sound/soc/intel/common/sst-dsp.c - kernel/quantenna - Git at Google

 /*
  * Intel Smart Sound Technology (SST) DSP Core Driver
  *
  * Copyright (C) 2013, Intel Corporation. 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 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.
  *
  */

 #include <linux/slab.h>
 #include <linux/export.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/io.h>
 #include <linux/delay.h>

 #include "sst-dsp.h"
 #include "sst-dsp-priv.h"

 #define CREATE_TRACE_POINTS
 #include <trace/events/intel-sst.h>

 /* Internal generic low-level SST IO functions - can be overidden */
 void sst_shim32_write(void __iomem *addr, u32 offset, u32 value)
 {
 	writel(value, addr + offset);
 }
 EXPORT_SYMBOL_GPL(sst_shim32_write);

 u32 sst_shim32_read(void __iomem *addr, u32 offset)
 {
 	return readl(addr + offset);
 }
 EXPORT_SYMBOL_GPL(sst_shim32_read);

 void sst_shim32_write64(void __iomem *addr, u32 offset, u64 value)
 {
 	memcpy_toio(addr + offset, &value, sizeof(value));
 }
 EXPORT_SYMBOL_GPL(sst_shim32_write64);

 u64 sst_shim32_read64(void __iomem *addr, u32 offset)
 {
 	u64 val;

 	memcpy_fromio(&val, addr + offset, sizeof(val));
 	return val;
 }
 EXPORT_SYMBOL_GPL(sst_shim32_read64);

 static inline void _sst_memcpy_toio_32(volatile u32 __iomem *dest,
 	u32 *src, size_t bytes)
 {
 	int i, words = bytes >> 2;

 	for (i = 0; i < words; i++)
 		writel(src[i], dest + i);
 }

 static inline void _sst_memcpy_fromio_32(u32 *dest,
 	const volatile __iomem u32 *src, size_t bytes)
 {
 	int i, words = bytes >> 2;

 	for (i = 0; i < words; i++)
 		dest[i] = readl(src + i);
 }

 void sst_memcpy_toio_32(struct sst_dsp *sst,
 	void __iomem *dest, void *src, size_t bytes)
 {
 	_sst_memcpy_toio_32(dest, src, bytes);
 }
 EXPORT_SYMBOL_GPL(sst_memcpy_toio_32);

 void sst_memcpy_fromio_32(struct sst_dsp *sst, void *dest,
 	void __iomem *src, size_t bytes)
 {
 	_sst_memcpy_fromio_32(dest, src, bytes);
 }
 EXPORT_SYMBOL_GPL(sst_memcpy_fromio_32);

 /* Public API */
 void sst_dsp_shim_write(struct sst_dsp *sst, u32 offset, u32 value)
 {
 	unsigned long flags;

 	spin_lock_irqsave(&sst->spinlock, flags);
 	sst->ops->write(sst->addr.shim, offset, value);
 	spin_unlock_irqrestore(&sst->spinlock, flags);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_write);

 u32 sst_dsp_shim_read(struct sst_dsp *sst, u32 offset)
 {
 	unsigned long flags;
 	u32 val;

 	spin_lock_irqsave(&sst->spinlock, flags);
 	val = sst->ops->read(sst->addr.shim, offset);
 	spin_unlock_irqrestore(&sst->spinlock, flags);

 	return val;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_read);

 void sst_dsp_shim_write64(struct sst_dsp *sst, u32 offset, u64 value)
 {
 	unsigned long flags;

 	spin_lock_irqsave(&sst->spinlock, flags);
 	sst->ops->write64(sst->addr.shim, offset, value);
 	spin_unlock_irqrestore(&sst->spinlock, flags);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64);

 u64 sst_dsp_shim_read64(struct sst_dsp *sst, u32 offset)
 {
 	unsigned long flags;
 	u64 val;

 	spin_lock_irqsave(&sst->spinlock, flags);
 	val = sst->ops->read64(sst->addr.shim, offset);
 	spin_unlock_irqrestore(&sst->spinlock, flags);

 	return val;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64);

 void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value)
 {
 	sst->ops->write(sst->addr.shim, offset, value);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_write_unlocked);

