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linux/sound/pci/ad1889.c

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/* Analog Devices 1889 audio driver
*
* This is a driver for the AD1889 PCI audio chipset found
* on the HP PA-RISC [BCJ]-xxx0 workstations.
*
* Copyright (C) 2004-2005, Kyle McMartin <kyle@parisc-linux.org>
* Copyright (C) 2005, Thibaut Varene <varenet@parisc-linux.org>
* Based on the OSS AD1889 driver by Randolph Chung <tausq@debian.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* TODO:
* Do we need to take care of CCS register?
* Maybe we could use finer grained locking (separate locks for pb/cap)?
* Wishlist:
* Control Interface (mixer) support
* Better AC97 support (VSR...)?
* PM support
* MIDI support
* Game Port support
* SG DMA support (this will need *alot* of work)
*/
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/compiler.h>
#include <linux/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/ac97_codec.h>
#include <asm/io.h>
#include "ad1889.h"
#include "ac97/ac97_id.h"
#define AD1889_DRVVER "Version: 1.7"
MODULE_AUTHOR("Kyle McMartin <kyle@parisc-linux.org>, Thibaut Varene <t-bone@parisc-linux.org>");
MODULE_DESCRIPTION("Analog Devices AD1889 ALSA sound driver");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Analog Devices,AD1889}}");
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for the AD1889 soundcard.");
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for the AD1889 soundcard.");
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable AD1889 soundcard.");
static char *ac97_quirk[SNDRV_CARDS];
module_param_array(ac97_quirk, charp, NULL, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
#define DEVNAME "ad1889"
#define PFX DEVNAME ": "
/* let's use the global sound debug interfaces */
#define ad1889_debug(fmt, arg...) snd_printd(KERN_DEBUG fmt, ## arg)
/* keep track of some hw registers */
struct ad1889_register_state {
u16 reg; /* reg setup */
u32 addr; /* dma base address */
unsigned long size; /* DMA buffer size */
};
struct snd_ad1889 {
struct snd_card *card;
struct pci_dev *pci;
int irq;
unsigned long bar;
void __iomem *iobase;
struct snd_ac97 *ac97;
struct snd_ac97_bus *ac97_bus;
struct snd_pcm *pcm;
struct snd_info_entry *proc;
struct snd_pcm_substream *psubs;
struct snd_pcm_substream *csubs;
/* playback register state */
struct ad1889_register_state wave;
struct ad1889_register_state ramc;
spinlock_t lock;
};
static inline u16
ad1889_readw(struct snd_ad1889 *chip, unsigned reg)
{
return readw(chip->iobase + reg);
}
static inline void
ad1889_writew(struct snd_ad1889 *chip, unsigned reg, u16 val)
{
writew(val, chip->iobase + reg);
}
static inline u32
ad1889_readl(struct snd_ad1889 *chip, unsigned reg)
{
return readl(chip->iobase + reg);
}
static inline void
ad1889_writel(struct snd_ad1889 *chip, unsigned reg, u32 val)
{
writel(val, chip->iobase + reg);
}
static inline void
ad1889_unmute(struct snd_ad1889 *chip)
{
u16 st;
st = ad1889_readw(chip, AD_DS_WADA) &
~(AD_DS_WADA_RWAM | AD_DS_WADA_LWAM);
ad1889_writew(chip, AD_DS_WADA, st);
ad1889_readw(chip, AD_DS_WADA);
}
static inline void
ad1889_mute(struct snd_ad1889 *chip)
{
u16 st;
st = ad1889_readw(chip, AD_DS_WADA) | AD_DS_WADA_RWAM | AD_DS_WADA_LWAM;
ad1889_writew(chip, AD_DS_WADA, st);
ad1889_readw(chip, AD_DS_WADA);
}
static inline void
ad1889_load_adc_buffer_address(struct snd_ad1889 *chip, u32 address)
{
ad1889_writel(chip, AD_DMA_ADCBA, address);
