ca0106_main.c

linux-2.6.15.6

        channel->use=1;
        //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
        //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
        channel->epcm=epcm;
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                return err;
	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
                return err;
	return 0;
}

/* close callback */
static int snd_ca0106_pcm_close_playback(snd_pcm_substream_t *substream)
{
	ca0106_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
        ca0106_pcm_t *epcm = runtime->private_data;
        chip->playback_channels[epcm->channel_id].use=0;
/* FIXME: maybe zero others */
	return 0;
}

static int snd_ca0106_pcm_open_playback_front(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_FRONT_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_center_lfe(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_CENTER_LFE_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_unknown(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_UNKNOWN_CHANNEL);
}

static int snd_ca0106_pcm_open_playback_rear(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_playback_channel(substream, PCM_REAR_CHANNEL);
}

/* open_capture callback */
static int snd_ca0106_pcm_open_capture_channel(snd_pcm_substream_t *substream, int channel_id)
{
	ca0106_t *chip = snd_pcm_substream_chip(substream);
        ca0106_channel_t *channel = &(chip->capture_channels[channel_id]);
	ca0106_pcm_t *epcm;
	snd_pcm_runtime_t *runtime = substream->runtime;
	int err;

	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
	if (epcm == NULL) {
		snd_printk(KERN_ERR "open_capture_channel: failed epcm alloc\n");
		return -ENOMEM;
        }
	epcm->emu = chip;
	epcm->substream = substream;
        epcm->channel_id=channel_id;
  
	runtime->private_data = epcm;
	runtime->private_free = snd_ca0106_pcm_free_substream;
  
	runtime->hw = snd_ca0106_capture_hw;

        channel->emu = chip;
        channel->number = channel_id;

        channel->use=1;
        //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
        //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
        channel->epcm=epcm;
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                return err;
	//snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
                return err;
	return 0;
}

/* close callback */
static int snd_ca0106_pcm_close_capture(snd_pcm_substream_t *substream)
{
	ca0106_t *chip = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
        ca0106_pcm_t *epcm = runtime->private_data;
        chip->capture_channels[epcm->channel_id].use=0;
/* FIXME: maybe zero others */
	return 0;
}

static int snd_ca0106_pcm_open_0_capture(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 0);
}

static int snd_ca0106_pcm_open_1_capture(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 1);
}

static int snd_ca0106_pcm_open_2_capture(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 2);
}

static int snd_ca0106_pcm_open_3_capture(snd_pcm_substream_t *substream)
{
	return snd_ca0106_pcm_open_capture_channel(substream, 3);
}

/* hw_params callback */
static int snd_ca0106_pcm_hw_params_playback(snd_pcm_substream_t *substream,
				      snd_pcm_hw_params_t * hw_params)
{
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

/* hw_free callback */
static int snd_ca0106_pcm_hw_free_playback(snd_pcm_substream_t *substream)
{
	return snd_pcm_lib_free_pages(substream);
}

/* hw_params callback */
static int snd_ca0106_pcm_hw_params_capture(snd_pcm_substream_t *substream,
				      snd_pcm_hw_params_t * hw_params)
{
	return snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
}

/* hw_free callback */
static int snd_ca0106_pcm_hw_free_capture(snd_pcm_substream_t *substream)
{
	return snd_pcm_lib_free_pages(substream);
}

/* prepare playback callback */
static int snd_ca0106_pcm_prepare_playback(snd_pcm_substream_t *substream)
{
	ca0106_t *emu = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	ca0106_pcm_t *epcm = runtime->private_data;
	int channel = epcm->channel_id;
	u32 *table_base = (u32 *)(emu->buffer.area+(8*16*channel));
	u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
	u32 hcfg_mask = HCFG_PLAYBACK_S32_LE;
	u32 hcfg_set = 0x00000000;
	u32 hcfg;
	u32 reg40_mask = 0x30000 << (channel<<1);
	u32 reg40_set = 0;
	u32 reg40;
	/* FIXME: Depending on mixer selection of SPDIF out or not, select the spdif rate or the DAC rate. */
	u32 reg71_mask = 0x03030000 ; /* Global. Set SPDIF rate. We only support 44100 to spdif, not to DAC. */
	u32 reg71_set = 0;
	u32 reg71;
	int i;
	
        //snd_printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, periods=%u, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size, runtime->periods, frames_to_bytes(runtime, 1));
        //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
	/* Rate can be set per channel. */
	/* reg40 control host to fifo */
	/* reg71 controls DAC rate. */
	switch (runtime->rate) {
	case 44100:
		reg40_set = 0x10000 << (channel<<1);
		reg71_set = 0x01010000; 
		break;
        case 48000:
		reg40_set = 0;
		reg71_set = 0; 
		break;
	case 96000:
		reg40_set = 0x20000 << (channel<<1);
		reg71_set = 0x02020000; 
		break;
	case 192000:
		reg40_set = 0x30000 << (channel<<1);
		reg71_set = 0x03030000; 
		break;
	default:
		reg40_set = 0;
		reg71_set = 0; 
		break;
	}
	/* Format is a global setting */
	/* FIXME: Only let the first channel accessed set this. */
	switch (runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		hcfg_set = 0;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		hcfg_set = HCFG_PLAYBACK_S32_LE;
		break;
	default:
		hcfg_set = 0;
		break;
	}
	hcfg = inl(emu->port + HCFG) ;
	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
	outl(hcfg, emu->port + HCFG);
	reg40 = snd_ca0106_ptr_read(emu, 0x40, 0);
	reg40 = (reg40 & ~reg40_mask) | reg40_set;
	snd_ca0106_ptr_write(emu, 0x40, 0, reg40);
	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
	reg71 = (reg71 & ~reg71_mask) | reg71_set;
	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);

