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Diffstat (limited to 'arch/arm/mach-mx3/iomux.h')
| -rw-r--r-- | arch/arm/mach-mx3/iomux.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/arch/arm/mach-mx3/iomux.h b/arch/arm/mach-mx3/iomux.h new file mode 100644 index 000000000000..de2651edc29f --- /dev/null +++ b/arch/arm/mach-mx3/iomux.h @@ -0,0 +1,186 @@ +/* + * Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved. + */ + +/* + * The code contained herein is licensed under the GNU General Public + * License. You may obtain a copy of the GNU General Public License + * Version 2 or later at the following locations: + * + * http://www.opensource.org/licenses/gpl-license.html + * http://www.gnu.org/copyleft/gpl.html + */ +#ifndef __MACH_MX31_IOMUX_H__ +#define __MACH_MX31_IOMUX_H__ + +#include <linux/types.h> +#include <mach/gpio.h> +#include "mx31_pins.h" + +typedef unsigned int iomux_pin_name_t; +/*! + * @file mach-mx3/iomux.h + * + * @brief I/O Muxing control definitions and functions + * + * @ingroup GPIO_MX31 + */ + +/*! + * various IOMUX output functions + */ +typedef enum iomux_output_config { + OUTPUTCONFIG_GPIO = 0, /*!< used as GPIO */ + OUTPUTCONFIG_FUNC, /*!< used as function */ + OUTPUTCONFIG_ALT1, /*!< used as alternate function 1 */ + OUTPUTCONFIG_ALT2, /*!< used as alternate function 2 */ + OUTPUTCONFIG_ALT3, /*!< used as alternate function 3 */ + OUTPUTCONFIG_ALT4, /*!< used as alternate function 4 */ + OUTPUTCONFIG_ALT5, /*!< used as alternate function 5 */ + OUTPUTCONFIG_ALT6 /*!< used as alternate function 6 */ +} iomux_pin_ocfg_t; + +/*! + * various IOMUX input functions + */ +typedef enum iomux_input_config { + INPUTCONFIG_NONE = 0, /*!< not configured for input */ + INPUTCONFIG_GPIO = 1 << 0, /*!< used as GPIO */ + INPUTCONFIG_FUNC = 1 << 1, /*!< used as function */ + INPUTCONFIG_ALT1 = 1 << 2, /*!< used as alternate function 1 */ + INPUTCONFIG_ALT2 = 1 << 3 /*!< used as alternate function 2 */ +} iomux_pin_icfg_t; + +/*! + * various IOMUX pad functions + */ +typedef enum iomux_pad_config { + PAD_CTL_NOLOOPBACK = 0x0 << 9, + PAD_CTL_LOOPBACK = 0x1 << 9, + PAD_CTL_PKE_NONE = 0x0 << 8, + PAD_CTL_PKE_ENABLE = 0x1 << 8, + PAD_CTL_PUE_KEEPER = 0x0 << 7, + PAD_CTL_PUE_PUD = 0x1 << 7, + PAD_CTL_100K_PD = 0x0 << 5, + PAD_CTL_100K_PU = 0x1 << 5, + PAD_CTL_47K_PU = 0x2 << 5, + PAD_CTL_22K_PU = 0x3 << 5, + PAD_CTL_HYS_CMOS = 0x0 << 4, + PAD_CTL_HYS_SCHMITZ = 0x1 << 4, + PAD_CTL_ODE_CMOS = 0x0 << 3, + PAD_CTL_ODE_OpenDrain = 0x1 << 3, + PAD_CTL_DRV_NORMAL = 0x0 << 1, + PAD_CTL_DRV_HIGH = 0x1 << 1, + PAD_CTL_DRV_MAX = 0x2 << 1, + PAD_CTL_SRE_SLOW = 0x0 << 0, + PAD_CTL_SRE_FAST = 0x1 << 0 +} iomux_pad_config_t; + +/*! + * various IOMUX general purpose functions + */ +typedef enum iomux_gp_func { + MUX_PGP_FIRI = 0x1 << 0, + MUX_DDR_MODE = 0x1 << 1, + MUX_PGP_CSPI_BB = 0x1 << 2, + MUX_PGP_ATA_1 = 0x1 << 3, + MUX_PGP_ATA_2 = 0x1 << 4, + MUX_PGP_ATA_3 = 0x1 << 5, + MUX_PGP_ATA_4 = 0x1 << 6, + MUX_PGP_ATA_5 = 0x1 << 7, + MUX_PGP_ATA_6 = 0x1 << 8, + MUX_PGP_ATA_7 = 0x1 << 9, + MUX_PGP_ATA_8 = 0x1 << 10, + MUX_PGP_UH2 = 0x1 << 11, + MUX_SDCTL_CSD0_SEL = 0x1 << 12, + MUX_SDCTL_CSD1_SEL = 0x1 << 13, + MUX_CSPI1_UART3 = 0x1 << 14, + MUX_EXTDMAREQ2_MBX_SEL = 0x1 << 15, + MUX_TAMPER_DETECT_EN = 0x1 << 16, + MUX_PGP_USB_4WIRE = 0x1 << 17, + MUX_PGB_USB_COMMON = 0x1 << 18, + MUX_SDHC_MEMSTICK1 = 0x1 << 19, + MUX_SDHC_MEMSTICK2 = 0x1 << 20, + MUX_PGP_SPLL_BYP = 0x1 << 21, + MUX_PGP_UPLL_BYP = 0x1 << 22, + MUX_PGP_MSHC1_CLK_SEL = 0x1 << 23, + MUX_PGP_MSHC2_CLK_SEL = 0x1 << 24, + MUX_CSPI3_UART5_SEL = 0x1 << 25, + MUX_PGP_ATA_9 = 0x1 << 26, + MUX_PGP_USB_SUSPEND = 0x1 << 27, + MUX_PGP_USB_OTG_LOOPBACK = 0x1 << 28, + MUX_PGP_USB_HS1_LOOPBACK = 0x1 << 29, + MUX_PGP_USB_HS2_LOOPBACK = 0x1 << 30, + MUX_CLKO_DDR_MODE = 0x1 << 31, +} iomux_gp_func_t; + +/*! + * This function is used to configure a pin through the IOMUX module. + * + * @param pin a pin number as defined in \b #iomux_pin_name_t + * @param out an output function as defined in \b #iomux_pin_ocfg_t + * @param in an input function as defined in \b #iomux_pin_icfg_t + * @return 0 if successful; Non-zero otherwise + */ +int iomux_config_mux(iomux_pin_name_t pin, iomux_pin_ocfg_t out, + iomux_pin_icfg_t in); + +/*! + * This function configures the pad value for a IOMUX pin. + * + * @param pin a pin number as defined in \b #iomux_pins + * @param config ORed value of elements defined in \b #iomux_pad_config_t + */ +void iomux_config_pad(iomux_pin_name_t pin, __u32 config); + +/*! + * This function enables/disables the general purpose function for a particular + * signal. + * + * @param gp one signal as defined in \b #iomux_gp_func_t + * @param en \b #true to enable; \b #false to disable + */ +void iomux_config_gpr(iomux_gp_func_t gp, bool en); + +/*! + * Request ownership for an IO pin. This function has to be the first one + * being called before that pin is used. The caller has to check the + * return value to make sure it returns 0. + * + * @param pin a name defined by \b iomux_pin_name_t + * @param out an output function as defined in \b #iomux_pin_ocfg_t + * @param in an input function as defined in \b #iomux_pin_icfg_t + * + * @return 0 if successful; Non-zero otherwise + */ +int mxc_request_iomux(iomux_pin_name_t pin, iomux_pin_ocfg_t out, + iomux_pin_icfg_t in); + +/*! + * Release ownership for an IO pin + * + * @param pin a name defined by \b iomux_pin_name_t + * @param out an output function as defined in \b #iomux_pin_ocfg_t + * @param in an input function as defined in \b #iomux_pin_icfg_t + */ +void mxc_free_iomux(iomux_pin_name_t pin, iomux_pin_ocfg_t out, + iomux_pin_icfg_t in); + +/*! + * This function enables/disables the general purpose function for a particular + * signal. + * + * @param gp one signal as defined in \b #iomux_gp_func_t + * @param en \b #true to enable; \b #false to disable + */ +void mxc_iomux_set_gpr(iomux_gp_func_t gp, bool en); + +/*! + * This function configures the pad value for a IOMUX pin. + * + * @param pin a pin number as defined in \b #iomux_pin_name_t + * @param config the ORed value of elements defined in \b #iomux_pad_config_t + */ +void mxc_iomux_set_pad(iomux_pin_name_t pin, u32 config); + +#endif |