[alsa-devel] [PATCH 5/5] ASoC: DaVinci: pcm, fix underruns by using sram
Troy Kisky
troy.kisky at boundarydevices.com
Fri Aug 7 01:55:35 CEST 2009
Fix underruns by using dma to copy 1st to sram
in a ping/pong buffer style and then copying from
the sram to the ASP. This also has the advantage
of tolerating very long interrupt latency on dma
completion.
Signed-off-by: Troy Kisky <troy.kisky at boundarydevices.com>
---
arch/arm/mach-davinci/include/mach/asp.h | 2 +
sound/soc/davinci/davinci-i2s.c | 5 +-
sound/soc/davinci/davinci-pcm.c | 471 +++++++++++++++++++++++++++---
sound/soc/davinci/davinci-pcm.h | 1 +
4 files changed, 435 insertions(+), 44 deletions(-)
diff --git a/arch/arm/mach-davinci/include/mach/asp.h b/arch/arm/mach-davinci/include/mach/asp.h
index 73b60b6..0fdbf45 100644
--- a/arch/arm/mach-davinci/include/mach/asp.h
+++ b/arch/arm/mach-davinci/include/mach/asp.h
@@ -43,6 +43,8 @@ struct snd_platform_data {
* when compared to previous behavior.
*/
unsigned disable_channel_combine:1;
+ unsigned sram_size_playback;
+ unsigned sram_size_capture;
/* McASP specific fields */
int tdm_slots;
diff --git a/sound/soc/davinci/davinci-i2s.c b/sound/soc/davinci/davinci-i2s.c
index 9587e00..129684d 100644
--- a/sound/soc/davinci/davinci-i2s.c
+++ b/sound/soc/davinci/davinci-i2s.c
@@ -559,8 +559,11 @@ static int davinci_i2s_probe(struct platform_device *pdev)
ret = -ENOMEM;
goto err_release_region;
}
- if (pdata)
+ if (pdata) {
dev->disable_channel_combine = pdata->disable_channel_combine;
+ davinci_i2s_pcm_out.sram_size = pdata->sram_size_playback;
+ davinci_i2s_pcm_in.sram_size = pdata->sram_size_capture;
+ }
dev->clk = clk_get(&pdev->dev, NULL);
if (IS_ERR(dev->clk)) {
ret = -ENODEV;
diff --git a/sound/soc/davinci/davinci-pcm.c b/sound/soc/davinci/davinci-pcm.c
index 3489f18..191cf4f 100644
--- a/sound/soc/davinci/davinci-pcm.c
+++ b/sound/soc/davinci/davinci-pcm.c
@@ -3,6 +3,7 @@
*
* Author: Vladimir Barinov, <vbarinov at embeddedalley.com>
* Copyright: (C) 2007 MontaVista Software, Inc., <source at mvista.com>
+ * added SRAM ping/pong (C) 2008 Troy Kisky <troy.kisky at boundarydevices.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -23,9 +24,28 @@
#include <asm/dma.h>
#include <mach/edma.h>
+#include <mach/sram.h>
#include "davinci-pcm.h"
+#ifdef DEBUG
+static void print_buf_info(int lch, char *name)
+{
+ struct edmacc_param p;
+ if (lch < 0)
+ return;
+ edma_read_slot(lch, &p);
+ printk(KERN_DEBUG "%s: 0x%x, opt=%x, src=%x, a_b_cnt=%x dst=%x\n",
+ name, lch, p.opt, p.src, p.a_b_cnt, p.dst);
+ printk(KERN_DEBUG " src_dst_bidx=%x link_bcntrld=%x src_dst_cidx=%x ccnt=%x\n",
+ p.src_dst_bidx, p.link_bcntrld, p.src_dst_cidx, p.ccnt);
+}
+#else
+static void print_buf_info(int lch, char *name)
+{
+}
+#endif
+
static struct snd_pcm_hardware davinci_pcm_hardware = {
.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID |
@@ -48,14 +68,58 @@ static struct snd_pcm_hardware davinci_pcm_hardware = {
.fifo_size = 0,
};
+/*
+ * How ping/pong works....
