1 /* 2 * Driver for A2 audio system used in SGI machines 3 * Copyright (c) 2008 Thomas Bogendoerfer <tsbogend@alpha.fanken.de> 4 * 5 * Based on OSS code from Ladislav Michl <ladis@linux-mips.org>, which 6 * was based on code from Ulf Carlsson 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 * 21 */ 22 #include <linux/kernel.h> 23 #include <linux/init.h> 24 #include <linux/interrupt.h> 25 #include <linux/dma-mapping.h> 26 #include <linux/platform_device.h> 27 #include <linux/io.h> 28 #include <linux/slab.h> 29 #include <linux/module.h> 30 31 #include <asm/sgi/hpc3.h> 32 #include <asm/sgi/ip22.h> 33 34 #include <sound/core.h> 35 #include <sound/control.h> 36 #include <sound/pcm.h> 37 #include <sound/pcm-indirect.h> 38 #include <sound/initval.h> 39 40 #include "hal2.h" 41 42 static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */ 43 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ 44 45 module_param(index, int, 0444); 46 MODULE_PARM_DESC(index, "Index value for SGI HAL2 soundcard."); 47 module_param(id, charp, 0444); 48 MODULE_PARM_DESC(id, "ID string for SGI HAL2 soundcard."); 49 MODULE_DESCRIPTION("ALSA driver for SGI HAL2 audio"); 50 MODULE_AUTHOR("Thomas Bogendoerfer"); 51 MODULE_LICENSE("GPL"); 52 53 54 #define H2_BLOCK_SIZE 1024 55 #define H2_BUF_SIZE 16384 56 57 struct hal2_pbus { 58 struct hpc3_pbus_dmacregs *pbus; 59 int pbusnr; 60 unsigned int ctrl; /* Current state of pbus->pbdma_ctrl */ 61 }; 62 63 struct hal2_desc { 64 struct hpc_dma_desc desc; 65 u32 pad; /* padding */ 66 }; 67 68 struct hal2_codec { 69 struct snd_pcm_indirect pcm_indirect; 70 struct snd_pcm_substream *substream; 71 72 unsigned char *buffer; 73 dma_addr_t buffer_dma; 74 struct hal2_desc *desc; 75 dma_addr_t desc_dma; 76 int desc_count; 77 struct hal2_pbus pbus; 78 int voices; /* mono/stereo */ 79 unsigned int sample_rate; 80 unsigned int master; /* Master frequency */ 81 unsigned short mod; /* MOD value */ 82 unsigned short inc; /* INC value */ 83 }; 84 85 #define H2_MIX_OUTPUT_ATT 0 86 #define H2_MIX_INPUT_GAIN 1 87 88 struct snd_hal2 { 89 struct snd_card *card; 90 91 struct hal2_ctl_regs *ctl_regs; /* HAL2 ctl registers */ 92 struct hal2_aes_regs *aes_regs; /* HAL2 aes registers */ 93 struct hal2_vol_regs *vol_regs; /* HAL2 vol registers */ 94 struct hal2_syn_regs *syn_regs; /* HAL2 syn registers */ 95 96 struct hal2_codec dac; 97 struct hal2_codec adc; 98 }; 99 100 #define H2_INDIRECT_WAIT(regs) while (hal2_read(®s->isr) & H2_ISR_TSTATUS); 101 102 #define H2_READ_ADDR(addr) (addr | (1<<7)) 103 #define H2_WRITE_ADDR(addr) (addr) 104 105 static inline u32 hal2_read(u32 *reg) 106 { 107 return __raw_readl(reg); 108 } 109 110 static inline void hal2_write(u32 val, u32 *reg) 111 { 112 __raw_writel(val, reg); 113 } 114 115 116 static u32 hal2_i_read32(struct snd_hal2 *hal2, u16 addr) 117 { 118 u32 ret; 119 struct hal2_ctl_regs *regs = hal2->ctl_regs; 120 121 hal2_write(H2_READ_ADDR(addr), ®s->iar); 122 H2_INDIRECT_WAIT(regs); 123 ret = hal2_read(®s->idr0) & 0xffff; 124 hal2_write(H2_READ_ADDR(addr) | 0x1, ®s->iar); 125 H2_INDIRECT_WAIT(regs); 126 ret |= (hal2_read(®s->idr0) & 0xffff) << 16; 127 return ret; 128 } 129 130 static void hal2_i_write16(struct snd_hal2 *hal2, u16 addr, u16 val) 131 { 132 struct hal2_ctl_regs *regs = hal2->ctl_regs; 133 134 hal2_write(val, ®s->idr0); 135 hal2_write(0, ®s->idr1); 136 hal2_write(0, ®s->idr2); 137 