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es1938.c
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es1938.c
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/*
* Driver for ESS Solo-1 (ES1938, ES1946, ES1969) soundcard
* Copyright (c) by Jaromir Koutek <[email protected]>,
* Jaroslav Kysela <[email protected]>,
* Thomas Sailer <[email protected]>,
* Abramo Bagnara <[email protected]>,
* Markus Gruber <[email protected]>
*
* Rewritten from sonicvibes.c source.
*
* TODO:
* Rewrite better spinlocks
*
*
* 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
*
*/
/*
NOTES:
- Capture data is written unaligned starting from dma_base + 1 so I need to
disable mmap and to add a copy callback.
- After several cycle of the following:
while : ; do arecord -d1 -f cd -t raw | aplay -f cd ; done
a "playback write error (DMA or IRQ trouble?)" may happen.
This is due to playback interrupts not generated.
I suspect a timing issue.
- Sometimes the interrupt handler is invoked wrongly during playback.
This generates some harmless "Unexpected hw_pointer: wrong interrupt
acknowledge".
I've seen that using small period sizes.
Reproducible with:
mpg123 test.mp3 &
hdparm -t -T /dev/hda
*/
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/gameport.h>
#include <linux/moduleparam.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <sound/core.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/opl3.h>
#include <sound/mpu401.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <asm/io.h>
MODULE_AUTHOR("Jaromir Koutek <[email protected]>");
MODULE_DESCRIPTION("ESS Solo-1");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{ESS,ES1938},"
"{ESS,ES1946},"
"{ESS,ES1969},"
"{TerraTec,128i PCI}}");
#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
#define SUPPORT_JOYSTICK 1
#endif
static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for ESS Solo-1 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for ESS Solo-1 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable ESS Solo-1 soundcard.");
#define SLIO_REG(chip, x) ((chip)->io_port + ESSIO_REG_##x)
#define SLDM_REG(chip, x) ((chip)->ddma_port + ESSDM_REG_##x)
#define SLSB_REG(chip, x) ((chip)->sb_port + ESSSB_REG_##x)
#define SL_PCI_LEGACYCONTROL 0x40
#define SL_PCI_CONFIG 0x50
#define SL_PCI_DDMACONTROL 0x60
#define ESSIO_REG_AUDIO2DMAADDR 0
#define ESSIO_REG_AUDIO2DMACOUNT 4
#define ESSIO_REG_AUDIO2MODE 6
#define ESSIO_REG_IRQCONTROL 7
#define ESSDM_REG_DMAADDR 0x00
#define ESSDM_REG_DMACOUNT 0x04
#define ESSDM_REG_DMACOMMAND 0x08
#define ESSDM_REG_DMASTATUS 0x08
#define ESSDM_REG_DMAMODE 0x0b
#define ESSDM_REG_DMACLEAR 0x0d
#define ESSDM_REG_DMAMASK 0x0f
#define ESSSB_REG_FMLOWADDR 0x00
#define ESSSB_REG_FMHIGHADDR 0x02
#define ESSSB_REG_MIXERADDR 0x04
#define ESSSB_REG_MIXERDATA 0x05
#define ESSSB_IREG_AUDIO1 0x14
#define ESSSB_IREG_MICMIX 0x1a
#define ESSSB_IREG_RECSRC 0x1c
#define ESSSB_IREG_MASTER 0x32
#define ESSSB_IREG_FM 0x36
#define ESSSB_IREG_AUXACD 0x38
#define ESSSB_IREG_AUXB 0x3a
#define ESSSB_IREG_PCSPEAKER 0x3c
#define ESSSB_IREG_LINE 0x3e
#define ESSSB_IREG_SPATCONTROL 0x50
#define ESSSB_IREG_SPATLEVEL 0x52
#define ESSSB_IREG_MASTER_LEFT 0x60
#define ESSSB_IREG_MASTER_RIGHT 0x62
#define ESSSB_IREG_MPU401CONTROL 0x64
#define ESSSB_IREG_MICMIXRECORD 0x68