 u32 sst_dsp_shim_read_unlocked(struct sst_dsp *sst, u32 offset)
 {
 	return sst->ops->read(sst->addr.shim, offset);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_read_unlocked);

 void sst_dsp_shim_write64_unlocked(struct sst_dsp *sst, u32 offset, u64 value)
 {
 	sst->ops->write64(sst->addr.shim, offset, value);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_write64_unlocked);

 u64 sst_dsp_shim_read64_unlocked(struct sst_dsp *sst, u32 offset)
 {
 	return sst->ops->read64(sst->addr.shim, offset);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_read64_unlocked);

 int sst_dsp_shim_update_bits_unlocked(struct sst_dsp *sst, u32 offset,
 				u32 mask, u32 value)
 {
 	bool change;
 	unsigned int old, new;
 	u32 ret;

 	ret = sst_dsp_shim_read_unlocked(sst, offset);

 	old = ret;
 	new = (old & (~mask)) | (value & mask);

 	change = (old != new);
 	if (change)
 		sst_dsp_shim_write_unlocked(sst, offset, new);

 	return change;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_unlocked);

 int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
 				u64 mask, u64 value)
 {
 	bool change;
 	u64 old, new;

 	old = sst_dsp_shim_read64_unlocked(sst, offset);

 	new = (old & (~mask)) | (value & mask);

 	change = (old != new);
 	if (change)
 		sst_dsp_shim_write64_unlocked(sst, offset, new);

 	return change;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64_unlocked);

 /* This is for registers bits with attribute RWC */
 void sst_dsp_shim_update_bits_forced_unlocked(struct sst_dsp *sst, u32 offset,
 				u32 mask, u32 value)
 {
 	unsigned int old, new;
 	u32 ret;

 	ret = sst_dsp_shim_read_unlocked(sst, offset);

 	old = ret;
 	new = (old & (~mask)) | (value & mask);

 	sst_dsp_shim_write_unlocked(sst, offset, new);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced_unlocked);

 int sst_dsp_shim_update_bits(struct sst_dsp *sst, u32 offset,
 				u32 mask, u32 value)
 {
 	unsigned long flags;
 	bool change;

 	spin_lock_irqsave(&sst->spinlock, flags);
 	change = sst_dsp_shim_update_bits_unlocked(sst, offset, mask, value);
 	spin_unlock_irqrestore(&sst->spinlock, flags);
 	return change;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits);

 int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
 				u64 mask, u64 value)
 {
 	unsigned long flags;
 	bool change;

 	spin_lock_irqsave(&sst->spinlock, flags);
 	change = sst_dsp_shim_update_bits64_unlocked(sst, offset, mask, value);
 	spin_unlock_irqrestore(&sst->spinlock, flags);
 	return change;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);

 /* This is for registers bits with attribute RWC */
 void sst_dsp_shim_update_bits_forced(struct sst_dsp *sst, u32 offset,
 				u32 mask, u32 value)
 {
 	unsigned long flags;

 	spin_lock_irqsave(&sst->spinlock, flags);
 	sst_dsp_shim_update_bits_forced_unlocked(sst, offset, mask, value);
 	spin_unlock_irqrestore(&sst->spinlock, flags);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced);

 int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask,
 			 u32 target, u32 timeout, char *operation)
 {
 	int time, ret;
 	u32 reg;
 	bool done = false;

 	/*
 	 * we will poll for couple of ms using mdelay, if not successful
 	 * then go to longer sleep using usleep_range
 	 */

 	/* check if set state successful */
 	for (time = 0; time < 5; time++) {
 		if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target) {
 			done = true;
 			break;
 		}
 		mdelay(1);
 	}

 	if (done ==  false) {
 		/* sleeping in 10ms steps so adjust timeout value */
 		timeout /= 10;

 		for (time = 0; time < timeout; time++) {
 			if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target)
 				break;

 			usleep_range(5000, 10000);
 		}
 	}

 	reg = sst_dsp_shim_read_unlocked(ctx, offset);
 	dev_info(ctx->dev, "FW Poll Status: reg=%#x %s %s\n", reg, operation,
 			(time < timeout) ? "successful" : "timedout");
 	ret = time < timeout ? 0 : -ETIME;

 	return ret;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_register_poll);

