1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Driver for AMD7930 sound chips found on Sparcs. 4 * Copyright (C) 2002, 2008 David S. Miller <davem@davemloft.net> 5 * 6 * Based entirely upon drivers/sbus/audio/amd7930.c which is: 7 * Copyright (C) 1996,1997 Thomas K. Dyas (tdyas@eden.rutgers.edu) 8 * 9 * --- Notes from Thomas's original driver --- 10 * This is the lowlevel driver for the AMD7930 audio chip found on all 11 * sun4c machines and some sun4m machines. 12 * 13 * The amd7930 is actually an ISDN chip which has a very simple 14 * integrated audio encoder/decoder. When Sun decided on what chip to 15 * use for audio, they had the brilliant idea of using the amd7930 and 16 * only connecting the audio encoder/decoder pins. 17 * 18 * Thanks to the AMD engineer who was able to get us the AMD79C30 19 * databook which has all the programming information and gain tables. 20 * 21 * Advanced Micro Devices' Am79C30A is an ISDN/audio chip used in the 22 * SparcStation 1+. The chip provides microphone and speaker interfaces 23 * which provide mono-channel audio at 8K samples per second via either 24 * 8-bit A-law or 8-bit mu-law encoding. Also, the chip features an 25 * ISDN BRI Line Interface Unit (LIU), I.430 S/T physical interface, 26 * which performs basic D channel LAPD processing and provides raw 27 * B channel data. The digital audio channel, the two ISDN B channels, 28 * and two 64 Kbps channels to the microprocessor are all interconnected 29 * via a multiplexer. 30 * --- End of notes from Thoamas's original driver --- 31 */ 32 33 #include <linux/module.h> 34 #include <linux/kernel.h> 35 #include <linux/slab.h> 36 #include <linux/init.h> 37 #include <linux/interrupt.h> 38 #include <linux/moduleparam.h> 39 #include <linux/of.h> 40 #include <linux/of_device.h> 41 #include <linux/io.h> 42 43 #include <sound/core.h> 44 #include <sound/pcm.h> 45 #include <sound/info.h> 46 #include <sound/control.h> 47 #include <sound/initval.h> 48 49 #include <asm/irq.h> 50 #include <asm/prom.h> 51 52 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */ 53 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR; /* ID for this card */ 54 static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */ 55 56 module_param_array(index, int, NULL, 0444); 57 MODULE_PARM_DESC(index, "Index value for Sun AMD7930 soundcard."); 58 module_param_array(id, charp, NULL, 0444); 59 MODULE_PARM_DESC(id, "ID string for Sun AMD7930 soundcard."); 60 module_param_array(enable, bool, NULL, 0444); 61 MODULE_PARM_DESC(enable, "Enable Sun AMD7930 soundcard."); 62 MODULE_AUTHOR("Thomas K. Dyas and David S. Miller"); 63 MODULE_DESCRIPTION("Sun AMD7930"); 64 MODULE_LICENSE("GPL"); 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 platform_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 const 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 const struct snd_pcm_ops snd_amd7930_playback_ops = { 726 .open = snd_amd7930_playback_open, 727 .close = snd_amd7930_playback_close, 728 .prepare = snd_amd7930_playback_prepare, 729 .trigger = snd_amd7930_playback_trigger, 730 .pointer = snd_amd7930_playback_pointer, 731 }; 732 733 static const struct snd_pcm_ops snd_amd7930_capture_ops = { 734 .open = snd_amd7930_capture_open, 735 .close = snd_amd7930_capture_close, 736 .prepare = snd_amd7930_capture_prepare, 737 .trigger = snd_amd7930_capture_trigger, 738 .pointer = snd_amd7930_capture_pointer, 739 }; 740 741 static int snd_amd7930_pcm(struct snd_amd7930 *amd) 742 { 743 struct snd_pcm *pcm; 744 int err; 745 746 if ((err = snd_pcm_new(amd->card, 747 /* ID */ "sun_amd7930", 748 /* device */ 0, 749 /* playback count */ 1, 750 /* capture count */ 1, &pcm)) < 0) 751 return err; 752 753 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_amd7930_playback_ops); 754 