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341 lines
11 KiB
341 lines
11 KiB
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* This file is part of the Micro Python 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) 2013, 2014 Damien P. George
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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 STM32_HAL_H
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#include TREZOR_BOARD
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#include <string.h>
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#include "irq.h"
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#include "sdcard.h"
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#include "supervise.h"
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#define SDMMC_CLK_ENABLE() __HAL_RCC_SDMMC1_CLK_ENABLE()
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#define SDMMC_CLK_DISABLE() __HAL_RCC_SDMMC1_CLK_DISABLE()
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#define SDMMC_IRQn SDMMC1_IRQn
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static SD_HandleTypeDef sd_handle = {0};
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// this function is inspired by functions in stm32f4xx_ll_sdmmc.c
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uint32_t SDMMC_CmdSetClrCardDetect(SDMMC_TypeDef *SDMMCx, uint32_t Argument) {
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SDMMC_CmdInitTypeDef sdmmc_cmdinit = {0};
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uint32_t errorstate = SDMMC_ERROR_NONE;
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sdmmc_cmdinit.Argument = (uint32_t)Argument;
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sdmmc_cmdinit.CmdIndex = SDMMC_CMD_SD_APP_SET_CLR_CARD_DETECT;
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sdmmc_cmdinit.Response = SDMMC_RESPONSE_SHORT;
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sdmmc_cmdinit.WaitForInterrupt = SDMMC_WAIT_NO;
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sdmmc_cmdinit.CPSM = SDMMC_CPSM_ENABLE;
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SDMMC_SendCommand(SDMMCx, &sdmmc_cmdinit);
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errorstate = SDMMC_GetCmdResp1(SDMMCx, SDMMC_CMD_SD_APP_SET_CLR_CARD_DETECT,
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SDMMC_CMDTIMEOUT);
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return errorstate;
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}
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static inline void sdcard_default_pin_state(void) {
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HAL_GPIO_WritePin(SD_ENABLE_PORT, SD_ENABLE_PIN, GPIO_PIN_SET); // SD_ON
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HAL_GPIO_WritePin(GPIOC, GPIO_PIN_8, GPIO_PIN_RESET); // SD_DAT0/PC8
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HAL_GPIO_WritePin(GPIOC, GPIO_PIN_9, GPIO_PIN_RESET); // SD_DAT1/PC9
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HAL_GPIO_WritePin(GPIOC, GPIO_PIN_10, GPIO_PIN_RESET); // SD_DAT2/PC10
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HAL_GPIO_WritePin(GPIOC, GPIO_PIN_11, GPIO_PIN_RESET); // SD_DAT3/PC11
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HAL_GPIO_WritePin(GPIOC, GPIO_PIN_12, GPIO_PIN_RESET); // SD_CLK/PC12
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HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_RESET); // SD_CMD/PD2
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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// configure the SD card circuitry on/off pin
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GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStructure.Pin = SD_ENABLE_PIN;
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HAL_GPIO_Init(SD_ENABLE_PORT, &GPIO_InitStructure);
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// configure SD GPIO
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GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStructure.Pin =
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GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = GPIO_PIN_2;
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HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
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// configure the SD card detect pin
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GPIO_InitStructure.Mode = GPIO_MODE_INPUT;
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GPIO_InitStructure.Pull = GPIO_PULLUP;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
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GPIO_InitStructure.Pin = SD_DETECT_PIN;
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HAL_GPIO_Init(SD_DETECT_PORT, &GPIO_InitStructure);
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}
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static inline void sdcard_active_pin_state(void) {
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HAL_GPIO_WritePin(SD_ENABLE_PORT, SD_ENABLE_PIN, GPIO_PIN_RESET);
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HAL_Delay(10); // we need to wait until the circuit fully kicks-in
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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// configure SD GPIO
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GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStructure.Pull = GPIO_PULLUP;
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GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_MEDIUM;
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GPIO_InitStructure.Alternate = GPIO_AF12_SDMMC1;
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GPIO_InitStructure.Pin =
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GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
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HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
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GPIO_InitStructure.Pin = GPIO_PIN_2;
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HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
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}
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void sdcard_init(void) { sdcard_default_pin_state(); }
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void HAL_SD_MspInit(SD_HandleTypeDef *hsd) {
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if (hsd->Instance == sd_handle.Instance) {
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// enable SDIO clock
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SDMMC_CLK_ENABLE();
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// NVIC configuration for SDIO interrupts
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svc_setpriority(SDMMC_IRQn, IRQ_PRI_SDIO);
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svc_enableIRQ(SDMMC_IRQn);
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}
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// GPIO have already been initialised by sdcard_init
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}
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void HAL_SD_MspDeInit(SD_HandleTypeDef *hsd) {
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if (hsd->Instance == sd_handle.Instance) {
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svc_disableIRQ(SDMMC_IRQn);
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SDMMC_CLK_DISABLE();
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}
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}
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secbool sdcard_power_on(void) {
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if (sectrue != sdcard_is_present()) {
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return secfalse;
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}
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if (sd_handle.Instance) {
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return sectrue;
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}
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// turn on SD card circuitry
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sdcard_active_pin_state();
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HAL_Delay(50);
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// SD device interface configuration
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sd_handle.Instance = SDMMC1;
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sd_handle.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;
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sd_handle.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_ENABLE;
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sd_handle.Init.BusWide = SDMMC_BUS_WIDE_1B;
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sd_handle.Init.HardwareFlowControl = SDMMC_HARDWARE_FLOW_CONTROL_DISABLE;
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sd_handle.Init.ClockDiv = 0;
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// init the SD interface, with retry if it's not ready yet
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for (int retry = 10; HAL_SD_Init(&sd_handle) != HAL_OK; retry--) {
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if (retry == 0) {
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goto error;
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}
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HAL_Delay(50);
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}
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// disable the card's internal CD/DAT3 card detect pull-up resistor
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// to send ACMD42, we have to send CMD55 (APP_CMD) with the card's RCA as
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// the argument followed by CMD42 (SET_CLR_CARD_DETECT)
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if (SDMMC_CmdAppCommand(sd_handle.Instance, sd_handle.SdCard.RelCardAdd
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<< 16U) != SDMMC_ERROR_NONE) {
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goto error;
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}
