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Diffstat (limited to 'sound/atmel/ac97c.c')
-rw-r--r--sound/atmel/ac97c.c589
1 files changed, 435 insertions, 154 deletions
diff --git a/sound/atmel/ac97c.c b/sound/atmel/ac97c.c
index dd72e00e5ae..a04d23174dc 100644
--- a/sound/atmel/ac97c.c
+++ b/sound/atmel/ac97c.c
@@ -1,5 +1,5 @@
/*
- * Driver for the Atmel AC97C controller
+ * Driver for Atmel AC97C
*
* Copyright (C) 2005-2009 Atmel Corporation
*
@@ -10,14 +10,17 @@
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/bitmap.h>
+#include <linux/device.h>
#include <linux/dmaengine.h>
#include <linux/dma-mapping.h>
+#include <linux/atmel_pdc.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/gpio.h>
+#include <linux/types.h>
#include <linux/io.h>
#include <sound/core.h>
@@ -30,6 +33,12 @@
#include <linux/dw_dmac.h>
+#include <mach/cpu.h>
+
+#ifdef CONFIG_ARCH_AT91
+#include <mach/hardware.h>
+#endif
+
#include "ac97c.h"
enum {
@@ -62,9 +71,11 @@ struct atmel_ac97c {
u64 cur_format;
unsigned int cur_rate;
unsigned long flags;
+ int playback_period, capture_period;
/* Serialize access to opened variable */
spinlock_t lock;
void __iomem *regs;
+ int irq;
int opened;
int reset_pin;
};
@@ -91,7 +102,7 @@ static void atmel_ac97c_dma_capture_period_done(void *arg)
static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
struct snd_pcm_substream *substream,
- enum dma_data_direction direction)
+ enum dma_transfer_direction direction)
{
struct dma_chan *chan;
struct dw_cyclic_desc *cdesc;
@@ -107,7 +118,7 @@ static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
return -EINVAL;
}
- if (direction == DMA_TO_DEVICE)
+ if (direction == DMA_MEM_TO_DEV)
chan = chip->dma.tx_chan;
else
chan = chip->dma.rx_chan;
@@ -122,7 +133,7 @@ static int atmel_ac97c_prepare_dma(struct atmel_ac97c *chip,
return PTR_ERR(cdesc);
}
- if (direction == DMA_TO_DEVICE) {
+ if (direction == DMA_MEM_TO_DEV) {
cdesc->period_callback = atmel_ac97c_dma_playback_period_done;
set_bit(DMA_TX_READY, &chip->flags);
} else {
@@ -150,10 +161,10 @@ static struct snd_pcm_hardware atmel_ac97c_hw = {
.rate_max = 48000,
.channels_min = 1,
.channels_max = 2,
- .buffer_bytes_max = 64 * 4096,
+ .buffer_bytes_max = 2 * 2 * 64 * 2048,
.period_bytes_min = 4096,
.period_bytes_max = 4096,
- .periods_min = 4,
+ .periods_min = 6,
.periods_max = 64,
};
@@ -170,7 +181,7 @@ static int atmel_ac97c_playback_open(struct snd_pcm_substream *substream)
runtime->hw.rate_max = chip->cur_rate;
}
if (chip->cur_format)
- runtime->hw.formats = (1ULL << chip->cur_format);
+ runtime->hw.formats = pcm_format_to_bits(chip->cur_format);
mutex_unlock(&opened_mutex);
chip->playback_substream = substream;
return 0;
@@ -189,7 +200,7 @@ static int atmel_ac97c_capture_open(struct snd_pcm_substream *substream)
runtime->hw.rate_max = chip->cur_rate;
}
if (chip->cur_format)
- runtime->hw.formats = (1ULL << chip->cur_format);
+ runtime->hw.formats = pcm_format_to_bits(chip->cur_format);
mutex_unlock(&opened_mutex);
chip->capture_substream = substream;
return 0;
@@ -240,10 +251,12 @@ static int atmel_ac97c_playback_hw_params(struct snd_pcm_substream *substream,
if (retval < 0)
return retval;
/* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (retval == 1)
- if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.tx_chan);
-
+ if (cpu_is_at32ap7000()) {
