path: root/meta/recipes-kernel/linux/linux-netbook-2.6.33.2/linux-2.6.34-moorestown-audio-driver-6.0-3-8.patch

From 3657fc661cea2b120a7516cb66002fcd3af34e35 Mon Sep 17 00:00:00 2001
From:  R, Dharageswari <dharageswari.r@intel.com>
Date: Thu, 29 Apr 2010 20:23:41 +0530
Subject: [PATCH] ADR-Post-Beta-0.05.002.03-3/8-Moorestown Audio Drivers: SST interface modules

This patch adds the SST driver interface module. Interface module is the
one which talks to upper/other layer in the SST Driver
intel_sst_interface.c - implements the MAD driver registration & deregistration
functions. SST driver is also a character driver, so that player/middleware can
communicate with SST driver. All char driver routines like open, close, read,
write and ioctl are implemented here. The ioctl operations are used by
middleware/players to open/close, control and configure astream as well as to
transfer the data.
intel_sst_ioctl.h -  exposes the IOCTL definition for players/middleware
as well as the various structure for passing stream parameters

Signed-off-by: Vinod Koul <vinod.koul@intel.com>

	new file:   include/sound/intel_sst_ioctl.h
	new file:   sound/pci/sst/intel_sst_interface.c
Patch-mainline: 2.6.35?
---
 include/sound/intel_sst_ioctl.h     |  390 +++++++
 sound/pci/sst/intel_sst_interface.c | 2099 +++++++++++++++++++++++++++++++++++
 2 files changed, 2489 insertions(+), 0 deletions(-)
 create mode 100644 include/sound/intel_sst_ioctl.h
 create mode 100644 sound/pci/sst/intel_sst_interface.c

diff --git a/include/sound/intel_sst_ioctl.h b/include/sound/intel_sst_ioctl.h
new file mode 100644
index 0000000..442b388
--- /dev/null
+++ b/include/sound/intel_sst_ioctl.h
@@ -0,0 +1,390 @@
+#ifndef __INTEL_SST_IOCTL_H__
+#define __INTEL_SST_IOCTL_H__
+/*
+ *  intel_sst_ipc.h - Intel SST Driver for audio engine
+ *
+ *  Copyright (C) 2008-10 	Intel Corporation
+ *  Authors:	Vinod Koul <vinod.koul@intel.com>
+ *  			Harsha Priya <priya.harsha@intel.com>
+ *				Dharageswari R <dharageswari.r@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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ *  This file defines all sst ioctls
+ */
+
+/* codec and post/pre processing related info */
+
+enum sst_codec_types {
+/*  AUDIO/MUSIC	CODEC Type Definitions */
+	SST_CODEC_TYPE_UNKNOWN = 0,
+	SST_CODEC_TYPE_PCM,	/* Pass through Audio codec */
+	SST_CODEC_TYPE_MP3,
+	SST_CODEC_TYPE_MP24,
+	SST_CODEC_TYPE_AAC,
+	SST_CODEC_TYPE_AACP,
+	SST_CODEC_TYPE_eAACP,
+	SST_CODEC_TYPE_WMA9,
+	SST_CODEC_TYPE_WMA10,
+	SST_CODEC_TYPE_WMA10P,
+	SST_CODEC_TYPE_RA,
+	SST_CODEC_TYPE_DDAC3,
+	SST_CODEC_TYPE_STEREO_TRUE_HD,
+	SST_CODEC_TYPE_STEREO_HD_PLUS,
+
+	/*  VOICE CODEC Type Definitions */
+	SST_CODEC_TYPE_VOICE_PCM = 0x21, /* Pass through voice codec */
+	SST_CODEC_SRC = 0x64,
+	SST_CODEC_MIXER = 0x65,
+	SST_CODEC_DOWN_MIXER = 0x66,
+	SST_CODEC_VOLUME_CONTROL = 0x67,
+	SST_CODEC_OEM1 = 0xC8,
+	SST_CODEC_OEM2 = 0xC9,
+};
+
+enum snd_sst_stream_ops {
+	STREAM_OPS_PLAYBACK = 0,	/* Decode */
+	STREAM_OPS_CAPTURE,		/* Encode */
+	STREAM_OPS_PLAYBACK_DRM,	/* Play Audio/Voice */
+	STREAM_OPS_PLAYBACK_ALERT,	/* Play Audio/Voice */
+	STREAM_OPS_CAPTURE_VOICE_CALL,	/* CSV Voice recording */
+};
+
+enum stream_type {
+	STREAM_TYPE_MUSIC = 1,
+	STREAM_TYPE_VOICE
+};
+
+/* Firmware Version info */
+struct snd_sst_fw_version {
+	__u8 build;	/* build number*/
+	__u8 minor;	/* minor number*/
+	__u8 major;	/* major number*/
+	__u8 type; /* build type */
+};
+
+/* Port info structure */
+struct snd_sst_port_info {
+	__u16 port_type;
+	__u16 reserved;
+};
+
+/* Mixer info structure */
+struct snd_sst_mix_info {
+	__u16 max_streams;
+	__u16 reserved;
+};
+
+/* PCM Parameters */
+struct snd_pcm_params {
+	__u16 codec;	/* codec type */
+	__u8 num_chan;	/* 1=Mono, 2=Stereo */
+	__u8 pcm_wd_sz;	/* 16/24 - bit*/
+	__u32 brate;	/* Bitrate in bits per second */
+	__u32 sfreq;	/* Sampling rate in Hz */
+//	__u16 frame_size;
+//	__u16 samples_per_frame;	/* Frame size num samples per frame */
+	__u32 buffer_size;
+	__u32 period_count; /* period elapsed time count, in samples,*/
+};
+
+/* MP3 Music Parameters Message */
+struct snd_mp3_params {
+	__u16  codec;
+	__u8   num_chan;	/* 1=Mono, 2=Stereo	*/
+	__u8   pcm_wd_sz; /* 16/24 - bit*/
+	__u32  brate; /* Use the hard coded value. */
+	__u32  sfreq; /* Sampling freq eg. 8000, 441000, 48000 */
+	__u8  crc_check; /* crc_check - disable (0) or enable (1) */
+	__u8  op_align; /* op align 0- 16 bit, 1- MSB, 2 LSB*/
+	__u16  reserved;	/* Unused */
+};
+
+#define AAC_BIT_STREAM_ADTS		0
+#define AAC_BIT_STREAM_ADIF		1
+#define AAC_BIT_STREAM_RAW		2
+
+/* AAC Music Parameters Message */
+struct snd_aac_params {
+	__u16 codec;
+	__u8 num_chan; /* 1=Mono, 2=Stereo*/
+	__u8 pcm_wd_sz; /* 16/24 - bit*/
+	__u32 brate;
+	__u32 sfreq; /* Sampling freq eg. 8000, 441000, 48000 */
+	__u32 aac_srate;	/* Plain AAC decoder operating sample rate */
+	__u8 mpg_id; /* 0=MPEG-2, 1=MPEG-4 */
+	__u8 bs_format; /* input bit stream format adts=0, adif=1, raw=2 */
+	__u8 aac_profile; /* 0=Main Profile, 1=LC profile, 3=SSR profile */
+	__u8 ext_chl; /* No.of external channels */
+	__u8 aot; /* Audio object type. 1=Main , 2=LC , 3=SSR, 4=SBR*/
+	__u8 op_align; /* output alignment 0=16 bit , 1=MSB, 2= LSB align */
+	__u8 brate_type; /* 0=CBR, 1=VBR */
+	__u8 crc_check; /* crc check 0= disable, 1=enable */
+	__s8 bit_stream_format[8]; /* input bit stream format adts/adif/raw */
+	__u8 jstereo; /* Joint stereo Flag */
+	__u8 sbr_present; /* 1 = SBR Present, 0 = SBR absent, for RAW */
+	__u8 downsample;       /* 1 = Downsampling ON, 0 = Downsampling OFF */
+	__u8 num_syntc_elems; /* 1- Mono/stereo, 0 - Dual Mono, 0 - for raw */
+	__s8 syntc_id[2]; /* 0 for ID_SCE(Dula Mono), -1 for raw */
+	__s8 syntc_tag[2]; /* raw - -1 and 0 -16 for rest of the streams */
+	__u8 pce_present; /* Flag. 1- present 0 - not present, for RAW */
+    __u8  sbr_type;		/* sbr_type: 0-plain aac, 1-aac-v1, 2-aac-v2 */
+    __u8	outchmode;  	/* 0- mono, 1-stereo, 2-dual mono 3-Parametric stereo */
+    __u8  ps_present;
+
+};
+
+/* WMA Music Parameters Message */
+struct snd_wma_params {
+	__u16  codec;
+	__u8   num_chan;	/* 1=Mono, 2=Stereo */
+	__u8   pcm_wd_sz;	/* 16/24 - bit*/
+	__u32  brate; 	/* Use the hard coded value. */
+	__u32  sfreq;	/* Sampling freq eg. 8000, 441000, 48000 */
+	__u32  channel_mask;  /* Channel Mask */
+	__u16  format_tag;	/* Format Tag */
+	__u16  block_align;	/* packet size */
+	__u16  wma_encode_opt;/* Encoder option */
+	__u8 op_align;	/* op align 0- 16 bit, 1- MSB, 2 LSB */
+	__u8 pcm_src;	/* input pcm bit width */
+};
+
+/* Pre processing param structure */
+struct snd_prp_params {
+	__u32  reserved;	/* No pre-processing defined yet */
+};
+
+/* Post processing Capability info structure */
+struct snd_sst_postproc_info {
+	__u32 src_min;		/* Supported SRC Min sampling freq */
+	__u32 src_max;		/* Supported SRC Max sampling freq */
+	__u8  src;		/* 0=Not supported, 1=Supported */
+	__u8  bass_boost;		/* 0=Not Supported, 1=Supported */
+	__u8  stereo_widening;	/* 0=Not Supported, 1=Supported */
+	__u8  volume_control; 	/* 0=Not Supported, 1=Supported */
+	__s16 min_vol;		/* Minimum value of Volume in dB */
+	__s16 max_vol;		/* Maximum value of Volume in dB */
+	__u8 mute_control;	/* 0=No Mute, 1=Mute */
+	__u8 reserved1;
+	__u16 reserved2;
+};
+
+/* pre processing Capability info structure */
+struct snd_sst_prp_info {
+	__s16 min_vol;			/* Minimum value of Volume in dB */
+	__s16 max_vol;			/* Maximum value of Volume in dB */
+	__u8 volume_control; 		/* 0=Not Supported, 1=Supported */
+	__u8 reserved1;			/* for 32 bit alignment */
+	__u16 reserved2;		/* for 32 bit alignment */
+} __attribute__ ((packed));
+
+/* Firmware capabilities info */
+struct snd_sst_fw_info {
+	struct snd_sst_fw_version fw_version; /* Firmware version */
+	__u8 audio_codecs_supported[8];	/* Codecs supported by FW */
+	__u32 recommend_min_duration; /* Min duration for Lowpower Playback */
+	__u8 max_pcm_streams_supported; /* Max num of PCM streams supported */
+	__u8 max_enc_streams_supported;	/* Max number of Encoded streams  */
+	__u16 reserved;			/* 32 bit alignment*/
+	struct snd_sst_postproc_info pop_info; /* Post processing capability */
+	struct snd_sst_prp_info prp_info; /* pre_processing mod cap info */
+	struct snd_sst_port_info port_info[2]; /* Port info */
+	struct snd_sst_mix_info mix_info; 	/* Mixer info */
+	__u32 min_input_buf; /* minmum i/p buffer for decode */
+};
+
+/* Add the codec parameter structures for new codecs to be supported */
+#define CODEC_PARAM_STRUCTURES \
+	struct snd_pcm_params pcm_params; \
+	struct snd_mp3_params mp3_params; \
+	struct snd_aac_params aac_params; \
+	struct snd_wma_params wma_params;
+
+/* Pre and Post Processing param structures */
+#define PPP_PARAM_STRUCTURES \
+	struct snd_prp_params prp_params;
+
+/* Codec params struture */
+union  snd_sst_codec_params {
+	 CODEC_PARAM_STRUCTURES;
+};
+
+/* Pre-processing params struture */
+union snd_sst_ppp_params{
+	 PPP_PARAM_STRUCTURES;
+};
+
+struct snd_sst_stream_params {
+	union snd_sst_codec_params uc;
+} __attribute__ ((packed));
+
+struct snd_sst_params {
+	__u32 result;
+	__u32 stream_id;
+	__u8 codec;
+	__u8 ops;
+	__u8 stream_type;
+	struct snd_sst_stream_params sparams;
+};
+
+/* ioctl related stuff here */
+struct snd_sst_pmic_config {
+	__u32  sfreq;                /* Sampling rate in Hz */
+	__u16  num_chan;             /* Mono =1 or Stereo =2 */
+	__u16  pcm_wd_sz;            /* Number of bits per sample */
+} __attribute__ ((packed));
+
+struct snd_sst_get_stream_params {
+	struct snd_sst_params codec_params;
+	struct snd_sst_pmic_config pcm_params;
