sound/sparc/amd7930.c

   1 /*
   2  * Driver for AMD7930 sound chips found on Sparcs.
   3  * Copyright (C) 2002, 2008 David S. Miller <davem@davemloft.net>
   4  *
   5  * Based entirely upon drivers/sbus/audio/amd7930.c which is:
   6  * Copyright (C) 1996,1997 Thomas K. Dyas (tdyas@eden.rutgers.edu)
   7  *
   8  * --- Notes from Thomas's original driver ---
   9  * This is the lowlevel driver for the AMD7930 audio chip found on all
  10  * sun4c machines and some sun4m machines.
  11  *
  12  * The amd7930 is actually an ISDN chip which has a very simple
  13  * integrated audio encoder/decoder. When Sun decided on what chip to
  14  * use for audio, they had the brilliant idea of using the amd7930 and
  15  * only connecting the audio encoder/decoder pins.
  16  *
  17  * Thanks to the AMD engineer who was able to get us the AMD79C30
  18  * databook which has all the programming information and gain tables.
  19  *
  20  * Advanced Micro Devices' Am79C30A is an ISDN/audio chip used in the
  21  * SparcStation 1+.  The chip provides microphone and speaker interfaces
  22  * which provide mono-channel audio at 8K samples per second via either
  23  * 8-bit A-law or 8-bit mu-law encoding.  Also, the chip features an
  24  * ISDN BRI Line Interface Unit (LIU), I.430 S/T physical interface,
  25  * which performs basic D channel LAPD processing and provides raw
  26  * B channel data.  The digital audio channel, the two ISDN B channels,
  27  * and two 64 Kbps channels to the microprocessor are all interconnected
  28  * via a multiplexer.
  29  * --- End of notes from Thoamas's original driver ---
  30  */
  31
  32 #include <linux/module.h>
  33 #include <linux/kernel.h>
  34 #include <linux/slab.h>
  35 #include <linux/init.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/moduleparam.h>
  38 #include <linux/of.h>
  39 #include <linux/of_device.h>
  40
  41 #include <sound/core.h>
  42 #include <sound/pcm.h>
  43 #include <sound/info.h>
  44 #include <sound/control.h>
  45 #include <sound/initval.h>
  46
  47 #include <asm/io.h>
  48 #include <asm/irq.h>
  49 #include <asm/prom.h>
  50
  51 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;      /* Index 0-MAX */
  52 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  53 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  54
  55 module_param_array(index, int, NULL, 0444);
  56 MODULE_PARM_DESC(index, "Index value for Sun AMD7930 soundcard.");
  57 module_param_array(id, charp, NULL, 0444);
  58 MODULE_PARM_DESC(id, "ID string for Sun AMD7930 soundcard.");
  59 module_param_array(enable, bool, NULL, 0444);
  60 MODULE_PARM_DESC(enable, "Enable Sun AMD7930 soundcard.");
  61 MODULE_AUTHOR("Thomas K. Dyas and David S. Miller");
  62 MODULE_DESCRIPTION("Sun AMD7930");
  63 MODULE_LICENSE("GPL");
  64 MODULE_SUPPORTED_DEVICE("{{Sun,AMD7930}}");
  65
  66 /* Device register layout.  */
  67
  68 /* Register interface presented to the CPU by the amd7930. */
  69 #define AMD7930_CR      0x00UL          /* Command Register (W) */
  70 #define AMD7930_IR      AMD7930_CR      /* Interrupt Register (R) */
  71 #define AMD7930_DR      0x01UL          /* Data Register (R/W) */
  72 #define AMD7930_DSR1    0x02UL          /* D-channel Status Register 1 (R) */
  73 #define AMD7930_DER     0x03UL          /* D-channel Error Register (R) */
  74 #define AMD7930_DCTB    0x04UL          /* D-channel Transmit Buffer (W) */
  75 #define AMD7930_DCRB    AMD7930_DCTB    /* D-channel Receive Buffer (R) */
  76 #define AMD7930_BBTB    0x05UL          /* Bb-channel Transmit Buffer (W) */
  77 #define AMD7930_BBRB    AMD7930_BBTB    /* Bb-channel Receive Buffer (R) */
  78 #define AMD7930_BCTB    0x06UL          /* Bc-channel Transmit Buffer (W) */
  79 #define AMD7930_BCRB    AMD7930_BCTB    /* Bc-channel Receive Buffer (R) */
  80 #define AMD7930_DSR2    0x07UL          /* D-channel Status Register 2 (R) */
  81
  82 /* Indirect registers in the Main Audio Processor. */
  83 struct amd7930_map {
  84         __u16   x[8];
  85         __u16   r[8];
  86         __u16   gx;
  87         __u16   gr;
  88         __u16   ger;
  89         __u16   stgr;
  90         __u16   ftgr;
  91         __u16   atgr;
  92         __u8    mmr1;
  93         __u8    mmr2;
  94 };
  95
  96 /* After an amd7930 interrupt, reading the Interrupt Register (ir)
  97  * clears the interrupt and returns a bitmask indicating which
  98  * interrupt source(s) require service.
  99  */
 100
 101 #define AMR_IR_DTTHRSH                  0x01 /* D-channel xmit threshold */
 102 #define AMR_IR_DRTHRSH                  0x02 /* D-channel recv threshold */
 103 #define AMR_IR_DSRI                     0x04 /* D-channel packet status */
 104 #define AMR_IR_DERI                     0x08 /* D-channel error */
 105 #define AMR_IR_BBUF                     0x10 /* B-channel data xfer */
 106 #define AMR_IR_LSRI                     0x20 /* LIU status */
 107 #define AMR_IR_DSR2I                    0x40 /* D-channel buffer status */
 108 #define AMR_IR_MLTFRMI                  0x80 /* multiframe or PP */
 109
 110 /* The amd7930 has "indirect registers" which are accessed by writing
 111  * the register number into the Command Register and then reading or
 112  * writing values from the Data Register as appropriate. We define the
 113  * AMR_* macros to be the indirect register numbers and AM_* macros to
 114  * be bits in whatever register is referred to.
