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 * SPDX-License-Identifier: GPL-2.0+
7 */
8
9 #ifndef __MACH_MXS_IOMUX_H__
10 #define __MACH_MXS_IOMUX_H__
11
12 #ifndef __ASSEMBLY__
13
14 #include <asm/types.h>
15
16 /*
17 * IOMUX/PAD Bit field definitions
18 *
19 * PAD_BANK: 0..2 (3)
20 * PAD_PIN: 3..7 (5)
21 * PAD_MUXSEL: 8..9 (2)
22 * PAD_MA: 10..11 (2)
23 * PAD_MA_VALID: 12 (1)
24 * PAD_VOL: 13 (1)
25 * PAD_VOL_VALID: 14 (1)
26 * PAD_PULL: 15 (1)
27 * PAD_PULL_VALID: 16 (1)
28 * RESERVED: 17..31 (15)
29 */
30 typedef u32 iomux_cfg_t;
31
32 #define MXS_PAD_BANK_SHIFT 0
33 #define MXS_PAD_BANK_MASK ((iomux_cfg_t)0x7 << MXS_PAD_BANK_SHIFT)
34 #define MXS_PAD_PIN_SHIFT 3
35 #define MXS_PAD_PIN_MASK ((iomux_cfg_t)0x1f << MXS_PAD_PIN_SHIFT)
36 #define MXS_PAD_MUXSEL_SHIFT 8
37 #define MXS_PAD_MUXSEL_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MUXSEL_SHIFT)
38 #define MXS_PAD_MA_SHIFT 10
39 #define MXS_PAD_MA_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MA_SHIFT)
40 #define MXS_PAD_MA_VALID_SHIFT 12
41 #define MXS_PAD_MA_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_MA_VALID_SHIFT)
42 #define MXS_PAD_VOL_SHIFT 13
43 #define MXS_PAD_VOL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_SHIFT)
44 #define MXS_PAD_VOL_VALID_SHIFT 14
45 #define MXS_PAD_VOL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_VALID_SHIFT)
46 #define MXS_PAD_PULL_SHIFT 15
47 #define MXS_PAD_PULL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_SHIFT)
48 #define MXS_PAD_PULL_VALID_SHIFT 16
49 #define MXS_PAD_PULL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_VALID_SHIFT)
50
51 #define PAD_MUXSEL_0 0
52 #define PAD_MUXSEL_1 1
53 #define PAD_MUXSEL_2 2
54 #define PAD_MUXSEL_GPIO 3
55
56 #define PAD_4MA 0
57 #define PAD_8MA 1
58 #define PAD_12MA 2
59 #define PAD_16MA 3
60
61 #define PAD_1V8 0
62 #if defined(CONFIG_MX28)
63 #define PAD_3V3 1
64 #else
65 #define PAD_3V3 0
66 #endif
67
68 #define PAD_NOPULL 0
69 #define PAD_PULLUP 1
70
71 #define MXS_PAD_4MA ((PAD_4MA << MXS_PAD_MA_SHIFT) | \
72 MXS_PAD_MA_VALID_MASK)
73 #define MXS_PAD_8MA ((PAD_8MA << MXS_PAD_MA_SHIFT) | \
74 MXS_PAD_MA_VALID_MASK)
75 #define MXS_PAD_12MA ((PAD_12MA << MXS_PAD_MA_SHIFT) | \
76 MXS_PAD_MA_VALID_MASK)
77 #define MXS_PAD_16MA ((PAD_16MA << MXS_PAD_MA_SHIFT) | \
78 MXS_PAD_MA_VALID_MASK)
79
80 #define MXS_PAD_1V8 ((PAD_1V8 << MXS_PAD_VOL_SHIFT) | \
81 MXS_PAD_VOL_VALID_MASK)
82 #define MXS_PAD_3V3 ((PAD_3V3 << MXS_PAD_VOL_SHIFT) | \
83 MXS_PAD_VOL_VALID_MASK)
84
85 #define MXS_PAD_NOPULL ((PAD_NOPULL << MXS_PAD_PULL_SHIFT) | \
86 MXS_PAD_PULL_VALID_MASK)
87 #define MXS_PAD_PULLUP ((PAD_PULLUP << MXS_PAD_PULL_SHIFT) | \
88 MXS_PAD_PULL_VALID_MASK)
89
90 /* generic pad control used in most cases */
91 #define MXS_PAD_CTRL (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL)
92
93 #define MXS_IOMUX_PAD(_bank, _pin, _muxsel, _ma, _vol, _pull) \
94 (((iomux_cfg_t)(_bank) << MXS_PAD_BANK_SHIFT) | \
95 ((iomux_cfg_t)(_pin) << MXS_PAD_PIN_SHIFT) | \
96 ((iomux_cfg_t)(_muxsel) << MXS_PAD_MUXSEL_SHIFT) | \
97 ((iomux_cfg_t)(_ma) << MXS_PAD_MA_SHIFT) | \
98 ((iomux_cfg_t)(_vol) << MXS_PAD_VOL_SHIFT) | \
99 ((iomux_cfg_t)(_pull) << MXS_PAD_PULL_SHIFT))
100
101 /*
102 * A pad becomes naked, when none of mA, vol or pull
103 * validity bits is set.