+ /* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
+ if (retval == 1)
+ if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_free(chip->dma.tx_chan);
+ }
/* Set restrictions to params. */
mutex_lock(&opened_mutex);
chip->cur_rate = params_rate(hw_params);
@@ -264,7 +277,7 @@ static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream,
if (retval < 0)
return retval;
/* snd_pcm_lib_malloc_pages returns 1 if buffer is changed. */
- if (retval == 1)
+ if (cpu_is_at32ap7000() && retval == 1)
if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
dw_dma_cyclic_free(chip->dma.rx_chan);
@@ -280,16 +293,20 @@ static int atmel_ac97c_capture_hw_params(struct snd_pcm_substream *substream,
static int atmel_ac97c_playback_hw_free(struct snd_pcm_substream *substream)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000()) {
+ if (test_and_clear_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_free(chip->dma.tx_chan);
+ }
return snd_pcm_lib_free_pages(substream);
}
static int atmel_ac97c_capture_hw_free(struct snd_pcm_substream *substream)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_free(chip->dma.rx_chan);
+ if (cpu_is_at32ap7000()) {
+ if (test_and_clear_bit(DMA_RX_READY, &chip->flags))
+ dw_dma_cyclic_free(chip->dma.rx_chan);
+ }
return snd_pcm_lib_free_pages(substream);
}
@@ -297,9 +314,13 @@ static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
- unsigned long word = 0;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
+ unsigned long word = ac97c_readl(chip, OCA);
int retval;
+ chip->playback_period = 0;
+ word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
+
/* assign channels to AC97C channel A */
switch (runtime->channels) {
case 1:
@@ -312,25 +333,41 @@ static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
default:
/* TODO: support more than two channels */
return -EINVAL;
- break;
}
ac97c_writel(chip, OCA, word);
/* configure sample format and size */
- word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
+ word = ac97c_readl(chip, CAMR);
+ if (chip->opened <= 1)
+ word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
+ else
+ word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
- word |= AC97C_CMR_CEM_LITTLE;
+ if (cpu_is_at32ap7000())
+ word |= AC97C_CMR_CEM_LITTLE;
break;
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
- default:
word &= ~(AC97C_CMR_CEM_LITTLE);
break;
+ default:
+ word = ac97c_readl(chip, OCA);
+ word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
+ ac97c_writel(chip, OCA, word);
+ return -EINVAL;
}
+ /* Enable underrun interrupt on channel A */
+ word |= AC97C_CSR_UNRUN;
+
ac97c_writel(chip, CAMR, word);
+ /* 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);
@@ -348,9 +385,18 @@ static int atmel_ac97c_playback_prepare(struct snd_pcm_substream *substream)
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
runtime->rate);
- if (!test_bit(DMA_TX_READY, &chip->flags))
- retval = atmel_ac97c_prepare_dma(chip, substream,
- DMA_TO_DEVICE);
+ if (cpu_is_at32ap7000()) {
+ if (!test_bit(DMA_TX_READY, &chip->flags))
+ retval = atmel_ac97c_prepare_dma(chip, substream,
+ DMA_MEM_TO_DEV);
+ } else {
+ /* Initialize and start the PDC */
+ writel(runtime->dma_addr, chip->regs + ATMEL_PDC_TPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_TCR);
+ writel(runtime->dma_addr + block_size,
+ chip->regs + ATMEL_PDC_TNPR);
