sound: oss: remove driver for SGI HAL2 audio device

With the restructering of the indy button handling the old OSS HAL2 driver
got broken.  Since there is a new ALSA driver for HAL2, the experimental
OSS driver is obsolete and will be removed by this patch.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 0 insertions, 1558 deletions

diff --git a/sound/oss/hal2.c b/sound/oss/hal2.c
deleted file mode 100644
index a94b9df..0000000
--- a/sound/oss/hal2.c
+++ /dev/null
@@ -1,1558 +0,0 @@
-/*
- *  Driver for A2 audio system used in SGI machines
- *  Copyright (c) 2001, 2002, 2003 Ladislav Michl <ladis@linux-mips.org>
- *  
- *  Based on Ulf Carlsson's code.
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as 
- *  published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- *  Supported devices:
- *  /dev/dsp    standard dsp device, (mostly) OSS compatible
- *  /dev/mixer	standard mixer device, (mostly) OSS compatible
- *
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/poll.h>
-#include <linux/interrupt.h>
-#include <linux/dma-mapping.h>
-#include <linux/sound.h>
-#include <linux/soundcard.h>
-#include <linux/mutex.h>
-
-
-#include <asm/io.h>
-#include <asm/sgi/hpc3.h>
-#include <asm/sgi/ip22.h>
-
-#include "hal2.h"
-
-#if 0
-#define DEBUG(args...)		printk(args)
-#else
-#define DEBUG(args...)
-#endif
-
-#if 0 
-#define DEBUG_MIX(args...)	printk(args)
-#else
-#define DEBUG_MIX(args...)
-#endif
-
-/*
- * Before touching these look how it works. It is a bit unusual I know,
- * but it helps to keep things simple. This driver is considered complete
- * and I won't add any new features although hardware has many cool
- * capabilities.
- * (Historical note: HAL2 driver was first written by Ulf Carlsson - ALSA
- * 0.3 running with 2.2.x kernel. Then ALSA changed completely and it
- * seemed easier to me to write OSS driver from scratch - this one. Now
- * when ALSA is official part of 2.6 kernel it's time to write ALSA driver
- * using (hopefully) final version of ALSA interface)
- */
-#define H2_BLOCK_SIZE	1024
-#define H2_ADC_BUFSIZE	8192
-#define H2_DAC_BUFSIZE	16834
-
-struct hal2_pbus {
-	struct hpc3_pbus_dmacregs *pbus;
-	int pbusnr;
-	unsigned int ctrl;		/* Current state of pbus->pbdma_ctrl */
-};
-
-struct hal2_desc {
-	struct hpc_dma_desc desc;
-	u32 cnt;			/* don't touch, it is also padding */
-};
-
-struct hal2_codec {
-	unsigned char *buffer;
-	struct hal2_desc *desc;
-	int desc_count;
-	int tail, head;			/* tail index, head index */
-	struct hal2_pbus pbus;
-	unsigned int format;		/* Audio data format */
-	int voices;			/* mono/stereo */
-	unsigned int sample_rate;
-	unsigned int master;		/* Master frequency */
-	unsigned short mod;		/* MOD value */
-	unsigned short inc;		/* INC value */
-
-	wait_queue_head_t dma_wait;
-	spinlock_t lock;
-	struct mutex sem;
-
-	int usecount;			/* recording and playback are
-					 * independent */
-};
-
-#define H2_MIX_OUTPUT_ATT	0
-#define H2_MIX_INPUT_GAIN	1
-#define H2_MIXERS		2
-struct hal2_mixer {
-	int modcnt;
-	unsigned int master;
-	unsigned int volume[H2_MIXERS];
-};
-
-struct hal2_card {
-	int dev_dsp;			/* audio device */
-	int dev_mixer;			/* mixer device */
-	int dev_midi;			/* midi device */
-
-	struct hal2_ctl_regs *ctl_regs;	/* HAL2 ctl registers */
-	struct hal2_aes_regs *aes_regs;	/* HAL2 aes registers */
-	struct hal2_vol_regs *vol_regs;	/* HAL2 vol registers */
-	struct hal2_syn_regs *syn_regs;	/* HAL2 syn registers */
-
-	struct hal2_codec dac;
-	struct hal2_codec adc;
-	struct hal2_mixer mixer;
-};
-
-#define H2_INDIRECT_WAIT(regs)	while (regs->isr & H2_ISR_TSTATUS);
-
-#define H2_READ_ADDR(addr)	(addr | (1<<7))
-#define H2_WRITE_ADDR(addr)	(addr)
-
-static char *hal2str = "HAL2";
-
-/*
- * I doubt anyone has a machine with two HAL2 cards. It's possible to
- * have two HPC's, so it is probably possible to have two HAL2 cards.
- * Try to deal with it, but note that it is not tested.
- */
-#define MAXCARDS	2
-static struct hal2_card* hal2_card[MAXCARDS];
-
-static const struct {
-	unsigned char idx:4, avail:1;
-} mixtable[SOUND_MIXER_NRDEVICES] = {
-	[SOUND_MIXER_PCM]	= { H2_MIX_OUTPUT_ATT, 1 },	/* voice */
-	[SOUND_MIXER_MIC]	= { H2_MIX_INPUT_GAIN, 1 },	/* mic */
-};
-
-#define H2_SUPPORTED_FORMATS	(AFMT_S16_LE | AFMT_S16_BE)
-
-static inline void hal2_isr_write(struct hal2_card *hal2, u16 val)
-{
-	hal2->ctl_regs->isr = val;
-}
-
-static inline u16 hal2_isr_look(struct hal2_card *hal2)
-{
-	return hal2->ctl_regs->isr;
-}
-
-static inline u16 hal2_rev_look(struct hal2_card *hal2)
-{
-	return hal2->ctl_regs->rev;
-}
-
-#ifdef HAL2_DUMP_REGS
-static u16 hal2_i_look16(struct hal2_card *hal2, u16 addr)
-{
-	struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
-	regs->iar = H2_READ_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-	return regs->idr0;
-}
-#endif
-
-static u32 hal2_i_look32(struct hal2_card *hal2, u16 addr)
-{
-	u32 ret;
-	struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
-	regs->iar = H2_READ_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-	ret = regs->idr0 & 0xffff;
-	regs->iar = H2_READ_ADDR(addr | 0x1);
-	H2_INDIRECT_WAIT(regs);
-	ret |= (regs->idr0 & 0xffff) << 16;
-	return ret;
-}
-
-static void hal2_i_write16(struct hal2_card *hal2, u16 addr, u16 val)
-{
-	struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
-	regs->idr0 = val;
-	regs->idr1 = 0;
-	regs->idr2 = 0;
-	regs->idr3 = 0;
-	regs->iar = H2_WRITE_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-}
-
-static void hal2_i_write32(struct hal2_card *hal2, u16 addr, u32 val)
-{
-	struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
-	regs->idr0 = val & 0xffff;
-	regs->idr1 = val >> 16;
-	regs->idr2 = 0;
-	regs->idr3 = 0;
-	regs->iar = H2_WRITE_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-}
-
-static void hal2_i_setbit16(struct hal2_card *hal2, u16 addr, u16 bit)
-{
-	struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
-	regs->iar = H2_READ_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-	regs->idr0 = (regs->idr0 & 0xffff) | bit;
-	regs->idr1 = 0;
-	regs->idr2 = 0;
-	regs->idr3 = 0;
-	regs->iar = H2_WRITE_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-}
-
-static void hal2_i_setbit32(struct hal2_card *hal2, u16 addr, u32 bit)
-{
-	u32 tmp;
-	struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