#define ESSSB_IREG_AUDIO2RECORD 0x69
#define ESSSB_IREG_AUXACDRECORD 0x6a
#define ESSSB_IREG_FMRECORD 0x6b
#define ESSSB_IREG_AUXBRECORD 0x6c
#define ESSSB_IREG_MONO 0x6d
#define ESSSB_IREG_LINERECORD 0x6e
#define ESSSB_IREG_MONORECORD 0x6f
#define ESSSB_IREG_AUDIO2SAMPLE 0x70
#define ESSSB_IREG_AUDIO2MODE 0x71
#define ESSSB_IREG_AUDIO2FILTER 0x72
#define ESSSB_IREG_AUDIO2TCOUNTL 0x74
#define ESSSB_IREG_AUDIO2TCOUNTH 0x76
#define ESSSB_IREG_AUDIO2CONTROL1 0x78
#define ESSSB_IREG_AUDIO2CONTROL2 0x7a
#define ESSSB_IREG_AUDIO2 0x7c
#define ESSSB_REG_RESET 0x06
#define ESSSB_REG_READDATA 0x0a
#define ESSSB_REG_WRITEDATA 0x0c
#define ESSSB_REG_READSTATUS 0x0c
#define ESSSB_REG_STATUS 0x0e
#define ESS_CMD_EXTSAMPLERATE 0xa1
#define ESS_CMD_FILTERDIV 0xa2
#define ESS_CMD_DMACNTRELOADL 0xa4
#define ESS_CMD_DMACNTRELOADH 0xa5
#define ESS_CMD_ANALOGCONTROL 0xa8
#define ESS_CMD_IRQCONTROL 0xb1
#define ESS_CMD_DRQCONTROL 0xb2
#define ESS_CMD_RECLEVEL 0xb4
#define ESS_CMD_SETFORMAT 0xb6
#define ESS_CMD_SETFORMAT2 0xb7
#define ESS_CMD_DMACONTROL 0xb8
#define ESS_CMD_DMATYPE 0xb9
#define ESS_CMD_OFFSETLEFT 0xba
#define ESS_CMD_OFFSETRIGHT 0xbb
#define ESS_CMD_READREG 0xc0
#define ESS_CMD_ENABLEEXT 0xc6
#define ESS_CMD_PAUSEDMA 0xd0
#define ESS_CMD_ENABLEAUDIO1 0xd1
#define ESS_CMD_STOPAUDIO1 0xd3
#define ESS_CMD_AUDIO1STATUS 0xd8
#define ESS_CMD_CONTDMA 0xd4
#define ESS_CMD_TESTIRQ 0xf2
#define ESS_RECSRC_MIC 0
#define ESS_RECSRC_AUXACD 2
#define ESS_RECSRC_AUXB 5
#define ESS_RECSRC_LINE 6
#define ESS_RECSRC_NONE 7
#define DAC1 0x01
#define ADC1 0x02
#define DAC2 0x04
/*
*/
#define SAVED_REG_SIZE 32 /* max. number of registers to save */
struct es1938 {
int irq;
unsigned long io_port;
unsigned long sb_port;
unsigned long vc_port;
unsigned long mpu_port;
unsigned long game_port;
unsigned long ddma_port;
unsigned char irqmask;
unsigned char revision;
struct snd_kcontrol *hw_volume;
struct snd_kcontrol *hw_switch;
struct snd_kcontrol *master_volume;
struct snd_kcontrol *master_switch;
struct pci_dev *pci;
struct snd_card *card;
struct snd_pcm *pcm;
struct snd_pcm_substream *capture_substream;
struct snd_pcm_substream *playback1_substream;
struct snd_pcm_substream *playback2_substream;
struct snd_rawmidi *rmidi;
unsigned int dma1_size;
unsigned int dma2_size;
unsigned int dma1_start;
unsigned int dma2_start;
unsigned int dma1_shift;
unsigned int dma2_shift;
unsigned int last_capture_dmaaddr;
unsigned int active;
spinlock_t reg_lock;
spinlock_t mixer_lock;
struct snd_info_entry *proc_entry;
#ifdef SUPPORT_JOYSTICK
struct gameport *gameport;
#endif
#ifdef CONFIG_PM
unsigned char saved_regs[SAVED_REG_SIZE];
#endif
};
static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id);
static struct pci_device_id snd_es1938_ids[] = {
{ 0x125d, 0x1969, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0, }, /* Solo-1 */
{ 0, }
};
MODULE_DEVICE_TABLE(pci, snd_es1938_ids);
#define RESET_LOOP_TIMEOUT 0x10000
#define WRITE_LOOP_TIMEOUT 0x10000
#define GET_LOOP_TIMEOUT 0x01000
#undef REG_DEBUG
/* -----------------------------------------------------------------
* Write to a mixer register
* -----------------------------------------------------------------*/
static void snd_es1938_mixer_write(struct es1938 *chip, unsigned char reg, unsigned char val)
{
unsigned long flags;
