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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Sound driver for Silicon Graphics O2 Workstations A/V board audio.4 *5 * Copyright 2003 Vivien Chappelier <vivien.chappelier@linux-mips.org>6 * Copyright 2008 Thomas Bogendoerfer <tsbogend@alpha.franken.de>7 * Mxier part taken from mace_audio.c:8 * Copyright 2007 Thorben Jändling <tj.trevelyan@gmail.com>9 */10 11#include <linux/init.h>12#include <linux/delay.h>13#include <linux/spinlock.h>14#include <linux/interrupt.h>15#include <linux/dma-mapping.h>16#include <linux/platform_device.h>17#include <linux/io.h>18#include <linux/slab.h>19#include <linux/module.h>20 21#include <asm/ip32/ip32_ints.h>22#include <asm/ip32/mace.h>23 24#include <sound/core.h>25#include <sound/control.h>26#include <sound/pcm.h>27#define SNDRV_GET_ID28#include <sound/initval.h>29#include <sound/ad1843.h>30 31 32MODULE_AUTHOR("Vivien Chappelier <vivien.chappelier@linux-mips.org>");33MODULE_DESCRIPTION("SGI O2 Audio");34MODULE_LICENSE("GPL");35 36static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */37static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */38 39module_param(index, int, 0444);40MODULE_PARM_DESC(index, "Index value for SGI O2 soundcard.");41module_param(id, charp, 0444);42MODULE_PARM_DESC(id, "ID string for SGI O2 soundcard.");43 44 45#define AUDIO_CONTROL_RESET BIT(0) /* 1: reset audio interface */46#define AUDIO_CONTROL_CODEC_PRESENT BIT(1) /* 1: codec detected */47 48#define CODEC_CONTROL_WORD_SHIFT 049#define CODEC_CONTROL_READ BIT(16)50#define CODEC_CONTROL_ADDRESS_SHIFT 1751 52#define CHANNEL_CONTROL_RESET BIT(10) /* 1: reset channel */53#define CHANNEL_DMA_ENABLE BIT(9) /* 1: enable DMA transfer */54#define CHANNEL_INT_THRESHOLD_DISABLED (0 << 5) /* interrupt disabled */55#define CHANNEL_INT_THRESHOLD_25 (1 << 5) /* int on buffer >25% full */56#define CHANNEL_INT_THRESHOLD_50 (2 << 5) /* int on buffer >50% full */57#define CHANNEL_INT_THRESHOLD_75 (3 << 5) /* int on buffer >75% full */58#define CHANNEL_INT_THRESHOLD_EMPTY (4 << 5) /* int on buffer empty */59#define CHANNEL_INT_THRESHOLD_NOT_EMPTY (5 << 5) /* int on buffer !empty */60#define CHANNEL_INT_THRESHOLD_FULL (6 << 5) /* int on buffer empty */61#define CHANNEL_INT_THRESHOLD_NOT_FULL (7 << 5) /* int on buffer !empty */62 63#define CHANNEL_RING_SHIFT 1264#define CHANNEL_RING_SIZE (1 << CHANNEL_RING_SHIFT)65#define CHANNEL_RING_MASK (CHANNEL_RING_SIZE - 1)66 67#define CHANNEL_LEFT_SHIFT 4068#define CHANNEL_RIGHT_SHIFT 869 70struct snd_sgio2audio_chan {71 int idx;72 struct snd_pcm_substream *substream;73 int pos;74 snd_pcm_uframes_t size;75 spinlock_t lock;76};77 78/* definition of the chip-specific record */79struct snd_sgio2audio {80 struct snd_card *card;81 82 /* codec */83 struct snd_ad1843 ad1843;84 spinlock_t ad1843_lock;85 86 /* channels */87 struct snd_sgio2audio_chan channel[3];88 89 /* resources */90 void *ring_base;91 dma_addr_t ring_base_dma;92};93 94/* AD1843 access */95 96/*97 * read_ad1843_reg returns the current contents of a 16 bit AD1843 register.98 *99 * Returns unsigned register value on success, -errno on failure.100 */101static int read_ad1843_reg(void *priv, int reg)102{103 struct snd_sgio2audio *chip = priv;104 int val;105 unsigned long flags;106 107 