+ writel(block_size / 2, chip->regs + ATMEL_PDC_TNCR);
+ }
return retval;
}
@@ -359,9 +405,13 @@ 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;
- unsigned long word = 0;
+ int block_size = frames_to_bytes(runtime, runtime->period_size);
+ unsigned long word = ac97c_readl(chip, ICA);
int retval;
+ chip->capture_period = 0;
+ word &= ~(AC97C_CH_MASK(PCM_LEFT) | AC97C_CH_MASK(PCM_RIGHT));
+
/* assign channels to AC97C channel A */
switch (runtime->channels) {
case 1:
@@ -374,25 +424,41 @@ static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
default:
/* TODO: support more than two channels */
return -EINVAL;
- break;
}
ac97c_writel(chip, ICA, word);
/* configure sample format and size */
- word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
+ word = ac97c_readl(chip, CAMR);
+ if (chip->opened <= 1)
+ word = AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
+ else
+ word |= AC97C_CMR_DMAEN | AC97C_CMR_SIZE_16;
switch (runtime->format) {
case SNDRV_PCM_FORMAT_S16_LE:
- word |= AC97C_CMR_CEM_LITTLE;
+ if (cpu_is_at32ap7000())
+ word |= AC97C_CMR_CEM_LITTLE;
break;
case SNDRV_PCM_FORMAT_S16_BE: /* fall through */
- default:
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);
+
/* set variable rate if needed */
if (runtime->rate != 48000) {
word = ac97c_readl(chip, MR);
@@ -410,9 +476,18 @@ static int atmel_ac97c_capture_prepare(struct snd_pcm_substream *substream)
dev_dbg(&chip->pdev->dev, "could not set rate %d Hz\n",
runtime->rate);
- if (!test_bit(DMA_RX_READY, &chip->flags))
- retval = atmel_ac97c_prepare_dma(chip, substream,
- DMA_FROM_DEVICE);
+ if (cpu_is_at32ap7000()) {
+ if (!test_bit(DMA_RX_READY, &chip->flags))
+ retval = atmel_ac97c_prepare_dma(chip, substream,
+ DMA_DEV_TO_MEM);
+ } 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;
}
@@ -421,7 +496,7 @@ static int
atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct atmel_ac97c *chip = snd_pcm_substream_chip(substream);
- unsigned long camr;
+ unsigned long camr, ptcr = 0;
int retval = 0;
camr = ac97c_readl(chip, CAMR);
@@ -430,15 +505,22 @@ atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: /* fall through */
case SNDRV_PCM_TRIGGER_RESUME: /* fall through */
case SNDRV_PCM_TRIGGER_START:
- retval = dw_dma_cyclic_start(chip->dma.tx_chan);
- if (retval)
- goto out;
- camr |= AC97C_CMR_CENA;
+ if (cpu_is_at32ap7000()) {
+ retval = dw_dma_cyclic_start(chip->dma.tx_chan);
+ if (retval)
+ goto out;
+ } else {
+ ptcr = ATMEL_PDC_TXTEN;
+ }
+ camr |= AC97C_CMR_CENA | AC97C_CSR_ENDTX;
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH: /* fall through */
case SNDRV_PCM_TRIGGER_SUSPEND: /* fall through */
case SNDRV_PCM_TRIGGER_STOP:
- dw_dma_cyclic_stop(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000())
+ dw_dma_cyclic_stop(chip->dma.tx_chan);
+ else
+ ptcr |= ATMEL_PDC_TXTDIS;
if (chip->opened <= 1)
camr &= ~AC97C_CMR_CENA;
break;
@@ -448,6 +530,8 @@ atmel_ac97c_playback_trigger(struct snd_pcm_substream *substream, int cmd)
}
ac97c_writel(chip, CAMR, camr);
+ if (!cpu_is_at32ap7000())
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
out:
return retval;
}
@@ -456,24 +540,32 @@ 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;
+ 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:
- retval = dw_dma_cyclic_start(chip->dma.rx_chan);
- if (retval)
- goto out;
- camr |= AC97C_CMR_CENA;
