1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  Driver for Cirrus Logic CS4281 based PCI soundcard
   4 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>,
   5 */
   6
   7#include <linux/io.h>
   8#include <linux/delay.h>
   9#include <linux/interrupt.h>
  10#include <linux/init.h>
  11#include <linux/pci.h>
  12#include <linux/slab.h>
  13#include <linux/gameport.h>
  14#include <linux/module.h>
  15#include <sound/core.h>
  16#include <sound/control.h>
  17#include <sound/pcm.h>
  18#include <sound/rawmidi.h>
  19#include <sound/ac97_codec.h>
  20#include <sound/tlv.h>
  21#include <sound/opl3.h>
  22#include <sound/initval.h>
  23
  24
  25MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  26MODULE_DESCRIPTION("Cirrus Logic CS4281");
  27MODULE_LICENSE("GPL");
  28
  29static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
  30static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
  31static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable switches */
  32static bool dual_codec[SNDRV_CARDS];	/* dual codec */
  33
  34module_param_array(index, int, NULL, 0444);
  35MODULE_PARM_DESC(index, "Index value for CS4281 soundcard.");
  36module_param_array(id, charp, NULL, 0444);
  37MODULE_PARM_DESC(id, "ID string for CS4281 soundcard.");
  38module_param_array(enable, bool, NULL, 0444);
  39MODULE_PARM_DESC(enable, "Enable CS4281 soundcard.");
  40module_param_array(dual_codec, bool, NULL, 0444);
  41MODULE_PARM_DESC(dual_codec, "Secondary Codec ID (0 = disabled).");
  42
  43/*
  44 *  Direct registers
  45 */
  46
  47#define CS4281_BA0_SIZE		0x1000
  48#define CS4281_BA1_SIZE		0x10000
  49
  50/*
  51 *  BA0 registers
  52 */
  53#define BA0_HISR		0x0000	/* Host Interrupt Status Register */
  54#define BA0_HISR_INTENA		(1<<31)	/* Internal Interrupt Enable Bit */
  55#define BA0_HISR_MIDI		(1<<22)	/* MIDI port interrupt */
  56#define BA0_HISR_FIFOI		(1<<20)	/* FIFO polled interrupt */
  57#define BA0_HISR_DMAI		(1<<18)	/* DMA interrupt (half or end) */
  58#define BA0_HISR_FIFO(c)	(1<<(12+(c))) /* FIFO channel interrupt */
  59#define BA0_HISR_DMA(c)		(1<<(8+(c)))  /* DMA channel interrupt */
  60#define BA0_HISR_GPPI		(1<<5)	/* General Purpose Input (Primary chip) */
  61#define BA0_HISR_GPSI		(1<<4)	/* General Purpose Input (Secondary chip) */
  62#define BA0_HISR_GP3I		(1<<3)	/* GPIO3 pin Interrupt */
  63#define BA0_HISR_GP1I		(1<<2)	/* GPIO1 pin Interrupt */
  64#define BA0_HISR_VUPI		(1<<1)	/* VOLUP pin Interrupt */
  65#define BA0_HISR_VDNI		(1<<0)	/* VOLDN pin Interrupt */
  66
  67#define BA0_HICR		0x0008	/* Host Interrupt Control Register */
  68#define BA0_HICR_CHGM		(1<<1)	/* INTENA Change Mask */
  69#define BA0_HICR_IEV		(1<<0)	/* INTENA Value */
  70#define BA0_HICR_EOI		(3<<0)	/* End of Interrupt command */
  71
  72#define BA0_HIMR		0x000c	/* Host Interrupt Mask Register */
  73					/* Use same contants as for BA0_HISR */
  74
  75#define BA0_IIER		0x0010	/* ISA Interrupt Enable Register */
  76
  77#define BA0_HDSR0		0x00f0	/* Host DMA Engine 0 Status Register */
  78#define BA0_HDSR1		0x00f4	/* Host DMA Engine 1 Status Register */
  79#define BA0_HDSR2		0x00f8	/* Host DMA Engine 2 Status Register */
  80#define BA0_HDSR3		0x00fc	/* Host DMA Engine 3 Status Register */
  81
  82#define BA0_HDSR_CH1P		(1<<25)	/* Channel 1 Pending */
  83#define BA0_HDSR_CH2P		(1<<24)	/* Channel 2 Pending */
  84#define BA0_HDSR_DHTC		(1<<17)	/* DMA Half Terminal Count */
  85#define BA0_HDSR_DTC		(1<<16)	/* DMA Terminal Count */
  86#define BA0_HDSR_DRUN		(1<<15)	/* DMA Running */
  87#define BA0_HDSR_RQ		(1<<7)	/* Pending Request */
  88
  89#define BA0_DCA0		0x0110	/* Host DMA Engine 0 Current Address */
  90#define BA0_DCC0		0x0114	/* Host DMA Engine 0 Current Count */
  91#define BA0_DBA0		0x0118	/* Host DMA Engine 0 Base Address */
  92#define BA0_DBC0		0x011c	/* Host DMA Engine 0 Base Count */
  93#define BA0_DCA1		0x0120	/* Host DMA Engine 1 Current Address */
  94#define BA0_DCC1		0x0124	/* Host DMA Engine 1 Current Count */
  95#define BA0_DBA1		0x0128	/* Host DMA Engine 1 Base Address */
  96#define BA0_DBC1		0x012c	/* Host DMA Engine 1 Base Count */
  97#define BA0_DCA2		0x0130	/* Host DMA Engine 2 Current Address */
  98#define BA0_DCC2		0x0134	/* Host DMA Engine 2 Current Count */
  99#define BA0_DBA2		0x0138	/* Host DMA Engine 2 Base Address */
 100#define BA0_DBC2		0x013c	/* Host DMA Engine 2 Base Count */
 101#define BA0_DCA3		0x0140	/* Host DMA Engine 3 Current Address */
 102#define BA0_DCC3		0x0144	/* Host DMA Engine 3 Current Count */
 103#define BA0_DBA3		0x0148	/* Host DMA Engine 3 Base Address */
 104#define BA0_DBC3		0x014c	/* Host DMA Engine 3 Base Count */
 105#define BA0_DMR0		0x0150	/* Host DMA Engine 0 Mode */
 106#define BA0_DCR0		0x0154	/* Host DMA Engine 0 Command */
 107#define BA0_DMR1		0x0158	/* Host DMA Engine 1 Mode */
 108#define BA0_DCR1		0x015c	/* Host DMA Engine 1 Command */
 109#define BA0_DMR2		0x0160	/* Host DMA Engine 2 Mode */
 110#define BA0_DCR2		0x0164	/* Host DMA Engine 2 Command */
 111#define BA0_DMR3		0x0168	/* Host DMA Engine 3 Mode */
 112#define BA0_DCR3		0x016c	/* Host DMA Engine 3 Command */
 113
 114#define BA0_DMR_DMA		(1<<29)	/* Enable DMA mode */
 115#define BA0_DMR_POLL		(1<<28)	/* Enable poll mode */
 116#define BA0_DMR_TBC		(1<<25)	/* Transfer By Channel */
 117#define BA0_DMR_CBC		(1<<24)	/* Count By Channel (0 = frame resolution) */
 118#define BA0_DMR_SWAPC		(1<<22)	/* Swap Left/Right Channels */
 119#define BA0_DMR_SIZE20		(1<<20)	/* Sample is 20-bit */
 120#define BA0_DMR_USIGN		(1<<19)	/* Unsigned */
 121#define BA0_DMR_BEND		(1<<18)	/* Big Endian */
 122#define BA0_DMR_MONO		(1<<17)	/* Mono */
 123#define BA0_DMR_SIZE8		(1<<16)	/* Sample is 8-bit */
 124#define BA0_DMR_TYPE_DEMAND	(0<<6)
 125#define BA0_DMR_TYPE_SINGLE	(1<<6)
 126#define BA0_DMR_TYPE_BLOCK	(2<<6)
 127#define BA0_DMR_TYPE_CASCADE	(3<<6)	/* Not supported */
 128#define BA0_DMR_DEC		(1<<5)	/* Access Increment (0) or Decrement (1) */
 129#define BA0_DMR_AUTO		(1<<4)	/* Auto-Initialize */
 130#define BA0_DMR_TR_VERIFY	(0<<2)	/* Verify Transfer */
 131#define BA0_DMR_TR_WRITE	(1<<2)	/* Write Transfer */
 132#define BA0_DMR_TR_READ		(2<<2)	/* Read Transfer */
 133
 134#define BA0_DCR_HTCIE		(1<<17)	/* Half Terminal Count Interrupt */
 135#define BA0_DCR_TCIE		(1<<16)	/* Terminal Count Interrupt */
 136#define BA0_DCR_MSK		(1<<0)	/* DMA Mask bit */
 137
 138#define BA0_FCR0		0x0180	/* FIFO Control 0 */
 139#define BA0_FCR1		0x0184	/* FIFO Control 1 */
 140#define BA0_FCR2		0x0188	/* FIFO Control 2 */
 141#define BA0_FCR3		0x018c	/* FIFO Control 3 */
 142
 143#define BA0_FCR_FEN		(1<<31)	/* FIFO Enable bit */
 144#define BA0_FCR_DACZ		(1<<30)	/* DAC Zero */
 145#define BA0_FCR_PSH		(1<<29)	/* Previous Sample Hold */
 146#define BA0_FCR_RS(x)		(((x)&0x1f)<<24) /* Right Slot Mapping */
 147#define BA0_FCR_LS(x)		(((x)&0x1f)<<16) /* Left Slot Mapping */
 148#define BA0_FCR_SZ(x)		(((x)&0x7f)<<8)	/* FIFO buffer size (in samples) */
 149#define BA0_FCR_OF(x)		(((x)&0x7f)<<0)	/* FIFO starting offset (in samples) */
 150
 151#define BA0_FPDR0		0x0190	/* FIFO Polled Data 0 */
 152#define BA0_FPDR1		0x0194	/* FIFO Polled Data 1 */
 153#define BA0_FPDR2		0x0198	/* FIFO Polled Data 2 */
 154#define BA0_FPDR3		0x019c	/* FIFO Polled Data 3 */
 155
 156#define BA0_FCHS		0x020c	/* FIFO Channel Status */
 157#define BA0_FCHS_RCO(x)		(1<<(7+(((x)&3)<<3))) /* Right Channel Out */
 158#define BA0_FCHS_LCO(x)		(1<<(6+(((x)&3)<<3))) /* Left Channel Out */
 159#define BA0_FCHS_MRP(x)		(1<<(5+(((x)&3)<<3))) /* Move Read Pointer */
 160#define BA0_FCHS_FE(x)		(1<<(4+(((x)&3)<<3))) /* FIFO Empty */
 161#define BA0_FCHS_FF(x)		(1<<(3+(((x)&3)<<3))) /* FIFO Full */
 162#define BA0_FCHS_IOR(x)		(1<<(2+(((x)&3)<<3))) /* Internal Overrun Flag */
 163#define BA0_FCHS_RCI(x)		(1<<(1+(((x)&3)<<3))) /* Right Channel In */
 164#define BA0_FCHS_LCI(x)		(1<<(0+(((x)&3)<<3))) /* Left Channel In */
 165
 166#define BA0_FSIC0		0x0210	/* FIFO Status and Interrupt Control 0 */
 167#define BA0_FSIC1		0x0214	/* FIFO Status and Interrupt Control 1 */
 168#define BA0_FSIC2		0x0218	/* FIFO Status and Interrupt Control 2 */
 169#define BA0_FSIC3		0x021c	/* FIFO Status and Interrupt Control 3 */
 170
 171#define BA0_FSIC_FIC(x)		(((x)&0x7f)<<24) /* FIFO Interrupt Count */
 172#define BA0_FSIC_FORIE		(1<<23) /* FIFO OverRun Interrupt Enable */
 173#define BA0_FSIC_FURIE		(1<<22) /* FIFO UnderRun Interrupt Enable */
 174#define BA0_FSIC_FSCIE		(1<<16)	/* FIFO Sample Count Interrupt Enable */
 175#define BA0_FSIC_FSC(x)		(((x)&0x7f)<<8) /* FIFO Sample Count */
 176#define BA0_FSIC_FOR		(1<<7)	/* FIFO OverRun */
