static int atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd) { struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); unsigned long camr, ptcr = 0; int retval = 0; camr = ac97c_readl(chip, CAMR); ptcr = readl(chip->regs + ATMEL_PDC_PTSR); switch (cmd) { case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */ case SNDRV_PCM_TRIGGER_RESUME: /* fall through */ case SNDRV_PCM_TRIGGER_START: if (cpu_is_at32ap7000()) { retval = dw_dma_cyclic_start(chip->dma.rx_chan); if (retval) goto out; } else { ptcr = ATMEL_PDC_RXTEN; } camr |= AC97C_CMR_CENA | AC97C_CSR_ENDRX; break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */ case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */ case SNDRV_PCM_TRIGGER_STOP: if (cpu_is_at32ap7000()) dw_dma_cyclic_stop(chip->dma.rx_chan); else ptcr |= (ATMEL_PDC_RXTDIS); if (chip->opened <= 1) camr &= ~AC97C_CMR_CENA; break; default: retval = -EINVAL; break; } ac97c_writel(chip, CAMR, camr); if (!cpu_is_at32ap7000()) writel(ptcr, chip->regs + ATMEL_PDC_PTCR); out: return retval; }
static irqreturn_t atmel_ac97c_interrupt(int irq, void *dev) { struct atmel_ac97c *chip = (struct atmel_ac97c *)dev; irqreturn_t retval = IRQ_NONE; u32 sr = ac97c_readl(chip, SR); u32 casr = ac97c_readl(chip, CASR); u32 cosr = ac97c_readl(chip, COSR); u32 camr = ac97c_readl(chip, CAMR); if (sr & AC97C_SR_CAEVT) { struct snd_pcm_runtime *runtime; int offset, next_period, block_size; dev_dbg(&chip->pdev->dev, "channel A event%s%s%s%s%s%s\n", casr & AC97C_CSR_OVRUN ? " OVRUN" : "", casr & AC97C_CSR_RXRDY ? " RXRDY" : "", casr & AC97C_CSR_UNRUN ? " UNRUN" : "", casr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", casr & AC97C_CSR_TXRDY ? " TXRDY" : "", !casr ? " NONE" : ""); if (!cpu_is_at32ap7000()) { if ((casr & camr) & AC97C_CSR_ENDTX) { runtime = chip->playback_substream->runtime; block_size = frames_to_bytes(runtime, runtime->period_size); chip->period++; if (chip->period == runtime->periods) chip->period = 0; next_period = chip->period + 1; if (next_period == runtime->periods) next_period = 0; offset = block_size * next_period; writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_TNPR); writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR); snd_pcm_period_elapsed( chip->playback_substream); } if ((casr & camr) & AC97C_CSR_ENDRX) { runtime = chip->capture_substream->runtime; block_size = frames_to_bytes(runtime, runtime->period_size); chip->period++; if (chip->period == runtime->periods) chip->period = 0; next_period = chip->period + 1; if (next_period == runtime->periods) next_period = 0; offset = block_size * next_period; writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_RNPR); writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); snd_pcm_period_elapsed(chip->capture_substream); } } retval = IRQ_HANDLED; } if (sr & AC97C_SR_COEVT) { dev_dbg(&chip->pdev->dev, "codec channel event%s%s%s%s%s\n", cosr & AC97C_CSR_OVRUN ? " OVRUN" : "", cosr & AC97C_CSR_RXRDY ? " RXRDY" : "", cosr & AC97C_CSR_TXEMPTY ? " TXEMPTY" : "", cosr & AC97C_CSR_TXRDY ? " TXRDY" : "", !cosr ? " NONE" : ""); retval = IRQ_HANDLED; } if (retval == IRQ_NONE) { dev_err(&chip->pdev->dev, "spurious interrupt sr 0x%08x " "casr 0x%08x cosr 0x%08x\n", sr, casr, cosr); } return retval; }
static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream) { struct atmel_ac97c *chip = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; int block_size = frames_to_bytes(runtime, runtime->period_size); unsigned long word = ac97c_readl(chip, ICA); int retval; chip->period = 0; word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); /* assign channels to AC97C channel A */ switch (runtime->channels) { case 1: word |= AC97C_CH_ASSIGN(PCM_LEFT, A); break; case 2: word |= AC97C_CH_ASSIGN(PCM_LEFT, A) | AC97C_CH_ASSIGN(PCM_RIGHT, A); break; default: /* TODO: support more than two channels */ return -EINVAL; } ac97c_writel(chip, ICA, word); /* configure sample format and size */ word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16; switch (runtime->format) { case SNDRV_PCM_FORMAT_S16_LE: word |= AC97C_CMR_CEM_LITTLE; break; case SNDRV_PCM_FORMAT_S16_BE: /* fall through */ word &= ~(AC97C_CMR_CEM_LITTLE); break; default: word = ac97c_readl(chip, ICA); word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT)); ac97c_writel(chip, ICA, word); return -EINVAL; } /* Enable overrun interrupt on channel A */ word |= AC97C_CSR_OVRUN; ac97c_writel(chip, CAMR, word); /* Enable channel A event interrupt */ word = ac97c_readl(chip, IMR); word |= AC97C_SR_CAEVT; ac97c_writel(chip, IER, /*word*/AC97C_SR_CAEVT); /* Enable channel A event interrupt */ /*word = ac97c_readl(chip, IMR); word |= AC97C_SR_CAEVT; ac97c_writel(chip, IER, word);*/ /* set variable rate if needed */ if (runtime->rate != 48000) { word = ac97c_readl(chip, MR); word |= AC97C_MR_VRA; ac97c_writel(chip, MR, word); } else { word = ac97c_readl(chip, MR); word &= ~(AC97C_MR_VRA); ac97c_writel(chip, MR, word); } retval = snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate); if (retval) dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n", runtime->rate); if (cpu_is_at32ap7000()) { if (!test_bit(DMA_RX_READY, &chip->flags)) retval = atmel_ac97c_prepare_dma(chip, substream, DMA_FROM_DEVICE); } else { /* Initialize and start the PDC */ writel(runtime->dma_addr, chip->regs + ATMEL_PDC_RPR); writel(block_size / 2, chip->regs + ATMEL_PDC_RCR); writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_RNPR); writel(block_size / 2, chip->regs + ATMEL_PDC_RNCR); } return retval; }