hal2_write(0, ®s->idr3); 138 hal2_write(H2_WRITE_ADDR(addr), ®s->iar); 139 H2_INDIRECT_WAIT(regs); 140 } 141 142 static void hal2_i_write32(struct snd_hal2 *hal2, u16 addr, u32 val) 143 { 144 struct hal2_ctl_regs *regs = hal2->ctl_regs; 145 146 hal2_write(val & 0xffff, ®s->idr0); 147 hal2_write(val >> 16, ®s->idr1); 148 hal2_write(0, ®s->idr2); 149 hal2_write(0, ®s->idr3); 150 hal2_write(H2_WRITE_ADDR(addr), ®s->iar); 151 H2_INDIRECT_WAIT(regs); 152 } 153 154 static void hal2_i_setbit16(struct snd_hal2 *hal2, u16 addr, u16 bit) 155 { 156 struct hal2_ctl_regs *regs = hal2->ctl_regs; 157 158 hal2_write(H2_READ_ADDR(addr), ®s->iar); 159 H2_INDIRECT_WAIT(regs); 160 hal2_write((hal2_read(®s->idr0) & 0xffff) | bit, ®s->idr0); 161 hal2_write(0, ®s->idr1); 162 hal2_write(0, ®s->idr2); 163 hal2_write(0, ®s->idr3); 164 hal2_write(H2_WRITE_ADDR(addr), ®s->iar); 165 H2_INDIRECT_WAIT(regs); 166 } 167 168 static void hal2_i_clearbit16(struct snd_hal2 *hal2, u16 addr, u16 bit) 169 { 170 struct hal2_ctl_regs *regs = hal2->ctl_regs; 171 172 hal2_write(H2_READ_ADDR(addr), ®s->iar); 173 H2_INDIRECT_WAIT(regs); 174 hal2_write((hal2_read(®s->idr0) & 0xffff) & ~bit, ®s->idr0); 175 hal2_write(0, ®s->idr1); 176 hal2_write(0, ®s->idr2); 177 hal2_write(0, ®s->idr3); 178 hal2_write(H2_WRITE_ADDR(addr), ®s->iar); 179 H2_INDIRECT_WAIT(regs); 180 } 181 182 static int hal2_gain_info(struct snd_kcontrol *kcontrol, 183 struct snd_ctl_elem_info *uinfo) 184 { 185 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 186 uinfo->count = 2; 187 uinfo->value.integer.min = 0; 188 switch ((int)kcontrol->private_value) { 189 case H2_MIX_OUTPUT_ATT: 190 uinfo->value.integer.max = 31; 191 break; 192 case H2_MIX_INPUT_GAIN: 193 uinfo->value.integer.max = 15; 194 break; 195 } 196 return 0; 197 } 198 199 static int hal2_gain_get(struct snd_kcontrol *kcontrol, 200 struct snd_ctl_elem_value *ucontrol) 201 { 202 struct snd_hal2 *hal2 = snd_kcontrol_chip(kcontrol); 203 u32 tmp; 204 int l, r; 205 206 switch ((int)kcontrol->private_value) { 207 case H2_MIX_OUTPUT_ATT: 208 tmp = hal2_i_read32(hal2, H2I_DAC_C2); 209 if (tmp & H2I_C2_MUTE) { 210 l = 0; 211 r = 0; 212 } else { 213 l = 31 - ((tmp >> H2I_C2_L_ATT_SHIFT) & 31); 214 r = 31 - ((tmp >> H2I_C2_R_ATT_SHIFT) & 31); 215 } 216 break; 217 case H2_MIX_INPUT_GAIN: 218 tmp = hal2_i_read32(hal2, H2I_ADC_C2); 219 l = (tmp >> H2I_C2_L_GAIN_SHIFT) & 15; 220 r = (tmp >> H2I_C2_R_GAIN_SHIFT) & 15; 221 break; 222 } 223 ucontrol->value.integer.value[0] = l; 224 ucontrol->value.integer.value[1] = r; 225 226 return 0; 227 } 228 229 static int hal2_gain_put(struct snd_kcontrol *kcontrol, 230 struct snd_ctl_elem_value *ucontrol) 231 { 232 struct snd_hal2 *hal2 = snd_kcontrol_chip(kcontrol); 233 u32 old, new; 234 int l, r; 235 236 l = ucontrol->value.integer.value[0]; 237 r = ucontrol->value.integer.value[1]; 238 239 switch ((int)kcontrol->private_value) { 240 case H2_MIX_OUTPUT_ATT: 241 old = hal2_i_read32(hal2, H2I_DAC_C2); 242 new = old & ~(H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE); 243 if (l | r) { 244 l = 31 - l; 245 r = 31 - r; 246 new |= (l << H2I_C2_L_ATT_SHIFT); 247 new |= (r << H2I_C2_R_ATT_SHIFT); 248 } else 249 new |= H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE; 250 hal2_i_write32(hal2, H2I_DAC_C2, new); 251 break; 252 case H2_MIX_INPUT_GAIN: 253 old = hal2_i_read32(hal2, H2I_ADC_C2); 254 new = old & ~(H2I_C2_L_GAIN_M | H2I_C2_R_GAIN_M); 255 new |= (l << H2I_C2_L_GAIN_SHIFT); 256 new |= (r << H2I_C2_R_GAIN_SHIFT); 257 hal2_i_write32(hal2, H2I_ADC_C2, new); 258 break; 259 } 260 return old != new; 261 } 262 263 static struct snd_kcontrol_new hal2_ctrl_headphone = { 264 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 265 .name = "Headphone Playback Volume", 266 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, 267 .private_value = H2_MIX_OUTPUT_ATT, 268 .info = hal2_gain_info, 269 .get = hal2_gain_get, 270 .put = hal2_gain_put, 271 }; 272 273 static struct snd_kcontrol_new hal2_ctrl_mic = { 274 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 275 .name = "Mic Capture Volume", 276 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE, 277 .private_value = H2_MIX_INPUT_GAIN, 278 .info = hal2_gain_info, 279 .get = hal2_gain_get, 280 .put = hal2_gain_put, 281 }; 282 283 static int hal2_mixer_create(struct snd_hal2 *hal2) 284 { 285 int err; 286 287 /* mute DAC */ 288 hal2_i_write32(hal2, H2I_DAC_C2, 289 H2I_C2_L_ATT_M | H2I_C2_R_ATT_M | H2I_C2_MUTE); 290 /* mute ADC */ 291 hal2_i_write32(hal2, H2I_ADC_C2, 0); 292 293 err = snd_ctl_add(hal2->card, 294 snd_ctl_new1(&hal2_ctrl_headphone, hal2)); 295 if (err < 0) 296 return err; 297 298 err = snd_ctl_add(hal2->card, 299 snd_ctl_new1(&hal2_ctrl_mic, hal2)); 300 if (err < 0) 301 return err; 302 303 return 0; 304 } 305 306 static irqreturn_t hal2_interrupt(int irq, void *dev_id) 307 { 308 struct snd_hal2 *hal2 = dev_id; 309 irqreturn_t ret = IRQ_NONE; 310 311 /* decide what caused this interrupt */ 312 if (hal2->dac.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) { 313 snd_pcm_period_elapsed(hal2->dac.substream); 314 ret = IRQ_HANDLED; 315 } 316 if (hal2->adc.pbus.pbus->pbdma_ctrl & HPC3_PDMACTRL_INT) { 317 snd_pcm_period_elapsed(hal2->adc.substream); 318 ret = IRQ_HANDLED; 319 } 320 return ret; 321 } 322 323 static int hal2_compute_rate(struct hal2_codec *codec, unsigned int rate) 324 { 325 unsigned short mod; 326 327 if (44100 % rate < 48000 % rate) { 328 mod = 4 * 44100 / rate; 329 codec->master = 44100; 330 } else { 331 mod = 4 * 48000 / rate; 332 codec->master = 48000; 333 } 334 335 codec->inc = 4; 336 codec->mod = mod; 337 rate = 4 * codec->master / mod; 338 339 return rate; 340 } 341 342 static void hal2_set_dac_rate(struct snd_hal2 *hal2) 343 { 344 unsigned int master = hal2->dac.master; 345 int inc = hal2->dac.inc; 346 int mod = hal2->dac.mod; 347 348 hal2_i_write16(hal2, H2I_BRES1_C1, (master == 44100) ? 1 : 0); 349 hal2_i_write32(hal2, H2I_BRES1_C2, 350 ((0xffff & (inc - mod - 1)) << 16) | inc); 351 } 352 353 static void hal2_set_adc_rate(struct snd_hal2 *hal2) 354 { 355 unsigned int master = hal2->adc.master; 356 int inc = hal2->adc.inc; 357 int mod = hal2->adc.mod; 358 359 hal2_i_write16(hal2, H2I_BRES2_C1, (master == 44100) ? 1 : 0); 360 hal2_i_write32(hal2, H2I_BRES2_C2, 361 ((0xffff & (inc - mod - 1)) << 16) | inc); 362 } 363 364 static void hal2_setup_dac(struct snd_hal2 *hal2) 365 { 366 unsigned int fifobeg, fifoend, highwater, sample_size; 367 struct hal2_pbus *pbus = &hal2->dac.pbus; 368 369 /* Now we set up some PBUS information. The PBUS needs information about 370 * what portion of the fifo it will use. If it's receiving or 371 * transmitting, and finally whether the stream is little endian or big 372 * endian. The information is written later, on the start call. 373 */ 