Message-Id: <1306827939-4133-2-git-send-email-subhasish@mistralsolutions.com>
Date:	Tue, 31 May 2011 13:15:39 +0530
From:	Subhasish Ghosh <subhasish@...tralsolutions.com>
To:	davinci-linux-open-source@...ux.davincidsp.com
Cc:	linux-arm-kernel@...ts.infradead.org, m-watkins@...com,
	sachi@...tralsolutions.com, stalin.s@...tralsolutions.com,
	Subhasish Ghosh <subhasish@...tralsolutions.com>,
	Greg Kroah-Hartman <gregkh@...e.de> (maintainer:STAGING SUBSYSTEM),
	devel@...verdev.osuosl.org (open list:STAGING SUBSYSTEM),
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v5 1/1] drivers:staging:pruss: add pruss staging mfd driver.

This patch adds the pruss MFD driver and associated include files.
For details regarding the PRUSS please refer the folowing link:
http://processors.wiki.ti.com/index.php/Programmable_Realtime_Unit_Subsystem

The rational behind the MFD driver being the fact that multiple devices can
be implemented on the cores independently. This is determined by the nature
of the program which is loaded into the PRU's instruction memory.
A device may be de-initialized and another loaded or two different devices
can be run simultaneously on the two cores.
It's also possible, as in our case, to implement a single device on both
the PRU's resulting in improved load sharing.

Signed-off-by: Subhasish Ghosh <subhasish@...tralsolutions.com>
---
 drivers/staging/Kconfig            |    2 +
 drivers/staging/Makefile           |    1 +
 drivers/staging/pruss/Kconfig      |   16 ++
 drivers/staging/pruss/Makefile     |    5 +
 drivers/staging/pruss/TODO         |   14 +
 drivers/staging/pruss/pruss.c      |  483 ++++++++++++++++++++++++++++++++++++
 drivers/staging/pruss/pruss.h      |  130 ++++++++++
 drivers/staging/pruss/pruss_core.h |  132 ++++++++++
 8 files changed, 783 insertions(+), 0 deletions(-)
 create mode 100644 drivers/staging/pruss/Kconfig
 create mode 100644 drivers/staging/pruss/Makefile
 create mode 100644 drivers/staging/pruss/TODO
 create mode 100644 drivers/staging/pruss/pruss.c
 create mode 100644 drivers/staging/pruss/pruss.h
 create mode 100644 drivers/staging/pruss/pruss_core.h

diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 5c8fcfc..9cbf201 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -179,5 +179,7 @@ source "drivers/staging/cptm1217/Kconfig"
 
 source "drivers/staging/ste_rmi4/Kconfig"
 
+source "drivers/staging/pruss/Kconfig"
+
 endif # !STAGING_EXCLUDE_BUILD
 endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index d538863..2296c34 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -70,3 +70,4 @@ obj-$(CONFIG_SND_INTEL_SST)		+= intel_sst/
 obj-$(CONFIG_SPEAKUP)	+= speakup/
 obj-$(CONFIG_TOUCHSCREEN_CLEARPAD_TM1217)	+= cptm1217/
 obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_I2C_RMI4)	+= ste_rmi4/
+obj-$(CONFIG_MFD_DA8XX_PRUSS)	+= pruss/
diff --git a/drivers/staging/pruss/Kconfig b/drivers/staging/pruss/Kconfig
new file mode 100644
index 0000000..f426b67
--- /dev/null
+++ b/drivers/staging/pruss/Kconfig
@@ -0,0 +1,16 @@
+#
+# TI's pruss staging drivers
+#
+
+menu "Texas Instruments pruss drivers"
+
+config MFD_DA8XX_PRUSS
+	tristate "Texas Instruments DA8XX PRUSS support"
+	depends on ARCH_DAVINCI_DA850
+	select MFD_CORE
+	help
+	  This driver provides support API for the programmable
+	  realtime unit (PRU) present on TI's da8xx processors. It
+	  provides basic read, write, config, enable, disable
+	  routines to facilitate devices emulated on it.
+endmenu
diff --git a/drivers/staging/pruss/Makefile b/drivers/staging/pruss/Makefile
new file mode 100644
index 0000000..a9c657b
--- /dev/null
+++ b/drivers/staging/pruss/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for TI's pruss drivers
+#
+
+obj-$(CONFIG_MFD_DA8XX_PRUSS) 		+= pruss.o
diff --git a/drivers/staging/pruss/TODO b/drivers/staging/pruss/TODO
new file mode 100644
index 0000000..38a8ec7
--- /dev/null
+++ b/drivers/staging/pruss/TODO
@@ -0,0 +1,14 @@
+TODO:
+
+0. Functionality wise, everything works.
