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/moduleparam.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 int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable switches */
  48static int 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
 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	snd_printk(KERN_ERR "AC'97 write problem, reg = 0x%x, val = 0x%x\n", reg, val);
 
 568}
 569
 570static unsigned short snd_cs4281_ac97_read(struct snd_ac97 *ac97,
 571					   unsigned short reg)
 572{
 573	struct cs4281 *chip = ac97->private_data;
 574	int count;
 575	unsigned short result;
 576	// FIXME: volatile is necessary in the following due to a bug of
 577	// some gcc versions
 578	volatile int ac97_num = ((volatile struct snd_ac97 *)ac97)->num;
 579
 580	/*
 581	 *  1. Write ACCAD = Command Address Register = 46Ch for AC97 register address
 582	 *  2. Write ACCDA = Command Data Register = 470h    for data to write to AC97 
 583	 *  3. Write ACCTL = Control Register = 460h for initiating the write
 584	 *  4. Read ACCTL = 460h, DCV should be reset by now and 460h = 17h
 585	 *  5. if DCV not cleared, break and return error
 586	 *  6. Read ACSTS = Status Register = 464h, check VSTS bit
 587	 */
 588
 589	snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSDA2 : BA0_ACSDA);
 590
 591	/*
 592	 *  Setup the AC97 control registers on the CS461x to send the
 593	 *  appropriate command to the AC97 to perform the read.
 594	 *  ACCAD = Command Address Register = 46Ch
 595	 *  ACCDA = Command Data Register = 470h
 596	 *  ACCTL = Control Register = 460h
 597	 *  set DCV - will clear when process completed
 598	 *  set CRW - Read command
 599	 *  set VFRM - valid frame enabled
 600	 *  set ESYN - ASYNC generation enabled
 601	 *  set RSTN - ARST# inactive, AC97 codec not reset
 602	 */
 603
 604	snd_cs4281_pokeBA0(chip, BA0_ACCAD, reg);
 605	snd_cs4281_pokeBA0(chip, BA0_ACCDA, 0);
 606	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_DCV | BA0_ACCTL_CRW |
 607					    BA0_ACCTL_VFRM | BA0_ACCTL_ESYN |
 608			   (ac97_num ? BA0_ACCTL_TC : 0));
 609
 610
 611	/*
 612	 *  Wait for the read to occur.
 613	 */
 614	for (count = 0; count < 500; count++) {
 615		/*
 616		 *  First, we want to wait for a short time.
 617	 	 */
 618		udelay(10);
 619		/*
 620		 *  Now, check to see if the read has completed.
 621		 *  ACCTL = 460h, DCV should be reset by now and 460h = 17h
 622		 */
 623		if (!(snd_cs4281_peekBA0(chip, BA0_ACCTL) & BA0_ACCTL_DCV))
 624			goto __ok1;
 625	}
 626
 627	snd_printk(KERN_ERR "AC'97 read problem (ACCTL_DCV), reg = 0x%x\n", reg);
 
 628	result = 0xffff;
 629	goto __end;
 630	
 631      __ok1:
 632	/*
 633	 *  Wait for the valid status bit to go active.
 634	 */
 635	for (count = 0; count < 100; count++) {
 636		/*
 637		 *  Read the AC97 status register.
 638		 *  ACSTS = Status Register = 464h
 639		 *  VSTS - Valid Status
 640		 */
 641		if (snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSTS2 : BA0_ACSTS) & BA0_ACSTS_VSTS)
 642			goto __ok2;
 643		udelay(10);
 644	}
 645	
 646	snd_printk(KERN_ERR "AC'97 read problem (ACSTS_VSTS), reg = 0x%x\n", reg);
 