+ *
+ * Playback:
+ * ram_params - copys 2*ping_size from start of SDRAM to iram,
+ * links to ram_link_lch2
+ * ram_link_lch2 - copys rest of SDRAM to iram in ping_size units,
+ * links to ram_link_lch
+ * ram_link_lch - copys entire SDRAM to iram in ping_size uints,
+ * links to self
+ *
+ * asp_params - same as asp_link_lch[0]
+ * asp_link_lch[0] - copys from lower half of iram to asp port
+ * links to asp_link_lch[1], triggers iram copy event on completion
+ * asp_link_lch[1] - copys from upper half of iram to asp port
+ * links to asp_link_lch[0], triggers iram copy event on completion
+ * triggers interrupt only needed to let upper SOC levels update position
+ * in stream on completion
+ *
+ * When playback is started:
+ * ram_params started
+ * asp_params started
+ *
+ * Capture:
+ * ram_params - same as ram_link_lch,
+ * links to ram_link_lch
+ * ram_link_lch - same as playback
+ * links to self
+ *
+ * asp_params - same as playback
+ * asp_link_lch[0] - same as playback
+ * asp_link_lch[1] - same as playback
+ *
+ * When capture is started:
+ * asp_params started
+ */
struct davinci_runtime_data {
spinlock_t lock;
int period; /* current DMA period */
int asp_master_lch; /* Master DMA channel */
int asp_link_lch[2]; /* asp parameter link channel, ping/pong */
struct davinci_pcm_dma_params *params; /* DMA params */
+ int ram_master_lch;
+ int ram_link_lch;
+ int ram_link_lch2;
+ struct edmacc_param asp_params;
+ struct edmacc_param ram_params;
};
+/*
+ * Not used with ping/pong
+ */
static void davinci_pcm_enqueue_dma(struct snd_pcm_substream *substream)
{
struct davinci_runtime_data *prtd = substream->runtime->private_data;
@@ -107,48 +171,280 @@ static void davinci_pcm_dma_irq(unsigned lch, u16 ch_status, void *data)
struct snd_pcm_substream *substream = data;
struct davinci_runtime_data *prtd = substream->runtime->private_data;
+ print_buf_info(prtd->ram_master_lch, "i ram_master_lch");
pr_debug("davinci_pcm: lch=%d, status=0x%x\n", lch, ch_status);
if (unlikely(ch_status != DMA_COMPLETE))
return;
if (snd_pcm_running(substream)) {
+ if (prtd->ram_master_lch < 0) {
+ /* No ping/pong must fix up link dma data*/
+ spin_lock(&prtd->lock);
+ davinci_pcm_enqueue_dma(substream);
+ spin_unlock(&prtd->lock);
+ }
snd_pcm_period_elapsed(substream);
+ }
+}
+
+static int allocate_sram(struct snd_pcm_substream *substream, unsigned size)
+{
+ struct snd_dma_buffer *buf = &substream->dma_buffer;
+ struct snd_dma_buffer *iram_dma = NULL;
+ dma_addr_t iram_phys = 0;
+ void *iram_virt = NULL;
+
+ if (buf->private_data || !size)
+ return 0;
+
+ davinci_pcm_hardware.period_bytes_max = size;
+ iram_virt = sram_alloc(size, &iram_phys);
+ if (!iram_virt)
+ goto exit1;
+ iram_dma = kzalloc(sizeof(*iram_dma), GFP_KERNEL);
+ if (!iram_dma)
+ goto exit2;
+ iram_dma->area = iram_virt;
+ iram_dma->addr = iram_phys;
+ memset(iram_dma->area, 0, size);
+ iram_dma->bytes = size;
+ buf->private_data = iram_dma;
+ return 0;
+exit2:
+ if (iram_virt)
+ sram_free(iram_virt, size);
+exit1:
+ return -ENOMEM;
+}
+
+/*
+ * Only used with ping/pong.
