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[/] [test_project/] [trunk/] [linux_sd_driver/] [sound/] [pci/] [es1938.c] - Blame information for rev 62

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/*
 *  Driver for ESS Solo-1 (ES1938, ES1946, ES1969) soundcard
 *  Copyright (c) by Jaromir Koutek <miri@punknet.cz>,
 *                   Jaroslav Kysela <perex@perex.cz>,
 *                   Thomas Sailer <sailer@ife.ee.ethz.ch>,
 *                   Abramo Bagnara <abramo@alsa-project.org>,
 *                   Markus Gruber <gruber@eikon.tum.de>
 *
 * 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 <sound/driver.h>
#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 <miri@punknet.cz>");
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 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));
        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;
}
 
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;
        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_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();
                return -EINVAL;
        }
        return 0;
}
 
static struct snd_pcm_ops snd_es1938_playback_ops = {
        .open =         snd_es1938_playback_open,
        .close =        snd_es1938_playback_close,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_es1938_pcm_hw_params,
        .hw_free =      snd_es1938_pcm_hw_free,
        .prepare =      snd_es1938_playback_prepare,
        .trigger =      snd_es1938_playback_trigger,
        .pointer =      snd_es1938_playback_pointer,
};
 
static struct snd_pcm_ops snd_es1938_capture_ops = {
        .open =         snd_es1938_capture_open,
        .close =        snd_es1938_capture_close,
        .ioctl =        snd_pcm_lib_ioctl,
        .hw_params =    snd_es1938_pcm_hw_params,
        .hw_free =      snd_es1938_pcm_hw_free,
        .prepare =      snd_es1938_capture_prepare,
        .trigger =      snd_es1938_capture_trigger,
        .pointer =      snd_es1938_capture_pointer,
        .copy =         snd_es1938_capture_copy,
};
 
static int __devinit snd_es1938_new_pcm(struct es1938 *chip, int device)
{
        struct snd_pcm *pcm;
        int err;
 
        if ((err = snd_pcm_new(chip->card, "es-1938-1946", device, 2, 1, &pcm)) < 0)
                return err;
        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_es1938_playback_ops);
        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_es1938_capture_ops);
 
        pcm->private_data = chip;
        pcm->info_flags = 0;
        strcpy(pcm->name, "ESS Solo-1");
 
        snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                                              snd_dma_pci_data(chip->pci), 64*1024, 64*1024);
 
        chip->pcm = pcm;
        return 0;
}
 
/* -------------------------------------------------------------------
 *
 *                       *** Mixer part ***
 */
 
static int snd_es1938_info_mux(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_info *uinfo)
{
        static char *texts[8] = {
                "Mic", "Mic Master", "CD", "AOUT",
                "Mic1", "Mix", "Line", "Master"
        };
 
        uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
        uinfo->count = 1;
        uinfo->value.enumerated.items = 8;
        if (uinfo->value.enumerated.item > 7)
                uinfo->value.enumerated.item = 7;
        strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
        return 0;
}
 
static int snd_es1938_get_mux(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        ucontrol->value.enumerated.item[0] = snd_es1938_mixer_read(chip, 0x1c) & 0x07;
        return 0;
}
 
static int snd_es1938_put_mux(struct snd_kcontrol *kcontrol,
                              struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        unsigned char val = ucontrol->value.enumerated.item[0];
 
        if (val > 7)
                return -EINVAL;
        return snd_es1938_mixer_bits(chip, 0x1c, 0x07, val) != val;
}
 
#define snd_es1938_info_spatializer_enable      snd_ctl_boolean_mono_info
 
static int snd_es1938_get_spatializer_enable(struct snd_kcontrol *kcontrol,
                                             struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        unsigned char val = snd_es1938_mixer_read(chip, 0x50);
        ucontrol->value.integer.value[0] = !!(val & 8);
        return 0;
}
 
static int snd_es1938_put_spatializer_enable(struct snd_kcontrol *kcontrol,
                                             struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        unsigned char oval, nval;
        int change;
        nval = ucontrol->value.integer.value[0] ? 0x0c : 0x04;
        oval = snd_es1938_mixer_read(chip, 0x50) & 0x0c;
        change = nval != oval;
        if (change) {
                snd_es1938_mixer_write(chip, 0x50, nval & ~0x04);
                snd_es1938_mixer_write(chip, 0x50, nval);
        }
        return change;
}
 
static int snd_es1938_info_hw_volume(struct snd_kcontrol *kcontrol,
                                     struct snd_ctl_elem_info *uinfo)
{
        uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 2;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = 63;
        return 0;
}
 
static int snd_es1938_get_hw_volume(struct snd_kcontrol *kcontrol,
                                    struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        ucontrol->value.integer.value[0] = snd_es1938_mixer_read(chip, 0x61) & 0x3f;
        ucontrol->value.integer.value[1] = snd_es1938_mixer_read(chip, 0x63) & 0x3f;
        return 0;
}
 
