1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
115 lines
2.8 KiB
C
115 lines
2.8 KiB
C
/*
|
|
* linux/arch/arm/mach-omap/ocpi.c
|
|
*
|
|
* Minimal OCP bus support for omap16xx
|
|
*
|
|
* Copyright (C) 2003 - 2005 Nokia Corporation
|
|
* 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/config.h>
|
|
#include <linux/module.h>
|
|
#include <linux/version.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 <asm/io.h>
|
|
#include <asm/hardware/clock.h>
|
|
#include <asm/arch/hardware.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
|
|
* FIXME: Add locking
|
|
*/
|
|
int ocpi_enable(void)
|
|
{
|
|
unsigned int val;
|
|
|
|
if (!cpu_is_omap16xx())
|
|
return -ENODEV;
|
|
|
|
/* Make sure there's clock for OCPI */
|
|
clk_enable(ocpi_ck);
|
|
|
|
/* 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;
|
|
}
|
|
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_use(ocpi_ck);
|
|
ocpi_enable();
|
|
printk("OMAP OCPI interconnect driver loaded\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit omap_ocpi_exit(void)
|
|
{
|
|
/* REVISIT: Disable OCPI */
|
|
|
|
if (!cpu_is_omap16xx())
|
|
return;
|
|
|
|
clk_unuse(ocpi_ck);
|
|
clk_put(ocpi_ck);
|
|
}
|
|
|
|
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);
|