+};
+
+enum snd_sst_target_type {
+	SND_SST_TARGET_PMIC = 1,
+	SND_SST_TARGET_LPE,
+	SND_SST_TARGET_OTHER,
+};
+
+enum snd_sst_device_type {
+	SND_SST_DEVICE_SSP = 1,
+	SND_SST_DEVICE_PCM,
+	SND_SST_DEVICE_OTHER,
+};
+
+/*enum snd_sst_device_mode {
+	SND_SST_PCM_MODE_I2S = 0,
+	SND_SST_PCM_MODE_PCM1,
+};*/
+enum snd_sst_device_mode {
+
+	SND_SST_DEV_MODE_PCM_MODE1 = 1, /*(1 16-bit word, bit-length frame sync)*/
+	SND_SST_DEV_MODE_PCM_MODE2,
+	SND_SST_DEV_MODE_PCM_MODE3,
+	SND_SST_DEV_MODE_PCM_MODE4_RIGHT_JUSTIFIED,
+	SND_SST_DEV_MODE_PCM_MODE4_LEFT_JUSTIFIED,
+	SND_SST_DEV_MODE_PCM_MODE4_I2S, /*(I2S mode, 16-bit words)*/
+};
+
+enum snd_sst_port_action {
+	SND_SST_PORT_PREPARE = 1,
+	SND_SST_PORT_ACTIVATE,
+};
+
+/* Target selection per device structure */
+struct snd_sst_slot_info {
+	__u8 mix_enable;		/* Mixer enable or disable */
+	__u8 device_type;
+	__u8 device_instance; 	/* 0, 1, 2 */
+	__u8 target_type;
+	__u16 slot[2];
+	__u8 master;
+	__u8 action;
+	__u16 device_mode;
+	struct snd_sst_pmic_config pcm_params;
+} __attribute__ ((packed));
+
+#define SST_MAX_TARGET_DEVICES 3
+/* Target device list structure */
+struct snd_sst_target_device  {
+	__u32 device_route;
+	struct snd_sst_slot_info devices[SST_MAX_TARGET_DEVICES];
+} __attribute__ ((packed));
+
+struct snd_sst_driver_info {
+	__u32 version;	/* Version of the driver */
+	__u32 active_pcm_streams;
+	__u32 active_enc_streams;
+	__u32 max_pcm_streams;
+	__u32 max_enc_streams;
+	__u32 buf_per_stream;
+};
+
+struct snd_sst_vol {
+	__u32	stream_id;
+	__s32		volume;
+	__u32	ramp_duration;
+	__u32 ramp_type;		/* Ramp type, default=0 */
+};
+
+struct snd_sst_mute {
+	__u32	stream_id;
+	__u32	mute;
+};
+
+enum snd_sst_buff_type {
+	SST_BUF_USER = 1,
+	SST_BUF_MMAP,
+	SST_BUF_RAR,
+};
+
+struct snd_sst_mmap_buff_entry {
+	unsigned int offset;
+	unsigned int size;
+};
+
+struct snd_sst_mmap_buffs {
+	unsigned int entries;
+	enum snd_sst_buff_type type;
+	struct snd_sst_mmap_buff_entry *buff;
+};
+
+struct snd_sst_buff_entry {
+	void *buffer;
+	unsigned int size;
+};
+
+struct snd_sst_buffs {
+	unsigned int entries;
+	__u8 type;
+	struct snd_sst_buff_entry *buff_entry;
+};
+
+struct snd_sst_dbufs  {
+	unsigned long long input_bytes_consumed;
+	unsigned long long output_bytes_produced;
+	struct snd_sst_buffs *ibufs;
+	struct snd_sst_buffs *obufs;
+};
+
+/*IOCTL defined here */
+/*SST MMF IOCTLS only */
+#define SNDRV_SST_STREAM_SET_PARAMS _IOR('L', 0x00, \
+					struct snd_sst_stream_params *)
+#define SNDRV_SST_STREAM_GET_PARAMS _IOWR('L', 0x01, \
+					struct snd_sst_get_stream_params *)
+#define SNDRV_SST_STREAM_GET_TSTAMP _IOWR('L', 0x02, __u64 *)
+#define	SNDRV_SST_STREAM_DECODE	_IOWR('L', 0x03, struct snd_sst_dbufs *)
+#define SNDRV_SST_STREAM_BYTES_DECODED _IOWR('L', 0x04, __u64 *)
+#define SNDRV_SST_STREAM_START	_IO('A', 0x42)
+#define SNDRV_SST_STREAM_DROP 	_IO('A', 0x43)
+#define SNDRV_SST_STREAM_DRAIN	_IO('A', 0x44)
+#define SNDRV_SST_STREAM_PAUSE 	_IOW('A', 0x45, int)
+#define SNDRV_SST_STREAM_RESUME _IO('A', 0x47)
+#define SNDRV_SST_MMAP_PLAY	_IOW('L', 0x05, struct snd_sst_mmap_buffs *)
+#define SNDRV_SST_MMAP_CAPTURE _IOW('L', 0x06, struct snd_sst_mmap_buffs *)
+/*SST common ioctls */
+#define SNDRV_SST_DRIVER_INFO	_IOR('L', 0x10, struct snd_sst_driver_info *)
+#define SNDRV_SST_SET_VOL	_IOW('L', 0x11, struct snd_sst_vol *)
+#define SNDRV_SST_GET_VOL	_IOW('L', 0x12, struct snd_sst_vol *)
+#define SNDRV_SST_MUTE		_IOW('L', 0x13, struct snd_sst_mute *)
+/*AM Ioctly only */
+#define SNDRV_SST_FW_INFO	_IOR('L', 0x20,  struct snd_sst_fw_info *)
+#define SNDRV_SST_SET_TARGET_DEVICE _IOW('L', 0x21, \
+					struct snd_sst_target_device *)
+
+#endif /* __INTEL_SST_IOCTL_H__ */
diff --git a/sound/pci/sst/intel_sst_interface.c b/sound/pci/sst/intel_sst_interface.c
new file mode 100644
index 0000000..5f84245
--- /dev/null
+++ b/sound/pci/sst/intel_sst_interface.c
@@ -0,0 +1,2099 @@
+/*
+ *  intel_sst_interface.c - Intel SST Driver for audio engine
+ *
+ *  Copyright (C) 2008-10 	Intel Corporation
+ *  Authors:	Vinod Koul <vinod.koul@intel.com>
+ *  			Harsha Priya <priya.harsha@intel.com>
+ *				Dharageswari R <dharageswari.r@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.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *  This driver exposes the audio engine functionalities to the ALSA
+ *	and middleware.
+ *  Upper layer interfaces (MAD driver, MMF) to SST driver
+ */
+
+#include <linux/cdev.h>
+#include <linux/pci.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/syscalls.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/fcntl.h>
+#include <linux/uaccess.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/mm.h>
+#include <linux/workqueue.h>
+#include <linux/pci.h>
+#include <linux/firmware.h>
+#include <linux/ioctl.h>
+#include <linux/rar/rar_register.h>
+#include <linux/rar/memrar.h>
+#include <asm/div64.h>
+#include <sound/intel_lpe.h>
+#include <sound/intel_sst_ioctl.h>
+#include "intel_sst_fw_ipc.h"
+#include "intel_sst_common.h"
+
+#define AM_MODULE 1
+#define STREAM_MODULE 0
+
+/**
+* This function is called when the FW needs to be downloaded to SST DSP engine
+*/
+static int sst_download_fw(void)
+{
+	int retval;
+	const struct firmware *fw_sst;
+
+	printk(KERN_DEBUG "SST DBG:SST Downloading FW now...\n");
+	retval = request_firmware(&fw_sst,
+				SST_FW_STD_FILENAME,
+				&sst_drv_ctx->pci->dev);
+	if (retval) {
+		printk(KERN_ERR
+			"SST ERR: req fw failed %d \n", retval);
+		return retval;
+	}
+	sst_drv_ctx->alloc_block[0].sst_id = FW_DWNL_ID;
+	retval = sst_load_fw(fw_sst, NULL);
+	if (retval)
+		goto end_restore;
+
+	sst_drv_ctx->alloc_block[0].ops_block.condition = false;
+	retval = sst_wait_timeout(sst_drv_ctx, &sst_drv_ctx->alloc_block[0]);
+	if (retval)
+		printk(KERN_ERR
+			"SST ERR: fw download failed %d \n" , retval);
+end_restore:
+	release_firmware(fw_sst);
+	sst_drv_ctx->alloc_block[0].sst_id = BLOCK_UNINIT;
+	return retval;
+}
+
+/**
+* intel_sst_open - opens a handle to driver
+* @i_node:	inode structure
+* @file_ptr:pointer to file
+*
+* This function is called by OS when a user space component
+* tries to get a driver handle. Only one handle at a time
+* will be allowed
+*/
+int intel_sst_open(struct inode *i_node, struct file *file_ptr)
+{
+	dev_t device = i_node->i_rdev;
+	unsigned int retval = 0;
+
+	if (sst_drv_ctx->pmic_state != SND_MAD_INIT_DONE) {
+		printk(KERN_ERR
+			"SST ERR: Sound card not availble \n ");
+		return -EIO;
+	}
+
+	if (sst_drv_ctx->sst_state == SST_UN_INIT) {
+		/* FW is not downloaded */
+		retval = sst_download_fw();
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: FW download failed...abort\n");
+			return -ENODEV;
+		}
+	}
+	if (device == MKDEV(INTEL_SST_MAJOR, 0)) {
+		/* app open */
+		mutex_lock(&sst_drv_ctx->stream_cnt_lock);
+		if (sst_drv_ctx->encoded_cnt < MAX_ENC_STREAM) {
+			struct ioctl_pvt_data *data =
+				kzalloc(sizeof(struct ioctl_pvt_data),
+						GFP_KERNEL);
+			if (!data) {
+				printk(KERN_ERR
+					"SST ERR:error rsrvin data mry\n");
+				mutex_unlock(&sst_drv_ctx->stream_cnt_lock);
+				return -ENOMEM;
+			}
+
+
+			sst_drv_ctx->encoded_cnt++;
+			/*sst_drv_ctx->stream_cnt++;*/
+			mutex_unlock(&sst_drv_ctx->stream_cnt_lock);
+			data->pvt_id = sst_assign_pvt_id(sst_drv_ctx);
+			data->str_id = 0;
+			file_ptr->private_data = (void *)data;
+			printk(KERN_DEBUG "SST DBG:sst id allocated = %d!\n", data->pvt_id);
+		} else
+			retval = -EACCES;
+	} else if (device == MKDEV(INTEL_SST_MAJOR, 1)) {
+		/* audio manager open */
+		mutex_lock(&sst_drv_ctx->stream_cnt_lock);
+		if (sst_drv_ctx->am_cnt < MAX_AM_HANDLES) {
+			sst_drv_ctx->am_cnt++;
+			printk(KERN_DEBUG "SST DBG:AM handle opened...\n");
+		} else
+			retval = -EACCES;
+
+		mutex_unlock(&sst_drv_ctx->stream_cnt_lock);
+	} else
+		retval = -EINVAL;
+	return retval;
+}
+
+void free_stream_context(unsigned int str_id)
+{
+	struct stream_info *stream;
+
+	if (!sst_validate_strid(str_id)) {
+		/* str_id is valid, so stream is alloacted */
+		stream = &sst_drv_ctx->streams[str_id];
+		if (stream->ops == STREAM_OPS_PLAYBACK ||
+				stream->ops == STREAM_OPS_PLAYBACK_DRM) {
+				sst_drv_ctx->pb_streams--;
+			if (sst_drv_ctx->pb_streams == 0 && sst_drv_ctx->cp_streams > 0)
+				sst_drv_ctx->scard_ops->power_down_pmic_pb();
+		} else if (stream->ops == STREAM_OPS_CAPTURE) {
+			sst_drv_ctx->cp_streams--;
+			if (sst_drv_ctx->cp_streams == 0 && sst_drv_ctx->pb_streams > 0)
+				sst_drv_ctx->scard_ops->power_down_pmic_cp();
+		}
+#ifdef CONFIG_MSTWN_POWER_MGMT
+		if(stream->codec == SST_CODEC_TYPE_MP3){
+			sst_drv_ctx->lpaudio_start--;
+			if(!sst_drv_ctx->lpaudio_start) {
+				sst_ospm_send_event(OSPM_EVENT_LPAUDIO_STOP);
+				printk(KERN_DEBUG "SST DBG:Free_stream:lpaudio_start:%d", sst_drv_ctx->lpaudio_start);
+				printk(KERN_DEBUG "SST DBG:Free_stream:Sending OSPM_EVENT_LPAUDIO_STOP...\n");
+			}
+		}else {
+			sst_drv_ctx->audio_start--;
+			if(!sst_drv_ctx->audio_start) {
+				sst_ospm_send_event(OSPM_EVENT_SUBSYS_STOP_PLAY);
+				printk(KERN_DEBUG "SST DBG:Free_stream:audio_start:%d", sst_drv_ctx->audio_start);
+				printk(KERN_DEBUG "SST DBG:Free_stream:Sending OSPM_EVENT_SUBSYS_STOP_PLAY...\n");
+			}
+		}
+#endif
+		if(sst_drv_ctx->pb_streams == 0 &&
+							sst_drv_ctx->cp_streams == 0) {
+			sst_drv_ctx->scard_ops->power_down_pmic();
+		}
+
+		if (sst_free_stream(str_id))
+			sst_clean_stream(&sst_drv_ctx->streams[str_id]);
+	}
+}
+
+/**
+* intel_sst_release - releases a handle to driver
+* @i_node:	inode structure
+* @file_ptr:	pointer to file
+*
+* This function is called by OS when a user space component
+* tries to release a driver handle.