374 sample_size = 2 * hal2->dac.voices; 375 /* Fifo should be set to hold exactly four samples. Highwater mark 376 * should be set to two samples. */ 377 highwater = (sample_size * 2) >> 1; /* halfwords */ 378 fifobeg = 0; /* playback is first */ 379 fifoend = (sample_size * 4) >> 3; /* doublewords */ 380 pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_LD | 381 (highwater << 8) | (fifobeg << 16) | (fifoend << 24); 382 /* We disable everything before we do anything at all */ 383 pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD; 384 hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX); 385 /* Setup the HAL2 for playback */ 386 hal2_set_dac_rate(hal2); 387 /* Set endianess */ 388 hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECTX); 389 /* Set DMA bus */ 390 hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr)); 391 /* We are using 1st Bresenham clock generator for playback */ 392 hal2_i_write16(hal2, H2I_DAC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT) 393 | (1 << H2I_C1_CLKID_SHIFT) 394 | (hal2->dac.voices << H2I_C1_DATAT_SHIFT)); 395 } 396 397 static void hal2_setup_adc(struct snd_hal2 *hal2) 398 { 399 unsigned int fifobeg, fifoend, highwater, sample_size; 400 struct hal2_pbus *pbus = &hal2->adc.pbus; 401 402 sample_size = 2 * hal2->adc.voices; 403 highwater = (sample_size * 2) >> 1; /* halfwords */ 404 fifobeg = (4 * 4) >> 3; /* record is second */ 405 fifoend = (4 * 4 + sample_size * 4) >> 3; /* doublewords */ 406 pbus->ctrl = HPC3_PDMACTRL_RT | HPC3_PDMACTRL_RCV | HPC3_PDMACTRL_LD | 407 (highwater << 8) | (fifobeg << 16) | (fifoend << 24); 408 pbus->pbus->pbdma_ctrl = HPC3_PDMACTRL_LD; 409 hal2_i_clearbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR); 410 /* Setup the HAL2 for record */ 411 hal2_set_adc_rate(hal2); 412 /* Set endianess */ 413 hal2_i_clearbit16(hal2, H2I_DMA_END, H2I_DMA_END_CODECR); 414 /* Set DMA bus */ 415 hal2_i_setbit16(hal2, H2I_DMA_DRV, (1 << pbus->pbusnr)); 416 /* We are using 2nd Bresenham clock generator for record */ 417 hal2_i_write16(hal2, H2I_ADC_C1, (pbus->pbusnr << H2I_C1_DMA_SHIFT) 418 | (2 << H2I_C1_CLKID_SHIFT) 419 | (hal2->adc.voices << H2I_C1_DATAT_SHIFT)); 420 } 421 422 static void hal2_start_dac(struct snd_hal2 *hal2) 423 { 424 struct hal2_pbus *pbus = &hal2->dac.pbus; 425 426 pbus->pbus->pbdma_dptr = hal2->dac.desc_dma; 427 pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT; 428 /* enable DAC */ 429 hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECTX); 430 } 431 432 static void hal2_start_adc(struct snd_hal2 *hal2) 433 { 434 struct hal2_pbus *pbus = &hal2->adc.pbus; 435 436 pbus->pbus->pbdma_dptr = hal2->adc.desc_dma; 437 pbus->pbus->pbdma_ctrl = pbus->ctrl | HPC3_PDMACTRL_ACT; 438 /* enable ADC */ 439 hal2_i_setbit16(hal2, H2I_DMA_PORT_EN, H2I_DMA_PORT_EN_CODECR); 440 } 441 442 static inline void hal2_stop_dac(struct snd_hal2 *hal2) 443 { 444 hal2->dac.