 115  */
 116
 117 /* Initialization */
 118 #define AMR_INIT                        0x21
 119 #define         AM_INIT_ACTIVE                  0x01
 120 #define         AM_INIT_DATAONLY                0x02
 121 #define         AM_INIT_POWERDOWN               0x03
 122 #define         AM_INIT_DISABLE_INTS            0x04
 123 #define AMR_INIT2                       0x20
 124 #define         AM_INIT2_ENABLE_POWERDOWN       0x20
 125 #define         AM_INIT2_ENABLE_MULTIFRAME      0x10
 126
 127 /* Line Interface Unit */
 128 #define AMR_LIU_LSR                     0xA1
 129 #define         AM_LIU_LSR_STATE                0x07
 130 #define         AM_LIU_LSR_F3                   0x08
 131 #define         AM_LIU_LSR_F7                   0x10
 132 #define         AM_LIU_LSR_F8                   0x20
 133 #define         AM_LIU_LSR_HSW                  0x40
 134 #define         AM_LIU_LSR_HSW_CHG              0x80
 135 #define AMR_LIU_LPR                     0xA2
 136 #define AMR_LIU_LMR1                    0xA3
 137 #define         AM_LIU_LMR1_B1_ENABL            0x01
 138 #define         AM_LIU_LMR1_B2_ENABL            0x02
 139 #define         AM_LIU_LMR1_F_DISABL            0x04
 140 #define         AM_LIU_LMR1_FA_DISABL           0x08
 141 #define         AM_LIU_LMR1_REQ_ACTIV           0x10
 142 #define         AM_LIU_LMR1_F8_F3               0x20
 143 #define         AM_LIU_LMR1_LIU_ENABL           0x40
 144 #define AMR_LIU_LMR2                    0xA4
 145 #define         AM_LIU_LMR2_DECHO               0x01
 146 #define         AM_LIU_LMR2_DLOOP               0x02
 147 #define         AM_LIU_LMR2_DBACKOFF            0x04
 148 #define         AM_LIU_LMR2_EN_F3_INT           0x08
 149 #define         AM_LIU_LMR2_EN_F8_INT           0x10
 150 #define         AM_LIU_LMR2_EN_HSW_INT          0x20
 151 #define         AM_LIU_LMR2_EN_F7_INT           0x40
 152 #define AMR_LIU_2_4                     0xA5
 153 #define AMR_LIU_MF                      0xA6
 154 #define AMR_LIU_MFSB                    0xA7
 155 #define AMR_LIU_MFQB                    0xA8
 156
 157 /* Multiplexor */
 158 #define AMR_MUX_MCR1                    0x41
 159 #define AMR_MUX_MCR2                    0x42
 160 #define AMR_MUX_MCR3                    0x43
 161 #define         AM_MUX_CHANNEL_B1               0x01
 162 #define         AM_MUX_CHANNEL_B2               0x02
 163 #define         AM_MUX_CHANNEL_Ba               0x03
 164 #define         AM_MUX_CHANNEL_Bb               0x04
 165 #define         AM_MUX_CHANNEL_Bc               0x05
 166 #define         AM_MUX_CHANNEL_Bd               0x06
 167 #define         AM_MUX_CHANNEL_Be               0x07
 168 #define         AM_MUX_CHANNEL_Bf               0x08
 169 #define AMR_MUX_MCR4                    0x44
 170 #define         AM_MUX_MCR4_ENABLE_INTS         0x08
 171 #define         AM_MUX_MCR4_REVERSE_Bb          0x10
 172 #define         AM_MUX_MCR4_REVERSE_Bc          0x20
 173 #define AMR_MUX_1_4                     0x45
 174
 175 /* Main Audio Processor */
 176 #define AMR_MAP_X                       0x61
 177 #define AMR_MAP_R                       0x62
 178 #define AMR_MAP_GX                      0x63
 179 #define AMR_MAP_GR                      0x64
 180 #define AMR_MAP_GER                     0x65
 181 #define AMR_MAP_STGR                    0x66
 182 #define AMR_MAP_FTGR_1_2                0x67
 183 #define AMR_MAP_ATGR_1_2                0x68
 184 #define AMR_MAP_MMR1                    0x69
 185 #define         AM_MAP_MMR1_ALAW                0x01
 186 #define         AM_MAP_MMR1_GX                  0x02
 187 #define         AM_MAP_MMR1_GR                  0x04
 188 #define         AM_MAP_MMR1_GER                 0x08
 189 #define         AM_MAP_MMR1_X                   0x10
 190 #define         AM_MAP_MMR1_R                   0x20
 191 #define         AM_MAP_MMR1_STG                 0x40
 192 #define         AM_MAP_MMR1_LOOPBACK            0x80
 193 #define AMR_MAP_MMR2                    0x6A
 194 #define         AM_MAP_MMR2_AINB                0x01
 195 #define         AM_MAP_MMR2_LS                  0x02
 196 #define         AM_MAP_MMR2_ENABLE_DTMF         0x04
 197 #define         AM_MAP_MMR2_ENABLE_TONEGEN      0x08
 198 #define         AM_MAP_MMR2_ENABLE_TONERING     0x10
 199 #define         AM_MAP_MMR2_DISABLE_HIGHPASS    0x20
 200 #define         AM_MAP_MMR2_DISABLE_AUTOZERO    0x40
 201 #define AMR_MAP_1_10                    0x6B
 202 #define AMR_MAP_MMR3                    0x6C
 203 #define AMR_MAP_STRA                    0x6D
 204 #define AMR_MAP_STRF                    0x6E
 205 #define AMR_MAP_PEAKX                   0x70
 206 #define AMR_MAP_PEAKR                   0x71
 207 #define AMR_MAP_15_16                   0x72
 208
 209 /* Data Link Controller */
 210 #define AMR_DLC_FRAR_1_2_3              0x81
 211 #define AMR_DLC_SRAR_1_2_3              0x82
 212 #define AMR_DLC_TAR                     0x83
 213 #define AMR_DLC_DRLR                    0x84
 214 #define AMR_DLC_DTCR                    0x85
 215 #define AMR_DLC_DMR1                    0x86
 216 #define         AMR_DLC_DMR1_DTTHRSH_INT        0x01
 217 #define         AMR_DLC_DMR1_DRTHRSH_INT        0x02
 218 #define         AMR_DLC_DMR1_TAR_ENABL          0x04
 219 #define         AMR_DLC_DMR1_EORP_INT           0x08
 220 #define         AMR_DLC_DMR1_EN_ADDR1           0x10
 221 #define         AMR_DLC_DMR1_EN_ADDR2           0x20
 222 #define         AMR_DLC_DMR1_EN_ADDR3           0x40
 223 #define         AMR_DLC_DMR1_EN_ADDR4           0x80
 224 #define         AMR_DLC_DMR1_EN_ADDRS           0xf0
 225 #define AMR_DLC_DMR2                    0x87
 226 #define         AMR_DLC_DMR2_RABRT_INT          0x01
 227 #define         AMR_DLC_DMR2_RESID_INT          0x02
 228 #define         AMR_DLC_DMR2_COLL_INT           0x04
 229 #define         AMR_DLC_DMR2_FCS_INT            0x08
 230 #define         AMR_DLC_DMR2_OVFL_INT           0x10
 231 #define         AMR_DLC_DMR2_UNFL_INT           0x20
 232 #define         AMR_DLC_DMR2_OVRN_INT           0x40
 233 #define         AMR_DLC_DMR2_UNRN_INT           0x80
 234 #define AMR_DLC_1_7                     0x88
 235 #define AMR_DLC_DRCR                    0x89
 236 #define AMR_DLC_RNGR1                   0x8A
 237 #define AMR_DLC_RNGR2                   0x8B
