+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->playback_period++;
+
+ if (chip->playback_period == runtime->periods)
+ chip->playback_period = 0;
+ next_period = chip->playback_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->capture_period++;
+
+ if (chip->capture_period == runtime->periods)
+ chip->capture_period = 0;
+ next_period = chip->capture_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_info(&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 struct ac97_pcm at91_ac97_pcm_defs[] __devinitdata = {
+ /* Playback */
+ {
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)),
+ } },
+ },
+ /* PCM in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = ((1 << AC97_SLOT_PCM_LEFT)
+ | (1 << AC97_SLOT_PCM_RIGHT)),
+ } }
+ },
+ /* Mic in */
+ {
+ .stream = 1,
+ .exclusive = 1,
+ .r = { {
+ .slots = (1<<AC97_SLOT_MIC),
+ } }
+ },
+};
+