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/*
ChibiOS - Copyright (C) 2006..2016 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/**
* @file PIOv1/hal_pal_lld.h
* @brief SAMA PAL low level driver header.
*
* @addtogroup PAL
* @{
*/
#ifndef HAL_PAL_LLD_H
#define HAL_PAL_LLD_H
#if HAL_USE_PAL || defined(__DOXYGEN__)
/*===========================================================================*/
/* Unsupported modes and specific modes */
/*===========================================================================*/
#undef PAL_MODE_RESET
#undef PAL_MODE_UNCONNECTED
#undef PAL_MODE_INPUT
#undef PAL_MODE_INPUT_PULLUP
#undef PAL_MODE_INPUT_PULLDOWN
#undef PAL_MODE_INPUT_ANALOG
#undef PAL_MODE_OUTPUT_PUSHPULL
#undef PAL_MODE_OUTPUT_OPENDRAIN
/**
* @name SAMA-specific I/O mode flags
* @{
*/
#define PAL_SAMA_FUNC_MASK (7U << 0U)
#define PAL_SAMA_FUNC_GPIO (0U << 0U)
#define PAL_SAMA_FUNC_PERIPH_A (1U << 0U)
#define PAL_SAMA_FUNC_PERIPH_B (2U << 0U)
#define PAL_SAMA_FUNC_PERIPH_C (3U << 0U)
#define PAL_SAMA_FUNC_PERIPH_D (4U << 0U)
#define PAL_SAMA_FUNC_PERIPH_E (5U << 0U)
#define PAL_SAMA_FUNC_PERIPH_F (6U << 0U)
#define PAL_SAMA_FUNC_PERIPH_G (7U << 0U)
#define PAL_SAMA_DIR_MASK (1U << 8U)
#define PAL_SAMA_DIR_INPUT (0U << 8U)
#define PAL_SAMA_DIR_OUTPUT (1U << 8U)
#define PAL_SAMA_PUEN_MASK (1U << 9U)
#define PAL_SAMA_PUEN_PULLUP (1U << 9U)
#define PAL_SAMA_PDEN_MASK (1U << 10U)
#define PAL_SAMA_PDEN_PULLDOWN (1U << 10U)
#define PAL_SAMA_IFEN_MASK (1U << 12U)
#define PAL_SAMA_PDEN_INPUTFILTER (1U << 12U)
#define PAL_SAMA_IFSCEN_MASK (1U << 13U)
#define PAL_SAMA_IFSCEN_MCK_2 (0U << 13U)
#define PAL_SAMA_IFSCEN_SLCK_2 (1U << 13U)
#define PAL_SAMA_OPD_MASK (1U << 14U)
#define PAL_SAMA_OPD_PUSHPULL (0U << 14U)
#define PAL_SAMA_OPD_OPENDRAIN (1U << 14U)
#define PAL_SAMA_SCHMITT_MASK (1U << 15U)
#define PAL_SAMA_SCHMITT (1U << 15U)
#define PAL_SAMA_DRVSTR_MASK (3U << 16U)
#define PAL_SAMA_DRVSTR_LO (1U << 16U)
#define PAL_SAMA_DRVSTR_ME (2U << 16U)
#define PAL_SAMA_DRVSTR_HI (3U << 16U)
#define PAL_SAMA_EVTSEL_MASK (7U << 24U)
#define PAL_SAMA_EVTSEL_FALLING (0U << 24U)
#define PAL_SAMA_EVTSEL_RISING (1U << 24U)
#define PAL_SAMA_EVTSEL_BOTH (2U << 24U)
#define PAL_SAMA_EVTSEL_LOW (3U << 24U)
#define PAL_SAMA_EVTSEL_HIGH (4U << 24U)
#define PAL_SAMA_PCFS_MASK (1U << 29U)
#define PAL_SAMA_ICFS_MASK (1U << 30U)
#define PAL_SAMA_CFGR_MASK PAL_SAMA_FUNC_MASK | \
PAL_SAMA_DIR_MASK | \
PAL_SAMA_PUEN_MASK | \
PAL_SAMA_PDEN_MASK | \
PAL_SAMA_IFEN_MASK | \
PAL_SAMA_IFSCEN_MASK | \
PAL_SAMA_OPD_MASK | \
PAL_SAMA_SCHMITT_MASK | \
PAL_SAMA_DRVSTR_MASK
#if SAMA_HAL_IS_SECURE
#define PAL_SAMA_SECURE_MASK (1U << 31U)
#define PAL_SAMA_NON_SECURE (0U << 31U)
#define PAL_SAMA_SECURE (1U << 31U)
#endif /* SAMA_HAL_IS_SECURE */
/**
* @name Standard I/O mode flags
* @{
*/
/**
* @brief Implemented as input.
