From: Kenneth Westfield
Add platform driver for the Qualcomm Technologies
low-power audio subsystem (LPASS) ports.
Signed-off-by: Kenneth Westfield
Acked-by: Banajit Goswami
---
sound/soc/qcom/lpass-platform.c | 526
1 file changed, 526 insertions(+)
create mode 100644 sound/soc/qcom/lpass-platform.c
diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
new file mode 100644
index
..2fa6280dfb234b213904ad73dfad91c7f575538c
--- /dev/null
+++ b/sound/soc/qcom/lpass-platform.c
@@ -0,0 +1,526 @@
+/*
+ * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * lpass-platform.c -- ALSA SoC platform driver for QTi LPASS
+ */
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include "lpass-lpaif-ipq806x.h"
+#include "lpass.h"
+
+#define LPASS_PLATFORM_BUFFER_SIZE (16 * 1024)
+#define LPASS_PLATFORM_PERIODS 2
+
+static struct snd_pcm_hardware lpass_platform_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats= SNDRV_PCM_FMTBIT_S16 |
+ SNDRV_PCM_FMTBIT_S24 |
+ SNDRV_PCM_FMTBIT_S32,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .channels_min = 1,
+ .channels_max = 8,
+ .buffer_bytes_max = LPASS_PLATFORM_BUFFER_SIZE,
+ .period_bytes_max = LPASS_PLATFORM_BUFFER_SIZE /
+ LPASS_PLATFORM_PERIODS,
+ .period_bytes_min = LPASS_PLATFORM_BUFFER_SIZE /
+ LPASS_PLATFORM_PERIODS,
+ .periods_min= LPASS_PLATFORM_PERIODS,
+ .periods_max= LPASS_PLATFORM_PERIODS,
+ .fifo_size = 0,
+};
+
+static int lpass_platform_pcmops_open(struct snd_pcm_substream *substream)
+{
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+ int ret;
+
+ snd_soc_set_runtime_hwparams(substream, &lpass_platform_pcm_hardware);
+
+ runtime->dma_bytes = lpass_platform_pcm_hardware.buffer_bytes_max;
+
+ ret = snd_pcm_hw_constraint_integer(runtime,
+ SNDRV_PCM_HW_PARAM_PERIODS);
+ if (ret < 0) {
+ dev_err(soc_runtime->dev, "%s() setting constraints failed:
%d\n",
+ __func__, ret);
+ return -EINVAL;
+ }
+
+ snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+ return 0;
+}
+
+static int lpass_platform_pcmops_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params)
+{
+ struct snd_soc_pcm_runtime *soc_runtime = substream->private_data;
+ struct lpass_data *drvdata =
+ snd_soc_platform_get_drvdata(soc_runtime->platform);
+ snd_pcm_format_t format = params_format(params);
+ unsigned int channels = params_channels(params);
+ unsigned int regval;
+ int bitwidth;
+ int ret;
+
+ bitwidth = snd_pcm_format_width(format);
+ if (bitwidth < 0) {
+ dev_err(soc_runtime->dev, "%s() invalid bit width given: %d\n",
+ __func__, bitwidth);
+ return bitwidth;
+ }
+
+ regval = LPAIF_RDMACTL_BURSTEN_INCR4 |
+ LPAIF_RDMACTL_AUDINTF_MI2S |
+ LPAIF_RDMACTL_FIFOWM_8;
+
+ switch (bitwidth) {
+ case 16:
+ switch (channels) {
+ case 1:
+ case 2:
+ regval |= LPAIF_RDMACTL_WPSCNT_ONE;
+ break;
+ case 4:
+ regval |= LPAIF_RDMACTL_WPSCNT_TWO;
+ break;
+ case 6:
+ regval |= LPAIF_RDMACTL
