sound/pci/cs4281.c

   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
  25 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  26 MODULE_DESCRIPTION("Cirrus Logic CS4281");
  27 MODULE_LICENSE("GPL");
  28
  29 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  30 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  31 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable switches */
  32 static bool dual_codec[SNDRV_CARDS];    /* dual codec */
  33
  34 module_param_array(index, int, NULL, 0444);
  35 MODULE_PARM_DESC(index, "Index value for CS4281 soundcard.");
  36 module_param_array(id, charp, NULL, 0444);
  37 MODULE_PARM_DESC(id, "ID string for CS4281 soundcard.");
  38 module_param_array(enable, bool, NULL, 0444);
  39 MODULE_PARM_DESC(enable, "Enable CS4281 soundcard.");
  40 module_param_array(dual_codec, bool, NULL, 0444);
  41 MODULE_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
 414 struct 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
 436 struct 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
 479 static irqreturn_t snd_cs4281_interrupt(int irq, void *dev_id);
 480
 481 static const struct pci_device_id snd_cs4281_ids[] = {
 482         { PCI_VDEVICE(CIRRUS, 0x6005), 0, },    /* CS4281 */
 483         { 0, }
 484 };
 485
 486 MODULE_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
 498 static inline void snd_cs4281_pokeBA0(struct cs4281 *chip, unsigned long offset,
 499                                       unsigned int val)
 500 {
 501         writel(val, chip->ba0 + offset);
 502 }
 503
 504 static inline unsigned int snd_cs4281_peekBA0(struct cs4281 *chip, unsigned long offset)
 505 {
 506         return readl(chip->ba0 + offset);
 507 }
 508
 509 static 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
 555 static 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
 652 static 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
 694 static 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
 717 static 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
 782 static 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
 794 static 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
 806 static 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
 822 static 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
 847 static 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
 872 static 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
 891 static 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
 910 static 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
 918 static 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
 926 static 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
 934 static 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
 942 static 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
 971 static 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
 981 static 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
 997 static 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
1022 static const DECLARE_TLV_DB_SCALE(db_scale_dsp, -4650, 150, 0);
1023
1024 static 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
1035 static 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
1046 static 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
1052 static 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
1061 static 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
1102 static 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
1112 static 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
1124 static 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
1136 static const struct snd_info_entry_ops snd_cs4281_proc_ops_BA0 = {
1137         .read = snd_cs4281_BA0_read,
1138 };
1139
1140 static const struct snd_info_entry_ops snd_cs4281_proc_ops_BA1 = {
1141         .read = snd_cs4281_BA1_read,
1142 };
1143
1144 static 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
1169 static 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
1178 static 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
1188 static 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
1216 static 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
1231 static 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
1259 static 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
1267 static inline int snd_cs4281_create_gameport(struct cs4281 *chip) { return -ENOSYS; }
1268 static inline void snd_cs4281_free_gameport(struct cs4281 *chip) { }
1269 #endif /* IS_REACHABLE(CONFIG_GAMEPORT) */
1270
1271 static void snd_cs4281_free(struct snd_card *card)
1272 {
1273         struct cs4281 *chip = card->private_data;
1274
1275         snd_cs4281_free_gameport(chip);
1276
1277         /* Mask interrupts */
1278         snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff);
1279         /* Stop the DLL Clock logic. */
1280         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1281         /* Sound System Power Management - Turn Everything OFF */
1282         snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
1283 }
1284
1285 static int snd_cs4281_chip_init(struct cs4281 *chip); /* defined below */
