1/*
   2 *  Driver for Cirrus Logic CS4281 based PCI soundcard
   3 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
   4 *
   5 *
   6 *   This program is free software; you can redistribute it and/or modify
   7 *   it under the terms of the GNU General Public License as published by
   8 *   the Free Software Foundation; either version 2 of the License, or
   9 *   (at your option) any later version.
  10 *
  11 *   This program is distributed in the hope that it will be useful,
  12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *   GNU General Public License for more details.
  15 *
  16 *   You should have received a copy of the GNU General Public License
  17 *   along with this program; if not, write to the Free Software
  18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 *
  20 */
  21
  22#include <asm/io.h>
  23#include <linux/delay.h>
  24#include <linux/interrupt.h>
  25#include <linux/init.h>
  26#include <linux/pci.h>
  27#include <linux/slab.h>
  28#include <linux/gameport.h>
  29#include <linux/module.h>
  30#include <sound/core.h>
  31#include <sound/control.h>
  32#include <sound/pcm.h>
  33#include <sound/rawmidi.h>
  34#include <sound/ac97_codec.h>
  35#include <sound/tlv.h>
  36#include <sound/opl3.h>
  37#include <sound/initval.h>
  38
  39
  40MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  41MODULE_DESCRIPTION("Cirrus Logic CS4281");
  42MODULE_LICENSE("GPL");
  43MODULE_SUPPORTED_DEVICE("{{Cirrus Logic,CS4281}}");
  44
  45static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
  46static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
  47static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable switches */
  48static bool dual_codec[SNDRV_CARDS];	/* dual codec */
  49
  50module_param_array(index, int, NULL, 0444);
  51MODULE_PARM_DESC(index, "Index value for CS4281 soundcard.");
  52module_param_array(id, charp, NULL, 0444);
  53MODULE_PARM_DESC(id, "ID string for CS4281 soundcard.");
  54module_param_array(enable, bool, NULL, 0444);
  55MODULE_PARM_DESC(enable, "Enable CS4281 soundcard.");
  56module_param_array(dual_codec, bool, NULL, 0444);
  57MODULE_PARM_DESC(dual_codec, "Secondary Codec ID (0 = disabled).");
  58
  59/*
  60 *  Direct registers
  61 */
  62
  63#define CS4281_BA0_SIZE		0x1000
  64#define CS4281_BA1_SIZE		0x10000
  65
  66/*
  67 *  BA0 registers
  68 */
  69#define BA0_HISR		0x0000	/* Host Interrupt Status Register */
  70#define BA0_HISR_INTENA		(1<<31)	/* Internal Interrupt Enable Bit */
  71#define BA0_HISR_MIDI		(1<<22)	/* MIDI port interrupt */
  72#define BA0_HISR_FIFOI		(1<<20)	/* FIFO polled interrupt */
  73#define BA0_HISR_DMAI		(1<<18)	/* DMA interrupt (half or end) */
  74#define BA0_HISR_FIFO(c)	(1<<(12+(c))) /* FIFO channel interrupt */
  75#define BA0_HISR_DMA(c)		(1<<(8+(c)))  /* DMA channel interrupt */
  76#define BA0_HISR_GPPI		(1<<5)	/* General Purpose Input (Primary chip) */
  77#define BA0_HISR_GPSI		(1<<4)	/* General Purpose Input (Secondary chip) */
  78#define BA0_HISR_GP3I		(1<<3)	/* GPIO3 pin Interrupt */
  79#define BA0_HISR_GP1I		(1<<2)	/* GPIO1 pin Interrupt */
  80#define BA0_HISR_VUPI		(1<<1)	/* VOLUP pin Interrupt */
  81#define BA0_HISR_VDNI		(1<<0)	/* VOLDN pin Interrupt */
  82
  83#define BA0_HICR		0x0008	/* Host Interrupt Control Register */
  84#define BA0_HICR_CHGM		(1<<1)	/* INTENA Change Mask */
  85#define BA0_HICR_IEV		(1<<0)	/* INTENA Value */
  86#define BA0_HICR_EOI		(3<<0)	/* End of Interrupt command */
  87
  88#define BA0_HIMR		0x000c	/* Host Interrupt Mask Register */
  89					/* Use same contants as for BA0_HISR */
  90
  91#define BA0_IIER		0x0010	/* ISA Interrupt Enable Register */
  92
  93#define BA0_HDSR0		0x00f0	/* Host DMA Engine 0 Status Register */
  94#define BA0_HDSR1		0x00f4	/* Host DMA Engine 1 Status Register */
  95#define BA0_HDSR2		0x00f8	/* Host DMA Engine 2 Status Register */
  96#define BA0_HDSR3		0x00fc	/* Host DMA Engine 3 Status Register */
  97
  98#define BA0_HDSR_CH1P		(1<<25)	/* Channel 1 Pending */
  99#define BA0_HDSR_CH2P		(1<<24)	/* Channel 2 Pending */
 100#define BA0_HDSR_DHTC		(1<<17)	/* DMA Half Terminal Count */
 101#define BA0_HDSR_DTC		(1<<16)	/* DMA Terminal Count */
 102#define BA0_HDSR_DRUN		(1<<15)	/* DMA Running */
 103#define BA0_HDSR_RQ		(1<<7)	/* Pending Request */
 104
 105#define BA0_DCA0		0x0110	/* Host DMA Engine 0 Current Address */
 106#define BA0_DCC0		0x0114	/* Host DMA Engine 0 Current Count */
 107#define BA0_DBA0		0x0118	/* Host DMA Engine 0 Base Address */
 108#define BA0_DBC0		0x011c	/* Host DMA Engine 0 Base Count */
 109#define BA0_DCA1		0x0120	/* Host DMA Engine 1 Current Address */
 110#define BA0_DCC1		0x0124	/* Host DMA Engine 1 Current Count */
 111#define BA0_DBA1		0x0128	/* Host DMA Engine 1 Base Address */
 112#define BA0_DBC1		0x012c	/* Host DMA Engine 1 Base Count */
 113#define BA0_DCA2		0x0130	/* Host DMA Engine 2 Current Address */
 114#define BA0_DCC2		0x0134	/* Host DMA Engine 2 Current Count */
 115#define BA0_DBA2		0x0138	/* Host DMA Engine 2 Base Address */
 116#define BA0_DBC2		0x013c	/* Host DMA Engine 2 Base Count */
 117#define BA0_DCA3		0x0140	/* Host DMA Engine 3 Current Address */
 118#define BA0_DCC3		0x0144	/* Host DMA Engine 3 Current Count */
 119#define BA0_DBA3		0x0148	/* Host DMA Engine 3 Base Address */
 120#define BA0_DBC3		0x014c	/* Host DMA Engine 3 Base Count */
 121#define BA0_DMR0		0x0150	/* Host DMA Engine 0 Mode */
 122#define BA0_DCR0		0x0154	/* Host DMA Engine 0 Command */
 123#define BA0_DMR1		0x0158	/* Host DMA Engine 1 Mode */
 124#define BA0_DCR1		0x015c	/* Host DMA Engine 1 Command */
 125#define BA0_DMR2		0x0160	/* Host DMA Engine 2 Mode */
 126#define BA0_DCR2		0x0164	/* Host DMA Engine 2 Command */
 127#define BA0_DMR3		0x0168	/* Host DMA Engine 3 Mode */
 128#define BA0_DCR3		0x016c	/* Host DMA Engine 3 Command */
 129
 130#define BA0_DMR_DMA		(1<<29)	/* Enable DMA mode */
 131#define BA0_DMR_POLL		(1<<28)	/* Enable poll mode */
 132#define BA0_DMR_TBC		(1<<25)	/* Transfer By Channel */
 133#define BA0_DMR_CBC		(1<<24)	/* Count By Channel (0 = frame resolution) */
 134#define BA0_DMR_SWAPC		(1<<22)	/* Swap Left/Right Channels */
 135#define BA0_DMR_SIZE20		(1<<20)	/* Sample is 20-bit */
 136#define BA0_DMR_USIGN		(1<<19)	/* Unsigned */
 137#define BA0_DMR_BEND		(1<<18)	/* Big Endian */
 138#define BA0_DMR_MONO		(1<<17)	/* Mono */
 139#define BA0_DMR_SIZE8		(1<<16)	/* Sample is 8-bit */
 140#define BA0_DMR_TYPE_DEMAND	(0<<6)
 141#define BA0_DMR_TYPE_SINGLE	(1<<6)
 142#define BA0_DMR_TYPE_BLOCK	(2<<6)
 143#define BA0_DMR_TYPE_CASCADE	(3<<6)	/* Not supported */
 144#define BA0_DMR_DEC		(1<<5)	/* Access Increment (0) or Decrement (1) */
 145#define BA0_DMR_AUTO		(1<<4)	/* Auto-Initialize */
 146#define BA0_DMR_TR_VERIFY	(0<<2)	/* Verify Transfer */
 147#define BA0_DMR_TR_WRITE	(1<<2)	/* Write Transfer */
 148#define BA0_DMR_TR_READ		(2<<2)	/* Read Transfer */
 149
 150#define BA0_DCR_HTCIE		(1<<17)	/* Half Terminal Count Interrupt */
 151#define BA0_DCR_TCIE		(1<<16)	/* Terminal Count Interrupt */
 152#define BA0_DCR_MSK		(1<<0)	/* DMA Mask bit */
 153
 154#define BA0_FCR0		0x0180	/* FIFO Control 0 */
 155#define BA0_FCR1		0x0184	/* FIFO Control 1 */
 156#define BA0_FCR2		0x0188	/* FIFO Control 2 */
 157#define BA0_FCR3		0x018c	/* FIFO Control 3 */
 158
 159#define BA0_FCR_FEN		(1<<31)	/* FIFO Enable bit */
 160#define BA0_FCR_DACZ		(1<<30)	/* DAC Zero */
 161#define BA0_FCR_PSH		(1<<29)	/* Previous Sample Hold */
 162#define BA0_FCR_RS(x)		(((x)&0x1f)<<24) /* Right Slot Mapping */
 163#define BA0_FCR_LS(x)		(((x)&0x1f)<<16) /* Left Slot Mapping */
 164#define BA0_FCR_SZ(x)		(((x)&0x7f)<<8)	/* FIFO buffer size (in samples) */
 165#define BA0_FCR_OF(x)		(((x)&0x7f)<<0)	/* FIFO starting offset (in samples) */
 166
 167#define BA0_FPDR0		0x0190	/* FIFO Polled Data 0 */
 168#define BA0_FPDR1		0x0194	/* FIFO Polled Data 1 */
 169#define BA0_FPDR2		0x0198	/* FIFO Polled Data 2 */
 170#define BA0_FPDR3		0x019c	/* FIFO Polled Data 3 */
 171
 172#define BA0_FCHS		0x020c	/* FIFO Channel Status */
 173#define BA0_FCHS_RCO(x)		(1<<(7+(((x)&3)<<3))) /* Right Channel Out */
 174#define BA0_FCHS_LCO(x)		(1<<(6+(((x)&3)<<3))) /* Left Channel Out */
 175#define BA0_FCHS_MRP(x)		(1<<(5+(((x)&3)<<3))) /* Move Read Pointer */
 176#define BA0_FCHS_FE(x)		(1<<(4+(((x)&3)<<3))) /* FIFO Empty */
 177#define BA0_FCHS_FF(x)		(1<<(3+(((x)&3)<<3))) /* FIFO Full */
 178#define BA0_FCHS_IOR(x)		(1<<(2+(((x)&3)<<3))) /* Internal Overrun Flag */
 179#define BA0_FCHS_RCI(x)		(1<<(1+(((x)&3)<<3))) /* Right Channel In */
 180#define BA0_FCHS_LCI(x)		(1<<(0+(((x)&3)<<3))) /* Left Channel In */
 181
 182#define BA0_FSIC0		0x0210	/* FIFO Status and Interrupt Control 0 */
 183#define BA0_FSIC1		0x0214	/* FIFO Status and Interrupt Control 1 */
 184#define BA0_FSIC2		0x0218	/* FIFO Status and Interrupt Control 2 */