 238 #define AMR_DLC_FRAR4                   0x8C
 239 #define AMR_DLC_SRAR4                   0x8D
 240 #define AMR_DLC_DMR3                    0x8E
 241 #define         AMR_DLC_DMR3_VA_INT             0x01
 242 #define         AMR_DLC_DMR3_EOTP_INT           0x02
 243 #define         AMR_DLC_DMR3_LBRP_INT           0x04
 244 #define         AMR_DLC_DMR3_RBA_INT            0x08
 245 #define         AMR_DLC_DMR3_LBT_INT            0x10
 246 #define         AMR_DLC_DMR3_TBE_INT            0x20
 247 #define         AMR_DLC_DMR3_RPLOST_INT         0x40
 248 #define         AMR_DLC_DMR3_KEEP_FCS           0x80
 249 #define AMR_DLC_DMR4                    0x8F
 250 #define         AMR_DLC_DMR4_RCV_1              0x00
 251 #define         AMR_DLC_DMR4_RCV_2              0x01
 252 #define         AMR_DLC_DMR4_RCV_4              0x02
 253 #define         AMR_DLC_DMR4_RCV_8              0x03
 254 #define         AMR_DLC_DMR4_RCV_16             0x01
 255 #define         AMR_DLC_DMR4_RCV_24             0x02
 256 #define         AMR_DLC_DMR4_RCV_30             0x03
 257 #define         AMR_DLC_DMR4_XMT_1              0x00
 258 #define         AMR_DLC_DMR4_XMT_2              0x04
 259 #define         AMR_DLC_DMR4_XMT_4              0x08
 260 #define         AMR_DLC_DMR4_XMT_8              0x0c
 261 #define         AMR_DLC_DMR4_XMT_10             0x08
 262 #define         AMR_DLC_DMR4_XMT_14             0x0c
 263 #define         AMR_DLC_DMR4_IDLE_MARK          0x00
 264 #define         AMR_DLC_DMR4_IDLE_FLAG          0x10
 265 #define         AMR_DLC_DMR4_ADDR_BOTH          0x00
 266 #define         AMR_DLC_DMR4_ADDR_1ST           0x20
 267 #define         AMR_DLC_DMR4_ADDR_2ND           0xa0
 268 #define         AMR_DLC_DMR4_CR_ENABLE          0x40
 269 #define AMR_DLC_12_15                   0x90
 270 #define AMR_DLC_ASR                     0x91
 271 #define AMR_DLC_EFCR                    0x92
 272 #define         AMR_DLC_EFCR_EXTEND_FIFO        0x01
 273 #define         AMR_DLC_EFCR_SEC_PKT_INT        0x02
 274
 275 #define AMR_DSR1_VADDR                  0x01
 276 #define AMR_DSR1_EORP                   0x02
 277 #define AMR_DSR1_PKT_IP                 0x04
 278 #define AMR_DSR1_DECHO_ON               0x08
 279 #define AMR_DSR1_DLOOP_ON               0x10
 280 #define AMR_DSR1_DBACK_OFF              0x20
 281 #define AMR_DSR1_EOTP                   0x40
 282 #define AMR_DSR1_CXMT_ABRT              0x80
 283
 284 #define AMR_DSR2_LBRP                   0x01
 285 #define AMR_DSR2_RBA                    0x02
 286 #define AMR_DSR2_RPLOST                 0x04
 287 #define AMR_DSR2_LAST_BYTE              0x08
 288 #define AMR_DSR2_TBE                    0x10
 289 #define AMR_DSR2_MARK_IDLE              0x20
 290 #define AMR_DSR2_FLAG_IDLE              0x40
 291 #define AMR_DSR2_SECOND_PKT             0x80
 292
 293 #define AMR_DER_RABRT                   0x01
 294 #define AMR_DER_RFRAME                  0x02
 295 #define AMR_DER_COLLISION               0x04
 296 #define AMR_DER_FCS                     0x08
 297 #define AMR_DER_OVFL                    0x10
 298 #define AMR_DER_UNFL                    0x20
 299 #define AMR_DER_OVRN                    0x40
 300 #define AMR_DER_UNRN                    0x80
 301
 302 /* Peripheral Port */
 303 #define AMR_PP_PPCR1                    0xC0
 304 #define AMR_PP_PPSR                     0xC1
 305 #define AMR_PP_PPIER                    0xC2
 306 #define AMR_PP_MTDR                     0xC3
 307 #define AMR_PP_MRDR                     0xC3
 308 #define AMR_PP_CITDR0                   0xC4
 309 #define AMR_PP_CIRDR0                   0xC4
 310 #define AMR_PP_CITDR1                   0xC5
 311 #define AMR_PP_CIRDR1                   0xC5
 312 #define AMR_PP_PPCR2                    0xC8
 313 #define AMR_PP_PPCR3                    0xC9
 314
 315 struct snd_amd7930 {
 316         spinlock_t              lock;
 317         void __iomem            *regs;
 318         u32                     flags;
 319 #define AMD7930_FLAG_PLAYBACK   0x00000001
 320 #define AMD7930_FLAG_CAPTURE    0x00000002
 321
 322         struct amd7930_map      map;
 323
 324         struct snd_card         *card;
 325         struct snd_pcm          *pcm;
 326         struct snd_pcm_substream        *playback_substream;
 327         struct snd_pcm_substream        *capture_substream;
 328
 329         /* Playback/Capture buffer state. */
 330         unsigned char           *p_orig, *p_cur;
 331         int                     p_left;
 332         unsigned char           *c_orig, *c_cur;
 333         int                     c_left;
 334
 335         int                     rgain;
 336         int                     pgain;
 337         int                     mgain;
 338
 339         struct of_device        *op;
 340         unsigned int            irq;
 341         struct snd_amd7930      *next;
 342 };
 343
 344 static struct snd_amd7930 *amd7930_list;
 345
 346 /* Idle the AMD7930 chip.  The amd->lock is not held.  */
 347 static __inline__ void amd7930_idle(struct snd_amd7930 *amd)
 348 {
 349         unsigned long flags;
 350
 351         spin_lock_irqsave(&amd->lock, flags);
 352         sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
 353         sbus_writeb(0, amd->regs + AMD7930_DR);
 354         spin_unlock_irqrestore(&amd->lock, flags);
 355 }
 356
 357 /* Enable chip interrupts.  The amd->lock is not held.  */
 358 static __inline__ void amd7930_enable_ints(struct snd_amd7930 *amd)
 359 {
 360         unsigned long flags;
 361
 362         spin_lock_irqsave(&amd->lock, flags);
 363         sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
 364         sbus_writeb(AM_INIT_ACTIVE, amd->regs + AMD7930_DR);
 365         spin_unlock_irqrestore(&amd->lock, flags);
 366 }
 367
 368 /* Disable chip interrupts.  The amd->lock is not held.  */
 369 static __inline__ void amd7930_disable_ints(struct snd_amd7930 *amd)
 370 {
 371         unsigned long flags;
 372
 373         spin_lock_irqsave(&amd->lock, flags);
 374         sbus_writeb(AMR_INIT, amd->regs + AMD7930_CR);
 375         sbus_writeb(AM_INIT_ACTIVE | AM_INIT_DISABLE_INTS, amd->regs + AMD7930_DR);
 376         spin_unlock_irqrestore(&amd->lock, flags);
 377 }
 378
 379 /* Commit amd7930_map settings to the hardware.
