kopia lustrzana https://github.com/micropython/micropython
462 wiersze
17 KiB
C
462 wiersze
17 KiB
C
/*
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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 <string.h>
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#include "py/nlr.h"
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#include "py/runtime.h"
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#include "lib/oofatfs/ff.h"
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#include "extmod/vfs_fat.h"
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#include "extmod/fsusermount.h"
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#include "mphalport.h"
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#include "sdcard.h"
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#include "pin.h"
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#include "genhdr/pins.h"
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#include "bufhelper.h"
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#include "dma.h"
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#include "irq.h"
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#if MICROPY_HW_HAS_SDCARD
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#if defined(MCU_SERIES_F7) || defined(MCU_SERIES_L4)
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// The F7 & L4 series calls the peripheral SDMMC rather than SDIO, so provide some
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// #defines for backwards compatability.
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#define SDIO SDMMC1
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#define SDIO_CLOCK_EDGE_RISING SDMMC_CLOCK_EDGE_RISING
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#define SDIO_CLOCK_EDGE_FALLING SDMMC_CLOCK_EDGE_FALLING
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#define SDIO_CLOCK_BYPASS_DISABLE SDMMC_CLOCK_BYPASS_DISABLE
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#define SDIO_CLOCK_BYPASS_ENABLE SDMMC_CLOCK_BYPASS_ENABLE
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#define SDIO_CLOCK_POWER_SAVE_DISABLE SDMMC_CLOCK_POWER_SAVE_DISABLE
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#define SDIO_CLOCK_POWER_SAVE_ENABLE SDMMC_CLOCK_POWER_SAVE_ENABLE
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#define SDIO_BUS_WIDE_1B SDMMC_BUS_WIDE_1B
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#define SDIO_BUS_WIDE_4B SDMMC_BUS_WIDE_4B
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#define SDIO_BUS_WIDE_8B SDMMC_BUS_WIDE_8B
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#define SDIO_HARDWARE_FLOW_CONTROL_DISABLE SDMMC_HARDWARE_FLOW_CONTROL_DISABLE
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#define SDIO_HARDWARE_FLOW_CONTROL_ENABLE SDMMC_HARDWARE_FLOW_CONTROL_ENABLE
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#define SDIO_TRANSFER_CLK_DIV SDMMC_TRANSFER_CLK_DIV
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#endif
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// TODO: Since SDIO is fundamentally half-duplex, we really only need to
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// tie up one DMA channel. However, the HAL DMA API doesn't
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// seem to provide a convenient way to change the direction. I believe that
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// its as simple as changing the CR register and the Init.Direction field
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// and make DMA_SetConfig public.
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// TODO: I think that as an optimization, we can allocate these dynamically
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// if an sd card is detected. This will save approx 260 bytes of RAM
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// when no sdcard was being used.
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static SD_HandleTypeDef sd_handle;
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static DMA_HandleTypeDef sd_rx_dma, sd_tx_dma;
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void sdcard_init(void) {
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// invalidate the sd_handle
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sd_handle.Instance = NULL;
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// configure SD GPIO
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// we do this here an not in HAL_SD_MspInit because it apparently
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// makes it more robust to have the pins always pulled high
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// Note: the mp_hal_pin_config function will configure the GPIO in
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// fast mode which can do up to 50MHz. This should be plenty for SDIO
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// which clocks up to 25MHz maximum.
