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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /sound/oss/emu10k1/cardwi.c | |
download | op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'sound/oss/emu10k1/cardwi.c')
-rw-r--r-- | sound/oss/emu10k1/cardwi.c | 373 |
1 files changed, 373 insertions, 0 deletions
diff --git a/sound/oss/emu10k1/cardwi.c b/sound/oss/emu10k1/cardwi.c new file mode 100644 index 0000000..8bbf44b --- /dev/null +++ b/sound/oss/emu10k1/cardwi.c @@ -0,0 +1,373 @@ +/* + ********************************************************************** + * cardwi.c - PCM input 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 "timer.h" +#include "recmgr.h" +#include "audio.h" +#include "cardwi.h" + +/** + * query_format - returns a valid sound format + * + * This function will return a valid sound format as close + * to the requested one as possible. + */ +static void query_format(int recsrc, struct wave_format *wave_fmt) +{ + + switch (recsrc) { + case WAVERECORD_AC97: + + if ((wave_fmt->channels != 1) && (wave_fmt->channels != 2)) + wave_fmt->channels = 2; + + if (wave_fmt->samplingrate >= (0xBB80 + 0xAC44) / 2) + wave_fmt->samplingrate = 0xBB80; + else if (wave_fmt->samplingrate >= (0xAC44 + 0x7D00) / 2) + wave_fmt->samplingrate = 0xAC44; + else if (wave_fmt->samplingrate >= (0x7D00 + 0x5DC0) / 2) + wave_fmt->samplingrate = 0x7D00; + else if (wave_fmt->samplingrate >= (0x5DC0 + 0x5622) / 2) + wave_fmt->samplingrate = 0x5DC0; + else if (wave_fmt->samplingrate >= (0x5622 + 0x3E80) / 2) + wave_fmt->samplingrate = 0x5622; + else if (wave_fmt->samplingrate >= (0x3E80 + 0x2B11) / 2) + wave_fmt->samplingrate = 0x3E80; + else if (wave_fmt->samplingrate >= (0x2B11 + 0x1F40) / 2) + wave_fmt->samplingrate = 0x2B11; + else + wave_fmt->samplingrate = 0x1F40; + + switch (wave_fmt->id) { + case AFMT_S16_LE: + wave_fmt->bitsperchannel = 16; + break; + case AFMT_U8: + wave_fmt->bitsperchannel = 8; + break; + default: + wave_fmt->id = AFMT_S16_LE; + wave_fmt->bitsperchannel = 16; + break; + } + + break; + + /* these can't be changed from the original values */ + case WAVERECORD_MIC: + case WAVERECORD_FX: + break; + + default: + BUG(); + break; + } + + 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; + wave_fmt->bytespervoicesample = wave_fmt->bytespersample; +} + +static int alloc_buffer(struct emu10k1_card *card, struct wavein_buffer *buffer) +{ + buffer->addr = pci_alloc_consistent(card->pci_dev, buffer->size * buffer->cov, + &buffer->dma_handle); + if (buffer->addr == NULL) + return -1; + + return 0; +} + +static void free_buffer(struct emu10k1_card *card, struct wavein_buffer *buffer) +{ + if (buffer->addr != NULL) + pci_free_consistent(card->pci_dev, buffer->size * buffer->cov, + buffer->addr, buffer->dma_handle); +} + +int emu10k1_wavein_open(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct wiinst *wiinst = wave_dev->wiinst; + struct wiinst **wiinst_tmp = NULL; + u16 delay; + unsigned long flags; + + DPF(2, "emu10k1_wavein_open()\n"); + + switch (wiinst->recsrc) { + case WAVERECORD_AC97: + wiinst_tmp = &card->wavein.ac97; + break; + case WAVERECORD_MIC: + wiinst_tmp = &card->wavein.mic; + break; + case WAVERECORD_FX: + wiinst_tmp = &card->wavein.fx; + break; + default: + BUG(); + break; + } + + spin_lock_irqsave(&card->lock, flags); + if (*wiinst_tmp != NULL) { + spin_unlock_irqrestore(&card->lock, flags); + return -1; + } + + *wiinst_tmp = wiinst; + spin_unlock_irqrestore(&card->lock, flags); + + /* handle 8 bit recording */ + if (wiinst->format.bytesperchannel == 1) { + if (wiinst->buffer.size > 0x8000) { + wiinst->buffer.size = 0x8000; + wiinst->buffer.sizeregval = 0x1f; + } else + wiinst->buffer.sizeregval += 4; + + wiinst->buffer.cov = 2; + } else + wiinst->buffer.cov = 1; + + if (alloc_buffer(card, &wiinst->buffer) < 0) { + ERROR(); + return -1; + } + + emu10k1_set_record_src(card, wiinst); + + emu10k1_reset_record(card, &wiinst->buffer); + + wiinst->buffer.hw_pos = 0; + wiinst->buffer.pos = 0; + wiinst->buffer.bytestocopy = 0; + + delay = (48000 * wiinst->buffer.fragment_size) / wiinst->format.bytespersec; + + emu10k1_timer_install(card, &wiinst->timer, delay / 2); + + wiinst->state = WAVE_STATE_OPEN; + + return 0; +} + +void emu10k1_wavein_close(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct wiinst *wiinst = wave_dev->wiinst; + unsigned