 185#define BA0_FSIC3		0x021c	/* FIFO Status and Interrupt Control 3 */
 186
 187#define BA0_FSIC_FIC(x)		(((x)&0x7f)<<24) /* FIFO Interrupt Count */
 188#define BA0_FSIC_FORIE		(1<<23) /* FIFO OverRun Interrupt Enable */
 189#define BA0_FSIC_FURIE		(1<<22) /* FIFO UnderRun Interrupt Enable */
 190#define BA0_FSIC_FSCIE		(1<<16)	/* FIFO Sample Count Interrupt Enable */
 191#define BA0_FSIC_FSC(x)		(((x)&0x7f)<<8) /* FIFO Sample Count */
 192#define BA0_FSIC_FOR		(1<<7)	/* FIFO OverRun */
 193#define BA0_FSIC_FUR		(1<<6)	/* FIFO UnderRun */
 194#define BA0_FSIC_FSCR		(1<<0)	/* FIFO Sample Count Reached */
 195
 196#define BA0_PMCS		0x0344	/* Power Management Control/Status */
 197#define BA0_CWPR		0x03e0	/* Configuration Write Protect */
 198
 199#define BA0_EPPMC		0x03e4	/* Extended PCI Power Management Control */
 200#define BA0_EPPMC_FPDN		(1<<14) /* Full Power DowN */
 201
 202#define BA0_GPIOR		0x03e8	/* GPIO Pin Interface Register */
 203
 204#define BA0_SPMC		0x03ec	/* Serial Port Power Management Control (& ASDIN2 enable) */
 205#define BA0_SPMC_GIPPEN		(1<<15)	/* GP INT Primary PME# Enable */
 206#define BA0_SPMC_GISPEN		(1<<14)	/* GP INT Secondary PME# Enable */
 207#define BA0_SPMC_EESPD		(1<<9)	/* EEPROM Serial Port Disable */
 208#define BA0_SPMC_ASDI2E		(1<<8)	/* ASDIN2 Enable */
 209#define BA0_SPMC_ASDO		(1<<7)	/* Asynchronous ASDOUT Assertion */
 210#define BA0_SPMC_WUP2		(1<<3)	/* Wakeup for Secondary Input */
 211#define BA0_SPMC_WUP1		(1<<2)	/* Wakeup for Primary Input */
 212#define BA0_SPMC_ASYNC		(1<<1)	/* Asynchronous ASYNC Assertion */
 213#define BA0_SPMC_RSTN		(1<<0)	/* Reset Not! */
 214
 215#define BA0_CFLR		0x03f0	/* Configuration Load Register (EEPROM or BIOS) */
 216#define BA0_CFLR_DEFAULT	0x00000001 /* CFLR must be in AC97 link mode */
 217#define BA0_IISR		0x03f4	/* ISA Interrupt Select */
 218#define BA0_TMS			0x03f8	/* Test Register */
 219#define BA0_SSVID		0x03fc	/* Subsystem ID register */
 220
 221#define BA0_CLKCR1		0x0400	/* Clock Control Register 1 */
 222#define BA0_CLKCR1_CLKON	(1<<25)	/* Read Only */
 223#define BA0_CLKCR1_DLLRDY	(1<<24)	/* DLL Ready */
 224#define BA0_CLKCR1_DLLOS	(1<<6)	/* DLL Output Select */
 225#define BA0_CLKCR1_SWCE		(1<<5)	/* Clock Enable */
 226#define BA0_CLKCR1_DLLP		(1<<4)	/* DLL PowerUp */
 227#define BA0_CLKCR1_DLLSS	(((x)&3)<<3) /* DLL Source Select */
 228
 229#define BA0_FRR			0x0410	/* Feature Reporting Register */
 230#define BA0_SLT12O		0x041c	/* Slot 12 GPIO Output Register for AC-Link */
 231
 232#define BA0_SERMC		0x0420	/* Serial Port Master Control */
 233#define BA0_SERMC_FCRN		(1<<27)	/* Force Codec Ready Not */
 234#define BA0_SERMC_ODSEN2	(1<<25)	/* On-Demand Support Enable ASDIN2 */
 235#define BA0_SERMC_ODSEN1	(1<<24)	/* On-Demand Support Enable ASDIN1 */
 236#define BA0_SERMC_SXLB		(1<<21)	/* ASDIN2 to ASDOUT Loopback */
 237#define BA0_SERMC_SLB		(1<<20)	/* ASDOUT to ASDIN2 Loopback */
 238#define BA0_SERMC_LOVF		(1<<19)	/* Loopback Output Valid Frame bit */
 239#define BA0_SERMC_TCID(x)	(((x)&3)<<16) /* Target Secondary Codec ID */
 240#define BA0_SERMC_PXLB		(5<<1)	/* Primary Port External Loopback */
 241#define BA0_SERMC_PLB		(4<<1)	/* Primary Port Internal Loopback */
 242#define BA0_SERMC_PTC		(7<<1)	/* Port Timing Configuration */
 243#define BA0_SERMC_PTC_AC97	(1<<1)	/* AC97 mode */
 244#define BA0_SERMC_MSPE		(1<<0)	/* Master Serial Port Enable */
 245
 246#define BA0_SERC1		0x0428	/* Serial Port Configuration 1 */
 247#define BA0_SERC1_SO1F(x)	(((x)&7)>>1) /* Primary Output Port Format */
 248#define BA0_SERC1_AC97		(1<<1)
 249#define BA0_SERC1_SO1EN		(1<<0)	/* Primary Output Port Enable */
 250
 251#define BA0_SERC2		0x042c	/* Serial Port Configuration 2 */
 252#define BA0_SERC2_SI1F(x)	(((x)&7)>>1) /* Primary Input Port Format */
 253#define BA0_SERC2_AC97		(1<<1)
 254#define BA0_SERC2_SI1EN		(1<<0)	/* Primary Input Port Enable */
 255
 256#define BA0_SLT12M		0x045c	/* Slot 12 Monitor Register for Primary AC-Link */
 257
 258#define BA0_ACCTL		0x0460	/* AC'97 Control */
 259#define BA0_ACCTL_TC		(1<<6)	/* Target Codec */
 260#define BA0_ACCTL_CRW		(1<<4)	/* 0=Write, 1=Read Command */
 261#define BA0_ACCTL_DCV		(1<<3)	/* Dynamic Command Valid */
 262#define BA0_ACCTL_VFRM		(1<<2)	/* Valid Frame */
 263#define BA0_ACCTL_ESYN		(1<<1)	/* Enable Sync */
 264
 265#define BA0_ACSTS		0x0464	/* AC'97 Status */
 266#define BA0_ACSTS_VSTS		(1<<1)	/* Valid Status */
 267#define BA0_ACSTS_CRDY		(1<<0)	/* Codec Ready */
 268
 269#define BA0_ACOSV		0x0468	/* AC'97 Output Slot Valid */
 270#define BA0_ACOSV_SLV(x)	(1<<((x)-3))
 271
 272#define BA0_ACCAD		0x046c	/* AC'97 Command Address */
 273#define BA0_ACCDA		0x0470	/* AC'97 Command Data */
 274
 275#define BA0_ACISV		0x0474	/* AC'97 Input Slot Valid */
 276#define BA0_ACISV_SLV(x)	(1<<((x)-3))
 277
 278#define BA0_ACSAD		0x0478	/* AC'97 Status Address */
 279#define BA0_ACSDA		0x047c	/* AC'97 Status Data */
 280#define BA0_JSPT		0x0480	/* Joystick poll/trigger */
 281#define BA0_JSCTL		0x0484	/* Joystick control */
 282#define BA0_JSC1		0x0488	/* Joystick control */
 283#define BA0_JSC2		0x048c	/* Joystick control */
 284#define BA0_JSIO		0x04a0
 285
 286#define BA0_MIDCR		0x0490	/* MIDI Control */
 287#define BA0_MIDCR_MRST		(1<<5)	/* Reset MIDI Interface */
 288#define BA0_MIDCR_MLB		(1<<4)	/* MIDI Loop Back Enable */
 289#define BA0_MIDCR_TIE		(1<<3)	/* MIDI Transmuit Interrupt Enable */
 290#define BA0_MIDCR_RIE		(1<<2)	/* MIDI Receive Interrupt Enable */
 291#define BA0_MIDCR_RXE		(1<<1)	/* MIDI Receive Enable */
 292#define BA0_MIDCR_TXE		(1<<0)	/* MIDI Transmit Enable */
 293
 294#define BA0_MIDCMD		0x0494	/* MIDI Command (wo) */
 295
 296#define BA0_MIDSR		0x0494	/* MIDI Status (ro) */
 297#define BA0_MIDSR_RDA		(1<<15)	/* Sticky bit (RBE 1->0) */
 298#define BA0_MIDSR_TBE		(1<<14) /* Sticky bit (TBF 0->1) */
 299#define BA0_MIDSR_RBE		(1<<7)	/* Receive Buffer Empty */
 300#define BA0_MIDSR_TBF		(1<<6)	/* Transmit Buffer Full */
 301
 302#define BA0_MIDWP		0x0498	/* MIDI Write */
 303#define BA0_MIDRP		0x049c	/* MIDI Read (ro) */
 304
 305#define BA0_AODSD1		0x04a8	/* AC'97 On-Demand Slot Disable for primary link (ro) */
 306#define BA0_AODSD1_NDS(x)	(1<<((x)-3))
 307
 308#define BA0_AODSD2		0x04ac	/* AC'97 On-Demand Slot Disable for secondary link (ro) */
 309#define BA0_AODSD2_NDS(x)	(1<<((x)-3))
 310
 311#define BA0_CFGI		0x04b0	/* Configure Interface (EEPROM interface) */
 312#define BA0_SLT12M2		0x04dc	/* Slot 12 Monitor Register 2 for secondary AC-link */
 313#define BA0_ACSTS2		0x04e4	/* AC'97 Status Register 2 */
 314#define BA0_ACISV2		0x04f4	/* AC'97 Input Slot Valid Register 2 */
 315#define BA0_ACSAD2		0x04f8	/* AC'97 Status Address Register 2 */
 316#define BA0_ACSDA2		0x04fc	/* AC'97 Status Data Register 2 */
 317#define BA0_FMSR		0x0730	/* FM Synthesis Status (ro) */
 318#define BA0_B0AP		0x0730	/* FM Bank 0 Address Port (wo) */
 319#define BA0_FMDP		0x0734	/* FM Data Port */
 320#define BA0_B1AP		0x0738	/* FM Bank 1 Address Port */
 321#define BA0_B1DP		0x073c	/* FM Bank 1 Data Port */
 322
 323#define BA0_SSPM		0x0740	/* Sound System Power Management */
 324#define BA0_SSPM_MIXEN		(1<<6)	/* Playback SRC + FM/Wavetable MIX */
 325#define BA0_SSPM_CSRCEN		(1<<5)	/* Capture Sample Rate Converter Enable */
 326#define BA0_SSPM_PSRCEN		(1<<4)	/* Playback Sample Rate Converter Enable */
 327#define BA0_SSPM_JSEN		(1<<3)	/* Joystick Enable */
 328#define BA0_SSPM_ACLEN		(1<<2)	/* Serial Port Engine and AC-Link Enable */
 329#define BA0_SSPM_FMEN		(1<<1)	/* FM Synthesis Block Enable */
 330
 331#define BA0_DACSR		0x0744	/* DAC Sample Rate - Playback SRC */
 332#define BA0_ADCSR		0x0748	/* ADC Sample Rate - Capture SRC */
 333
 334#define BA0_SSCR		0x074c	/* Sound System Control Register */
 335#define BA0_SSCR_HVS1		(1<<23)	/* Hardwave Volume Step (0=1,1=2) */
 336#define BA0_SSCR_MVCS		(1<<19)	/* Master Volume Codec Select */
 337#define BA0_SSCR_MVLD		(1<<18)	/* Master Volume Line Out Disable */
 338#define BA0_SSCR_MVAD		(1<<17)	/* Master Volume Alternate Out Disable */
 339#define BA0_SSCR_MVMD		(1<<16)	/* Master Volume Mono Out Disable */
 340#define BA0_SSCR_XLPSRC		(1<<8)	/* External SRC Loopback Mode */
 341#define BA0_SSCR_LPSRC		(1<<7)	/* SRC Loopback Mode */
 342#define BA0_SSCR_CDTX		(1<<5)	/* CD Transfer Data */
 343#define BA0_SSCR_HVC		(1<<3)	/* Harware Volume Control Enable */
 344
 345#define BA0_FMLVC		0x0754	/* FM Synthesis Left Volume Control */
 346#define BA0_FMRVC		0x0758	/* FM Synthesis Right Volume Control */
 347#define BA0_SRCSA		0x075c	/* SRC Slot Assignments */
 348#define BA0_PPLVC		0x0760	/* PCM Playback Left Volume Control */
 349#define BA0_PPRVC		0x0764	/* PCM Playback Right Volume Control */
 350#define BA0_PASR		0x0768	/* playback sample rate */
 351#define BA0_CASR		0x076C	/* capture sample rate */
 352
 353/* Source Slot Numbers - Playback */