+*/
+int intel_sst_release(struct inode *i_node, struct file *file_ptr)
+{
+	dev_t device = i_node->i_rdev;
+
+	printk(KERN_DEBUG "SST DBG:Release called \n");
+	if (device == MKDEV(INTEL_SST_MAJOR, 0)) {
+		struct ioctl_pvt_data *data =
+			(struct ioctl_pvt_data *)file_ptr->private_data;
+
+		/* app close */
+		printk(KERN_DEBUG "SST DBG:Closing app handle \n");
+		mutex_lock(&sst_drv_ctx->stream_cnt_lock);
+		sst_drv_ctx->encoded_cnt--;
+		sst_drv_ctx->stream_cnt--;
+		mutex_unlock(&sst_drv_ctx->stream_cnt_lock);
+		free_stream_context(data->str_id);
+		kfree(data);
+	} else if (device == MKDEV(INTEL_SST_MAJOR, 1)) {
+		/* audio manager close */
+		mutex_lock(&sst_drv_ctx->stream_cnt_lock);
+		sst_drv_ctx->am_cnt--;
+		mutex_unlock(&sst_drv_ctx->stream_cnt_lock);
+		printk(KERN_DEBUG "SST DBG:AM handle closed \n");
+	}
+	return 0;
+}
+
+/**
+* intel_sst_mmap - mmaps a kernel buffer to user space for copying data
+* @vma:		vm area structure instance
+* @file_ptr:	pointer to file
+*
+* This function is called by OS when a user space component
+* tries to get mmap memory from driver
+*/
+int intel_sst_mmap(struct file *file_ptr, struct vm_area_struct *vma)
+{
+	int retval, length;
+	struct ioctl_pvt_data *data =
+		(struct ioctl_pvt_data *)file_ptr->private_data;
+	int str_id = data->str_id;
+	void *mem_area;
+
+	retval = sst_validate_strid(str_id);
+	if (retval)
+		return -EINVAL;
+
+	length = vma->vm_end - vma->vm_start;
+	printk(KERN_DEBUG "SST DBG:called for stream %d length 0x%x\n", str_id, length);
+
+	if (length > sst_drv_ctx->mmap_len)
+		return -ENOMEM;
+	if (!sst_drv_ctx->mmap_mem)
+		return -EIO;
+
+	/* round it up to the page bondary  */
+	/*mem_area = (void *)((((unsigned long)sst_drv_ctx->mmap_mem)
+				+ PAGE_SIZE - 1) & PAGE_MASK);*/
+	mem_area = (void *) PAGE_ALIGN((unsigned int) sst_drv_ctx->mmap_mem);
+
+	/* map the whole physically contiguous area in one piece  */
+	retval = remap_pfn_range(vma,
+			vma->vm_start,
+			virt_to_phys((void *)mem_area) >> PAGE_SHIFT,
+			length,
+			vma->vm_page_prot);
+	if (retval) {
+		sst_drv_ctx->streams[str_id].mmapped = false;
+		printk(KERN_ERR "SST ERR: mapping failed %d ",retval);
+	} else
+		sst_drv_ctx->streams[str_id].mmapped = true;
+
+	printk(KERN_DEBUG "SST DBG:mmap ret 0x%x \n", retval);
+	return retval;
+}
+
+/**
+* intel_sst_mmap_play_capture - sets mmap data buffers to play/capture
+*/
+static int intel_sst_mmap_play_capture(u32 str_id,
+		struct snd_sst_mmap_buffs *mmap_buf)
+{
+	struct sst_stream_bufs *bufs;
+	int retval, i;
+	struct stream_info *stream;
+	struct snd_sst_mmap_buff_entry *buf_entry;
+
+	printk(KERN_DEBUG "SST DBG:called for str_id %d \n", str_id);
+	retval = sst_validate_strid(str_id);
+	if (retval) {
+		printk(KERN_ERR "SST ERR: val +\
+			failed %d ", retval);
+		return -EINVAL;
+	}
+	BUG_ON(!mmap_buf);
+
+	stream = &sst_drv_ctx->streams[str_id];
+	if (stream->mmapped != true) {
+		printk(KERN_ERR "SST ERR: stream not mapped! ");
+		return -EIO;
+	}
+
+	if (stream->status == STREAM_UN_INIT ||
+		stream->status == STREAM_DECODE) {
+		printk(KERN_ERR
+			"SST ERR: BAD REQUEST!, streamstate +\
+			is %d\n", stream->status);
+		return -EBADRQC;
+	}
+	stream->curr_bytes = 0;
+	stream->cumm_bytes = 0;
+
+	printk(KERN_DEBUG "SST DBG:new buffers count %d status %d\n",
+			mmap_buf->entries, stream->status);
+	buf_entry = mmap_buf->buff;
+	for (i = 0; i < mmap_buf->entries; i++) {
+		BUG_ON(!buf_entry);
+		bufs = kzalloc(sizeof(*bufs), GFP_KERNEL);
+		if (!bufs) {
+			printk(KERN_ERR
+				"SST ERR: mem allocation failed \n ");
+			return -ENOMEM;
+		}
+		bufs->size = buf_entry->size;
+		bufs->offset = buf_entry->offset;
+		bufs->addr = sst_drv_ctx->mmap_mem;
+		bufs->in_use = false;
+		buf_entry++;
+		/* locking here */
+		mutex_lock(&stream->lock);
+		list_add_tail(&bufs->node, &stream->bufs);
+		mutex_unlock(&stream->lock);
+	}
+
+	mutex_lock(&stream->lock);
+	stream->data_blk.condition = false;
+	stream->data_blk.ret_code = 0;
+	if (stream->status == STREAM_INIT &&
+			stream->prev != STREAM_UN_INIT &&
+			stream->need_draining != true) {
+		stream->prev = stream->status;
+		stream->status = STREAM_RUNNING;
+		if (stream->ops == STREAM_OPS_PLAYBACK) {
+			printk(KERN_DEBUG "SST DBG:play frames...\n");
+			if (sst_play_frame(str_id) < 0) {
+				printk(KERN_ERR
+					"SST ERR: play frames failed \n");
+				mutex_unlock(&stream->lock);
+				return -EIO;
+			}
+		} else if (stream->ops == STREAM_OPS_CAPTURE) {
+			printk(KERN_DEBUG "SST DBG:capture frames...\n");
+			if (sst_capture_frame(str_id) < 0) {
+				printk(KERN_ERR
+					"SST ERR: capture frames failed \n");
+				mutex_unlock(&stream->lock);
+				return -EIO;
+			}
+		}
+	}
+	mutex_unlock(&stream->lock);
+	/* Block the call for reply */
+	if (!list_empty(&stream->bufs)) {
+		printk(KERN_DEBUG "SST DBG:ioctl waiting...\n");
+		stream->data_blk.on = true;
+		retval = sst_wait_interruptible(sst_drv_ctx,
+					&stream->data_blk);
+	}
+
+	if (retval >= 0)
+		retval = stream->cumm_bytes;
+	printk(KERN_DEBUG "SST DBG:end of play/rec +\
+		ioctl bytes = %d!!\n", retval);
+	return retval;
+}
+
+/**
+* intel_sst_play_capture - sets user data buffers to play/capture
+*/
+static int intel_sst_play_capture(struct stream_info *stream, int str_id)
+{
+	int retval;
+
+	stream->data_blk.ret_code = 0;
+	stream->data_blk.on = true;
+	stream->data_blk.condition = false;
+
+	mutex_lock(&stream->lock);
+	if (stream->status == STREAM_INIT && stream->prev != STREAM_UN_INIT) {
+		/* stream is started */
+		stream->prev = stream->status;
+		stream->status = STREAM_RUNNING;
+	}
+
+	if (stream->status == STREAM_INIT && stream->prev == STREAM_UN_INIT) {
+		/* stream is not started yet */
+		printk(KERN_DEBUG "SST DBG:Stream isnt started yet state %d, prev %d \n",
+			stream->status, stream->prev);
+	} else if ((stream->status == STREAM_RUNNING ||
+			stream->status == STREAM_PAUSED) &&
+			stream->need_draining != true) {
+		/* stream is started */
+		if (stream->ops == STREAM_OPS_PLAYBACK ||
+				stream->ops == STREAM_OPS_PLAYBACK_DRM) {
+			if (sst_play_frame(str_id) < 0) {
+				printk(KERN_ERR
+					"SST ERR: play frames failed \n");
+				mutex_unlock(&stream->lock);
+				return -EIO;
+			}
+		} else if (stream->ops == STREAM_OPS_CAPTURE) {
+			if (sst_capture_frame(str_id) < 0) {
+				printk(KERN_ERR
+					"SST ERR: capture frames failed \n ");
+				mutex_unlock(&stream->lock);
+				return -EIO;
+			}
+		}
+	} else {
+		printk(KERN_ERR
+			"SST ERR: Streamstate %d invalid,prev %d\n",\
+				stream->status, stream->prev);
+		mutex_unlock(&stream->lock);
+		return -EIO;
+	}
+	mutex_unlock(&stream->lock);
+	/* Block the call for reply */
+	printk(KERN_DEBUG "SST DBG:write waiting...\n");
+
+	retval = sst_wait_interruptible(sst_drv_ctx, &stream->data_blk);
+	if (retval) {
+		stream->status = STREAM_INIT;
+		printk(KERN_DEBUG "SST DBG:wait returned error...\n");
+	}
+	printk(KERN_DEBUG "SST DBG:write returning\n");
+	return retval;
+}
+
+/**
+* snd_sst_fill_kernel_list - fills kernel list with buffer addresses for
+* SST DSP driver to process
+*/
+static int snd_sst_fill_kernel_list(struct stream_info *stream,
+			const struct iovec *iovec, unsigned long nr_segs,
+			struct list_head *copy_to_list)
+{
+	struct sst_stream_bufs *stream_bufs;
+	unsigned long index, data_not_copied, mmap_len;
+	unsigned char *bufp;
+	unsigned long size, copied_size;
+	int retval = 0, add_to_list = 0;
+	static int sent_offset;
+	static unsigned long sent_index;
+
+	stream_bufs = kzalloc(sizeof(*stream_bufs), GFP_KERNEL);
+	if (!stream_bufs) {
+		printk(KERN_ERR
+			"SST ERR: memory allocation failed \n ");
+		return -ENOMEM;
+	}
+	stream_bufs->addr = sst_drv_ctx->mmap_mem;
+	if (stream->ops == STREAM_OPS_PLAYBACK_DRM) {
+		for (index = stream->sg_index; index < nr_segs; index++) {
+			__u32 rar_handle;
+			struct sst_stream_bufs *stream_bufs =
+					kzalloc(sizeof(*stream_bufs), GFP_KERNEL);
+
+			stream->sg_index = index;
+			if (!stream_bufs) {
+				printk(KERN_ERR
+					"SST ERR: mry alocation failed \n");
+				return -ENOMEM;
+			}
+			retval = copy_from_user((void *) &rar_handle,
+						iovec[index].iov_base,
+						sizeof(__u32));
+			if (retval != 0) {
+				printk(KERN_ERR
+					"SST ERR: copy from user +\
+					failed\n");
+				return -EIO;
+			}
+			stream_bufs->addr = (char *)rar_handle;
+			printk(KERN_DEBUG "SST DBG:rar handle +\
+				received = 0x%x\n", (__u32)stream_bufs->addr);
+			stream_bufs->in_use = false;
+			stream_bufs->size = iovec[0].iov_len;
+			printk(KERN_DEBUG "size = 0x%x", stream_bufs->size);
+			/* locking here */
+			mutex_lock(&stream->lock);
+			list_add_tail(&stream_bufs->node, &stream->bufs);
+			mutex_unlock(&stream->lock);
+		}
+		stream->sg_index = index;
+		return retval;
+	}
+	mmap_len = sst_drv_ctx->mmap_len;
+	stream_bufs->addr = sst_drv_ctx->mmap_mem;
+	bufp = stream->cur_ptr;
+
+	printk(KERN_DEBUG "SST DBG:mmap_len - %lx\n", mmap_len);
+	copied_size = 0;
+
+	if (!stream->sg_index)
+		sent_index = sent_offset = 0;
+
+	for (index = stream->sg_index; index < nr_segs; index++) {
+		stream->sg_index = index;
+		printk(KERN_DEBUG "SST DBG:index - %lx, cur_ptr - %p\n", index, stream->cur_ptr);
+		printk(KERN_DEBUG "SST DBG:base - %p, size - 0x%x\n", iovec[index].iov_base,
+				iovec[index].iov_len);
+		printk(KERN_DEBUG "SST DBG:bufp - %p\n", bufp);
+		if (!stream->cur_ptr)
+			bufp = iovec[index].iov_base;
+
+		size = ((unsigned long)iovec[index].iov_base