	/* FIXME: Check emu->buffer.size before actually writing to it. */
        for(i=0; i < runtime->periods; i++) {
		table_base[i*2]=runtime->dma_addr+(i*period_size_bytes);
		table_base[(i*2)+1]=period_size_bytes<<16;
	}
 
	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer.addr+(8*16*channel));
	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19);
	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_PTR, channel, 0);
	snd_ca0106_ptr_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr);
	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, frames_to_bytes(runtime, runtime->period_size)<<16); // buffer size in bytes
	/* FIXME  test what 0 bytes does. */
	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, 0); // buffer size in bytes
	snd_ca0106_ptr_write(emu, PLAYBACK_POINTER, channel, 0);
	snd_ca0106_ptr_write(emu, 0x07, channel, 0x0);
	snd_ca0106_ptr_write(emu, 0x08, channel, 0);
        snd_ca0106_ptr_write(emu, PLAYBACK_MUTE, 0x0, 0x0); /* Unmute output */
#if 0
	snd_ca0106_ptr_write(emu, SPCS0, 0,
			       SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
			       SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
			       SPCS_GENERATIONSTATUS | 0x00001200 |
			       0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT );
	}
#endif

	return 0;
}

/* prepare capture callback */
static int snd_ca0106_pcm_prepare_capture(snd_pcm_substream_t *substream)
{
	ca0106_t *emu = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	ca0106_pcm_t *epcm = runtime->private_data;
	int channel = epcm->channel_id;
	u32 hcfg_mask = HCFG_CAPTURE_S32_LE;
	u32 hcfg_set = 0x00000000;
	u32 hcfg;
	u32 over_sampling=0x2;
	u32 reg71_mask = 0x0000c000 ; /* Global. Set ADC rate. */
	u32 reg71_set = 0;
	u32 reg71;
	
        //snd_printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, periods=%u, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size, runtime->periods, frames_to_bytes(runtime, 1));
        //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
	/* reg71 controls ADC rate. */
	switch (runtime->rate) {
	case 44100:
		reg71_set = 0x00004000;
		break;
        case 48000:
		reg71_set = 0; 
		break;
	case 96000:
		reg71_set = 0x00008000;
		over_sampling=0xa;
		break;
	case 192000:
		reg71_set = 0x0000c000; 
		over_sampling=0xa;
		break;
	default:
		reg71_set = 0; 
		break;
	}
	/* Format is a global setting */
	/* FIXME: Only let the first channel accessed set this. */
	switch (runtime->format) {
	case SNDRV_PCM_FORMAT_S16_LE:
		hcfg_set = 0;
		break;
	case SNDRV_PCM_FORMAT_S32_LE:
		hcfg_set = HCFG_CAPTURE_S32_LE;
		break;
	default:
		hcfg_set = 0;
		break;
	}
	hcfg = inl(emu->port + HCFG) ;
	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
	outl(hcfg, emu->port + HCFG);
	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
	reg71 = (reg71 & ~reg71_mask) | reg71_set;
	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
        if (emu->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
	        snd_ca0106_i2c_write(emu, ADC_MASTER, over_sampling); /* Adjust the over sampler to better suit the capture rate. */
	}


        //printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size,  frames_to_bytes(runtime, 1));
	snd_ca0106_ptr_write(emu, 0x13, channel, 0);
	snd_ca0106_ptr_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
	snd_ca0106_ptr_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes
	snd_ca0106_ptr_write(emu, CAPTURE_POINTER, channel, 0);

	return 0;
}

/* trigger_playback callback */
static int snd_ca0106_pcm_trigger_playback(snd_pcm_substream_t *substream,
				    int cmd)
{
	ca0106_t *emu = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime;
	ca0106_pcm_t *epcm;
	int channel;
	int result = 0;
	struct list_head *pos;
        snd_pcm_substream_t *s;
	u32 basic = 0;
	u32 extended = 0;
	int running=0;

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		running=1;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
	default:
		running=0;
		break;
	}
        snd_pcm_group_for_each(pos, substream) {
                s = snd_pcm_group_substream_entry(pos);
		runtime = s->runtime;
		epcm = runtime->private_data;
		channel = epcm->channel_id;
		//snd_printk("channel=%d\n",channel);
		epcm->running = running;
		basic |= (0x1<<channel);
		extended |= (0x10<<channel);
                snd_pcm_trigger_done(s, substream);
        }
	//snd_printk("basic=0x%x, extended=0x%x\n",basic, extended);

	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) | (extended));
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(basic));
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(basic));
		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(extended));
		break;
	default:
		result = -EINVAL;
		break;
	}
	return result;
}

/* trigger_capture callback */
static int snd_ca0106_pcm_trigger_capture(snd_pcm_substream_t *substream,
				    int cmd)
{
	ca0106_t *emu = snd_pcm_substream_chip(substream);
	snd_pcm_runtime_t *runtime = substream->runtime;
	ca0106_pcm_t *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));