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-rw-r--r--sound/oss/au1000.c2216
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diff --git a/sound/oss/au1000.c b/sound/oss/au1000.c
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--- a/sound/oss/au1000.c
+++ /dev/null
@@ -1,2216 +0,0 @@
-/*
- * au1000.c -- Sound driver for Alchemy Au1000 MIPS Internet Edge
- * Processor.
- *
- * Copyright 2001 MontaVista Software Inc.
- * Author: MontaVista Software, Inc.
- * stevel@mvista.com or source@mvista.com
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
- * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * 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.
- *
- *
- * Module command line parameters:
- *
- * Supported devices:
- * /dev/dsp standard OSS /dev/dsp device
- * /dev/mixer standard OSS /dev/mixer device
- *
- * Notes:
- *
- * 1. Much of the OSS buffer allocation, ioctl's, and mmap'ing are
- * taken, slightly modified or not at all, from the ES1371 driver,
- * so refer to the credits in es1371.c for those. The rest of the
- * code (probe, open, read, write, the ISR, etc.) is new.
- *
- * Revision history
- * 06.27.2001 Initial version
- * 03.20.2002 Added mutex locks around read/write methods, to prevent
- * simultaneous access on SMP or preemptible kernels. Also
- * removed the counter/pointer fragment aligning at the end
- * of read/write methods [stevel].
- * 03.21.2002 Add support for coherent DMA on the audio read/write DMA
- * channels [stevel].
- *
- */
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/ioport.h>
-#include <linux/sched.h>
-#include <linux/delay.h>
-#include <linux/sound.h>
-#include <linux/slab.h>
-#include <linux/soundcard.h>
-#include <linux/init.h>
-#include <linux/page-flags.h>
-#include <linux/poll.h>
-#include <linux/pci.h>
-#include <linux/bitops.h>
-#include <linux/proc_fs.h>
-#include <linux/spinlock.h>
-#include <linux/smp_lock.h>
-#include <linux/ac97_codec.h>
-#include <linux/interrupt.h>
-#include <linux/mutex.h>
-
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/mach-au1x00/au1000.h>
-#include <asm/mach-au1x00/au1000_dma.h>
-
-/* --------------------------------------------------------------------- */
-
-#undef OSS_DOCUMENTED_MIXER_SEMANTICS
-#undef AU1000_DEBUG
-#undef AU1000_VERBOSE_DEBUG
-
-#define AU1000_MODULE_NAME "Au1000 audio"
-#define PFX AU1000_MODULE_NAME
-
-#ifdef AU1000_DEBUG
-#define dbg(format, arg...) printk(KERN_DEBUG PFX ": " format "\n" , ## arg)
-#else
-#define dbg(format, arg...) do {} while (0)
-#endif
-#define err(format, arg...) printk(KERN_ERR PFX ": " format "\n" , ## arg)
-#define info(format, arg...) printk(KERN_INFO PFX ": " format "\n" , ## arg)
-#define warn(format, arg...) printk(KERN_WARNING PFX ": " format "\n" , ## arg)
-
-
-/* misc stuff */
-#define POLL_COUNT 0x5000
-#define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
-
-/* Boot options */
-static int vra = 0; // 0 = no VRA, 1 = use VRA if codec supports it
-module_param(vra, bool, 0);
-MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
-
-
-/* --------------------------------------------------------------------- */
-
-struct au1000_state {
- /* soundcore stuff */
- int dev_audio;
-
-#ifdef AU1000_DEBUG
- /* debug /proc entry */
- struct proc_dir_entry *ps;
- struct proc_dir_entry *ac97_ps;
-#endif /* AU1000_DEBUG */
-
- struct ac97_codec codec;
- unsigned codec_base_caps;// AC'97 reg 00h, "Reset Register"
- unsigned codec_ext_caps; // AC'97 reg 28h, "Extended Audio ID"
- int no_vra; // do not use VRA
-
- spinlock_t lock;
- struct mutex open_mutex;
- struct mutex sem;
- mode_t open_mode;
- wait_queue_head_t open_wait;
-
- struct dmabuf {
- unsigned int dmanr; // DMA Channel number
- unsigned sample_rate; // Hz
- unsigned src_factor; // SRC interp/decimation (no vra)
- unsigned sample_size; // 8 or 16
- int num_channels; // 1 = mono, 2 = stereo, 4, 6
- int dma_bytes_per_sample;// DMA bytes per audio sample frame
- int user_bytes_per_sample;// User bytes per audio sample frame
- int cnt_factor; // user-to-DMA bytes per audio
- // sample frame
- void *rawbuf;
- dma_addr_t dmaaddr;
- unsigned buforder;
- unsigned numfrag; // # of DMA fragments in DMA buffer
- unsigned fragshift;
- void *nextIn; // ptr to next-in to DMA buffer
- void *nextOut;// ptr to next-out from DMA buffer
- int count; // current byte count in DMA buffer
- unsigned total_bytes; // total bytes written or read
- unsigned error; // over/underrun
- wait_queue_head_t wait;
- /* redundant, but makes calculations easier */
- unsigned fragsize; // user perception of fragment size
- unsigned dma_fragsize; // DMA (real) fragment size
- unsigned dmasize; // Total DMA buffer size
- // (mult. of DMA fragsize)
- /* OSS stuff */
- unsigned mapped:1;
- unsigned ready:1;
- unsigned stopped:1;
- unsigned ossfragshift;
- int ossmaxfrags;
- unsigned subdivision;
- } dma_dac , dma_adc;
-} au1000_state;
-
-/* --------------------------------------------------------------------- */
-
-
-static inline unsigned ld2(unsigned int x)
-{
- unsigned r = 0;
-
- if (x >= 0x10000) {
- x >>= 16;
- r += 16;
- }
- if (x >= 0x100) {
- x >>= 8;
- r += 8;
- }
- if (x >= 0x10) {
- x >>= 4;
- r += 4;
- }
- if (x >= 4) {
- x >>= 2;
- r += 2;
- }
- if (x >= 2)
- r++;
- return r;
-}
-
-/* --------------------------------------------------------------------- */
-
-static void au1000_delay(int msec)
-{
- unsigned long tmo;
- signed long tmo2;
-
- if (in_interrupt())
- return;
-
- tmo = jiffies + (msec * HZ) / 1000;
- for (;;) {
- tmo2 = tmo - jiffies;
- if (tmo2 <= 0)
- break;
- schedule_timeout(tmo2);
- }
-}
-
-
-/* --------------------------------------------------------------------- */
-
-static u16 rdcodec(struct ac97_codec *codec, u8 addr)
-{
- struct au1000_state *s = (struct au1000_state *)codec->private_data;
- unsigned long flags;
- u32 cmd;
- u16 data;
- int i;
-
- spin_lock_irqsave(&s->lock, flags);
-
- for (i = 0; i < POLL_COUNT; i++)
- if (!(au_readl(AC97C_STATUS) & AC97C_CP))
- break;
- if (i == POLL_COUNT)
- err("rdcodec: codec cmd pending expired!");
-
- cmd = (u32) addr & AC97C_INDEX_MASK;
- cmd |= AC97C_READ; // read command
- au_writel(cmd, AC97C_CMD);
-
- /* now wait for the data */
- for (i = 0; i < POLL_COUNT; i++)
- if (!(au_readl(AC97C_STATUS) & AC97C_CP))
- break;
- if (i == POLL_COUNT) {
- err("rdcodec: read poll expired!");
- return 0;
- }
-
- data = au_readl(AC97C_CMD) & 0xffff;
-
- spin_unlock_irqrestore(&s->lock, flags);
-
- return data;
-}
-
-
-static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
-{
- struct au1000_state *s = (struct au1000_state *)codec->private_data;
- unsigned long flags;
- u32 cmd;
- int i;
-
- spin_lock_irqsave(&s->lock, flags);
-
- for (i = 0; i < POLL_COUNT; i++)
- if (!(au_readl(AC97C_STATUS) & AC97C_CP))
- break;
- if (i == POLL_COUNT)
- err("wrcodec: codec cmd pending expired!");
-
- cmd = (u32) addr & AC97C_INDEX_MASK;
- cmd &= ~AC97C_READ; // write command
- cmd |= ((u32) data << AC97C_WD_BIT); // OR in the data word
- au_writel(cmd, AC97C_CMD);
-
- spin_unlock_irqrestore(&s->lock, flags);
-}
-
-static void waitcodec(struct ac97_codec *codec)
-{
- u16 temp;
- int i;
-
- /* codec_wait is used to wait for a ready state after
- an AC97C_RESET. */
- au1000_delay(10);
-
- // first poll the CODEC_READY tag bit
- for (i = 0; i < POLL_COUNT; i++)
- if (au_readl(AC97C_STATUS) & AC97C_READY)
- break;
- if (i == POLL_COUNT) {
- err("waitcodec: CODEC_READY poll expired!");
- return;
- }
- // get AC'97 powerdown control/status register
- temp = rdcodec(codec, AC97_POWER_CONTROL);
-
- // If anything is powered down, power'em up
- if (temp & 0x7f00) {
- // Power on
- wrcodec(codec, AC97_POWER_CONTROL, 0);
- au1000_delay(100);
- // Reread
- temp = rdcodec(codec, AC97_POWER_CONTROL);
- }
-
- // Check if Codec REF,ANL,DAC,ADC ready
- if ((temp & 0x7f0f) != 0x000f)
- err("codec reg 26 status (0x%x) not ready!!", temp);
-}
-
-
-/* --------------------------------------------------------------------- */
-
-/* stop the ADC before calling */
-static void set_adc_rate(struct au1000_state *s, unsigned rate)
-{
- struct dmabuf *adc = &s->dma_adc;
- struct dmabuf *dac = &s->dma_dac;
- unsigned adc_rate, dac_rate;
- u16 ac97_extstat;
-
- if (s->no_vra) {
- // calc SRC factor
- adc->src_factor = ((96000 / rate) + 1) >> 1;
- adc->sample_rate = 48000 / adc->src_factor;
- return;
- }
-
- adc->src_factor = 1;
-
- ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS);
-
- rate = rate > 48000 ? 48000 : rate;
-
- // enable VRA
- wrcodec(&s->codec, AC97_EXTENDED_STATUS,
- ac97_extstat | AC97_EXTSTAT_VRA);
- // now write the sample rate
- wrcodec(&s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
- // read it back for actual supported rate
- adc_rate = rdcodec(&s->codec, AC97_PCM_LR_ADC_RATE);
-
-#ifdef AU1000_VERBOSE_DEBUG
- dbg("%s: set to %d Hz", __FUNCTION__, adc_rate);
-#endif
-
- // some codec's don't allow unequal DAC and ADC rates, in which case
- // writing one rate reg actually changes both.