-	regs->iar = H2_READ_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-	tmp = (regs->idr0 & 0xffff) | (regs->idr1 << 16) | bit;
-	regs->idr0 = tmp & 0xffff;
-	regs->idr1 = tmp >> 16;
-	regs->idr2 = 0;
-	regs->idr3 = 0;
-	regs->iar = H2_WRITE_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-}
-
-static void hal2_i_clearbit16(struct hal2_card *hal2, u16 addr, u16 bit)
-{
-	struct hal2_ctl_regs *regs = hal2->ctl_regs;
-
-	regs->iar = H2_READ_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-	regs->idr0 = (regs->idr0 & 0xffff) & ~bit;
-	regs->idr1 = 0;
-	regs->idr2 = 0;
-	regs->idr3 = 0;
-	regs->iar = H2_WRITE_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-}
-
-#if 0
-static void hal2_i_clearbit32(struct hal2_card *hal2, u16 addr, u32 bit)
-{
-	u32 tmp;
-	hal2_ctl_regs_t *regs = hal2->ctl_regs;
-
-	regs->iar = H2_READ_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-	tmp = ((regs->idr0 & 0xffff) | (regs->idr1 << 16)) & ~bit;
-	regs->idr0 = tmp & 0xffff;
-	regs->idr1 = tmp >> 16;
-	regs->idr2 = 0;
-	regs->idr3 = 0;
-	regs->iar = H2_WRITE_ADDR(addr);
-	H2_INDIRECT_WAIT(regs);
-}
-#endif
-
-#ifdef HAL2_DUMP_REGS
-static void hal2_dump_regs(struct hal2_card *hal2)
-{
-	DEBUG("isr: %08hx ", hal2_isr_look(hal2));
-	DEBUG("rev: %08hx\n", hal2_rev_look(hal2));
-	DEBUG("relay: %04hx\n", hal2_i_look16(hal2, H2I_RELAY_C));
-	DEBUG("port en: %04hx ", hal2_i_look16(hal2, H2I_DMA_PORT_EN));
-	DEBUG("dma end: %04hx ", hal2_i_look16(hal2, H2I_DMA_END));
-	DEBUG("dma drv: %04hx\n", hal2_i_look16(hal2, H2I_DMA_DRV));
-	DEBUG("syn ctl: %04hx ", hal2_i_look16(hal2, H2I_SYNTH_C));
-	DEBUG("aesrx ctl: %04hx ", hal2_i_look16(hal2, H2I_AESRX_C));
-	DEBUG("aestx ctl: %04hx ", hal2_i_look16(hal2, H2I_AESTX_C));
-	DEBUG("dac ctl1: %04hx ", hal2_i_look16(hal2, H2I_ADC_C1));
-	DEBUG("dac ctl2: %08x ", hal2_i_look32(hal2, H2I_ADC_C2));
-	DEBUG("adc ctl1: %04hx ", hal2_i_look16(hal2, H2I_DAC_C1));
-	DEBUG("adc ctl2: %08x ", hal2_i_look32(hal2, H2I_DAC_C2));
-	DEBUG("syn map: %04hx\n", hal2_i_look16(hal2, H2I_SYNTH_MAP_C));
-	DEBUG("bres1 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES1_C1));
-	DEBUG("bres1 ctl2: %04x ", hal2_i_look32(hal2, H2I_BRES1_C2));
-	DEBUG("bres2 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES2_C1));
-	DEBUG("bres2 ctl2: %04x ", hal2_i_look32(hal2, H2I_BRES2_C2));
-	DEBUG("bres3 ctl1: %04hx ", hal2_i_look16(hal2, H2I_BRES3_C1));
-	DEBUG("bres3 ctl2: %04x\n", hal2_i_look32(hal2, H2I_BRES3_C2));
-}
-#endif
-
-static struct hal2_card* hal2_dsp_find_card(int minor)
-{
-	int i;
-
-	for (i = 0; i < MAXCARDS; i++)
-		if (hal2_card[i] != NULL && hal2_card[i]->dev_dsp == minor)
-			return hal2_card[i];
-	return NULL;
-}
-
-static struct hal2_card* hal2_mixer_find_card(int minor)
-{
-	int i;
-
-	for (i = 0; i < MAXCARDS; i++)
-		if (hal2_card[i] != NULL && hal2_card[i]->dev_mixer == minor)
-			return hal2_card[i];
-	return NULL;
-}
-
-static void hal2_inc_head(struct hal2_codec *codec)
-{
-	codec->head++;
-	if (codec->head == codec->desc_count)
-		codec->head = 0;
-}
-
-static void hal2_inc_tail(struct hal2_codec *codec)
-{
-	codec->tail++;
-	if (codec->tail == codec->desc_count)
-		codec->tail = 0;
-}
-
-static void hal2_dac_interrupt(struct hal2_codec *dac)
-{
-	int running;
-
-	spin_lock(&dac->lock);
-	/* if tail buffer contains zero samples DMA stream was already
-	 * stopped */
-	running = dac->desc[dac->tail].cnt;
-	dac->desc[dac->tail].cnt = 0;
-	dac->desc[dac->tail].desc.cntinfo = HPCDMA_XIE | HPCDMA_EOX;
-	/* we just proccessed empty buffer, don't update tail pointer */
-	if (running)
-		hal2_inc_tail(dac);
-	spin_unlock(&dac->lock);
-
-	wake_up(&dac->dma_wait);
-}
-
-static void hal2_adc_interrupt(struct hal2_codec *adc)
-{
-	int running;
-
-	spin_lock(&adc->lock);
-	/* if head buffer contains nonzero samples DMA stream was already
-	 * stopped */
-	running = !adc->desc[adc->head].cnt;
-	adc->desc[adc->head].cnt = H2_BLOCK_SIZE;
-	adc->desc[adc->head].desc.cntinfo = HPCDMA_XIE | HPCDMA_EOR;
-	/* we just proccessed empty buffer, don't update head pointer */
-	if (running)
-		hal2_inc_head(adc);
-	spin_unlock(&adc->lock);
-
-	wake_up(&adc->dma_wait);
-}
-
-static irqreturn_t hal2_interrupt(int irq, void *dev_id)
-{
-	struct hal2_card *hal2 = dev_id;
-	irqreturn_t ret = IRQ_NONE;
-
-	/* decide what caused this interrupt */
-	if (hal2->dac.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
-		hal2_dac_interrupt(&hal2->dac);
-		ret = IRQ_HANDLED;
-	}
-	if (hal2->adc.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) {
-		hal2_adc_interrupt(&hal2->adc);
-		ret = IRQ_HANDLED;
-	}
-	return ret;
-}
-
-static int hal2_compute_rate(struct hal2_codec *codec, unsigned int rate)
-{
-	unsigned short mod;
-	
-	DEBUG("rate: %d\n", rate);
-	
-	if (rate < 4000) rate = 4000;
-	else if (rate > 48000) rate = 48000;
-
-	if (44100 % rate < 48000 % rate) {
-		mod = 4 * 44100 / rate;
-		codec->master = 44100;
-	} else {
-		mod = 4 * 48000 / rate;
-		codec->master = 48000;
-	}
-
-	codec->inc = 4;
-	codec->mod = mod;
-	rate = 4 * codec->master / mod;
-
-	DEBUG("real_rate: %d\n", rate);
-
-	return rate;
-}
-
-static void hal2_set_dac_rate(struct hal2_card *hal2)
-{
-	unsigned int master = hal2->dac.master;
-	int inc = hal2->dac.inc;
-	int mod = hal2->dac.mod;
-
-	DEBUG("master: %d inc: %d mod: %d\n", master, inc, mod);
-	
-	hal2_i_write16(hal2, H2I_BRES1_C1, (master == 44100) ? 1 : 0);
-	hal2_i_write32(hal2, H2I_BRES1_C2, ((0xffff & (inc - mod - 1)) << 16) | inc);
-}
-
-static void hal2_set_adc_rate(struct hal2_card *hal2)
-{
-	unsigned int master = hal2->adc.master;
-	int inc = hal2->adc.inc;
-	int mod = hal2->adc.mod;
-
-	DEBUG("master: %d inc: %d mod: %d\n", master, inc, mod);
-	
-	hal2_i_write16(hal2, H2I_BRES2_C1, (master == 44100) ? 1 : 0);
-	hal2_i_write32(hal2, H2I_BRES2_C2, ((0xffff & (inc - mod - 1)) << 16) | inc);
-}
-
-static void hal2_setup_dac(struct hal2_card *hal2)
-{
-	unsigned int fifobeg, fifoend, highwater, sample_size;
-	struct hal2_pbus *pbus = &hal2->dac.pbus;
-
-	DEBUG("hal2_setup_dac\n");
-	
-	/* Now we set up some PBUS information. The PBUS needs information about
-	 * what portion of the fifo it will use. If it's receiving or
-	 * transmitting, and finally whether the stream is little endian or big
-	 * endian. The information is written later, on the start call.
