ca0106_main.c

LINUX 2.6.17.4的源码

	return result;
}

/* trigger_capture callback */
static int snd_ca0106_pcm_trigger_capture(struct snd_pcm_substream *substream,
				    int cmd)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	int channel = epcm->channel_id;
	int result = 0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (0x110000<<channel));
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(0x100<<channel));
		epcm->running = 1;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(0x100<<channel));
		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(0x110000<<channel));
		epcm->running = 0;
		break;
	default:
		result = -EINVAL;
		break;
	}
	return result;
}

/* pointer_playback callback */
static snd_pcm_uframes_t
snd_ca0106_pcm_pointer_playback(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	snd_pcm_uframes_t ptr, ptr1, ptr2,ptr3,ptr4 = 0;
	int channel = epcm->channel_id;

	if (!epcm->running)
		return 0;

	ptr3 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
	ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
	ptr4 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
	if (ptr3 != ptr4) ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
	ptr2 = bytes_to_frames(runtime, ptr1);
	ptr2+= (ptr4 >> 3) * runtime->period_size;
	ptr=ptr2;
        if (ptr >= runtime->buffer_size)
		ptr -= runtime->buffer_size;
	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);

	return ptr;
}

/* pointer_capture callback */
static snd_pcm_uframes_t
snd_ca0106_pcm_pointer_capture(struct snd_pcm_substream *substream)
{
	struct snd_ca0106 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	struct snd_ca0106_pcm *epcm = runtime->private_data;
	snd_pcm_uframes_t ptr, ptr1, ptr2 = 0;
	int channel = channel=epcm->channel_id;

	if (!epcm->running)
		return 0;

	ptr1 = snd_ca0106_ptr_read(emu, CAPTURE_POINTER, channel);
	ptr2 = bytes_to_frames(runtime, ptr1);
	ptr=ptr2;
        if (ptr >= runtime->buffer_size)
		ptr -= runtime->buffer_size;
	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);

	return ptr;
}

/* operators */
static struct snd_pcm_ops snd_ca0106_playback_front_ops = {
	.open =        snd_ca0106_pcm_open_playback_front,
	.close =       snd_ca0106_pcm_close_playback,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_playback,
	.hw_free =     snd_ca0106_pcm_hw_free_playback,
	.prepare =     snd_ca0106_pcm_prepare_playback,
	.trigger =     snd_ca0106_pcm_trigger_playback,
	.pointer =     snd_ca0106_pcm_pointer_playback,
};

static struct snd_pcm_ops snd_ca0106_capture_0_ops = {
	.open =        snd_ca0106_pcm_open_0_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_capture_1_ops = {
	.open =        snd_ca0106_pcm_open_1_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_capture_2_ops = {
	.open =        snd_ca0106_pcm_open_2_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_capture_3_ops = {
	.open =        snd_ca0106_pcm_open_3_capture,
	.close =       snd_ca0106_pcm_close_capture,
	.ioctl =       snd_pcm_lib_ioctl,
	.hw_params =   snd_ca0106_pcm_hw_params_capture,
	.hw_free =     snd_ca0106_pcm_hw_free_capture,
	.prepare =     snd_ca0106_pcm_prepare_capture,
	.trigger =     snd_ca0106_pcm_trigger_capture,
	.pointer =     snd_ca0106_pcm_pointer_capture,
};

static struct snd_pcm_ops snd_ca0106_playback_center_lfe_ops = {
        .open =         snd_ca0106_pcm_open_playback_center_lfe,
        .close =        snd_ca0106_pcm_close_playback,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_ca0106_pcm_hw_params_playback,
        .hw_free =      snd_ca0106_pcm_hw_free_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};

static struct snd_pcm_ops snd_ca0106_playback_unknown_ops = {
        .open =         snd_ca0106_pcm_open_playback_unknown,
        .close =        snd_ca0106_pcm_close_playback,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_ca0106_pcm_hw_params_playback,
        .hw_free =      snd_ca0106_pcm_hw_free_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};