ad1889_writel(chip, AD_DMA_ADCCA, address);
}
static inline void
ad1889_load_adc_buffer_count(struct snd_ad1889 *chip, u32 count)
{
ad1889_writel(chip, AD_DMA_ADCBC, count);
ad1889_writel(chip, AD_DMA_ADCCC, count);
}
static inline void
ad1889_load_adc_interrupt_count(struct snd_ad1889 *chip, u32 count)
{
ad1889_writel(chip, AD_DMA_ADCIB, count);
ad1889_writel(chip, AD_DMA_ADCIC, count);
}
static inline void
ad1889_load_wave_buffer_address(struct snd_ad1889 *chip, u32 address)
{
ad1889_writel(chip, AD_DMA_WAVBA, address);
ad1889_writel(chip, AD_DMA_WAVCA, address);
}
static inline void
ad1889_load_wave_buffer_count(struct snd_ad1889 *chip, u32 count)
{
ad1889_writel(chip, AD_DMA_WAVBC, count);
ad1889_writel(chip, AD_DMA_WAVCC, count);
}
static inline void
ad1889_load_wave_interrupt_count(struct snd_ad1889 *chip, u32 count)
{
ad1889_writel(chip, AD_DMA_WAVIB, count);
ad1889_writel(chip, AD_DMA_WAVIC, count);
}
static void
ad1889_channel_reset(struct snd_ad1889 *chip, unsigned int channel)
{
u16 reg;
if (channel & AD_CHAN_WAV) {
/* Disable wave channel */
reg = ad1889_readw(chip, AD_DS_WSMC) & ~AD_DS_WSMC_WAEN;
ad1889_writew(chip, AD_DS_WSMC, reg);
chip->wave.reg = reg;
/* disable IRQs */
reg = ad1889_readw(chip, AD_DMA_WAV);
reg &= AD_DMA_IM_DIS;
reg &= ~AD_DMA_LOOP;
ad1889_writew(chip, AD_DMA_WAV, reg);
/* clear IRQ and address counters and pointers */
ad1889_load_wave_buffer_address(chip, 0x0);
ad1889_load_wave_buffer_count(chip, 0x0);
ad1889_load_wave_interrupt_count(chip, 0x0);
/* flush */
ad1889_readw(chip, AD_DMA_WAV);
}
if (channel & AD_CHAN_ADC) {
/* Disable ADC channel */
reg = ad1889_readw(chip, AD_DS_RAMC) & ~AD_DS_RAMC_ADEN;
ad1889_writew(chip, AD_DS_RAMC, reg);
chip->ramc.reg = reg;
reg = ad1889_readw(chip, AD_DMA_ADC);
reg &= AD_DMA_IM_DIS;
reg &= ~AD_DMA_LOOP;
ad1889_writew(chip, AD_DMA_ADC, reg);
ad1889_load_adc_buffer_address(chip, 0x0);
ad1889_load_adc_buffer_count(chip, 0x0);
ad1889_load_adc_interrupt_count(chip, 0x0);
/* flush */
ad1889_readw(chip, AD_DMA_ADC);
}
}
static u16
snd_ad1889_ac97_read(struct snd_ac97 *ac97, unsigned short reg)
{
struct snd_ad1889 *chip = ac97->private_data;
return ad1889_readw(chip, AD_AC97_BASE + reg);
}
static void
snd_ad1889_ac97_write(struct snd_ac97 *ac97, unsigned short reg, unsigned short val)
{
struct snd_ad1889 *chip = ac97->private_data;
ad1889_writew(chip, AD_AC97_BASE + reg, val);
}
static int
snd_ad1889_ac97_ready(struct snd_ad1889 *chip)
{
int retry = 400; /* average needs 352 msec */
while (!(ad1889_readw(chip, AD_AC97_ACIC) & AD_AC97_ACIC_ACRDY)
&& --retry)
mdelay(1);
if (!retry) {
snd_printk(KERN_ERR PFX "[%s] Link is not ready.\n",
__func__);
return -EIO;
}
ad1889_debug("[%s] ready after %d ms\n", __func__, 400 - retry);
return 0;
}
static int
snd_ad1889_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
return snd_pcm_lib_malloc_pages(substream,
params_buffer_bytes(hw_params));
}
static int
snd_ad1889_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
static struct snd_pcm_hardware snd_ad1889_playback_hw = {
.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
.rate_min = 8000, /* docs say 7000, but we're lazy */
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = BUFFER_BYTES_MAX,
.period_bytes_min = PERIOD_BYTES_MIN,
.period_bytes_max = PERIOD_BYTES_MAX,
.periods_min = PERIODS_MIN,
.periods_max = PERIODS_MAX,
/*.fifo_size = 0,*/
};
static struct snd_pcm_hardware snd_ad1889_capture_hw = {