-	 */
-	sample_size = 2 * hal2->dac.voices;
-	/* Fifo should be set to hold exactly four samples. Highwater mark
-	 * should be set to two samples. */
-	highwater = (sample_size * 2) >> 1;	/* halfwords */
-	fifobeg = 0;				/* playback is first */
-	fifoend = (sample_size * 4) >> 3;	/* doublewords */
-	pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_LD |
-		     (highwater << 8) | (fifobeg << 16) | (fifoend << 24) |
-		     (hal2->dac.format & AFMT_S16_LE ? HPC3_PDMACTRL_SEL : 0);
-	/* We disable everything before we do anything at all */
-	pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
-	hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
-	/* Setup the HAL2 for playback */
-	hal2_set_dac_rate(hal2);
-	/* Set endianess */
-	if (hal2->dac.format & AFMT_S16_LE)
-		hal2_i_setbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECTX);
-	else
-		hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECTX);
-	/* Set DMA bus */
-	hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
-	/* We are using 1st Bresenham clock generator for playback */
-	hal2_i_write16(hal2, H2I_DAC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
-			| (1 << H2I_C1_CLKID_SHIFT)
-			| (hal2->dac.voices << H2I_C1_DATAT_SHIFT));
-}
-
-static void hal2_setup_adc(struct hal2_card *hal2)
-{
-	unsigned int fifobeg, fifoend, highwater, sample_size;
-	struct hal2_pbus *pbus = &hal2->adc.pbus;
-
-	DEBUG("hal2_setup_adc\n");
-
-	sample_size = 2 * hal2->adc.voices;
-	highwater = (sample_size * 2) >> 1;		/* halfwords */
-	fifobeg = (4 * 4) >> 3;				/* record is second */
-	fifoend = (4 * 4 + sample_size * 4) >> 3;	/* doublewords */
-	pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_RCV | HPC3_PDMACTRL_LD | 
-		     (highwater << 8) | (fifobeg << 16) | (fifoend << 24) |
-		     (hal2->adc.format & AFMT_S16_LE ? HPC3_PDMACTRL_SEL : 0);
-	pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
-	hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
-	/* Setup the HAL2 for record */
-	hal2_set_adc_rate(hal2);
-	/* Set endianess */
-	if (hal2->adc.format & AFMT_S16_LE)
-		hal2_i_setbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECR);
-	else
-		hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECR);
-	/* Set DMA bus */
-	hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr));
-	/* We are using 2nd Bresenham clock generator for record */
-	hal2_i_write16(hal2, H2I_ADC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT)
-			| (2 << H2I_C1_CLKID_SHIFT)
-			| (hal2->adc.voices << H2I_C1_DATAT_SHIFT));
-}
-
-static dma_addr_t hal2_desc_addr(struct hal2_codec *codec, int i)
-{
-	if (--i < 0)
-		i = codec->desc_count - 1;
-	return codec->desc[i].desc.pnext;
-}
-
-static void hal2_start_dac(struct hal2_card *hal2)
-{
-	struct hal2_codec *dac = &hal2->dac;
-	struct hal2_pbus *pbus = &dac->pbus;
-
-	pbus->pbus->pbdma_dptr = hal2_desc_addr(dac, dac->tail);
-	pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
-	/* enable DAC */
-	hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX);
-}
-
-static void hal2_start_adc(struct hal2_card *hal2)
-{
-	struct hal2_codec *adc = &hal2->adc;
-	struct hal2_pbus *pbus = &adc->pbus;
-
-	pbus->pbus->pbdma_dptr = hal2_desc_addr(adc, adc->head);
-	pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT;
-	/* enable ADC */
-	hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR);
-}
-
-static inline void hal2_stop_dac(struct hal2_card *hal2)
-{
-	hal2->dac.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
-	/* The HAL2 itself may remain enabled safely */
-}
-
-static inline void hal2_stop_adc(struct hal2_card *hal2)
-{
-	hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
-}
-
-static int hal2_alloc_dmabuf(struct hal2_codec *codec, int size,
-			     int count, int cntinfo, int dir)
-{
-	struct hal2_desc *desc, *dma_addr;
-	int i;
-
-	DEBUG("allocating %dk DMA buffer.\n", size / 1024);
-
-	codec->buffer = (unsigned char *)__get_free_pages(GFP_KERNEL | GFP_DMA,
-							  get_order(size));
-	if (!codec->buffer)
-		return -ENOMEM;
-	desc = dma_alloc_coherent(NULL, count * sizeof(struct hal2_desc),
-				  (dma_addr_t *)&dma_addr, GFP_KERNEL);
-	if (!desc) {
-		free_pages((unsigned long)codec->buffer, get_order(size));
-		return -ENOMEM;
-	}
-	codec->desc = desc;
-	for (i = 0; i < count; i++) {
-		desc->desc.pbuf = dma_map_single(NULL,
-			(void *)(codec->buffer + i * H2_BLOCK_SIZE),
-			H2_BLOCK_SIZE, dir);
-		desc->desc.cntinfo = cntinfo;
-		desc->desc.pnext = (i == count - 1) ?