spin_lock_irqsave(&chip->mixer_lock, flags);
outb(reg, SLSB_REG(chip, MIXERADDR));
outb(val, SLSB_REG(chip, MIXERDATA));
spin_unlock_irqrestore(&chip->mixer_lock, flags);
#ifdef REG_DEBUG
snd_printk(KERN_DEBUG "Mixer reg %02x set to %02x\n", reg, val);
#endif
}
/* -----------------------------------------------------------------
* Read from a mixer register
* -----------------------------------------------------------------*/
static int snd_es1938_mixer_read(struct es1938 *chip, unsigned char reg)
{
int data;
unsigned long flags;
spin_lock_irqsave(&chip->mixer_lock, flags);
outb(reg, SLSB_REG(chip, MIXERADDR));
data = inb(SLSB_REG(chip, MIXERDATA));
spin_unlock_irqrestore(&chip->mixer_lock, flags);
#ifdef REG_DEBUG
snd_printk(KERN_DEBUG "Mixer reg %02x now is %02x\n", reg, data);
#endif
return data;
}
/* -----------------------------------------------------------------
* Write to some bits of a mixer register (return old value)
* -----------------------------------------------------------------*/
static int snd_es1938_mixer_bits(struct es1938 *chip, unsigned char reg,
unsigned char mask, unsigned char val)
{
unsigned long flags;
unsigned char old, new, oval;
spin_lock_irqsave(&chip->mixer_lock, flags);
outb(reg, SLSB_REG(chip, MIXERADDR));
old = inb(SLSB_REG(chip, MIXERDATA));
oval = old & mask;
if (val != oval) {
new = (old & ~mask) | (val & mask);
outb(new, SLSB_REG(chip, MIXERDATA));
#ifdef REG_DEBUG
snd_printk(KERN_DEBUG "Mixer reg %02x was %02x, set to %02x\n",
reg, old, new);
#endif
}
spin_unlock_irqrestore(&chip->mixer_lock, flags);
return oval;
}
/* -----------------------------------------------------------------
* Write command to Controller Registers
* -----------------------------------------------------------------*/
static void snd_es1938_write_cmd(struct es1938 *chip, unsigned char cmd)
{
int i;
unsigned char v;
for (i = 0; i < WRITE_LOOP_TIMEOUT; i++) {
if (!(v = inb(SLSB_REG(chip, READSTATUS)) & 0x80)) {
outb(cmd, SLSB_REG(chip, WRITEDATA));
return;
}
}
printk(KERN_ERR "snd_es1938_write_cmd timeout (0x02%x/0x02%x)\n", cmd, v);
}
/* -----------------------------------------------------------------
* Read the Read Data Buffer
* -----------------------------------------------------------------*/
static int snd_es1938_get_byte(struct es1938 *chip)
{
int i;
unsigned char v;
for (i = GET_LOOP_TIMEOUT; i; i--)
if ((v = inb(SLSB_REG(chip, STATUS))) & 0x80)
return inb(SLSB_REG(chip, READDATA));
snd_printk(KERN_ERR "get_byte timeout: status 0x02%x\n", v);
return -ENODEV;
}
/* -----------------------------------------------------------------
* Write value cmd register
* -----------------------------------------------------------------*/
static void snd_es1938_write(struct es1938 *chip, unsigned char reg, unsigned char val)
{
unsigned long flags;
spin_lock_irqsave(&chip->reg_lock, flags);
snd_es1938_write_cmd(chip, reg);
snd_es1938_write_cmd(chip, val);
spin_unlock_irqrestore(&chip->reg_lock, flags);
#ifdef REG_DEBUG
snd_printk(KERN_DEBUG "Reg %02x set to %02x\n", reg, val);
#endif
}
/* -----------------------------------------------------------------
* Read data from cmd register and return it
* -----------------------------------------------------------------*/
static unsigned char snd_es1938_read(struct es1938 *chip, unsigned char reg)
