/* * au1550_ac97.c -- Sound driver for Alchemy Au1550 MIPS Internet Edge * Processor. * * Copyright 2004 Embedded Edge, LLC * dan@embeddededge.com * * Mostly copied from the au1000.c driver and some from the * PowerMac dbdma driver. * We assume the processor can do memory coherent DMA. * * Ported to 2.6 by Matt Porter * * 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. * */ #undef DEBUG #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #undef OSS_DOCUMENTED_MIXER_SEMANTICS /* misc stuff */ #define POLL_COUNT 0x50000 #define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC) /* The number of DBDMA ring descriptors to allocate. No sense making * this too large....if you can't keep up with a few you aren't likely * to be able to with lots of them, either. */ #define NUM_DBDMA_DESCRIPTORS 4 #define err(format, arg...) printk(KERN_ERR format "\n" , ## arg) /* Boot options * 0 = no VRA, 1 = use VRA if codec supports it */ static int vra = 1; module_param(vra, bool, 0); MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it"); static struct au1550_state { /* soundcore stuff */ int dev_audio; 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; fmode_t open_mode; wait_queue_head_t open_wait; struct dmabuf { u32 dmanr; unsigned sample_rate; unsigned src_factor; unsigned sample_size; int num_channels; int dma_bytes_per_sample; int user_bytes_per_sample; int cnt_factor; void *rawbuf; unsigned buforder; unsigned numfrag; unsigned fragshift; void *nextIn; void *nextOut; int count; unsigned total_bytes; unsigned error; wait_queue_head_t wait; /* redundant, but makes calculations easier */ unsigned fragsize; unsigned dma_fragsize; unsigned dmasize; unsigned dma_qcount; /* OSS stuff */ unsigned mapped:1; unsigned ready:1; unsigned stopped:1; unsigned ossfragshift; int ossmaxfrags; unsigned subdivision; } dma_dac, dma_adc; } au1550_state; static 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 au1550_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 au1550_state *s = (struct au1550_state *)codec->private_data; unsigned long flags; u32 cmd, val; u16 data; int i; spin_lock_irqsave(&s->lock, flags); for (i = 0; i < POLL_COUNT; i++) { val = au_readl(PSC_AC97STAT); au_sync(); if (!(val & PSC_AC97STAT_CP)) break; } if (i == POLL_COUNT) err("rdcodec: codec cmd pending expired!"); cmd = (u32)PSC_AC97CDC_INDX(addr); cmd |= PSC_AC97CDC_RD; /* read command */ au_writel(cmd, PSC_AC97CDC); au_sync(); /* now wait for the data */ for (i = 0; i < POLL_COUNT; i++) { val = au_readl(PSC_AC97STAT); au_sync(); if (!(val & PSC_AC97STAT_CP)) break; } if (i == POLL_COUNT) { err("rdcodec: read poll expired!"); data = 0; goto out; } /* wait for command done? */ for (i = 0; i < POLL_COUNT; i++) { val = au_readl(PSC_AC97EVNT); au_sync(); if (val & PSC_AC97EVNT_CD) break; } if (i == POLL_COUNT) { err("rdcodec: read cmdwait expired!"); data = 0; goto out; } data = au_readl(PSC_AC97CDC) & 0xffff; au_sync(); /* Clear command done event. */ au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT); au_sync(); out: spin_unlock_irqrestore(&s->lock, flags); return data; } static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data) { struct au1550_state *s = (struct au1550_state *)codec->private_data; unsigned long flags; u32 cmd, val; int i; spin_lock_irqsave(&s->lock, flags); for (i = 0; i < POLL_COUNT; i++) { val = au_readl(PSC_AC97STAT); au_sync(); if (!(val & PSC_AC97STAT_CP)) break; } if (i == POLL_COUNT) err("wrcodec: codec cmd pending expired!"); cmd = (u32)PSC_AC97CDC_INDX(addr); cmd |= (u32)data; au_writel(cmd, PSC_AC97CDC); au_sync(); for (i = 0; i < POLL_COUNT; i++) { val = au_readl(PSC_AC97STAT); au_sync(); if (!