#define snd_es1938_info_hw_switch               snd_ctl_boolean_stereo_info
 
static int snd_es1938_get_hw_switch(struct snd_kcontrol *kcontrol,
                                    struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        ucontrol->value.integer.value[0] = !(snd_es1938_mixer_read(chip, 0x61) & 0x40);
        ucontrol->value.integer.value[1] = !(snd_es1938_mixer_read(chip, 0x63) & 0x40);
        return 0;
}
 
static void snd_es1938_hwv_free(struct snd_kcontrol *kcontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        chip->master_volume = NULL;
        chip->master_switch = NULL;
        chip->hw_volume = NULL;
        chip->hw_switch = NULL;
}
 
static int snd_es1938_reg_bits(struct es1938 *chip, unsigned char reg,
                               unsigned char mask, unsigned char val)
{
        if (reg < 0xa0)
                return snd_es1938_mixer_bits(chip, reg, mask, val);
        else
                return snd_es1938_bits(chip, reg, mask, val);
}
 
static int snd_es1938_reg_read(struct es1938 *chip, unsigned char reg)
{
        if (reg < 0xa0)
                return snd_es1938_mixer_read(chip, reg);
        else
                return snd_es1938_read(chip, reg);
}
 
#define ES1938_SINGLE_TLV(xname, xindex, reg, shift, mask, invert, xtlv)    \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,\
  .name = xname, .index = xindex, \
  .info = snd_es1938_info_single, \
  .get = snd_es1938_get_single, .put = snd_es1938_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24), \
  .tlv = { .p = xtlv } }
#define ES1938_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es1938_info_single, \
  .get = snd_es1938_get_single, .put = snd_es1938_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }
 
static int snd_es1938_info_single(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        int mask = (kcontrol->private_value >> 16) & 0xff;
 
        uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 1;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = mask;
        return 0;
}
 
static int snd_es1938_get_single(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        int reg = kcontrol->private_value & 0xff;
        int shift = (kcontrol->private_value >> 8) & 0xff;
        int mask = (kcontrol->private_value >> 16) & 0xff;
        int invert = (kcontrol->private_value >> 24) & 0xff;
        int val;
 
        val = snd_es1938_reg_read(chip, reg);
        ucontrol->value.integer.value[0] = (val >> shift) & mask;
        if (invert)
                ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
        return 0;
}
 
static int snd_es1938_put_single(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        int reg = kcontrol->private_value & 0xff;
        int shift = (kcontrol->private_value >> 8) & 0xff;
        int mask = (kcontrol->private_value >> 16) & 0xff;
        int invert = (kcontrol->private_value >> 24) & 0xff;
        unsigned char val;
 
        val = (ucontrol->value.integer.value[0] & mask);
        if (invert)
                val = mask - val;
        mask <<= shift;
        val <<= shift;
        return snd_es1938_reg_bits(chip, reg, mask, val) != val;
}
 
#define ES1938_DOUBLE_TLV(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert, xtlv) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ,\
  .name = xname, .index = xindex, \
  .info = snd_es1938_info_double, \
  .get = snd_es1938_get_double, .put = snd_es1938_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22), \
  .tlv = { .p = xtlv } }
#define ES1938_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
  .info = snd_es1938_info_double, \
  .get = snd_es1938_get_double, .put = snd_es1938_put_double, \
  .private_value = left_reg | (right_reg << 8) | (shift_left << 16) | (shift_right << 19) | (mask << 24) | (invert << 22) }
 
static int snd_es1938_info_double(struct snd_kcontrol *kcontrol,
                                  struct snd_ctl_elem_info *uinfo)
{
        int mask = (kcontrol->private_value >> 24) & 0xff;
 