+
+1. Currently the plan is to add sysfs attributes for
+	a. prux/load
+	b. prux/unload
+	c. prux/run
+	d. prux/halt
+   These will add to a more dynamic firmware management for the PRU.
+
+2. But, not sure how the fdt will effect these entries.
+
+Please send patches to Greg Kroah-Hartman <greg@...ah.com>.
diff --git a/drivers/staging/pruss/pruss.c b/drivers/staging/pruss/pruss.c
new file mode 100644
index 0000000..8f1455b
--- /dev/null
+++ b/drivers/staging/pruss/pruss.c
@@ -0,0 +1,483 @@
+/*
+ * Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ *
+ * 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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/spinlock.h>
+#include <linux/errno.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+/* #include <linux/mfd/pruss.h> */
+#include "pruss.h"
+#include <linux/mfd/core.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+
+struct pruss_priv {
+	struct device *dev;
+	spinlock_t lock;
+	struct resource *res;
+	struct clk *clk;
+	void __iomem *ioaddr;
+};
+
+int pruss_disable(struct device *dev, u8 pruss_num)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	struct prusscore_regs __iomem *h_pruss;
+	struct pruss_map __iomem *pruss_mmap = pruss->ioaddr;
+	u32 temp_reg;
+
+	if ((pruss_num != PRUCORE_0) && (pruss_num != PRUCORE_1))
+		return -EINVAL;
+
+	spin_lock(&pruss->lock);
+
+	/* pruss deinit */
+	iowrite32(0xFFFFFFFF, &pruss_mmap->intc.statclrint[pruss_num]);
+
+	/* Disable PRU */
+	h_pruss = &pruss_mmap->core[pruss_num];
+	temp_reg = ioread32(&h_pruss->control);
+	temp_reg = (temp_reg &
+			~PRUCORE_CONTROL_COUNTENABLE_MASK) |
+			((PRUCORE_CONTROL_COUNTENABLE_DISABLE <<
+			PRUCORE_CONTROL_COUNTENABLE_SHIFT) &
+			PRUCORE_CONTROL_COUNTENABLE_MASK);
+	iowrite32(temp_reg, &h_pruss->control);
+
+	temp_reg = ioread32(&h_pruss->control);
+	temp_reg = (temp_reg &
+		~PRUCORE_CONTROL_ENABLE_MASK) |
+		((PRUCORE_CONTROL_ENABLE_DISABLE <<
+		PRUCORE_CONTROL_ENABLE_SHIFT) &
+		PRUCORE_CONTROL_ENABLE_MASK);
+	iowrite32(temp_reg, &h_pruss->control);
+
+	/* Reset PRU */
+	iowrite32(PRUCORE_CONTROL_RESETVAL,
+				&h_pruss->control);
+	spin_unlock(&pruss->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pruss_disable);
+
+int pruss_enable(struct device *dev, u8 pruss_num)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	struct prusscore_regs __iomem *h_pruss;
+	struct pruss_map __iomem *pruss_mmap = pruss->ioaddr;
+	int i;
+
+	if ((pruss_num != PRUCORE_0) && (pruss_num != PRUCORE_1))
+		return -EINVAL;
+
+	h_pruss = &pruss_mmap->core[pruss_num];
+
+	/* Reset PRU  */
+	spin_lock(&pruss->lock);
+	iowrite32(PRUCORE_CONTROL_RESETVAL, &h_pruss->control);
+	spin_unlock(&pruss->lock);
+
+	/* Reset any garbage in the ram */
+	for (i = 0; i < PRUSS_PRU0_RAM_SZ; i++)
+		iowrite32(0x0, &pruss_mmap->dram[pruss_num].dram_dt[i]);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pruss_enable);
+
+/* Load the specified PRU with code */
+int pruss_load(struct device *dev, u8 pruss_num,
+			u32 *pruss_code, u32 code_size_in_words)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	struct pruss_map __iomem *pruss_mmap = pruss->ioaddr;