(val & PSC_AC97STAT_CP)) break; } if (i == POLL_COUNT) err("wrcodec: codec cmd pending expired!"); for (i = 0; i < POLL_COUNT; i++) { val = au_readl(PSC_AC97EVNT); au_sync(); if (val & PSC_AC97EVNT_CD) break; } if (i == POLL_COUNT) err("wrcodec: read cmdwait expired!"); /* Clear command done event. */ au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT); au_sync(); spin_unlock_irqrestore(&s->lock, flags); } static void waitcodec(struct ac97_codec *codec) { u16 temp; u32 val; int i; /* codec_wait is used to wait for a ready state after * an AC97C_RESET. */ au1550_delay(10); /* first poll the CODEC_READY tag bit */ for (i = 0; i < POLL_COUNT; i++) { val = au_readl(PSC_AC97STAT); au_sync(); if (val & PSC_AC97STAT_CR) 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); au1550_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 au1550_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); pr_debug("set_adc_rate: set to %d Hz\n", adc_rate); /* 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 au1550_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); pr_debug("set_dac_rate: set to %d Hz\n", dac_rate); /* 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 au1550_state *s) { struct dmabuf *db = &s->dma_dac; u32 stat; unsigned long flags; if (db->stopped) return; spin_lock_irqsave(&s->lock, flags); au_writel(PSC_AC97PCR_TP, PSC_AC97PCR); au_sync(); /* Wait for Transmit Busy to show disabled. */ do { stat = au_readl(PSC_AC97STAT); au_sync(); } while ((stat & PSC_AC97STAT_TB) != 0); au1xxx_dbdma_reset(db->dmanr); db->stopped = 1; spin_unlock_irqrestore(&s->lock, flags); } static void stop_adc(struct au1550_state *s) { struct dmabuf *db = &s->dma_adc; unsigned long flags; u32 stat; if (db->stopped) return; spin_lock_irqsave(&s->lock, flags); au_writel(PSC_AC97PCR_RP, PSC_AC97PCR); au_sync(); /* Wait for Receive Busy to show disabled. */ do { stat = au_readl(PSC_AC97STAT); au_sync(); } while ((stat & PSC_AC97STAT_RB) != 0); au1xxx_dbdma_reset(db->dmanr); db->stopped = 1; spin_unlock_irqrestore(&s->lock, flags); } static void set_xmit_slots(int num_channels) { u32 ac97_config, stat; ac97_config = au_readl(PSC_AC97CFG); au_sync(); ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE); au_writel(ac97_config, PSC_AC97CFG); au_sync(); switch (num_channels) { case 6: /* stereo with surround and center/LFE, * slots 3,4,6,7,8,9 */ ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6); ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9); case 4: /* stereo with surround, slots 3,4,7,8 */ ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7); ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8); case 2: /* stereo, slots 3,4 */ case 1: /* mono */ ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3); ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4); } au_writel(ac97_config, PSC_AC97CFG); au_sync(); ac97_config |= PSC_AC97CFG_DE_ENABLE; au_writel(ac97_config, PSC_AC97CFG); au_sync(); /* Wait for Device ready. */ do { stat = au_readl(PSC_AC97STAT); au_sync(); } while ((stat & PSC_AC97STAT_DR) == 0); } static void set_recv_slots(int num_channels) { u32 ac97_config, stat; ac97_config = au_readl(PSC_AC97CFG); au_sync(); ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE); au_writel(ac97_config, PSC_AC97CFG); au_sync(); /* Always enable slots 3 and 4 (stereo). Slot 6 is * optional Mic ADC, which we don't support yet. */ ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3); ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4); au_writel(ac97_config, PSC_AC97CFG); au_sync(); ac97_config |= PSC_AC97CFG_DE_ENABLE; au_writel(ac97_config, PSC_AC97CFG); au_sync(); /* Wait for Device ready. */ do { stat = au_readl(PSC_AC97STAT); au_sync(); } while ((stat & PSC_AC97STAT_DR) == 0); } /* Hold spinlock for both start_dac() and start_adc() calls */ static void start_dac(struct au1550_state *s) { struct dmabuf *db = &s->dma_dac; if (!db->stopped) return; set_xmit_slots(db->num_channels); au_writel(PSC_AC97PCR_TC, PSC_AC97PCR); au_sync(); au_writel(PSC_AC97PCR_TS, PSC_AC97PCR); au_sync(); au1xxx_dbdma_start(db->dmanr); db->stopped = 0; } static void start_adc(struct au1550_state *s) { struct dmabuf *db = &s->dma_adc; int i; if (!db->stopped) return; /* Put two buffers on the ring to get things started. */ for (i=0; i<2; i++) { au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, db->dma_fragsize, DDMA_FLAGS_IE); db->nextIn += db->dma_fragsize; if (db->nextIn >= db->rawbuf + db->dmasize) db->nextIn -= db->dmasize; } set_recv_slots(db->num_channels); au1xxx_dbdma_start(db->dmanr); au_writel(PSC_AC97PCR_RC, PSC_AC97PCR); au_sync(); au_writel(PSC_AC97PCR_RS, PSC_AC97PCR); au_sync(); db->stopped = 0; } static int prog_dmabuf(struct au1550_state *s, struct dmabuf *db) { unsigned user_bytes_per_sec; unsigned bufs; unsigned rate = db->sample_rate; if (!db->rawbuf) { db->ready = db->mapped = 0; db->buforder = 5; /* 32 * PAGE_SIZE */ db->rawbuf = kmalloc((PAGE_SIZE << db->buforder), GFP_KERNEL); if (!db->rawbuf) return -ENOMEM; } 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->dma_qcount = 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); pr_debug("prog_dmabuf: rate=%d, samplesize=%d, channels=%d\n", rate, db->sample_size, db->num_channels); pr_debug("prog_dmabuf: fragsize=%d, cnt_factor=%d, dma_fragsize=%d\n", db->fragsize, db->cnt_factor, db->dma_fragsize); pr_debug("prog_dmabuf: numfrag=%d, dmasize=%d\n", db->numfrag, db->dmasize); db->ready = 1; return 0; } static int prog_dmabuf_adc(struct au1550_state *s) { stop_adc(s); return prog_dmabuf(s, &s->dma_adc); } static int prog_dmabuf_dac(struct au1550_state *s) { stop_dac(s); return prog_dmabuf(s, &s->dma_dac); } static void dac_dma_interrupt(int irq, void *dev_id) { struct au1550_state *s = (struct au1550_state *) dev_id; struct dmabuf *db = &s->dma_dac; u32 ac97c_stat; spin_lock(&s->lock); ac97c_stat = au_readl(PSC_AC97STAT); if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE)) pr_debug("AC97C status = 0x%08x\n", ac97c_stat); db->dma_qcount--; if (db->count >= db->fragsize) { if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut, db->fragsize, DDMA_FLAGS_IE) == 0) { err("qcount < 2 and no ring room!"); } db->nextOut += db->fragsize; if (db->nextOut >= db->rawbuf + db->dmasize) db->nextOut -= db->dmasize; db->count -= db->fragsize; db->total_bytes += db->dma_fragsize; db->dma_qcount++; } /* wake up anybody listening */ if (waitqueue_active(&db->wait)) wake_up(&db->wait); spin_unlock(&s->lock); } static void adc_dma_interrupt(int irq, void *dev_id) { struct au1550_state *s = (struct au1550_state *)dev_id; struct dmabuf *dp = &s->dma_adc; u32 obytes; char *obuf; spin_lock(&s->lock); /* Pull the buffer from the dma queue. */ au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes); if ((dp->count + obytes) > dp->dmasize) { /* Overrun. Stop ADC and log the error */ spin_unlock(&s->lock); stop_adc(s); dp->error++; err("adc overrun"); return; } /* Put a new empty buffer on the destination DMA. */ au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize, DDMA_FLAGS_IE); dp->nextIn += dp->dma_fragsize; if (dp->nextIn >= dp->rawbuf + dp->dmasize) dp->nextIn -= dp->dmasize; dp->count += obytes; dp->total_bytes += obytes; /* wake up anybody listening */ if (waitqueue_active(&dp->wait)) wake_up(&dp->wait); spin_unlock(&s->lock); } static loff_t au1550_llseek(struct file *file, loff_t offset, int origin) { return -ESPIPE; } static int au1550_open_mixdev(struct inode *inode, struct file *file) { file->private_data = &au1550_state; return 0; } static int au1550_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 au1550_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct au1550_state *s = (struct au1550_state *)file->private_data; struct ac97_codec *codec = s->codec; return mixdev_ioctl(codec, cmd, arg); } static /*const */ struct file_operations au1550_mixer_fops = { owner:THIS_MODULE, llseek:au1550_llseek, ioctl:au1550_ioctl_mixdev, open:au1550_open_mixdev, release:au1550_release_mixdev, }; static int drain_dac(struct au1550_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 <= s->dma_dac.fragsize) 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; au1550_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)) { 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)) { 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 au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos) { struct au1550_state *s = (struct au1550_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 { spin_lock_irqsave(&s->lock, flags); if (db->stopped) start_adc(s); 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 