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_amd7930_capture_ops); 755 756 pcm->private_data = amd; 757 pcm->info_flags = 0; 758 strcpy(pcm->name, amd->card->shortname); 759 amd->pcm = pcm; 760 761 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, 762 NULL, 64*1024, 64*1024); 763 764 return 0; 765 } 766 767 #define VOLUME_MONITOR 0 768 #define VOLUME_CAPTURE 1 769 #define VOLUME_PLAYBACK 2 770 771 static int snd_amd7930_info_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_info *uinfo) 772 { 773 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 774 uinfo->count = 1; 775 uinfo->value.integer.min = 0; 776 uinfo->value.integer.max = 255; 777 778 return 0; 779 } 780 781 static int snd_amd7930_get_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol) 782 { 783 struct snd_amd7930 *amd = snd_kcontrol_chip(kctl); 784 int type = kctl->private_value; 785 int *swval; 786 787 switch (type) { 788 case VOLUME_MONITOR: 789 swval = &amd->mgain; 790 break; 791 case VOLUME_CAPTURE: 792 swval = &amd->rgain; 793 break; 794 case VOLUME_PLAYBACK: 795 default: 796 swval = &amd->pgain; 797 break; 798 } 799 800 ucontrol->value.integer.value[0] = *swval; 801 802 return 0; 803 } 804 805 static int snd_amd7930_put_volume(struct snd_kcontrol *kctl, struct snd_ctl_elem_value *ucontrol) 806 { 807 struct snd_amd7930 *amd = snd_kcontrol_chip(kctl); 808 unsigned long flags; 809 int type = kctl->private_value; 810 int *swval, change; 811 812 switch (type) { 813 case VOLUME_MONITOR: 814 swval = &amd->mgain; 815 break; 816 case VOLUME_CAPTURE: 817 swval = &amd->rgain; 818 break; 819 case VOLUME_PLAYBACK: 820 default: 821 swval = &amd->pgain; 822 break; 823 } 824 825 spin_lock_irqsave(&amd->lock, flags); 826 827 if (*swval != ucontrol->value.integer.value[0]) { 828 *swval = ucontrol->value.integer.value[0] & 0xff; 829 __amd7930_update_map(amd); 830 change = 1; 831 } else 832 change = 0; 833 834 spin_unlock_irqrestore(&amd->lock, flags); 835 836 return change; 837 } 838 839 static const struct snd_kcontrol_new amd7930_controls[] = { 840 { 841 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 842 .name = "Monitor Volume", 843 .index = 0, 844 .info = snd_amd7930_info_volume, 845 .get = snd_amd7930_get_volume, 846 .put = snd_amd7930_put_volume, 847 .private_value = VOLUME_MONITOR, 848 }, 849 { 850 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 851 .name = "Capture Volume", 852 .index = 0, 853 .info = snd_amd7930_info_volume, 854 .get = snd_amd7930_get_volume, 855 .put = snd_amd7930_put_volume, 856 .private_value = VOLUME_CAPTURE, 857 }, 858 { 859 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 860 .name = "Playback 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_PLAYBACK, 866 }, 867 }; 868 869 static int snd_amd7930_mixer(struct snd_amd7930 *amd) 870 { 871 struct snd_card *card; 872 int idx, err; 873 874 if (snd_BUG_ON(!amd || !amd->card)) 875 return -EINVAL; 876 877 card = amd->card; 878 strcpy(card->mixername, card->shortname); 879 880 for (idx = 0; idx < ARRAY_SIZE(amd7930_controls); idx++) { 881 if ((err = snd_ctl_add(card, 882 snd_ctl_new1(&amd7930_controls[idx], amd))) < 0) 883 return err; 884 } 885 886 return 0; 887 } 888 889 static int snd_amd7930_free(struct snd_amd7930 *amd) 890 { 891 struct platform_device *op = amd->op; 892 893 amd7930_idle(amd); 894 895 if (amd->irq) 896 free_irq(amd->irq, amd); 897 898 if (amd->regs) 899 of_iounmap(&op->resource[0], amd->regs, 900 resource_size(&op->resource[0])); 901 902 kfree(amd); 903 904 return 0; 905 } 906 907 static int snd_amd7930_dev_free(struct snd_device *device) 908 { 909 struct snd_amd7930 *amd = device->device_data; 910 911 return snd_amd7930_free(amd); 912 } 913 914 static const struct snd_device_ops snd_amd7930_dev_ops = { 915 .dev_free = snd_amd7930_dev_free, 916 }; 917 918 static int snd_amd7930_create(struct snd_card *card, 919 struct platform_device *op, 920 int irq, int dev, 921 struct snd_amd7930 **ramd) 922 { 923 struct snd_amd7930 *amd; 924 unsigned long flags; 925 int err; 926 927 *ramd = NULL; 928 amd = kzalloc(sizeof(*amd), GFP_KERNEL); 929 if (amd == NULL) 930 return -ENOMEM; 931 932 spin_lock_init(&amd->lock); 933 amd->card = card; 934 amd->op = op; 935 936 amd->regs = of_ioremap(&op->resource[0], 0, 937 resource_size(&op->resource[0]), "amd7930"); 938 if (!amd->regs) { 939 snd_printk(KERN_ERR 940 "amd7930-%d: Unable to map chip registers.