 177#define BA0_FSIC_FUR		(1<<6)	/* FIFO UnderRun */
 178#define BA0_FSIC_FSCR		(1<<0)	/* FIFO Sample Count Reached */
 179
 180#define BA0_PMCS		0x0344	/* Power Management Control/Status */
 181#define BA0_CWPR		0x03e0	/* Configuration Write Protect */
 182
 183#define BA0_EPPMC		0x03e4	/* Extended PCI Power Management Control */
 184#define BA0_EPPMC_FPDN		(1<<14) /* Full Power DowN */
 185
 186#define BA0_GPIOR		0x03e8	/* GPIO Pin Interface Register */
 187
 188#define BA0_SPMC		0x03ec	/* Serial Port Power Management Control (& ASDIN2 enable) */
 189#define BA0_SPMC_GIPPEN		(1<<15)	/* GP INT Primary PME# Enable */
 190#define BA0_SPMC_GISPEN		(1<<14)	/* GP INT Secondary PME# Enable */
 191#define BA0_SPMC_EESPD		(1<<9)	/* EEPROM Serial Port Disable */
 192#define BA0_SPMC_ASDI2E		(1<<8)	/* ASDIN2 Enable */
 193#define BA0_SPMC_ASDO		(1<<7)	/* Asynchronous ASDOUT Assertion */
 194#define BA0_SPMC_WUP2		(1<<3)	/* Wakeup for Secondary Input */
 195#define BA0_SPMC_WUP1		(1<<2)	/* Wakeup for Primary Input */
 196#define BA0_SPMC_ASYNC		(1<<1)	/* Asynchronous ASYNC Assertion */
 197#define BA0_SPMC_RSTN		(1<<0)	/* Reset Not! */
 198
 199#define BA0_CFLR		0x03f0	/* Configuration Load Register (EEPROM or BIOS) */
 200#define BA0_CFLR_DEFAULT	0x00000001 /* CFLR must be in AC97 link mode */
 201#define BA0_IISR		0x03f4	/* ISA Interrupt Select */
 202#define BA0_TMS			0x03f8	/* Test Register */
 203#define BA0_SSVID		0x03fc	/* Subsystem ID register */
 204
 205#define BA0_CLKCR1		0x0400	/* Clock Control Register 1 */
 206#define BA0_CLKCR1_CLKON	(1<<25)	/* Read Only */
 207#define BA0_CLKCR1_DLLRDY	(1<<24)	/* DLL Ready */
 208#define BA0_CLKCR1_DLLOS	(1<<6)	/* DLL Output Select */
 209#define BA0_CLKCR1_SWCE		(1<<5)	/* Clock Enable */
 210#define BA0_CLKCR1_DLLP		(1<<4)	/* DLL PowerUp */
 211#define BA0_CLKCR1_DLLSS	(((x)&3)<<3) /* DLL Source Select */
 212
 213#define BA0_FRR			0x0410	/* Feature Reporting Register */
 214#define BA0_SLT12O		0x041c	/* Slot 12 GPIO Output Register for AC-Link */
 215
 216#define BA0_SERMC		0x0420	/* Serial Port Master Control */
 217#define BA0_SERMC_FCRN		(1<<27)	/* Force Codec Ready Not */
 218#define BA0_SERMC_ODSEN2	(1<<25)	/* On-Demand Support Enable ASDIN2 */
 219#define BA0_SERMC_ODSEN1	(1<<24)	/* On-Demand Support Enable ASDIN1 */
 220#define BA0_SERMC_SXLB		(1<<21)	/* ASDIN2 to ASDOUT Loopback */
 221#define BA0_SERMC_SLB		(1<<20)	/* ASDOUT to ASDIN2 Loopback */
 222#define BA0_SERMC_LOVF		(1<<19)	/* Loopback Output Valid Frame bit */
 223#define BA0_SERMC_TCID(x)	(((x)&3)<<16) /* Target Secondary Codec ID */
 224#define BA0_SERMC_PXLB		(5<<1)	/* Primary Port External Loopback */
 225#define BA0_SERMC_PLB		(4<<1)	/* Primary Port Internal Loopback */
 226#define BA0_SERMC_PTC		(7<<1)	/* Port Timing Configuration */
 227#define BA0_SERMC_PTC_AC97	(1<<1)	/* AC97 mode */
 228#define BA0_SERMC_MSPE		(1<<0)	/* Master Serial Port Enable */
 229
 230#define BA0_SERC1		0x0428	/* Serial Port Configuration 1 */
 231#define BA0_SERC1_SO1F(x)	(((x)&7)>>1) /* Primary Output Port Format */
 232#define BA0_SERC1_AC97		(1<<1)
 233#define BA0_SERC1_SO1EN		(1<<0)	/* Primary Output Port Enable */
 234
 235#define BA0_SERC2		0x042c	/* Serial Port Configuration 2 */
 236#define BA0_SERC2_SI1F(x)	(((x)&7)>>1) /* Primary Input Port Format */
 237#define BA0_SERC2_AC97		(1<<1)
 238#define BA0_SERC2_SI1EN		(1<<0)	/* Primary Input Port Enable */
 239
 240#define BA0_SLT12M		0x045c	/* Slot 12 Monitor Register for Primary AC-Link */
 241
 242#define BA0_ACCTL		0x0460	/* AC'97 Control */
 243#define BA0_ACCTL_TC		(1<<6)	/* Target Codec */
 244#define BA0_ACCTL_CRW		(1<<4)	/* 0=Write, 1=Read Command */
 245#define BA0_ACCTL_DCV		(1<<3)	/* Dynamic Command Valid */
 246#define BA0_ACCTL_VFRM		(1<<2)	/* Valid Frame */
 247#define BA0_ACCTL_ESYN		(1<<1)	/* Enable Sync */
 248
 249#define BA0_ACSTS		0x0464	/* AC'97 Status */
 250#define BA0_ACSTS_VSTS		(1<<1)	/* Valid Status */
 251#define BA0_ACSTS_CRDY		(1<<0)	/* Codec Ready */
 252
 253#define BA0_ACOSV		0x0468	/* AC'97 Output Slot Valid */
 254#define BA0_ACOSV_SLV(x)	(1<<((x)-3))
 255
 256#define BA0_ACCAD		0x046c	/* AC'97 Command Address */
 257#define BA0_ACCDA		0x0470	/* AC'97 Command Data */
 258
 259#define BA0_ACISV		0x0474	/* AC'97 Input Slot Valid */
 260#define BA0_ACISV_SLV(x)	(1<<((x)-3))
 261
 262#define BA0_ACSAD		0x0478	/* AC'97 Status Address */
 263#define BA0_ACSDA		0x047c	/* AC'97 Status Data */
 264#define BA0_JSPT		0x0480	/* Joystick poll/trigger */
 265#define BA0_JSCTL		0x0484	/* Joystick control */
 266#define BA0_JSC1		0x0488	/* Joystick control */
 267#define BA0_JSC2		0x048c	/* Joystick control */
 268#define BA0_JSIO		0x04a0
 269
 270#define BA0_MIDCR		0x0490	/* MIDI Control */
 271#define BA0_MIDCR_MRST		(1<<5)	/* Reset MIDI Interface */
 272#define BA0_MIDCR_MLB		(1<<4)	/* MIDI Loop Back Enable */
 273#define BA0_MIDCR_TIE		(1<<3)	/* MIDI Transmuit Interrupt Enable */
 274#define BA0_MIDCR_RIE		(1<<2)	/* MIDI Receive Interrupt Enable */
 275#define BA0_MIDCR_RXE		(1<<1)	/* MIDI Receive Enable */
 276#define BA0_MIDCR_TXE		(1<<0)	/* MIDI Transmit Enable */
 277
 278#define BA0_MIDCMD		0x0494	/* MIDI Command (wo) */
 279
 280#define BA0_MIDSR		0x0494	/* MIDI Status (ro) */
 281#define BA0_MIDSR_RDA		(1<<15)	/* Sticky bit (RBE 1->0) */
 282#define BA0_MIDSR_TBE		(1<<14) /* Sticky bit (TBF 0->1) */
 283#define BA0_MIDSR_RBE		(1<<7)	/* Receive Buffer Empty */
 284#define BA0_MIDSR_TBF		(1<<6)	/* Transmit Buffer Full */
 285
 286#define BA0_MIDWP		0x0498	/* MIDI Write */
 287#define BA0_MIDRP		0x049c	/* MIDI Read (ro) */
 288
 289#define BA0_AODSD1		0x04a8	/* AC'97 On-Demand Slot Disable for primary link (ro) */
 290#define BA0_AODSD1_NDS(x)	(1<<((x)-3))
 291
 292#define BA0_AODSD2		0x04ac	/* AC'97 On-Demand Slot Disable for secondary link (ro) */
 293#define BA0_AODSD2_NDS(x)	(1<<((x)-3))
 294
 295#define BA0_CFGI		0x04b0	/* Configure Interface (EEPROM interface) */
 296#define BA0_SLT12M2		0x04dc	/* Slot 12 Monitor Register 2 for secondary AC-link */
 297#define BA0_ACSTS2		0x04e4	/* AC'97 Status Register 2 */
 298#define BA0_ACISV2		0x04f4	/* AC'97 Input Slot Valid Register 2 */
 299#define BA0_ACSAD2		0x04f8	/* AC'97 Status Address Register 2 */
 300#define BA0_ACSDA2		0x04fc	/* AC'97 Status Data Register 2 */
 301#define BA0_FMSR		0x0730	/* FM Synthesis Status (ro) */
 302#define BA0_B0AP		0x0730	/* FM Bank 0 Address Port (wo) */
 303#define BA0_FMDP		0x0734	/* FM Data Port */
 304#define BA0_B1AP		0x0738	/* FM Bank 1 Address Port */
 305#define BA0_B1DP		0x073c	/* FM Bank 1 Data Port */
 306
 307#define BA0_SSPM		0x0740	/* Sound System Power Management */
 308#define BA0_SSPM_MIXEN		(1<<6)	/* Playback SRC + FM/Wavetable MIX */
 309#define BA0_SSPM_CSRCEN		(1<<5)	/* Capture Sample Rate Converter Enable */
 310#define BA0_SSPM_PSRCEN		(1<<4)	/* Playback Sample Rate Converter Enable */
 311#define BA0_SSPM_JSEN		(1<<3)	/* Joystick Enable */
 312#define BA0_SSPM_ACLEN		(1<<2)	/* Serial Port Engine and AC-Link Enable */
 313#define BA0_SSPM_FMEN		(1<<1)	/* FM Synthesis Block Enable */
 314
 315#define BA0_DACSR		0x0744	/* DAC Sample Rate - Playback SRC */
 316#define BA0_ADCSR		0x0748	/* ADC Sample Rate - Capture SRC */
 317
 318#define BA0_SSCR		0x074c	/* Sound System Control Register */
 319#define BA0_SSCR_HVS1		(1<<23)	/* Hardwave Volume Step (0=1,1=2) */
 320#define BA0_SSCR_MVCS		(1<<19)	/* Master Volume Codec Select */
 321#define BA0_SSCR_MVLD		(1<<18)	/* Master Volume Line Out Disable */
 322#define BA0_SSCR_MVAD		(1<<17)	/* Master Volume Alternate Out Disable */
 323#define BA0_SSCR_MVMD		(1<<16)	/* Master Volume Mono Out Disable */
 324#define BA0_SSCR_XLPSRC		(1<<8)	/* External SRC Loopback Mode */
 325#define BA0_SSCR_LPSRC		(1<<7)	/* SRC Loopback Mode */
 326#define BA0_SSCR_CDTX		(1<<5)	/* CD Transfer Data */
 327#define BA0_SSCR_HVC		(1<<3)	/* Harware Volume Control Enable */
 328
 329#define BA0_FMLVC		0x0754	/* FM Synthesis Left Volume Control */
 330#define BA0_FMRVC		0x0758	/* FM Synthesis Right Volume Control */
 331#define BA0_SRCSA		0x075c	/* SRC Slot Assignments */
 332#define BA0_PPLVC		0x0760	/* PCM Playback Left Volume Control */
 333#define BA0_PPRVC		0x0764	/* PCM Playback Right Volume Control */
 334#define BA0_PASR		0x0768	/* playback sample rate */
 335#define BA0_CASR		0x076C	/* capture sample rate */
 336
 337/* Source Slot Numbers - Playback */
 338#define SRCSLOT_LEFT_PCM_PLAYBACK		0
 339#define SRCSLOT_RIGHT_PCM_PLAYBACK		1
 340#define SRCSLOT_PHONE_LINE_1_DAC		2
 341#define SRCSLOT_CENTER_PCM_PLAYBACK		3
 342#define SRCSLOT_LEFT_SURROUND_PCM_PLAYBACK	4