static struct snd_pcm_ops snd_ca0106_playback_rear_ops = {
        .open =         snd_ca0106_pcm_open_playback_rear,
        .close =        snd_ca0106_pcm_close_playback,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_ca0106_pcm_hw_params_playback,
		.hw_free =      snd_ca0106_pcm_hw_free_playback,
        .prepare =      snd_ca0106_pcm_prepare_playback,     
        .trigger =      snd_ca0106_pcm_trigger_playback,  
        .pointer =      snd_ca0106_pcm_pointer_playback, 
};


static unsigned short snd_ca0106_ac97_read(struct snd_ac97 *ac97,
					     unsigned short reg)
{
	struct snd_ca0106 *emu = ac97->private_data;
	unsigned long flags;
	unsigned short val;

	spin_lock_irqsave(&emu->emu_lock, flags);
	outb(reg, emu->port + AC97ADDRESS);
	val = inw(emu->port + AC97DATA);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
	return val;
}

static void snd_ca0106_ac97_write(struct snd_ac97 *ac97,
				    unsigned short reg, unsigned short val)
{
	struct snd_ca0106 *emu = ac97->private_data;
	unsigned long flags;
  
	spin_lock_irqsave(&emu->emu_lock, flags);
	outb(reg, emu->port + AC97ADDRESS);
	outw(val, emu->port + AC97DATA);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
}

static int snd_ca0106_ac97(struct snd_ca0106 *chip)
{
	struct snd_ac97_bus *pbus;
	struct snd_ac97_template ac97;
	int err;
	static struct snd_ac97_bus_ops ops = {
		.write = snd_ca0106_ac97_write,
		.read = snd_ca0106_ac97_read,
	};
  
	if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus)) < 0)
		return err;
	pbus->no_vra = 1; /* we don't need VRA */

	memset(&ac97, 0, sizeof(ac97));
	ac97.private_data = chip;
	ac97.scaps = AC97_SCAP_NO_SPDIF;
	return snd_ac97_mixer(pbus, &ac97, &chip->ac97);
}

static int snd_ca0106_free(struct snd_ca0106 *chip)
{
	if (chip->res_port != NULL) {    /* avoid access to already used hardware */
		// disable interrupts
		snd_ca0106_ptr_write(chip, BASIC_INTERRUPT, 0, 0);
		outl(0, chip->port + INTE);
		snd_ca0106_ptr_write(chip, EXTENDED_INT_MASK, 0, 0);
		udelay(1000);
		// disable audio
		//outl(HCFG_LOCKSOUNDCACHE, chip->port + HCFG);
		outl(0, chip->port + HCFG);
		/* FIXME: We need to stop and DMA transfers here.
		 *        But as I am not sure how yet, we cannot from the dma pages.
		 * So we can fix: snd-malloc: Memory leak?  pages not freed = 8
		 */
	}
	// release the data
#if 1
	if (chip->buffer.area)
		snd_dma_free_pages(&chip->buffer);
#endif

	// release the i/o port
	release_and_free_resource(chip->res_port);

	// release the irq
	if (chip->irq >= 0)
		free_irq(chip->irq, (void *)chip);
	pci_disable_device(chip->pci);
	kfree(chip);
	return 0;
}

static int snd_ca0106_dev_free(struct snd_device *device)
{
	struct snd_ca0106 *chip = device->device_data;
	return snd_ca0106_free(chip);
}

static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id,
					  struct pt_regs *regs)
{
	unsigned int status;

	struct snd_ca0106 *chip = dev_id;
	int i;
	int mask;
        unsigned int stat76;
	struct snd_ca0106_channel *pchannel;

	status = inl(chip->port + IPR);
	if (! status)
		return IRQ_NONE;

