p16v.c

linux2.6.16版本

/*
 *  Copyright (c) by James Courtier-Dutton <[e-mail]>
 *  Driver p16v chips
 *  Version: 0.25
 *
 *  FEATURES currently supported:
 *    Output fixed at S32_LE, 2 channel to hw:0,0
 *    Rates: 44.1, 48, 96, 192.
 *
 *  Changelog:
 *  0.8
 *    Use separate card based buffer for periods table.
 *  0.9
 *    Use 2 channel output streams instead of 8 channel.
 *       (8 channel output streams might be good for ASIO type output)
 *    Corrected speaker output, so Front -> Front etc.
 *  0.10
 *    Fixed missed interrupts.
 *  0.11
 *    Add Sound card model number and names.
 *    Add Analog volume controls.
 *  0.12
 *    Corrected playback interrupts. Now interrupt per period, instead of half period.
 *  0.13
 *    Use single trigger for multichannel.
 *  0.14
 *    Mic capture now works at fixed: S32_LE, 96000Hz, Stereo.
 *  0.15
 *    Force buffer_size / period_size == INTEGER.
 *  0.16
 *    Update p16v.c to work with changed alsa api.
 *  0.17
 *    Update p16v.c to work with changed alsa api. Removed boot_devs.
 *  0.18
 *    Merging with snd-emu10k1 driver.
 *  0.19
 *    One stereo channel at 24bit now works.
 *  0.20
 *    Added better register defines.
 *  0.21
 *    Integrated with snd-emu10k1 driver.
 *  0.22
 *    Removed #if 0 ... #endif
 *  0.23
 *    Implement different capture rates.
 *  0.24
 *    Implement different capture source channels.
 *    e.g. When HD Capture source is set to SPDIF,
 *    setting HD Capture channel to 0 captures from CDROM digital input.
 *    setting HD Capture channel to 1 captures from SPDIF in.
 *  0.25
 *    Include capture buffer sizes.
 *
 *  BUGS:
 *    Some stability problems when unloading the snd-p16v kernel module.
 *    --
 *
 *  TODO:
 *    SPDIF out.
 *    Find out how to change capture sample rates. E.g. To record SPDIF at 48000Hz.
 *    Currently capture fixed at 48000Hz.
 *
 *    --
 *  GENERAL INFO:
 *    Model: SB0240
 *    P16V Chip: CA0151-DBS
 *    Audigy 2 Chip: CA0102-IAT
 *    AC97 Codec: STAC 9721
 *    ADC: Philips 1361T (Stereo 24bit)
 *    DAC: CS4382-K (8-channel, 24bit, 192Khz)
 *
 *  This code was initally based on code from ALSA's emu10k1x.c which is:
 *  Copyright (c) by Francisco Moraes <[e-mail]>
 *
 *   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 program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */
#include <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/initval.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/info.h>
#include <sound/emu10k1.h>
#include "p16v.h"

#define SET_CHANNEL 0  /* Testing channel outputs 0=Front, 1=Center/LFE, 2=Unknown, 3=Rear */
#define PCM_FRONT_CHANNEL 0
#define PCM_REAR_CHANNEL 1
#define PCM_CENTER_LFE_CHANNEL 2
#define PCM_SIDE_CHANNEL 3
#define CONTROL_FRONT_CHANNEL 0
#define CONTROL_REAR_CHANNEL 3
#define CONTROL_CENTER_LFE_CHANNEL 1
#define CONTROL_SIDE_CHANNEL 2

/* Card IDs:
 * Class 0401: 1102:0004 (rev 04) Subsystem: 1102:2002 -> Audigy2 ZS 7.1 Model:SB0350
 * Class 0401: 1102:0004 (rev 04) Subsystem: 1102:1007 -> Audigy2 6.1    Model:SB0240
 * Class 0401: 1102:0004 (rev 04) Subsystem: 1102:1002 -> Audigy2 Platinum  Model:SB msb0240230009266
 * Class 0401: 1102:0004 (rev 04) Subsystem: 1102:2007 -> Audigy4 Pro Model:SB0380 M1SB0380472001901E
 *
 */

 /* hardware definition */
static struct snd_pcm_hardware snd_p16v_playback_hw = {
	.info =			(SNDRV_PCM_INFO_MMAP | 
				 SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_RESUME |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S32_LE, /* Only supports 24-bit samples padded to 32 bits. */
	.rates =		SNDRV_PCM_RATE_192000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100, 
	.rate_min =		44100,
	.rate_max =		192000,
	.channels_min =		8, 
	.channels_max =		8,
	.buffer_bytes_max =	((65536 - 64) * 8),
	.period_bytes_min =	64,
	.period_bytes_max =	(65536 - 64),
	.periods_min =		2,
	.periods_max =		8,
	.fifo_size =		0,
};

