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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [sound/] [cmpci.c] - Blame information for rev 1765

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/*****************************************************************************/
/*
 *      cmpci.c  --  C-Media PCI audio driver.
 *
 *      Copyright (C) 1999  ChenLi Tien (cltien@cmedia.com.tw)
 *                          C-media support (support@cmedia.com.tw)
 *
 *      Based on the PCI drivers by Thomas Sailer (sailer@ife.ee.ethz.ch)
 *
 *      For update, visit:
 *              http://members.home.net/puresoft/cmedia.html
 *              http://www.cmedia.com.tw
 *
 *      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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 * Special thanks to David C. Niemi, Jan Pfeifer
 *
 *
 * Module command line parameters:
 *   none so far
 *
 *
 *  Supported devices:
 *  /dev/dsp    standard /dev/dsp device, (mostly) OSS compatible
 *  /dev/mixer  standard /dev/mixer device, (mostly) OSS compatible
 *  /dev/midi   simple MIDI UART interface, no ioctl
 *
 *  The card has both an FM and a Wavetable synth, but I have to figure
 *  out first how to drive them...
 *
 *  Revision history
 *    06.05.98   0.1   Initial release
 *    10.05.98   0.2   Fixed many bugs, esp. ADC rate calculation
 *                     First stab at a simple midi interface (no bells&whistles)
 *    13.05.98   0.3   Fix stupid cut&paste error: set_adc_rate was called instead of
 *                     set_dac_rate in the FMODE_WRITE case in cm_open
 *                     Fix hwptr out of bounds (now mpg123 works)
 *    14.05.98   0.4   Don't allow excessive interrupt rates
 *    08.06.98   0.5   First release using Alan Cox' soundcore instead of miscdevice
 *    03.08.98   0.6   Do not include modversions.h
 *                     Now mixer behaviour can basically be selected between
 *                     "OSS documented" and "OSS actual" behaviour
 *    31.08.98   0.7   Fix realplayer problems - dac.count issues
 *    10.12.98   0.8   Fix drain_dac trying to wait on not yet initialized DMA
 *    16.12.98   0.9   Fix a few f_file & FMODE_ bugs
 *    06.01.99   0.10  remove the silly SA_INTERRUPT flag.
 *                     hopefully killed the egcs section type conflict
 *    12.03.99   0.11  cinfo.blocks should be reset after GETxPTR ioctl.
 *                     reported by Johan Maes <joma@telindus.be>
 *    22.03.99   0.12  return EAGAIN instead of EBUSY when O_NONBLOCK
 *                     read/write cannot be executed
 *    18.08.99   1.5   Only deallocate DMA buffer when unloading.
 *    02.09.99   1.6   Enable SPDIF LOOP
 *                     Change the mixer read back
 *    21.09.99   2.33  Use RCS version as driver version.
 *                     Add support for modem, S/PDIF loop and 4 channels.
 *                     (8738 only)
 *                     Fix bug cause x11amp cannot play.
 *
 *    Fixes:
 *    Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 *    18/05/2001 - .bss nitpicks, fix a bug in set_dac_channels where it
 *                 was calling prog_dmabuf with s->lock held, call missing
 *                 unlock_kernel in cm_midi_release
 *    08/10/2001 - use set_current_state in some more places
 *
 *      Carlos Eduardo Gorges <carlos@techlinux.com.br>
 *      Fri May 25 2001
 *      - SMP support ( spin[un]lock* revision )
 *      - speaker mixer support
 *      Mon Aug 13 2001
 *      - optimizations and cleanups
 *    03/01/2003 - open_mode fixes from Georg Acher <acher@in.tum.de>
 *
 */
/*****************************************************************************/
 
#include <linux/version.h>
#include <linux/config.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/sound.h>
#include <linux/slab.h>
#include <linux/soundcard.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <asm/dma.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/wrapper.h>
#include <asm/uaccess.h>
#include <asm/hardirq.h>
#include <linux/gameport.h>
#include <linux/bitops.h>
 
#include "dm.h"
 
/* --------------------------------------------------------------------- */
#undef OSS_DOCUMENTED_MIXER_SEMANTICS
#undef DMABYTEIO
/* --------------------------------------------------------------------- */
 
#define CM_MAGIC  ((PCI_VENDOR_ID_CMEDIA<<16)|PCI_DEVICE_ID_CMEDIA_CM8338A)
 
/* CM8338 registers definition ****************/
 
#define CODEC_CMI_FUNCTRL0              (0x00)
#define CODEC_CMI_FUNCTRL1              (0x04)
#define CODEC_CMI_CHFORMAT              (0x08)
#define CODEC_CMI_INT_HLDCLR            (0x0C)
#define CODEC_CMI_INT_STATUS            (0x10)
#define CODEC_CMI_LEGACY_CTRL           (0x14)
#define CODEC_CMI_MISC_CTRL             (0x18)
#define CODEC_CMI_TDMA_POS              (0x1C)
#define CODEC_CMI_MIXER                 (0x20)
#define CODEC_SB16_DATA                 (0x22)
#define CODEC_SB16_ADDR                 (0x23)
#define CODEC_CMI_MIXER1                (0x24)
#define CODEC_CMI_MIXER2                (0x25)
#define CODEC_CMI_AUX_VOL               (0x26)
#define CODEC_CMI_MISC                  (0x27)
#define CODEC_CMI_AC97                  (0x28)
 
#define CODEC_CMI_CH0_FRAME1            (0x80)
#define CODEC_CMI_CH0_FRAME2            (0x84)
#define CODEC_CMI_CH1_FRAME1            (0x88)
#define CODEC_CMI_CH1_FRAME2            (0x8C)
 
#define CODEC_CMI_EXT_REG               (0xF0)
 
/*  Mixer registers for SB16 ******************/
 
#define DSP_MIX_DATARESETIDX            ((unsigned char)(0x00))
 
#define DSP_MIX_MASTERVOLIDX_L          ((unsigned char)(0x30))
#define DSP_MIX_MASTERVOLIDX_R          ((unsigned char)(0x31))
#define DSP_MIX_VOICEVOLIDX_L           ((unsigned char)(0x32))
#define DSP_MIX_VOICEVOLIDX_R           ((unsigned char)(0x33))
#define DSP_MIX_FMVOLIDX_L              ((unsigned char)(0x34))
#define DSP_MIX_FMVOLIDX_R              ((unsigned char)(0x35))
#define DSP_MIX_CDVOLIDX_L              ((unsigned char)(0x36))
#define DSP_MIX_CDVOLIDX_R              ((unsigned char)(0x37))
#define DSP_MIX_LINEVOLIDX_L            ((unsigned char)(0x38))
#define DSP_MIX_LINEVOLIDX_R            ((unsigned char)(0x39))
 
#define DSP_MIX_MICVOLIDX               ((unsigned char)(0x3A))
#define DSP_MIX_SPKRVOLIDX              ((unsigned char)(0x3B))
 
#define DSP_MIX_OUTMIXIDX               ((unsigned char)(0x3C))
 
#define DSP_MIX_ADCMIXIDX_L             ((unsigned char)(0x3D))
#define DSP_MIX_ADCMIXIDX_R             ((unsigned char)(0x3E))
 
#define DSP_MIX_INGAINIDX_L             ((unsigned char)(0x3F))
#define DSP_MIX_INGAINIDX_R             ((unsigned char)(0x40))
#define DSP_MIX_OUTGAINIDX_L            ((unsigned char)(0x41))
#define DSP_MIX_OUTGAINIDX_R            ((unsigned char)(0x42))
 
#define DSP_MIX_AGCIDX                  ((unsigned char)(0x43))
 
#define DSP_MIX_TREBLEIDX_L             ((unsigned char)(0x44))
#define DSP_MIX_TREBLEIDX_R             ((unsigned char)(0x45))
#define DSP_MIX_BASSIDX_L               ((unsigned char)(0x46))
#define DSP_MIX_BASSIDX_R               ((unsigned char)(0x47))
#define DSP_MIX_EXTENSION               ((unsigned char)(0xf0))
// pseudo register for AUX
#define DSP_MIX_AUXVOL_L                ((unsigned char)(0x50))
#define DSP_MIX_AUXVOL_R                ((unsigned char)(0x51))
 
// I/O length
#define CM_EXTENT_CODEC   0x100
#define CM_EXTENT_MIDI    0x2
#define CM_EXTENT_SYNTH   0x4
#define CM_EXTENT_GAME    0x8
 
// Function Control Register 0 (00h)
#define CHADC0          0x01
#define CHADC1          0x02
#define PAUSE0          0x04
#define PAUSE1          0x08
 
// Function Control Register 0+2 (02h)
#define CHEN0           0x01
#define CHEN1           0x02
#define RST_CH0         0x04
#define RST_CH1         0x08
 
// Function Control Register 1 (04h)
#define JYSTK_EN        0x02
#define UART_EN         0x04
#define SPDO2DAC        0x40
#define SPDFLOOP        0x80
 
// Function Control Register 1+1 (05h)
#define SPDF_0          0x01
#define SPDF_1          0x02
#define ASFC            0xe0
#define DSFC            0x1c
#define SPDIF2DAC       (SPDF_0 << 8 | SPDO2DAC)
 
// Channel Format Register (08h)
#define CM_CFMT_STEREO  0x01
#define CM_CFMT_16BIT   0x02
#define CM_CFMT_MASK    0x03
#define POLVALID        0x20
#define INVSPDIFI       0x80
 
// Channel Format Register+2 (0ah)
#define SPD24SEL        0x20
 
// Channel Format Register+3 (0bh)
#define CHB3D           0x20
#define CHB3D5C         0x80
 
// Interrupt Hold/Clear Register+2 (0eh)
#define CH0_INT_EN      0x01
#define CH1_INT_EN      0x02
 
// Interrupt Register (10h)
#define CHINT0          0x01
#define CHINT1          0x02
#define CH0BUSY         0x04
#define CH1BUSY         0x08
 
// Legacy Control/Status Register+1 (15h)
#define EXBASEN         0x10
#define BASE2LIN        0x20
#define CENTR2LIN       0x40
#define CB2LIN          (BASE2LIN|CENTR2LIN)
#define CHB3D6C         0x80
 
// Legacy Control/Status Register+2 (16h)
#define DAC2SPDO        0x20
#define SPDCOPYRHT      0x40
#define ENSPDOUT        0x80
 
// Legacy Control/Status Register+3 (17h)
#define FMSEL           0x03
#define VSBSEL          0x0c
#define VMPU            0x60
#define NXCHG           0x80
 
// Miscellaneous Control Register (18h)
#define REAR2LIN        0x20
#define MUTECH1         0x40
#define ENCENTER        0x80
 
// Miscellaneous Control Register+1 (19h)
#define SELSPDIFI2      0x01
#define SPDF_AC97       0x80
 
// Miscellaneous Control Register+2 (1ah)
#define AC3_EN          0x04
#define FM_EN           0x08
#define SPD32SEL        0x20
#define XCHGDAC         0x40
#define ENDBDAC         0x80
 
// Miscellaneous Control Register+3 (1bh)
#define SPDIFI48K       0x01
#define SPDO5V          0x02
#define N4SPK3D         0x04
#define RESET           0x40
#define PWD             0x80
#define SPDIF48K        (SPDIFI48K << 24 | SPDF_AC97 << 8)
 
// Mixer1 (24h)
#define CDPLAY          0x01
#define X3DEN           0x02
#define REAR2FRONT      0x10
#define SPK4            0x20
#define WSMUTE          0x40
 
// Miscellaneous Register (27h)
#define SPDVALID        0x02
#define CENTR2MIC       0x04
 
#define CM_CFMT_DACSHIFT   0
#define CM_CFMT_ADCSHIFT   2
#define CM_FREQ_DACSHIFT   2
#define CM_FREQ_ADCSHIFT   5
#define RSTDAC          RST_CH0
#define RSTADC          RST_CH1
#define ENDAC           CHEN0
#define ENADC           CHEN1
#define PAUSEDAC        PAUSE0
#define PAUSEADC        PAUSE1
#define CODEC_CMI_DAC_FRAME1    CODEC_CMI_CH0_FRAME1
#define CODEC_CMI_DAC_FRAME2    CODEC_CMI_CH0_FRAME2
#define CODEC_CMI_ADC_FRAME1    CODEC_CMI_CH1_FRAME1
#define CODEC_CMI_ADC_FRAME2    CODEC_CMI_CH1_FRAME2
#define DACINT          CHINT0
#define ADCINT          CHINT1
#define DACBUSY         CH0BUSY
#define ADCBUSY         CH1BUSY
#define ENDACINT        CH0_INT_EN
#define ENADCINT        CH1_INT_EN
 
static const unsigned sample_size[] = { 1, 2, 2, 4 };
static const unsigned sample_shift[]    = { 0, 1, 1, 2 };
 
/* MIDI buffer sizes **************************/
 
#define MIDIINBUF  256
#define MIDIOUTBUF 256
 
#define FMODE_MIDI_SHIFT 2
#define FMODE_MIDI_READ  (FMODE_READ << FMODE_MIDI_SHIFT)
#define FMODE_MIDI_WRITE (FMODE_WRITE << FMODE_MIDI_SHIFT)
 
#define FMODE_DMFM 0x10
 
#define SND_DEV_DSP16   5 
 
#define NR_DEVICE 3             /* maximum number of devices */
 
static unsigned int devindex = 0;
 
//*********************************************/
 
struct cm_state {
        /* magic */
        unsigned int magic;
 
        /* list of cmedia devices */
        struct list_head devs;
 
        /* the corresponding pci_dev structure */
        struct pci_dev *dev;
 
        int dev_audio;                  /* soundcore stuff */
        int dev_mixer;
        int dev_midi;
        int dev_dmfm;
 
        unsigned int iosb, iobase, iosynth,
                         iomidi, iogame, irq;   /* hardware resources */
        unsigned short deviceid;                /* pci_id */
 
        struct {                                /* mixer stuff */
                unsigned int modcnt;
                unsigned short vol[13];
        } mix;
 
        unsigned int rateadc, ratedac;          /* wave stuff */
        unsigned char fmt, enable;
 
        spinlock_t lock;
        struct semaphore open_sem;
        mode_t open_mode;
        wait_queue_head_t open_wait;
 
        struct dmabuf {
                void *rawbuf;
                unsigned rawphys;
                unsigned buforder;
                unsigned numfrag;
                unsigned fragshift;
                unsigned hwptr, swptr;
                unsigned total_bytes;
                int count;
                unsigned error;         /* over/underrun */
                wait_queue_head_t wait;
 
                unsigned fragsize;      /* redundant, but makes calculations easier */
                unsigned dmasize;
                unsigned fragsamples;
                unsigned dmasamples;
 
                unsigned mapped:1;      /* OSS stuff */
                unsigned ready:1;
                unsigned endcleared:1;
                unsigned ossfragshift;
                int ossmaxfrags;
                unsigned subdivision;
        } dma_dac, dma_adc;
 
        struct {                        /* midi stuff */
                unsigned ird, iwr, icnt;
                unsigned ord, owr, ocnt;
                wait_queue_head_t iwait;
                wait_queue_head_t owait;
                struct timer_list timer;
                unsigned char ibuf[MIDIINBUF];
                unsigned char obuf[MIDIOUTBUF];
        } midi;
 
        struct gameport gameport;
 
        int     chip_version;
        int     max_channels;
        int     curr_channels;
        int     speakers;               /* number of speakers */
        int     capability;             /* HW capability, various for chip versions */
 
        int     status;                 /* HW or SW state */
 
        int     spdif_counter;          /* spdif frame counter */
};
 
/* flags used for capability */
#define CAN_AC3_HW              0x00000001              /* 037 or later */
#define CAN_AC3_SW              0x00000002              /* 033 or later */
#define CAN_AC3                 (CAN_AC3_HW | CAN_AC3_SW)
#define CAN_DUAL_DAC            0x00000004              /* 033 or later */
#define CAN_MULTI_CH_HW         0x00000008              /* 039 or later */
#define CAN_MULTI_CH            (CAN_MULTI_CH_HW | CAN_DUAL_DAC)
#define CAN_LINE_AS_REAR        0x00000010              /* 033 or later */
#define CAN_LINE_AS_BASS        0x00000020              /* 039 or later */
#define CAN_MIC_AS_BASS         0x00000040              /* 039 or later */
 
/* flags used for status */
#define DO_AC3_HW               0x00000001
#define DO_AC3_SW               0x00000002
#define DO_AC3                  (DO_AC3_HW | DO_AC3_SW)
#define DO_DUAL_DAC             0x00000004
#define DO_MULTI_CH_HW          0x00000008
#define DO_MULTI_CH             (DO_MULTI_CH_HW | DO_DUAL_DAC)
#define DO_LINE_AS_REAR         0x00000010              /* 033 or later */
#define DO_LINE_AS_BASS         0x00000020              /* 039 or later */
#define DO_MIC_AS_BASS          0x00000040              /* 039 or later */
#define DO_SPDIF_OUT            0x00000100
#define DO_SPDIF_IN             0x00000200
#define DO_SPDIF_LOOP           0x00000400
 
static LIST_HEAD(devs);
 
/* --------------------------------------------------------------------- */
 
static inline unsigned ld2(unsigned int x)
{
        unsigned exp=16,l=5,r=0;
        static const unsigned num[]={0x2,0x4,0x10,0x100,0x10000};
 