- dac_rate = rdcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE);
- if (dac->num_channels > 2)
- wrcodec(&s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
- if (dac->num_channels > 4)
- wrcodec(&s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
-
- adc->sample_rate = adc_rate;
- dac->sample_rate = dac_rate;
-}
-
-/* stop the DAC before calling */
-static void set_dac_rate(struct au1000_state *s, unsigned rate)
-{
- struct dmabuf *dac = &s->dma_dac;
- struct dmabuf *adc = &s->dma_adc;
- unsigned adc_rate, dac_rate;
- u16 ac97_extstat;
-
- if (s->no_vra) {
- // calc SRC factor
- dac->src_factor = ((96000 / rate) + 1) >> 1;
- dac->sample_rate = 48000 / dac->src_factor;
- return;
- }
-
- dac->src_factor = 1;
-
- ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS);
-
- rate = rate > 48000 ? 48000 : rate;
-
- // enable VRA
- wrcodec(&s->codec, AC97_EXTENDED_STATUS,
- ac97_extstat | AC97_EXTSTAT_VRA);
- // now write the sample rate
- wrcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
- // I don't support different sample rates for multichannel,
- // so make these channels the same.
- if (dac->num_channels > 2)
- wrcodec(&s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
- if (dac->num_channels > 4)
- wrcodec(&s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
- // read it back for actual supported rate
- dac_rate = rdcodec(&s->codec, AC97_PCM_FRONT_DAC_RATE);
-
-#ifdef AU1000_VERBOSE_DEBUG
- dbg("%s: set to %d Hz", __FUNCTION__, dac_rate);
-#endif
-
- // some codec's don't allow unequal DAC and ADC rates, in which case
- // writing one rate reg actually changes both.
- adc_rate = rdcodec(&s->codec, AC97_PCM_LR_ADC_RATE);
-
- dac->sample_rate = dac_rate;
- adc->sample_rate = adc_rate;
-}
-
-static void stop_dac(struct au1000_state *s)
-{
- struct dmabuf *db = &s->dma_dac;
- unsigned long flags;
-
- if (db->stopped)
- return;
-
- spin_lock_irqsave(&s->lock, flags);
-
- disable_dma(db->dmanr);
-
- db->stopped = 1;
-
- spin_unlock_irqrestore(&s->lock, flags);
-}
-
-static void stop_adc(struct au1000_state *s)
-{
- struct dmabuf *db = &s->dma_adc;
- unsigned long flags;
-
- if (db->stopped)
- return;
-
- spin_lock_irqsave(&s->lock, flags);
-
- disable_dma(db->dmanr);
-
- db->stopped = 1;
-
- spin_unlock_irqrestore(&s->lock, flags);
-}
-
-
-static void set_xmit_slots(int num_channels)
-{
- u32 ac97_config = au_readl(AC97C_CONFIG) & ~AC97C_XMIT_SLOTS_MASK;
-
- switch (num_channels) {
- case 1: // mono
- case 2: // stereo, slots 3,4
- ac97_config |= (0x3 << AC97C_XMIT_SLOTS_BIT);
- break;
- case 4: // stereo with surround, slots 3,4,7,8
- ac97_config |= (0x33 << AC97C_XMIT_SLOTS_BIT);
- break;
- case 6: // stereo with surround and center/LFE, slots 3,4,6,7,8,9
- ac97_config |= (0x7b << AC97C_XMIT_SLOTS_BIT);
- break;
- }
-
- au_writel(ac97_config, AC97C_CONFIG);
-}
-
-static void set_recv_slots(int num_channels)
-{
- u32 ac97_config = au_readl(AC97C_CONFIG) & ~AC97C_RECV_SLOTS_MASK;
-
- /*
- * Always enable slots 3 and 4 (stereo). Slot 6 is
- * optional Mic ADC, which I don't support yet.
- */
- ac97_config |= (0x3 << AC97C_RECV_SLOTS_BIT);
-
- au_writel(ac97_config, AC97C_CONFIG);
-}
-
-static void start_dac(struct au1000_state *s)
-{
- struct dmabuf *db = &s->dma_dac;
- unsigned long flags;
- unsigned long buf1, buf2;
-
- if (!db->stopped)
- return;
-
- spin_lock_irqsave(&s->lock, flags);
-
- au_readl(AC97C_STATUS); // read status to clear sticky bits
-
- // reset Buffer 1 and 2 pointers to nextOut and nextOut+dma_fragsize
- buf1 = virt_to_phys(db->nextOut);
- buf2 = buf1 + db->dma_fragsize;
- if (buf2 >= db->dmaaddr + db->dmasize)
- buf2 -= db->dmasize;
-
- set_xmit_slots(db->num_channels);
-
- init_dma(db->dmanr);
- if (get_dma_active_buffer(db->dmanr) == 0) {
- clear_dma_done0(db->dmanr); // clear DMA done bit
- set_dma_addr0(db->dmanr, buf1);
- set_dma_addr1(db->dmanr, buf2);
- } else {
- clear_dma_done1(db->dmanr); // clear DMA done bit
- set_dma_addr1(db->dmanr, buf1);
- set_dma_addr0(db->dmanr, buf2);
- }
- set_dma_count(db->dmanr, db->dma_fragsize>>1);
- enable_dma_buffers(db->dmanr);
-
- start_dma(db->dmanr);
-
-#ifdef AU1000_VERBOSE_DEBUG
- dump_au1000_dma_channel(db->dmanr);
-#endif
-
- db->stopped = 0;
-
- spin_unlock_irqrestore(&s->lock, flags);
-}
-
-static void start_adc(struct au1000_state *s)
-{
- struct dmabuf *db = &s->dma_adc;
- unsigned long flags;
- unsigned long buf1, buf2;
-
- if (!db->stopped)
- return;
-
- spin_lock_irqsave(&s->lock, flags);
-
- au_readl(AC97C_STATUS); // read status to clear sticky bits
-
- // reset Buffer 1 and 2 pointers to nextIn and nextIn+dma_fragsize
- buf1 = virt_to_phys(db->nextIn);
- buf2 = buf1 + db->dma_fragsize;
- if (buf2 >= db->dmaaddr + db->dmasize)
- buf2 -= db->dmasize;
-
- set_recv_slots(db->num_channels);
-
- init_dma(db->dmanr);
- if (get_dma_active_buffer(db->dmanr) == 0) {
- clear_dma_done0(db->dmanr); // clear DMA done bit
- set_dma_addr0(db->dmanr, buf1);
- set_dma_addr1(db->dmanr, buf2);
- } else {
- clear_dma_done1(db->dmanr); // clear DMA done bit
- set_dma_addr1(db->dmanr, buf1);
- set_dma_addr0(db->dmanr, buf2);
- }
- set_dma_count(db->dmanr, db->dma_fragsize>>1);
- enable_dma_buffers(db->dmanr);
-
- start_dma(db->dmanr);
-
-#ifdef AU1000_VERBOSE_DEBUG
- dump_au1000_dma_channel(db->dmanr);
-#endif
-
- db->stopped = 0;
-
- spin_unlock_irqrestore(&s->lock, flags);
-}
-
-/* --------------------------------------------------------------------- */
-
-#define DMABUF_DEFAULTORDER (17-PAGE_SHIFT)
-#define DMABUF_MINORDER 1
-
-static inline void dealloc_dmabuf(struct au1000_state *s, struct dmabuf *db)
-{
- struct page *page, *pend;
-
- if (db->rawbuf) {
- /* undo marking the pages as reserved */
- pend = virt_to_page(db->rawbuf +
- (PAGE_SIZE << db->buforder) - 1);
- for (page = virt_to_page(db->rawbuf); page <= pend; page++)
- ClearPageReserved(page);
- dma_free_noncoherent(NULL,
- PAGE_SIZE << db->buforder,
- db->rawbuf,
- db->dmaaddr);
- }
- db->rawbuf = db->nextIn = db->nextOut = NULL;
- db->mapped = db->ready = 0;
-}
-
-static int prog_dmabuf(struct au1000_state *s, struct dmabuf *db)
-{
- int order;
- unsigned user_bytes_per_sec;
- unsigned bufs;
- struct page *page, *pend;
- unsigned rate = db->sample_rate;
-
- if (!db->rawbuf) {
- db->ready = db->mapped = 0;
- for (order = DMABUF_DEFAULTORDER;
- order >= DMABUF_MINORDER; order--)
- if ((db->rawbuf = dma_alloc_noncoherent(NULL,
- PAGE_SIZE << order,
- &db->dmaaddr,
- 0)))
- break;
- if (!db->rawbuf)
- return -ENOMEM;
- db->buforder = order;
- /* now mark the pages as reserved;
- otherwise remap_pfn_range doesn't do what we want */
- pend = virt_to_page(db->rawbuf +
- (PAGE_SIZE << db->buforder) - 1);
- for (page = virt_to_page(db->rawbuf); page <= pend; page++)
