i.MX6: Divide ported i.MX1/L CSPI header file into two header files
This commit is contained in:
Gregory Nutt
parent
13b53d87a9
commit
16cb0a9205
@ -33,18 +33,15 @@
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_IMX6_ECSPI_H
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#define __ARCH_ARM_IMX6_ECSPI_H
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#ifndef __ARCH_ARM_IMX6_CHIP_ECSPI_H
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#define __ARCH_ARM_IMX6_CHIP_ECSPI_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#ifndef __ASSEMBLY__
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# include <stdint.h>
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# include <stdbool.h>
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# include <nuttx/spi/spi.h>
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#endif
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#include <nuttx/config.h>
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#include "chip/imx_memorymap.h"
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/************************************************************************************
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* Pre-processor Definitions
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@ -52,83 +49,83 @@
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/* ECSPI Register Offsets ***********************************************************/
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#define ECSPI_RXDATA_OFFSET 0x0000 /* Receive Data Register */
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#define ECSPI_TXDATA_OFFSET 0x0004 /* Transmit Data Register */
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#define ECSPI_CONREG_OFFSET 0x0008 /* Control Register */
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#define ECSPI_CONFIGREG_OFFSET 0x000c /* Configuration Register */
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#define ECSPI_INTREG_OFFSET 0x0010 /* Interrupt Control Register */
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#define ECSPI_DMAREG_OFFSET 0x0014 /* DMA Control Register */
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#define ECSPI_STATREG_OFFSET 0x0018 /* Status Register */
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#define ECSPI_PERIODREG_OFFSET 0x001c /* Sample Period Control Register */
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#define ECSPI_TESTREG_OFFSET 0x0020 /* Test Control Register */
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#define ECSPI_MSGDATA_OFFSET 0x0040 /* Message Data Register */
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#define ECSPI_RXDATA_OFFSET 0x0000 /* Receive Data Register */
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#define ECSPI_TXDATA_OFFSET 0x0004 /* Transmit Data Register */
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#define ECSPI_CONREG_OFFSET 0x0008 /* Control Register */
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#define ECSPI_CONFIGREG_OFFSET 0x000c /* Configuration Register */
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#define ECSPI_INTREG_OFFSET 0x0010 /* Interrupt Control Register */
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#define ECSPI_DMAREG_OFFSET 0x0014 /* DMA Control Register */
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#define ECSPI_STATREG_OFFSET 0x0018 /* Status Register */
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#define ECSPI_PERIODREG_OFFSET 0x001c /* Sample Period Control Register */
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#define ECSPI_TESTREG_OFFSET 0x0020 /* Test Control Register */
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#define ECSPI_MSGDATA_OFFSET 0x0040 /* Message Data Register */
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/* ECSPI Register Addresses *********************************************************/
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/* ECSPI1 */
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#define IMX_ECSPI1_RXDATA (IMX_ECSPI1_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI1_TXDATA (IMX_ECSPI1_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI1_CONREG (IMX_ECSPI1_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI1_CONFIGREG (IMX_ECSPI1_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI1_INTREG (IMX_ECSPI1_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI1_DMAREG (IMX_ECSPI1_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI1_STATREG (IMX_ECSPI1_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI1_PERIODREG (IMX_ECSPI1_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI1_TESTREG (IMX_ECSPI1_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI1_MSGDATA (IMX_ECSPI1_VBASE + ECSPI_MSGDATA_OFFSET)
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#define IMX_ECSPI1_RXDATA (IMX_ECSPI1_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI1_TXDATA (IMX_ECSPI1_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI1_CONREG (IMX_ECSPI1_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI1_CONFIGREG (IMX_ECSPI1_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI1_INTREG (IMX_ECSPI1_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI1_DMAREG (IMX_ECSPI1_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI1_STATREG (IMX_ECSPI1_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI1_PERIODREG (IMX_ECSPI1_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI1_TESTREG (IMX_ECSPI1_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI1_MSGDATA (IMX_ECSPI1_VBASE + ECSPI_MSGDATA_OFFSET)