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD; 445 /* The HAL2 itself may remain enabled safely */ 446 } 447 448 static inline void hal2_stop_adc(struct snd_hal2 *hal2) 449 { 450 hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD; 451 } 452 453 static int hal2_alloc_dmabuf(struct hal2_codec *codec) 454 { 455 struct hal2_desc *desc; 456 dma_addr_t desc_dma, buffer_dma; 457 int count = H2_BUF_SIZE / H2_BLOCK_SIZE; 458 int i; 459 460 codec->buffer = dma_alloc_noncoherent(NULL, H2_BUF_SIZE, 461 &buffer_dma, GFP_KERNEL); 462 if (!codec->buffer) 463 return -ENOMEM; 464 desc = dma_alloc_noncoherent(NULL, count * sizeof(struct hal2_desc), 465 &desc_dma, GFP_KERNEL); 466 if (!desc) { 467 dma_free_noncoherent(NULL, H2_BUF_SIZE, 468 codec->buffer, buffer_dma); 469 return -ENOMEM; 470 } 471 codec->buffer_dma = buffer_dma; 472 codec->desc_dma = desc_dma; 473 codec->desc = desc; 474 for (i = 0; i < count; i++) { 475 desc->desc.pbuf = buffer_dma + i * H2_BLOCK_SIZE; 476 desc->desc.cntinfo = HPCDMA_XIE | H2_BLOCK_SIZE; 477 desc->desc.pnext = (i == count - 1) ? 478 desc_dma : desc_dma + (i + 1) * sizeof(struct hal2_desc); 479 desc++; 480 } 481 dma_cache_sync(NULL, codec->desc, count * sizeof(struct hal2_desc), 482 DMA_TO_DEVICE); 483 codec->desc_count = count; 484 return 0; 485 } 486 487 static void hal2_free_dmabuf(struct hal2_codec *codec) 488 { 489 dma_free_noncoherent(NULL, codec->desc_count * sizeof(struct hal2_desc), 490 codec->desc, codec->desc_dma); 491 dma_free_noncoherent(NULL, H2_BUF_SIZE, codec->buffer, 492 codec->buffer_dma); 493 } 494 495 static struct snd_pcm_hardware hal2_pcm_hw = { 496 .info = (SNDRV_PCM_INFO_MMAP | 497 SNDRV_PCM_INFO_MMAP_VALID | 498 SNDRV_PCM_INFO_INTERLEAVED | 499 SNDRV_PCM_INFO_BLOCK_TRANSFER), 500 .formats = SNDRV_PCM_FMTBIT_S16_BE, 501 .rates = SNDRV_PCM_RATE_8000_48000, 502 .rate_min = 8000, 503 .rate_max = 48000, 504 .channels_min = 2, 505 .channels_max = 2, 506 .buffer_bytes_max = 65536, 507 .period_bytes_min = 1024, 508 .period_bytes_max = 65536, 509 .periods_min = 2, 510 .periods_max = 1024, 511 }; 512 513 static int hal2_pcm_hw_params(struct snd_pcm_substream *substream, 514 struct snd_pcm_hw_params *params) 515 { 516 int err; 517 518 err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(params)); 519 if (err < 0) 520 return err; 521 522 return 0; 523 } 524 525 static int hal2_pcm_hw_free(struct snd_pcm_substream *substream) 526 { 527 return snd_pcm_lib_free_pages(substream); 528 } 529 530 static int hal2_playback_open(struct snd_pcm_substream *substream) 531 { 532 struct snd_pcm_runtime *runtime = substream->runtime; 533 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 534 int err; 535 536 runtime->hw = hal2_pcm_hw; 537 538 err = hal2_alloc_dmabuf(&hal2->dac); 539 if (err) 540 return err; 541 return 0; 542 } 543 544 static int hal2_playback_close(struct snd_pcm_substream *substream) 545 { 546 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 547 548 hal2_free_dmabuf(&hal2->dac); 549 return 0; 550 } 551 552 static int hal2_playback_prepare(struct snd_pcm_substream *substream) 553 { 554 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 555 struct snd_pcm_runtime *runtime = substream->runtime; 556 struct hal2_codec *dac = &hal2->dac; 557 558 dac->voices = runtime->channels; 559 dac->sample_rate = hal2_compute_rate(dac, runtime->rate); 560 memset(&dac->pcm_indirect, 0, sizeof(dac->pcm_indirect)); 561 dac->pcm_indirect.hw_buffer_size = H2_BUF_SIZE; 562 dac->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream); 563 dac->substream = substream; 564 hal2_setup_dac(hal2); 565 return 0; 566 } 567 568 static int hal2_playback_trigger(struct snd_pcm_substream *substream, int cmd) 569 { 570 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 571 572 switch (cmd) { 573 case SNDRV_PCM_TRIGGER_START: 574 hal2->dac.pcm_indirect.hw_io = hal2->dac.buffer_dma; 575 