-				   (u32)dma_addr : (u32)(dma_addr + i + 1);
-		desc->cnt = 0;
-		desc++;
-	}
-	codec->desc_count = count;
-	codec->head = codec->tail = 0;
-	return 0;
-}
-
-static int hal2_alloc_dac_dmabuf(struct hal2_codec *codec)
-{
-	return hal2_alloc_dmabuf(codec, H2_DAC_BUFSIZE,
-				 H2_DAC_BUFSIZE / H2_BLOCK_SIZE,
-				 HPCDMA_XIE | HPCDMA_EOX,
-				 DMA_TO_DEVICE);
-}
-
-static int hal2_alloc_adc_dmabuf(struct hal2_codec *codec)
-{
-	return hal2_alloc_dmabuf(codec, H2_ADC_BUFSIZE,
-				 H2_ADC_BUFSIZE / H2_BLOCK_SIZE,
-				 HPCDMA_XIE | H2_BLOCK_SIZE,
-				 DMA_TO_DEVICE);
-}
-
-static void hal2_free_dmabuf(struct hal2_codec *codec, int size, int dir)
-{
-	dma_addr_t dma_addr;
-	int i;
-
-	dma_addr = codec->desc[codec->desc_count - 1].desc.pnext;
-	for (i = 0; i < codec->desc_count; i++)
-		dma_unmap_single(NULL, codec->desc[i].desc.pbuf,
-				 H2_BLOCK_SIZE, dir);
-	dma_free_coherent(NULL, codec->desc_count * sizeof(struct hal2_desc),
-			  (void *)codec->desc, dma_addr);
-	free_pages((unsigned long)codec->buffer, get_order(size));
-}
-
-static void hal2_free_dac_dmabuf(struct hal2_codec *codec)
-{
-	return hal2_free_dmabuf(codec, H2_DAC_BUFSIZE, DMA_TO_DEVICE);
-}
-
-static void hal2_free_adc_dmabuf(struct hal2_codec *codec)
-{
-	return hal2_free_dmabuf(codec, H2_ADC_BUFSIZE, DMA_FROM_DEVICE);
-}
-
-/* 
- * Add 'count' bytes to 'buffer' from DMA ring buffers. Return number of
- * bytes added or -EFAULT if copy_from_user failed.
- */
-static int hal2_get_buffer(struct hal2_card *hal2, char *buffer, int count)
-{
-	unsigned long flags;
-	int size, ret = 0;
-	unsigned char *buf;
-	struct hal2_desc *tail;
-	struct hal2_codec *adc = &hal2->adc;
-
-	DEBUG("getting %d bytes ", count);
-
-	spin_lock_irqsave(&adc->lock, flags);
-	tail = &adc->desc[adc->tail];
-	/* enable DMA stream if there are no data */
-	if (!tail->cnt && !(adc->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT))
-		hal2_start_adc(hal2);
-	while (tail->cnt > 0 && count > 0) {
-		size = min((int)tail->cnt, count);
-		buf = &adc->buffer[(adc->tail + 1) * H2_BLOCK_SIZE - tail->cnt];
-		spin_unlock_irqrestore(&adc->lock, flags);
-		dma_sync_single(NULL, tail->desc.pbuf, size, DMA_FROM_DEVICE);
-		if (copy_to_user(buffer, buf, size)) {
-			ret = -EFAULT;
-			goto out;
-		}
-		spin_lock_irqsave(&adc->lock, flags);
-		tail->cnt -= size;
-		/* buffer is empty, update tail pointer */
-		if (tail->cnt == 0) {
-			tail->desc.cntinfo = HPCDMA_XIE | H2_BLOCK_SIZE;
-			hal2_inc_tail(adc);
-			tail = &adc->desc[adc->tail];
-			/* enable DMA stream again if needed */
-			if (!(adc->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT))
-				hal2_start_adc(hal2);
-		}
-		buffer += size;
-		ret += size;
-		count -= size;
-
-		DEBUG("(%d) ", size);
-	}
-	spin_unlock_irqrestore(&adc->lock, flags);
-out:
-	DEBUG("\n");
-
-	return ret;
-} 
-
-/* 
- * Add 'count' bytes from 'buffer' to DMA ring buffers. Return number of
- * bytes added or -EFAULT if copy_from_user failed.
- */
-static int hal2_add_buffer(struct hal2_card *hal2, char *buffer, int count)
-{
-	unsigned long flags;
-	unsigned char *buf;
-	int size, ret = 0;
-	struct hal2_desc *head;
-	struct hal2_codec *dac = &hal2->dac;
-
-	DEBUG("adding %d bytes ", count);
-
-	spin_lock_irqsave(&dac->lock, flags);
-	head = &dac->desc[dac->head];
-	while (head->cnt == 0 && count > 0) {
-		size = min((int)H2_BLOCK_SIZE, count);
-		buf = &dac->buffer[dac->head * H2_BLOCK_SIZE];
-		spin_unlock_irqrestore(&dac->lock, flags);
-		if (copy_from_user(buf, buffer, size)) {
-			ret = -EFAULT;
-			goto out;
-		}
-		dma_sync_single(NULL, head->desc.pbuf, size, DMA_TO_DEVICE);
-		spin_lock_irqsave(&dac->lock, flags);
-		head->desc.cntinfo = size | HPCDMA_XIE;
-		head->cnt = size;
-		buffer += size;
-		ret += size;
-		count -= size;
-		hal2_inc_head(dac);
-		head = &dac->desc[dac->head];
-
-		DEBUG("(%d) ", size);
-	}
-	if (!(dac->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT) && ret > 0)
-		hal2_start_dac(hal2);
-	spin_unlock_irqrestore(&dac->lock, flags);
-out:
-	DEBUG("\n");
-
-	return ret;
-}
-
-#define hal2_reset_dac_pointer(hal2)	hal2_reset_pointer(hal2, 1)
-#define hal2_reset_adc_pointer(hal2)	hal2_reset_pointer(hal2, 0)
-static void hal2_reset_pointer(struct hal2_card *hal2, int is_dac)
-{
-	int i;
-	struct hal2_codec *codec = (is_dac) ? &hal2->dac : &hal2->adc;
-
-	DEBUG("hal2_reset_pointer\n");
-
-	for (i = 0; i < codec->desc_count; i++) {
-		codec->desc[i].cnt = 0;
-		codec->desc[i].desc.cntinfo = HPCDMA_XIE | (is_dac) ?