        /* num: 2, 4, 16, 256, 65536 */
        /* exp: 1, 2,  4,   8,    16 */
 
        while(l--) {
                if( x >= num[l] ) {
                        if(num[l]>2) x >>= exp;
                        r+=exp;
                }
                exp>>=1;
        }
 
        return r;
}
 
/* --------------------------------------------------------------------- */
 
static void maskb(unsigned int addr, unsigned int mask, unsigned int value)
{
        outb((inb(addr) & mask) | value, addr);
}
 
static void maskw(unsigned int addr, unsigned int mask, unsigned int value)
{
        outw((inw(addr) & mask) | value, addr);
}
 
static void maskl(unsigned int addr, unsigned int mask, unsigned int value)
{
        outl((inl(addr) & mask) | value, addr);
}
 
static void set_dmadac1(struct cm_state *s, unsigned int addr, unsigned int count)
{
        if (addr)
            outl(addr, s->iobase + CODEC_CMI_ADC_FRAME1);
        outw(count - 1, s->iobase + CODEC_CMI_ADC_FRAME2);
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~CHADC1, 0);
}
 
static void set_dmaadc(struct cm_state *s, unsigned int addr, unsigned int count)
{
        outl(addr, s->iobase + CODEC_CMI_ADC_FRAME1);
        outw(count - 1, s->iobase + CODEC_CMI_ADC_FRAME2);
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~0, CHADC1);
}
 
static void set_dmadac(struct cm_state *s, unsigned int addr, unsigned int count)
{
        outl(addr, s->iobase + CODEC_CMI_DAC_FRAME1);
        outw(count - 1, s->iobase + CODEC_CMI_DAC_FRAME2);
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~CHADC0, 0);
        if (s->status & DO_DUAL_DAC)
                set_dmadac1(s, 0, count);
}
 
static void set_countadc(struct cm_state *s, unsigned count)
{
        outw(count - 1, s->iobase + CODEC_CMI_ADC_FRAME2 + 2);
}
 
static void set_countdac(struct cm_state *s, unsigned count)
{
        outw(count - 1, s->iobase + CODEC_CMI_DAC_FRAME2 + 2);
        if (s->status & DO_DUAL_DAC)
            set_countadc(s, count);
}
 
static unsigned get_dmadac(struct cm_state *s)
{
        unsigned int curr_addr;
 
        curr_addr = inw(s->iobase + CODEC_CMI_DAC_FRAME2) + 1;
        curr_addr <<= sample_shift[(s->fmt >> CM_CFMT_DACSHIFT) & CM_CFMT_MASK];
        curr_addr = s->dma_dac.dmasize - curr_addr;
 
        return curr_addr;
}
 
static unsigned get_dmaadc(struct cm_state *s)
{
        unsigned int curr_addr;
 
        curr_addr = inw(s->iobase + CODEC_CMI_ADC_FRAME2) + 1;
        curr_addr <<= sample_shift[(s->fmt >> CM_CFMT_ADCSHIFT) & CM_CFMT_MASK];
        curr_addr = s->dma_adc.dmasize - curr_addr;
 
        return curr_addr;
}
 
static void wrmixer(struct cm_state *s, unsigned char idx, unsigned char data)
{
        unsigned char regval, pseudo;
 
        // pseudo register
        if (idx == DSP_MIX_AUXVOL_L) {
                data >>= 4;
                data &= 0x0f;
                regval = inb(s->iobase + CODEC_CMI_AUX_VOL) & ~0x0f;
                outb(regval | data, s->iobase + CODEC_CMI_AUX_VOL);
                return;
        }
        if (idx == DSP_MIX_AUXVOL_R) {
                data &= 0xf0;
                regval = inb(s->iobase + CODEC_CMI_AUX_VOL) & ~0xf0;
                outb(regval | data, s->iobase + CODEC_CMI_AUX_VOL);
                return;
        }
        outb(idx, s->iobase + CODEC_SB16_ADDR);
        udelay(10);
        // pseudo bits
        if (idx == DSP_MIX_OUTMIXIDX) {
                pseudo = data & ~0x1f;
                pseudo >>= 1;
                regval = inb(s->iobase + CODEC_CMI_MIXER2) & ~0x30;
                outb(regval | pseudo, s->iobase + CODEC_CMI_MIXER2);
        }
        if (idx == DSP_MIX_ADCMIXIDX_L) {
                pseudo = data & 0x80;
                pseudo >>= 1;
                regval = inb(s->iobase + CODEC_CMI_MIXER2) & ~0x40;
                outb(regval | pseudo, s->iobase + CODEC_CMI_MIXER2);
        }
        if (idx == DSP_MIX_ADCMIXIDX_R) {
                pseudo = data & 0x80;
                regval = inb(s->iobase + CODEC_CMI_MIXER2) & ~0x80;
                outb(regval | pseudo, s->iobase + CODEC_CMI_MIXER2);
        }
        outb(data, s->iobase + CODEC_SB16_DATA);
        udelay(10);
}
 
static unsigned char rdmixer(struct cm_state *s, unsigned char idx)
{
        unsigned char v, pseudo;
 
        // pseudo register
        if (idx == DSP_MIX_AUXVOL_L) {
                v = inb(s->iobase + CODEC_CMI_AUX_VOL) & 0x0f;
                v <<= 4;
                return v;
        }
        if (idx == DSP_MIX_AUXVOL_L) {
                v = inb(s->iobase + CODEC_CMI_AUX_VOL) & 0xf0;
                return v;
        }
        outb(idx, s->iobase + CODEC_SB16_ADDR);
        udelay(10);
        v = inb(s->iobase + CODEC_SB16_DATA);
        udelay(10);
        // pseudo bits
        if (idx == DSP_MIX_OUTMIXIDX) {
                pseudo = inb(s->iobase + CODEC_CMI_MIXER2) & 0x30;
                pseudo <<= 1;
                v |= pseudo;
        }
        if (idx == DSP_MIX_ADCMIXIDX_L) {
                pseudo = inb(s->iobase + CODEC_CMI_MIXER2) & 0x40;
                pseudo <<= 1;
                v |= pseudo;
        }
        if (idx == DSP_MIX_ADCMIXIDX_R) {
                pseudo = inb(s->iobase + CODEC_CMI_MIXER2) & 0x80;
                v |= pseudo;
        }
        return v;
}
 
static void set_fmt_unlocked(struct cm_state *s, unsigned char mask, unsigned char data)
{
        if (mask)
        {
                s->fmt = inb(s->iobase + CODEC_CMI_CHFORMAT);
                udelay(10);
        }
        s->fmt = (s->fmt & mask) | data;
        outb(s->fmt, s->iobase + CODEC_CMI_CHFORMAT);
        udelay(10);
}
 
static void set_fmt(struct cm_state *s, unsigned char mask, unsigned char data)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        set_fmt_unlocked(s,mask,data);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static void frobindir(struct cm_state *s, unsigned char idx, unsigned char mask, unsigned char data)
{
        outb(idx, s->iobase + CODEC_SB16_ADDR);
        udelay(10);
        outb((inb(s->iobase + CODEC_SB16_DATA) & mask) | data, s->iobase + CODEC_SB16_DATA);
        udelay(10);
}
 
static struct {
        unsigned        rate;
        unsigned        lower;
        unsigned        upper;
        unsigned char   freq;
} rate_lookup[] =
{
        { 5512,         (0 + 5512) / 2,          (5512 + 8000) / 2,      0 },
        { 8000,         (5512 + 8000) / 2,      (8000 + 11025) / 2,     4 },
        { 11025,        (8000 + 11025) / 2,     (11025 + 16000) / 2,    1 },
        { 16000,        (11025 + 16000) / 2,    (16000 + 22050) / 2,    5 },
        { 22050,        (16000 + 22050) / 2,    (22050 + 32000) / 2,    2 },
        { 32000,        (22050 + 32000) / 2,    (32000 + 44100) / 2,    6 },
        { 44100,        (32000 + 44100) / 2,    (44100 + 48000) / 2,    3 },
        { 48000,        (44100 + 48000) / 2,    48000,                  7 }
};
 
static void set_spdif_copyright(struct cm_state *s, int spdif_copyright)
{
        /* enable SPDIF-in Copyright */
        maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 2, ~SPDCOPYRHT, spdif_copyright ? SPDCOPYRHT : 0);
}
 
static void set_spdif_loop(struct cm_state *s, int spdif_loop)
{
        /* enable SPDIF loop */
        if (spdif_loop) {
                s->status |= DO_SPDIF_LOOP;
                /* turn on spdif-in to spdif-out */
                maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~0, SPDFLOOP);
        } else {
                s->status &= ~DO_SPDIF_LOOP;
                /* turn off spdif-in to spdif-out */
                maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~SPDFLOOP, 0);
        }
}
 
static void set_spdif_monitor(struct cm_state *s, int channel)
{
        // SPDO2DAC
        maskw(s->iobase + CODEC_CMI_FUNCTRL1, ~SPDO2DAC, channel == 2 ? SPDO2DAC : 0);
        // CDPLAY
        if (s->chip_version >= 39)
                maskb(s->iobase + CODEC_CMI_MIXER1, ~CDPLAY, channel ? CDPLAY : 0);
}
 
static void set_spdifout_level(struct cm_state *s, int level5v)
{
        /* SPDO5V */
        maskb(s->iobase + CODEC_CMI_MISC_CTRL + 3, ~SPDO5V, level5v ? SPDO5V : 0);
}
 
static void set_spdifin_inverse(struct cm_state *s, int spdif_inverse)
{
        if (spdif_inverse) {
                /* turn on spdif-in inverse */
                if (s->chip_version >= 39)
                        maskb(s->iobase + CODEC_CMI_CHFORMAT, ~0, INVSPDIFI);
                else
                        maskb(s->iobase + CODEC_CMI_CHFORMAT + 2, ~0, 1);
        } else {
                /* turn off spdif-ininverse */
                if (s->chip_version >= 39)
                        maskb(s->iobase + CODEC_CMI_CHFORMAT, ~INVSPDIFI, 0);
                else
                        maskb(s->iobase + CODEC_CMI_CHFORMAT + 2, ~1, 0);
        }
}
 
static void set_spdifin_channel2(struct cm_state *s, int channel2)
{
        /* SELSPDIFI2 */
        if (s->chip_version >= 39)
                maskb(s->iobase + CODEC_CMI_MISC_CTRL + 1, ~SELSPDIFI2, channel2 ? SELSPDIFI2 : 0);
}
 
static void set_spdifin_valid(struct cm_state *s, int valid)
{
        /* SPDVALID */
        maskb(s->iobase + CODEC_CMI_MISC, ~SPDVALID, valid ? SPDVALID : 0);
}
 
static void set_spdifout_unlocked(struct cm_state *s, unsigned rate)
{
        if (rate == 48000 || rate == 44100) {
                // SPDF_0
                maskw(s->iobase + CODEC_CMI_FUNCTRL1, ~0, SPDF_0);
                // SPDIFI48K SPDF_ACc97
                maskl(s->iobase + CODEC_CMI_MISC_CTRL, ~SPDIF48K, rate == 48000 ? SPDIF48K : 0);
                // ENSPDOUT
                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 2, ~0, ENSPDOUT);
                // monitor SPDIF out
                set_spdif_monitor(s, 2);
                s->status |= DO_SPDIF_OUT;
        } else {
                maskw(s->iobase + CODEC_CMI_FUNCTRL1, ~SPDF_0, 0);
                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 2, ~ENSPDOUT, 0);
                // monitor none
                set_spdif_monitor(s, 0);
                s->status &= ~DO_SPDIF_OUT;
        }
}
 
static void set_spdifout(struct cm_state *s, unsigned rate)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        set_spdifout_unlocked(s,rate);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static void set_spdifin_unlocked(struct cm_state *s, unsigned rate)
{
        if (rate == 48000 || rate == 44100) {
                // SPDF_1
                maskw(s->iobase + CODEC_CMI_FUNCTRL1, ~0, SPDF_1);
                // SPDIFI48K SPDF_AC97
                maskl(s->iobase + CODEC_CMI_MISC_CTRL, ~SPDIF48K, rate == 48000 ? SPDIF48K : 0);
                s->status |= DO_SPDIF_IN;
        } else {
                maskw(s->iobase + CODEC_CMI_FUNCTRL1, ~SPDF_1, 0);
                s->status &= ~DO_SPDIF_IN;
        }
}
 
static void set_spdifin(struct cm_state *s, unsigned rate)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        set_spdifin_unlocked(s,rate);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
//* find parity for bit 4~30 */
static unsigned parity(unsigned data)
{
        unsigned parity = 0;
        int counter = 4;
 
        data >>= 4;     // start from bit 4
        while (counter <= 30) {
                if (data & 1)
                        parity++;
                data >>= 1;
                counter++;
        }
        return parity & 1;
}
 
static void set_ac3_unlocked(struct cm_state *s, unsigned rate)
{
        /* enable AC3 */
        if (rate == 48000 || rate == 44100) {
                // mute DAC
                maskb(s->iobase + CODEC_CMI_MIXER1, ~0, WSMUTE);
                // AC3EN for 039, 0x04
                if (s->chip_version >= 39)
                        maskb(s->iobase + CODEC_CMI_MISC_CTRL + 2, ~0, AC3_EN);
                // AC3EN for 037, 0x10
                else if (s->chip_version == 37)
                        maskb(s->iobase + CODEC_CMI_CHFORMAT + 2, ~0, 0x10);
                if (s->capability & CAN_AC3_HW) {
                        // SPD24SEL for 039, 0x20, but cannot be set
                        if (s->chip_version >= 39)
                                maskb(s->iobase + CODEC_CMI_CHFORMAT + 2, ~0, SPD24SEL);
                        // SPD24SEL for 037, 0x02
                        else if (s->chip_version == 37)
                                maskb(s->iobase + CODEC_CMI_CHFORMAT + 2, ~0, 0x02);
                        s->status |= DO_AC3_HW;
                        if (s->chip_version >= 39)
                                maskb(s->iobase + CODEC_CMI_MIXER1, ~CDPLAY, 0);
                 } else {
                        // SPD32SEL for 037 & 039, 0x20
                        maskb(s->iobase + CODEC_CMI_MISC_CTRL + 2, ~0, SPD32SEL);
                        // set 176K sample rate to fix 033 HW bug
                        if (s->chip_version == 33) {
                                if (rate == 48000)
                                        maskb(s->iobase + CODEC_CMI_CHFORMAT + 1, ~0, 0x08);
                                else
                                        maskb(s->iobase + CODEC_CMI_CHFORMAT + 1, ~0x08, 0);
                        }
                        s->status |= DO_AC3_SW;
                }
        } else {
                maskb(s->iobase + CODEC_CMI_MIXER1, ~WSMUTE, 0);
                maskb(s->iobase + CODEC_CMI_CHFORMAT + 2, ~0x32, 0);
                maskb(s->iobase + CODEC_CMI_MISC_CTRL + 2, ~(SPD32SEL|AC3_EN), 0);
                if (s->chip_version == 33)
                        maskb(s->iobase + CODEC_CMI_CHFORMAT + 1, ~0x08, 0);
                if (s->chip_version >= 39)
                        maskb(s->iobase + CODEC_CMI_MIXER1, ~0, CDPLAY);
                s->status &= ~DO_AC3;
        }
        s->spdif_counter = 0;
}
 
static void set_ac3(struct cm_state *s, unsigned rate)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        set_spdifout_unlocked(s, rate);
        set_ac3_unlocked(s,rate);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static int trans_ac3(struct cm_state *s, void *dest, const char *source, int size)
{
        int   i = size / 2;
        unsigned long data;
        unsigned long *dst = (unsigned long *) dest;
        unsigned short *src = (unsigned short *)source;
        int err;
 
        do {
                if ((err = __get_user(data, src)))
                        return err;
                src++;
                data <<= 12;                    // ok for 16-bit data
                if (s->spdif_counter == 2 || s->spdif_counter == 3)
                        data |= 0x40000000;     // indicate AC-3 raw data
                if (parity(data))
                        data |= 0x80000000;     // parity
                if (s->spdif_counter == 0)
                        data |= 3;              // preamble 'M'
                else if (s->spdif_counter & 1)
                        data |= 5;              // odd, 'W'
                else
                        data |= 9;              // even, 'M'
                *dst++ = data;
                s->spdif_counter++;
                if (s->spdif_counter == 384)
                        s->spdif_counter = 0;
        } while (--i);
 
        return 0;
}
 
static void set_adc_rate_unlocked(struct cm_state *s, unsigned rate)
{
        unsigned char freq = 4;
        int     i;
 
        if (rate > 48000)
                rate = 48000;
        if (rate < 8000)
                rate = 8000;
        for (i = 0; i < sizeof(rate_lookup) / sizeof(rate_lookup[0]); i++) {
                if (rate > rate_lookup[i].lower && rate <= rate_lookup[i].upper) {
                        rate = rate_lookup[i].rate;
                        freq = rate_lookup[i].freq;
                        break;
                }
        }
        s->rateadc = rate;
        freq <<= CM_FREQ_ADCSHIFT;
 
        maskb(s->iobase + CODEC_CMI_FUNCTRL1 + 1, ~ASFC, freq);
}
 
static void set_adc_rate(struct cm_state *s, unsigned rate)
{
        unsigned long flags;
        unsigned char freq = 4;
        int     i;
 
        if (rate > 48000)
                rate = 48000;
        if (rate < 8000)
                rate = 8000;
        for (i = 0; i < sizeof(rate_lookup) / sizeof(rate_lookup[0]); i++) {
                if (rate > rate_lookup[i].lower && rate <= rate_lookup[i].upper) {
                        rate = rate_lookup[i].rate;
                        freq = rate_lookup[i].freq;
                        break;
                }
        }
        s->rateadc = rate;
        freq <<= CM_FREQ_ADCSHIFT;
 
        spin_lock_irqsave(&s->lock, flags);
        maskb(s->iobase + CODEC_CMI_FUNCTRL1 + 1, ~ASFC, freq);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static void set_dac_rate(struct cm_state *s, unsigned rate)
{
        unsigned long flags;
        unsigned char freq = 4;
        int     i;
 
        if (rate > 48000)
                rate = 48000;
        if (rate < 8000)
                rate = 8000;
        for (i = 0; i < sizeof(rate_lookup) / sizeof(rate_lookup[0]); i++) {
                if (rate > rate_lookup[i].lower && rate <= rate_lookup[i].upper) {
                        rate = rate_lookup[i].rate;
                        freq = rate_lookup[i].freq;
                        break;
                }
        }
        s->ratedac = rate;
        freq <<= CM_FREQ_DACSHIFT;
 
        spin_lock_irqsave(&s->lock, flags);
        maskb(s->iobase + CODEC_CMI_FUNCTRL1 + 1, ~DSFC, freq);
        spin_unlock_irqrestore(&s->lock, flags);
 
        if (s->curr_channels <=  2)
                set_spdifout(s, rate);
        if (s->status & DO_DUAL_DAC)
                set_adc_rate(s, rate);
}
 