- SetPageReserved(page);
- }
-
- db->cnt_factor = 1;
- if (db->sample_size == 8)
- db->cnt_factor *= 2;
- if (db->num_channels == 1)
- db->cnt_factor *= 2;
- db->cnt_factor *= db->src_factor;
-
- db->count = 0;
- db->nextIn = db->nextOut = db->rawbuf;
-
- db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
- db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
- 2 : db->num_channels);
-
- user_bytes_per_sec = rate * db->user_bytes_per_sample;
- bufs = PAGE_SIZE << db->buforder;
- if (db->ossfragshift) {
- if ((1000 << db->ossfragshift) < user_bytes_per_sec)
- db->fragshift = ld2(user_bytes_per_sec/1000);
- else
- db->fragshift = db->ossfragshift;
- } else {
- db->fragshift = ld2(user_bytes_per_sec / 100 /
- (db->subdivision ? db->subdivision : 1));
- if (db->fragshift < 3)
- db->fragshift = 3;
- }
-
- db->fragsize = 1 << db->fragshift;
- db->dma_fragsize = db->fragsize * db->cnt_factor;
- db->numfrag = bufs / db->dma_fragsize;
-
- while (db->numfrag < 4 && db->fragshift > 3) {
- db->fragshift--;
- db->fragsize = 1 << db->fragshift;
- db->dma_fragsize = db->fragsize * db->cnt_factor;
- db->numfrag = bufs / db->dma_fragsize;
- }
-
- if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
- db->numfrag = db->ossmaxfrags;
-
- db->dmasize = db->dma_fragsize * db->numfrag;
- memset(db->rawbuf, 0, bufs);
-
-#ifdef AU1000_VERBOSE_DEBUG
- dbg("rate=%d, samplesize=%d, channels=%d",
- rate, db->sample_size, db->num_channels);
- dbg("fragsize=%d, cnt_factor=%d, dma_fragsize=%d",
- db->fragsize, db->cnt_factor, db->dma_fragsize);
- dbg("numfrag=%d, dmasize=%d", db->numfrag, db->dmasize);
-#endif
-
- db->ready = 1;
- return 0;
-}
-
-static inline int prog_dmabuf_adc(struct au1000_state *s)
-{
- stop_adc(s);
- return prog_dmabuf(s, &s->dma_adc);
-
-}
-
-static inline int prog_dmabuf_dac(struct au1000_state *s)
-{
- stop_dac(s);
- return prog_dmabuf(s, &s->dma_dac);
-}
-
-
-/* hold spinlock for the following */
-static irqreturn_t dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct au1000_state *s = (struct au1000_state *) dev_id;
- struct dmabuf *dac = &s->dma_dac;
- unsigned long newptr;
- u32 ac97c_stat, buff_done;
-
- ac97c_stat = au_readl(AC97C_STATUS);
-#ifdef AU1000_VERBOSE_DEBUG
- if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
- dbg("AC97C status = 0x%08x", ac97c_stat);
-#endif
-
- if ((buff_done = get_dma_buffer_done(dac->dmanr)) == 0) {
- /* fastpath out, to ease interrupt sharing */
- return IRQ_HANDLED;
- }
-
- spin_lock(&s->lock);
-
- if (buff_done != (DMA_D0 | DMA_D1)) {
- dac->nextOut += dac->dma_fragsize;
- if (dac->nextOut >= dac->rawbuf + dac->dmasize)
- dac->nextOut -= dac->dmasize;
-
- /* update playback pointers */
- newptr = virt_to_phys(dac->nextOut) + dac->dma_fragsize;
- if (newptr >= dac->dmaaddr + dac->dmasize)
- newptr -= dac->dmasize;
-
- dac->count -= dac->dma_fragsize;
- dac->total_bytes += dac->dma_fragsize;
-
- if (dac->count <= 0) {
-#ifdef AU1000_VERBOSE_DEBUG
- dbg("dac underrun");
-#endif
- spin_unlock(&s->lock);
- stop_dac(s);
- spin_lock(&s->lock);
- dac->count = 0;
- dac->nextIn = dac->nextOut;
- } else if (buff_done == DMA_D0) {
- clear_dma_done0(dac->dmanr); // clear DMA done bit
- set_dma_count0(dac->dmanr, dac->dma_fragsize>>1);
- set_dma_addr0(dac->dmanr, newptr);
- enable_dma_buffer0(dac->dmanr); // reenable
- } else {
- clear_dma_done1(dac->dmanr); // clear DMA done bit
- set_dma_count1(dac->dmanr, dac->dma_fragsize>>1);
- set_dma_addr1(dac->dmanr, newptr);
- enable_dma_buffer1(dac->dmanr); // reenable
- }
- } else {
- // both done bits set, we missed an interrupt
- spin_unlock(&s->lock);
- stop_dac(s);
- spin_lock(&s->lock);
-
- dac->nextOut += 2*dac->dma_fragsize;
- if (dac->nextOut >= dac->rawbuf + dac->dmasize)
- dac->nextOut -= dac->dmasize;
-
- dac->count -= 2*dac->dma_fragsize;
- dac->total_bytes += 2*dac->dma_fragsize;
-
- if (dac->count > 0) {
- spin_unlock(&s->lock);
- start_dac(s);
- spin_lock(&s->lock);
- }
- }
-
- /* wake up anybody listening */
- if (waitqueue_active(&dac->wait))
- wake_up(&dac->wait);
-
- spin_unlock(&s->lock);
-
- return IRQ_HANDLED;
-}
-
-
-static irqreturn_t adc_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
-{
- struct au1000_state *s = (struct au1000_state *) dev_id;
- struct dmabuf *adc = &s->dma_adc;
- unsigned long newptr;
- u32 ac97c_stat, buff_done;
-
- ac97c_stat = au_readl(AC97C_STATUS);
-#ifdef AU1000_VERBOSE_DEBUG
- if (ac97c_stat & (AC97C_RU | AC97C_RO))
- dbg("AC97C status = 0x%08x", ac97c_stat);
-#endif
-
- if ((buff_done = get_dma_buffer_done(adc->dmanr)) == 0) {
- /* fastpath out, to ease interrupt sharing */
- return IRQ_HANDLED;
- }
-
- spin_lock(&s->lock);
-
- if (buff_done != (DMA_D0 | DMA_D1)) {
- if (adc->count + adc->dma_fragsize > adc->dmasize) {
- // Overrun. Stop ADC and log the error
- spin_unlock(&s->lock);
- stop_adc(s);
- adc->error++;
- err("adc overrun");
- return IRQ_NONE;
- }
-
- adc->nextIn += adc->dma_fragsize;
- if (adc->nextIn >= adc->rawbuf + adc->dmasize)
- adc->nextIn -= adc->dmasize;
-
- /* update capture pointers */
- newptr = virt_to_phys(adc->nextIn) + adc->dma_fragsize;
- if (newptr >= adc->dmaaddr + adc->dmasize)
- newptr -= adc->dmasize;
-
- adc->count += adc->dma_fragsize;
- adc->total_bytes += adc->dma_fragsize;
-
- if (buff_done == DMA_D0) {
- clear_dma_done0(adc->dmanr); // clear DMA done bit
- set_dma_count0(adc->dmanr, adc->dma_fragsize>>1);
- set_dma_addr0(adc->dmanr, newptr);
- enable_dma_buffer0(adc->dmanr); // reenable
- } else {
- clear_dma_done1(adc->dmanr); // clear DMA done bit
- set_dma_count1(adc->dmanr, adc->dma_fragsize>>1);
- set_dma_addr1(adc->dmanr, newptr);
- enable_dma_buffer1(adc->dmanr); // reenable
- }
- } else {
- // both done bits set, we missed an interrupt
- spin_unlock(&s->lock);
- stop_adc(s);
- spin_lock(&s->lock);
-
- if (adc->count + 2*adc->dma_fragsize > adc->dmasize) {
- // Overrun. Log the error
- adc->error++;
- err("adc overrun");
- spin_unlock(&s->lock);
- return IRQ_NONE;
- }
-
- adc->nextIn += 2*adc->dma_fragsize;
- if (adc->nextIn >= adc->rawbuf + adc->dmasize)
- adc->nextIn -= adc->dmasize;
-
- adc->count += 2*adc->dma_fragsize;
- adc->total_bytes += 2*adc->dma_fragsize;
-
- spin_unlock(&s->lock);
- start_adc(s);
- spin_lock(&s->lock);
- }
-
- /* wake up anybody listening */
- if (waitqueue_active(&adc->wait))
- wake_up(&adc->wait);
-
- spin_unlock(&s->lock);
-
- return IRQ_HANDLED;
-}
-
-/* --------------------------------------------------------------------- */
-
-static loff_t au1000_llseek(struct file *file, loff_t offset, int origin)
-{
- return -ESPIPE;
-}
-
-
-static int au1000_open_mixdev(struct inode *inode, struct file *file)
-{
- file->private_data = &au1000_state;