        stat76 = snd_ca0106_ptr_read(chip, EXTENDED_INT, 0);
	//snd_printk("interrupt status = 0x%08x, stat76=0x%08x\n", status, stat76);
	//snd_printk("ptr=0x%08x\n",snd_ca0106_ptr_read(chip, PLAYBACK_POINTER, 0));
        mask = 0x11; /* 0x1 for one half, 0x10 for the other half period. */
	for(i = 0; i < 4; i++) {
		pchannel = &(chip->playback_channels[i]);
		if (stat76 & mask) {
/* FIXME: Select the correct substream for period elapsed */
			if(pchannel->use) {
				snd_pcm_period_elapsed(pchannel->epcm->substream);
				//printk(KERN_INFO "interrupt [%d] used\n", i);
                        }
		}
	        //printk(KERN_INFO "channel=%p\n",pchannel);
	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
		mask <<= 1;
	}
        mask = 0x110000; /* 0x1 for one half, 0x10 for the other half period. */
	for(i = 0; i < 4; i++) {
		pchannel = &(chip->capture_channels[i]);
		if (stat76 & mask) {
/* FIXME: Select the correct substream for period elapsed */
			if(pchannel->use) {
				snd_pcm_period_elapsed(pchannel->epcm->substream);
				//printk(KERN_INFO "interrupt [%d] used\n", i);
                        }
		}
	        //printk(KERN_INFO "channel=%p\n",pchannel);
	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
		mask <<= 1;
	}

        snd_ca0106_ptr_write(chip, EXTENDED_INT, 0, stat76);

	if (chip->midi.dev_id &&
	    (status & (chip->midi.ipr_tx|chip->midi.ipr_rx))) {
		if (chip->midi.interrupt)
			chip->midi.interrupt(&chip->midi, status);
		else
			chip->midi.interrupt_disable(&chip->midi, chip->midi.tx_enable | chip->midi.rx_enable);
	}

	// acknowledge the interrupt if necessary
	outl(status, chip->port+IPR);

	return IRQ_HANDLED;
}

static int __devinit snd_ca0106_pcm(struct snd_ca0106 *emu, int device, struct snd_pcm **rpcm)
{
	struct snd_pcm *pcm;
	struct snd_pcm_substream *substream;
	int err;
  
	if (rpcm)
		*rpcm = NULL;
	if ((err = snd_pcm_new(emu->card, "ca0106", device, 1, 1, &pcm)) < 0)
		return err;
  
	pcm->private_data = emu;

	switch (device) {
	case 0:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_front_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_0_ops);
          break;
	case 1:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_rear_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_1_ops);
          break;
	case 2:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_center_lfe_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_2_ops);
          break;
	case 3:
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_unknown_ops);
	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_3_ops);
          break;
        }

	pcm->info_flags = 0;
	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
	strcpy(pcm->name, "CA0106");
	emu->pcm = pcm;

	for(substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream; 
	    substream; 
	    substream = substream->next) {
		if ((err = snd_pcm_lib_preallocate_pages(substream, 
							 SNDRV_DMA_TYPE_DEV, 
							 snd_dma_pci_data(emu->pci), 
							 64*1024, 64*1024)) < 0) /* FIXME: 32*1024 for sound buffer, between 32and64 for Periods table. */
			return err;
	}

	for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; 
	      substream; 
	      substream = substream->next) {
 		if ((err = snd_pcm_lib_preallocate_pages(substream, 
	                                           SNDRV_DMA_TYPE_DEV, 
	                                           snd_dma_pci_data(emu->pci), 
	                                           64*1024, 64*1024)) < 0)
			return err;
	}
  
	if (rpcm)
		*rpcm = pcm;
  
	return 0;
}

static unsigned int spi_dac_init[] = {
	0x00ff,
	0x02ff,
	0x0400,
	0x0520,
	0x0600,
	0x08ff,
	0x0aff,
	0x0cff,
	0x0eff,
	0x10ff,
	0x1200,
	0x1400,
	0x1480,
	0x1800,
	0x1aff,