+			+ iovec[index].iov_len) - (unsigned long) bufp;
+
+		printk(KERN_DEBUG "SST DBG:size - %lx\n", size);
+		if ((copied_size + size) > mmap_len)
+			size = mmap_len - copied_size;
+
+		printk(KERN_DEBUG "SST DBG:size - %lx\n", size);
+
+		if (stream->ops == STREAM_OPS_PLAYBACK) {
+			printk(KERN_DEBUG "SST DBG:Playback stream copying now....\n");
+			data_not_copied = copy_from_user(
+				(void *)(stream_bufs->addr + copied_size),
+				bufp, size);
+			if (data_not_copied > 0) {
+				/* Clean up the list and return error code */
+				printk(KERN_ERR
+				"SST ERR: cpyfrmusr not coped -%ld", data_not_copied);
+				retval = -EIO;
+				break;
+			}
+		} else if (stream->ops == STREAM_OPS_CAPTURE) {
+			struct snd_sst_user_cap_list *entry =
+				kzalloc(sizeof(*entry), GFP_KERNEL);
+
+			if (!entry) {
+				printk(KERN_ERR
+					"SST ERR: mem allocation failed \n");
+				/* FIXME cleanup prev */
+				return -ENOMEM;
+			}
+			entry->iov_index = index;
+			entry->iov_offset = (unsigned long) bufp -
+					(unsigned long)iovec[index].iov_base;
+			entry->offset = copied_size;
+			entry->size = size;
+			printk(KERN_DEBUG "SST DBG:ENTRY:ioindx %d,iooff %ld,koff %ld,ksz %ld \n",
+				entry->iov_index, entry->iov_offset,
+				entry->offset, entry->size);
+			list_add_tail(&entry->node, copy_to_list);
+		}
+
+		printk(KERN_DEBUG "SST DBG:cur_ptr - %lx\n", (unsigned long) stream->cur_ptr);
+		stream->cur_ptr = bufp + size;
+
+		if (((unsigned long)iovec[index].iov_base
+			+ iovec[index].iov_len) < ((unsigned long)iovec[index].iov_base) ) {
+			printk(KERN_DEBUG "SST DBG:Buffer overflows");
+					return -EINVAL;
+		}
+
+		if (((unsigned long)iovec[index].iov_base
+					+ iovec[index].iov_len) ==
+					(unsigned long)stream->cur_ptr) {
+			stream->cur_ptr = NULL;
+			stream->sg_index++;
+		}
+
+		copied_size += size;
+		printk(KERN_DEBUG "SST DBG:copied_size - %lx\n", copied_size);
+		if ((copied_size >= mmap_len) ||
+				(stream->sg_index == nr_segs)) {
+			add_to_list = 1;
+		}
+
+		if (add_to_list) {
+			stream_bufs->in_use = false;
+			stream_bufs->size = copied_size;
+			/* locking here */
+			mutex_lock(&stream->lock);
+			list_add_tail(&stream_bufs->node, &stream->bufs);
+			mutex_unlock(&stream->lock);
+			break;
+		}
+	}
+	return retval;
+}
+
+/**
+* snd_sst_copy_userbuf_capture - This function copies the captured data
+* returned from SST DSP engine to the user buffers
+*/
+static int snd_sst_copy_userbuf_capture(struct stream_info *stream,
+			const struct iovec *iovec,
+			struct list_head *copy_to_list)
+{
+	struct snd_sst_user_cap_list *entry, *_entry;
+	struct sst_stream_bufs *kbufs = NULL, *_kbufs;
+	int retval = 0;
+	unsigned long data_not_copied;
+
+	/* copy sent buffers */
+	/* FIXME optimze */
+	printk(KERN_DEBUG "SST DBG:capture stream copying to user now...\n");
+	list_for_each_entry_safe(kbufs, _kbufs, &stream->bufs, node) {
+		if (kbufs->in_use == true) {
+			/* copy to user */
+			list_for_each_entry_safe(entry, _entry,
+						copy_to_list, node) {
+				printk(KERN_DEBUG "SST DBG:filling now... \n");
+				printk(KERN_DEBUG "SST DBG:iindx %d,ioff %ld,koff %ld,ksz %ld \n",
+					entry->iov_index, entry->iov_offset,
+					entry->offset, entry->size);
+				printk(KERN_DEBUG "SST DBG:Copying at %p size %lx\n",
+					iovec[entry->iov_index].iov_base +
+						entry->iov_offset,
+					entry->size);
+				data_not_copied = copy_to_user((void *)
+					iovec[entry->iov_index].iov_base +
+						entry->iov_offset,
+					kbufs->addr + entry->offset,
+					entry->size);
+				if (data_not_copied > 0) {
+					/* Clean up the list and return error */
+					printk(KERN_ERR
+						"SST ERR: copy to user err -%ld\n ", data_not_copied);
+					retval = -EIO;
+					break;
+				}
+				list_del(&entry->node);
+				kfree(entry);
+			}
+			printk(KERN_DEBUG "SST DBG:coming out of loop\n");
+		}
+	}
+	printk(KERN_DEBUG "SST DBG:end of cap copy\n");
+	return retval;
+}
+
+/*
+ * snd_sst_userbufs_play_cap - constructs the list from user buffers
+ * @iovec:      pointer to iovec structure
+ * @nr_segs:    number entries in the iovec structure
+ * @str_id:	stream id
+ * @stream:   	pointer to stream_info structure
+ * This function will traverse the user list and copy the data to the kernel
+ * space buffers.
+ */ /* FIXME cleanups in this fn no mem leaks due to link list  */
+static int snd_sst_userbufs_play_cap(const struct iovec *iovec,
+			unsigned long nr_segs, unsigned int str_id,
+			struct stream_info *stream)
+{
+	int retval;
+	LIST_HEAD(copy_to_list);
+
+
+	retval = snd_sst_fill_kernel_list(stream, iovec, nr_segs,
+		       &copy_to_list);
+
+	retval = intel_sst_play_capture(stream, str_id);
+	if (retval < 0)
+		return retval;
+
+	if (stream->ops == STREAM_OPS_CAPTURE) {
+		retval = snd_sst_copy_userbuf_capture(stream, iovec,
+				&copy_to_list);
+	}
+	return retval;
+}
+
+/**
+* intel_sst_read_write - This function is common function across read/write
+* for user buffers called from system calls
+*/
+static int intel_sst_read_write(unsigned int str_id, char __user *buf,
+					size_t count)
+{
+	int retval;
+	struct stream_info *stream;
+	struct iovec iovec;
+	unsigned long nr_segs;
+
+	retval = sst_validate_strid(str_id);
+	if (retval)
+		return -EINVAL;
+	stream = &sst_drv_ctx->streams[str_id];
+	if (stream->mmapped == true) {
+		printk(KERN_ERR
+			"SST ERR: user write and stream is mapped");
+		return -EIO;
+	}
+	if (!count) {
+		printk(KERN_ERR
+		"SST ERR: args invalid %d", retval);
+		return -EINVAL;
+	}
+	stream->curr_bytes = 0;
+	stream->cumm_bytes = 0;
+	/* copy user buf details */
+	printk(KERN_DEBUG "SST DBG:new buffers %p, copy size %d, status %d\n" ,
+			buf, (int) count, (int) stream->status);
+
+	stream->buf_type = SST_BUF_USER_STATIC;
+	iovec.iov_base = (void *)buf;
+	iovec.iov_len  = count;
+	nr_segs = 1;
+
+	do {
+		retval = snd_sst_userbufs_play_cap(&iovec, nr_segs,
+						str_id, stream);
+
+		if (retval < 0)
+			break;
+
+	} while (stream->sg_index < nr_segs);
+
+	stream->sg_index = 0;
+	stream->cur_ptr = NULL;
+	if (retval >= 0)
+		retval = stream->cumm_bytes;
+	printk(KERN_DEBUG "SST DBG:end of play/rec bytes = %d!!\n", retval);
+	return retval;
+}
+
+/*
+ * intel_sst_write - This function is called when user tries to play out data
+ * @file_ptr:    pointer to file
+ * @buf:   	 user buffer to be played out
+ * @count:	 size of tthe buffer
+ * @offset:   	 offset to start from
+ */
+int intel_sst_write(struct file *file_ptr, const char __user *buf,
+			size_t count, loff_t *offset)
+{
+	struct ioctl_pvt_data *data =
+			(struct ioctl_pvt_data *)file_ptr->private_data;
+	int str_id = data->str_id;
+	struct stream_info *stream = &sst_drv_ctx->streams[str_id];
+
+	printk(KERN_DEBUG "SST DBG:called for %d\n", str_id);
+	if (stream->status == STREAM_UN_INIT ||
+		stream->status == STREAM_DECODE) {
+		printk(KERN_ERR "SST ERR: BAD REQUEST ");
+		return -EBADRQC;
+	}
+	return intel_sst_read_write(str_id, (char __user *)buf, count);
+}
+
+/*
+ * intel_sst_aio_write - This function is called when user tries to play out
+ * multiple data buffers
+ * @kiocb:    	 pointer to a structure containing file pointer
+ * @iov:   	 list of user buffer to be played out
+ * @nr_segs:	 number of entries
+ * @offset:   	 offset to start from
+ */
+ssize_t intel_sst_aio_write(struct kiocb *kiocb, const struct iovec *iov,
+			unsigned long nr_segs, loff_t  offset)
+{
+	int retval;
+	struct ioctl_pvt_data *data =
+			(struct ioctl_pvt_data *)kiocb->ki_filp->private_data;
+	int str_id = data->str_id;
+	struct stream_info *stream;
+
+	printk(KERN_DEBUG "SST DBG:entry - %ld\n", nr_segs);
+
+	if (is_sync_kiocb(kiocb) == false) {
+		printk(KERN_ERR
+		"SST ERR: aio_writ frm userspace is not alowed\n");
+		return -EINVAL;
+	}
+
+	printk(KERN_DEBUG "SST DBG:called for str_id %d \n", str_id);
+	retval = sst_validate_strid(str_id);
+	if (retval) {
+		printk(KERN_ERR
+			"SST ERR: invalid stream id \n ");
+		return -EINVAL;
+	}
+	stream = &sst_drv_ctx->streams[str_id];
+	if (stream->mmapped == true) {
+		printk(KERN_ERR
+			"SST ERR: user write & stream is mapped");
+		return -EIO;
+	}
+	if (stream->status == STREAM_UN_INIT ||
+		stream->status == STREAM_DECODE) {
+		printk(KERN_ERR "SST ERR: BAD REQUEST");
+		return -EBADRQC;
+	}
+	stream->curr_bytes = 0;
+	stream->cumm_bytes = 0;
+	printk(KERN_DEBUG "SST DBG:new segs %ld, offset %d, status %d\n" ,
+			nr_segs, (int) offset, (int) stream->status);
+	stream->buf_type = SST_BUF_USER_STATIC;
+	do {
+		retval = snd_sst_userbufs_play_cap(iov, nr_segs,
+						str_id, stream);
+		if (retval < 0)
+			break;
+
+	} while (stream->sg_index < nr_segs);
+
+	stream->sg_index = 0;
+	stream->cur_ptr = NULL;
+	if (retval >= 0)
+		retval = stream->cumm_bytes;
+	printk(KERN_DEBUG "SST DBG:end of play/rec bytes = %d!!\n", retval);
+	return retval;
+}
+
+/*
+ * intel_sst_read - This function is called when user tries to capture data
+ * @file_ptr:    pointer to file
+ * @buf:   	 user buffer to be filled with captured data
+ * @count:	 size of tthe buffer
+ * @offset:   	 offset to start from
+ */
+int intel_sst_read(struct file *file_ptr, char __user *buf,
+			size_t count, loff_t *offset)
+{
+	struct ioctl_pvt_data *data =
+			(struct ioctl_pvt_data *)file_ptr->private_data;
+	int str_id = data->str_id;
+	struct stream_info *stream = &sst_drv_ctx->streams[str_id];
+
+	printk(KERN_DEBUG "SST DBG:called for %d\n", str_id);
