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-rw-r--r--sound/soc/atmel/Kconfig13
-rw-r--r--sound/soc/atmel/Makefile4
-rw-r--r--sound/soc/atmel/atmel-pcm-dma.c240
-rw-r--r--sound/soc/atmel/atmel-pcm-pdc.c401
-rw-r--r--sound/soc/atmel/atmel-pcm.c401
-rw-r--r--sound/soc/atmel/atmel-pcm.h34
-rw-r--r--sound/soc/atmel/atmel_ssc_dai.c168
-rw-r--r--sound/soc/atmel/atmel_ssc_dai.h3
-rw-r--r--sound/soc/atmel/sam9g20_wm8731.c116
9 files changed, 843 insertions, 537 deletions
diff --git a/sound/soc/atmel/Kconfig b/sound/soc/atmel/Kconfig
index 72b09cfd3dc..d1b691bf8e2 100644
--- a/sound/soc/atmel/Kconfig
+++ b/sound/soc/atmel/Kconfig
@@ -6,6 +6,14 @@ config SND_ATMEL_SOC
the ATMEL SSC interface. You will also need
to select the audio interfaces to support below.
+config SND_ATMEL_SOC_PDC
+ tristate
+ depends on SND_ATMEL_SOC
+
+config SND_ATMEL_SOC_DMA
+ tristate
+ depends on SND_ATMEL_SOC
+
config SND_ATMEL_SOC_SSC
tristate
depends on SND_ATMEL_SOC
@@ -16,8 +24,8 @@ config SND_ATMEL_SOC_SSC
config SND_AT91_SOC_SAM9G20_WM8731
tristate "SoC Audio support for WM8731-based At91sam9g20 evaluation board"
- depends on ATMEL_SSC && ARCH_AT91SAM9G20 && SND_ATMEL_SOC && \
- AT91_PROGRAMMABLE_CLOCKS
+ depends on ATMEL_SSC && SND_ATMEL_SOC && AT91_PROGRAMMABLE_CLOCKS
+ select SND_ATMEL_SOC_PDC
select SND_ATMEL_SOC_SSC
select SND_SOC_WM8731
help
@@ -27,6 +35,7 @@ config SND_AT91_SOC_SAM9G20_WM8731
config SND_AT91_SOC_AFEB9260
tristate "SoC Audio support for AFEB9260 board"
depends on ATMEL_SSC && ARCH_AT91 && MACH_AFEB9260 && SND_ATMEL_SOC
+ select SND_ATMEL_SOC_PDC
select SND_ATMEL_SOC_SSC
select SND_SOC_TLV320AIC23
help
diff --git a/sound/soc/atmel/Makefile b/sound/soc/atmel/Makefile
index a5c0bf19da7..41967ccb6f4 100644
--- a/sound/soc/atmel/Makefile
+++ b/sound/soc/atmel/Makefile
@@ -1,8 +1,12 @@
# AT91 Platform Support
snd-soc-atmel-pcm-objs := atmel-pcm.o
+snd-soc-atmel-pcm-pdc-objs := atmel-pcm-pdc.o
+snd-soc-atmel-pcm-dma-objs := atmel-pcm-dma.o
snd-soc-atmel_ssc_dai-objs := atmel_ssc_dai.o
obj-$(CONFIG_SND_ATMEL_SOC) += snd-soc-atmel-pcm.o
+obj-$(CONFIG_SND_ATMEL_SOC_PDC) += snd-soc-atmel-pcm-pdc.o
+obj-$(CONFIG_SND_ATMEL_SOC_DMA) += snd-soc-atmel-pcm-dma.o
obj-$(CONFIG_SND_ATMEL_SOC_SSC) += snd-soc-atmel_ssc_dai.o
# AT91 Machine Support
diff --git a/sound/soc/atmel/atmel-pcm-dma.c b/sound/soc/atmel/atmel-pcm-dma.c
new file mode 100644
index 00000000000..30184a4a147
--- /dev/null
+++ b/sound/soc/atmel/atmel-pcm-dma.c
@@ -0,0 +1,240 @@
+/*
+ * atmel-pcm-dma.c -- ALSA PCM DMA support for the Atmel SoC.
+ *
+ * Copyright (C) 2012 Atmel
+ *
+ * Author: Bo Shen <voice.shen@atmel.com>
+ *
+ * Based on atmel-pcm by:
+ * Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ * Copyright 2008 Atmel
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/atmel-ssc.h>
+#include <linux/platform_data/dma-atmel.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "atmel-pcm.h"
+
+/*--------------------------------------------------------------------------*\
+ * Hardware definition
+\*--------------------------------------------------------------------------*/
+static const struct snd_pcm_hardware atmel_pcm_dma_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_RESUME |
+ SNDRV_PCM_INFO_PAUSE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .period_bytes_min = 256, /* lighting DMA overhead */
+ .period_bytes_max = 2 * 0xffff, /* if 2 bytes format */
+ .periods_min = 8,
+ .periods_max = 1024, /* no limit */
+ .buffer_bytes_max = ATMEL_SSC_DMABUF_SIZE,
+};
+
+/**
+ * atmel_pcm_dma_irq: SSC interrupt handler for DMAENGINE enabled SSC
+ *
+ * We use DMAENGINE to send/receive data to/from SSC so this ISR is only to
+ * check if any overrun occured.