.info = SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_MMAP_VALID | SNDRV_PCM_INFO_BLOCK_TRANSFER,
.formats = SNDRV_PCM_FMTBIT_S16_LE,
.rates = SNDRV_PCM_RATE_48000,
.rate_min = 48000, /* docs say we could to VSR, but we're lazy */
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = BUFFER_BYTES_MAX,
.period_bytes_min = PERIOD_BYTES_MIN,
.period_bytes_max = PERIOD_BYTES_MAX,
.periods_min = PERIODS_MIN,
.periods_max = PERIODS_MAX,
/*.fifo_size = 0,*/
};
static int
snd_ad1889_playback_open(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
struct snd_pcm_runtime *rt = ss->runtime;
chip->psubs = ss;
rt->hw = snd_ad1889_playback_hw;
return 0;
}
static int
snd_ad1889_capture_open(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
struct snd_pcm_runtime *rt = ss->runtime;
chip->csubs = ss;
rt->hw = snd_ad1889_capture_hw;
return 0;
}
static int
snd_ad1889_playback_close(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
chip->psubs = NULL;
return 0;
}
static int
snd_ad1889_capture_close(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
chip->csubs = NULL;
return 0;
}
static int
snd_ad1889_playback_prepare(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
struct snd_pcm_runtime *rt = ss->runtime;
unsigned int size = snd_pcm_lib_buffer_bytes(ss);
unsigned int count = snd_pcm_lib_period_bytes(ss);
u16 reg;
ad1889_channel_reset(chip, AD_CHAN_WAV);
reg = ad1889_readw(chip, AD_DS_WSMC);
/* Mask out 16-bit / Stereo */
reg &= ~(AD_DS_WSMC_WA16 | AD_DS_WSMC_WAST);
if (snd_pcm_format_width(rt->format) == 16)
reg |= AD_DS_WSMC_WA16;
if (rt->channels > 1)
reg |= AD_DS_WSMC_WAST;
/* let's make sure we don't clobber ourselves */
spin_lock_irq(&chip->lock);
chip->wave.size = size;
chip->wave.reg = reg;
chip->wave.addr = rt->dma_addr;
ad1889_writew(chip, AD_DS_WSMC, chip->wave.reg);
/* Set sample rates on the codec */
ad1889_writew(chip, AD_DS_WAS, rt->rate);
/* Set up DMA */
ad1889_load_wave_buffer_address(chip, chip->wave.addr);
ad1889_load_wave_buffer_count(chip, size);
ad1889_load_wave_interrupt_count(chip, count);
/* writes flush */
ad1889_readw(chip, AD_DS_WSMC);
spin_unlock_irq(&chip->lock);
ad1889_debug("prepare playback: addr = 0x%x, count = %u, "
"size = %u, reg = 0x%x, rate = %u\n", chip->wave.addr,
count, size, reg, rt->rate);
return 0;
}
static int
snd_ad1889_capture_prepare(struct snd_pcm_substream *ss)
{
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
struct snd_pcm_runtime *rt = ss->runtime;
unsigned int size = snd_pcm_lib_buffer_bytes(ss);
unsigned int count = snd_pcm_lib_period_bytes(ss);
u16 reg;
ad1889_channel_reset(chip, AD_CHAN_ADC);
reg = ad1889_readw(chip, AD_DS_RAMC);
/* Mask out 16-bit / Stereo */
reg &= ~(AD_DS_RAMC_AD16 | AD_DS_RAMC_ADST);
if (snd_pcm_format_width(rt->format) == 16)
reg |= AD_DS_RAMC_AD16;
if (rt->channels > 1)
reg |= AD_DS_RAMC_ADST;
/* let's make sure we don't clobber ourselves */
spin_lock_irq(&chip->lock);
chip->ramc.size = size;
chip->ramc.reg = reg;
chip->ramc.addr = rt->dma_addr;
ad1889_writew(chip, AD_DS_RAMC, chip->ramc.reg);
/* Set up DMA */
ad1889_load_adc_buffer_address(chip, chip->ramc.addr);
ad1889_load_adc_buffer_count(chip, size);
ad1889_load_adc_interrupt_count(chip, count);
/* writes flush */
ad1889_readw(chip, AD_DS_RAMC);
spin_unlock_irq(&chip->lock);
ad1889_debug("prepare capture: addr = 0x%x, count = %u, "
"size = %u, reg = 0x%x, rate = %u\n", chip->ramc.addr,
count, size, reg, rt->rate);
return 0;
}
/* this is called in atomic context with IRQ disabled.
