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ubuntu-linux-kernel/drivers/media/pci/saa7134/saa7134-alsa.c

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/*
* SAA713x ALSA support for V4L
*
* 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.
*
*/
#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, int 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(%d pages) failed\n", nr_pages);
return -ENOMEM;
}
pr_debug("vmalloc is at addr 0x%08lx, size=%d\n",
(unsigned long)dma->vaddr,
nr_pages << PAGE_SHIFT);
memset(dma->vaddr, 0, nr_pages << PAGE_SHIFT);
dma->nr_pages = nr_pages;
dma->sglist = vzalloc(dma->nr_pages * sizeof(*dma->sglist));
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, PCI_DMA_FROMDEVICE);
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->sglen, PCI_DMA_FROMDEVICE);
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,
.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,
.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;
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(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;
strcpy(card->mixername, "SAA7134 Mixer");
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;
strcpy(card->driver, "SAA7134");
/* 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" */
strcpy(card->shortname, "SAA7134");
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 = NULL;
struct list_head *list;
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(list,&saa7134_devlist) {
dev = list_entry(list, struct saa7134_dev, 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 (dev == NULL)
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");
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