 343#define SRCSLOT_RIGHT_SURROUND_PCM_PLAYBACK	5
 344#define SRCSLOT_LFE_PCM_PLAYBACK		6
 345#define SRCSLOT_PHONE_LINE_2_DAC		7
 346#define SRCSLOT_HEADSET_DAC			8
 347#define SRCSLOT_LEFT_WT				29  /* invalid for BA0_SRCSA */
 348#define SRCSLOT_RIGHT_WT			30  /* invalid for BA0_SRCSA */
 349
 350/* Source Slot Numbers - Capture */
 351#define SRCSLOT_LEFT_PCM_RECORD			10
 352#define SRCSLOT_RIGHT_PCM_RECORD		11
 353#define SRCSLOT_PHONE_LINE_1_ADC		12
 354#define SRCSLOT_MIC_ADC				13
 355#define SRCSLOT_PHONE_LINE_2_ADC		17
 356#define SRCSLOT_HEADSET_ADC			18
 357#define SRCSLOT_SECONDARY_LEFT_PCM_RECORD	20
 358#define SRCSLOT_SECONDARY_RIGHT_PCM_RECORD	21
 359#define SRCSLOT_SECONDARY_PHONE_LINE_1_ADC	22
 360#define SRCSLOT_SECONDARY_MIC_ADC		23
 361#define SRCSLOT_SECONDARY_PHONE_LINE_2_ADC	27
 362#define SRCSLOT_SECONDARY_HEADSET_ADC		28
 363
 364/* Source Slot Numbers - Others */
 365#define SRCSLOT_POWER_DOWN			31
 366
 367/* MIDI modes */
 368#define CS4281_MODE_OUTPUT		(1<<0)
 369#define CS4281_MODE_INPUT		(1<<1)
 370
 371/* joystick bits */
 372/* Bits for JSPT */
 373#define JSPT_CAX                                0x00000001
 374#define JSPT_CAY                                0x00000002
 375#define JSPT_CBX                                0x00000004
 376#define JSPT_CBY                                0x00000008
 377#define JSPT_BA1                                0x00000010
 378#define JSPT_BA2                                0x00000020
 379#define JSPT_BB1                                0x00000040
 380#define JSPT_BB2                                0x00000080
 381
 382/* Bits for JSCTL */
 383#define JSCTL_SP_MASK                           0x00000003
 384#define JSCTL_SP_SLOW                           0x00000000
 385#define JSCTL_SP_MEDIUM_SLOW                    0x00000001
 386#define JSCTL_SP_MEDIUM_FAST                    0x00000002
 387#define JSCTL_SP_FAST                           0x00000003
 388#define JSCTL_ARE                               0x00000004
 389
 390/* Data register pairs masks */
 391#define JSC1_Y1V_MASK                           0x0000FFFF
 392#define JSC1_X1V_MASK                           0xFFFF0000
 393#define JSC1_Y1V_SHIFT                          0
 394#define JSC1_X1V_SHIFT                          16
 395#define JSC2_Y2V_MASK                           0x0000FFFF
 396#define JSC2_X2V_MASK                           0xFFFF0000
 397#define JSC2_Y2V_SHIFT                          0
 398#define JSC2_X2V_SHIFT                          16
 399
 400/* JS GPIO */
 401#define JSIO_DAX                                0x00000001
 402#define JSIO_DAY                                0x00000002
 403#define JSIO_DBX                                0x00000004
 404#define JSIO_DBY                                0x00000008
 405#define JSIO_AXOE                               0x00000010
 406#define JSIO_AYOE                               0x00000020
 407#define JSIO_BXOE                               0x00000040
 408#define JSIO_BYOE                               0x00000080
 409
 410/*
 411 *
 412 */
 413
 414struct cs4281_dma {
 415	struct snd_pcm_substream *substream;
 416	unsigned int regDBA;		/* offset to DBA register */
 417	unsigned int regDCA;		/* offset to DCA register */
 418	unsigned int regDBC;		/* offset to DBC register */
 419	unsigned int regDCC;		/* offset to DCC register */
 420	unsigned int regDMR;		/* offset to DMR register */
 421	unsigned int regDCR;		/* offset to DCR register */
 422	unsigned int regHDSR;		/* offset to HDSR register */
 423	unsigned int regFCR;		/* offset to FCR register */
 424	unsigned int regFSIC;		/* offset to FSIC register */
 425	unsigned int valDMR;		/* DMA mode */
 426	unsigned int valDCR;		/* DMA command */
 427	unsigned int valFCR;		/* FIFO control */
 428	unsigned int fifo_offset;	/* FIFO offset within BA1 */
 429	unsigned char left_slot;	/* FIFO left slot */
 430	unsigned char right_slot;	/* FIFO right slot */
 431	int frag;			/* period number */
 432};
 433
 434#define SUSPEND_REGISTERS	20
 435
 436struct cs4281 {
 437	int irq;
 438
 439	void __iomem *ba0;		/* virtual (accessible) address */
 440	void __iomem *ba1;		/* virtual (accessible) address */
 441	unsigned long ba0_addr;
 442	unsigned long ba1_addr;
 443
 444	int dual_codec;
 445
 446	struct snd_ac97_bus *ac97_bus;
 447	struct snd_ac97 *ac97;
 448	struct snd_ac97 *ac97_secondary;
 449
 450	struct pci_dev *pci;
 451	struct snd_card *card;
 452	struct snd_pcm *pcm;
 453	struct snd_rawmidi *rmidi;
 454	struct snd_rawmidi_substream *midi_input;
 455	struct snd_rawmidi_substream *midi_output;
 456
 457	struct cs4281_dma dma[4];
 458
 459	unsigned char src_left_play_slot;
 460	unsigned char src_right_play_slot;
 461	unsigned char src_left_rec_slot;
 462	unsigned char src_right_rec_slot;
 463
 464	unsigned int spurious_dhtc_irq;
 465	unsigned int spurious_dtc_irq;
 466
 467	spinlock_t reg_lock;
 468	unsigned int midcr;
 469	unsigned int uartm;
 470
 471	struct gameport *gameport;
 472
 473#ifdef CONFIG_PM_SLEEP
 474	u32 suspend_regs[SUSPEND_REGISTERS];
 475#endif
 476
 477};
 478
 479static irqreturn_t snd_cs4281_interrupt(int irq, void *dev_id);
 480
 481static const struct pci_device_id snd_cs4281_ids[] = {
 482	{ PCI_VDEVICE(CIRRUS, 0x6005), 0, },	/* CS4281 */
 483	{ 0, }
 484};
 485
 486MODULE_DEVICE_TABLE(pci, snd_cs4281_ids);
 487
 488/*
 489 *  constants
 490 */
 491
 492#define CS4281_FIFO_SIZE	32
 493
 494/*
 495 *  common I/O routines
 496 */
 497
 498static inline void snd_cs4281_pokeBA0(struct cs4281 *chip, unsigned long offset,
 499				      unsigned int val)
 500{
 501        writel(val, chip->ba0 + offset);
 502}
 503
 504static inline unsigned int snd_cs4281_peekBA0(struct cs4281 *chip, unsigned long offset)
 505{
 506        return readl(chip->ba0 + offset);
 507}
 508
 509static void snd_cs4281_ac97_write(struct snd_ac97 *ac97,
 510				  unsigned short reg, unsigned short val)
 511{
 512	/*
 513	 *  1. Write ACCAD = Command Address Register = 46Ch for AC97 register address
 514	 *  2. Write ACCDA = Command Data Register = 470h    for data to write to AC97
 515	 *  3. Write ACCTL = Control Register = 460h for initiating the write
 516	 *  4. Read ACCTL = 460h, DCV should be reset by now and 460h = 07h
 517	 *  5. if DCV not cleared, break and return error
 518	 */
 519	struct cs4281 *chip = ac97->private_data;
 520	int count;
 521
 522	/*
 523	 *  Setup the AC97 control registers on the CS461x to send the
 524	 *  appropriate command to the AC97 to perform the read.
 525	 *  ACCAD = Command Address Register = 46Ch
 526	 *  ACCDA = Command Data Register = 470h
 527	 *  ACCTL = Control Register = 460h
 528	 *  set DCV - will clear when process completed
 529	 *  reset CRW - Write command
 530	 *  set VFRM - valid frame enabled
 531	 *  set ESYN - ASYNC generation enabled
 532	 *  set RSTN - ARST# inactive, AC97 codec not reset
 533         */
 534	snd_cs4281_pokeBA0(chip, BA0_ACCAD, reg);
 535	snd_cs4281_pokeBA0(chip, BA0_ACCDA, val);
 536	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_DCV | BA0_ACCTL_VFRM |
 537				            BA0_ACCTL_ESYN | (ac97->num ? BA0_ACCTL_TC : 0));
 538	for (count = 0; count < 2000; count++) {
 539		/*
 540		 *  First, we want to wait for a short time.
 541		 */
 542		udelay(10);
 543		/*
 544		 *  Now, check to see if the write has completed.
 545		 *  ACCTL = 460h, DCV should be reset by now and 460h = 07h
 546		 */
 547		if (!(snd_cs4281_peekBA0(chip, BA0_ACCTL) & BA0_ACCTL_DCV)) {
 548			return;
 549		}
 550	}
 551	dev_err(chip->card->dev,
 552		"AC'97 write problem, reg = 0x%x, val = 0x%x\n", reg, val);
 553}
 554
 555static unsigned short snd_cs4281_ac97_read(struct snd_ac97 *ac97,
 556					   unsigned short reg)
 557{
 558	struct cs4281 *chip = ac97->private_data;
 559	int count;
 560	unsigned short result;
 561	// FIXME: volatile is necessary in the following due to a bug of
 562	// some gcc versions
 563	volatile int ac97_num = ((volatile struct snd_ac97 *)ac97)->num;
 564
 565	/*
 566	 *  1. Write ACCAD = Command Address Register = 46Ch for AC97 register address
 567	 *  2. Write ACCDA = Command Data Register = 470h    for data to write to AC97 
 568	 *  3. Write ACCTL = Control Register = 460h for initiating the write
 569	 *  4. Read ACCTL = 460h, DCV should be reset by now and 460h = 17h
 570	 *  5. if DCV not cleared, break and return error
 571	 *  6. Read ACSTS = Status Register = 464h, check VSTS bit
 572	 */
 573
 574	snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSDA2 : BA0_ACSDA);
 575
 576	/*
 577	 *  Setup the AC97 control registers on the CS461x to send the
 578	 *  appropriate command to the AC97 to perform the read.