long flags; + + DPF(2, "emu10k1_wavein_close()\n"); + + emu10k1_wavein_stop(wave_dev); + + emu10k1_timer_uninstall(card, &wiinst->timer); + + free_buffer(card, &wiinst->buffer); + + spin_lock_irqsave(&card->lock, flags); + switch (wave_dev->wiinst->recsrc) { + case WAVERECORD_AC97: + card->wavein.ac97 = NULL; + break; + case WAVERECORD_MIC: + card->wavein.mic = NULL; + break; + case WAVERECORD_FX: + card->wavein.fx = NULL; + break; + default: + BUG(); + break; + } + spin_unlock_irqrestore(&card->lock, flags); + + wiinst->state = WAVE_STATE_CLOSED; +} + +void emu10k1_wavein_start(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct wiinst *wiinst = wave_dev->wiinst; + + DPF(2, "emu10k1_wavein_start()\n"); + + emu10k1_start_record(card, &wiinst->buffer); + emu10k1_timer_enable(wave_dev->card, &wiinst->timer); + + wiinst->state |= WAVE_STATE_STARTED; +} + +void emu10k1_wavein_stop(struct emu10k1_wavedevice *wave_dev) +{ + struct emu10k1_card *card = wave_dev->card; + struct wiinst *wiinst = wave_dev->wiinst; + + DPF(2, "emu10k1_wavein_stop()\n"); + + if (!(wiinst->state & WAVE_STATE_STARTED)) + return; + + emu10k1_timer_disable(card, &wiinst->timer); + emu10k1_stop_record(card, &wiinst->buffer); + + wiinst->state &= ~WAVE_STATE_STARTED; +} + +int emu10k1_wavein_setformat(struct emu10k1_wavedevice *wave_dev, struct wave_format *format) +{ + struct emu10k1_card *card = wave_dev->card; + struct wiinst *wiinst = wave_dev->wiinst; + u16 delay; + + DPF(2, "emu10k1_wavein_setformat()\n"); + + if (wiinst->state & WAVE_STATE_STARTED) + return -1; + + query_format(wiinst->recsrc, format); + + if ((wiinst->format.samplingrate != format->samplingrate) + || (wiinst->format.bitsperchannel != format->bitsperchannel) + || (wiinst->format.channels != format->channels)) { + + wiinst->format = *format; + + if (wiinst->state == WAVE_STATE_CLOSED) + return 0; + + wiinst->buffer.size *= wiinst->buffer.cov; + + if (wiinst->format.bytesperchannel == 1) { + wiinst->buffer.cov = 2; + wiinst->buffer.size /= wiinst->buffer.cov; + } else + wiinst->buffer.cov = 1; + + emu10k1_timer_uninstall(card, &wiinst->timer); + + delay = (48000 * wiinst->buffer.fragment_size) / wiinst->format.bytespersec; + + emu10k1_timer_install(card, &wiinst->timer, delay / 2); + } + + return 0; +} + +void emu10k1_wavein_getxfersize(struct wiinst *wiinst, u32 * size) +{ + struct wavein_buffer *buffer = &wiinst->buffer; + + *size = buffer->bytestocopy; + + if (wiinst->mmapped) + return; + + if (*size > buffer->size) { + *size = buffer->size; + buffer->pos = buffer->hw_pos; + buffer->bytestocopy = buffer->size; + DPF(1, "buffer overrun\n"); + } +} + +static void copy_block(u8 __user *dst, u8 * src, u32 str, u32 len, u8 cov) +{ + if (cov == 1) + __copy_to_user(dst, src + str, len); + else { + u8 byte; + u32 i; + + src += 1 + 2 * str; + + for (i = 0; i < len; i++) { + byte = src[2 * i] ^ 0x80; + __copy_to_user(dst + i, &byte, 1); + } + } +} + +void emu10k1_wavein_xferdata(struct wiinst *wiinst, u8 __user *data, u32 * size) +{ + struct wavein_buffer *buffer = &wiinst->buffer; + u32 sizetocopy, sizetocopy_now, start; + unsigned long flags; + + sizetocopy = min_t(u32, buffer->size, *size); + *size = sizetocopy; + + if (!sizetocopy) + return; + + spin_lock_irqsave(&wiinst->lock, flags); + start = buffer->pos; + buffer->pos += sizetocopy; + buffer->pos %= buffer->size; + buffer->bytestocopy -= sizetocopy; + sizetocopy_now = buffer->size - start; + + spin_unlock_irqrestore(&wiinst->lock, flags); + + if (sizetocopy > sizetocopy_now) { + sizetocopy -= sizetocopy_now; + + copy_block(data, buffer->addr, start, sizetocopy_now, buffer->cov); + copy_block(data + sizetocopy_now, buffer->addr, 0, sizetocopy, buffer->cov); + } else { + copy_block(data, buffer->addr, start, sizetocopy, buffer->cov); + } +} + +void emu10k1_wavein_update(struct emu10k1_card *card, struct wiinst *wiinst) +{ + u32 hw_pos; + u32 diff; + + /* There is no actual start yet */ + if (!(wiinst->state & WAVE_STATE_STARTED)) { + hw_pos = wiinst->buffer.hw_pos; + } else { + /* hw_pos in byte units */ + hw_pos = sblive_readptr(card, wiinst->buffer.idxreg, 0) / wiinst->buffer.cov; + } + + diff = (wiinst->buffer.size + hw_pos - wiinst->buffer.hw_pos) % wiinst->buffer.size; + wiinst->total_recorded += diff; + wiinst->buffer.bytestocopy += diff; + + wiinst->buffer.hw_pos = hw_pos; +} |