+	u32 __iomem *pruss_iram;
+	int i;
+
+	if ((pruss_num != PRUCORE_0) && (pruss_num != PRUCORE_1))
+		return -EINVAL;
+
+	pruss_iram = (u32 __iomem *)&pruss_mmap->iram[pruss_num].iram_dt;
+
+	pruss_enable(dev, pruss_num);
+
+	spin_lock(&pruss->lock);
+	/* Copy dMAX code to its instruction RAM  */
+	for (i = 0; i < code_size_in_words; i++)
+		iowrite32(pruss_code[i], (pruss_iram + i));
+
+	spin_unlock(&pruss->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pruss_load);
+
+int pruss_run(struct device *dev, u8 pruss_num)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	struct prusscore_regs __iomem *h_pruss;
+	struct pruss_map __iomem *pruss_mmap = pruss->ioaddr;
+	u32 temp_reg;
+
+	if ((pruss_num != PRUCORE_0) && (pruss_num != PRUCORE_1))
+		return -EINVAL;
+
+	h_pruss = &pruss_mmap->core[pruss_num];
+
+	/* Enable dMAX, let it execute the code we just copied */
+	spin_lock(&pruss->lock);
+	temp_reg = ioread32(&h_pruss->control);
+	temp_reg = (temp_reg &
+			~PRUCORE_CONTROL_COUNTENABLE_MASK) |
+			((PRUCORE_CONTROL_COUNTENABLE_ENABLE <<
+			PRUCORE_CONTROL_COUNTENABLE_SHIFT) &
+			PRUCORE_CONTROL_COUNTENABLE_MASK);
+	iowrite32(temp_reg, &h_pruss->control);
+
+	temp_reg = ioread32(&h_pruss->control);
+	temp_reg = (temp_reg &
+			~PRUCORE_CONTROL_ENABLE_MASK) |
+			((PRUCORE_CONTROL_ENABLE_ENABLE <<
+			PRUCORE_CONTROL_ENABLE_SHIFT) &
+			PRUCORE_CONTROL_ENABLE_MASK);
+	iowrite32(temp_reg, &h_pruss->control);
+	spin_unlock(&pruss->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pruss_run);
+
+int pruss_wait_for_halt(struct device *dev, u8 pruss_num, u32 timeout)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	struct prusscore_regs __iomem *h_pruss;
+	struct pruss_map __iomem *pruss_mmap = pruss->ioaddr;
+	u32 temp_reg;
+	u32 cnt = timeout;
+
+	if ((pruss_num != PRUCORE_0) && (pruss_num != PRUCORE_1))
+		return -EINVAL;
+
+	h_pruss = &pruss_mmap->core[pruss_num];
+
+	while (cnt--) {
+		temp_reg = ioread32(&h_pruss->control);
+		if (((temp_reg & PRUCORE_CONTROL_RUNSTATE_MASK) >>
+				PRUCORE_CONTROL_RUNSTATE_SHIFT) ==
+				PRUCORE_CONTROL_RUNSTATE_HALT)
+			break;
+	}
+	if (!cnt)
+		return -EBUSY;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pruss_wait_for_halt);
+
+void pruss_writeb(struct device *dev, u32 offset, u8 datatowrite)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addresstowrite;
+
+	addresstowrite = pruss->ioaddr + offset;
+	iowrite8(datatowrite, addresstowrite);
+}
+EXPORT_SYMBOL_GPL(pruss_writeb);
+
+void pruss_rmwb(struct device *dev, u32 offset, u8 mask, u8 val)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addr;
+	u32 preg_data;
+
+	addr = pruss->ioaddr + offset;
+
+	spin_lock(&pruss->lock);
+	preg_data = ioread8(addr);
+	preg_data &= ~mask;
+	preg_data |= val;
+	iowrite8(preg_data, addr);
+	spin_unlock(&pruss->lock);
+}
+EXPORT_SYMBOL_GPL(pruss_rmwb);
+
+void pruss_readb(struct device *dev, u32 offset, u8 *datatoread)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addrtoread;
+
+	addrtoread = pruss->ioaddr + offset ;
+	*datatoread = ioread8(addrtoread);
+}
+EXPORT_SYMBOL_GPL(pruss_readb);