 void sst_dsp_dump(struct sst_dsp *sst)
 {
 	if (sst->ops->dump)
 		sst->ops->dump(sst);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_dump);

 void sst_dsp_reset(struct sst_dsp *sst)
 {
 	if (sst->ops->reset)
 		sst->ops->reset(sst);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_reset);

 int sst_dsp_boot(struct sst_dsp *sst)
 {
 	if (sst->ops->boot)
 		sst->ops->boot(sst);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_boot);

 int sst_dsp_wake(struct sst_dsp *sst)
 {
 	if (sst->ops->wake)
 		return sst->ops->wake(sst);

 	return 0;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_wake);

 void sst_dsp_sleep(struct sst_dsp *sst)
 {
 	if (sst->ops->sleep)
 		sst->ops->sleep(sst);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_sleep);

 void sst_dsp_stall(struct sst_dsp *sst)
 {
 	if (sst->ops->stall)
 		sst->ops->stall(sst);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_stall);

 void sst_dsp_ipc_msg_tx(struct sst_dsp *dsp, u32 msg)
 {
 	sst_dsp_shim_write_unlocked(dsp, SST_IPCX, msg | SST_IPCX_BUSY);
 	trace_sst_ipc_msg_tx(msg);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_tx);

 u32 sst_dsp_ipc_msg_rx(struct sst_dsp *dsp)
 {
 	u32 msg;

 	msg = sst_dsp_shim_read_unlocked(dsp, SST_IPCX);
 	trace_sst_ipc_msg_rx(msg);

 	return msg;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_rx);

 int sst_dsp_mailbox_init(struct sst_dsp *sst, u32 inbox_offset, size_t inbox_size,
 	u32 outbox_offset, size_t outbox_size)
 {
 	sst->mailbox.in_base = sst->addr.lpe + inbox_offset;
 	sst->mailbox.out_base = sst->addr.lpe + outbox_offset;
 	sst->mailbox.in_size = inbox_size;
 	sst->mailbox.out_size = outbox_size;
 	return 0;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_mailbox_init);

 void sst_dsp_outbox_write(struct sst_dsp *sst, void *message, size_t bytes)
 {
 	u32 i;

 	trace_sst_ipc_outbox_write(bytes);

 	memcpy_toio(sst->mailbox.out_base, message, bytes);

 	for (i = 0; i < bytes; i += 4)
 		trace_sst_ipc_outbox_wdata(i, *(u32 *)(message + i));
 }
 EXPORT_SYMBOL_GPL(sst_dsp_outbox_write);

 void sst_dsp_outbox_read(struct sst_dsp *sst, void *message, size_t bytes)
 {
 	u32 i;

 	trace_sst_ipc_outbox_read(bytes);

 	memcpy_fromio(message, sst->mailbox.out_base, bytes);

 	for (i = 0; i < bytes; i += 4)
 		trace_sst_ipc_outbox_rdata(i, *(u32 *)(message + i));
 }
 EXPORT_SYMBOL_GPL(sst_dsp_outbox_read);

 void sst_dsp_inbox_write(struct sst_dsp *sst, void *message, size_t bytes)
 {
 	u32 i;

 	trace_sst_ipc_inbox_write(bytes);

 	memcpy_toio(sst->mailbox.in_base, message, bytes);

 	for (i = 0; i < bytes; i += 4)
 		trace_sst_ipc_inbox_wdata(i, *(u32 *)(message + i));
 }
 EXPORT_SYMBOL_GPL(sst_dsp_inbox_write);

 void sst_dsp_inbox_read(struct sst_dsp *sst, void *message, size_t bytes)
 {
 	u32 i;

 	trace_sst_ipc_inbox_read(bytes);

 	memcpy_fromio(message, sst->mailbox.in_base, bytes);

 	for (i = 0; i < bytes; i += 4)
 		trace_sst_ipc_inbox_rdata(i, *(u32 *)(message + i));
 }
 EXPORT_SYMBOL_GPL(sst_dsp_inbox_read);