        uinfo->type = mask == 1 ? SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
        uinfo->count = 2;
        uinfo->value.integer.min = 0;
        uinfo->value.integer.max = mask;
        return 0;
}
 
static int snd_es1938_get_double(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        int left_reg = kcontrol->private_value & 0xff;
        int right_reg = (kcontrol->private_value >> 8) & 0xff;
        int shift_left = (kcontrol->private_value >> 16) & 0x07;
        int shift_right = (kcontrol->private_value >> 19) & 0x07;
        int mask = (kcontrol->private_value >> 24) & 0xff;
        int invert = (kcontrol->private_value >> 22) & 1;
        unsigned char left, right;
 
        left = snd_es1938_reg_read(chip, left_reg);
        if (left_reg != right_reg)
                right = snd_es1938_reg_read(chip, right_reg);
        else
                right = left;
        ucontrol->value.integer.value[0] = (left >> shift_left) & mask;
        ucontrol->value.integer.value[1] = (right >> shift_right) & mask;
        if (invert) {
                ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
                ucontrol->value.integer.value[1] = mask - ucontrol->value.integer.value[1];
        }
        return 0;
}
 
static int snd_es1938_put_double(struct snd_kcontrol *kcontrol,
                                 struct snd_ctl_elem_value *ucontrol)
{
        struct es1938 *chip = snd_kcontrol_chip(kcontrol);
        int left_reg = kcontrol->private_value & 0xff;
        int right_reg = (kcontrol->private_value >> 8) & 0xff;
        int shift_left = (kcontrol->private_value >> 16) & 0x07;
        int shift_right = (kcontrol->private_value >> 19) & 0x07;
        int mask = (kcontrol->private_value >> 24) & 0xff;
        int invert = (kcontrol->private_value >> 22) & 1;
        int change;
        unsigned char val1, val2, mask1, mask2;
 
        val1 = ucontrol->value.integer.value[0] & mask;
        val2 = ucontrol->value.integer.value[1] & mask;
        if (invert) {
                val1 = mask - val1;
                val2 = mask - val2;
        }
        val1 <<= shift_left;
        val2 <<= shift_right;
        mask1 = mask << shift_left;
        mask2 = mask << shift_right;
        if (left_reg != right_reg) {
                change = 0;
                if (snd_es1938_reg_bits(chip, left_reg, mask1, val1) != val1)
                        change = 1;
                if (snd_es1938_reg_bits(chip, right_reg, mask2, val2) != val2)
                        change = 1;
        } else {
                change = (snd_es1938_reg_bits(chip, left_reg, mask1 | mask2,
                                              val1 | val2) != (val1 | val2));
        }
        return change;
}
 
static unsigned int db_scale_master[] = {
        TLV_DB_RANGE_HEAD(2),
        0, 54, TLV_DB_SCALE_ITEM(-3600, 50, 1),
        54, 63, TLV_DB_SCALE_ITEM(-900, 100, 0),
};
 
static unsigned int db_scale_audio1[] = {
        TLV_DB_RANGE_HEAD(2),
        0, 8, TLV_DB_SCALE_ITEM(-3300, 300, 1),
        8, 15, TLV_DB_SCALE_ITEM(-900, 150, 0),
};
 
static unsigned int db_scale_audio2[] = {
        TLV_DB_RANGE_HEAD(2),
        0, 8, TLV_DB_SCALE_ITEM(-3450, 300, 1),
        8, 15, TLV_DB_SCALE_ITEM(-1050, 150, 0),
};
 
static unsigned int db_scale_mic[] = {
        TLV_DB_RANGE_HEAD(2),
        0, 8, TLV_DB_SCALE_ITEM(-2400, 300, 1),
        8, 15, TLV_DB_SCALE_ITEM(0, 150, 0),
};
 
static unsigned int db_scale_line[] = {
        TLV_DB_RANGE_HEAD(2),
        0, 8, TLV_DB_SCALE_ITEM(-3150, 300, 1),
        8, 15, TLV_DB_SCALE_ITEM(-750, 150, 0),
};
 
static const DECLARE_TLV_DB_SCALE(db_scale_capture, 0, 150, 0);
 