Must be as fast as possible and not sleep.
DMA should be *triggered* by this call.
The WSMC "WAEN" bit triggers DMA Wave On/Off */
static int
snd_ad1889_playback_trigger(struct snd_pcm_substream *ss, int cmd)
{
u16 wsmc;
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
wsmc = ad1889_readw(chip, AD_DS_WSMC);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
/* enable DMA loop & interrupts */
ad1889_writew(chip, AD_DMA_WAV, AD_DMA_LOOP | AD_DMA_IM_CNT);
wsmc |= AD_DS_WSMC_WAEN;
/* 1 to clear CHSS bit */
ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_WAVS);
ad1889_unmute(chip);
break;
case SNDRV_PCM_TRIGGER_STOP:
ad1889_mute(chip);
wsmc &= ~AD_DS_WSMC_WAEN;
break;
default:
snd_BUG();
return -EINVAL;
}
chip->wave.reg = wsmc;
ad1889_writew(chip, AD_DS_WSMC, wsmc);
ad1889_readw(chip, AD_DS_WSMC); /* flush */
/* reset the chip when STOP - will disable IRQs */
if (cmd == SNDRV_PCM_TRIGGER_STOP)
ad1889_channel_reset(chip, AD_CHAN_WAV);
return 0;
}
/* this is called in atomic context with IRQ disabled.
Must be as fast as possible and not sleep.
DMA should be *triggered* by this call.
The RAMC "ADEN" bit triggers DMA ADC On/Off */
static int
snd_ad1889_capture_trigger(struct snd_pcm_substream *ss, int cmd)
{
u16 ramc;
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
ramc = ad1889_readw(chip, AD_DS_RAMC);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
/* enable DMA loop & interrupts */
ad1889_writew(chip, AD_DMA_ADC, AD_DMA_LOOP | AD_DMA_IM_CNT);
ramc |= AD_DS_RAMC_ADEN;
/* 1 to clear CHSS bit */
ad1889_writel(chip, AD_DMA_CHSS, AD_DMA_CHSS_ADCS);
break;
case SNDRV_PCM_TRIGGER_STOP:
ramc &= ~AD_DS_RAMC_ADEN;
break;
default:
return -EINVAL;
}
chip->ramc.reg = ramc;
ad1889_writew(chip, AD_DS_RAMC, ramc);
ad1889_readw(chip, AD_DS_RAMC); /* flush */
/* reset the chip when STOP - will disable IRQs */
if (cmd == SNDRV_PCM_TRIGGER_STOP)
ad1889_channel_reset(chip, AD_CHAN_ADC);
return 0;
}
/* Called in atomic context with IRQ disabled */
static snd_pcm_uframes_t
snd_ad1889_playback_pointer(struct snd_pcm_substream *ss)
{
size_t ptr = 0;
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
if (unlikely(!(chip->wave.reg & AD_DS_WSMC_WAEN)))
return 0;
ptr = ad1889_readl(chip, AD_DMA_WAVCA);
ptr -= chip->wave.addr;
if (snd_BUG_ON(ptr >= chip->wave.size))
return 0;
return bytes_to_frames(ss->runtime, ptr);
}
/* Called in atomic context with IRQ disabled */
static snd_pcm_uframes_t
snd_ad1889_capture_pointer(struct snd_pcm_substream *ss)
{
size_t ptr = 0;
struct snd_ad1889 *chip = snd_pcm_substream_chip(ss);
if (unlikely(!(chip->ramc.reg & AD_DS_RAMC_ADEN)))
return 0;
ptr = ad1889_readl(chip, AD_DMA_ADCCA);
ptr -= chip->ramc.addr;