 #ifdef CONFIG_DW_DMAC_CORE
 struct sst_dsp *sst_dsp_new(struct device *dev,
 	struct sst_dsp_device *sst_dev, struct sst_pdata *pdata)
 {
 	struct sst_dsp *sst;
 	int err;

 	dev_dbg(dev, "initialising audio DSP id 0x%x\n", pdata->id);

 	sst = devm_kzalloc(dev, sizeof(*sst), GFP_KERNEL);
 	if (sst == NULL)
 		return NULL;

 	spin_lock_init(&sst->spinlock);
 	mutex_init(&sst->mutex);
 	sst->dev = dev;
 	sst->dma_dev = pdata->dma_dev;
 	sst->thread_context = sst_dev->thread_context;
 	sst->sst_dev = sst_dev;
 	sst->id = pdata->id;
 	sst->irq = pdata->irq;
 	sst->ops = sst_dev->ops;
 	sst->pdata = pdata;
 	INIT_LIST_HEAD(&sst->used_block_list);
 	INIT_LIST_HEAD(&sst->free_block_list);
 	INIT_LIST_HEAD(&sst->module_list);
 	INIT_LIST_HEAD(&sst->fw_list);
 	INIT_LIST_HEAD(&sst->scratch_block_list);

 	/* Initialise SST Audio DSP */
 	if (sst->ops->init) {
 		err = sst->ops->init(sst, pdata);
 		if (err < 0)
 			return NULL;
 	}

 	/* Register the ISR */
 	err = request_threaded_irq(sst->irq, sst->ops->irq_handler,
 		sst_dev->thread, IRQF_SHARED, "AudioDSP", sst);
 	if (err)
 		goto irq_err;

 	err = sst_dma_new(sst);
 	if (err)
 		dev_warn(dev, "sst_dma_new failed %d\n", err);

 	return sst;

 irq_err:
 	if (sst->ops->free)
 		sst->ops->free(sst);

 	return NULL;
 }
 EXPORT_SYMBOL_GPL(sst_dsp_new);

 void sst_dsp_free(struct sst_dsp *sst)
 {
 	free_irq(sst->irq, sst);
 	if (sst->ops->free)
 		sst->ops->free(sst);

 	sst_dma_free(sst->dma);
 }
 EXPORT_SYMBOL_GPL(sst_dsp_free);
 #endif

 /* Module information */
 MODULE_AUTHOR("Liam Girdwood");
 MODULE_DESCRIPTION("Intel SST Core");
 MODULE_LICENSE("GPL v2");
	/*
	* Intel Smart Sound Technology (SST) DSP Core Driver
	*
	* Copyright (C) 2013, Intel Corporation. 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 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.
	*
	*/

	#include <linux/slab.h>
	#include <linux/export.h>
	#include <linux/interrupt.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/io.h>
	#include <linux/delay.h>

	#include "sst-dsp.h"
	#include "sst-dsp-priv.h"

	#define CREATE_TRACE_POINTS
	#include <trace/events/intel-sst.h>

	/* Internal generic low-level SST IO functions - can be overidden */
	void sst_shim32_write(void __iomem *addr, u32 offset, u32 value)
	{
	writel(value, addr + offset);
	}
	EXPORT_SYMBOL_GPL(sst_shim32_write);

	u32 sst_shim32_read(void __iomem *addr, u32 offset)
	{
	return readl(addr + offset);
	}
	EXPORT_SYMBOL_GPL(sst_shim32_read);

	void sst_shim32_write64(void __iomem *addr, u32 offset, u64 value)
	{
	memcpy_toio(addr + offset, &value, sizeof(value));
	}
	EXPORT_SYMBOL_GPL(sst_shim32_write64);

	u64 sst_shim32_read64(void __iomem *addr, u32 offset)
	{
	u64 val;

	memcpy_fromio(&val, addr + offset, sizeof(val));
	return val;
	}
	EXPORT_SYMBOL_GPL(sst_shim32_read64);

	static inline void _sst_memcpy_toio_32(volatile u32 __iomem *dest,
	u32 *src, size_t bytes)
	{
	int i, words = bytes >> 2;

	for (i = 0; i < words; i++)
	writel(src[i], dest + i);
	}

	static inline void _sst_memcpy_fromio_32(u32 *dest,
	const volatile __iomem u32 *src, size_t bytes)
	{
	int i, words = bytes >> 2;

	for (i = 0; i < words; i++)
	dest[i] = readl(src + i);
	}

	void sst_memcpy_toio_32(struct sst_dsp *sst,
	void __iomem dest, void src, size_t bytes)
	{
	_sst_memcpy_toio_32(dest, src, bytes);
	}
	EXPORT_SYMBOL_GPL(sst_memcpy_toio_32);

	void sst_memcpy_fromio_32(struct sst_dsp sst, void dest,
	void __iomem *src, size_t bytes)
	{
	_sst_memcpy_fromio_32(dest, src, bytes);
	}
	EXPORT_SYMBOL_GPL(sst_memcpy_fromio_32);