- return nonseekable_open(inode, file);
-}
-
-static int au1000_release_mixdev(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
- unsigned long arg)
-{
- return codec->mixer_ioctl(codec, cmd, arg);
-}
-
-static int au1000_ioctl_mixdev(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct au1000_state *s = (struct au1000_state *)file->private_data;
- struct ac97_codec *codec = &s->codec;
-
- return mixdev_ioctl(codec, cmd, arg);
-}
-
-static /*const */ struct file_operations au1000_mixer_fops = {
- .owner = THIS_MODULE,
- .llseek = au1000_llseek,
- .ioctl = au1000_ioctl_mixdev,
- .open = au1000_open_mixdev,
- .release = au1000_release_mixdev,
-};
-
-/* --------------------------------------------------------------------- */
-
-static int drain_dac(struct au1000_state *s, int nonblock)
-{
- unsigned long flags;
- int count, tmo;
-
- if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
- return 0;
-
- for (;;) {
- spin_lock_irqsave(&s->lock, flags);
- count = s->dma_dac.count;
- spin_unlock_irqrestore(&s->lock, flags);
- if (count <= 0)
- break;
- if (signal_pending(current))
- break;
- if (nonblock)
- return -EBUSY;
- tmo = 1000 * count / (s->no_vra ?
- 48000 : s->dma_dac.sample_rate);
- tmo /= s->dma_dac.dma_bytes_per_sample;
- au1000_delay(tmo);
- }
- if (signal_pending(current))
- return -ERESTARTSYS;
- return 0;
-}
-
-/* --------------------------------------------------------------------- */
-
-static inline u8 S16_TO_U8(s16 ch)
-{
- return (u8) (ch >> 8) + 0x80;
-}
-static inline s16 U8_TO_S16(u8 ch)
-{
- return (s16) (ch - 0x80) << 8;
-}
-
-/*
- * Translates user samples to dma buffer suitable for AC'97 DAC data:
- * If mono, copy left channel to right channel in dma buffer.
- * If 8 bit samples, cvt to 16-bit before writing to dma buffer.
- * If interpolating (no VRA), duplicate every audio frame src_factor times.
- */
-static int translate_from_user(struct dmabuf *db,
- char* dmabuf,
- char* userbuf,
- int dmacount)
-{
- int sample, i;
- int interp_bytes_per_sample;
- int num_samples;
- int mono = (db->num_channels == 1);
- char usersample[12];
- s16 ch, dmasample[6];
-
- if (db->sample_size == 16 && !mono && db->src_factor == 1) {
- // no translation necessary, just copy
- if (copy_from_user(dmabuf, userbuf, dmacount))
- return -EFAULT;
- return dmacount;
- }
-
- interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
- num_samples = dmacount / interp_bytes_per_sample;
-
- for (sample = 0; sample < num_samples; sample++) {
- if (copy_from_user(usersample, userbuf,
- db->user_bytes_per_sample)) {
- dbg("%s: fault", __FUNCTION__);
- return -EFAULT;
- }
-
- for (i = 0; i < db->num_channels; i++) {
- if (db->sample_size == 8)
- ch = U8_TO_S16(usersample[i]);
- else
- ch = *((s16 *) (&usersample[i * 2]));
- dmasample[i] = ch;
- if (mono)
- dmasample[i + 1] = ch; // right channel
- }
-
- // duplicate every audio frame src_factor times
- for (i = 0; i < db->src_factor; i++)
- memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
-
- userbuf += db->user_bytes_per_sample;
- dmabuf += interp_bytes_per_sample;
- }
-
- return num_samples * interp_bytes_per_sample;
-}
-
-/*
- * Translates AC'97 ADC samples to user buffer:
- * If mono, send only left channel to user buffer.
- * If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
- * If decimating (no VRA), skip over src_factor audio frames.
- */
-static int translate_to_user(struct dmabuf *db,
- char* userbuf,
- char* dmabuf,
- int dmacount)
-{
- int sample, i;
- int interp_bytes_per_sample;
- int num_samples;
- int mono = (db->num_channels == 1);
- char usersample[12];
-
- if (db->sample_size == 16 && !mono && db->src_factor == 1) {
- // no translation necessary, just copy
- if (copy_to_user(userbuf, dmabuf, dmacount))
- return -EFAULT;
- return dmacount;
- }
-
- interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
- num_samples = dmacount / interp_bytes_per_sample;
-
- for (sample = 0; sample < num_samples; sample++) {
- for (i = 0; i < db->num_channels; i++) {
- if (db->sample_size == 8)
- usersample[i] =
- S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
- else
- *((s16 *) (&usersample[i * 2])) =
- *((s16 *) (&dmabuf[i * 2]));
- }
-
- if (copy_to_user(userbuf, usersample,
- db->user_bytes_per_sample)) {
- dbg("%s: fault", __FUNCTION__);
- return -EFAULT;
- }
-
- userbuf += db->user_bytes_per_sample;
- dmabuf += interp_bytes_per_sample;
- }
-
- return num_samples * interp_bytes_per_sample;
-}
-
-/*
- * Copy audio data to/from user buffer from/to dma buffer, taking care
- * that we wrap when reading/writing the dma buffer. Returns actual byte
- * count written to or read from the dma buffer.
- */
-static int copy_dmabuf_user(struct dmabuf *db, char* userbuf,
- int count, int to_user)
-{
- char *bufptr = to_user ? db->nextOut : db->nextIn;
- char *bufend = db->rawbuf + db->dmasize;
- int cnt, ret;
-
- if (bufptr + count > bufend) {
- int partial = (int) (bufend - bufptr);
- if (to_user) {
- if ((cnt = translate_to_user(db, userbuf,
- bufptr, partial)) < 0)
- return cnt;
- ret = cnt;
- if ((cnt = translate_to_user(db, userbuf + partial,
- db->rawbuf,
- count - partial)) < 0)
- return cnt;
- ret += cnt;
- } else {
- if ((cnt = translate_from_user(db, bufptr, userbuf,
- partial)) < 0)
- return cnt;
- ret = cnt;
- if ((cnt = translate_from_user(db, db->rawbuf,
- userbuf + partial,
- count - partial)) < 0)
- return cnt;
- ret += cnt;
- }
- } else {
- if (to_user)
- ret = translate_to_user(db, userbuf, bufptr, count);
- else
- ret = translate_from_user(db, bufptr, userbuf, count);
- }
-
- return ret;
-}
-
-
-static ssize_t au1000_read(struct file *file, char *buffer,
- size_t count, loff_t *ppos)
-{
- struct au1000_state *s = (struct au1000_state *)file->private_data;
- struct dmabuf *db = &s->dma_adc;
- DECLARE_WAITQUEUE(wait, current);
- ssize_t ret;
- unsigned long flags;
- int cnt, usercnt, avail;
-
- if (db->mapped)
- return -ENXIO;
- if (!access_ok(VERIFY_WRITE, buffer, count))
- return -EFAULT;
- ret = 0;
-
- count *= db->cnt_factor;
-
- mutex_lock(&s->sem);
- add_wait_queue(&db->wait, &wait);
-
- while (count > 0) {
- // wait for samples in ADC dma buffer
- do {
- if (db->stopped)
- start_adc(s);
- spin_lock_irqsave(&s->lock, flags);
- avail = db->count;
- if (avail <= 0)
- __set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&s->lock, flags);
- if (avail <= 0) {
- if (file->f_flags & O_NONBLOCK) {
- if (!ret)
- ret = -EAGAIN;
- goto out;
- }
- mutex_unlock(&s->sem);
- schedule();
- if (signal_pending(current)) {
- if (!ret)
- ret = -ERESTARTSYS;
- goto out2;
- }
- mutex_lock(&s->sem);
- }
- } while (avail <= 0);
-
- // copy from nextOut to user
- if ((cnt = copy_dmabuf_user(db, buffer,
- count > avail ?
