sw/device/lib/testing/pinmux_testutils.h

/*
 * Copyright 2023 Google LLC
 * Copyright lowRISC contributors
 *
 * 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.
 */


#ifndef SW_DEVICE_LIB_TESTING_PINMUX_TESTUTILS_H_
#define SW_DEVICE_LIB_TESTING_PINMUX_TESTUTILS_H_

#include <stdint.h>

#include "sw/device/lib/dif/dif_gpio.h"
#include "sw/device/lib/dif/dif_pinmux.h"

/**
 * Default pinmux initialization.
 *
 * Initializes GPIOs to map to the lowest-numbered MIOs, except where it
 * conflicts with UARTs. Then initializes 2 UART mappings to (IOC3,IOC10) and
 * (IOC4,IOC10), denoted as (RX pin,TX pin).
 *
 * This function is specific to top_matcha
 */
void pinmux_testutils_init(dif_pinmux_t *pinmux);

extern const dif_pinmux_index_t kPinmuxTestutilsGpioInselPins[kDifGpioNumPins];
extern const dif_pinmux_index_t kPinmuxTestutilsGpioMioOutPins[kDifGpioNumPins];

/**
 * Returns the mask of testable GPIO pins.
 *
 * Returns a simulation-device-specific mask that enables testing of only a
 * subset of GPIOs depending on the IO allocation limitations.
 */
uint32_t pinmux_testutils_get_testable_gpios_mask(void);

/**
 * A convenience struct to associate pad attributes with a specific pad.
 */
typedef struct pinmux_pad_attributes {
  dif_pinmux_index_t pad;
  dif_pinmux_pad_kind_t kind;
  dif_pinmux_pad_attr_flags_t flags;
} pinmux_pad_attributes_t;

/**
 * Configures several pad attributes.
 */
void pinmux_testutils_configure_pads(const dif_pinmux_t *pinmux,
                                     const pinmux_pad_attributes_t *attrs,
                                     size_t num_attrs);

/**
 * Configures several Matcha peripherals
 */
dif_result_t pinmux_testutils_configure_i2s_tx(const dif_pinmux_t *pinmux);
dif_result_t pinmux_testutils_configure_i2s_rx(const dif_pinmux_t *pinmux);
dif_result_t pinmux_testutils_configure_cam_i2c(const dif_pinmux_t *pinmux);
dif_result_t pinmux_testutils_configure_isp_wrapper(const dif_pinmux_t *pinmux);
dif_result_t pinmux_testutils_configure_cam_ctrl(const dif_pinmux_t *pinmux);

#endif  // SW_DEVICE_LIB_TESTING_PINMUX_TESTUTILS_H_