327 lines
11 KiB
C
327 lines
11 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Jeff Epler for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdbool.h>
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#include "shared-bindings/sdioio/SDCard.h"
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#include "py/mperrno.h"
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#include "py/runtime.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/util.h"
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#include "supervisor/board.h"
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#include "common-hal/microcontroller/Pin.h"
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#include "shared-bindings/microcontroller/Pin.h"
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STATIC bool reserved_sdio[MP_ARRAY_SIZE(mcu_sdio_banks)];
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STATIC bool never_reset_sdio[MP_ARRAY_SIZE(mcu_sdio_banks)];
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STATIC const mcu_periph_obj_t *find_pin_function(const mcu_periph_obj_t *table, size_t sz, const mcu_pin_obj_t *pin, int periph_index) {
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for (size_t i = 0; i < sz; i++, table++) {
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if (periph_index == table->periph_index && pin == table->pin) {
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return table;
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}
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}
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return NULL;
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}
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// match pins to SDIO objects
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STATIC int check_pins(sdioio_sdcard_obj_t *self,
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const mcu_pin_obj_t *clock, const mcu_pin_obj_t *command,
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uint8_t num_data, const mcu_pin_obj_t **data) {
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bool sdio_taken = false;
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const uint8_t sdio_clock_len = MP_ARRAY_SIZE(mcu_sdio_clock_list);
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const uint8_t sdio_command_len = MP_ARRAY_SIZE(mcu_sdio_command_list);
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const uint8_t sdio_data0_len = MP_ARRAY_SIZE(mcu_sdio_data0_list);
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const uint8_t sdio_data1_len = MP_ARRAY_SIZE(mcu_sdio_data1_list);
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const uint8_t sdio_data2_len = MP_ARRAY_SIZE(mcu_sdio_data2_list);
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const uint8_t sdio_data3_len = MP_ARRAY_SIZE(mcu_sdio_data3_list);
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// Loop over each possibility for clock. Check whether all other pins can
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// be used on the same peripheral
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for (uint i = 0; i < sdio_clock_len; i++) {
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const mcu_periph_obj_t *mcu_sdio_clock = &mcu_sdio_clock_list[i];
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if (mcu_sdio_clock->pin != clock) {
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continue;
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}
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int periph_index = mcu_sdio_clock->periph_index;
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const mcu_periph_obj_t *mcu_sdio_command = NULL;
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if (!(mcu_sdio_command = find_pin_function(mcu_sdio_command_list, sdio_command_len, command, periph_index))) {
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continue;
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}
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const mcu_periph_obj_t *mcu_sdio_data0 = NULL;
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if (!(mcu_sdio_data0 = find_pin_function(mcu_sdio_data0_list, sdio_data0_len, data[0], periph_index))) {
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continue;
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}
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const mcu_periph_obj_t *mcu_sdio_data1 = NULL;
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if (num_data > 1 && !(mcu_sdio_data1 = find_pin_function(mcu_sdio_data1_list, sdio_data1_len, data[1], periph_index))) {
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continue;
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}
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const mcu_periph_obj_t *mcu_sdio_data2 = NULL;
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if (num_data > 2 && !(mcu_sdio_data2 = find_pin_function(mcu_sdio_data2_list, sdio_data2_len, data[2], periph_index))) {
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continue;
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}
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const mcu_periph_obj_t *mcu_sdio_data3 = NULL;
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if (num_data > 3 && !(mcu_sdio_data3 = find_pin_function(mcu_sdio_data3_list, sdio_data3_len, data[3], periph_index))) {
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continue;
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}
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if (reserved_sdio[periph_index - 1]) {
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sdio_taken = true;
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continue;
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}
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self->clock = mcu_sdio_clock;
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self->command = mcu_sdio_command;
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self->data[0] = mcu_sdio_data0;
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self->data[1] = mcu_sdio_data1;
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self->data[2] = mcu_sdio_data2;
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self->data[3] = mcu_sdio_data3;
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return periph_index;
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}
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if (sdio_taken) {
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mp_raise_ValueError(MP_ERROR_TEXT("Hardware in use, try alternative pins"));
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} else {
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raise_ValueError_invalid_pin();
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}
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}
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void common_hal_sdioio_sdcard_construct(sdioio_sdcard_obj_t *self,
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const mcu_pin_obj_t *clock, const mcu_pin_obj_t *command,
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uint8_t num_data, const mcu_pin_obj_t **data, uint32_t frequency) {
