Release 4.11 arch/arm/mach-omap1/ocpi.c

/*
 * linux/arch/arm/plat-omap/ocpi.c
 *
 * Minimal OCP bus support for omap16xx
 *
 * Copyright (C) 2003 - 2005 Nokia Corporation
 * Copyright (C) 2012 Texas Instruments, Inc.
 * Written by Tony Lindgren <tony@atomide.com>
 *
 * Modified for clock framework by Paul Mundt <paul.mundt@nokia.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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/err.h>
#include <linux/clk.h>
#include <linux/io.h>

#include <mach/hardware.h>

#include "common.h"


#define OCPI_BASE		0xfffec320

#define OCPI_FAULT		(OCPI_BASE + 0x00)

#define OCPI_CMD_FAULT		(OCPI_BASE + 0x04)

#define OCPI_SINT0		(OCPI_BASE + 0x08)

#define OCPI_TABORT		(OCPI_BASE + 0x0c)

#define OCPI_SINT1		(OCPI_BASE + 0x10)

#define OCPI_PROT		(OCPI_BASE + 0x14)

#define OCPI_SEC		(OCPI_BASE + 0x18)

/* USB OHCI OCPI access error registers */

#define HOSTUEADDR	0xfffba0e0

#define HOSTUESTATUS	0xfffba0e4


static struct clk *ocpi_ck;

/*
 * Enables device access to OMAP buses via the OCPI bridge
 */


int ocpi_enable(void)
{
	unsigned int val;

	if (!cpu_is_omap16xx())
		return -ENODEV;

	/* Enable access for OHCI in OCPI */
	val = omap_readl(OCPI_PROT);
	val &= ~0xff;
	/* val &= (1 << 0);      Allow access only to EMIFS */
	omap_writel(val, OCPI_PROT);

	val = omap_readl(OCPI_SEC);
	val &= ~0xff;
	omap_writel(val, OCPI_SEC);

	return 0;
}
Contributors
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Tony Lindgren
63
98.44%
1
50.00%
Paul Walmsley
1
1.56%
1
50.00%
Total
64
100.00%
2
100.00%


EXPORT_SYMBOL(ocpi_enable);



static int __init omap_ocpi_init(void)
{
	if (!cpu_is_omap16xx())
		return -ENODEV;

	ocpi_ck = clk_get(NULL, "l3_ocpi_ck");
	if (IS_ERR(ocpi_ck))
		return PTR_ERR(ocpi_ck);

	clk_enable(ocpi_ck);
	ocpi_enable();
	pr_info("OMAP OCPI interconnect driver loaded\n");

	return 0;
}

Contributors
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CommitProp
Tony Lindgren
56
98.25%
2
66.67%
Paul Walmsley
1
1.75%
1
33.33%
Total
57
100.00%
3
100.00%



static void __exit omap_ocpi_exit(void)
{
	/* REVISIT: Disable OCPI */

	if (!cpu_is_omap16xx())
		return;

	clk_disable(ocpi_ck);
	clk_put(ocpi_ck);
}

Contributors
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CommitProp
Tony Lindgren
27
100.00%
2
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27
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100.00%

MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
MODULE_DESCRIPTION("OMAP OCPI bus controller module");
MODULE_LICENSE("GPL");

module_init(omap_ocpi_init);

module_exit(omap_ocpi_exit);
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Tony Lindgren
250
96.15%
2
28.57%
Paul Walmsley
6
2.31%
1
14.29%
Russell King
3
1.15%
3
42.86%
Nicholas Krause
1
0.38%
1
14.29%
Total
260
100.00%
7
100.00%
Directory: arch/arm/mach-omap1

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