-					      HPCDMA_EOX : H2_BLOCK_SIZE;
-	}
-	codec->head = codec->tail = 0;
-}
-
-static int hal2_sync_dac(struct hal2_card *hal2)
-{
-	DECLARE_WAITQUEUE(wait, current);
-	struct hal2_codec *dac = &hal2->dac;
-	int ret = 0;
-	unsigned long flags;
-	signed long timeout = 1000 * H2_BLOCK_SIZE * 2 * dac->voices *
-			      HZ / dac->sample_rate / 900;
-
-	while (dac->pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_ISACT) {
-		add_wait_queue(&dac->dma_wait, &wait);
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(timeout);
-		spin_lock_irqsave(&dac->lock, flags);
-		if (dac->desc[dac->tail].cnt)
-			ret = -ETIME;
-		spin_unlock_irqrestore(&dac->lock, flags);
-		if (signal_pending(current))
-			ret = -ERESTARTSYS;
-		if (ret) {
-			hal2_stop_dac(hal2);
-			hal2_reset_dac_pointer(hal2);
-		}
-		remove_wait_queue(&dac->dma_wait, &wait);
-	}
-
-	return ret;
-}
-
-static int hal2_write_mixer(struct hal2_card *hal2, int index, int vol)
-{
-	unsigned int l, r, tmp;
-
-	DEBUG_MIX("mixer %d write\n", index);
-
-	if (index >= SOUND_MIXER_NRDEVICES || !mixtable[index].avail)
-		return -EINVAL;
-
-	r = (vol >> 8) & 0xff;
-	if (r > 100)
-		r = 100;
-	l = vol & 0xff;
-	if (l > 100)
-		l = 100;
-
-	hal2->mixer.volume[mixtable[index].idx] = l | (r << 8);
-
-	switch (mixtable[index].idx) {
-	case H2_MIX_OUTPUT_ATT:
-
-		DEBUG_MIX("output attenuator %d,%d\n", l, r);
-
-		if (r | l) {
-			tmp = hal2_i_look32(hal2, H2I_DAC_C2);
-			tmp &= ~(H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE);
-
-			/* Attenuator has five bits */
-			l = 31 * (100 - l) / 99;
-			r = 31 * (100 - r) / 99;
-
-			DEBUG_MIX("left: %d, right %d\n", l, r);
-
-			tmp |= (l << H2I_C2_L_ATT_SHIFT) & H2I_C2_L_ATT_M;
-			tmp |= (r << H2I_C2_R_ATT_SHIFT) & H2I_C2_R_ATT_M;
-			hal2_i_write32(hal2, H2I_DAC_C2, tmp);
-		} else 
-			hal2_i_setbit32(hal2, H2I_DAC_C2, H2I_C2_MUTE);
-		break;
-	case H2_MIX_INPUT_GAIN:
-
-		DEBUG_MIX("input gain %d,%d\n", l, r);
-
-		tmp = hal2_i_look32(hal2, H2I_ADC_C2);
-		tmp &= ~(H2I_C2_L_GAIN_M | H2I_C2_R_GAIN_M);
-
-		/* Gain control has four bits */
-		l = 16 * l / 100;
-		r = 16 * r / 100;
-
-		DEBUG_MIX("left: %d, right %d\n", l, r);
-
-		tmp |= (l << H2I_C2_L_GAIN_SHIFT) & H2I_C2_L_GAIN_M;
-		tmp |= (r << H2I_C2_R_GAIN_SHIFT) & H2I_C2_R_GAIN_M;
-		hal2_i_write32(hal2, H2I_ADC_C2, tmp);
-
-		break;
-	}
-
-	return 0;
-}
-
-static void hal2_init_mixer(struct hal2_card *hal2)
-{
-	int i;
-
-	for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
-		if (mixtable[i].avail)
-			hal2->mixer.volume[mixtable[i].idx] = 100 | (100 << 8);
-
-	/* disable attenuator */
-	hal2_i_write32(hal2, H2I_DAC_C2, 0);
-	/* set max input gain */
-	hal2_i_write32(hal2, H2I_ADC_C2, H2I_C2_MUTE |
-			(H2I_C2_L_GAIN_M << H2I_C2_L_GAIN_SHIFT) |
-			(H2I_C2_R_GAIN_M << H2I_C2_R_GAIN_SHIFT));
-	/* set max volume */
-	hal2->mixer.master = 0xff;
-	hal2->vol_regs->left = 0xff;
-	hal2->vol_regs->right = 0xff;
-}
-
-/*
- * XXX: later i'll implement mixer for main volume which will be disabled
- * by default. enabling it users will be allowed to have master volume level
- * control on panel in their favourite X desktop
- */
-static void hal2_volume_control(int direction)
-{
-	unsigned int master = hal2_card[0]->mixer.master;
-	struct hal2_vol_regs *vol = hal2_card[0]->vol_regs;
-
-	/* volume up */
-	if (direction > 0 && master < 0xff)
-		master++;
-	/* volume down */
-	else if (direction < 0 && master > 0)
-		master--;
-	/* TODO: mute/unmute */
-	vol->left = master;
-	vol->right = master;
-	hal2_card[0]->mixer.master = master;
-}
-
-static int hal2_mixer_ioctl(struct hal2_card *hal2, unsigned int cmd,
-			    unsigned long arg)
-{
-	int val;
-
-        if (cmd == SOUND_MIXER_INFO) {
-		mixer_info info;
-
-		memset(&info, 0, sizeof(info));
-		strlcpy(info.id, hal2str, sizeof(info.id));
-		strlcpy(info.name, hal2str, sizeof(info.name));
-		info.modify_counter = hal2->mixer.modcnt;
-		if (copy_to_user((void *)arg, &info, sizeof(info)))
-			return -EFAULT;
-		return 0;
-	}
-	if (cmd == SOUND_OLD_MIXER_INFO) {
-		_old_mixer_info info;
-
-		memset(&info, 0, sizeof(info));
-		strlcpy(info.id, hal2str, sizeof(info.id));
-		strlcpy(info.name, hal2str, sizeof(info.name));
-		if (copy_to_user((void *)arg, &info, sizeof(info)))
-			return -EFAULT;
-		return 0;
-	}
-	if (cmd == OSS_GETVERSION)
-		return put_user(SOUND_VERSION, (int *)arg);
-
-	if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
-                return -EINVAL;
-
-        if (_IOC_DIR(cmd) == _IOC_READ) {
-                switch (_IOC_NR(cmd)) {
-		/* Give the current record source */
-		case SOUND_MIXER_RECSRC:
-			val = 0;	/* FIXME */
-			break;
-		/* Give the supported mixers, all of them support stereo */
-                case SOUND_MIXER_DEVMASK:
-                case SOUND_MIXER_STEREODEVS: {
-			int i;
-
-			for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
-				if (mixtable[i].avail)
-					val |= 1 << i;
-			break;
-			}
-		/* Arg contains a bit for each supported recording source */
-                case SOUND_MIXER_RECMASK:
-			val = 0;
-			break;
-                case SOUND_MIXER_CAPS:
-			val = 0;
-			break;
-		/* Read a specific mixer */
-		default: {
-			int i = _IOC_NR(cmd);
-
-			if (i >= SOUND_MIXER_NRDEVICES || !mixtable[i].avail)
-				return -EINVAL;