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int periph_index = check_pins(self, clock, command, num_data, data);
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SDIO_TypeDef *SDIOx = mcu_sdio_banks[periph_index - 1];
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GPIO_InitTypeDef GPIO_InitStruct = {0};
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/* Configure data pins */
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for (int i = 0; i < num_data; i++) {
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GPIO_InitStruct.Pin = pin_mask(data[i]->number);
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GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
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GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStruct.Pull = GPIO_PULLUP;
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GPIO_InitStruct.Alternate = self->data[i]->altfn_index;
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HAL_GPIO_Init(pin_port(data[i]->port), &GPIO_InitStruct);
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}
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/* Configure command pin */
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GPIO_InitStruct.Alternate = self->command->altfn_index;
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GPIO_InitStruct.Pin = pin_mask(command->number);
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HAL_GPIO_Init(pin_port(command->port), &GPIO_InitStruct);
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/* Configure clock */
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GPIO_InitStruct.Alternate = self->clock->altfn_index;
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GPIO_InitStruct.Pin = pin_mask(clock->number);
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HAL_GPIO_Init(pin_port(clock->port), &GPIO_InitStruct);
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__HAL_RCC_SDIO_CLK_ENABLE();
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self->handle.Init.ClockDiv = SDIO_TRANSFER_CLK_DIV;
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self->handle.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;
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self->handle.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;
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self->handle.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_DISABLE;
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self->handle.Init.BusWide = SDIO_BUS_WIDE_1B;
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self->handle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
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self->handle.Instance = SDIOx;
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HAL_StatusTypeDef r = HAL_SD_Init(&self->handle);
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if (r != HAL_OK) {
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mp_raise_ValueError_varg(MP_ERROR_TEXT("SDIO Init Error %d"), (int)r);
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}
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HAL_SD_CardInfoTypeDef info;
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r = HAL_SD_GetCardInfo(&self->handle, &info);
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if (r != HAL_OK) {
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mp_raise_ValueError_varg(MP_ERROR_TEXT("SDIO GetCardInfo Error %d"), (int)r);
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}
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self->num_data = 1;
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if (num_data == 4) {
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if ((r = HAL_SD_ConfigWideBusOperation(&self->handle, SDIO_BUS_WIDE_4B)) == HAL_SD_ERROR_NONE) {
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self->handle.Init.BusWide = SDIO_BUS_WIDE_4B;
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self->num_data = 4;
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} else {
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}
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}
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self->capacity = info.BlockNbr * (info.BlockSize / 512);
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self->frequency = 25000000;
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reserved_sdio[periph_index - 1] = true;
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common_hal_mcu_pin_claim(clock);
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common_hal_mcu_pin_claim(command);
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for (int i = 0; i < num_data; i++) {
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common_hal_mcu_pin_claim(data[i]);
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}
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return;
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}
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uint32_t common_hal_sdioio_sdcard_get_count(sdioio_sdcard_obj_t *self) {
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return self->capacity;
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}
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uint32_t common_hal_sdioio_sdcard_get_frequency(sdioio_sdcard_obj_t *self) {
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return self->frequency;
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}
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uint8_t common_hal_sdioio_sdcard_get_width(sdioio_sdcard_obj_t *self) {
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return self->num_data;
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}
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STATIC void check_whole_block(mp_buffer_info_t *bufinfo) {
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if (bufinfo->len % 512) {
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mp_raise_ValueError(MP_ERROR_TEXT("Buffer must be a multiple of 512 bytes"));
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}
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}
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STATIC void wait_write_complete(sdioio_sdcard_obj_t *self) {
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if (self->state_programming) {
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HAL_SD_CardStateTypedef st = HAL_SD_CARD_PROGRAMMING;
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// This waits up to 60s for programming to complete. This seems like
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// an extremely long time, but this is the timeout that micropython's
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// implementation uses
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for (int i = 0; i < 60000 && st == HAL_SD_CARD_PROGRAMMING; i++) {
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st = HAL_SD_GetCardState(&self->handle);
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HAL_Delay(1);
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};