+ */
+static void atmel_pcm_dma_irq(u32 ssc_sr,
+ struct snd_pcm_substream *substream)
+{
+ struct atmel_pcm_dma_params *prtd;
+
+ prtd = snd_dmaengine_pcm_get_data(substream);
+
+ if (ssc_sr & prtd->mask->ssc_error) {
+ if (snd_pcm_running(substream))
+ pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x)\n",
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+ ? "underrun" : "overrun", prtd->name,
+ ssc_sr);
+
+ /* stop RX and capture: will be enabled again at restart */
+ ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_disable);
+ snd_pcm_stop(substream, SNDRV_PCM_STATE_XRUN);
+
+ /* now drain RHR and read status to remove xrun condition */
+ ssc_readx(prtd->ssc->regs, SSC_RHR);
+ ssc_readx(prtd->ssc->regs, SSC_SR);
+ }
+}
+
+/*--------------------------------------------------------------------------*\
+ * DMAENGINE operations
+\*--------------------------------------------------------------------------*/
+static bool filter(struct dma_chan *chan, void *slave)
+{
+ struct at_dma_slave *sl = slave;
+
+ if (sl->dma_dev == chan->device->dev) {
+ chan->private = sl;
+ return true;
+ } else {
+ return false;
+ }
+}
+
+static int atmel_pcm_configure_dma(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct atmel_pcm_dma_params *prtd;
+ struct ssc_device *ssc;
+ struct dma_chan *dma_chan;
+ struct dma_slave_config slave_config;
+ int ret;
+
+ prtd = snd_dmaengine_pcm_get_data(substream);
+ ssc = prtd->ssc;
+
+ ret = snd_hwparams_to_dma_slave_config(substream, params,
+ &slave_config);
+ if (ret) {
+ pr_err("atmel-pcm: hwparams to dma slave configure failed\n");
+ return ret;
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ slave_config.dst_addr = (dma_addr_t)ssc->phybase + SSC_THR;
+ slave_config.dst_maxburst = 1;
+ } else {
+ slave_config.src_addr = (dma_addr_t)ssc->phybase + SSC_RHR;
+ slave_config.src_maxburst = 1;
+ }
+
+ slave_config.device_fc = false;
+
+ dma_chan = snd_dmaengine_pcm_get_chan(substream);
+ if (dmaengine_slave_config(dma_chan, &slave_config)) {
+ pr_err("atmel-pcm: failed to configure dma channel\n");
+ ret = -EBUSY;
+ return ret;
+ }
+
+ return 0;
+}
+
+static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct atmel_pcm_dma_params *prtd;
+ struct ssc_device *ssc;
+ struct at_dma_slave *sdata = NULL;
+ int ret;
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+ prtd = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ ssc = prtd->ssc;
+ if (ssc->pdev)
+ sdata = ssc->pdev->dev.platform_data;
+
+ ret = snd_dmaengine_pcm_open(substream, filter, sdata);
+ if (ret) {
+ pr_err("atmel-pcm: dmaengine pcm open failed\n");
+ return -EINVAL;
+ }
+
+ snd_dmaengine_pcm_set_data(substream, prtd);
+
+ ret = atmel_pcm_configure_dma(substream, params);
+ if (ret) {
+ pr_err("atmel-pcm: failed to configure dmai\n");
+ goto err;
+ }
+
+ prtd->dma_intr_handler = atmel_pcm_dma_irq;
+
+ return 0;
+err:
+ snd_dmaengine_pcm_close(substream);
+ return ret;
+}
+
+static int atmel_pcm_dma_prepare(struct snd_pcm_substream *substream)
+{
+ struct atmel_pcm_dma_params *prtd;
+
+ prtd = snd_dmaengine_pcm_get_data(substream);
+
+ ssc_writex(prtd->ssc->regs, SSC_IER, prtd->mask->ssc_error);
+ ssc_writex(prtd->ssc->regs, SSC_CR, prtd->mask->ssc_enable);
+
+ return 0;
+}
+
+static int atmel_pcm_open(struct snd_pcm_substream *substream)
+{
+ snd_soc_set_runtime_hwparams(substream, &atmel_pcm_dma_hardware);
+
+ return 0;
+}
+
+static int atmel_pcm_close(struct snd_pcm_substream *substream)
+{
+ snd_dmaengine_pcm_close(substream);
+
+ return 0;
+}
+
+static struct snd_pcm_ops atmel_pcm_ops = {
+ .open = atmel_pcm_open,
+ .close = atmel_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = atmel_pcm_hw_params,
+ .prepare = atmel_pcm_dma_prepare,
+ .trigger = snd_dmaengine_pcm_trigger,
+ .pointer = snd_dmaengine_pcm_pointer_no_residue,
+ .mmap = atmel_pcm_mmap,
+};
+
+static struct snd_soc_platform_driver atmel_soc_platform = {
+ .ops = &atmel_pcm_ops,
+ .pcm_new = atmel_pcm_new,
+ .pcm_free = atmel_pcm_free,
+};
+
+int atmel_pcm_dma_platform_register(struct device *dev)
+{
+ return snd_soc_register_platform(dev, &atmel_soc_platform);
+}
+EXPORT_SYMBOL(atmel_pcm_dma_platform_register);
+
+void atmel_pcm_dma_platform_unregister(struct device *dev)
+{
+ snd_soc_unregister_platform(dev);
+}
+EXPORT_SYMBOL(atmel_pcm_dma_platform_unregister);
+
+MODULE_AUTHOR("Bo Shen <voice.shen@atmel.com>");
+MODULE_DESCRIPTION("Atmel DMA based PCM module");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-pcm-pdc.c b/sound/soc/atmel/atmel-pcm-pdc.c
new file mode 100644
index 00000000000..6a293c713a3
--- /dev/null
+++ b/sound/soc/atmel/atmel-pcm-pdc.c
@@ -0,0 +1,401 @@
+/*
+ * atmel-pcm.c -- ALSA PCM interface for the Atmel atmel SoC.
+ *
+ * Copyright (C) 2005 SAN People
+ * Copyright (C) 2008 Atmel
+ *
+ * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ *
+ * Based on at91-pcm. by:
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Copyright 2006 Endrelia Technologies Inc.
+ *
+ * Based on pxa2xx-pcm.c by:
+ *
+ * Author: Nicolas Pitre
+ * Created: Nov 30, 2004
+ * Copyright: (C) 2004 MontaVista Software, Inc.
