Pull release into acpica branch

1 files changed, 1029 insertions, 0 deletions

diff --git a/drivers/media/video/saa7134/saa7134-alsa.c b/drivers/media/video/saa7134/saa7134-alsa.c
new file mode 100644
index 000000000000..263c6e2e3e8e
--- /dev/null
+++ b/drivers/media/video/saa7134/saa7134-alsa.c
@@ -0,0 +1,1029 @@
+/*
+ *   SAA713x ALSA support for V4L
+ *
+ *
+ *   Caveats:
+ *        - Volume doesn't work (it's always at max)
+ *
+ *   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, version 2
+ *
+ *   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+ *
+ */
+
+#include <sound/driver.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/wait.h>
+#include <linux/moduleparam.h>
+#include <linux/module.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <linux/interrupt.h>
+
+#include "saa7134.h"
+#include "saa7134-reg.h"
+
+static unsigned int debug  = 0;
+module_param(debug, int, 0644);
+MODULE_PARM_DESC(debug,"enable debug messages [alsa]");
+
+/*
+ * Configuration macros
+ */
+
+/* defaults */
+#define MIXER_ADDR_TVTUNER	0
+#define MIXER_ADDR_LINE1	1
+#define MIXER_ADDR_LINE2	2
+#define MIXER_ADDR_LAST		2
+
+static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
+static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
+static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 0};
+
+module_param_array(index, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
+
+#define dprintk(fmt, arg...)    if (debug) \
+        printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ## arg)
+
+/*
+ * Main chip structure
+ */
+typedef struct snd_card_saa7134 {
+	snd_card_t *card;
+	spinlock_t mixer_lock;
+	int mixer_volume[MIXER_ADDR_LAST+1][2];
+	int capture_source[MIXER_ADDR_LAST+1][2];
+	struct pci_dev *pci;
+	struct saa7134_dev *dev;
+
+	unsigned long iobase;
+	int irq;
+
+	spinlock_t lock;
+} snd_card_saa7134_t;
+
+
+
+/*
+ * PCM structure
+ */
+
+typedef struct snd_card_saa7134_pcm {
+	struct saa7134_dev *dev;
+
+	spinlock_t lock;
+
+	snd_pcm_substream_t *substream;
+} snd_card_saa7134_pcm_t;
+
+static snd_card_t *snd_saa7134_cards[SNDRV_CARDS];
+
+
+/*
+ * saa7134 DMA audio stop
+ *
+ *   Called when the capture device is released or the buffer overflows
+ *
+ *   - Copied verbatim from saa7134-oss's dsp_dma_stop.
+ *
+ */
+
+static void saa7134_dma_stop(struct saa7134_dev *dev)
+{
+	dev->dmasound.dma_blk     = -1;
+	dev->dmasound.dma_running = 0;
+	saa7134_set_dmabits(dev);
+}
+
+/*
+ * saa7134 DMA audio start
+ *
+ *   Called when preparing the capture device for use
+ *
+ *   - Copied verbatim from saa7134-oss's dsp_dma_start.
+ *
+ */
+
+static void saa7134_dma_start(struct saa7134_dev *dev)
+{
+	dev->dmasound.dma_blk     = 0;
+	dev->dmasound.dma_running = 1;
+	saa7134_set_dmabits(dev);
+}
+
+/*
+ * saa7134 audio DMA IRQ handler
+ *
+ *   Called whenever we get an SAA7134_IRQ_REPORT_DONE_RA3 interrupt
+ *   Handles shifting between the 2 buffers, manages the read counters,
+ *  and notifies ALSA when periods elapse
+ *
+ *   - Mostly copied from saa7134-oss's saa7134_irq_oss_done.