hal2->dac.pcm_indirect.hw_data = 0; 576 substream->ops->ack(substream); 577 hal2_start_dac(hal2); 578 break; 579 case SNDRV_PCM_TRIGGER_STOP: 580 hal2_stop_dac(hal2); 581 break; 582 default: 583 return -EINVAL; 584 } 585 return 0; 586 } 587 588 static snd_pcm_uframes_t 589 hal2_playback_pointer(struct snd_pcm_substream *substream) 590 { 591 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 592 struct hal2_codec *dac = &hal2->dac; 593 594 return snd_pcm_indirect_playback_pointer(substream, &dac->pcm_indirect, 595 dac->pbus.pbus->pbdma_bptr); 596 } 597 598 static void hal2_playback_transfer(struct snd_pcm_substream *substream, 599 struct snd_pcm_indirect *rec, size_t bytes) 600 { 601 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 602 unsigned char *buf = hal2->dac.buffer + rec->hw_data; 603 604 memcpy(buf, substream->runtime->dma_area + rec->sw_data, bytes); 605 dma_cache_sync(NULL, buf, bytes, DMA_TO_DEVICE); 606 607 } 608 609 static int hal2_playback_ack(struct snd_pcm_substream *substream) 610 { 611 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 612 struct hal2_codec *dac = &hal2->dac; 613 614 dac->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2; 615 snd_pcm_indirect_playback_transfer(substream, 616 &dac->pcm_indirect, 617 hal2_playback_transfer); 618 return 0; 619 } 620 621 static int hal2_capture_open(struct snd_pcm_substream *substream) 622 { 623 struct snd_pcm_runtime *runtime = substream->runtime; 624 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 625 struct hal2_codec *adc = &hal2->adc; 626 int err; 627 628 runtime->hw = hal2_pcm_hw; 629 630 err = hal2_alloc_dmabuf(adc); 631 if (err) 632 return err; 633 return 0; 634 } 635 636 static int hal2_capture_close(struct snd_pcm_substream *substream) 637 { 638 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 639 640 hal2_free_dmabuf(&hal2->adc); 641 return 0; 642 } 643 644 static int hal2_capture_prepare(struct snd_pcm_substream *substream) 645 { 646 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 647 struct snd_pcm_runtime *runtime = substream->runtime; 648 struct hal2_codec *adc = &hal2->adc; 649 650 adc->voices = runtime->channels; 651 adc->sample_rate = hal2_compute_rate(adc, runtime->rate); 652 memset(&adc->pcm_indirect, 0, sizeof(adc->pcm_indirect)); 653 adc->pcm_indirect.hw_buffer_size = H2_BUF_SIZE; 654 adc->pcm_indirect.hw_queue_size = H2_BUF_SIZE / 2; 655 adc->pcm_indirect.sw_buffer_size = snd_pcm_lib_buffer_bytes(substream); 656 adc->substream = substream; 657 hal2_setup_adc(hal2); 658 return 0; 659 } 660 661 static int hal2_capture_trigger(struct snd_pcm_substream *substream, int cmd) 662 { 663 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 664 665 switch (cmd) { 666 case SNDRV_PCM_TRIGGER_START: 667 hal2->adc.pcm_indirect.hw_io = hal2->adc.buffer_dma; 668 hal2->adc.pcm_indirect.hw_data = 0; 669 printk(KERN_DEBUG "buffer_dma %x\n", hal2->adc.buffer_dma); 670 hal2_start_adc(hal2); 671 break; 672 case SNDRV_PCM_TRIGGER_STOP: 673 hal2_stop_adc(hal2); 674 break; 675 default: 676 return -EINVAL; 677 } 678 return 0; 679 } 680 681 static snd_pcm_uframes_t 682 hal2_capture_pointer(struct snd_pcm_substream *substream) 683 { 684 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 685 struct hal2_codec *adc = &hal2->adc; 686 687 return snd_pcm_indirect_capture_pointer(substream, &adc->pcm_indirect, 688 adc->pbus.pbus->pbdma_bptr); 689 } 690 