 647	result = 0xffff;
 648	goto __end;
 649
 650      __ok2:
 651	/*
 652	 *  Read the data returned from the AC97 register.
 653	 *  ACSDA = Status Data Register = 474h
 654	 */
 655	result = snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSDA2 : BA0_ACSDA);
 656
 657      __end:
 658	return result;
 659}
 660
 661/*
 662 *  PCM part
 663 */
 664
 665static int snd_cs4281_trigger(struct snd_pcm_substream *substream, int cmd)
 666{
 667	struct cs4281_dma *dma = substream->runtime->private_data;
 668	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 669
 670	spin_lock(&chip->reg_lock);
 671	switch (cmd) {
 672	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 673		dma->valDCR |= BA0_DCR_MSK;
 674		dma->valFCR |= BA0_FCR_FEN;
 675		break;
 676	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 677		dma->valDCR &= ~BA0_DCR_MSK;
 678		dma->valFCR &= ~BA0_FCR_FEN;
 679		break;
 680	case SNDRV_PCM_TRIGGER_START:
 681	case SNDRV_PCM_TRIGGER_RESUME:
 682		snd_cs4281_pokeBA0(chip, dma->regDMR, dma->valDMR & ~BA0_DMR_DMA);
 683		dma->valDMR |= BA0_DMR_DMA;
 684		dma->valDCR &= ~BA0_DCR_MSK;
 685		dma->valFCR |= BA0_FCR_FEN;
 686		break;
 687	case SNDRV_PCM_TRIGGER_STOP:
 688	case SNDRV_PCM_TRIGGER_SUSPEND:
 689		dma->valDMR &= ~(BA0_DMR_DMA|BA0_DMR_POLL);
 690		dma->valDCR |= BA0_DCR_MSK;
 691		dma->valFCR &= ~BA0_FCR_FEN;
 692		/* Leave wave playback FIFO enabled for FM */
 693		if (dma->regFCR != BA0_FCR0)
 694			dma->valFCR &= ~BA0_FCR_FEN;
 695		break;
 696	default:
 697		spin_unlock(&chip->reg_lock);
 698		return -EINVAL;
 699	}
 700	snd_cs4281_pokeBA0(chip, dma->regDMR, dma->valDMR);
 701	snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR);
 702	snd_cs4281_pokeBA0(chip, dma->regDCR, dma->valDCR);
 703	spin_unlock(&chip->reg_lock);
 704	return 0;
 705}
 706
 707static unsigned int snd_cs4281_rate(unsigned int rate, unsigned int *real_rate)
 708{
 709	unsigned int val = ~0;
 710	
 711	if (real_rate)
 712		*real_rate = rate;
 713	/* special "hardcoded" rates */
 714	switch (rate) {
 715	case 8000:	return 5;
 716	case 11025:	return 4;
 717	case 16000:	return 3;
 718	case 22050:	return 2;
 719	case 44100:	return 1;
 720	case 48000:	return 0;
 721	default:
 722		goto __variable;
 723	}
 724      __variable:
 725	val = 1536000 / rate;
 726	if (real_rate)
 727		*real_rate = 1536000 / val;
 728	return val;
 729}
 730
 731static void snd_cs4281_mode(struct cs4281 *chip, struct cs4281_dma *dma,
 732			    struct snd_pcm_runtime *runtime,
 733			    int capture, int src)
 734{
 735	int rec_mono;
 736
 737	dma->valDMR = BA0_DMR_TYPE_SINGLE | BA0_DMR_AUTO |
 738		      (capture ? BA0_DMR_TR_WRITE : BA0_DMR_TR_READ);
 739	if (runtime->channels == 1)
 740		dma->valDMR |= BA0_DMR_MONO;
 741	if (snd_pcm_format_unsigned(runtime->format) > 0)
 742		dma->valDMR |= BA0_DMR_USIGN;
 743	if (snd_pcm_format_big_endian(runtime->format) > 0)
 744		dma->valDMR |= BA0_DMR_BEND;
 745	switch (snd_pcm_format_width(runtime->format)) {
 746	case 8: dma->valDMR |= BA0_DMR_SIZE8;
 747		if (runtime->channels == 1)
 748			dma->valDMR |= BA0_DMR_SWAPC;
 749		break;
 750	case 32: dma->valDMR |= BA0_DMR_SIZE20; break;
 751	}
 752	dma->frag = 0;	/* for workaround */
 753	dma->valDCR = BA0_DCR_TCIE | BA0_DCR_MSK;
 754	if (runtime->buffer_size != runtime->period_size)
 755		dma->valDCR |= BA0_DCR_HTCIE;
 756	/* Initialize DMA */
 757	snd_cs4281_pokeBA0(chip, dma->regDBA, runtime->dma_addr);
 758	snd_cs4281_pokeBA0(chip, dma->regDBC, runtime->buffer_size - 1);
 759	rec_mono = (chip->dma[1].valDMR & BA0_DMR_MONO) == BA0_DMR_MONO;
 760	snd_cs4281_pokeBA0(chip, BA0_SRCSA, (chip->src_left_play_slot << 0) |
 761					    (chip->src_right_play_slot << 8) |
 762					    (chip->src_left_rec_slot << 16) |
 763					    ((rec_mono ? 31 : chip->src_right_rec_slot) << 24));
 764	if (!src)
 765		goto __skip_src;
 766	if (!capture) {
 767		if (dma->left_slot == chip->src_left_play_slot) {
 768			unsigned int val = snd_cs4281_rate(runtime->rate, NULL);
 769			snd_BUG_ON(dma->right_slot != chip->src_right_play_slot);
 770			snd_cs4281_pokeBA0(chip, BA0_DACSR, val);
 771		}
 772	} else {
 773		if (dma->left_slot == chip->src_left_rec_slot) {
 774			unsigned int val = snd_cs4281_rate(runtime->rate, NULL);
 775			snd_BUG_ON(dma->right_slot != chip->src_right_rec_slot);
 776			snd_cs4281_pokeBA0(chip, BA0_ADCSR, val);
 777		}
 778	}
 779      __skip_src:
 780	/* Deactivate wave playback FIFO before changing slot assignments */
 781	if (dma->regFCR == BA0_FCR0)
 782		snd_cs4281_pokeBA0(chip, dma->regFCR, snd_cs4281_peekBA0(chip, dma->regFCR) & ~BA0_FCR_FEN);
 783	/* Initialize FIFO */
 784	dma->valFCR = BA0_FCR_LS(dma->left_slot) |
 785		      BA0_FCR_RS(capture && (dma->valDMR & BA0_DMR_MONO) ? 31 : dma->right_slot) |
 786		      BA0_FCR_SZ(CS4281_FIFO_SIZE) |
 787		      BA0_FCR_OF(dma->fifo_offset);
 788	snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR | (capture ? BA0_FCR_PSH : 0));
 789	/* Activate FIFO again for FM playback */
 790	if (dma->regFCR == BA0_FCR0)
 791		snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR | BA0_FCR_FEN);
 792	/* Clear FIFO Status and Interrupt Control Register */
 793	snd_cs4281_pokeBA0(chip, dma->regFSIC, 0);
 794}
 795
 796static int snd_cs4281_hw_params(struct snd_pcm_substream *substream,
 797				struct snd_pcm_hw_params *hw_params)
 798{
 799	return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 800}
 801
 802static int snd_cs4281_hw_free(struct snd_pcm_substream *substream)
 803{
 804	return snd_pcm_lib_free_pages(substream);
 805}
 806
 807static int snd_cs4281_playback_prepare(struct snd_pcm_substream *substream)
 808{
 809	struct snd_pcm_runtime *runtime = substream->runtime;
 810	struct cs4281_dma *dma = runtime->private_data;
 811	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 812
 813	spin_lock_irq(&chip->reg_lock);
 814	snd_cs4281_mode(chip, dma, runtime, 0, 1);
 815	spin_unlock_irq(&chip->reg_lock);
 816	return 0;
 817}
 818
 819static int snd_cs4281_capture_prepare(struct snd_pcm_substream *substream)
 820{
 821	struct snd_pcm_runtime *runtime = substream->runtime;
 822	struct cs4281_dma *dma = runtime->private_data;
 823	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 824
 825	spin_lock_irq(&chip->reg_lock);
 826	snd_cs4281_mode(chip, dma, runtime, 1, 1);
 827	spin_unlock_irq(&chip->reg_lock);
 828	return 0;
 829}
 830
 831static snd_pcm_uframes_t snd_cs4281_pointer(struct snd_pcm_substream *substream)
 832{
 833	struct snd_pcm_runtime *runtime = substream->runtime;
 834	struct cs4281_dma *dma = runtime->private_data;
 835	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 836
 837	/*
 838	printk(KERN_DEBUG "DCC = 0x%x, buffer_size = 0x%x, jiffies = %li\n",
 839	       snd_cs4281_peekBA0(chip, dma->regDCC), runtime->buffer_size,
 