+
+void pruss_readb_multi(struct device *dev, u32 offset,
+		u8 *datatoread, u16 bytestoread)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	u8 __iomem *addrtoread;
+	int i;
+
+	addrtoread = pruss->ioaddr + offset;
+
+	for (i = 0; i < bytestoread; i++)
+		*datatoread++ = ioread8(addrtoread++);
+}
+EXPORT_SYMBOL_GPL(pruss_readb_multi);
+
+void pruss_writel(struct device *dev, u32 offset,
+		u32 datatowrite)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addresstowrite;
+
+	addresstowrite = pruss->ioaddr + offset;
+	iowrite32(datatowrite, addresstowrite);
+}
+EXPORT_SYMBOL_GPL(pruss_writel);
+
+void pruss_writel_multi(struct device *dev, u32 offset,
+		u32 *datatowrite, u16 wordstowrite)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	u32 __iomem *addresstowrite;
+	int i;
+
+	addresstowrite = pruss->ioaddr + offset;
+
+	for (i = 0; i < wordstowrite; i++)
+		iowrite32(*datatowrite++, addresstowrite++);
+}
+EXPORT_SYMBOL_GPL(pruss_writel_multi);
+
+void pruss_rmwl(struct device *dev, u32 offset, u32 mask, u32 val)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addr;
+	u32 preg_data;
+
+	addr = pruss->ioaddr + offset;
+
+	spin_lock(&pruss->lock);
+	preg_data = ioread32(addr);
+	preg_data &= ~mask;
+	preg_data |= val;
+	iowrite32(preg_data, addr);
+	spin_unlock(&pruss->lock);
+}
+EXPORT_SYMBOL_GPL(pruss_rmwl);
+
+void pruss_readl(struct device *dev, u32 offset, u32 *datatoread)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addrtoread;
+
+	addrtoread = pruss->ioaddr + offset;
+	*datatoread = ioread32(addrtoread);
+}
+EXPORT_SYMBOL_GPL(pruss_readl);
+
+void pruss_readl_multi(struct device *dev, u32 offset,
+		u32 *datatoread, u16 wordstoread)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	u32 __iomem *addrtoread;
+	int i;
+
+	addrtoread = pruss->ioaddr + offset;
+	for (i = 0; i < wordstoread; i++)
+		*datatoread++ = ioread32(addrtoread++);
+}
+EXPORT_SYMBOL_GPL(pruss_readl_multi);
+
+void pruss_writew(struct device *dev, u32 offset, u16 datatowrite)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addresstowrite;
+
+	addresstowrite = pruss->ioaddr + offset;
+	iowrite16(datatowrite, addresstowrite);
+}
+EXPORT_SYMBOL_GPL(pruss_writew);
+
+void pruss_rmww(struct device *dev, u32 offset, u16 mask, u16 val)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addr;
+	u32 preg_data;
+
+	addr = pruss->ioaddr + offset;
+
+	spin_lock(&pruss->lock);
+	preg_data = ioread16(addr);
+	preg_data &= ~mask;
+	preg_data |= val;
+	iowrite16(preg_data, addr);
+	spin_unlock(&pruss->lock);
+}
+EXPORT_SYMBOL_GPL(pruss_rmww);
+
+void pruss_readw(struct device *dev, u32 offset, u16 *datatoread)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addrtoread;
+
+	addrtoread = pruss->ioaddr + offset;
+	*datatoread = ioread16(addrtoread);
+}
+EXPORT_SYMBOL_GPL(pruss_readw);
+
+void pruss_idx_writel(struct device *dev, u32 offset, u32 value)
+{
+	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
+	void __iomem *addresstowrite;
+
+	addresstowrite = pruss->ioaddr + offset;
+	iowrite32(value, addresstowrite);
+}
+EXPORT_SYMBOL_GPL(pruss_idx_writel);
+