1286
1287 static int snd_cs4281_create(struct snd_card *card,
1288                              struct pci_dev *pci,
1289                              int dual_codec)
1290 {
1291         struct cs4281 *chip = card->private_data;
1292         int err;
1293
1294         err = pcim_enable_device(pci);
1295         if (err < 0)
1296                 return err;
1297         spin_lock_init(&chip->reg_lock);
1298         chip->card = card;
1299         chip->pci = pci;
1300         chip->irq = -1;
1301         pci_set_master(pci);
1302         if (dual_codec < 0 || dual_codec > 3) {
1303                 dev_err(card->dev, "invalid dual_codec option %d\n", dual_codec);
1304                 dual_codec = 0;
1305         }
1306         chip->dual_codec = dual_codec;
1307
1308         err = pcim_iomap_regions(pci, 0x03, "CS4281"); /* 2 BARs */
1309         if (err < 0)
1310                 return err;
1311         chip->ba0_addr = pci_resource_start(pci, 0);
1312         chip->ba1_addr = pci_resource_start(pci, 1);
1313
1314         chip->ba0 = pcim_iomap_table(pci)[0];
1315         chip->ba1 = pcim_iomap_table(pci)[1];
1316
1317         if (devm_request_irq(&pci->dev, pci->irq, snd_cs4281_interrupt,
1318                              IRQF_SHARED, KBUILD_MODNAME, chip)) {
1319                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1320                 return -ENOMEM;
1321         }
1322         chip->irq = pci->irq;
1323         card->sync_irq = chip->irq;
1324         card->private_free = snd_cs4281_free;
1325
1326         err = snd_cs4281_chip_init(chip);
1327         if (err)
1328                 return err;
1329
1330         snd_cs4281_proc_init(chip);
1331         return 0;
1332 }
1333
1334 static int snd_cs4281_chip_init(struct cs4281 *chip)
1335 {
1336         unsigned int tmp;
1337         unsigned long end_time;
1338         int retry_count = 2;
1339
1340         /* Having EPPMC.FPDN=1 prevent proper chip initialisation */
1341         tmp = snd_cs4281_peekBA0(chip, BA0_EPPMC);
1342         if (tmp & BA0_EPPMC_FPDN)
1343                 snd_cs4281_pokeBA0(chip, BA0_EPPMC, tmp & ~BA0_EPPMC_FPDN);
1344
1345       __retry:
1346         tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1347         if (tmp != BA0_CFLR_DEFAULT) {
1348                 snd_cs4281_pokeBA0(chip, BA0_CFLR, BA0_CFLR_DEFAULT);
1349                 tmp = snd_cs4281_peekBA0(chip, BA0_CFLR);
1350                 if (tmp != BA0_CFLR_DEFAULT) {
1351                         dev_err(chip->card->dev,
1352                                 "CFLR setup failed (0x%x)\n", tmp);
1353                         return -EIO;
1354                 }
1355         }
1356
1357         /* Set the 'Configuration Write Protect' register
1358          * to 4281h.  Allows vendor-defined configuration
1359          * space between 0e4h and 0ffh to be written. */
1360         snd_cs4281_pokeBA0(chip, BA0_CWPR, 0x4281);
1361
1362         tmp = snd_cs4281_peekBA0(chip, BA0_SERC1);
1363         if (tmp != (BA0_SERC1_SO1EN | BA0_SERC1_AC97)) {
1364                 dev_err(chip->card->dev,
1365                         "SERC1 AC'97 check failed (0x%x)\n", tmp);
1366                 return -EIO;
1367         }
1368         tmp = snd_cs4281_peekBA0(chip, BA0_SERC2);
1369         if (tmp != (BA0_SERC2_SI1EN | BA0_SERC2_AC97)) {
1370                 dev_err(chip->card->dev,
1371                         "SERC2 AC'97 check failed (0x%x)\n", tmp);
1372                 return -EIO;
1373         }
1374
1375         /* Sound System Power Management */
1376         snd_cs4281_pokeBA0(chip, BA0_SSPM, BA0_SSPM_MIXEN | BA0_SSPM_CSRCEN |
1377                                            BA0_SSPM_PSRCEN | BA0_SSPM_JSEN |
1378                                            BA0_SSPM_ACLEN | BA0_SSPM_FMEN);
1379
1380         /* Serial Port Power Management */
1381         /* Blast the clock control register to zero so that the
1382          * PLL starts out in a known state, and blast the master serial
1383          * port control register to zero so that the serial ports also
1384          * start out in a known state. */
1385         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1386         snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
1387
1388         /* Make ESYN go to zero to turn off
1389          * the Sync pulse on the AC97 link. */
1390         snd_cs4281_pokeBA0(chip, BA0_ACCTL, 0);
1391         udelay(50);
1392
1393         /*  Drive the ARST# pin low for a minimum of 1uS (as defined in the AC97
1394          *  spec) and then drive it high.  This is done for non AC97 modes since
1395          *  there might be logic external to the CS4281 that uses the ARST# line
1396          *  for a reset. */
1397         snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
1398         udelay(50);
1399         snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN);
1400         msleep(50);
1401
1402         if (chip->dual_codec)
1403                 snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN | BA0_SPMC_ASDI2E);
1404
1405         /*
1406          *  Set the serial port timing configuration.