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/* ECSPI2 */
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#define IMX_ECSPI2_RXDATA (IMX_ECSPI2_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI2_TXDATA (IMX_ECSPI2_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI2_CONREG (IMX_ECSPI2_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI2_CONFIGREG (IMX_ECSPI2_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI2_INTREG (IMX_ECSPI2_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI2_DMAREG (IMX_ECSPI2_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI2_STATREG (IMX_ECSPI2_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI2_PERIODREG (IMX_ECSPI2_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI2_TESTREG (IMX_ECSPI2_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI2_MSGDATA (IMX_ECSPI2_VBASE + ECSPI_MSGDATA_OFFSET)
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#define IMX_ECSPI2_RXDATA (IMX_ECSPI2_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI2_TXDATA (IMX_ECSPI2_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI2_CONREG (IMX_ECSPI2_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI2_CONFIGREG (IMX_ECSPI2_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI2_INTREG (IMX_ECSPI2_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI2_DMAREG (IMX_ECSPI2_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI2_STATREG (IMX_ECSPI2_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI2_PERIODREG (IMX_ECSPI2_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI2_TESTREG (IMX_ECSPI2_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI2_MSGDATA (IMX_ECSPI2_VBASE + ECSPI_MSGDATA_OFFSET)
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/* ECSPI3 */
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#define IMX_ECSPI3_RXDATA (IMX_ECSPI3_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI3_TXDATA (IMX_ECSPI3_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI3_CONREG (IMX_ECSPI3_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI3_CONFIGREG (IMX_ECSPI3_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI3_INTREG (IMX_ECSPI3_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI3_DMAREG (IMX_ECSPI3_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI3_STATREG (IMX_ECSPI3_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI3_PERIODREG (IMX_ECSPI3_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI3_TESTREG (IMX_ECSPI3_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI3_MSGDATA (IMX_ECSPI3_VBASE + ECSPI_MSGDATA_OFFSET)
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#define IMX_ECSPI3_RXDATA (IMX_ECSPI3_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI3_TXDATA (IMX_ECSPI3_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI3_CONREG (IMX_ECSPI3_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI3_CONFIGREG (IMX_ECSPI3_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI3_INTREG (IMX_ECSPI3_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI3_DMAREG (IMX_ECSPI3_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI3_STATREG (IMX_ECSPI3_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI3_PERIODREG (IMX_ECSPI3_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI3_TESTREG (IMX_ECSPI3_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI3_MSGDATA (IMX_ECSPI3_VBASE + ECSPI_MSGDATA_OFFSET)
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/* ECSPI4 */
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#define IMX_ECSPI4_RXDATA (IMX_ECSPI4_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI4_TXDATA (IMX_ECSPI4_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI4_CONREG (IMX_ECSPI4_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI4_CONFIGREG (IMX_ECSPI4_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI4_INTREG (IMX_ECSPI4_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI4_DMAREG (IMX_ECSPI4_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI4_STATREG (IMX_ECSPI4_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI4_PERIODREG (IMX_ECSPI4_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI4_TESTREG (IMX_ECSPI4_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI4_MSGDATA (IMX_ECSPI4_VBASE + ECSPI_MSGDATA_OFFSET)
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#define IMX_ECSPI4_RXDATA (IMX_ECSPI4_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI4_TXDATA (IMX_ECSPI4_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI4_CONREG (IMX_ECSPI4_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI4_CONFIGREG (IMX_ECSPI4_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI4_INTREG (IMX_ECSPI4_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI4_DMAREG (IMX_ECSPI4_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI4_STATREG (IMX_ECSPI4_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI4_PERIODREG (IMX_ECSPI4_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI4_TESTREG (IMX_ECSPI4_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI4_MSGDATA (IMX_ECSPI4_VBASE + ECSPI_MSGDATA_OFFSET)
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/* ECSPI5 */
