forked from Imagelibrary/rtems
138 lines
4.0 KiB
C
138 lines
4.0 KiB
C
/**
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* @file
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*
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* @ingroup RTEMSBSPsARMTMS570
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*
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* @brief I/O Multiplexing Module (IOMM) basic support
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*/
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/*
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* Copyright (c) 2015 Premysl Houdek <kom541000@gmail.com>
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*
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* Google Summer of Code 2014 at
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* Czech Technical University in Prague
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* Zikova 1903/4
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* 166 36 Praha 6
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* Czech Republic
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifndef LIBBSP_ARM_TMS570_PINMUX_H
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#define LIBBSP_ARM_TMS570_PINMUX_H
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#ifndef ASM
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#include <bsp/tms570.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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#define TMS570_PIN_NUM_SHIFT 0
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#define TMS570_PIN_NUM_MASK 0x000007ff
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/*
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* Request clear of interconnection in setup
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* to ensure that previous peripheral to pin
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* connection is not enabled in parallel to other one.
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* Mask is ored with pin number in such list.
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*/
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#define TMS570_PIN_CLEAR_RQ_MASK 0x00000800
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#define TMS570_PIN_FNC_SHIFT 12
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#define TMS570_PIN_FNC_MASK 0x0000f000
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#define TMS570_PIN_NUM_FNC_MASK 0x0000ffff
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#define TMS570_PIN_IN_ALT_SHIFT 16
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#define TMS570_PIN_IN_ALT_MASK 0xffff0000
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#define TMS570_PIN_FNC_AUTO (-1)
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#define TMS570_PIN_AND_FNC(pin, fnc) \
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((pin) | ((fnc) << TMS570_PIN_FNC_SHIFT))
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#define TMS570_PIN_WITH_IN_ALT(pin_num_and_fnc, pin_in_alt_num_and_fnc) \
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((pin_num_and_fnc) | ((pin_in_alt_num_and_fnc) << TMS570_PIN_IN_ALT_SHIFT))
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#define TMS570_BALL_WITH_MMR(mmrx, pos) \
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((pos) | ((mmrx) << 2))
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/* Generic functions select pin to peripheral connection */
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void tms570_bsp_pin_set_function(int pin_num, int pin_fnc);
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void tms570_bsp_pin_clear_function(int pin_num, int pin_fnc);
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void tms570_bsp_pin_config_one(uint32_t pin_num_and_fnc);
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void tms570_bsp_pinmmr_config(const uint32_t *pinmmr_values, int reg_start, int reg_count);
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static inline void
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tms570_bsp_pin_to_pinmmrx(volatile uint32_t **pinmmrx, unsigned int *pin_shift,
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int pin_num)
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{
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pin_num = (pin_num & TMS570_PIN_NUM_MASK) >> TMS570_PIN_NUM_SHIFT;
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*pinmmrx = &TMS570_IOMM.PINMUX.PINMMR0 + (pin_num >> 2);
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*pin_shift = (pin_num & 0x3)*8;
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}
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#define TMS570_PINMMR_REG_SINGLE_VAL_ACTION(reg, pin) \
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(((((pin) & TMS570_PIN_NUM_MASK) >> 2 != (reg)) || ((pin) & TMS570_PIN_CLEAR_RQ_MASK))? 0: \
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1 << ((((pin) & TMS570_PIN_FNC_MASK) >> TMS570_PIN_FNC_SHIFT) + \
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((pin) & 3) * 8) \
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)
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#define TMS570_PINMMR_REG_VAL_ACTION(reg, pin) \
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TMS570_PINMMR_REG_SINGLE_VAL_ACTION(reg, pin) | \
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((pin) & TMS570_PIN_IN_ALT_MASK? \
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TMS570_PINMMR_REG_SINGLE_VAL_ACTION(reg, (pin) >> TMS570_PIN_IN_ALT_SHIFT ): \
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0) |
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/**
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* Macro which computes value for PINMMRx register from pin list
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* which is defined as macro calling action macro for each pin
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*
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* @param reg PINMMR register number (0 .. 30 for TMS570LS3137)
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* @param pin_list declared as macro with parameters
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* \c per_pin_action and \c common_arg which expands
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* to list of \c per_pin_action(\c common_arg, \c TMS570_BALL_xx_function)
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*
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* @retval number which represents connections which should be enabled
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* in given PINMMR register. Pin setup for other registers than specified
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* are ignored
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*/
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#define TMS570_PINMMR_REG_VAL(reg, pin_list) \
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pin_list(TMS570_PINMMR_REG_VAL_ACTION, reg) 0
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#define TMS570_PINMMR_COMA_LIST_ACTION(reg, pin) \
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(pin),
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/**
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* Macro which generates list of pin and function specification from
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* from pin list which is defined as macro calling action macro for each pin
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*
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* @param pin_list declared as macro with parameters
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* \c per_pin_action and \c common_arg which expands
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* to list of \c per_pin_action(\c common_arg, \c TMS570_BALL_xx_function)
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*
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* @retval list of coma separated pin+function combined values which is terminated by coma
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* at the end
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*/
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#define TMS570_PINMMR_COMA_LIST(pin_list) \
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pin_list(TMS570_PINMMR_COMA_LIST_ACTION, 0)
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#endif
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/** @} */
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* LIBBSP_ARM_TMS570_IRQ_H */
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