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Diffstat (limited to 'arch/arm/include/asm/arch-mx28/iomux.h')
| -rw-r--r-- | arch/arm/include/asm/arch-mx28/iomux.h | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mx28/iomux.h b/arch/arm/include/asm/arch-mx28/iomux.h new file mode 100644 index 000000000..7abdf58b8 --- /dev/null +++ b/arch/arm/include/asm/arch-mx28/iomux.h @@ -0,0 +1,168 @@ +/* + * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH, + * <armlinux@phytec.de> + * Copyright (C) 2010 Freescale Semiconductor, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + * MA 02110-1301, USA. + */ + +#ifndef __MACH_MXS_IOMUX_H__ +#define __MACH_MXS_IOMUX_H__ + +/* + * IOMUX/PAD Bit field definitions + * + * PAD_BANK: 0..2 (3) + * PAD_PIN: 3..7 (5) + * PAD_MUXSEL: 8..9 (2) + * PAD_MA: 10..11 (2) + * PAD_MA_VALID: 12 (1) + * PAD_VOL: 13 (1) + * PAD_VOL_VALID: 14 (1) + * PAD_PULL: 15 (1) + * PAD_PULL_VALID: 16 (1) + * RESERVED: 17..31 (15) + */ +typedef u32 iomux_cfg_t; + +#define MXS_PAD_BANK_SHIFT 0 +#define MXS_PAD_BANK_MASK ((iomux_cfg_t)0x7 << MXS_PAD_BANK_SHIFT) +#define MXS_PAD_PIN_SHIFT 3 +#define MXS_PAD_PIN_MASK ((iomux_cfg_t)0x1f << MXS_PAD_PIN_SHIFT) +#define MXS_PAD_MUXSEL_SHIFT 8 +#define MXS_PAD_MUXSEL_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MUXSEL_SHIFT) +#define MXS_PAD_MA_SHIFT 10 +#define MXS_PAD_MA_MASK ((iomux_cfg_t)0x3 << MXS_PAD_MA_SHIFT) +#define MXS_PAD_MA_VALID_SHIFT 12 +#define MXS_PAD_MA_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_MA_VALID_SHIFT) +#define MXS_PAD_VOL_SHIFT 13 +#define MXS_PAD_VOL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_SHIFT) +#define MXS_PAD_VOL_VALID_SHIFT 14 +#define MXS_PAD_VOL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_VOL_VALID_SHIFT) +#define MXS_PAD_PULL_SHIFT 15 +#define MXS_PAD_PULL_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_SHIFT) +#define MXS_PAD_PULL_VALID_SHIFT 16 +#define MXS_PAD_PULL_VALID_MASK ((iomux_cfg_t)0x1 << MXS_PAD_PULL_VALID_SHIFT) + +#define PAD_MUXSEL_0 0 +#define PAD_MUXSEL_1 1 +#define PAD_MUXSEL_2 2 +#define PAD_MUXSEL_GPIO 3 + +#define PAD_4MA 0 +#define PAD_8MA 1 +#define PAD_12MA 2 +#define PAD_16MA 3 + +#define PAD_1V8 0 +#define PAD_3V3 1 + +#define PAD_NOPULL 0 +#define PAD_PULLUP 1 + +#define MXS_PAD_4MA ((PAD_4MA << MXS_PAD_MA_SHIFT) | \ + MXS_PAD_MA_VALID_MASK) +#define MXS_PAD_8MA ((PAD_8MA << MXS_PAD_MA_SHIFT) | \ + MXS_PAD_MA_VALID_MASK) +#define MXS_PAD_12MA ((PAD_12MA << MXS_PAD_MA_SHIFT) | \ + MXS_PAD_MA_VALID_MASK) +#define MXS_PAD_16MA ((PAD_16MA << MXS_PAD_MA_SHIFT) | \ + MXS_PAD_MA_VALID_MASK) + +#define MXS_PAD_1V8 ((PAD_1V8 << MXS_PAD_VOL_SHIFT) | \ + MXS_PAD_VOL_VALID_MASK) +#define MXS_PAD_3V3 ((PAD_3V3 << MXS_PAD_VOL_SHIFT) | \ + MXS_PAD_VOL_VALID_MASK) + +#define MXS_PAD_NOPULL ((PAD_NOPULL << MXS_PAD_PULL_SHIFT) | \ + MXS_PAD_PULL_VALID_MASK) +#define MXS_PAD_PULLUP ((PAD_PULLUP << MXS_PAD_PULL_SHIFT) | \ + MXS_PAD_PULL_VALID_MASK) + +/* generic pad control used in most cases */ +#define MXS_PAD_CTRL (MXS_PAD_4MA | MXS_PAD_3V3 | MXS_PAD_NOPULL) + +#define MXS_IOMUX_PAD(_bank, _pin, _muxsel, _ma, _vol, _pull) \ + (((iomux_cfg_t)(_bank) << MXS_PAD_BANK_SHIFT) | \ + ((iomux_cfg_t)(_pin) << MXS_PAD_PIN_SHIFT) | \ + ((iomux_cfg_t)(_muxsel) << MXS_PAD_MUXSEL_SHIFT) | \ + ((iomux_cfg_t)(_ma) << MXS_PAD_MA_SHIFT) | \ + ((iomux_cfg_t)(_vol) << MXS_PAD_VOL_SHIFT) | \ + ((iomux_cfg_t)(_pull) << MXS_PAD_PULL_SHIFT)) + +/* + * A pad becomes naked, when none of mA, vol or pull + * validity bits is set. + */ +#define MXS_IOMUX_PAD_NAKED(_bank, _pin, _muxsel) \ + MXS_IOMUX_PAD(_bank, _pin, _muxsel, 0, 0, 0) + +static inline unsigned int PAD_BANK(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_BANK_MASK) >> MXS_PAD_BANK_SHIFT; +} + +static inline unsigned int PAD_PIN(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_PIN_MASK) >> MXS_PAD_PIN_SHIFT; +} + +static inline unsigned int PAD_MUXSEL(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_MUXSEL_MASK) >> MXS_PAD_MUXSEL_SHIFT; +} + +static inline unsigned int PAD_MA(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_MA_MASK) >> MXS_PAD_MA_SHIFT; +} + +static inline unsigned int PAD_MA_VALID(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_MA_VALID_MASK) >> MXS_PAD_MA_VALID_SHIFT; +} + +static inline unsigned int PAD_VOL(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_VOL_MASK) >> MXS_PAD_VOL_SHIFT; +} + +static inline unsigned int PAD_VOL_VALID(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_VOL_VALID_MASK) >> MXS_PAD_VOL_VALID_SHIFT; +} + +static inline unsigned int PAD_PULL(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_PULL_MASK) >> MXS_PAD_PULL_SHIFT; +} + +static inline unsigned int PAD_PULL_VALID(iomux_cfg_t pad) +{ + return (pad & MXS_PAD_PULL_VALID_MASK) >> MXS_PAD_PULL_VALID_SHIFT; +} + +/* + * configures a single pad in the iomuxer + */ +int mxs_iomux_setup_pad(iomux_cfg_t pad); + +/* + * configures multiple pads + * convenient way to call the above function with tables + */ +int mxs_iomux_setup_multiple_pads(const iomux_cfg_t *pad_list, unsigned count); + +#endif /* __MACH_MXS_IOMUX_H__*/ |