+ *
+ */
+
+static void saa7134_irq_alsa_done(struct saa7134_dev *dev,
+				  unsigned long status)
+{
+	int next_blk, reg = 0;
+
+	spin_lock(&dev->slock);
+	if (UNSET == dev->dmasound.dma_blk) {
+		dprintk("irq: recording stopped\n");
+		goto done;
+	}
+	if (0 != (status & 0x0f000000))
+		dprintk("irq: lost %ld\n", (status >> 24) & 0x0f);
+	if (0 == (status & 0x10000000)) {
+		/* odd */
+		if (0 == (dev->dmasound.dma_blk & 0x01))
+			reg = SAA7134_RS_BA1(6);
+	} else {
+		/* even */
+		if (1 == (dev->dmasound.dma_blk & 0x01))
+			reg = SAA7134_RS_BA2(6);
+	}
+	if (0 == reg) {
+		dprintk("irq: field oops [%s]\n",
+			(status & 0x10000000) ? "even" : "odd");
+		goto done;
+	}
+
+	if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
+		dprintk("irq: overrun [full=%d/%d] - Blocks in %d\n",dev->dmasound.read_count,
+			dev->dmasound.bufsize, dev->dmasound.blocks);
+		spin_unlock(&dev->slock);
+		snd_pcm_stop(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN);
+		return;
+	}
+
+	/* next block addr */
+	next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
+	saa_writel(reg,next_blk * dev->dmasound.blksize);
+	if (debug > 2)
+		dprintk("irq: ok, %s, next_blk=%d, addr=%x, blocks=%u, size=%u, read=%u\n",
+			(status & 0x10000000) ? "even" : "odd ", next_blk,
+			next_blk * dev->dmasound.blksize, dev->dmasound.blocks, dev->dmasound.blksize, dev->dmasound.read_count);
+
+	/* update status & wake waiting readers */
+	dev->dmasound.dma_blk = (dev->dmasound.dma_blk + 1) % dev->dmasound.blocks;
+	dev->dmasound.read_count += dev->dmasound.blksize;
+
+	dev->dmasound.recording_on = reg;
+
+	if (dev->dmasound.read_count >= snd_pcm_lib_period_bytes(dev->dmasound.substream)) {
+		spin_unlock(&dev->slock);
+		snd_pcm_period_elapsed(dev->dmasound.substream);
+		spin_lock(&dev->slock);
+	}
+
+ done:
+	spin_unlock(&dev->slock);
+
+}
+
+/*
+ * IRQ request handler
+ *
+ *   Runs along with saa7134's IRQ handler, discards anything that isn't
+ *   DMA sound
+ *
+ */
+
+static irqreturn_t saa7134_alsa_irq(int irq, void *dev_id, struct pt_regs *regs)
+{
+        struct saa7134_dmasound *dmasound = dev_id;
+        struct saa7134_dev *dev = dmasound->priv_data;
+
+	unsigned long report, status;
+	int loop, handled = 0;
+
+	for (loop = 0; loop < 10; loop++) {
+		report = saa_readl(SAA7134_IRQ_REPORT);
+		status = saa_readl(SAA7134_IRQ_STATUS);
+
+		if (report & SAA7134_IRQ_REPORT_DONE_RA3) {
+			handled = 1;
+			saa_writel(SAA7134_IRQ_REPORT,report);
+			saa7134_irq_alsa_done(dev, status);
+		} else {
+			goto out;
+		}
+	}
+
+	if (loop == 10) {
+		dprintk("error! looping IRQ!");
+	}
+
+out:
+	return IRQ_RETVAL(handled);
+}
+
+/*
+ * ALSA capture trigger
+ *
+ *   - One of the ALSA capture callbacks.
