S5P4418用于Linux内核的GPIO配置函数
S5P4418 SoC暴露给Linux内核的GPIO配置函数定义在其代码仓库的以下文件中：
- 常量定义：linux/prototype/s5p4418/module/nx_gpio.h
- 函数定义：linux/kernel/kernel-3.4.39/arch/arm/mach-s5p4418/include/mach/soc.h
常量定义：
//------------------------------------------------------------------------------ // // Copyright (C) 2009 Nexell Co., All Rights Reserved // Nexell Co. Proprietary & Confidential // // NEXELL INFORMS THAT THIS CODE AND INFORMATION IS PROVIDED "AS IS" BASE // AND WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING // BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS // FOR A PARTICULAR PURPOSE. // // Module : GPIO // File : nx_gpio.h // Description: // Author : Firmware Team // History : // //------------------------------------------------------------------------------ #ifndef __NX_GPIO_H__ #define __NX_GPIO_H__ #include "../base/nx_prototype.h" #ifdef __cplusplus extern "C" { #endif //------------------------------------------------------------------------------ /// @defgroup GPIO GPIO //------------------------------------------------------------------------------ //@{ /// @brief GPIO Module's Register List struct NX_GPIO_RegisterSet { volatile U32 GPIOxOUT; ///< 0x00 : Output Register volatile U32 GPIOxOUTENB; ///< 0x04 : Output Enable Register volatile U32 GPIOxDETMODE[2]; ///< 0x08 : Event Detect Mode Register volatile U32 GPIOxINTENB; ///< 0x10 : Interrupt Enable Register volatile U32 GPIOxDET; ///< 0x14 : Event Detect Register volatile U32 GPIOxPAD; ///< 0x18 : PAD Status Register volatile U32 GPIOxPUENB; ///< 0x1C : Pull Up Enable Register volatile U32 GPIOxALTFN[2]; ///< 0x20 : Alternate Function Select Register volatile U32 GPIOxDETMODEEX; ///< 0x28 : Event Detect Mode extended Register volatile U32 __Reserved[4]; ///< 0x2B : volatile U32 GPIOxDETENB; ///< 0x3C : IntPend Detect Enable Register // @added charles 20121127 RTL에는 있는데 proto에는 없어서 추가 volatile U32 GPIOx_SLEW; ///< 0x40 volatile U32 GPIOx_SLEW_DISABLE_DEFAULT; ///< 0x44 volatile U32 GPIOx_DRV1; ///< 0x48 volatile U32 GPIOx_DRV1_DISABLE_DEFAULT; ///< 0x4C volatile U32 GPIOx_DRV0; ///< 0x50 volatile U32 GPIOx_DRV0_DISABLE_DEFAULT; ///< 0x54 volatile U32 GPIOx_PULLSEL; ///< 0x58 volatile U32 GPIOx_PULLSEL_DISABLE_DEFAULT; ///< 0x5C volatile U32 GPIOx_PULLENB; ///< 0x60 volatile U32 GPIOx_PULLENB_DISABLE_DEFAULT; ///< 0x64 volatile U32 GPIOx_InputMuxSelect0; ///< 0x68 volatile U32 GPIOx_InputMuxSelect1; ///< 0x6C U8 __Reserved1[0x1000-0x70]; }; ///@brief GPIO Interrupts for interrupt interface enum { NX_GPIO_INT_GPIO0 = 0, ///< GPIO 0 Interrupt NX_GPIO_INT_GPIO1 = 1, ///< GPIO 1 Interrupt NX_GPIO_INT_GPIO2 = 2, ///< GPIO 2 Interrupt NX_GPIO_INT_GPIO3 = 3, ///< GPIO 3 Interrupt NX_GPIO_INT_GPIO4 = 4, ///< GPIO 4 Interrupt NX_GPIO_INT_GPIO5 = 5, ///< GPIO 5 Interrupt NX_GPIO_INT_GPIO6 = 6, ///< GPIO 6 Interrupt NX_GPIO_INT_GPIO7 = 7, ///< GPIO 7 Interrupt NX_GPIO_INT_GPIO8 = 8, ///< GPIO 8 Interrupt NX_GPIO_INT_GPIO9 = 9, ///< GPIO 9 Interrupt NX_GPIO_INT_GPIO10 = 10, ///< GPIO 10 Interrupt NX_GPIO_INT_GPIO11 = 11, ///< GPIO 11 