{
unsigned char val;
unsigned long flags;
spin_lock_irqsave(&chip->reg_lock, flags);
snd_es1938_write_cmd(chip, ESS_CMD_READREG);
snd_es1938_write_cmd(chip, reg);
val = snd_es1938_get_byte(chip);
spin_unlock_irqrestore(&chip->reg_lock, flags);
#ifdef REG_DEBUG
snd_printk(KERN_DEBUG "Reg %02x now is %02x\n", reg, val);
#endif
return val;
}
/* -----------------------------------------------------------------
* Write data to cmd register and return old value
* -----------------------------------------------------------------*/
static int snd_es1938_bits(struct es1938 *chip, unsigned char reg, unsigned char mask,
unsigned char val)
{
unsigned long flags;
unsigned char old, new, oval;
spin_lock_irqsave(&chip->reg_lock, flags);
snd_es1938_write_cmd(chip, ESS_CMD_READREG);
snd_es1938_write_cmd(chip, reg);
old = snd_es1938_get_byte(chip);
oval = old & mask;
if (val != oval) {
snd_es1938_write_cmd(chip, reg);
new = (old & ~mask) | (val & mask);
snd_es1938_write_cmd(chip, new);
#ifdef REG_DEBUG
snd_printk(KERN_DEBUG "Reg %02x was %02x, set to %02x\n",
reg, old, new);
#endif
}
spin_unlock_irqrestore(&chip->reg_lock, flags);
return oval;
}
/* --------------------------------------------------------------------
* Reset the chip
* --------------------------------------------------------------------*/
static void snd_es1938_reset(struct es1938 *chip)
{
int i;
outb(3, SLSB_REG(chip, RESET));
inb(SLSB_REG(chip, RESET));
outb(0, SLSB_REG(chip, RESET));
for (i = 0; i < RESET_LOOP_TIMEOUT; i++) {
if (inb(SLSB_REG(chip, STATUS)) & 0x80) {
if (inb(SLSB_REG(chip, READDATA)) == 0xaa)
goto __next;
}
}
snd_printk(KERN_ERR "ESS Solo-1 reset failed\n");
__next:
snd_es1938_write_cmd(chip, ESS_CMD_ENABLEEXT);
/* Demand transfer DMA: 4 bytes per DMA request */
snd_es1938_write(chip, ESS_CMD_DMATYPE, 2);
/* Change behaviour of register A1
4x oversampling
2nd channel DAC asynchronous */
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2MODE, 0x32);
/* enable/select DMA channel and IRQ channel */
snd_es1938_bits(chip, ESS_CMD_IRQCONTROL, 0xf0, 0x50);
snd_es1938_bits(chip, ESS_CMD_DRQCONTROL, 0xf0, 0x50);
snd_es1938_write_cmd(chip, ESS_CMD_ENABLEAUDIO1);
/* Set spatializer parameters to recommended values */
snd_es1938_mixer_write(chip, 0x54, 0x8f);
snd_es1938_mixer_write(chip, 0x56, 0x95);
snd_es1938_mixer_write(chip, 0x58, 0x94);
snd_es1938_mixer_write(chip, 0x5a, 0x80);
}
/* --------------------------------------------------------------------
* Reset the FIFOs
* --------------------------------------------------------------------*/
static void snd_es1938_reset_fifo(struct es1938 *chip)
{
outb(2, SLSB_REG(chip, RESET));
outb(0, SLSB_REG(chip, RESET));
}
static struct snd_ratnum clocks[2] = {
{
.num = 793800,
.den_min = 1,
.den_max = 128,
.den_step = 1,
},
{
.num = 768000,
.den_min = 1,
.den_max = 128,
.den_step = 1,
}
};
static struct snd_pcm_hw_constraint_ratnums hw_constraints_clocks = {
.nrats = 2,
.rats = clocks,
};
static void snd_es1938_rate_set(struct es1938 *chip,
struct snd_pcm_substream *substream,
int mode)
{
unsigned int bits, div0;
struct snd_pcm_runtime *runtime = substream->runtime;
if (runtime->rate_num == clocks[0].num)
bits = 128 - runtime->rate_den;
else
bits = 256 - runtime->rate_den;
/* set filter register */
div0 = 256 - 7160000*20/(8*82*runtime->rate);