+ *
+ *   Called whenever a capture is started or stopped. Must be defined,
+ *   but there's nothing we want to do here
+ *
+ */
+
+static int snd_card_saa7134_capture_trigger(snd_pcm_substream_t * substream,
+					  int cmd)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_card_saa7134_pcm_t *pcm = runtime->private_data;
+	struct saa7134_dev *dev=pcm->dev;
+	int err = 0;
+
+	spin_lock(&dev->slock);
+	if (cmd == SNDRV_PCM_TRIGGER_START) {
+		/* start dma */
+		saa7134_dma_start(dev);
+	} else if (cmd == SNDRV_PCM_TRIGGER_STOP) {
+		/* stop dma */
+		saa7134_dma_stop(dev);
+	} else {
+		err = -EINVAL;
+	}
+	spin_unlock(&dev->slock);
+
+	return err;
+}
+
+/*
+ * DMA buffer initialization
+ *
+ *   Uses V4L functions to initialize the DMA. Shouldn't be necessary in
+ *  ALSA, but I was unable to use ALSA's own DMA, and had to force the
+ *  usage of V4L's
+ *
+ *   - Copied verbatim from saa7134-oss.
+ *
+ */
+
+static int dsp_buffer_init(struct saa7134_dev *dev)
+{
+	int err;
+
+	BUG_ON(!dev->dmasound.bufsize);
+
+	videobuf_dma_init(&dev->dmasound.dma);
+	err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE,
+				       (dev->dmasound.bufsize + PAGE_SIZE) >> PAGE_SHIFT);
+	if (0 != err)
+		return err;
+	return 0;
+}
+
+/*
+ * DMA buffer release
+ *
+ *   Called after closing the device, during snd_card_saa7134_capture_close
+ *
+ */
+
+static int dsp_buffer_free(struct saa7134_dev *dev)
+{
+	if (!dev->dmasound.blksize)
+		BUG();
+
+	videobuf_dma_free(&dev->dmasound.dma);
+
+	dev->dmasound.blocks  = 0;
+	dev->dmasound.blksize = 0;
+	dev->dmasound.bufsize = 0;
+
+       return 0;
+}
+
+
+/*
+ * ALSA PCM preparation
+ *
+ *   - One of the ALSA capture callbacks.
+ *
+ *   Called right after the capture device is opened, this function configures
+ *  the buffer using the previously defined functions, allocates the memory,
+ *  sets up the hardware registers, and then starts the DMA. When this function
+ *  returns, the audio should be flowing.
+ *
+ */
+
+static int snd_card_saa7134_capture_prepare(snd_pcm_substream_t * substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	int bswap, sign;
+	u32 fmt, control;
+	snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
+	struct saa7134_dev *dev;
+	snd_card_saa7134_pcm_t *pcm = runtime->private_data;
+
+	pcm->dev->dmasound.substream = substream;
+
+	dev = saa7134->dev;
+
+	if (snd_pcm_format_width(runtime->format) == 8)
+		fmt = 0x00;
+	else
+		fmt = 0x01;
+
+	if (snd_pcm_format_signed(runtime->format))
+		sign = 1;
+	else
+		sign = 0;
+
+	if (snd_pcm_format_big_endian(runtime->format))
+		bswap = 1;
+	else
+		bswap = 0;
+
+	switch (dev->pci->device) {
+	  case PCI_DEVICE_ID_PHILIPS_SAA7134:
+		if (1 == runtime->channels)
+			fmt |= (1 << 3);
+		if (2 == runtime->channels)
+			fmt |= (3 << 3);
+		if (sign)
+			fmt |= 0x04;
+
+		fmt |= (MIXER_ADDR_TVTUNER == dev->dmasound.input) ? 0xc0 : 0x80;
+		saa_writeb(SAA7134_NUM_SAMPLES0, ((dev->dmasound.blksize - 1) & 0x0000ff));