 840	       jiffies);
 841	*/
 842	return runtime->buffer_size -
 843	       snd_cs4281_peekBA0(chip, dma->regDCC) - 1;
 844}
 845
 846static struct snd_pcm_hardware snd_cs4281_playback =
 847{
 848	.info =			SNDRV_PCM_INFO_MMAP |
 849				SNDRV_PCM_INFO_INTERLEAVED |
 850				SNDRV_PCM_INFO_MMAP_VALID |
 851				SNDRV_PCM_INFO_PAUSE |
 852				SNDRV_PCM_INFO_RESUME,
 853	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
 854				SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
 855				SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
 856				SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
 857				SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE,
 858	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 859	.rate_min =		4000,
 860	.rate_max =		48000,
 861	.channels_min =		1,
 862	.channels_max =		2,
 863	.buffer_bytes_max =	(512*1024),
 864	.period_bytes_min =	64,
 865	.period_bytes_max =	(512*1024),
 866	.periods_min =		1,
 867	.periods_max =		2,
 868	.fifo_size =		CS4281_FIFO_SIZE,
 869};
 870
 871static struct snd_pcm_hardware snd_cs4281_capture =
 872{
 873	.info =			SNDRV_PCM_INFO_MMAP |
 874				SNDRV_PCM_INFO_INTERLEAVED |
 875				SNDRV_PCM_INFO_MMAP_VALID |
 876				SNDRV_PCM_INFO_PAUSE |
 877				SNDRV_PCM_INFO_RESUME,
 878	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
 879				SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
 880				SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
 881				SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
 882				SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE,
 883	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 884	.rate_min =		4000,
 885	.rate_max =		48000,
 886	.channels_min =		1,
 887	.channels_max =		2,
 888	.buffer_bytes_max =	(512*1024),
 889	.period_bytes_min =	64,
 890	.period_bytes_max =	(512*1024),
 891	.periods_min =		1,
 892	.periods_max =		2,
 893	.fifo_size =		CS4281_FIFO_SIZE,
 894};
 895
 896static int snd_cs4281_playback_open(struct snd_pcm_substream *substream)
 897{
 898	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 899	struct snd_pcm_runtime *runtime = substream->runtime;
 900	struct cs4281_dma *dma;
 901
 902	dma = &chip->dma[0];
 903	dma->substream = substream;
 904	dma->left_slot = 0;
 905	dma->right_slot = 1;
 906	runtime->private_data = dma;
 907	runtime->hw = snd_cs4281_playback;
 908	/* should be detected from the AC'97 layer, but it seems
 909	   that although CS4297A rev B reports 18-bit ADC resolution,
 910	   samples are 20-bit */
 911	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 20);
 912	return 0;
 913}
 914
 915static int snd_cs4281_capture_open(struct snd_pcm_substream *substream)
 916{
 917	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 918	struct snd_pcm_runtime *runtime = substream->runtime;
 919	struct cs4281_dma *dma;
 920
 921	dma = &chip->dma[1];
 922	dma->substream = substream;
 923	dma->left_slot = 10;
 924	dma->right_slot = 11;
 925	runtime->private_data = dma;
 926	runtime->hw = snd_cs4281_capture;
 927	/* should be detected from the AC'97 layer, but it seems
 928	   that although CS4297A rev B reports 18-bit ADC resolution,
 929	   samples are 20-bit */
 930	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 20);
 931	return 0;
 932}
 933
 934static int snd_cs4281_playback_close(struct snd_pcm_substream *substream)
 935{
 936	struct cs4281_dma *dma = substream->runtime->private_data;
 937
 938	dma->substream = NULL;
 939	return 0;
 940}
 941
 942static int snd_cs4281_capture_close(struct snd_pcm_substream *substream)
 943{
 944	struct cs4281_dma *dma = substream->runtime->private_data;
 945
 946	dma->substream = NULL;
 947	return 0;
 948}
 949
 950static struct snd_pcm_ops snd_cs4281_playback_ops = {
 951	.open =		snd_cs4281_playback_open,
 952	.close =	snd_cs4281_playback_close,
 953	.ioctl =	snd_pcm_lib_ioctl,
 954	.hw_params =	snd_cs4281_hw_params,
 955	.hw_free =	snd_cs4281_hw_free,
 956	.prepare =	snd_cs4281_playback_prepare,
 957	.trigger =	snd_cs4281_trigger,
 958	.pointer =	snd_cs4281_pointer,
 959};
 960
 961static struct snd_pcm_ops snd_cs4281_capture_ops = {
 962	.open =		snd_cs4281_capture_open,
 963	.close =	snd_cs4281_capture_close,
 964	.ioctl =	snd_pcm_lib_ioctl,
 965	.hw_params =	snd_cs4281_hw_params,
 966	.hw_free =	snd_cs4281_hw_free,
 967	.prepare =	snd_cs4281_capture_prepare,
 968	.trigger =	snd_cs4281_trigger,
 969	.pointer =	snd_cs4281_pointer,
 970};
 971
 972static int __devinit snd_cs4281_pcm(struct cs4281 * chip, int device,
 973				    struct snd_pcm ** rpcm)
 974{
 975	struct snd_pcm *pcm;
 976	int err;
 977
 978	if (rpcm)
 979		*rpcm = NULL;
 980	err = snd_pcm_new(chip->card, "CS4281", device, 1, 1, &pcm);
 981	if (err < 0)
 982		return err;
 983
 984	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs4281_playback_ops);
 985	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs4281_capture_ops);
 986
 987	pcm->private_data = chip;
 988	pcm->info_flags = 0;
 989	strcpy(pcm->name, "CS4281");
 990	chip->pcm = pcm;
 991
 992	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 993					      snd_dma_pci_data(chip->pci), 64*1024, 512*1024);
 994
 995	if (rpcm)
 996		*rpcm = pcm;
 997	return 0;
 998}
 999
1000/*
1001 *  Mixer section
1002 */
1003
1004#define CS_VOL_MASK	0x1f
1005
1006static int snd_cs4281_info_volume(struct snd_kcontrol *kcontrol,
1007				  struct snd_ctl_elem_info *uinfo)
1008{
1009	uinfo->type              = SNDRV_CTL_ELEM_TYPE_INTEGER;
1010	uinfo->count             = 2;
1011	uinfo->value.integer.min = 0;
1012	uinfo->value.integer.max = CS_VOL_MASK;
1013	return 0;
1014}
1015 
1016static int snd_cs4281_get_volume(struct snd_kcontrol *kcontrol,
1017				 struct snd_ctl_elem_value *ucontrol)
1018{
1019	struct cs4281 *chip = snd_kcontrol_chip(kcontrol);
1020	int regL = (kcontrol->private_value >> 16) & 0xffff;
1021	int regR = kcontrol->private_value & 0xffff;
1022	int volL, volR;
1023
1024	volL = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regL) & CS_VOL_MASK);
1025	volR = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regR) & CS_VOL_MASK);
1026
1027	ucontrol->value.integer.value[0] = volL;
1028	ucontrol->value.integer.value[1] = volR;
1029	return 0;
1030}
1031
1032static int snd_cs4281_put_volume(struct snd_kcontrol *kcontrol,
1033				 struct snd_ctl_elem_value *ucontrol)
1034{
1035	struct cs4281 *chip = snd_kcontrol_chip(kcontrol);
1036	int change = 0;
1037	int regL = (kcontrol->private_value >> 16) & 0xffff;
1038	int regR = kcontrol->private_value & 0xffff;
1039	int volL, volR;
1040
1041	volL = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regL) & CS_VOL_MASK);
1042	volR = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regR) & CS_VOL_MASK);
1043
1044	if (ucontrol->value.integer.value[0] != volL) {
