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Diffstat (limited to 'drivers/media/pci/saa7134/saa7134-alsa.c')
-rw-r--r--drivers/media/pci/saa7134/saa7134-alsa.c1263
1 files changed, 1263 insertions, 0 deletions
diff --git a/drivers/media/pci/saa7134/saa7134-alsa.c b/drivers/media/pci/saa7134/saa7134-alsa.c
new file mode 100644
index 000000000..d3cde05a6
--- /dev/null
+++ b/drivers/media/pci/saa7134/saa7134-alsa.c
@@ -0,0 +1,1263 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * SAA713x ALSA support for V4L
+ */
+
+#include "saa7134.h"
+#include "saa7134-reg.h"
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+#include <linux/wait.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 <linux/vmalloc.h>
+
+/*
+ * Configuration macros
+ */
+
+/* defaults */
+#define MIXER_ADDR_UNSELECTED -1
+#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)] = 1};
+
+module_param_array(index, int, NULL, 0444);
+module_param_array(enable, int, NULL, 0444);
+MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s).");
+MODULE_PARM_DESC(enable, "Enable (or not) the SAA7134 capture interface(s).");
+
+/*
+ * Main chip structure
+ */
+
+typedef struct snd_card_saa7134 {
+ struct snd_card *card;
+ spinlock_t mixer_lock;
+ int mixer_volume[MIXER_ADDR_LAST+1][2];
+ int capture_source_addr;
+ int capture_source[2];
+ struct snd_kcontrol *capture_ctl[MIXER_ADDR_LAST+1];
+ struct pci_dev *pci;
+ struct saa7134_dev *dev;
+
+ unsigned long iobase;
+ s16 irq;
+ u16 mute_was_on;
+
+ spinlock_t lock;
+} snd_card_saa7134_t;
+
+
+/*
+ * PCM structure
+ */
+
+typedef struct snd_card_saa7134_pcm {
+ struct saa7134_dev *dev;
+
+ spinlock_t lock;
+
+ struct snd_pcm_substream *substream;
+} snd_card_saa7134_pcm_t;
+
+static struct snd_card *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) {
+ pr_debug("irq: recording stopped\n");
+ goto done;
+ }
+ if (0 != (status & 0x0f000000))
+ pr_debug("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) {
+ pr_debug("irq: field oops [%s]\n",
+ (status & 0x10000000) ? "even" : "odd");
+ goto done;
+ }
+
+ if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) {
+ pr_debug("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_xrun(dev->dmasound.substream);
+ return;
+ }
+
+ /* next block addr */
+ next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks;
+ saa_writel(reg,next_blk * dev->dmasound.blksize);
+ pr_debug("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 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,
+ SAA7134_IRQ_REPORT_DONE_RA3);
+ saa7134_irq_alsa_done(dev, status);
+ } else {
+ goto out;
+ }
+ }
+
+ if (loop == 10) {
+ pr_debug("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(struct snd_pcm_substream * substream,
+ int cmd)
+{
+ struct snd_pcm_runtime *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;
+}
+
+static int saa7134_alsa_dma_init(struct saa7134_dev *dev,
+ unsigned long nr_pages)
+{
+ struct saa7134_dmasound *dma = &dev->dmasound;
+ struct page *pg;
+ int i;
+
+ dma->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
+ if (NULL == dma->vaddr) {
+ pr_debug("vmalloc_32(%lu pages) failed\n", nr_pages);
+ return -ENOMEM;
+ }
+
+ pr_debug("vmalloc is at addr %p, size=%lu\n",
+ dma->vaddr, nr_pages << PAGE_SHIFT);
+
+ memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
+ dma->nr_pages = nr_pages;
+