- avail : count, 1)) < 0) {
- if (!ret)
- ret = -EFAULT;
- goto out;
- }
-
- spin_lock_irqsave(&s->lock, flags);
- db->count -= cnt;
- db->nextOut += cnt;
- if (db->nextOut >= db->rawbuf + db->dmasize)
- db->nextOut -= db->dmasize;
- spin_unlock_irqrestore(&s->lock, flags);
-
- count -= cnt;
- usercnt = cnt / db->cnt_factor;
- buffer += usercnt;
- ret += usercnt;
- } // while (count > 0)
-
-out:
- mutex_unlock(&s->sem);
-out2:
- remove_wait_queue(&db->wait, &wait);
- set_current_state(TASK_RUNNING);
- return ret;
-}
-
-static ssize_t au1000_write(struct file *file, const char *buffer,
- size_t count, loff_t * ppos)
-{
- struct au1000_state *s = (struct au1000_state *)file->private_data;
- struct dmabuf *db = &s->dma_dac;
- DECLARE_WAITQUEUE(wait, current);
- ssize_t ret = 0;
- unsigned long flags;
- int cnt, usercnt, avail;
-
-#ifdef AU1000_VERBOSE_DEBUG
- dbg("write: count=%d", count);
-#endif
-
- if (db->mapped)
- return -ENXIO;
- if (!access_ok(VERIFY_READ, buffer, count))
- return -EFAULT;
-
- count *= db->cnt_factor;
-
- mutex_lock(&s->sem);
- add_wait_queue(&db->wait, &wait);
-
- while (count > 0) {
- // wait for space in playback buffer
- do {
- spin_lock_irqsave(&s->lock, flags);
- avail = (int) db->dmasize - db->count;
- if (avail <= 0)
- __set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_irqrestore(&s->lock, flags);
- if (avail <= 0) {
- if (file->f_flags & O_NONBLOCK) {
- if (!ret)
- ret = -EAGAIN;
- goto out;
- }
- mutex_unlock(&s->sem);
- schedule();
- if (signal_pending(current)) {
- if (!ret)
- ret = -ERESTARTSYS;
- goto out2;
- }
- mutex_lock(&s->sem);
- }
- } while (avail <= 0);
-
- // copy from user to nextIn
- if ((cnt = copy_dmabuf_user(db, (char *) buffer,
- count > avail ?
- avail : count, 0)) < 0) {
- if (!ret)
- ret = -EFAULT;
- goto out;
- }
-
- spin_lock_irqsave(&s->lock, flags);
- db->count += cnt;
- db->nextIn += cnt;
- if (db->nextIn >= db->rawbuf + db->dmasize)
- db->nextIn -= db->dmasize;
- spin_unlock_irqrestore(&s->lock, flags);
- if (db->stopped)
- start_dac(s);
-
- count -= cnt;
- usercnt = cnt / db->cnt_factor;
- buffer += usercnt;
- ret += usercnt;
- } // while (count > 0)
-
-out:
- mutex_unlock(&s->sem);
-out2:
- remove_wait_queue(&db->wait, &wait);
- set_current_state(TASK_RUNNING);
- return ret;
-}
-
-
-/* No kernel lock - we have our own spinlock */
-static unsigned int au1000_poll(struct file *file,
- struct poll_table_struct *wait)
-{
- struct au1000_state *s = (struct au1000_state *)file->private_data;
- unsigned long flags;
- unsigned int mask = 0;
-
- if (file->f_mode & FMODE_WRITE) {
- if (!s->dma_dac.ready)
- return 0;
- poll_wait(file, &s->dma_dac.wait, wait);
- }
- if (file->f_mode & FMODE_READ) {
- if (!s->dma_adc.ready)
- return 0;
- poll_wait(file, &s->dma_adc.wait, wait);
- }
-
- spin_lock_irqsave(&s->lock, flags);
-
- if (file->f_mode & FMODE_READ) {
- if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
- mask |= POLLIN | POLLRDNORM;
- }
- if (file->f_mode & FMODE_WRITE) {
- if (s->dma_dac.mapped) {
- if (s->dma_dac.count >=
- (signed)s->dma_dac.dma_fragsize)
- mask |= POLLOUT | POLLWRNORM;
- } else {
- if ((signed) s->dma_dac.dmasize >=
- s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
- mask |= POLLOUT | POLLWRNORM;
- }
- }
- spin_unlock_irqrestore(&s->lock, flags);
- return mask;
-}
-
-static int au1000_mmap(struct file *file, struct vm_area_struct *vma)
-{
- struct au1000_state *s = (struct au1000_state *)file->private_data;
- struct dmabuf *db;
- unsigned long size;
- int ret = 0;
-
- dbg("%s", __FUNCTION__);
-
- lock_kernel();
- mutex_lock(&s->sem);
- if (vma->vm_flags & VM_WRITE)
- db = &s->dma_dac;
- else if (vma->vm_flags & VM_READ)
- db = &s->dma_adc;
- else {
- ret = -EINVAL;
- goto out;
- }
- if (vma->vm_pgoff != 0) {
- ret = -EINVAL;
- goto out;
- }
- size = vma->vm_end - vma->vm_start;
- if (size > (PAGE_SIZE << db->buforder)) {
- ret = -EINVAL;
- goto out;
- }
- if (remap_pfn_range(vma, vma->vm_start, virt_to_phys(db->rawbuf),
- size, vma->vm_page_prot)) {
- ret = -EAGAIN;
- goto out;
- }
- vma->vm_flags &= ~VM_IO;
- db->mapped = 1;
-out:
- mutex_unlock(&s->sem);
- unlock_kernel();
- return ret;
-}
-
-
-#ifdef AU1000_VERBOSE_DEBUG
-static struct ioctl_str_t {
- unsigned int cmd;
- const char *str;
-} ioctl_str[] = {
- {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
- {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
- {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
- {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
- {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
- {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
- {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
- {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
- {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
- {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
- {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
- {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
- {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
- {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
- {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
- {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
- {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
- {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
- {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
- {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
- {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
- {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
- {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
- {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
- {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
- {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
- {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
- {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
- {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
- {OSS_GETVERSION, "OSS_GETVERSION"},
- {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
- {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
- {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
- {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
-};
-#endif
-
-// Need to hold a spin-lock before calling this!
-static int dma_count_done(struct dmabuf *db)
-{
- if (db->stopped)
- return 0;
-
- return db->dma_fragsize - get_dma_residue(db->dmanr);
-}
-
-
-static int au1000_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
-{
- struct au1000_state *s = (struct au1000_state *)file->private_data;
- unsigned long flags;
- audio_buf_info abinfo;
- count_info cinfo;
- int count;
- int val, mapped, ret, diff;
-
- mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
- ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
-
-#ifdef AU1000_VERBOSE_DEBUG
- for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
- if (ioctl_str[count].cmd == cmd)
- break;
- }
- if (count < sizeof(ioctl_str) / sizeof(ioctl_str[0]))
- dbg("ioctl %s, arg=0x%lx", ioctl_str[count].str, arg);
- else
- dbg("ioctl 0x%x unknown, arg=0x%lx", cmd, arg);
-#endif
-
- switch (cmd) {
- case OSS_GETVERSION:
- return put_user(SOUND_VERSION, (int *) arg);
-
- case SNDCTL_DSP_SYNC:
- if (file->f_mode & FMODE_WRITE)
- return drain_dac(s, file->f_flags & O_NONBLOCK);
- return 0;
-
- case SNDCTL_DSP_SETDUPLEX:
- return 0;
-
- case SNDCTL_DSP_GETCAPS:
- return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
- DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
-
- case SNDCTL_DSP_RESET:
- if (file->f_mode & FMODE_WRITE) {
- stop_dac(s);
- synchronize_irq();
- s->dma_dac.count = s->dma_dac.total_bytes = 0;
- s->dma_dac.nextIn = s->dma_dac.nextOut =
- s->dma_dac.rawbuf;
- }
- if (file->f_mode & FMODE_READ) {
- stop_adc(s);
- synchronize_irq();
- s->dma_adc.count = s->dma_adc.total_bytes = 0;
- s->dma_adc.nextIn = s->dma_adc.nextOut =
- s->dma_adc.rawbuf;
- }
- return 0;
-
- case SNDCTL_DSP_SPEED:
- if (get_user(val, (int *) arg))
- return -EFAULT;
- if (val >= 0) {
- if (file->f_mode & FMODE_READ) {
- stop_adc(s);
- set_adc_rate(s, val);
- }
- if (file->f_mode & FMODE_WRITE) {
- stop_dac(s);
- set_dac_rate(s, val);
- }
- if (s->open_mode & FMODE_READ)
- if ((ret = prog_dmabuf_adc(s)))
- return ret;
- if (s->open_mode & FMODE_WRITE)
- if ((ret = prog_dmabuf_dac(s)))
- return ret;
- }
- return put_user((file->f_mode & FMODE_READ) ?