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/atmel_pdc.h>
+#include <linux/atmel-ssc.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "atmel-pcm.h"
+
+
+/*--------------------------------------------------------------------------*\
+ * Hardware definition
+\*--------------------------------------------------------------------------*/
+/* TODO: These values were taken from the AT91 platform driver, check
+ * them against real values for AT32
+ */
+static const struct snd_pcm_hardware atmel_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_PAUSE,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .period_bytes_min = 32,
+ .period_bytes_max = 8192,
+ .periods_min = 2,
+ .periods_max = 1024,
+ .buffer_bytes_max = ATMEL_SSC_DMABUF_SIZE,
+};
+
+
+/*--------------------------------------------------------------------------*\
+ * Data types
+\*--------------------------------------------------------------------------*/
+struct atmel_runtime_data {
+ struct atmel_pcm_dma_params *params;
+ dma_addr_t dma_buffer; /* physical address of dma buffer */
+ dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
+ size_t period_size;
+
+ dma_addr_t period_ptr; /* physical address of next period */
+
+ /* PDC register save */
+ u32 pdc_xpr_save;
+ u32 pdc_xcr_save;
+ u32 pdc_xnpr_save;
+ u32 pdc_xncr_save;
+};
+
+/*--------------------------------------------------------------------------*\
+ * ISR
+\*--------------------------------------------------------------------------*/
+static void atmel_pcm_dma_irq(u32 ssc_sr,
+ struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+ static int count;
+
+ count++;
+
+ if (ssc_sr & params->mask->ssc_endbuf) {
+ pr_warn("atmel-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
+ substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+ ? "underrun" : "overrun",
+ params->name, ssc_sr, count);
+
+ /* re-start the PDC */
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_disable);
+ prtd->period_ptr += prtd->period_size;
+ if (prtd->period_ptr >= prtd->dma_buffer_end)
+ prtd->period_ptr = prtd->dma_buffer;
+
+ ssc_writex(params->ssc->regs, params->pdc->xpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xcr,
+ prtd->period_size / params->pdc_xfer_size);
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_enable);
+ }
+
+ if (ssc_sr & params->mask->ssc_endx) {
+ /* Load the PDC next pointer and counter registers */
+ prtd->period_ptr += prtd->period_size;
+ if (prtd->period_ptr >= prtd->dma_buffer_end)
+ prtd->period_ptr = prtd->dma_buffer;
+
+ ssc_writex(params->ssc->regs, params->pdc->xnpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xncr,
+ prtd->period_size / params->pdc_xfer_size);
+ }
+
+ snd_pcm_period_elapsed(substream);
+}
+
+
+/*--------------------------------------------------------------------------*\
+ * PCM operations
+\*--------------------------------------------------------------------------*/
+static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct atmel_runtime_data *prtd = runtime->private_data;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+ /* this may get called several times by oss emulation
+ * with different params */
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+ runtime->dma_bytes = params_buffer_bytes(params);
+
+ prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+ prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
+
+ prtd->dma_buffer = runtime->dma_addr;
+ prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
+ prtd->period_size = params_period_bytes(params);
+
+ pr_debug("atmel-pcm: "
+ "hw_params: DMA for %s initialized "
+ "(dma_bytes=%u, period_size=%u)\n",
+ prtd->params->name,
+ runtime->dma_bytes,
+ prtd->period_size);
+ return 0;
+}
+
+static int atmel_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+
+ if (params != NULL) {
+ ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
+ params->mask->pdc_disable);
+ prtd->params->dma_intr_handler = NULL;
+ }
+
+ return 0;
+}
+
+static int atmel_pcm_prepare(struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+
+ ssc_writex(params->ssc->regs, SSC_IDR,
+ params->mask->ssc_endx | params->mask->ssc_endbuf);
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_disable);
+ return 0;
+}
+
+static int atmel_pcm_trigger(struct snd_pcm_substream *substream,
+ int cmd)
+{
+ struct snd_pcm_runtime *rtd = substream->runtime;
+ struct atmel_runtime_data *prtd = rtd->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+ int ret = 0;
+
+ pr_debug("atmel-pcm:buffer_size = %ld,"
+ "dma_area = %p, dma_bytes = %u\n",
+ rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ prtd->period_ptr = prtd->dma_buffer;
+
+ ssc_writex(params->ssc->regs, params->pdc->xpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xcr,
+ prtd->period_size / params->pdc_xfer_size);
+
+ prtd->period_ptr += prtd->period_size;
+ ssc_writex(params->ssc->regs, params->pdc->xnpr,
+ prtd->period_ptr);
+ ssc_writex(params->ssc->regs, params->pdc->xncr,
+ prtd->period_size / params->pdc_xfer_size);
+
+ pr_debug("atmel-pcm: trigger: "
+ "period_ptr=%lx, xpr=%u, "
+ "xcr=%u, xnpr=%u, xncr=%u\n",
+ (unsigned long)prtd->period_ptr,
+ ssc_readx(params->ssc->regs, params->pdc->xpr),
+ ssc_readx(params->ssc->regs, params->pdc->xcr),
+ ssc_readx(params->ssc->regs, params->pdc->xnpr),
+ ssc_readx(params->ssc->regs, params->pdc->xncr));
+
+ ssc_writex(params->ssc->regs, SSC_IER,
+ params->mask->ssc_endx | params->mask->ssc_endbuf);
+ ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
+ params->mask->pdc_enable);
+
+ pr_debug("sr=%u imr=%u\n",
+ ssc_readx(params->ssc->regs, SSC_SR),
+ ssc_readx(params->ssc->regs, SSC_IER));
+ break; /* SNDRV_PCM_TRIGGER_START */
+
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_disable);
+ break;
+
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
+ params->mask->pdc_enable);
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static snd_pcm_uframes_t atmel_pcm_pointer(
+ struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct atmel_runtime_data *prtd = runtime->private_data;
+ struct atmel_pcm_dma_params *params = prtd->params;
+ dma_addr_t ptr;
+ snd_pcm_uframes_t x;
+
+ ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
+ x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
+