+		saa_writeb(SAA7134_NUM_SAMPLES1, ((dev->dmasound.blksize - 1) & 0x00ff00) >>  8);
+		saa_writeb(SAA7134_NUM_SAMPLES2, ((dev->dmasound.blksize - 1) & 0xff0000) >> 16);
+		saa_writeb(SAA7134_AUDIO_FORMAT_CTRL, fmt);
+
+		break;
+	  case PCI_DEVICE_ID_PHILIPS_SAA7133:
+	  case PCI_DEVICE_ID_PHILIPS_SAA7135:
+		if (1 == runtime->channels)
+			fmt |= (1 << 4);
+		if (2 == runtime->channels)
+			fmt |= (2 << 4);
+		if (!sign)
+			fmt |= 0x04;
+		saa_writel(SAA7133_NUM_SAMPLES, dev->dmasound.blksize -1);
+		saa_writel(SAA7133_AUDIO_CHANNEL, 0x543210 | (fmt << 24));
+		break;
+	}
+
+	dprintk("rec_start: afmt=%d ch=%d  =>  fmt=0x%x swap=%c\n",
+		runtime->format, runtime->channels, fmt,
+		bswap ? 'b' : '-');
+	/* dma: setup channel 6 (= AUDIO) */
+	control = SAA7134_RS_CONTROL_BURST_16 |
+		SAA7134_RS_CONTROL_ME |
+		(dev->dmasound.pt.dma >> 12);
+	if (bswap)
+		control |= SAA7134_RS_CONTROL_BSWAP;
+
+	saa_writel(SAA7134_RS_BA1(6),0);
+	saa_writel(SAA7134_RS_BA2(6),dev->dmasound.blksize);
+	saa_writel(SAA7134_RS_PITCH(6),0);
+	saa_writel(SAA7134_RS_CONTROL(6),control);
+
+	dev->dmasound.rate = runtime->rate;
+
+	return 0;
+
+}
+
+/*
+ * ALSA pointer fetching
+ *
+ *   - One of the ALSA capture callbacks.
+ *
+ *   Called whenever a period elapses, it must return the current hardware
+ *  position of the buffer.
+ *   Also resets the read counter used to prevent overruns
+ *
+ */
+
+static snd_pcm_uframes_t snd_card_saa7134_capture_pointer(snd_pcm_substream_t * substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_card_saa7134_pcm_t *pcm = runtime->private_data;
+	struct saa7134_dev *dev=pcm->dev;
+
+	if (dev->dmasound.read_count) {
+		dev->dmasound.read_count  -= snd_pcm_lib_period_bytes(substream);
+		dev->dmasound.read_offset += snd_pcm_lib_period_bytes(substream);
+		if (dev->dmasound.read_offset == dev->dmasound.bufsize)
+			dev->dmasound.read_offset = 0;
+	}
+
+	return bytes_to_frames(runtime, dev->dmasound.read_offset);
+}
+
+/*
+ * ALSA hardware capabilities definition
+ */
+
+static snd_pcm_hardware_t snd_card_saa7134_capture =
+{
+	.info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
+				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
+				 SNDRV_PCM_INFO_MMAP_VALID),
+	.formats =		SNDRV_PCM_FMTBIT_S16_LE | \
+				SNDRV_PCM_FMTBIT_S16_BE | \
+				SNDRV_PCM_FMTBIT_S8 | \
+				SNDRV_PCM_FMTBIT_U8 | \
+				SNDRV_PCM_FMTBIT_U16_LE | \
+				SNDRV_PCM_FMTBIT_U16_BE,
+	.rates =		SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_48000,
+	.rate_min =		32000,
+	.rate_max =		48000,
+	.channels_min =		1,
+	.channels_max =		2,
+	.buffer_bytes_max =	(256*1024),
+	.period_bytes_min =	64,
+	.period_bytes_max =	(256*1024),
+	.periods_min =		2,
+	.periods_max =		1024,
+};
+
+static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *runtime)
+{
+	snd_card_saa7134_pcm_t *pcm = runtime->private_data;
+
+	kfree(pcm);
+}
+
+
+/*
+ * ALSA hardware params
+ *
+ *   - One of the ALSA capture callbacks.
