Message-ID: <4DB1A603.2090208@pengutronix.de>
Date:	Fri, 22 Apr 2011 18:00:03 +0200
From:	Marc Kleine-Budde <mkl@...gutronix.de>
To:	Subhasish Ghosh <subhasish@...tralsolutions.com>
CC:	davinci-linux-open-source@...ux.davincidsp.com,
	sachi@...tralsolutions.com, Samuel Ortiz <sameo@...ux.intel.com>,
	nsekhar@...com, open list <linux-kernel@...r.kernel.org>,
	m-watkins@...com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 01/11] mfd: add pruss mfd driver.

On 04/22/2011 02:08 PM, Subhasish Ghosh wrote:
> 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/mfd/Kconfig            |   10 +
>  drivers/mfd/Makefile           |    1 +
>  drivers/mfd/pruss.c            |  513 ++++++++++++++++++++++++++++++++++++++++
>  include/linux/mfd/pruss.h      |  130 ++++++++++
>  include/linux/mfd/pruss_core.h |  128 ++++++++++
>  5 files changed, 782 insertions(+), 0 deletions(-)
>  create mode 100644 drivers/mfd/pruss.c
>  create mode 100644 include/linux/mfd/pruss.h
>  create mode 100644 include/linux/mfd/pruss_core.h
> 
> diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
> index 0284c53..41479e4 100644
> --- a/drivers/mfd/Kconfig
> +++ b/drivers/mfd/Kconfig
> @@ -92,6 +92,16 @@ config MFD_TI_SSP
>  	  To compile this driver as a module, choose M here: the
>  	  module will be called ti-ssp.
>  
> +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.
> +
>  config HTC_EGPIO
>  	bool "HTC EGPIO support"
>  	depends on GENERIC_HARDIRQS && GPIOLIB && ARM
> diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
> index c56b6c7..8015dea 100644
> --- a/drivers/mfd/Makefile
> +++ b/drivers/mfd/Makefile
> @@ -13,6 +13,7 @@ obj-$(CONFIG_HTC_PASIC3)	+= htc-pasic3.o
>  obj-$(CONFIG_HTC_I2CPLD)	+= htc-i2cpld.o
>  
>  obj-$(CONFIG_MFD_DAVINCI_VOICECODEC)	+= davinci_voicecodec.o
> +obj-$(CONFIG_MFD_DA8XX_PRUSS)	+= pruss.o
>  obj-$(CONFIG_MFD_DM355EVM_MSP)	+= dm355evm_msp.o
>  obj-$(CONFIG_MFD_TI_SSP)	+= ti-ssp.o
>  
> diff --git a/drivers/mfd/pruss.c b/drivers/mfd/pruss.c
> new file mode 100644
> index 0000000..6836d5a
> --- /dev/null
> +++ b/drivers/mfd/pruss.c
> @@ -0,0 +1,513 @@
> +/*
> + * 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 <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;
> +};
> +
> +s32 pruss_disable(struct device *dev, u8 pruss_num)
make it a int function
> +{
> +	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;

make it a void function?
> +}
> +EXPORT_SYMBOL_GPL(pruss_disable);
> +
> +s32 pruss_enable(struct device *dev, u8 pruss_num)
int?
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	struct prusscore_regs __iomem *h_pruss;
> +	struct pruss_map __iomem *pruss_mmap = pruss->ioaddr;
> +	u32 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);

no need to lock the ram reset below?


> +	spin_unlock(&pruss->lock);
> +
> +	/* Reset any garbage in the ram */
> +	if (pruss_num == PRUCORE_0)
> +		for (i = 0; i < PRUSS_PRU0_RAM_SZ; i++)
> +			iowrite32(0x0, &pruss_mmap->dram0[i]);
> +	else if (pruss_num == PRUCORE_1)
> +		for (i = 0; i < PRUSS_PRU1_RAM_SZ; i++)
> +			iowrite32(0x0, &pruss_mmap->dram1[i]);

if you make a array for these

+struct pruss_map {
+	u8 dram0[512];
+	u8 res1[7680];

+	u8 dram1[512];
+	u8 res2[7680];
..}

you don't need the if..else..

> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_enable);
> +
> +/* Load the specified PRU with code */
> +s32 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;
> +	u32 i;
> +
> +	if (pruss_num == PRUCORE_0)
> +		pruss_iram = (u32 __iomem *)&pruss_mmap->iram0;
> +	else if (pruss_num == PRUCORE_1)
> +		pruss_iram = (u32 __iomem *)&pruss_mmap->iram1;
> +	else

same here
> +		return -EINVAL;
> +
> +	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);
> +
> +s32 pruss_run(struct device *dev, u8 pruss_num)
int?
> +{
> +	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);
> +
> +s32 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;

how long might this take? what about some delay, sleep, or reschedule?

> +	}
> +	if (!cnt)
> +		return -EBUSY;
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_wait_for_halt);
> +
> +s32 pruss_writeb(struct device *dev, u32 offset, u8 pdatatowrite)
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddresstowrite;

we usually don't use "p" variable names for pointers

> +
> +	paddresstowrite = pruss->ioaddr + offset;
> +	iowrite8(pdatatowrite, paddresstowrite);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_writeb);
> +
> +s32 pruss_rmwb(struct device *dev, u32 offset, u8 mask, u8 val)
void function?
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddress;
> +	u32 preg_data;
> +
> +	paddress = pruss->ioaddr + offset;
> +
> +	spin_lock(&pruss->lock);
> +	preg_data = ioread8(paddress);
> +	preg_data &= ~mask;
> +	preg_data |= val;
> +	iowrite8(preg_data, paddress);
> +	spin_unlock(&pruss->lock);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_rmwb);
> +
> +s32 pruss_readb(struct device *dev, u32 offset, u8 *pdatatoread)
void?
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddresstoread;
> +
> +	paddresstoread = pruss->ioaddr + offset ;
> +	*pdatatoread = ioread8(paddresstoread);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_readb);
> +
> +s32 pruss_readb_multi(struct device *dev, u32 offset,
> +		u8 *pdatatoread, u16 bytestoread)
viod?
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	u8 __iomem *paddresstoread;
> +	u16 i;
int?
> +
> +	paddresstoread = pruss->ioaddr + offset;
> +
> +	for (i = 0; i < bytestoread; i++)
> +		*pdatatoread++ = ioread8(paddresstoread++);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_readb_multi);
> +
> +s32 pruss_writel(struct device *dev, u32 offset,
> +		u32 pdatatowrite)
void?
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddresstowrite;
> +
> +	paddresstowrite = pruss->ioaddr + offset;
> +	iowrite32(pdatatowrite, paddresstowrite);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_writel);
> +
> +s32 pruss_writel_multi(struct device *dev, u32 offset,
> +		u32 *pdatatowrite, u16 wordstowrite)
void?
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	u32 __iomem *paddresstowrite;
> +	u16 i;
> +
> +	paddresstowrite = pruss->ioaddr + offset;
> +
> +	for (i = 0; i < wordstowrite; i++)
> +		iowrite32(*pdatatowrite++, paddresstowrite++);
memcopy_to_iomem?
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_writel_multi);
> +
> +s32 pruss_rmwl(struct device *dev, u32 offset, u32 mask, u32 val)
void?
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddress;
> +	u32 preg_data;
> +
> +	paddress = pruss->ioaddr + offset;
> +
> +	spin_lock(&pruss->lock);
> +	preg_data = ioread32(paddress);
> +	preg_data &= ~mask;
> +	preg_data |= val;
> +	iowrite32(preg_data, paddress);
> +	spin_unlock(&pruss->lock);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_rmwl);
> +
> +s32 pruss_readl(struct device *dev, u32 offset, u32 *pdatatoread)
void? or return the read value
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddresstoread;
> +
> +	paddresstoread = pruss->ioaddr + offset;
> +	*pdatatoread = ioread32(paddresstoread);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_readl);
> +
> +s32 pruss_readl_multi(struct device *dev, u32 offset,
> +		u32 *pdatatoread, u16 wordstoread)
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	u32 __iomem *paddresstoread;
> +	u16 i;
> +
> +	paddresstoread = pruss->ioaddr + offset;