 354#define SRCSLOT_LEFT_PCM_PLAYBACK		0
 355#define SRCSLOT_RIGHT_PCM_PLAYBACK		1
 356#define SRCSLOT_PHONE_LINE_1_DAC		2
 357#define SRCSLOT_CENTER_PCM_PLAYBACK		3
 358#define SRCSLOT_LEFT_SURROUND_PCM_PLAYBACK	4
 359#define SRCSLOT_RIGHT_SURROUND_PCM_PLAYBACK	5
 360#define SRCSLOT_LFE_PCM_PLAYBACK		6
 361#define SRCSLOT_PHONE_LINE_2_DAC		7
 362#define SRCSLOT_HEADSET_DAC			8
 363#define SRCSLOT_LEFT_WT				29  /* invalid for BA0_SRCSA */
 364#define SRCSLOT_RIGHT_WT			30  /* invalid for BA0_SRCSA */
 365
 366/* Source Slot Numbers - Capture */
 367#define SRCSLOT_LEFT_PCM_RECORD			10
 368#define SRCSLOT_RIGHT_PCM_RECORD		11
 369#define SRCSLOT_PHONE_LINE_1_ADC		12
 370#define SRCSLOT_MIC_ADC				13
 371#define SRCSLOT_PHONE_LINE_2_ADC		17
 372#define SRCSLOT_HEADSET_ADC			18
 373#define SRCSLOT_SECONDARY_LEFT_PCM_RECORD	20
 374#define SRCSLOT_SECONDARY_RIGHT_PCM_RECORD	21
 375#define SRCSLOT_SECONDARY_PHONE_LINE_1_ADC	22
 376#define SRCSLOT_SECONDARY_MIC_ADC		23
 377#define SRCSLOT_SECONDARY_PHONE_LINE_2_ADC	27
 378#define SRCSLOT_SECONDARY_HEADSET_ADC		28
 379
 380/* Source Slot Numbers - Others */
 381#define SRCSLOT_POWER_DOWN			31
 382
 383/* MIDI modes */
 384#define CS4281_MODE_OUTPUT		(1<<0)
 385#define CS4281_MODE_INPUT		(1<<1)
 386
 387/* joystick bits */
 388/* Bits for JSPT */
 389#define JSPT_CAX                                0x00000001
 390#define JSPT_CAY                                0x00000002
 391#define JSPT_CBX                                0x00000004
 392#define JSPT_CBY                                0x00000008
 393#define JSPT_BA1                                0x00000010
 394#define JSPT_BA2                                0x00000020
 395#define JSPT_BB1                                0x00000040
 396#define JSPT_BB2                                0x00000080
 397
 398/* Bits for JSCTL */
 399#define JSCTL_SP_MASK                           0x00000003
 400#define JSCTL_SP_SLOW                           0x00000000
 401#define JSCTL_SP_MEDIUM_SLOW                    0x00000001
 402#define JSCTL_SP_MEDIUM_FAST                    0x00000002
 403#define JSCTL_SP_FAST                           0x00000003
 404#define JSCTL_ARE                               0x00000004
 405
 406/* Data register pairs masks */
 407#define JSC1_Y1V_MASK                           0x0000FFFF
 408#define JSC1_X1V_MASK                           0xFFFF0000
 409#define JSC1_Y1V_SHIFT                          0
 410#define JSC1_X1V_SHIFT                          16
 411#define JSC2_Y2V_MASK                           0x0000FFFF
 412#define JSC2_X2V_MASK                           0xFFFF0000
 413#define JSC2_Y2V_SHIFT                          0
 414#define JSC2_X2V_SHIFT                          16
 415
 416/* JS GPIO */
 417#define JSIO_DAX                                0x00000001
 418#define JSIO_DAY                                0x00000002
 419#define JSIO_DBX                                0x00000004
 420#define JSIO_DBY                                0x00000008
 421#define JSIO_AXOE                               0x00000010
 422#define JSIO_AYOE                               0x00000020
 423#define JSIO_BXOE                               0x00000040
 424#define JSIO_BYOE                               0x00000080
 425
 426/*
 427 *
 428 */
 429
 430struct cs4281_dma {
 431	struct snd_pcm_substream *substream;
 432	unsigned int regDBA;		/* offset to DBA register */
 433	unsigned int regDCA;		/* offset to DCA register */
 434	unsigned int regDBC;		/* offset to DBC register */
 435	unsigned int regDCC;		/* offset to DCC register */
 436	unsigned int regDMR;		/* offset to DMR register */
 437	unsigned int regDCR;		/* offset to DCR register */
 438	unsigned int regHDSR;		/* offset to HDSR register */
 439	unsigned int regFCR;		/* offset to FCR register */
 440	unsigned int regFSIC;		/* offset to FSIC register */
 441	unsigned int valDMR;		/* DMA mode */
 442	unsigned int valDCR;		/* DMA command */
 443	unsigned int valFCR;		/* FIFO control */
 444	unsigned int fifo_offset;	/* FIFO offset within BA1 */
 445	unsigned char left_slot;	/* FIFO left slot */
 446	unsigned char right_slot;	/* FIFO right slot */
 447	int frag;			/* period number */
 448};
 449
 450#define SUSPEND_REGISTERS	20
 451
 452struct cs4281 {
 453	int irq;
 454
 455	void __iomem *ba0;		/* virtual (accessible) address */
 456	void __iomem *ba1;		/* virtual (accessible) address */
 457	unsigned long ba0_addr;
 458	unsigned long ba1_addr;
 459
 460	int dual_codec;
 461
 462	struct snd_ac97_bus *ac97_bus;
 463	struct snd_ac97 *ac97;
 464	struct snd_ac97 *ac97_secondary;
 465
 466	struct pci_dev *pci;
 467	struct snd_card *card;
 468	struct snd_pcm *pcm;
 469	struct snd_rawmidi *rmidi;
 470	struct snd_rawmidi_substream *midi_input;
 471	struct snd_rawmidi_substream *midi_output;
 472
 473	struct cs4281_dma dma[4];
 474
 475	unsigned char src_left_play_slot;
 476	unsigned char src_right_play_slot;
 477	unsigned char src_left_rec_slot;
 478	unsigned char src_right_rec_slot;
 479
 480	unsigned int spurious_dhtc_irq;
 481	unsigned int spurious_dtc_irq;
 482
 483	spinlock_t reg_lock;
 484	unsigned int midcr;
 485	unsigned int uartm;
 486
 487	struct gameport *gameport;
 488
 489#ifdef CONFIG_PM_SLEEP
 490	u32 suspend_regs[SUSPEND_REGISTERS];
 491#endif
 492
 493};
 494
 495static irqreturn_t snd_cs4281_interrupt(int irq, void *dev_id);
 496
 497static DEFINE_PCI_DEVICE_TABLE(snd_cs4281_ids) = {
 498	{ PCI_VDEVICE(CIRRUS, 0x6005), 0, },	/* CS4281 */
 499	{ 0, }
 500};
 501
 502MODULE_DEVICE_TABLE(pci, snd_cs4281_ids);
 503
 504/*
 505 *  constants
 506 */
 507
 508#define CS4281_FIFO_SIZE	32
 509
 510/*
 511 *  common I/O routines
 512 */
 513
 514static inline void snd_cs4281_pokeBA0(struct cs4281 *chip, unsigned long offset,
 515				      unsigned int val)
 516{
 517        writel(val, chip->ba0 + offset);
 518}
 519
 520static inline unsigned int snd_cs4281_peekBA0(struct cs4281 *chip, unsigned long offset)
 521{
 522        return readl(chip->ba0 + offset);
 523}
 524
 525static void snd_cs4281_ac97_write(struct snd_ac97 *ac97,
 526				  unsigned short reg, unsigned short val)
 527{
 528	/*
 529	 *  1. Write ACCAD = Command Address Register = 46Ch for AC97 register address
 530	 *  2. Write ACCDA = Command Data Register = 470h    for data to write to AC97
 531	 *  3. Write ACCTL = Control Register = 460h for initiating the write
 532	 *  4. Read ACCTL = 460h, DCV should be reset by now and 460h = 07h
 533	 *  5. if DCV not cleared, break and return error
 534	 */
 535	struct cs4281 *chip = ac97->private_data;
 536	int count;
 537
 538	/*
 539	 *  Setup the AC97 control registers on the CS461x to send the
 540	 *  appropriate command to the AC97 to perform the read.
 541	 *  ACCAD = Command Address Register = 46Ch
 542	 *  ACCDA = Command Data Register = 470h
 543	 *  ACCTL = Control Register = 460h
 544	 *  set DCV - will clear when process completed
 545	 *  reset CRW - Write command
 546	 *  set VFRM - valid frame enabled
 547	 *  set ESYN - ASYNC generation enabled
 548	 *  set RSTN - ARST# inactive, AC97 codec not reset
 549         */
 550	snd_cs4281_pokeBA0(chip, BA0_ACCAD, reg);
 551	snd_cs4281_pokeBA0(chip, BA0_ACCDA, val);
 552	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_DCV | BA0_ACCTL_VFRM |
 553				            BA0_ACCTL_ESYN | (ac97->num ? BA0_ACCTL_TC : 0));
 554	for (count = 0; count < 2000; count++) {
 555		/*
 556		 *  First, we want to wait for a short time.
 557		 */
 558		udelay(10);
 559		/*
 560		 *  Now, check to see if the write has completed.
 561		 *  ACCTL = 460h, DCV should be reset by now and 460h = 07h
 562		 */
 563		if (!(snd_cs4281_peekBA0(chip, BA0_ACCTL) & BA0_ACCTL_DCV)) {
 564			return;
 565		}
 566	}
 567	dev_err(chip->card->dev,
 568		"AC'97 write problem, reg = 0x%x, val = 0x%x\n", reg, val);
 569}
 570
 571static unsigned short snd_cs4281_ac97_read(struct snd_ac97 *ac97,
 572					   unsigned short reg)
 573{
 574	struct cs4281 *chip = ac97->private_data;
 575	int count;
 576	unsigned short result;
 577	// FIXME: volatile is necessary in the following due to a bug of
 578	// some gcc versions
 579	volatile int ac97_num = ((volatile struct snd_ac97 *)ac97)->num;
 580
 581	/*
 582	 *  1. Write ACCAD = Command Address Register = 46Ch for AC97 register address
 583	 *  2. Write ACCDA = Command Data Register = 470h    for data to write to AC97 
 584	 *  3. Write ACCTL = Control Register = 460h for initiating the write
 585	 *  4. Read ACCTL = 460h, DCV should be reset by now and 460h = 17h
 586	 *  5. if DCV not cleared, break and return error
 587	 *  6. Read ACSTS = Status Register = 464h, check VSTS bit
 588	 */
 589
 590	snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSDA2 : BA0_ACSDA);
 591
 592	/*
 593	 *  Setup the AC97 control registers on the CS461x to send the
 594	 *  appropriate command to the AC97 to perform the read.
