma_mode setup     (dmabuf.c:1152)
- *  3. We restart a transfer                            (dmabuf.c:1324)
- */
-static int vidc_audio_prepare_for_output(int dev, int bsize, int bcount)
-{
-	audio_devs[dev]->dmap_out->flags |= DMA_NODMA;
-	dma_interrupt = vidc_audio_dma_interrupt;
-	return 0;
-}
-
-/*
- * Stop our current operation.
- */
-static void vidc_audio_reset(int dev)
-{
-	/* stop interrupts.  Our real interrupt routine
-	 * will close DMA down for us
-	 */
-	dma_interrupt = NULL;
-}
-
-static int vidc_audio_local_qlen(int dev)
-{
-	return /*dma_count !=*/ 0;
-}
-
-static struct audio_driver vidc_audio_driver =
-{
-	vidc_audio_open,		/* open                 */
-	vidc_audio_close,		/* close                */
-	vidc_audio_output_block,	/* output_block         */
-	vidc_audio_start_input,		/* start_input          */
-	vidc_audio_ioctl,		/* ioctl                */
-	vidc_audio_prepare_for_input,	/* prepare_for_input    */
-	vidc_audio_prepare_for_output,	/* prepare_for_output   */
-	vidc_audio_reset,		/* reset                */
-	vidc_audio_local_qlen,		/*+local_qlen           */
-	NULL,				/*+copy_from_user       */
-	NULL,				/*+halt_input           */
-	NULL,				/* halt_output          */
-	NULL,				/*+trigger              */
-	NULL,				/*+set_speed            */
-	NULL,				/*+set_bits             */
-	NULL,				/*+set_channels         */
-};
-
-void vidc_audio_init(struct address_info *hw_config)
-{
-	vidc_audio_volume = 100 | (100 << 8);
-
-	if ((vidc_adev = sound_install_audiodrv(AUDIO_DRIVER_VERSION,
-				"VIDCsound", &vidc_audio_driver,
-				sizeof(struct audio_driver),
-				DMA_AUTOMODE, AFMT_U8 | AFMT_S8 | AFMT_S16_LE,
-				NULL, hw_config->dma, hw_config->dma2)) >= 0)
-	{
-		audio_devs[vidc_adev]->min_fragment = 10;	/* 1024 bytes => 64 buffers */
-		audio_devs[vidc_adev]->mixer_dev = num_mixers;
-	}
-	else printk(KERN_ERR "VIDCsound: Too many PCM devices available\n");
-}