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mp_hal_pin_config(&pin_C8, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, GPIO_AF12_SDIO);
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mp_hal_pin_config(&pin_C9, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, GPIO_AF12_SDIO);
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mp_hal_pin_config(&pin_C10, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, GPIO_AF12_SDIO);
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mp_hal_pin_config(&pin_C11, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, GPIO_AF12_SDIO);
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mp_hal_pin_config(&pin_C12, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, GPIO_AF12_SDIO);
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mp_hal_pin_config(&pin_D2, MP_HAL_PIN_MODE_ALT, MP_HAL_PIN_PULL_UP, GPIO_AF12_SDIO);
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// configure the SD card detect pin
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// we do this here so we can detect if the SD card is inserted before powering it on
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mp_hal_pin_config(&MICROPY_HW_SDCARD_DETECT_PIN, MP_HAL_PIN_MODE_INPUT, MICROPY_HW_SDCARD_DETECT_PULL, 0);
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}
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void HAL_SD_MspInit(SD_HandleTypeDef *hsd) {
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// enable SDIO clock
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__SDIO_CLK_ENABLE();
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// NVIC configuration for SDIO interrupts
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HAL_NVIC_SetPriority(SDIO_IRQn, IRQ_PRI_SDIO, IRQ_SUBPRI_SDIO);
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HAL_NVIC_EnableIRQ(SDIO_IRQn);
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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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HAL_NVIC_DisableIRQ(SDIO_IRQn);
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__SDIO_CLK_DISABLE();
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}
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bool sdcard_is_present(void) {
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return HAL_GPIO_ReadPin(MICROPY_HW_SDCARD_DETECT_PIN.gpio, MICROPY_HW_SDCARD_DETECT_PIN.pin_mask) == MICROPY_HW_SDCARD_DETECT_PRESENT;
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}
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bool sdcard_power_on(void) {
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if (!sdcard_is_present()) {
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return false;
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}
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if (sd_handle.Instance) {
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return true;
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}
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// SD device interface configuration
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sd_handle.Instance = SDIO;
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sd_handle.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;
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sd_handle.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;
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sd_handle.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_ENABLE;
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sd_handle.Init.BusWide = SDIO_BUS_WIDE_1B;
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sd_handle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
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sd_handle.Init.ClockDiv = SDIO_TRANSFER_CLK_DIV;
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// init the SD interface, with retry if it's not ready yet
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HAL_SD_CardInfoTypedef cardinfo;
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for (int retry = 10; HAL_SD_Init(&sd_handle, &cardinfo) != SD_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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// configure the SD bus width for wide operation
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if (HAL_SD_WideBusOperation_Config(&sd_handle, SDIO_BUS_WIDE_4B) != SD_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 true;
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error:
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sd_handle.Instance = NULL;
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return false;
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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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return;
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}
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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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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;
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HAL_SD_Get_CardInfo(&sd_handle, &cardinfo);
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return cardinfo.CardCapacity;
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}
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void SDIO_IRQHandler(void) {
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IRQ_ENTER(SDIO_IRQn);
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HAL_SD_IRQHandler(&sd_handle);
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IRQ_EXIT(SDIO_IRQn);
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}
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mp_uint_t sdcard_read_blocks(uint8_t *dest, uint32_t block_num, 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 SD_ERROR;
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}
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HAL_SD_ErrorTypedef err = SD_OK;
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// check that dest pointer is aligned on a 4-byte boundary
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uint8_t *orig_dest = NULL;
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uint32_t saved_word;
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if (((uint32_t)dest & 3) != 0) {
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// Pointer is not aligned so it needs fixing.
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// We could allocate a temporary block of RAM (as sdcard_write_blocks
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// does) but instead we are going to use the dest buffer inplace. We
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// are going to align the pointer, save the initial word at the aligned
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// location, read into the aligned memory, move the memory back to the
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// unaligned location, then restore the initial bytes at the aligned
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// location. We should have no trouble doing this as those initial
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// bytes at the aligned location should be able to be changed for the
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// duration of this function call.
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orig_dest = dest;
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dest = (uint8_t*)((uint32_t)dest & ~3);
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saved_word = *(uint32_t*)dest;
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}
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if (query_irq() == IRQ_STATE_ENABLED) {
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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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dma_init(&sd_rx_dma, &dma_SDIO_0_RX, &sd_handle);
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sd_handle.hdmarx = &sd_rx_dma;
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// make sure cache is flushed and invalidated so when DMA updates the RAM
