forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1265 lines
30 KiB
1265 lines
30 KiB
// 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 = 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");
|
|
|