/* --------------------------------------------------------------------- */
static inline void reset_adc(struct cm_state *s)
{
        /* reset bus master */
        outb(s->enable | RSTADC, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
        udelay(10);
        outb(s->enable & ~RSTADC, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
}
 
static inline void reset_dac(struct cm_state *s)
{
        /* reset bus master */
        outb(s->enable | RSTDAC, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
        udelay(10);
        outb(s->enable & ~RSTDAC, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
        if (s->status & DO_DUAL_DAC)
                reset_adc(s);
}
 
static inline void pause_adc(struct cm_state *s)
{
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~0, PAUSEADC);
}
 
static inline void pause_dac(struct cm_state *s)
{
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~0, PAUSEDAC);
        if (s->status & DO_DUAL_DAC)
                pause_adc(s);
}
 
static inline void disable_adc(struct cm_state *s)
{
        /* disable channel */
        s->enable &= ~ENADC;
        outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
        reset_adc(s);
}
 
static inline void disable_dac(struct cm_state *s)
{
        /* disable channel */
        s->enable &= ~ENDAC;
        outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
        reset_dac(s);
        if (s->status & DO_DUAL_DAC)
                disable_adc(s);
}
 
static inline void enable_adc(struct cm_state *s)
{
        if (!(s->enable & ENADC)) {
                /* enable channel */
                s->enable |= ENADC;
                outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
        }
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~PAUSEADC, 0);
}
 
static inline void enable_dac_unlocked(struct cm_state *s)
{
        if (!(s->enable & ENDAC)) {
                /* enable channel */
                s->enable |= ENDAC;
                outb(s->enable, s->iobase + CODEC_CMI_FUNCTRL0 + 2);
        }
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~PAUSEDAC, 0);
 
        if (s->status & DO_DUAL_DAC)
                enable_adc(s);
}
 
static inline void enable_dac(struct cm_state *s)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        enable_dac_unlocked(s);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static inline void stop_adc_unlocked(struct cm_state *s)
{
        if (s->enable & ENADC) {
                /* disable interrupt */
                maskb(s->iobase + CODEC_CMI_INT_HLDCLR + 2, ~ENADCINT, 0);
                disable_adc(s);
        }
}
 
static inline void stop_adc(struct cm_state *s)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        stop_adc_unlocked(s);
        spin_unlock_irqrestore(&s->lock, flags);
 
}
 
static inline void stop_dac_unlocked(struct cm_state *s)
{
        if (s->enable & ENDAC) {
                /* disable interrupt */
                maskb(s->iobase + CODEC_CMI_INT_HLDCLR + 2, ~ENDACINT, 0);
                disable_dac(s);
        }
        if (s->status & DO_DUAL_DAC)
                stop_adc_unlocked(s);
}
 
static inline void stop_dac(struct cm_state *s)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        stop_dac_unlocked(s);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static inline void start_adc_unlocked(struct cm_state *s)
{
        if ((s->dma_adc.mapped || s->dma_adc.count < (signed)(s->dma_adc.dmasize - 2*s->dma_adc.fragsize))
            && s->dma_adc.ready) {
                /* enable interrupt */
                maskb(s->iobase + CODEC_CMI_INT_HLDCLR + 2, ~0, ENADCINT);
                enable_adc(s);
        }
}
 
static void start_adc(struct cm_state *s)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        start_adc_unlocked(s);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static void start_dac1_unlocked(struct cm_state *s)
{
        if ((s->dma_adc.mapped || s->dma_adc.count > 0) && s->dma_adc.ready) {
                /* enable interrupt */
                maskb(s->iobase + CODEC_CMI_INT_HLDCLR + 2, ~0, ENADCINT);
                enable_dac_unlocked(s);
        }
}
 
static void start_dac_unlocked(struct cm_state *s)
{
        if ((s->dma_dac.mapped || s->dma_dac.count > 0) && s->dma_dac.ready) {
                /* enable interrupt */
                maskb(s->iobase + CODEC_CMI_INT_HLDCLR + 2, ~0, ENDACINT);
                enable_dac_unlocked(s);
        }
        if (s->status & DO_DUAL_DAC)
                start_dac1_unlocked(s);
}
 
static void start_dac(struct cm_state *s)
{
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        start_dac_unlocked(s);
        spin_unlock_irqrestore(&s->lock, flags);
}
 
static int prog_dmabuf(struct cm_state *s, unsigned rec);
 
static int set_dac_channels(struct cm_state *s, int channels)
{
        unsigned long flags;
        spin_lock_irqsave(&s->lock, flags);
 
        if ((channels > 2) && (channels <= s->max_channels)
         && (((s->fmt >> CM_CFMT_DACSHIFT) & CM_CFMT_MASK) == (CM_CFMT_STEREO | CM_CFMT_16BIT))) {
            set_spdifout_unlocked(s, 0);
            if (s->capability & CAN_MULTI_CH_HW) {
                // NXCHG
                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 3, ~0, NXCHG);
                // CHB3D or CHB3D5C
                maskb(s->iobase + CODEC_CMI_CHFORMAT + 3, ~(CHB3D5C|CHB3D), channels > 4 ? CHB3D5C : CHB3D);
                // CHB3D6C
                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 1, ~CHB3D6C, channels == 6 ? CHB3D6C : 0);
                // ENCENTER 
                maskb(s->iobase + CODEC_CMI_MISC_CTRL, ~ENCENTER, channels == 6 ? ENCENTER : 0);
                s->status |= DO_MULTI_CH_HW;
            } else if (s->capability & CAN_DUAL_DAC) {
                unsigned char fmtm = ~0, fmts = 0;
                ssize_t ret;
 
                // ENDBDAC, turn on double DAC mode
                // XCHGDAC, CH0 -> back, CH1->front
                maskb(s->iobase + CODEC_CMI_MISC_CTRL + 2, ~0, ENDBDAC|XCHGDAC);
                s->status |= DO_DUAL_DAC;
                // prepare secondary buffer
 
                spin_unlock_irqrestore(&s->lock, flags);
                ret = prog_dmabuf(s, 1);
                if (ret) return ret;
                spin_lock_irqsave(&s->lock, flags);
 
                // copy the hw state
                fmtm &= ~((CM_CFMT_STEREO | CM_CFMT_16BIT) << CM_CFMT_DACSHIFT);
                fmtm &= ~((CM_CFMT_STEREO | CM_CFMT_16BIT) << CM_CFMT_ADCSHIFT);
                // the HW only support 16-bit stereo
                fmts |= CM_CFMT_16BIT << CM_CFMT_DACSHIFT;
                fmts |= CM_CFMT_16BIT << CM_CFMT_ADCSHIFT;
                fmts |= CM_CFMT_STEREO << CM_CFMT_DACSHIFT;
                fmts |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
 
                set_fmt_unlocked(s, fmtm, fmts);
                set_adc_rate_unlocked(s, s->ratedac);
 
            }
 
            // N4SPK3D, disable 4 speaker mode (analog duplicate)
            if (s->speakers > 2)
                maskb(s->iobase + CODEC_CMI_MISC_CTRL + 3, ~N4SPK3D, 0);
            s->curr_channels = channels;
        } else {
            if (s->status & DO_MULTI_CH_HW) {
                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 3, ~NXCHG, 0);
                maskb(s->iobase + CODEC_CMI_CHFORMAT + 3, ~(CHB3D5C|CHB3D), 0);
                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 1, ~CHB3D6C, 0);
            } else if (s->status & DO_DUAL_DAC) {
                maskb(s->iobase + CODEC_CMI_MISC_CTRL + 2, ~ENDBDAC, 0);
            }
            // N4SPK3D, enable 4 speaker mode (analog duplicate)
            if (s->speakers > 2)
                maskb(s->iobase + CODEC_CMI_MISC_CTRL + 3, ~0, N4SPK3D);
            s->status &= ~DO_MULTI_CH;
            s->curr_channels = s->fmt & (CM_CFMT_STEREO << CM_CFMT_DACSHIFT) ? 2 : 1;
        }
 
        spin_unlock_irqrestore(&s->lock, flags);
        return s->curr_channels;
}
 
/* --------------------------------------------------------------------- */
 
#define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
#define DMABUF_MINORDER 1
 
static void dealloc_dmabuf(struct dmabuf *db)
{
        struct page *pstart, *pend;
 
        if (db->rawbuf) {
                /* undo marking the pages as reserved */
                pend = virt_to_page(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
                for (pstart = virt_to_page(db->rawbuf); pstart <= pend; pstart++)
                        mem_map_unreserve(pstart);
                free_pages((unsigned long)db->rawbuf, db->buforder);
        }
        db->rawbuf = NULL;
        db->mapped = db->ready = 0;
}
 
/* Ch1 is used for playback, Ch0 is used for recording */
 
static int prog_dmabuf(struct cm_state *s, unsigned rec)
{
        struct dmabuf *db = rec ? &s->dma_adc : &s->dma_dac;
        unsigned rate = rec ? s->rateadc : s->ratedac;
        int order;
        unsigned bytepersec;
        unsigned bufs;
        struct page *pstart, *pend;
        unsigned char fmt;
        unsigned long flags;
 
        fmt = s->fmt;
        if (rec) {
                stop_adc(s);
                fmt >>= CM_CFMT_ADCSHIFT;
        } else {
                stop_dac(s);
                fmt >>= CM_CFMT_DACSHIFT;
        }
 
        fmt &= CM_CFMT_MASK;
        db->hwptr = db->swptr = db->total_bytes = db->count = db->error = db->endcleared = 0;
        if (!db->rawbuf) {
                db->ready = db->mapped = 0;
                for (order = DMABUF_DEFAULTORDER; order >= DMABUF_MINORDER; order--)
                        if ((db->rawbuf = (void *)__get_free_pages(GFP_KERNEL | GFP_DMA, order)))
                                break;
                if (!db->rawbuf)
                        return -ENOMEM;
                db->buforder = order;
                db->rawphys = virt_to_bus(db->rawbuf);
                if ((db->rawphys ^ (db->rawphys + (PAGE_SIZE << db->buforder) - 1)) & ~0xffff)
                        printk(KERN_DEBUG "cmpci: DMA buffer crosses 64k boundary: busaddr 0x%lx  size %ld\n",
                               (long) db->rawphys, PAGE_SIZE << db->buforder);
                if ((db->rawphys + (PAGE_SIZE << db->buforder) - 1) & ~0xffffff)
                        printk(KERN_DEBUG "cmpci: DMA buffer beyond 16MB: busaddr 0x%lx  size %ld\n",
                               (long) db->rawphys, PAGE_SIZE << db->buforder);
                /* now mark the pages as reserved; otherwise remap_page_range doesn't do what we want */
                pend = virt_to_page(db->rawbuf + (PAGE_SIZE << db->buforder) - 1);
                for (pstart = virt_to_page(db->rawbuf); pstart <= pend; pstart++)
                        mem_map_reserve(pstart);
        }
        bytepersec = rate << sample_shift[fmt];
        bufs = PAGE_SIZE << db->buforder;
        if (db->ossfragshift) {
                if ((1000 << db->ossfragshift) < bytepersec)
                        db->fragshift = ld2(bytepersec/1000);
                else
                        db->fragshift = db->ossfragshift;
        } else {
                db->fragshift = ld2(bytepersec/100/(db->subdivision ? db->subdivision : 1));
                if (db->fragshift < 3)
                        db->fragshift = 3;
        }
        db->numfrag = bufs >> db->fragshift;
        while (db->numfrag < 4 && db->fragshift > 3) {
                db->fragshift--;
                db->numfrag = bufs >> db->fragshift;
        }
        db->fragsize = 1 << db->fragshift;
        if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
                db->numfrag = db->ossmaxfrags;
        /* to make fragsize >= 4096 */
        db->fragsamples = db->fragsize >> sample_shift[fmt];
        db->dmasize = db->numfrag << db->fragshift;
        db->dmasamples = db->dmasize >> sample_shift[fmt];
        memset(db->rawbuf, (fmt & CM_CFMT_16BIT) ? 0 : 0x80, db->dmasize);
        spin_lock_irqsave(&s->lock, flags);
        if (rec) {
                if (s->status & DO_DUAL_DAC)
                    set_dmadac1(s, db->rawphys, db->dmasize >> sample_shift[fmt]);
                else
                    set_dmaadc(s, db->rawphys, db->dmasize >> sample_shift[fmt]);
                /* program sample counts */
                set_countdac(s, db->fragsamples);
        } else {
                set_dmadac(s, db->rawphys, db->dmasize >> sample_shift[fmt]);
                /* program sample counts */
                set_countdac(s, db->fragsamples);
        }
        spin_unlock_irqrestore(&s->lock, flags);
        db->ready = 1;
        return 0;
}
 
static inline void clear_advance(struct cm_state *s)
{
        unsigned char c = (s->fmt & (CM_CFMT_16BIT << CM_CFMT_DACSHIFT)) ? 0 : 0x80;
        unsigned char *buf = s->dma_dac.rawbuf;
        unsigned char *buf1 = s->dma_adc.rawbuf;
        unsigned bsize = s->dma_dac.dmasize;
        unsigned bptr = s->dma_dac.swptr;
        unsigned len = s->dma_dac.fragsize;
 
        if (bptr + len > bsize) {
                unsigned x = bsize - bptr;
                memset(buf + bptr, c, x);
                if (s->status & DO_DUAL_DAC)
                        memset(buf1 + bptr, c, x);
                bptr = 0;
                len -= x;
        }
        memset(buf + bptr, c, len);
        if (s->status & DO_DUAL_DAC)
                memset(buf1 + bptr, c, len);
}
 
/* call with spinlock held! */
static void cm_update_ptr(struct cm_state *s)
{
        unsigned hwptr;
        int diff;
 
        /* update ADC pointer */
        if (s->dma_adc.ready) {
            if (s->status & DO_DUAL_DAC) {
                hwptr = get_dmaadc(s) % s->dma_adc.dmasize;
                diff = (s->dma_adc.dmasize + hwptr - s->dma_adc.hwptr) % s->dma_adc.dmasize;
                s->dma_adc.hwptr = hwptr;
                s->dma_adc.total_bytes += diff;
                if (s->dma_adc.mapped) {
                        s->dma_adc.count += diff;
                        if (s->dma_adc.count >= (signed)s->dma_adc.fragsize)
                                wake_up(&s->dma_adc.wait);
                } else {
                        s->dma_adc.count -= diff;
                        if (s->dma_adc.count <= 0) {
                                pause_adc(s);
                                s->dma_adc.error++;
                        } else if (s->dma_adc.count <= (signed)s->dma_adc.fragsize && !s->dma_adc.endcleared) {
                                clear_advance(s);
                                s->dma_adc.endcleared = 1;
                        }
                        if (s->dma_dac.count + (signed)s->dma_dac.fragsize <= (signed)s->dma_dac.dmasize)
                                wake_up(&s->dma_adc.wait);
                }
            } else {
                hwptr = get_dmaadc(s) % s->dma_adc.dmasize;
                diff = (s->dma_adc.dmasize + hwptr - s->dma_adc.hwptr) % s->dma_adc.dmasize;
                s->dma_adc.hwptr = hwptr;
                s->dma_adc.total_bytes += diff;
                s->dma_adc.count += diff;
                if (s->dma_adc.count >= (signed)s->dma_adc.fragsize)
                        wake_up(&s->dma_adc.wait);
                if (!s->dma_adc.mapped) {
                        if (s->dma_adc.count > (signed)(s->dma_adc.dmasize - ((3 * s->dma_adc.fragsize) >> 1))) {
                                pause_adc(s);
                                s->dma_adc.error++;
                        }
                }
            }
        }
        /* update DAC pointer */
        if (s->dma_dac.ready) {
                hwptr = get_dmadac(s) % s->dma_dac.dmasize;
                diff = (s->dma_dac.dmasize + hwptr - s->dma_dac.hwptr) % s->dma_dac.dmasize;
                s->dma_dac.hwptr = hwptr;
                s->dma_dac.total_bytes += diff;
                if (s->dma_dac.mapped) {
                        s->dma_dac.count += diff;
                        if (s->dma_dac.count >= (signed)s->dma_dac.fragsize)
                                wake_up(&s->dma_dac.wait);
                } else {
                        s->dma_dac.count -= diff;
                        if (s->dma_dac.count <= 0) {
                                pause_dac(s);
                                s->dma_dac.error++;
                        } else if (s->dma_dac.count <= (signed)s->dma_dac.fragsize && !s->dma_dac.endcleared) {
                                clear_advance(s);
                                s->dma_dac.endcleared = 1;
                        }
                        if (s->dma_dac.count + (signed)s->dma_dac.fragsize <= (signed)s->dma_dac.dmasize)
                                wake_up(&s->dma_dac.wait);
                }
        }
}
 
