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1/*
2 * linux/arch/arm/plat-omap/ocpi.c
3 *
4 * Minimal OCP bus support for omap16xx
5 *
6 * Copyright (C) 2003 - 2005 Nokia Corporation
7 * Copyright (C) 2012 Texas Instruments, Inc.
8 * Written by Tony Lindgren <tony@atomide.com>
9 *
10 * Modified for clock framework by Paul Mundt <paul.mundt@nokia.com>.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
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>
34#include <linux/clk.h>
35#include <linux/io.h>
36
37#include <mach/hardware.h>
38
39#include "common.h"
40
41#define OCPI_BASE 0xfffec320
42#define OCPI_FAULT (OCPI_BASE + 0x00)
43#define OCPI_CMD_FAULT (OCPI_BASE + 0x04)
44#define OCPI_SINT0 (OCPI_BASE + 0x08)
45#define OCPI_TABORT (OCPI_BASE + 0x0c)
46#define OCPI_SINT1 (OCPI_BASE + 0x10)
47#define OCPI_PROT (OCPI_BASE + 0x14)
48#define OCPI_SEC (OCPI_BASE + 0x18)
49
50/* USB OHCI OCPI access error registers */
51#define HOSTUEADDR 0xfffba0e0
52#define HOSTUESTATUS 0xfffba0e4
53
54static struct clk *ocpi_ck;
55
56/*
57 * Enables device access to OMAP buses via the OCPI bridge
58 * FIXME: Add locking
59 */
60int ocpi_enable(void)
61{
62 unsigned int val;
63
64 if (!cpu_is_omap16xx())
65 return -ENODEV;
66
67 /* Enable access for OHCI in OCPI */
68 val = omap_readl(OCPI_PROT);
69 val &= ~0xff;
70 /* val &= (1 << 0); Allow access only to EMIFS */
71 omap_writel(val, OCPI_PROT);
72
73 val = omap_readl(OCPI_SEC);
74 val &= ~0xff;
75 omap_writel(val, OCPI_SEC);
76
77 return 0;
78}
79EXPORT_SYMBOL(ocpi_enable);
80
81static int __init omap_ocpi_init(void)
82{
83 if (!cpu_is_omap16xx())
84 return -ENODEV;
85
86 ocpi_ck = clk_get(NULL, "l3_ocpi_ck");
87 if (IS_ERR(ocpi_ck))
88 return PTR_ERR(ocpi_ck);
89
90 clk_enable(ocpi_ck);
91 ocpi_enable();
92 pr_info("OMAP OCPI interconnect driver loaded\n");
93
94 return 0;
95}
96
97static void __exit omap_ocpi_exit(void)
98{
99 /* REVISIT: Disable OCPI */
100
101 if (!cpu_is_omap16xx())
102 return;
103
104 clk_disable(ocpi_ck);
105 clk_put(ocpi_ck);
106}
107
108MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
109MODULE_DESCRIPTION("OMAP OCPI bus controller module");
110MODULE_LICENSE("GPL");
111module_init(omap_ocpi_init);
112module_exit(omap_ocpi_exit);
1/*
2 * linux/arch/arm/plat-omap/ocpi.c
3 *
4 * Minimal OCP bus support for omap16xx
5 *
6 * Copyright (C) 2003 - 2005 Nokia Corporation
7 * Copyright (C) 2012 Texas Instruments, Inc.
8 * Written by Tony Lindgren <tony@atomide.com>
9 *
10 * Modified for clock framework by Paul Mundt <paul.mundt@nokia.com>.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 */
26
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>
34#include <linux/clk.h>
35#include <linux/io.h>
36
37#include <mach/hardware.h>
38
39#include "common.h"
40
41#define OCPI_BASE 0xfffec320
42#define OCPI_FAULT (OCPI_BASE + 0x00)
43#define OCPI_CMD_FAULT (OCPI_BASE + 0x04)
44#define OCPI_SINT0 (OCPI_BASE + 0x08)
45#define OCPI_TABORT (OCPI_BASE + 0x0c)
46#define OCPI_SINT1 (OCPI_BASE + 0x10)
47#define OCPI_PROT (OCPI_BASE + 0x14)
48#define OCPI_SEC (OCPI_BASE + 0x18)
49
50/* USB OHCI OCPI access error registers */
51#define HOSTUEADDR 0xfffba0e0
52#define HOSTUESTATUS 0xfffba0e4
53
54static struct clk *ocpi_ck;
55
56/*
57 * Enables device access to OMAP buses via the OCPI bridge
58 */
59int ocpi_enable(void)
60{
61 unsigned int val;
62
63 if (!cpu_is_omap16xx())
64 return -ENODEV;
65
66 /* Enable access for OHCI in OCPI */
67 val = omap_readl(OCPI_PROT);
68 val &= ~0xff;
69 /* val &= (1 << 0); Allow access only to EMIFS */
70 omap_writel(val, OCPI_PROT);
71
72 val = omap_readl(OCPI_SEC);
73 val &= ~0xff;
74 omap_writel(val, OCPI_SEC);
75
76 return 0;
77}
78EXPORT_SYMBOL(ocpi_enable);
79
80static int __init omap_ocpi_init(void)
81{
82 if (!cpu_is_omap16xx())
83 return -ENODEV;
84
85 ocpi_ck = clk_get(NULL, "l3_ocpi_ck");
86 if (IS_ERR(ocpi_ck))
87 return PTR_ERR(ocpi_ck);
88
89 clk_enable(ocpi_ck);
90 ocpi_enable();
91 pr_info("OMAP OCPI interconnect driver loaded\n");
92
93 return 0;
94}
95
96static void __exit omap_ocpi_exit(void)
97{
98 /* REVISIT: Disable OCPI */
99
100 if (!cpu_is_omap16xx())
101 return;
102
103 clk_disable(ocpi_ck);
104 clk_put(ocpi_ck);
105}
106
107MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>");
108MODULE_DESCRIPTION("OMAP OCPI bus controller module");
109MODULE_LICENSE("GPL");
110module_init(omap_ocpi_init);
111module_exit(omap_ocpi_exit);