// SPDX-License-Identifier: GPL-2.0-only /* * SAA713x ALSA support for V4L */ #include "saa7134.h" #include "saa7134-reg.h" #include #include #include #include #include #include #include #include #include #include #include #include /* * 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; 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 (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");