+ *
+ *   Called on initialization, right before the PCM preparation
+ *
+ */
+
+static int snd_card_saa7134_hw_params(snd_pcm_substream_t * substream,
+				    snd_pcm_hw_params_t * hw_params)
+{
+	snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
+	struct saa7134_dev *dev;
+	unsigned int period_size, periods;
+	int err;
+
+	period_size = params_period_bytes(hw_params);
+	periods = params_periods(hw_params);
+
+	snd_assert(period_size >= 0x100 && period_size <= 0x10000,
+		   return -EINVAL);
+	snd_assert(periods >= 2, return -EINVAL);
+	snd_assert(period_size * periods <= 1024 * 1024, return -EINVAL);
+
+	dev = saa7134->dev;
+
+	if (dev->dmasound.blocks == periods &&
+	    dev->dmasound.blksize == period_size)
+		return 0;
+
+	/* release the old buffer */
+	if (substream->runtime->dma_area) {
+		saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
+		videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
+		dsp_buffer_free(dev);
+		substream->runtime->dma_area = NULL;
+	}
+	dev->dmasound.blocks  = periods;
+	dev->dmasound.blksize = period_size;
+	dev->dmasound.bufsize = period_size * periods;
+
+	err = dsp_buffer_init(dev);
+	if (0 != err) {
+		dev->dmasound.blocks  = 0;
+		dev->dmasound.blksize = 0;
+		dev->dmasound.bufsize = 0;
+		return err;
+	}
+
+	if (0 != (err = videobuf_dma_pci_map(dev->pci, &dev->dmasound.dma))) {
+		dsp_buffer_free(dev);
+		return err;
+	}
+	if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) {
+		videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
+		dsp_buffer_free(dev);
+		return err;
+	}
+	if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt,
+						dev->dmasound.dma.sglist,
+						dev->dmasound.dma.sglen,
+						0))) {
+		saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
+		videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
+		dsp_buffer_free(dev);
+		return err;
+	}
+
+	/* I should be able to use runtime->dma_addr in the control
+	   byte, but it doesn't work. So I allocate the DMA using the
+	   V4L functions, and force ALSA to use that as the DMA area */
+
+	substream->runtime->dma_area = dev->dmasound.dma.vmalloc;
+
+	return 1;
+
+}
+
+/*
+ * ALSA hardware release
+ *
+ *   - One of the ALSA capture callbacks.
+ *
+ *   Called after closing the device, but before snd_card_saa7134_capture_close
+ *   It stops the DMA audio and releases the buffers.
+ *
+ */
+
+static int snd_card_saa7134_hw_free(snd_pcm_substream_t * substream)
+{
+	snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
+	struct saa7134_dev *dev;
+
+	dev = saa7134->dev;
+
+	if (substream->runtime->dma_area) {
+		saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
+		videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma);
+		dsp_buffer_free(dev);
+		substream->runtime->dma_area = NULL;
+	}
+
+	return 0;
+}
+
+/*
+ * ALSA capture finish
+ *
+ *   - One of the ALSA capture callbacks.
+ *
+ *   Called after closing the device.
+ *
+ */
+
+static int snd_card_saa7134_capture_close(snd_pcm_substream_t * substream)
+{
+	return 0;
+}
+
+/*
+ * ALSA capture start
+ *
+ *   - One of the ALSA capture callbacks.
