183 lines
7.2 KiB
C
183 lines
7.2 KiB
C
/*
|
|
* sdmmc_config.c — board-level реализация SDMMC для MIMXRT1052CVJ5B.
|
|
*/
|
|
|
|
#define SD_ENABLED /* нужен для fsl_sd.h, до включений */
|
|
|
|
#include "sdmmc_config.h"
|
|
|
|
#include "fsl_iomuxc.h"
|
|
|
|
/* ---------------------------------------------------------------------------
|
|
* Статические объекты хоста (не экспортируются)
|
|
* ------------------------------------------------------------------------- */
|
|
|
|
/* DMA-дескрипторы: некэшируемая секция, выравнивание по требованию USDHC. */
|
|
AT_NONCACHEABLE_SECTION_ALIGN(
|
|
static uint32_t s_dma_buf[BOARD_SDMMC_HOST_DMA_DESCRIPTOR_BUFFER_SIZE],
|
|
SDMMCHOST_DMA_DESCRIPTOR_BUFFER_ALIGN_SIZE);
|
|
|
|
static sdmmchost_t s_host;
|
|
static sd_detect_card_t s_cd;
|
|
static sd_io_voltage_t s_io_voltage = {
|
|
.type = BOARD_SDMMC_SD_IO_VOLTAGE_TYPE,
|
|
.func = NULL, /* управление через регистры USDHC, не через внешний LDO */
|
|
};
|
|
|
|
/* Debug markers for runtime verification in debugger. */
|
|
volatile uint32_t g_sdmmc_dbg_dma_buf_addr = 0U;
|
|
volatile uint32_t g_sdmmc_dbg_usdhc1_src_clock_hz = 0U;
|
|
|
|
static bool sd_card_detect_gpio(void)
|
|
{
|
|
return GPIO_PinRead(BOARD_SDMMC_SD_CD_GPIO_BASE, BOARD_SDMMC_SD_CD_GPIO_PIN) == BOARD_SDMMC_SD_CD_INSERT_LEVEL;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------
|
|
* Внутренние функции
|
|
* ------------------------------------------------------------------------- */
|
|
|
|
/*
|
|
* Возвращает частоту источника USDHC1.
|
|
*
|
|
* BOARD_BootClockRUN() уже настроил SysPll и PFD0 → не трогаем PLL.
|
|
* Просто возвращаем известное значение из clock_config.h.
|
|
*/
|
|
static uint32_t get_usdhc1_src_clock_hz(void)
|
|
{
|
|
return BOARD_BOOTCLOCKRUN_USDHC1_CLK_ROOT;
|
|
}
|
|
|
|
/*
|
|
* Управление питанием карты: GPIO1[19] (SdPwr), active-high.
|
|
*/
|
|
static void sd_power_control(bool enable)
|
|
{
|
|
#if BOARD_SDMMC_SD_PWR_ACTIVE_HIGH
|
|
GPIO_PinWrite(BOARD_SDMMC_SD_PWR_GPIO_BASE, BOARD_SDMMC_SD_PWR_GPIO_PIN, enable ? 1U : 0U);
|
|
#else
|
|
GPIO_PinWrite(BOARD_SDMMC_SD_PWR_GPIO_BASE, BOARD_SDMMC_SD_PWR_GPIO_PIN, enable ? 0U : 1U);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Инициализация GPIO питания карты как выход, начальное состояние — выкл.
|
|
* Вызывается однократно из BOARD_SD_Config().
|
|
*/
|
|
static void sd_power_init(void)
|
|
{
|
|
const gpio_pin_config_t cfg = {
|
|
.direction = kGPIO_DigitalOutput,
|
|
#if BOARD_SDMMC_SD_PWR_ACTIVE_HIGH
|
|
.outputLogic = 0U, /* питание выключено при старте */
|
|
#else
|
|
.outputLogic = 1U, /* питание выключено при старте */
|
|
#endif
|
|
.interruptMode = kGPIO_NoIntmode,
|
|
};
|
|
GPIO_PinInit(BOARD_SDMMC_SD_PWR_GPIO_BASE, BOARD_SDMMC_SD_PWR_GPIO_PIN, &cfg);
|
|
}
|
|
|
|
/*
|
|
* Динамическая настройка пад-конфигурации линий SD в зависимости от частоты.
|
|
* Вызывается SDMMC стеком при смене скорости (HS, SDR50, SDR104).
|
|
*
|
|
* speed/strength подобраны по таблице EVK — для данной платы проверить
|
|
* при трассировке > 50 MHz.
