diff options
Diffstat (limited to 'drivers/media/pci/saa7134/saa7134-alsa.c')
| -rw-r--r-- | drivers/media/pci/saa7134/saa7134-alsa.c | 1263 |
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"); |