 595	 *  ACCAD = Command Address Register = 46Ch
 596	 *  ACCDA = Command Data Register = 470h
 597	 *  ACCTL = Control Register = 460h
 598	 *  set DCV - will clear when process completed
 599	 *  set CRW - Read command
 600	 *  set VFRM - valid frame enabled
 601	 *  set ESYN - ASYNC generation enabled
 602	 *  set RSTN - ARST# inactive, AC97 codec not reset
 603	 */
 604
 605	snd_cs4281_pokeBA0(chip, BA0_ACCAD, reg);
 606	snd_cs4281_pokeBA0(chip, BA0_ACCDA, 0);
 607	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_DCV | BA0_ACCTL_CRW |
 608					    BA0_ACCTL_VFRM | BA0_ACCTL_ESYN |
 609			   (ac97_num ? BA0_ACCTL_TC : 0));
 610
 611
 612	/*
 613	 *  Wait for the read to occur.
 614	 */
 615	for (count = 0; count < 500; count++) {
 616		/*
 617		 *  First, we want to wait for a short time.
 618	 	 */
 619		udelay(10);
 620		/*
 621		 *  Now, check to see if the read has completed.
 622		 *  ACCTL = 460h, DCV should be reset by now and 460h = 17h
 623		 */
 624		if (!(snd_cs4281_peekBA0(chip, BA0_ACCTL) & BA0_ACCTL_DCV))
 625			goto __ok1;
 626	}
 627
 628	dev_err(chip->card->dev,
 629		"AC'97 read problem (ACCTL_DCV), reg = 0x%x\n", reg);
 630	result = 0xffff;
 631	goto __end;
 632	
 633      __ok1:
 634	/*
 635	 *  Wait for the valid status bit to go active.
 636	 */
 637	for (count = 0; count < 100; count++) {
 638		/*
 639		 *  Read the AC97 status register.
 640		 *  ACSTS = Status Register = 464h
 641		 *  VSTS - Valid Status
 642		 */
 643		if (snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSTS2 : BA0_ACSTS) & BA0_ACSTS_VSTS)
 644			goto __ok2;
 645		udelay(10);
 646	}
 647	
 648	dev_err(chip->card->dev,
 649		"AC'97 read problem (ACSTS_VSTS), reg = 0x%x\n", reg);
 650	result = 0xffff;
 651	goto __end;
 652
 653      __ok2:
 654	/*
 655	 *  Read the data returned from the AC97 register.
 656	 *  ACSDA = Status Data Register = 474h
 657	 */
 658	result = snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSDA2 : BA0_ACSDA);
 659
 660      __end:
 661	return result;
 662}
 663
 664/*
 665 *  PCM part
 666 */
 667
 668static int snd_cs4281_trigger(struct snd_pcm_substream *substream, int cmd)
 669{
 670	struct cs4281_dma *dma = substream->runtime->private_data;
 671	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 672
 673	spin_lock(&chip->reg_lock);
 674	switch (cmd) {
 675	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 676		dma->valDCR |= BA0_DCR_MSK;
 677		dma->valFCR |= BA0_FCR_FEN;
 678		break;
 679	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 680		dma->valDCR &= ~BA0_DCR_MSK;
 681		dma->valFCR &= ~BA0_FCR_FEN;
 682		break;
 683	case SNDRV_PCM_TRIGGER_START:
 684	case SNDRV_PCM_TRIGGER_RESUME:
 685		snd_cs4281_pokeBA0(chip, dma->regDMR, dma->valDMR & ~BA0_DMR_DMA);
 686		dma->valDMR |= BA0_DMR_DMA;
 687		dma->valDCR &= ~BA0_DCR_MSK;
 688		dma->valFCR |= BA0_FCR_FEN;
 689		break;
 690	case SNDRV_PCM_TRIGGER_STOP:
 691	case SNDRV_PCM_TRIGGER_SUSPEND:
 692		dma->valDMR &= ~(BA0_DMR_DMA|BA0_DMR_POLL);
 693		dma->valDCR |= BA0_DCR_MSK;
 694		dma->valFCR &= ~BA0_FCR_FEN;
 695		/* Leave wave playback FIFO enabled for FM */
 696		if (dma->regFCR != BA0_FCR0)
 697			dma->valFCR &= ~BA0_FCR_FEN;
 698		break;
 699	default:
 700		spin_unlock(&chip->reg_lock);
 701		return -EINVAL;
 702	}
 703	snd_cs4281_pokeBA0(chip, dma->regDMR, dma->valDMR);
 704	snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR);
 705	snd_cs4281_pokeBA0(chip, dma->regDCR, dma->valDCR);
 706	spin_unlock(&chip->reg_lock);
 707	return 0;
 708}
 709
 710static unsigned int snd_cs4281_rate(unsigned int rate, unsigned int *real_rate)
 711{
 712	unsigned int val = ~0;
 713	
 714	if (real_rate)
 715		*real_rate = rate;
 716	/* special "hardcoded" rates */
 717	switch (rate) {
 718	case 8000:	return 5;
 719	case 11025:	return 4;
 720	case 16000:	return 3;
 721	case 22050:	return 2;
 722	case 44100:	return 1;
 723	case 48000:	return 0;
 724	default:
 725		goto __variable;
 726	}
 727      __variable:
 728	val = 1536000 / rate;
 729	if (real_rate)
 730		*real_rate = 1536000 / val;
 731	return val;
 732}
 733
 734static void snd_cs4281_mode(struct cs4281 *chip, struct cs4281_dma *dma,
 735			    struct snd_pcm_runtime *runtime,
 736			    int capture, int src)
 737{
 738	int rec_mono;
 739
 740	dma->valDMR = BA0_DMR_TYPE_SINGLE | BA0_DMR_AUTO |
 741		      (capture ? BA0_DMR_TR_WRITE : BA0_DMR_TR_READ);
 742	if (runtime->channels == 1)
 743		dma->valDMR |= BA0_DMR_MONO;
 744	if (snd_pcm_format_unsigned(runtime->format) > 0)
 745		dma->valDMR |= BA0_DMR_USIGN;
 746	if (snd_pcm_format_big_endian(runtime->format) > 0)
 747		dma->valDMR |= BA0_DMR_BEND;
 748	switch (snd_pcm_format_width(runtime->format)) {
 749	case 8: dma->valDMR |= BA0_DMR_SIZE8;
 750		if (runtime->channels == 1)
 751			dma->valDMR |= BA0_DMR_SWAPC;
 752		break;
 753	case 32: dma->valDMR |= BA0_DMR_SIZE20; break;
 754	}
 755	dma->frag = 0;	/* for workaround */
 756	dma->valDCR = BA0_DCR_TCIE | BA0_DCR_MSK;
 757	if (runtime->buffer_size != runtime->period_size)
 758		dma->valDCR |= BA0_DCR_HTCIE;
 759	/* Initialize DMA */
 760	snd_cs4281_pokeBA0(chip, dma->regDBA, runtime->dma_addr);
 761	snd_cs4281_pokeBA0(chip, dma->regDBC, runtime->buffer_size - 1);
 762	rec_mono = (chip->dma[1].valDMR & BA0_DMR_MONO) == BA0_DMR_MONO;
 763	snd_cs4281_pokeBA0(chip, BA0_SRCSA, (chip->src_left_play_slot << 0) |
 764					    (chip->src_right_play_slot << 8) |
 765					    (chip->src_left_rec_slot << 16) |
 766					    ((rec_mono ? 31 : chip->src_right_rec_slot) << 24));
 767	if (!src)
 768		goto __skip_src;
 769	if (!capture) {
 770		if (dma->left_slot == chip->src_left_play_slot) {
 771			unsigned int val = snd_cs4281_rate(runtime->rate, NULL);
 772			snd_BUG_ON(dma->right_slot != chip->src_right_play_slot);
 773			snd_cs4281_pokeBA0(chip, BA0_DACSR, val);
 774		}
 775	} else {
 776		if (dma->left_slot == chip->src_left_rec_slot) {
 777			unsigned int val = snd_cs4281_rate(runtime->rate, NULL);
 778			snd_BUG_ON(dma->right_slot != chip->src_right_rec_slot);
 779			snd_cs4281_pokeBA0(chip, BA0_ADCSR, val);
 780		}
 781	}
 782      __skip_src:
 783	/* Deactivate wave playback FIFO before changing slot assignments */
 784	if (dma->regFCR == BA0_FCR0)
 785		snd_cs4281_pokeBA0(chip, dma->regFCR, snd_cs4281_peekBA0(chip, dma->regFCR) & ~BA0_FCR_FEN);
 786	/* Initialize FIFO */
 787	dma->valFCR = BA0_FCR_LS(dma->left_slot) |
 788		      BA0_FCR_RS(capture && (dma->valDMR & BA0_DMR_MONO) ? 31 : dma->right_slot) |
 789		      BA0_FCR_SZ(CS4281_FIFO_SIZE) |
 790		      BA0_FCR_OF(dma->fifo_offset);
 791	snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR | (capture ? BA0_FCR_PSH : 0));
 792	/* Activate FIFO again for FM playback */
 793	if (dma->regFCR == BA0_FCR0)
 794		snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR | BA0_FCR_FEN);
 795	/* Clear FIFO Status and Interrupt Control Register */
 796	snd_cs4281_pokeBA0(chip, dma->regFSIC, 0);
 797}
 798
 799static int snd_cs4281_hw_params(struct snd_pcm_substream *substream,
 800				struct snd_pcm_hw_params *hw_params)
 801{
 802	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 803}
 804
 805static int snd_cs4281_hw_free(struct snd_pcm_substream *substream)
 806{
 807	return snd_pcm_lib_free_pages(substream);
 808}
 809
 810static int snd_cs4281_playback_prepare(struct snd_pcm_substream *substream)
 811{
 812	struct snd_pcm_runtime *runtime = substream->runtime;
 813	struct cs4281_dma *dma = runtime->private_data;
 814	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 815
 816	spin_lock_irq(&chip->reg_lock);
 817	snd_cs4281_mode(chip, dma, runtime, 0, 1);
 818	spin_unlock_irq(&chip->reg_lock);
 819	return 0;
 820}
 821
 822static int snd_cs4281_capture_prepare(struct snd_pcm_substream *substream)
 823{
 824	struct snd_pcm_runtime *runtime = substream->runtime;
 825	struct cs4281_dma *dma = runtime->private_data;
 826	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 827
 828	spin_lock_irq(&chip->reg_lock);
 829	snd_cs4281_mode(chip, dma, runtime, 1, 1);
 830	spin_unlock_irq(&chip->reg_lock);
 831	return 0;
 832}
 833
 834static snd_pcm_uframes_t snd_cs4281_pointer(struct snd_pcm_substream *substream)
 835{
 836	struct snd_pcm_runtime *runtime = substream->runtime;
 837	struct cs4281_dma *dma = runtime->private_data;
 838	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 839
 840	/*
 841	dev_dbg(chip->card->dev,
 842		"DCC = 0x%x, buffer_size = 0x%x, jiffies = %li\n",
 843		snd_cs4281_peekBA0(chip, dma->regDCC), runtime->buffer_size,
 844	       jiffies);
 845	*/
 846	return runtime->buffer_size -
 847	       snd_cs4281_peekBA0(chip, dma->regDCC) - 1;
 848}
 849
 850static struct snd_pcm_hardware snd_cs4281_playback =
 851{
 852	.info =			SNDRV_PCM_INFO_MMAP |
 853				SNDRV_PCM_INFO_INTERLEAVED |
 854				SNDRV_PCM_INFO_MMAP_VALID |
 855				SNDRV_PCM_INFO_PAUSE |
 856				SNDRV_PCM_INFO_RESUME,
 857	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
 858				SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
 859				SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
 860				SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
 861				SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE,
 862	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 863	.rate_min =		4000,
 864	.rate_max =		48000,
 865	.channels_min =		1,
 866	.channels_max =		2,
 867	.buffer_bytes_max =	(512*1024),
 868	.period_bytes_min =	64,
 869	.period_bytes_max =	(512*1024),
 870	.periods_min =		1,
 871	.periods_max =		2,
 872	.fifo_size =		CS4281_FIFO_SIZE,
 873};
 874
 875static struct snd_pcm_hardware snd_cs4281_capture =
 876{