Interrupt NX_GPIO_INT_GPIO12 = 12, ///< GPIO 12 Interrupt NX_GPIO_INT_GPIO13 = 13, ///< GPIO 13 Interrupt NX_GPIO_INT_GPIO14 = 14, ///< GPIO 14 Interrupt NX_GPIO_INT_GPIO15 = 15, ///< GPIO 15 Interrupt NX_GPIO_INT_GPIO16 = 16, ///< GPIO 16 Interrupt NX_GPIO_INT_GPIO17 = 17, ///< GPIO 17 Interrupt NX_GPIO_INT_GPIO18 = 18, ///< GPIO 18 Interrupt NX_GPIO_INT_GPIO19 = 19, ///< GPIO 19 Interrupt NX_GPIO_INT_GPIO20 = 20, ///< GPIO 20 Interrupt NX_GPIO_INT_GPIO21 = 21, ///< GPIO 21 Interrupt NX_GPIO_INT_GPIO22 = 22, ///< GPIO 22 Interrupt NX_GPIO_INT_GPIO23 = 23, ///< GPIO 23 Interrupt NX_GPIO_INT_GPIO24 = 24, ///< GPIO 24 Interrupt NX_GPIO_INT_GPIO25 = 25, ///< GPIO 25 Interrupt NX_GPIO_INT_GPIO26 = 26, ///< GPIO 26 Interrupt NX_GPIO_INT_GPIO27 = 27, ///< GPIO 27 Interrupt NX_GPIO_INT_GPIO28 = 28, ///< GPIO 28 Interrupt NX_GPIO_INT_GPIO29 = 29, ///< GPIO 29 Interrupt NX_GPIO_INT_GPIO30 = 30, ///< GPIO 30 Interrupt NX_GPIO_INT_GPIO31 = 31 ///< GPIO 31 Interrupt }; /// @brief GPIO interrupt mode typedef enum { NX_GPIO_INTMODE_LOWLEVEL = 0UL, ///< Low level detect NX_GPIO_INTMODE_HIGHLEVEL = 1UL, ///< High level detect NX_GPIO_INTMODE_FALLINGEDGE = 2UL, ///< Falling edge detect NX_GPIO_INTMODE_RISINGEDGE = 3UL, ///< Rising edge detect NX_GPIO_INTMODE_BOTHEDGE = 4UL ///< both (rise and falling) edge detect }NX_GPIO_INTMODE; /// @brief I/O mode typedef enum { NX_GPIO_PADFUNC_0 = 0UL, ///< Alternate function 0 NX_GPIO_PADFUNC_1 = 1UL, ///< Alternate function 1 NX_GPIO_PADFUNC_2 = 2UL, ///< Alternate function 2 NX_GPIO_PADFUNC_3 = 3UL ///< Alternate function 3 }NX_GPIO_PADFUNC; /// @brief Pull I/O mode typedef enum { NX_GPIO_PADPULL_DN = 0UL, NX_GPIO_PADPULL_UP = 1UL, NX_GPIO_PADPULL_OFF = 2UL }NX_GPIO_PADPULL; //------------------------------------------------------------------------------ /// @name Module Interface //@{ CBOOL NX_GPIO_Initialize( void ); U32 NX_GPIO_GetNumberOfModule( void ); //@} //------------------------------------------------------------------------------ /// @name Basic Interface //@{ U32 NX_GPIO_GetPhysicalAddress( U32 ModuleIndex ); U32 NX_GPIO_GetSizeOfRegisterSet( void ); void NX_GPIO_SetBaseAddress( U32 ModuleIndex, U32 BaseAddress ); U32 NX_GPIO_GetBaseAddress( U32 ModuleIndex ); CBOOL NX_GPIO_OpenModule( U32 ModuleIndex ); CBOOL NX_GPIO_CloseModule( U32 ModuleIndex ); CBOOL NX_GPIO_CheckBusy( U32 ModuleIndex ); //@} //------------------------------------------------------------------------------ /// @name Interrupt Interface //@{ U32 NX_GPIO_GetInterruptNumber( U32 ModuleIndex ); void NX_GPIO_SetInterruptEnable( U32 ModuleIndex, S32 IntNum, CBOOL Enable ); CBOOL NX_GPIO_GetInterruptEnable( U32 ModuleIndex, S32 IntNum ); CBOOL NX_GPIO_GetInterruptPending( U32 ModuleIndex, S32 IntNum ); void NX_GPIO_ClearInterruptPending( U32 ModuleIndex, S32 IntNum ); void NX_GPIO_SetInterruptEnableAll( U32 ModuleIndex, CBOOL Enable ); CBOOL NX_GPIO_GetInterruptEnableAll( U32 ModuleIndex ); CBOOL NX_GPIO_GetInterruptPendingAll( U32 ModuleIndex ); void NX_GPIO_ClearInterruptPendingAll( U32 ModuleIndex ); void