+ dma->sglist = vzalloc(array_size(sizeof(*dma->sglist), dma->nr_pages));
+ if (NULL == dma->sglist)
+ goto vzalloc_err;
+
+ sg_init_table(dma->sglist, dma->nr_pages);
+ for (i = 0; i < dma->nr_pages; i++) {
+ pg = vmalloc_to_page(dma->vaddr + i * PAGE_SIZE);
+ if (NULL == pg)
+ goto vmalloc_to_page_err;
+ sg_set_page(&dma->sglist[i], pg, PAGE_SIZE, 0);
+ }
+ return 0;
+
+vmalloc_to_page_err:
+ vfree(dma->sglist);
+ dma->sglist = NULL;
+vzalloc_err:
+ vfree(dma->vaddr);
+ dma->vaddr = NULL;
+ return -ENOMEM;
+}
+
+static int saa7134_alsa_dma_map(struct saa7134_dev *dev)
+{
+ struct saa7134_dmasound *dma = &dev->dmasound;
+
+ dma->sglen = dma_map_sg(&dev->pci->dev, dma->sglist,
+ dma->nr_pages, DMA_FROM_DEVICE);
+
+ if (0 == dma->sglen) {
+ pr_warn("%s: saa7134_alsa_map_sg failed\n", __func__);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static int saa7134_alsa_dma_unmap(struct saa7134_dev *dev)
+{
+ struct saa7134_dmasound *dma = &dev->dmasound;
+
+ if (!dma->sglen)
+ return 0;
+
+ dma_unmap_sg(&dev->pci->dev, dma->sglist, dma->nr_pages, DMA_FROM_DEVICE);
+ dma->sglen = 0;
+ return 0;
+}
+
+static int saa7134_alsa_dma_free(struct saa7134_dmasound *dma)
+{
+ vfree(dma->sglist);
+ dma->sglist = NULL;
+ vfree(dma->vaddr);
+ dma->vaddr = NULL;
+ return 0;
+}
+
+/*
+ * 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);
+
+ err = saa7134_alsa_dma_init(dev,
+ (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)
+{
+ BUG_ON(!dev->dmasound.blksize);
+
+ saa7134_alsa_dma_free(&dev->dmasound);
+
+ dev->dmasound.blocks = 0;
+ dev->dmasound.blksize = 0;
+ dev->dmasound.bufsize = 0;
+
+ return 0;
+}
+
+/*
+ * Setting the capture source and updating the ALSA controls
+ */
+static int snd_saa7134_capsrc_set(struct snd_kcontrol *kcontrol,
+ int left, int right, bool force_notify)
+{
+ snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
+ int change = 0, addr = kcontrol->private_value;
+ int active, old_addr;
+ u32 anabar, xbarin;
+ int analog_io, rate;
+ struct saa7134_dev *dev;
+
+ dev = chip->dev;
+
+ spin_lock_irq(&chip->mixer_lock);
+
+ active = left != 0 || right != 0;
+ old_addr = chip->capture_source_addr;
+
+ /* The active capture source cannot be deactivated */
+ if (active) {
+ change = old_addr != addr ||
+ chip->capture_source[0] != left ||
+ chip->capture_source[1] != right;
+
+ chip->capture_source[0] = left;
+ chip->capture_source[1] = right;
+ chip->capture_source_addr = addr;
+ 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;
+ }
+ }
+
+ if (change) {
+ if (force_notify)
+ snd_ctl_notify(chip->card,
+ SNDRV_CTL_EVENT_MASK_VALUE,
+ &chip->capture_ctl[addr]->id);
+
+ if (old_addr != MIXER_ADDR_UNSELECTED && old_addr != addr)
+ snd_ctl_notify(chip->card,
+ SNDRV_CTL_EVENT_MASK_VALUE,
+ &chip->capture_ctl[old_addr]->id);
+ }
+
+ return change;
+}
+
+/*
+ * 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(struct snd_pcm_substream * substream)
+{
+ struct snd_pcm_runtime *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;
+ }
+
+ pr_debug("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;
+
+ /* Setup and update the card/ALSA controls */
+ snd_saa7134_capsrc_set(saa7134->capture_ctl[dev->dmasound.input], 1, 1,
+ true);
+
+ 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(struct snd_pcm_substream * substream)
+{
+ struct snd_pcm_runtime *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