+ 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:
- dw_dma_cyclic_stop(chip->dma.rx_chan);
+ 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;
@@ -483,6 +575,8 @@ atmel_ac97c_capture_trigger(struct snd_pcm_substream *substream, int cmd)
}
ac97c_writel(chip, CAMR, camr);
+ if (!cpu_is_at32ap7000())
+ writel(ptcr, chip->regs + ATMEL_PDC_PTCR);
out:
return retval;
}
@@ -495,7 +589,10 @@ atmel_ac97c_playback_pointer(struct snd_pcm_substream *substream)
snd_pcm_uframes_t frames;
unsigned long bytes;
- bytes = dw_dma_get_src_addr(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000())
+ bytes = dw_dma_get_src_addr(chip->dma.tx_chan);
+ else
+ bytes = readl(chip->regs + ATMEL_PDC_TPR);
bytes -= runtime->dma_addr;
frames = bytes_to_frames(runtime, bytes);
@@ -512,7 +609,10 @@ atmel_ac97c_capture_pointer(struct snd_pcm_substream *substream)
snd_pcm_uframes_t frames;
unsigned long bytes;
- bytes = dw_dma_get_dst_addr(chip->dma.rx_chan);
+ if (cpu_is_at32ap7000())
+ bytes = dw_dma_get_dst_addr(chip->dma.rx_chan);
+ else
+ bytes = readl(chip->regs + ATMEL_PDC_RPR);
bytes -= runtime->dma_addr;
frames = bytes_to_frames(runtime, bytes);
@@ -543,15 +643,134 @@ static struct snd_pcm_ops atmel_ac97_capture_ops = {
.pointer = atmel_ac97c_capture_pointer,
};
-static int __devinit atmel_ac97c_pcm_new(struct atmel_ac97c *chip)
+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[] = {
+ /* 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),
+ } }
+ },
+};
+
+static int atmel_ac97c_pcm_new(struct atmel_ac97c *chip)
{
struct snd_pcm *pcm;
struct snd_pcm_hardware hw = atmel_ac97c_hw;
- int capture, playback, retval;
+ int capture, playback, retval, err;
capture = test_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
playback = test_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ if (!cpu_is_at32ap7000()) {
+ err = snd_ac97_pcm_assign(chip->ac97_bus,
+ ARRAY_SIZE(at91_ac97_pcm_defs),
+ at91_ac97_pcm_defs);
+ if (err)
+ return err;
+ }
retval = snd_pcm_new(chip->card, chip->card->shortname,
chip->pdev->id, playback, capture, &pcm);
if (retval)
@@ -665,20 +884,24 @@ static bool filter(struct dma_chan *chan, void *slave)
static void atmel_ac97c_reset(struct atmel_ac97c *chip)
{
- ac97c_writel(chip, MR, AC97C_MR_WRST);
+ ac97c_writel(chip, MR, 0);
+ ac97c_writel(chip, MR, AC97C_MR_ENA);
+ ac97c_writel(chip, CAMR, 0);
+ ac97c_writel(chip, COMR, 0);
if (gpio_is_valid(chip->reset_pin)) {
gpio_set_value(chip->reset_pin, 0);
/* AC97 v2.2 specifications says minimum 1 us. */
- udelay(10);
+ udelay(2);
gpio_set_value(chip->reset_pin, 1);
+ } else {
+ ac97c_writel(chip, MR, AC97C_MR_WRST | AC97C_MR_ENA);
+ udelay(2);
+ ac97c_writel(chip, MR, AC97C_MR_ENA);
}
-
- udelay(1);
- ac97c_writel(chip, MR, AC97C_MR_ENA);
}
-static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
+static int atmel_ac97c_probe(struct platform_device *pdev)
{
struct snd_card *card;
struct atmel_ac97c *chip;
@@ -690,6 +913,7 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
.read = atmel_ac97c_read,
};
int retval;
+ int irq;
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!regs) {
@@ -703,15 +927,27 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
return -ENXIO;
}
- pclk = clk_get(&pdev->dev, "pclk");
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_dbg(&pdev->dev, "could not get irq\n");
+ return -ENXIO;