1045		volL = CS_VOL_MASK - (ucontrol->value.integer.value[0] & CS_VOL_MASK);
1046		snd_cs4281_pokeBA0(chip, regL, volL);
1047		change = 1;
1048	}
1049	if (ucontrol->value.integer.value[1] != volR) {
1050		volR = CS_VOL_MASK - (ucontrol->value.integer.value[1] & CS_VOL_MASK);
1051		snd_cs4281_pokeBA0(chip, regR, volR);
1052		change = 1;
1053	}
1054	return change;
1055}
1056
1057static const DECLARE_TLV_DB_SCALE(db_scale_dsp, -4650, 150, 0);
1058
1059static struct snd_kcontrol_new snd_cs4281_fm_vol = 
1060{
1061	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1062	.name = "Synth Playback Volume",
1063	.info = snd_cs4281_info_volume, 
1064	.get = snd_cs4281_get_volume,
1065	.put = snd_cs4281_put_volume, 
1066	.private_value = ((BA0_FMLVC << 16) | BA0_FMRVC),
1067	.tlv = { .p = db_scale_dsp },
1068};
1069
1070static struct snd_kcontrol_new snd_cs4281_pcm_vol = 
1071{
1072	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1073	.name = "PCM Stream Playback Volume",
1074	.info = snd_cs4281_info_volume, 
1075	.get = snd_cs4281_get_volume,
1076	.put = snd_cs4281_put_volume, 
1077	.private_value = ((BA0_PPLVC << 16) | BA0_PPRVC),
1078	.tlv = { .p = db_scale_dsp },
1079};
1080
1081static void snd_cs4281_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
1082{
1083	struct cs4281 *chip = bus->private_data;
1084	chip->ac97_bus = NULL;
1085}
1086
1087static void snd_cs4281_mixer_free_ac97(struct snd_ac97 *ac97)
1088{
1089	struct cs4281 *chip = ac97->private_data;
1090	if (ac97->num)
1091		chip->ac97_secondary = NULL;
1092	else
1093		chip->ac97 = NULL;
1094}
1095
1096static int __devinit snd_cs4281_mixer(struct cs4281 * chip)
1097{
1098	struct snd_card *card = chip->card;
1099	struct snd_ac97_template ac97;
1100	int err;
1101	static struct snd_ac97_bus_ops ops = {
1102		.write = snd_cs4281_ac97_write,
1103		.read = snd_cs4281_ac97_read,
1104	};
1105
1106	if ((err = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus)) < 0)
1107		return err;
1108	chip->ac97_bus->private_free = snd_cs4281_mixer_free_ac97_bus;
1109
1110	memset(&ac97, 0, sizeof(ac97));
1111	ac97.private_data = chip;
1112	ac97.private_free = snd_cs4281_mixer_free_ac97;
1113	if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
1114		return err;
1115	if (chip->dual_codec) {
1116		ac97.num = 1;
1117		if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97_secondary)) < 0)
1118			return err;
1119	}
1120	if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4281_fm_vol, chip))) < 0)
1121		return err;
1122	if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4281_pcm_vol, chip))) < 0)
1123		return err;
1124	return 0;
1125}
1126
1127
1128/*
1129 * proc interface
1130 */
1131
1132static void snd_cs4281_proc_read(struct snd_info_entry *entry, 
1133				  struct snd_info_buffer *buffer)
1134{
1135	struct cs4281 *chip = entry->private_data;
1136
1137	snd_iprintf(buffer, "Cirrus Logic CS4281\n\n");
1138	snd_iprintf(buffer, "Spurious half IRQs   : %u\n", chip->spurious_dhtc_irq);
1139	snd_iprintf(buffer, "Spurious end IRQs    : %u\n", chip->spurious_dtc_irq);
1140}
1141
1142static ssize_t snd_cs4281_BA0_read(struct snd_info_entry *entry,
1143				   void *file_private_data,
1144				   struct file *file, char __user *buf,
1145				   size_t count, loff_t pos)
1146{
1147	struct cs4281 *chip = entry->private_data;
1148	
1149	if (copy_to_user_fromio(buf, chip->ba0 + pos, count))
1150		return -EFAULT;
1151	return count;
1152}
1153
1154static ssize_t snd_cs4281_BA1_read(struct snd_info_entry *entry,
1155				   void *file_private_data,
1156				   struct file *file, char __user *buf,
1157				   size_t count, loff_t pos)
1158{
1159	struct cs4281 *chip = entry->private_data;
1160	
1161	if (copy_to_user_fromio(buf, chip->ba1 + pos, count))
1162		return -EFAULT;
1163	return count;
1164}
1165
1166static struct snd_info_entry_ops snd_cs4281_proc_ops_BA0 = {
1167	.read = snd_cs4281_BA0_read,
1168};
1169
1170static struct snd_info_entry_ops snd_cs4281_proc_ops_BA1 = {
1171	.read = snd_cs4281_BA1_read,
1172};
1173
1174static void __devinit snd_cs4281_proc_init(struct cs4281 * chip)
1175{
1176	struct snd_info_entry *entry;
1177
1178	if (! snd_card_proc_new(chip->card, "cs4281", &entry))
1179		snd_info_set_text_ops(entry, chip, snd_cs4281_proc_read);
1180	if (! snd_card_proc_new(chip->card, "cs4281_BA0", &entry)) {
1181		entry->content = SNDRV_INFO_CONTENT_DATA;
1182		entry->private_data = chip;
1183		entry->c.ops = &snd_cs4281_proc_ops_BA0;
1184		entry->size = CS4281_BA0_SIZE;
1185	}
1186	if (! snd_card_proc_new(chip->card, "cs4281_BA1", &entry)) {
1187		entry->content = SNDRV_INFO_CONTENT_DATA;
1188		entry->private_data = chip;
1189		entry->c.ops = &snd_cs4281_proc_ops_BA1;
1190		entry->size = CS4281_BA1_SIZE;
1191	}
1192}
1193
1194/*
1195 * joystick support
1196 */
1197
1198#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
1199
1200static void snd_cs4281_gameport_trigger(struct gameport *gameport)
1201{
1202	struct cs4281 *chip = gameport_get_port_data(gameport);
1203
1204	if (snd_BUG_ON(!chip))
1205		return;
1206	snd_cs4281_pokeBA0(chip, BA0_JSPT, 0xff);
1207}
1208
1209static unsigned char snd_cs4281_gameport_read(struct gameport *gameport)
1210{
1211	struct cs4281 *chip = gameport_get_port_data(gameport);
1212
1213	if (snd_BUG_ON(!chip))
1214		return 0;
1215	return snd_cs4281_peekBA0(chip, BA0_JSPT);
1216}
1217
1218#ifdef COOKED_MODE
1219static int snd_cs4281_gameport_cooked_read(struct gameport *gameport,
1220					   int *axes, int *buttons)
1221{
1222	struct cs4281 *chip = gameport_get_port_data(gameport);
1223	unsigned js1, js2, jst;
1224	
1225	if (snd_BUG_ON(!chip))
1226		return 0;
1227
1228	js1 = snd_cs4281_peekBA0(chip, BA0_JSC1);
1229	js2 = snd_cs4281_peekBA0(chip, BA0_JSC2);
1230	jst = snd_cs4281_peekBA0(chip, BA0_JSPT);
1231	
1232	*buttons = (~jst >> 4) & 0x0F; 
1233	
1234	axes[0] = ((js1 & JSC1_Y1V_MASK) >> JSC1_Y1V_SHIFT) & 0xFFFF;
1235	axes[1] = ((js1 & JSC1_X1V_MASK) >> JSC1_X1V_SHIFT) & 0xFFFF;
1236	axes[2] = ((js2 & JSC2_Y2V_MASK) >> JSC2_Y2V_SHIFT) & 0xFFFF;
1237	axes[3] = ((js2 & JSC2_X2V_MASK) >> JSC2_X2V_SHIFT) & 0xFFFF;
1238
1239	for (jst = 0; jst < 4; ++jst)
1240		if (axes[jst] == 0xFFFF) axes[jst] = -1;
1241	return 0;
1242}
1243#else
1244#define snd_cs4281_gameport_cooked_read	NULL
1245#endif
1246
1247static int snd_cs4281_gameport_open(struct gameport *gameport, int mode)
1248{
1249	switch (mode) {
1250#ifdef COOKED_MODE
1251	case GAMEPORT_MODE_COOKED:
1252		return 0;
1253#endif
1254	case GAMEPORT_MODE_RAW:
1255		return 0;
1256	default:
1257		return -1;
1258	}
1259	return 0;
1260}
1261
1262static int __devinit snd_cs4281_create_gameport(struct cs4281 *chip)
1263{
1264	struct gameport *gp;
1265
1266	chip->gameport = gp = gameport_allocate_port();
1267	if (!gp) {
1268		printk(KERN_ERR "cs4281: cannot allocate memory for gameport\n");
 