691 static void hal2_capture_transfer(struct snd_pcm_substream *substream, 692 struct snd_pcm_indirect *rec, size_t bytes) 693 { 694 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 695 unsigned char *buf = hal2->adc.buffer + rec->hw_data; 696 697 dma_cache_sync(NULL, buf, bytes, DMA_FROM_DEVICE); 698 memcpy(substream->runtime->dma_area + rec->sw_data, buf, bytes); 699 } 700 701 static int hal2_capture_ack(struct snd_pcm_substream *substream) 702 { 703 struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream); 704 struct hal2_codec *adc = &hal2->adc; 705 706 snd_pcm_indirect_capture_transfer(substream, 707 &adc->pcm_indirect, 708 hal2_capture_transfer); 709 return 0; 710 } 711 712 static struct snd_pcm_ops hal2_playback_ops = { 713 .open = hal2_playback_open, 714 .close = hal2_playback_close, 715 .ioctl = snd_pcm_lib_ioctl, 716 .hw_params = hal2_pcm_hw_params, 717 .hw_free = hal2_pcm_hw_free, 718 .prepare = hal2_playback_prepare, 719 .trigger = hal2_playback_trigger, 720 .pointer = hal2_playback_pointer, 721 .ack = hal2_playback_ack, 722 }; 723 724 static struct snd_pcm_ops hal2_capture_ops = { 725 .open = hal2_capture_open, 726 .close = hal2_capture_close, 727 .ioctl = snd_pcm_lib_ioctl, 728 .hw_params = hal2_pcm_hw_params, 729 .hw_free = hal2_pcm_hw_free, 730 .prepare = hal2_capture_prepare, 731 .trigger = hal2_capture_trigger, 732 .pointer = hal2_capture_pointer, 733 .ack = hal2_capture_ack, 734 }; 735 736 static int hal2_pcm_create(struct snd_hal2 *hal2) 737 { 738 struct snd_pcm *pcm; 739 int err; 740 741 /* create first pcm device with one outputs and one input */ 742 err = snd_pcm_new(hal2->card, "SGI HAL2 Audio", 0, 1, 1, &pcm); 743 if (err < 0) 744 return err; 745 746 pcm->private_data = hal2; 747 strcpy(pcm->name, "SGI HAL2"); 748 749 /* set operators */ 750 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, 751 &hal2_playback_ops); 752 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 753 &hal2_capture_ops); 754 snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_CONTINUOUS, 755 snd_dma_continuous_data(GFP_KERNEL), 756 0, 1024 * 1024); 757 758 return 0; 759 } 760 761 static int hal2_dev_free(struct snd_device *device) 762 { 763 struct snd_hal2 *hal2 = device->device_data; 764 765 free_irq(SGI_HPCDMA_IRQ, hal2); 766 kfree(hal2); 767 return 0; 768 } 769 770 static struct snd_device_ops hal2_ops = { 771 .dev_free = hal2_dev_free, 772 }; 773 774 static void hal2_init_codec(struct hal2_codec *codec, struct hpc3_regs *hpc3, 775 int index) 776 { 777 codec->pbus.pbusnr = index; 778 codec->pbus.pbus = &hpc3->pbdma[index]; 779 } 780 781 static int hal2_detect(struct snd_hal2 *hal2) 782 { 783 unsigned short board, major, minor; 784 unsigned short rev; 785 786 /* reset HAL2 */ 787 hal2_write(0, &hal2->ctl_regs->isr); 788 789 /* release reset */ 790 hal2_write(H2_ISR_GLOBAL_RESET_N | H2_ISR_CODEC_RESET_N, 791 &hal2->ctl_regs->isr); 792 793 794 hal2_i_write16(hal2, H2I_RELAY_C, H2I_RELAY_C_STATE); 795 rev = hal2_read(&hal2->ctl_regs->rev); 796 if (rev & H2_REV_AUDIO_PRESENT) 797 return -ENODEV; 798 799 board = (rev & H2_REV_BOARD_M) >> 12; 800 major = (rev & H2_REV_MAJOR_CHIP_M) >> 4; 801 minor = (rev & H2_REV_MINOR_CHIP_M); 802 803 printk(KERN_INFO "SGI HAL2 revision %i.%i.