> +	for (i = 0; i < wordstoread; i++)
> +		*pdatatoread++ = ioread32(paddresstoread++);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_readl_multi);
> +
> +s32 pruss_writew(struct device *dev, u32 offset, u16 pdatatowrite)
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddresstowrite;
> +
> +	paddresstowrite = pruss->ioaddr + offset;
> +	iowrite16(pdatatowrite, paddresstowrite);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_writew);
> +
> +s32 pruss_rmww(struct device *dev, u32 offset, u16 mask, u16 val)
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddress;
> +	u32 preg_data;
> +
> +	paddress = pruss->ioaddr + offset;
> +
> +	spin_lock(&pruss->lock);
> +	preg_data = ioread16(paddress);
> +	preg_data &= ~mask;
> +	preg_data |= val;
> +	iowrite16(preg_data, paddress);
> +	spin_unlock(&pruss->lock);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_rmww);
> +
> +s32 pruss_readw(struct device *dev, u32 offset, u16 *pdatatoread)
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddresstoread;
> +
> +	paddresstoread = pruss->ioaddr + offset;
> +	*pdatatoread = ioread16(paddresstoread);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(pruss_readw);
> +
> +s32 pruss_idx_writel(struct device *dev, u32 offset, u32 value)
> +{
> +	struct pruss_priv *pruss = dev_get_drvdata(dev->parent);
> +	void __iomem *paddresstowrite;
> +
> +	paddresstowrite = pruss->ioaddr + offset;
> +	iowrite32(value, paddresstowrite);
> +
> +	return 0;
> +}
> +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, i, num_devices = 0;
> +
> +	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/include/linux/mfd/pruss.h b/include/linux/mfd/pruss.h
> new file mode 100644
> index 0000000..8ef25b3
> --- /dev/null
> +++ b/include/linux/mfd/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)
> +
> +s32 pruss_enable(struct device *dev, u8 pruss_num);
> +
> +s32 pruss_load(struct device *dev, u8 pruss_num,
> +	u32 *pruss_code, u32 code_size_in_words);
> +
> +s32 pruss_run(struct device *dev, u8 pruss_num);
> +
> +s32 pruss_wait_for_halt(struct device *dev, u8 pruss_num, u32 timeout);
> +
> +s32 pruss_disable(struct device *dev, u8 pruss_num);
> +
> +s32 pruss_writeb(struct device *dev, u32 offset, u8 pdatatowrite);
> +
> +s32 pruss_rmwb(struct device *dev, u32 offset, u8 mask, u8 val);
> +
> +s32 pruss_readb(struct device *dev, u32 offset, u8 *pdatatoread);
> +
> +s32 pruss_readb_multi(struct device *dev, u32 offset,
> +		u8 *pdatatoread, u16 bytestoread);
> +
> +s32 pruss_readl(struct device *dev, u32 offset, u32 *pdatatoread);
> +
> +s32 pruss_readl_multi(struct device *dev, u32 offset,
> +		u32 *pdatatoread, u16 wordstoread);
> +
> +s32 pruss_writel(struct device *dev, u32 offset, u32 pdatatowrite);
> +
> +s32 pruss_writel_multi(struct device *dev, u32 offset,
> +		u32 *pdatatowrite, u16 wordstowrite);
> +
> +s32 pruss_rmwl(struct device *dev, u32 offset, u32 mask, u32 val);
> +
> +s32 pruss_idx_writel(struct device *dev, u32 offset, u32 value);
> +
> +s32 pruss_writew(struct device *dev, u32 offset, u16 datatowrite);
> +
> +s32 pruss_rmww(struct device *dev, u32 offset, u16 mask, u16 val);
> +
> +s32 pruss_readw(struct device *dev, u32 offset, u16 *pdatatoread);
> +
> +#endif	/* End _PRUSS_H_ */
> diff --git a/include/linux/mfd/pruss_core.h b/include/linux/mfd/pruss_core.h
> new file mode 100644
> index 0000000..48e2b99
> --- /dev/null
> +++ b/include/linux/mfd/pruss_core.h
> @@ -0,0 +1,128 @@
> +/*
> + * 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_map {
> +	u8 dram0[512];
> +	u8 res1[7680];
> +	u8 dram1[512];
> +	u8 res2[7680];
> +	struct pruss_intc_regs intc;
> +	struct prusscore_regs core[2];
> +	u8 iram0[4096];
> +	u8 res3[12288];
> +	u8 iram1[4096];
> +	u8 res4[12288];
> +};
> +#endif

regards, Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
Industrial Linux Solutions        | Phone: +49-231-2826-924     |
Vertretung West/Dortmund          | Fax:   +49-5121-206917-5555 |
Amtsgericht Hildesheim, HRA 2686  | http://www.pengutronix.de   |


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