spin_lock_irqsave(&chip->ad1843_lock, flags);108 109 writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |110 CODEC_CONTROL_READ, &mace->perif.audio.codec_control);111 wmb();112 val = readq(&mace->perif.audio.codec_control); /* flush bus */113 udelay(200);114 115 val = readq(&mace->perif.audio.codec_read);116 117 spin_unlock_irqrestore(&chip->ad1843_lock, flags);118 return val;119}120 121/*122 * write_ad1843_reg writes the specified value to a 16 bit AD1843 register.123 */124static int write_ad1843_reg(void *priv, int reg, int word)125{126 struct snd_sgio2audio *chip = priv;127 int val;128 unsigned long flags;129 130 spin_lock_irqsave(&chip->ad1843_lock, flags);131 132 writeq((reg << CODEC_CONTROL_ADDRESS_SHIFT) |133 (word << CODEC_CONTROL_WORD_SHIFT),134 &mace->perif.audio.codec_control);135 wmb();136 val = readq(&mace->perif.audio.codec_control); /* flush bus */137 udelay(200);138 139 spin_unlock_irqrestore(&chip->ad1843_lock, flags);140 return 0;141}142 143static int sgio2audio_gain_info(struct snd_kcontrol *kcontrol,144 struct snd_ctl_elem_info *uinfo)145{146 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);147 148 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;149 uinfo->count = 2;150 uinfo->value.integer.min = 0;151 uinfo->value.integer.max = ad1843_get_gain_max(&chip->ad1843,152 (int)kcontrol->private_value);153 return 0;154}155 156static int sgio2audio_gain_get(struct snd_kcontrol *kcontrol,157 struct snd_ctl_elem_value *ucontrol)158{159 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);160 int vol;161 162 vol = ad1843_get_gain(&chip->ad1843, (int)kcontrol->private_value);163 164 ucontrol->value.integer.value[0] = (vol >> 8) & 0xFF;165 ucontrol->value.integer.value[1] = vol & 0xFF;166 167 return 0;168}169 170static int sgio2audio_gain_put(struct snd_kcontrol *kcontrol,171 struct snd_ctl_elem_value *ucontrol)172{173 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);174 int newvol, oldvol;175 176 oldvol = ad1843_get_gain(&chip->ad1843, kcontrol->private_value);177 newvol = (ucontrol->value.integer.value[0] << 8) |178 ucontrol->value.integer.value[1];179 180 newvol = ad1843_set_gain(&chip->ad1843, kcontrol->private_value,181 newvol);182 183 return newvol != oldvol;184}185 186static int sgio2audio_source_info(struct snd_kcontrol *kcontrol,187 struct snd_ctl_elem_info *uinfo)188{189 static const char * const texts[3] = {190 "Cam Mic", "Mic", "Line"191 };192 return snd_ctl_enum_info(uinfo, 1, 3, texts);193}194 195static int sgio2audio_source_get(struct snd_kcontrol *kcontrol,196 struct snd_ctl_elem_value *ucontrol)197{198 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);199 200 ucontrol->value.enumerated.item[0] = ad1843_get_recsrc(&chip->ad1843);201 return 0;202}203 204static int sgio2audio_source_put(struct snd_kcontrol *kcontrol,205 struct snd_ctl_elem_value *ucontrol)206{207 struct snd_sgio2audio *chip = snd_kcontrol_chip(kcontrol);208 int newsrc, oldsrc;209 210 oldsrc = ad1843_get_recsrc(&chip->ad1843);211 newsrc = ad1843_set_recsrc(&chip->ad1843,212 ucontrol->value.enumerated.item[0]);213 214 return newsrc != oldsrc;215}216 217/* dac1/pcm0 mixer control */218static const struct snd_kcontrol_new sgio2audio_ctrl_pcm0 = {219 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,220 .name = "PCM Playback Volume",221 .index = 0,222 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,223 .private_value = AD1843_GAIN_PCM_0,224 .info = sgio2audio_gain_info,225 .get = sgio2audio_gain_get,226 .put = sgio2audio_gain_put,227};228 229/* dac2/pcm1 mixer control */230static const struct snd_kcontrol_new sgio2audio_ctrl_pcm1 = {231 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,232 .name = "PCM Playback Volume",233 .index = 1,234 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,235 .private_value = AD1843_GAIN_PCM_1,236 .info = sgio2audio_gain_info,237 .get = sgio2audio_gain_get,238 .put = sgio2audio_gain_put,239};240 241/* record level mixer control */242static const struct snd_kcontrol_new sgio2audio_ctrl_reclevel = {243 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,244 .name = "Capture Volume",245 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,246 .private_value = AD1843_GAIN_RECLEV,247 .info = sgio2audio_gain_info,248 .get = sgio2audio_gain_get,249 .put = sgio2audio_gain_put,250};251 252/* record level source control */253static const struct snd_kcontrol_new sgio2audio_ctrl_recsource = {254 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,255 .name = "Capture Source",256 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,257 .info = sgio2audio_source_info,258 .get = sgio2audio_source_get,259 .put = sgio2audio_source_put,260};261 262/* line mixer control */263static const struct snd_kcontrol_new sgio2audio_ctrl_line = {264 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,265 .name = "Line Playback Volume",266 .index = 0,267 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,268 .private_value = AD1843_GAIN_LINE,269 .info = sgio2audio_gain_info,270 .get = sgio2audio_gain_get,271 .put = sgio2audio_gain_put,272};273 274/* cd mixer control */275static const struct snd_kcontrol_new sgio2audio_ctrl_cd = {276 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,277 .name = "Line Playback Volume",278 .index = 1,279 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,280 .private_value = AD1843_GAIN_LINE_2,281 .info = sgio2audio_gain_info,282 .get = sgio2audio_gain_get,283 .put = sgio2audio_gain_put,284};285 286/* mic mixer control */287static const struct snd_kcontrol_new sgio2audio_ctrl_mic = {288 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,289 .name = "Mic Playback Volume",290 .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,291 .private_value = AD1843_GAIN_MIC,292 .info = sgio2audio_gain_info,293 .get = sgio2audio_gain_get,294 .put = sgio2audio_gain_put,295};296 297 298static int snd_sgio2audio_new_mixer(struct snd_sgio2audio *chip)299{300 int err;301 302 err = snd_ctl_add(chip->card,303 snd_ctl_new1(&sgio2audio_ctrl_pcm0, chip));304 if (err < 0)305 return err;306 307 err = snd_ctl_add(chip->card,308 snd_ctl_new1(&sgio2audio_ctrl_pcm1, chip));309 if (err < 0)310 return err;311 312 err = snd_ctl_add(chip->card,313 snd_ctl_new1(&sgio2audio_ctrl_reclevel, chip));314 if (err < 0)315 return err;316 317 err = snd_ctl_add(chip->card,318 snd_ctl_new1(&sgio2audio_ctrl_recsource, chip));319 if (err < 0)320 return err;321 err = snd_ctl_add(chip->card,322 snd_ctl_new1(&sgio2audio_ctrl_line, chip));323 if (err < 0)324 return err;325 326 err = snd_ctl_add(chip->card,327 snd_ctl_new1(&sgio2audio_ctrl_cd, chip));328 if (err < 