+ *
+ * Report only 32kHz for ALSA:
+ *
+ * - SAA7133/35 uses DDEP (DemDec Easy Programming mode), which works in 32kHz
+ * only
+ * - SAA7134 for TV mode uses DemDec mode (32kHz)
+ * - Radio works in 32kHz only
+ * - When recording 48kHz from Line1/Line2, switching of capture source to TV
+ * means
+ * switching to 32kHz without any frequency translation
+ */
+
+static const struct snd_pcm_hardware 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,
+ .rate_min = 32000,
+ .rate_max = 32000,
+ .channels_min = 1,
+ .channels_max = 2,
+ .buffer_bytes_max = (256*1024),
+ .period_bytes_min = 64,
+ .period_bytes_max = (256*1024),
+ .periods_min = 4,
+ .periods_max = 1024,
+};
+
+static void snd_card_saa7134_runtime_free(struct snd_pcm_runtime *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(struct snd_pcm_substream * substream,
+ struct snd_pcm_hw_params * 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);
+
+ if (period_size < 0x100 || period_size > 0x10000)
+ return -EINVAL;
+ if (periods < 4)
+ return -EINVAL;
+ if (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);
+ saa7134_alsa_dma_unmap(dev);
+ 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;
+ }
+
+ err = saa7134_alsa_dma_map(dev);
+ if (err) {
+ dsp_buffer_free(dev);
+ return err;
+ }
+ err = saa7134_pgtable_alloc(dev->pci, &dev->dmasound.pt);
+ if (err) {
+ saa7134_alsa_dma_unmap(dev);
+ dsp_buffer_free(dev);
+ return err;
+ }
+ err = saa7134_pgtable_build(dev->pci, &dev->dmasound.pt,
+ dev->dmasound.sglist, dev->dmasound.sglen, 0);
+ if (err) {
+ saa7134_pgtable_free(dev->pci, &dev->dmasound.pt);
+ saa7134_alsa_dma_unmap(dev);
+ 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.vaddr;
+ substream->runtime->dma_bytes = dev->dmasound.bufsize;
+ substream->runtime->dma_addr = 0;
+
+ return 0;
+
+}
+
+/*
+ * 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(struct snd_pcm_substream * 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);
+ saa7134_alsa_dma_unmap(dev);
+ 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(struct snd_pcm_substream * substream)
+{
+ snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
+ struct saa7134_dev *dev = saa7134->dev;
+
+ if (saa7134->mute_was_on) {
+ dev->ctl_mute = 1;
+ saa7134_tvaudio_setmute(dev);
+ }
+ 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(struct snd_pcm_substream * substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ snd_card_saa7134_pcm_t *pcm;
+ snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream);
+ struct saa7134_dev *dev;
+ int amux, err;
+
+ if (!saa7134) {
+ pr_err("BUG: saa7134 can't find device struct. Can't proceed with open\n");
+ return -ENODEV;
+ }
+ dev = saa7134->dev;
+ mutex_lock(&dev->dmasound.lock);
+
+ dev->dmasound.read_count = 0;
+ dev->dmasound.read_offset = 0;
+
+ amux = dev->input->amux;
+ if ((amux < 1) || (amux > 3))
+ amux = 1;
+ dev->dmasound.input = amux - 1;
+
+ mutex_unlock(&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 (dev->ctl_mute != 0) {
+ saa7134->mute_was_on = 1;
+ dev->ctl_mute = 0;
+ saa7134_tvaudio_setmute(dev);
+ }
+
+ err = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (err < 0)
+ return err;
+
+ err = snd_pcm_hw_constraint_step(runtime, 0,
+ SNDRV_PCM_HW_PARAM_PERIODS, 2);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+/*
+ * page callback (needed for mmap)
+ */
+
