iomux-v3.h
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/*
* Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH,
* <armlinux@phytec.de>
*
* 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_IOMUX_V3_H__
#define __MACH_IOMUX_V3_H__
/*
* build IOMUX_PAD structure
*
* This iomux scheme is based around pads, which are the physical balls
* on the processor.
*
* - Each pad has a pad control register (IOMUXC_SW_PAD_CTRL_x) which controls
* things like driving strength and pullup/pulldown.
* - Each pad can have but not necessarily does have an output routing register
* (IOMUXC_SW_MUX_CTL_PAD_x).
* - Each pad can have but not necessarily does have an input routing register
* (IOMUXC_x_SELECT_INPUT)
*
* The three register sets do not have a fixed offset to each other,
* hence we order this table by pad control registers (which all pads
* have) and put the optional i/o routing registers into additional
* fields.
*
* The naming convention for the pad modes is MX35_PAD_<padname>__<padmode>
* If <padname> or <padmode> refers to a GPIO, it is named
* GPIO_<unit>_<num>
*
* IOMUX/PAD Bit field definitions
*
* MUX_CTRL_OFS: 0..11 (12)
* PAD_CTRL_OFS: 12..23 (12)
* SEL_INPUT_OFS: 24..35 (12)
* MUX_MODE + SION: 36..40 (5)
* PAD_CTRL + NO_PAD_CTRL: 41..57 (17)
* SEL_INP: 58..61 (4)
* reserved: 63 (1)
*/
typedef u64 iomux_v3_cfg_t;
#define MUX_CTRL_OFS_SHIFT 0
#define MUX_CTRL_OFS_MASK ((iomux_v3_cfg_t)0xfff << MUX_CTRL_OFS_SHIFT)
#define MUX_PAD_CTRL_OFS_SHIFT 12
#define MUX_PAD_CTRL_OFS_MASK ((iomux_v3_cfg_t)0xfff << MUX_PAD_CTRL_OFS_SHIFT)
#define MUX_SEL_INPUT_OFS_SHIFT 24
#define MUX_SEL_INPUT_OFS_MASK ((iomux_v3_cfg_t)0xfff << MUX_SEL_INPUT_OFS_SHIFT)
#define MUX_MODE_SHIFT 36
#define MUX_MODE_MASK ((iomux_v3_cfg_t)0x1f << MUX_MODE_SHIFT)
#define MUX_PAD_CTRL_SHIFT 41
#define MUX_PAD_CTRL_MASK ((iomux_v3_cfg_t)0x1ffff << MUX_PAD_CTRL_SHIFT)
#define MUX_SEL_INPUT_SHIFT 58
#define MUX_SEL_INPUT_MASK ((iomux_v3_cfg_t)0xf << MUX_SEL_INPUT_SHIFT)
#define MUX_PAD_CTRL(x) ((iomux_v3_cfg_t)(x) << MUX_PAD_CTRL_SHIFT)
#define IOMUX_PAD(_pad_ctrl_ofs, _mux_ctrl_ofs, _mux_mode, _sel_input_ofs, \
_sel_input, _pad_ctrl) \
(((iomux_v3_cfg_t)(_mux_ctrl_ofs) << MUX_CTRL_OFS_SHIFT) | \
((iomux_v3_cfg_t)(_mux_mode) << MUX_MODE_SHIFT) | \
((iomux_v3_cfg_t)(_pad_ctrl_ofs) << MUX_PAD_CTRL_OFS_SHIFT) | \
((iomux_v3_cfg_t)(_pad_ctrl) << MUX_PAD_CTRL_SHIFT) | \
((iomux_v3_cfg_t)(_sel_input_ofs) << MUX_SEL_INPUT_OFS_SHIFT) | \
((iomux_v3_cfg_t)(_sel_input) << MUX_SEL_INPUT_SHIFT))
#define NEW_PAD_CTRL(cfg, pad) (((cfg) & ~MUX_PAD_CTRL_MASK) | MUX_PAD_CTRL(pad))
/*
* Use to set PAD control
*/
#define NO_PAD_CTRL (1 << 16)
#define PAD_CTL_DVS (1 << 13)
#define PAD_CTL_HYS (1 << 8)
#define PAD_CTL_PKE (1 << 7)
#define PAD_CTL_PUE (1 << 6 | PAD_CTL_PKE)
#define PAD_CTL_PUS_100K_DOWN (0 << 4 | PAD_CTL_PUE)
#define PAD_CTL_PUS_47K_UP (1 << 4 | PAD_CTL_PUE)
#define PAD_CTL_PUS_100K_UP (2 << 4 | PAD_CTL_PUE)
#define PAD_CTL_PUS_22K_UP (3 << 4 | PAD_CTL_PUE)
#define PAD_CTL_ODE (1 << 3)
#define PAD_CTL_DSE_LOW (0 << 1)
#define PAD_CTL_DSE_MED (1 << 1)
#define PAD_CTL_DSE_HIGH (2 << 1)
#define PAD_CTL_DSE_MAX (3 << 1)
#define PAD_CTL_SRE_FAST (1 << 0)
#define PAD_CTL_SRE_SLOW (0 << 0)
#define IOMUX_CONFIG_SION (0x1 << 4)
#define MX51_NUM_GPIO_PORT 4
#define GPIO_PIN_MASK 0x1f
#define GPIO_PORT_SHIFT 5
#define GPIO_PORT_MASK (0x7 << GPIO_PORT_SHIFT)
#define GPIO_PORTA (0 << GPIO_PORT_SHIFT)
#define GPIO_PORTB (1 << GPIO_PORT_SHIFT)
#define GPIO_PORTC (2 << GPIO_PORT_SHIFT)
#define GPIO_PORTD (3 << GPIO_PORT_SHIFT)
#define GPIO_PORTE (4 << GPIO_PORT_SHIFT)
#define GPIO_PORTF (5 << GPIO_PORT_SHIFT)
/*
* setups a single pad in the iomuxer
*/
int mxc_iomux_v3_setup_pad(iomux_v3_cfg_t pad);
/*
* setups mutliple pads
* convenient way to call the above function with tables
*/
int mxc_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t *pad_list, unsigned count);
/*
* Initialise the iomux controller
*/
void mxc_iomux_v3_init(void __iomem *iomux_v3_base);
#endif /* __MACH_IOMUX_V3_H__*/