+	if (stream->status == STREAM_UN_INIT ||
+		stream->status == STREAM_DECODE) {
+		printk(KERN_ERR"SST ERR: BAD REQUEST!\n");
+		return -EBADRQC;
+	}
+	return intel_sst_read_write(str_id, buf, count);
+}
+
+/*
+ * intel_sst_aio_read - This function is called when user tries to capture out
+ * multiple data buffers
+ * @kiocb:    	 pointer to a structure containing file pointer
+ * @iov:   	 list of user buffer to be filled with captured
+ * @nr_segs:	 number of entries
+ * @offset:   	 offset to start from
+ */
+
+ssize_t intel_sst_aio_read(struct kiocb *kiocb, const struct iovec *iov,
+			 unsigned long nr_segs, loff_t offset)
+{
+	int retval;
+	struct ioctl_pvt_data *data =
+			(struct ioctl_pvt_data *)kiocb->ki_filp->private_data;
+	int str_id = data->str_id;
+	struct stream_info *stream;
+
+	printk(KERN_DEBUG "SST DBG:entry - %ld\n", nr_segs);
+
+	if (is_sync_kiocb(kiocb) == false) {
+		printk(KERN_DEBUG "SST DBG:aio_read from user space is not allowed\n");
+		return -EINVAL;
+	}
+
+	printk(KERN_DEBUG "SST DBG:called for str_id %d \n", str_id);
+	retval = sst_validate_strid(str_id);
+	if (retval)
+		return -EINVAL;
+	stream = &sst_drv_ctx->streams[str_id];
+	if (stream->mmapped == true) {
+		printk(KERN_ERR
+			"SST ERR: user write stream is mapped!!! ");
+		return -EIO;
+	}
+	if (stream->status == STREAM_UN_INIT ||
+		stream->status == STREAM_DECODE) {
+		printk(KERN_ERR "SST ERR: BAD REQUEST!\n ");
+		return -EBADRQC;
+	}
+	stream->curr_bytes = 0;
+	stream->cumm_bytes = 0;
+
+	printk(KERN_DEBUG "SST DBG:new segs %ld, offset %d, status %d\n" ,
+			nr_segs, (int) offset, (int) stream->status);
+	stream->buf_type = SST_BUF_USER_STATIC;
+	do {
+		retval = snd_sst_userbufs_play_cap(iov, nr_segs,
+						str_id, stream);
+		if (retval < 0)
+			break;
+
+	} while (stream->sg_index < nr_segs);
+
+	stream->sg_index = 0;
+	stream->cur_ptr = NULL;
+	if (retval >= 0)
+		retval = stream->cumm_bytes;
+	printk(KERN_DEBUG "SST DBG:end of play/rec bytes = %d!!\n", retval);
+	return retval;
+}
+
+/*
+ * sst_print_stream_params - prints the stream parameters (debug fn)
+ */
+static void sst_print_stream_params(struct snd_sst_get_stream_params *get_prm)
+{
+	printk(KERN_DEBUG "SST DBG:codec params:result =%d\n",
+				get_prm->codec_params.result);
+	printk(KERN_DEBUG "SST DBG:codec params:stream = %d\n",
+				get_prm->codec_params.stream_id);
+	printk(KERN_DEBUG "SST DBG:codec params:codec = %d\n",
+				get_prm->codec_params.codec);
+	printk(KERN_DEBUG "SST DBG:codec params:ops = %d\n",
+				get_prm->codec_params.ops);
+	printk(KERN_DEBUG "SST DBG:codec params:stream_type= %d\n",
+				get_prm->codec_params.stream_type);
+	printk(KERN_DEBUG "SST DBG:pcmparams:sfreq= %d\n",
+				get_prm->pcm_params.sfreq);
+	printk(KERN_DEBUG "SST DBG:pcmparams:num_chan= %d\n",
+				get_prm->pcm_params.num_chan);
+	printk(KERN_DEBUG "SST DBG:pcmparams:pcm_wd_sz= %d\n",
+				get_prm->pcm_params.pcm_wd_sz);
+	return;
+}
+
+/*
+ * sst_print_fw_info - prints the firmware information (debug fn)
+ */
+static void sst_print_fw_info(struct snd_sst_fw_info *fw_info)
+{
+	printk(KERN_DEBUG "SST DBG:build = %d\n", fw_info->fw_version.build);
+	printk(KERN_DEBUG "SST DBG:minor = %d\n", fw_info->fw_version.minor);
+	printk(KERN_DEBUG "SST DBG:major= %d\n", fw_info->fw_version.major);
+	printk(KERN_DEBUG "SST DBG:max pcm = %d\n", fw_info->max_pcm_streams_supported);
+	printk(KERN_DEBUG "SST DBG:max enc = %d\n", fw_info->max_enc_streams_supported);
+	printk(KERN_DEBUG "SST DBG:min input buf = %d\n", fw_info->min_input_buf);
+	printk(KERN_DEBUG "SST DBG:pop:src_min= %d\n", fw_info->pop_info.src_min);
+	printk(KERN_DEBUG "SST DBG:pop:src_max= %d\n", fw_info->pop_info.src_max);
+	printk(KERN_DEBUG "SST DBG:pop:src= %d\n", fw_info->pop_info.src);
+	printk(KERN_DEBUG "SST DBG:pop:bass_boost= %d\n", fw_info->pop_info.bass_boost);
+	printk(KERN_DEBUG "SST DBG:pop:stereo_widening= %d\n", fw_info->pop_info.stereo_widening);
+	printk(KERN_DEBUG "SST DBG:pop:volume_control= %d\n", fw_info->pop_info.volume_control);
+	printk(KERN_DEBUG "SST DBG:pop:min_vol= %d\n", fw_info->pop_info.min_vol);
+	printk(KERN_DEBUG "SST DBG:pop:max_vol= %d\n", fw_info->pop_info.max_vol);
+	printk(KERN_DEBUG "SST DBG:prp:min_vol= %d\n", fw_info->prp_info.min_vol);
+	printk(KERN_DEBUG "SST DBG:prp:max_vol= %d\n", fw_info->prp_info.max_vol);
+	printk(KERN_DEBUG "SST DBG:prp:volume_control= %d\n", fw_info->prp_info.volume_control);
+	printk(KERN_DEBUG "SST DBG:mix:max streams = %d\n", fw_info->mix_info.max_streams);
+	printk(KERN_DEBUG "SST DBG:port0:port_type = %d\n", fw_info->port_info[0].port_type);
+	printk(KERN_DEBUG "SST DBG:port1:port_type = %d\n", fw_info->port_info[1].port_type);
+	return;
+}
+
+/*
+ * sst_get_stream_allocated - this function gets a stream allocated with
+ * the given params
+ */
+static int sst_get_stream_allocated(struct snd_sst_params *str_param,
+			u32 block, u32 pvt_id)
+{
+	int retval;
+	retval = sst_alloc_stream((char *) &str_param->sparams, str_param->ops,
+				str_param->codec, pvt_id);
+	if (retval) {
+		printk(KERN_ERR
+			"SST ERR: sst_alloc_stream failed %d \n", retval);
+		return retval;
+	}
+	/* Block the call for reply */
+	retval = sst_wait_timeout(sst_drv_ctx,
+				&sst_drv_ctx->alloc_block[block]);
+
+	return retval;
+}
+
+/*
+ * set_port_params - this function sets the port parameters at Sound card end
+ */
+static void set_port_params(struct snd_sst_params *str_param,
+				enum snd_sst_stream_ops ops)
+{
+	/*int sfreq = str_param->sparams.uc.pcm_params.sfreq;
+	int word_size = str_param->sparams.uc.pcm_params.pcm_wd_sz;
+
+	printk(KERN_DEBUG "SST DBG:sampling frequency = %d wd_size = %d \n", sfreq, word_size);
+
+	if (ops == STREAM_OPS_PLAYBACK ||
+				ops == STREAM_OPS_PLAYBACK_DRM) {
+		printk(KERN_DEBUG "SST DBG:Setting playback path and port settings...\n");
+		sst_drv_ctx->scard_ops.set_pcm_audio_params(sfreq,
+								word_size);
+	} else if (ops == STREAM_OPS_CAPTURE) {
+		printk(KERN_DEBUG "SST DBG:Setting capture path...\n");
+		sst_drv_ctx->scard_ops->set_pcm_audio_params(sfreq, word_size);
+	}*/
+	return;
+}
+
+/*
+ * sst_get_sfreq - this function returns the frequency of the stream
+ */
+static int sst_get_sfreq(struct snd_sst_params *str_param)
+{
+	switch (str_param->codec) {
+	case SST_CODEC_TYPE_PCM:
+		return str_param->sparams.uc.pcm_params.sfreq;
+	case SST_CODEC_TYPE_MP3:
+		return str_param->sparams.uc.mp3_params.sfreq;
+	case SST_CODEC_TYPE_AAC:
+		return str_param->sparams.uc.aac_params.sfreq;;
+	case SST_CODEC_TYPE_WMA9:
+		return str_param->sparams.uc.wma_params.sfreq;;
+	default:
+		return 0;
+	}
+}
+
+/*
+ * sst_stalled - this function checks if the lpe is in stalled state
+ */
+int sst_stalled(void)
+{
+	int retry = 1000;
+	int retval = -1;
+
+	while(retry) {
+		if ( !sst_drv_ctx->lpe_stalled )
+			return 0;
+		//wait for time and re-check
+		mdelay(1);
+
+		retry--;
+	}
+
+	printk(KERN_DEBUG "SST DBG:LPE is in Stalled State\n");
+	return retval;
+}
+/*
+ * sst_get_stream - this function prepares for stream allocation
+ */
+static int sst_get_stream(struct snd_sst_params *str_param, u32 pvt_id)
+{
+	int i, retval;
+	struct stream_info *str_info;
+
+	/* stream is not allocated, we are allocating */
+	i = sst_get_block_stream(sst_drv_ctx);
+	printk(KERN_DEBUG "SST DBG:alloc block allocated = %d\n", i);
+	if (i < 0)
+		return -ENOMEM;
+	sst_drv_ctx->alloc_block[i].sst_id = pvt_id;
+
+	retval = sst_get_stream_allocated(str_param, i, pvt_id);
+	if (retval == -(SST_LIB_ERR_LIB_DNLD_REQUIRED)) {
+		/* codec download is required */
+		struct snd_sst_alloc_response *response =
+				sst_drv_ctx->alloc_block[i].ops_block.data;
+		printk(KERN_DEBUG "SST DBG:Codec is required.... trying that\n");
+		retval = sst_load_library(&response->lib_dnld,
+				str_param->ops, pvt_id);
+		kfree(response);
+
+		if (!retval) {
+			printk(KERN_DEBUG "SST DBG:codec was downloaded sucesfully \n");
+			printk(KERN_DEBUG "SST DBG:try alloac again\n");
+			sst_drv_ctx->alloc_block[i].ops_block.condition = false;
+
+			retval = sst_get_stream_allocated(str_param, i, pvt_id);
+
+			if (retval <= 0)
+				goto err;
+			set_port_params(str_param, str_param->ops);
+
+			printk(KERN_DEBUG "SST DBG:Allocation done stream id %d \n", retval);
+		} else {
+			printk(KERN_DEBUG "SST DBG:codec download failed \n");
+			retval = -EIO;
+			goto err;
+		}
+	} else if  (retval <= 0)
+		goto err;
+	else
+		set_port_params(str_param, str_param->ops);
+
+	/* store sampling freq */
+	str_info = &sst_drv_ctx->streams[retval];
+	str_info->sfreq = sst_get_sfreq(str_param);
+
+	/* power on the analog, if reqd */
+	if (str_param->ops == STREAM_OPS_PLAYBACK ||
+			str_param->ops == STREAM_OPS_PLAYBACK_DRM) {
+
+		sst_drv_ctx->scard_ops->power_up_pmic_pb(
+					sst_drv_ctx->pmic_port_instance);
+		/*Only if the playback is MP3 - Send a message*/
+#ifdef CONFIG_MSTWN_POWER_MGMT
+		if(str_info->codec == SST_CODEC_TYPE_MP3) {
+			sst_ospm_send_event(OSPM_EVENT_LPAUDIO_START);
+			sst_drv_ctx->lpaudio_start++;
+			printk(KERN_DEBUG "SST DBG:lpaudio_start:%d", sst_drv_ctx->lpaudio_start);
+			printk(KERN_DEBUG "SST DBG:Sending OSPM_EVENT_LPAUDIO_START...\n");
+		}else {/*Only if the playback is non - MP3- Send a messageif not sent already*/
+			if(sst_drv_ctx->audio_start == 0) {
+				sst_ospm_send_event(OSPM_EVENT_SUBSYS_START_PLAY);
+				sst_drv_ctx->audio_start++;
+				printk(KERN_DEBUG "SST DBG:audio_start:%d", sst_drv_ctx->audio_start);