#ifdef CONFIG_SOUND_CMPCI_MIDI
/* hold spinlock for the following! */
static void cm_handle_midi(struct cm_state *s)
{
        unsigned char ch;
        int wake;
 
        wake = 0;
        while (!(inb(s->iomidi+1) & 0x80)) {
                ch = inb(s->iomidi);
                if (s->midi.icnt < MIDIINBUF) {
                        s->midi.ibuf[s->midi.iwr] = ch;
                        s->midi.iwr = (s->midi.iwr + 1) % MIDIINBUF;
                        s->midi.icnt++;
                }
                wake = 1;
        }
        if (wake)
                wake_up(&s->midi.iwait);
        wake = 0;
        while (!(inb(s->iomidi+1) & 0x40) && s->midi.ocnt > 0) {
                outb(s->midi.obuf[s->midi.ord], s->iomidi);
                s->midi.ord = (s->midi.ord + 1) % MIDIOUTBUF;
                s->midi.ocnt--;
                if (s->midi.ocnt < MIDIOUTBUF-16)
                        wake = 1;
        }
        if (wake)
                wake_up(&s->midi.owait);
}
#endif
 
static void cm_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
        struct cm_state *s = (struct cm_state *)dev_id;
        unsigned int intsrc, intstat;
        unsigned char mask = 0;
 
        /* fastpath out, to ease interrupt sharing */
        intsrc = inl(s->iobase + CODEC_CMI_INT_STATUS);
        if (!(intsrc & 0x80000000))
                return;
        spin_lock(&s->lock);
        intstat = inb(s->iobase + CODEC_CMI_INT_HLDCLR + 2);
        /* acknowledge interrupt */
        if (intsrc & ADCINT)
                mask |= ENADCINT;
        if (intsrc & DACINT)
                mask |= ENDACINT;
        outb(intstat & ~mask, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
        outb(intstat | mask, s->iobase + CODEC_CMI_INT_HLDCLR + 2);
        cm_update_ptr(s);
#ifdef CONFIG_SOUND_CMPCI_MIDI
        cm_handle_midi(s);
#endif
        spin_unlock(&s->lock);
}
 
#ifdef CONFIG_SOUND_CMPCI_MIDI
static void cm_midi_timer(unsigned long data)
{
        struct cm_state *s = (struct cm_state *)data;
        unsigned long flags;
 
        spin_lock_irqsave(&s->lock, flags);
        cm_handle_midi(s);
        spin_unlock_irqrestore(&s->lock, flags);
        s->midi.timer.expires = jiffies+1;
        add_timer(&s->midi.timer);
}
#endif
 
/* --------------------------------------------------------------------- */
 
static const char invalid_magic[] = KERN_CRIT "cmpci: invalid magic value\n";
 
#ifdef CONFIG_SOUND_CMPCI       /* support multiple chips */
#define VALIDATE_STATE(s)
#else
#define VALIDATE_STATE(s)                         \
({                                                \
        if (!(s) || (s)->magic != CM_MAGIC) { \
                printk(invalid_magic);            \
                return -ENXIO;                    \
        }                                         \
})
#endif
 
/* --------------------------------------------------------------------- */
 
#define MT_4          1
#define MT_5MUTE      2
#define MT_4MUTEMONO  3
#define MT_6MUTE      4
#define MT_5MUTEMONO  5
 
static const struct {
        unsigned left;
        unsigned right;
        unsigned type;
        unsigned rec;
        unsigned play;
} mixtable[SOUND_MIXER_NRDEVICES] = {
        [SOUND_MIXER_CD]     = { DSP_MIX_CDVOLIDX_L,     DSP_MIX_CDVOLIDX_R,     MT_5MUTE,     0x04, 0x02 },
        [SOUND_MIXER_LINE]   = { DSP_MIX_LINEVOLIDX_L,   DSP_MIX_LINEVOLIDX_R,   MT_5MUTE,     0x10, 0x08 },
        [SOUND_MIXER_MIC]    = { DSP_MIX_MICVOLIDX,      DSP_MIX_MICVOLIDX,      MT_5MUTEMONO, 0x01, 0x01 },
        [SOUND_MIXER_SYNTH]  = { DSP_MIX_FMVOLIDX_L,     DSP_MIX_FMVOLIDX_R,     MT_5MUTE,     0x40, 0x00 },
        [SOUND_MIXER_VOLUME] = { DSP_MIX_MASTERVOLIDX_L, DSP_MIX_MASTERVOLIDX_R, MT_5MUTE,     0x00, 0x00 },
        [SOUND_MIXER_PCM]    = { DSP_MIX_VOICEVOLIDX_L,  DSP_MIX_VOICEVOLIDX_R,  MT_5MUTE,     0x00, 0x00 },
        [SOUND_MIXER_LINE1]  = { DSP_MIX_AUXVOL_L,       DSP_MIX_AUXVOL_R,       MT_5MUTE,     0x80, 0x20 },
        [SOUND_MIXER_SPEAKER]= { DSP_MIX_SPKRVOLIDX,     DSP_MIX_SPKRVOLIDX,     MT_5MUTEMONO, 0x01, 0x01 }
};
 
static const unsigned char volidx[SOUND_MIXER_NRDEVICES] =
{
        [SOUND_MIXER_CD]     = 1,
        [SOUND_MIXER_LINE]   = 2,
        [SOUND_MIXER_MIC]    = 3,
        [SOUND_MIXER_SYNTH]  = 4,
        [SOUND_MIXER_VOLUME] = 5,
        [SOUND_MIXER_PCM]    = 6,
        [SOUND_MIXER_LINE1]  = 7,
        [SOUND_MIXER_SPEAKER]= 8
};
 
static unsigned mixer_outmask(struct cm_state *s)
{
        unsigned long flags;
        int i, j, k;
 
        spin_lock_irqsave(&s->lock, flags);
        j = rdmixer(s, DSP_MIX_OUTMIXIDX);
        spin_unlock_irqrestore(&s->lock, flags);
        for (k = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                if (j & mixtable[i].play)
                        k |= 1 << i;
        return k;
}
 
static unsigned mixer_recmask(struct cm_state *s)
{
        unsigned long flags;
        int i, j, k;
 
        spin_lock_irqsave(&s->lock, flags);
        j = rdmixer(s, DSP_MIX_ADCMIXIDX_L);
        spin_unlock_irqrestore(&s->lock, flags);
        for (k = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                if (j & mixtable[i].rec)
                        k |= 1 << i;
        return k;
}
 
static int mixer_ioctl(struct cm_state *s, unsigned int cmd, unsigned long arg)
{
        unsigned long flags;
        int i, val, j;
        unsigned char l, r, rl, rr;
 
        VALIDATE_STATE(s);
        if (cmd == SOUND_MIXER_INFO) {
                mixer_info info;
                strncpy(info.id, "cmpci", sizeof(info.id));
                strncpy(info.name, "C-Media PCI", sizeof(info.name));
                info.modify_counter = s->mix.modcnt;
                if (copy_to_user((void *)arg, &info, sizeof(info)))
                        return -EFAULT;
                return 0;
        }
        if (cmd == SOUND_OLD_MIXER_INFO) {
                _old_mixer_info info;
                strncpy(info.id, "cmpci", sizeof(info.id));
                strncpy(info.name, "C-Media cmpci", sizeof(info.name));
                if (copy_to_user((void *)arg, &info, sizeof(info)))
                        return -EFAULT;
                return 0;
        }
        if (cmd == OSS_GETVERSION)
                return put_user(SOUND_VERSION, (int *)arg);
        if (_IOC_TYPE(cmd) != 'M' || _IOC_SIZE(cmd) != sizeof(int))
                return -EINVAL;
        if (_IOC_DIR(cmd) == _IOC_READ) {
                switch (_IOC_NR(cmd)) {
                case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
                        return put_user(mixer_recmask(s), (int *)arg);
 
                case SOUND_MIXER_OUTSRC: /* Arg contains a bit for each recording source */
                        return put_user(mixer_outmask(s), (int *)arg);
 
                case SOUND_MIXER_DEVMASK: /* Arg contains a bit for each supported device */
                        for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                                if (mixtable[i].type)
                                        val |= 1 << i;
                        return put_user(val, (int *)arg);
 
                case SOUND_MIXER_RECMASK: /* Arg contains a bit for each supported recording source */
                        for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                                if (mixtable[i].rec)
                                        val |= 1 << i;
                        return put_user(val, (int *)arg);
 
                case SOUND_MIXER_OUTMASK: /* Arg contains a bit for each supported recording source */
                        for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                                if (mixtable[i].play)
                                        val |= 1 << i;
                        return put_user(val, (int *)arg);
 
                 case SOUND_MIXER_STEREODEVS: /* Mixer channels supporting stereo */
                        for (val = i = 0; i < SOUND_MIXER_NRDEVICES; i++)
                                if (mixtable[i].type && mixtable[i].type != MT_4MUTEMONO)
                                        val |= 1 << i;
                        return put_user(val, (int *)arg);
 
                case SOUND_MIXER_CAPS:
                        return put_user(0, (int *)arg);
 
                default:
                        i = _IOC_NR(cmd);
                        if (i >= SOUND_MIXER_NRDEVICES || !mixtable[i].type)
                                return -EINVAL;
                        if (!volidx[i])
                                return -EINVAL;
                        return put_user(s->mix.vol[volidx[i]-1], (int *)arg);
                }
        }
        if (_IOC_DIR(cmd) != (_IOC_READ|_IOC_WRITE))
                return -EINVAL;
        s->mix.modcnt++;
        switch (_IOC_NR(cmd)) {
        case SOUND_MIXER_RECSRC: /* Arg contains a bit for each recording source */
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                i = generic_hweight32(val);
                for (j = i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
                        if (!(val & (1 << i)))
                                continue;
                        if (!mixtable[i].rec) {
                                val &= ~(1 << i);
                                continue;
                        }
                        j |= mixtable[i].rec;
                }
                spin_lock_irqsave(&s->lock, flags);
                wrmixer(s, DSP_MIX_ADCMIXIDX_L, j);
                wrmixer(s, DSP_MIX_ADCMIXIDX_R, (j & 1) | (j>>1) | (j & 0x80));
                spin_unlock_irqrestore(&s->lock, flags);
                return 0;
 
        case SOUND_MIXER_OUTSRC: /* Arg contains a bit for each recording source */
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                for (j = i = 0; i < SOUND_MIXER_NRDEVICES; i++) {
                        if (!(val & (1 << i)))
                                continue;
                        if (!mixtable[i].play) {
                                val &= ~(1 << i);
                                continue;
                        }
                        j |= mixtable[i].play;
                }
                spin_lock_irqsave(&s->lock, flags);
                wrmixer(s, DSP_MIX_OUTMIXIDX, j);
                spin_unlock_irqrestore(&s->lock, flags);
                return 0;
 
        default:
                i = _IOC_NR(cmd);
                if (i >= SOUND_MIXER_NRDEVICES || !mixtable[i].type)
                        return -EINVAL;
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                l = val & 0xff;
                r = (val >> 8) & 0xff;
                if (l > 100)
                        l = 100;
                if (r > 100)
                        r = 100;
                spin_lock_irqsave(&s->lock, flags);
                switch (mixtable[i].type) {
                case MT_4:
                        if (l >= 10)
                                l -= 10;
                        if (r >= 10)
                                r -= 10;
                        frobindir(s, mixtable[i].left, 0xf0, l / 6);
                        frobindir(s, mixtable[i].right, 0xf0, l / 6);
                        break;
 
                case MT_4MUTEMONO:
                        rl = (l < 4 ? 0 : (l - 5) / 3) & 31;
                        rr = (rl >> 2) & 7;
                        wrmixer(s, mixtable[i].left, rl<<3);
                        if (i == SOUND_MIXER_MIC)
                                maskb(s->iobase + CODEC_CMI_MIXER2, ~0x0e, rr<<1);
                        break;
 
                case MT_5MUTEMONO:
                        r = l;
                        rl = l < 4 ? 0 : (l - 5) / 3;
                        wrmixer(s, mixtable[i].left, rl<<3);
                        l = rdmixer(s, DSP_MIX_OUTMIXIDX) & ~mixtable[i].play;
                        rr = rl ? mixtable[i].play : 0;
                        wrmixer(s, DSP_MIX_OUTMIXIDX, l | rr);
                        /* for recording */
                        if (i == SOUND_MIXER_MIC) {
                                if (s->chip_version >= 39) {
                                        rr = rl >> 1;
                                        maskb(s->iobase + CODEC_CMI_MIXER2, ~0x0e, rr&0x07);
                                        frobindir(s, DSP_MIX_EXTENSION, 0x01, rr>>3);
                                } else {
                                        rr = rl >> 2;
                                        maskb(s->iobase + CODEC_CMI_MIXER2, ~0x0e, rr<<1);
                                }
                        }
                        break;
 
                case MT_5MUTE:
                        rl = l < 4 ? 0 : (l - 5) / 3;
                        rr = r < 4 ? 0 : (r - 5) / 3;
                        wrmixer(s, mixtable[i].left, rl<<3);
                        wrmixer(s, mixtable[i].right, rr<<3);
                        l = rdmixer(s, DSP_MIX_OUTMIXIDX);
                        l &= ~mixtable[i].play;
                        r = (rl|rr) ? mixtable[i].play : 0;
                        wrmixer(s, DSP_MIX_OUTMIXIDX, l | r);
                        break;
 
                case MT_6MUTE:
                        if (l < 6)
                                rl = 0x00;
                        else
                                rl = l * 2 / 3;
                        if (r < 6)
                                rr = 0x00;
                        else
                                rr = r * 2 / 3;
                        wrmixer(s, mixtable[i].left, rl);
                        wrmixer(s, mixtable[i].right, rr);
                        break;
                }
                spin_unlock_irqrestore(&s->lock, flags);
 
                if (!volidx[i])
                        return -EINVAL;
                s->mix.vol[volidx[i]-1] = val;
                return put_user(s->mix.vol[volidx[i]-1], (int *)arg);
        }
}
 
/* --------------------------------------------------------------------- */
 
static int cm_open_mixdev(struct inode *inode, struct file *file)
{
        int minor = MINOR(inode->i_rdev);
        struct list_head *list;
        struct cm_state *s;
 
        for (list = devs.next; ; list = list->next) {
                if (list == &devs)
                        return -ENODEV;
                s = list_entry(list, struct cm_state, devs);
                if (s->dev_mixer == minor)
                        break;
        }
        VALIDATE_STATE(s);
        file->private_data = s;
        return 0;
}
 
static int cm_release_mixdev(struct inode *inode, struct file *file)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
 
        VALIDATE_STATE(s);
        return 0;
}
 
static int cm_ioctl_mixdev(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
        return mixer_ioctl((struct cm_state *)file->private_data, cmd, arg);
}
 
static /*const*/ struct file_operations cm_mixer_fops = {
        owner:          THIS_MODULE,
        llseek:         no_llseek,
        ioctl:          cm_ioctl_mixdev,
        open:           cm_open_mixdev,
        release:        cm_release_mixdev,
};
 
 
/* --------------------------------------------------------------------- */
 
static int drain_dac(struct cm_state *s, int nonblock)
{
        DECLARE_WAITQUEUE(wait, current);
        unsigned long flags;
        int count, tmo;
 
        if (s->dma_dac.mapped || !s->dma_dac.ready)
                return 0;
        add_wait_queue(&s->dma_dac.wait, &wait);
        for (;;) {
                __set_current_state(TASK_INTERRUPTIBLE);
                spin_lock_irqsave(&s->lock, flags);
                count = s->dma_dac.count;
                spin_unlock_irqrestore(&s->lock, flags);
                if (count <= 0)
                        break;
                if (signal_pending(current))
                        break;
                if (nonblock) {
                        remove_wait_queue(&s->dma_dac.wait, &wait);
                        set_current_state(TASK_RUNNING);
                        return -EBUSY;
                }
                tmo = 3 * HZ * (count + s->dma_dac.fragsize) / 2 / s->ratedac;
                tmo >>= sample_shift[(s->fmt >> CM_CFMT_DACSHIFT) & CM_CFMT_MASK];
                if (!schedule_timeout(tmo + 1))
                        printk(KERN_DEBUG "cmpci: dma timed out??\n");
        }
        remove_wait_queue(&s->dma_dac.wait, &wait);
        set_current_state(TASK_RUNNING);
        if (signal_pending(current))
                return -ERESTARTSYS;
        return 0;
}
 
/* --------------------------------------------------------------------- */
 
static ssize_t cm_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        DECLARE_WAITQUEUE(wait, current);
        ssize_t ret;
        unsigned long flags;
        unsigned swptr;
        int cnt;
 