+ }
+
+ if (cpu_is_at32ap7000()) {
+ pclk = clk_get(&pdev->dev, "pclk");
+ } else {
+ pclk = clk_get(&pdev->dev, "ac97_clk");
+ }
+
if (IS_ERR(pclk)) {
dev_dbg(&pdev->dev, "no peripheral clock\n");
return PTR_ERR(pclk);
}
clk_enable(pclk);
- retval = snd_card_create(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
- THIS_MODULE, sizeof(struct atmel_ac97c), &card);
+ retval = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1,
+ SNDRV_DEFAULT_STR1, THIS_MODULE,
+ sizeof(struct atmel_ac97c), &card);
if (retval) {
dev_dbg(&pdev->dev, "could not create sound card device\n");
goto err_snd_card_new;
@@ -719,6 +955,13 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
chip = get_chip(card);
+ retval = request_irq(irq, atmel_ac97c_interrupt, 0, "AC97C", chip);
+ if (retval) {
+ dev_dbg(&pdev->dev, "unable to request irq %d\n", irq);
+ goto err_request_irq;
+ }
+ chip->irq = irq;
+
spin_lock_init(&chip->lock);
strcpy(card->driver, "Atmel AC97C");
@@ -728,10 +971,11 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
chip->card = card;
chip->pclk = pclk;
chip->pdev = pdev;
- chip->regs = ioremap(regs->start, regs->end - regs->start + 1);
+ chip->regs = ioremap(regs->start, resource_size(regs));
if (!chip->regs) {
dev_dbg(&pdev->dev, "could not remap register memory\n");
+ retval = -ENOMEM;
goto err_ioremap;
}
@@ -743,9 +987,15 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
gpio_direction_output(pdata->reset_pin, 1);
chip->reset_pin = pdata->reset_pin;
}
+ } else {
+ chip->reset_pin = -EINVAL;
}
- snd_card_set_dev(card, &pdev->dev);
+ atmel_ac97c_reset(chip);
+
+ /* Enable overrun interrupt from codec channel */
+ ac97c_writel(chip, COMR, AC97C_CSR_OVRUN);
+ ac97c_writel(chip, IER, ac97c_readl(chip, IMR) | AC97C_SR_COEVT);
retval = snd_ac97_bus(card, 0, &ops, chip, &chip->ac97_bus);
if (retval) {
@@ -753,53 +1003,84 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
goto err_ac97_bus;
}
- atmel_ac97c_reset(chip);
-
retval = atmel_ac97c_mixer_new(chip);
if (retval) {
dev_dbg(&pdev->dev, "could not register ac97 mixer\n");
goto err_ac97_bus;
}
- if (pdata->rx_dws.dma_dev) {
- struct dw_dma_slave *dws = &pdata->rx_dws;
- dma_cap_mask_t mask;
-
- dws->rx_reg = regs->start + AC97C_CARHR + 2;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
+ if (cpu_is_at32ap7000()) {
+ if (pdata->rx_dws.dma_dev) {
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ chip->dma.rx_chan = dma_request_channel(mask, filter,
+ &pdata->rx_dws);
+ if (chip->dma.rx_chan) {
+ struct dma_slave_config dma_conf = {
+ .src_addr = regs->start + AC97C_CARHR +
+ 2,
+ .src_addr_width =
+ DMA_SLAVE_BUSWIDTH_2_BYTES,
+ .src_maxburst = 1,
+ .dst_maxburst = 1,
+ .direction = DMA_DEV_TO_MEM,
+ .device_fc = false,
+ };
+
+ dmaengine_slave_config(chip->dma.rx_chan,
+ &dma_conf);
+ }
+
+ dev_info(&chip->pdev->dev, "using %s for DMA RX\n",
+ dev_name(&chip->dma.rx_chan->dev->device));
+ set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
+ }
- chip->dma.rx_chan = dma_request_channel(mask, filter, dws);
+ if (pdata->tx_dws.dma_dev) {
+ dma_cap_mask_t mask;
+
+ dma_cap_zero(mask);
+ dma_cap_set(DMA_SLAVE, mask);
+
+ chip->dma.tx_chan = dma_request_channel(mask, filter,
+ &pdata->tx_dws);
+ if (chip->dma.tx_chan) {
+ struct dma_slave_config dma_conf = {
+ .dst_addr = regs->start + AC97C_CATHR +
+ 2,
+ .dst_addr_width =
