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Diffstat (limited to 'arch/arm/mach-imx/iomux-v3.h')
| -rw-r--r-- | arch/arm/mach-imx/iomux-v3.h | 142 |
1 files changed, 142 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/iomux-v3.h b/arch/arm/mach-imx/iomux-v3.h new file mode 100644 index 0000000..2fa3b54 --- /dev/null +++ b/arch/arm/mach-imx/iomux-v3.h @@ -0,0 +1,142 @@ +/* + * 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__*/ + |