1407          */
1408         snd_cs4281_pokeBA0(chip, BA0_SERMC,
1409                            (chip->dual_codec ? BA0_SERMC_TCID(chip->dual_codec) : BA0_SERMC_TCID(1)) |
1410                            BA0_SERMC_PTC_AC97 | BA0_SERMC_MSPE);
1411
1412         /*
1413          *  Start the DLL Clock logic.
1414          */
1415         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_DLLP);
1416         msleep(50);
1417         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, BA0_CLKCR1_SWCE | BA0_CLKCR1_DLLP);
1418
1419         /*
1420          * Wait for the DLL ready signal from the clock logic.
1421          */
1422         end_time = jiffies + HZ;
1423         do {
1424                 /*
1425                  *  Read the AC97 status register to see if we've seen a CODEC
1426                  *  signal from the AC97 codec.
1427                  */
1428                 if (snd_cs4281_peekBA0(chip, BA0_CLKCR1) & BA0_CLKCR1_DLLRDY)
1429                         goto __ok0;
1430                 schedule_timeout_uninterruptible(1);
1431         } while (time_after_eq(end_time, jiffies));
1432
1433         dev_err(chip->card->dev, "DLLRDY not seen\n");
1434         return -EIO;
1435
1436       __ok0:
1437
1438         /*
1439          *  The first thing we do here is to enable sync generation.  As soon
1440          *  as we start receiving bit clock, we'll start producing the SYNC
1441          *  signal.
1442          */
1443         snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_ESYN);
1444
1445         /*
1446          * Wait for the codec ready signal from the AC97 codec.
1447          */
1448         end_time = jiffies + HZ;
1449         do {
1450                 /*
1451                  *  Read the AC97 status register to see if we've seen a CODEC
1452                  *  signal from the AC97 codec.
1453                  */
1454                 if (snd_cs4281_peekBA0(chip, BA0_ACSTS) & BA0_ACSTS_CRDY)
1455                         goto __ok1;
1456                 schedule_timeout_uninterruptible(1);
1457         } while (time_after_eq(end_time, jiffies));
1458
1459         dev_err(chip->card->dev,
1460                 "never read codec ready from AC'97 (0x%x)\n",
1461                 snd_cs4281_peekBA0(chip, BA0_ACSTS));
1462         return -EIO;
1463
1464       __ok1:
1465         if (chip->dual_codec) {
1466                 end_time = jiffies + HZ;
1467                 do {
1468                         if (snd_cs4281_peekBA0(chip, BA0_ACSTS2) & BA0_ACSTS_CRDY)
1469                                 goto __codec2_ok;
1470                         schedule_timeout_uninterruptible(1);
1471                 } while (time_after_eq(end_time, jiffies));
1472                 dev_info(chip->card->dev,
1473                          "secondary codec doesn't respond. disable it...\n");
1474                 chip->dual_codec = 0;
1475         __codec2_ok: ;
1476         }
1477
1478         /*
1479          *  Assert the valid frame signal so that we can start sending commands
1480          *  to the AC97 codec.
1481          */
1482
1483         snd_cs4281_pokeBA0(chip, BA0_ACCTL, BA0_ACCTL_VFRM | BA0_ACCTL_ESYN);
1484
1485         /*
1486          *  Wait until we've sampled input slots 3 and 4 as valid, meaning that
1487          *  the codec is pumping ADC data across the AC-link.
1488          */
1489
1490         end_time = jiffies + HZ;
1491         do {
1492                 /*
1493                  *  Read the input slot valid register and see if input slots 3
1494                  *  4 are valid yet.