+ * This is called after runtime->dma_addr, period_bytes and data_type are valid
+ */
+static int ping_pong_dma_setup(struct snd_pcm_substream *substream)
+{
+ unsigned short ram_src_cidx, ram_dst_cidx;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct davinci_runtime_data *prtd = runtime->private_data;
+ struct snd_dma_buffer *iram_dma =
+ (struct snd_dma_buffer *)substream->dma_buffer.private_data;
+ struct snd_soc_pcm_runtime *rtd = substream->private_data;
+ struct davinci_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
+ unsigned int data_type = dma_data->data_type;
+ /* divide by 2 for ping/pong */
+ unsigned int ping_size = snd_pcm_lib_period_bytes(substream) >> 1;
+ int lch = prtd->asp_link_lch[1];
+ if ((data_type == 0) || (data_type > 4)) {
+ printk(KERN_ERR "%s: data_type=%i\n", __func__, data_type);
+ return -EINVAL;
+ }
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ dma_addr_t asp_src_pong = iram_dma->addr + ping_size;
+ ram_src_cidx = ping_size;
+ ram_dst_cidx = -ping_size;
+ edma_set_src(lch, asp_src_pong, INCR, W8BIT);
+
+ lch = prtd->asp_link_lch[0];
+ edma_set_src_index(lch, data_type, 0);
+ lch = prtd->asp_link_lch[1];
+ edma_set_src_index(lch, data_type, 0);
+
+ lch = prtd->ram_link_lch;
+ edma_set_src(lch, runtime->dma_addr, INCR, W32BIT);
+ } else {
+ dma_addr_t asp_dst_pong = iram_dma->addr + ping_size;
+ ram_src_cidx = -ping_size;
+ ram_dst_cidx = ping_size;
+ edma_set_dest(lch, asp_dst_pong, INCR, W8BIT);
+
+ lch = prtd->asp_link_lch[0];
+ edma_set_dest_index(lch, data_type, 0);
+ lch = prtd->asp_link_lch[1];
+ edma_set_dest_index(lch, data_type, 0);
+
+ lch = prtd->ram_link_lch;
+ edma_set_dest(lch, runtime->dma_addr, INCR, W32BIT);
+ }
- spin_lock(&prtd->lock);
- davinci_pcm_enqueue_dma(substream);
- spin_unlock(&prtd->lock);
+ lch = prtd->asp_link_lch[0];
+ edma_set_transfer_params(lch, data_type,
+ ping_size/data_type, 1, 0, ASYNC);
+ lch = prtd->asp_link_lch[1];
+ edma_set_transfer_params(lch, data_type,
+ ping_size/data_type, 1, 0, ASYNC);
+
+ lch = prtd->ram_link_lch;
+ edma_set_src_index(lch, ping_size, ram_src_cidx);
+ edma_set_dest_index(lch, ping_size, ram_dst_cidx);
+ edma_set_transfer_params(lch, ping_size, 2,
+ runtime->periods, 2, ASYNC);
+
+ /* init master params */
+ edma_read_slot(prtd->asp_link_lch[0], &prtd->asp_params);
+ edma_read_slot(prtd->ram_link_lch, &prtd->ram_params);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ struct edmacc_param p_ram;
+ /* Copy entire iram buffer before playback started */
+ prtd->ram_params.a_b_cnt = (1 << 16) | (ping_size << 1);
+ /* 0 dst_bidx */
+ prtd->ram_params.src_dst_bidx = (ping_size << 1);
+ /* 0 dst_cidx */
+ prtd->ram_params.src_dst_cidx = (ping_size << 1);
+ prtd->ram_params.ccnt = 1;
+
+ /* Skip 1st period */
+ edma_read_slot(prtd->ram_link_lch, &p_ram);
+ p_ram.src += (ping_size << 1);
+ p_ram.ccnt -= 1;
+ edma_write_slot(prtd->ram_link_lch2, &p_ram);
+ /*
+ * When 1st started, ram -> iram dma channel will fill the
+ * entire iram. Then, whenever a ping/pong asp buffer finishes,
+ * 1/2 iram will be filled.
