diff options
Diffstat (limited to 'sound/oss/emu10k1/cardwo.c')
| -rw-r--r-- | sound/oss/emu10k1/cardwo.c | 643 |
1 files changed, 643 insertions, 0 deletions
diff --git a/sound/oss/emu10k1/cardwo.c b/sound/oss/emu10k1/cardwo.c new file mode 100644 index 0000000..54daca4 --- /dev/null +++ b/sound/oss/emu10k1/cardwo.c @@ -0,0 +1,643 @@ +/* + ********************************************************************** + * cardwo.c - PCM output HAL for emu10k1 driver + * Copyright 1999, 2000 Creative Labs, Inc. + * + ********************************************************************** + * + * Date Author Summary of changes + * ---- ------ ------------------ + * October 20, 1999 Bertrand Lee base code release + * + ********************************************************************** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the Free + * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, + * USA. + * + ********************************************************************** + */ + +#include <linux/poll.h> +#include "hwaccess.h" +#include "8010.h" +#include "voicemgr.h" +#include "cardwo.h" +#include "audio.h" + +static u32 samplerate_to_linearpitch(u32 samplingrate) +{ + samplingrate = (samplingrate << 8) / 375; + return (samplingrate >> 1) + (samplingrate & 1); +} + +static void query_format(struct emu10k1_wavedevice *wave_dev, struct wave_format *wave_fmt) +{ + int i, j, do_passthrough = 0, is_ac3 = 0; + struct emu10k1_card *card = wave_dev->card; + struct woinst *woinst = wave_dev->woinst; + + if ((wave_fmt->channels > 2) && (wave_fmt->id != AFMT_S16_LE) && (wave_fmt->id != AFMT_U8)) + wave_fmt->channels = 2; + + if ((wave_fmt->channels < 1) || (wave_fmt->channels > WAVEOUT_MAXVOICES)) + wave_fmt->channels = 2; + + if (wave_fmt->channels == 2) + woinst->num_voices = 1; + else + woinst->num_voices = wave_fmt->channels; + + if (wave_fmt->samplingrate >= 0x2ee00) + wave_fmt->samplingrate = 0x2ee00; + + wave_fmt->passthrough = 0; + do_passthrough = is_ac3 = 0; + + if (card->pt.selected) + do_passthrough = 1; + + switch (wave_fmt->id) { + case AFMT_S16_LE: + wave_fmt->bitsperchannel = 16; + break; + case AFMT_U8: + wave_fmt->bitsperchannel = 8; + break; + case AFMT_AC3: + do_passthrough = 1; + is_ac3 = 1; + break; + default: + wave_fmt->id = AFMT_S16_LE; + wave_fmt->bitsperchannel = 16; + break; + } + if (do_passthrough) { + /* currently only one waveout instance may use pass-through */ + if (woinst->state != WAVE_STATE_CLOSED || + card->pt.state != PT_STATE_INACTIVE || + (wave_fmt->samplingrate != 48000 && !is_ac3)) { + DPF(2, "unable to set pass-through mode\n"); + } else if (USE_PT_METHOD1) { + i = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name, card->pt.intr_gpr_name); + j = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name, card->pt.enable_gpr_name); + if (i < 0 || j < 0) + DPF(2, "unable to set pass-through mode\n"); + else { + wave_fmt->samplingrate = 48000; + wave_fmt->channels = 2; + card->pt.pos_gpr = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name, + card->pt.pos_gpr_name); + wave_fmt->passthrough = 1; + card->pt.intr_gpr = i; + card->pt.enable_gpr = j; + card->pt.state = PT_STATE_INACTIVE; + + DPD(2, "is_ac3 is %d\n", is_ac3); + card->pt.ac3data = is_ac3; + wave_fmt->bitsperchannel = 16; + } + }else{ + DPF(2, "Using Passthrough Method 2\n"); + card->pt.enable_gpr = emu10k1_find_control_gpr(&card->mgr, card->pt.patch_name, + card->pt.enable_gpr_name); + wave_fmt->passthrough = 2; + wave_fmt->bitsperchannel = 16; + } + } + + wave_fmt->bytesperchannel = wave_fmt->bitsperchannel >> 3; + wave_fmt->bytespersample = wave_fmt->channels * wave_fmt->bytesperchannel; + wave_fmt->bytespersec = wave_fmt->bytespersample * wave_fmt->samplingrate; + + if (wave_fmt->channels == 2) + wave_fmt->bytespervoicesample = wave_fmt->channels * wave_fmt->bytesperchannel; + else + wave_fmt->bytespervoicesample = wave_fmt->bytesperchannel; +} + +static int get_voice(struct emu10k1_card *card, struct woinst *woinst, unsigned int voicenum) +{ + struct emu_voice *voice = &woinst->voice[voicenum]; + + /* Allocate voices here, if no voices available, return error. */ + + voice->usage = VOICE_USAGE_PLAYBACK; + + voice->flags = 0; + + if (woinst->format.channels == 2) + voice->flags |= VOICE_FLAGS_STEREO; + + if (woinst->format.bitsperchannel == 16) + voice->flags |= VOICE_FLAGS_16BIT; + + if (emu10k1_voice_alloc(card, voice) < 0) { + voice->usage = VOICE_USAGE_FREE; + return -1; + } + + /* Calculate pitch */ + voice->initial_pitch = (u16) (srToPitch(woinst->format.samplingrate) >> 8); + voice->pitch_target = samplerate_to_linearpitch(woinst->format.samplingrate); + + DPD(2, "Initial pitch --> %#x\n", voice->initial_pitch); + + voice->startloop = (voice->mem.emupageindex << 12) / + woinst->format.bytespervoicesample; + voice->endloop = voice->startloop + woinst->buffer.size / woinst->format.bytespervoicesample; + voice->start = voice->startloop; + + + voice->params[0].volume_target = 0xffff; + voice->params[0].initial_fc = 0xff; + voice->params[0].initial_attn = 0x00; + voice->params[0].byampl_env_sustain = 0x7f; + voice->params[0].byampl_env_decay = 0x7f; + + + if (voice->flags & VOICE_FLAGS_STEREO) { + if (woinst->format.passthrough == 2) { + voice->params[0].send_routing = voice->params[1].send_routing = card->waveout.send_routing[ROUTE_PT]; + voice->params[0].send_routing2 = voice->params[1].send_routing2 = card->waveout.send_routing2[ROUTE_PT]; + voice->params[0].send_dcba = 0xff; + voice->params[1].send_dcba = 0xff00; + voice->params[0].send_hgfe = voice->params[1].send_hgfe=0; + } else { + voice->params[0].send_dcba = card->waveout.send_dcba[SEND_LEFT]; + voice->params[0].send_hgfe = card->waveout.send_hgfe[SEND_LEFT]; + voice->params[1].send_dcba = card->waveout.send_dcba[SEND_RIGHT]; + voice->params[1].send_hgfe = card->waveout.send_hgfe[SEND_RIGHT]; + + if (woinst->device) { + // /dev/dps1 + voice->params[0].send_routing = voice->params[1].send_routing = card->waveout.send_routing[ROUTE_PCM1]; + voice->params[0].send_routing2 = voice->params[1].send_routing2 = card->waveout.send_routing2[ROUTE_PCM1]; + } else { + voice->params[0].send_routing = voice->params[1].send_routing = card->waveout.send_routing[ROUTE_PCM]; + voice->params[0].send_routing2 = voice->params[1].send_routing2 = card->waveout.send_routing2[ROUTE_PCM]; + } + } + + voice->params[1].volume_target = 0xffff; + voice->params[1].initial_fc = 0xff; + voice->params[1].initial_attn = 0x00; + voice->params[1].byampl_env_sustain = 0x7f; + voice->params[1].byampl_env_decay = 0x7f; + } else { + if (woinst->num_voices > 1) { + // Multichannel pcm + voice->params[0].send_dcba=0xff; + voice->params[0].send_hgfe=0; + if (card->is_audigy) { + voice->params[0].send_routing = 0x3f3f3f00 + card->mchannel_fx + voicenum; + voice->params[0].send_routing2 = 0x3f3f3f3f; + } else { + voice->params[0].send_routing = 0xfff0 + card->mchannel_fx + voicenum; + } + + } else { + voice->params[0].send_dcba = card->waveout.send_dcba[SEND_MONO]; + voice->params[0].send_hgfe = card->waveout.send_hgfe[SEND_MONO]; + + if (woinst->device) { + voice->params[0].send_routing = card->waveout.send_routing[ROUTE_PCM1]; + voice->params[0].send_routing2 = card->waveout.send_routing2[ROUTE_PCM1]; + } else { + voice->params[0].send_routing = card->waveout.send_routing[ROUTE_PCM]; + voice->params[0].send_routing2 = card->waveout.send_routing2[ROUTE_PCM]; + } + } + } + + DPD(2, "voice: startloop=%#x, endloop=%#x\n", voice->startloop, voice->endloop); + + emu10k1_voice_playback_setup(voice); + + return 0; +} + +int emu10k1_waveout_open(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct woinst *woinst = wave_dev->woinst; + struct waveout_buffer *buffer = &woinst->buffer; + unsigned int voicenum; + u16 delay; + + DPF(2, "emu10k1_waveout_open()\n"); + + for (voicenum = 0; voicenum < woinst->num_voices; voicenum++) { + if (emu10k1_voice_alloc_buffer(card, &woinst->voice[voicenum].mem, woinst->buffer.pages) < 0) { + ERROR(); + emu10k1_waveout_close(wave_dev); + return -1; + } + + if (get_voice(card, woinst, voicenum) < 0) { + ERROR(); + emu10k1_waveout_close(wave_dev); + return -1; + } + } + + buffer->fill_silence = 0; + buffer->silence_bytes = 0; + buffer->silence_pos = 0; + buffer->hw_pos = 0; + buffer->free_bytes = woinst->buffer.size; + + delay = (48000 * woinst->buffer.fragment_size) / + (woinst->format.samplingrate * woinst->format.bytespervoicesample); + + emu10k1_timer_install(card, &woinst->timer, delay); + + woinst->state = WAVE_STATE_OPEN; + + return 0; +} + +void emu10k1_waveout_close(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct woinst *woinst = wave_dev->woinst; + unsigned int voicenum; + + DPF(2, "emu10k1_waveout_close()\n"); + + emu10k1_waveout_stop(wave_dev); + + emu10k1_timer_uninstall(card, &woinst->timer); + + for (voicenum = 0; voicenum < woinst->num_voices; voicenum++) { + emu10k1_voice_free(&woinst->voice[voicenum]); + emu10k1_voice_free_buffer(card, &woinst->voice[voicenum].mem); + } + + woinst->state = WAVE_STATE_CLOSED; +} + +void emu10k1_waveout_start(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct woinst *woinst = wave_dev->woinst; + struct pt_data *pt = &card->pt; + + DPF(2, "emu10k1_waveout_start()\n"); + + if (woinst->format.passthrough == 2) { + emu10k1_pt_setup(wave_dev); + sblive_writeptr(card, (card->is_audigy ? A_GPR_BASE : GPR_BASE) + pt->enable_gpr, 0, 1); + pt->state = PT_STATE_PLAYING; + } + + /* Actual start */ + emu10k1_voices_start(woinst->voice, woinst->num_voices, woinst->total_played); + + emu10k1_timer_enable(card, &woinst->timer); + + woinst->state |= WAVE_STATE_STARTED; +} + +int emu10k1_waveout_setformat(struct emu10k1_wavedevice *wave_dev, struct wave_format *format) +{ + struct emu10k1_card *card = wave_dev->card; + struct woinst *woinst = wave_dev->woinst; + unsigned int voicenum; + u16 delay; + + DPF(2, "emu10k1_waveout_setformat()\n"); + + if (woinst->state & WAVE_STATE_STARTED) + return -1; + + query_format(wave_dev, format); + + if (woinst->format.samplingrate != format->samplingrate || + woinst->format.channels != format->channels || + woinst->format.bitsperchannel != format->bitsperchannel) { + + woinst->format = *format; + + if (woinst->state == WAVE_STATE_CLOSED) + return 0; + + emu10k1_timer_uninstall(card, &woinst->timer); + + for (voicenum = 0; voicenum < woinst->num_voices; voicenum++) { + emu10k1_voice_free(&woinst->voice[voicenum]); + + if (get_voice(card, woinst, voicenum) < 0) { + ERROR(); + emu10k1_waveout_close(wave_dev); + return -1; + } + } + + delay = (48000 * woinst->buffer.fragment_size) / + (woinst->format.samplingrate * woinst->format.bytespervoicesample); + + emu10k1_timer_install(card, &woinst->timer, delay); + } + + return 0; +} + +void emu10k1_waveout_stop(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct woinst *woinst = wave_dev->woinst; + + DPF(2, "emu10k1_waveout_stop()\n"); + + if (!