+ DMA_SLAVE_BUSWIDTH_2_BYTES,
+ .src_maxburst = 1,
+ .dst_maxburst = 1,
+ .direction = DMA_MEM_TO_DEV,
+ .device_fc = false,
+ };
+
+ dmaengine_slave_config(chip->dma.tx_chan,
+ &dma_conf);
+ }
+
+ dev_info(&chip->pdev->dev, "using %s for DMA TX\n",
+ dev_name(&chip->dma.tx_chan->dev->device));
+ set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ }
- dev_info(&chip->pdev->dev, "using %s for DMA RX\n",
- chip->dma.rx_chan->dev->device.bus_id);
+ if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) &&
+ !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) {
+ dev_dbg(&pdev->dev, "DMA not available\n");
+ retval = -ENODEV;
+ goto err_dma;
+ }
+ } else {
+ /* Just pretend that we have DMA channel(for at91 i is actually
+ * the PDC) */
set_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- }
-
- if (pdata->tx_dws.dma_dev) {
- struct dw_dma_slave *dws = &pdata->tx_dws;
- dma_cap_mask_t mask;
-
- dws->tx_reg = regs->start + AC97C_CATHR + 2;
-
- dma_cap_zero(mask);
- dma_cap_set(DMA_SLAVE, mask);
-
- chip->dma.tx_chan = dma_request_channel(mask, filter, dws);
-
- dev_info(&chip->pdev->dev, "using %s for DMA TX\n",
- chip->dma.tx_chan->dev->device.bus_id);
set_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
}
- if (!test_bit(DMA_RX_CHAN_PRESENT, &chip->flags) &&
- !test_bit(DMA_TX_CHAN_PRESENT, &chip->flags)) {
- dev_dbg(&pdev->dev, "DMA not available\n");
- retval = -ENODEV;
- goto err_dma;
- }
-
retval = atmel_ac97c_pcm_new(chip);
if (retval) {
dev_dbg(&pdev->dev, "could not register ac97 pcm device\n");
@@ -809,33 +1090,35 @@ static int __devinit atmel_ac97c_probe(struct platform_device *pdev)
retval = snd_card_register(card);
if (retval) {
dev_dbg(&pdev->dev, "could not register sound card\n");
- goto err_ac97_bus;
+ goto err_dma;
}
platform_set_drvdata(pdev, card);
- dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p\n",
- chip->regs);
+ dev_info(&pdev->dev, "Atmel AC97 controller at 0x%p, irq = %d\n",
+ chip->regs, irq);
return 0;
err_dma:
- if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.rx_chan);
- if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.tx_chan);
- clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- chip->dma.rx_chan = NULL;
- chip->dma.tx_chan = NULL;
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.tx_chan);
+ clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
+ clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ chip->dma.rx_chan = NULL;
+ chip->dma.tx_chan = NULL;
+ }
err_ac97_bus:
- snd_card_set_dev(card, NULL);
-
if (gpio_is_valid(chip->reset_pin))
gpio_free(chip->reset_pin);
iounmap(chip->regs);
err_ioremap:
+ free_irq(irq, chip);
+err_request_irq:
snd_card_free(card);
err_snd_card_new:
clk_disable(pclk);
@@ -843,40 +1126,45 @@ err_snd_card_new:
return retval;
}
-#ifdef CONFIG_PM
-static int atmel_ac97c_suspend(struct platform_device *pdev, pm_message_t msg)
+#ifdef CONFIG_PM_SLEEP
+static int atmel_ac97c_suspend(struct device *pdev)
{
- struct snd_card *card = platform_get_drvdata(pdev);
+ struct snd_card *card = dev_get_drvdata(pdev);
struct atmel_ac97c *chip = card->private_data;
- if (test_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_stop(chip->dma.rx_chan);
- if (test_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_stop(chip->dma.tx_chan);
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_READY, &chip->flags))