-			val = hal2->mixer.volume[mixtable[i].idx];
-			break;
-			}
-		}
-		return put_user(val, (int *)arg);
-	}
-
-        if (_IOC_DIR(cmd) != (_IOC_WRITE|_IOC_READ))
-		return -EINVAL;
-
-	hal2->mixer.modcnt++;
-
-	if (get_user(val, (int *)arg))
-		return -EFAULT;
-
-	switch (_IOC_NR(cmd)) {
-	/* Arg contains a bit for each recording source */
-	case SOUND_MIXER_RECSRC:
-		return 0;	/* FIXME */
-	default:
-		return hal2_write_mixer(hal2, _IOC_NR(cmd), val);
-	}
-
-	return 0;
-}
-
-static int hal2_open_mixdev(struct inode *inode, struct file *file)
-{
-	struct hal2_card *hal2 = hal2_mixer_find_card(iminor(inode));
-
-	if (hal2) {
-		file->private_data = hal2;
-		return nonseekable_open(inode, file);
-	}
-	return -ENODEV;
-}
-
-static int hal2_release_mixdev(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-static int hal2_ioctl_mixdev(struct inode *inode, struct file *file,
-			     unsigned int cmd, unsigned long arg)
-{
-	return hal2_mixer_ioctl((struct hal2_card *)file->private_data, cmd, arg);
-}
-
-static int hal2_ioctl(struct inode *inode, struct file *file, 
-		      unsigned int cmd, unsigned long arg)
-{
-	int val;
-	struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
-
-	switch (cmd) {
-	case OSS_GETVERSION:
-		return put_user(SOUND_VERSION, (int *)arg);
-
-	case SNDCTL_DSP_SYNC:
-		if (file->f_mode & FMODE_WRITE)
-			return hal2_sync_dac(hal2);
-		return 0;
-
-	case SNDCTL_DSP_SETDUPLEX:
-		return 0;
-
-	case SNDCTL_DSP_GETCAPS:
-		return put_user(DSP_CAP_DUPLEX | DSP_CAP_MULTI, (int *)arg);
-
-	case SNDCTL_DSP_RESET:
-		if (file->f_mode & FMODE_READ) {
-			hal2_stop_adc(hal2);
-			hal2_reset_adc_pointer(hal2);
-		}
-		if (file->f_mode & FMODE_WRITE) {
-			hal2_stop_dac(hal2);
-			hal2_reset_dac_pointer(hal2);
-		}
-		return 0;
-
- 	case SNDCTL_DSP_SPEED:
-		if (get_user(val, (int *)arg))
-			return -EFAULT;
-		if (file->f_mode & FMODE_READ) {
-			hal2_stop_adc(hal2);
-			val = hal2_compute_rate(&hal2->adc, val);
-			hal2->adc.sample_rate = val;
-			hal2_set_adc_rate(hal2);
-		}
-		if (file->f_mode & FMODE_WRITE) {
-			hal2_stop_dac(hal2);
-			val = hal2_compute_rate(&hal2->dac, val);
-			hal2->dac.sample_rate = val;
-			hal2_set_dac_rate(hal2);
-		}
-		return put_user(val, (int *)arg);
-
-	case SNDCTL_DSP_STEREO:
-		if (get_user(val, (int *)arg))
-			return -EFAULT;
-		if (file->f_mode & FMODE_READ) {
-			hal2_stop_adc(hal2);
-			hal2->adc.voices = (val) ? 2 : 1;
-			hal2_setup_adc(hal2);
-		}
-		if (file->f_mode & FMODE_WRITE) {
-			hal2_stop_dac(hal2);
-			hal2->dac.voices = (val) ? 2 : 1;
-			hal2_setup_dac(hal2);
-                }
-		return 0;
-
-	case SNDCTL_DSP_CHANNELS:
-		if (get_user(val, (int *)arg))
-			return -EFAULT;
-		if (val != 0) {
-			if (file->f_mode & FMODE_READ) {
-				hal2_stop_adc(hal2);
-				hal2->adc.voices = (val == 1) ? 1 : 2;
-				hal2_setup_adc(hal2);
-			}
-			if (file->f_mode & FMODE_WRITE) {
-				hal2_stop_dac(hal2);
-				hal2->dac.voices = (val == 1) ? 1 : 2;
-				hal2_setup_dac(hal2);
-			}
-		}
-		val = -EINVAL;
-		if (file->f_mode & FMODE_READ)
-			val = hal2->adc.voices;
-		if (file->f_mode & FMODE_WRITE)
-			val = hal2->dac.voices;
-		return put_user(val, (int *)arg);
-
-	case SNDCTL_DSP_GETFMTS: /* Returns a mask */
-                return put_user(H2_SUPPORTED_FORMATS, (int *)arg);
-
-	case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
-		if (get_user(val, (int *)arg))
-			return -EFAULT;
-		if (val != AFMT_QUERY) {
-			if (!(val & H2_SUPPORTED_FORMATS))
-				return -EINVAL;
-			if (file->f_mode & FMODE_READ) {
-				hal2_stop_adc(hal2);
-				hal2->adc.format = val;
-				hal2_setup_adc(hal2);
-			}
-			if (file->f_mode & FMODE_WRITE) {
-				hal2_stop_dac(hal2);
-				hal2->dac.format = val;
-				hal2_setup_dac(hal2);
-			}
-		} else {
-			val = -EINVAL;
-			if (file->f_mode & FMODE_READ)
-				val = hal2->adc.format;
-			if (file->f_mode & FMODE_WRITE)
-				val = hal2->dac.format;
-		}
-		return put_user(val, (int *)arg);
-
-	case SNDCTL_DSP_POST:
-		return 0;
-
-	case SNDCTL_DSP_GETOSPACE: {
-		audio_buf_info info;
-		int i;
-		unsigned long flags;
-		struct hal2_codec *dac = &hal2->dac;
-
-		if (!(file->f_mode & FMODE_WRITE))
-			return -EINVAL;
-		info.fragments = 0;
-		spin_lock_irqsave(&dac->lock, flags);
-		for (i = 0; i < dac->desc_count; i++)
-			if (dac->desc[i].cnt == 0)
-				info.fragments++;
-		spin_unlock_irqrestore(&dac->lock, flags);
-		info.fragstotal = dac->desc_count;
-		info.fragsize = H2_BLOCK_SIZE;
-                info.bytes = info.fragsize * info.fragments;
-
-		return copy_to_user((void *)arg, &info, sizeof(info)) ? -EFAULT : 0;
-	}
-
-	case SNDCTL_DSP_GETISPACE: {
-		audio_buf_info info;
-		int i;
-		unsigned long flags;
-		struct hal2_codec *adc = &hal2->adc;
-
-		if (!(file->f_mode & FMODE_READ))
-			return -EINVAL;
-		info.fragments = 0;
-		info.bytes = 0;
-		spin_lock_irqsave(&adc->lock, flags);
-		for (i = 0; i < adc->desc_count; i++)
-			if (adc->desc[i].cnt > 0) {
-				info.fragments++;
-				info.bytes += adc->desc[i].cnt;
-			}
-		spin_unlock_irqrestore(&adc->lock, flags);
-		info.fragstotal = adc->desc_count;
-		info.fragsize = H2_BLOCK_SIZE;
-
-		return copy_to_user((void *)arg, &info, sizeof(info)) ? -EFAULT : 0;
-	}
-
-	case SNDCTL_DSP_NONBLOCK:
-		file->f_flags |= O_NONBLOCK;
-		return 0;
-