 877	.info =			SNDRV_PCM_INFO_MMAP |
 878				SNDRV_PCM_INFO_INTERLEAVED |
 879				SNDRV_PCM_INFO_MMAP_VALID |
 880				SNDRV_PCM_INFO_PAUSE |
 881				SNDRV_PCM_INFO_RESUME,
 882	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
 883				SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
 884				SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
 885				SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
 886				SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE,
 887	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 888	.rate_min =		4000,
 889	.rate_max =		48000,
 890	.channels_min =		1,
 891	.channels_max =		2,
 892	.buffer_bytes_max =	(512*1024),
 893	.period_bytes_min =	64,
 894	.period_bytes_max =	(512*1024),
 895	.periods_min =		1,
 896	.periods_max =		2,
 897	.fifo_size =		CS4281_FIFO_SIZE,
 898};
 899
 900static int snd_cs4281_playback_open(struct snd_pcm_substream *substream)
 901{
 902	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 903	struct snd_pcm_runtime *runtime = substream->runtime;
 904	struct cs4281_dma *dma;
 905
 906	dma = &chip->dma[0];
 907	dma->substream = substream;
 908	dma->left_slot = 0;
 909	dma->right_slot = 1;
 910	runtime->private_data = dma;
 911	runtime->hw = snd_cs4281_playback;
 912	/* should be detected from the AC'97 layer, but it seems
 913	   that although CS4297A rev B reports 18-bit ADC resolution,
 914	   samples are 20-bit */
 915	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 20);
 916	return 0;
 917}
 918
 919static int snd_cs4281_capture_open(struct snd_pcm_substream *substream)
 920{
 921	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 922	struct snd_pcm_runtime *runtime = substream->runtime;
 923	struct cs4281_dma *dma;
 924
 925	dma = &chip->dma[1];
 926	dma->substream = substream;
 927	dma->left_slot = 10;
 928	dma->right_slot = 11;
 929	runtime->private_data = dma;
 930	runtime->hw = snd_cs4281_capture;
 931	/* should be detected from the AC'97 layer, but it seems
 932	   that although CS4297A rev B reports 18-bit ADC resolution,
 933	   samples are 20-bit */
 934	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 20);
 935	return 0;
 936}
 937
 938static int snd_cs4281_playback_close(struct snd_pcm_substream *substream)
 939{
 940	struct cs4281_dma *dma = substream->runtime->private_data;
 941
 942	dma->substream = NULL;
 943	return 0;
 944}
 945
 946static int snd_cs4281_capture_close(struct snd_pcm_substream *substream)
 947{
 948	struct cs4281_dma *dma = substream->runtime->private_data;
 949
 950	dma->substream = NULL;
 951	return 0;
 952}
 953
 954static struct snd_pcm_ops snd_cs4281_playback_ops = {
 955	.open =		snd_cs4281_playback_open,
 956	.close =	snd_cs4281_playback_close,
 957	.ioctl =	snd_pcm_lib_ioctl,
 958	.hw_params =	snd_cs4281_hw_params,
 959	.hw_free =	snd_cs4281_hw_free,
 960	.prepare =	snd_cs4281_playback_prepare,
 961	.trigger =	snd_cs4281_trigger,
 962	.pointer =	snd_cs4281_pointer,
 963};
 964
 965static struct snd_pcm_ops snd_cs4281_capture_ops = {
 966	.open =		snd_cs4281_capture_open,
 967	.close =	snd_cs4281_capture_close,
 968	.ioctl =	snd_pcm_lib_ioctl,
 969	.hw_params =	snd_cs4281_hw_params,
 970	.hw_free =	snd_cs4281_hw_free,
 971	.prepare =	snd_cs4281_capture_prepare,
 972	.trigger =	snd_cs4281_trigger,
 973	.pointer =	snd_cs4281_pointer,
 974};
 975
 976static int snd_cs4281_pcm(struct cs4281 *chip, int device,
 977			  struct snd_pcm **rpcm)
 978{
 979	struct snd_pcm *pcm;
 980	int err;
 981
 982	if (rpcm)
 983		*rpcm = NULL;
 984	err = snd_pcm_new(chip->card, "CS4281", device, 1, 1, &pcm);
 985	if (err < 0)
 986		return err;
 987
 988	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs4281_playback_ops);
 989	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs4281_capture_ops);
 990
 991	pcm->private_data = chip;
 992	pcm->info_flags = 0;
 993	strcpy(pcm->name, "CS4281");
 994	chip->pcm = pcm;
 995
 996	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 997					      snd_dma_pci_data(chip->pci), 64*1024, 512*1024);
 998
 999	if (rpcm)
1000		*rpcm = pcm;
1001	return 0;
1002}
1003
1004/*
1005 *  Mixer section
1006 */
1007
1008#define CS_VOL_MASK	0x1f
1009
1010static int snd_cs4281_info_volume(struct snd_kcontrol *kcontrol,
1011				  struct snd_ctl_elem_info *uinfo)
1012{
1013	uinfo->type              = SNDRV_CTL_ELEM_TYPE_INTEGER;
1014	uinfo->count             = 2;
1015	uinfo->value.integer.min = 0;
1016	uinfo->value.integer.max = CS_VOL_MASK;
1017	return 0;
1018}
1019 
1020static int snd_cs4281_get_volume(struct snd_kcontrol *kcontrol,
1021				 struct snd_ctl_elem_value *ucontrol)
1022{
1023	struct cs4281 *chip = snd_kcontrol_chip(kcontrol);
1024	int regL = (kcontrol->private_value >> 16) & 0xffff;
1025	int regR = kcontrol->private_value & 0xffff;
1026	int volL, volR;
1027
1028	volL = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regL) & CS_VOL_MASK);
1029	volR = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regR) & CS_VOL_MASK);
1030
1031	ucontrol->value.integer.value[0] = volL;
1032	ucontrol->value.integer.value[1] = volR;
1033	return 0;
1034}
1035
1036static int snd_cs4281_put_volume(struct snd_kcontrol *kcontrol,
1037				 struct snd_ctl_elem_value *ucontrol)
1038{
1039	struct cs4281 *chip = snd_kcontrol_chip(kcontrol);
1040	int change = 0;
1041	int regL = (kcontrol->private_value >> 16) & 0xffff;
1042	int regR = kcontrol->private_value & 0xffff;
1043	int volL, volR;
1044
1045	volL = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regL) & CS_VOL_MASK);
1046	volR = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regR) & CS_VOL_MASK);
1047
1048	if (ucontrol->value.integer.value[0] != volL) {
1049		volL = CS_VOL_MASK - (ucontrol->value.integer.value[0] & CS_VOL_MASK);
1050		snd_cs4281_pokeBA0(chip, regL, volL);
1051		change = 1;
1052	}
1053	if (ucontrol->value.integer.value[1] != volR) {
1054		volR = CS_VOL_MASK - (ucontrol->value.integer.value[1] & CS_VOL_MASK);
1055		snd_cs4281_pokeBA0(chip, regR, volR);
1056		change = 1;
1057	}
1058	return change;
1059}
1060
1061static const DECLARE_TLV_DB_SCALE(db_scale_dsp, -4650, 150, 0);
1062
1063static struct snd_kcontrol_new snd_cs4281_fm_vol = 
1064{
1065	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1066	.name = "Synth Playback Volume",
1067	.info = snd_cs4281_info_volume, 
1068	.get = snd_cs4281_get_volume,
1069	.put = snd_cs4281_put_volume, 
1070	.private_value = ((BA0_FMLVC << 16) | BA0_FMRVC),
1071	.tlv = { .p = db_scale_dsp },
1072};
1073
1074static struct snd_kcontrol_new snd_cs4281_pcm_vol = 
1075{
1076	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1077	.name = "PCM Stream Playback Volume",
1078	.info = snd_cs4281_info_volume, 
1079	.get = snd_cs4281_get_volume,
1080	.put = snd_cs4281_put_volume, 
1081	.private_value = ((BA0_PPLVC << 16) | BA0_PPRVC),
1082	.tlv = { .p = db_scale_dsp },
1083};
1084
1085static void snd_cs4281_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
1086{
1087	struct cs4281 *chip = bus->private_data;
1088	chip->ac97_bus = NULL;
1089}
1090
1091static void snd_cs4281_mixer_free_ac97(struct snd_ac97 *ac97)
1092{
1093	struct cs4281 *chip = ac97->private_data;
1094	if (ac97->num)
1095		chip->ac97_secondary = NULL;
1096	else
1097		chip->ac97 = NULL;
1098}
1099
1100static int snd_cs4281_mixer(struct cs4281 *chip)
1101{
1102	struct snd_card *card = chip->card;
1103	struct snd_ac97_template ac97;
1104	int err;
1105	static struct snd_ac97_bus_ops ops = {
1106		.write = snd_cs4281_ac97_write,
1107		.read = snd_cs4281_ac97_read,
1108	};
1109
1110	if ((err = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus)) < 0)
1111		return err;
1112	chip->ac97_bus->private_free = snd_cs4281_mixer_free_ac97_bus;
1113
1114	memset(&ac97, 0, sizeof(ac97));
1115	ac97.private_data = chip;
1116	ac97.private_free = snd_cs4281_mixer_free_ac97;
1117	if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
1118		return err;
1119	if (chip->dual_codec) {
1120		ac97.num = 1;
1121		if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97_secondary)) < 0)
1122			return err;
1123	}
1124	if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4281_fm_vol, chip))) < 0)
1125		return err;
1126	if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4281_pcm_vol, chip))) < 0)
1127		return err;
1128	return 0;
1129}
1130
1131
1132/*
1133 * proc interface
1134 */
1135
1136static void snd_cs4281_proc_read(struct snd_info_entry *entry, 
1137				  struct snd_info_buffer *buffer)
1138{
1139	struct cs4281 *chip = entry->private_data;
1140
1141	snd_iprintf(buffer, "Cirrus Logic CS4281\n\n");
1142	snd_iprintf(buffer, "Spurious half IRQs   : %u\n", chip->spurious_dhtc_irq);
1143	snd_iprintf(buffer, "Spurious end IRQs    : %u\n", chip->spurious_dtc_irq);
1144}
1145
1146static ssize_t snd_cs4281_BA0_read(struct snd_info_entry *entry,
1147				   void *file_private_data,
1148				   struct file *file, char __user *buf,
1149				   size_t count, loff_t pos)
1150{
1151	struct cs4281 *chip = entry->private_data;
1152	
1153	if (copy_to_user_fromio(buf, chip->ba0 + pos, count))
1154		return -EFAULT;
1155	return count;
1156}
1157
1158static ssize_t snd_cs4281_BA1_read(struct snd_info_entry *entry,
1159				   void *file_private_data,
1160				   struct file *file, char __user *buf,
1161				   size_t count, loff_t pos)
1162{
1163	struct cs4281 *chip = entry->private_data;
1164	
1165	if (copy_to_user_fromio(buf, chip->ba1 + pos, count))
1166		return -EFAULT;
1167	return count;
1168}
1169
1170static struct snd_info_entry_ops snd_cs4281_proc_ops_BA0 = {
1171	.read = snd_cs4281_BA0_read,
1172};
1173
1174static struct snd_info_entry_ops snd_cs4281_proc_ops_BA1 = {