0)329 return err;330 331 err = snd_ctl_add(chip->card,332 snd_ctl_new1(&sgio2audio_ctrl_mic, chip));333 if (err < 0)334 return err;335 336 return 0;337}338 339/* low-level audio interface DMA */340 341/* get data out of bounce buffer, count must be a multiple of 32 */342/* returns 1 if a period has elapsed */343static int snd_sgio2audio_dma_pull_frag(struct snd_sgio2audio *chip,344 unsigned int ch, unsigned int count)345{346 int ret;347 unsigned long src_base, src_pos, dst_mask;348 unsigned char *dst_base;349 int dst_pos;350 u64 *src;351 s16 *dst;352 u64 x;353 unsigned long flags;354 struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;355 356 spin_lock_irqsave(&chip->channel[ch].lock, flags);357 358 src_base = (unsigned long) chip->ring_base | (ch << CHANNEL_RING_SHIFT);359 src_pos = readq(&mace->perif.audio.chan[ch].read_ptr);360 dst_base = runtime->dma_area;361 dst_pos = chip->channel[ch].pos;362 dst_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;363 364 /* check if a period has elapsed */365 chip->channel[ch].size += (count >> 3); /* in frames */366 ret = chip->channel[ch].size >= runtime->period_size;367 chip->channel[ch].size %= runtime->period_size;368 369 while (count) {370 src = (u64 *)(src_base + src_pos);371 dst = (s16 *)(dst_base + dst_pos);372 373 x = *src;374 dst[0] = (x >> CHANNEL_LEFT_SHIFT) & 0xffff;375 dst[1] = (x >> CHANNEL_RIGHT_SHIFT) & 0xffff;376 377 src_pos = (src_pos + sizeof(u64)) & CHANNEL_RING_MASK;378 dst_pos = (dst_pos + 2 * sizeof(s16)) & dst_mask;379 count -= sizeof(u64);380 }381 382 writeq(src_pos, &mace->perif.audio.chan[ch].read_ptr); /* in bytes */383 chip->channel[ch].pos = dst_pos;384 385 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);386 return ret;387}388 389/* put some DMA data in bounce buffer, count must be a multiple of 32 */390/* returns 1 if a period has elapsed */391static int snd_sgio2audio_dma_push_frag(struct snd_sgio2audio *chip,392 unsigned int ch, unsigned int count)393{394 int ret;395 s64 l, r;396 unsigned long dst_base, dst_pos, src_mask;397 unsigned char *src_base;398 int src_pos;399 u64 *dst;400 s16 *src;401 unsigned long flags;402 struct snd_pcm_runtime *runtime = chip->channel[ch].substream->runtime;403 404 spin_lock_irqsave(&chip->channel[ch].lock, flags);405 406 dst_base = (unsigned long)chip->ring_base | (ch << CHANNEL_RING_SHIFT);407 dst_pos = readq(&mace->perif.audio.chan[ch].write_ptr);408 src_base = runtime->dma_area;409 src_pos = chip->channel[ch].pos;410 src_mask = frames_to_bytes(runtime, runtime->buffer_size) - 1;411 412 /* check if a period has elapsed */413 chip->channel[ch].size += (count >> 3); /* in frames */414 ret = chip->channel[ch].size >= runtime->period_size;415 chip->channel[ch].size %= runtime->period_size;416 417 while (count) {418 src = (s16 *)(src_base + src_pos);419 dst = (u64 *)(dst_base + dst_pos);420 421 l = src[0]; /* sign extend */422 r = src[1]; /* sign extend */423 424 *dst = ((l & 0x00ffffff) << CHANNEL_LEFT_SHIFT) |425 ((r & 0x00ffffff) << CHANNEL_RIGHT_SHIFT);426 427 dst_pos = (dst_pos + sizeof(u64)) & CHANNEL_RING_MASK;428 src_pos = (src_pos + 2 * sizeof(s16)) & src_mask;429 count -= sizeof(u64);430 }431 432 writeq(dst_pos, &mace->perif.audio.chan[ch].write_ptr); /* in bytes */433 chip->channel[ch].pos = src_pos;434 435 