1 /*
2 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
3 * <armlinux@phytec.de>
4 * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
18 * MA 02110-1301, USA.
19 */
20
21 #ifndef __MACH_MXS_IOMUX_H__
22 #define __MACH_MXS_IOMUX_H__
23
24 /*
25 * IOMUX/PAD Bit field definitions
26 *
27 * PAD_BANK: 0..2 (3)
28 * PAD_PIN: 3..7 (5)
29 * PAD_MUXSEL: 8..9 (2)
30 * PAD_MA: 10..11 (2)
31 * PAD_MA_VALID: 12 (1)
32 * PAD_VOL: 13 (1)
33 * PAD_VOL_VALID: 14 (1)
34 * PAD_PULL: 15 (1)
35 * PAD_PULL_VALID: 16 (1)
36 * RESERVED: 17..31 (15)
37 */
38 typedef u32 iomux_cfg_t;
39
40 #define MXS_PAD_BANK_SHIFT 0
41 #define MXS_PAD_BANK_MASK ((iomux_cfg_t)0x7 << MXS_PAD_BANK_SHIFT)
42 #define MXS_PAD_PIN_SHIFT 3
43 #define MXS_PAD_PIN_MASK ((iomux_cfg_t)0x1f << MXS_PAD_PIN_SHIFT)
44 #define MXS_PAD_MUXSEL_SHIFT 8
45 #define MXS_PAD_MUXSEL_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MUXSEL_SHIFT)
46 #define MXS_PAD_MA_SHIFT 10
47 #define MXS_PAD_MA_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MA_SHIFT)
48 #define MXS_PAD_MA_VALID_SHIFT 12
49 #define MXS_PAD_MA_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_MA_VALID_SHIFT)
50 #define MXS_PAD_VOL_SHIFT 13
51 #define MXS_PAD_VOL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_SHIFT)
52 #define MXS_PAD_VOL_VALID_SHIFT 14
53 #define MXS_PAD_VOL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_VALID_SHIFT)
54 #define MXS_PAD_PULL_SHIFT 15
55 #define MXS_PAD_PULL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_SHIFT)
56 #define MXS_PAD_PULL_VALID_SHIFT 16
57 #define MXS_PAD_PULL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_VALID_SHIFT)
58
59 #define PAD_MUXSEL_0 0
60 #define PAD_MUXSEL_1 1
61 #define PAD_MUXSEL_2 2
62 #define PAD_MUXSEL_GPIO 3
63
64 #define PAD_4MA 0
65 #define PAD_8MA 1
66 #define PAD_12MA 2
67 #define PAD_16MA 3
68
69 #define PAD_1V8 0
70 #define PAD_3V3 1
71
72 #define PAD_NOPULL 0
73 #define PAD_PULLUP 1
74
75 #define MXS_PAD_4MA ((PAD_4MA << MXS_PAD_MA_SHIFT) | \
76 MXS_PAD_MA_VALID_MASK)
77 #define MXS_PAD_8MA ((PAD_8MA << MXS_PAD_MA_SHIFT) | \
78 MXS_PAD_MA_VALID_MASK)
79 #define MXS_PAD_12MA ((PAD_12MA << MXS_PAD_MA_SHIFT) | \
80 MXS_PAD_MA_VALID_MASK)
81 #define MXS_PAD_16MA ((PAD_16MA << MXS_PAD_MA_SHIFT) | \
82 MXS_PAD_MA_VALID_MASK)
83
84 #define MXS_PAD_1V8 ((PAD_1V8 << MXS_PAD_VOL_SHIFT) | \
85 MXS_PAD_VOL_VALID_MASK)
86 #define MXS_PAD_3V3 ((PAD_3V3 << MXS_PAD_VOL_SHIFT) | \
87 MXS_PAD_VOL_VALID_MASK)
88
89 #define MXS_PAD_NOPULL ((PAD_NOPULL << MXS_PAD_PULL_SHIFT) | \
90 MXS_PAD_PULL_VALID_MASK)
91 #define MXS_PAD_PULLUP ((PAD_PULLUP << MXS_PAD_PULL_SHIFT) | \
92 MXS_PAD_PULL_VALID_MASK)
93
94 /* generic pad control used in most cases */
95 #define MXS_PAD_CTRL (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL)
96
97 #define MXS_IOMUX_PAD(_bank, _pin, _muxsel, _ma, _vol, _pull) \
98 (((iomux_cfg_t)(_bank) << MXS_PAD_BANK_SHIFT) | \
99 ((iomux_cfg_t)(_pin) << MXS_PAD_PIN_SHIFT) | \
100 ((iomux_cfg_t)(_muxsel) << MXS_PAD_MUXSEL_SHIFT) | \
101 ((iomux_cfg_t)(_ma) << MXS_PAD_MA_SHIFT) | \
102 ((iomux_cfg_t)(_vol) << MXS_PAD_VOL_SHIFT) | \
103 ((iomux_cfg_t)(_pull) << MXS_PAD_PULL_SHIFT))
104
105 /*
106 * A pad becomes naked, when none of mA, vol or pull
107 * validity bits is set.
