1 /*
2 * Copyright 2004-2006 Freescale Semiconductor, Inc. All Rights Reserved.
3 * Copyright (C) 2008 by Sascha Hauer <kernel@pengutronix.de>
4 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
5 * <armlinux@phytec.de>
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
19 * MA 02110-1301, USA.
20 */
21 #include <linux/errno.h>
22 #include <linux/init.h>
23 #include <linux/kernel.h>
24 #include <linux/module.h>
25 #include <linux/string.h>
26 #include <linux/gpio.h>
27
28 #include <asm/mach/map.h>
29
30 #include "hardware.h"
31 #include "iomux-v3.h"
32
33 static void __iomem *base;
34
35 /*
36 * configures a single pad in the iomuxer
37 */
mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)38 int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
39 {
40 u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
41 u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
42 u32 sel_input_ofs = (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
43 u32 sel_input = (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
44 u32 pad_ctrl_ofs = (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
45 u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
46
47 if (mux_ctrl_ofs)
48 __raw_writel(mux_mode, base + mux_ctrl_ofs);
49
50 if (sel_input_ofs)
51 __raw_writel(sel_input, base + sel_input_ofs);
52
53 if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
54 __raw_writel(pad_ctrl, base + pad_ctrl_ofs);
55
56 return 0;
57 }
58
mxc_iomux_v3_setup_multiple_pads(const iomux_v3_cfg_t * pad_list,unsigned count)59 int mxc_iomux_v3_setup_multiple_pads(const iomux_v3_cfg_t *pad_list,
60 unsigned count)
61 {
62 const iomux_v3_cfg_t *p = pad_list;
63 int i;
64 int ret;
65
66 for (i = 0; i < count; i++) {
67 ret = mxc_iomux_v3_setup_pad(*p);
68 if (ret)
69 return ret;
70 p++;
71 }
72 return 0;
73 }
74
mxc_iomux_v3_init(void __iomem * iomux_v3_base)75 void mxc_iomux_v3_init(void __iomem *iomux_v3_base)
76 {
77 base = iomux_v3_base;
78 }
79