 380  * The amd->lock is held and local interrupts are disabled.
 381  */
 382 static void __amd7930_write_map(struct snd_amd7930 *amd)
 383 {
 384         struct amd7930_map *map = &amd->map;
 385
 386         sbus_writeb(AMR_MAP_GX, amd->regs + AMD7930_CR);
 387         sbus_writeb(((map->gx >> 0) & 0xff), amd->regs + AMD7930_DR);
 388         sbus_writeb(((map->gx >> 8) & 0xff), amd->regs + AMD7930_DR);
 389
 390         sbus_writeb(AMR_MAP_GR, amd->regs + AMD7930_CR);
 391         sbus_writeb(((map->gr >> 0) & 0xff), amd->regs + AMD7930_DR);
 392         sbus_writeb(((map->gr >> 8) & 0xff), amd->regs + AMD7930_DR);
 393
 394         sbus_writeb(AMR_MAP_STGR, amd->regs + AMD7930_CR);
 395         sbus_writeb(((map->stgr >> 0) & 0xff), amd->regs + AMD7930_DR);
 396         sbus_writeb(((map->stgr >> 8) & 0xff), amd->regs + AMD7930_DR);
 397
 398         sbus_writeb(AMR_MAP_GER, amd->regs + AMD7930_CR);
 399         sbus_writeb(((map->ger >> 0) & 0xff), amd->regs + AMD7930_DR);
 400         sbus_writeb(((map->ger >> 8) & 0xff), amd->regs + AMD7930_DR);
 401
 402         sbus_writeb(AMR_MAP_MMR1, amd->regs + AMD7930_CR);
 403         sbus_writeb(map->mmr1, amd->regs + AMD7930_DR);
 404
 405         sbus_writeb(AMR_MAP_MMR2, amd->regs + AMD7930_CR);
 406         sbus_writeb(map->mmr2, amd->regs + AMD7930_DR);
 407 }
 408
 409 /* gx, gr & stg gains.  this table must contain 256 elements with
 410  * the 0th being "infinity" (the magic value 9008).  The remaining
 411  * elements match sun's gain curve (but with higher resolution):
 412  * -18 to 0dB in .16dB steps then 0 to 12dB in .08dB steps.
 413  */
 414 static __const__ __u16 gx_coeff[256] = {
 415         0x9008, 0x8b7c, 0x8b51, 0x8b45, 0x8b42, 0x8b3b, 0x8b36, 0x8b33,
 416         0x8b32, 0x8b2a, 0x8b2b, 0x8b2c, 0x8b25, 0x8b23, 0x8b22, 0x8b22,
 417         0x9122, 0x8b1a, 0x8aa3, 0x8aa3, 0x8b1c, 0x8aa6, 0x912d, 0x912b,
 418         0x8aab, 0x8b12, 0x8aaa, 0x8ab2, 0x9132, 0x8ab4, 0x913c, 0x8abb,
 419         0x9142, 0x9144, 0x9151, 0x8ad5, 0x8aeb, 0x8a79, 0x8a5a, 0x8a4a,
 420         0x8b03, 0x91c2, 0x91bb, 0x8a3f, 0x8a33, 0x91b2, 0x9212, 0x9213,
 421         0x8a2c, 0x921d, 0x8a23, 0x921a, 0x9222, 0x9223, 0x922d, 0x9231,
 422         0x9234, 0x9242, 0x925b, 0x92dd, 0x92c1, 0x92b3, 0x92ab, 0x92a4,
 423         0x92a2, 0x932b, 0x9341, 0x93d3, 0x93b2, 0x93a2, 0x943c, 0x94b2,
 424         0x953a, 0x9653, 0x9782, 0x9e21, 0x9d23, 0x9cd2, 0x9c23, 0x9baa,
 425         0x9bde, 0x9b33, 0x9b22, 0x9b1d, 0x9ab2, 0xa142, 0xa1e5, 0x9a3b,
 426         0xa213, 0xa1a2, 0xa231, 0xa2eb, 0xa313, 0xa334, 0xa421, 0xa54b,
 427         0xada4, 0xac23, 0xab3b, 0xaaab, 0xaa5c, 0xb1a3, 0xb2ca, 0xb3bd,
 428         0xbe24, 0xbb2b, 0xba33, 0xc32b, 0xcb5a, 0xd2a2, 0xe31d, 0x0808,
 429         0x72ba, 0x62c2, 0x5c32, 0x52db, 0x513e, 0x4cce, 0x43b2, 0x4243,
 430         0x41b4, 0x3b12, 0x3bc3, 0x3df2, 0x34bd, 0x3334, 0x32c2, 0x3224,
 431         0x31aa, 0x2a7b, 0x2aaa, 0x2b23, 0x2bba, 0x2c42, 0x2e23, 0x25bb,
 432         0x242b, 0x240f, 0x231a, 0x22bb, 0x2241, 0x2223, 0x221f, 0x1a33,
 433         0x1a4a, 0x1acd, 0x2132, 0x1b1b, 0x1b2c, 0x1b62, 0x1c12, 0x1c32,
 434         0x1d1b, 0x1e71, 0x16b1, 0x1522, 0x1434, 0x1412, 0x1352, 0x1323,
 435         0x1315, 0x12bc, 0x127a, 0x1235, 0x1226, 0x11a2, 0x1216, 0x0a2a,
 436         0x11bc, 0x11d1, 0x1163, 0x0ac2, 0x0ab2, 0x0aab, 0x0b1b, 0x0b23,
 437         0x0b33, 0x0c0f, 0x0bb3, 0x0c1b, 0x0c3e, 0x0cb1, 0x0d4c, 0x0ec1,
 438         0x079a, 0x0614, 0x0521, 0x047c, 0x0422, 0x03b1, 0x03e3, 0x0333,
 439         0x0322, 0x031c, 0x02aa, 0x02ba, 0x02f2, 0x0242, 0x0232, 0x0227,
 440         0x0222, 0x021b, 0x01ad, 0x0212, 0x01b2, 0x01bb, 0x01cb, 0x01f6,
 441         0x0152, 0x013a, 0x0133, 0x0131, 0x012c, 0x0123, 0x0122, 0x00a2,
 442         0x011b, 0x011e, 0x0114, 0x00b1, 0x00aa, 0x00b3, 0x00bd, 0x00ba,
 443         0x00c5, 0x00d3, 0x00f3, 0x0062, 0x0051, 0x0042, 0x003b, 0x0033,
 444         0x0032, 0x002a, 0x002c, 0x0025, 0x0023, 0x0022, 0x001a, 0x0021,
 445         0x001b, 0x001b, 0x001d, 0x0015, 0x0013, 0x0013, 0x0012, 0x0012,
 446         0x000a, 0x000a, 0x0011, 0x0011, 0x000b, 0x000b, 0x000c, 0x000e,
 447 };
 448
 449 static __const__ __u16 ger_coeff[] = {
 450         0x431f, /* 5. dB */
 451         0x331f, /* 5.5 dB */
 452         0x40dd, /* 6. dB */
 453         0x11dd, /* 6.5 dB */
 454         0x440f, /* 7. dB */
 455         0x411f, /* 7.5 dB */
 456         0x311f, /* 8. dB */
 457         0x5520, /* 8.5 dB */
 458         0x10dd, /* 9. dB */
 459         0x4211, /* 9.5 dB */
 460         0x410f, /* 10. dB */
 461         0x111f, /* 10.5 dB */
 462         0x600b, /* 11. dB */
 463         0x00dd, /* 11.5 dB */
 464         0x4210, /* 12. dB */
 465         0x110f, /* 13. dB */
 466         0x7200, /* 14. dB */
 467         0x2110, /* 15. dB */
 468         0x2200, /* 15.9 dB */
 469         0x000b, /* 16.9 dB */
 470         0x000f  /* 18. dB */
 471 };
 472
 473 /* Update amd7930_map settings and program them into the hardware.
 474  * The amd->lock is held and local interrupts are disabled.
 475  */
 476 static void __amd7930_update_map(struct snd_amd7930 *amd)
 477 {
 478         struct amd7930_map *map = &amd->map;
 479         int level;
 480
 481         map->gx = gx_coeff[amd->rgain];
 482         map->stgr = gx_coeff[amd->mgain];
 483         level = (amd->pgain * (256 + ARRAY_SIZE(ger_coeff))) >> 8;
 484         if (level >= 256) {
 485                 map->ger = ger_coeff[level - 256];
 486                 map->gr = gx_coeff[255];
 487         } else {