static struct snd_kcontrol_new snd_es1938_controls[] = {
ES1938_DOUBLE_TLV("Master Playback Volume", 0, 0x60, 0x62, 0, 0, 63, 0,
                  db_scale_master),
ES1938_DOUBLE("Master Playback Switch", 0, 0x60, 0x62, 6, 6, 1, 1),
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Hardware Master Playback Volume",
        .access = SNDRV_CTL_ELEM_ACCESS_READ,
        .info = snd_es1938_info_hw_volume,
        .get = snd_es1938_get_hw_volume,
},
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .access = (SNDRV_CTL_ELEM_ACCESS_READ |
                   SNDRV_CTL_ELEM_ACCESS_TLV_READ),
        .name = "Hardware Master Playback Switch",
        .info = snd_es1938_info_hw_switch,
        .get = snd_es1938_get_hw_switch,
        .tlv = { .p = db_scale_master },
},
ES1938_SINGLE("Hardware Volume Split", 0, 0x64, 7, 1, 0),
ES1938_DOUBLE_TLV("Line Playback Volume", 0, 0x3e, 0x3e, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE("CD Playback Volume", 0, 0x38, 0x38, 4, 0, 15, 0),
ES1938_DOUBLE_TLV("FM Playback Volume", 0, 0x36, 0x36, 4, 0, 15, 0,
                  db_scale_mic),
ES1938_DOUBLE_TLV("Mono Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE_TLV("Mic Playback Volume", 0, 0x1a, 0x1a, 4, 0, 15, 0,
                  db_scale_mic),
ES1938_DOUBLE_TLV("Aux Playback Volume", 0, 0x3a, 0x3a, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE_TLV("Capture Volume", 0, 0xb4, 0xb4, 4, 0, 15, 0,
                  db_scale_capture),
ES1938_SINGLE("PC Speaker Volume", 0, 0x3c, 0, 7, 0),
ES1938_SINGLE("Record Monitor", 0, 0xa8, 3, 1, 0),
ES1938_SINGLE("Capture Switch", 0, 0x1c, 4, 1, 1),
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Capture Source",
        .info = snd_es1938_info_mux,
        .get = snd_es1938_get_mux,
        .put = snd_es1938_put_mux,
},
ES1938_DOUBLE_TLV("Mono Input Playback Volume", 0, 0x6d, 0x6d, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE_TLV("PCM Capture Volume", 0, 0x69, 0x69, 4, 0, 15, 0,
                  db_scale_audio2),
ES1938_DOUBLE_TLV("Mic Capture Volume", 0, 0x68, 0x68, 4, 0, 15, 0,
                  db_scale_mic),
ES1938_DOUBLE_TLV("Line Capture Volume", 0, 0x6e, 0x6e, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE_TLV("FM Capture Volume", 0, 0x6b, 0x6b, 4, 0, 15, 0,
                  db_scale_mic),
ES1938_DOUBLE_TLV("Mono Capture Volume", 0, 0x6f, 0x6f, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE_TLV("CD Capture Volume", 0, 0x6a, 0x6a, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE_TLV("Aux Capture Volume", 0, 0x6c, 0x6c, 4, 0, 15, 0,
                  db_scale_line),
ES1938_DOUBLE_TLV("PCM Playback Volume", 0, 0x7c, 0x7c, 4, 0, 15, 0,
                  db_scale_audio2),
ES1938_DOUBLE_TLV("PCM Playback Volume", 1, 0x14, 0x14, 4, 0, 15, 0,
                  db_scale_audio1),
ES1938_SINGLE("3D Control - Level", 0, 0x52, 0, 63, 0),
{
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "3D Control - Switch",
        .info = snd_es1938_info_spatializer_enable,
        .get = snd_es1938_get_spatializer_enable,
        .put = snd_es1938_put_spatializer_enable,
},
ES1938_SINGLE("Mic Boost (+26dB)", 0, 0x7d, 3, 1, 0)
};
 
 
/* ---------------------------------------------------------------------------- */
/* ---------------------------------------------------------------------------- */
 
/*
 * initialize the chip - used by resume callback, too
 */
static void snd_es1938_chip_init(struct es1938 *chip)
{
        /* reset chip */
        snd_es1938_reset(chip);
 
        /* configure native mode */
 
        /* enable bus master */
        pci_set_master(chip->pci);
 
        /* disable legacy audio */
        pci_write_config_word(chip->pci, SL_PCI_LEGACYCONTROL, 0x805f);
 
