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) 111 112 static inline unsigned int PAD_BANK(iomux_cfg_t pad) 113 { 114 return (pad & MXS_PAD_BANK_MASK) >> MXS_PAD_BANK_SHIFT; 115 } 116 117 static inline unsigned int PAD_PIN(iomux_cfg_t pad) 118 { 119 return (pad & MXS_PAD_PIN_MASK) >> MXS_PAD_PIN_SHIFT; 120 } 121 122 static inline unsigned int PAD_MUXSEL(iomux_cfg_t pad) 123 { 124 return (pad & MXS_PAD_MUXSEL_MASK) >> MXS_PAD_MUXSEL_SHIFT; 125 } 126 127 static inline unsigned int PAD_MA(iomux_cfg_t pad) 128 { 129 return (pad & MXS_PAD_MA_MASK) >> MXS_PAD_MA_SHIFT; 130 } 131 132 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 } 136 137 static inline unsigned int PAD_VOL(iomux_cfg_t pad) 138 { 139 return (pad & MXS_PAD_VOL_MASK) >> MXS_PAD_VOL_SHIFT; 140 } 141 142 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 } 146 147 static inline unsigned int PAD_PULL(iomux_cfg_t pad) 148 { 149 return (pad & MXS_PAD_PULL_MASK) >> MXS_PAD_PULL_SHIFT; 150 } 151 152 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