 579	 *  ACCAD = Command Address Register = 46Ch
 580	 *  ACCDA = Command Data Register = 470h
 581	 *  ACCTL = Control Register = 460h
 582	 *  set DCV - will clear when process completed
 583	 *  set CRW - Read command
 584	 *  set VFRM - valid frame enabled
 585	 *  set ESYN - ASYNC generation enabled
 586	 *  set RSTN - ARST# inactive, AC97 codec not reset
 587	 */
 588
 589	snd_cs4281_pokeBA0(chip, BA0_ACCAD, reg);
 590	snd_cs4281_pokeBA0(chip, BA0_ACCDA, 0);
 591	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_DCV | BA0_ACCTL_CRW |
 592					    BA0_ACCTL_VFRM | BA0_ACCTL_ESYN |
 593			   (ac97_num ? BA0_ACCTL_TC : 0));
 594
 595
 596	/*
 597	 *  Wait for the read to occur.
 598	 */
 599	for (count = 0; count < 500; count++) {
 600		/*
 601		 *  First, we want to wait for a short time.
 602	 	 */
 603		udelay(10);
 604		/*
 605		 *  Now, check to see if the read has completed.
 606		 *  ACCTL = 460h, DCV should be reset by now and 460h = 17h
 607		 */
 608		if (!(snd_cs4281_peekBA0(chip, BA0_ACCTL) & BA0_ACCTL_DCV))
 609			goto __ok1;
 610	}
 611
 612	dev_err(chip->card->dev,
 613		"AC'97 read problem (ACCTL_DCV), reg = 0x%x\n", reg);
 614	result = 0xffff;
 615	goto __end;
 616	
 617      __ok1:
 618	/*
 619	 *  Wait for the valid status bit to go active.
 620	 */
 621	for (count = 0; count < 100; count++) {
 622		/*
 623		 *  Read the AC97 status register.
 624		 *  ACSTS = Status Register = 464h
 625		 *  VSTS - Valid Status
 626		 */
 627		if (snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSTS2 : BA0_ACSTS) & BA0_ACSTS_VSTS)
 628			goto __ok2;
 629		udelay(10);
 630	}
 631	
 632	dev_err(chip->card->dev,
 633		"AC'97 read problem (ACSTS_VSTS), reg = 0x%x\n", reg);
 634	result = 0xffff;
 635	goto __end;
 636
 637      __ok2:
 638	/*
 639	 *  Read the data returned from the AC97 register.
 640	 *  ACSDA = Status Data Register = 474h
 641	 */
 642	result = snd_cs4281_peekBA0(chip, ac97_num ? BA0_ACSDA2 : BA0_ACSDA);
 643
 644      __end:
 645	return result;
 646}
 647
 648/*
 649 *  PCM part
 650 */
 651
 652static int snd_cs4281_trigger(struct snd_pcm_substream *substream, int cmd)
 653{
 654	struct cs4281_dma *dma = substream->runtime->private_data;
 655	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 656
 657	spin_lock(&chip->reg_lock);
 658	switch (cmd) {
 659	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 660		dma->valDCR |= BA0_DCR_MSK;
 661		dma->valFCR |= BA0_FCR_FEN;
 662		break;
 663	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 664		dma->valDCR &= ~BA0_DCR_MSK;
 665		dma->valFCR &= ~BA0_FCR_FEN;
 666		break;
 667	case SNDRV_PCM_TRIGGER_START:
 668	case SNDRV_PCM_TRIGGER_RESUME:
 669		snd_cs4281_pokeBA0(chip, dma->regDMR, dma->valDMR & ~BA0_DMR_DMA);
 670		dma->valDMR |= BA0_DMR_DMA;
 671		dma->valDCR &= ~BA0_DCR_MSK;
 672		dma->valFCR |= BA0_FCR_FEN;
 673		break;
 674	case SNDRV_PCM_TRIGGER_STOP:
 675	case SNDRV_PCM_TRIGGER_SUSPEND:
 676		dma->valDMR &= ~(BA0_DMR_DMA|BA0_DMR_POLL);
 677		dma->valDCR |= BA0_DCR_MSK;
 678		dma->valFCR &= ~BA0_FCR_FEN;
 679		/* Leave wave playback FIFO enabled for FM */
 680		if (dma->regFCR != BA0_FCR0)
 681			dma->valFCR &= ~BA0_FCR_FEN;
 682		break;
 683	default:
 684		spin_unlock(&chip->reg_lock);
 685		return -EINVAL;
 686	}
 687	snd_cs4281_pokeBA0(chip, dma->regDMR, dma->valDMR);
 688	snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR);
 689	snd_cs4281_pokeBA0(chip, dma->regDCR, dma->valDCR);
 690	spin_unlock(&chip->reg_lock);
 691	return 0;
 692}
 693
 694static unsigned int snd_cs4281_rate(unsigned int rate, unsigned int *real_rate)
 695{
 696	unsigned int val;
 697	
 698	if (real_rate)
 699		*real_rate = rate;
 700	/* special "hardcoded" rates */
 701	switch (rate) {
 702	case 8000:	return 5;
 703	case 11025:	return 4;
 704	case 16000:	return 3;
 705	case 22050:	return 2;
 706	case 44100:	return 1;
 707	case 48000:	return 0;
 708	default:
 709		break;
 710	}
 711	val = 1536000 / rate;
 712	if (real_rate)
 713		*real_rate = 1536000 / val;
 714	return val;
 715}
 716
 717static void snd_cs4281_mode(struct cs4281 *chip, struct cs4281_dma *dma,
 718			    struct snd_pcm_runtime *runtime,
 719			    int capture, int src)
 720{
 721	int rec_mono;
 722
 723	dma->valDMR = BA0_DMR_TYPE_SINGLE | BA0_DMR_AUTO |
 724		      (capture ? BA0_DMR_TR_WRITE : BA0_DMR_TR_READ);
 725	if (runtime->channels == 1)
 726		dma->valDMR |= BA0_DMR_MONO;
 727	if (snd_pcm_format_unsigned(runtime->format) > 0)
 728		dma->valDMR |= BA0_DMR_USIGN;
 729	if (snd_pcm_format_big_endian(runtime->format) > 0)
 730		dma->valDMR |= BA0_DMR_BEND;
 731	switch (snd_pcm_format_width(runtime->format)) {
 732	case 8: dma->valDMR |= BA0_DMR_SIZE8;
 733		if (runtime->channels == 1)
 734			dma->valDMR |= BA0_DMR_SWAPC;
 735		break;
 736	case 32: dma->valDMR |= BA0_DMR_SIZE20; break;
 737	}
 738	dma->frag = 0;	/* for workaround */
 739	dma->valDCR = BA0_DCR_TCIE | BA0_DCR_MSK;
 740	if (runtime->buffer_size != runtime->period_size)
 741		dma->valDCR |= BA0_DCR_HTCIE;
 742	/* Initialize DMA */
 743	snd_cs4281_pokeBA0(chip, dma->regDBA, runtime->dma_addr);
 744	snd_cs4281_pokeBA0(chip, dma->regDBC, runtime->buffer_size - 1);
 745	rec_mono = (chip->dma[1].valDMR & BA0_DMR_MONO) == BA0_DMR_MONO;
 746	snd_cs4281_pokeBA0(chip, BA0_SRCSA, (chip->src_left_play_slot << 0) |
 747					    (chip->src_right_play_slot << 8) |
 748					    (chip->src_left_rec_slot << 16) |
 749					    ((rec_mono ? 31 : chip->src_right_rec_slot) << 24));
 750	if (!src)
 751		goto __skip_src;
 752	if (!capture) {
 753		if (dma->left_slot == chip->src_left_play_slot) {
 754			unsigned int val = snd_cs4281_rate(runtime->rate, NULL);
 755			snd_BUG_ON(dma->right_slot != chip->src_right_play_slot);
 756			snd_cs4281_pokeBA0(chip, BA0_DACSR, val);
 757		}
 758	} else {
 759		if (dma->left_slot == chip->src_left_rec_slot) {
 760			unsigned int val = snd_cs4281_rate(runtime->rate, NULL);
 761			snd_BUG_ON(dma->right_slot != chip->src_right_rec_slot);
 762			snd_cs4281_pokeBA0(chip, BA0_ADCSR, val);
 763		}
 764	}
 765      __skip_src:
 766	/* Deactivate wave playback FIFO before changing slot assignments */
 767	if (dma->regFCR == BA0_FCR0)
 768		snd_cs4281_pokeBA0(chip, dma->regFCR, snd_cs4281_peekBA0(chip, dma->regFCR) & ~BA0_FCR_FEN);
 769	/* Initialize FIFO */
 770	dma->valFCR = BA0_FCR_LS(dma->left_slot) |
 771		      BA0_FCR_RS(capture && (dma->valDMR & BA0_DMR_MONO) ? 31 : dma->right_slot) |
 772		      BA0_FCR_SZ(CS4281_FIFO_SIZE) |
 773		      BA0_FCR_OF(dma->fifo_offset);
 774	snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR | (capture ? BA0_FCR_PSH : 0));
 775	/* Activate FIFO again for FM playback */
 776	if (dma->regFCR == BA0_FCR0)
 777		snd_cs4281_pokeBA0(chip, dma->regFCR, dma->valFCR | BA0_FCR_FEN);
 778	/* Clear FIFO Status and Interrupt Control Register */
 779	snd_cs4281_pokeBA0(chip, dma->regFSIC, 0);
 780}
 781
 782static int snd_cs4281_playback_prepare(struct snd_pcm_substream *substream)
 783{
 784	struct snd_pcm_runtime *runtime = substream->runtime;
 785	struct cs4281_dma *dma = runtime->private_data;
 786	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 787
 788	spin_lock_irq(&chip->reg_lock);
 789	snd_cs4281_mode(chip, dma, runtime, 0, 1);
 790	spin_unlock_irq(&chip->reg_lock);
 791	return 0;
 792}
 793
 794static int snd_cs4281_capture_prepare(struct snd_pcm_substream *substream)
 795{
 796	struct snd_pcm_runtime *runtime = substream->runtime;
 797	struct cs4281_dma *dma = runtime->private_data;
 798	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 799
 800	spin_lock_irq(&chip->reg_lock);
 801	snd_cs4281_mode(chip, dma, runtime, 1, 1);
 802	spin_unlock_irq(&chip->reg_lock);
 803	return 0;
 804}
 805
 806static snd_pcm_uframes_t snd_cs4281_pointer(struct snd_pcm_substream *substream)
 807{
 808	struct snd_pcm_runtime *runtime = substream->runtime;
 809	struct cs4281_dma *dma = runtime->private_data;
 810	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 811
 812	/*
 813	dev_dbg(chip->card->dev,
 814		"DCC = 0x%x, buffer_size = 0x%x, jiffies = %li\n",
 815		snd_cs4281_peekBA0(chip, dma->regDCC), runtime->buffer_size,
 816	       jiffies);
 817	*/
 818	return runtime->buffer_size -
 819	       snd_cs4281_peekBA0(chip, dma->regDCC) - 1;
 820}
 821
 822static const struct snd_pcm_hardware snd_cs4281_playback =
 823{
 824	.info =			SNDRV_PCM_INFO_MMAP |
 825				SNDRV_PCM_INFO_INTERLEAVED |
 826				SNDRV_PCM_INFO_MMAP_VALID |
 827				SNDRV_PCM_INFO_PAUSE |
 828				SNDRV_PCM_INFO_RESUME,
 829	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
 830				SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
 831				SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
 832				SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
 833				SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE,
 834	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 835	.rate_min =		4000,
 836	.rate_max =		48000,
 837	.channels_min =		1,
 838	.channels_max =		2,
 839	.buffer_bytes_max =	(512*1024),
 840	.period_bytes_min =	64,
 841	.period_bytes_max =	(512*1024),
 842	.periods_min =		1,
 843	.periods_max =		2,
 844	.fifo_size =		CS4281_FIFO_SIZE,
 845};
 846
 847static const struct snd_pcm_hardware snd_cs4281_capture =
 848{
 849	.info =			SNDRV_PCM_INFO_MMAP |
 850				SNDRV_PCM_INFO_INTERLEAVED |
 851				SNDRV_PCM_INFO_MMAP_VALID |
 852				SNDRV_PCM_INFO_PAUSE |
