/*********************************************************************** * Copyright 2001 MontaVista Software Inc. * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * * drivers/sound/nec_vrc5477.c * AC97 sound dirver for NEC Vrc5477 chip (an integrated, * multi-function controller chip for MIPS CPUs) * * VRA support Copyright 2001 Bradley D. LaRonde * * 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 code is derived from ite8172.c, which is written by Steve Longerbeam. * * Features: * Currently we only support the following capabilities: * . mono output to PCM L/R (line out). * . stereo output to PCM L/R (line out). * . mono input from PCM L (line in). * . stereo output from PCM (line in). * . sampling rate at 48k or variable sampling rate * . support /dev/dsp, /dev/mixer devices, standard OSS devices. * . only support 16-bit PCM format (hardware limit, no software * translation) * . support duplex, but no trigger or realtime. * * Specifically the following are not supported: * . app-set frag size. * . mmap'ed buffer access */ /* * Original comments from ite8172.c file. */ /* * * 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. * 2. The following support is untested: * * Memory mapping the audio buffers, and the ioctl controls that go * with it. * * S/PDIF output. * 3. The following is not supported: * * I2S input. * * legacy audio mode. * 4. Support for volume button interrupts is implemented but doesn't * work yet. * * Revision history * 02.08.2001 0.1 Initial release */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* -------------------debug macros -------------------------------------- */ /* #undef VRC5477_AC97_DEBUG */ #define VRC5477_AC97_DEBUG #undef VRC5477_AC97_VERBOSE_DEBUG /* #define VRC5477_AC97_VERBOSE_DEBUG */ #if defined(VRC5477_AC97_VERBOSE_DEBUG) #define VRC5477_AC97_DEBUG #endif #if defined(VRC5477_AC97_DEBUG) #include #define ASSERT(x) if (!(x)) { \ panic("assertion failed at %s:%d: %s\n", __FILE__, __LINE__, #x); } #else #define ASSERT(x) #endif /* VRC5477_AC97_DEBUG */ #if defined(VRC5477_AC97_VERBOSE_DEBUG) static u16 inTicket=0; /* check sync between intr & write */ static u16 outTicket=0; #endif /* --------------------------------------------------------------------- */ #undef OSS_DOCUMENTED_MIXER_SEMANTICS static const unsigned sample_shift[] = { 0, 1, 1, 2 }; #define VRC5477_INT_CLR 0x0 #define VRC5477_INT_STATUS 0x0 #define VRC5477_CODEC_WR 0x4 #define VRC5477_CODEC_RD 0x8 #define VRC5477_CTRL 0x18 #define VRC5477_ACLINK_CTRL 0x1c #define VRC5477_INT_MASK 0x24 #define VRC5477_DAC1_CTRL 0x30 #define VRC5477_DAC1L 0x34 #define VRC5477_DAC1_BADDR 0x38 #define VRC5477_DAC2_CTRL 0x3c #define VRC5477_DAC2L 0x40 #define VRC5477_DAC2_BADDR 0x44 #define VRC5477_DAC3_CTRL 0x48 #define VRC5477_DAC3L 0x4c #define VRC5477_DAC3_BADDR 0x50 #define VRC5477_ADC1_CTRL 0x54 #define VRC5477_ADC1L 0x58 #define VRC5477_ADC1_BADDR 0x5c #define VRC5477_ADC2_CTRL 0x60 #define VRC5477_ADC2L 0x64 #define VRC5477_ADC2_BADDR 0x68 #define VRC5477_ADC3_CTRL 0x6c #define VRC5477_ADC3L 0x70 #define VRC5477_ADC3_BADDR 0x74 #define VRC5477_CODEC_WR_RWC (1 << 23) #define VRC5477_CODEC_RD_RRDYA (1 << 31) #define VRC5477_CODEC_RD_RRDYD (1 << 30) #define VRC5477_ACLINK_CTRL_RST_ON (1 << 15) #define VRC5477_ACLINK_CTRL_RST_TIME 0x7f #define VRC5477_ACLINK_CTRL_SYNC_ON (1 << 30) #define VRC5477_ACLINK_CTRL_CK_STOP_ON (1 << 31) #define VRC5477_CTRL_DAC2ENB (1 << 15) #define VRC5477_CTRL_ADC2ENB (1 << 14) #define VRC5477_CTRL_DAC1ENB (1 << 13) #define VRC5477_CTRL_ADC1ENB (1 << 12) #define VRC5477_INT_MASK_NMASK (1 << 31) #define VRC5477_INT_MASK_DAC1END (1 << 5) #define VRC5477_INT_MASK_DAC2END (1 << 4) #define VRC5477_INT_MASK_DAC3END (1 << 3) #define VRC5477_INT_MASK_ADC1END (1 << 2) #define VRC5477_INT_MASK_ADC2END (1 << 1) #define VRC5477_INT_MASK_ADC3END (1 << 0) #define VRC5477_DMA_ACTIVATION (1 << 31) #define VRC5477_DMA_WIP (1 << 30) #define VRC5477_AC97_MODULE_NAME "NEC_Vrc5477_audio" #define PFX VRC5477_AC97_MODULE_NAME ": " /* --------------------------------------------------------------------- */ struct vrc5477_ac97_state { /* list of vrc5477_ac97 devices */ struct list_head devs; /* the corresponding pci_dev structure */ struct pci_dev *dev; /* soundcore stuff */ int dev_audio; /* hardware resources */ unsigned long io; unsigned int irq; #ifdef VRC5477_AC97_DEBUG /* debug /proc entry */ struct proc_dir_entry *ps; struct proc_dir_entry *ac97_ps; #endif /* VRC5477_AC97_DEBUG */ struct ac97_codec *codec; unsigned dacChannels, adcChannels; unsigned short dacRate, adcRate; unsigned short extended_status; spinlock_t lock; struct semaphore open_sem; mode_t open_mode; wait_queue_head_t open_wait; struct dmabuf { void *lbuf, *rbuf; dma_addr_t lbufDma, rbufDma; unsigned bufOrder; unsigned numFrag; unsigned fragShift; unsigned fragSize; /* redundant */ unsigned fragTotalSize; /* = numFrag * fragSize(real) */ unsigned nextIn; unsigned nextOut; int count; unsigned error; /* over/underrun */ wait_queue_head_t wait; /* OSS stuff */ unsigned stopped:1; unsigned ready:1; } dma_dac, dma_adc; #define WORK_BUF_SIZE 2048 struct { u16 lchannel; u16 rchannel; } workBuf[WORK_BUF_SIZE/4]; }; /* --------------------------------------------------------------------- */ static LIST_HEAD(devs); /* --------------------------------------------------------------------- */ 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 u16 rdcodec(struct ac97_codec *codec, u8 addr) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)codec->private_data; unsigned long flags; u32 result; spin_lock_irqsave(&s->lock, flags); /* wait