+ */
+ prtd->ram_params.link_bcntrld =
+ EDMA_CHAN_SLOT(prtd->ram_link_lch2) << 5;
}
+ return 0;
+}
+
+/* 1 asp tx or rx channel using 2 parameter channels
+ * 1 ram to/from iram channel using 1 parameter channel
+ *
+ * Playback
+ * ram copy channel kicks off first,
+ * 1st ram copy of entire iram buffer completion kicks off asp channel
+ * asp tcc always kicks off ram copy of 1/2 iram buffer
+ *
+ * Record
+ * asp channel starts, tcc kicks off ram copy
+ */
+static int request_ping_pong(struct snd_pcm_substream *substream,
+ struct davinci_runtime_data *prtd,
+ struct snd_dma_buffer *iram_dma)
+{
+ dma_addr_t asp_src_ping;
+ dma_addr_t asp_dst_ping;
+ int lch;
+ struct davinci_pcm_dma_params *dma_data = prtd->params;
+
+ /* Request ram master channel */
+ lch = prtd->ram_master_lch = edma_alloc_channel(EDMA_CHANNEL_ANY,
+ davinci_pcm_dma_irq, substream,
+ EVENTQ_1);
+ if (lch < 0)
+ goto exit1;
+
+ /* Request ram link channel */
+ lch = prtd->ram_link_lch = edma_alloc_slot(
+ EDMA_CTLR(prtd->ram_master_lch), EDMA_SLOT_ANY);
+ if (lch < 0)
+ goto exit2;
+
+ lch = prtd->asp_link_lch[1] = edma_alloc_slot(
+ EDMA_CTLR(prtd->asp_master_lch), EDMA_SLOT_ANY);
+ if (lch < 0)
+ goto exit3;
+
+ prtd->ram_link_lch2 = -1;
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ lch = prtd->ram_link_lch2 = edma_alloc_slot(
+ EDMA_CTLR(prtd->ram_master_lch), EDMA_SLOT_ANY);
+ if (lch < 0)
+ goto exit4;
+ }
+ /* circle ping-pong buffers */
+ edma_link(prtd->asp_link_lch[0], prtd->asp_link_lch[1]);
+ edma_link(prtd->asp_link_lch[1], prtd->asp_link_lch[0]);
+ /* circle ram buffers */
+ edma_link(prtd->ram_link_lch, prtd->ram_link_lch);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ asp_src_ping = iram_dma->addr;
+ asp_dst_ping = dma_data->dma_addr; /* fifo */
+ } else {
+ asp_src_ping = dma_data->dma_addr; /* fifo */
+ asp_dst_ping = iram_dma->addr;
+ }
+ /* ping */
+ lch = prtd->asp_link_lch[0];
+ edma_set_src(lch, asp_src_ping, INCR, W16BIT);
+ edma_set_dest(lch, asp_dst_ping, INCR, W16BIT);
+ edma_set_src_index(lch, 0, 0);
+ edma_set_dest_index(lch, 0, 0);
+
+ edma_read_slot(lch, &prtd->asp_params);
+ prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f) | TCINTEN);
+ prtd->asp_params.opt |= TCCHEN | EDMA_TCC(prtd->ram_master_lch & 0x3f);
+ edma_write_slot(lch, &prtd->asp_params);
+
+ /* pong */
+ lch = prtd->asp_link_lch[1];
+ edma_set_src(lch, asp_src_ping, INCR, W16BIT);
+ edma_set_dest(lch, asp_dst_ping, INCR, W16BIT);
+ edma_set_src_index(lch, 0, 0);
+ edma_set_dest_index(lch, 0, 0);
+
+ edma_read_slot(lch, &prtd->asp_params);