+				printk(KERN_DEBUG "SST DBG:Sending OSPM_EVENT_SUBSYS_START_PLAY...\n");
+
+			}
+			else {
+				sst_drv_ctx->audio_start++;
+			}
+		}
+#endif
+		sst_drv_ctx->pb_streams++;
+	} else if (str_param->ops == STREAM_OPS_CAPTURE) {
+
+		sst_drv_ctx->scard_ops->power_up_pmic_cp(
+				sst_drv_ctx->pmic_port_instance);
+		/*Send a messageif not sent already*/
+#ifdef CONFIG_MSTWN_POWER_MGMT
+		if(sst_drv_ctx->audio_start == 0) {
+			sst_ospm_send_event(OSPM_EVENT_SUBSYS_START_PLAY);
+			printk(KERN_DEBUG "SST DBG:audio_start:%d", sst_drv_ctx->audio_start);
+			printk(KERN_DEBUG "SST DBG:Sending OSPM_EVENT_SUBSYS_START_PLAY...\n");
+			sst_drv_ctx->audio_start++;
+		}else {
+			sst_drv_ctx->audio_start++;
+		}
+#endif
+		sst_drv_ctx->cp_streams++;
+	}
+
+err:
+	sst_drv_ctx->alloc_block[i].sst_id = BLOCK_UNINIT;
+	return retval;
+}
+
+/**
+* intel_sst_ioctl - recieves the device ioctl's
+* @i_node:	inode structure
+* @file_ptr:	pointer to file
+* @cmd: 	Ioctl cmd
+* @arg:		data
+*
+* This function is called by OS when a user space component
+* sends an Ioctl to SST driver
+*/
+int intel_sst_ioctl(struct inode *i_node, struct file *file_ptr,
+				unsigned int cmd, unsigned long arg)
+{
+	int retval = 0;
+	struct ioctl_pvt_data *data = NULL;
+	int str_id = 0, minor = 0;
+	dev_t device = i_node->i_rdev;
+
+	if (device == MKDEV(INTEL_SST_MAJOR, 0)) {
+		minor = 0;
+		data = (struct ioctl_pvt_data *)
+			file_ptr->private_data;
+		str_id = data->str_id;
+	} else if (device == MKDEV(INTEL_SST_MAJOR, 1))
+		minor = 1;
+	else
+		return -EINVAL;
+
+	if (sst_drv_ctx->sst_state != SST_FW_RUNNING) {
+		printk(KERN_ERR
+			"SST ERR: SST Not runng %d\n " , sst_drv_ctx->sst_state);
+		return -EBUSY;
+	}
+
+	switch (_IOC_NR(cmd)) {
+	case _IOC_NR(SNDRV_SST_STREAM_PAUSE):
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_IOCTL_PAUSE recieved for %d!\n", str_id);
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: called for AM handle minor%d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		retval = sst_pause_stream(str_id);
+		break;
+
+	case _IOC_NR(SNDRV_SST_STREAM_RESUME):
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_IOCTL_RESUME recieved!\n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: caled for AM handle minor %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		retval = sst_resume_stream(str_id);
+		break;
+
+	case _IOC_NR(SNDRV_SST_STREAM_SET_PARAMS): {
+		struct snd_sst_params *str_param = (struct snd_sst_params *)arg;
+
+		printk(KERN_DEBUG "SST DBG:IOCTL_SET_PARAMS recieved!\n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: caled for AM handle minor %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		sst_print_params(str_param);
+
+		if (!str_id) {
+			retval = sst_get_stream(str_param, data->pvt_id);
+			if (retval > 0) {
+				struct stream_info *str_info;
+				sst_drv_ctx->stream_cnt++;
+				data->str_id = retval;
+				str_info = &sst_drv_ctx->streams[retval];
+				str_info->src = SST_DRV;
+				retval = copy_to_user(&str_param->stream_id,
+						&retval, sizeof(__u32));
+			} else {
+				if (retval == -SST_ERR_INVALID_PARAMS)
+					retval = -EINVAL;
+			}
+		} else {
+			printk(KERN_DEBUG "SST DBG:SET_STREAM_PARAMS recieved!\n");
+			/* allocated set params only */
+			retval = sst_set_stream_param(str_id, str_param);
+			/* Block the call for reply */
+			if (!retval) {
+				int sfreq = 0, word_size = 0, num_channel = 0;
+				sfreq =	str_param->sparams.uc.pcm_params.sfreq;
+				word_size = str_param->sparams.
+						uc.pcm_params.pcm_wd_sz;
+				num_channel = str_param->sparams.uc.pcm_params.num_chan;
+				if (str_param->ops == STREAM_OPS_CAPTURE) {
+					printk(KERN_DEBUG "SST DBG:SST sampling frequency= %d\n",
+							sfreq);
+					sst_drv_ctx->scard_ops->\
+					set_pcm_audio_params(sfreq, word_size, num_channel);
+				}
+			}
+		}
+		break;
+	}
+	case _IOC_NR(SNDRV_SST_SET_VOL): {
+		struct snd_sst_vol *set_vol;
+		struct snd_sst_vol *rec_vol = (struct snd_sst_vol *)arg;
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_SET_VOLUME recieved for %d!\n",
+				rec_vol->stream_id);
+		if (minor == STREAM_MODULE && rec_vol->stream_id == 0) {
+			printk(KERN_DEBUG "SST DBG:invalid operation!\n");
+			retval = -EPERM;
+			break;
+		}
+		set_vol = kzalloc(sizeof(*set_vol), GFP_ATOMIC);
+		if (!set_vol) {
+			printk(KERN_DEBUG "SST DBG:mem allocation failed\n");
+			retval = -ENOMEM;
+			break;
+		}
+		retval = copy_from_user(set_vol, rec_vol, sizeof(*set_vol));
+		if (retval) {
+			printk(KERN_DEBUG "SST DBG:copy failed\n");
+			retval = -EAGAIN;
+			break;
+		}
+		retval = sst_set_vol(set_vol);
+		kfree(set_vol);
+		break;
+	}
+	case _IOC_NR(SNDRV_SST_GET_VOL): {
+		struct snd_sst_vol *rec_vol = (struct snd_sst_vol *)arg;
+		struct snd_sst_vol get_vol;
+		printk(KERN_DEBUG "SST DBG:IOCTL_GET_VOLUME recieved for stream = %d!\n",
+				rec_vol->stream_id);
+		if (minor == STREAM_MODULE && rec_vol->stream_id == 0) {
+			printk(KERN_DEBUG "SST DBG:invalid operation!\n");
+			retval = -EPERM;
+			break;
+		}
+		get_vol.stream_id = rec_vol->stream_id;
+		retval = sst_get_vol(&get_vol);
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: Get volume failed = %d\n", retval);
+			retval = -EIO;
+			break;
+		}
+		printk(KERN_DEBUG "SST DBG:id = %d\n, vol = %d, ramp_dur = %d, ramp_type=%d\n",
+				get_vol.stream_id, get_vol.volume,
+				get_vol.ramp_duration, get_vol.ramp_type);
+		retval = copy_to_user((struct snd_sst_vol *)arg,
+						&get_vol, sizeof(get_vol));
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: copy to user failed %d\n", retval);
+			retval = -EIO;
+			break;
+		}
+		/*sst_print_get_vol_info(str_id, &get_vol);*/
+		break;
+	}
+
+	case _IOC_NR(SNDRV_SST_MUTE): {
+		struct snd_sst_mute *set_mute;
+		struct snd_sst_vol *rec_mute = (struct snd_sst_vol *)arg;
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_SET_VOLUME recieved for %d!\n",
+			rec_mute->stream_id);
+		if (minor == STREAM_MODULE && rec_mute->stream_id == 0) {
+			printk(KERN_DEBUG "SST DBG:invalid operation!\n");
+			retval = -EPERM;
+			break;
+		}
+		set_mute = kzalloc(sizeof(*set_mute), GFP_ATOMIC);
+		if (!set_mute) {
+			printk(KERN_DEBUG "SST DBG:mem allocation failed\n");
+			retval = -ENOMEM;
+			break;
+		}
+		retval = copy_from_user(set_mute, rec_mute, sizeof(*set_mute));
+		if (retval) {
+			printk(KERN_DEBUG "SST DBG:copy failed\n");
+			retval = -EAGAIN;
+			break;
+		}
+		retval = sst_set_mute(set_mute);
+		kfree(set_mute);
+		break;
+	}
+	case _IOC_NR(SNDRV_SST_STREAM_GET_PARAMS): {
+		struct snd_sst_get_stream_params get_params;
+
+		printk(KERN_DEBUG "SST DBG:IOCTL_GET_PARAMS recieved!\n");
+		if (minor != 0) {
+				printk(KERN_ERR
+			"SST ERR: called for AM handle minor %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+
+		retval = sst_get_stream_params(str_id, &get_params);
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: Get params failed = %d\n", retval);
+			retval = -EIO;
+			break;
+		}
+		retval = copy_to_user((struct snd_sst_get_stream_params *)arg,
+					&get_params, sizeof(get_params));
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: copy to user failed %d\n" , retval);
+			retval = -EIO;
+			break;
+		}
+		sst_print_stream_params(&get_params);
+		break;
+	}
+
+	case _IOC_NR(SNDRV_SST_MMAP_PLAY):
+	case _IOC_NR(SNDRV_SST_MMAP_CAPTURE):
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_MMAP_PLAY/CAPTURE recieved!\n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+			"SST ERR: called for AM handle minor %d\n" , minor);
+			retval = -EINVAL;
+			break;
+		}
+		retval = intel_sst_mmap_play_capture(str_id,
+				(struct snd_sst_mmap_buffs *)arg);
+		break;
+
+	case _IOC_NR(SNDRV_SST_STREAM_DROP):
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_IOCTL_DROP recieved!\n");
+		if (minor != STREAM_MODULE) {
+			retval = -EINVAL;
+			break;
+		}
+		retval = sst_drop_stream(str_id);
+		break;
+
+	case _IOC_NR(SNDRV_SST_STREAM_GET_TSTAMP): {
+		unsigned long long *ms = (unsigned long long *)arg;
+		struct snd_sst_tstamp tstamp = {0};
+		unsigned long long time, freq, mod;
+
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_STREAM_GET_TSTAMP recieved!\n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: called for AM handle minor %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		memcpy_fromio(&tstamp,
+			((void *)(sst_drv_ctx->mailbox + SST_TIME_STAMP)
+			+(str_id * sizeof(tstamp))),
+			sizeof(tstamp));
+		time = tstamp.samples_rendered;
+		printk(KERN_DEBUG "SST DBG:samples rendered! = 0x%llx\n", time);
+		freq = (unsigned long long) tstamp.sampling_frequency;
+		printk(KERN_DEBUG "SST DBG:freq = %llx\n", freq);
+		time = time * 1000; /* converting it to ms */
+		mod = do_div(time, freq);
+		printk(KERN_DEBUG "SST DBG:mod = 0x%llx\n", mod);
+		printk(KERN_DEBUG "SST DBG:msec = 0x%llx\n", time);
+		retval = copy_to_user(ms, &time, sizeof(*ms));
+		if (retval)
+			printk(KERN_ERR
+				"SST ERR: copy failed = %d\n", retval);
+		break;
+	}
+
+	case _IOC_NR(SNDRV_SST_STREAM_START):{
+		struct stream_info *stream;
+
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_STREAM_START recieved!\n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: called for AM handle minor %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		retval = sst_validate_strid(str_id);
+		if (retval)
+			break;
+		stream = &sst_drv_ctx->streams[str_id];
+		mutex_lock(&stream->lock);
+		if (stream->status == STREAM_INIT &&