108 */
109 #define MXS_IOMUX_PAD_NAKED(_bank, _pin, _muxsel) \
110 MXS_IOMUX_PAD(_bank, _pin, _muxsel, 0, 0, 0)
111
PAD_BANK(iomux_cfg_t pad)112 static inline unsigned int PAD_BANK(iomux_cfg_t pad)
113 {
114 return (pad & MXS_PAD_BANK_MASK) >> MXS_PAD_BANK_SHIFT;
115 }
116
PAD_PIN(iomux_cfg_t pad)117 static inline unsigned int PAD_PIN(iomux_cfg_t pad)
118 {
119 return (pad & MXS_PAD_PIN_MASK) >> MXS_PAD_PIN_SHIFT;
120 }
121
PAD_MUXSEL(iomux_cfg_t pad)122 static inline unsigned int PAD_MUXSEL(iomux_cfg_t pad)
123 {
124 return (pad & MXS_PAD_MUXSEL_MASK) >> MXS_PAD_MUXSEL_SHIFT;
125 }
126
PAD_MA(iomux_cfg_t pad)127 static inline unsigned int PAD_MA(iomux_cfg_t pad)
128 {
129 return (pad & MXS_PAD_MA_MASK) >> MXS_PAD_MA_SHIFT;
130 }
131
PAD_MA_VALID(iomux_cfg_t pad)132 static inline unsigned int PAD_MA_VALID(iomux_cfg_t pad)
133 {
134 return (pad & MXS_PAD_MA_VALID_MASK) >> MXS_PAD_MA_VALID_SHIFT;
135 }
136
PAD_VOL(iomux_cfg_t pad)137 static inline unsigned int PAD_VOL(iomux_cfg_t pad)
138 {
139 return (pad & MXS_PAD_VOL_MASK) >> MXS_PAD_VOL_SHIFT;
140 }
141
PAD_VOL_VALID(iomux_cfg_t pad)142 static inline unsigned int PAD_VOL_VALID(iomux_cfg_t pad)
143 {
144 return (pad & MXS_PAD_VOL_VALID_MASK) >> MXS_PAD_VOL_VALID_SHIFT;
145 }
146
PAD_PULL(iomux_cfg_t pad)147 static inline unsigned int PAD_PULL(iomux_cfg_t pad)
148 {
149 return (pad & MXS_PAD_PULL_MASK) >> MXS_PAD_PULL_SHIFT;
150 }
151
PAD_PULL_VALID(iomux_cfg_t pad)152 static inline unsigned int PAD_PULL_VALID(iomux_cfg_t pad)
153 {
154 return (pad & MXS_PAD_PULL_VALID_MASK) >> MXS_PAD_PULL_VALID_SHIFT;
155 }
156
157 /*
158 * configures a single pad in the iomuxer
159 */
160 int mxs_iomux_setup_pad(iomux_cfg_t pad);
161
162 /*
163 * configures multiple pads
164 * convenient way to call the above function with tables
165 */
166 int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count);
167
168 #endif /* __MACH_MXS_IOMUX_H__*/
169