1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
4 * <armlinux@phytec.de>
5 * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved.
6 */
7
8 #ifndef __MACH_MXS_IOMUX_H__
9 #define __MACH_MXS_IOMUX_H__
10
11 #ifndef __ASSEMBLY__
12
13 #include <asm/types.h>
14
15 /*
16 * IOMUX/PAD Bit field definitions
17 *
18 * PAD_BANK: 0..2 (3)
19 * PAD_PIN: 3..7 (5)
20 * PAD_MUXSEL: 8..9 (2)
21 * PAD_MA: 10..11 (2)
22 * PAD_MA_VALID: 12 (1)
23 * PAD_VOL: 13 (1)
24 * PAD_VOL_VALID: 14 (1)
25 * PAD_PULL: 15 (1)
26 * PAD_PULL_VALID: 16 (1)
27 * RESERVED: 17..31 (15)
28 */
29 typedef u32 iomux_cfg_t;
30
31 #define MXS_PAD_BANK_SHIFT 0
32 #define MXS_PAD_BANK_MASK ((iomux_cfg_t)0x7 << MXS_PAD_BANK_SHIFT)
33 #define MXS_PAD_PIN_SHIFT 3
34 #define MXS_PAD_PIN_MASK ((iomux_cfg_t)0x1f << MXS_PAD_PIN_SHIFT)
35 #define MXS_PAD_MUXSEL_SHIFT 8
36 #define MXS_PAD_MUXSEL_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MUXSEL_SHIFT)
37 #define MXS_PAD_MA_SHIFT 10
38 #define MXS_PAD_MA_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MA_SHIFT)
39 #define MXS_PAD_MA_VALID_SHIFT 12
40 #define MXS_PAD_MA_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_MA_VALID_SHIFT)
41 #define MXS_PAD_VOL_SHIFT 13
42 #define MXS_PAD_VOL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_SHIFT)
43 #define MXS_PAD_VOL_VALID_SHIFT 14
44 #define MXS_PAD_VOL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_VALID_SHIFT)
45 #define MXS_PAD_PULL_SHIFT 15
46 #define MXS_PAD_PULL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_SHIFT)
47 #define MXS_PAD_PULL_VALID_SHIFT 16
48 #define MXS_PAD_PULL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_VALID_SHIFT)
49
50 #define PAD_MUXSEL_0 0
51 #define PAD_MUXSEL_1 1
52 #define PAD_MUXSEL_2 2
53 #define PAD_MUXSEL_GPIO 3
54
55 #define PAD_4MA 0
56 #define PAD_8MA 1
57 #define PAD_12MA 2
58 #define PAD_16MA 3
59
60 #define PAD_1V8 0
61 #if defined(CONFIG_MX28)
62 #define PAD_3V3 1
63 #else
64 #define PAD_3V3 0
65 #endif
66
67 #define PAD_NOPULL 0
68 #define PAD_PULLUP 1
69
70 #define MXS_PAD_4MA ((PAD_4MA << MXS_PAD_MA_SHIFT) | \
71 MXS_PAD_MA_VALID_MASK)
72 #define MXS_PAD_8MA ((PAD_8MA << MXS_PAD_MA_SHIFT) | \
73 MXS_PAD_MA_VALID_MASK)
74 #define MXS_PAD_12MA ((PAD_12MA << MXS_PAD_MA_SHIFT) | \
75 MXS_PAD_MA_VALID_MASK)
76 #define MXS_PAD_16MA ((PAD_16MA << MXS_PAD_MA_SHIFT) | \
77 MXS_PAD_MA_VALID_MASK)
78
79 #define MXS_PAD_1V8 ((PAD_1V8 << MXS_PAD_VOL_SHIFT) | \
80 MXS_PAD_VOL_VALID_MASK)
81 #define MXS_PAD_3V3 ((PAD_3V3 << MXS_PAD_VOL_SHIFT) | \
82 MXS_PAD_VOL_VALID_MASK)
83
84 #define MXS_PAD_NOPULL ((PAD_NOPULL << MXS_PAD_PULL_SHIFT) | \
85 MXS_PAD_PULL_VALID_MASK)
86 #define MXS_PAD_PULLUP ((PAD_PULLUP << MXS_PAD_PULL_SHIFT) | \
87 MXS_PAD_PULL_VALID_MASK)
88
89 /* generic pad control used in most cases */
90 #define MXS_PAD_CTRL (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL)
91
92 #define MXS_IOMUX_PAD(_bank, _pin, _muxsel, _ma, _vol, _pull) \
93 (((iomux_cfg_t)(_bank) << MXS_PAD_BANK_SHIFT) | \
94 ((iomux_cfg_t)(_pin) << MXS_PAD_PIN_SHIFT) | \
95 ((iomux_cfg_t)(_muxsel) << MXS_PAD_MUXSEL_SHIFT) | \
96 ((iomux_cfg_t)(_ma) << MXS_PAD_MA_SHIFT) | \
97 ((iomux_cfg_t)(_vol) << MXS_PAD_VOL_SHIFT) | \
98 ((iomux_cfg_t)(_pull) << MXS_PAD_PULL_SHIFT))
99
100 /*
101 * A pad becomes naked, when none of mA, vol or pull
102 * validity bits is set.