 488                 map->ger = ger_coeff[0];
 489                 map->gr = gx_coeff[level];
 490         }
 491         __amd7930_write_map(amd);
 492 }
 493
 494 static irqreturn_t snd_amd7930_interrupt(int irq, void *dev_id)
 495 {
 496         struct snd_amd7930 *amd = dev_id;
 497         unsigned int elapsed;
 498         u8 ir;
 499
 500         spin_lock(&amd->lock);
 501
 502         elapsed = 0;
 503
 504         ir = sbus_readb(amd->regs + AMD7930_IR);
 505         if (ir & AMR_IR_BBUF) {
 506                 u8 byte;
 507
 508                 if (amd->flags & AMD7930_FLAG_PLAYBACK) {
 509                         if (amd->p_left > 0) {
 510                                 byte = *(amd->p_cur++);
 511                                 amd->p_left--;
 512                                 sbus_writeb(byte, amd->regs + AMD7930_BBTB);
 513                                 if (amd->p_left == 0)
 514                                         elapsed |= AMD7930_FLAG_PLAYBACK;
 515                         } else
 516                                 sbus_writeb(0, amd->regs + AMD7930_BBTB);
 517                 } else if (amd->flags & AMD7930_FLAG_CAPTURE) {
 518                         byte = sbus_readb(amd->regs + AMD7930_BBRB);
 519                         if (amd->c_left > 0) {
 520                                 *(amd->c_cur++) = byte;
 521                                 amd->c_left--;
 522                                 if (amd->c_left == 0)
 523                                         elapsed |= AMD7930_FLAG_CAPTURE;
 524                         }
 525                 }
 526         }
 527         spin_unlock(&amd->lock);
 528
 529         if (elapsed & AMD7930_FLAG_PLAYBACK)
 530                 snd_pcm_period_elapsed(amd->playback_substream);
 531         else
 532                 snd_pcm_period_elapsed(amd->capture_substream);
 533
 534         return IRQ_HANDLED;
 535 }
 536
 537 static int snd_amd7930_trigger(struct snd_amd7930 *amd, unsigned int flag, int cmd)
 538 {
 539         unsigned long flags;
 540         int result = 0;
 541
 542         spin_lock_irqsave(&amd->lock, flags);
 543         if (cmd == SNDRV_PCM_TRIGGER_START) {
 544                 if (!(amd->flags & flag)) {
 545                         amd->flags |= flag;
 546
 547                         /* Enable B channel interrupts.  */
 548                         sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
 549                         sbus_writeb(AM_MUX_MCR4_ENABLE_INTS, amd->regs + AMD7930_DR);
 550                 }
 551         } else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 552                 if (amd->flags & flag) {
 553                         amd->flags &= ~flag;
 554
 555                         /* Disable B channel interrupts.  */
 556                         sbus_writeb(AMR_MUX_MCR4, amd->regs + AMD7930_CR);
 557                         sbus_writeb(0, amd->regs + AMD7930_DR);
 558                 }
 559         } else {
 560                 result = -EINVAL;
 561         }
 562         spin_unlock_irqrestore(&amd->lock, flags);
 563
 564         return result;
 565 }
 566
 567 static int snd_amd7930_playback_trigger(struct snd_pcm_substream *substream,
 568                                         int cmd)
 569 {
 570         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 571         return snd_amd7930_trigger(amd, AMD7930_FLAG_PLAYBACK, cmd);
 572 }
 573
 574 static int snd_amd7930_capture_trigger(struct snd_pcm_substream *substream,
 575                                        int cmd)
 576 {
 577         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 578         return snd_amd7930_trigger(amd, AMD7930_FLAG_CAPTURE, cmd);
 579 }
 580
 581 static int snd_amd7930_playback_prepare(struct snd_pcm_substream *substream)
 582 {
 583         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 584         struct snd_pcm_runtime *runtime = substream->runtime;
 585         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 586         unsigned long flags;
 587         u8 new_mmr1;
 588
 589         spin_lock_irqsave(&amd->lock, flags);
 590
 591         amd->flags |= AMD7930_FLAG_PLAYBACK;
 592
 593         /* Setup the pseudo-dma transfer pointers.  */
 594         amd->p_orig = amd->p_cur = runtime->dma_area;
 595         amd->p_left = size;
 596
 597         /* Put the chip into the correct encoding format.  */
 598         new_mmr1 = amd->map.mmr1;
 599         if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
 600                 new_mmr1 |= AM_MAP_MMR1_ALAW;
 601         else
 602                 new_mmr1 &= ~AM_MAP_MMR1_ALAW;
 603         if (new_mmr1 != amd->map.mmr1) {
 604                 amd->map.mmr1 = new_mmr1;
 605                 __amd7930_update_map(amd);
 606         }
 607
 608         spin_unlock_irqrestore(&amd->lock, flags);
 609
 610         return 0;
 611 }
 612
 613 static int snd_amd7930_capture_prepare(struct snd_pcm_substream *substream)
 614 {
 615         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 616         struct snd_pcm_runtime *runtime = substream->runtime;
 617         unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 618         unsigned long flags;
 619         u8 new_mmr1;
 620
 621         spin_lock_irqsave(&amd->lock, flags);
 622
 623         amd->flags |= AMD7930_FLAG_CAPTURE;
 624
 625         /* Setup the pseudo-dma transfer pointers.  */
 626         amd->c_orig = amd->c_cur = runtime->dma_area;
 627         amd->c_left = size;
 628