*/
#define PAL_MODE_RESET (PAL_SAMA_DIR_INPUT | \
PAL_SAMA_SCHMITT)
/**
* @brief Implemented as input with pull-up.
*/
#define PAL_MODE_UNCONNECTED (PAL_SAMA_DIR_INPUT | \
PAL_SAMA_SCHMITT | \
PAL_SAMA_PUEN_PULLUP)
/**
* @brief Regular input high-Z pad.
*/
#define PAL_MODE_INPUT (PAL_SAMA_DIR_INPUT | \
PAL_SAMA_SCHMITT)
/**
* @brief Input pad with weak pull up resistor.
*/
#define PAL_MODE_INPUT_PULLUP (PAL_SAMA_DIR_INPUT | \
PAL_SAMA_SCHMITT | \
PAL_SAMA_PUEN_PULLUP)
/**
* @brief Input pad with weak pull down resistor.
*/
#define PAL_MODE_INPUT_PULLDOWN (PAL_SAMA_DIR_INPUT | \
PAL_SAMA_SCHMITT | \
PAL_SAMA_PUEN_PULLDOWN)
/**
* @brief Analog input mode.
*/
#define PAL_MODE_INPUT_ANALOG PAL_SAMA_DIR_INPUT
/**
* @brief Push-pull output pad.
*/
#define PAL_MODE_OUTPUT_PUSHPULL PAL_SAMA_DIR_OUTPUT
/**
* @brief Open-drain output pad.
*/
#define PAL_MODE_OUTPUT_OPENDRAIN (PAL_SAMA_DIR_OUTPUT | \
PAL_SAMA_OPD_OPENDRAIN)
#if SAMA_HAL_IS_SECURE || defined(__DOXYGEN__)
/**
* @brief Secure pad.
* @note Available only on Secure HAL.
*/
#define PAL_MODE_SECURE PAL_SAMA_SECURE
/**
* @brief Non secure pad.
* @note Available only on Secure HAL.
*/
#define PAL_MODE_NON_SECURE PAL_SAMA_NON_SECURE
#endif
/** @} */
/* Discarded definitions from the Atmel headers, the PAL driver uses its own
definitions in order to have an unified handling for all devices.
Unfortunately the ST headers have no uniform definitions for the same
objects across the various sub-families.*/
#undef PIOA
/**
* @name PIO ports definitions
* @{
*/
#define PIOA ((sama_pio_t *)PIOA_BASE)
#define PIOB ((sama_pio_t *)PIOB_BASE)
#define PIOC ((sama_pio_t *)PIOC_BASE)
#define PIOD ((sama_pio_t *)PIOD_BASE)
/** @} */
/*===========================================================================*/
/* I/O Ports Types and constants. */
/*===========================================================================*/
/**
* @name Port related definitions
* @{
*/
/**
* @brief Width, in bits, of an I/O port.
*/
#define PAL_IOPORTS_WIDTH 32
/**
* @brief Whole port mask.
* @details This macro specifies all the valid bits into a port.
*/
#define PAL_WHOLE_PORT ((ioportmask_t)0xFFFF)
/** @} */
/**
* @name Line handling macros
* @{
*/
/**
* @brief Forms a line identifier.