        VALIDATE_STATE(s);
        if (ppos != &file->f_pos)
                return -ESPIPE;
        if (s->dma_adc.mapped)
                return -ENXIO;
        if (!s->dma_adc.ready && (ret = prog_dmabuf(s, 1)))
                return ret;
        if (!access_ok(VERIFY_WRITE, buffer, count))
                return -EFAULT;
        ret = 0;
 
        add_wait_queue(&s->dma_adc.wait, &wait);
        while (count > 0) {
                spin_lock_irqsave(&s->lock, flags);
                swptr = s->dma_adc.swptr;
                cnt = s->dma_adc.dmasize-swptr;
                if (s->dma_adc.count < cnt)
                        cnt = s->dma_adc.count;
                if (cnt <= 0)
                        __set_current_state(TASK_INTERRUPTIBLE);
                spin_unlock_irqrestore(&s->lock, flags);
                if (cnt > count)
                        cnt = count;
                if (cnt <= 0) {
                        start_adc(s);
                        if (file->f_flags & O_NONBLOCK) {
                                if (!ret)
                                        ret = -EAGAIN;
                                goto out;
                        }
                        if (!schedule_timeout(HZ)) {
                                printk(KERN_DEBUG "cmpci: read: chip lockup? dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
                                       s->dma_adc.dmasize, s->dma_adc.fragsize, s->dma_adc.count,
                                       s->dma_adc.hwptr, s->dma_adc.swptr);
                                spin_lock_irqsave(&s->lock, flags);
                                stop_adc_unlocked(s);
                                set_dmaadc(s, s->dma_adc.rawphys, s->dma_adc.dmasamples);
                                /* program sample counts */
                                set_countadc(s, s->dma_adc.fragsamples);
                                s->dma_adc.count = s->dma_adc.hwptr = s->dma_adc.swptr = 0;
                                spin_unlock_irqrestore(&s->lock, flags);
                        }
                        if (signal_pending(current)) {
                                if (!ret)
                                        ret = -ERESTARTSYS;
                                goto out;
                        }
                        continue;
                }
                if (copy_to_user(buffer, s->dma_adc.rawbuf + swptr, cnt)) {
                        if (!ret)
                                ret = -EFAULT;
                        goto out;
                }
                swptr = (swptr + cnt) % s->dma_adc.dmasize;
                spin_lock_irqsave(&s->lock, flags);
                s->dma_adc.swptr = swptr;
                s->dma_adc.count -= cnt;
                count -= cnt;
                buffer += cnt;
                ret += cnt;
                start_adc_unlocked(s);
                spin_unlock_irqrestore(&s->lock, flags);
        }
out:
        remove_wait_queue(&s->dma_adc.wait, &wait);
        set_current_state(TASK_RUNNING);
        return ret;
}
 
static ssize_t cm_write(struct file *file, const char *buffer, size_t count, loff_t *ppos)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        DECLARE_WAITQUEUE(wait, current);
        ssize_t ret;
        unsigned long flags;
        unsigned swptr;
        int cnt;
 
        VALIDATE_STATE(s);
        if (ppos != &file->f_pos)
                return -ESPIPE;
        if (s->dma_dac.mapped)
                return -ENXIO;
        if (!s->dma_dac.ready && (ret = prog_dmabuf(s, 0)))
                return ret;
        if (!access_ok(VERIFY_READ, buffer, count))
                return -EFAULT;
        if (s->status & DO_DUAL_DAC) {
                if (s->dma_adc.mapped)
                        return -ENXIO;
                if (!s->dma_adc.ready && (ret = prog_dmabuf(s, 1)))
                        return ret;
        }
        if (!access_ok(VERIFY_READ, buffer, count))
                return -EFAULT;
        ret = 0;
 
        add_wait_queue(&s->dma_dac.wait, &wait);
        while (count > 0) {
                spin_lock_irqsave(&s->lock, flags);
                if (s->dma_dac.count < 0) {
                        s->dma_dac.count = 0;
                        s->dma_dac.swptr = s->dma_dac.hwptr;
                }
                if (s->status & DO_DUAL_DAC) {
                        s->dma_adc.swptr = s->dma_dac.swptr;
                        s->dma_adc.count = s->dma_dac.count;
                        s->dma_adc.endcleared = s->dma_dac.endcleared;
                }
                swptr = s->dma_dac.swptr;
                cnt = s->dma_dac.dmasize-swptr;
                if (s->status & DO_AC3_SW) {
                        if (s->dma_dac.count + 2 * cnt > s->dma_dac.dmasize)
                                cnt = (s->dma_dac.dmasize - s->dma_dac.count) / 2;
                } else {
                        if (s->dma_dac.count + cnt > s->dma_dac.dmasize)
                                cnt = s->dma_dac.dmasize - s->dma_dac.count;
                }
                if (cnt <= 0)
                        __set_current_state(TASK_INTERRUPTIBLE);
                spin_unlock_irqrestore(&s->lock, flags);
                if (cnt > count)
                        cnt = count;
                if ((s->status & DO_DUAL_DAC) && (cnt > count / 2))
                    cnt = count / 2;
                if (cnt <= 0) {
                        start_dac(s);
                        if (file->f_flags & O_NONBLOCK) {
                                if (!ret)
                                        ret = -EAGAIN;
                                goto out;
                        }
                        if (!schedule_timeout(HZ)) {
                                printk(KERN_DEBUG "cmpci: write: chip lockup? dmasz %u fragsz %u count %i hwptr %u swptr %u\n",
                                       s->dma_dac.dmasize, s->dma_dac.fragsize, s->dma_dac.count,
                                       s->dma_dac.hwptr, s->dma_dac.swptr);
                                spin_lock_irqsave(&s->lock, flags);
                                stop_dac_unlocked(s);
                                set_dmadac(s, s->dma_dac.rawphys, s->dma_dac.dmasamples);
                                /* program sample counts */
                                set_countdac(s, s->dma_dac.fragsamples);
                                s->dma_dac.count = s->dma_dac.hwptr = s->dma_dac.swptr = 0;
                                if (s->status & DO_DUAL_DAC)  {
                                        set_dmadac1(s, s->dma_adc.rawphys, s->dma_adc.dmasamples);
                                        s->dma_adc.count = s->dma_adc.hwptr = s->dma_adc.swptr = 0;
                                }
                                spin_unlock_irqrestore(&s->lock, flags);
                        }
                        if (signal_pending(current)) {
                                if (!ret)
                                        ret = -ERESTARTSYS;
                                goto out;
                        }
                        continue;
                }
                if (s->status & DO_AC3_SW) {
                        // clip exceeded data, caught by 033 and 037
                        if (swptr + 2 * cnt > s->dma_dac.dmasize)
                                cnt = (s->dma_dac.dmasize - swptr) / 2;
                        if ((ret = trans_ac3(s, s->dma_dac.rawbuf + swptr, buffer, cnt)))
                                goto out;
                        swptr = (swptr + 2 * cnt) % s->dma_dac.dmasize;
                } else if (s->status & DO_DUAL_DAC) {
                        int     i;
                        unsigned long *src, *dst0, *dst1;
 
                        src = (unsigned long *) buffer;
                        dst0 = (unsigned long *) (s->dma_dac.rawbuf + swptr);
                        dst1 = (unsigned long *) (s->dma_adc.rawbuf + swptr);
                        // copy left/right sample at one time
                        for (i = 0; i <= cnt / 4; i++) {
                                if ((ret = __get_user(*dst0++, src++)))
                                        goto out;
                                if ((ret = __get_user(*dst1++, src++)))
                                        goto out;
                        }
                        swptr = (swptr + cnt) % s->dma_dac.dmasize;
                } else {
                        if (copy_from_user(s->dma_dac.rawbuf + swptr, buffer, cnt)) {
                                if (!ret)
                                        ret = -EFAULT;
                                goto out;
                        }
                        swptr = (swptr + cnt) % s->dma_dac.dmasize;
                }
                spin_lock_irqsave(&s->lock, flags);
                s->dma_dac.swptr = swptr;
                s->dma_dac.count += cnt;
                if (s->status & DO_AC3_SW)
                        s->dma_dac.count += cnt;
                s->dma_dac.endcleared = 0;
                spin_unlock_irqrestore(&s->lock, flags);
                count -= cnt;
                buffer += cnt;
                ret += cnt;
                if (s->status & DO_DUAL_DAC) {
                        count -= cnt;
                        buffer += cnt;
                        ret += cnt;
                }
                start_dac(s);
        }
out:
        remove_wait_queue(&s->dma_dac.wait, &wait);
        set_current_state(TASK_RUNNING);
        return ret;
}
 
static unsigned int cm_poll(struct file *file, struct poll_table_struct *wait)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        unsigned long flags;
        unsigned int mask = 0;
 
        VALIDATE_STATE(s);
        if (file->f_mode & FMODE_WRITE)
                poll_wait(file, &s->dma_dac.wait, wait);
        if (file->f_mode & FMODE_READ)
                poll_wait(file, &s->dma_adc.wait, wait);
        spin_lock_irqsave(&s->lock, flags);
        cm_update_ptr(s);
        if (file->f_mode & FMODE_READ) {
                if (s->dma_adc.count >= (signed)s->dma_adc.fragsize)
                        mask |= POLLIN | POLLRDNORM;
        }
        if (file->f_mode & FMODE_WRITE) {
                if (s->dma_dac.mapped) {
                        if (s->dma_dac.count >= (signed)s->dma_dac.fragsize)
                                mask |= POLLOUT | POLLWRNORM;
                } else {
                        if ((signed)s->dma_dac.dmasize >= s->dma_dac.count + (signed)s->dma_dac.fragsize)
                                mask |= POLLOUT | POLLWRNORM;
                }
        }
        spin_unlock_irqrestore(&s->lock, flags);
        return mask;
}
 
static int cm_mmap(struct file *file, struct vm_area_struct *vma)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        struct dmabuf *db;
        int ret = -EINVAL;
        unsigned long size;
 
        VALIDATE_STATE(s);
        lock_kernel();
        if (vma->vm_flags & VM_WRITE) {
                if ((ret = prog_dmabuf(s, 0)) != 0)
                        goto out;
                db = &s->dma_dac;
        } else if (vma->vm_flags & VM_READ) {
                if ((ret = prog_dmabuf(s, 1)) != 0)
                        goto out;
                db = &s->dma_adc;
        } else
                goto out;
        ret = -EINVAL;
        if (vma->vm_pgoff != 0)
                goto out;
        size = vma->vm_end - vma->vm_start;
        if (size > (PAGE_SIZE << db->buforder))
                goto out;
        ret = -EINVAL;
        if (remap_page_range(vma->vm_start, virt_to_phys(db->rawbuf), size, vma->vm_page_prot))
                goto out;
        db->mapped = 1;
        ret = 0;
out:
        unlock_kernel();
        return ret;
}
 
#define SNDCTL_SPDIF_COPYRIGHT  _SIOW('S',  0, int)       // set/reset S/PDIF copy protection
#define SNDCTL_SPDIF_LOOP       _SIOW('S',  1, int)       // set/reset S/PDIF loop
#define SNDCTL_SPDIF_MONITOR    _SIOW('S',  2, int)       // set S/PDIF monitor
#define SNDCTL_SPDIF_LEVEL      _SIOW('S',  3, int)       // set/reset S/PDIF out level
#define SNDCTL_SPDIF_INV        _SIOW('S',  4, int)       // set/reset S/PDIF in inverse
#define SNDCTL_SPDIF_SEL2       _SIOW('S',  5, int)       // set S/PDIF in #2
#define SNDCTL_SPDIF_VALID      _SIOW('S',  6, int)       // set S/PDIF valid
#define SNDCTL_SPDIFOUT         _SIOW('S',  7, int)       // set S/PDIF out
#define SNDCTL_SPDIFIN          _SIOW('S',  8, int)       // set S/PDIF out
 
static int cm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        unsigned long flags;
        audio_buf_info abinfo;
        count_info cinfo;
        int val, mapped, ret;
        unsigned char fmtm, fmtd;
 
        VALIDATE_STATE(s);
        mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
                ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
        switch (cmd) {
        case OSS_GETVERSION:
                return put_user(SOUND_VERSION, (int *)arg);
 
        case SNDCTL_DSP_SYNC:
                if (file->f_mode & FMODE_WRITE)
                        return drain_dac(s, 0/*file->f_flags & O_NONBLOCK*/);
                return 0;
 
        case SNDCTL_DSP_SETDUPLEX:
                return 0;
 
        case SNDCTL_DSP_GETCAPS:
                return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME | DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_BIND, (int *)arg);
 
        case SNDCTL_DSP_RESET:
                if (file->f_mode & FMODE_WRITE) {
                        stop_dac(s);
                        synchronize_irq();
                        s->dma_dac.swptr = s->dma_dac.hwptr = s->dma_dac.count = s->dma_dac.total_bytes = 0;
                        if (s->status & DO_DUAL_DAC)
                                s->dma_adc.swptr = s->dma_adc.hwptr = s->dma_adc.count = s->dma_adc.total_bytes = 0;
                }
                if (file->f_mode & FMODE_READ) {
                        stop_adc(s);
                        synchronize_irq();
                        s->dma_adc.swptr = s->dma_adc.hwptr = s->dma_adc.count = s->dma_adc.total_bytes = 0;
                }
                return 0;
 
        case SNDCTL_DSP_SPEED:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                if (val >= 0) {
                        if (file->f_mode & FMODE_READ) {
                                spin_lock_irqsave(&s->lock, flags);
                                stop_adc_unlocked(s);
                                s->dma_adc.ready = 0;
                                set_adc_rate_unlocked(s, val);
                                spin_unlock_irqrestore(&s->lock, flags);
                        }
                        if (file->f_mode & FMODE_WRITE) {
                                stop_dac(s);
                                s->dma_dac.ready = 0;
                                if (s->status & DO_DUAL_DAC)
                                        s->dma_adc.ready = 0;
                                set_dac_rate(s, val);
                        }
                }
                return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, (int *)arg);
 
        case SNDCTL_DSP_STEREO:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                fmtd = 0;
                fmtm = ~0;
                if (file->f_mode & FMODE_READ) {
                        stop_adc(s);
                        s->dma_adc.ready = 0;
                        if (val)
                                fmtd |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
                        else
                                fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_ADCSHIFT);
                }
                if (file->f_mode & FMODE_WRITE) {
                        stop_dac(s);
                        s->dma_dac.ready = 0;
                        if (val)
                                fmtd |= CM_CFMT_STEREO << CM_CFMT_DACSHIFT;
                        else
                                fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_DACSHIFT);
                        if (s->status & DO_DUAL_DAC) {
                                s->dma_adc.ready = 0;
                                if (val)
                                        fmtd |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
                                else
                                        fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_ADCSHIFT);
                        }
                }
                set_fmt(s, fmtm, fmtd);
                return 0;
 
        case SNDCTL_DSP_CHANNELS:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                if (val != 0) {
                        fmtd = 0;
                        fmtm = ~0;
                        if (file->f_mode & FMODE_READ) {
                                stop_adc(s);
                                s->dma_adc.ready = 0;
                                if (val >= 2)
                                        fmtd |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
                                else
                                        fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_ADCSHIFT);
                        }
                        if (file->f_mode & FMODE_WRITE) {
                                stop_dac(s);
                                s->dma_dac.ready = 0;
                                if (val >= 2)
                                        fmtd |= CM_CFMT_STEREO << CM_CFMT_DACSHIFT;
                                else
                                        fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_DACSHIFT);
                                if (s->status & DO_DUAL_DAC) {
                                        s->dma_adc.ready = 0;
                                        if (val >= 2)
                                                fmtd |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
                                        else
                                                fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_ADCSHIFT);
                                }
                        }
                        set_fmt(s, fmtm, fmtd);
                        if ((s->capability & CAN_MULTI_CH)
                             && (file->f_mode & FMODE_WRITE)) {
                                val = set_dac_channels(s, val);
                                return put_user(val, (int *)arg);
                        }
                }
                return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_STEREO << CM_CFMT_ADCSHIFT)
                                           : (CM_CFMT_STEREO << CM_CFMT_DACSHIFT))) ? 2 : 1, (int *)arg);
 
        case SNDCTL_DSP_GETFMTS: /* Returns a mask */
                return put_user(AFMT_S16_LE|AFMT_U8|AFMT_AC3, (int *)arg);
 
        case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                if (val != AFMT_QUERY) {
                        fmtd = 0;
                        fmtm = ~0;
                        if (file->f_mode & FMODE_READ) {
                                stop_adc(s);
                                s->dma_adc.ready = 0;
                                if (val == AFMT_S16_LE)
                                        fmtd |= CM_CFMT_16BIT << CM_CFMT_ADCSHIFT;
                                else
                                        fmtm &= ~(CM_CFMT_16BIT << CM_CFMT_ADCSHIFT);
                        }
                        if (file->f_mode & FMODE_WRITE) {
                                stop_dac(s);
                                s->dma_dac.ready = 0;
                                if (val == AFMT_S16_LE || val == AFMT_AC3)
                                        fmtd |= CM_CFMT_16BIT << CM_CFMT_DACSHIFT;
                                else
                                        fmtm &= ~(CM_CFMT_16BIT << CM_CFMT_DACSHIFT);
                                if (val == AFMT_AC3) {
                                        fmtd |= CM_CFMT_STEREO << CM_CFMT_DACSHIFT;
                                        set_ac3(s, s->ratedac);
                                } else
                                        set_ac3(s, 0);
                                if (s->status & DO_DUAL_DAC) {
                                        s->dma_adc.ready = 0;
                                        if (val == AFMT_S16_LE)
                                                fmtd |= CM_CFMT_STEREO << CM_CFMT_ADCSHIFT;
                                        else
                                                fmtm &= ~(CM_CFMT_STEREO << CM_CFMT_ADCSHIFT);
                                }
                        }
                        set_fmt(s, fmtm, fmtd);
                }
                if (s->status & DO_AC3) return put_user(AFMT_AC3, (int *)arg);
                return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_16BIT << CM_CFMT_ADCSHIFT)
                                           : (CM_CFMT_16BIT << CM_CFMT_DACSHIFT))) ? AFMT_S16_LE : AFMT_U8, (int *)arg);
 
        case SNDCTL_DSP_POST:
                return 0;
 
        case SNDCTL_DSP_GETTRIGGER:
                val = 0;
                if (s->status & DO_DUAL_DAC) {
                        if (file->f_mode & FMODE_WRITE &&
                         (s->enable & ENDAC) &&
                         (s->enable & ENADC))
                                val |= PCM_ENABLE_OUTPUT;
                        return put_user(val, (int *)arg);
                }
                if (file->f_mode & FMODE_READ && s->enable & ENADC)
                        val |= PCM_ENABLE_INPUT;
                if (file->f_mode & FMODE_WRITE && s->enable & ENDAC)
                        val |= PCM_ENABLE_OUTPUT;
                return put_user(val, (int *)arg);
 