+ prtd->asp_params.opt &= ~(TCCMODE | EDMA_TCC(0x3f));
+ /* interrupt after every pong completion */
+ prtd->asp_params.opt |= TCINTEN | TCCHEN |
+ EDMA_TCC(EDMA_CHAN_SLOT(prtd->ram_master_lch));
+ edma_write_slot(lch, &prtd->asp_params);
+
+ /* ram */
+ lch = prtd->ram_link_lch;
+ edma_set_src(lch, iram_dma->addr, INCR, W32BIT);
+ edma_set_dest(lch, iram_dma->addr, INCR, W32BIT);
+ pr_debug("%s: audio dma channels/slots in use for ram:%u %u %u,"
+ "for asp:%u %u %u\n", __func__,
+ prtd->ram_master_lch, prtd->ram_link_lch, prtd->ram_link_lch2,
+ prtd->asp_master_lch, prtd->asp_link_lch[0],
+ prtd->asp_link_lch[1]);
+ return 0;
+exit4:
+ edma_free_channel(prtd->asp_link_lch[1]);
+ prtd->asp_link_lch[1] = -1;
+exit3:
+ edma_free_channel(prtd->ram_link_lch);
+ prtd->ram_link_lch = -1;
+exit2:
+ edma_free_channel(prtd->ram_master_lch);
+ prtd->ram_master_lch = -1;
+exit1:
+ return lch;
}
static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
{
+ struct snd_dma_buffer *iram_dma;
struct davinci_runtime_data *prtd = substream->runtime->private_data;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct davinci_pcm_dma_params *dma_data = rtd->dai->cpu_dai->dma_data;
- struct edmacc_param p_ram;
- int ret;
+ int lch;
if (!dma_data)
return -ENODEV;
prtd->params = dma_data;
- /* Request master DMA channel */
- ret = edma_alloc_channel(prtd->params->channel,
- davinci_pcm_dma_irq, substream,
- EVENTQ_0);
- if (ret < 0)
- return ret;
- prtd->asp_master_lch = ret;
+ /* Request asp master DMA channel */
+ lch = prtd->asp_master_lch = edma_alloc_channel(dma_data->channel,
+ davinci_pcm_dma_irq, substream, EVENTQ_0);
+ if (lch < 0)
+ goto exit1;
- /* Request parameter RAM reload slot */
- ret = edma_alloc_slot(EDMA_CTLR(prtd->asp_master_lch), EDMA_SLOT_ANY);
- if (ret < 0) {
- edma_free_channel(prtd->asp_master_lch);
- return ret;
- }
- prtd->asp_link_lch[0] = ret;
+ /* Request asp link channels */
+ lch = prtd->asp_link_lch[0] = edma_alloc_slot(
+ EDMA_CTLR(prtd->asp_master_lch), EDMA_SLOT_ANY);
+ if (lch < 0)
+ goto exit2;
+
+ allocate_sram(substream, dma_data->sram_size);
+ iram_dma = (struct snd_dma_buffer *)substream->dma_buffer.private_data;
+ if (iram_dma)
+ return request_ping_pong(substream, prtd, iram_dma);
/* Issue transfer completion IRQ when the channel completes a
* transfer, then always reload from the same slot (by a kind
@@ -159,12 +455,17 @@ static int davinci_pcm_dma_request(struct snd_pcm_substream *substream)
* the buffer and its length (ccnt) ... use it as a template
* so davinci_pcm_enqueue_dma() takes less time in IRQ.