- s->dma_adc.sample_rate :
- s->dma_dac.sample_rate,
- (int *)arg);
-
- case SNDCTL_DSP_STEREO:
- if (get_user(val, (int *) arg))
- return -EFAULT;
- if (file->f_mode & FMODE_READ) {
- stop_adc(s);
- s->dma_adc.num_channels = val ? 2 : 1;
- if ((ret = prog_dmabuf_adc(s)))
- return ret;
- }
- if (file->f_mode & FMODE_WRITE) {
- stop_dac(s);
- s->dma_dac.num_channels = val ? 2 : 1;
- if (s->codec_ext_caps & AC97_EXT_DACS) {
- // disable surround and center/lfe in AC'97
- u16 ext_stat = rdcodec(&s->codec,
- AC97_EXTENDED_STATUS);
- wrcodec(&s->codec, AC97_EXTENDED_STATUS,
- ext_stat | (AC97_EXTSTAT_PRI |
- AC97_EXTSTAT_PRJ |
- AC97_EXTSTAT_PRK));
- }
- if ((ret = prog_dmabuf_dac(s)))
- return ret;
- }
- return 0;
-
- case SNDCTL_DSP_CHANNELS:
- if (get_user(val, (int *) arg))
- return -EFAULT;
- if (val != 0) {
- if (file->f_mode & FMODE_READ) {
- if (val < 0 || val > 2)
- return -EINVAL;
- stop_adc(s);
- s->dma_adc.num_channels = val;
- if ((ret = prog_dmabuf_adc(s)))
- return ret;
- }
- if (file->f_mode & FMODE_WRITE) {
- switch (val) {
- case 1:
- case 2:
- break;
- case 3:
- case 5:
- return -EINVAL;
- case 4:
- if (!(s->codec_ext_caps &
- AC97_EXTID_SDAC))
- return -EINVAL;
- break;
- case 6:
- if ((s->codec_ext_caps &
- AC97_EXT_DACS) != AC97_EXT_DACS)
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
-
- stop_dac(s);
- if (val <= 2 &&
- (s->codec_ext_caps & AC97_EXT_DACS)) {
- // disable surround and center/lfe
- // channels in AC'97
- u16 ext_stat =
- rdcodec(&s->codec,
- AC97_EXTENDED_STATUS);
- wrcodec(&s->codec,
- AC97_EXTENDED_STATUS,
- ext_stat | (AC97_EXTSTAT_PRI |
- AC97_EXTSTAT_PRJ |
- AC97_EXTSTAT_PRK));
- } else if (val >= 4) {
- // enable surround, center/lfe
- // channels in AC'97
- u16 ext_stat =
- rdcodec(&s->codec,
- AC97_EXTENDED_STATUS);
- ext_stat &= ~AC97_EXTSTAT_PRJ;
- if (val == 6)
- ext_stat &=
- ~(AC97_EXTSTAT_PRI |
- AC97_EXTSTAT_PRK);
- wrcodec(&s->codec,
- AC97_EXTENDED_STATUS,
- ext_stat);
- }
-
- s->dma_dac.num_channels = val;
- if ((ret = prog_dmabuf_dac(s)))
- return ret;
- }
- }
- return put_user(val, (int *) arg);
-
- case SNDCTL_DSP_GETFMTS: /* Returns a mask */
- return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
-
- case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
- if (get_user(val, (int *) arg))
- return -EFAULT;
- if (val != AFMT_QUERY) {
- if (file->f_mode & FMODE_READ) {
- stop_adc(s);
- if (val == AFMT_S16_LE)
- s->dma_adc.sample_size = 16;
- else {
- val = AFMT_U8;
- s->dma_adc.sample_size = 8;
- }
- if ((ret = prog_dmabuf_adc(s)))
- return ret;
- }
- if (file->f_mode & FMODE_WRITE) {
- stop_dac(s);
- if (val == AFMT_S16_LE)
- s->dma_dac.sample_size = 16;
- else {
- val = AFMT_U8;
- s->dma_dac.sample_size = 8;
- }
- if ((ret = prog_dmabuf_dac(s)))
- return ret;
- }
- } else {
- if (file->f_mode & FMODE_READ)
- val = (s->dma_adc.sample_size == 16) ?
- AFMT_S16_LE : AFMT_U8;
- else
- val = (s->dma_dac.sample_size == 16) ?
- AFMT_S16_LE : AFMT_U8;
- }
- return put_user(val, (int *) arg);
-
- case SNDCTL_DSP_POST:
- return 0;
-
- case SNDCTL_DSP_GETTRIGGER:
- val = 0;
- spin_lock_irqsave(&s->lock, flags);
- if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
- val |= PCM_ENABLE_INPUT;
- if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
- val |= PCM_ENABLE_OUTPUT;
- spin_unlock_irqrestore(&s->lock, flags);
- return put_user(val, (int *) arg);
-
- case SNDCTL_DSP_SETTRIGGER:
- if (get_user(val, (int *) arg))
- return -EFAULT;
- if (file->f_mode & FMODE_READ) {
- if (val & PCM_ENABLE_INPUT)
- start_adc(s);
- else
- stop_adc(s);
- }
- if (file->f_mode & FMODE_WRITE) {
- if (val & PCM_ENABLE_OUTPUT)
- start_dac(s);
- else
- stop_dac(s);
- }
- return 0;
-
- case SNDCTL_DSP_GETOSPACE:
- if (!(file->f_mode & FMODE_WRITE))
- return -EINVAL;
- abinfo.fragsize = s->dma_dac.fragsize;
- spin_lock_irqsave(&s->lock, flags);
- count = s->dma_dac.count;
- count -= dma_count_done(&s->dma_dac);
- spin_unlock_irqrestore(&s->lock, flags);
- if (count < 0)
- count = 0;
- abinfo.bytes = (s->dma_dac.dmasize - count) /
- s->dma_dac.cnt_factor;
- abinfo.fragstotal = s->dma_dac.numfrag;
- abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
-#ifdef AU1000_VERBOSE_DEBUG
- dbg("bytes=%d, fragments=%d", abinfo.bytes, abinfo.fragments);
-#endif
- return copy_to_user((void *) arg, &abinfo,
- sizeof(abinfo)) ? -EFAULT : 0;
-
- case SNDCTL_DSP_GETISPACE:
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
- abinfo.fragsize = s->dma_adc.fragsize;
- spin_lock_irqsave(&s->lock, flags);
- count = s->dma_adc.count;
- count += dma_count_done(&s->dma_adc);
- spin_unlock_irqrestore(&s->lock, flags);
- if (count < 0)
- count = 0;
- abinfo.bytes = count / s->dma_adc.cnt_factor;
- abinfo.fragstotal = s->dma_adc.numfrag;
- abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
- return copy_to_user((void *) arg, &abinfo,
- sizeof(abinfo)) ? -EFAULT : 0;
-
- case SNDCTL_DSP_NONBLOCK:
- file->f_flags |= O_NONBLOCK;
- return 0;
-
- case SNDCTL_DSP_GETODELAY:
- if (!(file->f_mode & FMODE_WRITE))
- return -EINVAL;
- spin_lock_irqsave(&s->lock, flags);
- count = s->dma_dac.count;
- count -= dma_count_done(&s->dma_dac);
- spin_unlock_irqrestore(&s->lock, flags);
- if (count < 0)
- count = 0;
- count /= s->dma_dac.cnt_factor;
- return put_user(count, (int *) arg);
-
- case SNDCTL_DSP_GETIPTR:
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
- spin_lock_irqsave(&s->lock, flags);
- cinfo.bytes = s->dma_adc.total_bytes;
- count = s->dma_adc.count;
- if (!s->dma_adc.stopped) {
- diff = dma_count_done(&s->dma_adc);
- count += diff;
- cinfo.bytes += diff;
- cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff -
- s->dma_adc.dmaaddr;
- } else
- cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
- s->dma_adc.dmaaddr;
- if (s->dma_adc.mapped)
- s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
- spin_unlock_irqrestore(&s->lock, flags);
- if (count < 0)
- count = 0;
- cinfo.blocks = count >> s->dma_adc.fragshift;
- return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
-
- case SNDCTL_DSP_GETOPTR:
- if (!(file->f_mode & FMODE_READ))
- return -EINVAL;
- spin_lock_irqsave(&s->lock, flags);
- cinfo.bytes = s->dma_dac.total_bytes;
- count = s->dma_dac.count;
- if (!s->dma_dac.stopped) {
- diff = dma_count_done(&s->dma_dac);
- count -= diff;
- cinfo.bytes += diff;
- cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
- s->dma_dac.dmaaddr;
- } else
- cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
- s->dma_dac.dmaaddr;
- if (s->dma_dac.mapped)
- s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