        /* set DDMA base */
        pci_write_config_word(chip->pci, SL_PCI_DDMACONTROL, chip->ddma_port | 1);
 
        /* set DMA/IRQ policy */
        pci_write_config_dword(chip->pci, SL_PCI_CONFIG, 0);
 
        /* enable Audio 1, Audio 2, MPU401 IRQ and HW volume IRQ*/
        outb(0xf0, SLIO_REG(chip, IRQCONTROL));
 
        /* reset DMA */
        outb(0, SLDM_REG(chip, DMACLEAR));
}
 
#ifdef CONFIG_PM
/*
 * PM support
 */
 
static unsigned char saved_regs[SAVED_REG_SIZE+1] = {
        0x14, 0x1a, 0x1c, 0x3a, 0x3c, 0x3e, 0x36, 0x38,
        0x50, 0x52, 0x60, 0x61, 0x62, 0x63, 0x64, 0x68,
        0x69, 0x6a, 0x6b, 0x6d, 0x6e, 0x6f, 0x7c, 0x7d,
        0xa8, 0xb4,
};
 
 
static int es1938_suspend(struct pci_dev *pci, pm_message_t state)
{
        struct snd_card *card = pci_get_drvdata(pci);
        struct es1938 *chip = card->private_data;
        unsigned char *s, *d;
 
        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
        snd_pcm_suspend_all(chip->pcm);
 
        /* save mixer-related registers */
        for (s = saved_regs, d = chip->saved_regs; *s; s++, d++)
                *d = snd_es1938_reg_read(chip, *s);
 
        outb(0x00, SLIO_REG(chip, IRQCONTROL)); /* disable irqs */
        if (chip->irq >= 0) {
                synchronize_irq(chip->irq);
                free_irq(chip->irq, chip);
                chip->irq = -1;
        }
        pci_disable_device(pci);
        pci_save_state(pci);
        pci_set_power_state(pci, pci_choose_state(pci, state));
        return 0;
}
 
static int es1938_resume(struct pci_dev *pci)
{
        struct snd_card *card = pci_get_drvdata(pci);
        struct es1938 *chip = card->private_data;
        unsigned char *s, *d;
 
        pci_set_power_state(pci, PCI_D0);
        pci_restore_state(pci);
        if (pci_enable_device(pci) < 0) {
                printk(KERN_ERR "es1938: pci_enable_device failed, "
                       "disabling device\n");
                snd_card_disconnect(card);
                return -EIO;
        }
 
        if (request_irq(pci->irq, snd_es1938_interrupt,
                        IRQF_SHARED, "ES1938", chip)) {
                printk(KERN_ERR "es1938: unable to grab IRQ %d, "
                       "disabling device\n", pci->irq);
                snd_card_disconnect(card);
                return -EIO;
        }
        chip->irq = pci->irq;
        snd_es1938_chip_init(chip);
 
        /* restore mixer-related registers */
        for (s = saved_regs, d = chip->saved_regs; *s; s++, d++) {
                if (*s < 0xa0)
                        snd_es1938_mixer_write(chip, *s, *d);
                else
                        snd_es1938_write(chip, *s, *d);
        }
 
        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
        return 0;
}
#endif /* CONFIG_PM */
 
#ifdef SUPPORT_JOYSTICK
static int __devinit snd_es1938_create_gameport(struct es1938 *chip)
{
        struct gameport *gp;
 
        chip->gameport = gp = gameport_allocate_port();
        if (!gp) {
                printk(KERN_ERR "es1938: cannot allocate memory for gameport\n");
                return -ENOMEM;
        }
 
        gameport_set_name(gp, "ES1938");
        gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
        gameport_set_dev_parent(gp, &chip->pci->dev);
        gp->io = chip->game_port;
 
        gameport_register_port(gp);
 
        return 0;
}
 
static void snd_es1938_free_gameport(struct es1938 *chip)
{
        if (chip->gameport) {
                gameport_unregister_port(chip->gameport);
                chip->gameport = NULL;
        }
}
#else
static inline int snd_es1938_create_gameport(struct es1938 *chip) { return -ENOSYS; }
static inline void snd_es1938_free_gameport(struct es1938 *chip) { }
#endif /* SUPPORT_JOYSTICK */
 
static int snd_es1938_free(struct es1938 *chip)
{
        /* disable irqs */
        outb(0x00, SLIO_REG(chip, IRQCONTROL));
        if (chip->rmidi)
                snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0);
 