+ if (x == runtime->buffer_size)
+ x = 0;
+
+ return x;
+}
+
+static int atmel_pcm_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct atmel_runtime_data *prtd;
+ int ret = 0;
+
+ snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
+
+ /* ensure that buffer size is a multiple of period size */
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0)
+ goto out;
+
+ prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
+ if (prtd == NULL) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ runtime->private_data = prtd;
+
+ out:
+ return ret;
+}
+
+static int atmel_pcm_close(struct snd_pcm_substream *substream)
+{
+ struct atmel_runtime_data *prtd = substream->runtime->private_data;
+
+ kfree(prtd);
+ return 0;
+}
+
+static struct snd_pcm_ops atmel_pcm_ops = {
+ .open = atmel_pcm_open,
+ .close = atmel_pcm_close,
+ .ioctl = snd_pcm_lib_ioctl,
+ .hw_params = atmel_pcm_hw_params,
+ .hw_free = atmel_pcm_hw_free,
+ .prepare = atmel_pcm_prepare,
+ .trigger = atmel_pcm_trigger,
+ .pointer = atmel_pcm_pointer,
+ .mmap = atmel_pcm_mmap,
+};
+
+
+/*--------------------------------------------------------------------------*\
+ * ASoC platform driver
+\*--------------------------------------------------------------------------*/
+#ifdef CONFIG_PM
+static int atmel_pcm_suspend(struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = dai->runtime;
+ struct atmel_runtime_data *prtd;
+ struct atmel_pcm_dma_params *params;
+
+ if (!runtime)
+ return 0;
+
+ prtd = runtime->private_data;
+ params = prtd->params;
+
+ /* disable the PDC and save the PDC registers */
+
+ ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
+
+ prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
+ prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
+ prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr);
+ prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr);
+
+ return 0;
+}
+
+static int atmel_pcm_resume(struct snd_soc_dai *dai)
+{
+ struct snd_pcm_runtime *runtime = dai->runtime;
+ struct atmel_runtime_data *prtd;
+ struct atmel_pcm_dma_params *params;
+
+ if (!runtime)
+ return 0;
+
+ prtd = runtime->private_data;
+ params = prtd->params;
+
+ /* restore the PDC registers and enable the PDC */
+ ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
+ ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
+ ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
+ ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
+
+ ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
+ return 0;
+}
+#else
+#define atmel_pcm_suspend NULL
+#define atmel_pcm_resume NULL
+#endif
+
+static struct snd_soc_platform_driver atmel_soc_platform = {
+ .ops = &atmel_pcm_ops,
+ .pcm_new = atmel_pcm_new,
+ .pcm_free = atmel_pcm_free,
+ .suspend = atmel_pcm_suspend,
+ .resume = atmel_pcm_resume,
+};
+
+int atmel_pcm_pdc_platform_register(struct device *dev)
+{
+ return snd_soc_register_platform(dev, &atmel_soc_platform);
+}
+EXPORT_SYMBOL(atmel_pcm_pdc_platform_register);
+
+void atmel_pcm_pdc_platform_unregister(struct device *dev)
+{
+ snd_soc_unregister_platform(dev);
+}
+EXPORT_SYMBOL(atmel_pcm_pdc_platform_unregister);
+
+MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
+MODULE_DESCRIPTION("Atmel PCM module");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-pcm.c b/sound/soc/atmel/atmel-pcm.c
index 9b84f985770..e99f1811300 100644
--- a/sound/soc/atmel/atmel-pcm.c
+++ b/sound/soc/atmel/atmel-pcm.c
@@ -32,80 +32,25 @@
*/
#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
#include <linux/dma-mapping.h>
-#include <linux/atmel_pdc.h>
-#include <linux/atmel-ssc.h>
-
-#include <sound/core.h>
#include <sound/pcm.h>
-#include <sound/pcm_params.h>
#include <sound/soc.h>
-
#include "atmel-pcm.h"
-
-/*--------------------------------------------------------------------------*\
- * Hardware definition
-\*--------------------------------------------------------------------------*/
-/* TODO: These values were taken from the AT91 platform driver, check
- * them against real values for AT32
- */
-static const struct snd_pcm_hardware atmel_pcm_hardware = {
- .info = SNDRV_PCM_INFO_MMAP |
- SNDRV_PCM_INFO_MMAP_VALID |
- SNDRV_PCM_INFO_INTERLEAVED |
- SNDRV_PCM_INFO_PAUSE,
- .formats = SNDRV_PCM_FMTBIT_S16_LE,
- .period_bytes_min = 32,
- .period_bytes_max = 8192,
- .periods_min = 2,
- .periods_max = 1024,
- .buffer_bytes_max = 32 * 1024,
-};
-
-
-/*--------------------------------------------------------------------------*\
- * Data types
-\*--------------------------------------------------------------------------*/
-struct atmel_runtime_data {
- struct atmel_pcm_dma_params *params;
- dma_addr_t dma_buffer; /* physical address of dma buffer */
- dma_addr_t dma_buffer_end; /* first address beyond DMA buffer */
- size_t period_size;
-
- dma_addr_t period_ptr; /* physical address of next period */
-
- /* PDC register save */
- u32 pdc_xpr_save;
- u32 pdc_xcr_save;
- u32 pdc_xnpr_save;
- u32 pdc_xncr_save;
-};
-
-
-/*--------------------------------------------------------------------------*\
- * Helper functions
-\*--------------------------------------------------------------------------*/
static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
int stream)
{
struct snd_pcm_substream *substream = pcm->streams[stream].substream;
struct snd_dma_buffer *buf = &substream->dma_buffer;
- size_t size = atmel_pcm_hardware.buffer_bytes_max;
+ size_t size = ATMEL_SSC_DMABUF_SIZE;
buf->dev.type = SNDRV_DMA_TYPE_DEV;
buf->dev.dev = pcm->card->dev;
buf->private_data = NULL;
buf->area = dma_alloc_coherent(pcm->card->dev, size,
- &buf->addr, GFP_KERNEL);
- pr_debug("atmel-pcm:"
- "preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
- (void *) buf->area,
- (void *) buf->addr,
- size);
+ &buf->addr, GFP_KERNEL);
+ pr_debug("atmel-pcm: alloc dma buffer: area=%p, addr=%p, size=%d\n",
+ (void *)buf->area, (void *)buf->addr, size);
if (!buf->area)
return -ENOMEM;
@@ -113,258 +58,19 @@ static int atmel_pcm_preallocate_dma_buffer(struct snd_pcm *pcm,
buf->bytes = size;
return 0;
}
-/*--------------------------------------------------------------------------*\
- * ISR
-\*--------------------------------------------------------------------------*/
-static void atmel_pcm_dma_irq(u32 ssc_sr,
- struct snd_pcm_substream *substream)
-{