au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos) { struct au1550_state *s = (struct au1550_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; pr_debug("write: count=%d\n", count); 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; /* If the data is available, we want to keep two buffers * on the dma queue. If the queue count reaches zero, * we know the dma has stopped. */ while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) { if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut, db->fragsize, DDMA_FLAGS_IE) == 0) { err("qcount < 2 and no ring room!"); } db->nextOut += db->fragsize; if (db->nextOut >= db->rawbuf + db->dmasize) db->nextOut -= db->dmasize; db->total_bytes += db->dma_fragsize; if (db->dma_qcount == 0) start_dac(s); db->dma_qcount++; } 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; } /* No kernel lock - we have our own spinlock */ static unsigned int au1550_poll(struct file *file, struct poll_table_struct *wait) { struct au1550_state *s = (struct au1550_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 au1550_mmap(struct file *file, struct vm_area_struct *vma) { struct au1550_state *s = (struct au1550_state *)file->private_data; struct dmabuf *db; unsigned long size; int ret = 0; 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, page_to_pfn(virt_to_page(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 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 static int dma_count_done(struct dmabuf *db) { if (db->stopped) return 0; return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr); } static int au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct au1550_state *s = (struct au1550_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 DEBUG for (count = 0; count < ARRAY_SIZE(ioctl_str); count++) { if (ioctl_str[count].cmd == cmd) break; } if (count < ARRAY_SIZE(ioctl_str)) pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg); else pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", 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) { spin_lock_irqsave(&s->lock, flags); start_adc(s); spin_unlock_irqrestore(&s->lock, flags); } else stop_adc(s); } if (file->f_mode & FMODE_WRITE) { if (val & PCM_ENABLE_OUTPUT) { spin_lock_irqsave(&s->lock, flags); start_dac(s); spin_unlock_irqrestore(&s->lock, flags); } 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; pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments); 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: spin_lock(&file->f_lock); file->f_flags |= O_NONBLOCK; spin_unlock(&file->f_lock); 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 - virt_to_phys(s->dma_adc.rawbuf); } else cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) - virt_to_phys(s->dma_adc.rawbuf); 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)); 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 - virt_to_phys(s->dma_dac.rawbuf); } else cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) - virt_to_phys(s->dma_dac.rawbuf); 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)); 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 au1550_open(struct inode *inode, struct file *file) { int minor = MINOR(inode->i_rdev); DECLARE_WAITQUEUE(wait, current); struct au1550_state *s = &au1550_state; int ret; #ifdef DEBUG if (file->f_flags & O_NONBLOCK) pr_debug("open: non-blocking\n"); else pr_debug("open: blocking\n"); #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 0; } static int au1550_release(struct inode *inode, struct file *file) { struct au1550_state *s = (struct au1550_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); kfree(s->dma_dac.rawbuf); s->dma_dac.rawbuf = NULL; } if (file->f_mode & FMODE_READ) { stop_adc(s); kfree(s->dma_adc.rawbuf); s->dma_adc.rawbuf = NULL; } 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 au1550_audio_fops = { owner: THIS_MODULE, llseek: au1550_llseek, read: au1550_read, write: au1550_write, poll: au1550_poll, ioctl: au1550_ioctl, mmap: au1550_mmap, open: au1550_open, release: au1550_release, }; MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com"); MODULE_DESCRIPTION("Au1550 