1495                  */
1496                 if ((snd_cs4281_peekBA0(chip, BA0_ACISV) & (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4))) == (BA0_ACISV_SLV(3) | BA0_ACISV_SLV(4)))
1497                         goto __ok2;
1498                 schedule_timeout_uninterruptible(1);
1499         } while (time_after_eq(end_time, jiffies));
1500
1501         if (--retry_count > 0)
1502                 goto __retry;
1503         dev_err(chip->card->dev, "never read ISV3 and ISV4 from AC'97\n");
1504         return -EIO;
1505
1506       __ok2:
1507
1508         /*
1509          *  Now, assert valid frame and the slot 3 and 4 valid bits.  This will
1510          *  commense the transfer of digital audio data to the AC97 codec.
1511          */
1512         snd_cs4281_pokeBA0(chip, BA0_ACOSV, BA0_ACOSV_SLV(3) | BA0_ACOSV_SLV(4));
1513
1514         /*
1515          *  Initialize DMA structures
1516          */
1517         for (tmp = 0; tmp < 4; tmp++) {
1518                 struct cs4281_dma *dma = &chip->dma[tmp];
1519                 dma->regDBA = BA0_DBA0 + (tmp * 0x10);
1520                 dma->regDCA = BA0_DCA0 + (tmp * 0x10);
1521                 dma->regDBC = BA0_DBC0 + (tmp * 0x10);
1522                 dma->regDCC = BA0_DCC0 + (tmp * 0x10);
1523                 dma->regDMR = BA0_DMR0 + (tmp * 8);
1524                 dma->regDCR = BA0_DCR0 + (tmp * 8);
1525                 dma->regHDSR = BA0_HDSR0 + (tmp * 4);
1526                 dma->regFCR = BA0_FCR0 + (tmp * 4);
1527                 dma->regFSIC = BA0_FSIC0 + (tmp * 4);
1528                 dma->fifo_offset = tmp * CS4281_FIFO_SIZE;
1529                 snd_cs4281_pokeBA0(chip, dma->regFCR,
1530                                    BA0_FCR_LS(31) |
1531                                    BA0_FCR_RS(31) |
1532                                    BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1533                                    BA0_FCR_OF(dma->fifo_offset));
1534         }
1535
1536         chip->src_left_play_slot = 0;   /* AC'97 left PCM playback (3) */
1537         chip->src_right_play_slot = 1;  /* AC'97 right PCM playback (4) */
1538         chip->src_left_rec_slot = 10;   /* AC'97 left PCM record (3) */
1539         chip->src_right_rec_slot = 11;  /* AC'97 right PCM record (4) */
1540
1541         /* Activate wave playback FIFO for FM playback */
1542         chip->dma[0].valFCR = BA0_FCR_FEN | BA0_FCR_LS(0) |
1543                               BA0_FCR_RS(1) |
1544                               BA0_FCR_SZ(CS4281_FIFO_SIZE) |
1545                               BA0_FCR_OF(chip->dma[0].fifo_offset);
1546         snd_cs4281_pokeBA0(chip, chip->dma[0].regFCR, chip->dma[0].valFCR);
1547         snd_cs4281_pokeBA0(chip, BA0_SRCSA, (chip->src_left_play_slot << 0) |
1548                                             (chip->src_right_play_slot << 8) |
1549                                             (chip->src_left_rec_slot << 16) |
1550                                             (chip->src_right_rec_slot << 24));
1551
1552         /* Initialize digital volume */
1553         snd_cs4281_pokeBA0(chip, BA0_PPLVC, 0);
1554         snd_cs4281_pokeBA0(chip, BA0_PPRVC, 0);
1555
1556         /* Enable IRQs */
1557         snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1558         /* Unmask interrupts */
1559         snd_cs4281_pokeBA0(chip, BA0_HIMR, 0x7fffffff & ~(
1560                                         BA0_HISR_MIDI |
1561                                         BA0_HISR_DMAI |
1562                                         BA0_HISR_DMA(0) |
1563                                         BA0_HISR_DMA(1) |
1564                                         BA0_HISR_DMA(2) |
1565                                         BA0_HISR_DMA(3)));
1566
1567         return 0;
1568 }
1569
1570 /*
1571  *  MIDI section
1572  */
1573
1574 static void snd_cs4281_midi_reset(struct cs4281 *chip)
1575 {
1576         snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr | BA0_MIDCR_MRST);
1577         udelay(100);
1578         snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1579 }
1580