- struct atmel_runtime_data *prtd = substream->runtime->private_data;
- struct atmel_pcm_dma_params *params = prtd->params;
- static int count;
-
- count++;
-
- if (ssc_sr & params->mask->ssc_endbuf) {
- pr_warning("atmel-pcm: buffer %s on %s"
- " (SSC_SR=%#x, count=%d)\n",
- substream->stream == SNDRV_PCM_STREAM_PLAYBACK
- ? "underrun" : "overrun",
- params->name, ssc_sr, count);
-
- /* re-start the PDC */
- ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
- params->mask->pdc_disable);
- prtd->period_ptr += prtd->period_size;
- if (prtd->period_ptr >= prtd->dma_buffer_end)
- prtd->period_ptr = prtd->dma_buffer;
-
- ssc_writex(params->ssc->regs, params->pdc->xpr,
- prtd->period_ptr);
- ssc_writex(params->ssc->regs, params->pdc->xcr,
- prtd->period_size / params->pdc_xfer_size);
- ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
- params->mask->pdc_enable);
- }
-
- if (ssc_sr & params->mask->ssc_endx) {
- /* Load the PDC next pointer and counter registers */
- prtd->period_ptr += prtd->period_size;
- if (prtd->period_ptr >= prtd->dma_buffer_end)
- prtd->period_ptr = prtd->dma_buffer;
-
- ssc_writex(params->ssc->regs, params->pdc->xnpr,
- prtd->period_ptr);
- ssc_writex(params->ssc->regs, params->pdc->xncr,
- prtd->period_size / params->pdc_xfer_size);
- }
-
- snd_pcm_period_elapsed(substream);
-}
-
-
-/*--------------------------------------------------------------------------*\
- * PCM operations
-\*--------------------------------------------------------------------------*/
-static int atmel_pcm_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct atmel_runtime_data *prtd = runtime->private_data;
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
-
- /* this may get called several times by oss emulation
- * with different params */
-
- snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
- runtime->dma_bytes = params_buffer_bytes(params);
-
- prtd->params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
- prtd->params->dma_intr_handler = atmel_pcm_dma_irq;
-
- prtd->dma_buffer = runtime->dma_addr;
- prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
- prtd->period_size = params_period_bytes(params);
-
- pr_debug("atmel-pcm: "
- "hw_params: DMA for %s initialized "
- "(dma_bytes=%u, period_size=%u)\n",
- prtd->params->name,
- runtime->dma_bytes,
- prtd->period_size);
- return 0;
-}
-
-static int atmel_pcm_hw_free(struct snd_pcm_substream *substream)
-{
- struct atmel_runtime_data *prtd = substream->runtime->private_data;
- struct atmel_pcm_dma_params *params = prtd->params;
-
- if (params != NULL) {
- ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
- params->mask->pdc_disable);
- prtd->params->dma_intr_handler = NULL;
- }
-
- return 0;
-}
-
-static int atmel_pcm_prepare(struct snd_pcm_substream *substream)
-{
- struct atmel_runtime_data *prtd = substream->runtime->private_data;
- struct atmel_pcm_dma_params *params = prtd->params;
-
- ssc_writex(params->ssc->regs, SSC_IDR,
- params->mask->ssc_endx | params->mask->ssc_endbuf);
- ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
- params->mask->pdc_disable);
- return 0;
-}
-
-static int atmel_pcm_trigger(struct snd_pcm_substream *substream,
- int cmd)
-{
- struct snd_pcm_runtime *rtd = substream->runtime;
- struct atmel_runtime_data *prtd = rtd->private_data;
- struct atmel_pcm_dma_params *params = prtd->params;
- int ret = 0;
-
- pr_debug("atmel-pcm:buffer_size = %ld,"
- "dma_area = %p, dma_bytes = %u\n",
- rtd->buffer_size, rtd->dma_area, rtd->dma_bytes);
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- prtd->period_ptr = prtd->dma_buffer;
-
- ssc_writex(params->ssc->regs, params->pdc->xpr,
- prtd->period_ptr);
- ssc_writex(params->ssc->regs, params->pdc->xcr,
- prtd->period_size / params->pdc_xfer_size);
-
- prtd->period_ptr += prtd->period_size;
- ssc_writex(params->ssc->regs, params->pdc->xnpr,
- prtd->period_ptr);
- ssc_writex(params->ssc->regs, params->pdc->xncr,
- prtd->period_size / params->pdc_xfer_size);
-
- pr_debug("atmel-pcm: trigger: "
- "period_ptr=%lx, xpr=%u, "
- "xcr=%u, xnpr=%u, xncr=%u\n",
- (unsigned long)prtd->period_ptr,
- ssc_readx(params->ssc->regs, params->pdc->xpr),
- ssc_readx(params->ssc->regs, params->pdc->xcr),
- ssc_readx(params->ssc->regs, params->pdc->xnpr),
- ssc_readx(params->ssc->regs, params->pdc->xncr));
-
- ssc_writex(params->ssc->regs, SSC_IER,
- params->mask->ssc_endx | params->mask->ssc_endbuf);
- ssc_writex(params->ssc->regs, SSC_PDC_PTCR,
- params->mask->pdc_enable);
-
- pr_debug("sr=%u imr=%u\n",
- ssc_readx(params->ssc->regs, SSC_SR),
- ssc_readx(params->ssc->regs, SSC_IER));
- break; /* SNDRV_PCM_TRIGGER_START */
-
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
- params->mask->pdc_disable);
- break;
-
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- ssc_writex(params->ssc->regs, ATMEL_PDC_PTCR,
- params->mask->pdc_enable);
- break;
-
- default:
- ret = -EINVAL;
- }
- return ret;
-}
-
-static snd_pcm_uframes_t atmel_pcm_pointer(
- struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct atmel_runtime_data *prtd = runtime->private_data;
- struct atmel_pcm_dma_params *params = prtd->params;
- dma_addr_t ptr;
- snd_pcm_uframes_t x;
-
- ptr = (dma_addr_t) ssc_readx(params->ssc->regs, params->pdc->xpr);
- x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
-
- if (x == runtime->buffer_size)
- x = 0;
-
- return x;
-}
-
-static int atmel_pcm_open(struct snd_pcm_substream *substream)
-{
- struct snd_pcm_runtime *runtime = substream->runtime;
- struct atmel_runtime_data *prtd;
- int ret = 0;
-
- snd_soc_set_runtime_hwparams(substream, &atmel_pcm_hardware);
-
- /* ensure that buffer size is a multiple of period size */
- ret = snd_pcm_hw_constraint_integer(runtime,
- SNDRV_PCM_HW_PARAM_PERIODS);
- if (ret < 0)
- goto out;
-
- prtd = kzalloc(sizeof(struct atmel_runtime_data), GFP_KERNEL);
- if (prtd == NULL) {
- ret = -ENOMEM;
- goto out;
- }
- runtime->private_data = prtd;
-
- out:
- return ret;
-}
-
-static int atmel_pcm_close(struct snd_pcm_substream *substream)
-{
- struct atmel_runtime_data *prtd = substream->runtime->private_data;
-
- kfree(prtd);
- return 0;
-}
-
-static int atmel_pcm_mmap(struct snd_pcm_substream *substream,
+int atmel_pcm_mmap(struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
