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 #ifndef __ASSEMBLY__ 25 26 #include <asm/types.h> 27 28 /* 29 * IOMUX/PAD Bit field definitions 30 * 31 * PAD_BANK: 0..2 (3) 32 * PAD_PIN: 3..7 (5) 33 * PAD_MUXSEL: 8..9 (2) 34 * PAD_MA: 10..11 (2) 35 * PAD_MA_VALID: 12 (1) 36 * PAD_VOL: 13 (1) 37 * PAD_VOL_VALID: 14 (1) 38 * PAD_PULL: 15 (1) 39 * PAD_PULL_VALID: 16 (1) 40 * RESERVED: 17..31 (15) 41 */ 42 typedef u32 iomux_cfg_t; 43 44 #define MXS_PAD_BANK_SHIFT 0 45 #define MXS_PAD_BANK_MASK ((iomux_cfg_t)0x7 << MXS_PAD_BANK_SHIFT) 46 #define MXS_PAD_PIN_SHIFT 3 47 #define MXS_PAD_PIN_MASK ((iomux_cfg_t)0x1f << MXS_PAD_PIN_SHIFT) 48 #define MXS_PAD_MUXSEL_SHIFT 8 49 #define MXS_PAD_MUXSEL_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MUXSEL_SHIFT) 50 #define MXS_PAD_MA_SHIFT 10 51 #define MXS_PAD_MA_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MA_SHIFT) 52 #define MXS_PAD_MA_VALID_SHIFT 12 53 #define MXS_PAD_MA_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_MA_VALID_SHIFT) 54 #define MXS_PAD_VOL_SHIFT 13 55 #define MXS_PAD_VOL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_SHIFT) 56 #define MXS_PAD_VOL_VALID_SHIFT 14 57 #define MXS_PAD_VOL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_VALID_SHIFT) 58 #define MXS_PAD_PULL_SHIFT 15 59 #define MXS_PAD_PULL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_SHIFT) 60 #define MXS_PAD_PULL_VALID_SHIFT 16 61 #define MXS_PAD_PULL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_VALID_SHIFT) 62 63 #define PAD_MUXSEL_0 0 64 #define PAD_MUXSEL_1 1 65 #define PAD_MUXSEL_2 2 66 #define PAD_MUXSEL_GPIO 3 67 68 #define PAD_4MA 0 69 #define PAD_8MA 1 70 #define PAD_12MA 2 71 #define PAD_16MA 3 72 73 #define PAD_1V8 0 74 #define PAD_3V3 1 75 76 #define PAD_NOPULL 0 77 #define PAD_PULLUP 1 78 79 #define MXS_PAD_4MA ((PAD_4MA << MXS_PAD_MA_SHIFT) | \ 80 MXS_PAD_MA_VALID_MASK) 81 #define MXS_PAD_8MA ((PAD_8MA << MXS_PAD_MA_SHIFT) | \ 82 MXS_PAD_MA_VALID_MASK) 83 #define MXS_PAD_12MA ((PAD_12MA << MXS_PAD_MA_SHIFT) | \ 84 MXS_PAD_MA_VALID_MASK) 85 #define MXS_PAD_16MA ((PAD_16MA << MXS_PAD_MA_SHIFT) | \ 86 MXS_PAD_MA_VALID_MASK) 87 88 #define MXS_PAD_1V8 ((PAD_1V8 << MXS_PAD_VOL_SHIFT) | \ 89 MXS_PAD_VOL_VALID_MASK) 90 #define MXS_PAD_3V3 ((PAD_3V3 << MXS_PAD_VOL_SHIFT) | \ 91 MXS_PAD_VOL_VALID_MASK) 92 93 #define MXS_PAD_NOPULL ((PAD_NOPULL << MXS_PAD_PULL_SHIFT) | \ 94 MXS_PAD_PULL_VALID_MASK) 95 #define MXS_PAD_PULLUP ((PAD_PULLUP << MXS_PAD_PULL_SHIFT) | \ 96 MXS_PAD_PULL_VALID_MASK) 97 98 /* generic pad control used in most cases */ 99 #define MXS_PAD_CTRL (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL) 100 101 #define MXS_IOMUX_PAD(_bank, _pin, _muxsel, _ma, _vol, _pull) \ 102 (((iomux_cfg_t)(_bank) << MXS_PAD_BANK_SHIFT) | \ 103 ((iomux_cfg_t)(_pin) << MXS_PAD_PIN_SHIFT) | \ 104 ((iomux_cfg_t)(_muxsel) << MXS_PAD_MUXSEL_SHIFT) | \ 105 ((iomux_cfg_t)(_ma) << MXS_PAD_MA_SHIFT) | \ 106 ((iomux_cfg_t)(_vol) << MXS_PAD_VOL_SHIFT) | \ 107 ((iomux_cfg_t)(_pull) << MXS_PAD_PULL_SHIFT)) 108 109 /* 110 * A pad becomes naked, when none of mA, vol or pull 111 * validity bits is set. 112 */ 113 #define MXS_IOMUX_PAD_NAKED(_bank, _pin, _muxsel) \ 114 MXS_IOMUX_PAD(_bank, _pin, _muxsel, 0, 0, 0) 115 116 static inline unsigned int PAD_BANK(iomux_cfg_t pad) 117 { 118 return (pad & MXS_PAD_BANK_MASK) >> MXS_PAD_BANK_SHIFT; 119 } 120 121 static inline unsigned int PAD_PIN(iomux_cfg_t pad) 122 { 123 return (pad & MXS_PAD_PIN_MASK) >> MXS_PAD_PIN_SHIFT; 124 } 125 126 static inline unsigned int PAD_MUXSEL(iomux_cfg_t pad) 127 { 128 return (pad & MXS_PAD_MUXSEL_MASK) >> MXS_PAD_MUXSEL_SHIFT; 129 } 130 131 static inline unsigned int PAD_MA(iomux_cfg_t pad) 132 { 133 return (pad & MXS_PAD_MA_MASK) >> MXS_PAD_MA_SHIFT; 134 } 135 136 static inline unsigned int PAD_MA_VALID(iomux_cfg_t pad) 137 { 138 return (pad & MXS_PAD_MA_VALID_MASK) >> MXS_PAD_MA_VALID_SHIFT; 139 } 140 141 static inline unsigned int PAD_VOL(iomux_cfg_t pad) 142 { 143 return (pad & MXS_PAD_VOL_MASK) >> MXS_PAD_VOL_SHIFT; 144 } 145 146 static inline unsigned int PAD_VOL_VALID(iomux_cfg_t pad) 147 { 148 return (pad & MXS_PAD_VOL_VALID_MASK) >> MXS_PAD_VOL_VALID_SHIFT; 149 } 150 151 static inline unsigned int PAD_PULL(iomux_cfg_t pad) 152 { 153 return (pad & MXS_PAD_PULL_MASK) >> MXS_PAD_PULL_SHIFT; 154 } 155 156 static inline unsigned int PAD_PULL_VALID(iomux_cfg_t pad) 157 { 158 return (pad & MXS_PAD_PULL_VALID_MASK) >> MXS_PAD_PULL_VALID_SHIFT; 159 } 160 161 /* 162 * configures a single pad in the iomuxer 163 */ 164 int mxs_iomux_setup_pad(iomux_cfg_t pad); 165 166 /* 167 * configures multiple pads 168 * convenient way to call the above function with tables 169 */ 170 int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count); 171 172 #endif /* __ASSEMBLY__ */ 173 #endif /* __MACH_MXS_IOMUX_H__*/ 174