\n", dev); 941 kfree(amd); 942 return -EIO; 943 } 944 945 amd7930_idle(amd); 946 947 if (request_irq(irq, snd_amd7930_interrupt, 948 IRQF_SHARED, "amd7930", amd)) { 949 snd_printk(KERN_ERR "amd7930-%d: Unable to grab IRQ %d\n", 950 dev, irq); 951 snd_amd7930_free(amd); 952 return -EBUSY; 953 } 954 amd->irq = irq; 955 956 amd7930_enable_ints(amd); 957 958 spin_lock_irqsave(&amd->lock, flags); 959 960 amd->rgain = 128; 961 amd->pgain = 200; 962 amd->mgain = 0; 963 964 memset(&amd->map, 0, sizeof(amd->map)); 965 amd->map.mmr1 = (AM_MAP_MMR1_GX | AM_MAP_MMR1_GER | 966 AM_MAP_MMR1_GR | AM_MAP_MMR1_STG); 967 amd->map.mmr2 = (AM_MAP_MMR2_LS | AM_MAP_MMR2_AINB); 968 969 __amd7930_update_map(amd); 970 971 /* Always MUX audio (Ba) to channel Bb. */ 972 sbus_writeb(AMR_MUX_MCR1, amd->regs + AMD7930_CR); 973 sbus_writeb(AM_MUX_CHANNEL_Ba | (AM_MUX_CHANNEL_Bb << 4), 974 amd->regs + AMD7930_DR); 975 976 spin_unlock_irqrestore(&amd->lock, flags); 977 978 if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, 979 amd, &snd_amd7930_dev_ops)) < 0) { 980 snd_amd7930_free(amd); 981 return err; 982 } 983 984 *ramd = amd; 985 return 0; 986 } 987 988 static int amd7930_sbus_probe(struct platform_device *op) 989 { 990 struct resource *rp = &op->resource[0]; 991 static int dev_num; 992 struct snd_card *card; 993 struct snd_amd7930 *amd; 994 int err, irq; 995 996 irq = op->archdata.irqs[0]; 997 998 if (dev_num >= SNDRV_CARDS) 999 return -ENODEV; 1000 if (!enable[dev_num]) { 1001 dev_num++; 1002 return -ENOENT; 1003 } 1004 1005 err = snd_card_new(&op->dev, index[dev_num], id[dev_num], 1006 THIS_MODULE, 0, &card); 1007 if (err < 0) 1008 return err; 1009 1010 strcpy(card->driver, "AMD7930"); 1011 strcpy(card->shortname, "Sun AMD7930"); 1012 sprintf(card->longname, "%s at 0x%02lx:0x%08Lx, irq %d", 1013 card->shortname, 1014 rp->flags & 0xffL, 1015 (unsigned long long)rp->start, 1016 irq); 1017 1018 if ((err = snd_amd7930_create(card, op, 1019 irq, dev_num, &amd)) < 0) 1020 goto out_err; 1021 1022 if ((err = snd_amd7930_pcm(amd)) < 0) 1023 goto out_err; 1024 1025 if ((err = snd_amd7930_mixer(amd)) < 0) 1026 goto out_err; 1027 1028 if ((err = snd_card_register(card)) < 0) 1029 goto out_err; 1030 1031 amd->next = amd7930_list; 1032 amd7930_list = amd; 1033 1034 dev_num++; 1035 1036 return 0; 1037 1038 out_err: 1039 snd_card_free(card); 1040 return err; 1041 } 1042 1043 static const struct of_device_id amd7930_match[] = { 1044 { 1045 .name = "audio", 1046 }, 1047 {}, 1048 }; 1049 MODULE_DEVICE_TABLE(of, amd7930_match); 1050 1051 static struct platform_driver amd7930_sbus_driver = { 1052 .driver = { 1053 .name = "audio", 1054 .of_match_table = amd7930_match, 1055 }, 1056 .probe = amd7930_sbus_probe, 1057 }; 1058 1059 static int __init amd7930_init(void) 1060 { 1061 return platform_driver_register(&amd7930_sbus_driver); 1062 } 1063 1064 static void __exit amd7930_exit(void) 1065 { 1066 struct snd_amd7930 *p = amd7930_list; 1067 1068 while (p != NULL) { 1069 struct snd_amd7930 *next = p->next; 1070 1071 snd_card_free(p->card); 1072 1073 p = next; 1074 } 1075 1076 amd7930_list = NULL; 1077 1078 platform_driver_unregister(&amd7930_sbus_driver); 1079 } 1080 1081 module_init(amd7930_init); 1082 module_exit(amd7930_exit); 1083