+ *
+ *   Called when opening the device. It creates and populates the PCM
+ *  structure
+ *
+ */
+
+static int snd_card_saa7134_capture_open(snd_pcm_substream_t * substream)
+{
+	snd_pcm_runtime_t *runtime = substream->runtime;
+	snd_card_saa7134_pcm_t *pcm;
+	snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
+	struct saa7134_dev *dev = saa7134->dev;
+	int err;
+
+	down(&dev->dmasound.lock);
+
+	dev->dmasound.read_count  = 0;
+	dev->dmasound.read_offset = 0;
+
+	up(&dev->dmasound.lock);
+
+	pcm = kzalloc(sizeof(*pcm), GFP_KERNEL);
+	if (pcm == NULL)
+		return -ENOMEM;
+
+	pcm->dev=saa7134->dev;
+
+	spin_lock_init(&pcm->lock);
+
+	pcm->substream = substream;
+	runtime->private_data = pcm;
+	runtime->private_free = snd_card_saa7134_runtime_free;
+	runtime->hw = snd_card_saa7134_capture;
+
+	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
+		return err;
+
+	return 0;
+}
+
+/*
+ * ALSA capture callbacks definition
+ */
+
+static snd_pcm_ops_t snd_card_saa7134_capture_ops = {
+	.open =			snd_card_saa7134_capture_open,
+	.close =		snd_card_saa7134_capture_close,
+	.ioctl =		snd_pcm_lib_ioctl,
+	.hw_params =		snd_card_saa7134_hw_params,
+	.hw_free =		snd_card_saa7134_hw_free,
+	.prepare =		snd_card_saa7134_capture_prepare,
+	.trigger =		snd_card_saa7134_capture_trigger,
+	.pointer =		snd_card_saa7134_capture_pointer,
+};
+
+/*
+ * ALSA PCM setup
+ *
+ *   Called when initializing the board. Sets up the name and hooks up
+ *  the callbacks
+ *
+ */
+
+static int snd_card_saa7134_pcm(snd_card_saa7134_t *saa7134, int device)
+{
+	snd_pcm_t *pcm;
+	int err;
+
+	if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0)
+		return err;
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops);
+	pcm->private_data = saa7134;
+	pcm->info_flags = 0;
+	strcpy(pcm->name, "SAA7134 PCM");
+	return 0;
+}
+
+#define SAA713x_VOLUME(xname, xindex, addr) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
+  .info = snd_saa7134_volume_info, \
+  .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \
+  .private_value = addr }
+
+static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 20;
+	return 0;
+}
+
+static int snd_saa7134_volume_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
+	int addr = kcontrol->private_value;
+
+	ucontrol->value.integer.value[0] = chip->mixer_volume[addr][0];
+	ucontrol->value.integer.value[1] = chip->mixer_volume[addr][1];
+	return 0;
+}
+
+static int snd_saa7134_volume_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
+	int change, addr = kcontrol->private_value;
+	int left, right;
+
+	left = ucontrol->value.integer.value[0];
+	if (left < 0)
+		left = 0;
+	if (left > 20)
+		left = 20;
+	right = ucontrol->value.integer.value[1];
+	if (right < 0)
+		right = 0;
+	if (right > 20)
+		right = 20;
+	spin_lock_irq(&chip->mixer_lock);
+	change = chip->mixer_volume[addr][0] != left ||
+		 chip->mixer_volume[addr][1] != right;
+	chip->mixer_volume[addr][0] = left;
+	chip->mixer_volume[addr][1] = right;
+	spin_unlock_irq(&chip->mixer_lock);
+	return change;
+}
+
+#define SAA713x_CAPSRC(xname, xindex, addr) \
+{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \
+  .info = snd_saa7134_capsrc_info, \
+  .get = snd_saa7134_capsrc_get, .put = snd_saa7134_capsrc_put, \
+  .private_value = addr }
+
+static int snd_saa7134_capsrc_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = 1;
+	return 0;
+}
+
+static int snd_saa7134_capsrc_get(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