* @details A port/pad pair are encoded into an @p ioline_t type. The encoding
* of this type is platform-dependent.
* @note In this driver the pad number is encoded in the lower 5 bits of
* the PIO address which are guaranteed to be zero.
*/
#define PAL_LINE(port, pad) \
((ioline_t)((uint32_t)(port)) | ((uint32_t)(pad)))
/**
* @brief Decodes a port identifier from a line identifier.
*/
#define PAL_PORT(line) \
((sama_pio_t *)(((uint32_t)(line)) & 0xFFFFFFE0U))
/**
* @brief Decodes a pad identifier from a line identifier.
*/
#define PAL_PAD(line) \
((uint32_t)((uint32_t)(line) & 0x0000001FU))
/**
* @brief Value identifying an invalid line.
*/
#define PAL_NOLINE 0U
/** @} */
/**
* @brief SAMA PIO registers block.
*/
#if SAMA_HAL_IS_SECURE
typedef struct {
volatile uint32_t MSKR;
volatile uint32_t CFGR;
volatile uint32_t PDSR;
volatile uint32_t LOCKSR;
volatile uint32_t SODR;
volatile uint32_t CODR;
volatile uint32_t ODSR;
volatile uint32_t Reserved1;
volatile uint32_t IER;
volatile uint32_t IDR;
volatile uint32_t IMR;
volatile uint32_t ISR;
volatile uint32_t SIONR;
volatile uint32_t SIOSR;
volatile uint32_t IOSSR;
volatile uint32_t IOFR;
} sama_pio_t;
#else
typedef struct {
volatile uint32_t MSKR;
volatile uint32_t CFGR;
volatile uint32_t PDSR;
volatile uint32_t LOCKSR;
volatile uint32_t SODR;
volatile uint32_t CODR;
volatile uint32_t ODSR;
volatile uint32_t Reserved1;
volatile uint32_t IER;
volatile uint32_t IDR;
volatile uint32_t IMR;
volatile uint32_t ISR;
volatile uint32_t Reserved2[3];
volatile uint32_t IOFR;
} sama_pio_t;
#endif
/**
* @brief SAMA PIO static initializer.
* @details It is a dummy.
*/
typedef uint32_t PALConfig;
/**
* @brief Type of digital I/O port sized unsigned integer.
*/
typedef uint32_t ioportmask_t;
/**
* @brief Type of digital I/O modes.
*/
typedef uint32_t iomode_t;
/**
* @brief Type of an I/O line.
*/
typedef uint32_t ioline_t;
/**
* @brief Type of an event mode.
*/
typedef uint32_t ioeventmode_t;
/**
* @brief Type of a port Identifier.
* @details This type can be a scalar or some kind of pointer, do not make
* any assumption about it, use the provided macros when populating
* variables of this type.
*/
typedef sama_pio_t * ioportid_t;
/**
* @brief Type of an pad identifier.
*/
typedef uint32_t iopadid_t;
/*===========================================================================*/
/* I/O Ports Identifiers. */
/* The low level driver wraps the definitions already present in the SAMA */
/* firmware library. */
/*===========================================================================*/
/**
* @brief PIO port A identifier.
*/
#if SAMA_HAS_PIOA || defined(__DOXYGEN__)
#define IOPORT1 PIOA
#endif
/**
* @brief PIO port B identifier.
*/
#if SAMA_HAS_PIOB || defined(__DOXYGEN__)
#define IOPORT2 PIOB
#endif
/**
* @brief PIO port C identifier.
*/
#if SAMA_HAS_PIOC || defined(__DOXYGEN__)
#define IOPORT3 PIOC
#endif
/**
* @brief PIO port D identifier.
*/
#if SAMA_HAS_PIOD || defined(__DOXYGEN__)
#define IOPORT4 PIOD
#endif
/*===========================================================================*/
/* Implementation, some of the following macros could be implemented as */
/* functions, if so please put them in pal_lld.c. */
/*===========================================================================*/
/**
* @brief PIO ports subsystem initialization.
