Staging: sst: Intel SST audio driver

This is the Intel SST audio driver.

As compared to the previous versions it has all the printks and other stuff
noted cleaned up and more hardware support. The Aava support is disabled in
this patch (is_aava resolves to 0) because the Aava board detection logic
is not yet upstream.

The driver itself is a combination of a traditional ALSA driver and a
hardware assisted offload driver which can play audio while the processor
is asleep but which can't do all the more interactive stuff.

In the general case most software would use the ALSA interface, but the
other interface is needed for certain classes of use such as music playback
on highly power consumption sensitive devices.

This is going to staging primarily because it depends upon the staging memrar
driver.

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Harsha Priya <priya.harsha@intel.com>
[Merged together and tweaked for -next]
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 174 insertions, 0 deletions

diff --git a/drivers/staging/intel_sst/intelmid_pvt.c b/drivers/staging/intel_sst/intelmid_pvt.c
new file mode 100644
index 0000000..9ed9475
--- /dev/null
+++ b/drivers/staging/intel_sst/intelmid_pvt.c
@@ -0,0 +1,174 @@
+/*
+ *   intelmid_pvt.h - Intel Sound card driver for MID
+ *
+ *  Copyright (C) 2008-10 Intel Corp
+ *  Authors:	Harsha Priya <priya.harsha@intel.com>
+ *		Vinod Koul <vinod.koul@intel.com>
+ *		KP Jeeja <jeeja.kp@intel.com>
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  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; version 2 of the License.
+ *
+ *  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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ * ALSA driver for Intel MID sound card chipset - holding private functions
+ */
+#include <linux/io.h>
+#include <asm/intel_scu_ipc.h>
+#include <sound/core.h>
+#include <sound/control.h>
+#include <sound/pcm.h>
+#include "jack.h"
+#include "intel_sst.h"
+#include "intel_sst_ioctl.h"
+#include "intelmid_snd_control.h"
+#include "intelmid.h"
+
+
+void period_elapsed(void *mad_substream)
+{
+	struct snd_pcm_substream *substream = mad_substream;
+	struct mad_stream_pvt *stream;
+
+
+
+	if (!substream || !substream->runtime)
+		return;
+	stream = substream->runtime->private_data;
+	if (!stream)
+		return;
+
+	if (stream->stream_status != RUNNING)
+		return;
+	pr_debug("sst: calling period elapsed\n");
+	snd_pcm_period_elapsed(substream);
+	return;
+}
+
+
+int snd_intelmad_alloc_stream(struct snd_pcm_substream *substream)
+{
+	struct snd_intelmad *intelmaddata = snd_pcm_substream_chip(substream);
+	struct mad_stream_pvt *stream = substream->runtime->private_data;
+	struct snd_sst_stream_params param = {{{0,},},};
+	struct snd_sst_params str_params = {0};
+	int ret_val;
+
+	/* set codec params and inform SST driver the same */
+
+	param.uc.pcm_params.codec = SST_CODEC_TYPE_PCM;
+	param.uc.pcm_params.num_chan = (u8) substream->runtime->channels;
+	param.uc.pcm_params.pcm_wd_sz = substream->runtime->sample_bits;
+	param.uc.pcm_params.reserved = 0;
+	param.uc.pcm_params.sfreq = substream->runtime->rate;
+	param.uc.pcm_params.ring_buffer_size =
+					snd_pcm_lib_buffer_bytes(substream);
+	param.uc.pcm_params.period_count = substream->runtime->period_size;
+	param.uc.pcm_params.ring_buffer_addr =
+				virt_to_phys(substream->runtime->dma_area);
+	pr_debug("sst: period_cnt = %d\n", param.uc.pcm_params.period_count);
+	pr_debug("sst: sfreq= %d, wd_sz = %d\n",
+		 param.uc.pcm_params.sfreq, param.uc.pcm_params.pcm_wd_sz);
+
+	str_params.sparams = param;
+	str_params.codec = SST_CODEC_TYPE_PCM;
+
+	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+		str_params.ops = STREAM_OPS_PLAYBACK;
+		pr_debug("sst: Playbck stream,Device %d\n", stream->device);
+	} else {
+		str_params.ops = STREAM_OPS_CAPTURE;
+		stream->device = SND_SST_DEVICE_CAPTURE;
+		pr_debug("sst: Capture stream,Device %d\n", stream->device);
+	}
+	str_params.device_type = stream->device;
+	ret_val = intelmaddata->sstdrv_ops->control_set(SST_SND_ALLOC,
+					&str_params);
+	pr_debug("sst: SST_SND_PLAY/CAPTURE ret_val = %x\n",
+			ret_val);
+	if (ret_val < 0)
+		return ret_val;
+
+	stream->stream_info.str_id = ret_val;
+	stream->stream_status = INIT;
+	stream->stream_info.buffer_ptr = 0;
+	pr_debug("sst: str id :  %d\n", stream->stream_info.str_id);
+
+	return ret_val;
+}
+
+int snd_intelmad_init_stream(struct snd_pcm_substream *substream)
+{
+	struct mad_stream_pvt *stream = substream->runtime->private_data;
+	struct snd_intelmad *intelmaddata = snd_pcm_substream_chip(substream);
+	int ret_val;
+
+	pr_debug("sst: setting buffer ptr param\n");
+	stream->stream_info.period_elapsed = period_elapsed;
+	stream->stream_info.mad_substream = substream;
+	stream->stream_info.buffer_ptr = 0;
+	stream->stream_info.sfreq = substream->runtime->rate;
+	ret_val = intelmaddata->sstdrv_ops->control_set(SST_SND_STREAM_INIT,
+					&stream->stream_info);
+	if (ret_val)
+		pr_err("sst: control_set ret error %d\n", ret_val);
+	return ret_val;
+
+}
+
+
+/**
+ * sst_sc_reg_access - IPC read/write wrapper
+ *
+ * @sc_access:  array of data, addresses and mask
+ * @type: operation type
+ * @num_val: number of reg to opertae on
+ *
+ * Reads/writes/read-modify operations on registers accessed through SCU (sound
+ * card and few SST DSP regsisters that are not accissible to IA)
+ */
+int sst_sc_reg_access(struct sc_reg_access *sc_access,
+					int type, int num_val)
+{
+	int i, retval = 0;
+	if (type == PMIC_WRITE) {
+		for (i = 0; i < num_val; i++) {
+			retval = intel_scu_ipc_iowrite8(sc_access[i].reg_addr,
+							sc_access[i].value);
+			if (retval) {
+				pr_err("sst: IPC write failed!!! %d\n", retval);
+				return retval;
+			}
+		}
+	} else if (type == PMIC_READ) {
+		for (i = 0; i < num_val; i++) {
+			retval = intel_scu_ipc_ioread8(sc_access[i].reg_addr,
+							&(sc_access[i].value));
+			if (retval) {
+				pr_err("sst: IPC read failed!!!!!%d\n", retval);
+				return retval;
+			}
+		}
+	} else {
+		for (i = 0; i < num_val; i++) {
+			retval = intel_scu_ipc_update_register(
+				sc_access[i].reg_addr, sc_access[i].value,
+				sc_access[i].mask);
+			if (retval) {
+				pr_err("sst: IPC Modify failed!!!%d\n", retval);
+				return retval;
+			}
+		}
+	}
+	return retval;
+}