        case SNDCTL_DSP_SETTRIGGER:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                if (file->f_mode & FMODE_READ) {
                        if (val & PCM_ENABLE_INPUT) {
                                if (!s->dma_adc.ready && (ret =  prog_dmabuf(s, 1)))
                                        return ret;
                                start_adc(s);
                        } else
                                stop_adc(s);
                }
                if (file->f_mode & FMODE_WRITE) {
                        if (val & PCM_ENABLE_OUTPUT) {
                                if (!s->dma_dac.ready && (ret = prog_dmabuf(s, 0)))
                                        return ret;
                                if (s->status & DO_DUAL_DAC) {
                                        if (!s->dma_adc.ready && (ret = prog_dmabuf(s, 1)))
                                                return ret;
                                }
                                start_dac(s);
                        } else
                                stop_dac(s);
                }
                return 0;
 
        case SNDCTL_DSP_GETOSPACE:
                if (!(file->f_mode & FMODE_WRITE))
                        return -EINVAL;
                if (!(s->enable & ENDAC) && (val = prog_dmabuf(s, 0)) != 0)
                        return val;
                spin_lock_irqsave(&s->lock, flags);
                cm_update_ptr(s);
                abinfo.fragsize = s->dma_dac.fragsize;
                abinfo.bytes = s->dma_dac.dmasize - s->dma_dac.count;
                abinfo.fragstotal = s->dma_dac.numfrag;
                abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
                spin_unlock_irqrestore(&s->lock, flags);
                return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
 
        case SNDCTL_DSP_GETISPACE:
                if (!(file->f_mode & FMODE_READ))
                        return -EINVAL;
                if (!(s->enable & ENADC) && (val = prog_dmabuf(s, 1)) != 0)
                        return val;
                spin_lock_irqsave(&s->lock, flags);
                cm_update_ptr(s);
                abinfo.fragsize = s->dma_adc.fragsize;
                abinfo.bytes = s->dma_adc.count;
                abinfo.fragstotal = s->dma_adc.numfrag;
                abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
                spin_unlock_irqrestore(&s->lock, flags);
                return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
 
        case SNDCTL_DSP_NONBLOCK:
                file->f_flags |= O_NONBLOCK;
                return 0;
 
        case SNDCTL_DSP_GETODELAY:
                if (!(file->f_mode & FMODE_WRITE))
                        return -EINVAL;
                spin_lock_irqsave(&s->lock, flags);
                cm_update_ptr(s);
                val = s->dma_dac.count;
                spin_unlock_irqrestore(&s->lock, flags);
                return put_user(val, (int *)arg);
 
        case SNDCTL_DSP_GETIPTR:
                if (!(file->f_mode & FMODE_READ))
                        return -EINVAL;
                spin_lock_irqsave(&s->lock, flags);
                cm_update_ptr(s);
                cinfo.bytes = s->dma_adc.total_bytes;
                cinfo.blocks = s->dma_adc.count >> s->dma_adc.fragshift;
                cinfo.ptr = s->dma_adc.hwptr;
                if (s->dma_adc.mapped)
                        s->dma_adc.count &= s->dma_adc.fragsize-1;
                spin_unlock_irqrestore(&s->lock, flags);
                return copy_to_user((void *)arg, &cinfo, sizeof(cinfo))  ? -EFAULT : 0;
 
        case SNDCTL_DSP_GETOPTR:
                if (!(file->f_mode & FMODE_WRITE))
                        return -EINVAL;
                spin_lock_irqsave(&s->lock, flags);
                cm_update_ptr(s);
                cinfo.bytes = s->dma_dac.total_bytes;
                cinfo.blocks = s->dma_dac.count >> s->dma_dac.fragshift;
                cinfo.ptr = s->dma_dac.hwptr;
                if (s->dma_dac.mapped)
                        s->dma_dac.count &= s->dma_dac.fragsize-1;
                if (s->status & DO_DUAL_DAC) {
                        if (s->dma_adc.mapped)
                                s->dma_adc.count &= s->dma_adc.fragsize-1;
                }
                spin_unlock_irqrestore(&s->lock, flags);
                return copy_to_user((void *)arg, &cinfo, sizeof(cinfo)) ? -EFAULT : 0;
 
        case SNDCTL_DSP_GETBLKSIZE:
                if (file->f_mode & FMODE_WRITE) {
                        if ((val = prog_dmabuf(s, 0)))
                                return val;
                        if (s->status & DO_DUAL_DAC) {
                                if ((val = prog_dmabuf(s, 1)))
                                        return val;
                                return put_user(2 * s->dma_dac.fragsize, (int *)arg);
                        }
                        return put_user(s->dma_dac.fragsize, (int *)arg);
                }
                if ((val = prog_dmabuf(s, 1)))
                        return val;
                return put_user(s->dma_adc.fragsize, (int *)arg);
 
        case SNDCTL_DSP_SETFRAGMENT:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                if (file->f_mode & FMODE_READ) {
                        s->dma_adc.ossfragshift = val & 0xffff;
                        s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
                        if (s->dma_adc.ossfragshift < 4)
                                s->dma_adc.ossfragshift = 4;
                        if (s->dma_adc.ossfragshift > 15)
                                s->dma_adc.ossfragshift = 15;
                        if (s->dma_adc.ossmaxfrags < 4)
                                s->dma_adc.ossmaxfrags = 4;
                }
                if (file->f_mode & FMODE_WRITE) {
                        s->dma_dac.ossfragshift = val & 0xffff;
                        s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
                        if (s->dma_dac.ossfragshift < 4)
                                s->dma_dac.ossfragshift = 4;
                        if (s->dma_dac.ossfragshift > 15)
                                s->dma_dac.ossfragshift = 15;
                        if (s->dma_dac.ossmaxfrags < 4)
                                s->dma_dac.ossmaxfrags = 4;
                        if (s->status & DO_DUAL_DAC) {
                                s->dma_adc.ossfragshift = s->dma_dac.ossfragshift;
                                s->dma_adc.ossmaxfrags = s->dma_dac.ossmaxfrags;
                        }
                }
                return 0;
 
        case SNDCTL_DSP_SUBDIVIDE:
                if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
                    (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
                        return -EINVAL;
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                if (val != 1 && val != 2 && val != 4)
                        return -EINVAL;
                if (file->f_mode & FMODE_READ)
                        s->dma_adc.subdivision = val;
                if (file->f_mode & FMODE_WRITE) {
                        s->dma_dac.subdivision = val;
                        if (s->status & DO_DUAL_DAC)
                                s->dma_adc.subdivision = val;
                }
                return 0;
 
        case SOUND_PCM_READ_RATE:
                return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, (int *)arg);
 
        case SOUND_PCM_READ_CHANNELS:
                return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_STEREO << CM_CFMT_ADCSHIFT) : (CM_CFMT_STEREO << CM_CFMT_DACSHIFT))) ? 2 : 1, (int *)arg);
 
        case SOUND_PCM_READ_BITS:
                return put_user((s->fmt & ((file->f_mode & FMODE_READ) ? (CM_CFMT_16BIT << CM_CFMT_ADCSHIFT) : (CM_CFMT_16BIT << CM_CFMT_DACSHIFT))) ? 16 : 8, (int *)arg);
 
        case SOUND_PCM_READ_FILTER:
                return put_user((file->f_mode & FMODE_READ) ? s->rateadc : s->ratedac, (int *)arg);
 
        case SNDCTL_DSP_GETCHANNELMASK:
                return put_user(DSP_BIND_FRONT|DSP_BIND_SURR|DSP_BIND_CENTER_LFE|DSP_BIND_SPDIF, (int *)arg);
 
        case SNDCTL_DSP_BIND_CHANNEL:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                if (val == DSP_BIND_QUERY) {
                        val = DSP_BIND_FRONT;
                        if (s->status & DO_SPDIF_OUT)
                                val |= DSP_BIND_SPDIF;
                        else {
                                if (s->curr_channels == 4)
                                        val |= DSP_BIND_SURR;
                                if (s->curr_channels > 4)
                                        val |= DSP_BIND_CENTER_LFE;
                        }
                } else {
                        if (file->f_mode & FMODE_READ) {
                                stop_adc(s);
                                s->dma_adc.ready = 0;
                                if (val & DSP_BIND_SPDIF) {
                                        set_spdifin(s, s->rateadc);
                                        if (!(s->status & DO_SPDIF_OUT))
                                                val &= ~DSP_BIND_SPDIF;
                                }
                        }
                        if (file->f_mode & FMODE_WRITE) {
                                stop_dac(s);
                                s->dma_dac.ready = 0;
                                if (val & DSP_BIND_SPDIF) {
                                        set_spdifout(s, s->ratedac);
                                        set_dac_channels(s, s->fmt & (CM_CFMT_STEREO << CM_CFMT_DACSHIFT) ? 2 : 1);
                                        if (!(s->status & DO_SPDIF_OUT))
                                                val &= ~DSP_BIND_SPDIF;
                                } else {
                                        int channels;
                                        int mask;
 
                                        mask = val & (DSP_BIND_FRONT|DSP_BIND_SURR|DSP_BIND_CENTER_LFE);
                                        switch (mask) {
                                            case DSP_BIND_FRONT:
                                                channels = 2;
                                                break;
                                            case DSP_BIND_FRONT|DSP_BIND_SURR:
                                                channels = 4;
                                                break;
                                            case DSP_BIND_FRONT|DSP_BIND_SURR|DSP_BIND_CENTER_LFE:
                                                channels = 6;
                                                break;
                                            default:
                                                channels = s->fmt & (CM_CFMT_STEREO << CM_CFMT_DACSHIFT) ? 2 : 1;
                                                break;
                                        }
                                        set_dac_channels(s, channels);
                                }
                        }
                }
                return put_user(val, (int *)arg);
 
        case SOUND_PCM_WRITE_FILTER:
        case SNDCTL_DSP_MAPINBUF:
        case SNDCTL_DSP_MAPOUTBUF:
        case SNDCTL_DSP_SETSYNCRO:
                return -EINVAL;
        case SNDCTL_SPDIF_COPYRIGHT:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdif_copyright(s, val);
                return 0;
        case SNDCTL_SPDIF_LOOP:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdif_loop(s, val);
                return 0;
        case SNDCTL_SPDIF_MONITOR:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdif_monitor(s, val);
                return 0;
        case SNDCTL_SPDIF_LEVEL:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdifout_level(s, val);
                return 0;
        case SNDCTL_SPDIF_INV:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdifin_inverse(s, val);
                return 0;
        case SNDCTL_SPDIF_SEL2:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdifin_channel2(s, val);
                return 0;
        case SNDCTL_SPDIF_VALID:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdifin_valid(s, val);
                return 0;
        case SNDCTL_SPDIFOUT:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdifout(s, val ? s->ratedac : 0);
                return 0;
        case SNDCTL_SPDIFIN:
                if (get_user(val, (int *)arg))
                        return -EFAULT;
                set_spdifin(s, val ? s->rateadc : 0);
                return 0;
        }
        return mixer_ioctl(s, cmd, arg);
}
 
static int cm_open(struct inode *inode, struct file *file)
{
        int minor = MINOR(inode->i_rdev);
        DECLARE_WAITQUEUE(wait, current);
        unsigned char fmtm = ~0, fmts = 0;
        struct list_head *list;
        struct cm_state *s;
 
        for (list = devs.next; ; list = list->next) {
                if (list == &devs)
                        return -ENODEV;
                s = list_entry(list, struct cm_state, devs);
                if (!((s->dev_audio ^ minor) & ~0xf))
                        break;
        }
        VALIDATE_STATE(s);
        file->private_data = s;
        /* wait for device to become free */
        down(&s->open_sem);
        while (s->open_mode & file->f_mode) {
                if (file->f_flags & O_NONBLOCK) {
                        up(&s->open_sem);
                        return -EBUSY;
                }
                add_wait_queue(&s->open_wait, &wait);
                __set_current_state(TASK_INTERRUPTIBLE);
                up(&s->open_sem);
                schedule();
                remove_wait_queue(&s->open_wait, &wait);
                set_current_state(TASK_RUNNING);
                if (signal_pending(current))
                        return -ERESTARTSYS;
                down(&s->open_sem);
        }
        if (file->f_mode & FMODE_READ) {
                fmtm &= ~((CM_CFMT_STEREO | CM_CFMT_16BIT) << CM_CFMT_ADCSHIFT);
                if ((minor & 0xf) == SND_DEV_DSP16)
                        fmts |= CM_CFMT_16BIT << CM_CFMT_ADCSHIFT;
                s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags = s->dma_adc.subdivision = 0;
                set_adc_rate(s, 8000);
                // spdif-in is turnned off by default
                set_spdifin(s, 0);
        }
        if (file->f_mode & FMODE_WRITE) {
                fmtm &= ~((CM_CFMT_STEREO | CM_CFMT_16BIT) << CM_CFMT_DACSHIFT);
                if ((minor & 0xf) == SND_DEV_DSP16)
                        fmts |= CM_CFMT_16BIT << CM_CFMT_DACSHIFT;
                s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags = s->dma_dac.subdivision = 0;
                set_dac_rate(s, 8000);
                // clear previous multichannel, spdif, ac3 state
                set_spdifout(s, 0);
                if (s->deviceid == PCI_DEVICE_ID_CMEDIA_CM8738) {
                        set_ac3(s, 0);
                        set_dac_channels(s, 1);
                }
        }
        set_fmt(s, fmtm, fmts);
        s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
        up(&s->open_sem);
        return 0;
}
 
static int cm_release(struct inode *inode, struct file *file)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
 
        VALIDATE_STATE(s);
        lock_kernel();
        if (file->f_mode & FMODE_WRITE)
                drain_dac(s, file->f_flags & O_NONBLOCK);
        down(&s->open_sem);
        if (file->f_mode & FMODE_WRITE) {
                stop_dac(s);
 
                dealloc_dmabuf(&s->dma_dac);
                if (s->status & DO_DUAL_DAC)
                        dealloc_dmabuf(&s->dma_adc);
 
                if (s->status & DO_MULTI_CH)
                        set_dac_channels(s, 0);
                if (s->status & DO_AC3)
                        set_ac3(s, 0);
                if (s->status & DO_SPDIF_OUT)
                        set_spdifout(s, 0);
        }
        if (file->f_mode & FMODE_READ) {
                stop_adc(s);
                dealloc_dmabuf(&s->dma_adc);
        }
        s->open_mode &= ~(file->f_mode & (FMODE_READ|FMODE_WRITE));
        up(&s->open_sem);
        wake_up(&s->open_wait);
        unlock_kernel();
        return 0;
}
 
static /*const*/ struct file_operations cm_audio_fops = {
        owner:          THIS_MODULE,
        llseek:         no_llseek,
        read:           cm_read,
        write:          cm_write,
        poll:           cm_poll,
        ioctl:          cm_ioctl,
        mmap:           cm_mmap,
        open:           cm_open,
        release:        cm_release,
};
 
#ifdef CONFIG_SOUND_CMPCI_MIDI
/* --------------------------------------------------------------------- */
 
static ssize_t cm_midi_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        DECLARE_WAITQUEUE(wait, current);
        ssize_t ret;
        unsigned long flags;
        unsigned ptr;
        int cnt;
 
        VALIDATE_STATE(s);
        if (ppos != &file->f_pos)
                return -ESPIPE;
        if (!access_ok(VERIFY_WRITE, buffer, count))
                return -EFAULT;
        ret = 0;
        add_wait_queue(&s->midi.iwait, &wait);
        while (count > 0) {
                spin_lock_irqsave(&s->lock, flags);
                ptr = s->midi.ird;
                cnt = MIDIINBUF - ptr;
                if (s->midi.icnt < cnt)
                        cnt = s->midi.icnt;
                if (cnt <= 0)
                        __set_current_state(TASK_INTERRUPTIBLE);
                spin_unlock_irqrestore(&s->lock, flags);
                if (cnt > count)
                        cnt = count;
                if (cnt <= 0) {
                        if (file->f_flags & O_NONBLOCK)
                        {
                                if (!ret)
                                        ret = -EAGAIN;
                                break;
                        }
                        schedule();
                        if (signal_pending(current))
                        {
                                if (!ret)
                                        ret = -ERESTARTSYS;
                                break;
                        }
                        continue;
                }
                if (copy_to_user(buffer, s->midi.ibuf + ptr, cnt))
                {
                        if (!ret)
                                ret = -EFAULT;
                        break;
                }
                ptr = (ptr + cnt) % MIDIINBUF;
                spin_lock_irqsave(&s->lock, flags);
                s->midi.ird = ptr;
                s->midi.icnt -= cnt;
                spin_unlock_irqrestore(&s->lock, flags);
                count -= cnt;
                buffer += cnt;
                ret += cnt;
                break;
        }
        __set_current_state(TASK_RUNNING);
        remove_wait_queue(&s->midi.iwait, &wait);
        return ret;
}
 
static ssize_t cm_midi_write(struct file *file, const char *buffer, size_t count, loff_t *ppos)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        DECLARE_WAITQUEUE(wait, current);
        ssize_t ret;
        unsigned long flags;
        unsigned ptr;
        int cnt;
 