 629         /* Put the chip into the correct encoding format.  */
 630         new_mmr1 = amd->map.mmr1;
 631         if (runtime->format == SNDRV_PCM_FORMAT_A_LAW)
 632                 new_mmr1 |= AM_MAP_MMR1_ALAW;
 633         else
 634                 new_mmr1 &= ~AM_MAP_MMR1_ALAW;
 635         if (new_mmr1 != amd->map.mmr1) {
 636                 amd->map.mmr1 = new_mmr1;
 637                 __amd7930_update_map(amd);
 638         }
 639
 640         spin_unlock_irqrestore(&amd->lock, flags);
 641
 642         return 0;
 643 }
 644
 645 static snd_pcm_uframes_t snd_amd7930_playback_pointer(struct snd_pcm_substream *substream)
 646 {
 647         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 648         size_t ptr;
 649
 650         if (!(amd->flags & AMD7930_FLAG_PLAYBACK))
 651                 return 0;
 652         ptr = amd->p_cur - amd->p_orig;
 653         return bytes_to_frames(substream->runtime, ptr);
 654 }
 655
 656 static snd_pcm_uframes_t snd_amd7930_capture_pointer(struct snd_pcm_substream *substream)
 657 {
 658         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 659         size_t ptr;
 660
 661         if (!(amd->flags & AMD7930_FLAG_CAPTURE))
 662                 return 0;
 663
 664         ptr = amd->c_cur - amd->c_orig;
 665         return bytes_to_frames(substream->runtime, ptr);
 666 }
 667
 668 /* Playback and capture have identical properties.  */
 669 static struct snd_pcm_hardware snd_amd7930_pcm_hw =
 670 {
 671         .info                   = (SNDRV_PCM_INFO_MMAP |
 672                                    SNDRV_PCM_INFO_MMAP_VALID |
 673                                    SNDRV_PCM_INFO_INTERLEAVED |
 674                                    SNDRV_PCM_INFO_BLOCK_TRANSFER |
 675                                    SNDRV_PCM_INFO_HALF_DUPLEX),
 676         .formats                = SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW,
 677         .rates                  = SNDRV_PCM_RATE_8000,
 678         .rate_min               = 8000,
 679         .rate_max               = 8000,
 680         .channels_min           = 1,
 681         .channels_max           = 1,
 682         .buffer_bytes_max       = (64*1024),
 683         .period_bytes_min       = 1,
 684         .period_bytes_max       = (64*1024),
 685         .periods_min            = 1,
 686         .periods_max            = 1024,
 687 };
 688
 689 static int snd_amd7930_playback_open(struct snd_pcm_substream *substream)
 690 {
 691         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 692         struct snd_pcm_runtime *runtime = substream->runtime;
 693
 694         amd->playback_substream = substream;
 695         runtime->hw = snd_amd7930_pcm_hw;
 696         return 0;
 697 }
 698
 699 static int snd_amd7930_capture_open(struct snd_pcm_substream *substream)
 700 {
 701         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 702         struct snd_pcm_runtime *runtime = substream->runtime;
 703
 704         amd->capture_substream = substream;
 705         runtime->hw = snd_amd7930_pcm_hw;
 706         return 0;
 707 }
 708
 709 static int snd_amd7930_playback_close(struct snd_pcm_substream *substream)
 710 {
 711         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 712
 713         amd->playback_substream = NULL;
 714         return 0;
 715 }
 716
 717 static int snd_amd7930_capture_close(struct snd_pcm_substream *substream)
 718 {
 719         struct snd_amd7930 *amd = snd_pcm_substream_chip(substream);
 720
 721         amd->capture_substream = NULL;
 722         return 0;
 723 }
 724
 725 static int snd_amd7930_hw_params(struct snd_pcm_substream *substream,
 726                                     struct snd_pcm_hw_params *hw_params)
 727 {
 728         return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 729 }
 730
 731 static int snd_amd7930_hw_free(struct snd_pcm_substream *substream)
 732 {
 733         return snd_pcm_lib_free_pages(substream);
 734 }
 735
 736 static struct snd_pcm_ops snd_amd7930_playback_ops = {
 737         .open           =       snd_amd7930_playback_open,
 738         .close          =       snd_amd7930_playback_close,
 739         .ioctl          =       snd_pcm_lib_ioctl,
 740         .hw_params      =       snd_amd7930_hw_params,
 741         .hw_free        =       snd_amd7930_hw_free,
 742         .prepare        =       snd_amd7930_playback_prepare,
 743         .trigger        =       snd_amd7930_playback_trigger,
 744         .pointer        =       snd_amd7930_playback_pointer,
 745 };
 746
 747 static struct snd_pcm_ops snd_amd7930_capture_ops = {
 748         .open           =       snd_amd7930_capture_open,
 749         .close          =       snd_amd7930_capture_close,
 750         .ioctl          =       snd_pcm_lib_ioctl,
 751         .hw_params      =       snd_amd7930_hw_params,
 752         .hw_free        =       snd_amd7930_hw_free,
 753         .prepare        =       snd_amd7930_capture_prepare,
 754         .trigger        =       snd_amd7930_capture_trigger,
 755         .pointer        =       snd_amd7930_capture_pointer,
 756 };
 757
 758 static int __devinit snd_amd7930_pcm(struct snd_amd7930 *amd)
 759 {
 760         struct snd_pcm *pcm;
 761         int err;
 762
 763         if ((err = snd_pcm_new(amd->card,
 764                                /* ID */             "sun_amd7930",
 765                                /* device */         0,
 766                                /* playback count */ 1,
 767                                /* capture count */  1, &pcm)) < 0)