if (snd_BUG_ON(ptr >= chip->ramc.size))
return 0;
return bytes_to_frames(ss->runtime, ptr);
}
static struct snd_pcm_ops snd_ad1889_playback_ops = {
.open = snd_ad1889_playback_open,
.close = snd_ad1889_playback_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_ad1889_hw_params,
.hw_free = snd_ad1889_hw_free,
.prepare = snd_ad1889_playback_prepare,
.trigger = snd_ad1889_playback_trigger,
.pointer = snd_ad1889_playback_pointer,
};
static struct snd_pcm_ops snd_ad1889_capture_ops = {
.open = snd_ad1889_capture_open,
.close = snd_ad1889_capture_close,
.ioctl = snd_pcm_lib_ioctl,
.hw_params = snd_ad1889_hw_params,
.hw_free = snd_ad1889_hw_free,
.prepare = snd_ad1889_capture_prepare,
.trigger = snd_ad1889_capture_trigger,
.pointer = snd_ad1889_capture_pointer,
};
static irqreturn_t
snd_ad1889_interrupt(int irq, void *dev_id)
{
unsigned long st;
struct snd_ad1889 *chip = dev_id;
st = ad1889_readl(chip, AD_DMA_DISR);
/* clear ISR */
ad1889_writel(chip, AD_DMA_DISR, st);
st &= AD_INTR_MASK;
if (unlikely(!st))
return IRQ_NONE;
if (st & (AD_DMA_DISR_PMAI|AD_DMA_DISR_PTAI))
ad1889_debug("Unexpected master or target abort interrupt!\n");
if ((st & AD_DMA_DISR_WAVI) && chip->psubs)
snd_pcm_period_elapsed(chip->psubs);
if ((st & AD_DMA_DISR_ADCI) && chip->csubs)
snd_pcm_period_elapsed(chip->csubs);
return IRQ_HANDLED;
}
static int __devinit
snd_ad1889_pcm_init(struct snd_ad1889 *chip, int device, struct snd_pcm **rpcm)
{
int err;
struct snd_pcm *pcm;
if (rpcm)
*rpcm = NULL;
err = snd_pcm_new(chip->card, chip->card->driver, device, 1, 1, &pcm);
if (err < 0)
return err;
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
&snd_ad1889_playback_ops);
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
&snd_ad1889_capture_ops);
pcm->private_data = chip;
pcm->info_flags = 0;
strcpy(pcm->name, chip->card->shortname);
chip->pcm = pcm;
chip->psubs = NULL;
chip->csubs = NULL;
err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
snd_dma_pci_data(chip->pci),
BUFFER_BYTES_MAX / 2,
BUFFER_BYTES_MAX);
if (err < 0) {
snd_printk(KERN_ERR PFX "buffer allocation error: %d\n", err);
return err;
}
if (rpcm)
*rpcm = pcm;
return 0;
}
static void
snd_ad1889_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
struct snd_ad1889 *chip = entry->private_data;
u16 reg;
int tmp;
reg = ad1889_readw(chip, AD_DS_WSMC);
snd_iprintf(buffer, "Wave output: %s\n",
(reg & AD_DS_WSMC_WAEN) ? "enabled" : "disabled");
snd_iprintf(buffer, "Wave Channels: %s\n",
(reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
snd_iprintf(buffer, "Wave Quality: %d-bit linear\n",
(reg & AD_DS_WSMC_WA16) ? 16 : 8);
/* WARQ is at offset 12 */
tmp = (reg & AD_DS_WSMC_WARQ) ?