1269		return -ENOMEM;
1270	}
1271
1272	gameport_set_name(gp, "CS4281 Gameport");
1273	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
1274	gameport_set_dev_parent(gp, &chip->pci->dev);
1275	gp->open = snd_cs4281_gameport_open;
1276	gp->read = snd_cs4281_gameport_read;
1277	gp->trigger = snd_cs4281_gameport_trigger;
1278	gp->cooked_read = snd_cs4281_gameport_cooked_read;
1279	gameport_set_port_data(gp, chip);
1280
1281	snd_cs4281_pokeBA0(chip, BA0_JSIO, 0xFF); // ?
1282	snd_cs4281_pokeBA0(chip, BA0_JSCTL, JSCTL_SP_MEDIUM_SLOW);
1283
1284	gameport_register_port(gp);
1285
1286	return 0;
1287}
1288
1289static void snd_cs4281_free_gameport(struct cs4281 *chip)
1290{
1291	if (chip->gameport) {
1292		gameport_unregister_port(chip->gameport);
1293		chip->gameport = NULL;
1294	}
1295}
1296#else
1297static inline int snd_cs4281_create_gameport(struct cs4281 *chip) { return -ENOSYS; }
1298static inline void snd_cs4281_free_gameport(struct cs4281 *chip) { }
1299#endif /* CONFIG_GAMEPORT || (MODULE && CONFIG_GAMEPORT_MODULE) */
1300
1301static int snd_cs4281_free(struct cs4281 *chip)
1302{
1303	snd_cs4281_free_gameport(chip);
1304
1305	if (chip->irq >= 0)
1306		synchronize_irq(chip->irq);
1307
1308	/* Mask interrupts */
1309	snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff);
1310	/* Stop the DLL Clock logic. */
1311	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1312	/* Sound System Power Management - Turn Everything OFF */
1313	snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
1314	/* PCI interface - D3 state */
1315	pci_set_power_state(chip->pci, 3);
1316
1317	if (chip->irq >= 0)
1318		free_irq(chip->irq, chip);
1319	if (chip->ba0)
1320		iounmap(chip->ba0);
1321	if (chip->ba1)
1322		iounmap(chip->ba1);
1323	pci_release_regions(chip->pci);
1324	pci_disable_device(chip->pci);
1325
1326	kfree(chip);
1327	return 0;
1328}
1329
1330static int snd_cs4281_dev_free(struct snd_device *device)
1331{
1332	struct cs4281 *chip = device->device_data;
1333	return snd_cs4281_free(chip);
1334}
1335
1336static int snd_cs4281_chip_init(struct cs4281 *chip); /* defined below */
1337
1338static int __devinit snd_cs4281_create(struct snd_card *card,
1339				       struct pci_dev *pci,
1340				       struct cs4281 ** rchip,
1341				       int dual_codec)
1342{
1343	struct cs4281 *chip;
1344	unsigned int tmp;
1345	int err;
1346	static struct snd_device_ops ops = {
1347		.dev_free =	snd_cs4281_dev_free,
1348	};
1349
1350	*rchip = NULL;
1351	if ((err = pci_enable_device(pci)) < 0)
1352		return err;
1353	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1354	if (chip == NULL) {
1355		pci_disable_device(pci);
1356		return -ENOMEM;
1357	}
1358	spin_lock_init(&chip->reg_lock);
1359	chip->card = card;
1360	chip->pci = pci;
1361	chip->irq = -1;
1362	pci_set_master(pci);
1363	if (dual_codec < 0 || dual_codec > 3) {
1364		snd_printk(KERN_ERR "invalid dual_codec option %d\n", dual_codec);
1365		dual_codec = 0;
1366	}
1367	chip->dual_codec = dual_codec;
1368
1369	if ((err = pci_request_regions(pci, "CS4281")) < 0) {
1370		kfree(chip);
1371		pci_disable_device(pci);
1372		return err;
1373	}
1374	chip->ba0_addr = pci_resource_start(pci, 0);
1375	chip->ba1_addr = pci_resource_start(pci, 1);
1376
1377	chip->ba0 = pci_ioremap_bar(pci, 0);
1378	chip->ba1 = pci_ioremap_bar(pci, 1);
1379	if (!chip->ba0 || !chip->ba1) {
1380		snd_cs4281_free(chip);
1381		return -ENOMEM;
1382	}
1383	
1384	if (request_irq(pci->irq, snd_cs4281_interrupt, IRQF_SHARED,
1385			KBUILD_MODNAME, chip)) {
1386		snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1387		snd_cs4281_free(chip);
1388		return -ENOMEM;
1389	}
1390	chip->irq = pci->irq;
 
