/* * SAA713x ALSA support for V4L * * * Caveats: * - Volume doesn't work (it's always at max) * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, version 2 * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include "saa7134.h" #include "saa7134-reg.h" static unsigned int debug = 0; module_param(debug, int, 0644); MODULE_PARM_DESC(debug,"enable debug messages [alsa]"); /* * Configuration macros */ /* defaults */ #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)] = 0}; module_param_array(index, int, NULL, 0444); MODULE_PARM_DESC(index, "Index value for SAA7134 capture interface(s)."); #define dprintk(fmt, arg...) if (debug) \ printk(KERN_DEBUG "%s/alsa: " fmt, dev->name , ##arg) /* * Main chip structure */ typedef struct snd_card_saa7134 { snd_card_t *card; spinlock_t mixer_lock; int mixer_volume[MIXER_ADDR_LAST+1][2]; int capture_source[MIXER_ADDR_LAST+1][2]; struct pci_dev *pci; struct saa7134_dev *dev; unsigned long iobase; int irq; spinlock_t lock; } snd_card_saa7134_t; /* * PCM structure */ typedef struct snd_card_saa7134_pcm { struct saa7134_dev *dev; spinlock_t lock; snd_pcm_substream_t *substream; } snd_card_saa7134_pcm_t; static snd_card_t *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) { dprintk("irq: recording stopped\n"); goto done; } if (0 != (status & 0x0f000000)) dprintk("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) { dprintk("irq: field oops [%s]\n", (status & 0x10000000) ? "even" : "odd"); goto done; } if (dev->dmasound.read_count >= dev->dmasound.blksize * (dev->dmasound.blocks-2)) { dprintk("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(dev->dmasound.substream,SNDRV_PCM_STATE_XRUN); return; } /* next block addr */ next_blk = (dev->dmasound.dma_blk + 2) % dev->dmasound.blocks; saa_writel(reg,next_blk * dev->dmasound.blksize); if (debug > 2) dprintk("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 pt_regs *regs) { 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,report); saa7134_irq_alsa_done(dev, status); } else { goto out; } } if (loop == 10) { dprintk("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(snd_pcm_substream_t * substream, int cmd) { snd_pcm_runtime_t *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; } /* * 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); videobuf_dma_init(&dev->dmasound.dma); err = videobuf_dma_init_kernel(&dev->dmasound.dma, PCI_DMA_FROMDEVICE, (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) { if (!dev->dmasound.blksize) BUG(); videobuf_dma_free(&dev->dmasound.dma); dev->dmasound.blocks = 0; dev->dmasound.blksize = 0; dev->dmasound.bufsize = 0; return 0; } /* * 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(snd_pcm_substream_t * substream) { snd_pcm_runtime_t *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; } dprintk("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; 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(snd_pcm_substream_t * substream) { snd_pcm_runtime_t *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 */ static snd_pcm_hardware_t 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 | SNDRV_PCM_RATE_48000, .rate_min = 32000, .rate_max = 48000, .channels_min = 1, .channels_max = 2, .buffer_bytes_max = (256*1024), .period_bytes_min = 64, .period_bytes_max = (256*1024), .periods_min = 2, .periods_max = 1024, }; static void snd_card_saa7134_runtime_free(snd_pcm_runtime_t *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(snd_pcm_substream_t * substream, snd_pcm_hw_params_t * 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); snd_assert(period_size >= 0x100 && period_size <= 0x10000, return -EINVAL); snd_assert(periods >= 2, return -EINVAL); snd_assert(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); videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma); 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; } if (0 != (err = videobuf_dma_pci_map(dev->pci, &dev->dmasound.dma))) { dsp_buffer_free(dev); return err; } if (0 != (err = saa7134_pgtable_alloc(dev->pci,&dev->dmasound.pt))) { videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma); dsp_buffer_free(dev); return err; } if (0 != (err = saa7134_pgtable_build(dev->pci,&dev->dmasound.pt, dev->dmasound.dma.sglist, dev->dmasound.dma.sglen, 0))) { saa7134_pgtable_free(dev->pci, &dev->dmasound.pt); videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma); 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.dma.vmalloc; return 1; } /* * 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(snd_pcm_substream_t * 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); videobuf_dma_pci_unmap(dev->pci, &dev->dmasound.dma); 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(snd_pcm_substream_t * substream) { 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(snd_pcm_substream_t * substream) { snd_pcm_runtime_t *runtime = substream->runtime; snd_card_saa7134_pcm_t *pcm; snd_card_saa7134_t *saa7134 = snd_pcm_substream_chip(substream); struct saa7134_dev *dev = saa7134->dev; int err; mutex_lock(&dev->dmasound.lock); dev->dmasound.read_count = 0; dev->dmasound.read_offset = 0; 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 ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0) return err; return 0; } /* * ALSA capture callbacks