*
* @notapi
*/
#define pal_lld_init(config)
/**
* @brief Reads an I/O port.
* @details This function is implemented by reading the PIO PDSR register, the
* implementation has no side effects.
* @note This function is not meant to be invoked directly by the application
* code.
*
* @param[in] port port identifier
* @return The port bits.
*
* @notapi
*/
#define pal_lld_readport(port) ((port)->PDSR)
/**
* @brief Reads the output latch.
* @details This function is implemented by reading the PIO ODSR register, the
* implementation has no side effects.
* @note This function is not meant to be invoked directly by the application
* code.
*
* @param[in] port port identifier
* @return The latched logical states.
*
* @notapi
*/
#define pal_lld_readlatch(port) ((port)->ODSR)
/**
* @brief Writes on a I/O port.
* @details This function is implemented by writing the PIO ODR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] bits bits to be written on the specified port
*
* @notapi
*/
#define pal_lld_writeport(port, bits) \
do { \
(port)->MSKR = 0xFFFFFFFFU; \
(port)->ODSR = (bits); \
} while (false)
/**
* @brief Sets a bits mask on a I/O port.
* @details This function is implemented by writing the PIO BSRR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] bits bits to be ORed on the specified port
*
* @notapi
*/
#define pal_lld_setport(port, bits) ((port)->SODR = (bits))
/**
* @brief Clears a bits mask on a I/O port.
* @details This function is implemented by writing the PIO BSRR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] bits bits to be cleared on the specified port
*
* @notapi
*/
#define pal_lld_clearport(port, bits) ((port)->CODR = (bits))
/**
* @brief Writes a group of bits.
* @details This function is implemented by writing the PIO BSRR register, the
* implementation has no side effects.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset the group bit offset within the port
* @param[in] bits bits to be written. Values exceeding the group
* width are masked.
*
* @notapi
*/
#define pal_lld_writegroup(port, mask, offset, bits) \
do { \
(port)->MSKR = ((mask) << (offset)); \
(port)->ODSR = (((bits) & (mask)) << (offset)); \
} while (false)
/**
* @brief Pads group mode setup.
* @details This function programs a pads group belonging to the same port
* with the specified mode.
*
* @param[in] port port identifier
* @param[in] mask group mask
* @param[in] offset group bit offset within the port
* @param[in] mode group mode
*
* @notapi
*/
#define pal_lld_setgroupmode(port, mask, offset, mode) \
_pal_lld_setgroupmode(port, mask << offset, mode)
/**
* @brief Writes a logical state on an output pad.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
* @param[in] bit logical value, the value must be @p PAL_LOW or
* @p PAL_HIGH
*
* @notapi
*/
#define pal_lld_writepad(port, pad, bit) pal_lld_writegroup(port, 1, pad, bit)
/**
* @brief Pad event enable.
* @note Programming an unknown or unsupported mode is silently ignored.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
* @param[in] mode pad event mode
*
* @notapi
*/
#define pal_lld_enablepadevent(port, pad, mode)
/**
* @brief Pad event disable.
* @details This function disables previously programmed event callbacks.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
*
* @notapi
*/
#define pal_lld_disablepadevent(port, pad)
/**
* @brief Returns a PAL event structure associated to a pad.
*
* @param[in] port port identifier
* @param[in] pad pad number within the port
*
* @notapi
*/
#define pal_lld_get_pad_event(port, pad)
/**
* @brief Returns a PAL event structure associated to a line.
*
* @param[in] line line identifier
*
* @notapi
*/
#define pal_lld_get_line_event(line)
#ifdef __cplusplus
extern "C" {
#endif
void _pal_lld_setgroupmode(ioportid_t port,
ioportmask_t mask,
iomode_t mode);
#ifdef __cplusplus
}
#endif
#endif /* HAL_USE_PAL */
#endif /* HAL_PAL_LLD_H */
/** @} */
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