1175	.read = snd_cs4281_BA1_read,
1176};
1177
1178static void snd_cs4281_proc_init(struct cs4281 *chip)
1179{
1180	struct snd_info_entry *entry;
1181
1182	if (! snd_card_proc_new(chip->card, "cs4281", &entry))
1183		snd_info_set_text_ops(entry, chip, snd_cs4281_proc_read);
1184	if (! snd_card_proc_new(chip->card, "cs4281_BA0", &entry)) {
1185		entry->content = SNDRV_INFO_CONTENT_DATA;
1186		entry->private_data = chip;
1187		entry->c.ops = &snd_cs4281_proc_ops_BA0;
1188		entry->size = CS4281_BA0_SIZE;
1189	}
1190	if (! snd_card_proc_new(chip->card, "cs4281_BA1", &entry)) {
1191		entry->content = SNDRV_INFO_CONTENT_DATA;
1192		entry->private_data = chip;
1193		entry->c.ops = &snd_cs4281_proc_ops_BA1;
1194		entry->size = CS4281_BA1_SIZE;
1195	}
1196}
1197
1198/*
1199 * joystick support
1200 */
1201
1202#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
1203
1204static void snd_cs4281_gameport_trigger(struct gameport *gameport)
1205{
1206	struct cs4281 *chip = gameport_get_port_data(gameport);
1207
1208	if (snd_BUG_ON(!chip))
1209		return;
1210	snd_cs4281_pokeBA0(chip, BA0_JSPT, 0xff);
1211}
1212
1213static unsigned char snd_cs4281_gameport_read(struct gameport *gameport)
1214{
1215	struct cs4281 *chip = gameport_get_port_data(gameport);
1216
1217	if (snd_BUG_ON(!chip))
1218		return 0;
1219	return snd_cs4281_peekBA0(chip, BA0_JSPT);
1220}
1221
1222#ifdef COOKED_MODE
1223static int snd_cs4281_gameport_cooked_read(struct gameport *gameport,
1224					   int *axes, int *buttons)
1225{
1226	struct cs4281 *chip = gameport_get_port_data(gameport);
1227	unsigned js1, js2, jst;
1228	
1229	if (snd_BUG_ON(!chip))
1230		return 0;
1231
1232	js1 = snd_cs4281_peekBA0(chip, BA0_JSC1);
1233	js2 = snd_cs4281_peekBA0(chip, BA0_JSC2);
1234	jst = snd_cs4281_peekBA0(chip, BA0_JSPT);
1235	
1236	*buttons = (~jst >> 4) & 0x0F; 
1237	
1238	axes[0] = ((js1 & JSC1_Y1V_MASK) >> JSC1_Y1V_SHIFT) & 0xFFFF;
1239	axes[1] = ((js1 & JSC1_X1V_MASK) >> JSC1_X1V_SHIFT) & 0xFFFF;
1240	axes[2] = ((js2 & JSC2_Y2V_MASK) >> JSC2_Y2V_SHIFT) & 0xFFFF;
1241	axes[3] = ((js2 & JSC2_X2V_MASK) >> JSC2_X2V_SHIFT) & 0xFFFF;
1242
1243	for (jst = 0; jst < 4; ++jst)
1244		if (axes[jst] == 0xFFFF) axes[jst] = -1;
1245	return 0;
1246}
1247#else
1248#define snd_cs4281_gameport_cooked_read	NULL
1249#endif
1250
1251static int snd_cs4281_gameport_open(struct gameport *gameport, int mode)
1252{
1253	switch (mode) {
1254#ifdef COOKED_MODE
1255	case GAMEPORT_MODE_COOKED:
1256		return 0;
1257#endif
1258	case GAMEPORT_MODE_RAW:
1259		return 0;
1260	default:
1261		return -1;
1262	}
1263	return 0;
1264}
1265
1266static int snd_cs4281_create_gameport(struct cs4281 *chip)
1267{
1268	struct gameport *gp;
1269
1270	chip->gameport = gp = gameport_allocate_port();
1271	if (!gp) {
1272		dev_err(chip->card->dev,
1273			"cannot allocate memory for gameport\n");
1274		return -ENOMEM;
1275	}
1276
1277	gameport_set_name(gp, "CS4281 Gameport");
1278	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
1279	gameport_set_dev_parent(gp, &chip->pci->dev);
1280	gp->open = snd_cs4281_gameport_open;
1281	gp->read = snd_cs4281_gameport_read;
1282	gp->trigger = snd_cs4281_gameport_trigger;
1283	gp->cooked_read = snd_cs4281_gameport_cooked_read;
1284	gameport_set_port_data(gp, chip);
1285
1286	snd_cs4281_pokeBA0(chip, BA0_JSIO, 0xFF); // ?
1287	snd_cs4281_pokeBA0(chip, BA0_JSCTL, JSCTL_SP_MEDIUM_SLOW);
1288
1289	gameport_register_port(gp);
1290
1291	return 0;
1292}
1293
1294static void snd_cs4281_free_gameport(struct cs4281 *chip)
1295{
1296	if (chip->gameport) {
1297		gameport_unregister_port(chip->gameport);
1298		chip->gameport = NULL;
1299	}
1300}
1301#else
1302static inline int snd_cs4281_create_gameport(struct cs4281 *chip) { return -ENOSYS; }
1303static inline void snd_cs4281_free_gameport(struct cs4281 *chip) { }
1304#endif /* CONFIG_GAMEPORT || (MODULE && CONFIG_GAMEPORT_MODULE) */
1305
1306static int snd_cs4281_free(struct cs4281 *chip)
1307{
1308	snd_cs4281_free_gameport(chip);
1309
1310	if (chip->irq >= 0)
1311		synchronize_irq(chip->irq);
1312
1313	/* Mask interrupts */
1314	snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff);
1315	/* Stop the DLL Clock logic. */
1316	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1317	/* Sound System Power Management - Turn Everything OFF */
1318	snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
1319	/* PCI interface - D3 state */
1320	pci_set_power_state(chip->pci, PCI_D3hot);
1321
1322	if (chip->irq >= 0)
1323		free_irq(chip->irq, chip);
1324	if (chip->ba0)
1325		iounmap(chip->ba0);
1326	if (chip->ba1)
1327		iounmap(chip->ba1);
1328	pci_release_regions(chip->pci);
1329	pci_disable_device(chip->pci);
1330
1331	kfree(chip);
1332	return 0;
1333}
1334
1335static int snd_cs4281_dev_free(struct snd_device *device)
1336{
1337	struct cs4281 *chip = device->device_data;
1338	return snd_cs4281_free(chip);
1339}
1340
1341static int snd_cs4281_chip_init(struct cs4281 *chip); /* defined below */
1342
1343static int snd_cs4281_create(struct snd_card *card,
1344			     struct pci_dev *pci,
1345			     struct cs4281 **rchip,
1346			     int dual_codec)
1347{
1348	struct cs4281 *chip;
1349	unsigned int tmp;
1350	int err;
1351	static struct snd_device_ops ops = {
1352		.dev_free =	snd_cs4281_dev_free,
1353	};
1354
1355	*rchip = NULL;
1356	if ((err = pci_enable_device(pci)) < 0)
1357		return err;
1358	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1359	if (chip == NULL) {
1360		pci_disable_device(pci);
1361		return -ENOMEM;
1362	}
1363	spin_lock_init(&chip->reg_lock);
1364	chip->card = card;
1365	chip->pci = pci;
1366	chip->irq = -1;
1367	pci_set_master(pci);
1368	if (dual_codec < 0 || dual_codec > 3) {
1369		dev_err(card->dev, "invalid dual_codec option %d\n", dual_codec);
1370		dual_codec = 0;
1371	}
1372	chip->dual_codec = dual_codec;
1373
1374	if ((err = pci_request_regions(pci, "CS4281")) < 0) {
1375		kfree(chip);
1376		pci_disable_device(pci);
1377		return err;
1378	}
1379	chip->ba0_addr = pci_resource_start(pci, 0);
1380	chip->ba1_addr = pci_resource_start(pci, 1);
1381
1382	chip->ba0 = pci_ioremap_bar(pci, 0);
1383	chip->ba1 = pci_ioremap_bar(pci, 1);
1384	if (!chip->ba0 || !chip->ba1) {
1385		snd_cs4281_free(chip);
1386		return -ENOMEM;
1387	}
1388	
1389	if (request_irq(pci->irq, snd_cs4281_interrupt, IRQF_SHARED,
1390			KBUILD_MODNAME, chip)) {
1391		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1392		snd_cs4281_free(chip);
1393		return -ENOMEM;
1394	}
1395	chip->irq = pci->irq;
1396
1397	tmp = snd_cs4281_chip_init(chip);
1398	if (tmp) {
1399		snd_cs4281_free(chip);
1400		return tmp;
1401	}
1402
1403	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1404		snd_cs4281_free(chip);
1405		return err;
1406	}
1407
1408	snd_cs4281_proc_init(chip);
1409
 
 
1410	*rchip = chip;
1411	return 0;
1412}
1413
1414static int snd_cs4281_chip_init(struct cs4281 *chip)
1415{
1416	unsigned int tmp;
1417	unsigned long end_time;
1418	int retry_count = 2;
1419
1420	/* Having EPPMC.FPDN=1 prevent proper chip initialisation */
1421	tmp = snd_cs4281_peekBA0(chip, BA0_EPPMC);
1422	if (tmp & BA0_EPPMC_FPDN)
1423		snd_cs4281_pokeBA0(chip, BA0_EPPMC, tmp & ~BA0_EPPMC_FPDN);
1424
1425      __retry:
1426	tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1427	if (tmp != BA0_CFLR_DEFAULT) {
1428		snd_cs4281_pokeBA0(chip, BA0_CFLR, BA0_CFLR_DEFAULT);
1429		tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1430		if (tmp != BA0_CFLR_DEFAULT) {
1431			dev_err(chip->card->dev,
1432				"CFLR setup failed (0x%x)\n", tmp);
1433			return -EIO;
1434		}
1435	}
1436
1437	/* Set the 'Configuration Write Protect' register
1438	 * to 4281h.  Allows vendor-defined configuration
1439         * space between 0e4h and 0ffh to be written. */	
1440	snd_cs4281_pokeBA0(chip, BA0_CWPR, 0x4281);
1441	
1442	if ((tmp = snd_cs4281_peekBA0(chip, BA0_SERC1)) != (BA0_SERC1_SO1EN | BA0_SERC1_AC97)) {
1443		dev_err(chip->card->dev,
1444			"SERC1 AC'97 check failed (0x%x)\n", tmp);
1445		return -EIO;
1446	}
1447	if ((tmp = snd_cs4281_peekBA0(chip, BA0_SERC2)) != (BA0_SERC2_SI1EN | BA0_SERC2_AC97)) {
1448		dev_err(chip->card->dev,
1449			"SERC2 AC'97 check failed (0x%x)\n", tmp);
1450		return -EIO;
1451	}
1452
1453	/* Sound System Power Management */
1454	snd_cs4281_pokeBA0(chip, BA0_SSPM, BA0_SSPM_MIXEN | BA0_SSPM_CSRCEN |
1455				           BA0_SSPM_PSRCEN | BA0_SSPM_JSEN |
1456				           BA0_SSPM_ACLEN | BA0_SSPM_FMEN);
1457
1458	/* Serial Port Power Management */
1459 	/* Blast the clock control register to zero so that the
1460         * PLL starts out in a known state, and blast the master serial
1461         * port control register to zero so that the serial ports also
1462         * start out in a known state. */
1463	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1464	snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
1465
1466        /* Make ESYN go to zero to turn off
1467         * the Sync pulse on the AC97 link. */
1468	snd_cs4281_pokeBA0(chip, BA0_ACCTL, 0);
1469	udelay(50);
1470                
1471	/*  Drive the ARST# pin low for a minimum of 1uS (as defined in the AC97
1472	 *  spec) and then drive it high.  This is done for non AC97 modes since
1473	 *  there might be logic external to the CS4281 that uses the ARST# line
1474	 *  for a reset. */
1475	snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
1476	udelay(50);
1477	snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN);
1478	msleep(50);
1479
1480	if (chip->dual_codec)
1481		snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN | BA0_SPMC_ASDI2E);
1482
1483	/*
1484	 *  Set the serial port timing configuration.