(((reg & AD_DS_WSMC_WARQ >> 12) & 0x01) ? 12 : 18) : 4;
tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
snd_iprintf(buffer, "Wave FIFO: %d %s words\n\n", tmp,
(reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
snd_iprintf(buffer, "Synthesis output: %s\n",
reg & AD_DS_WSMC_SYEN ? "enabled" : "disabled");
/* SYRQ is at offset 4 */
tmp = (reg & AD_DS_WSMC_SYRQ) ?
(((reg & AD_DS_WSMC_SYRQ >> 4) & 0x01) ? 12 : 18) : 4;
tmp /= (reg & AD_DS_WSMC_WAST) ? 2 : 1;
snd_iprintf(buffer, "Synthesis FIFO: %d %s words\n\n", tmp,
(reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
reg = ad1889_readw(chip, AD_DS_RAMC);
snd_iprintf(buffer, "ADC input: %s\n",
(reg & AD_DS_RAMC_ADEN) ? "enabled" : "disabled");
snd_iprintf(buffer, "ADC Channels: %s\n",
(reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
snd_iprintf(buffer, "ADC Quality: %d-bit linear\n",
(reg & AD_DS_RAMC_AD16) ? 16 : 8);
/* ACRQ is at offset 4 */
tmp = (reg & AD_DS_RAMC_ACRQ) ?
(((reg & AD_DS_RAMC_ACRQ >> 4) & 0x01) ? 12 : 18) : 4;
tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
snd_iprintf(buffer, "ADC FIFO: %d %s words\n\n", tmp,
(reg & AD_DS_RAMC_ADST) ? "stereo" : "mono");
snd_iprintf(buffer, "Resampler input: %s\n",
reg & AD_DS_RAMC_REEN ? "enabled" : "disabled");
/* RERQ is at offset 12 */
tmp = (reg & AD_DS_RAMC_RERQ) ?
(((reg & AD_DS_RAMC_RERQ >> 12) & 0x01) ? 12 : 18) : 4;
tmp /= (reg & AD_DS_RAMC_ADST) ? 2 : 1;
snd_iprintf(buffer, "Resampler FIFO: %d %s words\n\n", tmp,
(reg & AD_DS_WSMC_WAST) ? "stereo" : "mono");
/* doc says LSB represents -1.5dB, but the max value (-94.5dB)
suggests that LSB is -3dB, which is more coherent with the logarithmic
nature of the dB scale */
reg = ad1889_readw(chip, AD_DS_WADA);
snd_iprintf(buffer, "Left: %s, -%d dB\n",
(reg & AD_DS_WADA_LWAM) ? "mute" : "unmute",
((reg & AD_DS_WADA_LWAA) >> 8) * 3);
reg = ad1889_readw(chip, AD_DS_WADA);
snd_iprintf(buffer, "Right: %s, -%d dB\n",
(reg & AD_DS_WADA_RWAM) ? "mute" : "unmute",
((reg & AD_DS_WADA_RWAA) >> 8) * 3);
reg = ad1889_readw(chip, AD_DS_WAS);
snd_iprintf(buffer, "Wave samplerate: %u Hz\n", reg);
reg = ad1889_readw(chip, AD_DS_RES);
snd_iprintf(buffer, "Resampler samplerate: %u Hz\n", reg);
}
static void __devinit
snd_ad1889_proc_init(struct snd_ad1889 *chip)
{
struct snd_info_entry *entry;
if (!snd_card_proc_new(chip->card, chip->card->driver, &entry))
snd_info_set_text_ops(entry, chip, snd_ad1889_proc_read);
}
static struct ac97_quirk ac97_quirks[] = {
{
.subvendor = 0x11d4, /* AD */
.subdevice = 0x1889, /* AD1889 */
.codec_id = AC97_ID_AD1819,
.name = "AD1889",
.type = AC97_TUNE_HP_ONLY
},
{ } /* terminator */
};
static void __devinit
snd_ad1889_ac97_xinit(struct snd_ad1889 *chip)
{
u16 reg;
reg = ad1889_readw(chip, AD_AC97_ACIC);
reg |= AD_AC97_ACIC_ACRD; /* Reset Disable */
ad1889_writew(chip, AD_AC97_ACIC, reg);
ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
udelay(10);
/* Interface Enable */
reg |= AD_AC97_ACIC_ACIE;
ad1889_writew(chip, AD_AC97_ACIC, reg);