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#define IMX_ECSPI5_RXDATA (IMX_ECSPI5_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI5_TXDATA (IMX_ECSPI5_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI5_CONREG (IMX_ECSPI5_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI5_CONFIGREG (IMX_ECSPI5_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI5_INTREG (IMX_ECSPI5_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI5_DMAREG (IMX_ECSPI5_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI5_STATREG (IMX_ECSPI5_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI5_PERIODREG (IMX_ECSPI5_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI5_TESTREG (IMX_ECSPI5_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI5_MSGDATA (IMX_ECSPI5_VBASE + ECSPI_MSGDATA_OFFSET)
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#define IMX_ECSPI5_RXDATA (IMX_ECSPI5_VBASE + ECSPI_RXDATA_OFFSET)
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#define IMX_ECSPI5_TXDATA (IMX_ECSPI5_VBASE + ECSPI_TXDATA_OFFSET)
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#define IMX_ECSPI5_CONREG (IMX_ECSPI5_VBASE + ECSPI_CONREG_OFFSET)
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#define IMX_ECSPI5_CONFIGREG (IMX_ECSPI5_VBASE + ECSPI_CONFIGREG_OFFSET)
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#define IMX_ECSPI5_INTREG (IMX_ECSPI5_VBASE + ECSPI_INTREG_OFFSET)
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#define IMX_ECSPI5_DMAREG (IMX_ECSPI5_VBASE + ECSPI_DMAREG_OFFSET)
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#define IMX_ECSPI5_STATREG (IMX_ECSPI5_VBASE + ECSPI_STATREG_OFFSET)
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#define IMX_ECSPI5_PERIODREG (IMX_ECSPI5_VBASE + ECSPI_PERIODREG_OFFSET)
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#define IMX_ECSPI5_TESTREG (IMX_ECSPI5_VBASE + ECSPI_TESTREG_OFFSET)
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#define IMX_ECSPI5_MSGDATA (IMX_ECSPI5_VBASE + ECSPI_MSGDATA_OFFSET)
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/* ECSPI Register Bit Definitions ***************************************************/
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@ -208,18 +205,20 @@
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# define ECSPI_CONFIGREG_HTLEN(n) ((uint32_t)(n) << ECSPI_CONFIGREG_HTLEN_SHIFT)
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/* Bits 29-31: Reserved */
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/* Interrupt Control Register and Status Register */
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/* Common Interrupt Control Register and Status Register */
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#define ECSPI_INTREG_TE (1 << 0) /* Bit 0: TXFIFO Empty Interrupt */
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#define ECSPI_INTREG_TDR (1 << 1) /* Bit 1: TXFIFO Data Request Interrupt */
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#define ECSPI_INTREG_TF (1 << 2) /* Bit 2: TXFIFO Full Interrupt */
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#define ECSPI_INTREG_RR (1 << 3) /* Bit 3: RXFIFO Data Ready Interrupt */
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#define ECSPI_INTREG_RDR (1 << 4) /* Bit 4: RXFIFO Data Request Interrupt enable */
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#define ECSPI_INTREG_RF (1 << 5) /* Bit 5: RXFIFO Full Interrupt */
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#define ECSPI_INTREG_RO (1 << 6) /* Bit 6: RXFIFO Overflow Interrupt */
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#define ECSPI_INTREG_TC (1 << 7) /* Bit 7: Transfer Completed Interrupt enable */
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#define ECSPI_INT_TE (1 << 0) /* Bit 0: TXFIFO Empty Interrupt */
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#define ECSPI_INT_TDR (1 << 1) /* Bit 1: TXFIFO Data Request Interrupt */
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#define ECSPI_INT_TF (1 << 2) /* Bit 2: TXFIFO Full Interrupt */
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#define ECSPI_INT_RR (1 << 3) /* Bit 3: RXFIFO Data Ready Interrupt */
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#define ECSPI_INT_RDR (1 << 4) /* Bit 4: RXFIFO Data Request Interrupt enable */
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#define ECSPI_INT_RF (1 << 5) /* Bit 5: RXFIFO Full Interrupt */
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#define ECSPI_INT_RO (1 << 6) /* Bit 6: RXFIFO Overflow Interrupt */
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#define ECSPI_INT_TC (1 << 7) /* Bit 7: Transfer Completed Interrupt enable */
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/* Bits 8-31: Reserved */
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#define ECSPI_INT_ALL 0x000000ff
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/* ECSPI DMA Control Register */
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#define ECSPI_DMAREG_TXTHRES_SHIFT (0) /* Bits 0-5: TX Threshold */
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@ -237,7 +236,7 @@
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#define ECSPI_DMAREG_RXLEN_MASK (0x3f << ECSPI_DMAREG_RXLEN_SHIFT)
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# define ECSPI_DMAREG_RXLEN(n) ((uint32_t)(n) << ECSPI_DMAREG_RXLEN_SHIFT)
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/* Bit 30: Reserved */
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#define ECSPI_DMAREG_RXTDEN (1 << 31) /* Bit 31: RXFIFO Tail DMA request enable