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);436 return ret;437}438 439static int snd_sgio2audio_dma_start(struct snd_pcm_substream *substream)440{441 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);442 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;443 int ch = chan->idx;444 445 /* reset DMA channel */446 writeq(CHANNEL_CONTROL_RESET, &mace->perif.audio.chan[ch].control);447 udelay(10);448 writeq(0, &mace->perif.audio.chan[ch].control);449 450 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {451 /* push a full buffer */452 snd_sgio2audio_dma_push_frag(chip, ch, CHANNEL_RING_SIZE - 32);453 }454 /* set DMA to wake on 50% empty and enable interrupt */455 writeq(CHANNEL_DMA_ENABLE | CHANNEL_INT_THRESHOLD_50,456 &mace->perif.audio.chan[ch].control);457 return 0;458}459 460static int snd_sgio2audio_dma_stop(struct snd_pcm_substream *substream)461{462 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;463 464 writeq(0, &mace->perif.audio.chan[chan->idx].control);465 return 0;466}467 468static irqreturn_t snd_sgio2audio_dma_in_isr(int irq, void *dev_id)469{470 struct snd_sgio2audio_chan *chan = dev_id;471 struct snd_pcm_substream *substream;472 struct snd_sgio2audio *chip;473 int count, ch;474 475 substream = chan->substream;476 chip = snd_pcm_substream_chip(substream);477 ch = chan->idx;478 479 /* empty the ring */480 count = CHANNEL_RING_SIZE -481 readq(&mace->perif.audio.chan[ch].depth) - 32;482 if (snd_sgio2audio_dma_pull_frag(chip, ch, count))483 snd_pcm_period_elapsed(substream);484 485 return IRQ_HANDLED;486}487 488static irqreturn_t snd_sgio2audio_dma_out_isr(int irq, void *dev_id)489{490 struct snd_sgio2audio_chan *chan = dev_id;491 struct snd_pcm_substream *substream;492 struct snd_sgio2audio *chip;493 int count, ch;494 495 substream = chan->substream;496 chip = snd_pcm_substream_chip(substream);497 ch = chan->idx;498 /* fill the ring */499 count = CHANNEL_RING_SIZE -500 readq(&mace->perif.audio.chan[ch].depth) - 32;501 if (snd_sgio2audio_dma_push_frag(chip, ch, count))502 snd_pcm_period_elapsed(substream);503 504 return IRQ_HANDLED;505}506 507static irqreturn_t snd_sgio2audio_error_isr(int irq, void *dev_id)508{509 struct snd_sgio2audio_chan *chan = dev_id;510 struct snd_pcm_substream *substream;511 512 substream = chan->substream;513 snd_sgio2audio_dma_stop(substream);514 snd_sgio2audio_dma_start(substream);515 return IRQ_HANDLED;516}517 518/* PCM part */519/* PCM hardware definition */520static const struct snd_pcm_hardware snd_sgio2audio_pcm_hw = {521 .info = (SNDRV_PCM_INFO_MMAP |522 SNDRV_PCM_INFO_MMAP_VALID |523 SNDRV_PCM_INFO_INTERLEAVED |524 SNDRV_PCM_INFO_BLOCK_TRANSFER),525 .formats = SNDRV_PCM_FMTBIT_S16_BE,526 .rates = SNDRV_PCM_RATE_8000_48000,527 .rate_min = 8000,528 .rate_max = 48000,529 .channels_min = 2,530 .channels_max = 2,531 .buffer_bytes_max = 65536,532 .period_bytes_min = 32768,533 .period_bytes_max = 65536,534 .periods_min = 1,535 .periods_max = 1024,536};537 538/* PCM playback open callback */539static int snd_sgio2audio_playback1_open(struct snd_pcm_substream *substream)540{541 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);542 struct snd_pcm_runtime *runtime = substream->runtime;543 544 runtime->hw = snd_sgio2audio_pcm_hw;545 runtime->private_data = &chip->channel[1];546 return 0;547}548 