snd_ad1889_ac97_ready(chip);
/* Audio Stream Output | Variable Sample Rate Mode */
reg = ad1889_readw(chip, AD_AC97_ACIC);
reg |= AD_AC97_ACIC_ASOE | AD_AC97_ACIC_VSRM;
ad1889_writew(chip, AD_AC97_ACIC, reg);
ad1889_readw(chip, AD_AC97_ACIC); /* flush posted write */
}
static void
snd_ad1889_ac97_bus_free(struct snd_ac97_bus *bus)
{
struct snd_ad1889 *chip = bus->private_data;
chip->ac97_bus = NULL;
}
static void
snd_ad1889_ac97_free(struct snd_ac97 *ac97)
{
struct snd_ad1889 *chip = ac97->private_data;
chip->ac97 = NULL;
}
static int __devinit
snd_ad1889_ac97_init(struct snd_ad1889 *chip, const char *quirk_override)
{
int err;
struct snd_ac97_template ac97;
static struct snd_ac97_bus_ops ops = {
.write = snd_ad1889_ac97_write,
.read = snd_ad1889_ac97_read,
};
/* doing that here, it works. */
snd_ad1889_ac97_xinit(chip);
err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
if (err < 0)
return err;
chip->ac97_bus->private_free = snd_ad1889_ac97_bus_free;
memset(&ac97, 0, sizeof(ac97));
ac97.private_data = chip;
ac97.private_free = snd_ad1889_ac97_free;
ac97.pci = chip->pci;
err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
if (err < 0)
return err;
snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);
return 0;
}
static int
snd_ad1889_free(struct snd_ad1889 *chip)
{
if (chip->irq < 0)
goto skip_hw;
spin_lock_irq(&chip->lock);
ad1889_mute(chip);
/* Turn off interrupt on count and zero DMA registers */
ad1889_channel_reset(chip, AD_CHAN_WAV | AD_CHAN_ADC);
/* clear DISR. If we don't, we'd better jump off the Eiffel Tower */
ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PTAI | AD_DMA_DISR_PMAI);
ad1889_readl(chip, AD_DMA_DISR); /* flush, dammit! */
spin_unlock_irq(&chip->lock);
if (chip->irq >= 0)
free_irq(chip->irq, chip);
skip_hw:
if (chip->iobase)
iounmap(chip->iobase);
pci_release_regions(chip->pci);
pci_disable_device(chip->pci);
kfree(chip);
return 0;
}
static int
snd_ad1889_dev_free(struct snd_device *device)
{
struct snd_ad1889 *chip = device->device_data;
return snd_ad1889_free(chip);
}
static int __devinit
snd_ad1889_init(struct snd_ad1889 *chip)
{
ad1889_writew(chip, AD_DS_CCS, AD_DS_CCS_CLKEN); /* turn on clock */
ad1889_readw(chip, AD_DS_CCS); /* flush posted write */
mdelay(10);
/* enable Master and Target abort interrupts */
ad1889_writel(chip, AD_DMA_DISR, AD_DMA_DISR_PMAE | AD_DMA_DISR_PTAE);
return 0;
}
static int __devinit
snd_ad1889_create(struct snd_card *card,
struct pci_dev *pci,
struct snd_ad1889 **rchip)
{
int err;
struct snd_ad1889 *chip;
static struct snd_device_ops ops = {
.dev_free = snd_ad1889_dev_free,
};
*rchip = NULL;
if ((err = pci_enable_device(pci)) < 0)
return err;
/* check PCI availability (32bit DMA) */
if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
printk(KERN_ERR PFX "error setting 32-bit DMA mask.\n");
pci_disable_device(pci);
return -ENXIO;
}
/* allocate chip specific data with zero-filled memory */
if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
pci_disable_device(pci);
