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Diffstat (limited to 'arch/arm/include/asm')
| -rw-r--r-- | arch/arm/include/asm/arch-mx7ulp/iomux.h | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/arm/include/asm/arch-mx7ulp/iomux.h b/arch/arm/include/asm/arch-mx7ulp/iomux.h new file mode 100644 index 0000000..a2307db --- /dev/null +++ b/arch/arm/include/asm/arch-mx7ulp/iomux.h @@ -0,0 +1,95 @@ +/* + * Based on Linux i.MX iomux-v3.h file: + * Copyright (C) 2009 by Jan Weitzel Phytec Messtechnik GmbH, + * <armlinux@phytec.de> + * + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __MACH_IOMUX_H__ +#define __MACH_IOMUX_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 SOC_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..15 (16) + * SEL_INPUT_OFS: 16..31 (16) + * MUX_MODE: 32..37 (6) + * SEL_INP: 38..41 (4) + * PAD_CTRL + NO_PAD_CTRL: 42..60 (19) + * reserved: 61-63 (3) +*/ + +typedef u64 iomux_cfg_t; + +#define MUX_CTRL_OFS_SHIFT 0 +#define MUX_CTRL_OFS_MASK ((iomux_cfg_t)0xffff << MUX_CTRL_OFS_SHIFT) +#define MUX_SEL_INPUT_OFS_SHIFT 16 +#define MUX_SEL_INPUT_OFS_MASK ((iomux_cfg_t)0xffff << \ + MUX_SEL_INPUT_OFS_SHIFT) + +#define MUX_MODE_SHIFT 32 +#define MUX_MODE_MASK ((iomux_cfg_t)0x3f << MUX_MODE_SHIFT) +#define MUX_SEL_INPUT_SHIFT 38 +#define MUX_SEL_INPUT_MASK ((iomux_cfg_t)0xf << MUX_SEL_INPUT_SHIFT) +#define MUX_PAD_CTRL_SHIFT 42 +#define MUX_PAD_CTRL_MASK ((iomux_cfg_t)0x7ffff << MUX_PAD_CTRL_SHIFT) + +#define MUX_PAD_CTRL(x) ((iomux_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_cfg_t)(mux_ctrl_ofs) << MUX_CTRL_OFS_SHIFT) | \ + ((iomux_cfg_t)(mux_mode) << MUX_MODE_SHIFT) | \ + ((iomux_cfg_t)(pad_ctrl) << MUX_PAD_CTRL_SHIFT) | \ + ((iomux_cfg_t)(sel_input_ofs) << MUX_SEL_INPUT_OFS_SHIFT)| \ + ((iomux_cfg_t)(sel_input) << MUX_SEL_INPUT_SHIFT)) + +#define NEW_PAD_CTRL(cfg, pad) (((cfg) & ~MUX_PAD_CTRL_MASK) | \ + MUX_PAD_CTRL(pad)) + + +#define IOMUX_CONFIG_MPORTS 0x20 +#define MUX_MODE_MPORTS ((iomux_v3_cfg_t)IOMUX_CONFIG_MPORTS << \ + MUX_MODE_SHIFT) + +/* Bit definition below needs to be fixed acccording to ulp rm */ + +#define NO_PAD_CTRL (1 << 18) +#define PAD_CTL_OBE_ENABLE (1 << 17) +#define PAD_CTL_IBE_ENABLE (1 << 16) +#define PAD_CTL_DSE (1 << 6) +#define PAD_CTL_ODE (1 << 5) +#define PAD_CTL_SRE_FAST (0 << 2) +#define PAD_CTL_SRE_SLOW (1 << 2) +#define PAD_CTL_PUE (1 << 1) +#define PAD_CTL_PUS_UP ((1 << 0) | PAD_CTL_PUE) +#define PAD_CTL_PUS_DOWN ((0 << 0) | PAD_CTL_PUE) + + +void mx7ulp_iomux_setup_pad(iomux_cfg_t pad); +void mx7ulp_iomux_setup_multiple_pads(iomux_cfg_t const *pad_list, + unsigned count); +#endif /* __MACH_IOMUX_H__*/ |