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Diffstat (limited to 'sound/oss/nec_vrc5477.c')
| -rw-r--r-- | sound/oss/nec_vrc5477.c | 2059 |
1 files changed, 2059 insertions, 0 deletions
diff --git a/sound/oss/nec_vrc5477.c b/sound/oss/nec_vrc5477.c new file mode 100644 index 00000000000..0481e5e54dd --- /dev/null +++ b/sound/oss/nec_vrc5477.c @@ -0,0 +1,2059 @@ +/*********************************************************************** + * 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 <brad@ltc.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 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 <linux/module.h> +#include <linux/string.h> +#include <linux/kernel.h> +#include <linux/ioport.h> +#include <linux/sched.h> +#include <linux/delay.h> +#include <linux/sound.h> +#include <linux/slab.h> +#include <linux/soundcard.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/poll.h> +#include <linux/bitops.h> +#include <linux/proc_fs.h> +#include <linux/spinlock.h> +#include <linux/smp_lock.h> +#include <linux/ac97_codec.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/uaccess.h> + +/* -------------------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) +#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; /* check sync between intr & write */ +static u16 outTicket; +#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 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; +} + +/* --------------------------------------------------------------------- */ + +extern 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); +} + +extern 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 + +extern 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 irqreturn_t 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); + return IRQ_HANDLED; +} + +/* --------------------------------------------------------------------- */ + +static int vrc5477_ac97_open_mixdev(struct inode *inode, struct file *file) +{ + int minor = iminor(inode); + 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 nonseekable_open(inode, file); +} + +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 inline int +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 inline int +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 (!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 inline int +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 inline int +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 (!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; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) { + if (ioctl_str[count].cmd == cmd) + break; + } + if (count < sizeof(ioctl_str)/sizeof(ioctl_str[0])) + printk(KERN_INFO PFX "ioctl %s\n", ioctl_str[count].str); + else + printk(KERN_INFO PFX "ioctl unknown, 0x%x\n", cmd); +#endif + + switch (cmd) { + case OSS_GETVERSION: + return put_user(SOUND_VERSION, (int *)arg); + + case SNDCTL_DSP_SYNC: + if (file->f_mode & FMODE_WRITE) + return drain_dac(s, file->f_flags & O_NONBLOCK); + return 0; + + case SNDCTL_DSP_SETDUPLEX: + return 0; + + case SNDCTL_DSP_GETCAPS: + return put_user(DSP_CAP_DUPLEX, (int *)arg); + + case SNDCTL_DSP_RESET: + if (file->f_mode & FMODE_WRITE) { + stop_dac(s); + synchronize_irq(s->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->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 = iminor(inode); + DECLARE_WAITQUEUE(wait, current); + unsigned long flags; + struct list_head *list; + struct vrc5477_ac97_state *s; + int ret=0; + + nonseekable_open(inode, file); + 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; + +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; + + } + + /* 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 + /* initialize 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[] = { + { 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) +{ + 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); + |