static struct snd_pcm_hardware snd_p16v_capture_hw = {
	.info =			(SNDRV_PCM_INFO_MMAP |
				 SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_RESUME |
				 SNDRV_PCM_INFO_MMAP_VALID),
	.formats =		SNDRV_PCM_FMTBIT_S32_LE,
	.rates =		SNDRV_PCM_RATE_192000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_44100, 
	.rate_min =		44100,
	.rate_max =		192000,
	.channels_min =		2,
	.channels_max =		2,
	.buffer_bytes_max =	(65536 - 64),
	.period_bytes_min =	64,
	.period_bytes_max =	(65536 - 128) >> 1,  /* size has to be N*64 bytes */
	.periods_min =		2,
	.periods_max =		2,
	.fifo_size =		0,
};

static void snd_p16v_pcm_free_substream(struct snd_pcm_runtime *runtime)
{
	struct snd_emu10k1_pcm *epcm = runtime->private_data;
  
	if (epcm) {
        	//snd_printk("epcm free: %p\n", epcm);
		kfree(epcm);
	}
}

/* open_playback callback */
static int snd_p16v_pcm_open_playback_channel(struct snd_pcm_substream *substream, int channel_id)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
        struct snd_emu10k1_voice *channel = &(emu->p16v_voices[channel_id]);
	struct snd_emu10k1_pcm *epcm;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
        //snd_printk("epcm kcalloc: %p\n", epcm);

	if (epcm == NULL)
		return -ENOMEM;
	epcm->emu = emu;
	epcm->substream = substream;
        //snd_printk("epcm device=%d, channel_id=%d\n", substream->pcm->device, channel_id);
  
	runtime->private_data = epcm;
	runtime->private_free = snd_p16v_pcm_free_substream;
  
	runtime->hw = snd_p16v_playback_hw;

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

        channel->use=1;
	//snd_printk("p16v: open channel_id=%d, channel=%p, use=0x%x\n", channel_id, channel, channel->use);
        //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
        //channel->interrupt = snd_p16v_pcm_channel_interrupt;
        channel->epcm=epcm;
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
                return err;

	return 0;
}
/* open_capture callback */
static int snd_p16v_pcm_open_capture_channel(struct snd_pcm_substream *substream, int channel_id)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	struct snd_emu10k1_voice *channel = &(emu->p16v_capture_voice);
	struct snd_emu10k1_pcm *epcm;
	struct snd_pcm_runtime *runtime = substream->runtime;
	int err;

	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
	//snd_printk("epcm kcalloc: %p\n", epcm);

	if (epcm == NULL)
		return -ENOMEM;
	epcm->emu = emu;
	epcm->substream = substream;
	//snd_printk("epcm device=%d, channel_id=%d\n", substream->pcm->device, channel_id);

	runtime->private_data = epcm;
	runtime->private_free = snd_p16v_pcm_free_substream;
  
	runtime->hw = snd_p16v_capture_hw;

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

	channel->use=1;
	//snd_printk("p16v: open channel_id=%d, channel=%p, use=0x%x\n", channel_id, channel, channel->use);
	//printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
	//channel->interrupt = snd_p16v_pcm_channel_interrupt;
	channel->epcm=epcm;
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
		return err;

	return 0;
}


/* close callback */
static int snd_p16v_pcm_close_playback(struct snd_pcm_substream *substream)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	//struct snd_pcm_runtime *runtime = substream->runtime;
	//struct snd_emu10k1_pcm *epcm = runtime->private_data;
	emu->p16v_voices[substream->pcm->device - emu->p16v_device_offset].use=0;
	/* FIXME: maybe zero others */
	return 0;
}

/* close callback */
static int snd_p16v_pcm_close_capture(struct snd_pcm_substream *substream)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	//struct snd_pcm_runtime *runtime = substream->runtime;
	//struct snd_emu10k1_pcm *epcm = runtime->private_data;
	emu->p16v_capture_voice.use=0;
	/* FIXME: maybe zero others */
	return 0;
}

static int snd_p16v_pcm_open_playback_front(struct snd_pcm_substream *substream)
{
	return snd_p16v_pcm_open_playback_channel(substream, PCM_FRONT_CHANNEL);
}

static int snd_p16v_pcm_open_capture(struct snd_pcm_substream *substream)
{
	// Only using channel 0 for now, but the card has 2 channels.
	return snd_p16v_pcm_open_capture_channel(substream, 0);
}

/* hw_params callback */
static int snd_p16v_pcm_hw_params_playback(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *hw_params)
{
	int result;
	result = snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
	return result;
}

/* hw_params callback */
static int snd_p16v_pcm_hw_params_capture(struct snd_pcm_substream *substream,
				      struct snd_pcm_hw_params *hw_params)
{
	int result;
	result = snd_pcm_lib_malloc_pages(substream,
					params_buffer_bytes(hw_params));
	return result;
}