 853				SNDRV_PCM_INFO_RESUME,
 854	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S8 |
 855				SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_S16_LE |
 856				SNDRV_PCM_FMTBIT_U16_BE | SNDRV_PCM_FMTBIT_S16_BE |
 857				SNDRV_PCM_FMTBIT_U32_LE | SNDRV_PCM_FMTBIT_S32_LE |
 858				SNDRV_PCM_FMTBIT_U32_BE | SNDRV_PCM_FMTBIT_S32_BE,
 859	.rates =		SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
 860	.rate_min =		4000,
 861	.rate_max =		48000,
 862	.channels_min =		1,
 863	.channels_max =		2,
 864	.buffer_bytes_max =	(512*1024),
 865	.period_bytes_min =	64,
 866	.period_bytes_max =	(512*1024),
 867	.periods_min =		1,
 868	.periods_max =		2,
 869	.fifo_size =		CS4281_FIFO_SIZE,
 870};
 871
 872static int snd_cs4281_playback_open(struct snd_pcm_substream *substream)
 873{
 874	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 875	struct snd_pcm_runtime *runtime = substream->runtime;
 876	struct cs4281_dma *dma;
 877
 878	dma = &chip->dma[0];
 879	dma->substream = substream;
 880	dma->left_slot = 0;
 881	dma->right_slot = 1;
 882	runtime->private_data = dma;
 883	runtime->hw = snd_cs4281_playback;
 884	/* should be detected from the AC'97 layer, but it seems
 885	   that although CS4297A rev B reports 18-bit ADC resolution,
 886	   samples are 20-bit */
 887	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 20);
 888	return 0;
 889}
 890
 891static int snd_cs4281_capture_open(struct snd_pcm_substream *substream)
 892{
 893	struct cs4281 *chip = snd_pcm_substream_chip(substream);
 894	struct snd_pcm_runtime *runtime = substream->runtime;
 895	struct cs4281_dma *dma;
 896
 897	dma = &chip->dma[1];
 898	dma->substream = substream;
 899	dma->left_slot = 10;
 900	dma->right_slot = 11;
 901	runtime->private_data = dma;
 902	runtime->hw = snd_cs4281_capture;
 903	/* should be detected from the AC'97 layer, but it seems
 904	   that although CS4297A rev B reports 18-bit ADC resolution,
 905	   samples are 20-bit */
 906	snd_pcm_hw_constraint_msbits(runtime, 0, 32, 20);
 907	return 0;
 908}
 909
 910static int snd_cs4281_playback_close(struct snd_pcm_substream *substream)
 911{
 912	struct cs4281_dma *dma = substream->runtime->private_data;
 913
 914	dma->substream = NULL;
 915	return 0;
 916}
 917
 918static int snd_cs4281_capture_close(struct snd_pcm_substream *substream)
 919{
 920	struct cs4281_dma *dma = substream->runtime->private_data;
 921
 922	dma->substream = NULL;
 923	return 0;
 924}
 925
 926static const struct snd_pcm_ops snd_cs4281_playback_ops = {
 927	.open =		snd_cs4281_playback_open,
 928	.close =	snd_cs4281_playback_close,
 929	.prepare =	snd_cs4281_playback_prepare,
 930	.trigger =	snd_cs4281_trigger,
 931	.pointer =	snd_cs4281_pointer,
 932};
 933
 934static const struct snd_pcm_ops snd_cs4281_capture_ops = {
 935	.open =		snd_cs4281_capture_open,
 936	.close =	snd_cs4281_capture_close,
 937	.prepare =	snd_cs4281_capture_prepare,
 938	.trigger =	snd_cs4281_trigger,
 939	.pointer =	snd_cs4281_pointer,
 940};
 941
 942static int snd_cs4281_pcm(struct cs4281 *chip, int device)
 943{
 944	struct snd_pcm *pcm;
 945	int err;
 946
 947	err = snd_pcm_new(chip->card, "CS4281", device, 1, 1, &pcm);
 948	if (err < 0)
 949		return err;
 950
 951	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_cs4281_playback_ops);
 952	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cs4281_capture_ops);
 953
 954	pcm->private_data = chip;
 955	pcm->info_flags = 0;
 956	strcpy(pcm->name, "CS4281");
 957	chip->pcm = pcm;
 958
 959	snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
 960				       64*1024, 512*1024);
 961
 962	return 0;
 963}
 964
 965/*
 966 *  Mixer section
 967 */
 968
 969#define CS_VOL_MASK	0x1f
 970
 971static int snd_cs4281_info_volume(struct snd_kcontrol *kcontrol,
 972				  struct snd_ctl_elem_info *uinfo)
 973{
 974	uinfo->type              = SNDRV_CTL_ELEM_TYPE_INTEGER;
 975	uinfo->count             = 2;
 976	uinfo->value.integer.min = 0;
 977	uinfo->value.integer.max = CS_VOL_MASK;
 978	return 0;
 979}
 980 
 981static int snd_cs4281_get_volume(struct snd_kcontrol *kcontrol,
 982				 struct snd_ctl_elem_value *ucontrol)
 983{
 984	struct cs4281 *chip = snd_kcontrol_chip(kcontrol);
 985	int regL = (kcontrol->private_value >> 16) & 0xffff;
 986	int regR = kcontrol->private_value & 0xffff;
 987	int volL, volR;
 988
 989	volL = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regL) & CS_VOL_MASK);
 990	volR = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regR) & CS_VOL_MASK);
 991
 992	ucontrol->value.integer.value[0] = volL;
 993	ucontrol->value.integer.value[1] = volR;
 994	return 0;
 995}
 996
 997static int snd_cs4281_put_volume(struct snd_kcontrol *kcontrol,
 998				 struct snd_ctl_elem_value *ucontrol)
 999{
1000	struct cs4281 *chip = snd_kcontrol_chip(kcontrol);
1001	int change = 0;
1002	int regL = (kcontrol->private_value >> 16) & 0xffff;
1003	int regR = kcontrol->private_value & 0xffff;
1004	int volL, volR;
1005
1006	volL = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regL) & CS_VOL_MASK);
1007	volR = CS_VOL_MASK - (snd_cs4281_peekBA0(chip, regR) & CS_VOL_MASK);
1008
1009	if (ucontrol->value.integer.value[0] != volL) {
1010		volL = CS_VOL_MASK - (ucontrol->value.integer.value[0] & CS_VOL_MASK);
1011		snd_cs4281_pokeBA0(chip, regL, volL);
1012		change = 1;
1013	}
1014	if (ucontrol->value.integer.value[1] != volR) {
1015		volR = CS_VOL_MASK - (ucontrol->value.integer.value[1] & CS_VOL_MASK);
1016		snd_cs4281_pokeBA0(chip, regR, volR);
1017		change = 1;
1018	}
1019	return change;
1020}
1021
1022static const DECLARE_TLV_DB_SCALE(db_scale_dsp, -4650, 150, 0);
1023
1024static const struct snd_kcontrol_new snd_cs4281_fm_vol =
1025{
1026	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1027	.name = "Synth Playback Volume",
1028	.info = snd_cs4281_info_volume, 
1029	.get = snd_cs4281_get_volume,
1030	.put = snd_cs4281_put_volume, 
1031	.private_value = ((BA0_FMLVC << 16) | BA0_FMRVC),
1032	.tlv = { .p = db_scale_dsp },
1033};
1034
1035static const struct snd_kcontrol_new snd_cs4281_pcm_vol =
1036{
1037	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
1038	.name = "PCM Stream Playback Volume",
1039	.info = snd_cs4281_info_volume, 
1040	.get = snd_cs4281_get_volume,
1041	.put = snd_cs4281_put_volume, 
1042	.private_value = ((BA0_PPLVC << 16) | BA0_PPRVC),
1043	.tlv = { .p = db_scale_dsp },
1044};
1045
1046static void snd_cs4281_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
1047{
1048	struct cs4281 *chip = bus->private_data;
1049	chip->ac97_bus = NULL;
1050}
1051
1052static void snd_cs4281_mixer_free_ac97(struct snd_ac97 *ac97)
1053{
1054	struct cs4281 *chip = ac97->private_data;
1055	if (ac97->num)
1056		chip->ac97_secondary = NULL;
1057	else
1058		chip->ac97 = NULL;
1059}
1060
1061static int snd_cs4281_mixer(struct cs4281 *chip)
1062{
1063	struct snd_card *card = chip->card;
1064	struct snd_ac97_template ac97;
1065	int err;
1066	static const struct snd_ac97_bus_ops ops = {
1067		.write = snd_cs4281_ac97_write,
1068		.read = snd_cs4281_ac97_read,
1069	};
1070
1071	err = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus);
1072	if (err < 0)
1073		return err;
1074	chip->ac97_bus->private_free = snd_cs4281_mixer_free_ac97_bus;
1075
1076	memset(&ac97, 0, sizeof(ac97));
1077	ac97.private_data = chip;
1078	ac97.private_free = snd_cs4281_mixer_free_ac97;
1079	err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
1080	if (err < 0)
1081		return err;
1082	if (chip->dual_codec) {
1083		ac97.num = 1;
1084		err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97_secondary);
1085		if (err < 0)
1086			return err;
1087	}
1088	err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4281_fm_vol, chip));
1089	if (err < 0)
1090		return err;
1091	err = snd_ctl_add(card, snd_ctl_new1(&snd_cs4281_pcm_vol, chip));
1092	if (err < 0)
1093		return err;
1094	return 0;
1095}
1096
1097
1098/*
1099 * proc interface
1100 */
1101
1102static void snd_cs4281_proc_read(struct snd_info_entry *entry, 
1103				  struct snd_info_buffer *buffer)
1104{
1105	struct cs4281 *chip = entry->private_data;
1106
1107	snd_iprintf(buffer, "Cirrus Logic CS4281\n\n");
1108	snd_iprintf(buffer, "Spurious half IRQs   : %u\n", chip->spurious_dhtc_irq);
1109	snd_iprintf(buffer, "Spurious end IRQs    : %u\n", chip->spurious_dtc_irq);
1110}
1111
1112static ssize_t snd_cs4281_BA0_read(struct snd_info_entry *entry,
1113				   void *file_private_data,
1114				   struct file *file, char __user *buf,
1115				   size_t count, loff_t pos)
1116{
1117	struct cs4281 *chip = entry->private_data;
1118	
1119	if (copy_to_user_fromio(buf, chip->ba0 + pos, count))
1120		return -EFAULT;
1121	return count;
1122}
1123
1124static ssize_t snd_cs4281_BA1_read(struct snd_info_entry *entry,
1125				   void *file_private_data,
1126				   struct file *file, char __user *buf,
1127				   size_t count, loff_t pos)
1128{
1129	struct cs4281 *chip = entry->private_data;
1130	
1131	if (copy_to_user_fromio(buf, chip->ba1 + pos, count))
1132		return -EFAULT;
1133	return count;
1134}
1135
1136static const struct snd_info_entry_ops snd_cs4281_proc_ops_BA0 = {
1137	.read = snd_cs4281_BA0_read,
1138};
1139
1140static const struct snd_info_entry_ops snd_cs4281_proc_ops_BA1 = {
1141	.read = snd_cs4281_BA1_read,
1142};
1143
1144static void snd_cs4281_proc_init(struct cs4281 *chip)
1145{
1146	struct snd_info_entry *entry;