|
|
*/
|
|
static void sd_pin_config(uint32_t freq)
|
|
{
|
|
uint32_t speed;
|
|
uint32_t strength;
|
|
|
|
if (freq <= 50000000U)
|
|
{
|
|
speed = 0U;
|
|
strength = 7U;
|
|
}
|
|
else if (freq <= 100000000U)
|
|
{
|
|
speed = 2U;
|
|
strength = 7U;
|
|
}
|
|
else
|
|
{
|
|
speed = 3U;
|
|
strength = 7U;
|
|
}
|
|
|
|
const uint32_t pad = IOMUXC_SW_PAD_CTL_PAD_SPEED(speed) | IOMUXC_SW_PAD_CTL_PAD_SRE_MASK |
|
|
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK | IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
|
|
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
|
|
IOMUXC_SW_PAD_CTL_PAD_PUS(1) /* 47k pull-up */
|
|
| IOMUXC_SW_PAD_CTL_PAD_DSE(strength);
|
|
|
|
const uint32_t clk_pad = IOMUXC_SW_PAD_CTL_PAD_SPEED(speed) | IOMUXC_SW_PAD_CTL_PAD_SRE_MASK |
|
|
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK |
|
|
IOMUXC_SW_PAD_CTL_PAD_PUS(0) /* no pull on CLK */
|
|
| IOMUXC_SW_PAD_CTL_PAD_DSE(strength);
|
|
|
|
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_00_USDHC1_CMD, pad);
|
|
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_01_USDHC1_CLK, clk_pad);
|
|
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_02_USDHC1_DATA0, pad);
|
|
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_03_USDHC1_DATA1, pad);
|
|
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_04_USDHC1_DATA2, pad);
|
|
IOMUXC_SetPinConfig(IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3, pad);
|
|
/* CD_B в GPIO-режиме: подтяжка вверх + hysteresis для стабильного уровня. */
|
|
IOMUXC_SetPinConfig(IOMUXC_GPIO_B1_12_GPIO2_IO28,
|
|
IOMUXC_SW_PAD_CTL_PAD_PKE_MASK | IOMUXC_SW_PAD_CTL_PAD_PUE_MASK |
|
|
IOMUXC_SW_PAD_CTL_PAD_HYS_MASK | IOMUXC_SW_PAD_CTL_PAD_PUS(1));
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------------
|
|
* Публичный API
|
|
* ------------------------------------------------------------------------- */
|
|
|
|
#ifdef SD_ENABLED
|
|
void BOARD_SD_Config(void *card, sd_cd_t cd, uint32_t host_irq_priority, void *user_data)
|
|
{
|
|
assert(card != NULL);
|
|
|
|
/* --- host --- */
|
|
s_host.dmaDesBuffer = s_dma_buf;
|
|
s_host.dmaDesBufferWordsNum = BOARD_SDMMC_HOST_DMA_DESCRIPTOR_BUFFER_SIZE;
|
|
s_host.enableCacheControl = BOARD_SDMMC_HOST_CACHE_CONTROL;
|
|
|
|
sd_card_t *sd = (sd_card_t *) card;
|
|
|
|
sd->host = &s_host;
|
|
sd->host->hostController.base = BOARD_SDMMC_SD_HOST_BASEADDR;
|
|
sd->host->hostController.sourceClock_Hz = get_usdhc1_src_clock_hz();
|
|
g_sdmmc_dbg_dma_buf_addr = (uint32_t)(uintptr_t)s_dma_buf;
|
|
g_sdmmc_dbg_usdhc1_src_clock_hz = sd->host->hostController.sourceClock_Hz;
|
|
|
|
/* --- card detect: GPIO CD (active-low) --- */
|
|
s_cd.cdDebounce_ms = BOARD_SDMMC_SD_CD_DEBOUNCE_MS;
|
|
s_cd.type = BOARD_SDMMC_SD_CD_TYPE;
|
|
s_cd.cardDetected = sd_card_detect_gpio;
|
|
s_cd.callback = cd; /* обычно NULL из bsp_sd */
|
|
s_cd.userData = user_data;
|
|
|
|
sd->usrParam.cd = &s_cd;
|
|
sd->usrParam.pwr = sd_power_control;
|
|
sd->usrParam.ioStrength = sd_pin_config;
|
|
sd->usrParam.ioVoltage = &s_io_voltage;
|
|
sd->usrParam.maxFreq = BOARD_SDMMC_SD_HOST_SUPPORT_SDR104_FREQ;
|
|
|
|
/* --- GPIO питания --- */
|
|
sd_power_init();
|
|
/* CD_B: переводим в GPIO2_IO28 и настраиваем вход */
|
|
IOMUXC_SetPinMux(IOMUXC_GPIO_B1_12_GPIO2_IO28, 0U);
|
|
const gpio_pin_config_t cd_cfg = {
|
|
.direction = kGPIO_DigitalInput,
|
|
.outputLogic = 0U,
|
|
.interruptMode = kGPIO_NoIntmode,
|
|
};
|
|
GPIO_PinInit(BOARD_SDMMC_SD_CD_GPIO_BASE, BOARD_SDMMC_SD_CD_GPIO_PIN, &cd_cfg);
|
|
/* Важно: применяем pad-конфиг сразу для ранних CMD (CMD0/CMD8/CMD55/ACMD41). */
|
|
sd_pin_config(400000U);
|
|
|
|
/* --- приоритет прерывания хоста --- */
|
|
NVIC_SetPriority(BOARD_SDMMC_SD_HOST_IRQ, host_irq_priority);
|
|
}
|
|
#endif /* SD_ENABLED */
|