return remap_pfn_range(vma, vma->vm_start,
substream->dma_buffer.addr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
}
+EXPORT_SYMBOL_GPL(atmel_pcm_mmap);
-static struct snd_pcm_ops atmel_pcm_ops = {
- .open = atmel_pcm_open,
- .close = atmel_pcm_close,
- .ioctl = snd_pcm_lib_ioctl,
- .hw_params = atmel_pcm_hw_params,
- .hw_free = atmel_pcm_hw_free,
- .prepare = atmel_pcm_prepare,
- .trigger = atmel_pcm_trigger,
- .pointer = atmel_pcm_pointer,
- .mmap = atmel_pcm_mmap,
-};
-
-
-/*--------------------------------------------------------------------------*\
- * ASoC platform driver
-\*--------------------------------------------------------------------------*/
static u64 atmel_pcm_dmamask = DMA_BIT_MASK(32);
-static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
+int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
{
struct snd_card *card = rtd->card->snd_card;
struct snd_pcm *pcm = rtd->pcm;
@@ -376,6 +82,7 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
+ pr_debug("atmel-pcm: allocating PCM playback DMA buffer\n");
ret = atmel_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_PLAYBACK);
if (ret)
@@ -383,8 +90,7 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
}
if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
- pr_debug("atmel-pcm:"
- "Allocating PCM capture DMA buffer\n");
+ pr_debug("atmel-pcm: allocating PCM capture DMA buffer\n");
ret = atmel_pcm_preallocate_dma_buffer(pcm,
SNDRV_PCM_STREAM_CAPTURE);
if (ret)
@@ -393,8 +99,9 @@ static int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd)
out:
return ret;
}
+EXPORT_SYMBOL_GPL(atmel_pcm_new);
-static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm)
+void atmel_pcm_free(struct snd_pcm *pcm)
{
struct snd_pcm_substream *substream;
struct snd_dma_buffer *buf;
@@ -413,89 +120,5 @@ static void atmel_pcm_free_dma_buffers(struct snd_pcm *pcm)
buf->area = NULL;
}
}
+EXPORT_SYMBOL_GPL(atmel_pcm_free);
-#ifdef CONFIG_PM
-static int atmel_pcm_suspend(struct snd_soc_dai *dai)
-{
- struct snd_pcm_runtime *runtime = dai->runtime;
- struct atmel_runtime_data *prtd;
- struct atmel_pcm_dma_params *params;
-
- if (!runtime)
- return 0;
-
- prtd = runtime->private_data;
- params = prtd->params;
-
- /* disable the PDC and save the PDC registers */
-
- ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
-
- prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
- prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
- prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr);
- prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr);
-
- return 0;
-}
-
-static int atmel_pcm_resume(struct snd_soc_dai *dai)
-{
- struct snd_pcm_runtime *runtime = dai->runtime;
- struct atmel_runtime_data *prtd;
- struct atmel_pcm_dma_params *params;
-
- if (!runtime)
- return 0;
-
- prtd = runtime->private_data;
- params = prtd->params;
-
- /* restore the PDC registers and enable the PDC */
- ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
- ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
- ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
- ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
-
- ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
- return 0;
-}
-#else
-#define atmel_pcm_suspend NULL
-#define atmel_pcm_resume NULL
-#endif
-
-static struct snd_soc_platform_driver atmel_soc_platform = {
- .ops = &atmel_pcm_ops,
- .pcm_new = atmel_pcm_new,
- .pcm_free = atmel_pcm_free_dma_buffers,
- .suspend = atmel_pcm_suspend,
- .resume = atmel_pcm_resume,
-};
-
-static int __devinit atmel_soc_platform_probe(struct platform_device *pdev)
-{
- return snd_soc_register_platform(&pdev->dev, &atmel_soc_platform);
-}
-
-static int __devexit atmel_soc_platform_remove(struct platform_device *pdev)
-{
- snd_soc_unregister_platform(&pdev->dev);
- return 0;
-}
-
-static struct platform_driver atmel_pcm_driver = {
- .driver = {
- .name = "atmel-pcm-audio",
- .owner = THIS_MODULE,
- },
-
- .probe = atmel_soc_platform_probe,
- .remove = __devexit_p(atmel_soc_platform_remove),
-};
-
-module_platform_driver(atmel_pcm_driver);
-
-MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
-MODULE_DESCRIPTION("Atmel PCM module");
-MODULE_LICENSE("GPL");
diff --git a/sound/soc/atmel/atmel-pcm.h b/sound/soc/atmel/atmel-pcm.h
index 5e0a95e6432..bb45d20e725 100644
--- a/sound/soc/atmel/atmel-pcm.h
+++ b/sound/soc/atmel/atmel-pcm.h
@@ -36,6 +36,8 @@
#include <linux/atmel-ssc.h>
+#define ATMEL_SSC_DMABUF_SIZE (64 * 1024)
+
/*
* Registers and status bits that are required by the PCM driver.
*/
@@ -50,6 +52,7 @@ struct atmel_pdc_regs {
struct atmel_ssc_mask {
u32 ssc_enable; /* SSC recv/trans enable */
u32 ssc_disable; /* SSC recv/trans disable */
+ u32 ssc_error; /* SSC error conditions */
u32 ssc_endx; /* SSC ENDTX or ENDRX */
u32 ssc_endbuf; /* SSC TXBUFE or RXBUFF */
u32 pdc_enable; /* PDC recv/trans enable */
@@ -80,4 +83,35 @@ struct atmel_pcm_dma_params {
#define ssc_readx(base, reg) (__raw_readl((base) + (reg)))
#define ssc_writex(base, reg, value) __raw_writel((value), (base) + (reg))
+int atmel_pcm_new(struct snd_soc_pcm_runtime *rtd);
+void atmel_pcm_free(struct snd_pcm *pcm);
+int atmel_pcm_mmap(struct snd_pcm_substream *substream,
+ struct vm_area_struct *vma);
+
+#ifdef CONFIG_SND_ATMEL_SOC_PDC
+int atmel_pcm_pdc_platform_register(struct device *dev);
+void atmel_pcm_pdc_platform_unregister(struct device *dev);
+#else
+static inline int atmel_pcm_pdc_platform_register(struct device *dev)
+{
+ return 0;
+}
+static inline void atmel_pcm_pdc_platform_unregister(struct device *dev)
+{
+}
+#endif
+
+#ifdef CONFIG_SND_ATMEL_SOC_DMA
+int atmel_pcm_dma_platform_register(struct device *dev);
+void atmel_pcm_dma_platform_unregister(struct device *dev);
+#else
+static inline int atmel_pcm_dma_platform_register(struct device *dev)
+{
+ return 0;
+}
+static inline void atmel_pcm_dma_platform_unregister(struct device *dev)
+{
+}
+#endif
+
#endif /* _ATMEL_PCM_H */
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index 354341ec0f4..1c766342205 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -48,11 +48,7 @@
#include "atmel_ssc_dai.h"
-#if defined(CONFIG_ARCH_AT91SAM9260) || defined(CONFIG_ARCH_AT91SAM9G20)
-#define NUM_SSC_DEVICES 1
-#else
#define NUM_SSC_DEVICES 3
-#endif
/*
* SSC PDC registers required by the PCM DMA engine.