definition */ static snd_pcm_ops_t snd_card_saa7134_capture_ops = { .open = snd_card_saa7134_capture_open, .close = snd_card_saa7134_capture_close, .ioctl = snd_pcm_lib_ioctl, .hw_params = snd_card_saa7134_hw_params, .hw_free = snd_card_saa7134_hw_free, .prepare = snd_card_saa7134_capture_prepare, .trigger = snd_card_saa7134_capture_trigger, .pointer = snd_card_saa7134_capture_pointer, }; /* * 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) { snd_pcm_t *pcm; int err; if ((err = snd_pcm_new(saa7134->card, "SAA7134 PCM", device, 0, 1, &pcm)) < 0) return err; snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_card_saa7134_capture_ops); pcm->private_data = saa7134; pcm->info_flags = 0; strcpy(pcm->name, "SAA7134 PCM"); return 0; } #define SAA713x_VOLUME(xname, xindex, addr) \ { .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .index = xindex, \ .info = snd_saa7134_volume_info, \ .get = snd_saa7134_volume_get, .put = snd_saa7134_volume_put, \ .private_value = addr } static int snd_saa7134_volume_info(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * 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(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * 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(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) { snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); 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 = chip->mixer_volume[addr][0] != left || chip->mixer_volume[addr][1] != right; 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(snd_kcontrol_t * kcontrol, snd_ctl_elem_info_t * 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(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) { snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); int addr = kcontrol->private_value; spin_lock_irq(&chip->mixer_lock); ucontrol->value.integer.value[0] = chip->capture_source[addr][0]; ucontrol->value.integer.value[1] = chip->capture_source[addr][1]; spin_unlock_irq(&chip->mixer_lock); return 0; } static int snd_saa7134_capsrc_put(snd_kcontrol_t * kcontrol, snd_ctl_elem_value_t * ucontrol) { snd_card_saa7134_t *chip = snd_kcontrol_chip(kcontrol); int change, addr = kcontrol->private_value; int left, right; u32 anabar, xbarin; int analog_io, rate; struct saa7134_dev *dev; dev = chip->dev; left = ucontrol->value.integer.value[0] & 1; right = ucontrol->value.integer.value[1] & 1; spin_lock_irq(&chip->mixer_lock); change = chip->capture_source[addr][0] != left || chip->capture_source[addr][1] != right; chip->capture_source[addr][0] = left; chip->capture_source[addr][1] = right; 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; } } return change; } static snd_kcontrol_new_t snd_saa7134_controls[] = { SAA713x_VOLUME("Video Volume", 0, MIXER_ADDR_TVTUNER), SAA713x_CAPSRC("Video Capture Switch", 0, MIXER_ADDR_TVTUNER), SAA713x_VOLUME("Line Volume", 1, MIXER_ADDR_LINE1), SAA713x_CAPSRC("Line Capture Switch", 1, MIXER_ADDR_LINE1), SAA713x_VOLUME("Line Volume", 2, MIXER_ADDR_LINE2), 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) { snd_card_t *card = chip->card; unsigned int idx; int err; snd_assert(chip != NULL, return -EINVAL); strcpy(card->mixername, "SAA7134 Mixer"); for (idx = 0; idx < ARRAY_SIZE(snd_saa7134_controls); idx++) { if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_saa7134_controls[idx], chip))) < 0) return err; } return 0; } static void snd_saa7134_free(snd_card_t * card) { snd_card_saa7134_t *chip = card->private_data; if (chip->dev->dmasound.priv_data == NULL) return; if (chip->irq >= 0) { synchronize_irq(chip->irq); 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) { snd_card_t *card; snd_card_saa7134_t *chip; int err; if (devnum >= SNDRV_CARDS) return -ENODEV; if (!enable[devnum]) return -ENODEV; card = snd_card_new(index[devnum], id[devnum], THIS_MODULE, sizeof(snd_card_saa7134_t)); if (card == NULL) return -ENOMEM; strcpy(card->driver, "SAA7134"); /* Card "creation" */ card->private_free = snd_saa7134_free; chip = (snd_card_saa7134_t *) 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, SA_SHIRQ | SA_INTERRUPT, dev->name, (void*) &dev->dmasound); if (err < 0) { printk(KERN_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; snd_card_set_dev(card, &chip->pci->dev); /* End of "creation" */ strcpy(card->shortname, "SAA7134"); sprintf(card->longname, "%s at 0x%lx irq %d", chip->dev->name, chip->iobase, chip->irq); printk(KERN_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) { 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; if (!dmasound_init && !dmasound_exit) { dmasound_init = alsa_device_init; dmasound_exit = alsa_device_exit; } else { printk(KERN_WARNING "saa7134 ALSA: can't load, DMA sound handler already assigned (probably to OSS)\n"); return -EBUSY; } printk(KERN_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->dmasound.priv_data == NULL) { alsa_device_init(dev); } else { printk(KERN_ERR "saa7134 ALSA: DMA sound is being handled by OSS. ignoring %s\n",dev->name); return -EBUSY; } } if (dev == NULL) printk(KERN_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++) { snd_card_free(snd_saa7134_cards[idx]); } dmasound_init = NULL; dmasound_exit = NULL; printk(KERN_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");