- spin_unlock_irqrestore(&s->lock, flags);
- if (count < 0)
- count = 0;
- cinfo.blocks = count >> s->dma_dac.fragshift;
- return copy_to_user((void *) arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
-
- case SNDCTL_DSP_GETBLKSIZE:
- if (file->f_mode & FMODE_WRITE)
- return put_user(s->dma_dac.fragsize, (int *) arg);
- else
- return put_user(s->dma_adc.fragsize, (int *) arg);
-
- case SNDCTL_DSP_SETFRAGMENT:
- if (get_user(val, (int *) arg))
- return -EFAULT;
- if (file->f_mode & FMODE_READ) {
- stop_adc(s);
- s->dma_adc.ossfragshift = val & 0xffff;
- s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
- if (s->dma_adc.ossfragshift < 4)
- s->dma_adc.ossfragshift = 4;
- if (s->dma_adc.ossfragshift > 15)
- s->dma_adc.ossfragshift = 15;
- if (s->dma_adc.ossmaxfrags < 4)
- s->dma_adc.ossmaxfrags = 4;
- if ((ret = prog_dmabuf_adc(s)))
- return ret;
- }
- if (file->f_mode & FMODE_WRITE) {
- stop_dac(s);
- s->dma_dac.ossfragshift = val & 0xffff;
- s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
- if (s->dma_dac.ossfragshift < 4)
- s->dma_dac.ossfragshift = 4;
- if (s->dma_dac.ossfragshift > 15)
- s->dma_dac.ossfragshift = 15;
- if (s->dma_dac.ossmaxfrags < 4)
- s->dma_dac.ossmaxfrags = 4;
- if ((ret = prog_dmabuf_dac(s)))
- return ret;
- }
- return 0;
-
- case SNDCTL_DSP_SUBDIVIDE:
- if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
- (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
- return -EINVAL;
- if (get_user(val, (int *) arg))
- return -EFAULT;
- if (val != 1 && val != 2 && val != 4)
- return -EINVAL;
- if (file->f_mode & FMODE_READ) {
- stop_adc(s);
- s->dma_adc.subdivision = val;
- if ((ret = prog_dmabuf_adc(s)))
- return ret;
- }
- if (file->f_mode & FMODE_WRITE) {
- stop_dac(s);
- s->dma_dac.subdivision = val;
- if ((ret = prog_dmabuf_dac(s)))
- return ret;
- }
- return 0;
-
- case SOUND_PCM_READ_RATE:
- return put_user((file->f_mode & FMODE_READ) ?
- s->dma_adc.sample_rate :
- s->dma_dac.sample_rate,
- (int *)arg);
-
- case SOUND_PCM_READ_CHANNELS:
- if (file->f_mode & FMODE_READ)
- return put_user(s->dma_adc.num_channels, (int *)arg);
- else
- return put_user(s->dma_dac.num_channels, (int *)arg);
-
- case SOUND_PCM_READ_BITS:
- if (file->f_mode & FMODE_READ)
- return put_user(s->dma_adc.sample_size, (int *)arg);
- else
- return put_user(s->dma_dac.sample_size, (int *)arg);
-
- case SOUND_PCM_WRITE_FILTER:
- case SNDCTL_DSP_SETSYNCRO:
- case SOUND_PCM_READ_FILTER:
- return -EINVAL;
- }
-
- return mixdev_ioctl(&s->codec, cmd, arg);
-}
-
-
-static int au1000_open(struct inode *inode, struct file *file)
-{
- int minor = iminor(inode);
- DECLARE_WAITQUEUE(wait, current);
- struct au1000_state *s = &au1000_state;
- int ret;
-
-#ifdef AU1000_VERBOSE_DEBUG
- if (file->f_flags & O_NONBLOCK)
- dbg("%s: non-blocking", __FUNCTION__);
- else
- dbg("%s: blocking", __FUNCTION__);
-#endif
-
- file->private_data = s;
- /* wait for device to become free */
- mutex_lock(&s->open_mutex);
- while (s->open_mode & file->f_mode) {
- if (file->f_flags & O_NONBLOCK) {
- mutex_unlock(&s->open_mutex);
- return -EBUSY;
- }
- add_wait_queue(&s->open_wait, &wait);
- __set_current_state(TASK_INTERRUPTIBLE);
- mutex_unlock(&s->open_mutex);
- schedule();
- remove_wait_queue(&s->open_wait, &wait);
- set_current_state(TASK_RUNNING);
- if (signal_pending(current))
- return -ERESTARTSYS;
- mutex_lock(&s->open_mutex);
- }
-
- stop_dac(s);
- stop_adc(s);
-
- if (file->f_mode & FMODE_READ) {
- s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
- s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
- s->dma_adc.num_channels = 1;
- s->dma_adc.sample_size = 8;
- set_adc_rate(s, 8000);
- if ((minor & 0xf) == SND_DEV_DSP16)
- s->dma_adc.sample_size = 16;
- }
-
- if (file->f_mode & FMODE_WRITE) {
- s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
- s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
- s->dma_dac.num_channels = 1;
- s->dma_dac.sample_size = 8;
- set_dac_rate(s, 8000);
- if ((minor & 0xf) == SND_DEV_DSP16)
- s->dma_dac.sample_size = 16;
- }
-
- if (file->f_mode & FMODE_READ) {
- if ((ret = prog_dmabuf_adc(s)))
- return ret;
- }
- if (file->f_mode & FMODE_WRITE) {
- if ((ret = prog_dmabuf_dac(s)))
- return ret;
- }
-
- s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
- mutex_unlock(&s->open_mutex);
- mutex_init(&s->sem);
- return nonseekable_open(inode, file);
-}
-
-static int au1000_release(struct inode *inode, struct file *file)
-{
- struct au1000_state *s = (struct au1000_state *)file->private_data;
-
- lock_kernel();
-
- if (file->f_mode & FMODE_WRITE) {
- unlock_kernel();
- drain_dac(s, file->f_flags & O_NONBLOCK);
- lock_kernel();
- }
-
- mutex_lock(&s->open_mutex);
- if (file->f_mode & FMODE_WRITE) {
- stop_dac(s);
- dealloc_dmabuf(s, &s->dma_dac);
- }
- if (file->f_mode & FMODE_READ) {
- stop_adc(s);
- dealloc_dmabuf(s, &s->dma_adc);
- }
- s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
- mutex_unlock(&s->open_mutex);
- wake_up(&s->open_wait);
- unlock_kernel();
- return 0;
-}
-
-static /*const */ struct file_operations au1000_audio_fops = {
- .owner = THIS_MODULE,
- .llseek = au1000_llseek,
- .read = au1000_read,
- .write = au1000_write,
- .poll = au1000_poll,
- .ioctl = au1000_ioctl,
- .mmap = au1000_mmap,
- .open = au1000_open,
- .release = au1000_release,
-};
-
-
-/* --------------------------------------------------------------------- */
-
-
-/* --------------------------------------------------------------------- */
-
-/*
- * for debugging purposes, we'll create a proc device that dumps the
- * CODEC chipstate
- */
-
-#ifdef AU1000_DEBUG
-static int proc_au1000_dump(char *buf, char **start, off_t fpos,
- int length, int *eof, void *data)
-{
- struct au1000_state *s = &au1000_state;
- int cnt, len = 0;
-
- /* print out header */
- len += sprintf(buf + len, "\n\t\tAU1000 Audio Debug\n\n");
-
- // print out digital controller state
- len += sprintf(buf + len, "AU1000 Audio Controller registers\n");
- len += sprintf(buf + len, "---------------------------------\n");
- len += sprintf (buf + len, "AC97C_CONFIG = %08x\n",
- au_readl(AC97C_CONFIG));
- len += sprintf (buf + len, "AC97C_STATUS = %08x\n",
- au_readl(AC97C_STATUS));
- len += sprintf (buf + len, "AC97C_CNTRL = %08x\n",
- au_readl(AC97C_CNTRL));
-
- /* print out CODEC state */
- len += sprintf(buf + len, "\nAC97 CODEC registers\n");
- len += sprintf(buf + len, "----------------------\n");
- for (cnt = 0; cnt <= 0x7e; cnt += 2)
- len += sprintf(buf + len, "reg %02x = %04x\n",
- cnt, rdcodec(&s->codec, cnt));
-