1581 static int snd_cs4281_midi_input_open(struct snd_rawmidi_substream *substream)
1582 {
1583         struct cs4281 *chip = substream->rmidi->private_data;
1584
1585         spin_lock_irq(&chip->reg_lock);
1586         chip->midcr |= BA0_MIDCR_RXE;
1587         chip->midi_input = substream;
1588         if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1589                 snd_cs4281_midi_reset(chip);
1590         } else {
1591                 snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1592         }
1593         spin_unlock_irq(&chip->reg_lock);
1594         return 0;
1595 }
1596
1597 static int snd_cs4281_midi_input_close(struct snd_rawmidi_substream *substream)
1598 {
1599         struct cs4281 *chip = substream->rmidi->private_data;
1600
1601         spin_lock_irq(&chip->reg_lock);
1602         chip->midcr &= ~(BA0_MIDCR_RXE | BA0_MIDCR_RIE);
1603         chip->midi_input = NULL;
1604         if (!(chip->uartm & CS4281_MODE_OUTPUT)) {
1605                 snd_cs4281_midi_reset(chip);
1606         } else {
1607                 snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1608         }
1609         chip->uartm &= ~CS4281_MODE_INPUT;
1610         spin_unlock_irq(&chip->reg_lock);
1611         return 0;
1612 }
1613
1614 static int snd_cs4281_midi_output_open(struct snd_rawmidi_substream *substream)
1615 {
1616         struct cs4281 *chip = substream->rmidi->private_data;
1617
1618         spin_lock_irq(&chip->reg_lock);
1619         chip->uartm |= CS4281_MODE_OUTPUT;
1620         chip->midcr |= BA0_MIDCR_TXE;
1621         chip->midi_output = substream;
1622         if (!(chip->uartm & CS4281_MODE_INPUT)) {
1623                 snd_cs4281_midi_reset(chip);
1624         } else {
1625                 snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1626         }
1627         spin_unlock_irq(&chip->reg_lock);
1628         return 0;
1629 }
1630
1631 static int snd_cs4281_midi_output_close(struct snd_rawmidi_substream *substream)
1632 {
1633         struct cs4281 *chip = substream->rmidi->private_data;
1634
1635         spin_lock_irq(&chip->reg_lock);
1636         chip->midcr &= ~(BA0_MIDCR_TXE | BA0_MIDCR_TIE);
1637         chip->midi_output = NULL;
1638         if (!(chip->uartm & CS4281_MODE_INPUT)) {
1639                 snd_cs4281_midi_reset(chip);
1640         } else {
1641                 snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1642         }
1643         chip->uartm &= ~CS4281_MODE_OUTPUT;
1644         spin_unlock_irq(&chip->reg_lock);
1645         return 0;
1646 }
1647
1648 static void snd_cs4281_midi_input_trigger(struct snd_rawmidi_substream *substream, int up)
1649 {
1650         unsigned long flags;
1651         struct cs4281 *chip = substream->rmidi->private_data;
1652
1653         spin_lock_irqsave(&chip->reg_lock, flags);
1654         if (up) {
1655                 if ((chip->midcr & BA0_MIDCR_RIE) == 0) {
1656                         chip->midcr |= BA0_MIDCR_RIE;
1657                         snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1658                 }
1659         } else {
1660                 if (chip->midcr & BA0_MIDCR_RIE) {
1661                         chip->midcr &= ~BA0_MIDCR_RIE;
1662                         snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1663                 }
1664         }
1665         spin_unlock_irqrestore(&chip->reg_lock, flags);
1666 }
1667
1668 static void snd_cs4281_midi_output_trigger(struct snd_rawmidi_substream *substream, int up)
1669 {
1670         unsigned long flags;
1671         struct cs4281 *chip = substream->rmidi->private_data;
1672         unsigned char byte;
1673
1674         spin_lock_irqsave(&chip->reg_lock, flags);
1675         if (up) {
1676                 if ((chip->midcr & BA0_MIDCR_TIE) == 0) {
1677                         chip->midcr |= BA0_MIDCR_TIE;
1678                         /* fill UART FIFO buffer at first, and turn Tx interrupts only if necessary */
1679                         while ((chip->midcr & BA0_MIDCR_TIE) &&
1680                                (snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1681                                 if (snd_rawmidi_transmit(substream, &byte, 1) != 1) {