549static int snd_sgio2audio_playback2_open(struct snd_pcm_substream *substream)550{551 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);552 struct snd_pcm_runtime *runtime = substream->runtime;553 554 runtime->hw = snd_sgio2audio_pcm_hw;555 runtime->private_data = &chip->channel[2];556 return 0;557}558 559/* PCM capture open callback */560static int snd_sgio2audio_capture_open(struct snd_pcm_substream *substream)561{562 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);563 struct snd_pcm_runtime *runtime = substream->runtime;564 565 runtime->hw = snd_sgio2audio_pcm_hw;566 runtime->private_data = &chip->channel[0];567 return 0;568}569 570/* PCM close callback */571static int snd_sgio2audio_pcm_close(struct snd_pcm_substream *substream)572{573 struct snd_pcm_runtime *runtime = substream->runtime;574 575 runtime->private_data = NULL;576 return 0;577}578 579/* prepare callback */580static int snd_sgio2audio_pcm_prepare(struct snd_pcm_substream *substream)581{582 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);583 struct snd_pcm_runtime *runtime = substream->runtime;584 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;585 int ch = chan->idx;586 unsigned long flags;587 588 spin_lock_irqsave(&chip->channel[ch].lock, flags);589 590 /* Setup the pseudo-dma transfer pointers. */591 chip->channel[ch].pos = 0;592 chip->channel[ch].size = 0;593 chip->channel[ch].substream = substream;594 595 /* set AD1843 format */596 /* hardware format is always S16_LE */597 switch (substream->stream) {598 case SNDRV_PCM_STREAM_PLAYBACK:599 ad1843_setup_dac(&chip->ad1843,600 ch - 1,601 runtime->rate,602 SNDRV_PCM_FORMAT_S16_LE,603 runtime->channels);604 break;605 case SNDRV_PCM_STREAM_CAPTURE:606 ad1843_setup_adc(&chip->ad1843,607 runtime->rate,608 SNDRV_PCM_FORMAT_S16_LE,609 runtime->channels);610 break;611 }612 spin_unlock_irqrestore(&chip->channel[ch].lock, flags);613 return 0;614}615 616/* trigger callback */617static int snd_sgio2audio_pcm_trigger(struct snd_pcm_substream *substream,618 int cmd)619{620 switch (cmd) {621 case SNDRV_PCM_TRIGGER_START:622 /* start the PCM engine */623 snd_sgio2audio_dma_start(substream);624 break;625 case SNDRV_PCM_TRIGGER_STOP:626 /* stop the PCM engine */627 snd_sgio2audio_dma_stop(substream);628 break;629 default:630 return -EINVAL;631 }632 return 0;633}634 635/* pointer callback */636static snd_pcm_uframes_t637snd_sgio2audio_pcm_pointer(struct snd_pcm_substream *substream)638{639 struct snd_sgio2audio *chip = snd_pcm_substream_chip(substream);640 struct snd_sgio2audio_chan *chan = substream->runtime->private_data;641 642 /* get the current hardware pointer */643 return bytes_to_frames(substream->runtime,644 chip->channel[chan->idx].pos);645}646 647/* operators */648static const struct snd_pcm_ops snd_sgio2audio_playback1_ops = {649 .open = snd_sgio2audio_playback1_open,650 .close = snd_sgio2audio_pcm_close,651 .prepare = snd_sgio2audio_pcm_prepare,652 .trigger = snd_sgio2audio_pcm_trigger,653 .pointer = snd_sgio2audio_pcm_pointer,654};655 656static const struct snd_pcm_ops snd_sgio2audio_playback2_ops = {657 .open = snd_sgio2audio_playback2_open,658 .close = snd_sgio2audio_pcm_close,659 .prepare = snd_sgio2audio_pcm_prepare,660 .trigger = snd_sgio2audio_pcm_trigger,661 .pointer = snd_sgio2audio_pcm_pointer,662};663 