        snd_es1938_free_gameport(chip);
 
        if (chip->irq >= 0) {
                synchronize_irq(chip->irq);
                free_irq(chip->irq, chip);
        }
        pci_release_regions(chip->pci);
        pci_disable_device(chip->pci);
        kfree(chip);
        return 0;
}
 
static int snd_es1938_dev_free(struct snd_device *device)
{
        struct es1938 *chip = device->device_data;
        return snd_es1938_free(chip);
}
 
static int __devinit snd_es1938_create(struct snd_card *card,
                                    struct pci_dev * pci,
                                    struct es1938 ** rchip)
{
        struct es1938 *chip;
        int err;
        static struct snd_device_ops ops = {
                .dev_free =     snd_es1938_dev_free,
        };
 
        *rchip = NULL;
 
        /* enable PCI device */
        if ((err = pci_enable_device(pci)) < 0)
                return err;
        /* check, if we can restrict PCI DMA transfers to 24 bits */
        if (pci_set_dma_mask(pci, DMA_24BIT_MASK) < 0 ||
            pci_set_consistent_dma_mask(pci, DMA_24BIT_MASK) < 0) {
                snd_printk(KERN_ERR "architecture does not support 24bit PCI busmaster DMA\n");
                pci_disable_device(pci);
                return -ENXIO;
        }
 
        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
        if (chip == NULL) {
                pci_disable_device(pci);
                return -ENOMEM;
        }
        spin_lock_init(&chip->reg_lock);
        spin_lock_init(&chip->mixer_lock);
        chip->card = card;
        chip->pci = pci;
        chip->irq = -1;
        if ((err = pci_request_regions(pci, "ESS Solo-1")) < 0) {
                kfree(chip);
                pci_disable_device(pci);
                return err;
        }
        chip->io_port = pci_resource_start(pci, 0);
        chip->sb_port = pci_resource_start(pci, 1);
        chip->vc_port = pci_resource_start(pci, 2);
        chip->mpu_port = pci_resource_start(pci, 3);
        chip->game_port = pci_resource_start(pci, 4);
        if (request_irq(pci->irq, snd_es1938_interrupt, IRQF_SHARED,
                        "ES1938", chip)) {
                snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
                snd_es1938_free(chip);
                return -EBUSY;
        }
        chip->irq = pci->irq;
#ifdef ES1938_DDEBUG
        snd_printk(KERN_DEBUG "create: io: 0x%lx, sb: 0x%lx, vc: 0x%lx, mpu: 0x%lx, game: 0x%lx\n",
                   chip->io_port, chip->sb_port, chip->vc_port, chip->mpu_port, chip->game_port);
#endif
 
        chip->ddma_port = chip->vc_port + 0x00;         /* fix from Thomas Sailer */
 
        snd_es1938_chip_init(chip);
 
        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
                snd_es1938_free(chip);
                return err;
        }
 
        snd_card_set_dev(card, &pci->dev);
 
        *rchip = chip;
        return 0;
}
 
/* --------------------------------------------------------------------
 * Interrupt handler
 * -------------------------------------------------------------------- */
static irqreturn_t snd_es1938_interrupt(int irq, void *dev_id)
{
        struct es1938 *chip = dev_id;
        unsigned char status, audiostatus;
        int handled = 0;
 
        status = inb(SLIO_REG(chip, IRQCONTROL));
#if 0
        printk("Es1938debug - interrupt status: =0x%x\n", status);
#endif
 
        /* AUDIO 1 */
        if (status & 0x10) {
#if 0
                printk("Es1938debug - AUDIO channel 1 interrupt\n");
                printk("Es1938debug - AUDIO channel 1 DMAC DMA count: %u\n",
                       inw(SLDM_REG(chip, DMACOUNT)));
                printk("Es1938debug - AUDIO channel 1 DMAC DMA base: %u\n",
                       inl(SLDM_REG(chip, DMAADDR)));
                printk("Es1938debug - AUDIO channel 1 DMAC DMA status: 0x%x\n",
                       inl(SLDM_REG(chip, DMASTATUS)));
#endif
                /* clear irq */
                handled = 1;
                audiostatus = inb(SLSB_REG(chip, STATUS));
                if (chip->active & ADC1)
                        snd_pcm_period_elapsed(chip->capture_substream);
                else if (chip->active & DAC1)
                        snd_pcm_period_elapsed(chip->playback2_substream);
        }
 
