patch-2.2.17 linux/drivers/sound/emu10k1/cardwi.c

• Lines: 379
• Date: Mon Sep 4 18:39:21 2000
• Orig file: v2.2.16/drivers/sound/emu10k1/cardwi.c
• Orig date: Thu Jan 1 01:00:00 1970

diff -u --recursive --new-file v2.2.16/drivers/sound/emu10k1/cardwi.c linux/drivers/sound/emu10k1/cardwi.c
@@ -0,0 +1,378 @@
+/*
+ **********************************************************************
+ *     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"
+
+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;
+
+		if ((wave_fmt->bitsperchannel != 8) && (wave_fmt->bitsperchannel != 16))
+			wave_fmt->bitsperchannel = 16;
+
+		break;
+
+	case WAVERECORD_MIC:
+		wave_fmt->channels = 1;
+		wave_fmt->samplingrate = 0x1F40;
+		wave_fmt->bitsperchannel = 16;
+		break;
+
+	case WAVERECORD_FX:
+		if (wave_fmt->channels > 16)
+			wave_fmt->channels = 16;
+		else if (wave_fmt->channels < 1)
+			wave_fmt->channels = 1;
+
+		wave_fmt->samplingrate = 0xBB80;
+		wave_fmt->bitsperchannel = 16;
+		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;
+
+	return;
+}
+
+static int alloc_buffer(struct emu10k1_card *card, struct wavein_buffer *buffer)
+{
+	if ((buffer->addr = pci_alloc_consistent(card->pci_dev, buffer->size * buffer->cov, &buffer->dma_handle)) == 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);
+
+	return;
+}
+
+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;
+	u32 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();
+		emu10k1_wavein_close(wave_dev);
+		return -1;
+	}
+
+	emu10k1_set_record_src(card, wiinst);
+
+	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;
+
+	return;
+}
+
+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->buffer.hw_pos = 0;
+	wiinst->buffer.pos = 0;
+	wiinst->buffer.bytestocopy = 0;
+
+	wiinst->state |= WAVE_STATE_STARTED;
+
+	return;
+}
+
+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;
+
+	return;
+}
+
+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;
+	u32 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 (*size > buffer->size) {
+		*size = buffer->size;
+		buffer->pos = buffer->hw_pos;
+		buffer->bytestocopy = buffer->size;
+		DPF(1, "buffer overrun\n");
+	}
+
+	return;
+}
+
+static void copy_block(u8 *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);
+		}
+	}
+
+	return;
+}
+
+void emu10k1_wavein_xferdata(struct wiinst *wiinst, u8 * data, u32 * size)
+{
+	struct wavein_buffer *buffer = &wiinst->buffer;
+	u32 sizetocopy, sizetocopy_now, start;
+	unsigned long flags;
+
+	sizetocopy = min(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);
+	}
+
+	return;
+}
+
+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;
+
+	return;
+}