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arch/arm/src/imxrt/imxrt_usdhc.c: Initial commit of the i.MXRT SDHC driver. This driver is partially functional, working in PIO mode. DMA support and additional testing are needed.
This commit is contained in:
Dave Marples
committed by
Gregory Nutt
Gregory Nutt
parent
efbeac79e8
commit
ae054b93bb
@@ -272,6 +272,13 @@ config IMXRT_SNVS_HPRTC
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bool "HP RTC"
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default n
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config IMXRT_USDHC
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bool "USDHC"
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default n
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select ARCH_HAVE_SDIO
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---help---
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Support SD host controller
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endmenu # i.MX RT Peripheral Selection
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menuconfig IMXRT_GPIO_IRQ
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@@ -508,6 +515,26 @@ config IMXRT_SRAM_HEAPOFFSET
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endmenu # i.MX6 Primary RAM
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endmenu # Memory Configuration
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menu "USDHC Configuration"
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depends on IMXRT_USDHC
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config IMXRT_USDHC_DMA
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bool "Support DMA data transfers"
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default y
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select SDIO_DMA
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---help---
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Support DMA data transfers.
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Enable SD card DMA data transfers. This is marginally optional.
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For most usages, SD accesses will cause data overruns if used without
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DMA.
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config IMXRT_USDHC_WIDTH_D1_ONLY
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bool "Use D1 only"
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default n
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---help---
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Select 1-bit transfer mode. Default: 4-bit transfer mode.
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endmenu # USDHC Configuration
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menu "eDMA Configuration"
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depends on IMXRT_EDMA
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@@ -120,6 +120,10 @@ ifeq ($(CONFIG_IMXRT_EDMA),y)
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CHIP_CSRCS += imxrt_edma.c
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endif
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ifdef CONFIG_IMXRT_USDHC
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CHIP_CSRCS += imxrt_usdhc.c
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endif
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ifeq ($(CONFIG_IMXRT_SNVS_LPSRTC),y)
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CHIP_CSRCS += imxrt_lpsrtc.c
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CHIP_CSRCS += imxrt_hprtc.c
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File diff suppressed because it is too large
Load Diff
@@ -228,5 +228,21 @@ void imxrt_clockconfig(void)
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putreg32(reg, IMXRT_CCM_CBCMR);
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#endif
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#ifdef CONFIG_IMXRT_USDHC
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/* Set USDHC1 & 2 to generate clocks from PPL2 PFD2 (396 MHz) */
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reg = getreg32(IMXRT_CCM_CSCMR1);
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reg &= CCM_CSCMR1_USDHC1_CLK_SEL | CCM_CSCMR1_USDHC2_CLK_SEL;
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reg |= CCM_CSCMR1_USDHC1_CLK_SEL_PLL2_PFD0 | CCM_CSCMR1_USDHC2_CLK_SEL_PLL2_PFD0;
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putreg32(reg, IMXRT_CCM_CSCMR1);
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/* Now divide down clocks by 2 ( --> 198 MHz) */
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reg = getreg32(IMXRT_CCM_CSCDR1);
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reg &= CCM_CSCDR1_USDHC1_PODF_MASK | CCM_CSCDR1_USDHC2_PODF_MASK;
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reg |= CCM_CSCDR1_USDHC1_PODF(1) | CCM_CSCDR1_USDHC2_PODF(1);
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putreg32(reg, IMXRT_CCM_CSCDR1);
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#endif
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#endif
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}
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,70 @@
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/****************************************************************************
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* arch/arm/src/imxrt/imxrt_usdhc.h
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*
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* Copyright (C) 2018 Gregory Nutt. All rights reserved.
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* Author: Ivan Ucherdzhiev <ivanucherdjiev@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_IMXRT_IMX_USDHC_H
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#define __ARCH_ARM_SRC_IMXRT_IMX_USDHC_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/sdio.h>
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#include <nuttx/mmcsd.h>
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#include "chip.h"
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#include "chip/imxrt_usdhc.h"
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: imxrt_usdhc_initialize
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*
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* Description:
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* Initialize USDHC for operation.
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*
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* Input Parameters:
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* slotno - Not used.
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*
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* Returned Value:
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* A reference to an USDIO interface structure. NULL is returned on failures.