 768                 return err;
 769
 770         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_amd7930_playback_ops);
 771         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_amd7930_capture_ops);
 772
 773         pcm->private_data = amd;
 774         pcm->info_flags = 0;
 775         strcpy(pcm->name, amd->card->shortname);
 776         amd->pcm = pcm;
 777
 778         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS,
 779                                               snd_dma_continuous_data(GFP_KERNEL),
 780                                               64*1024, 64*1024);
 781
 782         return 0;
 783 }
 784
 785 #define VOLUME_MONITOR  0
 786 #define VOLUME_CAPTURE  1
 787 #define VOLUME_PLAYBACK 2
 788
 789 static int snd_amd7930_info_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo)
 790 {
 791         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 792         uinfo->count = 1;
 793         uinfo->value.integer.min = 0;
 794         uinfo->value.integer.max = 255;
 795
 796         return 0;
 797 }
 798
 799 static int snd_amd7930_get_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
 800 {
 801         struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
 802         int type = kctl->private_value;
 803         int *swval;
 804
 805         switch (type) {
 806         case VOLUME_MONITOR:
 807                 swval = &amd->mgain;
 808                 break;
 809         case VOLUME_CAPTURE:
 810                 swval = &amd->rgain;
 811                 break;
 812         case VOLUME_PLAYBACK:
 813         default:
 814                 swval = &amd->pgain;
 815                 break;
 816         };
 817
 818         ucontrol->value.integer.value[0] = *swval;
 819
 820         return 0;
 821 }
 822
 823 static int snd_amd7930_put_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol)
 824 {
 825         struct snd_amd7930 *amd = snd_kcontrol_chip(kctl);
 826         unsigned long flags;
 827         int type = kctl->private_value;
 828         int *swval, change;
 829
 830         switch (type) {
 831         case VOLUME_MONITOR:
 832                 swval = &amd->mgain;
 833                 break;
 834         case VOLUME_CAPTURE:
 835                 swval = &amd->rgain;
 836                 break;
 837         case VOLUME_PLAYBACK:
 838         default:
 839                 swval = &amd->pgain;
 840                 break;
 841         };
 842
 843         spin_lock_irqsave(&amd->lock, flags);
 844
 845         if (*swval != ucontrol->value.integer.value[0]) {
 846                 *swval = ucontrol->value.integer.value[0] & 0xff;
 847                 __amd7930_update_map(amd);
 848                 change = 1;
 849         } else
 850                 change = 0;
 851
 852         spin_unlock_irqrestore(&amd->lock, flags);
 853
 854         return change;
 855 }
 856
 857 static struct snd_kcontrol_new amd7930_controls[] __devinitdata = {
 858         {
 859                 .iface          =       SNDRV_CTL_ELEM_IFACE_MIXER,
 860                 .name           =       "Monitor Volume",
 861                 .index          =       0,
 862                 .info           =       snd_amd7930_info_volume,
 863                 .get            =       snd_amd7930_get_volume,
 864                 .put            =       snd_amd7930_put_volume,
 865                 .private_value  =       VOLUME_MONITOR,
 866         },
 867         {
 868                 .iface          =       SNDRV_CTL_ELEM_IFACE_MIXER,
 869                 .name           =       "Capture Volume",
 870                 .index          =       0,
 871                 .info           =       snd_amd7930_info_volume,
 872                 .get            =       snd_amd7930_get_volume,
 873                 .put            =       snd_amd7930_put_volume,
 874                 .private_value  =       VOLUME_CAPTURE,
 875         },
 876         {
 877                 .iface          =       SNDRV_CTL_ELEM_IFACE_MIXER,
 878                 .name           =       "Playback Volume",
 879                 .index          =       0,
 880                 .info           =       snd_amd7930_info_volume,
 881                 .get            =       snd_amd7930_get_volume,
 882                 .put            =       snd_amd7930_put_volume,
 883                 .private_value  =       VOLUME_PLAYBACK,
 884         },
 885 };
 886
 887 static int __devinit snd_amd7930_mixer(struct snd_amd7930 *amd)
 888 {
 889         struct snd_card *card;
 890         int idx, err;
 891
 892         if (snd_BUG_ON(!amd || !amd->card))
 893                 return -EINVAL;
 894
 895         card = amd->card;
 896         strcpy(card->mixername, card->shortname);
 897
 898         for (idx = 0; idx < ARRAY_SIZE(amd7930_controls); idx++) {
 899                 if ((err = snd_ctl_add(card,
 900                                        snd_ctl_new1(&amd7930_controls[idx], amd))) < 0)
 901                         return err;
 902         }
 903
 904         return 0;
 905 }
 906
 907 static int snd_amd7930_free(struct snd_amd7930 *amd)
 908 {
 909         struct of_device *op = amd->op;
 910
 911         amd7930_idle(amd);
 912
 913         if (amd->irq)
 914                 free_irq(amd->irq, amd);
 915
 916         if (amd->regs)
 917                 of_iounmap(&op->resource[0], amd->regs,
 918                            resource_size(&op->resource[0]));
 919
 920         kfree(amd);
 921
 922         return 0;
 923 }
 924