1147
1148	snd_card_ro_proc_new(chip->card, "cs4281", chip, snd_cs4281_proc_read);
1149	if (! snd_card_proc_new(chip->card, "cs4281_BA0", &entry)) {
1150		entry->content = SNDRV_INFO_CONTENT_DATA;
1151		entry->private_data = chip;
1152		entry->c.ops = &snd_cs4281_proc_ops_BA0;
1153		entry->size = CS4281_BA0_SIZE;
1154	}
1155	if (! snd_card_proc_new(chip->card, "cs4281_BA1", &entry)) {
1156		entry->content = SNDRV_INFO_CONTENT_DATA;
1157		entry->private_data = chip;
1158		entry->c.ops = &snd_cs4281_proc_ops_BA1;
1159		entry->size = CS4281_BA1_SIZE;
1160	}
1161}
1162
1163/*
1164 * joystick support
1165 */
1166
1167#if IS_REACHABLE(CONFIG_GAMEPORT)
1168
1169static void snd_cs4281_gameport_trigger(struct gameport *gameport)
1170{
1171	struct cs4281 *chip = gameport_get_port_data(gameport);
1172
1173	if (snd_BUG_ON(!chip))
1174		return;
1175	snd_cs4281_pokeBA0(chip, BA0_JSPT, 0xff);
1176}
1177
1178static unsigned char snd_cs4281_gameport_read(struct gameport *gameport)
1179{
1180	struct cs4281 *chip = gameport_get_port_data(gameport);
1181
1182	if (snd_BUG_ON(!chip))
1183		return 0;
1184	return snd_cs4281_peekBA0(chip, BA0_JSPT);
1185}
1186
1187#ifdef COOKED_MODE
1188static int snd_cs4281_gameport_cooked_read(struct gameport *gameport,
1189					   int *axes, int *buttons)
1190{
1191	struct cs4281 *chip = gameport_get_port_data(gameport);
1192	unsigned js1, js2, jst;
1193	
1194	if (snd_BUG_ON(!chip))
1195		return 0;
1196
1197	js1 = snd_cs4281_peekBA0(chip, BA0_JSC1);
1198	js2 = snd_cs4281_peekBA0(chip, BA0_JSC2);
1199	jst = snd_cs4281_peekBA0(chip, BA0_JSPT);
1200	
1201	*buttons = (~jst >> 4) & 0x0F; 
1202	
1203	axes[0] = ((js1 & JSC1_Y1V_MASK) >> JSC1_Y1V_SHIFT) & 0xFFFF;
1204	axes[1] = ((js1 & JSC1_X1V_MASK) >> JSC1_X1V_SHIFT) & 0xFFFF;
1205	axes[2] = ((js2 & JSC2_Y2V_MASK) >> JSC2_Y2V_SHIFT) & 0xFFFF;
1206	axes[3] = ((js2 & JSC2_X2V_MASK) >> JSC2_X2V_SHIFT) & 0xFFFF;
1207
1208	for (jst = 0; jst < 4; ++jst)
1209		if (axes[jst] == 0xFFFF) axes[jst] = -1;
1210	return 0;
1211}
1212#else
1213#define snd_cs4281_gameport_cooked_read	NULL
1214#endif
1215
1216static int snd_cs4281_gameport_open(struct gameport *gameport, int mode)
1217{
1218	switch (mode) {
1219#ifdef COOKED_MODE
1220	case GAMEPORT_MODE_COOKED:
1221		return 0;
1222#endif
1223	case GAMEPORT_MODE_RAW:
1224		return 0;
1225	default:
1226		return -1;
1227	}
1228	return 0;
1229}
1230
1231static int snd_cs4281_create_gameport(struct cs4281 *chip)
1232{
1233	struct gameport *gp;
1234
1235	chip->gameport = gp = gameport_allocate_port();
1236	if (!gp) {
1237		dev_err(chip->card->dev,
1238			"cannot allocate memory for gameport\n");
1239		return -ENOMEM;
1240	}
1241
1242	gameport_set_name(gp, "CS4281 Gameport");
1243	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
1244	gameport_set_dev_parent(gp, &chip->pci->dev);
1245	gp->open = snd_cs4281_gameport_open;
1246	gp->read = snd_cs4281_gameport_read;
1247	gp->trigger = snd_cs4281_gameport_trigger;
1248	gp->cooked_read = snd_cs4281_gameport_cooked_read;
1249	gameport_set_port_data(gp, chip);
1250
1251	snd_cs4281_pokeBA0(chip, BA0_JSIO, 0xFF); // ?
1252	snd_cs4281_pokeBA0(chip, BA0_JSCTL, JSCTL_SP_MEDIUM_SLOW);
1253
1254	gameport_register_port(gp);
1255
1256	return 0;
1257}
1258
1259static void snd_cs4281_free_gameport(struct cs4281 *chip)
1260{
1261	if (chip->gameport) {
1262		gameport_unregister_port(chip->gameport);
1263		chip->gameport = NULL;
1264	}
1265}
1266#else
1267static inline int snd_cs4281_create_gameport(struct cs4281 *chip) { return -ENOSYS; }
1268static inline void snd_cs4281_free_gameport(struct cs4281 *chip) { }
1269#endif /* IS_REACHABLE(CONFIG_GAMEPORT) */
1270
1271static int snd_cs4281_free(struct cs4281 *chip)
1272{
 
 
1273	snd_cs4281_free_gameport(chip);
1274
1275	/* Mask interrupts */
1276	snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff);
1277	/* Stop the DLL Clock logic. */
1278	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1279	/* Sound System Power Management - Turn Everything OFF */
1280	snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
1281	/* PCI interface - D3 state */
1282	pci_set_power_state(chip->pci, PCI_D3hot);
1283
1284	if (chip->irq >= 0)
1285		free_irq(chip->irq, chip);
1286	iounmap(chip->ba0);
1287	iounmap(chip->ba1);
1288	pci_release_regions(chip->pci);
1289	pci_disable_device(chip->pci);
1290
1291	kfree(chip);
1292	return 0;
1293}
1294
1295static int snd_cs4281_dev_free(struct snd_device *device)
1296{
1297	struct cs4281 *chip = device->device_data;
1298	return snd_cs4281_free(chip);
1299}
1300
1301static int snd_cs4281_chip_init(struct cs4281 *chip); /* defined below */
1302
1303static int snd_cs4281_create(struct snd_card *card,
1304			     struct pci_dev *pci,
1305			     struct cs4281 **rchip,
1306			     int dual_codec)
1307{
1308	struct cs4281 *chip;
1309	unsigned int tmp;
1310	int err;
1311	static const struct snd_device_ops ops = {
1312		.dev_free =	snd_cs4281_dev_free,
1313	};
1314
1315	*rchip = NULL;
1316	err = pci_enable_device(pci);
1317	if (err < 0)
1318		return err;
1319	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1320	if (chip == NULL) {
1321		pci_disable_device(pci);
1322		return -ENOMEM;
1323	}
1324	spin_lock_init(&chip->reg_lock);
1325	chip->card = card;
1326	chip->pci = pci;
1327	chip->irq = -1;
1328	pci_set_master(pci);
1329	if (dual_codec < 0 || dual_codec > 3) {
1330		dev_err(card->dev, "invalid dual_codec option %d\n", dual_codec);
1331		dual_codec = 0;
1332	}
1333	chip->dual_codec = dual_codec;
1334
1335	err = pci_request_regions(pci, "CS4281");
1336	if (err < 0) {
1337		kfree(chip);
1338		pci_disable_device(pci);
1339		return err;
1340	}
1341	chip->ba0_addr = pci_resource_start(pci, 0);
1342	chip->ba1_addr = pci_resource_start(pci, 1);
1343
1344	chip->ba0 = pci_ioremap_bar(pci, 0);
1345	chip->ba1 = pci_ioremap_bar(pci, 1);
1346	if (!chip->ba0 || !chip->ba1) {
1347		snd_cs4281_free(chip);
1348		return -ENOMEM;
1349	}
1350	
1351	if (request_irq(pci->irq, snd_cs4281_interrupt, IRQF_SHARED,
1352			KBUILD_MODNAME, chip)) {
1353		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1354		snd_cs4281_free(chip);
1355		return -ENOMEM;
1356	}
1357	chip->irq = pci->irq;
1358	card->sync_irq = chip->irq;
 
1359
1360	tmp = snd_cs4281_chip_init(chip);
1361	if (tmp) {
1362		snd_cs4281_free(chip);
1363		return tmp;
1364	}
1365
1366	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
1367	if (err < 0) {
1368		snd_cs4281_free(chip);
1369		return err;
1370	}
1371
1372	snd_cs4281_proc_init(chip);
1373
1374	*rchip = chip;
1375	return 0;
1376}
1377
1378static int snd_cs4281_chip_init(struct cs4281 *chip)
1379{
1380	unsigned int tmp;
1381	unsigned long end_time;
1382	int retry_count = 2;
1383
1384	/* Having EPPMC.FPDN=1 prevent proper chip initialisation */
1385	tmp = snd_cs4281_peekBA0(chip, BA0_EPPMC);
1386	if (tmp & BA0_EPPMC_FPDN)
1387		snd_cs4281_pokeBA0(chip, BA0_EPPMC, tmp & ~BA0_EPPMC_FPDN);
1388
1389      __retry:
1390	tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1391	if (tmp != BA0_CFLR_DEFAULT) {
1392		snd_cs4281_pokeBA0(chip, BA0_CFLR, BA0_CFLR_DEFAULT);
1393		tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1394		if (tmp != BA0_CFLR_DEFAULT) {
1395			dev_err(chip->card->dev,
1396				"CFLR setup failed (0x%x)\n", tmp);
1397			return -EIO;
1398		}
1399	}
1400
1401	/* Set the 'Configuration Write Protect' register
1402	 * to 4281h.  Allows vendor-defined configuration
1403         * space between 0e4h and 0ffh to be written. */	
1404	snd_cs4281_pokeBA0(chip, BA0_CWPR, 0x4281);
1405	
1406	tmp = snd_cs4281_peekBA0(chip, BA0_SERC1);
1407	if (tmp != (BA0_SERC1_SO1EN | BA0_SERC1_AC97)) {
1408		dev_err(chip->card->dev,
1409			"SERC1 AC'97 check failed (0x%x)\n", tmp);
1410		return -EIO;
1411	}
1412	tmp = snd_cs4281_peekBA0(chip, BA0_SERC2);
1413	if (tmp != (BA0_SERC2_SI1EN | BA0_SERC2_AC97)) {
1414		dev_err(chip->card->dev,
1415			"SERC2 AC'97 check failed (0x%x)\n", tmp);
1416		return -EIO;
1417	}
1418
1419	/* Sound System Power Management */
1420	snd_cs4281_pokeBA0(chip, BA0_SSPM, BA0_SSPM_MIXEN | BA0_SSPM_CSRCEN |
1421				           BA0_SSPM_PSRCEN | BA0_SSPM_JSEN |
1422				           BA0_SSPM_ACLEN | BA0_SSPM_FMEN);
1423
1424	/* Serial Port Power Management */
1425 	/* Blast the clock control register to zero so that the
1426         * PLL starts out in a known state, and blast the master serial
1427         * port control register to zero so that the serial ports also
1428         * start out in a known state. */
1429	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1430	snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
1431
1432        /* Make ESYN go to zero to turn off
1433         * the Sync pulse on the AC97 link. */
1434	snd_cs4281_pokeBA0(chip, BA0_ACCTL, 0);
1435	udelay(50);
1436                
1437	/*  Drive the ARST# pin low for a minimum of 1uS (as defined in the AC97
1438	 *  spec) and then drive it high.  This is done for non AC97 modes since
1439	 *  there might be logic external to the CS4281 that uses the ARST# line
1440	 *  for a reset. */
1441	snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
1442	udelay(50);
1443	snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN);
1444	msleep(50);
1445
1446	if (chip->dual_codec)
1447		snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN | BA0_SPMC_ASDI2E);
1448
1449	/*
1450	 *  Set the serial port timing configuration.
