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TOMOYO Linux Cross Reference
Linux/sound/pci/cs4281.c

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

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