-	case SNDCTL_DSP_GETBLKSIZE:
-		return put_user(H2_BLOCK_SIZE, (int *)arg);
-
-	case SNDCTL_DSP_SETFRAGMENT:
-		return 0;
-
-	case SOUND_PCM_READ_RATE:
-		val = -EINVAL;
-		if (file->f_mode & FMODE_READ)
-			val = hal2->adc.sample_rate;
-		if (file->f_mode & FMODE_WRITE)
-			val = hal2->dac.sample_rate;
-		return put_user(val, (int *)arg);
-
-	case SOUND_PCM_READ_CHANNELS:
-		val = -EINVAL;
-		if (file->f_mode & FMODE_READ)
-			val = hal2->adc.voices;
-		if (file->f_mode & FMODE_WRITE)
-			val = hal2->dac.voices;
-		return put_user(val, (int *)arg);
-
-	case SOUND_PCM_READ_BITS:
-		return put_user(16, (int *)arg);
-	}
-
-	return hal2_mixer_ioctl(hal2, cmd, arg);
-}
-
-static ssize_t hal2_read(struct file *file, char *buffer,
-			 size_t count, loff_t *ppos)
-{
-	ssize_t err;
-	struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
-	struct hal2_codec *adc = &hal2->adc;
-
-	if (!count)
-		return 0;
-	if (mutex_lock_interruptible(&adc->sem))
-		return -EINTR;
-	if (file->f_flags & O_NONBLOCK) {
-		err = hal2_get_buffer(hal2, buffer, count);
-		err = err == 0 ? -EAGAIN : err;
-	} else {
-		do {
-			/* ~10% longer */
-			signed long timeout = 1000 * H2_BLOCK_SIZE *
-				2 * adc->voices * HZ / adc->sample_rate / 900;
-			unsigned long flags;
-			DECLARE_WAITQUEUE(wait, current);
-			ssize_t cnt = 0;
-
-			err = hal2_get_buffer(hal2, buffer, count);
-			if (err > 0) {
-				count -= err;
-				cnt += err;
-				buffer += err;
-				err = cnt;
-			}
-			if (count > 0 && err >= 0) {
-				add_wait_queue(&adc->dma_wait, &wait);
-				set_current_state(TASK_INTERRUPTIBLE);
-				schedule_timeout(timeout);
-				spin_lock_irqsave(&adc->lock, flags);
-				if (!adc->desc[adc->tail].cnt)
-					err = -EAGAIN;
-				spin_unlock_irqrestore(&adc->lock, flags);
-				if (signal_pending(current))
-					err = -ERESTARTSYS;
-				remove_wait_queue(&adc->dma_wait, &wait);
-				if (err < 0) {
-					hal2_stop_adc(hal2);
-					hal2_reset_adc_pointer(hal2);
-				}
-			}
-		} while (count > 0 && err >= 0);
-	}
-	mutex_unlock(&adc->sem);
-
-	return err;
-}
-
-static ssize_t hal2_write(struct file *file, const char *buffer,
-			  size_t count, loff_t *ppos)
-{
-	ssize_t err;
-	char *buf = (char*) buffer;
-	struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
-	struct hal2_codec *dac = &hal2->dac;
-
-	if (!count)
-		return 0;
-	if (mutex_lock_interruptible(&dac->sem))
-		return -EINTR;
-	if (file->f_flags & O_NONBLOCK) {
-		err = hal2_add_buffer(hal2, buf, count);
-		err = err == 0 ? -EAGAIN : err;
-	} else {
-		do {
-			/* ~10% longer */
-			signed long timeout = 1000 * H2_BLOCK_SIZE *
-				2 * dac->voices * HZ / dac->sample_rate / 900;
-			unsigned long flags;
-			DECLARE_WAITQUEUE(wait, current);
-			ssize_t cnt = 0;
-
-			err = hal2_add_buffer(hal2, buf, count);
-			if (err > 0) {
-				count -= err;
-				cnt += err;
-				buf += err;
-				err = cnt;
-			}
-			if (count > 0 && err >= 0) {
-				add_wait_queue(&dac->dma_wait, &wait);
-				set_current_state(TASK_INTERRUPTIBLE);
-				schedule_timeout(timeout);
-				spin_lock_irqsave(&dac->lock, flags);
-				if (dac->desc[dac->head].cnt)
-					err = -EAGAIN;
-				spin_unlock_irqrestore(&dac->lock, flags);
-				if (signal_pending(current))
-					err = -ERESTARTSYS;
-				remove_wait_queue(&dac->dma_wait, &wait);
-				if (err < 0) {
-					hal2_stop_dac(hal2);
-					hal2_reset_dac_pointer(hal2);
-				}
-			}
-		} while (count > 0 && err >= 0);
-	}
-	mutex_unlock(&dac->sem);
-
-	return err;
-}
-
-static unsigned int hal2_poll(struct file *file, struct poll_table_struct *wait)
-{
-	unsigned long flags;
-	unsigned int mask = 0;
-	struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
-
-	if (file->f_mode & FMODE_READ) {
-		struct hal2_codec *adc = &hal2->adc;
-
-		poll_wait(file, &adc->dma_wait, wait);
-		spin_lock_irqsave(&adc->lock, flags);
-		if (adc->desc[adc->tail].cnt > 0)
-			mask |= POLLIN;
-		spin_unlock_irqrestore(&adc->lock, flags);
-	}
-
-	if (file->f_mode & FMODE_WRITE) {
-		struct hal2_codec *dac = &hal2->dac;
-
-		poll_wait(file, &dac->dma_wait, wait);
-		spin_lock_irqsave(&dac->lock, flags);
-		if (dac->desc[dac->head].cnt == 0)
-			mask |= POLLOUT;
-		spin_unlock_irqrestore(&dac->lock, flags);
-	}
-
-	return mask;
-}
-
-static int hal2_open(struct inode *inode, struct file *file)
-{
-	int err;
-	struct hal2_card *hal2 = hal2_dsp_find_card(iminor(inode));
-
-	if (!hal2)
-		return -ENODEV;
-	file->private_data = hal2;
-	if (file->f_mode & FMODE_READ) {
-		struct hal2_codec *adc = &hal2->adc;
-
-		if (adc->usecount)
-			return -EBUSY;
-		/* OSS spec wanted us to use 8 bit, 8 kHz mono by default,
-		 * but HAL2 can't do 8bit audio */
-		adc->format = AFMT_S16_BE;
-		adc->voices = 1;
-		adc->sample_rate = hal2_compute_rate(adc, 8000);
-		hal2_set_adc_rate(hal2);
-		err = hal2_alloc_adc_dmabuf(adc);
-		if (err)
-			return err;
-		hal2_setup_adc(hal2);
-		adc->usecount++;
-	}
-	if (file->f_mode & FMODE_WRITE) {
-		struct hal2_codec *dac = &hal2->dac;
-
-		if (dac->usecount)
-			return -EBUSY;
-		dac->format = AFMT_S16_BE;
-		dac->voices = 1;
-		dac->sample_rate = hal2_compute_rate(dac, 8000);
-		hal2_set_dac_rate(hal2);
-		err = hal2_alloc_dac_dmabuf(dac);
-		if (err)
-			return err;
-		hal2_setup_dac(hal2);
-		dac->usecount++;
-	}
-
-	return nonseekable_open(inode, file);
-}
-