until we can access codec registers */ while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000); /* write the address and "read" command to codec */ addr = addr & 0x7f; outl((addr << 16) | VRC5477_CODEC_WR_RWC, s->io + VRC5477_CODEC_WR); /* get the return result */ udelay(100); /* workaround hardware bug */ while ( (result = inl(s->io + VRC5477_CODEC_RD)) & (VRC5477_CODEC_RD_RRDYA | VRC5477_CODEC_RD_RRDYD) ) { /* we get either addr or data, or both */ if (result & VRC5477_CODEC_RD_RRDYA) { ASSERT(addr == ((result >> 16) & 0x7f) ); } if (result & VRC5477_CODEC_RD_RRDYD) { break; } } spin_unlock_irqrestore(&s->lock, flags); return result & 0xffff;; } static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)codec->private_data; unsigned long flags; spin_lock_irqsave(&s->lock, flags); /* wait until we can access codec registers */ while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000); /* write the address and value to codec */ outl((addr << 16) | data, s->io + VRC5477_CODEC_WR); spin_unlock_irqrestore(&s->lock, flags); } static void waitcodec(struct ac97_codec *codec) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)codec->private_data; /* wait until we can access codec registers */ while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000); } static int ac97_codec_not_present(struct ac97_codec *codec) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)codec->private_data; unsigned long flags; unsigned short count = 0xffff; spin_lock_irqsave(&s->lock, flags); /* wait until we can access codec registers */ do { if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000)) break; } while (--count); if (count == 0) { spin_unlock_irqrestore(&s->lock, flags); return -1; } /* write 0 to reset */ outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR); /* test whether we get a response from ac97 chip */ count = 0xffff; do { if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000)) break; } while (--count); if (count == 0) { spin_unlock_irqrestore(&s->lock, flags); return -1; } spin_unlock_irqrestore(&s->lock, flags); return 0; } /* --------------------------------------------------------------------- */ static void vrc5477_ac97_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 void set_adc_rate(struct vrc5477_ac97_state *s, unsigned rate) { wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, rate); s->adcRate = rate; } static void set_dac_rate(struct vrc5477_ac97_state *s, unsigned rate) { if(s->extended_status & AC97_EXTSTAT_VRA) { wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, rate); s->dacRate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE); } } /* --------------------------------------------------------------------- */ static inline void stop_dac(struct vrc5477_ac97_state *s) { struct dmabuf* db = &s->dma_dac; unsigned long flags; u32 temp; spin_lock_irqsave(&s->lock, flags); if (db->stopped) { spin_unlock_irqrestore(&s->lock, flags); return; } /* deactivate the dma */ outl(0, s->io + VRC5477_DAC1_CTRL); outl(0, s->io + VRC5477_DAC2_CTRL); /* wait for DAM completely stop */ while (inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP); while (inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP); /* disable dac slots in aclink */ temp = inl(s->io + VRC5477_CTRL); temp &= ~ (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB); outl (temp, s->io + VRC5477_CTRL); /* disable interrupts */ temp = inl(s->io + VRC5477_INT_MASK); temp &= ~ (VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END); outl (temp, s->io + VRC5477_INT_MASK); /* clear pending ones */ outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END, s->io + VRC5477_INT_CLR); db->stopped = 1; spin_unlock_irqrestore(&s->lock, flags); } static void start_dac(struct vrc5477_ac97_state *s) { struct dmabuf* db = &s->dma_dac; unsigned long flags; u32 dmaLength; u32 temp; spin_lock_irqsave(&s->lock, flags); if (!db->stopped) { spin_unlock_irqrestore(&s->lock, flags); return; } /* we should have some data to do the DMA trasnfer */ ASSERT(db->count >= db->fragSize); /* clear pending fales interrupts */ outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END, s->io + VRC5477_INT_CLR); /* enable interrupts */ temp = inl(s->io + VRC5477_INT_MASK); temp |= VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END; outl(temp, s->io + VRC5477_INT_MASK); /* setup dma base addr */ outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC1_BADDR); if (s->dacChannels == 1) { outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR); } else { outl(db->rbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR); } /* set dma length, in the unit of 0x10 bytes */ dmaLength = db->fragSize >> 4; outl(dmaLength, s->io + VRC5477_DAC1L); outl(dmaLength, s->io + VRC5477_DAC2L); /* activate dma */ outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC1_CTRL); outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC2_CTRL); /* enable dac slots - we should hear the music now! */ temp = inl(s->io + VRC5477_CTRL); temp |= (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB); outl (temp, s->io + VRC5477_CTRL); /* it is time to setup next dma transfer */ ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP); ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP); temp = db->nextOut + db->fragSize; if (temp >= db->fragTotalSize) { ASSERT(temp == db->fragTotalSize); temp = 0; } outl(db->lbufDma + temp, s->io + VRC5477_DAC1_BADDR); if (s->dacChannels == 1) { outl(db->lbufDma + temp, s->io + VRC5477_DAC2_BADDR); } else { outl(db->rbufDma + temp, s->io + VRC5477_DAC2_BADDR); } db->stopped = 0; #if defined(VRC5477_AC97_VERBOSE_DEBUG) outTicket = *(u16*)(db->lbuf+db->nextOut); if (db->count > db->fragSize) { ASSERT((u16)(outTicket+1) == *(u16*)(db->lbuf+temp)); } #endif spin_unlock_irqrestore(&s->lock, flags); } static inline void stop_adc(struct vrc5477_ac97_state *s) { struct dmabuf* db = &s->dma_adc; unsigned long flags; u32 temp; spin_lock_irqsave(&s->lock, flags); if (db->stopped) { spin_unlock_irqrestore(&s->lock, flags); return; } /* deactivate the dma */ outl(0, s->io + VRC5477_ADC1_CTRL); outl(0, s->io + VRC5477_ADC2_CTRL); /* disable adc slots in aclink */ temp = inl(s->io + VRC5477_CTRL); temp &= ~ (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB); outl (temp, s->io + VRC5477_CTRL); /* disable interrupts */ temp = inl(s->io + VRC5477_INT_MASK); temp &= ~ (VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END); outl (temp, s->io + VRC5477_INT_MASK); /* clear pending ones */ outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END, s->io + VRC5477_INT_CLR); db->stopped = 1; spin_unlock_irqrestore(&s->lock, flags); } static void start_adc(struct vrc5477_ac97_state *s) { struct dmabuf* db = &s->dma_adc; unsigned long flags; u32 dmaLength; u32 temp; spin_lock_irqsave(&s->lock, flags); if (!db->stopped) { spin_unlock_irqrestore(&s->lock, flags); return; } /* we should at least have some free space in the buffer */ ASSERT(db->count < db->fragTotalSize - db->fragSize * 2); /* clear pending ones */ outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END, s->io + VRC5477_INT_CLR); /* enable interrupts */ temp = inl(s->io + VRC5477_INT_MASK); temp |= VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END; outl(temp, s->io + VRC5477_INT_MASK); /* setup dma base addr */ outl(db->lbufDma + db->nextIn, s->io + VRC5477_ADC1_BADDR); outl(db->rbufDma + db->nextIn, s->io + VRC5477_ADC2_BADDR); /* setup dma length */ dmaLength = db->fragSize >> 4; outl(dmaLength, s->io + VRC5477_ADC1L); outl(dmaLength, s->io + VRC5477_ADC2L); /* activate dma */ outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC1_CTRL); outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC2_CTRL); /* enable adc slots */ temp = inl(s->io + VRC5477_CTRL); temp |= (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB); outl (temp, s->io + VRC5477_CTRL); /* it is time to setup next dma transfer */ temp = db->nextIn + db->fragSize; if (temp >= db->fragTotalSize) { ASSERT(temp == db->fragTotalSize); temp = 0; } outl(db->lbufDma + temp, s->io + VRC5477_ADC1_BADDR); outl(db->rbufDma + temp, s->io + VRC5477_ADC2_BADDR); db->stopped = 0; spin_unlock_irqrestore(&s->lock, flags); } /* --------------------------------------------------------------------- */ #define DMABUF_DEFAULTORDER (16-PAGE_SHIFT) #define DMABUF_MINORDER 1 static inline void dealloc_dmabuf(struct vrc5477_ac97_state *s, struct dmabuf *db) { if (db->lbuf) { ASSERT(db->rbuf); pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder, db->lbuf, db->lbufDma); pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder, db->rbuf, db->rbufDma); db->lbuf = db->rbuf = NULL; } db->nextIn = db->nextOut = 0; db->ready = 0; } static int prog_dmabuf(struct vrc5477_ac97_state *s, struct dmabuf *db, unsigned rate) { int order; unsigned bufsize; if (!db->lbuf) { ASSERT(!db->rbuf); db->ready = 0; for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER; order--) { db->lbuf = pci_alloc_consistent(s->dev, PAGE_SIZE << order, &db->lbufDma); db->rbuf = pci_alloc_consistent(s->dev, PAGE_SIZE << order, &db->rbufDma); if (db->lbuf && db->rbuf) break; if (db->lbuf) { ASSERT(!db->rbuf); pci_free_consistent(s->dev, PAGE_SIZE << order, db->lbuf, db->lbufDma); } } if (!db->lbuf) { ASSERT(!db->rbuf); return -ENOMEM; } db->bufOrder = order; } db->count = 0; db->nextIn = db->nextOut = 0; bufsize = PAGE_SIZE << db->bufOrder; db->fragShift = ld2(rate * 2 / 100); if (db->fragShift < 4) db->fragShift = 4; db->numFrag = bufsize >> db->fragShift; while (db->numFrag < 4 && db->fragShift > 4) { db->fragShift--; db->numFrag = bufsize >> db->fragShift; } db->fragSize = 1 << db->fragShift; db->fragTotalSize = db->numFrag << db->fragShift; memset(db->lbuf, 0, db->fragTotalSize); memset(db->rbuf, 0, db->fragTotalSize); db->ready = 1; return 0; } static inline int prog_dmabuf_adc(struct vrc5477_ac97_state *s) { stop_adc(s); return prog_dmabuf(s, &s->dma_adc, s->adcRate); } static inline int prog_dmabuf_dac(struct vrc5477_ac97_state *s) { stop_dac(s); return prog_dmabuf(s, &s->dma_dac, s->dacRate); } /* --------------------------------------------------------------------- */ /* hold spinlock for the following! */ static inline void vrc5477_ac97_adc_interrupt(struct vrc5477_ac97_state *s) { struct dmabuf* adc = &s->dma_adc; unsigned temp; /* we need two frags avaiable because one is already being used * and the other will be used when next interrupt happens. */ if (adc->count >= adc->fragTotalSize - adc->fragSize) { stop_adc(s); adc->error++; printk(KERN_INFO PFX "adc overrun\n"); return; } /* set the base addr for next DMA transfer */ temp = adc->nextIn + 2*adc->fragSize; if (temp >= adc->fragTotalSize) { ASSERT( (temp == adc->fragTotalSize) || (temp == adc->fragTotalSize + adc->fragSize) ); temp -= adc->fragTotalSize; } outl(adc->lbufDma + temp, s->io + VRC5477_ADC1_BADDR); outl(adc->rbufDma + temp, s->io + VRC5477_ADC2_BADDR); /* adjust nextIn */ adc->nextIn += adc->fragSize; if (adc->nextIn >= adc->fragTotalSize) { ASSERT(adc->nextIn == adc->fragTotalSize); adc->nextIn = 0; } /* adjust count */ adc->count += adc->fragSize; /* wake up anybody listening */ if (waitqueue_active(&adc->wait)) { wake_up_interruptible(&adc->wait); } } static inline void vrc5477_ac97_dac_interrupt(struct vrc5477_ac97_state *s) { struct dmabuf* dac = &s->dma_dac; unsigned temp; /* next DMA transfer should already started */ // ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP); // ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP); /* let us set for next next DMA transfer */ temp = dac->nextOut + dac->fragSize*2; if (temp >= dac->fragTotalSize) { ASSERT( (temp == dac->fragTotalSize) || (temp == dac->fragTotalSize + dac->fragSize) ); temp -= dac->fragTotalSize; } outl(dac->lbufDma + temp, s->io + VRC5477_DAC1_BADDR); if (s->dacChannels == 1) { outl(dac->lbufDma + temp, s->io + VRC5477_DAC2_BADDR); } else { outl(dac->rbufDma + temp, s->io + VRC5477_DAC2_BADDR); } #if defined(VRC5477_AC97_VERBOSE_DEBUG) if (*(u16*)(dac->lbuf + dac->nextOut) != outTicket) { printk("assert fail: - %d vs %d\n", *(u16*)(dac->lbuf + dac->nextOut), outTicket); ASSERT(1 == 0); } #endif /* adjust nextOut pointer */ dac->nextOut += dac->fragSize; if (dac->nextOut >= dac->fragTotalSize) { ASSERT(dac->nextOut == dac->fragTotalSize); dac->nextOut = 0; } /* adjust count */ dac->count -= dac->fragSize; if (dac->count <=0 ) { /* buffer under run */ dac->count = 0; dac->nextIn = dac->nextOut; stop_dac(s); } #if defined(VRC5477_AC97_VERBOSE_DEBUG) if (dac->count) { outTicket ++; ASSERT(*(u16*)(dac->lbuf + dac->nextOut) == outTicket); } #endif /* we cannot have both under run and someone is waiting on us */ ASSERT(! (waitqueue_active(&dac->wait) && (dac->count <= 0)) ); /* wake up anybody listening */ if (waitqueue_active(&dac->wait)) wake_up_interruptible(&dac->wait); } static void vrc5477_ac97_interrupt(int irq, void *dev_id, struct pt_regs *regs) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)dev_id; u32 irqStatus; u32 adcInterrupts, dacInterrupts; spin_lock(&s->lock); /* get irqStatus and clear the detected ones */ irqStatus = inl(s->io + VRC5477_INT_STATUS); outl(irqStatus, s->io + VRC5477_INT_CLR); /* let us see what we get */ dacInterrupts = VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END; adcInterrupts = VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END; if (irqStatus & dacInterrupts) { /* we should get both interrupts, but just in case ... */ if (irqStatus & VRC5477_INT_MASK_DAC1END) { vrc5477_ac97_dac_interrupt(s); } if ( (irqStatus & dacInterrupts) != dacInterrupts ) { printk(KERN_WARNING "vrc5477_ac97 : dac interrupts not in sync!!!\n"); stop_dac(s); start_dac(s); } } else if (irqStatus & adcInterrupts) { /* we should get both interrupts, but just in case ... */ if(irqStatus & VRC5477_INT_MASK_ADC1END) { vrc5477_ac97_adc_interrupt(s); } if ( (irqStatus & adcInterrupts) != adcInterrupts ) { printk(KERN_WARNING "vrc5477_ac97 : adc interrupts not in sync!!!\n"); stop_adc(s); start_adc(s); } } spin_unlock(&s->lock); } /* --------------------------------------------------------------------- */ static int vrc5477_ac97_open_mixdev(struct inode *inode, struct file *file) { int minor = MINOR(inode->i_rdev); struct list_head *list; struct vrc5477_ac97_state *s; for (list = devs.next; ; list = list->next) { if (list == &devs) return -ENODEV; s = list_entry(list, struct vrc5477_ac97_state, devs); if (s->codec->dev_mixer == minor) break; } file->private_data = s; return 0; } static int vrc5477_ac97_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 vrc5477_ac97_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data; struct ac97_codec *codec = s->codec; return mixdev_ioctl(codec, cmd, arg); } static /*const*/ struct file_operations vrc5477_ac97_mixer_fops = { owner: THIS_MODULE, llseek: no_llseek, ioctl: vrc5477_ac97_ioctl_mixdev, open: vrc5477_ac97_open_mixdev, release: vrc5477_ac97_release_mixdev, }; /* --------------------------------------------------------------------- */ static int drain_dac(struct vrc5477_ac97_state *s, int nonblock) { unsigned long flags; int count, tmo; if (!s->dma_dac.ready) 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->dacRate / 2; vrc5477_ac97_delay(tmo); } if (signal_pending(current)) return -ERESTARTSYS; return 0; } /* --------------------------------------------------------------------- */ static int inline copy_two_channel_adc_to_user(struct vrc5477_ac97_state *s, char *buffer, int copyCount) { struct dmabuf *db = &s->dma_adc; int bufStart = db->nextOut; for (; copyCount > 0; ) { int i; int count = copyCount; if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2; for (i=0; i< count/2; i++) { s->workBuf[i].lchannel = *(u16*)(db->lbuf + bufStart + i*2); s->workBuf[i].rchannel = *(u16*)(db->rbuf + bufStart + i*2); } if (copy_to_user(buffer, s->workBuf, count*2)) { return -1; } copyCount -= count; bufStart += count; ASSERT(bufStart <= db->fragTotalSize); buffer += count *2; } return 0; } /* return the total bytes that is copied */ static int inline copy_adc_to_user(struct vrc5477_ac97_state *s, char * buffer, size_t count, int avail) { struct dmabuf *db = &s->dma_adc; int copyCount=0; int copyFragCount=0; int totalCopyCount = 0; int totalCopyFragCount = 0; unsigned long flags; /* adjust count to signel channel byte count */ count >>= s->adcChannels - 1; /* we may have to "copy" twice as ring buffer wraps around */ for (; (avail > 0) && (count > 0); ) { /* determine max possible copy count for single channel */ copyCount = count; if (copyCount > avail) { copyCount = avail; } if (copyCount + db->nextOut > db->fragTotalSize) { copyCount = db->fragTotalSize - db->nextOut; ASSERT((copyCount % db->fragSize) == 0); } copyFragCount = (copyCount-1) >> db->fragShift; copyFragCount = (copyFragCount+1) << db->fragShift; ASSERT(copyFragCount >= copyCount); /* we copy differently based on adc channels */ if (s->adcChannels == 1) { if (copy_to_user(buffer, db->lbuf + db->nextOut, copyCount)) return -1; } else { /* *sigh* we have to mix two streams into one */ if (copy_two_channel_adc_to_user(s, buffer, copyCount)) return -1; } count -= copyCount; totalCopyCount += copyCount; avail -= copyFragCount; totalCopyFragCount += copyFragCount; buffer += copyCount << (s->adcChannels-1); db->nextOut += copyFragCount; if (db->nextOut >= db->fragTotalSize) { ASSERT(db->nextOut == db->fragTotalSize); db->nextOut = 0; } ASSERT((copyFragCount % db->fragSize) == 0); ASSERT( (count == 0) || (copyCount == copyFragCount)); } spin_lock_irqsave(&s->lock, flags); db->count -= totalCopyFragCount; spin_unlock_irqrestore(&s->lock, flags); return totalCopyCount << (s->adcChannels-1); } static ssize_t vrc5477_ac97_read(struct file *file, char *buffer, size_t count, loff_t *ppos) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data; struct dmabuf *db = &s->dma_adc; ssize_t ret = 0; unsigned long flags; int copyCount; size_t avail; if (ppos != &file->f_pos) return -ESPIPE; if (!access_ok(VERIFY_WRITE, buffer, count)) return -EFAULT; ASSERT(db->ready); while (count > 0) { // wait for samples in capture buffer do { spin_lock_irqsave(&s->lock, flags); if (db->stopped) start_adc(s); avail = db->count; spin_unlock_irqrestore(&s->lock, flags); if (avail <= 0) { if (file->f_flags & O_NONBLOCK) { if (!ret) ret = -EAGAIN; return ret; } interruptible_sleep_on(&db->wait); if (signal_pending(current)) { if (!ret) ret = -ERESTARTSYS; return ret; } } } while (avail <= 0); ASSERT( (avail % db->fragSize) == 0); copyCount = copy_adc_to_user(s, buffer, count, avail); if (copyCount <=0 ) { if (!ret) ret = -EFAULT; return ret; } count -= copyCount; buffer += copyCount; ret += copyCount; } // while (count > 0) return ret; } static int inline copy_two_channel_dac_from_user(struct vrc5477_ac97_state *s, const char *buffer, int copyCount) { struct dmabuf *db = &s->dma_dac; int bufStart = db->nextIn; ASSERT(db->ready); for (; copyCount > 0; ) { int i; int count = copyCount; if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2; if (copy_from_user(s->workBuf, buffer, count*2)) { return -1; } for (i=0; i< count/2; i++) { *(u16*)(db->lbuf + bufStart + i*2) = s->workBuf[i].lchannel; *(u16*)(db->rbuf + bufStart + i*2) = s->workBuf[i].rchannel; } copyCount -= count; bufStart += count; ASSERT(bufStart <= db->fragTotalSize); buffer += count *2; } return 0; } /* return the total bytes that is copied */ static int inline copy_dac_from_user(struct vrc5477_ac97_state *s, const char *buffer, size_t count, int avail) { struct dmabuf *db = &s->dma_dac; int copyCount=0; int copyFragCount=0; int totalCopyCount = 0; int totalCopyFragCount = 0; unsigned long flags; #if defined(VRC5477_AC97_VERBOSE_DEBUG) int i; #endif /* adjust count to signel channel byte count */ count >>= s->dacChannels - 1; /* we may have to "copy" twice as ring buffer wraps around */ for (; (avail > 0) && (count > 0); ) { /* determine max possible copy count for single channel */ copyCount = count; if (copyCount > avail) { copyCount = avail; } if (copyCount + db->nextIn > db->fragTotalSize) { copyCount = db->fragTotalSize - db->nextIn; ASSERT(copyCount > 0); } copyFragCount = copyCount; ASSERT(copyFragCount >= copyCount); /* we copy differently based on the number channels */ if (s->dacChannels == 1) { if (copy_from_user(db->lbuf + db->nextIn, buffer, copyCount)) return -1; /* fill gaps with 0 */ memset(db->lbuf + db->nextIn + copyCount, 0, copyFragCount - copyCount); } else { /* we have demux the stream into two separate ones */ if (copy_two_channel_dac_from_user(s, buffer, copyCount)) return -1; /* fill gaps with 0 */ memset(db->lbuf + db->nextIn + copyCount, 0, copyFragCount - copyCount); memset(db->rbuf + db->nextIn + copyCount, 0, copyFragCount - copyCount); } #if defined(VRC5477_AC97_VERBOSE_DEBUG) for (i=0; i< copyFragCount; i+= db->fragSize) { *(u16*)(db->lbuf + db->nextIn + i) = inTicket ++; } #endif count -= copyCount; totalCopyCount += copyCount; avail -= copyFragCount; totalCopyFragCount += copyFragCount; buffer += copyCount << (s->dacChannels - 1); db->nextIn += copyFragCount; if (db->nextIn >= db->fragTotalSize) { ASSERT(db->nextIn == db->fragTotalSize); db->nextIn = 0; } ASSERT( (count == 0) || (copyCount == copyFragCount)); } spin_lock_irqsave(&s->lock, flags); db->count += totalCopyFragCount; if (db->stopped) { start_dac(s); } /* nextIn should not be equal to nextOut unless we are full */ ASSERT( ( (db->count == db->fragTotalSize) && (db->nextIn == db->nextOut) ) || ( (db->count < db->fragTotalSize) && (db->nextIn != db->nextOut) ) ); spin_unlock_irqrestore(&s->lock, flags); return totalCopyCount << (s->dacChannels-1); } static ssize_t vrc5477_ac97_write(struct file *file, const char *buffer, size_t count, loff_t *ppos) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data; struct dmabuf *db = &s->dma_dac; ssize_t ret; unsigned long flags; int copyCount, avail; if (ppos != &file->f_pos) return -ESPIPE; if (!access_ok(VERIFY_READ, buffer, count)) return -EFAULT; ret = 0; while (count > 0) { // wait for space in playback buffer do { spin_lock_irqsave(&s->lock, flags); avail = db->fragTotalSize - db->count; spin_unlock_irqrestore(&s->lock, flags); if (avail <= 0) { if (file->f_flags & O_NONBLOCK) { if (!ret) ret = -EAGAIN; return ret; } interruptible_sleep_on(&db->wait); if (signal_pending(current)) { if (!ret) ret = -ERESTARTSYS; return ret; } } } while (avail <= 0); copyCount = copy_dac_from_user(s, buffer, count, avail); if (copyCount < 0) { if (!ret) ret = -EFAULT; return ret; } count -= copyCount; buffer += copyCount; ret += copyCount; } // while (count > 0) return ret; } /* No kernel lock - we have our own spinlock */ static unsigned int vrc5477_ac97_poll(struct file *file, struct poll_table_struct *wait) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data; unsigned long flags; unsigned int mask = 0; if (file->f_mode & FMODE_WRITE) poll_wait(file, &s->dma_dac.wait, wait); if (file->f_mode & FMODE_READ) 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.fragSize) mask |= POLLIN | POLLRDNORM; } if (file->f_mode & FMODE_WRITE) { if ((signed)s->dma_dac.fragTotalSize >= s->dma_dac.count + (signed)s->dma_dac.fragSize) mask |= POLLOUT | POLLWRNORM; } spin_unlock_irqrestore(&s->lock, flags); return mask; } #ifdef VRC5477_AC97_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_SETFMT, "SNDCTL_DSP_SETFMT"}, {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_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 vrc5477_ac97_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data; unsigned long flags; audio_buf_info abinfo; int count; int val, ret; #ifdef VRC5477_AC97_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, (int *)arg); case SNDCTL_DSP_RESET: if (file->f_mode & FMODE_WRITE) { stop_dac(s); synchronize_irq(); s->dma_dac.count = 0; s->dma_dac.nextIn = s->dma_dac.nextOut = 0; } if (file->f_mode & FMODE_READ) { stop_adc(s); synchronize_irq(); s->dma_adc.count = 0; s->dma_adc.nextIn = s->dma_adc.nextOut = 0; } 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 ((ret = prog_dmabuf_adc(s))) return ret; } if (file->f_mode & FMODE_WRITE) { stop_dac(s); set_dac_rate(s, val); if ((ret = prog_dmabuf_dac(s))) return ret; } } return put_user((file->f_mode & FMODE_READ) ? s->adcRate : s->dacRate, (int *)arg); case SNDCTL_DSP_STEREO: if (get_user(val, (int *)arg)) return -EFAULT; if (file->f_mode & FMODE_READ) { stop_adc(s); if (val) s->adcChannels = 2; else s->adcChannels = 1; if ((ret = prog_dmabuf_adc(s))) return ret; } if (file->f_mode & FMODE_WRITE) { stop_dac(s); if (val) s->dacChannels = 2; else s->dacChannels = 1; 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 ( (val != 1) && (val != 2)) val = 2; if (file->f_mode & FMODE_READ) { stop_adc(s); s->dacChannels = val; if ((ret = prog_dmabuf_adc(s))) return ret; } if (file->f_mode & FMODE_WRITE) { stop_dac(s); s->dacChannels = 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, (int *)arg); case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/ if (get_user(val, (int *)arg)) return -EFAULT; if (val != AFMT_QUERY) { if (val != AFMT_S16_LE) return -EINVAL; if (file->f_mode & FMODE_READ) { stop_adc(s); if ((ret = prog_dmabuf_adc(s))) return ret; } if (file->f_mode & FMODE_WRITE) { stop_dac(s); if ((ret = prog_dmabuf_dac(s))) return ret; } } else { val = AFMT_S16_LE; } return put_user(val, (int *)arg); case SNDCTL_DSP_POST: return 0; case SNDCTL_DSP_GETTRIGGER: case SNDCTL_DSP_SETTRIGGER: /* NO trigger */ return -EINVAL; case SNDCTL_DSP_GETOSPACE: if (!(file->f_mode & FMODE_WRITE)) return -EINVAL; abinfo.fragsize = s->dma_dac.fragSize << (s->dacChannels-1); spin_lock_irqsave(&s->lock, flags); count = s->dma_dac.count; spin_unlock_irqrestore(&s->lock, flags); abinfo.bytes = (s->dma_dac.fragTotalSize - count) << (s->dacChannels-1); abinfo.fragstotal = s->dma_dac.numFrag; abinfo.fragments = abinfo.bytes >> s->dma_dac.fragShift >> (s->dacChannels-1); 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 << (s->adcChannels-1); spin_lock_irqsave(&s->lock, flags); count = s->dma_adc.count; spin_unlock_irqrestore(&s->lock, flags); if (count < 0) count = 0; abinfo.bytes = count << (s->adcChannels-1); abinfo.fragstotal = s->dma_adc.numFrag; abinfo.fragments = (abinfo.bytes >> s->dma_adc.fragShift) >> (s->adcChannels-1); 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; spin_unlock_irqrestore(&s->lock, flags); return put_user(count, (int *)arg); case SNDCTL_DSP_GETIPTR: case SNDCTL_DSP_GETOPTR: /* we cannot get DMA ptr */ return -EINVAL; case SNDCTL_DSP_GETBLKSIZE: if (file->f_mode & FMODE_WRITE) return put_user(s->dma_dac.fragSize << (s->dacChannels-1), (int *)arg); else return put_user(s->dma_adc.fragSize << (s->adcChannels-1), (int *)arg); case SNDCTL_DSP_SETFRAGMENT: /* we ignore fragment size request */ return 0; case SNDCTL_DSP_SUBDIVIDE: /* what is this for? [jsun] */ return 0; case SOUND_PCM_READ_RATE: return put_user((file->f_mode & FMODE_READ) ? s->adcRate : s->dacRate, (int *)arg); case SOUND_PCM_READ_CHANNELS: if (file->f_mode & FMODE_READ) return put_user(s->adcChannels, (int *)arg); else return put_user(s->dacChannels ? 2 : 1, (int *)arg); case SOUND_PCM_READ_BITS: return put_user(16, (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 vrc5477_ac97_open(struct inode *inode, struct file *file) { int minor = MINOR(inode->i_rdev); DECLARE_WAITQUEUE(wait, current); unsigned long flags; struct list_head *list; struct vrc5477_ac97_state *s; int ret=0; for (list = devs.next; ; list = list->next) { if (list == &devs) return -ENODEV; s = list_entry(list, struct vrc5477_ac97_state, devs); if (!