1451	 */
1452	snd_cs4281_pokeBA0(chip, BA0_SERMC,
1453			   (chip->dual_codec ? BA0_SERMC_TCID(chip->dual_codec) : BA0_SERMC_TCID(1)) |
1454			   BA0_SERMC_PTC_AC97 | BA0_SERMC_MSPE);
1455
1456	/*
1457	 *  Start the DLL Clock logic.
1458	 */
1459	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_DLLP);
1460	msleep(50);
1461	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_SWCE | BA0_CLKCR1_DLLP);
1462
1463	/*
1464	 * Wait for the DLL ready signal from the clock logic.
1465	 */
1466	end_time = jiffies + HZ;
1467	do {
1468		/*
1469		 *  Read the AC97 status register to see if we've seen a CODEC
1470		 *  signal from the AC97 codec.
1471		 */
1472		if (snd_cs4281_peekBA0(chip, BA0_CLKCR1) & BA0_CLKCR1_DLLRDY)
1473			goto __ok0;
1474		schedule_timeout_uninterruptible(1);
1475	} while (time_after_eq(end_time, jiffies));
1476
1477	dev_err(chip->card->dev, "DLLRDY not seen\n");
1478	return -EIO;
1479
1480      __ok0:
1481
1482	/*
1483	 *  The first thing we do here is to enable sync generation.  As soon
1484	 *  as we start receiving bit clock, we'll start producing the SYNC
1485	 *  signal.
1486	 */
1487	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_ESYN);
1488
1489	/*
1490	 * Wait for the codec ready signal from the AC97 codec.
1491	 */
1492	end_time = jiffies + HZ;
1493	do {
1494		/*
1495		 *  Read the AC97 status register to see if we've seen a CODEC
1496		 *  signal from the AC97 codec.
1497		 */
1498		if (snd_cs4281_peekBA0(chip, BA0_ACSTS) & BA0_ACSTS_CRDY)
1499			goto __ok1;
1500		schedule_timeout_uninterruptible(1);
1501	} while (time_after_eq(end_time, jiffies));
1502
1503	dev_err(chip->card->dev,
1504		"never read codec ready from AC'97 (0x%x)\n",
1505		snd_cs4281_peekBA0(chip, BA0_ACSTS));
1506	return -EIO;
1507
1508      __ok1:
1509	if (chip->dual_codec) {
1510		end_time = jiffies + HZ;
1511		do {
1512			if (snd_cs4281_peekBA0(chip, BA0_ACSTS2) & BA0_ACSTS_CRDY)
1513				goto __codec2_ok;
1514			schedule_timeout_uninterruptible(1);
1515		} while (time_after_eq(end_time, jiffies));
1516		dev_info(chip->card->dev,
1517			 "secondary codec doesn't respond. disable it...\n");
1518		chip->dual_codec = 0;
1519	__codec2_ok: ;
1520	}
1521
1522	/*
1523	 *  Assert the valid frame signal so that we can start sending commands
1524	 *  to the AC97 codec.
1525	 */
1526
1527	snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_VFRM | BA0_ACCTL_ESYN);
1528
1529	/*
1530	 *  Wait until we've sampled input slots 3 and 4 as valid, meaning that
1531	 *  the codec is pumping ADC data across the AC-link.
1532	 */
1533
1534	end_time = jiffies + HZ;
1535	do {
1536		/*
1537		 *  Read the input slot valid register and see if input slots 3
1538		 *  4 are valid yet.
1539		 */
1540                if ((snd_cs4281_peekBA0(chip, BA0_ACISV) & (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4))) == (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4)))
1541                        goto __ok2;
1542		schedule_timeout_uninterruptible(1);
1543	} while (time_after_eq(end_time, jiffies));
1544
1545	if (--retry_count > 0)
1546		goto __retry;
1547	dev_err(chip->card->dev, "never read ISV3 and ISV4 from AC'97\n");
1548	return -EIO;
1549
1550      __ok2:
1551
1552	/*
1553	 *  Now, assert valid frame and the slot 3 and 4 valid bits.  This will
1554	 *  commense the transfer of digital audio data to the AC97 codec.
1555	 */
1556	snd_cs4281_pokeBA0(chip, BA0_ACOSV, BA0_ACOSV_SLV(3) | BA0_ACOSV_SLV(4));
1557
1558	/*
1559	 *  Initialize DMA structures
1560	 */
1561	for (tmp = 0; tmp < 4; tmp++) {
1562		struct cs4281_dma *dma = &chip->dma[tmp];
1563		dma->regDBA = BA0_DBA0 + (tmp * 0x10);
1564		dma->regDCA = BA0_DCA0 + (tmp * 0x10);
1565		dma->regDBC = BA0_DBC0 + (tmp * 0x10);
1566		dma->regDCC = BA0_DCC0 + (tmp * 0x10);
1567		dma->regDMR = BA0_DMR0 + (tmp * 8);
1568		dma->regDCR = BA0_DCR0 + (tmp * 8);
1569		dma->regHDSR = BA0_HDSR0 + (tmp * 4);
1570		dma->regFCR = BA0_FCR0 + (tmp * 4);
1571		dma->regFSIC = BA0_FSIC0 + (tmp * 4);
1572		dma->fifo_offset = tmp * CS4281_FIFO_SIZE;
1573		snd_cs4281_pokeBA0(chip, dma->regFCR,
1574				   BA0_FCR_LS(31) |
1575				   BA0_FCR_RS(31) |
1576				   BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1577				   BA0_FCR_OF(dma->fifo_offset));
1578	}
1579
1580	chip->src_left_play_slot = 0;	/* AC'97 left PCM playback (3) */
1581	chip->src_right_play_slot = 1;	/* AC'97 right PCM playback (4) */
1582	chip->src_left_rec_slot = 10;	/* AC'97 left PCM record (3) */
1583	chip->src_right_rec_slot = 11;	/* AC'97 right PCM record (4) */
1584
1585	/* Activate wave playback FIFO for FM playback */
1586	chip->dma[0].valFCR = BA0_FCR_FEN | BA0_FCR_LS(0) |
1587		              BA0_FCR_RS(1) |
1588 	  	              BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1589		              BA0_FCR_OF(chip->dma[0].fifo_offset);
1590	snd_cs4281_pokeBA0(chip, chip->dma[0].regFCR, chip->dma[0].valFCR);
1591	snd_cs4281_pokeBA0(chip, BA0_SRCSA, (chip->src_left_play_slot << 0) |
1592					    (chip->src_right_play_slot << 8) |
1593					    (chip->src_left_rec_slot << 16) |
1594					    (chip->src_right_rec_slot << 24));
1595
1596	/* Initialize digital volume */
1597	snd_cs4281_pokeBA0(chip, BA0_PPLVC, 0);
1598	snd_cs4281_pokeBA0(chip, BA0_PPRVC, 0);
1599
1600	/* Enable IRQs */
1601	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1602	/* Unmask interrupts */
1603	snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff & ~(
1604					BA0_HISR_MIDI |
1605					BA0_HISR_DMAI |
1606					BA0_HISR_DMA(0) |
1607					BA0_HISR_DMA(1) |
1608					BA0_HISR_DMA(2) |
1609					BA0_HISR_DMA(3)));
1610
1611	return 0;
1612}
1613
1614/*
1615 *  MIDI section
1616 */
1617
1618static void snd_cs4281_midi_reset(struct cs4281 *chip)
1619{
1620	snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr | BA0_MIDCR_MRST);
1621	udelay(100);
1622	snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1623}
1624
1625static int snd_cs4281_midi_input_open(struct snd_rawmidi_substream *substream)
1626{
1627	struct cs4281 *chip = substream->rmidi->private_data;
1628
1629	spin_lock_irq(&chip->reg_lock);
1630 	chip->midcr |= BA0_MIDCR_RXE;
1631	chip->midi_input = substream;
1632	if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1633		snd_cs4281_midi_reset(chip);
1634	} else {
1635		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1636	}
1637	spin_unlock_irq(&chip->reg_lock);
1638	return 0;
1639}
1640
1641static int snd_cs4281_midi_input_close(struct snd_rawmidi_substream *substream)
1642{
1643	struct cs4281 *chip = substream->rmidi->private_data;
1644
1645	spin_lock_irq(&chip->reg_lock);
1646	chip->midcr &= ~(BA0_MIDCR_RXE | BA0_MIDCR_RIE);
1647	chip->midi_input = NULL;
1648	if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1649		snd_cs4281_midi_reset(chip);
1650	} else {
1651		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1652	}
1653	chip->uartm &= ~CS4281_MODE_INPUT;
1654	spin_unlock_irq(&chip->reg_lock);
1655	return 0;
1656}
1657
1658static int snd_cs4281_midi_output_open(struct snd_rawmidi_substream *substream)
1659{
1660	struct cs4281 *chip = substream->rmidi->private_data;
1661
1662	spin_lock_irq(&chip->reg_lock);
1663	chip->uartm |= CS4281_MODE_OUTPUT;
1664	chip->midcr |= BA0_MIDCR_TXE;
1665	chip->midi_output = substream;
1666	if (!(chip->uartm & CS4281_MODE_INPUT)) {
1667		snd_cs4281_midi_reset(chip);
1668	} else {
1669		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1670	}
1671	spin_unlock_irq(&chip->reg_lock);
1672	return 0;
1673}
1674
1675static int snd_cs4281_midi_output_close(struct snd_rawmidi_substream *substream)
1676{
1677	struct cs4281 *chip = substream->rmidi->private_data;
1678
1679	spin_lock_irq(&chip->reg_lock);
1680	chip->midcr &= ~(BA0_MIDCR_TXE | BA0_MIDCR_TIE);
1681	chip->midi_output = NULL;
1682	if (!(chip->uartm & CS4281_MODE_INPUT)) {
1683		snd_cs4281_midi_reset(chip);
1684	} else {
1685		snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1686	}
1687	chip->uartm &= ~CS4281_MODE_OUTPUT;
1688	spin_unlock_irq(&chip->reg_lock);
1689	return 0;
1690}
1691
1692static void snd_cs4281_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1693{
1694	unsigned long flags;
1695	struct cs4281 *chip = substream->rmidi->private_data;
1696
1697	spin_lock_irqsave(&chip->reg_lock, flags);
1698	if (up) {
1699		if ((chip->midcr & BA0_MIDCR_RIE) == 0) {
1700			chip->midcr |= BA0_MIDCR_RIE;
1701			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1702		}
1703	} else {
1704		if (chip->midcr & BA0_MIDCR_RIE) {
1705			chip->midcr &= ~BA0_MIDCR_RIE;
1706			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1707		}
1708	}
1709	spin_unlock_irqrestore(&chip->reg_lock, flags);
1710}
1711
1712static void snd_cs4281_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1713{
1714	unsigned long flags;
1715	struct cs4281 *chip = substream->rmidi->private_data;
1716	unsigned char byte;
1717
1718	spin_lock_irqsave(&chip->reg_lock, flags);
1719	if (up) {
1720		if ((chip->midcr & BA0_MIDCR_TIE) == 0) {
1721			chip->midcr |= BA0_MIDCR_TIE;
1722			/* fill UART FIFO buffer at first, and turn Tx interrupts only if necessary */
1723			while ((chip->midcr & BA0_MIDCR_TIE) &&
1724			       (snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1725				if (snd_rawmidi_transmit(substream, &byte, 1) != 1) {
1726					chip->midcr &= ~BA0_MIDCR_TIE;
1727				} else {
1728					snd_cs4281_pokeBA0(chip, BA0_MIDWP, byte);