/* hw_free callback */
static int snd_p16v_pcm_hw_free_playback(struct snd_pcm_substream *substream)
{
	int result;
	result = snd_pcm_lib_free_pages(substream);
	return result;
}

/* hw_free callback */
static int snd_p16v_pcm_hw_free_capture(struct snd_pcm_substream *substream)
{
	int result;
	result = snd_pcm_lib_free_pages(substream);
	return result;
}


/* prepare playback callback */
static int snd_p16v_pcm_prepare_playback(struct snd_pcm_substream *substream)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	int channel = substream->pcm->device - emu->p16v_device_offset;
	u32 *table_base = (u32 *)(emu->p16v_buffer.area+(8*16*channel));
	u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
	int i;
	u32 tmp;
	
        //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->p16v_buffer.addr, emu->p16v_buffer.area, emu->p16v_buffer.bytes);
	tmp = snd_emu10k1_ptr_read(emu, A_SPDIF_SAMPLERATE, channel);
        switch (runtime->rate) {
	case 44100:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe0e0) | 0x8080);
	  break;
	case 96000:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe0e0) | 0x4040);
	  break;
	case 192000:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe0e0) | 0x2020);
	  break;
	case 48000:
	default:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0xe0e0) | 0x0000);
	  break;
	}
	/* 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_emu10k1_ptr20_write(emu, PLAYBACK_LIST_ADDR, channel, emu->p16v_buffer.addr+(8*16*channel));
	snd_emu10k1_ptr20_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19);
	snd_emu10k1_ptr20_write(emu, PLAYBACK_LIST_PTR, channel, 0);
	snd_emu10k1_ptr20_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr);
	//snd_emu10k1_ptr20_write(emu, PLAYBACK_PERIOD_SIZE, channel, frames_to_bytes(runtime, runtime->period_size)<<16); // buffer size in bytes
	snd_emu10k1_ptr20_write(emu, PLAYBACK_PERIOD_SIZE, channel, 0); // buffer size in bytes
	snd_emu10k1_ptr20_write(emu, PLAYBACK_POINTER, channel, 0);
	snd_emu10k1_ptr20_write(emu, 0x07, channel, 0x0);
	snd_emu10k1_ptr20_write(emu, 0x08, channel, 0);

	return 0;
}

/* prepare capture callback */
static int snd_p16v_pcm_prepare_capture(struct snd_pcm_substream *substream)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime = substream->runtime;
	int channel = substream->pcm->device - emu->p16v_device_offset;
	u32 tmp;
	//printk("prepare capture: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));
	tmp = snd_emu10k1_ptr_read(emu, A_SPDIF_SAMPLERATE, channel);
        switch (runtime->rate) {
	case 44100:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0800);
	  break;
	case 96000:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0400);
	  break;
	case 192000:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0200);
	  break;
	case 48000:
	default:
	  snd_emu10k1_ptr_write(emu, A_SPDIF_SAMPLERATE, channel, (tmp & ~0x0e00) | 0x0000);
	  break;
	}
	/* FIXME: Check emu->buffer.size before actually writing to it. */
	snd_emu10k1_ptr20_write(emu, 0x13, channel, 0);
	snd_emu10k1_ptr20_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
	snd_emu10k1_ptr20_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes
	snd_emu10k1_ptr20_write(emu, CAPTURE_POINTER, channel, 0);
	//snd_emu10k1_ptr20_write(emu, CAPTURE_SOURCE, 0x0, 0x333300e4); /* Select MIC or Line in */
	//snd_emu10k1_ptr20_write(emu, EXTENDED_INT_MASK, 0, snd_emu10k1_ptr20_read(emu, EXTENDED_INT_MASK, 0) | (0x110000<<channel));

	return 0;
}

static void snd_p16v_intr_enable(struct snd_emu10k1 *emu, unsigned int intrenb)
{
	unsigned long flags;
	unsigned int enable;

	spin_lock_irqsave(&emu->emu_lock, flags);
	enable = inl(emu->port + INTE2) | intrenb;
	outl(enable, emu->port + INTE2);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
}

static void snd_p16v_intr_disable(struct snd_emu10k1 *emu, unsigned int intrenb)
{
	unsigned long flags;
	unsigned int disable;

	spin_lock_irqsave(&emu->emu_lock, flags);
	disable = inl(emu->port + INTE2) & (~intrenb);
	outl(disable, emu->port + INTE2);
	spin_unlock_irqrestore(&emu->emu_lock, flags);
}

/* trigger_playback callback */
static int snd_p16v_pcm_trigger_playback(struct snd_pcm_substream *substream,
				    int cmd)
{
	struct snd_emu10k1 *emu = snd_pcm_substream_chip(substream);
	struct snd_pcm_runtime *runtime;
	struct snd_emu10k1_pcm *epcm;
	int channel;
	int result = 0;
	struct list_head *pos;
        struct snd_pcm_substream *s;
	u32 basic = 0;