1391
1392	tmp = snd_cs4281_chip_init(chip);
1393	if (tmp) {
1394		snd_cs4281_free(chip);
1395		return tmp;
1396	}
1397
1398	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1399		snd_cs4281_free(chip);
1400		return err;
1401	}
1402
1403	snd_cs4281_proc_init(chip);
1404
1405	snd_card_set_dev(card, &pci->dev);
1406
1407	*rchip = chip;
1408	return 0;
1409}
1410
1411static int snd_cs4281_chip_init(struct cs4281 *chip)
1412{
1413	unsigned int tmp;
1414	unsigned long end_time;
1415	int retry_count = 2;
1416
1417	/* Having EPPMC.FPDN=1 prevent proper chip initialisation */
1418	tmp = snd_cs4281_peekBA0(chip, BA0_EPPMC);
1419	if (tmp & BA0_EPPMC_FPDN)
1420		snd_cs4281_pokeBA0(chip, BA0_EPPMC, tmp & ~BA0_EPPMC_FPDN);
1421
1422      __retry:
1423	tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1424	if (tmp != BA0_CFLR_DEFAULT) {
1425		snd_cs4281_pokeBA0(chip, BA0_CFLR, BA0_CFLR_DEFAULT);
1426		tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1427		if (tmp != BA0_CFLR_DEFAULT) {
1428			snd_printk(KERN_ERR "CFLR setup failed (0x%x)\n", tmp);
 
1429			return -EIO;
1430		}
1431	}
1432
1433	/* Set the 'Configuration Write Protect' register
1434	 * to 4281h.  Allows vendor-defined configuration
1435         * space between 0e4h and 0ffh to be written. */	
1436	snd_cs4281_pokeBA0(chip, BA0_CWPR, 0x4281);
1437	
1438	if ((tmp = snd_cs4281_peekBA0(chip, BA0_SERC1)) != (BA0_SERC1_SO1EN | BA0_SERC1_AC97)) {
1439		snd_printk(KERN_ERR "SERC1 AC'97 check failed (0x%x)\n", tmp);
 
1440		return -EIO;
1441	}
1442	if ((tmp = snd_cs4281_peekBA0(chip, BA0_SERC2)) != (BA0_SERC2_SI1EN | BA0_SERC2_AC97)) {
1443		snd_printk(KERN_ERR "SERC2 AC'97 check failed (0x%x)\n", tmp);
 
1444		return -EIO;
1445	}
1446
1447	/* Sound System Power Management */
1448	snd_cs4281_pokeBA0(chip, BA0_SSPM, BA0_SSPM_MIXEN | BA0_SSPM_CSRCEN |
1449				           BA0_SSPM_PSRCEN | BA0_SSPM_JSEN |
1450				           BA0_SSPM_ACLEN | BA0_SSPM_FMEN);
1451
1452	/* Serial Port Power Management */
1453 	/* Blast the clock control register to zero so that the
1454         * PLL starts out in a known state, and blast the master serial
1455         * port control register to zero so that the serial ports also
1456         * start out in a known state. */
1457	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1458	snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
1459
1460        /* Make ESYN go to zero to turn off
1461         * the Sync pulse on the AC97 link. */
1462	snd_cs4281_pokeBA0(chip, BA0_ACCTL, 0);
1463	udelay(50);
1464                
1465	/*  Drive the ARST# pin low for a minimum of 1uS (as defined in the AC97
1466	 *  spec) and then drive it high.  This is done for non AC97 modes since
1467	 *  there might be logic external to the CS4281 that uses the ARST# line
1468	 *  for a reset. */
1469	snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
1470	udelay(50);
1471	snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN);
1472	msleep(50);
1473
1474	if (chip->dual_codec)
1475		snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN | BA0_SPMC_ASDI2E);
1476
1477	/*
1478	 *  Set the serial port timing configuration.
1479	 */
1480	snd_cs4281_pokeBA0(chip, BA0_SERMC,
1481			   (chip->dual_codec ? BA0_SERMC_TCID(chip->dual_codec) : BA0_SERMC_TCID(1)) |
1482			   BA0_SERMC_PTC_AC97 | BA0_SERMC_MSPE);
1483
1484	/*
1485	 *  Start the DLL Clock logic.
1486	 */
1487	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_DLLP);
1488	msleep(50);
1489	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_SWCE | BA0_CLKCR1_DLLP);
1490
1491	/*
1492	 * Wait for the DLL ready signal from the clock logic.
1493	 */
1494	end_time = jiffies + HZ;
1495	do {
1496		/*
1497		 *  Read the AC97 status register to see if we've seen a CODEC
1498		 *  signal from the AC97 codec.
1499		 */
1500		if (snd_cs4281_peekBA0(chip, BA0_CLKCR1) & BA0_CLKCR1_DLLRDY)
1501			goto __ok0;
1502		schedule_timeout_uninterruptible(1);
1503	} while (time_after_eq(end_time, jiffies));
1504
1505	snd_printk(KERN_ERR "DLLRDY not seen\n");
1506	return -EIO;
1507
1508      __ok0:
1509
1510	/*
1511	 *  The first thing we do here is to enable sync generation.  As soon
1512	 *  as we start receiving bit clock, we'll start producing the SYNC
1513	 *  signal.
1514	 */
1515	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_ESYN);
1516
1517	/*
1518	 * Wait for the codec ready signal from the AC97 codec.
1519	 */
1520	end_time = jiffies + HZ;
1521	do {
1522		/*
1523		 *  Read the AC97 status register to see if we've seen a CODEC
1524		 *  signal from the AC97 codec.
1525		 */
1526		if (snd_cs4281_peekBA0(chip, BA0_ACSTS) & BA0_ACSTS_CRDY)
1527			goto __ok1;
1528		schedule_timeout_uninterruptible(1);
1529	} while (time_after_eq(end_time, jiffies));
1530
1531	snd_printk(KERN_ERR "never read codec ready from AC'97 (0x%x)\n", snd_cs4281_peekBA0(chip, BA0_ACSTS));
 