*/
- edma_read_slot(prtd->asp_link_lch[0], &p_ram);
- p_ram.opt |= TCINTEN | EDMA_TCC(EDMA_CHAN_SLOT(prtd->asp_master_lch));
- p_ram.link_bcntrld = EDMA_CHAN_SLOT(prtd->asp_link_lch[0]) << 5;
- edma_write_slot(prtd->asp_link_lch[0], &p_ram);
-
+ edma_read_slot(lch, &prtd->asp_params);
+ prtd->asp_params.opt |= TCINTEN |
+ EDMA_TCC(EDMA_CHAN_SLOT(prtd->asp_master_lch));
+ prtd->asp_params.link_bcntrld = EDMA_CHAN_SLOT(lch) << 5;
+ edma_write_slot(lch, &prtd->asp_params);
return 0;
+exit2:
+ edma_free_channel(prtd->asp_master_lch);
+ prtd->asp_master_lch = -1;
+exit1:
+ return lch;
}
static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
@@ -178,12 +479,12 @@ static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- edma_start(prtd->asp_master_lch);
+ edma_resume(prtd->asp_master_lch);
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- edma_stop(prtd->asp_master_lch);
+ edma_pause(prtd->asp_master_lch);
break;
default:
ret = -EINVAL;
@@ -198,14 +499,35 @@ static int davinci_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
static int davinci_pcm_prepare(struct snd_pcm_substream *substream)
{
struct davinci_runtime_data *prtd = substream->runtime->private_data;
- struct edmacc_param temp;
+ if (prtd->ram_master_lch >= 0) {
+ int ret = ping_pong_dma_setup(substream);
+ if (ret < 0)
+ return ret;
+
+ edma_write_slot(prtd->ram_master_lch, &prtd->ram_params);
+ edma_write_slot(prtd->asp_master_lch, &prtd->asp_params);
+
+ print_buf_info(prtd->ram_master_lch, "ram_master_lch");
+ print_buf_info(prtd->ram_link_lch, "ram_link_lch");
+ print_buf_info(prtd->ram_link_lch2, "ram_link_lch2");
+ print_buf_info(prtd->asp_master_lch, "asp_master_lch");
+ print_buf_info(prtd->asp_link_lch[0], "asp_link_lch[0]");
+ print_buf_info(prtd->asp_link_lch[1], "asp_link_lch[1]");
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* copy 1st iram buffer */
+ edma_start(prtd->ram_master_lch);
+ }
+ edma_start(prtd->asp_master_lch);
+ return 0;
+ }
prtd->period = 0;
davinci_pcm_enqueue_dma(substream);
/* Copy self-linked parameter RAM entry into master channel */
- edma_read_slot(prtd->asp_link_lch[0], &temp);
- edma_write_slot(prtd->asp_master_lch, &temp);
+ edma_read_slot(prtd->asp_link_lch[0], &prtd->asp_params);
+ edma_write_slot(prtd->asp_master_lch, &prtd->asp_params);
davinci_pcm_enqueue_dma(substream);
return 0;
@@ -217,20 +539,53 @@ davinci_pcm_pointer(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct davinci_runtime_data *prtd = runtime->private_data;
unsigned int offset;
- dma_addr_t count;
- dma_addr_t src, dst;
+ int asp_count;
+ dma_addr_t asp_src, asp_dst;
spin_lock(&prtd->lock);
-
- edma_get_position(prtd->asp_master_lch, &src, &dst);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- count = src - runtime->dma_addr;
- else
- count = dst - runtime->dma_addr;
-
+ if (prtd->ram_master_lch >= 0) {
+ int ram_count;
+ int mod_ram;
+ dma_addr_t ram_src, ram_dst;
+ unsigned int period_size = snd_pcm_lib_period_bytes(substream);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* reading ram before asp should be safe
+ * as long as the asp transfers less than a ping size
+ * of bytes between the 2 reads
+ */
+ edma_get_position(prtd->ram_master_lch,
+ &ram_src, &ram_dst);
+ edma_get_position(prtd->asp_master_lch,
+ &asp_src, &asp_dst);
+ asp_count = asp_src - prtd->asp_params.src;
+ ram_count = ram_src - prtd->ram_params.src;