+			stream->need_draining != true) {
+			printk(KERN_DEBUG "SST DBG:calling play frames...\n");
+			stream->prev = stream->status;
+			stream->status = STREAM_RUNNING;
+			if (stream->ops == STREAM_OPS_PLAYBACK ||
+				stream->ops == STREAM_OPS_PLAYBACK_DRM) {
+				retval = sst_play_frame(str_id);
+				/*sst_ospm_send_event(
+					OSPM_EVENT_SUBSYS_START_PLAY);*/
+			} else if (stream->ops == STREAM_OPS_CAPTURE)
+				retval = sst_capture_frame(str_id);
+			else {
+				printk(KERN_ERR
+					"SST ERR: Invalid ops 0x%x\n" ,	stream->ops);
+				retval = -EINVAL;
+				mutex_unlock(
+					&sst_drv_ctx->streams[str_id].lock);
+				break;
+			}
+			if (retval < 0) {
+				printk(KERN_ERR
+					"SST ERR: play/cptur frame fail \n");
+				stream->status = STREAM_INIT;
+				mutex_unlock(
+					&sst_drv_ctx->streams[str_id].lock);
+				break;
+			}
+		} else {
+			printk(KERN_ERR
+				"SST ERR: Inv strt for stream%d state0x%x\n", \
+				str_id, stream->status);
+			retval = -EINVAL;
+		}
+		mutex_unlock(&sst_drv_ctx->streams[str_id].lock);
+		break;
+	}
+
+	case _IOC_NR(SNDRV_SST_SET_TARGET_DEVICE): {
+		struct snd_sst_target_device *target_device;
+
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_SET_TARGET_PLAYBACK DEVICE recieved!\n");
+		target_device =	(struct snd_sst_target_device *)arg;
+		BUG_ON(!target_device);
+		if (minor != AM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: called for non AM handle minor %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		retval = sst_target_device_select(target_device);
+		break;
+	}
+
+	case _IOC_NR(SNDRV_SST_DRIVER_INFO): {
+		struct snd_sst_driver_info *info =
+			(struct snd_sst_driver_info *)arg;
+
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_DRIVER_INFO recived \n");
+		info->version = SST_VERSION_NUM;
+		/* hard coding, shud get sumhow later */
+		info->active_pcm_streams = sst_drv_ctx->stream_cnt -
+						sst_drv_ctx->encoded_cnt;
+		info->active_enc_streams = sst_drv_ctx->encoded_cnt;
+		info->max_pcm_streams = MAX_ACTIVE_STREAM - MAX_ENC_STREAM;
+		info->max_enc_streams = MAX_ENC_STREAM;
+		info->buf_per_stream = sst_drv_ctx->mmap_len;
+		break;
+	}
+
+	case _IOC_NR(SNDRV_SST_STREAM_DECODE): {
+		struct snd_sst_dbufs *param =
+				(struct snd_sst_dbufs *)arg, dbufs_local;
+		int i;
+		struct snd_sst_buffs ibufs, obufs;
+		struct snd_sst_buff_entry ibuf_temp[param->ibufs->entries],
+				obuf_temp[param->obufs->entries];
+
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_STREAM_DECODE recived \n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: called for AM handle minor %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		if (!param) {
+			printk(KERN_ERR "SST ERR: null param passed\n");
+			retval = -EINVAL;
+			break;
+		}
+
+		dbufs_local.input_bytes_consumed = param->input_bytes_consumed;
+		dbufs_local.output_bytes_produced =
+					param->output_bytes_produced;
+		dbufs_local.ibufs = &ibufs;
+		dbufs_local.obufs = &obufs;
+		dbufs_local.ibufs->entries = param->ibufs->entries;
+		dbufs_local.ibufs->type = param->ibufs->type;
+		dbufs_local.obufs->entries = param->obufs->entries;
+		dbufs_local.obufs->type = param->obufs->type;
+
+		dbufs_local.ibufs->buff_entry = ibuf_temp;
+		for (i = 0; i < dbufs_local.ibufs->entries; i++) {
+			ibuf_temp[i].buffer =
+				param->ibufs->buff_entry[i].buffer;
+			ibuf_temp[i].size =
+				param->ibufs->buff_entry[i].size;
+		}
+		dbufs_local.obufs->buff_entry = obuf_temp;
+		for (i = 0; i < dbufs_local.obufs->entries; i++) {
+			obuf_temp[i].buffer =
+				param->obufs->buff_entry[i].buffer;
+			obuf_temp[i].size =
+				param->obufs->buff_entry[i].size;
+		}
+		retval = sst_decode(str_id, &dbufs_local);
+		if (retval) {
+			printk(KERN_ERR"SST ERR: decoding failed \n");
+			retval =  -EAGAIN;
+		}
+		retval = copy_to_user(&param->input_bytes_consumed,
+			&dbufs_local.input_bytes_consumed,
+			sizeof(unsigned long long));
+		if (retval) {
+			printk(KERN_ERR"SST ERR: copy to user failed \n");
+			retval =  -EAGAIN;
+			break;
+		}
+		retval = copy_to_user(&param->output_bytes_produced,
+				&dbufs_local.output_bytes_produced,
+				sizeof(unsigned long long));
+		if (retval) {
+			printk(KERN_ERR"SST ERR: copy to user failed \n");
+			retval =  -EAGAIN;
+			break;
+		}
+		printk(KERN_DEBUG "SST DBG:input_bytes_consumed=%lld\n",
+				param->input_bytes_consumed);
+		printk(KERN_DEBUG "SST DBG:output_bytes_produced=%lld\n",
+				param->output_bytes_produced);
+		printk(KERN_DEBUG "SST DBG:ibufs->entries=%d\n", param->ibufs->entries);
+		printk(KERN_DEBUG "SST DBG:input_consumed = %lld, output_produced = %lld \n",
+				param->input_bytes_consumed,
+				param->output_bytes_produced);
+		printk(KERN_DEBUG "SST DBG:first ibufs size=%d\n",
+				param->ibufs->buff_entry[0].size);
+		printk(KERN_DEBUG "SST DBG:first ibufs addr=%p\n",
+				param->ibufs->buff_entry[0].buffer);
+		printk(KERN_DEBUG "SST DBG:obufs->entries=%d\n", param->obufs->entries);
+		printk(KERN_DEBUG "SST DBG:first obufs size=%d\n",
+				param->obufs->buff_entry[0].size);
+		printk(KERN_DEBUG "SST DBG:first obufs addr=%p\n",
+				param->obufs->buff_entry[0].buffer);
+		break;
+	}
+
+	case _IOC_NR(SNDRV_SST_STREAM_DRAIN):
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_STREAM_DRAIN recived \n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: caled for AM handle minr %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		retval = sst_drain_stream(str_id);
+		break;
+
+	case _IOC_NR(SNDRV_SST_STREAM_BYTES_DECODED): {
+		unsigned long long *bytes = (unsigned long long *)arg;
+		struct snd_sst_tstamp tstamp = {0};
+
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_STREAM_BYTES_DECODED recieved!\n");
+		if (minor != STREAM_MODULE) {
+			printk(KERN_ERR
+				"SST ERR: caled for AM hndle minr %d\n", minor);
+			retval = -EINVAL;
+			break;
+		}
+		memcpy_fromio(&tstamp,
+			((void *)(sst_drv_ctx->mailbox + SST_TIME_STAMP)
+			+(str_id * sizeof(tstamp))),
+			sizeof(tstamp));
+		retval = copy_to_user(bytes, &tstamp.bytes_processed,
+					sizeof(*bytes));
+		printk(KERN_DEBUG "SST DBG:bytes processed =%lld\n", tstamp.bytes_processed);
+		if (retval)
+			printk(KERN_ERR
+				"SST ERR: copy failed = %d\n", retval);
+		break;
+	}
+	case _IOC_NR(SNDRV_SST_FW_INFO): {
+		struct snd_sst_fw_info *fw_info;
+
+		printk(KERN_DEBUG "SST DBG:SNDRV_SST_FW_INFO recived \n");
+
+		fw_info = kzalloc(sizeof(*fw_info), GFP_ATOMIC);
+		if (!fw_info) {
+			printk(KERN_ERR	"SST ERR: mem alocation fail\n");
+			retval = -ENOMEM;
+			break;
+		}
+		retval = sst_get_fw_info(fw_info);
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: sst_get_fw_info fail = %d\n", retval);
+			kfree(fw_info);
+			break;
+		}
+		retval = copy_to_user((struct snd_sst_dbufs *)arg,
+					fw_info, sizeof(*fw_info));
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: copy to user failed %d\n", retval);
+			kfree(fw_info);
+			retval = -EIO;
+			break;
+		}
+		sst_print_fw_info(fw_info);
+		kfree(fw_info);
+		break;
+	}
+	default:
+		printk(KERN_DEBUG "SST DBG:IOCTL not supported yet !\n");
+		retval = -ENOTTY;
+	}
+	printk(KERN_DEBUG "SST DBG:...complete ret code = %d\n", retval);
+
+	return retval;
+}
+
+/*
+	Intelmid driver interface Routines
+*/
+
+void sst_process_mad_ops(struct work_struct *work)
+{
+	struct mad_ops_wq *mad_ops =
+			container_of(work, struct mad_ops_wq, wq);
+	int retval = 0;
+	struct stream_info *stream;
+
+	switch (mad_ops->control_op) {
+	case SST_SND_PAUSE:
+		retval = sst_pause_stream(mad_ops->stream_id);
+		break;
+	case SST_SND_RESUME:
+		retval = sst_resume_stream(mad_ops->stream_id);
+		break;
+	case SST_SND_DROP:
+		retval = sst_drop_stream(mad_ops->stream_id);
+		break;
+	case SST_SND_STREAM_PROCESS:
+		printk(KERN_DEBUG "SST DBG:play/capt frames...\n");
+		stream = &sst_drv_ctx->streams[mad_ops->stream_id];
+		if (stream->status == STREAM_UN_INIT)
+			return;
+		stream->prev = stream->status;
+		stream->status = STREAM_RUNNING;
+		stream->data_blk.on = false;
+		if (stream->ops == STREAM_OPS_PLAYBACK)
+			retval = sst_play_frame(mad_ops->stream_id);
+		else if (stream->ops == STREAM_OPS_CAPTURE)
+			retval = sst_capture_frame(mad_ops->stream_id);
+		else
+			printk(KERN_ERR
+				"SST ERR: invalid stream ops invoked \n");
+		if (retval < 0)
+			printk(KERN_ERR
+				"SST ERR: play/captur frames failed \n");
+		break;
+	default:
+		printk(KERN_ERR
+			"SST ERR: wrong control_ops reported\n");
+	}
+	return;
+}
+/**
+* sst_control_set - Set Control params
+* @control_list:	list of controls to be set
+*
+* This function is called by MID sound card driver to set
+* SST/Sound card controls. This is registered with MID driver
+*/
+int sst_control_set(int control_element, void *value)
+{
+	int retval = 0, str_id = 0, status;
+	struct stream_info *stream;
+
+	if (sst_drv_ctx->sst_state == SST_UN_INIT) {
+		/* FW is not downloaded */
+		printk(KERN_DEBUG "SST DBG:DSP Downloading FW now...\n");
+		retval = sst_download_fw();
+		if (retval) {
+			printk(KERN_ERR
+				"SST ERR: FW download failed = 0x%x, abort\n", retval);
+			return retval;
+		}
+	}
+
+	switch (control_element) {
+	case SST_SND_ALLOC: {
+		struct snd_sst_params *str_param;
+		int pcm_id = sst_assign_pvt_id(sst_drv_ctx);
+		struct stream_info *str_info;
+
+		str_param = (struct snd_sst_params *)value;
+		BUG_ON(!str_param);
+		sst_print_params(str_param);
+		retval = sst_get_stream(str_param, pcm_id);
+		if (retval >= 0)
+			sst_drv_ctx->stream_cnt++;