1729				}
1730			}
1731			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1732		}
1733	} else {
1734		if (chip->midcr & BA0_MIDCR_TIE) {
1735			chip->midcr &= ~BA0_MIDCR_TIE;
1736			snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1737		}
1738	}
1739	spin_unlock_irqrestore(&chip->reg_lock, flags);
1740}
1741
1742static const struct snd_rawmidi_ops snd_cs4281_midi_output =
1743{
1744	.open =		snd_cs4281_midi_output_open,
1745	.close =	snd_cs4281_midi_output_close,
1746	.trigger =	snd_cs4281_midi_output_trigger,
1747};
1748
1749static const struct snd_rawmidi_ops snd_cs4281_midi_input =
1750{
1751	.open = 	snd_cs4281_midi_input_open,
1752	.close =	snd_cs4281_midi_input_close,
1753	.trigger =	snd_cs4281_midi_input_trigger,
1754};
1755
1756static int snd_cs4281_midi(struct cs4281 *chip, int device)
1757{
1758	struct snd_rawmidi *rmidi;
1759	int err;
1760
1761	err = snd_rawmidi_new(chip->card, "CS4281", device, 1, 1, &rmidi);
1762	if (err < 0)
1763		return err;
1764	strcpy(rmidi->name, "CS4281");
1765	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_cs4281_midi_output);
1766	snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_cs4281_midi_input);
1767	rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
1768	rmidi->private_data = chip;
1769	chip->rmidi = rmidi;
1770	return 0;
1771}
1772
1773/*
1774 *  Interrupt handler
1775 */
1776
1777static irqreturn_t snd_cs4281_interrupt(int irq, void *dev_id)
1778{
1779	struct cs4281 *chip = dev_id;
1780	unsigned int status, dma, val;
1781	struct cs4281_dma *cdma;
1782
1783	if (chip == NULL)
1784		return IRQ_NONE;
1785	status = snd_cs4281_peekBA0(chip, BA0_HISR);
1786	if ((status & 0x7fffffff) == 0) {
1787		snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1788		return IRQ_NONE;
1789	}
1790
1791	if (status & (BA0_HISR_DMA(0)|BA0_HISR_DMA(1)|BA0_HISR_DMA(2)|BA0_HISR_DMA(3))) {
1792		for (dma = 0; dma < 4; dma++)
1793			if (status & BA0_HISR_DMA(dma)) {
1794				cdma = &chip->dma[dma];
1795				spin_lock(&chip->reg_lock);
1796				/* ack DMA IRQ */
1797				val = snd_cs4281_peekBA0(chip, cdma->regHDSR);
1798				/* workaround, sometimes CS4281 acknowledges */
1799				/* end or middle transfer position twice */
1800				cdma->frag++;
1801				if ((val & BA0_HDSR_DHTC) && !(cdma->frag & 1)) {
1802					cdma->frag--;
1803					chip->spurious_dhtc_irq++;
1804					spin_unlock(&chip->reg_lock);
1805					continue;
1806				}
1807				if ((val & BA0_HDSR_DTC) && (cdma->frag & 1)) {
1808					cdma->frag--;
1809					chip->spurious_dtc_irq++;
1810					spin_unlock(&chip->reg_lock);
1811					continue;
1812				}
1813				spin_unlock(&chip->reg_lock);
1814				snd_pcm_period_elapsed(cdma->substream);
1815			}
1816	}
1817
1818	if ((status & BA0_HISR_MIDI) && chip->rmidi) {
1819		unsigned char c;
1820		
1821		spin_lock(&chip->reg_lock);
1822		while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_RBE) == 0) {
1823			c = snd_cs4281_peekBA0(chip, BA0_MIDRP);
1824			if ((chip->midcr & BA0_MIDCR_RIE) == 0)
1825				continue;
1826			snd_rawmidi_receive(chip->midi_input, &c, 1);
1827		}
1828		while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1829			if ((chip->midcr & BA0_MIDCR_TIE) == 0)
1830				break;
1831			if (snd_rawmidi_transmit(chip->midi_output, &c, 1) != 1) {
1832				chip->midcr &= ~BA0_MIDCR_TIE;
1833				snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1834				break;
1835			}
1836			snd_cs4281_pokeBA0(chip, BA0_MIDWP, c);
1837		}
1838		spin_unlock(&chip->reg_lock);
1839	}
1840
1841	/* EOI to the PCI part... reenables interrupts */
1842	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1843
1844	return IRQ_HANDLED;
1845}
1846
1847
1848/*
1849 * OPL3 command
1850 */
1851static void snd_cs4281_opl3_command(struct snd_opl3 *opl3, unsigned short cmd,
1852				    unsigned char val)
1853{
1854	unsigned long flags;
1855	struct cs4281 *chip = opl3->private_data;
1856	void __iomem *port;
1857
1858	if (cmd & OPL3_RIGHT)
1859		port = chip->ba0 + BA0_B1AP; /* right port */
1860	else
1861		port = chip->ba0 + BA0_B0AP; /* left port */
1862
1863	spin_lock_irqsave(&opl3->reg_lock, flags);
1864
1865	writel((unsigned int)cmd, port);
1866	udelay(10);
1867
1868	writel((unsigned int)val, port + 4);
1869	udelay(30);
1870
1871	spin_unlock_irqrestore(&opl3->reg_lock, flags);
1872}
1873
1874static int snd_cs4281_probe(struct pci_dev *pci,
1875			    const struct pci_device_id *pci_id)
1876{
1877	static int dev;
1878	struct snd_card *card;
1879	struct cs4281 *chip;
1880	struct snd_opl3 *opl3;
1881	int err;
1882
1883        if (dev >= SNDRV_CARDS)
1884                return -ENODEV;
1885	if (!enable[dev]) {
1886		dev++;
1887		return -ENOENT;
1888	}
1889
1890	err = snd_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
1891			   0, &card);
1892	if (err < 0)
1893		return err;
 
1894
1895	err = snd_cs4281_create(card, pci, &chip, dual_codec[dev]);
1896	if (err < 0) {
1897		snd_card_free(card);
1898		return err;
1899	}
1900	card->private_data = chip;
1901
1902	err = snd_cs4281_mixer(chip);
1903	if (err < 0) {
1904		snd_card_free(card);
1905		return err;
1906	}
1907	err = snd_cs4281_pcm(chip, 0);
1908	if (err < 0) {
1909		snd_card_free(card);
1910		return err;
1911	}
1912	err = snd_cs4281_midi(chip, 0);
1913	if (err < 0) {
1914		snd_card_free(card);
1915		return err;
1916	}
1917	err = snd_opl3_new(card, OPL3_HW_OPL3_CS4281, &opl3);
1918	if (err < 0) {
1919		snd_card_free(card);
1920		return err;
1921	}
1922	opl3->private_data = chip;
1923	opl3->command = snd_cs4281_opl3_command;
1924	snd_opl3_init(opl3);
1925	err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
1926	if (err < 0) {
1927		snd_card_free(card);
1928		return err;
1929	}
1930	snd_cs4281_create_gameport(chip);
1931	strcpy(card->driver, "CS4281");
1932	strcpy(card->shortname, "Cirrus Logic CS4281");
1933	sprintf(card->longname, "%s at 0x%lx, irq %d",
1934		card->shortname,
1935		chip->ba0_addr,
1936		chip->irq);
1937
1938	err = snd_card_register(card);
1939	if (err < 0) {
1940		snd_card_free(card);
1941		return err;
1942	}
1943
1944	pci_set_drvdata(pci, card);
1945	dev++;
1946	return 0;
1947}
1948
1949static void snd_cs4281_remove(struct pci_dev *pci)
 
1950{
1951	snd_card_free(pci_get_drvdata(pci));
1952}
1953
1954/*
1955 * Power Management
1956 */
1957#ifdef CONFIG_PM_SLEEP
1958
1959static const int saved_regs[SUSPEND_REGISTERS] = {
1960	BA0_JSCTL,
1961	BA0_GPIOR,
1962	BA0_SSCR,
1963	BA0_MIDCR,
1964	BA0_SRCSA,
1965	BA0_PASR,
1966	BA0_CASR,
1967	BA0_DACSR,
1968	BA0_ADCSR,
1969	BA0_FMLVC,
1970	BA0_FMRVC,
1971	BA0_PPLVC,
1972	BA0_PPRVC,
1973};
1974
1975#define CLKCR1_CKRA                             0x00010000L
1976
1977static int cs4281_suspend(struct device *dev)
1978{
1979	struct snd_card *card = dev_get_drvdata(dev);
1980	struct cs4281 *chip = card->private_data;
1981	u32 ulCLK;
1982	unsigned int i;
1983
1984	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1985	snd_ac97_suspend(chip->ac97);
1986	snd_ac97_suspend(chip->ac97_secondary);
1987
1988	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
1989	ulCLK |= CLKCR1_CKRA;
1990	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
1991
1992	/* Disable interrupts. */
1993	snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_CHGM);
1994
1995	/* remember the status registers */
1996	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
1997		if (saved_regs[i])
1998			chip->suspend_regs[i] = snd_cs4281_peekBA0(chip, saved_regs[i]);
1999
2000	/* Turn off the serial ports. */
2001	snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
2002
2003	/* Power off FM, Joystick, AC link, */
2004	snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
2005
2006	/* DLL off. */
2007	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
2008
2009	/* AC link off. */
2010	snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
2011
2012	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2013	ulCLK &= ~CLKCR1_CKRA;
2014	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2015	return 0;
2016}
2017
2018static int cs4281_resume(struct device *dev)
2019{
2020	struct snd_card *card = dev_get_drvdata(dev);
2021	struct cs4281 *chip = card->private_data;
2022	unsigned int i;
2023	u32 ulCLK;
2024
2025	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2026	ulCLK |= CLKCR1_CKRA;
2027	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2028
2029	snd_cs4281_chip_init(chip);
2030
2031	/* restore the status registers */
2032	for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
2033		if (saved_regs[i])
2034			snd_cs4281_pokeBA0(chip, saved_regs[i], chip->suspend_regs[i]);
2035
2036	snd_ac97_resume(chip->ac97);
2037	snd_ac97_resume(chip->ac97_secondary);
2038
2039	ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
2040	ulCLK &= ~CLKCR1_CKRA;
2041	snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
2042
2043	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
2044	return 0;
2045}
2046
2047static SIMPLE_DEV_PM_OPS(cs4281_pm, cs4281_suspend, cs4281_resume);
2048#define CS4281_PM_OPS	&cs4281_pm
2049#else
2050#define CS4281_PM_OPS	NULL
2051#endif /* CONFIG_PM_SLEEP */
2052
2053static struct pci_driver cs4281_driver = {
2054	.name = KBUILD_MODNAME,
2055	.id_table = snd_cs4281_ids,
2056	.probe = snd_cs4281_probe,
2057	.remove = snd_cs4281_remove,
2058	.driver = {
2059		.pm = CS4281_PM_OPS,
2060	},
2061};
2062	
2063module_pci_driver(cs4281_driver);