2 * linux/arch/arm/plat-omap/ocpi.c
4 * Minimal OCP bus support for omap16xx
6 * Copyright (C) 2003 - 2005 Nokia Corporation
7 * Written by Tony Lindgren <tony@atomide.com>
9 * Modified for clock framework by Paul Mundt <paul.mundt@nokia.com>.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
26 #include <linux/config.h>
27 #include <linux/module.h>
28 #include <linux/types.h>
29 #include <linux/errno.h>
30 #include <linux/kernel.h>
31 #include <linux/init.h>
32 #include <linux/spinlock.h>
33 #include <linux/err.h>
36 #include <asm/hardware/clock.h>
37 #include <asm/hardware.h>
39 #define OCPI_BASE 0xfffec320
40 #define OCPI_FAULT (OCPI_BASE + 0x00)
41 #define OCPI_CMD_FAULT (OCPI_BASE + 0x04)
42 #define OCPI_SINT0 (OCPI_BASE + 0x08)
43 #define OCPI_TABORT (OCPI_BASE + 0x0c)
44 #define OCPI_SINT1 (OCPI_BASE + 0x10)
45 #define OCPI_PROT (OCPI_BASE + 0x14)
46 #define OCPI_SEC (OCPI_BASE + 0x18)
48 /* USB OHCI OCPI access error registers */
49 #define HOSTUEADDR 0xfffba0e0
50 #define HOSTUESTATUS 0xfffba0e4
52 static struct clk *ocpi_ck;
55 * Enables device access to OMAP buses via the OCPI bridge
62 if (!cpu_is_omap16xx())
65 /* Make sure there's clock for OCPI */
68 /* Enable access for OHCI in OCPI */
69 val = omap_readl(OCPI_PROT);
71 //val &= (1 << 0); /* Allow access only to EMIFS */
72 omap_writel(val, OCPI_PROT);
74 val = omap_readl(OCPI_SEC);
76 omap_writel(val, OCPI_SEC);
80 EXPORT_SYMBOL(ocpi_enable);
82 static int __init omap_ocpi_init(void)
84 if (!cpu_is_omap16xx())
87 ocpi_ck = clk_get(NULL, "l3_ocpi_ck");
89 return PTR_ERR(ocpi_ck);
93 printk("OMAP OCPI interconnect driver loaded\n");
98 static void __exit omap_ocpi_exit(void)
100 /* REVISIT: Disable OCPI */
102 if (!cpu_is_omap16xx())
109 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
110 MODULE_DESCRIPTION("OMAP OCPI bus controller module");
111 MODULE_LICENSE("GPL");
112 module_init(omap_ocpi_init);
113 module_exit(omap_ocpi_exit);