+ mod_ram = ram_count % period_size;
+ mod_ram -= asp_count;
+ if (mod_ram < 0)
+ mod_ram += period_size;
+ else if (mod_ram == 0) {
+ if (snd_pcm_running(substream))
+ mod_ram += period_size;
+ }
+ ram_count -= mod_ram;
+ if (ram_count < 0)
+ ram_count += period_size * runtime->periods;
+ } else {
+ edma_get_position(prtd->ram_master_lch,
+ &ram_src, &ram_dst);
+ ram_count = ram_dst - prtd->ram_params.dst;
+ }
+ asp_count = ram_count;
+ } else {
+ edma_get_position(prtd->asp_master_lch, &asp_src, &asp_dst);
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
+ asp_count = asp_src - runtime->dma_addr;
+ else
+ asp_count = asp_dst - runtime->dma_addr;
+ }
spin_unlock(&prtd->lock);
- offset = bytes_to_frames(runtime, count);
+ offset = bytes_to_frames(runtime, asp_count);
if (offset >= runtime->buffer_size)
offset = 0;
@@ -255,6 +610,11 @@ static int davinci_pcm_open(struct snd_pcm_substream *substream)
return -ENOMEM;
spin_lock_init(&prtd->lock);
+ prtd->asp_master_lch = -1;
+ prtd->asp_link_lch[0] = prtd->asp_link_lch[1] = -1;
+ prtd->ram_master_lch = -1;
+ prtd->ram_link_lch = -1;
+ prtd->ram_link_lch2 = -1;
runtime->private_data = prtd;
@@ -272,10 +632,29 @@ static int davinci_pcm_close(struct snd_pcm_substream *substream)
struct snd_pcm_runtime *runtime = substream->runtime;
struct davinci_runtime_data *prtd = runtime->private_data;
- edma_unlink(prtd->asp_link_lch[0]);
-
- edma_free_slot(prtd->asp_link_lch[0]);
- edma_free_channel(prtd->asp_master_lch);
+ if (prtd->ram_master_lch >= 0)
+ edma_stop(prtd->ram_master_lch);
+ if (prtd->asp_master_lch >= 0)
+ edma_stop(prtd->asp_master_lch);
+ if (prtd->asp_link_lch[0] >= 0)
+ edma_unlink(prtd->asp_link_lch[0]);
+ if (prtd->asp_link_lch[1] >= 0)
+ edma_unlink(prtd->asp_link_lch[1]);
+ if (prtd->ram_link_lch >= 0)
+ edma_unlink(prtd->ram_link_lch);
+
+ if (prtd->asp_link_lch[0] >= 0)
+ edma_free_slot(prtd->asp_link_lch[0]);
+ if (prtd->asp_link_lch[1] >= 0)
+ edma_free_slot(prtd->asp_link_lch[1]);
+ if (prtd->asp_master_lch >= 0)
+ edma_free_channel(prtd->asp_master_lch);
+ if (prtd->ram_link_lch >= 0)
+ edma_free_slot(prtd->ram_link_lch);
+ if (prtd->ram_link_lch2 >= 0)
+ edma_free_slot(prtd->ram_link_lch2);
+ if (prtd->ram_master_lch >= 0)
+ edma_free_channel(prtd->ram_master_lch);
kfree(prtd);
@@ -346,6 +725,7 @@ static void davinci_pcm_free(struct snd_pcm *pcm)
int stream;
for (stream = 0; stream < 2; stream++) {
+ struct snd_dma_buffer *iram_dma;
substream = pcm->streams[stream].substream;
if (!substream)
continue;
@@ -357,6 +737,11 @@ static void davinci_pcm_free(struct snd_pcm *pcm)
dma_free_writecombine(pcm->card->dev, buf->bytes,
buf->area, buf->addr);
buf->area = NULL;
+ iram_dma = (struct snd_dma_buffer *)buf->private_data;
+ if (iram_dma) {
+ sram_free(iram_dma->area, iram_dma->bytes);
+ kfree(iram_dma);
+ }
}
}
diff --git a/sound/soc/davinci/davinci-pcm.h b/sound/soc/davinci/davinci-pcm.h
index eb4287f..8d66b35 100644
--- a/sound/soc/davinci/davinci-pcm.h
+++ b/sound/soc/davinci/davinci-pcm.h
@@ -20,6 +20,7 @@ struct davinci_pcm_dma_params {
char *name; /* stream identifier */
int channel; /* sync dma channel ID */
dma_addr_t dma_addr; /* device physical address for DMA */
+ unsigned sram_size;
enum dma_event_q eventq_no; /* event queue number */
unsigned char data_type; /* xfer data type */
unsigned char convert_mono_stereo;
--
1.5.6.3
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