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// from reading the peripheral the CPU then reads the new data
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MP_HAL_CLEANINVALIDATE_DCACHE(dest, num_blocks * SDCARD_BLOCK_SIZE);
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err = HAL_SD_ReadBlocks_BlockNumber_DMA(&sd_handle, (uint32_t*)dest, block_num, SDCARD_BLOCK_SIZE, num_blocks);
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if (err == SD_OK) {
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// wait for DMA transfer to finish, with a large timeout
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err = HAL_SD_CheckReadOperation(&sd_handle, 100000000);
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}
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dma_deinit(&dma_SDIO_0_RX);
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sd_handle.hdmarx = NULL;
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restore_irq_pri(basepri);
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} else {
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err = HAL_SD_ReadBlocks_BlockNumber(&sd_handle, (uint32_t*)dest, block_num, SDCARD_BLOCK_SIZE, num_blocks);
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}
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if (orig_dest != NULL) {
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// move the read data to the non-aligned position, and restore the initial bytes
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memmove(orig_dest, dest, num_blocks * SDCARD_BLOCK_SIZE);
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memcpy(dest, &saved_word, orig_dest - dest);
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}
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return err;
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}
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mp_uint_t sdcard_write_blocks(const uint8_t *src, uint32_t block_num, 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 SD_ERROR;
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}
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HAL_SD_ErrorTypedef err = SD_OK;
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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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// pointer is not aligned, so allocate a temporary block to do the write
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uint8_t *src_aligned = m_new_maybe(uint8_t, SDCARD_BLOCK_SIZE);
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if (src_aligned == NULL) {
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return SD_ERROR;
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}
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for (size_t i = 0; i < num_blocks; ++i) {
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memcpy(src_aligned, src + i * SDCARD_BLOCK_SIZE, SDCARD_BLOCK_SIZE);
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err = sdcard_write_blocks(src_aligned, block_num + i, 1);
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if (err != SD_OK) {
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break;
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}
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}
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m_del(uint8_t, src_aligned, SDCARD_BLOCK_SIZE);
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return err;
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}
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if (query_irq() == IRQ_STATE_ENABLED) {
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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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dma_init(&sd_tx_dma, &dma_SDIO_0_TX, &sd_handle);
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sd_handle.hdmatx = &sd_tx_dma;
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// make sure cache is flushed to RAM so the DMA can read the correct data
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MP_HAL_CLEAN_DCACHE(src, num_blocks * SDCARD_BLOCK_SIZE);
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err = HAL_SD_WriteBlocks_BlockNumber_DMA(&sd_handle, (uint32_t*)src, block_num, SDCARD_BLOCK_SIZE, num_blocks);
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if (err == SD_OK) {
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// wait for DMA transfer to finish, with a large timeout
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err = HAL_SD_CheckWriteOperation(&sd_handle, 100000000);
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}
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dma_deinit(&dma_SDIO_0_TX);
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sd_handle.hdmatx = NULL;
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restore_irq_pri(basepri);
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} else {
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err = HAL_SD_WriteBlocks_BlockNumber(&sd_handle, (uint32_t*)src, block_num, SDCARD_BLOCK_SIZE, num_blocks);
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}
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return err;
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}
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/******************************************************************************/
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// Micro Python bindings
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//
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// Expose the SD card as an object with the block protocol.
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// there is a singleton SDCard object
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const mp_obj_base_t pyb_sdcard_obj = {&pyb_sdcard_type};
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STATIC mp_obj_t pyb_sdcard_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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// check arguments
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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// return singleton object
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return (mp_obj_t)&pyb_sdcard_obj;
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}
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STATIC mp_obj_t sd_present(mp_obj_t self) {
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return mp_obj_new_bool(sdcard_is_present());
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(sd_present_obj, sd_present);
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STATIC mp_obj_t sd_power(mp_obj_t self, mp_obj_t state) {
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bool result;
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if (mp_obj_is_true(state)) {
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result = sdcard_power_on();
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} else {
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sdcard_power_off();
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result = true;
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}
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return mp_obj_new_bool(result);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(sd_power_obj, sd_power);
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STATIC mp_obj_t sd_info(mp_obj_t self) {
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if (sd_handle.Instance == NULL) {
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return mp_const_none;
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}
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HAL_SD_CardInfoTypedef cardinfo;
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HAL_SD_Get_CardInfo(&sd_handle, &cardinfo);
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// cardinfo.SD_csd and cardinfo.SD_cid have lots of info but we don't use them
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mp_obj_t tuple[3] = {
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mp_obj_new_int_from_ull(cardinfo.CardCapacity),