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#define ECSPI_DMAREG_RXTDEN (1 << 31) /* Bit 31: RXFIFO Tail DMA request enable */
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/* ECSPI Sample Period Control Register */
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@ -268,77 +267,8 @@
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* Public Data
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************************************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif /* __cplusplus */
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/************************************************************************************
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* Public Functions
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* Public Function Prototypes
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************************************************************************************/
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struct spi_dev_s; /* Forward reference */
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enum spi_dev_e; /* Forward reference */
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/************************************************************************************
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* Name: imx_spibus_initialize
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*
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* Description:
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* Initialize common parts the selected SPI port. Initialization of
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* chip select GPIOs must have been performed by board specific logic
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* prior to calling this function. Specifically: GPIOs should have
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* been configured for output, and all chip selects disabled.
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*
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* One GPIO, SS (PB2 on the eZ8F091) is reserved as a chip select. However,
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* If multiple devices on on the bus, then multiple chip selects will be
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* required. Theregore, all GPIO chip management is deferred to board-
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* specific logic.
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*
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* Input Parameter:
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* Port number (for hardware that has mutiple SPI interfaces)
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*
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* Returned Value:
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* Valid SPI device structre reference on succcess; a NULL on failure
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*
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************************************************************************************/
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FAR struct spi_dev_s *imx_spibus_initialize(int port);
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/************************************************************************************
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* The external functions, imx_spiselect, imx_spistatus, and imx_cmddaa must be
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* provided by board-specific logic. These are implementations of the select and
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* status methods of the SPI interface defined by struct spi_ops_s (see
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* include/nuttx/spi/spi.h). All other methods (including imx_spibus_initialize()) are
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* provided by common logic. To use this common SPI logic on your board:
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*
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* 1. Provide imx_spiselect() and imx_spistatus() functions in your board-specific
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* logic. This function will perform chip selection and status operations using
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* GPIOs in the way your board is configured.
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* 2. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration, provide the
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* imx_spicmddata() function in your board-specific logic. This function will
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* perform cmd/data selection operations using GPIOs in the way your board is
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* configured.
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* 3. Add a call to imx_spibus_initialize() in your low level initialization logic
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* 4. The handle returned by imx_spibus_initialize() may then be used to bind the
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* SPI driver to higher level logic (e.g., calling mmcsd_spislotinitialize(),
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* for example, will bind the SPI driver to the SPI MMC/SD driver).