 925 static int snd_amd7930_dev_free(struct snd_device *device)
 926 {
 927         struct snd_amd7930 *amd = device->device_data;
 928
 929         return snd_amd7930_free(amd);
 930 }
 931
 932 static struct snd_device_ops snd_amd7930_dev_ops = {
 933         .dev_free       =       snd_amd7930_dev_free,
 934 };
 935
 936 static int __devinit snd_amd7930_create(struct snd_card *card,
 937                                         struct of_device *op,
 938                                         int irq, int dev,
 939                                         struct snd_amd7930 **ramd)
 940 {
 941         struct snd_amd7930 *amd;
 942         unsigned long flags;
 943         int err;
 944
 945         *ramd = NULL;
 946         amd = kzalloc(sizeof(*amd), GFP_KERNEL);
 947         if (amd == NULL)
 948                 return -ENOMEM;
 949
 950         spin_lock_init(&amd->lock);
 951         amd->card = card;
 952         amd->op = op;
 953
 954         amd->regs = of_ioremap(&op->resource[0], 0,
 955                                resource_size(&op->resource[0]), "amd7930");
 956         if (!amd->regs) {
 957                 snd_printk(KERN_ERR
 958                            "amd7930-%d: Unable to map chip registers.\n", dev);
 959                 return -EIO;
 960         }
 961
 962         amd7930_idle(amd);
 963
 964         if (request_irq(irq, snd_amd7930_interrupt,
 965                         IRQF_DISABLED | IRQF_SHARED, "amd7930", amd)) {
 966                 snd_printk(KERN_ERR "amd7930-%d: Unable to grab IRQ %d\n",
 967                            dev, irq);
 968                 snd_amd7930_free(amd);
 969                 return -EBUSY;
 970         }
 971         amd->irq = irq;
 972
 973         amd7930_enable_ints(amd);
 974
 975         spin_lock_irqsave(&amd->lock, flags);
 976
 977         amd->rgain = 128;
 978         amd->pgain = 200;
 979         amd->mgain = 0;
 980
 981         memset(&amd->map, 0, sizeof(amd->map));
 982         amd->map.mmr1 = (AM_MAP_MMR1_GX | AM_MAP_MMR1_GER |
 983                          AM_MAP_MMR1_GR | AM_MAP_MMR1_STG);
 984         amd->map.mmr2 = (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB);
 985
 986         __amd7930_update_map(amd);
 987
 988         /* Always MUX audio (Ba) to channel Bb. */
 989         sbus_writeb(AMR_MUX_MCR1, amd->regs + AMD7930_CR);
 990         sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4),
 991                     amd->regs + AMD7930_DR);
 992
 993         spin_unlock_irqrestore(&amd->lock, flags);
 994
 995         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
 996                                   amd, &snd_amd7930_dev_ops)) < 0) {
 997                 snd_amd7930_free(amd);
 998                 return err;
 999         }
1000
1001         *ramd = amd;
1002         return 0;
1003 }
1004
1005 static int __devinit amd7930_sbus_probe(struct of_device *op, const struct of_device_id *match)
1006 {
1007         struct resource *rp = &op->resource[0];
1008         static int dev_num;
1009         struct snd_card *card;
1010         struct snd_amd7930 *amd;
1011         int err, irq;
1012
1013         irq = op->irqs[0];
1014
1015         if (dev_num >= SNDRV_CARDS)
1016                 return -ENODEV;
1017         if (!enable[dev_num]) {
1018                 dev_num++;
1019                 return -ENOENT;
1020         }
1021
1022         err = snd_card_create(index[dev_num], id[dev_num], THIS_MODULE, 0,
1023                               &card);
1024         if (err < 0)
1025                 return err;
1026
1027         strcpy(card->driver, "AMD7930");
1028         strcpy(card->shortname, "Sun AMD7930");
1029         sprintf(card->longname, "%s at 0x%02lx:0x%08Lx, irq %d",
1030                 card->shortname,
1031                 rp->flags & 0xffL,
1032                 (unsigned long long)rp->start,
1033                 irq);
1034
1035         if ((err = snd_amd7930_create(card, op,
1036                                       irq, dev_num, &amd)) < 0)
1037                 goto out_err;
1038
1039         if ((err = snd_amd7930_pcm(amd)) < 0)
1040                 goto out_err;
1041
1042         if ((err = snd_amd7930_mixer(amd)) < 0)
1043                 goto out_err;
1044
1045         if ((err = snd_card_register(card)) < 0)
1046                 goto out_err;
1047
1048         amd->next = amd7930_list;
1049         amd7930_list = amd;
1050
1051         dev_num++;
1052
1053         return 0;
1054
1055 out_err:
1056         snd_card_free(card);
1057         return err;
1058 }
1059
1060 static const struct of_device_id amd7930_match[] = {
1061         {
1062                 .name = "audio",
1063         },
1064         {},
1065 };
1066
1067 static struct of_platform_driver amd7930_sbus_driver = {
1068         .name           = "audio",
1069         .match_table    = amd7930_match,
1070         .probe          = amd7930_sbus_probe,
1071 };
1072
1073 static int __init amd7930_init(void)
1074 {
1075         return of_register_driver(&amd7930_sbus_driver, &of_bus_type);
1076 }
1077
1078 static void __exit amd7930_exit(void)
1079 {
1080         struct snd_amd7930 *p = amd7930_list;
1081
1082         while (p != NULL) {
1083                 struct snd_amd7930 *next = p->next;
1084
1085                 snd_card_free(p->card);
1086
1087                 p = next;
1088         }
1089
1090         amd7930_list = NULL;
1091
1092         of_unregister_driver(&amd7930_sbus_driver);
1093 }
1094
1095 module_init(amd7930_init);
1096 module_exit(amd7930_exit);