        VALIDATE_STATE(s);
        if (ppos != &file->f_pos)
                return -ESPIPE;
        if (!access_ok(VERIFY_READ, buffer, count))
                return -EFAULT;
        if (count == 0)
                return 0;
        ret = 0;
        add_wait_queue(&s->midi.owait, &wait);
        while (count > 0) {
                spin_lock_irqsave(&s->lock, flags);
                ptr = s->midi.owr;
                cnt = MIDIOUTBUF - ptr;
                if (s->midi.ocnt + cnt > MIDIOUTBUF)
                        cnt = MIDIOUTBUF - s->midi.ocnt;
                if (cnt <= 0) {
                        __set_current_state(TASK_INTERRUPTIBLE);
                        cm_handle_midi(s);
                }
                spin_unlock_irqrestore(&s->lock, flags);
                if (cnt > count)
                        cnt = count;
                if (cnt <= 0) {
                        if (file->f_flags & O_NONBLOCK)
                        {
                                if (!ret)
                                        ret = -EAGAIN;
                                break;
                        }
                        schedule();
                        if (signal_pending(current)) {
                                if (!ret)
                                        ret = -ERESTARTSYS;
                                break;
                        }
                        continue;
                }
                if (copy_from_user(s->midi.obuf + ptr, buffer, cnt))
                {
                        if (!ret)
                                ret = -EFAULT;
                        break;
                }
                ptr = (ptr + cnt) % MIDIOUTBUF;
                spin_lock_irqsave(&s->lock, flags);
                s->midi.owr = ptr;
                s->midi.ocnt += cnt;
                spin_unlock_irqrestore(&s->lock, flags);
                count -= cnt;
                buffer += cnt;
                ret += cnt;
                spin_lock_irqsave(&s->lock, flags);
                cm_handle_midi(s);
                spin_unlock_irqrestore(&s->lock, flags);
        }
        __set_current_state(TASK_RUNNING);
        remove_wait_queue(&s->midi.owait, &wait);
        return ret;
}
 
static unsigned int cm_midi_poll(struct file *file, struct poll_table_struct *wait)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        unsigned long flags;
        unsigned int mask = 0;
 
        VALIDATE_STATE(s);
        if (file->f_mode & FMODE_WRITE)
                poll_wait(file, &s->midi.owait, wait);
        if (file->f_mode & FMODE_READ)
                poll_wait(file, &s->midi.iwait, wait);
        spin_lock_irqsave(&s->lock, flags);
        if (file->f_mode & FMODE_READ) {
                if (s->midi.icnt > 0)
                        mask |= POLLIN | POLLRDNORM;
        }
        if (file->f_mode & FMODE_WRITE) {
                if (s->midi.ocnt < MIDIOUTBUF)
                        mask |= POLLOUT | POLLWRNORM;
        }
        spin_unlock_irqrestore(&s->lock, flags);
        return mask;
}
 
static int cm_midi_open(struct inode *inode, struct file *file)
{
        int minor = MINOR(inode->i_rdev);
        DECLARE_WAITQUEUE(wait, current);
        unsigned long flags;
        struct list_head *list;
        struct cm_state *s;
 
        for (list = devs.next; ; list = list->next) {
                if (list == &devs)
                        return -ENODEV;
                s = list_entry(list, struct cm_state, devs);
                if (s->dev_midi == minor)
                        break;
        }
        VALIDATE_STATE(s);
        file->private_data = s;
        /* wait for device to become free */
        down(&s->open_sem);
        while (s->open_mode & (file->f_mode << FMODE_MIDI_SHIFT)) {
                if (file->f_flags & O_NONBLOCK) {
                        up(&s->open_sem);
                        return -EBUSY;
                }
                add_wait_queue(&s->open_wait, &wait);
                __set_current_state(TASK_INTERRUPTIBLE);
                up(&s->open_sem);
                schedule();
                remove_wait_queue(&s->open_wait, &wait);
                set_current_state(TASK_RUNNING);
                if (signal_pending(current))
                        return -ERESTARTSYS;
                down(&s->open_sem);
        }
        spin_lock_irqsave(&s->lock, flags);
        if (!(s->open_mode & (FMODE_MIDI_READ | FMODE_MIDI_WRITE))) {
                s->midi.ird = s->midi.iwr = s->midi.icnt = 0;
                s->midi.ord = s->midi.owr = s->midi.ocnt = 0;
                /* enable MPU-401 */
                maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~0, UART_EN);
                outb(0xff, s->iomidi+1); /* reset command */
                if (!(inb(s->iomidi+1) & 0x80))
                        inb(s->iomidi);
                outb(0x3f, s->iomidi+1); /* uart command */
                if (!(inb(s->iomidi+1) & 0x80))
                        inb(s->iomidi);
                s->midi.ird = s->midi.iwr = s->midi.icnt = 0;
                init_timer(&s->midi.timer);
                s->midi.timer.expires = jiffies+1;
                s->midi.timer.data = (unsigned long)s;
                s->midi.timer.function = cm_midi_timer;
                add_timer(&s->midi.timer);
        }
        if (file->f_mode & FMODE_READ) {
                s->midi.ird = s->midi.iwr = s->midi.icnt = 0;
        }
        if (file->f_mode & FMODE_WRITE) {
                s->midi.ord = s->midi.owr = s->midi.ocnt = 0;
        }
        spin_unlock_irqrestore(&s->lock, flags);
        s->open_mode |= (file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ | FMODE_MIDI_WRITE);
        up(&s->open_sem);
        MOD_INC_USE_COUNT;
        return 0;
}
 
static int cm_midi_release(struct inode *inode, struct file *file)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        DECLARE_WAITQUEUE(wait, current);
        unsigned long flags;
        unsigned count, tmo;
 
        VALIDATE_STATE(s);
        lock_kernel();
 
        if (file->f_mode & FMODE_WRITE) {
                __set_current_state(TASK_INTERRUPTIBLE);
                add_wait_queue(&s->midi.owait, &wait);
                for (;;) {
                        spin_lock_irqsave(&s->lock, flags);
                        count = s->midi.ocnt;
                        spin_unlock_irqrestore(&s->lock, flags);
                        if (count <= 0)
                                break;
                        if (signal_pending(current))
                                break;
                        if (file->f_flags & O_NONBLOCK) {
                                remove_wait_queue(&s->midi.owait, &wait);
                                set_current_state(TASK_RUNNING);
                                unlock_kernel();
                                return -EBUSY;
                        }
                        tmo = (count * HZ) / 3100;
                        if (!schedule_timeout(tmo ? : 1) && tmo)
                                printk(KERN_DEBUG "cmpci: midi timed out??\n");
                }
                remove_wait_queue(&s->midi.owait, &wait);
                set_current_state(TASK_RUNNING);
        }
        down(&s->open_sem);
        s->open_mode &= ~((file->f_mode << FMODE_MIDI_SHIFT) & (FMODE_MIDI_READ|FMODE_MIDI_WRITE));
        spin_lock_irqsave(&s->lock, flags);
        if (!(s->open_mode & (FMODE_MIDI_READ | FMODE_MIDI_WRITE))) {
                del_timer(&s->midi.timer);
                outb(0xff, s->iomidi+1); /* reset command */
                if (!(inb(s->iomidi+1) & 0x80))
                        inb(s->iomidi);
                /* disable MPU-401 */
                maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~UART_EN, 0);
        }
        spin_unlock_irqrestore(&s->lock, flags);
        up(&s->open_sem);
        wake_up(&s->open_wait);
        unlock_kernel();
        return 0;
}
 
static /*const*/ struct file_operations cm_midi_fops = {
        owner:          THIS_MODULE,
        llseek:         no_llseek,
        read:           cm_midi_read,
        write:          cm_midi_write,
        poll:           cm_midi_poll,
        open:           cm_midi_open,
        release:        cm_midi_release,
};
#endif
 
/* --------------------------------------------------------------------- */
 
#ifdef CONFIG_SOUND_CMPCI_FM
static int cm_dmfm_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
{
        static const unsigned char op_offset[18] = {
                0x00, 0x01, 0x02, 0x03, 0x04, 0x05,
                0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D,
                0x10, 0x11, 0x12, 0x13, 0x14, 0x15
        };
        struct cm_state *s = (struct cm_state *)file->private_data;
        struct dm_fm_voice v;
        struct dm_fm_note n;
        struct dm_fm_params p;
        unsigned int io;
        unsigned int regb;
 
        switch (cmd) {
        case FM_IOCTL_RESET:
                for (regb = 0xb0; regb < 0xb9; regb++) {
                        outb(regb, s->iosynth);
                        outb(0, s->iosynth+1);
                        outb(regb, s->iosynth+2);
                        outb(0, s->iosynth+3);
                }
                return 0;
 
        case FM_IOCTL_PLAY_NOTE:
                if (copy_from_user(&n, (void *)arg, sizeof(n)))
                        return -EFAULT;
                if (n.voice >= 18)
                        return -EINVAL;
                if (n.voice >= 9) {
                        regb = n.voice - 9;
                        io = s->iosynth+2;
                } else {
                        regb = n.voice;
                        io = s->iosynth;
                }
                outb(0xa0 + regb, io);
                outb(n.fnum & 0xff, io+1);
                outb(0xb0 + regb, io);
                outb(((n.fnum >> 8) & 3) | ((n.octave & 7) << 2) | ((n.key_on & 1) << 5), io+1);
                return 0;
 
        case FM_IOCTL_SET_VOICE:
                if (copy_from_user(&v, (void *)arg, sizeof(v)))
                        return -EFAULT;
                if (v.voice >= 18)
                        return -EINVAL;
                regb = op_offset[v.voice];
                io = s->iosynth + ((v.op & 1) << 1);
                outb(0x20 + regb, io);
                outb(((v.am & 1) << 7) | ((v.vibrato & 1) << 6) | ((v.do_sustain & 1) << 5) |
                     ((v.kbd_scale & 1) << 4) | (v.harmonic & 0xf), io+1);
                outb(0x40 + regb, io);
                outb(((v.scale_level & 0x3) << 6) | (v.volume & 0x3f), io+1);
                outb(0x60 + regb, io);
                outb(((v.attack & 0xf) << 4) | (v.decay & 0xf), io+1);
                outb(0x80 + regb, io);
                outb(((v.sustain & 0xf) << 4) | (v.release & 0xf), io+1);
                outb(0xe0 + regb, io);
                outb(v.waveform & 0x7, io+1);
                if (n.voice >= 9) {
                        regb = n.voice - 9;
                        io = s->iosynth+2;
                } else {
                        regb = n.voice;
                        io = s->iosynth;
                }
                outb(0xc0 + regb, io);
                outb(((v.right & 1) << 5) | ((v.left & 1) << 4) | ((v.feedback & 7) << 1) |
                     (v.connection & 1), io+1);
                return 0;
 
        case FM_IOCTL_SET_PARAMS:
                if (copy_from_user(&p, (void *)arg, sizeof(p)))
                        return -EFAULT;
                outb(0x08, s->iosynth);
                outb((p.kbd_split & 1) << 6, s->iosynth+1);
                outb(0xbd, s->iosynth);
                outb(((p.am_depth & 1) << 7) | ((p.vib_depth & 1) << 6) | ((p.rhythm & 1) << 5) | ((p.bass & 1) << 4) |
                     ((p.snare & 1) << 3) | ((p.tomtom & 1) << 2) | ((p.cymbal & 1) << 1) | (p.hihat & 1), s->iosynth+1);
                return 0;
 
        case FM_IOCTL_SET_OPL:
                outb(4, s->iosynth+2);
                outb(arg, s->iosynth+3);
                return 0;
 
        case FM_IOCTL_SET_MODE:
                outb(5, s->iosynth+2);
                outb(arg & 1, s->iosynth+3);
                return 0;
        }
        return -EINVAL;
}
 
static int cm_dmfm_open(struct inode *inode, struct file *file)
{
        int minor = MINOR(inode->i_rdev);
        DECLARE_WAITQUEUE(wait, current);
        struct list_head *list;
        struct cm_state *s;
 
        for (list = devs.next; ; list = list->next) {
                if (list == &devs)
                        return -ENODEV;
                s = list_entry(list, struct cm_state, devs);
                if (s->dev_dmfm == minor)
                        break;
        }
        VALIDATE_STATE(s);
        file->private_data = s;
        /* wait for device to become free */
        down(&s->open_sem);
        while (s->open_mode & FMODE_DMFM) {
                if (file->f_flags & O_NONBLOCK) {
                        up(&s->open_sem);
                        return -EBUSY;
                }
                add_wait_queue(&s->open_wait, &wait);
                __set_current_state(TASK_INTERRUPTIBLE);
                up(&s->open_sem);
                schedule();
                remove_wait_queue(&s->open_wait, &wait);
                set_current_state(TASK_RUNNING);
                if (signal_pending(current))
                        return -ERESTARTSYS;
                down(&s->open_sem);
        }
        /* init the stuff */
        outb(1, s->iosynth);
        outb(0x20, s->iosynth+1); /* enable waveforms */
        outb(4, s->iosynth+2);
        outb(0, s->iosynth+3);  /* no 4op enabled */
        outb(5, s->iosynth+2);
        outb(1, s->iosynth+3);  /* enable OPL3 */
        s->open_mode |= FMODE_DMFM;
        up(&s->open_sem);
        MOD_INC_USE_COUNT;
        return 0;
}
 
static int cm_dmfm_release(struct inode *inode, struct file *file)
{
        struct cm_state *s = (struct cm_state *)file->private_data;
        unsigned int regb;
 
        VALIDATE_STATE(s);
        lock_kernel();
        down(&s->open_sem);
        s->open_mode &= ~FMODE_DMFM;
        for (regb = 0xb0; regb < 0xb9; regb++) {
                outb(regb, s->iosynth);
                outb(0, s->iosynth+1);
                outb(regb, s->iosynth+2);
                outb(0, s->iosynth+3);
        }
        up(&s->open_sem);
        wake_up(&s->open_wait);
        unlock_kernel();
        return 0;
}
 
static /*const*/ struct file_operations cm_dmfm_fops = {
        owner:          THIS_MODULE,
        llseek:         no_llseek,
        ioctl:          cm_dmfm_ioctl,
        open:           cm_dmfm_open,
        release:        cm_dmfm_release,
};
#endif /* CONFIG_SOUND_CMPCI_FM */
 
 
 
static struct initvol {
        int mixch;
        int vol;
} initvol[] __initdata = {
        { SOUND_MIXER_WRITE_CD, 0x4f4f },
        { SOUND_MIXER_WRITE_LINE, 0x4f4f },
        { SOUND_MIXER_WRITE_MIC, 0x4f4f },
        { SOUND_MIXER_WRITE_SYNTH, 0x4f4f },
        { SOUND_MIXER_WRITE_VOLUME, 0x4f4f },
        { SOUND_MIXER_WRITE_PCM, 0x4f4f }
};
 
/* check chip version and capability */
static int query_chip(struct cm_state *s)
{
        int ChipVersion = -1;
        unsigned char RegValue;
 
        // check reg 0Ch, bit 24-31
        RegValue = inb(s->iobase + CODEC_CMI_INT_HLDCLR + 3);
        if (RegValue == 0) {
            // check reg 08h, bit 24-28
            RegValue = inb(s->iobase + CODEC_CMI_CHFORMAT + 3);
            RegValue &= 0x1f;
            if (RegValue == 0) {
                ChipVersion = 33;
                s->max_channels = 4;
                s->capability |= CAN_AC3_SW;
                s->capability |= CAN_DUAL_DAC;
            } else {
                ChipVersion = 37;
                s->max_channels = 4;
                s->capability |= CAN_AC3_HW;
                s->capability |= CAN_DUAL_DAC;
            }
        } else {
            // check reg 0Ch, bit 26
            if (RegValue & (1 << (26-24))) {
                ChipVersion = 39;
                if (RegValue & (1 << (24-24)))
                    s->max_channels  = 6;
                else
                    s->max_channels = 4;
                s->capability |= CAN_AC3_HW;
                s->capability |= CAN_DUAL_DAC;
                s->capability |= CAN_MULTI_CH_HW;
            } else {
                ChipVersion = 55; // 4 or 6 channels
                s->max_channels  = 6;
                s->capability |= CAN_AC3_HW;
                s->capability |= CAN_DUAL_DAC;
                s->capability |= CAN_MULTI_CH_HW;
            }
        }
        // still limited to number of speakers
        if (s->max_channels > s->speakers)
                s->max_channels = s->speakers;
        return ChipVersion;
}
 