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*
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************************************************************************************/
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void imx_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
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uint8_t imx_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
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#ifdef CONFIG_SPI_CMDDATA
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int imx_spicmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
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#endif
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __ASSEMBLY__ */
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#endif /* __ARCH_ARM_IMX6_ECSPI_H */
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#endif /* __ARCH_ARM_IMX6_CHIP_ECSPI_H */
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132
arch/arm/src/imx6/imx_ecspi.h
Normal file
132
arch/arm/src/imx6/imx_ecspi.h
Normal file
@ -0,0 +1,132 @@
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/************************************************************************************
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* arch/arm/src/imx6/imx_ecspi.h
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*
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* Copyright (C) 2016 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
#ifndef __ARCH_ARM_IMX6_ECSPI_H
|
||||
#define __ARCH_ARM_IMX6_ECSPI_H
|
||||
|
||||
/************************************************************************************
|
||||
* Included Files
|
||||
************************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <stdint.h>
|
||||
#include <stdbool.h>
|
||||
#include <nuttx/spi/spi.h>
|
||||
|
||||
#include "chip/imx_ecspi.h"
|
||||
|
||||
/************************************************************************************
|
||||
* Pre-processor Definitions
|
||||
************************************************************************************/
|
||||
|
||||
/************************************************************************************
|
||||
* Public Data
|
||||
************************************************************************************/
|
||||
|
||||
#ifndef __ASSEMBLY__
|
||||
#ifdef __cplusplus
|
||||
#define EXTERN extern "C"
|
||||
extern "C"
|
||||
{
|
||||
#else
|
||||
#define EXTERN extern
|
||||
#endif /* __cplusplus */
|
||||
|
||||
/************************************************************************************
|
||||
* Public Function Prototypes
|
||||
************************************************************************************/
|
||||
|
||||
struct spi_dev_s; /* Forward reference */
|
||||
enum spi_dev_e; /* Forward reference */
|
||||
|
||||
/************************************************************************************
|
||||
* Name: imx_spibus_initialize
|
||||
*
|
||||
* Description:
|
||||
* Initialize common parts the selected SPI port. Initialization of
|
||||
* chip select GPIOs must have been performed by board specific logic
|
||||
* prior to calling this function. Specifically: GPIOs should have
|
||||
* been configured for output, and all chip selects disabled.
|
||||
*
|
||||
* One GPIO, SS (PB2 on the eZ8F091) is reserved as a chip select. However,
|
||||
* If multiple devices on on the bus, then multiple chip selects will be
|
||||
* required. Theregore, all GPIO chip management is deferred to board-
|
||||
* specific logic.
|
||||
*
|
||||
* Input Parameter:
|
||||
* Port number (for hardware that has mutiple SPI interfaces)
|
||||
*
|
||||
* Returned Value:
|
||||
* Valid SPI device structre reference on succcess; a NULL on failure
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
FAR struct spi_dev_s *imx_spibus_initialize(int port);
|
||||
|
||||
/************************************************************************************
|
||||
* The external functions, imx_spiselect, imx_spistatus, and imx_cmddaa must be
|
||||
* provided by board-specific logic. These are implementations of the select and
|
||||
* status methods of the SPI interface defined by struct spi_ops_s (see
|
||||
* include/nuttx/spi/spi.h). All other methods (including imx_spibus_initialize()) are
|
||||
* provided by common logic. To use this common SPI logic on your board:
|
||||
*
|
||||
* 1. Provide imx_spiselect() and imx_spistatus() functions in your board-specific
|
||||
* logic. This function will perform chip selection and status operations using
|
||||
* GPIOs in the way your board is configured.
|
||||
* 2. If CONFIG_SPI_CMDDATA is defined in your NuttX configuration, provide the
|
||||
* imx_spicmddata() function in your board-specific logic. This function will
|
||||
* perform cmd/data selection operations using GPIOs in the way your board is
|
||||
* configured.
|
||||
* 3. Add a call to imx_spibus_initialize() in your low level initialization logic
|
||||
* 4. The handle returned by imx_spibus_initialize() may then be used to bind the
|
||||
* SPI driver to higher level logic (e.g., calling mmcsd_spislotinitialize(),
|
||||
* for example, will bind the SPI driver to the SPI MMC/SD driver).
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
void imx_spiselect(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected);
|
||||
uint8_t imx_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid);
|
||||
#ifdef CONFIG_SPI_CMDDATA
|
||||
int imx_spicmddata(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool cmd);
|
||||
#endif
|
||||
|
||||
#undef EXTERN
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* __cplusplus */
|
||||
#endif /* __ASSEMBLY__ */
|
||||
|
||||
#endif /* __ARCH_ARM_IMX6_ECSPI_H */
|
||||
Loading…
Reference in New Issue
Block a user