104 */
105 #define MXS_IOMUX_PAD_NAKED(_bank, _pin, _muxsel) \
106 MXS_IOMUX_PAD(_bank, _pin, _muxsel, 0, 0, 0)
107
PAD_BANK(iomux_cfg_t pad)108 static inline unsigned int PAD_BANK(iomux_cfg_t pad)
109 {
110 return (pad & MXS_PAD_BANK_MASK) >> MXS_PAD_BANK_SHIFT;
111 }
112
PAD_PIN(iomux_cfg_t pad)113 static inline unsigned int PAD_PIN(iomux_cfg_t pad)
114 {
115 return (pad & MXS_PAD_PIN_MASK) >> MXS_PAD_PIN_SHIFT;
116 }
117
PAD_MUXSEL(iomux_cfg_t pad)118 static inline unsigned int PAD_MUXSEL(iomux_cfg_t pad)
119 {
120 return (pad & MXS_PAD_MUXSEL_MASK) >> MXS_PAD_MUXSEL_SHIFT;
121 }
122
PAD_MA(iomux_cfg_t pad)123 static inline unsigned int PAD_MA(iomux_cfg_t pad)
124 {
125 return (pad & MXS_PAD_MA_MASK) >> MXS_PAD_MA_SHIFT;
126 }
127
PAD_MA_VALID(iomux_cfg_t pad)128 static inline unsigned int PAD_MA_VALID(iomux_cfg_t pad)
129 {
130 return (pad & MXS_PAD_MA_VALID_MASK) >> MXS_PAD_MA_VALID_SHIFT;
131 }
132
PAD_VOL(iomux_cfg_t pad)133 static inline unsigned int PAD_VOL(iomux_cfg_t pad)
134 {
135 return (pad & MXS_PAD_VOL_MASK) >> MXS_PAD_VOL_SHIFT;
136 }
137
PAD_VOL_VALID(iomux_cfg_t pad)138 static inline unsigned int PAD_VOL_VALID(iomux_cfg_t pad)
139 {
140 return (pad & MXS_PAD_VOL_VALID_MASK) >> MXS_PAD_VOL_VALID_SHIFT;
141 }
142
PAD_PULL(iomux_cfg_t pad)143 static inline unsigned int PAD_PULL(iomux_cfg_t pad)
144 {
145 return (pad & MXS_PAD_PULL_MASK) >> MXS_PAD_PULL_SHIFT;
146 }
147
PAD_PULL_VALID(iomux_cfg_t pad)148 static inline unsigned int PAD_PULL_VALID(iomux_cfg_t pad)
149 {
150 return (pad & MXS_PAD_PULL_VALID_MASK) >> MXS_PAD_PULL_VALID_SHIFT;
151 }
152
153 /*
154 * configures a single pad in the iomuxer
155 */
156 int mxs_iomux_setup_pad(iomux_cfg_t pad);
157
158 /*
159 * configures multiple pads
160 * convenient way to call the above function with tables
161 */
162 int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count);
163
164 #endif /* __ASSEMBLY__ */
165 #endif /* __MACH_MXS_IOMUX_H__*/
166