%i\n", 804 board, major, minor); 805 806 return 0; 807 } 808 809 static int hal2_create(struct snd_card *card, struct snd_hal2 **rchip) 810 { 811 struct snd_hal2 *hal2; 812 struct hpc3_regs *hpc3 = hpc3c0; 813 int err; 814 815 hal2 = kzalloc(sizeof(struct snd_hal2), GFP_KERNEL); 816 if (!hal2) 817 return -ENOMEM; 818 819 hal2->card = card; 820 821 if (request_irq(SGI_HPCDMA_IRQ, hal2_interrupt, IRQF_SHARED, 822 "SGI HAL2", hal2)) { 823 printk(KERN_ERR "HAL2: Can't get irq %d\n", SGI_HPCDMA_IRQ); 824 kfree(hal2); 825 return -EAGAIN; 826 } 827 828 hal2->ctl_regs = (struct hal2_ctl_regs *)hpc3->pbus_extregs[0]; 829 hal2->aes_regs = (struct hal2_aes_regs *)hpc3->pbus_extregs[1]; 830 hal2->vol_regs = (struct hal2_vol_regs *)hpc3->pbus_extregs[2]; 831 hal2->syn_regs = (struct hal2_syn_regs *)hpc3->pbus_extregs[3]; 832 833 if (hal2_detect(hal2) < 0) { 834 kfree(hal2); 835 return -ENODEV; 836 } 837 838 hal2_init_codec(&hal2->dac, hpc3, 0); 839 hal2_init_codec(&hal2->adc, hpc3, 1); 840 841 /* 842 * All DMA channel interfaces in HAL2 are designed to operate with 843 * PBUS programmed for 2 cycles in D3, 2 cycles in D4 and 2 cycles 844 * in D5. HAL2 is a 16-bit device which can accept both big and little 845 * endian format. It assumes that even address bytes are on high 846 * portion of PBUS (15:8) and assumes that HPC3 is programmed to 847 * accept a live (unsynchronized) version of P_DREQ_N from HAL2. 848 */ 849 #define HAL2_PBUS_DMACFG ((0 << HPC3_DMACFG_D3R_SHIFT) | \ 850 (2 << HPC3_DMACFG_D4R_SHIFT) | \ 851 (2 << HPC3_DMACFG_D5R_SHIFT) | \ 852 (0 << HPC3_DMACFG_D3W_SHIFT) | \ 853 (2 << HPC3_DMACFG_D4W_SHIFT) | \ 854 (2 << HPC3_DMACFG_D5W_SHIFT) | \ 855 HPC3_DMACFG_DS16 | \ 856 HPC3_DMACFG_EVENHI | \ 857 HPC3_DMACFG_RTIME | \ 858 (8 << HPC3_DMACFG_BURST_SHIFT) | \ 859 HPC3_DMACFG_DRQLIVE) 860 /* 861 * Ignore what's mentioned in the specification and write value which 862 * works in The Real World (TM) 863 */ 864 hpc3->pbus_dmacfg[hal2->dac.pbus.pbusnr][0] = 0x8208844; 865 hpc3->pbus_dmacfg[hal2->adc.pbus.pbusnr][0] = 0x8208844; 866 867 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, hal2, &hal2_ops); 868 if (err < 0) { 869 free_irq(SGI_HPCDMA_IRQ, hal2); 870 kfree(hal2); 871 return err; 872 } 873 *rchip = hal2; 874 return 0; 875 } 876 877 static int hal2_probe(struct platform_device *pdev) 878 { 879 struct snd_card *card; 880 struct snd_hal2 *chip; 881 int err; 882 883 err = snd_card_new(&pdev->dev, index, id, THIS_MODULE, 0, &card); 884 if (err < 0) 885 return err; 886 887 err = hal2_create(card, &chip); 888 if (err < 0) { 889 snd_card_free(card); 890 return err; 891 } 892 893 err = hal2_pcm_create(chip); 894 if (err < 0) { 895 snd_card_free(card); 896 return err; 897 } 898 err = hal2_mixer_create(chip); 899 if (err < 0) { 900 snd_card_free(card); 901 return err; 902 } 903 904 strcpy(card->driver, "SGI HAL2 Audio"); 905 strcpy(card->shortname, "SGI HAL2 Audio"); 906 sprintf(card->longname, "%s irq %i", 907 card->shortname, 908 SGI_HPCDMA_IRQ); 909 910 err = snd_card_register(card); 911 if (err < 0) { 912 snd_card_free(card); 913 return err; 914 } 915 platform_set_drvdata(pdev, card); 916 return 0; 917 } 918 919 static int hal2_remove(struct platform_device *pdev) 920 { 921 struct snd_card *card = platform_get_drvdata(pdev); 922 923 snd_card_free(card); 924 return 0; 925 } 926 927 static struct platform_driver hal2_driver = { 928 .probe = hal2_probe, 929 .remove = hal2_remove, 930 .driver = { 931 .name = "sgihal2", 932 } 933 }; 934 935 module_platform_driver(hal2_driver); 936