119 lines
4.0 KiB
C
119 lines
4.0 KiB
C
/*
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* Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
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* <armlinux@phytec.de>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#ifndef __MACH_IOMUX_V3_H__
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#define __MACH_IOMUX_V3_H__
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/*
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* build IOMUX_PAD structure
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*
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* This iomux scheme is based around pads, which are the physical balls
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* on the processor.
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*
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* - Each pad has a pad control register (IOMUXC_SW_PAD_CTRL_x) which controls
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* things like driving strength and pullup/pulldown.
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* - Each pad can have but not necessarily does have an output routing register
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* (IOMUXC_SW_MUX_CTL_PAD_x).
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* - Each pad can have but not necessarily does have an input routing register
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* (IOMUXC_x_SELECT_INPUT)
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*
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* The three register sets do not have a fixed offset to each other,
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* hence we order this table by pad control registers (which all pads
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* have) and put the optional i/o routing registers into additional
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* fields.
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*
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* The naming convention for the pad modes is MX35_PAD_<padname>__<padmode>
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* If <padname> or <padmode> refers to a GPIO, it is named
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* GPIO_<unit>_<num>
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*
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* IOMUX/PAD Bit field definitions
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*
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* MUX_CTRL_OFS: 0..11 (12)
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* PAD_CTRL_OFS: 12..23 (12)
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* SEL_INPUT_OFS: 24..35 (12)
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* MUX_MODE + SION: 36..40 (5)
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* PAD_CTRL + NO_PAD_CTRL: 41..58 (18)
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* SEL_INP: 59..62 (4)
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* reserved: 63 (1)
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*/
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typedef u64 iomux_v3_cfg_t;
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#define MUX_CTRL_OFS_SHIFT 0
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#define MUX_CTRL_OFS_MASK ((iomux_v3_cfg_t)0xfff << MUX_CTRL_OFS_SHIFT)
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#define MUX_PAD_CTRL_OFS_SHIFT 12
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#define MUX_PAD_CTRL_OFS_MASK ((iomux_v3_cfg_t)0xfff << MUX_PAD_CTRL_OFS_SHIFT)
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#define MUX_SEL_INPUT_OFS_SHIFT 24
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#define MUX_SEL_INPUT_OFS_MASK ((iomux_v3_cfg_t)0xfff << MUX_SEL_INPUT_OFS_SHIFT)
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#define MUX_MODE_SHIFT 36
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#define MUX_MODE_MASK ((iomux_v3_cfg_t)0x1f << MUX_MODE_SHIFT)
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#define MUX_PAD_CTRL_SHIFT 41
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#define MUX_PAD_CTRL_MASK ((iomux_v3_cfg_t)0x3ffff << MUX_PAD_CTRL_SHIFT)
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#define MUX_SEL_INPUT_SHIFT 59
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#define MUX_SEL_INPUT_MASK ((iomux_v3_cfg_t)0xf << MUX_SEL_INPUT_SHIFT)
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#define MUX_PAD_CTRL(x) ((iomux_v3_cfg_t)(x) << MUX_PAD_CTRL_SHIFT)
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#define IOMUX_PAD(_pad_ctrl_ofs, _mux_ctrl_ofs, _mux_mode, _sel_input_ofs, \
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_sel_input, _pad_ctrl) \
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(((iomux_v3_cfg_t)(_mux_ctrl_ofs) << MUX_CTRL_OFS_SHIFT) | \
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((iomux_v3_cfg_t)(_mux_mode) << MUX_MODE_SHIFT) | \
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((iomux_v3_cfg_t)(_pad_ctrl_ofs) << MUX_PAD_CTRL_OFS_SHIFT) | \
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((iomux_v3_cfg_t)(_pad_ctrl) << MUX_PAD_CTRL_SHIFT) | \
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((iomux_v3_cfg_t)(_sel_input_ofs) << MUX_SEL_INPUT_OFS_SHIFT) | \
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((iomux_v3_cfg_t)(_sel_input) << MUX_SEL_INPUT_SHIFT))
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#define NEW_PAD_CTRL(cfg, pad) (((cfg) & ~MUX_PAD_CTRL_MASK) | MUX_PAD_CTRL(pad))
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/*
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* Use to set PAD control
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*/
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#define NO_PAD_CTRL (1 << 17)
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#define PAD_CTL_DVS (1 << 13)
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#define PAD_CTL_HYS (1 << 8)
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#define PAD_CTL_PKE (1 << 7)
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#define PAD_CTL_PUE (1 << 6 | PAD_CTL_PKE)
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#define PAD_CTL_PUS_100K_DOWN (0 << 4 | PAD_CTL_PUE)
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#define PAD_CTL_PUS_47K_UP (1 << 4 | PAD_CTL_PUE)
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#define PAD_CTL_PUS_100K_UP (2 << 4 | PAD_CTL_PUE)
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#define PAD_CTL_PUS_22K_UP (3 << 4 | PAD_CTL_PUE)
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#define PAD_CTL_ODE (1 << 3)
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#define PAD_CTL_DSE_LOW (0 << 1)
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#define PAD_CTL_DSE_MED (1 << 1)
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#define PAD_CTL_DSE_HIGH (2 << 1)
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#define PAD_CTL_DSE_MAX (3 << 1)
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#define PAD_CTL_SRE_FAST (1 << 0)
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#define PAD_CTL_SRE_SLOW (0 << 0)
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#define IOMUX_CONFIG_SION (0x1 << 4)
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/*
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* setups a single pad in the iomuxer
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*/
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int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad);
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/*
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* setups mutliple pads
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* convenient way to call the above function with tables
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*/
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int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count);
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#endif /* __MACH_IOMUX_V3_H__*/
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