+static int pruss_mfd_add_devices(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mfd_cell *cell = pdev->dev.platform_data;
+	s32 err, num_devices = 0;
+	int i;
+
+	for (i = 0; cell[i].name; i++) {
+		err = mfd_add_devices(dev, 0, &cell[i], 1, NULL, 0);
+		if (err) {
+			dev_err(dev, "cannot add mfd cell: %s\n",
+						cell[i].name);
+			continue;
+		}
+		num_devices++;
+		dev_info(dev, "mfd: added %s device\n", cell[i].name);
+	}
+
+	return num_devices;
+}
+
+static int __devinit pruss_probe(struct platform_device *pdev)
+{
+	struct pruss_priv *pruss_dev = NULL;
+	s32 err;
+
+	pruss_dev = kzalloc(sizeof(struct pruss_priv), GFP_KERNEL);
+	if (!pruss_dev)
+		return -ENOMEM;
+
+	pruss_dev->res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!pruss_dev->res) {
+		dev_err(&pdev->dev,
+		"unable to get pruss memory resources!\n");
+		err = -ENODEV;
+		goto probe_exit_kfree;
+	}
+
+	if (!request_mem_region(pruss_dev->res->start,
+		resource_size(pruss_dev->res), dev_name(&pdev->dev))) {
+		dev_err(&pdev->dev, "pruss memory region already claimed!\n");
+		err = -EBUSY;
+		goto probe_exit_kfree;
+	}
+
+	pruss_dev->ioaddr = ioremap(pruss_dev->res->start,
+	resource_size(pruss_dev->res));
+	if (!pruss_dev->ioaddr) {
+		dev_err(&pdev->dev, "ioremap failed\n");
+		err = -ENOMEM;
+		goto probe_exit_free_region;
+	}
+
+	pruss_dev->clk = clk_get(NULL, "pruss");
+	if (IS_ERR(pruss_dev->clk)) {
+		dev_err(&pdev->dev, "no clock available: pruss\n");
+		err = -ENODEV;
+		pruss_dev->clk = NULL;
+		goto probe_exit_iounmap;
+	}
+	spin_lock_init(&pruss_dev->lock);
+
+	clk_enable(pruss_dev->clk);
+
+	err = pruss_mfd_add_devices(pdev);
+	if (!err)
+		goto probe_exit_clock;
+
+	platform_set_drvdata(pdev, pruss_dev);
+	pruss_dev->dev = &pdev->dev;
+	return 0;
+
+probe_exit_clock:
+	clk_put(pruss_dev->clk);
+	clk_disable(pruss_dev->clk);
+probe_exit_iounmap:
+	iounmap(pruss_dev->ioaddr);
+probe_exit_free_region:
+	release_mem_region(pruss_dev->res->start,
+			resource_size(pruss_dev->res));
+probe_exit_kfree:
+	kfree(pruss_dev);
+	return err;
+}
+
+static int __devexit pruss_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct pruss_priv *pruss = dev_get_drvdata(dev);
+
+	mfd_remove_devices(dev);
+	pruss_disable(dev, PRUCORE_0);
+	pruss_disable(dev, PRUCORE_1);
+	clk_disable(pruss->clk);
+	clk_put(pruss->clk);
+	iounmap(pruss->ioaddr);
+	release_mem_region(pruss->res->start, resource_size(pruss->res));
+	kfree(pruss);
+	dev_set_drvdata(dev, NULL);
+	return 0;
+}
+
+static struct platform_driver pruss_driver = {
+	.probe	= pruss_probe,
+	.remove	= __devexit_p(pruss_remove),
+	.driver	= {
+		.name	= "pruss_mfd",
+		.owner	= THIS_MODULE,
+	}
+};
+
+static int __init pruss_init(void)
+{
+	return platform_driver_register(&pruss_driver);
+}
+module_init(pruss_init);
+
+static void __exit pruss_exit(void)
+{
+	platform_driver_unregister(&pruss_driver);
+}
+module_exit(pruss_exit);
+
+MODULE_DESCRIPTION("Programmable Realtime Unit (PRU) Driver");
+MODULE_AUTHOR("Subhasish Ghosh");
+MODULE_LICENSE("GPL");
diff --git a/drivers/staging/pruss/pruss.h b/drivers/staging/pruss/pruss.h
new file mode 100644