@@ -107,7 +103,6 @@ static struct atmel_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
} },
-#if NUM_SSC_DEVICES == 3
{{
.name = "SSC1 PCM out",
.pdc = &pdc_tx_reg,
@@ -128,7 +123,6 @@ static struct atmel_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
.pdc = &pdc_rx_reg,
.mask = &ssc_rx_mask,
} },
-#endif
};
@@ -139,7 +133,6 @@ static struct atmel_ssc_info ssc_info[NUM_SSC_DEVICES] = {
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
-#if NUM_SSC_DEVICES == 3
{
.name = "ssc1",
.lock = __SPIN_LOCK_UNLOCKED(ssc_info[1].lock),
@@ -152,7 +145,6 @@ static struct atmel_ssc_info ssc_info[NUM_SSC_DEVICES] = {
.dir_mask = SSC_DIR_MASK_UNUSED,
.initialized = 0,
},
-#endif
};
@@ -690,27 +682,9 @@ static int atmel_ssc_resume(struct snd_soc_dai *cpu_dai)
static int atmel_ssc_probe(struct snd_soc_dai *dai)
{
struct atmel_ssc_info *ssc_p = &ssc_info[dai->id];
- int ret = 0;
snd_soc_dai_set_drvdata(dai, ssc_p);
- /*
- * Request SSC device
- */
- ssc_p->ssc = ssc_request(dai->id);
- if (IS_ERR(ssc_p->ssc)) {
- printk(KERN_ERR "ASoC: Failed to request SSC %d\n", dai->id);
- ret = PTR_ERR(ssc_p->ssc);
- }
-
- return ret;
-}
-
-static int atmel_ssc_remove(struct snd_soc_dai *dai)
-{
- struct atmel_ssc_info *ssc_p = snd_soc_dai_get_drvdata(dai);
-
- ssc_free(ssc_p->ssc);
return 0;
}
@@ -728,30 +702,8 @@ static const struct snd_soc_dai_ops atmel_ssc_dai_ops = {
.set_clkdiv = atmel_ssc_set_dai_clkdiv,
};
-static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {
- {
- .name = "atmel-ssc-dai.0",
- .probe = atmel_ssc_probe,
- .remove = atmel_ssc_remove,
- .suspend = atmel_ssc_suspend,
- .resume = atmel_ssc_resume,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .ops = &atmel_ssc_dai_ops,
- },
-#if NUM_SSC_DEVICES == 3
- {
- .name = "atmel-ssc-dai.1",
+static struct snd_soc_dai_driver atmel_ssc_dai = {
.probe = atmel_ssc_probe,
- .remove = atmel_ssc_remove,
.suspend = atmel_ssc_suspend,
.resume = atmel_ssc_resume,
.playback = {
@@ -765,50 +717,50 @@ static struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = {
.rates = ATMEL_SSC_RATES,
.formats = ATMEL_SSC_FORMATS,},
.ops = &atmel_ssc_dai_ops,
- },
- {
- .name = "atmel-ssc-dai.2",
- .probe = atmel_ssc_probe,
- .remove = atmel_ssc_remove,
- .suspend = atmel_ssc_suspend,
- .resume = atmel_ssc_resume,
- .playback = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = ATMEL_SSC_RATES,
- .formats = ATMEL_SSC_FORMATS,},
- .ops = &atmel_ssc_dai_ops,
- },
-#endif
};
-static __devinit int asoc_ssc_probe(struct platform_device *pdev)
+static int asoc_ssc_init(struct device *dev)
{
- BUG_ON(pdev->id < 0);
- BUG_ON(pdev->id >= ARRAY_SIZE(atmel_ssc_dai));
- return snd_soc_register_dai(&pdev->dev, &atmel_ssc_dai[pdev->id]);
-}
+ struct platform_device *pdev = to_platform_device(dev);
+ struct ssc_device *ssc = platform_get_drvdata(pdev);
+ int ret;
+
+ ret = snd_soc_register_dai(dev, &atmel_ssc_dai);
+ if (ret) {
+ dev_err(dev, "Could not register DAI: %d\n", ret);
+ goto err;
+ }
+
+ if (ssc->pdata->use_dma)
+ ret = atmel_pcm_dma_platform_register(dev);
+ else
+ ret = atmel_pcm_pdc_platform_register(dev);
+
+ if (ret) {
+ dev_err(dev, "Could not register PCM: %d\n", ret);
+ goto err_unregister_dai;
+ };
-static int __devexit asoc_ssc_remove(struct platform_device *pdev)
-{
- snd_soc_unregister_dai(&pdev->dev);
return 0;
+
+err_unregister_dai:
+ snd_soc_unregister_dai(dev);
+err:
+ return ret;
}
-static struct platform_driver asoc_ssc_driver = {
- .driver = {
- .name = "atmel-ssc-dai",
- .owner = THIS_MODULE,
- },
+static void asoc_ssc_exit(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct ssc_device *ssc = platform_get_drvdata(pdev);
- .probe = asoc_ssc_probe,
- .remove = __devexit_p(asoc_ssc_remove),
-};
+ if (ssc->pdata->use_dma)
+ atmel_pcm_dma_platform_unregister(dev);
+ else
+ atmel_pcm_pdc_platform_unregister(dev);
+
+ snd_soc_unregister_dai(dev);
+}
/**
* atmel_ssc_set_audio - Allocate the specified SSC for audio use.
@@ -816,50 +768,32 @@ static struct platform_driver asoc_ssc_driver = {
int atmel_ssc_set_audio(int ssc_id)
{
struct ssc_device *ssc;
- static struct platform_device *dma_pdev;
- struct platform_device *ssc_pdev;
int ret;
- if (ssc_id < 0 || ssc_id >= ARRAY_SIZE(atmel_ssc_dai))
- return -EINVAL;
-
- /* Allocate a dummy device for DMA if we don't have one already */
- if (!dma_pdev) {
- dma_pdev = platform_device_alloc("atmel-pcm-audio", -1);
- if (!dma_pdev)
- return -ENOMEM;
-
- ret = platform_device_add(dma_pdev);
- if (ret < 0) {
- platform_device_put(dma_pdev);
- dma_pdev = NULL;
- return ret;
- }
- }
-
- ssc_pdev = platform_device_alloc("atmel-ssc-dai", ssc_id);
- if (!ssc_pdev)
- return -ENOMEM;
-
/* If we can grab the SSC briefly to parent the DAI device off it */
ssc = ssc_request(ssc_id);
- if (IS_ERR(ssc))
- pr_warn("Unable to parent ASoC SSC DAI on SSC: %ld\n",
+ if (IS_ERR(ssc)) {
+ pr_err("Unable to parent ASoC SSC DAI on SSC: %ld\n",
PTR_ERR(ssc));
- else {
- ssc_pdev->dev.parent = &(ssc->pdev->dev);
- ssc_free(ssc);
+ return PTR_ERR(ssc);
+ } else {
+ ssc_info[ssc_id].ssc = ssc;
}
- ret = platform_device_add(ssc_pdev);
- if (ret < 0)
- platform_device_put(ssc_pdev);
+ ret = asoc_ssc_init(&ssc->pdev->dev);
return ret;
}
EXPORT_SYMBOL_GPL(atmel_ssc_set_audio);
-module_platform_driver(asoc_ssc_driver);
+void atmel_ssc_put_audio(int ssc_id)
+{
+ struct ssc_device *ssc = ssc_info[ssc_id].ssc;
+
+ ssc_free(ssc);