	/* Public API */
	void sst_dsp_shim_write(struct sst_dsp *sst, u32 offset, u32 value)
	{
	unsigned long flags;

	spin_lock_irqsave(&sst->spinlock, flags);
	sst->ops->write(sst->addr.shim, offset, value);
	spin_unlock_irqrestore(&sst->spinlock, flags);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_write);

	u32 sst_dsp_shim_read(struct sst_dsp *sst, u32 offset)
	{
	unsigned long flags;
	u32 val;

	spin_lock_irqsave(&sst->spinlock, flags);
	val = sst->ops->read(sst->addr.shim, offset);
	spin_unlock_irqrestore(&sst->spinlock, flags);

	return val;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_read);

	void sst_dsp_shim_write64(struct sst_dsp *sst, u32 offset, u64 value)
	{
	unsigned long flags;

	spin_lock_irqsave(&sst->spinlock, flags);
	sst->ops->write64(sst->addr.shim, offset, value);
	spin_unlock_irqrestore(&sst->spinlock, flags);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_write64);

	u64 sst_dsp_shim_read64(struct sst_dsp *sst, u32 offset)
	{
	unsigned long flags;
	u64 val;

	spin_lock_irqsave(&sst->spinlock, flags);
	val = sst->ops->read64(sst->addr.shim, offset);
	spin_unlock_irqrestore(&sst->spinlock, flags);

	return val;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_read64);

	void sst_dsp_shim_write_unlocked(struct sst_dsp *sst, u32 offset, u32 value)
	{
	sst->ops->write(sst->addr.shim, offset, value);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_write_unlocked);

	u32 sst_dsp_shim_read_unlocked(struct sst_dsp *sst, u32 offset)
	{
	return sst->ops->read(sst->addr.shim, offset);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_read_unlocked);

	void sst_dsp_shim_write64_unlocked(struct sst_dsp *sst, u32 offset, u64 value)
	{
	sst->ops->write64(sst->addr.shim, offset, value);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_write64_unlocked);

	u64 sst_dsp_shim_read64_unlocked(struct sst_dsp *sst, u32 offset)
	{
	return sst->ops->read64(sst->addr.shim, offset);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_read64_unlocked);

	int sst_dsp_shim_update_bits_unlocked(struct sst_dsp *sst, u32 offset,
	u32 mask, u32 value)
	{
	bool change;
	unsigned int old, new;
	u32 ret;

	ret = sst_dsp_shim_read_unlocked(sst, offset);

	old = ret;
	new = (old & (~mask)) \| (value & mask);

	change = (old != new);
	if (change)
	sst_dsp_shim_write_unlocked(sst, offset, new);

	return change;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_unlocked);

	int sst_dsp_shim_update_bits64_unlocked(struct sst_dsp *sst, u32 offset,
	u64 mask, u64 value)
	{
	bool change;
	u64 old, new;

	old = sst_dsp_shim_read64_unlocked(sst, offset);

	new = (old & (~mask)) \| (value & mask);

	change = (old != new);
	if (change)
	sst_dsp_shim_write64_unlocked(sst, offset, new);

	return change;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64_unlocked);

	/* This is for registers bits with attribute RWC */
	void sst_dsp_shim_update_bits_forced_unlocked(struct sst_dsp *sst, u32 offset,
	u32 mask, u32 value)
	{
	unsigned int old, new;
	u32 ret;

	ret = sst_dsp_shim_read_unlocked(sst, offset);

	old = ret;
	new = (old & (~mask)) \| (value & mask);

	sst_dsp_shim_write_unlocked(sst, offset, new);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced_unlocked);

	int sst_dsp_shim_update_bits(struct sst_dsp *sst, u32 offset,
	u32 mask, u32 value)
	{
	unsigned long flags;
	bool change;

	spin_lock_irqsave(&sst->spinlock, flags);
	change = sst_dsp_shim_update_bits_unlocked(sst, offset, mask, value);
	spin_unlock_irqrestore(&sst->spinlock, flags);
	return change;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits);

	int sst_dsp_shim_update_bits64(struct sst_dsp *sst, u32 offset,
	u64 mask, u64 value)
	{
	unsigned long flags;
	bool change;

	spin_lock_irqsave(&sst->spinlock, flags);
	change = sst_dsp_shim_update_bits64_unlocked(sst, offset, mask, value);
	spin_unlock_irqrestore(&sst->spinlock, flags);
	return change;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits64);