+		/*if (str_param->ops == STREAM_OPS_PLAYBACK ||
+				str_param->ops == STREAM_OPS_PLAYBACK_DRM)
+			sst_ospm_send_event(OSPM_EVENT_SUBSYS_START_PLAY);*/
+		str_info = &sst_drv_ctx->streams[retval];
+		str_info->src = MAD_DRV;
+		break;
+	}
+
+	case SST_SND_PAUSE:
+	case SST_SND_RESUME:
+	case SST_SND_DROP:
+		sst_drv_ctx->mad_ops.control_op = control_element;
+		sst_drv_ctx->mad_ops.stream_id = *(int *)value;
+		queue_work(sst_drv_ctx->mad_wq, &sst_drv_ctx->mad_ops.wq);
+		break;
+
+	case SST_SND_FREE:
+		str_id = *(int *)value;
+		stream = &sst_drv_ctx->streams[str_id];
+		free_stream_context(str_id);
+		stream->pcm_substream = NULL;
+		stream->period_elapsed = NULL;
+		sst_drv_ctx->stream_cnt--;
+		break;
+
+	case SST_SND_STREAM_INIT: {
+		struct pcm_stream_info *str_info;
+		struct stream_info *stream;
+
+		printk(KERN_DEBUG "SST DBG:stream init called\n");
+		str_info = (struct pcm_stream_info *)value;
+		str_id = str_info->str_id;
+		retval = sst_validate_strid(str_id);
+		if (retval)
+			break;
+
+		stream = &sst_drv_ctx->streams[str_id];
+		printk(KERN_DEBUG "SST DBG:setting the period ptrs\n");
+		stream->pcm_substream = str_info->mad_substream;
+		stream->period_elapsed = str_info->period_elapsed;
+		stream->sfreq = str_info->sfreq;
+		stream->prev = stream->status;
+		stream->status = STREAM_INIT;
+		break;
+	}
+
+	case SST_SND_BUFFER_POINTER: {
+		struct pcm_stream_info *stream_info;
+		struct snd_sst_tstamp fw_tstamp = {0,};
+		struct stream_info *stream;
+
+	//	printk(KERN_DEBUG "SST DBG:buffer pointer query\n");
+
+		stream_info = (struct pcm_stream_info *)value;
+		str_id = stream_info->str_id;
+		retval = sst_validate_strid(str_id);
+		if (retval)
+			break;
+		stream = &sst_drv_ctx->streams[str_id];
+
+		if (!stream->pcm_substream)
+			break;
+		memcpy_fromio(&fw_tstamp,
+			((void *)(sst_drv_ctx->mailbox + SST_TIME_STAMP)
+			+(str_id * sizeof(fw_tstamp))),
+			sizeof(fw_tstamp));
+
+	//	printk(KERN_DEBUG "SST DBG:strid = %d\n", str_id);
+
+		if (stream->ops == STREAM_OPS_PLAYBACK)
+			stream_info->buffer_ptr = fw_tstamp.samples_rendered;
+		else
+			stream_info->buffer_ptr = fw_tstamp.samples_processed;
+	/*	printk(KERN_DEBUG "SST DBG:samples played = %lld\n",
+				stream_info->buffer_ptr);
+	*/
+		break;
+	}
+	case SST_ENABLE_RX_TIME_SLOT: {
+		status = *(int *)value;
+		sst_drv_ctx->rx_time_slot_status = status ;
+		printk(KERN_DEBUG "SST DBG:in case:: **********SST_ENABLE_RX_TIME_SLOT*********** \n");
+		sst_enable_rx_timeslot(status);
+		break;
+	}
+	default:
+		/* Illegal case */
+		printk(KERN_ERR"SST ERR: illegal req\n");
+		return -EINVAL;
+	}
+//	printk(KERN_DEBUG "SST DBG:...complete ret code = %d\n", retval);
+
+	return retval;
+}
+
+
+/**
+* sst_send_data_to_HW - send data buffers
+* @buffer_data:		user buffer
+*
+* This function is called by MID sound card driver to send buffer
+* to HW. This is registered with MID driver
+*/
+int sst_send_buffer_to_HW(int str_id, struct stream_buffer *mad_buf)
+{
+	/* recvd a buffer map it to stream */
+	/* this is a PCM stream and playback */
+	int retval = 0;
+	bool flag_add = false;
+	struct sst_stream_bufs *sst_buf = NULL, *_sst_buf;
+	struct stream_info *stream;
+
+	if (!mad_buf || !mad_buf->addr || !mad_buf->length) {
+		printk(KERN_ERR
+			"SST ERR: Null Ptr or buf size = 0\n");
+		return -EINVAL;
+	}
+
+	if (sst_drv_ctx->sst_state != SST_FW_RUNNING) {
+		printk(KERN_ERR
+			"SST ERR: SST Not runng: %d\n", sst_drv_ctx->sst_state);
+		return -EBUSY;
+	}
+
+	retval = sst_validate_strid(str_id);
+	if (retval < 0)
+		return -EINVAL;
+
+	stream = &sst_drv_ctx->streams[str_id];
+	printk(KERN_DEBUG "SST DBG:stream status = %d strid=%d\n", stream->status, str_id);
+	printk(KERN_DEBUG "SST DBG:stream codec = %d, prevstate=%d\n",
+			stream->codec, stream->prev);
+	if (stream->status == STREAM_UN_INIT) {
+		printk(KERN_ERR"SST ERR: BAD REQUEST!\n");
+		return -EBADRQC;
+	}
+	printk(KERN_DEBUG "SST DBG:received addr=0x%x size = 0x%x\n",
+			(unsigned int)mad_buf->addr, mad_buf->length);
+	/* list is not empty */
+	list_for_each_entry_safe(sst_buf, _sst_buf, &stream->bufs, node) {
+		if (sst_buf->in_use == true)
+			continue;
+		else if ((int) mad_buf->addr !=
+				(int)sst_buf->addr + sst_buf->size)
+			continue;
+		else {
+			sst_buf->size += mad_buf->length;
+			flag_add = true;
+			printk(KERN_DEBUG "SST DBG:inc addr = 0x%p, base = 0x%x inc_val = 0x%x\n",
+				sst_buf->addr, sst_buf->size, mad_buf->length);
+			break;
+		}
+	}
+
+	if (flag_add == false) {
+		sst_buf = kzalloc(sizeof(*sst_buf), GFP_ATOMIC);
+		if (!sst_buf)
+			return -ENOMEM;
+		sst_buf->size = mad_buf->length;
+		sst_buf->addr = (void *)mad_buf->addr;
+		sst_buf->offset = 0;
+		sst_buf->in_use = false;
+		/*adding without locking FIXME*/
+		if( in_interrupt()) {
+			list_add_tail(&sst_buf->node, &stream->bufs);
+		} else {
+			spin_lock(&stream->pcm_lock);
+			list_add_tail(&sst_buf->node, &stream->bufs);
+			spin_unlock(&stream->pcm_lock);
+		}
+
+
+		flag_add = true;
+		printk(KERN_DEBUG "SST DBG:entry added addr = 0x%x size = 0x%x\n",
+				(unsigned int)mad_buf->addr, mad_buf->length);
+	}
+
+	if (stream->status == STREAM_INIT) {
+		sst_drv_ctx->mad_ops.control_op = SST_SND_STREAM_PROCESS;
+		sst_drv_ctx->mad_ops.stream_id = str_id;
+		queue_work(sst_drv_ctx->mad_wq, &sst_drv_ctx->mad_ops.wq);
+	}
+
+	return retval;
+}
+
+struct intel_sst_card_ops sst_pmic_ops = {
+	.control_set = sst_control_set,
+	.send_buffer = sst_send_buffer_to_HW,
+};
+
+/**
+* register_sst_card- function for sound card to register
+* @card:     pointer to structure of operations
+* This function is called card driver loads and is ready for registration
+*/
+int register_sst_card(struct intel_sst_card_ops *card)
+{
+
+	if (!card || !card->module_name) {
+		printk(KERN_ERR "SST ERR: Null Pointer Passed\n");
+		return -EINVAL;
+	}
+
+	if (sst_drv_ctx->pmic_state == SND_MAD_UN_INIT) {
+		/* register this driver */
+		if ((strncmp(SST_CARD_NAMES, card->module_name,
+				strlen(SST_CARD_NAMES))) == 0) {
+			sst_drv_ctx->pmic_vendor = card->vendor_id;
+			sst_drv_ctx->scard_ops =  card->scard_ops;
+			sst_pmic_ops.module_name = card->module_name;
+			sst_drv_ctx->pmic_state = SND_MAD_INIT_DONE;
+			sst_drv_ctx->rx_time_slot_status = RX_TIMESLOT_UNINIT;
+			card->control_set = sst_pmic_ops.control_set;
+			card->send_buffer = sst_pmic_ops.send_buffer;
+			sst_drv_ctx->scard_ops->card_status = SND_CARD_UN_INIT;
+			/* initialize card to know good state */
+			/*sst_drv_ctx->scard_ops->init_card();*/
+			return 0;
+		} else {
+			printk(KERN_ERR
+				"SST ERR: strcmp failed %s \n", card->module_name);
+			return -EINVAL;
+		}
+
+	} else {
+		/* already registered a driver */
+		printk(KERN_ERR
+			"SST ERR: Repeat for register..denied\n");
+		return -EBADRQC;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(register_sst_card);
+
+/**
+* unregister_sst_card- function for sound card to un-register
+* @card:     pointer to structure of operations
+* This function is called when card driver unloads
+*/
+void unregister_sst_card(struct intel_sst_card_ops *card)
+{
+	if (sst_pmic_ops.module_name == card->module_name) {
+		/* unreg */
+		sst_pmic_ops.module_name = "";
+		sst_drv_ctx->pmic_state = SND_MAD_UN_INIT;
+		printk(KERN_DEBUG "SST DBG:Unregistered %s\n", card->module_name);
+	}
+	return;
+}
+EXPORT_SYMBOL_GPL(unregister_sst_card);
+
+/**
+* lpe_mask_periphral_intr- function to mask SST DSP peripheral interrupt
+* @device:     device interrupt that needs masking
+*/
+int lpe_mask_periphral_intr(enum lpe_periphral device)
+{
+	union sst_pimr_reg pimr = {{0},};
+	if (!sst_drv_ctx)
+		return -EIO;
+
+	pimr.full = readl(sst_drv_ctx->shim + SST_PIMR);
+
+	switch (device) {
+	case LPE_DMA:
+		pimr.part.dmac_sc = 1;
+		/* dummy register for shim workaround */
+		writel(pimr.full, sst_drv_ctx->shim + SST_ISRD);
+		writel(pimr.full, sst_drv_ctx->shim + SST_PIMR);
+		break;
+
+	case LPE_SSP0:
+		break;
+
+	case LPE_SSP1:
+		break;
+
+	default:
+		break;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(lpe_mask_periphral_intr);
+
+/**
+* lpe_unmask_periphral_intr- function to unmask SST DSP peripheral interrupt
+* @device:     device interrupt that needs unmasking
+*/
+int lpe_unmask_periphral_intr(enum lpe_periphral device)
+{
+	union sst_pimr_reg pimr = {{0},};
+	if (!sst_drv_ctx)
+		return -EIO;
+
+	pimr.full = readl(sst_drv_ctx->shim + SST_PIMR);
+
+	switch (device) {
+	case LPE_DMA:
+		pimr.part.dmac_sc = 0;
+		/* dummy register for shim workaround */
+		writel(pimr.full, sst_drv_ctx->shim + SST_ISRD);
+		writel(pimr.full, sst_drv_ctx->shim + SST_PIMR);
+		break;
+
+	case LPE_SSP0:
+		break;
+
+	case LPE_SSP1:
+		break;
+
+	default:
+		break;
+	}
+	return 0;
+
+}
+EXPORT_SYMBOL_GPL(lpe_unmask_periphral_intr);
+
+/**
+* lpe_periphral_intr_status- function returns SST peripheral interrupt status
+* @device:      device for which the status is enquired
+* @status:	out parameters with the status of the peripheral device
+*/
+int lpe_periphral_intr_status(enum lpe_periphral device, int *status)
+{
+	union sst_pisr_reg pisr = {{0},};
+	if (!sst_drv_ctx)
+		return -EIO;
+
+	pisr.full = readl(sst_drv_ctx->shim + SST_PISR);
+
+	switch (device) {
+	case LPE_DMA:
+		*status = pisr.part.dmac;
+		break;
+
+	case LPE_SSP0:
+		break;
+
+	case LPE_SSP1:
+		break;
+
+	default:
+		break;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(lpe_periphral_intr_status);
-- 
1.6.2.2