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*
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****************************************************************************/
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FAR struct sdio_dev_s *imxrt_usdhc_initialize(int slotno);
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#endif /*__ARCH_ARM_SRC_IMXRT_IMX_USDHC_H */
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@@ -161,6 +161,39 @@
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#define BUTTON_SW8_BIT (1 << BUTTON_SW8)
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/* SDIO *****************************************************************************/
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/* Pin drive characteristics - drive strength in particular may need tuning for specific boards */
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#define PADCTL_USDHC1_DATAX (PADCTL_SRE|PADCTL_DSE_60OHM|PADCTL_HYS)
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#define PADCTL_USDHC1_CMD PADCTL_USDHC1_DATAX
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#define PADCTL_USDHC1_CLK (PADCTL_SRE|PADCTL_DSE_60OHM|PADCTL_SPEED_MAX)
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#define PADCTL_USDHC1_CD (0)
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#define PIN_USDHC1_D0 GPIO_USDHC1_DATA0
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#define PIN_USDHC1_D1 GPIO_USDHC1_DATA1
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#define PIN_USDHC1_D2 GPIO_USDHC1_DATA2
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#define PIN_USDHC1_D3 GPIO_USDHC1_DATA3
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#define PIN_USDHC1_DCLK GPIO_USDHC1_CLK
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#define PIN_USDHC1_CMD GPIO_USDHC1_CMD
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#define PIN_USDHC1_CD GPIO_USDHC1_CD_2
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/* 386 KHz for initial inquiry stuff */
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#define BOARD_USDHC_IDMODE_PRESCALER USDHC_SYSCTL_SDCLKFS_DIV256
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#define BOARD_USDHC_IDMODE_DIVISOR USDHC_SYSCTL_DVS_DIV(2)
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/* 24.8MHz for other modes */
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#define BOARD_USDHC_MMCMODE_PRESCALER USDHC_SYSCTL_SDCLKFS_DIV8
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#define BOARD_USDHC_MMCMODE_DIVISOR USDHC_SYSCTL_DVS_DIV(1)
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#define BOARD_USDHC_SD1MODE_PRESCALER USDHC_SYSCTL_SDCLKFS_DIV8
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#define BOARD_USDHC_SD1MODE_DIVISOR USDHC_SYSCTL_DVS_DIV(1)
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#define BOARD_USDHC_SD4MODE_PRESCALER USDHC_SYSCTL_SDCLKFS_DIV8
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#define BOARD_USDHC_SD4MODE_DIVISOR USDHC_SYSCTL_DVS_DIV(1)
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/* PIO Disambiguation ***************************************************************/
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/* LPUARTs
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*
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@@ -48,6 +48,10 @@
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#include <imxrt_lpi2c.h>
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#include <imxrt_lpspi.h>
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#ifdef CONFIG_IMXRT_USDHC
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# include "imxrt_usdhc.h"
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#endif
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#include "imxrt1050-evk.h"
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#include <arch/board/board.h> /* Must always be included last */
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@@ -91,6 +95,37 @@ static void imxrt_i2c_register(int bus)
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}
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#endif
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#ifdef CONFIG_IMXRT_USDHC
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static int nsh_sdmmc_initialize(void)
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{
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struct sdio_dev_s *sdmmc;
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int ret = 0;
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/* Get an instance of the SDIO interface */
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sdmmc = imxrt_usdhc_initialize(0);
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if (!sdmmc)
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{
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syslog(LOG_ERR, "ERROR: Failed to initialize SD/MMC\n");
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}
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else
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{
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/* Bind the SDIO interface to the MMC/SD driver */
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ret = mmcsd_slotinitialize(0, sdmmc);
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if (ret != OK)
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{
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syslog(LOG_ERR,
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"ERROR: Failed to bind SDIO to the MMC/SD driver: %d\n",
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ret);
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}
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}
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return OK;
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}
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#else
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# define nsh_sdmmc_initialize() (OK)
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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@@ -126,6 +161,12 @@ int imxrt_bringup(void)
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imxrt_i2c_register(1);
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#endif
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#ifdef CONFIG_IMXRT_USDHC
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/* Initialize SDHC-base MMC/SD card support */
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nsh_sdmmc_initialize();
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#endif
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#ifdef CONFIG_MMCSD_SPI
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/* Initialize SPI-based MMC/SD card support */
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