 
1532	return -EIO;
1533
1534      __ok1:
1535	if (chip->dual_codec) {
1536		end_time = jiffies + HZ;
1537		do {
1538			if (snd_cs4281_peekBA0(chip, BA0_ACSTS2) & BA0_ACSTS_CRDY)
1539				goto __codec2_ok;
1540			schedule_timeout_uninterruptible(1);
1541		} while (time_after_eq(end_time, jiffies));
1542		snd_printk(KERN_INFO "secondary codec doesn't respond. disable it...\n");
 
1543		chip->dual_codec = 0;
1544	__codec2_ok: ;
1545	}
1546
1547	/*
1548	 *  Assert the valid frame signal so that we can start sending commands
1549	 *  to the AC97 codec.
1550	 */
1551
1552	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_VFRM | BA0_ACCTL_ESYN);
1553
1554	/*
1555	 *  Wait until we've sampled input slots 3 and 4 as valid, meaning that
1556	 *  the codec is pumping ADC data across the AC-link.
1557	 */
1558
1559	end_time = jiffies + HZ;
1560	do {
1561		/*
1562		 *  Read the input slot valid register and see if input slots 3
1563		 *  4 are valid yet.
1564		 */
1565                if ((snd_cs4281_peekBA0(chip, BA0_ACISV) & (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4))) == (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4)))
1566                        goto __ok2;
1567		schedule_timeout_uninterruptible(1);
1568	} while (time_after_eq(end_time, jiffies));
1569
1570	if (--retry_count > 0)
1571		goto __retry;
1572	snd_printk(KERN_ERR "never read ISV3 and ISV4 from AC'97\n");
1573	return -EIO;
1574
1575      __ok2:
1576
1577	/*
1578	 *  Now, assert valid frame and the slot 3 and 4 valid bits.  This will
1579	 *  commense the transfer of digital audio data to the AC97 codec.
1580	 */
1581	snd_cs4281_pokeBA0(chip, BA0_ACOSV, BA0_ACOSV_SLV(3) | BA0_ACOSV_SLV(4));
1582
1583	/*
1584	 *  Initialize DMA structures
1585	 */
1586	for (tmp = 0; tmp < 4; tmp++) {
1587		struct cs4281_dma *dma = &chip->dma[tmp];
1588		dma->regDBA = BA0_DBA0 + (tmp * 0x10);
1589		dma->regDCA = BA0_DCA0 + (tmp * 0x10);
1590		dma->regDBC = BA0_DBC0 + (tmp * 0x10);
1591		dma->regDCC = BA0_DCC0 + (tmp * 0x10);
1592		dma->regDMR = BA0_DMR0 + (tmp * 8);
1593		dma->regDCR = BA0_DCR0 + (tmp * 8);
1594		dma->regHDSR = BA0_HDSR0 + (tmp * 4);
1595		dma->regFCR = BA0_FCR0 + (tmp * 4);
1596		dma->regFSIC = BA0_FSIC0 + (tmp * 4);
1597		dma->fifo_offset = tmp * CS4281_FIFO_SIZE;
1598		snd_cs4281_pokeBA0(chip, dma->regFCR,
1599				   BA0_FCR_LS(31) |
1600				   BA0_FCR_RS(31) |
1601				   BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1602				   BA0_FCR_OF(dma->fifo_offset));
1603	}
1604
1605	chip->src_left_play_slot = 0;	/* AC'97 left PCM playback (3) */
1606	chip->src_right_play_slot = 1;	/* AC'97 right PCM playback (4) */
1607	chip->src_left_rec_slot = 10;	/* AC'97 left PCM record (3) */
1608	chip->src_right_rec_slot = 11;	/* AC'97 right PCM record (4) */
1609
1610	/* Activate wave playback FIFO for FM playback */
1611	chip->dma[0].valFCR = BA0_FCR_FEN | BA0_FCR_LS(0) |
1612		              BA0_FCR_RS(1) |
1613 	  	              BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1614		              BA0_FCR_OF(chip->dma[0].fifo_offset);
1615	snd_cs4281_pokeBA0(chip, chip->dma[0].regFCR, chip->dma[0].valFCR);
1616	snd_cs4281_pokeBA0(chip, BA0_SRCSA, (chip->src_left_play_slot << 0) |
1617					    (chip->src_right_play_slot << 8) |
1618					    (chip->src_left_rec_slot << 16) |
1619					    (chip->src_right_rec_slot << 24));
1620
1621	/* Initialize digital volume */
1622	snd_cs4281_pokeBA0(chip, BA0_PPLVC, 0);
1623	snd_cs4281_pokeBA0(chip, BA0_PPRVC, 0);
1624
1625	/* Enable IRQs */
1626	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1627	/* Unmask interrupts */
1628	snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff & ~(
1629					BA0_HISR_MIDI |
1630					BA0_HISR_DMAI |
1631					BA0_HISR_DMA(0) |
1632					BA0_HISR_DMA(1) |
1633					BA0_HISR_DMA(2) |
1634					BA0_HISR_DMA(3)));
1635	synchronize_irq(chip->irq);
1636
1637	return 0;
1638}
1639
1640/*
1641 *  MIDI section
1642 */
1643
1644static void snd_cs4281_midi_reset(struct cs4281 *chip)
1645{
1646	snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr | BA0_MIDCR_MRST);
1647	udelay(100);
1648	snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1649}
1650
1651static int snd_cs4281_midi_input_open(struct snd_rawmidi_substream *substream)
1652{
1653	struct cs4281 *chip = substream->rmidi->private_data;
1654
1655	spin_lock_irq(&chip->reg_lock);
1656 	chip->midcr |= BA0_MIDCR_RXE;
1657	chip->midi_input = substream;
1658	if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1659		snd_cs4281_midi_reset(chip);
1660	} else {
1661		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1662	}
1663	spin_unlock_irq(&chip->reg_lock);
1664	return 0;
1665}
1666
1667static int snd_cs4281_midi_input_close(struct snd_rawmidi_substream *substream)
1668{
1669	struct cs4281 *chip = substream->rmidi->private_data;
1670
1671	spin_lock_irq(&chip->reg_lock);
1672	chip->midcr &= ~(BA0_MIDCR_RXE | BA0_MIDCR_RIE);
1673	chip->midi_input = NULL;
1674	if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1675		snd_cs4281_midi_reset(chip);
1676	} else {
1677		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1678	}
1679	chip->uartm &= ~CS4281_MODE_INPUT;
1680	spin_unlock_irq(&chip->reg_lock);
1681	return 0;
1682}
1683
1684static int snd_cs4281_midi_output_open(struct snd_rawmidi_substream *substream)
1685{
1686	struct cs4281 *chip = substream->rmidi->private_data;
1687
1688	spin_lock_irq(&chip->reg_lock);
1689	chip->uartm |= CS4281_MODE_OUTPUT;
1690	chip->midcr |= BA0_MIDCR_TXE;
1691	chip->midi_output = substream;
1692	if (!(chip->uartm & CS4281_MODE_INPUT)) {
1693		snd_cs4281_midi_reset(chip);
1694	} else {
1695		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1696	}
1697	spin_unlock_irq(&chip->reg_lock);
1698	return 0;
1699}
1700
1701static int snd_cs4281_midi_output_close(struct snd_rawmidi_substream *substream)
1702{
1703	struct cs4281 *chip = substream->rmidi->private_data;
1704
1705	spin_lock_irq(&chip->reg_lock);
1706	chip->midcr &= ~(BA0_MIDCR_TXE | BA0_MIDCR_TIE);
1707	chip->midi_output = NULL;
1708	if (!(chip->uartm & CS4281_MODE_INPUT)) {
1709		snd_cs4281_midi_reset(chip);
1710	} else {
1711		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1712	}
1713	chip->uartm &= ~CS4281_MODE_OUTPUT;
1714	spin_unlock_irq(&chip->reg_lock);
1715	return 0;
1716}
1717
1718static void snd_cs4281_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1719{
1720	unsigned long flags;
1721	struct cs4281 *chip = substream->rmidi->private_data;
1722
1723	spin_lock_irqsave(&chip->reg_lock, flags);
1724	if (up) {
1725		if ((chip->midcr & BA0_MIDCR_RIE) == 0) {
1726			chip->midcr |= BA0_MIDCR_RIE;
1727			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1728		}
1729	} else {
1730		if (chip->midcr & BA0_MIDCR_RIE) {
1731			chip->midcr &= ~BA0_MIDCR_RIE;
1732			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1733		}
1734	}
1735	spin_unlock_irqrestore(&chip->reg_lock, flags);
1736}
1737
1738static void snd_cs4281_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1739{
1740	unsigned long flags;
1741	struct cs4281 *chip = substream->rmidi->private_data;
1742	unsigned char byte;
1743
1744	spin_lock_irqsave(&chip->reg_lock, flags);
1745	if (up) {
1746		if ((chip->midcr & BA0_MIDCR_TIE) == 0) {
1747			chip->midcr |= BA0_MIDCR_TIE;
1748			/* fill UART FIFO buffer at first, and turn Tx interrupts only if necessary */
1749			while ((chip->midcr & BA0_MIDCR_TIE) &&
1750			       (snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1751				if (snd_rawmidi_transmit(substream, &byte, 1) != 1) {
1752					chip->midcr &= ~BA0_MIDCR_TIE;
1753				} else {
1754					snd_cs4281_pokeBA0(chip, BA0_MIDWP, byte);
1755				}
1756			}
1757			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1758		}
1759	} else {
1760		if (chip->midcr & BA0_MIDCR_TIE) {
1761			chip->midcr &= ~BA0_MIDCR_TIE;
1762			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1763		}
1764	}
1765	spin_unlock_irqrestore(&chip->reg_lock, flags);
1766}
1767
1768static struct snd_rawmidi_ops snd_cs4281_midi_output =
1769{
1770	.open =		snd_cs4281_midi_output_open,
1771	.close =	snd_cs4281_midi_output_close,
1772	.trigger =	snd_cs4281_midi_output_trigger,
1773};
1774
1775static struct snd_rawmidi_ops snd_cs4281_midi_input =
1776{
1777	.open = 	snd_cs4281_midi_input_open,
1778	.close =	snd_cs4281_midi_input_close,
1779	.trigger =	snd_cs4281_midi_input_trigger,
1780};
1781
1782static int __devinit snd_cs4281_midi(struct cs4281 * chip, int device,
1783				     struct snd_rawmidi **rrawmidi)
1784{
1785	struct snd_rawmidi *rmidi;
1786	int err;
1787
1788	if (rrawmidi)
1789		*rrawmidi = NULL;
1790	if ((err = snd_rawmidi_new(chip->card, "CS4281", device, 1, 1, &rmidi)) < 0)
1791		return err;
1792	strcpy(rmidi->name, "CS4281");
1793	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_cs4281_midi_output);
1794	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_cs4281_midi_input);
1795	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
1796	rmidi->private_data = chip;
1797	chip->rmidi = rmidi;
1798	if (rrawmidi)
1799		*rrawmidi = rmidi;
1800	return 0;
1801}
1802
1803/*
1804 *  Interrupt handler
1805 */
1806
1807static irqreturn_t snd_cs4281_interrupt(int irq, void *dev_id)
1808{
1809	struct cs4281 *chip = dev_id;
1810	unsigned int status, dma, val;
1811	struct cs4281_dma *cdma;
1812
1813	if (chip == NULL)
1814		return IRQ_NONE;
1815	status = snd_cs4281_peekBA0(chip, BA0_HISR);
1816	if ((status & 0x7fffffff) == 0) {
1817		snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1818		return IRQ_NONE;
1819	}
1820
1821	if (status & (BA0_HISR_DMA(0)|BA0_HISR_DMA(1)|BA0_HISR_DMA(2)|BA0_HISR_DMA(3))) {
1822		for (dma = 0; dma < 4; dma++)
1823			if (status & BA0_HISR_DMA(dma)) {
1824				cdma = &chip->dma[dma];
1825				spin_lock(&chip->reg_lock);
1826				/* ack DMA IRQ */
1827				val = snd_cs4281_peekBA0(chip, cdma->regHDSR);
1828				/* workaround, sometimes CS4281 acknowledges */
1829				/* end or middle transfer position twice */
1830				cdma->frag++;
1831				if ((val & BA0_HDSR_DHTC) && !(cdma->frag & 1)) {
1832					cdma->frag--;
1833					chip->spurious_dhtc_irq++;
1834					spin_unlock(&chip->reg_lock);
1835					continue;
1836				}
1837				if ((val & BA0_HDSR_DTC) && (cdma->frag & 1)) {
1838					cdma->frag--;
1839					chip->spurious_dtc_irq++;
1840					spin_unlock(&chip->reg_lock);
1841					continue;
1842				}
1843				spin_unlock(&chip->reg_lock);
1844				snd_pcm_period_elapsed(cdma->substream);
1845			}
1846	}
1847
1848	if ((status & BA0_HISR_MIDI) && chip->rmidi) {
1849		unsigned char c;
1850		
1851		spin_lock(&chip->reg_lock);
1852		while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_RBE) == 0) {
1853			c = snd_cs4281_peekBA0(chip, BA0_MIDRP);
1854			if ((chip->midcr & BA0_MIDCR_RIE) == 0)
1855				continue;
1856			snd_rawmidi_receive(chip->midi_input, &c, 1);
1857		}
1858		while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1859			if ((chip->midcr & BA0_MIDCR_TIE) == 0)
1860				break;
1861			if (snd_rawmidi_transmit(chip->midi_output, &c, 1) != 1) {
1862				chip->midcr &= ~BA0_MIDCR_TIE;
1863				snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1864				break;
1865			}
1866			snd_cs4281_pokeBA0(chip, BA0_MIDWP, c);
1867		}
1868		spin_unlock(&chip->reg_lock);
1869	}
1870
1871	/* EOI to the PCI part... reenables interrupts */
1872	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1873
1874	return IRQ_HANDLED;
1875}
1876
1877
1878/*
1879 * OPL3 command
1880 */
1881static void snd_cs4281_opl3_command(struct snd_opl3 *opl3, unsigned short cmd,
1882				    unsigned char val)
1883{
1884	unsigned long flags;
1885	struct cs4281 *chip = opl3->private_data;
1886	void __iomem *port;
1887
1888	if (cmd & OPL3_RIGHT)
1889		port = chip->ba0 + BA0_B1AP; /* right port */
1890	else
1891		port = chip->ba0 + BA0_B0AP; /* left port */
1892
1893	spin_lock_irqsave(&opl3->reg_lock, flags);
1894
1895	writel((unsigned int)cmd, port);
1896	udelay(10);
1897
1898	writel((unsigned int)val, port + 4);
1899	udelay(30);
1900
1901	spin_unlock_irqrestore(&opl3->reg_lock, flags);
1902}
1903
1904static int __devinit snd_cs4281_probe(struct pci_dev *pci,
1905				      const struct pci_device_id *pci_id)
1906{
1907	static int dev;
1908	struct snd_card *card;
1909	struct cs4281 *chip;
1910	struct snd_opl3 *opl3;
1911	int err;
1912
1913        if (dev >= SNDRV_CARDS)
1914                return -ENODEV;
1915	if (!enable[dev]) {
1916		dev++;
1917		return -ENOENT;
1918	}
1919
1920	err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &card);
 