if (mode == DAC2) {
snd_es1938_mixer_write(chip, 0x70, bits);
snd_es1938_mixer_write(chip, 0x72, div0);
} else {
snd_es1938_write(chip, 0xA1, bits);
snd_es1938_write(chip, 0xA2, div0);
}
}
/* --------------------------------------------------------------------
* Configure Solo1 builtin DMA Controller
* --------------------------------------------------------------------*/
static void snd_es1938_playback1_setdma(struct es1938 *chip)
{
outb(0x00, SLIO_REG(chip, AUDIO2MODE));
outl(chip->dma2_start, SLIO_REG(chip, AUDIO2DMAADDR));
outw(0, SLIO_REG(chip, AUDIO2DMACOUNT));
outw(chip->dma2_size, SLIO_REG(chip, AUDIO2DMACOUNT));
}
static void snd_es1938_playback2_setdma(struct es1938 *chip)
{
/* Enable DMA controller */
outb(0xc4, SLDM_REG(chip, DMACOMMAND));
/* 1. Master reset */
outb(0, SLDM_REG(chip, DMACLEAR));
/* 2. Mask DMA */
outb(1, SLDM_REG(chip, DMAMASK));
outb(0x18, SLDM_REG(chip, DMAMODE));
outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
/* 3. Unmask DMA */
outb(0, SLDM_REG(chip, DMAMASK));
}
static void snd_es1938_capture_setdma(struct es1938 *chip)
{
/* Enable DMA controller */
outb(0xc4, SLDM_REG(chip, DMACOMMAND));
/* 1. Master reset */
outb(0, SLDM_REG(chip, DMACLEAR));
/* 2. Mask DMA */
outb(1, SLDM_REG(chip, DMAMASK));
outb(0x14, SLDM_REG(chip, DMAMODE));
outl(chip->dma1_start, SLDM_REG(chip, DMAADDR));
chip->last_capture_dmaaddr = chip->dma1_start;
outw(chip->dma1_size - 1, SLDM_REG(chip, DMACOUNT));
/* 3. Unmask DMA */
outb(0, SLDM_REG(chip, DMAMASK));
}
/* ----------------------------------------------------------------------
*
* *** PCM part ***
*/
static int snd_es1938_capture_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
int val;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
val = 0x0f;
chip->active |= ADC1;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
val = 0x00;
chip->active &= ~ADC1;
break;
default:
return -EINVAL;
}
snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
return 0;
}
static int snd_es1938_playback1_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
/* According to the documentation this should be:
0x13 but that value may randomly swap stereo channels */
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x92);
udelay(10);
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0x93);
/* This two stage init gives the FIFO -> DAC connection time to
* settle before first data from DMA flows in. This should ensure
* no swapping of stereo channels. Report a bug if otherwise :-) */
outb(0x0a, SLIO_REG(chip, AUDIO2MODE));
chip->active |= DAC2;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
outb(0, SLIO_REG(chip, AUDIO2MODE));
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL1, 0);
chip->active &= ~DAC2;
break;
default:
return -EINVAL;
}
return 0;
}
static int snd_es1938_playback2_trigger(struct snd_pcm_substream *substream,
int cmd)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
int val;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
val = 5;
chip->active |= DAC1;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
val = 0;
chip->active &= ~DAC1;
break;
default:
return -EINVAL;
}
snd_es1938_write(chip, ESS_CMD_DMACONTROL, val);
return 0;
}
static int snd_es1938_playback_trigger(struct snd_pcm_substream *substream,
int cmd)
{