1485	 */
1486	snd_cs4281_pokeBA0(chip, BA0_SERMC,
1487			   (chip->dual_codec ? BA0_SERMC_TCID(chip->dual_codec) : BA0_SERMC_TCID(1)) |
1488			   BA0_SERMC_PTC_AC97 | BA0_SERMC_MSPE);
1489
1490	/*
1491	 *  Start the DLL Clock logic.
1492	 */
1493	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_DLLP);
1494	msleep(50);
1495	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_SWCE | BA0_CLKCR1_DLLP);
1496
1497	/*
1498	 * Wait for the DLL ready signal from the clock logic.
1499	 */
1500	end_time = jiffies + HZ;
1501	do {
1502		/*
1503		 *  Read the AC97 status register to see if we've seen a CODEC
1504		 *  signal from the AC97 codec.
1505		 */
1506		if (snd_cs4281_peekBA0(chip, BA0_CLKCR1) & BA0_CLKCR1_DLLRDY)
1507			goto __ok0;
1508		schedule_timeout_uninterruptible(1);
1509	} while (time_after_eq(end_time, jiffies));
1510
1511	dev_err(chip->card->dev, "DLLRDY not seen\n");
1512	return -EIO;
1513
1514      __ok0:
1515
1516	/*
1517	 *  The first thing we do here is to enable sync generation.  As soon
1518	 *  as we start receiving bit clock, we'll start producing the SYNC
1519	 *  signal.
1520	 */
1521	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_ESYN);
1522
1523	/*
1524	 * Wait for the codec ready signal from the AC97 codec.
1525	 */
1526	end_time = jiffies + HZ;
1527	do {
1528		/*
1529		 *  Read the AC97 status register to see if we've seen a CODEC
1530		 *  signal from the AC97 codec.
1531		 */
1532		if (snd_cs4281_peekBA0(chip, BA0_ACSTS) & BA0_ACSTS_CRDY)
1533			goto __ok1;
1534		schedule_timeout_uninterruptible(1);
1535	} while (time_after_eq(end_time, jiffies));
1536
1537	dev_err(chip->card->dev,
1538		"never read codec ready from AC'97 (0x%x)\n",
1539		snd_cs4281_peekBA0(chip, BA0_ACSTS));
1540	return -EIO;
1541
1542      __ok1:
1543	if (chip->dual_codec) {
1544		end_time = jiffies + HZ;
1545		do {
1546			if (snd_cs4281_peekBA0(chip, BA0_ACSTS2) & BA0_ACSTS_CRDY)
1547				goto __codec2_ok;
1548			schedule_timeout_uninterruptible(1);
1549		} while (time_after_eq(end_time, jiffies));
1550		dev_info(chip->card->dev,
1551			 "secondary codec doesn't respond. disable it...\n");
1552		chip->dual_codec = 0;
1553	__codec2_ok: ;
1554	}
1555
1556	/*
1557	 *  Assert the valid frame signal so that we can start sending commands
1558	 *  to the AC97 codec.
1559	 */
1560
1561	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_VFRM | BA0_ACCTL_ESYN);
1562
1563	/*
1564	 *  Wait until we've sampled input slots 3 and 4 as valid, meaning that
1565	 *  the codec is pumping ADC data across the AC-link.
1566	 */
1567
1568	end_time = jiffies + HZ;
1569	do {
1570		/*
1571		 *  Read the input slot valid register and see if input slots 3
1572		 *  4 are valid yet.
1573		 */
1574                if ((snd_cs4281_peekBA0(chip, BA0_ACISV) & (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4))) == (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4)))
1575                        goto __ok2;
1576		schedule_timeout_uninterruptible(1);
1577	} while (time_after_eq(end_time, jiffies));
1578
1579	if (--retry_count > 0)
1580		goto __retry;
1581	dev_err(chip->card->dev, "never read ISV3 and ISV4 from AC'97\n");
1582	return -EIO;
1583
1584      __ok2:
1585
1586	/*
1587	 *  Now, assert valid frame and the slot 3 and 4 valid bits.  This will
1588	 *  commense the transfer of digital audio data to the AC97 codec.
1589	 */
1590	snd_cs4281_pokeBA0(chip, BA0_ACOSV, BA0_ACOSV_SLV(3) | BA0_ACOSV_SLV(4));
1591
1592	/*
1593	 *  Initialize DMA structures
1594	 */
1595	for (tmp = 0; tmp < 4; tmp++) {
1596		struct cs4281_dma *dma = &chip->dma[tmp];
1597		dma->regDBA = BA0_DBA0 + (tmp * 0x10);
1598		dma->regDCA = BA0_DCA0 + (tmp * 0x10);
1599		dma->regDBC = BA0_DBC0 + (tmp * 0x10);
1600		dma->regDCC = BA0_DCC0 + (tmp * 0x10);
1601		dma->regDMR = BA0_DMR0 + (tmp * 8);
1602		dma->regDCR = BA0_DCR0 + (tmp * 8);
1603		dma->regHDSR = BA0_HDSR0 + (tmp * 4);
1604		dma->regFCR = BA0_FCR0 + (tmp * 4);
1605		dma->regFSIC = BA0_FSIC0 + (tmp * 4);
1606		dma->fifo_offset = tmp * CS4281_FIFO_SIZE;
1607		snd_cs4281_pokeBA0(chip, dma->regFCR,
1608				   BA0_FCR_LS(31) |
1609				   BA0_FCR_RS(31) |
1610				   BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1611				   BA0_FCR_OF(dma->fifo_offset));
1612	}
1613
1614	chip->src_left_play_slot = 0;	/* AC'97 left PCM playback (3) */
1615	chip->src_right_play_slot = 1;	/* AC'97 right PCM playback (4) */
1616	chip->src_left_rec_slot = 10;	/* AC'97 left PCM record (3) */
1617	chip->src_right_rec_slot = 11;	/* AC'97 right PCM record (4) */
1618
1619	/* Activate wave playback FIFO for FM playback */
1620	chip->dma[0].valFCR = BA0_FCR_FEN | BA0_FCR_LS(0) |
1621		              BA0_FCR_RS(1) |
1622 	  	              BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1623		              BA0_FCR_OF(chip->dma[0].fifo_offset);
1624	snd_cs4281_pokeBA0(chip, chip->dma[0].regFCR, chip->dma[0].valFCR);
1625	snd_cs4281_pokeBA0(chip, BA0_SRCSA, (chip->src_left_play_slot << 0) |
1626					    (chip->src_right_play_slot << 8) |
1627					    (chip->src_left_rec_slot << 16) |
1628					    (chip->src_right_rec_slot << 24));
1629
1630	/* Initialize digital volume */
1631	snd_cs4281_pokeBA0(chip, BA0_PPLVC, 0);
1632	snd_cs4281_pokeBA0(chip, BA0_PPRVC, 0);
1633
1634	/* Enable IRQs */
1635	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1636	/* Unmask interrupts */
1637	snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff & ~(
1638					BA0_HISR_MIDI |
1639					BA0_HISR_DMAI |
1640					BA0_HISR_DMA(0) |
1641					BA0_HISR_DMA(1) |
1642					BA0_HISR_DMA(2) |
1643					BA0_HISR_DMA(3)));
1644	synchronize_irq(chip->irq);
1645
1646	return 0;
1647}
1648
1649/*
1650 *  MIDI section
1651 */
1652
1653static void snd_cs4281_midi_reset(struct cs4281 *chip)
1654{
1655	snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr | BA0_MIDCR_MRST);
1656	udelay(100);
1657	snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1658}
1659
1660static int snd_cs4281_midi_input_open(struct snd_rawmidi_substream *substream)
1661{
1662	struct cs4281 *chip = substream->rmidi->private_data;
1663
1664	spin_lock_irq(&chip->reg_lock);
1665 	chip->midcr |= BA0_MIDCR_RXE;
1666	chip->midi_input = substream;
1667	if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1668		snd_cs4281_midi_reset(chip);
1669	} else {
1670		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1671	}
1672	spin_unlock_irq(&chip->reg_lock);
1673	return 0;
1674}
1675
1676static int snd_cs4281_midi_input_close(struct snd_rawmidi_substream *substream)
1677{
1678	struct cs4281 *chip = substream->rmidi->private_data;
1679
1680	spin_lock_irq(&chip->reg_lock);
1681	chip->midcr &= ~(BA0_MIDCR_RXE | BA0_MIDCR_RIE);
1682	chip->midi_input = NULL;
1683	if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1684		snd_cs4281_midi_reset(chip);
1685	} else {
1686		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1687	}
1688	chip->uartm &= ~CS4281_MODE_INPUT;
1689	spin_unlock_irq(&chip->reg_lock);
1690	return 0;
1691}
1692
1693static int snd_cs4281_midi_output_open(struct snd_rawmidi_substream *substream)
1694{
1695	struct cs4281 *chip = substream->rmidi->private_data;
1696
1697	spin_lock_irq(&chip->reg_lock);
1698	chip->uartm |= CS4281_MODE_OUTPUT;
1699	chip->midcr |= BA0_MIDCR_TXE;
1700	chip->midi_output = substream;
1701	if (!(chip->uartm & CS4281_MODE_INPUT)) {
1702		snd_cs4281_midi_reset(chip);
1703	} else {
1704		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1705	}
1706	spin_unlock_irq(&chip->reg_lock);
1707	return 0;
1708}
1709
1710static int snd_cs4281_midi_output_close(struct snd_rawmidi_substream *substream)
1711{
1712	struct cs4281 *chip = substream->rmidi->private_data;
1713
1714	spin_lock_irq(&chip->reg_lock);
1715	chip->midcr &= ~(BA0_MIDCR_TXE | BA0_MIDCR_TIE);
1716	chip->midi_output = NULL;
1717	if (!(chip->uartm & CS4281_MODE_INPUT)) {
1718		snd_cs4281_midi_reset(chip);
1719	} else {
1720		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1721	}
1722	chip->uartm &= ~CS4281_MODE_OUTPUT;
1723	spin_unlock_irq(&chip->reg_lock);
1724	return 0;
1725}
1726
1727static void snd_cs4281_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1728{
1729	unsigned long flags;
1730	struct cs4281 *chip = substream->rmidi->private_data;
1731
1732	spin_lock_irqsave(&chip->reg_lock, flags);
1733	if (up) {
1734		if ((chip->midcr & BA0_MIDCR_RIE) == 0) {
1735			chip->midcr |= BA0_MIDCR_RIE;
1736			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1737		}
1738	} else {
1739		if (chip->midcr & BA0_MIDCR_RIE) {
1740			chip->midcr &= ~BA0_MIDCR_RIE;
1741			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1742		}
1743	}
1744	spin_unlock_irqrestore(&chip->reg_lock, flags);
1745}
1746
1747static void snd_cs4281_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1748{
1749	unsigned long flags;
1750	struct cs4281 *chip = substream->rmidi->private_data;
1751	unsigned char byte;
1752
1753	spin_lock_irqsave(&chip->reg_lock, flags);
1754	if (up) {
1755		if ((chip->midcr & BA0_MIDCR_TIE) == 0) {
1756			chip->midcr |= BA0_MIDCR_TIE;
1757			/* fill UART FIFO buffer at first, and turn Tx interrupts only if necessary */
1758			while ((chip->midcr & BA0_MIDCR_TIE) &&
1759			       (snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1760				if (snd_rawmidi_transmit(substream, &byte, 1) != 1) {
1761					chip->midcr &= ~BA0_MIDCR_TIE;
1762				} else {
1763					snd_cs4281_pokeBA0(chip, BA0_MIDWP, byte);
1764				}
1765			}
1766			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1767		}
1768	} else {
1769		if (chip->midcr & BA0_MIDCR_TIE) {
1770			chip->midcr &= ~BA0_MIDCR_TIE;
1771			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1772		}