AC97 Audio Driver"); MODULE_LICENSE("GPL"); static int __devinit au1550_probe(void) { struct au1550_state *s = &au1550_state; int val; memset(s, 0, sizeof(struct au1550_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 = ac97_alloc_codec(); if(s->codec == NULL) { err("Out of memory"); return -1; } 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(AC97_PSC_SEL), 0x30, "Au1550 AC97")) { err("AC'97 ports in use"); } /* Allocate the DMA Channels */ if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN, DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) { err("Can't get DAC DMA"); goto err_dma1; } au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16); if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr, NUM_DBDMA_DESCRIPTORS) == 0) { err("Can't get DAC DMA descriptors"); goto err_dma1; } if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN, DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) { err("Can't get ADC DMA"); goto err_dma2; } au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16); if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr, NUM_DBDMA_DESCRIPTORS) == 0) { err("Can't get ADC DMA descriptors"); goto err_dma2; } pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN); /* register devices */ if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0) goto err_dev1; if ((s->codec->dev_mixer = register_sound_mixer(&au1550_mixer_fops, -1)) < 0) goto err_dev2; /* The GPIO for the appropriate PSC was configured by the * board specific start up. * * configure PSC for AC'97 */ au_writel(0, AC97_PSC_CTRL); /* Disable PSC */ au_sync(); au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL); au_sync(); /* cold reset the AC'97 */ au_writel(PSC_AC97RST_RST, PSC_AC97RST); au_sync(); au1550_delay(10); au_writel(0, PSC_AC97RST); au_sync(); /* need to delay around 500msec(bleech) to give some CODECs enough time to wakeup */ au1550_delay(500); /* warm reset the AC'97 to start the bitclk */ au_writel(PSC_AC97RST_SNC, PSC_AC97RST); au_sync(); udelay(100); au_writel(0, PSC_AC97RST); au_sync(); /* Enable PSC */ au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL); au_sync(); /* Wait for PSC ready. */ do { val = au_readl(PSC_AC97STAT); au_sync(); } while ((val & PSC_AC97STAT_SR) == 0); /* Configure AC97 controller. * Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size. */ val = PSC_AC97CFG_SET_LEN(16); val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8; /* Enable device so we can at least * talk over the AC-link. */ au_writel(val, PSC_AC97CFG); au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK); au_sync(); val |= PSC_AC97CFG_DE_ENABLE; au_writel(val, PSC_AC97CFG); au_sync(); /* Wait for Device ready. */ do { val = au_readl(PSC_AC97STAT); au_sync(); } while ((val & PSC_AC97STAT_DR) == 0); /* 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); pr_info("AC'97 Base/Extended ID = %04x/%04x", s->codec_base_caps, s->codec_ext_caps); 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) pr_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); return 0; err_dev3: unregister_sound_mixer(s->codec->dev_mixer); err_dev2: unregister_sound_dsp(s->dev_audio); err_dev1: au1xxx_dbdma_chan_free(s->dma_adc.dmanr); err_dma2: au1xxx_dbdma_chan_free(s->dma_dac.dmanr); err_dma1: release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30); ac97_release_codec(s->codec); return -1; } static void __devinit au1550_remove(void) { struct au1550_state *s = &au1550_state; if (!s) return; synchronize_irq(); au1xxx_dbdma_chan_free(s->dma_adc.dmanr); au1xxx_dbdma_chan_free(s->dma_dac.dmanr); release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30); unregister_sound_dsp(s->dev_audio); unregister_sound_mixer(s->codec->dev_mixer); ac97_release_codec(s->codec); } static int __init init_au1550(void) { return au1550_probe(); } static void __exit cleanup_au1550(void) { au1550_remove(); } module_init(init_au1550); module_exit(cleanup_au1550); #ifndef MODULE static int __init au1550_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("au1550_audio=", au1550_setup); #endif /* MODULE */