switch (substream->number) {
case 0:
return snd_es1938_playback1_trigger(substream, cmd);
case 1:
return snd_es1938_playback2_trigger(substream, cmd);
}
snd_BUG();
return -EINVAL;
}
/* --------------------------------------------------------------------
* First channel for Extended Mode Audio 1 ADC Operation
* --------------------------------------------------------------------*/
static int snd_es1938_capture_prepare(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int u, is8, mono;
unsigned int size = snd_pcm_lib_buffer_bytes(substream);
unsigned int count = snd_pcm_lib_period_bytes(substream);
chip->dma1_size = size;
chip->dma1_start = runtime->dma_addr;
mono = (runtime->channels > 1) ? 0 : 1;
is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
u = snd_pcm_format_unsigned(runtime->format);
chip->dma1_shift = 2 - mono - is8;
snd_es1938_reset_fifo(chip);
/* program type */
snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
/* set clock and counters */
snd_es1938_rate_set(chip, substream, ADC1);
count = 0x10000 - count;
snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
/* initialize and configure ADC */
snd_es1938_write(chip, ESS_CMD_SETFORMAT2, u ? 0x51 : 0x71);
snd_es1938_write(chip, ESS_CMD_SETFORMAT2, 0x90 |
(u ? 0x00 : 0x20) |
(is8 ? 0x00 : 0x04) |
(mono ? 0x40 : 0x08));
// snd_es1938_reset_fifo(chip);
/* 11. configure system interrupt controller and DMA controller */
snd_es1938_capture_setdma(chip);
return 0;
}
/* ------------------------------------------------------------------------------
* Second Audio channel DAC Operation
* ------------------------------------------------------------------------------*/
static int snd_es1938_playback1_prepare(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int u, is8, mono;
unsigned int size = snd_pcm_lib_buffer_bytes(substream);
unsigned int count = snd_pcm_lib_period_bytes(substream);
chip->dma2_size = size;
chip->dma2_start = runtime->dma_addr;
mono = (runtime->channels > 1) ? 0 : 1;
is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
u = snd_pcm_format_unsigned(runtime->format);
chip->dma2_shift = 2 - mono - is8;
snd_es1938_reset_fifo(chip);
/* set clock and counters */
snd_es1938_rate_set(chip, substream, DAC2);
count >>= 1;
count = 0x10000 - count;
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTL, count & 0xff);
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2TCOUNTH, count >> 8);
/* initialize and configure Audio 2 DAC */
snd_es1938_mixer_write(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x40 | (u ? 0 : 4) |
(mono ? 0 : 2) | (is8 ? 0 : 1));
/* program DMA */
snd_es1938_playback1_setdma(chip);
return 0;
}
static int snd_es1938_playback2_prepare(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
int u, is8, mono;
unsigned int size = snd_pcm_lib_buffer_bytes(substream);
unsigned int count = snd_pcm_lib_period_bytes(substream);
chip->dma1_size = size;
chip->dma1_start = runtime->dma_addr;
mono = (runtime->channels > 1) ? 0 : 1;
is8 = snd_pcm_format_width(runtime->format) == 16 ? 0 : 1;
u = snd_pcm_format_unsigned(runtime->format);
chip->dma1_shift = 2 - mono - is8;
count = 0x10000 - count;
/* reset */
snd_es1938_reset_fifo(chip);
snd_es1938_bits(chip, ESS_CMD_ANALOGCONTROL, 0x03, (mono ? 2 : 1));
/* set clock and counters */
snd_es1938_rate_set(chip, substream, DAC1);