+ asoc_ssc_exit(&ssc->pdev->dev);
+}
+EXPORT_SYMBOL_GPL(atmel_ssc_put_audio);
/* Module information */
MODULE_AUTHOR("Sedji Gaouaou, sedji.gaouaou@atmel.com, www.atmel.com");
diff --git a/sound/soc/atmel/atmel_ssc_dai.h b/sound/soc/atmel/atmel_ssc_dai.h
index 5d4f0f9b4d9..b1f08d51149 100644
--- a/sound/soc/atmel/atmel_ssc_dai.h
+++ b/sound/soc/atmel/atmel_ssc_dai.h
@@ -117,6 +117,7 @@ struct atmel_ssc_info {
struct atmel_ssc_state ssc_state;
};
-int atmel_ssc_set_audio(int ssc);
+int atmel_ssc_set_audio(int ssc_id);
+void atmel_ssc_put_audio(int ssc_id);
#endif /* _AT91_SSC_DAI_H */
diff --git a/sound/soc/atmel/sam9g20_wm8731.c b/sound/soc/atmel/sam9g20_wm8731.c
index c88351488f4..da976291da9 100644
--- a/sound/soc/atmel/sam9g20_wm8731.c
+++ b/sound/soc/atmel/sam9g20_wm8731.c
@@ -38,6 +38,8 @@
#include <linux/platform_device.h>
#include <linux/i2c.h>
+#include <linux/pinctrl/consumer.h>
+
#include <linux/atmel-ssc.h>
#include <sound/core.h>
@@ -179,10 +181,10 @@ static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
static struct snd_soc_dai_link at91sam9g20ek_dai = {
.name = "WM8731",
.stream_name = "WM8731 PCM",
- .cpu_dai_name = "atmel-ssc-dai.0",
+ .cpu_dai_name = "at91rm9200_ssc.0",
.codec_dai_name = "wm8731-hifi",
.init = at91sam9g20ek_wm8731_init,
- .platform_name = "atmel-pcm-audio",
+ .platform_name = "at91rm9200_ssc.0",
.codec_name = "wm8731.0-001b",
.ops = &at91sam9g20ek_ops,
};
@@ -195,20 +197,31 @@ static struct snd_soc_card snd_soc_at91sam9g20ek = {
.set_bias_level = at91sam9g20ek_set_bias_level,
};
-static struct platform_device *at91sam9g20ek_snd_device;
-
-static int __init at91sam9g20ek_init(void)
+static int at91sam9g20ek_audio_probe(struct platform_device *pdev)
{
+ struct device_node *np = pdev->dev.of_node;
+ struct device_node *codec_np, *cpu_np;
struct clk *pllb;
+ struct snd_soc_card *card = &snd_soc_at91sam9g20ek;
+ struct pinctrl *pinctrl;
int ret;
- if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
- return -ENODEV;
+ pinctrl = devm_pinctrl_get_select_default(&pdev->dev);
+ if (IS_ERR(pinctrl)) {
+ dev_err(&pdev->dev, "Failed to request pinctrl for mck\n");
+ return PTR_ERR(pinctrl);
+ }
+
+ if (!np) {
+ if (!(machine_is_at91sam9g20ek() ||
+ machine_is_at91sam9g20ek_2mmc()))
+ return -ENODEV;
+ }
ret = atmel_ssc_set_audio(0);
- if (ret != 0) {
- pr_err("Failed to set SSC 0 for audio: %d\n", ret);
- return ret;
+ if (ret) {
+ dev_err(&pdev->dev, "ssc channel is not valid\n");
+ return -EINVAL;
}
/*
@@ -236,45 +249,92 @@ static int __init at91sam9g20ek_init(void)
clk_set_rate(mclk, MCLK_RATE);
- at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
- if (!at91sam9g20ek_snd_device) {
- printk(KERN_ERR "ASoC: Platform device allocation failed\n");
- ret = -ENOMEM;
- goto err_mclk;
+ card->dev = &pdev->dev;
+
+ /* Parse device node info */
+ if (np) {
+ ret = snd_soc_of_parse_card_name(card, "atmel,model");
+ if (ret)
+ goto err;
+
+ ret = snd_soc_of_parse_audio_routing(card,
+ "atmel,audio-routing");
+ if (ret)
+ goto err;
+
+ /* Parse codec info */
+ at91sam9g20ek_dai.codec_name = NULL;
+ codec_np = of_parse_phandle(np, "atmel,audio-codec", 0);
+ if (!codec_np) {
+ dev_err(&pdev->dev, "codec info missing\n");
+ return -EINVAL;
+ }
+ at91sam9g20ek_dai.codec_of_node = codec_np;
+
+ /* Parse dai and platform info */
+ at91sam9g20ek_dai.cpu_dai_name = NULL;
+ at91sam9g20ek_dai.platform_name = NULL;
+ cpu_np = of_parse_phandle(np, "atmel,ssc-controller", 0);
+ if (!cpu_np) {
+ dev_err(&pdev->dev, "dai and pcm info missing\n");
+ return -EINVAL;
+ }
+ at91sam9g20ek_dai.cpu_of_node = cpu_np;
+ at91sam9g20ek_dai.platform_of_node = cpu_np;
+
+ of_node_put(codec_np);
+ of_node_put(cpu_np);
}
- platform_set_drvdata(at91sam9g20ek_snd_device,
- &snd_soc_at91sam9g20ek);
-
- ret = platform_device_add(at91sam9g20ek_snd_device);
+ ret = snd_soc_register_card(card);
if (ret) {
- printk(KERN_ERR "ASoC: Platform device allocation failed\n");
- goto err_device_add;
+ printk(KERN_ERR "ASoC: snd_soc_register_card() failed\n");
}
return ret;
-err_device_add:
- platform_device_put(at91sam9g20ek_snd_device);
err_mclk:
clk_put(mclk);
mclk = NULL;
err:
+ atmel_ssc_put_audio(0);
return ret;
}
-static void __exit at91sam9g20ek_exit(void)
+static int at91sam9g20ek_audio_remove(struct platform_device *pdev)
{
- platform_device_unregister(at91sam9g20ek_snd_device);
- at91sam9g20ek_snd_device = NULL;
+ struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+ atmel_ssc_put_audio(0);
+ snd_soc_unregister_card(card);
clk_put(mclk);
mclk = NULL;
+
+ return 0;
}
-module_init(at91sam9g20ek_init);
-module_exit(at91sam9g20ek_exit);
+#ifdef CONFIG_OF
+static const struct of_device_id at91sam9g20ek_wm8731_dt_ids[] = {
+ { .compatible = "atmel,at91sam9g20ek-wm8731-audio", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, at91sam9g20ek_wm8731_dt_ids);
+#endif
+
+static struct platform_driver at91sam9g20ek_audio_driver = {
+ .driver = {
+ .name = "at91sam9g20ek-audio",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(at91sam9g20ek_wm8731_dt_ids),
+ },
+ .probe = at91sam9g20ek_audio_probe,
+ .remove = at91sam9g20ek_audio_remove,
+};
+
+module_platform_driver(at91sam9g20ek_audio_driver);
/* Module information */
MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
+MODULE_ALIAS("platform:at91sam9g20ek-audio");
MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-22 13:50:16 +0000