        /* AUDIO 2 */
        if (status & 0x20) {
#if 0
                printk("Es1938debug - AUDIO channel 2 interrupt\n");
                printk("Es1938debug - AUDIO channel 2 DMAC DMA count: %u\n",
                       inw(SLIO_REG(chip, AUDIO2DMACOUNT)));
                printk("Es1938debug - AUDIO channel 2 DMAC DMA base: %u\n",
                       inl(SLIO_REG(chip, AUDIO2DMAADDR)));
 
#endif
                /* clear irq */
                handled = 1;
                snd_es1938_mixer_bits(chip, ESSSB_IREG_AUDIO2CONTROL2, 0x80, 0);
                if (chip->active & DAC2)
                        snd_pcm_period_elapsed(chip->playback1_substream);
        }
 
        /* Hardware volume */
        if (status & 0x40) {
                int split = snd_es1938_mixer_read(chip, 0x64) & 0x80;
                handled = 1;
                snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_switch->id);
                snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE, &chip->hw_volume->id);
                if (!split) {
                        snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
                                       &chip->master_switch->id);
                        snd_ctl_notify(chip->card, SNDRV_CTL_EVENT_MASK_VALUE,
                                       &chip->master_volume->id);
                }
                /* ack interrupt */
                snd_es1938_mixer_write(chip, 0x66, 0x00);
        }
 
        /* MPU401 */
        if (status & 0x80) {
                // the following line is evil! It switches off MIDI interrupt handling after the first interrupt received.
                // replacing the last 0 by 0x40 works for ESS-Solo1, but just doing nothing works as well!
                // andreas@flying-snail.de
                // snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0); /* ack? */
                if (chip->rmidi) {
                        handled = 1;
                        snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data);
                }
        }
        return IRQ_RETVAL(handled);
}
 
#define ES1938_DMA_SIZE 64
 
static int __devinit snd_es1938_mixer(struct es1938 *chip)
{
        struct snd_card *card;
        unsigned int idx;
        int err;
 
        card = chip->card;
 
        strcpy(card->mixername, "ESS Solo-1");
 
        for (idx = 0; idx < ARRAY_SIZE(snd_es1938_controls); idx++) {
                struct snd_kcontrol *kctl;
                kctl = snd_ctl_new1(&snd_es1938_controls[idx], chip);
                switch (idx) {
                        case 0:
                                chip->master_volume = kctl;
                                kctl->private_free = snd_es1938_hwv_free;
                                break;
                        case 1:
                                chip->master_switch = kctl;
                                kctl->private_free = snd_es1938_hwv_free;
                                break;
                        case 2:
                                chip->hw_volume = kctl;
                                kctl->private_free = snd_es1938_hwv_free;
                                break;
                        case 3:
                                chip->hw_switch = kctl;
                                kctl->private_free = snd_es1938_hwv_free;
                                break;
                        }
                if ((err = snd_ctl_add(card, kctl)) < 0)
                        return err;
        }
        return 0;
}
 
 
static int __devinit snd_es1938_probe(struct pci_dev *pci,
                                      const struct pci_device_id *pci_id)
{
        static int dev;
        struct snd_card *card;
        struct es1938 *chip;
        struct snd_opl3 *opl3;
        int idx, err;
 
        if (dev >= SNDRV_CARDS)
                return -ENODEV;
        if (!enable[dev]) {
                dev++;
                return -ENOENT;
        }
 
        card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
        if (card == NULL)
                return -ENOMEM;
        for (idx = 0; idx < 5; idx++) {
                if (pci_resource_start(pci, idx) == 0 ||
                    !(pci_resource_flags(pci, idx) & IORESOURCE_IO)) {
                        snd_card_free(card);
                        return -ENODEV;
                }
        }
        if ((err = snd_es1938_create(card, pci, &chip)) < 0) {
                snd_card_free(card);
                return err;
        }
        card->private_data = chip;
 
        strcpy(card->driver, "ES1938");
        strcpy(card->shortname, "ESS ES1938 (Solo-1)");
        sprintf(card->longname, "%s rev %i, irq %i",
                card->shortname,
                chip->revision,
                chip->irq);
 