+static struct page *snd_card_saa7134_page(struct snd_pcm_substream *substream,
+ unsigned long offset)
+{
+ void *pageptr = substream->runtime->dma_area + offset;
+ return vmalloc_to_page(pageptr);
+}
+
+/*
+ * ALSA capture callbacks definition
+ */
+
+static const struct snd_pcm_ops snd_card_saa7134_capture_ops = {
+ .open = snd_card_saa7134_capture_open,
+ .close = snd_card_saa7134_capture_close,
+ .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,
+ .page = snd_card_saa7134_page,
+};
+
+/*
+ * 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)
+{
+ struct snd_pcm *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;
+ strscpy(pcm->name, "SAA7134 PCM", sizeof(pcm->name));
+ 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(struct snd_kcontrol * kcontrol,
+ struct snd_ctl_elem_info * 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(struct snd_kcontrol * kcontrol,
+ struct snd_ctl_elem_value * 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(struct snd_kcontrol * kcontrol,
+ struct snd_ctl_elem_value * ucontrol)
+{
+ snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
+ struct saa7134_dev *dev = chip->dev;
+
+ 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 = 0;
+ if (chip->mixer_volume[addr][0] != left) {
+ change = 1;
+ right = left;
+ }
+ if (chip->mixer_volume[addr][1] != right) {
+ change = 1;
+ left = right;
+ }
+ if (change) {
+ switch (dev->pci->device) {
+ case PCI_DEVICE_ID_PHILIPS_SAA7134:
+ switch (addr) {
+ case MIXER_ADDR_TVTUNER:
+ left = 20;
+ break;
+ case MIXER_ADDR_LINE1:
+ saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x10,
+ (left > 10) ? 0x00 : 0x10);
+ break;
+ case MIXER_ADDR_LINE2:
+ saa_andorb(SAA7134_ANALOG_IO_SELECT, 0x20,
+ (left > 10) ? 0x00 : 0x20);
+ break;
+ }
+ break;
+ case PCI_DEVICE_ID_PHILIPS_SAA7133:
+ case PCI_DEVICE_ID_PHILIPS_SAA7135:
+ switch (addr) {
+ case MIXER_ADDR_TVTUNER:
+ left = 20;
+ break;
+ case MIXER_ADDR_LINE1:
+ saa_andorb(0x0594, 0x10,
+ (left > 10) ? 0x00 : 0x10);
+ break;
+ case MIXER_ADDR_LINE2:
+ saa_andorb(0x0594, 0x20,
+ (left > 10) ? 0x00 : 0x20);
+ break;
+ }
+ break;
+ }
+ 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(struct snd_kcontrol * kcontrol,
+ struct snd_ctl_elem_info * 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(struct snd_kcontrol * kcontrol,
+ struct snd_ctl_elem_value * ucontrol)
+{
+ snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol);
+ int addr = kcontrol->private_value;
+
+ spin_lock_irq(&chip->mixer_lock);
+ if (chip->capture_source_addr == addr) {
+ ucontrol->value.integer.value[0] = chip->capture_source[0];
+ ucontrol->value.integer.value[1] = chip->capture_source[1];
+ } else {
+ ucontrol->value.integer.value[0] = 0;
+ ucontrol->value.integer.value[1] = 0;
+ }
+ spin_unlock_irq(&chip->mixer_lock);
+
+ return 0;
+}
+
+static int snd_saa7134_capsrc_put(struct snd_kcontrol * kcontrol,
+ struct snd_ctl_elem_value * ucontrol)
+{
+ int left, right;
+ left = ucontrol->value.integer.value[0] & 1;
+ right = ucontrol->value.integer.value[1] & 1;
+
+ return snd_saa7134_capsrc_set(kcontrol, left, right, false);
+}
+
+static struct snd_kcontrol_new snd_saa7134_volume_controls[] = {
+SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER),
+SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1),
+SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2),
+};
+