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self->state_programming = false;
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}
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}
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STATIC void check_for_deinit(sdioio_sdcard_obj_t *self) {
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if (common_hal_sdioio_sdcard_deinited(self)) {
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raise_deinited_error();
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}
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}
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int common_hal_sdioio_sdcard_writeblocks(sdioio_sdcard_obj_t *self, uint32_t start_block, mp_buffer_info_t *bufinfo) {
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check_for_deinit(self);
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check_whole_block(bufinfo);
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wait_write_complete(self);
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self->state_programming = true;
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common_hal_mcu_disable_interrupts();
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HAL_StatusTypeDef r = HAL_SD_WriteBlocks(&self->handle, bufinfo->buf, start_block, bufinfo->len / 512, 1000);
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common_hal_mcu_enable_interrupts();
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if (r != HAL_OK) {
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return -EIO;
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}
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return 0;
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}
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int common_hal_sdioio_sdcard_readblocks(sdioio_sdcard_obj_t *self, uint32_t start_block, mp_buffer_info_t *bufinfo) {
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check_for_deinit(self);
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check_whole_block(bufinfo);
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wait_write_complete(self);
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common_hal_mcu_disable_interrupts();
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HAL_StatusTypeDef r = HAL_SD_ReadBlocks(&self->handle, bufinfo->buf, start_block, bufinfo->len / 512, 1000);
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common_hal_mcu_enable_interrupts();
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if (r != HAL_OK) {
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return -EIO;
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}
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return 0;
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}
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bool common_hal_sdioio_sdcard_configure(sdioio_sdcard_obj_t *self, uint32_t frequency, uint8_t bits) {
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check_for_deinit(self);
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return true;
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}
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bool common_hal_sdioio_sdcard_deinited(sdioio_sdcard_obj_t *self) {
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return self->command == NULL;
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}
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STATIC void never_reset_mcu_periph(const mcu_periph_obj_t *periph) {
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if (periph) {
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never_reset_pin_number(periph->pin->port, periph->pin->number);
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}
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}
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STATIC void reset_mcu_periph(const mcu_periph_obj_t *periph) {
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if (periph) {
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reset_pin_number(periph->pin->port, periph->pin->number);
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}
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}
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void common_hal_sdioio_sdcard_deinit(sdioio_sdcard_obj_t *self) {
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if (common_hal_sdioio_sdcard_deinited(self)) {
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return;
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}
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reserved_sdio[self->command->periph_index - 1] = false;
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never_reset_sdio[self->command->periph_index - 1] = false;
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reset_mcu_periph(self->command);
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self->command = NULL;
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reset_mcu_periph(self->clock);
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self->command = NULL;
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for (size_t i = 0; i < MP_ARRAY_SIZE(self->data); i++) {
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reset_mcu_periph(self->data[i]);
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self->data[i] = NULL;
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}
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}
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void common_hal_sdioio_sdcard_never_reset(sdioio_sdcard_obj_t *self) {
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if (common_hal_sdioio_sdcard_deinited(self)) {
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return;
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}
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if (never_reset_sdio[self->command->periph_index] - 1) {
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return;
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}
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never_reset_sdio[self->command->periph_index - 1] = true;
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never_reset_mcu_periph(self->command);
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never_reset_mcu_periph(self->clock);
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for (size_t i = 0; i < MP_ARRAY_SIZE(self->data); i++) {
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never_reset_mcu_periph(self->data[i]);
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}
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}
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void sdioio_reset() {
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for (size_t i = 0; i < MP_ARRAY_SIZE(reserved_sdio); i++) {
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if (!never_reset_sdio[i]) {
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reserved_sdio[i] = false;
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}
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}
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}
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