1773	}
1774	spin_unlock_irqrestore(&chip->reg_lock, flags);
1775}
1776
1777static struct snd_rawmidi_ops snd_cs4281_midi_output =
1778{
1779	.open =		snd_cs4281_midi_output_open,
1780	.close =	snd_cs4281_midi_output_close,
1781	.trigger =	snd_cs4281_midi_output_trigger,
1782};
1783
1784static struct snd_rawmidi_ops snd_cs4281_midi_input =
1785{
1786	.open = 	snd_cs4281_midi_input_open,
1787	.close =	snd_cs4281_midi_input_close,
1788	.trigger =	snd_cs4281_midi_input_trigger,
1789};
1790
1791static int snd_cs4281_midi(struct cs4281 *chip, int device,
1792			   struct snd_rawmidi **rrawmidi)
1793{
1794	struct snd_rawmidi *rmidi;
1795	int err;
1796
1797	if (rrawmidi)
1798		*rrawmidi = NULL;
1799	if ((err = snd_rawmidi_new(chip->card, "CS4281", device, 1, 1, &rmidi)) < 0)
1800		return err;
1801	strcpy(rmidi->name, "CS4281");
1802	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_cs4281_midi_output);
1803	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_cs4281_midi_input);
1804	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
1805	rmidi->private_data = chip;
1806	chip->rmidi = rmidi;
1807	if (rrawmidi)
1808		*rrawmidi = rmidi;
1809	return 0;
1810}
1811
1812/*
1813 *  Interrupt handler
1814 */
1815
1816static irqreturn_t snd_cs4281_interrupt(int irq, void *dev_id)
1817{
1818	struct cs4281 *chip = dev_id;
1819	unsigned int status, dma, val;
1820	struct cs4281_dma *cdma;
1821
1822	if (chip == NULL)
1823		return IRQ_NONE;
1824	status = snd_cs4281_peekBA0(chip, BA0_HISR);
1825	if ((status & 0x7fffffff) == 0) {
1826		snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1827		return IRQ_NONE;
1828	}
1829
1830	if (status & (BA0_HISR_DMA(0)|BA0_HISR_DMA(1)|BA0_HISR_DMA(2)|BA0_HISR_DMA(3))) {
1831		for (dma = 0; dma < 4; dma++)
1832			if (status & BA0_HISR_DMA(dma)) {
1833				cdma = &chip->dma[dma];
1834				spin_lock(&chip->reg_lock);
1835				/* ack DMA IRQ */
1836				val = snd_cs4281_peekBA0(chip, cdma->regHDSR);
1837				/* workaround, sometimes CS4281 acknowledges */
1838				/* end or middle transfer position twice */
1839				cdma->frag++;
1840				if ((val & BA0_HDSR_DHTC) && !(cdma->frag & 1)) {
1841					cdma->frag--;
1842					chip->spurious_dhtc_irq++;
1843					spin_unlock(&chip->reg_lock);
1844					continue;
1845				}
1846				if ((val & BA0_HDSR_DTC) && (cdma->frag & 1)) {
1847					cdma->frag--;
1848					chip->spurious_dtc_irq++;
1849					spin_unlock(&chip->reg_lock);
1850					continue;
1851				}
1852				spin_unlock(&chip->reg_lock);
1853				snd_pcm_period_elapsed(cdma->substream);
1854			}
1855	}
1856
1857	if ((status & BA0_HISR_MIDI) && chip->rmidi) {
1858		unsigned char c;
1859		
1860		spin_lock(&chip->reg_lock);
1861		while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_RBE) == 0) {
1862			c = snd_cs4281_peekBA0(chip, BA0_MIDRP);
1863			if ((chip->midcr & BA0_MIDCR_RIE) == 0)
1864				continue;
1865			snd_rawmidi_receive(chip->midi_input, &c, 1);
1866		}
1867		while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1868			if ((chip->midcr & BA0_MIDCR_TIE) == 0)
1869				break;
1870			if (snd_rawmidi_transmit(chip->midi_output, &c, 1) != 1) {
1871				chip->midcr &= ~BA0_MIDCR_TIE;
1872				snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1873				break;
1874			}
1875			snd_cs4281_pokeBA0(chip, BA0_MIDWP, c);
1876		}
1877		spin_unlock(&chip->reg_lock);
1878	}
1879
1880	/* EOI to the PCI part... reenables interrupts */
1881	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1882
1883	return IRQ_HANDLED;
1884}
1885
1886
1887/*
1888 * OPL3 command
1889 */
1890static void snd_cs4281_opl3_command(struct snd_opl3 *opl3, unsigned short cmd,
1891				    unsigned char val)
1892{
1893	unsigned long flags;
1894	struct cs4281 *chip = opl3->private_data;
1895	void __iomem *port;
1896
1897	if (cmd & OPL3_RIGHT)
1898		port = chip->ba0 + BA0_B1AP; /* right port */
1899	else
1900		port = chip->ba0 + BA0_B0AP; /* left port */
1901
1902	spin_lock_irqsave(&opl3->reg_lock, flags);
1903
1904	writel((unsigned int)cmd, port);
1905	udelay(10);
1906
1907	writel((unsigned int)val, port + 4);
1908	udelay(30);
1909
1910	spin_unlock_irqrestore(&opl3->reg_lock, flags);
1911}
1912
1913static int snd_cs4281_probe(struct pci_dev *pci,
1914			    const struct pci_device_id *pci_id)
1915{
1916	static int dev;
1917	struct snd_card *card;
1918	struct cs4281 *chip;
1919	struct snd_opl3 *opl3;
1920	int err;
1921
1922        if (dev >= SNDRV_CARDS)
1923                return -ENODEV;
1924	if (!enable[dev]) {
1925		dev++;
1926		return -ENOENT;
1927	}
1928
1929	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
1930			   0, &card);
1931	if (err < 0)
1932		return err;
1933
1934	if ((err = snd_cs4281_create(card, pci, &chip, dual_codec[dev])) < 0) {
1935		snd_card_free(card);
1936		return err;
1937	}
1938	card->private_data = chip;
1939
1940	if ((err = snd_cs4281_mixer(chip)) < 0) {
1941		snd_card_free(card);
1942		return err;
1943	}
1944	if ((err = snd_cs4281_pcm(chip, 0, NULL)) < 0) {
1945		snd_card_free(card);
1946		return err;
1947	}
1948	if ((err = snd_cs4281_midi(chip, 0, NULL)) < 0) {
1949		snd_card_free(card);
1950		return err;
1951	}
1952	if ((err = snd_opl3_new(card, OPL3_HW_OPL3_CS4281, &opl3)) < 0) {
1953		snd_card_free(card);
1954		return err;
1955	}
1956	opl3->private_data = chip;
1957	opl3->command = snd_cs4281_opl3_command;
1958	snd_opl3_init(opl3);
1959	if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
1960		snd_card_free(card);
1961		return err;
1962	}
1963	snd_cs4281_create_gameport(chip);
1964	strcpy(card->driver, "CS4281");
1965	strcpy(card->shortname, "Cirrus Logic CS4281");
1966	sprintf(card->longname, "%s at 0x%lx, irq %d",
1967		card->shortname,
1968		chip->ba0_addr,
1969		chip->irq);
1970
1971	if ((err = snd_card_register(card)) < 0) {
1972		snd_card_free(card);
1973		return err;
1974	}
1975
1976	pci_set_drvdata(pci, card);
1977	dev++;
1978	return 0;
1979}
1980
1981static void snd_cs4281_remove(struct pci_dev *pci)
1982{
1983	snd_card_free(pci_get_drvdata(pci));
 
1984}
1985
1986/*
1987 * Power Management
1988 */
1989#ifdef CONFIG_PM_SLEEP
1990
1991static int saved_regs[SUSPEND_REGISTERS] = {
1992	BA0_JSCTL,
1993	BA0_GPIOR,
1994	BA0_SSCR,
1995	BA0_MIDCR,
1996	BA0_SRCSA,
1997	BA0_PASR,
1998	BA0_CASR,
1999	BA0_DACSR,
2000	BA0_ADCSR,
2001	BA0_FMLVC,
2002	BA0_FMRVC,
2003	BA0_PPLVC,
2004	BA0_PPRVC,
2005};
2006
2007#define CLKCR1_CKRA                             0x00010000L
2008
2009static int cs4281_suspend(struct device *dev)
2010{
2011	struct pci_dev *pci = to_pci_dev(dev);
2012	struct snd_card *card = dev_get_drvdata(dev);
2013	struct cs4281 *chip = card->private_data;
2014	u32 ulCLK;
2015	unsigned int i;
2016
2017	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
2018	snd_pcm_suspend_all(chip->pcm);
2019
2020	snd_ac97_suspend(chip->ac97);
2021	snd_ac97_suspend(chip->ac97_secondary);
2022
2023	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2024	ulCLK |= CLKCR1_CKRA;
2025	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2026
2027	/* Disable interrupts. */
2028	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_CHGM);
2029
2030	/* remember the status registers */
2031	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
2032		if (saved_regs[i])
2033			chip->suspend_regs[i] = snd_cs4281_peekBA0(chip, saved_regs[i]);
2034
2035	/* Turn off the serial ports. */
2036	snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
2037
2038	/* Power off FM, Joystick, AC link, */
2039	snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
2040
2041	/* DLL off. */
2042	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
2043
2044	/* AC link off. */
2045	snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
2046
2047	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2048	ulCLK &= ~CLKCR1_CKRA;
2049	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2050
2051	pci_disable_device(pci);
2052	pci_save_state(pci);
2053	pci_set_power_state(pci, PCI_D3hot);
2054	return 0;
2055}
2056
2057static int cs4281_resume(struct device *dev)
2058{
2059	struct pci_dev *pci = to_pci_dev(dev);
2060	struct snd_card *card = dev_get_drvdata(dev);
2061	struct cs4281 *chip = card->private_data;
2062	unsigned int i;
2063	u32 ulCLK;
2064
2065	pci_set_power_state(pci, PCI_D0);
2066	pci_restore_state(pci);
2067	if (pci_enable_device(pci) < 0) {
2068		dev_err(dev, "pci_enable_device failed, disabling device\n");
 
2069		snd_card_disconnect(card);
2070		return -EIO;
2071	}
2072	pci_set_master(pci);
2073
2074	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2075	ulCLK |= CLKCR1_CKRA;
2076	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2077
2078	snd_cs4281_chip_init(chip);
2079
2080	/* restore the status registers */
2081	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
2082		if (saved_regs[i])
2083			snd_cs4281_pokeBA0(chip, saved_regs[i], chip->suspend_regs[i]);
2084
2085	snd_ac97_resume(chip->ac97);
2086	snd_ac97_resume(chip->ac97_secondary);
2087
2088	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2089	ulCLK &= ~CLKCR1_CKRA;
2090	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2091
2092	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
2093	return 0;
2094}
2095
2096static SIMPLE_DEV_PM_OPS(cs4281_pm, cs4281_suspend, cs4281_resume);
2097#define CS4281_PM_OPS	&cs4281_pm
2098#else
2099#define CS4281_PM_OPS	NULL
2100#endif /* CONFIG_PM_SLEEP */
2101
2102static struct pci_driver cs4281_driver = {
2103	.name = KBUILD_MODNAME,
2104	.id_table = snd_cs4281_ids,
2105	.probe = snd_cs4281_probe,
2106	.remove = snd_cs4281_remove,
2107	.driver = {
2108		.pm = CS4281_PM_OPS,
2109	},
 
2110};
2111	
2112module_pci_driver(cs4281_driver);