109 lines
3.0 KiB
C
109 lines
3.0 KiB
C
/*
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* Structures and registers for GPIO access in the Nomadik SoC
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*
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* Copyright (C) 2008 STMicroelectronics
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* Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
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* Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __PLAT_NOMADIK_GPIO
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#define __PLAT_NOMADIK_GPIO
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/*
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* "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
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* the "gpio" namespace for generic and cross-machine functions
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*/
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#define GPIO_BLOCK_SHIFT 5
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#define NMK_GPIO_PER_CHIP (1 << GPIO_BLOCK_SHIFT)
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/* Register in the logic block */
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#define NMK_GPIO_DAT 0x00
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#define NMK_GPIO_DATS 0x04
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#define NMK_GPIO_DATC 0x08
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#define NMK_GPIO_PDIS 0x0c
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#define NMK_GPIO_DIR 0x10
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#define NMK_GPIO_DIRS 0x14
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#define NMK_GPIO_DIRC 0x18
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#define NMK_GPIO_SLPC 0x1c
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#define NMK_GPIO_AFSLA 0x20
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#define NMK_GPIO_AFSLB 0x24
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#define NMK_GPIO_LOWEMI 0x28
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#define NMK_GPIO_RIMSC 0x40
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#define NMK_GPIO_FIMSC 0x44
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#define NMK_GPIO_IS 0x48
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#define NMK_GPIO_IC 0x4c
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#define NMK_GPIO_RWIMSC 0x50
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#define NMK_GPIO_FWIMSC 0x54
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#define NMK_GPIO_WKS 0x58
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/* These appear in DB8540 and later ASICs */
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#define NMK_GPIO_EDGELEVEL 0x5C
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#define NMK_GPIO_LEVEL 0x60
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/* Alternate functions: function C is set in hw by setting both A and B */
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#define NMK_GPIO_ALT_GPIO 0
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#define NMK_GPIO_ALT_A 1
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#define NMK_GPIO_ALT_B 2
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#define NMK_GPIO_ALT_C (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
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#define NMK_GPIO_ALT_CX_SHIFT 2
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#define NMK_GPIO_ALT_C1 ((1<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
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#define NMK_GPIO_ALT_C2 ((2<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
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#define NMK_GPIO_ALT_C3 ((3<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
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#define NMK_GPIO_ALT_C4 ((4<<NMK_GPIO_ALT_CX_SHIFT) | NMK_GPIO_ALT_C)
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/* Pull up/down values */
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enum nmk_gpio_pull {
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NMK_GPIO_PULL_NONE,
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NMK_GPIO_PULL_UP,
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NMK_GPIO_PULL_DOWN,
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};
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/* Sleep mode */
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enum nmk_gpio_slpm {
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NMK_GPIO_SLPM_INPUT,
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NMK_GPIO_SLPM_WAKEUP_ENABLE = NMK_GPIO_SLPM_INPUT,
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NMK_GPIO_SLPM_NOCHANGE,
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NMK_GPIO_SLPM_WAKEUP_DISABLE = NMK_GPIO_SLPM_NOCHANGE,
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};
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extern int nmk_gpio_set_slpm(int gpio, enum nmk_gpio_slpm mode);
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extern int nmk_gpio_set_pull(int gpio, enum nmk_gpio_pull pull);
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#ifdef CONFIG_PINCTRL_NOMADIK
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extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
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#else
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static inline int nmk_gpio_set_mode(int gpio, int gpio_mode)
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{
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return -ENODEV;
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}
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#endif
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extern int nmk_gpio_get_mode(int gpio);
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extern void nmk_gpio_wakeups_suspend(void);
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extern void nmk_gpio_wakeups_resume(void);
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extern void nmk_gpio_clocks_enable(void);
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extern void nmk_gpio_clocks_disable(void);
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extern void nmk_gpio_read_pull(int gpio_bank, u32 *pull_up);
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/*
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* Platform data to register a block: only the initial gpio/irq number.
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*/
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struct nmk_gpio_platform_data {
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char *name;
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int first_gpio;
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int first_irq;
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int num_gpio;
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u32 (*get_secondary_status)(unsigned int bank);
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void (*set_ioforce)(bool enable);
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bool supports_sleepmode;
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};
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#endif /* __PLAT_NOMADIK_GPIO */
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