NX_GPIO_SetInterruptEnable32( U32 ModuleIndex, U32 EnableFlag ); U32 NX_GPIO_GetInterruptEnable32( U32 ModuleIndex ); U32 NX_GPIO_GetInterruptPending32( U32 ModuleIndex ); void NX_GPIO_ClearInterruptPending32( U32 ModuleIndex, U32 PendingFlag ); S32 NX_GPIO_GetInterruptPendingNumber( U32 ModuleIndex ); // -1 if None //@} //------------------------------------------------------------------------------ /// @name GPIO Operation. //@{ void NX_GPIO_SetInterruptMode( U32 ModuleIndex, U32 BitNumber, NX_GPIO_INTMODE IntMode ); NX_GPIO_INTMODE NX_GPIO_GetInterruptMode( U32 ModuleIndex, U32 BitNumber ); void NX_GPIO_SetDetectEnable ( U32 ModuleIndex, U32 BitNumber, CBOOL DetectEnb ); CBOOL NX_GPIO_GetDetectEnable ( U32 ModuleIndex, U32 BitNumber ); void NX_GPIO_SetDetectEnable32 ( U32 ModuleIndex, U32 EnableFlag ); U32 NX_GPIO_GetDetectEnable32 ( U32 ModuleIndex ); void NX_GPIO_SetOutputEnable ( U32 ModuleIndex, U32 BitNumber, CBOOL OutputEnb ); CBOOL NX_GPIO_GetOutputEnable ( U32 ModuleIndex, U32 BitNumber ); void NX_GPIO_SetOutputEnable32 ( U32 ModuleIndex, CBOOL OutputEnb ); U32 NX_GPIO_GetOutputEnable32 ( U32 ModuleIndex ); void NX_GPIO_SetOutputValue ( U32 ModuleIndex, U32 BitNumber, CBOOL Value ); CBOOL NX_GPIO_GetOutputValue ( U32 ModuleIndex, U32 BitNumber ); void NX_GPIO_SetOutputValue32 ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetOutputValue32 ( U32 ModuleIndex ); CBOOL NX_GPIO_GetInputValue ( U32 ModuleIndex, U32 BitNumber ); void NX_GPIO_SetPullMode ( U32 ModuleIndex, U32 BitNumber, NX_GPIO_PADPULL mode); void NX_GPIO_SetPullSelect ( U32 ModuleIndex, U32 BitNumber, CBOOL enable); CBOOL NX_GPIO_GetPullSelect ( U32 ModuleIndex, U32 BitNumber ); void NX_GPIO_SetPullSelect32 ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetPullSelect32 ( U32 ModuleIndex ); void NX_GPIO_SetPullEnable ( U32 ModuleIndex, U32 BitNumber, CBOOL enable); CBOOL NX_GPIO_GetPullEnable ( U32 ModuleIndex, U32 BitNumber ); void NX_GPIO_SetPullEnable32 ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetPullEnable32 ( U32 ModuleIndex ); void NX_GPIO_SetPadFunction( U32 ModuleIndex, U32 BitNumber, NX_GPIO_PADFUNC padfunc ); void NX_GPIO_SetPadFunction32_0( U32 ModuleIndex, U32 Value ); void NX_GPIO_SetPadFunction32_1( U32 ModuleIndex, U32 Value ); NX_GPIO_PADFUNC NX_GPIO_GetPadFunction( U32 ModuleIndex, U32 BitNumber ); //------------------------------------------------------------------------------ /// @name GPIO Operation. //@{ void NX_GPIO_SetSLEW ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetSLEW ( U32 ModuleIndex ); void NX_GPIO_SetSLEW_DISABLE_DEFAULT ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetSLEW_DISABLE_DEFAULT ( U32 ModuleIndex ); void NX_GPIO_SetDRV1 ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetDRV1 ( U32 ModuleIndex ); void NX_GPIO_SetDRV1_DISABLE_DEFAULT ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetDRV1_DISABLE_DEFAULT ( U32 ModuleIndex ); void NX_GPIO_SetDRV0 ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetDRV0 ( U32 ModuleIndex ); void NX_GPIO_SetDRV0_DISABLE_DEFAULT ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetDRV0_DISABLE_DEFAULT ( U32 ModuleIndex ); void NX_GPIO_SetPULLSEL ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetPULLSEL ( U32 ModuleIndex ); void NX_GPIO_SetPULLSEL_DISABLE_DEFAULT ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetPULLSEL_DISABLE_DEFAULT ( U32 ModuleIndex ); void NX_GPIO_SetPULLENB ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetPULLENB ( U32 ModuleIndex ); void NX_GPIO_SetPULLENB_DISABLE_DEFAULT ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetPULLENB_DISABLE_DEFAULT ( U32 ModuleIndex ); void NX_GPIO_SetInputMuxSelect0 ( U32 ModuleIndex, U32 Value ); void NX_GPIO_SetInputMuxSelect1 ( U32 ModuleIndex, U32 Value ); U32 NX_GPIO_GetValidBit( U32 ModuleIndex ); void NX_GPIO_SetPadFunctionEnable ( U32 padInfo ); //@} //@} #ifdef __cplusplus } #endif #endif //__NX_GPIO_H__
函数定义：
/* * * Gpio control interface functions for nexell cpu * */ /* Nomal */ extern void nxp_soc_gpio_device_init(void); extern int nxp_soc_gpio_get_altnum(unsigned int io); extern void nxp_soc_gpio_set_io_func(unsigned int io, unsigned int func); extern unsigned int nxp_soc_gpio_get_io_func(unsigned int io); extern void nxp_soc_gpio_set_io_dir(unsigned int io, int out); extern int nxp_soc_gpio_get_io_dir(unsigned int io); extern void nxp_soc_gpio_set_io_pull_enb(unsigned int io, int on); extern int nxp_soc_gpio_get_io_pull_enb(unsigned int io); extern void nxp_soc_gpio_set_io_pull_sel(unsigned int io, int on); extern int nxp_soc_gpio_get_io_pull_sel(unsigned int io); extern void nxp_soc_gpio_set_io_drv(int gpio, int mode); extern int nxp_soc_gpio_get_io_drv(int gpio); extern void nxp_soc_gpio_set_out_value(unsigned int io, int high); extern int nxp_soc_gpio_get_out_value(unsigned int io); extern int nxp_soc_gpio_get_in_value(unsigned int io); /* Interrupt */ extern void nxp_soc_gpio_set_int_enable(unsigned int io, int on); extern int nxp_soc_gpio_get_int_enable(unsigned int io); extern void nxp_soc_gpio_set_int_mode(unsigned int io, unsigned int mode); extern int nxp_soc_gpio_get_int_mode(unsigned int io); extern int nxp_soc_gpio_get_int_pend(unsigned int io); extern void nxp_soc_gpio_clr_int_pend(unsigned int io); /* Alive */ extern void nxp_soc_alive_set_det_enable(unsigned int io, int on); extern int nxp_soc_alive_get_det_enable(unsigned int io); extern void nxp_soc_alive_set_det_mode(unsigned int io, unsigned int mode, int on); extern int nxp_soc_alive_get_det_mode(unsigned int io, unsigned int mode); extern int nxp_soc_alive_get_int_pend(unsigned int io); extern void nxp_soc_alive_clr_int_pend(unsigned int io);
Linux内核标准GPIO库linux/gpio.h同样可用，参考 https://blog.csdn.net/qq_37596943/article/details/103672254 ：
- int gpio_request(unsigned gpio, const char *label);
- void gpio_free(unsigned gpio);
- int gpio_direction_output(unsigned gpio, int value);
- int gpio_direction_input(unsigned gpio);
- int gpio_set_value(unsigned gpio, int value);
- int gpio_get_value(unsigned gpio);
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