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if (SDMMC_CmdSetClrCardDetect(sd_handle.Instance, 0) != SDMMC_ERROR_NONE) {
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goto error;
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}
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// configure the SD bus width for wide operation
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if (HAL_SD_ConfigWideBusOperation(&sd_handle, SDMMC_BUS_WIDE_4B) != HAL_OK) {
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HAL_SD_DeInit(&sd_handle);
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goto error;
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}
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return sectrue;
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error:
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sdcard_power_off();
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return secfalse;
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}
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void sdcard_power_off(void) {
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if (sd_handle.Instance) {
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HAL_SD_DeInit(&sd_handle);
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sd_handle.Instance = NULL;
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}
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// turn off SD card circuitry
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HAL_Delay(50);
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sdcard_default_pin_state();
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HAL_Delay(100);
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}
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secbool sdcard_is_present(void) {
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return sectrue *
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(GPIO_PIN_RESET == HAL_GPIO_ReadPin(SD_DETECT_PORT, SD_DETECT_PIN));
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}
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uint64_t sdcard_get_capacity_in_bytes(void) {
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if (sd_handle.Instance == NULL) {
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return 0;
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}
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HAL_SD_CardInfoTypeDef cardinfo = {0};
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HAL_SD_GetCardInfo(&sd_handle, &cardinfo);
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return (uint64_t)cardinfo.LogBlockNbr * (uint64_t)cardinfo.LogBlockSize;
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}
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void SDMMC1_IRQHandler(void) {
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IRQ_ENTER(SDIO_IRQn);
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if (sd_handle.Instance) {
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HAL_SD_IRQHandler(&sd_handle);
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}
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IRQ_EXIT(SDIO_IRQn);
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}
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static void sdcard_reset_periph(void) {
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// Fully reset the SDMMC peripheral before calling HAL SD DMA functions.
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// (There could be an outstanding DTIMEOUT event from a previous call and the
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// HAL function enables IRQs before fully configuring the SDMMC peripheral.)
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SDMMC1->DTIMER = 0;
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SDMMC1->DLEN = 0;
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SDMMC1->DCTRL = 0;
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SDMMC1->ICR = SDMMC_STATIC_FLAGS;
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}
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static HAL_StatusTypeDef sdcard_wait_finished(SD_HandleTypeDef *sd,
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uint32_t timeout) {
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// Wait for HAL driver to be ready (eg for DMA to finish)
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uint32_t start = HAL_GetTick();
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for (;;) {
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// Do an atomic check of the state; WFI will exit even if IRQs are disabled
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uint32_t irq_state = disable_irq();
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if (sd->State != HAL_SD_STATE_BUSY) {
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enable_irq(irq_state);
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break;
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}
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__WFI();
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enable_irq(irq_state);
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if (HAL_GetTick() - start >= timeout) {
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return HAL_TIMEOUT;
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}
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}
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// Wait for SD card to complete the operation
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for (;;) {
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HAL_SD_CardStateTypeDef state = HAL_SD_GetCardState(sd);
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if (state == HAL_SD_CARD_TRANSFER) {
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return HAL_OK;
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}
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if (!(state == HAL_SD_CARD_SENDING || state == HAL_SD_CARD_RECEIVING ||
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state == HAL_SD_CARD_PROGRAMMING)) {
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return HAL_ERROR;
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}
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if (HAL_GetTick() - start >= timeout) {
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return HAL_TIMEOUT;
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}
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__WFI();
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}
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return HAL_OK;
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}
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secbool sdcard_read_blocks(uint32_t *dest, uint32_t block_num,
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uint32_t num_blocks) {
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return secfalse;
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}
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// check that dest pointer is aligned on a 4-byte boundary
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if (((uint32_t)dest & 3) != 0) {
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return secfalse;
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}
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HAL_StatusTypeDef err = HAL_OK;
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// we must disable USB irqs to prevent MSC contention with SD card
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uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
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sdcard_reset_periph();
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err =
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HAL_SD_ReadBlocks_DMA(&sd_handle, (uint8_t *)dest, block_num, num_blocks);
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if (err == HAL_OK) {
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err = sdcard_wait_finished(&sd_handle, 5000);
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}
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restore_irq_pri(basepri);
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return sectrue * (err == HAL_OK);
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}
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secbool sdcard_write_blocks(const uint32_t *src, uint32_t block_num,
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uint32_t num_blocks) {
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// check that SD card is initialised
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if (sd_handle.Instance == NULL) {
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return secfalse;
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}
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// check that src pointer is aligned on a 4-byte boundary
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if (((uint32_t)src & 3) != 0) {
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return secfalse;
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}
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HAL_StatusTypeDef err = HAL_OK;
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// we must disable USB irqs to prevent MSC contention with SD card
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uint32_t basepri = raise_irq_pri(IRQ_PRI_OTG_FS);
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sdcard_reset_periph();
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err =
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HAL_SD_WriteBlocks_DMA(&sd_handle, (uint8_t *)src, block_num, num_blocks);
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if (err == HAL_OK) {
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err = sdcard_wait_finished(&sd_handle, 5000);
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}
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restore_irq_pri(basepri);
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return sectrue * (err == HAL_OK);
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}
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