#ifdef CONFIG_SOUND_CMPCI_MIDI
static  int     mpuio = CONFIG_SOUND_CMPCI_MPUIO;
#else
static  int     mpuio;
#endif
#ifdef CONFIG_SOUND_CMPCI_FM
static  int     fmio = CONFIG_SOUND_CMPCI_FMIO;
#else
static  int     fmio;
#endif
#ifdef CONFIG_SOUND_CMPCI_SPDIFINVERSE
static  int     spdif_inverse = 1;
#else
static  int     spdif_inverse;
#endif
#ifdef CONFIG_SOUND_CMPCI_SPDIFLOOP
static  int     spdif_loop = 1;
#else
static  int     spdif_loop;
#endif
#ifdef CONFIG_SOUND_CMPCI_SPEAKERS
static  int     speakers = CONFIG_SOUND_CMPCI_SPEAKERS;
#else
static  int     speakers = 2;
#endif
#ifdef CONFIG_SOUND_CMPCI_LINE_REAR
static  int     use_line_as_rear = 1;
#else
static  int     use_line_as_rear;
#endif
#ifdef CONFIG_SOUND_CMPCI_LINE_BASS
static  int     use_line_as_bass = 1;
#else
static  int     use_line_as_bass;
#endif
#ifdef CONFIG_SOUND_CMPCI_MIC_BASS
static  int     use_mic_as_bass = 1;
#else
static  int     use_mic_as_bass = 0;
#endif
#ifdef CONFIG_SOUND_CMPCI_JOYSTICK
static  int     joystick = 1;
#else
static  int     joystick;
#endif
static  int     mic_boost = 0;
MODULE_PARM(mpuio, "i");
MODULE_PARM(fmio, "i");
MODULE_PARM(spdif_inverse, "i");
MODULE_PARM(spdif_loop, "i");
MODULE_PARM(speakers, "i");
MODULE_PARM(use_line_as_rear, "i");
MODULE_PARM(use_line_as_bass, "i");
MODULE_PARM(use_mic_as_bass, "i");
MODULE_PARM(joystick, "i");
MODULE_PARM(mic_boost, "i");
MODULE_PARM_DESC(mpuio, "(0x330, 0x320, 0x310, 0x300) Base of MPU-401, 0 to disable");
MODULE_PARM_DESC(fmio, "(0x388, 0x3C8, 0x3E0) Base of OPL3, 0 to disable");
MODULE_PARM_DESC(spdif_inverse, "(1/0) Invert S/PDIF-in signal");
MODULE_PARM_DESC(spdif_loop, "(1/0) Route S/PDIF-in to S/PDIF-out directly");
MODULE_PARM_DESC(speakers, "(2-6) Number of speakers you connect");
MODULE_PARM_DESC(use_line_as_rear, "(1/0) Use line-in jack as rear-out");
MODULE_PARM_DESC(use_line_as_bass, "(1/0) Use line-in jack as bass/center");
MODULE_PARM_DESC(use_mic_as_bass, "(1/0) Use mic-in jack as bass/center");
MODULE_PARM_DESC(joystick, "(1/0) Enable joystick interface, still need joystick driver");
MODULE_PARM_DESC(mic_boost, "(1/0) Enable microphone boost");
 
static int __devinit cm_probe(struct pci_dev *pcidev, const struct pci_device_id *pciid)
{
        struct cm_state *s;
        mm_segment_t fs;
        int i, val, ret;
        unsigned char reg_mask = 0;
        struct {
                unsigned short  deviceid;
                char            *devicename;
        } devicetable[] =
        {
                { PCI_DEVICE_ID_CMEDIA_CM8338A, "CM8338A" },
                { PCI_DEVICE_ID_CMEDIA_CM8338B, "CM8338B" },
                { PCI_DEVICE_ID_CMEDIA_CM8738,  "CM8738" },
                { PCI_DEVICE_ID_CMEDIA_CM8738B, "CM8738B" },
        };
        char    *devicename = "unknown";
        if ((ret = pci_enable_device(pcidev)))
                return ret;
        if (pcidev->irq == 0)
                return -ENODEV;
        s = kmalloc(sizeof(*s), GFP_KERNEL);
        if (!s) {
                printk(KERN_WARNING "cmpci: out of memory\n");
                return -ENOMEM;
        }
        /* search device name */
        for (i = 0; i < sizeof(devicetable) / sizeof(devicetable[0]); i++) {
                if (devicetable[i].deviceid == pcidev->device)
                {
                        devicename = devicetable[i].devicename;
                        break;
                }
        }
        memset(s, 0, sizeof(struct cm_state));
        init_waitqueue_head(&s->dma_adc.wait);
        init_waitqueue_head(&s->dma_dac.wait);
        init_waitqueue_head(&s->open_wait);
        init_waitqueue_head(&s->midi.iwait);
        init_waitqueue_head(&s->midi.owait);
        init_MUTEX(&s->open_sem);
        spin_lock_init(&s->lock);
        s->magic = CM_MAGIC;
        s->iobase = pci_resource_start(pcidev, 0);
#ifdef CONFIG_IA64
        /* The IA64 quirk handler didn't fix us up */
        if (s->iobase == 0xff00)
        {
                kfree(s);
                return -ENODEV;
        }
#endif
        s->iosynth = fmio;
        s->iomidi = mpuio;
        s->gameport.io = 0x200;
        s->status = 0;
        /* range check */
        if (speakers < 2)
                speakers = 2;
        else if (speakers > 6)
                speakers = 6;
        s->speakers = speakers;
        if (s->iobase == 0)
        {
                kfree(s);
                return -ENODEV;
        }
        s->irq = pcidev->irq;
 
        if (!request_region(s->iobase, CM_EXTENT_CODEC, "cmpci")) {
                printk(KERN_ERR "cmpci: io ports %#x-%#x in use\n", s->iobase, s->iobase+CM_EXTENT_CODEC-1);
                goto err_region5;
        }
#ifdef CONFIG_SOUND_CMPCI_MIDI
        /* disable MPU-401 */
        maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~0x04, 0);
        if (s->iomidi) {
            if (!request_region(s->iomidi, CM_EXTENT_MIDI, "cmpci Midi")) {
                printk(KERN_ERR "cmpci: io ports %#x-%#x in use\n", s->iomidi, s->iomidi+CM_EXTENT_MIDI-1);
                s->iomidi = 0;
            } else {
                /* set IO based at 0x330 */
                switch (s->iomidi) {
                    case 0x330:
                        reg_mask = 0;
                        break;
                    case 0x320:
                        reg_mask = 0x20;
                        break;
                    case 0x310:
                        reg_mask = 0x40;
                        break;
                    case 0x300:
                        reg_mask = 0x60;
                        break;
                    default:
                        s->iomidi = 0;
                        break;
                }
                outb((inb(s->iobase + CODEC_CMI_LEGACY_CTRL + 3) & ~0x60) | reg_mask, s->iobase + CODEC_CMI_LEGACY_CTRL + 3);
                /* enable MPU-401 */
                if (s->iomidi) {
                    maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~0, 0x04);
                }
            }
        }
#endif
#ifdef CONFIG_SOUND_CMPCI_FM
        /* disable FM */
        maskb(s->iobase + CODEC_CMI_MISC_CTRL + 2, ~8, 0);
        if (s->iosynth) {
            if (!request_region(s->iosynth, CM_EXTENT_SYNTH, "cmpci FM")) {
                printk(KERN_ERR "cmpci: io ports %#x-%#x in use\n", s->iosynth, s->iosynth+CM_EXTENT_SYNTH-1);
                s->iosynth = 0;
            } else {
                /* set IO based at 0x388 */
                switch (s->iosynth) {
                    case 0x388:
                        reg_mask = 0;
                        break;
                    case 0x3C8:
                        reg_mask = 0x01;
                        break;
                    case 0x3E0:
                        reg_mask = 0x02;
                        break;
                    case 0x3E8:
                        reg_mask = 0x03;
                        break;
                    default:
                        s->iosynth = 0;
                        break;
                }
                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 3, ~0x03, reg_mask);
                /* enable FM */
                if (s->iosynth) {
                    maskb(s->iobase + CODEC_CMI_MISC_CTRL + 2, ~0, 8);
                }
            }
        }
#endif
        /* enable joystick */
        if (joystick) {
                if (s->gameport.io && !request_region(s->gameport.io, CM_EXTENT_GAME, "cmpci GAME")) {
                        printk(KERN_ERR "cmpci: gameport io ports in use\n");
                        s->gameport.io = 0;
                } else
                        maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~0, 0x02);
        } else {
                maskb(s->iobase + CODEC_CMI_FUNCTRL1, ~0x02, 0);
                s->gameport.io = 0;
        }
        /* initialize codec registers */
        outb(0, s->iobase + CODEC_CMI_INT_HLDCLR + 2);  /* disable ints */
        outb(0, s->iobase + CODEC_CMI_FUNCTRL0 + 2); /* disable channels */
        /* reset mixer */
        wrmixer(s, DSP_MIX_DATARESETIDX, 0);
 
        /* request irq */
        if (request_irq(s->irq, cm_interrupt, SA_SHIRQ, "cmpci", s)) {
                printk(KERN_ERR "cmpci: irq %u in use\n", s->irq);
                goto err_irq;
        }
        printk(KERN_INFO "cmpci: found %s adapter at io %#x irq %u\n",
               devicename, s->iobase, s->irq);
        /* register devices */
        if ((s->dev_audio = register_sound_dsp(&cm_audio_fops, -1)) < 0) {
                ret = s->dev_audio;
                goto err_dev1;
        }
        if ((s->dev_mixer = register_sound_mixer(&cm_mixer_fops, -1)) < 0) {
                ret = s->dev_mixer;
                goto err_dev2;
        }
#ifdef CONFIG_SOUND_CMPCI_MIDI
        if ((s->dev_midi = register_sound_midi(&cm_midi_fops, -1)) < 0) {
                ret = s->dev_midi;
                goto err_dev3;
        }
#endif
#ifdef CONFIG_SOUND_CMPCI_FM
        if ((s->dev_dmfm = register_sound_special(&cm_dmfm_fops, 15 /* ?? */)) < 0) {
                ret = s->dev_dmfm;
                goto err_dev4;
        }
#endif
        pci_set_master(pcidev); /* enable bus mastering */
        /* initialize the chips */
        fs = get_fs();
        set_fs(KERNEL_DS);
        /* set mixer output */
        frobindir(s, DSP_MIX_OUTMIXIDX, 0x1f, 0x1f);
        /* set mixer input */
        val = SOUND_MASK_LINE|SOUND_MASK_SYNTH|SOUND_MASK_CD|SOUND_MASK_MIC;
        mixer_ioctl(s, SOUND_MIXER_WRITE_RECSRC, (unsigned long)&val);
        for (i = 0; i < sizeof(initvol)/sizeof(initvol[0]); i++) {
                val = initvol[i].vol;
                mixer_ioctl(s, initvol[i].mixch, (unsigned long)&val);
        }
        /* use channel 1 for record, channel 0 for play */
        maskb(s->iobase + CODEC_CMI_FUNCTRL0, ~0, CHADC1);
        /* turn off VMIC3 - mic boost */
        if (mic_boost)
                maskb(s->iobase + CODEC_CMI_MIXER2, ~1, 0);
        else
                maskb(s->iobase + CODEC_CMI_MIXER2, ~0, 1);
        s->deviceid = pcidev->device;
 
        if (pcidev->device == PCI_DEVICE_ID_CMEDIA_CM8738) {
 
                /* chip version and hw capability check */
                s->chip_version = query_chip(s);
                printk(KERN_INFO "cmpci: chip version = 0%d\n", s->chip_version);
 
                /* seet SPDIF-in inverse before enable SPDIF loop */
                set_spdifin_inverse(s, spdif_inverse);
 
                /* enable SPDIF loop */
                set_spdif_loop(s, spdif_loop);
 
                /* use SPDIF in #1 */
                set_spdifin_channel2(s, 0);
 
                if (use_line_as_rear) {
                        s->capability |= CAN_LINE_AS_REAR;
                        s->status |= DO_LINE_AS_REAR;
                        maskb(s->iobase + CODEC_CMI_MIXER1, ~0, SPK4);
                } else
                        maskb(s->iobase + CODEC_CMI_MIXER1, ~SPK4, 0);
                if (s->chip_version >= 39) {
                        if (use_line_as_bass) {
                                s->capability |= CAN_LINE_AS_BASS;
                                s->status |= DO_LINE_AS_BASS;
                                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 1, ~0, CB2LIN);
                        } else
                                maskb(s->iobase + CODEC_CMI_LEGACY_CTRL + 1, ~CB2LIN, 0);
                        if (use_mic_as_bass) {
                                s->capability |= CAN_MIC_AS_BASS;
                                s->status |= DO_MIC_AS_BASS;
                                maskb(s->iobase + CODEC_CMI_MISC, ~0, 0x04);
                        } else
                                maskb(s->iobase + CODEC_CMI_MISC, ~0x04, 0);
                }
        } else {
                s->chip_version = 0;
                /* 8338 will fall here */
                s->max_channels = 2;
        }
        /* register gameport */
        if (joystick)
                gameport_register_port(&s->gameport);
        /* store it in the driver field */
        pci_set_drvdata(pcidev, s);
        /* put it into driver list */
        list_add_tail(&s->devs, &devs);
        /* increment devindex */
        if (devindex < NR_DEVICE-1)
                devindex++;
        return 0;
 
#ifdef CONFIG_SOUND_CMPCI_FM
        unregister_sound_special(s->dev_dmfm);
err_dev4:
#endif
#ifdef CONFIG_SOUND_CMPCI_MIDI
        unregister_sound_midi(s->dev_midi);
err_dev3:
#endif
        unregister_sound_mixer(s->dev_mixer);
err_dev2:
        unregister_sound_dsp(s->dev_audio);
err_dev1:
        printk(KERN_ERR "cmpci: cannot register misc device\n");
        free_irq(s->irq, s);
err_irq:
        if (s->gameport.io)
                release_region(s->gameport.io, CM_EXTENT_GAME);
#ifdef CONFIG_SOUND_CMPCI_FM
        if (s->iosynth) release_region(s->iosynth, CM_EXTENT_SYNTH);
#endif
#ifdef CONFIG_SOUND_CMPCI_MIDI
        if (s->iomidi) release_region(s->iomidi, CM_EXTENT_MIDI);
#endif
        release_region(s->iobase, CM_EXTENT_CODEC);
err_region5:
        kfree(s);
        return ret;
}
 
/* --------------------------------------------------------------------- */
 
MODULE_AUTHOR("ChenLi Tien, cltien@cmedia.com.tw");
MODULE_DESCRIPTION("CM8x38 Audio Driver");
MODULE_LICENSE("GPL");
 
static void __devinit cm_remove(struct pci_dev *dev)
{
        struct cm_state *s = pci_get_drvdata(dev);
 
        if (!s)
                return;
        list_del(&s->devs);
        outb(0, s->iobase + CODEC_CMI_INT_HLDCLR + 2);  /* disable ints */
        synchronize_irq();
        outb(0, s->iobase + CODEC_CMI_FUNCTRL0 + 2); /* disable channels */
        free_irq(s->irq, s);
 
        /* reset mixer */
        wrmixer(s, DSP_MIX_DATARESETIDX, 0);
 
        if (s->gameport.io) {
                gameport_unregister_port(&s->gameport);
                release_region(s->gameport.io, CM_EXTENT_GAME);
        }
        release_region(s->iobase, CM_EXTENT_CODEC);
#ifdef CONFIG_SOUND_CMPCI_MIDI
        if (s->iomidi) release_region(s->iomidi, CM_EXTENT_MIDI);
#endif
#ifdef CONFIG_SOUND_CMPCI_FM
        if (s->iosynth) release_region(s->iosynth, CM_EXTENT_SYNTH);
#endif
        unregister_sound_dsp(s->dev_audio);
        unregister_sound_mixer(s->dev_mixer);
#ifdef CONFIG_SOUND_CMPCI_MIDI
        unregister_sound_midi(s->dev_midi);
#endif
#ifdef CONFIG_SOUND_CMPCI_FM
        unregister_sound_special(s->dev_dmfm);
#endif
        kfree(s);
        pci_set_drvdata(dev, NULL);
}
 
static struct pci_device_id id_table[] __devinitdata = {
        { PCI_VENDOR_ID_CMEDIA, PCI_DEVICE_ID_CMEDIA_CM8738, PCI_ANY_ID, PCI_ANY_ID, 0, 0 },
        { PCI_VENDOR_ID_CMEDIA, PCI_DEVICE_ID_CMEDIA_CM8338A, PCI_ANY_ID, PCI_ANY_ID, 0, 0 },
        { PCI_VENDOR_ID_CMEDIA, PCI_DEVICE_ID_CMEDIA_CM8338B, PCI_ANY_ID, PCI_ANY_ID, 0, 0 },
        { 0, }
};
 
MODULE_DEVICE_TABLE(pci, id_table);
 
static struct pci_driver cm_driver = {
       name: "cmpci",
       id_table: id_table,
       probe: cm_probe,
       remove: cm_remove
};
 
static int __init init_cmpci(void)
{
        if (!pci_present())   /* No PCI bus in this machine! */
                return -ENODEV;
        printk(KERN_INFO "cmpci: version $Revision: 1.1.1.1 $ time " __TIME__ " " __DATE__ "\n");
        return pci_module_init(&cm_driver);
}
 
static void __exit cleanup_cmpci(void)
{
        printk(KERN_INFO "cmpci: unloading\n");
        pci_unregister_driver(&cm_driver);
}
 
module_init(init_cmpci);
module_exit(cleanup_cmpci);
 
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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [drivers/] [sound/] [cmpci.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1275	phoenix	`/*****************************************************************************/`
2			`/*`
3			`* cmpci.c -- C-Media PCI audio driver.`
4			`*`
5			`* Copyright (C) 1999 ChenLi Tien (cltien@cmedia.com.tw)`
6			`* C-media support (support@cmedia.com.tw)`
7			`*`
8			`* Based on the PCI drivers by Thomas Sailer (sailer@ife.ee.ethz.ch)`
9			`*`
10			`* For update, visit:`
11			`* http://members.home.net/puresoft/cmedia.html`
12			`* http://www.cmedia.com.tw`
13			`*`
14			`* This program is free software; you can redistribute it and/or modify`
15			`* it under the terms of the GNU General Public License as published by`
16			`* the Free Software Foundation; either version 2 of the License, or`
17			`* (at your option) any later version.`
18			`*`
19			`* This program is distributed in the hope that it will be useful,`
20			`* but WITHOUT ANY WARRANTY; without even the implied warranty of`
21			`* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
22			`* GNU General Public License for more details.`
23			`*`
24			`* You should have received a copy of the GNU General Public License`
25			`* along with this program; if not, write to the Free Software`
26			`* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.`
27			`*`
28			`* Special thanks to David C. Niemi, Jan Pfeifer`
29			`*`
30			`*`
31			`* Module command line parameters:`
32			`* none so far`
33			`*`
34			`*`
35			`* Supported devices:`
36			`* /dev/dsp standard /dev/dsp device, (mostly) OSS compatible`
37			`* /dev/mixer standard /dev/mixer device, (mostly) OSS compatible`
38			`* /dev/midi simple MIDI UART interface, no ioctl`
39			`*`
40			`* The card has both an FM and a Wavetable synth, but I have to figure`