1682                                         chip->midcr &= ~BA0_MIDCR_TIE;
1683                                 } else {
1684                                         snd_cs4281_pokeBA0(chip, BA0_MIDWP, byte);
1685                                 }
1686                         }
1687                         snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1688                 }
1689         } else {
1690                 if (chip->midcr & BA0_MIDCR_TIE) {
1691                         chip->midcr &= ~BA0_MIDCR_TIE;
1692                         snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1693                 }
1694         }
1695         spin_unlock_irqrestore(&chip->reg_lock, flags);
1696 }
1697
1698 static const struct snd_rawmidi_ops snd_cs4281_midi_output =
1699 {
1700         .open =         snd_cs4281_midi_output_open,
1701         .close =        snd_cs4281_midi_output_close,
1702         .trigger =      snd_cs4281_midi_output_trigger,
1703 };
1704
1705 static const struct snd_rawmidi_ops snd_cs4281_midi_input =
1706 {
1707         .open =         snd_cs4281_midi_input_open,
1708         .close =        snd_cs4281_midi_input_close,
1709         .trigger =      snd_cs4281_midi_input_trigger,
1710 };
1711
1712 static int snd_cs4281_midi(struct cs4281 *chip, int device)
1713 {
1714         struct snd_rawmidi *rmidi;
1715         int err;
1716
1717         err = snd_rawmidi_new(chip->card, "CS4281", device, 1, 1, &rmidi);
1718         if (err < 0)
1719                 return err;
1720         strcpy(rmidi->name, "CS4281");
1721         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_OUTPUT, &snd_cs4281_midi_output);
1722         snd_rawmidi_set_ops(rmidi, SNDRV_RAWMIDI_STREAM_INPUT, &snd_cs4281_midi_input);
1723         rmidi->info_flags |= SNDRV_RAWMIDI_INFO_OUTPUT | SNDRV_RAWMIDI_INFO_INPUT | SNDRV_RAWMIDI_INFO_DUPLEX;
1724         rmidi->private_data = chip;
1725         chip->rmidi = rmidi;
1726         return 0;
1727 }
1728
1729 /*
1730  *  Interrupt handler
1731  */
1732
1733 static irqreturn_t snd_cs4281_interrupt(int irq, void *dev_id)
1734 {
1735         struct cs4281 *chip = dev_id;
1736         unsigned int status, dma, val;
1737         struct cs4281_dma *cdma;
1738
1739         if (chip == NULL)
1740                 return IRQ_NONE;
1741         status = snd_cs4281_peekBA0(chip, BA0_HISR);
1742         if ((status & 0x7fffffff) == 0) {
1743                 snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1744                 return IRQ_NONE;
1745         }
1746
1747         if (status & (BA0_HISR_DMA(0)|BA0_HISR_DMA(1)|BA0_HISR_DMA(2)|BA0_HISR_DMA(3))) {
1748                 for (dma = 0; dma < 4; dma++)
1749                         if (status & BA0_HISR_DMA(dma)) {
1750                                 cdma = &chip->dma[dma];
1751                                 spin_lock(&chip->reg_lock);
1752                                 /* ack DMA IRQ */
1753                                 val = snd_cs4281_peekBA0(chip, cdma->regHDSR);
1754                                 /* workaround, sometimes CS4281 acknowledges */
1755                                 /* end or middle transfer position twice */
1756                                 cdma->frag++;
1757                                 if ((val & BA0_HDSR_DHTC) && !(cdma->frag & 1)) {
1758                                         cdma->frag--;
1759                                         chip->spurious_dhtc_irq++;
1760                                         spin_unlock(&chip->reg_lock);
1761                                         continue;
1762                                 }
1763                                 if ((val & BA0_HDSR_DTC) && (cdma->frag & 1)) {
1764                                         cdma->frag--;
1765                                         chip->spurious_dtc_irq++;
1766                                         spin_unlock(&chip->reg_lock);
1767                                         continue;
1768                                 }
1769                                 spin_unlock(&chip->reg_lock);