+	int addr = kcontrol->private_value;
+
+	spin_lock_irq(&chip->mixer_lock);
+	ucontrol->value.integer.value[0] = chip->capture_source[addr][0];
+	ucontrol->value.integer.value[1] = chip->capture_source[addr][1];
+	spin_unlock_irq(&chip->mixer_lock);
+
+	return 0;
+}
+
+static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol)
+{
+	snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
+	int change, addr = kcontrol->private_value;
+	int left, right;
+	u32 anabar, xbarin;
+	int analog_io, rate;
+	struct saa7134_dev *dev;
+
+	dev = chip->dev;
+
+	left = ucontrol->value.integer.value[0] & 1;
+	right = ucontrol->value.integer.value[1] & 1;
+	spin_lock_irq(&chip->mixer_lock);
+
+	change = chip->capture_source[addr][0] != left ||
+		 chip->capture_source[addr][1] != right;
+	chip->capture_source[addr][0] = left;
+	chip->capture_source[addr][1] = right;
+	dev->dmasound.input=addr;
+	spin_unlock_irq(&chip->mixer_lock);
+
+
+	if (change) {
+	  switch (dev->pci->device) {
+
+	   case PCI_DEVICE_ID_PHILIPS_SAA7134:
+		switch (addr) {
+			case MIXER_ADDR_TVTUNER:
+				saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0xc0);
+				saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, 0x00);
+				break;
+			case MIXER_ADDR_LINE1:
+			case MIXER_ADDR_LINE2:
+				analog_io = (MIXER_ADDR_LINE1 == addr) ? 0x00 : 0x08;
+				rate = (32000 == dev->dmasound.rate) ? 0x01 : 0x03;
+				saa_andorb(SAA7134_ANALOG_IO_SELECT,  0x08, analog_io);
+				saa_andorb(SAA7134_AUDIO_FORMAT_CTRL, 0xc0, 0x80);
+				saa_andorb(SAA7134_SIF_SAMPLE_FREQ,   0x03, rate);
+				break;
+		}
+
+		break;
+	   case PCI_DEVICE_ID_PHILIPS_SAA7133:
+	   case PCI_DEVICE_ID_PHILIPS_SAA7135:
+		xbarin = 0x03; // adc
+		anabar = 0;
+		switch (addr) {
+			case MIXER_ADDR_TVTUNER:
+				xbarin = 0; // Demodulator
+				anabar = 2; // DACs
+				break;
+			case MIXER_ADDR_LINE1:
+				anabar = 0;  // aux1, aux1
+				break;
+			case MIXER_ADDR_LINE2:
+				anabar = 9;  // aux2, aux2
+				break;
+		}
+
+	    	/* output xbar always main channel */
+		saa_dsp_writel(dev, SAA7133_DIGITAL_OUTPUT_SEL1, 0xbbbb10);
+
+		if (left || right) { // We've got data, turn the input on
+		  saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, xbarin);
+		  saa_writel(SAA7133_ANALOG_IO_SELECT, anabar);
+		} else {
+		  saa_dsp_writel(dev, SAA7133_DIGITAL_INPUT_XBAR1, 0);
+		  saa_writel(SAA7133_ANALOG_IO_SELECT, 0);
+		}
+		break;
+	  }
+	}
+
+	return change;
+}
+
+static snd_kcontrol_new_t snd_saa7134_controls[] = {
+SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
+SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
+SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
+SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
+SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
+SAA713x_CAPSRC("Line Capture Switch", 2, MIXER_ADDR_LINE2),
+};
+
+/*
+ * ALSA mixer setup
+ *
+ *   Called when initializing the board. Sets up the name and hooks up
+ *  the callbacks
+ *
+ */
+
+static int snd_card_saa7134_new_mixer(snd_card_saa7134_t * chip)
+{
+	snd_card_t *card = chip->card;
+	unsigned int idx;
+	int err;
+
+	snd_assert(chip != NULL, return -EINVAL);
+	strcpy(card->mixername, "SAA7134 Mixer");
+
+	for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) {
+		if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0)
+			return err;
+	}
+	return 0;
+}
+
+static void snd_saa7134_free(snd_card_t * card)
+{
+	snd_card_saa7134_t *chip = card->private_data;