+ dw_dma_cyclic_stop(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_stop(chip->dma.tx_chan);
+ }
clk_disable(chip->pclk);
return 0;
}
-static int atmel_ac97c_resume(struct platform_device *pdev)
+static int atmel_ac97c_resume(struct device *pdev)
{
- struct snd_card *card = platform_get_drvdata(pdev);
+ struct snd_card *card = dev_get_drvdata(pdev);
struct atmel_ac97c *chip = card->private_data;
clk_enable(chip->pclk);
- if (test_bit(DMA_RX_READY, &chip->flags))
- dw_dma_cyclic_start(chip->dma.rx_chan);
- if (test_bit(DMA_TX_READY, &chip->flags))
- dw_dma_cyclic_start(chip->dma.tx_chan);
-
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_READY, &chip->flags))
+ dw_dma_cyclic_start(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_READY, &chip->flags))
+ dw_dma_cyclic_start(chip->dma.tx_chan);
+ }
return 0;
}
+
+static SIMPLE_DEV_PM_OPS(atmel_ac97c_pm, atmel_ac97c_suspend, atmel_ac97c_resume);
+#define ATMEL_AC97C_PM_OPS &atmel_ac97c_pm
#else
-#define atmel_ac97c_suspend NULL
-#define atmel_ac97c_resume NULL
+#define ATMEL_AC97C_PM_OPS NULL
#endif
-static int __devexit atmel_ac97c_remove(struct platform_device *pdev)
+static int atmel_ac97c_remove(struct platform_device *pdev)
{
struct snd_card *card = platform_get_drvdata(pdev);
struct atmel_ac97c *chip = get_chip(card);
@@ -884,49 +1172,42 @@ static int __devexit atmel_ac97c_remove(struct platform_device *pdev)
if (gpio_is_valid(chip->reset_pin))
gpio_free(chip->reset_pin);
+ ac97c_writel(chip, CAMR, 0);
+ ac97c_writel(chip, COMR, 0);
+ ac97c_writel(chip, MR, 0);
+
clk_disable(chip->pclk);
clk_put(chip->pclk);
iounmap(chip->regs);
+ free_irq(chip->irq, chip);
+
+ if (cpu_is_at32ap7000()) {
+ if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.rx_chan);
+ if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
+ dma_release_channel(chip->dma.tx_chan);
+ clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
+ clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
+ chip->dma.rx_chan = NULL;
+ chip->dma.tx_chan = NULL;
+ }
- if (test_bit(DMA_RX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.rx_chan);
- if (test_bit(DMA_TX_CHAN_PRESENT, &chip->flags))
- dma_release_channel(chip->dma.tx_chan);
- clear_bit(DMA_RX_CHAN_PRESENT, &chip->flags);
- clear_bit(DMA_TX_CHAN_PRESENT, &chip->flags);
- chip->dma.rx_chan = NULL;
- chip->dma.tx_chan = NULL;
-
- snd_card_set_dev(card, NULL);
snd_card_free(card);
- platform_set_drvdata(pdev, NULL);
-
return 0;
}
static struct platform_driver atmel_ac97c_driver = {
- .remove = __devexit_p(atmel_ac97c_remove),
+ .probe = atmel_ac97c_probe,
+ .remove = atmel_ac97c_remove,
.driver = {
.name = "atmel_ac97c",
+ .owner = THIS_MODULE,
+ .pm = ATMEL_AC97C_PM_OPS,
},
- .suspend = atmel_ac97c_suspend,
- .resume = atmel_ac97c_resume,
};
-
-static int __init atmel_ac97c_init(void)
-{
- return platform_driver_probe(&atmel_ac97c_driver,
- atmel_ac97c_probe);
-}
-module_init(atmel_ac97c_init);
-
-static void __exit atmel_ac97c_exit(void)
-{
- platform_driver_unregister(&atmel_ac97c_driver);
-}
-module_exit(atmel_ac97c_exit);
+module_platform_driver(atmel_ac97c_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Driver for Atmel AC97 controller");
-MODULE_AUTHOR("Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>");
+MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-08 12:39:57 +0000