1770                                 snd_pcm_period_elapsed(cdma->substream);
1771                         }
1772         }
1773
1774         if ((status & BA0_HISR_MIDI) && chip->rmidi) {
1775                 unsigned char c;
1776
1777                 spin_lock(&chip->reg_lock);
1778                 while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_RBE) == 0) {
1779                         c = snd_cs4281_peekBA0(chip, BA0_MIDRP);
1780                         if ((chip->midcr & BA0_MIDCR_RIE) == 0)
1781                                 continue;
1782                         snd_rawmidi_receive(chip->midi_input, &c, 1);
1783                 }
1784                 while ((snd_cs4281_peekBA0(chip, BA0_MIDSR) & BA0_MIDSR_TBF) == 0) {
1785                         if ((chip->midcr & BA0_MIDCR_TIE) == 0)
1786                                 break;
1787                         if (snd_rawmidi_transmit(chip->midi_output, &c, 1) != 1) {
1788                                 chip->midcr &= ~BA0_MIDCR_TIE;
1789                                 snd_cs4281_pokeBA0(chip, BA0_MIDCR, chip->midcr);
1790                                 break;
1791                         }
1792                         snd_cs4281_pokeBA0(chip, BA0_MIDWP, c);
1793                 }
1794                 spin_unlock(&chip->reg_lock);
1795         }
1796
1797         /* EOI to the PCI part... reenables interrupts */
1798         snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_EOI);
1799
1800         return IRQ_HANDLED;
1801 }
1802
1803
1804 /*
1805  * OPL3 command
1806  */
1807 static void snd_cs4281_opl3_command(struct snd_opl3 *opl3, unsigned short cmd,
1808                                     unsigned char val)
1809 {
1810         unsigned long flags;
1811         struct cs4281 *chip = opl3->private_data;
1812         void __iomem *port;
1813
1814         if (cmd & OPL3_RIGHT)
1815                 port = chip->ba0 + BA0_B1AP; /* right port */
1816         else
1817                 port = chip->ba0 + BA0_B0AP; /* left port */
1818
1819         spin_lock_irqsave(&opl3->reg_lock, flags);
1820
1821         writel((unsigned int)cmd, port);
1822         udelay(10);
1823
1824         writel((unsigned int)val, port + 4);
1825         udelay(30);
1826
1827         spin_unlock_irqrestore(&opl3->reg_lock, flags);
1828 }
1829
1830 static int __snd_cs4281_probe(struct pci_dev *pci,
1831                               const struct pci_device_id *pci_id)
1832 {
1833         static int dev;
1834         struct snd_card *card;
1835         struct cs4281 *chip;
1836         struct snd_opl3 *opl3;
1837         int err;
1838
1839         if (dev >= SNDRV_CARDS)
1840                 return -ENODEV;
1841         if (!enable[dev]) {
1842                 dev++;
1843                 return -ENOENT;
1844         }
1845
1846         err = snd_devm_card_new(&pci->dev, index[dev], id[dev], THIS_MODULE,
1847                                 sizeof(*chip), &card);
1848         if (err < 0)
1849                 return err;
1850         chip = card->private_data;
1851
1852         err = snd_cs4281_create(card, pci, dual_codec[dev]);
1853         if (err < 0)
1854                 return err;
1855
1856         err = snd_cs4281_mixer(chip);
1857         if (err < 0)
1858                 return err;
1859         err = snd_cs4281_pcm(chip, 0);
1860         if (err < 0)
1861                 return err;
1862         err = snd_cs4281_midi(chip, 0);
1863         if (err < 0)
1864                 return err;
1865         err = snd_opl3_new(card, OPL3_HW_OPL3_CS4281, &opl3);
1866         if (err < 0)
1867                 return err;
1868         opl3->private_data = chip;
1869         opl3->command = snd_cs4281_opl3_command;
1870         snd_opl3_init(opl3);
1871         err = snd_opl3_hwdep_new(opl3, 0, 1, NULL);
1872         if (err < 0)
1873                 return err;
1874         snd_cs4281_create_gameport(chip);
1875         strcpy(card->driver, "CS4281");
1876         strcpy(card->shortname, "Cirrus Logic CS4281");
1877         sprintf(card->longname, "%s at 0x%lx, irq %d",
1878                 card->shortname,