index 0000000..dd3b2d6
--- /dev/null
+++ b/drivers/staging/pruss/pruss.h
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ * Author: Jitendra Kumar <jitendra@...tralsolutions.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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _PRUSS_H_
+#define _PRUSS_H_
+
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include "pruss_core.h"
+
+#define PRUSS_NUM0			PRUCORE_0
+#define PRUSS_NUM1			PRUCORE_1
+
+#define PRUSS_PRU0_RAM_SZ		512
+#define PRUSS_PRU1_RAM_SZ		512
+#define PRUSS_PRU0_BASE_ADDRESS		0
+#define PRUSS_PRU1_BASE_ADDRESS		0x2000
+#define PRUSS_INTC_BASE_ADDRESS		(PRUSS_PRU0_BASE_ADDRESS + 0x4000)
+#define PRUSS_INTC_GLBLEN		(PRUSS_INTC_BASE_ADDRESS + 0x10)
+#define PRUSS_INTC_GLBLNSTLVL		(PRUSS_INTC_BASE_ADDRESS + 0x1C)
+#define PRUSS_INTC_STATIDXSET		(PRUSS_INTC_BASE_ADDRESS + 0x20)
+#define PRUSS_INTC_STATIDXCLR		(PRUSS_INTC_BASE_ADDRESS + 0x24)
+#define PRUSS_INTC_ENIDXSET		(PRUSS_INTC_BASE_ADDRESS + 0x28)
+#define PRUSS_INTC_ENIDXCLR		(PRUSS_INTC_BASE_ADDRESS + 0x2C)
+#define PRUSS_INTC_HSTINTENIDXSET	(PRUSS_INTC_BASE_ADDRESS + 0x34)
+#define PRUSS_INTC_HSTINTENIDXCLR	(PRUSS_INTC_BASE_ADDRESS + 0x38)
+#define PRUSS_INTC_GLBLPRIIDX		(PRUSS_INTC_BASE_ADDRESS + 0x80)
+#define PRUSS_INTC_STATSETINT0		(PRUSS_INTC_BASE_ADDRESS + 0x200)
+#define PRUSS_INTC_STATSETINT1		(PRUSS_INTC_BASE_ADDRESS + 0x204)
+#define PRUSS_INTC_STATCLRINT0		(PRUSS_INTC_BASE_ADDRESS + 0x280)
+#define PRUSS_INTC_STATCLRINT1		(PRUSS_INTC_BASE_ADDRESS + 0x284)
+#define PRUSS_INTC_ENABLESET0		(PRUSS_INTC_BASE_ADDRESS + 0x300)
+#define PRUSS_INTC_ENABLESET1		(PRUSS_INTC_BASE_ADDRESS + 0x304)
+#define PRUSS_INTC_ENABLECLR0		(PRUSS_INTC_BASE_ADDRESS + 0x380)
+#define PRUSS_INTC_ENABLECLR1		(PRUSS_INTC_BASE_ADDRESS + 0x384)
+#define PRUSS_INTC_CHANMAP0		(PRUSS_INTC_BASE_ADDRESS + 0x400)
+#define PRUSS_INTC_CHANMAP1		(PRUSS_INTC_BASE_ADDRESS + 0x404)
+#define PRUSS_INTC_CHANMAP2		(PRUSS_INTC_BASE_ADDRESS + 0x408)
+#define PRUSS_INTC_CHANMAP3		(PRUSS_INTC_BASE_ADDRESS + 0x40C)
+#define PRUSS_INTC_CHANMAP4		(PRUSS_INTC_BASE_ADDRESS + 0x410)
+#define PRUSS_INTC_CHANMAP5		(PRUSS_INTC_BASE_ADDRESS + 0x414)
+#define PRUSS_INTC_CHANMAP6		(PRUSS_INTC_BASE_ADDRESS + 0x418)
+#define PRUSS_INTC_CHANMAP7		(PRUSS_INTC_BASE_ADDRESS + 0x41C)
+#define PRUSS_INTC_CHANMAP8		(PRUSS_INTC_BASE_ADDRESS + 0x420)
+#define PRUSS_INTC_CHANMAP9		(PRUSS_INTC_BASE_ADDRESS + 0x424)
+#define PRUSS_INTC_CHANMAP10		(PRUSS_INTC_BASE_ADDRESS + 0x428)
+#define PRUSS_INTC_CHANMAP11		(PRUSS_INTC_BASE_ADDRESS + 0x42C)
+#define PRUSS_INTC_CHANMAP12		(PRUSS_INTC_BASE_ADDRESS + 0x430)
+#define PRUSS_INTC_CHANMAP13		(PRUSS_INTC_BASE_ADDRESS + 0x434)
+#define PRUSS_INTC_CHANMAP14		(PRUSS_INTC_BASE_ADDRESS + 0x438)
+#define PRUSS_INTC_CHANMAP15		(PRUSS_INTC_BASE_ADDRESS + 0x43C)
+#define PRUSS_INTC_HOSTMAP0		(PRUSS_INTC_BASE_ADDRESS + 0x800)
+#define PRUSS_INTC_HOSTMAP1		(PRUSS_INTC_BASE_ADDRESS + 0x804)
+#define PRUSS_INTC_HOSTMAP2		(PRUSS_INTC_BASE_ADDRESS + 0x808)
+#define PRUSS_INTC_POLARITY0		(PRUSS_INTC_BASE_ADDRESS + 0xD00)
+#define PRUSS_INTC_POLARITY1		(PRUSS_INTC_BASE_ADDRESS + 0xD04)