+static struct snd_kcontrol_new snd_saa7134_capture_controls[] = {
+SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER),
+SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1),
+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)
+{
+ struct snd_card *card = chip->card;
+ struct snd_kcontrol *kcontrol;
+ unsigned int idx;
+ int err, addr;
+
+ strscpy(card->mixername, "SAA7134 Mixer", sizeof(card->mixername));
+
+ for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_volume_controls); idx++) {
+ kcontrol = snd_ctl_new1(&snd_saa7134_volume_controls[idx],
+ chip);
+ err = snd_ctl_add(card, kcontrol);
+ if (err < 0)
+ return err;
+ }
+
+ for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_capture_controls); idx++) {
+ kcontrol = snd_ctl_new1(&snd_saa7134_capture_controls[idx],
+ chip);
+ addr = snd_saa7134_capture_controls[idx].private_value;
+ chip->capture_ctl[addr] = kcontrol;
+ err = snd_ctl_add(card, kcontrol);
+ if (err < 0)
+ return err;
+ }
+
+ chip->capture_source_addr = MIXER_ADDR_UNSELECTED;
+ return 0;
+}
+
+static void snd_saa7134_free(struct snd_card * card)
+{
+ snd_card_saa7134_t *chip = card->private_data;
+
+ if (chip->dev->dmasound.priv_data == NULL)
+ return;
+
+ if (chip->irq >= 0)
+ 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)
+{
+
+ struct snd_card *card;
+ snd_card_saa7134_t *chip;
+ int err;
+
+
+ if (devnum >= SNDRV_CARDS)
+ return -ENODEV;
+ if (!enable[devnum])
+ return -ENODEV;
+
+ err = snd_card_new(&dev->pci->dev, index[devnum], id[devnum],
+ THIS_MODULE, sizeof(snd_card_saa7134_t), &card);
+ if (err < 0)
+ return err;
+
+ strscpy(card->driver, "SAA7134", sizeof(card->driver));
+
+ /* Card "creation" */
+
+ card->private_free = snd_saa7134_free;
+ chip = 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,
+ IRQF_SHARED, dev->name,
+ (void*) &dev->dmasound);
+
+ if (err < 0) {
+ pr_err("%s: can't get IRQ %d for ALSA\n",
+ dev->name, dev->pci->irq);
+ goto __nodev;
+ }
+
+ chip->irq = dev->pci->irq;
+
+ mutex_init(&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;
+
+ /* End of "creation" */
+
+ strscpy(card->shortname, "SAA7134", sizeof(card->shortname));
+ sprintf(card->longname, "%s at 0x%lx irq %d",
+ chip->dev->name, chip->iobase, chip->irq);
+
+ pr_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)
+{
+ if (!snd_saa7134_cards[dev->nr])
+ return 1;
+
+ 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;
+
+ saa7134_dmasound_init = alsa_device_init;
+ saa7134_dmasound_exit = alsa_device_exit;
+
+ pr_info("saa7134 ALSA driver for DMA sound loaded\n");
+
+ list_for_each_entry(dev, &saa7134_devlist, devlist) {
+ if (dev->pci->device == PCI_DEVICE_ID_PHILIPS_SAA7130)
+ pr_info("%s/alsa: %s doesn't support digital audio\n",
+ dev->name, saa7134_boards[dev->board].name);
+ else
+ alsa_device_init(dev);
+ }
+
+ if (list_empty(&saa7134_devlist))
+ pr_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++) {
+ if (snd_saa7134_cards[idx])
+ snd_card_free(snd_saa7134_cards[idx]);
+ }
+
+ saa7134_dmasound_init = NULL;
+ saa7134_dmasound_exit = NULL;
+ pr_info("saa7134 ALSA driver for DMA sound unloaded\n");
+
+ return;
+}
+
+/* We initialize this late, to make sure the sound system is up and running */
+late_initcall(saa7134_alsa_init);
+module_exit(saa7134_alsa_exit);
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ricardo Cerqueira");