        if ((err = snd_es1938_new_pcm(chip, 0)) < 0) {
                snd_card_free(card);
                return err;
        }
        if ((err = snd_es1938_mixer(chip)) < 0) {
                snd_card_free(card);
                return err;
        }
        if (snd_opl3_create(card,
                            SLSB_REG(chip, FMLOWADDR),
                            SLSB_REG(chip, FMHIGHADDR),
                            OPL3_HW_OPL3, 1, &opl3) < 0) {
                printk(KERN_ERR "es1938: OPL3 not detected at 0x%lx\n",
                           SLSB_REG(chip, FMLOWADDR));
        } else {
                if ((err = snd_opl3_timer_new(opl3, 0, 1)) < 0) {
                        snd_card_free(card);
                        return err;
                }
                if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
                        snd_card_free(card);
                        return err;
                }
        }
        if (snd_mpu401_uart_new(card, 0, MPU401_HW_MPU401,
                                chip->mpu_port, MPU401_INFO_INTEGRATED,
                                chip->irq, 0, &chip->rmidi) < 0) {
                printk(KERN_ERR "es1938: unable to initialize MPU-401\n");
        } else {
                // this line is vital for MIDI interrupt handling on ess-solo1
                // andreas@flying-snail.de
                snd_es1938_mixer_bits(chip, ESSSB_IREG_MPU401CONTROL, 0x40, 0x40);
        }
 
        snd_es1938_create_gameport(chip);
 
        if ((err = snd_card_register(card)) < 0) {
                snd_card_free(card);
                return err;
        }
 
        pci_set_drvdata(pci, card);
        dev++;
        return 0;
}
 
static void __devexit snd_es1938_remove(struct pci_dev *pci)
{
        snd_card_free(pci_get_drvdata(pci));
        pci_set_drvdata(pci, NULL);
}
 
static struct pci_driver driver = {
        .name = "ESS ES1938 (Solo-1)",
        .id_table = snd_es1938_ids,
        .probe = snd_es1938_probe,
        .remove = __devexit_p(snd_es1938_remove),
#ifdef CONFIG_PM
        .suspend = es1938_suspend,
        .resume = es1938_resume,
#endif
};
 
static int __init alsa_card_es1938_init(void)
{
        return pci_register_driver(&driver);
}
 
static void __exit alsa_card_es1938_exit(void)
{
        pci_unregister_driver(&driver);
}
 
module_init(alsa_card_es1938_init)
module_exit(alsa_card_es1938_exit)
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[/] [test_project/] [trunk/] [linux_sd_driver/] [sound/] [pci/] [es1938.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* Driver for ESS Solo-1 (ES1938, ES1946, ES1969) soundcard`
3			`* Copyright (c) by Jaromir Koutek <miri@punknet.cz>,`
4			`* Jaroslav Kysela <perex@perex.cz>,`
5			`* Thomas Sailer <sailer@ife.ee.ethz.ch>,`
6			`* Abramo Bagnara <abramo@alsa-project.org>,`
7			`* Markus Gruber <gruber@eikon.tum.de>`
8			`*`
9			`* Rewritten from sonicvibes.c source.`
10			`*`
11			`* TODO:`
12			`* Rewrite better spinlocks`
13			`*`
14			`*`
15			`* This program is free software; you can redistribute it and/or modify`
16			`* it under the terms of the GNU General Public License as published by`
17			`* the Free Software Foundation; either version 2 of the License, or`
18			`* (at your option) any later version.`
19			`*`
20			`* This program is distributed in the hope that it will be useful,`
21			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
22			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
23			`* GNU General Public License for more details.`
24			`*`
25			`* You should have received a copy of the GNU General Public License`
26			`* along with this program; if not, write to the Free Software`
27			`* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA`
28			`*`
29			`*/`
30
31			`/*`
32			`NOTES:`
33			`- Capture data is written unaligned starting from dma_base + 1 so I need to`
34			`disable mmap and to add a copy callback.`
35			`- After several cycle of the following:`
36			`while : ; do arecord -d1 -f cd -t raw \| aplay -f cd ; done`
37			`a "playback write error (DMA or IRQ trouble?)" may happen.`
38			`This is due to playback interrupts not generated.`
39			`I suspect a timing issue.`
40			`- Sometimes the interrupt handler is invoked wrongly during playback.`