diff options
| -rw-r--r-- | arch/arm/cpu/armv7/mx7ulp/Makefile | 8 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/mx7ulp/iomux.c | 67 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx7ulp/iomux.h | 95 |
3 files changed, 170 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx7ulp/Makefile b/arch/arm/cpu/armv7/mx7ulp/Makefile new file mode 100644 index 0000000..be038e7 --- /dev/null +++ b/arch/arm/cpu/armv7/mx7ulp/Makefile @@ -0,0 +1,8 @@ +# +# (C) Copyright 2016 Freescale Semiconductor, Inc. +# +# SPDX-License-Identifier: GPL-2.0+ +# +# + +obj-y := iomux.o diff --git a/arch/arm/cpu/armv7/mx7ulp/iomux.c b/arch/arm/cpu/armv7/mx7ulp/iomux.c new file mode 100644 index 0000000..07e0930 --- /dev/null +++ b/arch/arm/cpu/armv7/mx7ulp/iomux.c @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> +#include <asm/arch/iomux.h> + +static void *base = (void *)IOMUXC_BASE_ADDR; + +/* iomuxc0 base address. In imx7ulp-pins.h, the offsets of pins in iomuxc0 are from 0xD000, + * so we set the base address to (0x4103D000 - 0xD000 = 0x41030000); + */ +static void *base_mports = (void *)(AIPS0_BASE + 0x30000); + +/* + * configures a single pad in the iomuxer + */ +void mx7ulp_iomux_setup_pad(iomux_cfg_t pad) +{ + u32 mux_ctrl_ofs = (pad & MUX_CTRL_OFS_MASK) >> MUX_CTRL_OFS_SHIFT; + u32 mux_mode = (pad & MUX_MODE_MASK) >> MUX_MODE_SHIFT; + u32 sel_input_ofs = + (pad & MUX_SEL_INPUT_OFS_MASK) >> MUX_SEL_INPUT_OFS_SHIFT; + u32 sel_input = + (pad & MUX_SEL_INPUT_MASK) >> MUX_SEL_INPUT_SHIFT; + u32 pad_ctrl_ofs = mux_ctrl_ofs; + u32 pad_ctrl = (pad & MUX_PAD_CTRL_MASK) >> MUX_PAD_CTRL_SHIFT; + + debug("[PAD CFG] = 0x%16llX \r\n\tmux_ctl = 0x%X(0x%X) sel_input = 0x%X(0x%X) pad_ctrl = 0x%X(0x%X)\r\n", + pad, mux_ctrl_ofs, mux_mode, sel_input_ofs, sel_input, + pad_ctrl_ofs, pad_ctrl); + + if (mux_mode & IOMUX_CONFIG_MPORTS) { + mux_mode &= ~IOMUX_CONFIG_MPORTS; + base = base_mports; + } else { + base = (void *)IOMUXC_BASE_ADDR; + } + + __raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) & IOMUXC_PCR_MUX_ALT_MASK), + base + mux_ctrl_ofs); + + if (sel_input_ofs) + __raw_writel((sel_input << IOMUXC_PSMI_IMUX_ALT_SHIFT), + base + sel_input_ofs); + + if (!(pad_ctrl & NO_PAD_CTRL)) + __raw_writel(((mux_mode << IOMUXC_PCR_MUX_ALT_SHIFT) & IOMUXC_PCR_MUX_ALT_MASK) | + (pad_ctrl & (~IOMUXC_PCR_MUX_ALT_MASK)), + base + pad_ctrl_ofs); +} + +/* configures a list of pads within declared with IOMUX_PADS macro */ +void mx7ulp_iomux_setup_multiple_pads(iomux_cfg_t const *pad_list, + unsigned count) +{ + iomux_cfg_t const *p = pad_list; + int i; + + for (i = 0; i < count; i++) { + mx7ulp_iomux_setup_pad(*p); + p++; + } +} 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__*/ |