(woinst->state & WAVE_STATE_STARTED)) + return; + + emu10k1_timer_disable(card, &woinst->timer); + + /* Stop actual voices */ + emu10k1_voices_stop(woinst->voice, woinst->num_voices); + + emu10k1_waveout_update(woinst); + + woinst->state &= ~WAVE_STATE_STARTED; +} + +/** + * emu10k1_waveout_getxfersize - + * + * gives the total free bytes on the voice buffer, including silence bytes + * (basically: total_free_bytes = free_bytes + silence_bytes). + * + */ +void emu10k1_waveout_getxfersize(struct woinst *woinst, u32 *total_free_bytes) +{ + struct waveout_buffer *buffer = &woinst->buffer; + int pending_bytes; + + if (woinst->mmapped) { + *total_free_bytes = buffer->free_bytes; + return; + } + + pending_bytes = buffer->size - buffer->free_bytes; + + buffer->fill_silence = (pending_bytes < (signed) buffer->fragment_size * 2) ? 1 : 0; + + if (pending_bytes > (signed) buffer->silence_bytes) { + *total_free_bytes = (buffer->free_bytes + buffer->silence_bytes); + } else { + *total_free_bytes = buffer->size; + buffer->silence_bytes = pending_bytes; + if (pending_bytes < 0) { + buffer->silence_pos = buffer->hw_pos; + buffer->silence_bytes = 0; + buffer->free_bytes = buffer->size; + DPF(1, "buffer underrun\n"); + } + } +} + +/** + * copy_block - + * + * copies a block of pcm data to a voice buffer. + * Notice that the voice buffer is actually a set of disjointed memory pages. + * + */ +static void copy_block(void **dst, u32 str, u8 __user *src, u32 len) +{ + unsigned int pg; + unsigned int pgoff; + unsigned int k; + + pg = str / PAGE_SIZE; + pgoff = str % PAGE_SIZE; + + if (len > PAGE_SIZE - pgoff) { + k = PAGE_SIZE - pgoff; + if (__copy_from_user((u8 *)dst[pg] + pgoff, src, k)) + return; + len -= k; + while (len > PAGE_SIZE) { + if (__copy_from_user(dst[++pg], src + k, PAGE_SIZE)) + return; + k += PAGE_SIZE; + len -= PAGE_SIZE; + } + if (__copy_from_user(dst[++pg], src + k, len)) + return; + + } else + __copy_from_user((u8 *)dst[pg] + pgoff, src, len); +} + +/** + * copy_ilv_block - + * + * copies a block of pcm data containing n interleaved channels to n mono voice buffers. + * Notice that the voice buffer is actually a set of disjointed memory pages. + * + */ +static void copy_ilv_block(struct woinst *woinst, u32 str, u8 __user *src, u32 len) +{ + unsigned int pg; + unsigned int pgoff; + unsigned int voice_num; + struct emu_voice *voice = woinst->voice; + + pg = str / PAGE_SIZE; + pgoff = str % PAGE_SIZE; + + while (len) { + for (voice_num = 0; voice_num < woinst->num_voices; voice_num++) { + if (__copy_from_user((u8 *)(voice[voice_num].mem.addr[pg]) + pgoff, src, woinst->format.bytespervoicesample)) + return; + src += woinst->format.bytespervoicesample; + } + + len -= woinst->format.bytespervoicesample; + + pgoff += woinst->format.bytespervoicesample; + if (pgoff >= PAGE_SIZE) { + pgoff = 0; + pg++; + } + } +} + +/** + * fill_block - + * + * fills a set voice buffers with a block of a given sample. + * + */ +static void fill_block(struct woinst *woinst, u32 str, u8 data, u32 len) +{ + unsigned int pg; + unsigned int pgoff; + unsigned int voice_num; + struct emu_voice *voice = woinst->voice; + unsigned int k; + + pg = str / PAGE_SIZE; + pgoff = str % PAGE_SIZE; + + if (len > PAGE_SIZE - pgoff) { + k = PAGE_SIZE - pgoff; + for (voice_num = 0; voice_num < woinst->num_voices; voice_num++) + memset((u8 *)voice[voice_num].mem.addr[pg] + pgoff, data, k); + len -= k; + while (len > PAGE_SIZE) { + pg++; + for (voice_num = 0; voice_num < woinst->num_voices; voice_num++) + memset(voice[voice_num].mem.addr[pg], data, PAGE_SIZE); + + len -= PAGE_SIZE; + } + pg++; + for (voice_num = 0; voice_num < woinst->num_voices; voice_num++) + memset(voice[voice_num].mem.addr[pg], data, len); + + } else { + for (voice_num = 0; voice_num < woinst->num_voices; voice_num++) + memset((u8 *)voice[voice_num].mem.addr[pg] + pgoff, data, len); + } +} + +/** + * emu10k1_waveout_xferdata - + * + * copies pcm data to the voice buffer. Silence samples + * previously added to the buffer are overwritten. + * + */ +void emu10k1_waveout_xferdata(struct woinst *woinst, u8 __user *data, u32 *size) +{ + struct waveout_buffer *buffer = &woinst->buffer; + struct voice_mem *mem = &woinst->voice[0].mem; + u32 sizetocopy, sizetocopy_now, start; + unsigned long flags; + + sizetocopy = min_t(u32, buffer->size, *size); + *size = sizetocopy; + + if (!sizetocopy) + return; + + spin_lock_irqsave(&woinst->lock, flags); + start = (buffer->size + buffer->silence_pos - buffer->silence_bytes) % buffer->size; + + if (sizetocopy > buffer->silence_bytes) { + buffer->silence_pos += sizetocopy - buffer->silence_bytes; + buffer->free_bytes -= sizetocopy - buffer->silence_bytes; + buffer->silence_bytes = 0; + } else + buffer->silence_bytes -= sizetocopy; + + spin_unlock_irqrestore(&woinst->lock, flags); + + sizetocopy_now = buffer->size - start; + if (sizetocopy > sizetocopy_now) { + sizetocopy -= sizetocopy_now; + if (woinst->num_voices > 1) { + copy_ilv_block(woinst, start, data, sizetocopy_now); + copy_ilv_block(woinst, 0, data + sizetocopy_now * woinst->num_voices, sizetocopy); + } else { + copy_block(mem->addr, start, data, sizetocopy_now); + copy_block(mem->addr, 0, data + sizetocopy_now, sizetocopy); + } + } else { + if (woinst->num_voices > 1) + copy_ilv_block(woinst, start, data, sizetocopy); + else + copy_block(mem->addr, start, data, sizetocopy); + } +} + +/** + * emu10k1_waveout_fillsilence - + * + * adds samples of silence to the voice buffer so that we + * don't loop over stale pcm data. + * + */ +void emu10k1_waveout_fillsilence(struct woinst *woinst) +{ + struct waveout_buffer *buffer = &woinst->buffer; + u32 sizetocopy, sizetocopy_now, start; + u8 filldata; + unsigned long flags; + + sizetocopy = buffer->fragment_size; + + if (woinst->format.bitsperchannel == 16) + filldata = 0x00; + else + filldata = 0x80; + + spin_lock_irqsave(&woinst->lock, flags); + buffer->silence_bytes += sizetocopy; + buffer->free_bytes -= sizetocopy; + buffer->silence_pos %= buffer->size; + start = buffer->silence_pos; + buffer->silence_pos += sizetocopy; + spin_unlock_irqrestore(&woinst->lock, flags); + + sizetocopy_now = buffer->size - start; + + if (sizetocopy > sizetocopy_now) { + sizetocopy -= sizetocopy_now; + fill_block(woinst, start, filldata, sizetocopy_now); + fill_block(woinst, 0, filldata, sizetocopy); + } else { + fill_block(woinst, start, filldata, sizetocopy); + } +} + +/** + * emu10k1_waveout_update - + * + * updates the position of the voice buffer hardware pointer (hw_pos) + * and the number of free bytes on the buffer (free_bytes). + * The free bytes _don't_ include silence bytes that may have been + * added to the buffer. + * + */ +void emu10k1_waveout_update(struct woinst *woinst) +{ + u32 hw_pos; + u32 diff; + + /* There is no actual start yet */ + if (!(woinst->state & WAVE_STATE_STARTED)) { + hw_pos = woinst->buffer.hw_pos; + } else { + /* hw_pos in sample units */ + hw_pos = sblive_readptr(woinst->voice[0].card, CCCA_CURRADDR, woinst->voice[0].num); + + if(hw_pos < woinst->voice[0].start) + hw_pos += woinst->buffer.size / woinst->format.bytespervoicesample - woinst->voice[0].start; + else + hw_pos -= woinst->voice[0].start; + + hw_pos *= woinst->format.bytespervoicesample; + } + + diff = (woinst->buffer.size + hw_pos - woinst->buffer.hw_pos) % woinst->buffer.size; + woinst->total_played += diff; + woinst->buffer.free_bytes += diff; + woinst->buffer.hw_pos = hw_pos; +} |