1921	if (err < 0)
1922		return err;
1923
1924	if ((err = snd_cs4281_create(card, pci, &chip, dual_codec[dev])) < 0) {
1925		snd_card_free(card);
1926		return err;
1927	}
1928	card->private_data = chip;
1929
1930	if ((err = snd_cs4281_mixer(chip)) < 0) {
1931		snd_card_free(card);
1932		return err;
1933	}
1934	if ((err = snd_cs4281_pcm(chip, 0, NULL)) < 0) {
1935		snd_card_free(card);
1936		return err;
1937	}
1938	if ((err = snd_cs4281_midi(chip, 0, NULL)) < 0) {
1939		snd_card_free(card);
1940		return err;
1941	}
1942	if ((err = snd_opl3_new(card, OPL3_HW_OPL3_CS4281, &opl3)) < 0) {
1943		snd_card_free(card);
1944		return err;
1945	}
1946	opl3->private_data = chip;
1947	opl3->command = snd_cs4281_opl3_command;
1948	snd_opl3_init(opl3);
1949	if ((err = snd_opl3_hwdep_new(opl3, 0, 1, NULL)) < 0) {
1950		snd_card_free(card);
1951		return err;
1952	}
1953	snd_cs4281_create_gameport(chip);
1954	strcpy(card->driver, "CS4281");
1955	strcpy(card->shortname, "Cirrus Logic CS4281");
1956	sprintf(card->longname, "%s at 0x%lx, irq %d",
1957		card->shortname,
1958		chip->ba0_addr,
1959		chip->irq);
1960
1961	if ((err = snd_card_register(card)) < 0) {
1962		snd_card_free(card);
1963		return err;
1964	}
1965
1966	pci_set_drvdata(pci, card);
1967	dev++;
1968	return 0;
1969}
1970
1971static void __devexit snd_cs4281_remove(struct pci_dev *pci)
1972{
1973	snd_card_free(pci_get_drvdata(pci));
1974	pci_set_drvdata(pci, NULL);
1975}
1976
1977/*
1978 * Power Management
1979 */
1980#ifdef CONFIG_PM
1981
1982static int saved_regs[SUSPEND_REGISTERS] = {
1983	BA0_JSCTL,
1984	BA0_GPIOR,
1985	BA0_SSCR,
1986	BA0_MIDCR,
1987	BA0_SRCSA,
1988	BA0_PASR,
1989	BA0_CASR,
1990	BA0_DACSR,
1991	BA0_ADCSR,
1992	BA0_FMLVC,
1993	BA0_FMRVC,
1994	BA0_PPLVC,
1995	BA0_PPRVC,
1996};
1997
1998#define CLKCR1_CKRA                             0x00010000L
1999
2000static int cs4281_suspend(struct pci_dev *pci, pm_message_t state)
2001{
2002	struct snd_card *card = pci_get_drvdata(pci);
2003	struct cs4281 *chip = card->private_data;
2004	u32 ulCLK;
2005	unsigned int i;
2006
2007	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
2008	snd_pcm_suspend_all(chip->pcm);
2009
2010	snd_ac97_suspend(chip->ac97);
2011	snd_ac97_suspend(chip->ac97_secondary);
2012
2013	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2014	ulCLK |= CLKCR1_CKRA;
2015	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2016
2017	/* Disable interrupts. */
2018	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_CHGM);
2019
2020	/* remember the status registers */
2021	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
2022		if (saved_regs[i])
2023			chip->suspend_regs[i] = snd_cs4281_peekBA0(chip, saved_regs[i]);
2024
2025	/* Turn off the serial ports. */
2026	snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
2027
2028	/* Power off FM, Joystick, AC link, */
2029	snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
2030
2031	/* DLL off. */
2032	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
2033
2034	/* AC link off. */
2035	snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
2036
2037	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2038	ulCLK &= ~CLKCR1_CKRA;
2039	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2040
2041	pci_disable_device(pci);
2042	pci_save_state(pci);
2043	pci_set_power_state(pci, pci_choose_state(pci, state));
2044	return 0;
2045}
2046
2047static int cs4281_resume(struct pci_dev *pci)
2048{
2049	struct snd_card *card = pci_get_drvdata(pci);
2050	struct cs4281 *chip = card->private_data;
2051	unsigned int i;
2052	u32 ulCLK;
2053
2054	pci_set_power_state(pci, PCI_D0);
2055	pci_restore_state(pci);
2056	if (pci_enable_device(pci) < 0) {
2057		printk(KERN_ERR "cs4281: pci_enable_device failed, "
2058		       "disabling device\n");
2059		snd_card_disconnect(card);
2060		return -EIO;
2061	}
2062	pci_set_master(pci);
2063
2064	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2065	ulCLK |= CLKCR1_CKRA;
2066	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2067
2068	snd_cs4281_chip_init(chip);
2069
2070	/* restore the status registers */
2071	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
2072		if (saved_regs[i])
2073			snd_cs4281_pokeBA0(chip, saved_regs[i], chip->suspend_regs[i]);
2074
2075	snd_ac97_resume(chip->ac97);
2076	snd_ac97_resume(chip->ac97_secondary);
2077
2078	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2079	ulCLK &= ~CLKCR1_CKRA;
2080	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2081
2082	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
2083	return 0;
2084}
2085#endif /* CONFIG_PM */
2086
2087static struct pci_driver driver = {
 
 
 
 
 
 
2088	.name = KBUILD_MODNAME,
2089	.id_table = snd_cs4281_ids,
2090	.probe = snd_cs4281_probe,
2091	.remove = __devexit_p(snd_cs4281_remove),
2092#ifdef CONFIG_PM
2093	.suspend = cs4281_suspend,
2094	.resume = cs4281_resume,
2095#endif
2096};
2097	
2098static int __init alsa_card_cs4281_init(void)
2099{
2100	return pci_register_driver(&driver);
2101}
2102
2103static void __exit alsa_card_cs4281_exit(void)
2104{
2105	pci_unregister_driver(&driver);
2106}
2107
2108module_init(alsa_card_cs4281_init)
2109module_exit(alsa_card_cs4281_exit)