+#define PRUSS_INTC_TYPE0		(PRUSS_INTC_BASE_ADDRESS + 0xD80)
+#define PRUSS_INTC_TYPE1		(PRUSS_INTC_BASE_ADDRESS + 0xD84)
+#define PRUSS_INTC_HOSTINTEN		(PRUSS_INTC_BASE_ADDRESS + 0x1500)
+#define PRUSS_INTC_HOSTINTLVL_MAX	9
+
+#define PRU_INTC_HOSTMAP0_CHAN		(0x03020100)
+#define PRU_INTC_HOSTMAP1_CHAN		(0x07060504)
+#define PRU_INTC_HOSTMAP2_CHAN		(0x00000908)
+
+#define PRU_INTC_CHANMAP7_SYS_EVT31	(0x00000000)
+#define PRU_INTC_CHANMAP8_FULL		(0x02020100)
+#define PRU_INTC_CHANMAP9_FULL		(0x04040303)
+#define PRU_INTC_CHANMAP10_FULL		(0x06060505)
+#define PRU_INTC_CHANMAP11_FULL		(0x08080707)
+#define PRU_INTC_CHANMAP12_FULL		(0x00010909)
+#define PRU_INTC_CHANMAP8_HALF		(0x03020100)
+#define PRU_INTC_CHANMAP9_HALF		(0x07060504)
+#define PRU_INTC_CHANMAP10_HALF		(0x03020908)
+#define PRU_INTC_CHANMAP11_HALF		(0x07060504)
+#define PRU_INTC_CHANMAP12_HALF		(0x00010908)
+#define PRU_INTC_REGMAP_MASK		(0xFFFFFFFF)
+
+int pruss_enable(struct device *dev, u8 pruss_num);
+
+int pruss_load(struct device *dev, u8 pruss_num,
+	u32 *pruss_code, u32 code_size_in_words);
+
+int pruss_run(struct device *dev, u8 pruss_num);
+
+int pruss_wait_for_halt(struct device *dev, u8 pruss_num, u32 timeout);
+
+int pruss_disable(struct device *dev, u8 pruss_num);
+
+void pruss_writeb(struct device *dev, u32 offset, u8 pdatatowrite);
+
+void pruss_rmwb(struct device *dev, u32 offset, u8 mask, u8 val);
+
+void pruss_readb(struct device *dev, u32 offset, u8 *pdatatoread);
+
+void pruss_readb_multi(struct device *dev, u32 offset,
+		u8 *pdatatoread, u16 bytestoread);
+
+void pruss_readl(struct device *dev, u32 offset, u32 *pdatatoread);
+
+void pruss_readl_multi(struct device *dev, u32 offset,
+		u32 *pdatatoread, u16 wordstoread);
+
+void pruss_writel(struct device *dev, u32 offset, u32 pdatatowrite);
+
+void pruss_writel_multi(struct device *dev, u32 offset,
+		u32 *pdatatowrite, u16 wordstowrite);
+
+void pruss_rmwl(struct device *dev, u32 offset, u32 mask, u32 val);
+
+void pruss_idx_writel(struct device *dev, u32 offset, u32 value);
+
+void pruss_writew(struct device *dev, u32 offset, u16 datatowrite);
+
+void pruss_rmww(struct device *dev, u32 offset, u16 mask, u16 val);
+
+void pruss_readw(struct device *dev, u32 offset, u16 *pdatatoread);
+
+#endif	/* End _PRUSS_H_ */
diff --git a/drivers/staging/pruss/pruss_core.h b/drivers/staging/pruss/pruss_core.h
new file mode 100644
index 0000000..8ecb0e5
--- /dev/null
+++ b/drivers/staging/pruss/pruss_core.h
@@ -0,0 +1,132 @@
+/*
+ * Copyright (C) 2010, 2011 Texas Instruments Incorporated
+ * Author: Jitendra Kumar <jitendra@...tralsolutions.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.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
+ * whether express or implied; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#ifndef _PRUSS_CORE_H_
+#define _PRUSS_CORE_H_
+
+#include <linux/types.h>
+
+#define PRUCORE_0		(0)
+#define PRUCORE_1		(1)
+
+#define PRUCORE_CONTROL_PCRESETVAL_MASK			(0xFFFF0000u)
+#define PRUCORE_CONTROL_PCRESETVAL_SHIFT		(0x00000010u)
+#define PRUCORE_CONTROL_PCRESETVAL_RESETVAL		(0x00000000u)