((s->dev_audio ^ minor) & ~0xf)) break; } file->private_data = s; /* wait for device to become free */ down(&s->open_sem); while (s->open_mode & file->f_mode) { if (file->f_flags & O_NONBLOCK) { up(&s->open_sem); return -EBUSY; } add_wait_queue(&s->open_wait, &wait); __set_current_state(TASK_INTERRUPTIBLE); up(&s->open_sem); schedule(); remove_wait_queue(&s->open_wait, &wait); set_current_state(TASK_RUNNING); if (signal_pending(current)) return -ERESTARTSYS; down(&s->open_sem); } spin_lock_irqsave(&s->lock, flags); if (file->f_mode & FMODE_READ) { /* set default settings */ set_adc_rate(s, 48000); s->adcChannels = 2; ret = prog_dmabuf_adc(s); if (ret) goto bailout; } if (file->f_mode & FMODE_WRITE) { /* set default settings */ set_dac_rate(s, 48000); s->dacChannels = 2; ret = prog_dmabuf_dac(s); if (ret) goto bailout; } s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE); bailout: spin_unlock_irqrestore(&s->lock, flags); up(&s->open_sem); return ret; } static int vrc5477_ac97_release(struct inode *inode, struct file *file) { struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data; lock_kernel(); if (file->f_mode & FMODE_WRITE) drain_dac(s, file->f_flags & O_NONBLOCK); down(&s->open_sem); 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); up(&s->open_sem); wake_up(&s->open_wait); unlock_kernel(); return 0; } static /*const*/ struct file_operations vrc5477_ac97_audio_fops = { owner: THIS_MODULE, llseek: no_llseek, read: vrc5477_ac97_read, write: vrc5477_ac97_write, poll: vrc5477_ac97_poll, ioctl: vrc5477_ac97_ioctl, // mmap: vrc5477_ac97_mmap, open: vrc5477_ac97_open, release: vrc5477_ac97_release, }; /* --------------------------------------------------------------------- */ /* --------------------------------------------------------------------- */ /* * for debugging purposes, we'll create a proc device that dumps the * CODEC chipstate */ #ifdef VRC5477_AC97_DEBUG struct { const char *regname; unsigned regaddr; } vrc5477_ac97_regs[] = { {"VRC5477_INT_STATUS", VRC5477_INT_STATUS}, {"VRC5477_CODEC_WR", VRC5477_CODEC_WR}, {"VRC5477_CODEC_RD", VRC5477_CODEC_RD}, {"VRC5477_CTRL", VRC5477_CTRL}, {"VRC5477_ACLINK_CTRL", VRC5477_ACLINK_CTRL}, {"VRC5477_INT_MASK", VRC5477_INT_MASK}, {"VRC5477_DAC1_CTRL", VRC5477_DAC1_CTRL}, {"VRC5477_DAC1L", VRC5477_DAC1L}, {"VRC5477_DAC1_BADDR", VRC5477_DAC1_BADDR}, {"VRC5477_DAC2_CTRL", VRC5477_DAC2_CTRL}, {"VRC5477_DAC2L", VRC5477_DAC2L}, {"VRC5477_DAC2_BADDR", VRC5477_DAC2_BADDR}, {"VRC5477_DAC3_CTRL", VRC5477_DAC3_CTRL}, {"VRC5477_DAC3L", VRC5477_DAC3L}, {"VRC5477_DAC3_BADDR", VRC5477_DAC3_BADDR}, {"VRC5477_ADC1_CTRL", VRC5477_ADC1_CTRL}, {"VRC5477_ADC1L", VRC5477_ADC1L}, {"VRC5477_ADC1_BADDR", VRC5477_ADC1_BADDR}, {"VRC5477_ADC2_CTRL", VRC5477_ADC2_CTRL}, {"VRC5477_ADC2L", VRC5477_ADC2L}, {"VRC5477_ADC2_BADDR", VRC5477_ADC2_BADDR}, {"VRC5477_ADC3_CTRL", VRC5477_ADC3_CTRL}, {"VRC5477_ADC3L", VRC5477_ADC3L}, {"VRC5477_ADC3_BADDR", VRC5477_ADC3_BADDR}, {NULL, 0x0} }; static int proc_vrc5477_ac97_dump (char *buf, char **start, off_t fpos, int length, int *eof, void *data) { struct vrc5477_ac97_state *s; int cnt, len = 0; if (list_empty(&devs)) return 0; s = list_entry(devs.next, struct vrc5477_ac97_state, devs); /* print out header */ len += sprintf(buf + len, "\n\t\tVrc5477 Audio Debug\n\n"); // print out digital controller state len += sprintf (buf + len, "NEC Vrc5477 Audio Controller registers\n"); len += sprintf (buf + len, "---------------------------------\n"); for (cnt=0; vrc5477_ac97_regs[cnt].regname != NULL; cnt++) { len+= sprintf (buf + len, "%-20s = %08x\n", vrc5477_ac97_regs[cnt].regname, inl(s->io + vrc5477_ac97_regs[cnt].regaddr)); } /* print out driver state */ len += sprintf (buf + len, "NEC Vrc5477 Audio driver states\n"); len += sprintf (buf + len, "---------------------------------\n"); len += sprintf (buf + len, "dacChannels = %d\n", s->dacChannels); len += sprintf (buf + len, "adcChannels = %d\n", s->adcChannels); len += sprintf (buf + len, "dacRate = %d\n", s->dacRate); len += sprintf (buf + len, "adcRate = %d\n", s->adcRate); len += sprintf (buf + len, "dma_dac is %s ready\n", s->dma_dac.ready? "" : "not"); if (s->dma_dac.ready) { len += sprintf (buf + len, "dma_dac is %s stopped.\n", s->dma_dac.stopped? "" : "not"); len += sprintf (buf + len, "dma_dac.fragSize = %x\n", s->dma_dac.fragSize); len += sprintf (buf + len, "dma_dac.fragShift = %x\n", s->dma_dac.fragShift); len += sprintf (buf + len, "dma_dac.numFrag = %x\n", s->dma_dac.numFrag); len += sprintf (buf + len, "dma_dac.fragTotalSize = %x\n", s->dma_dac.fragTotalSize); len += sprintf (buf + len, "dma_dac.nextIn = %x\n", s->dma_dac.nextIn); len += sprintf (buf + len, "dma_dac.nextOut = %x\n", s->dma_dac.nextOut); len += sprintf (buf + len, "dma_dac.count = %x\n", s->dma_dac.count); } len += sprintf (buf + len, "dma_adc is %s ready\n", s->dma_adc.ready? "" : "not"); if (s->dma_adc.ready) { len += sprintf (buf + len, "dma_adc is %s stopped.\n", s->dma_adc.stopped? "" : "not"); len += sprintf (buf + len, "dma_adc.fragSize = %x\n", s->dma_adc.fragSize); len += sprintf (buf + len, "dma_adc.fragShift = %x\n", s->dma_adc.fragShift); len += sprintf (buf + len, "dma_adc.numFrag = %x\n", s->dma_adc.numFrag); len += sprintf (buf + len, "dma_adc.fragTotalSize = %x\n", s->dma_adc.fragTotalSize); len += sprintf (buf + len, "dma_adc.nextIn = %x\n", s->dma_adc.nextIn); len += sprintf (buf + len, "dma_adc.nextOut = %x\n", s->dma_adc.nextOut); len += sprintf (buf + len, "dma_adc.count = %x\n", s->dma_adc.count); } /* print out CODEC state */ len += sprintf (buf + len, "\nAC97 CODEC registers\n"); len += sprintf (buf + len, "----------------------\n"); for (cnt=0; cnt <= 0x7e; cnt = 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 /* VRC5477_AC97_DEBUG */ /* --------------------------------------------------------------------- */ /* maximum number of devices; only used for command line params */ #define NR_DEVICE 5 static unsigned int devindex = 0; MODULE_AUTHOR("Monta Vista Software, jsun@mvista.com or jsun@junsun.net"); MODULE_DESCRIPTION("NEC Vrc5477 audio (AC97) Driver"); MODULE_LICENSE("GPL"); static int __devinit vrc5477_ac97_probe(struct pci_dev *pcidev, const struct pci_device_id *pciid) { struct vrc5477_ac97_state *s; #ifdef VRC5477_AC97_DEBUG char proc_str[80]; #endif if (pcidev->irq == 0) return -1; if (!