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7773fd1969
The macro allows easy setting in per-pin, as for example: ,---- | imx_iomux_v3_setup_pad(MX6_PAD_NANDF_D1__GPIO_2_1 | MUX_MODE_SION); `---- The IOMUX_CONFIG_SION allows for reading PAD value from PSR register. The following quote from the datasheet: ,---- | ... | 28.4.2.2 GPIO Write Mode | The programming sequence for driving output signals should be as follows: | 1. Configure IOMUX to select GPIO mode (Via IOMUXC), also enable SION if need | to read loopback pad value through PSR | 2. Configure GPIO direction register to output (GPIO_GDIR[GDIR] set to 1b). | 3. Write value to data register (GPIO_DR). | ... `---- This fixes the gpio_get_value to properly work when a GPIO is set for output and has no conflicts. Thanks for Benoît Thébaudeau <benoit.thebaudeau@advansee.com>, Fabio Estevam <fabio.estevam@freescale.com> and Eric Bénard <eric@eukrea.com> for helping to properly trace this down. Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Acked-by: Stefano Babic <sbabic@denx.de>
174 lines
5.2 KiB
C
174 lines
5.2 KiB
C
/*
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* Based on Linux i.MX iomux-v3.h file:
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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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* Copyright (C) 2011 Freescale Semiconductor, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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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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#include <common.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 SOC_PAD_<padname>__<padmode>
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* If <padname> or <padmode> refers to a GPIO, it is named 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 << \
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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 << \
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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_MODE_SION ((iomux_v3_cfg_t)IOMUX_CONFIG_SION << \
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MUX_MODE_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) | \
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MUX_PAD_CTRL(pad))
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#define __NA_ 0x000
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#define NO_MUX_I 0
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#define NO_PAD_I 0
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#define NO_PAD_CTRL (1 << 17)
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#ifdef CONFIG_MX6
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#define PAD_CTL_HYS (1 << 16)
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#define PAD_CTL_PUS_100K_DOWN (0 << 14 | PAD_CTL_PUE)
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#define PAD_CTL_PUS_47K_UP (1 << 14 | PAD_CTL_PUE)
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#define PAD_CTL_PUS_100K_UP (2 << 14 | PAD_CTL_PUE)
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#define PAD_CTL_PUS_22K_UP (3 << 14 | PAD_CTL_PUE)
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#define PAD_CTL_PUE (1 << 13 | PAD_CTL_PKE)
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#define PAD_CTL_PKE (1 << 12)
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#define PAD_CTL_ODE (1 << 11)
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#define PAD_CTL_SPEED_LOW (1 << 6)
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#define PAD_CTL_SPEED_MED (2 << 6)
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#define PAD_CTL_SPEED_HIGH (3 << 6)
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#define PAD_CTL_DSE_DISABLE (0 << 3)
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#define PAD_CTL_DSE_240ohm (1 << 3)
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#define PAD_CTL_DSE_120ohm (2 << 3)
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#define PAD_CTL_DSE_80ohm (3 << 3)
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#define PAD_CTL_DSE_60ohm (4 << 3)
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#define PAD_CTL_DSE_48ohm (5 << 3)
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#define PAD_CTL_DSE_40ohm (6 << 3)
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#define PAD_CTL_DSE_34ohm (7 << 3)
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#elif defined(CONFIG_VF610)
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#define PAD_MUX_MODE_SHIFT 20
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#define PAD_CTL_SPEED_MED (1 << 12)
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#define PAD_CTL_SPEED_HIGH (3 << 12)
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#define PAD_CTL_DSE_50ohm (3 << 6)
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#define PAD_CTL_DSE_25ohm (6 << 6)
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#define PAD_CTL_DSE_20ohm (7 << 6)
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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_PKE (1 << 3)
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#define PAD_CTL_PUE (1 << 2 | PAD_CTL_PKE)
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#define PAD_CTL_OBE_IBE_ENABLE (3 << 0)
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#else
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#define PAD_CTL_DVS (1 << 13)
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#define PAD_CTL_INPUT_DDR (1 << 9)
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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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#endif
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#define PAD_CTL_SRE_SLOW (0 << 0)
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#define PAD_CTL_SRE_FAST (1 << 0)
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#define IOMUX_CONFIG_SION 0x10
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#define GPIO_PIN_MASK 0x1f
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#define GPIO_PORT_SHIFT 5
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#define GPIO_PORT_MASK (0x7 << GPIO_PORT_SHIFT)
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#define GPIO_PORTA (0 << GPIO_PORT_SHIFT)
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#define GPIO_PORTB (1 << GPIO_PORT_SHIFT)
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#define GPIO_PORTC (2 << GPIO_PORT_SHIFT)
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#define GPIO_PORTD (3 << GPIO_PORT_SHIFT)
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#define GPIO_PORTE (4 << GPIO_PORT_SHIFT)
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#define GPIO_PORTF (5 << GPIO_PORT_SHIFT)
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void imx_iomux_v3_setup_pad(iomux_v3_cfg_t pad);
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void imx_iomux_v3_setup_multiple_pads(iomux_v3_cfg_t const *pad_list,
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unsigned count);
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#endif /* __MACH_IOMUX_V3_H__*/
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