return -ENOMEM;
}
chip->card = card;
card->private_data = chip;
chip->pci = pci;
chip->irq = -1;
/* (1) PCI resource allocation */
if ((err = pci_request_regions(pci, card->driver)) < 0)
goto free_and_ret;
chip->bar = pci_resource_start(pci, 0);
chip->iobase = pci_ioremap_bar(pci, 0);
if (chip->iobase == NULL) {
printk(KERN_ERR PFX "unable to reserve region.\n");
err = -EBUSY;
goto free_and_ret;
}
pci_set_master(pci);
spin_lock_init(&chip->lock); /* only now can we call ad1889_free */
if (request_irq(pci->irq, snd_ad1889_interrupt,
IRQF_SHARED, card->driver, chip)) {
printk(KERN_ERR PFX "cannot obtain IRQ %d\n", pci->irq);
snd_ad1889_free(chip);
return -EBUSY;
}
chip->irq = pci->irq;
synchronize_irq(chip->irq);
/* (2) initialization of the chip hardware */
if ((err = snd_ad1889_init(chip)) < 0) {
snd_ad1889_free(chip);
return err;
}
if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
snd_ad1889_free(chip);
return err;
}
snd_card_set_dev(card, &pci->dev);
*rchip = chip;
return 0;
free_and_ret:
kfree(chip);
pci_disable_device(pci);
return err;
}
static int __devinit
snd_ad1889_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
int err;
static int devno;
struct snd_card *card;
struct snd_ad1889 *chip;
/* (1) */
if (devno >= SNDRV_CARDS)
return -ENODEV;
if (!enable[devno]) {
devno++;
return -ENOENT;
}
/* (2) */
card = snd_card_new(index[devno], id[devno], THIS_MODULE, 0);
/* XXX REVISIT: we can probably allocate chip in this call */
if (card == NULL)
return -ENOMEM;
strcpy(card->driver, "AD1889");
strcpy(card->shortname, "Analog Devices AD1889");
/* (3) */
err = snd_ad1889_create(card, pci, &chip);
if (err < 0)
goto free_and_ret;
/* (4) */
sprintf(card->longname, "%s at 0x%lx irq %i",
card->shortname, chip->bar, chip->irq);
/* (5) */
/* register AC97 mixer */
err = snd_ad1889_ac97_init(chip, ac97_quirk[devno]);
if (err < 0)
goto free_and_ret;
err = snd_ad1889_pcm_init(chip, 0, NULL);
if (err < 0)
goto free_and_ret;
/* register proc interface */
snd_ad1889_proc_init(chip);
/* (6) */
err = snd_card_register(card);
if (err < 0)
goto free_and_ret;
/* (7) */
pci_set_drvdata(pci, card);
devno++;
return 0;
free_and_ret:
snd_card_free(card);
return err;
}
static void __devexit
snd_ad1889_remove(struct pci_dev *pci)
{
snd_card_free(pci_get_drvdata(pci));
pci_set_drvdata(pci, NULL);
}
static struct pci_device_id snd_ad1889_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_ANALOG_DEVICES, PCI_DEVICE_ID_AD1889JS) },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, snd_ad1889_ids);
static struct pci_driver ad1889_pci_driver = {
.name = "AD1889 Audio",
.id_table = snd_ad1889_ids,
.probe = snd_ad1889_probe,
.remove = __devexit_p(snd_ad1889_remove),
};
static int __init
alsa_ad1889_init(void)
{
return pci_register_driver(&ad1889_pci_driver);
}
static void __exit
alsa_ad1889_fini(void)
{
pci_unregister_driver(&ad1889_pci_driver);
}
module_init(alsa_ad1889_init);
module_exit(alsa_ad1889_fini);
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