/* * 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 #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 #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; countf_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, SA_INTERRUPT, 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, SA_INTERRUPT, 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 */