1879                 chip->ba0_addr,
1880                 chip->irq);
1881
1882         err = snd_card_register(card);
1883         if (err < 0)
1884                 return err;
1885
1886         pci_set_drvdata(pci, card);
1887         dev++;
1888         return 0;
1889 }
1890
1891 static int snd_cs4281_probe(struct pci_dev *pci,
1892                             const struct pci_device_id *pci_id)
1893 {
1894         return snd_card_free_on_error(&pci->dev, __snd_cs4281_probe(pci, pci_id));
1895 }
1896
1897 /*
1898  * Power Management
1899  */
1900 #ifdef CONFIG_PM_SLEEP
1901
1902 static const int saved_regs[SUSPEND_REGISTERS] = {
1903         BA0_JSCTL,
1904         BA0_GPIOR,
1905         BA0_SSCR,
1906         BA0_MIDCR,
1907         BA0_SRCSA,
1908         BA0_PASR,
1909         BA0_CASR,
1910         BA0_DACSR,
1911         BA0_ADCSR,
1912         BA0_FMLVC,
1913         BA0_FMRVC,
1914         BA0_PPLVC,
1915         BA0_PPRVC,
1916 };
1917
1918 #define CLKCR1_CKRA                             0x00010000L
1919
1920 static int cs4281_suspend(struct device *dev)
1921 {
1922         struct snd_card *card = dev_get_drvdata(dev);
1923         struct cs4281 *chip = card->private_data;
1924         u32 ulCLK;
1925         unsigned int i;
1926
1927         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1928         snd_ac97_suspend(chip->ac97);
1929         snd_ac97_suspend(chip->ac97_secondary);
1930
1931         ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
1932         ulCLK |= CLKCR1_CKRA;
1933         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
1934
1935         /* Disable interrupts. */
1936         snd_cs4281_pokeBA0(chip, BA0_HICR, BA0_HICR_CHGM);
1937
1938         /* remember the status registers */
1939         for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
1940                 if (saved_regs[i])
1941                         chip->suspend_regs[i] = snd_cs4281_peekBA0(chip, saved_regs[i]);
1942
1943         /* Turn off the serial ports. */
1944         snd_cs4281_pokeBA0(chip, BA0_SERMC, 0);
1945
1946         /* Power off FM, Joystick, AC link, */
1947         snd_cs4281_pokeBA0(chip, BA0_SSPM, 0);
1948
1949         /* DLL off. */
1950         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, 0);
1951
1952         /* AC link off. */
1953         snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
1954
1955         ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
1956         ulCLK &= ~CLKCR1_CKRA;
1957         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
1958         return 0;
1959 }
1960
1961 static int cs4281_resume(struct device *dev)
1962 {
1963         struct snd_card *card = dev_get_drvdata(dev);
1964         struct cs4281 *chip = card->private_data;
1965         unsigned int i;
1966         u32 ulCLK;
1967
1968         ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
1969         ulCLK |= CLKCR1_CKRA;
1970         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
1971
1972         snd_cs4281_chip_init(chip);
1973
1974         /* restore the status registers */
1975         for (i = 0; i < ARRAY_SIZE(saved_regs); i++)
1976                 if (saved_regs[i])
1977                         snd_cs4281_pokeBA0(chip, saved_regs[i], chip->suspend_regs[i]);
1978
1979         snd_ac97_resume(chip->ac97);
1980         snd_ac97_resume(chip->ac97_secondary);
1981
1982         ulCLK = snd_cs4281_peekBA0(chip, BA0_CLKCR1);
1983         ulCLK &= ~CLKCR1_CKRA;
1984         snd_cs4281_pokeBA0(chip, BA0_CLKCR1, ulCLK);
1985
1986         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1987         return 0;
1988 }
1989
1990 static SIMPLE_DEV_PM_OPS(cs4281_pm, cs4281_suspend, cs4281_resume);
1991 #define CS4281_PM_OPS   &cs4281_pm
1992 #else
1993 #define CS4281_PM_OPS   NULL
1994 #endif /* CONFIG_PM_SLEEP */
1995
1996 static struct pci_driver cs4281_driver = {
1997         .name = KBUILD_MODNAME,
1998         .id_table = snd_cs4281_ids,
1999         .probe = snd_cs4281_probe,
2000         .driver = {
2001                 .pm = CS4281_PM_OPS,
2002         },
2003 };
2004
2005 module_pci_driver(cs4281_driver);