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mp_obj_new_int_from_uint(cardinfo.CardBlockSize),
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mp_obj_new_int(cardinfo.CardType),
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};
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return mp_obj_new_tuple(3, tuple);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(sd_info_obj, sd_info);
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// now obsolete, kept for backwards compatibility
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STATIC mp_obj_t sd_read(mp_obj_t self, mp_obj_t block_num) {
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uint8_t *dest = m_new(uint8_t, SDCARD_BLOCK_SIZE);
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mp_uint_t ret = sdcard_read_blocks(dest, mp_obj_get_int(block_num), 1);
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if (ret != 0) {
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m_del(uint8_t, dest, SDCARD_BLOCK_SIZE);
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_Exception, "sdcard_read_blocks failed [%u]", ret));
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}
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return mp_obj_new_bytearray_by_ref(SDCARD_BLOCK_SIZE, dest);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(sd_read_obj, sd_read);
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// now obsolete, kept for backwards compatibility
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STATIC mp_obj_t sd_write(mp_obj_t self, mp_obj_t block_num, mp_obj_t data) {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
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if (bufinfo.len % SDCARD_BLOCK_SIZE != 0) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "writes must be a multiple of %d bytes", SDCARD_BLOCK_SIZE));
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}
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mp_uint_t ret = sdcard_write_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SDCARD_BLOCK_SIZE);
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if (ret != 0) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_Exception, "sdcard_write_blocks failed [%u]", ret));
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_3(sd_write_obj, sd_write);
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STATIC mp_obj_t pyb_sdcard_readblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_WRITE);
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mp_uint_t ret = sdcard_read_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SDCARD_BLOCK_SIZE);
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return mp_obj_new_bool(ret == 0);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_sdcard_readblocks_obj, pyb_sdcard_readblocks);
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STATIC mp_obj_t pyb_sdcard_writeblocks(mp_obj_t self, mp_obj_t block_num, mp_obj_t buf) {
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mp_buffer_info_t bufinfo;
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mp_get_buffer_raise(buf, &bufinfo, MP_BUFFER_READ);
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mp_uint_t ret = sdcard_write_blocks(bufinfo.buf, mp_obj_get_int(block_num), bufinfo.len / SDCARD_BLOCK_SIZE);
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return mp_obj_new_bool(ret == 0);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_sdcard_writeblocks_obj, pyb_sdcard_writeblocks);
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STATIC mp_obj_t pyb_sdcard_ioctl(mp_obj_t self, mp_obj_t cmd_in, mp_obj_t arg_in) {
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mp_int_t cmd = mp_obj_get_int(cmd_in);
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switch (cmd) {
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case BP_IOCTL_INIT:
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if (!sdcard_power_on()) {
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return MP_OBJ_NEW_SMALL_INT(-1); // error
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}
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return MP_OBJ_NEW_SMALL_INT(0); // success
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case BP_IOCTL_DEINIT:
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sdcard_power_off();
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return MP_OBJ_NEW_SMALL_INT(0); // success
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case BP_IOCTL_SYNC:
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// nothing to do
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return MP_OBJ_NEW_SMALL_INT(0); // success
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case BP_IOCTL_SEC_COUNT:
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return MP_OBJ_NEW_SMALL_INT(0); // TODO
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case BP_IOCTL_SEC_SIZE:
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return MP_OBJ_NEW_SMALL_INT(SDCARD_BLOCK_SIZE);
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default: // unknown command
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return MP_OBJ_NEW_SMALL_INT(-1); // error
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}
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_3(pyb_sdcard_ioctl_obj, pyb_sdcard_ioctl);
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STATIC const mp_map_elem_t pyb_sdcard_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_present), (mp_obj_t)&sd_present_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_power), (mp_obj_t)&sd_power_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_info), (mp_obj_t)&sd_info_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&sd_read_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&sd_write_obj },
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// block device protocol
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{ MP_OBJ_NEW_QSTR(MP_QSTR_readblocks), (mp_obj_t)&pyb_sdcard_readblocks_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_writeblocks), (mp_obj_t)&pyb_sdcard_writeblocks_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_ioctl), (mp_obj_t)&pyb_sdcard_ioctl_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(pyb_sdcard_locals_dict, pyb_sdcard_locals_dict_table);
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const mp_obj_type_t pyb_sdcard_type = {
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{ &mp_type_type },
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.name = MP_QSTR_SDCard,
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.make_new = pyb_sdcard_make_new,
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.locals_dict = (mp_obj_t)&pyb_sdcard_locals_dict,
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};
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void sdcard_init_vfs(fs_user_mount_t *vfs) {
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vfs->base.type = &mp_fat_vfs_type;
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vfs->flags |= FSUSER_NATIVE | FSUSER_HAVE_IOCTL;
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vfs->fatfs.drv = vfs;
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vfs->readblocks[0] = (mp_obj_t)&pyb_sdcard_readblocks_obj;
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vfs->readblocks[1] = (mp_obj_t)&pyb_sdcard_obj;
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vfs->readblocks[2] = (mp_obj_t)sdcard_read_blocks; // native version
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vfs->writeblocks[0] = (mp_obj_t)&pyb_sdcard_writeblocks_obj;
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vfs->writeblocks[1] = (mp_obj_t)&pyb_sdcard_obj;
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vfs->writeblocks[2] = (mp_obj_t)sdcard_write_blocks; // native version
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vfs->u.ioctl[0] = (mp_obj_t)&pyb_sdcard_ioctl_obj;
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vfs->u.ioctl[1] = (mp_obj_t)&pyb_sdcard_obj;
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}
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#endif // MICROPY_HW_HAS_SDCARD
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