664static const struct snd_pcm_ops snd_sgio2audio_capture_ops = {665 .open = snd_sgio2audio_capture_open,666 .close = snd_sgio2audio_pcm_close,667 .prepare = snd_sgio2audio_pcm_prepare,668 .trigger = snd_sgio2audio_pcm_trigger,669 .pointer = snd_sgio2audio_pcm_pointer,670};671 672/*673 * definitions of capture are omitted here...674 */675 676/* create a pcm device */677static int snd_sgio2audio_new_pcm(struct snd_sgio2audio *chip)678{679 struct snd_pcm *pcm;680 int err;681 682 /* create first pcm device with one outputs and one input */683 err = snd_pcm_new(chip->card, "SGI O2 Audio", 0, 1, 1, &pcm);684 if (err < 0)685 return err;686 687 pcm->private_data = chip;688 strcpy(pcm->name, "SGI O2 DAC1");689 690 /* set operators */691 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,692 &snd_sgio2audio_playback1_ops);693 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,694 &snd_sgio2audio_capture_ops);695 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);696 697 /* create second pcm device with one outputs and no input */698 err = snd_pcm_new(chip->card, "SGI O2 Audio", 1, 1, 0, &pcm);699 if (err < 0)700 return err;701 702 pcm->private_data = chip;703 strcpy(pcm->name, "SGI O2 DAC2");704 705 /* set operators */706 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,707 &snd_sgio2audio_playback2_ops);708 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC, NULL, 0, 0);709 710 return 0;711}712 713static struct {714 int idx;715 int irq;716 irqreturn_t (*isr)(int, void *);717 const char *desc;718} snd_sgio2_isr_table[] = {719 {720 .idx = 0,721 .irq = MACEISA_AUDIO1_DMAT_IRQ,722 .isr = snd_sgio2audio_dma_in_isr,723 .desc = "Capture DMA Channel 0"724 }, {725 .idx = 0,726 .irq = MACEISA_AUDIO1_OF_IRQ,727 .isr = snd_sgio2audio_error_isr,728 .desc = "Capture Overflow"729 }, {730 .idx = 1,731 .irq = MACEISA_AUDIO2_DMAT_IRQ,732 .isr = snd_sgio2audio_dma_out_isr,733 .desc = "Playback DMA Channel 1"734 }, {735 .idx = 1,736 .irq = MACEISA_AUDIO2_MERR_IRQ,737 .isr = snd_sgio2audio_error_isr,738 .desc = "Memory Error Channel 1"739 }, {740 .idx = 2,741 .irq = MACEISA_AUDIO3_DMAT_IRQ,742 .isr = snd_sgio2audio_dma_out_isr,743 .desc = "Playback DMA Channel 2"744 }, {745 .idx = 2,746 .irq = MACEISA_AUDIO3_MERR_IRQ,747 .isr = snd_sgio2audio_error_isr,748 .desc = "Memory Error Channel 2"749 }750};751 752/* ALSA driver */753 754static int snd_sgio2audio_free(struct snd_sgio2audio *chip)755{756 int i;757 758 /* reset interface */759 writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);760 udelay(1);761 writeq(0, &mace->perif.audio.control);762 763 /* release IRQ's */764 for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++)765 free_irq(snd_sgio2_isr_table[i].irq,766 &chip->channel[snd_sgio2_isr_table[i].idx]);767 768 dma_free_coherent(chip->card->dev, MACEISA_RINGBUFFERS_SIZE,769 chip->ring_base, chip->ring_base_dma);770 771 /* release card data */772 kfree(chip);773 return 0;774}775 776static int snd_sgio2audio_dev_free(struct snd_device *device)777{778 struct snd_sgio2audio *chip = device->device_data;779 780 return snd_sgio2audio_free(chip);781}782 783static const struct snd_device_ops ops = {784 .dev_free = snd_sgio2audio_dev_free,785};786 787static int snd_sgio2audio_create(struct snd_card *card,788 struct snd_sgio2audio **rchip)789{790 struct snd_sgio2audio *chip;791 int i, err;792 793 *rchip = NULL;794 795 /* check if a codec is attached to the interface */796 /* (Audio or Audio/Video board present) */797 if (!