	/* This is for registers bits with attribute RWC */
	void sst_dsp_shim_update_bits_forced(struct sst_dsp *sst, u32 offset,
	u32 mask, u32 value)
	{
	unsigned long flags;

	spin_lock_irqsave(&sst->spinlock, flags);
	sst_dsp_shim_update_bits_forced_unlocked(sst, offset, mask, value);
	spin_unlock_irqrestore(&sst->spinlock, flags);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_shim_update_bits_forced);

	int sst_dsp_register_poll(struct sst_dsp *ctx, u32 offset, u32 mask,
	u32 target, u32 timeout, char *operation)
	{
	int time, ret;
	u32 reg;
	bool done = false;

	/*
	* we will poll for couple of ms using mdelay, if not successful
	* then go to longer sleep using usleep_range
	*/

	/* check if set state successful */
	for (time = 0; time < 5; time++) {
	if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target) {
	done = true;
	break;
	}
	mdelay(1);
	}

	if (done == false) {
	/* sleeping in 10ms steps so adjust timeout value */
	timeout /= 10;

	for (time = 0; time < timeout; time++) {
	if ((sst_dsp_shim_read_unlocked(ctx, offset) & mask) == target)
	break;

	usleep_range(5000, 10000);
	}
	}

	reg = sst_dsp_shim_read_unlocked(ctx, offset);
	dev_info(ctx->dev, "FW Poll Status: reg=%#x %s %s\n", reg, operation,
	(time < timeout) ? "successful" : "timedout");
	ret = time < timeout ? 0 : -ETIME;

	return ret;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_register_poll);

	void sst_dsp_dump(struct sst_dsp *sst)
	{
	if (sst->ops->dump)
	sst->ops->dump(sst);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_dump);

	void sst_dsp_reset(struct sst_dsp *sst)
	{
	if (sst->ops->reset)
	sst->ops->reset(sst);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_reset);

	int sst_dsp_boot(struct sst_dsp *sst)
	{
	if (sst->ops->boot)
	sst->ops->boot(sst);

	return 0;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_boot);

	int sst_dsp_wake(struct sst_dsp *sst)
	{
	if (sst->ops->wake)
	return sst->ops->wake(sst);

	return 0;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_wake);

	void sst_dsp_sleep(struct sst_dsp *sst)
	{
	if (sst->ops->sleep)
	sst->ops->sleep(sst);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_sleep);

	void sst_dsp_stall(struct sst_dsp *sst)
	{
	if (sst->ops->stall)
	sst->ops->stall(sst);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_stall);

	void sst_dsp_ipc_msg_tx(struct sst_dsp *dsp, u32 msg)
	{
	sst_dsp_shim_write_unlocked(dsp, SST_IPCX, msg \| SST_IPCX_BUSY);
	trace_sst_ipc_msg_tx(msg);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_tx);

	u32 sst_dsp_ipc_msg_rx(struct sst_dsp *dsp)
	{
	u32 msg;

	msg = sst_dsp_shim_read_unlocked(dsp, SST_IPCX);
	trace_sst_ipc_msg_rx(msg);

	return msg;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_ipc_msg_rx);

	int sst_dsp_mailbox_init(struct sst_dsp *sst, u32 inbox_offset, size_t inbox_size,
	u32 outbox_offset, size_t outbox_size)
	{
	sst->mailbox.in_base = sst->addr.lpe + inbox_offset;
	sst->mailbox.out_base = sst->addr.lpe + outbox_offset;
	sst->mailbox.in_size = inbox_size;
	sst->mailbox.out_size = outbox_size;
	return 0;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_mailbox_init);