-static int hal2_release(struct inode *inode, struct file *file)
-{
-	struct hal2_card *hal2 = (struct hal2_card *) file->private_data;
-
-	if (file->f_mode & FMODE_READ) {
-		struct hal2_codec *adc = &hal2->adc;
-
-		mutex_lock(&adc->sem);
-		hal2_stop_adc(hal2);
-		hal2_free_adc_dmabuf(adc);
-		adc->usecount--;
-		mutex_unlock(&adc->sem);
-	}
-	if (file->f_mode & FMODE_WRITE) {
-		struct hal2_codec *dac = &hal2->dac;
-
-		mutex_lock(&dac->sem);
-		hal2_sync_dac(hal2);
-		hal2_free_dac_dmabuf(dac);
-		dac->usecount--;
-		mutex_unlock(&dac->sem);
-	}
-
-	return 0;
-}
-
-static const struct file_operations hal2_audio_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.read		= hal2_read,
-	.write		= hal2_write,
-	.poll		= hal2_poll,
-	.ioctl		= hal2_ioctl,
-	.open		= hal2_open,
-	.release	= hal2_release,
-};
-
-static const struct file_operations hal2_mixer_fops = {
-	.owner		= THIS_MODULE,
-	.llseek		= no_llseek,
-	.ioctl		= hal2_ioctl_mixdev,
-	.open		= hal2_open_mixdev,
-	.release	= hal2_release_mixdev,
-};
-
-static void hal2_init_codec(struct hal2_codec *codec, struct hpc3_regs *hpc3,
-			    int index)
-{
-	codec->pbus.pbusnr = index;
-	codec->pbus.pbus = &hpc3->pbdma[index];
-	init_waitqueue_head(&codec->dma_wait);
-	mutex_init(&codec->sem);
-	spin_lock_init(&codec->lock);
-}
-
-static int hal2_detect(struct hal2_card *hal2)
-{
-	unsigned short board, major, minor;
-	unsigned short rev;
-
-	/* reset HAL2 */
-	hal2_isr_write(hal2, 0);
-	/* release reset */
-	hal2_isr_write(hal2, H2_ISR_GLOBAL_RESET_N | H2_ISR_CODEC_RESET_N);
-
-	hal2_i_write16(hal2, H2I_RELAY_C, H2I_RELAY_C_STATE); 
-	if ((rev = hal2_rev_look(hal2)) & H2_REV_AUDIO_PRESENT)
-		return -ENODEV;
-
-	board = (rev & H2_REV_BOARD_M) >> 12;
-	major = (rev & H2_REV_MAJOR_CHIP_M) >> 4;
-	minor = (rev & H2_REV_MINOR_CHIP_M);
-
-	printk(KERN_INFO "SGI HAL2 revision %i.%i.%i\n",
-	       board, major, minor);
-
-	return 0;
-}
-
-static int hal2_init_card(struct hal2_card **phal2, struct hpc3_regs *hpc3)
-{
-	int ret = 0;
-	struct hal2_card *hal2;
-
-	hal2 = kzalloc(sizeof(struct hal2_card), GFP_KERNEL);
-	if (!hal2)
-		return -ENOMEM;
-
-	hal2->ctl_regs = (struct hal2_ctl_regs *)hpc3->pbus_extregs[0];
-	hal2->aes_regs = (struct hal2_aes_regs *)hpc3->pbus_extregs[1];
-	hal2->vol_regs = (struct hal2_vol_regs *)hpc3->pbus_extregs[2];
-	hal2->syn_regs = (struct hal2_syn_regs *)hpc3->pbus_extregs[3];
-
-	if (hal2_detect(hal2) < 0) {
-		ret = -ENODEV;
-		goto free_card;
-	}
-
-	hal2_init_codec(&hal2->dac, hpc3, 0);
-	hal2_init_codec(&hal2->adc, hpc3, 1);
-
-	/*
-	 * All DMA channel interfaces in HAL2 are designed to operate with
-	 * PBUS programmed for 2 cycles in D3, 2 cycles in D4 and 2 cycles
-	 * in D5. HAL2 is a 16-bit device which can accept both big and little
-	 * endian format. It assumes that even address bytes are on high
-	 * portion of PBUS (15:8) and assumes that HPC3 is programmed to
-	 * accept a live (unsynchronized) version of P_DREQ_N from HAL2.
-	 */
-#define HAL2_PBUS_DMACFG ((0 << HPC3_DMACFG_D3R_SHIFT) | \
-			  (2 << HPC3_DMACFG_D4R_SHIFT) | \
-			  (2 << HPC3_DMACFG_D5R_SHIFT) | \
-			  (0 << HPC3_DMACFG_D3W_SHIFT) | \
-			  (2 << HPC3_DMACFG_D4W_SHIFT) | \
-			  (2 << HPC3_DMACFG_D5W_SHIFT) | \
-				HPC3_DMACFG_DS16 | \
-				HPC3_DMACFG_EVENHI | \
-				HPC3_DMACFG_RTIME | \
-			  (8 << HPC3_DMACFG_BURST_SHIFT) | \
-				HPC3_DMACFG_DRQLIVE)
-	/*
-	 * Ignore what's mentioned in the specification and write value which
-	 * works in The Real World (TM)
-	 */
-	hpc3->pbus_dmacfg[hal2->dac.pbus.pbusnr][0] = 0x8208844;
-	hpc3->pbus_dmacfg[hal2->adc.pbus.pbusnr][0] = 0x8208844;
-
-	if (request_irq(SGI_HPCDMA_IRQ, hal2_interrupt, IRQF_SHARED,
-			hal2str, hal2)) {
-		printk(KERN_ERR "HAL2: Can't get irq %d\n", SGI_HPCDMA_IRQ);
-		ret = -EAGAIN;
-		goto free_card;
-	}
-
-	hal2->dev_dsp = register_sound_dsp(&hal2_audio_fops, -1);
-	if (hal2->dev_dsp < 0) {
-		ret = hal2->dev_dsp;
-		goto free_irq;
-	}
-
-	hal2->dev_mixer = register_sound_mixer(&hal2_mixer_fops, -1);
-	if (hal2->dev_mixer < 0) {
-		ret = hal2->dev_mixer;
-		goto unregister_dsp;
-	}
-
-	hal2_init_mixer(hal2);
-
-	*phal2 = hal2;
-	return 0;
-unregister_dsp:
-	unregister_sound_dsp(hal2->dev_dsp);
-free_irq:
-	free_irq(SGI_HPCDMA_IRQ, hal2);
-free_card:
-	kfree(hal2);
-
-	return ret;
-}
-
-extern void (*indy_volume_button)(int);
-
-/* 
- * Assuming only one HAL2 card. Mail me if you ever meet machine with
- * more than one.
- */
-static int __init init_hal2(void)
-{
-	int i, error;
-
-	for (i = 0; i < MAXCARDS; i++)
-		hal2_card[i] = NULL;
-
-	error = hal2_init_card(&hal2_card[0], hpc3c0);
-
-	/* let Indy's volume buttons work */
-	if (!error && !ip22_is_fullhouse())
-		indy_volume_button = hal2_volume_control;
-
-	return error;
-
-}
-
-static void __exit exit_hal2(void)
-{
-	int i;
-
-	/* unregister volume butons callback function */
-	indy_volume_button = NULL;
-	
-	for (i = 0; i < MAXCARDS; i++)
-		if (hal2_card[i]) {
-			free_irq(SGI_HPCDMA_IRQ, hal2_card[i]);
-			unregister_sound_dsp(hal2_card[i]->dev_dsp);
-			unregister_sound_mixer(hal2_card[i]->dev_mixer);
-			kfree(hal2_card[i]);
-	}
-}
-
-module_init(init_hal2);
-module_exit(exit_hal2);
-
-MODULE_DESCRIPTION("OSS compatible driver for SGI HAL2 audio");
-MODULE_AUTHOR("Ladislav Michl");
-MODULE_LICENSE("GPL");