+
+	if (chip->dev->dmasound.priv_data == NULL)
+		return;
+
+	if (chip->irq >= 0) {
+		synchronize_irq(chip->irq);
+		free_irq(chip->irq, &chip->dev->dmasound);
+	}
+
+	chip->dev->dmasound.priv_data = NULL;
+
+}
+
+/*
+ * ALSA initialization
+ *
+ *   Called by the init routine, once for each saa7134 device present,
+ *  it creates the basic structures and registers the ALSA devices
+ *
+ */
+
+static int alsa_card_saa7134_create(struct saa7134_dev *dev, int devnum)
+{
+
+	snd_card_t *card;
+	snd_card_saa7134_t *chip;
+	int err;
+
+
+	if (devnum >= SNDRV_CARDS)
+		return -ENODEV;
+	if (!enable[devnum])
+		return -ENODEV;
+
+	card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t));
+
+	if (card == NULL)
+		return -ENOMEM;
+
+	strcpy(card->driver, "SAA7134");
+
+	/* Card "creation" */
+
+	card->private_free = snd_saa7134_free;
+	chip = (snd_card_saa7134_t *) card->private_data;
+
+	spin_lock_init(&chip->lock);
+	spin_lock_init(&chip->mixer_lock);
+
+	chip->dev = dev;
+
+	chip->card = card;
+
+	chip->pci = dev->pci;
+	chip->iobase = pci_resource_start(dev->pci, 0);
+
+
+	err = request_irq(dev->pci->irq, saa7134_alsa_irq,
+				SA_SHIRQ | SA_INTERRUPT, dev->name,
+				(void*) &dev->dmasound);
+
+	if (err < 0) {
+		printk(KERN_ERR "%s: can't get IRQ %d for ALSA\n",
+			dev->name, dev->pci->irq);
+		goto __nodev;
+	}
+
+	chip->irq = dev->pci->irq;
+
+	init_MUTEX(&dev->dmasound.lock);
+
+	if ((err = snd_card_saa7134_new_mixer(chip)) < 0)
+		goto __nodev;
+
+	if ((err = snd_card_saa7134_pcm(chip, 0)) < 0)
+		goto __nodev;
+
+	snd_card_set_dev(card, &chip->pci->dev);
+
+	/* End of "creation" */
+
+	strcpy(card->shortname, "SAA7134");
+	sprintf(card->longname, "%s at 0x%lx irq %d",
+		chip->dev->name, chip->iobase, chip->irq);
+
+	printk(KERN_INFO "%s/alsa: %s registered as card %d\n",dev->name,card->longname,index[devnum]);
+
+	if ((err = snd_card_register(card)) == 0) {
+		snd_saa7134_cards[devnum] = card;
+		return 0;
+	}
+
+__nodev:
+	snd_card_free(card);
+	return err;
+}
+
+
+static int alsa_device_init(struct saa7134_dev *dev)
+{
+	dev->dmasound.priv_data = dev;
+	alsa_card_saa7134_create(dev,dev->nr);
+	return 1;
+}
+
+static int alsa_device_exit(struct saa7134_dev *dev)
+{
+
+	snd_card_free(snd_saa7134_cards[dev->nr]);
+	snd_saa7134_cards[dev->nr] = NULL;
+	return 1;
+}
+
+/*
+ * Module initializer
+ *
+ * Loops through present saa7134 cards, and assigns an ALSA device
+ * to each one
+ *
+ */
+
+static int saa7134_alsa_init(void)
+{
+	struct saa7134_dev *dev = NULL;
+	struct list_head *list;
+
+        printk(KERN_INFO "saa7134 ALSA driver for DMA sound loaded\n");
+
+	list_for_each(list,&saa7134_devlist) {
+		dev = list_entry(list, struct saa7134_dev, devlist);
+		if (dev->dmasound.priv_data == NULL) {
+			alsa_device_init(dev);
+		} else {
+			printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name);
+			return -EBUSY;
+		}
+	}
+
+	dmasound_init = alsa_device_init;
+	dmasound_exit = alsa_device_exit;
+
+	if (dev == NULL)
+		printk(KERN_INFO "saa7134 ALSA: no saa7134 cards found\n");
+
+	return 0;
+}
+
+/*
+ * Module destructor
+ */
+
+static void saa7134_alsa_exit(void)
+{
+	int idx;
+
+	for (idx = 0; idx < SNDRV_CARDS; idx++) {
+		snd_card_free(snd_saa7134_cards[idx]);
+	}
+
+	printk(KERN_INFO "saa7134 ALSA driver for DMA sound unloaded\n");
+
+	return;
+}
+
+module_init(saa7134_alsa_init);
+module_exit(saa7134_alsa_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ricardo Cerqueira");