- if (fpos >= len) {
- *start = buf;
- *eof = 1;
- return 0;
- }
- *start = buf + fpos;
- if ((len -= fpos) > length)
- return length;
- *eof = 1;
- return len;
-
-}
-#endif /* AU1000_DEBUG */
-
-/* --------------------------------------------------------------------- */
-
-MODULE_AUTHOR("Monta Vista Software, stevel@mvista.com");
-MODULE_DESCRIPTION("Au1000 Audio Driver");
-
-/* --------------------------------------------------------------------- */
-
-static int __devinit au1000_probe(void)
-{
- struct au1000_state *s = &au1000_state;
- int val;
-#ifdef AU1000_DEBUG
- char proc_str[80];
-#endif
-
- memset(s, 0, sizeof(struct au1000_state));
-
- init_waitqueue_head(&s->dma_adc.wait);
- init_waitqueue_head(&s->dma_dac.wait);
- init_waitqueue_head(&s->open_wait);
- mutex_init(&s->open_mutex);
- spin_lock_init(&s->lock);
- s->codec.private_data = s;
- s->codec.id = 0;
- s->codec.codec_read = rdcodec;
- s->codec.codec_write = wrcodec;
- s->codec.codec_wait = waitcodec;
-
- if (!request_mem_region(CPHYSADDR(AC97C_CONFIG),
- 0x14, AU1000_MODULE_NAME)) {
- err("AC'97 ports in use");
- return -1;
- }
- // Allocate the DMA Channels
- if ((s->dma_dac.dmanr = request_au1000_dma(DMA_ID_AC97C_TX,
- "audio DAC",
- dac_dma_interrupt,
- IRQF_DISABLED, s)) < 0) {
- err("Can't get DAC DMA");
- goto err_dma1;
- }
- if ((s->dma_adc.dmanr = request_au1000_dma(DMA_ID_AC97C_RX,
- "audio ADC",
- adc_dma_interrupt,
- IRQF_DISABLED, s)) < 0) {
- err("Can't get ADC DMA");
- goto err_dma2;
- }
-
- info("DAC: DMA%d/IRQ%d, ADC: DMA%d/IRQ%d",
- s->dma_dac.dmanr, get_dma_done_irq(s->dma_dac.dmanr),
- s->dma_adc.dmanr, get_dma_done_irq(s->dma_adc.dmanr));
-
- // enable DMA coherency in read/write DMA channels
- set_dma_mode(s->dma_dac.dmanr,
- get_dma_mode(s->dma_dac.dmanr) & ~DMA_NC);
- set_dma_mode(s->dma_adc.dmanr,
- get_dma_mode(s->dma_adc.dmanr) & ~DMA_NC);
-
- /* register devices */
-
- if ((s->dev_audio = register_sound_dsp(&au1000_audio_fops, -1)) < 0)
- goto err_dev1;
- if ((s->codec.dev_mixer =
- register_sound_mixer(&au1000_mixer_fops, -1)) < 0)
- goto err_dev2;
-
-#ifdef AU1000_DEBUG
- /* intialize the debug proc device */
- s->ps = create_proc_read_entry(AU1000_MODULE_NAME, 0, NULL,
- proc_au1000_dump, NULL);
-#endif /* AU1000_DEBUG */
-
- // configure pins for AC'97
- au_writel(au_readl(SYS_PINFUNC) & ~0x02, SYS_PINFUNC);
-
- // Assert reset for 10msec to the AC'97 controller, and enable clock
- au_writel(AC97C_RS | AC97C_CE, AC97C_CNTRL);
- au1000_delay(10);
- au_writel(AC97C_CE, AC97C_CNTRL);
- au1000_delay(10); // wait for clock to stabilize
-
- /* cold reset the AC'97 */
- au_writel(AC97C_RESET, AC97C_CONFIG);
- au1000_delay(10);
- au_writel(0, AC97C_CONFIG);
- /* need to delay around 500msec(bleech) to give
- some CODECs enough time to wakeup */
- au1000_delay(500);
-
- /* warm reset the AC'97 to start the bitclk */
- au_writel(AC97C_SG | AC97C_SYNC, AC97C_CONFIG);
- udelay(100);
- au_writel(0, AC97C_CONFIG);
-
- /* codec init */
- if (!ac97_probe_codec(&s->codec))
- goto err_dev3;
-
- s->codec_base_caps = rdcodec(&s->codec, AC97_RESET);
- s->codec_ext_caps = rdcodec(&s->codec, AC97_EXTENDED_ID);
- info("AC'97 Base/Extended ID = %04x/%04x",
- s->codec_base_caps, s->codec_ext_caps);
-
- /*
- * On the Pb1000, audio playback is on the AUX_OUT
- * channel (which defaults to LNLVL_OUT in AC'97
- * rev 2.2) so make sure this channel is listed
- * as supported (soundcard.h calls this channel
- * ALTPCM). ac97_codec.c does not handle detection
- * of this channel correctly.
- */
- s->codec.supported_mixers |= SOUND_MASK_ALTPCM;
- /*
- * Now set AUX_OUT's default volume.
- */
- val = 0x4343;
- mixdev_ioctl(&s->codec, SOUND_MIXER_WRITE_ALTPCM,
- (unsigned long) &val);
-
- if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
- // codec does not support VRA
- s->no_vra = 1;
- } else if (!vra) {
- // Boot option says disable VRA
- u16 ac97_extstat = rdcodec(&s->codec, AC97_EXTENDED_STATUS);
- wrcodec(&s->codec, AC97_EXTENDED_STATUS,
- ac97_extstat & ~AC97_EXTSTAT_VRA);
- s->no_vra = 1;
- }
- if (s->no_vra)
- info("no VRA, interpolating and decimating");
-
- /* set mic to be the recording source */
- val = SOUND_MASK_MIC;
- mixdev_ioctl(&s->codec, SOUND_MIXER_WRITE_RECSRC,
- (unsigned long) &val);
-
-#ifdef AU1000_DEBUG
- sprintf(proc_str, "driver/%s/%d/ac97", AU1000_MODULE_NAME,
- s->codec.id);
- s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL,
- ac97_read_proc, &s->codec);
-#endif
-
-#ifdef CONFIG_MIPS_XXS1500
- /* deassert eapd */
- wrcodec(&s->codec, AC97_POWER_CONTROL,
- rdcodec(&s->codec, AC97_POWER_CONTROL) & ~0x8000);
- /* mute a number of signals which seem to be causing problems
- * if not muted.
- */
- wrcodec(&s->codec, AC97_PCBEEP_VOL, 0x8000);
- wrcodec(&s->codec, AC97_PHONE_VOL, 0x8008);
- wrcodec(&s->codec, AC97_MIC_VOL, 0x8008);
- wrcodec(&s->codec, AC97_LINEIN_VOL, 0x8808);
- wrcodec(&s->codec, AC97_CD_VOL, 0x8808);
- wrcodec(&s->codec, AC97_VIDEO_VOL, 0x8808);
- wrcodec(&s->codec, AC97_AUX_VOL, 0x8808);
- wrcodec(&s->codec, AC97_PCMOUT_VOL, 0x0808);
- wrcodec(&s->codec, AC97_GENERAL_PURPOSE, 0x2000);
-#endif
-
- return 0;
-
- err_dev3:
- unregister_sound_mixer(s->codec.dev_mixer);
- err_dev2:
- unregister_sound_dsp(s->dev_audio);
- err_dev1:
- free_au1000_dma(s->dma_adc.dmanr);
- err_dma2:
- free_au1000_dma(s->dma_dac.dmanr);
- err_dma1:
- release_mem_region(CPHYSADDR(AC97C_CONFIG), 0x14);
- return -1;
-}
-
-static void au1000_remove(void)
-{
- struct au1000_state *s = &au1000_state;
-
- if (!s)
- return;
-#ifdef AU1000_DEBUG
- if (s->ps)
- remove_proc_entry(AU1000_MODULE_NAME, NULL);
-#endif /* AU1000_DEBUG */
- synchronize_irq();
- free_au1000_dma(s->dma_adc.dmanr);
- free_au1000_dma(s->dma_dac.dmanr);
- release_mem_region(CPHYSADDR(AC97C_CONFIG), 0x14);
- unregister_sound_dsp(s->dev_audio);
- unregister_sound_mixer(s->codec.dev_mixer);
-}
-
-static int __init init_au1000(void)
-{
- info("stevel@mvista.com, built " __TIME__ " on " __DATE__);
- return au1000_probe();
-}
-
-static void __exit cleanup_au1000(void)
-{
- info("unloading");
- au1000_remove();
-}
-
-module_init(init_au1000);
-module_exit(cleanup_au1000);
-
-/* --------------------------------------------------------------------- */
-
-#ifndef MODULE
-
-static int __init au1000_setup(char *options)
-{
- char *this_opt;
-
- if (!options || !*options)
- return 0;
-
- while ((this_opt = strsep(&options, ","))) {
- if (!*this_opt)
- continue;
- if (!strncmp(this_opt, "vra", 3)) {
- vra = 1;
- }
- }
-
- return 1;
-}
-
-__setup("au1000_audio=", au1000_setup);
-
-#endif /* MODULE */