+#define PRUCORE_CONTROL_RUNSTATE_MASK			(0x00008000u)
+#define PRUCORE_CONTROL_RUNSTATE_SHIFT			(0x0000000Fu)
+#define PRUCORE_CONTROL_RUNSTATE_RESETVAL		(0x00000000u)
+#define PRUCORE_CONTROL_RUNSTATE_HALT			(0x00000000u)
+#define PRUCORE_CONTROL_RUNSTATE_RUN			(0x00000001u)
+#define PRUCORE_CONTROL_SINGLESTEP_MASK			(0x00000100u)
+#define PRUCORE_CONTROL_SINGLESTEP_SHIFT		(0x00000008u)
+#define PRUCORE_CONTROL_SINGLESTEP_RESETVAL		(0x00000000u)
+#define PRUCORE_CONTROL_SINGLESTEP_FREERUN		(0x00000000u)
+#define PRUCORE_CONTROL_SINGLESTEP_SINGLE		(0x00000001u)
+#define PRUCORE_CONTROL_COUNTENABLE_MASK		(0x00000008u)
+#define PRUCORE_CONTROL_COUNTENABLE_SHIFT		(0x00000003u)
+#define PRUCORE_CONTROL_COUNTENABLE_RESETVAL		(0x00000000u)
+#define PRUCORE_CONTROL_COUNTENABLE_DISABLE		(0x00000000u)
+#define PRUCORE_CONTROL_COUNTENABLE_ENABLE		(0x00000001u)
+#define PRUCORE_CONTROL_SLEEPING_MASK			(0x00000004u)
+#define PRUCORE_CONTROL_SLEEPING_SHIFT			(0x00000002u)
+#define PRUCORE_CONTROL_SLEEPING_RESETVAL		(0x00000000u)
+#define PRUCORE_CONTROL_SLEEPING_NOTASLEEP		(0x00000000u)
+#define PRUCORE_CONTROL_SLEEPING_ASLEEP			(0x00000001u)
+#define PRUCORE_CONTROL_ENABLE_MASK			(0x00000002u)
+#define PRUCORE_CONTROL_ENABLE_SHIFT			(0x00000001u)
+#define PRUCORE_CONTROL_ENABLE_RESETVAL			(0x00000000u)
+#define PRUCORE_CONTROL_ENABLE_DISABLE			(0x00000000u)
+#define PRUCORE_CONTROL_ENABLE_ENABLE			(0x00000001u)
+#define PRUCORE_CONTROL_SOFTRESET_MASK			(0x00000001u)
+#define PRUCORE_CONTROL_SOFTRESET_SHIFT			(0x00000000u)
+#define PRUCORE_CONTROL_SOFTRESET_RESETVAL		(0x00000000u)
+#define PRUCORE_CONTROL_SOFTRESET_RESET			(0x00000000u)
+#define PRUCORE_CONTROL_SOFTRESET_OUT_OF_RESET		(0x00000001u)
+#define PRUCORE_CONTROL_RESETVAL			(0x00000000u)
+
+struct prusscore_regs {
+	u32 control;
+	u32 status;
+	u32 wakeup;
+	u32 cyclecnt;
+	u32 stallcnt;
+	u8  rsvd0[12];
+	u32 contabblkidx0;
+	u32 contabblkidx1;
+	u32 contabproptr0;
+	u32 contabproptr1;
+	u8  rsvd1[976];
+	u32 intgpr[32];
+	u32 intcter[32];
+	u8  rsvd2[768];
+};
+
+struct pruss_intc_regs {
+	u32 revid;
+	u32 control;
+	u8  res1[8];
+	u32 glblen;
+	u8  res2[8];
+	u32 glblnstlvl;
+	u32 statidxset;
+	u32 statidxclr;
+	u32 enidxset;
+	u32 enidxclr;
+	u8  res3[4];
+	u32 hostintenidxset;
+	u32 hostintenidxclr;
+	u8  res4[68];
+	u32 glblpriidx;
+	u8  res5[380];
+	u32 statsetint[2];
+	u8  res6[120];
+	u32 statclrint[2];
+	u8  res7[120];
+	u32 enableset[2];
+	u8  res8[120];
+	u32 enableclr[2];
+	u8  res9[120];
+	u32 chanmap[16];
+	u8  res10[960];
+	u32 hostmap[2];
+	u8  res11[248];
+	u32 hostintpriidx[10];
+	u8  res12[984];
+	u32 polarity[2];
+	u8  res13[120];
+	u32 type[2];
+	u8  res14[888];
+	u32 hostintnstlvl[10];
+	u8  res15[984];
+	u32 hostinten;
+	u8  res16[6907];
+};
+
+struct pruss_dram {
+	u8 dram_dt[512];
+	u8 res[7680];
+};
+
+struct pruss_iram {
+	u8 iram_dt[4096];
+	u8 res[12288];
+};
+
+struct pruss_map {
+	struct pruss_dram dram[2];
+	struct pruss_intc_regs intc;
+	struct prusscore_regs core[2];
+	struct pruss_iram iram[2];
+};
+#endif
-- 
1.7.2.3

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