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 <mach/hardware.h>
29 #include <asm/mach/map.h>
30 #include <mach/iomux-v3.h>
31
32 static void __iomem *base;
33
34 /*
35 * configures a single pad in the iomuxer
36 */
mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)37 int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad)
38 {
39 u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT;
40 u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT;
41 u32 sel_input_ofs = (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT;
42 u32 sel_input = (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT;
43 u32 pad_ctrl_ofs = (pad & MUX_PAD_CTRL_OFS_MASK) >> MUX_PAD_CTRL_OFS_SHIFT;
44 u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT;
45
46 if (mux_ctrl_ofs)
47 __raw_writel(mux_mode, base + mux_ctrl_ofs);
48
49 if (sel_input_ofs)
50 __raw_writel(sel_input, base + sel_input_ofs);
51
52 if (!(pad_ctrl & NO_PAD_CTRL) && pad_ctrl_ofs)
53 __raw_writel(pad_ctrl, base + pad_ctrl_ofs);
54
55 return 0;
56 }
57 EXPORT_SYMBOL(mxc_iomux_v3_setup_pad);
58
mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t * pad_list,unsigned count)59 int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count)
60 {
61 iomux_v3_cfg_t *p = pad_list;
62 int i;
63 int ret;
64
65 for (i = 0; i < count; i++) {
66 ret = mxc_iomux_v3_setup_pad(*p);
67 if (ret)
68 return ret;
69 p++;
70 }
71 return 0;
72 }
73 EXPORT_SYMBOL(mxc_iomux_v3_setup_multiple_pads);
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