	void sst_dsp_outbox_write(struct sst_dsp sst, void message, size_t bytes)
	{
	u32 i;

	trace_sst_ipc_outbox_write(bytes);

	memcpy_toio(sst->mailbox.out_base, message, bytes);

	for (i = 0; i < bytes; i += 4)
	trace_sst_ipc_outbox_wdata(i, (u32 )(message + i));
	}
	EXPORT_SYMBOL_GPL(sst_dsp_outbox_write);

	void sst_dsp_outbox_read(struct sst_dsp sst, void message, size_t bytes)
	{
	u32 i;

	trace_sst_ipc_outbox_read(bytes);

	memcpy_fromio(message, sst->mailbox.out_base, bytes);

	for (i = 0; i < bytes; i += 4)
	trace_sst_ipc_outbox_rdata(i, (u32 )(message + i));
	}
	EXPORT_SYMBOL_GPL(sst_dsp_outbox_read);

	void sst_dsp_inbox_write(struct sst_dsp sst, void message, size_t bytes)
	{
	u32 i;

	trace_sst_ipc_inbox_write(bytes);

	memcpy_toio(sst->mailbox.in_base, message, bytes);

	for (i = 0; i < bytes; i += 4)
	trace_sst_ipc_inbox_wdata(i, (u32 )(message + i));
	}
	EXPORT_SYMBOL_GPL(sst_dsp_inbox_write);

	void sst_dsp_inbox_read(struct sst_dsp sst, void message, size_t bytes)
	{
	u32 i;

	trace_sst_ipc_inbox_read(bytes);

	memcpy_fromio(message, sst->mailbox.in_base, bytes);

	for (i = 0; i < bytes; i += 4)
	trace_sst_ipc_inbox_rdata(i, (u32 )(message + i));
	}
	EXPORT_SYMBOL_GPL(sst_dsp_inbox_read);

	#ifdef CONFIG_DW_DMAC_CORE
	struct sst_dsp sst_dsp_new(struct device dev,
	struct sst_dsp_device sst_dev, struct sst_pdata pdata)
	{
	struct sst_dsp *sst;
	int err;

	dev_dbg(dev, "initialising audio DSP id 0x%x\n", pdata->id);

	sst = devm_kzalloc(dev, sizeof(*sst), GFP_KERNEL);
	if (sst == NULL)
	return NULL;

	spin_lock_init(&sst->spinlock);
	mutex_init(&sst->mutex);
	sst->dev = dev;
	sst->dma_dev = pdata->dma_dev;
	sst->thread_context = sst_dev->thread_context;
	sst->sst_dev = sst_dev;
	sst->id = pdata->id;
	sst->irq = pdata->irq;
	sst->ops = sst_dev->ops;
	sst->pdata = pdata;
	INIT_LIST_HEAD(&sst->used_block_list);
	INIT_LIST_HEAD(&sst->free_block_list);
	INIT_LIST_HEAD(&sst->module_list);
	INIT_LIST_HEAD(&sst->fw_list);
	INIT_LIST_HEAD(&sst->scratch_block_list);

	/* Initialise SST Audio DSP */
	if (sst->ops->init) {
	err = sst->ops->init(sst, pdata);
	if (err < 0)
	return NULL;
	}

	/* Register the ISR */
	err = request_threaded_irq(sst->irq, sst->ops->irq_handler,
	sst_dev->thread, IRQF_SHARED, "AudioDSP", sst);
	if (err)
	goto irq_err;

	err = sst_dma_new(sst);
	if (err)
	dev_warn(dev, "sst_dma_new failed %d\n", err);

	return sst;

	irq_err:
	if (sst->ops->free)
	sst->ops->free(sst);

	return NULL;
	}
	EXPORT_SYMBOL_GPL(sst_dsp_new);

	void sst_dsp_free(struct sst_dsp *sst)
	{
	free_irq(sst->irq, sst);
	if (sst->ops->free)
	sst->ops->free(sst);

	sst_dma_free(sst->dma);
	}
	EXPORT_SYMBOL_GPL(sst_dsp_free);
	#endif

	/* Module information */
	MODULE_AUTHOR("Liam Girdwood");
	MODULE_DESCRIPTION("Intel SST Core");
	MODULE_LICENSE("GPL v2");