(readq(&mace->perif.audio.control) & AUDIO_CONTROL_CODEC_PRESENT))798 return -ENOENT;799 800 chip = kzalloc(sizeof(*chip), GFP_KERNEL);801 if (chip == NULL)802 return -ENOMEM;803 804 chip->card = card;805 806 chip->ring_base = dma_alloc_coherent(card->dev,807 MACEISA_RINGBUFFERS_SIZE,808 &chip->ring_base_dma, GFP_KERNEL);809 if (chip->ring_base == NULL) {810 printk(KERN_ERR811 "sgio2audio: could not allocate ring buffers\n");812 kfree(chip);813 return -ENOMEM;814 }815 816 spin_lock_init(&chip->ad1843_lock);817 818 /* initialize channels */819 for (i = 0; i < 3; i++) {820 spin_lock_init(&chip->channel[i].lock);821 chip->channel[i].idx = i;822 }823 824 /* allocate IRQs */825 for (i = 0; i < ARRAY_SIZE(snd_sgio2_isr_table); i++) {826 if (request_irq(snd_sgio2_isr_table[i].irq,827 snd_sgio2_isr_table[i].isr,828 0,829 snd_sgio2_isr_table[i].desc,830 &chip->channel[snd_sgio2_isr_table[i].idx])) {831 snd_sgio2audio_free(chip);832 printk(KERN_ERR "sgio2audio: cannot allocate irq %d\n",833 snd_sgio2_isr_table[i].irq);834 return -EBUSY;835 }836 }837 838 /* reset the interface */839 writeq(AUDIO_CONTROL_RESET, &mace->perif.audio.control);840 udelay(1);841 writeq(0, &mace->perif.audio.control);842 msleep_interruptible(1); /* give time to recover */843 844 /* set ring base */845 writeq(chip->ring_base_dma, &mace->perif.ctrl.ringbase);846 847 /* attach the AD1843 codec */848 chip->ad1843.read = read_ad1843_reg;849 chip->ad1843.write = write_ad1843_reg;850 chip->ad1843.chip = chip;851 852 /* initialize the AD1843 codec */853 err = ad1843_init(&chip->ad1843);854 if (err < 0) {855 snd_sgio2audio_free(chip);856 return err;857 }858 859 err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);860 if (err < 0) {861 snd_sgio2audio_free(chip);862 return err;863 }864 *rchip = chip;865 return 0;866}867 868static int snd_sgio2audio_probe(struct platform_device *pdev)869{870 struct snd_card *card;871 struct snd_sgio2audio *chip;872 int err;873 874 err = snd_card_new(&pdev->dev, index, id, THIS_MODULE, 0, &card);875 if (err < 0)876 return err;877 878 err = snd_sgio2audio_create(card, &chip);879 if (err < 0) {880 snd_card_free(card);881 return err;882 }883 884 err = snd_sgio2audio_new_pcm(chip);885 if (err < 0) {886 snd_card_free(card);887 return err;888 }889 err = snd_sgio2audio_new_mixer(chip);890 if (err < 0) {891 snd_card_free(card);892 return err;893 }894 895 strcpy(card->driver, "SGI O2 Audio");896 strcpy(card->shortname, "SGI O2 Audio");897 sprintf(card->longname, "%s irq %i-%i",898 card->shortname,899 MACEISA_AUDIO1_DMAT_IRQ,900 MACEISA_AUDIO3_MERR_IRQ);901 902 err = snd_card_register(card);903 if (err < 0) {904 snd_card_free(card);905 return err;906 }907 platform_set_drvdata(pdev, card);908 return 0;909}910 911static void snd_sgio2audio_remove(struct platform_device *pdev)912{913 struct snd_card *card = platform_get_drvdata(pdev);914 915 snd_card_free(card);916}917 918static struct platform_driver sgio2audio_driver = {919 .probe = snd_sgio2audio_probe,920 .remove_new = snd_sgio2audio_remove,921 .driver = {922 .name = "sgio2audio",923 }924};925 926module_platform_driver(sgio2audio_driver);927