snd_es1938_write(chip, ESS_CMD_DMACNTRELOADL, count & 0xff);
snd_es1938_write(chip, ESS_CMD_DMACNTRELOADH, count >> 8);
/* initialized and configure DAC */
snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x80 : 0x00);
snd_es1938_write(chip, ESS_CMD_SETFORMAT, u ? 0x51 : 0x71);
snd_es1938_write(chip, ESS_CMD_SETFORMAT2,
0x90 | (mono ? 0x40 : 0x08) |
(is8 ? 0x00 : 0x04) | (u ? 0x00 : 0x20));
/* program DMA */
snd_es1938_playback2_setdma(chip);
return 0;
}
static int snd_es1938_playback_prepare(struct snd_pcm_substream *substream)
{
switch (substream->number) {
case 0:
return snd_es1938_playback1_prepare(substream);
case 1:
return snd_es1938_playback2_prepare(substream);
}
snd_BUG();
return -EINVAL;
}
/* during the incrementing of dma counters the DMA register reads sometimes
returns garbage. To ensure a valid hw pointer, the following checks which
should be very unlikely to fail are used:
- is the current DMA address in the valid DMA range ?
- is the sum of DMA address and DMA counter pointing to the last DMA byte ?
One can argue this could differ by one byte depending on which register is
updated first, so the implementation below allows for that.
*/
static snd_pcm_uframes_t snd_es1938_capture_pointer(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
size_t ptr;
#if 0
size_t old, new;
/* This stuff is *needed*, don't ask why - AB */
old = inw(SLDM_REG(chip, DMACOUNT));
while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
old = new;
ptr = chip->dma1_size - 1 - new;
#else
size_t count;
unsigned int diff;
ptr = inl(SLDM_REG(chip, DMAADDR));
count = inw(SLDM_REG(chip, DMACOUNT));
diff = chip->dma1_start + chip->dma1_size - ptr - count;
if (diff > 3 || ptr < chip->dma1_start
|| ptr >= chip->dma1_start+chip->dma1_size)
ptr = chip->last_capture_dmaaddr; /* bad, use last saved */
else
chip->last_capture_dmaaddr = ptr; /* good, remember it */
ptr -= chip->dma1_start;
#endif
return ptr >> chip->dma1_shift;
}
static snd_pcm_uframes_t snd_es1938_playback1_pointer(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
size_t ptr;
#if 1
ptr = chip->dma2_size - inw(SLIO_REG(chip, AUDIO2DMACOUNT));
#else
ptr = inl(SLIO_REG(chip, AUDIO2DMAADDR)) - chip->dma2_start;
#endif
return ptr >> chip->dma2_shift;
}
static snd_pcm_uframes_t snd_es1938_playback2_pointer(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
size_t ptr;
size_t old, new;
#if 1
/* This stuff is *needed*, don't ask why - AB */
old = inw(SLDM_REG(chip, DMACOUNT));
while ((new = inw(SLDM_REG(chip, DMACOUNT))) != old)
old = new;
ptr = chip->dma1_size - 1 - new;
#else
ptr = inl(SLDM_REG(chip, DMAADDR)) - chip->dma1_start;
#endif
return ptr >> chip->dma1_shift;
}
static snd_pcm_uframes_t snd_es1938_playback_pointer(struct snd_pcm_substream *substream)
{
switch (substream->number) {
case 0:
return snd_es1938_playback1_pointer(substream);
case 1:
return snd_es1938_playback2_pointer(substream);
}
snd_BUG();
return -EINVAL;
}
static int snd_es1938_capture_copy(struct snd_pcm_substream *substream,
int channel,
snd_pcm_uframes_t pos,
void __user *dst,
snd_pcm_uframes_t count)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct es1938 *chip = snd_pcm_substream_chip(substream);
pos <<= chip->dma1_shift;
count <<= chip->dma1_shift;
snd_assert(pos + count <= chip->dma1_size, return -EINVAL);