(s = kmalloc(sizeof(struct vrc5477_ac97_state), GFP_KERNEL))) { printk(KERN_ERR PFX "alloc of device struct failed\n"); return -1; } memset(s, 0, sizeof(struct vrc5477_ac97_state)); init_waitqueue_head(&s->dma_adc.wait); init_waitqueue_head(&s->dma_dac.wait); init_waitqueue_head(&s->open_wait); init_MUTEX(&s->open_sem); spin_lock_init(&s->lock); s->dev = pcidev; s->io = pci_resource_start(pcidev, 0); s->irq = pcidev->irq; s->codec = ac97_alloc_codec(); s->codec->private_data = s; s->codec->id = 0; s->codec->codec_read = rdcodec; s->codec->codec_write = wrcodec; s->codec->codec_wait = waitcodec; /* setting some other default values such as * adcChannels, adcRate is done in open() so that * no persistent state across file opens. */ /* test if get response from ac97, if not return */ if (ac97_codec_not_present(s->codec)) { printk(KERN_ERR PFX "no ac97 codec\n"); goto err_region; } if (!request_region(s->io, pci_resource_len(pcidev,0), VRC5477_AC97_MODULE_NAME)) { printk(KERN_ERR PFX "io ports %#lx->%#lx in use\n", s->io, s->io + pci_resource_len(pcidev,0)-1); goto err_region; } if (request_irq(s->irq, vrc5477_ac97_interrupt, SA_INTERRUPT, VRC5477_AC97_MODULE_NAME, s)) { printk(KERN_ERR PFX "irq %u in use\n", s->irq); goto err_irq; } printk(KERN_INFO PFX "IO at %#lx, IRQ %d\n", s->io, s->irq); /* register devices */ if ((s->dev_audio = register_sound_dsp(&vrc5477_ac97_audio_fops, -1)) < 0) goto err_dev1; if ((s->codec->dev_mixer = register_sound_mixer(&vrc5477_ac97_mixer_fops, -1)) < 0) goto err_dev2; #ifdef VRC5477_AC97_DEBUG /* intialize the debug proc device */ s->ps = create_proc_read_entry(VRC5477_AC97_MODULE_NAME, 0, NULL, proc_vrc5477_ac97_dump, NULL); #endif /* VRC5477_AC97_DEBUG */ /* enable pci io and bus mastering */ if (pci_enable_device(pcidev)) goto err_dev3; pci_set_master(pcidev); /* cold reset the AC97 */ outl(VRC5477_ACLINK_CTRL_RST_ON | VRC5477_ACLINK_CTRL_RST_TIME, s->io + VRC5477_ACLINK_CTRL); while (inl(s->io + VRC5477_ACLINK_CTRL) & VRC5477_ACLINK_CTRL_RST_ON); /* codec init */ if (!ac97_probe_codec(s->codec)) goto err_dev3; #ifdef VRC5477_AC97_DEBUG sprintf(proc_str, "driver/%s/%d/ac97", VRC5477_AC97_MODULE_NAME, s->codec->id); s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL, ac97_read_proc, s->codec); /* TODO : why this proc file does not show up? */ #endif /* Try to enable variable rate audio mode. */ wrcodec(s->codec, AC97_EXTENDED_STATUS, rdcodec(s->codec, AC97_EXTENDED_STATUS) | AC97_EXTSTAT_VRA); /* Did we enable it? */ if(rdcodec(s->codec, AC97_EXTENDED_STATUS) & AC97_EXTSTAT_VRA) s->extended_status |= AC97_EXTSTAT_VRA; else { s->dacRate = 48000; printk(KERN_INFO PFX "VRA mode not enabled; rate fixed at %d.", s->dacRate); } /* let us get the default volumne louder */ wrcodec(s->codec, 0x2, 0x1010); /* master volume, middle */ wrcodec(s->codec, 0xc, 0x10); /* phone volume, middle */ // wrcodec(s->codec, 0xe, 0x10); /* misc volume, middle */ wrcodec(s->codec, 0x10, 0x8000); /* line-in 2 line-out disable */ wrcodec(s->codec, 0x18, 0x0707); /* PCM out (line out) middle */ /* by default we select line in the input */ wrcodec(s->codec, 0x1a, 0x0404); wrcodec(s->codec, 0x1c, 0x0f0f); wrcodec(s->codec, 0x1e, 0x07); /* enable the master interrupt but disable all others */ outl(VRC5477_INT_MASK_NMASK, s->io + VRC5477_INT_MASK); /* store it in the driver field */ pci_set_drvdata(pcidev, s); pcidev->dma_mask = 0xffffffff; /* put it into driver list */ list_add_tail(&s->devs, &devs); /* increment devindex */ if (devindex < NR_DEVICE-1) devindex++; return 0; err_dev3: unregister_sound_mixer(s->codec->dev_mixer); err_dev2: unregister_sound_dsp(s->dev_audio); err_dev1: printk(KERN_ERR PFX "cannot register misc device\n"); free_irq(s->irq, s); err_irq: release_region(s->io, pci_resource_len(pcidev,0)); err_region: ac97_release_codec(codec); kfree(s); return -1; } static void __devexit vrc5477_ac97_remove(struct pci_dev *dev) { struct vrc5477_ac97_state *s = pci_get_drvdata(dev); if (!s) return; list_del(&s->devs); #ifdef VRC5477_AC97_DEBUG if (s->ps) remove_proc_entry(VRC5477_AC97_MODULE_NAME, NULL); #endif /* VRC5477_AC97_DEBUG */ synchronize_irq(); free_irq(s->irq, s); release_region(s->io, pci_resource_len(dev,0)); unregister_sound_dsp(s->dev_audio); unregister_sound_mixer(s->codec->dev_mixer); ac97_release_codec(s->codec); kfree(s); pci_set_drvdata(dev, NULL); } static struct pci_device_id id_table[] __devinitdata = { { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_VRC5477_AC97, PCI_ANY_ID, PCI_ANY_ID, 0, 0 }, { 0, } }; MODULE_DEVICE_TABLE(pci, id_table); static struct pci_driver vrc5477_ac97_driver = { name: VRC5477_AC97_MODULE_NAME, id_table: id_table, probe: vrc5477_ac97_probe, remove: __devexit_p(vrc5477_ac97_remove) }; static int __init init_vrc5477_ac97(void) { if (!pci_present()) /* No PCI bus in this machine! */ return -ENODEV; printk("Vrc5477 AC97 driver: version v0.2 time " __TIME__ " " __DATE__ " by Jun Sun\n"); return pci_module_init(&vrc5477_ac97_driver); } static void __exit cleanup_vrc5477_ac97(void) { printk(KERN_INFO PFX "unloading\n"); pci_unregister_driver(&vrc5477_ac97_driver); } module_init(init_vrc5477_ac97); module_exit(cleanup_vrc5477_ac97);