103 */
104 #define MXS_IOMUX_PAD_NAKED(_bank, _pin, _muxsel) \
105 MXS_IOMUX_PAD(_bank, _pin, _muxsel, 0, 0, 0)
106
PAD_BANK(iomux_cfg_t pad)107 static inline unsigned int PAD_BANK(iomux_cfg_t pad)
108 {
109 return (pad & MXS_PAD_BANK_MASK) >> MXS_PAD_BANK_SHIFT;
110 }
111
PAD_PIN(iomux_cfg_t pad)112 static inline unsigned int PAD_PIN(iomux_cfg_t pad)
113 {
114 return (pad & MXS_PAD_PIN_MASK) >> MXS_PAD_PIN_SHIFT;
115 }
116
PAD_MUXSEL(iomux_cfg_t pad)117 static inline unsigned int PAD_MUXSEL(iomux_cfg_t pad)
118 {
119 return (pad & MXS_PAD_MUXSEL_MASK) >> MXS_PAD_MUXSEL_SHIFT;
120 }
121
PAD_MA(iomux_cfg_t pad)122 static inline unsigned int PAD_MA(iomux_cfg_t pad)
123 {
124 return (pad & MXS_PAD_MA_MASK) >> MXS_PAD_MA_SHIFT;
125 }
126
PAD_MA_VALID(iomux_cfg_t pad)127 static inline unsigned int PAD_MA_VALID(iomux_cfg_t pad)
128 {
129 return (pad & MXS_PAD_MA_VALID_MASK) >> MXS_PAD_MA_VALID_SHIFT;
130 }
131
PAD_VOL(iomux_cfg_t pad)132 static inline unsigned int PAD_VOL(iomux_cfg_t pad)
133 {
134 return (pad & MXS_PAD_VOL_MASK) >> MXS_PAD_VOL_SHIFT;
135 }
136
PAD_VOL_VALID(iomux_cfg_t pad)137 static inline unsigned int PAD_VOL_VALID(iomux_cfg_t pad)
138 {
139 return (pad & MXS_PAD_VOL_VALID_MASK) >> MXS_PAD_VOL_VALID_SHIFT;
140 }
141
PAD_PULL(iomux_cfg_t pad)142 static inline unsigned int PAD_PULL(iomux_cfg_t pad)
143 {
144 return (pad & MXS_PAD_PULL_MASK) >> MXS_PAD_PULL_SHIFT;
145 }
146
PAD_PULL_VALID(iomux_cfg_t pad)147 static inline unsigned int PAD_PULL_VALID(iomux_cfg_t pad)
148 {
149 return (pad & MXS_PAD_PULL_VALID_MASK) >> MXS_PAD_PULL_VALID_SHIFT;
150 }
151
152 /*
153 * configures a single pad in the iomuxer
154 */
155 int mxs_iomux_setup_pad(iomux_cfg_t pad);
156
157 /*
158 * configures multiple pads
159 * convenient way to call the above function with tables
160 */
161 int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count);
162
163 #endif /* __ASSEMBLY__ */
164 #endif /* __MACH_MXS_IOMUX_H__*/
165