if (pos + count < chip->dma1_size) {
if (copy_to_user(dst, runtime->dma_area + pos + 1, count))
return -EFAULT;
} else {
if (copy_to_user(dst, runtime->dma_area + pos + 1, count - 1))
return -EFAULT;
if (put_user(runtime->dma_area[0], ((unsigned char __user *)dst) + count - 1))
return -EFAULT;
}
return 0;
}
/*
* buffer management
*/
static int snd_es1938_pcm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *hw_params)
{
int err;
if ((err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params))) < 0)
return err;
return 0;
}
static int snd_es1938_pcm_hw_free(struct snd_pcm_substream *substream)
{
return snd_pcm_lib_free_pages(substream);
}
/* ----------------------------------------------------------------------
* Audio1 Capture (ADC)
* ----------------------------------------------------------------------*/
static struct snd_pcm_hardware snd_es1938_capture =
{
.info = (SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER),
.formats = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
.rate_min = 6000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 0x8000, /* DMA controller screws on higher values */
.period_bytes_min = 64,
.period_bytes_max = 0x8000,
.periods_min = 1,
.periods_max = 1024,
.fifo_size = 256,
};
/* -----------------------------------------------------------------------
* Audio2 Playback (DAC)
* -----------------------------------------------------------------------*/
static struct snd_pcm_hardware snd_es1938_playback =
{
.info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP_VALID),
.formats = (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_U16_LE),
.rates = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
.rate_min = 6000,
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
.buffer_bytes_max = 0x8000, /* DMA controller screws on higher values */
.period_bytes_min = 64,
.period_bytes_max = 0x8000,
.periods_min = 1,
.periods_max = 1024,
.fifo_size = 256,
};
static int snd_es1938_capture_open(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
if (chip->playback2_substream)
return -EAGAIN;
chip->capture_substream = substream;
runtime->hw = snd_es1938_capture;
snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
&hw_constraints_clocks);
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
return 0;
}
static int snd_es1938_playback_open(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
switch (substream->number) {
case 0:
chip->playback1_substream = substream;
break;
case 1:
if (chip->capture_substream)
return -EAGAIN;
chip->playback2_substream = substream;
break;
default:
snd_BUG();
return -EINVAL;
}
runtime->hw = snd_es1938_playback;
snd_pcm_hw_constraint_ratnums(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
&hw_constraints_clocks);
snd_pcm_hw_constraint_minmax(runtime, SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 0, 0xff00);
return 0;
}
static int snd_es1938_capture_close(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
chip->capture_substream = NULL;
return 0;
}
static int snd_es1938_playback_close(struct snd_pcm_substream *substream)
{
struct es1938 *chip = snd_pcm_substream_chip(substream);
switch (substream->number) {
case 0:
chip->playback1_substream = NULL;
break;
case 1:
chip->playback2_substream = NULL;
break;
default:
snd_BUG();