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- /**************************************************************************//**
- * @file spi.c
- * @brief N9H30 SPI driver source file
- *
- * @note
- * SPDX-License-Identifier: Apache-2.0
- * Copyright (C) 2018 Nuvoton Technology Corp. All rights reserved.
- *****************************************************************************/
- /* Header files */
- #include <stdio.h>
- #include <string.h>
- #include "N9H30.h"
- #include "nu_sys.h"
- #include "nu_spi.h"
- /** @addtogroup N9H30_Device_Driver N9H30 Device Driver
- @{
- */
- /** @addtogroup N9H30_SPI_Driver SPI Driver
- @{
- */
- /** @addtogroup N9H30_SPI_EXPORTED_CONSTANTS SPI Exported Constants
- @{
- */
- /// @cond HIDDEN_SYMBOLS
- #define spi_out(dev, byte, addr) outpw((dev)->base + addr, byte)
- #define spi_in(dev, addr) inpw((dev)->base + addr)
- typedef struct
- {
- uint32_t base; /* spi bus number */
- uint8_t openflag;
- uint8_t intflag;
- } spi_dev;
- /// @endcond HIDDEN_SYMBOLS
- /*@}*/ /* end of group N9H30_EMAC_EXPORTED_CONSTANTS */
- /** @addtogroup N9H30_SPI_EXPORTED_FUNCTIONS SPI Exported Functions
- @{
- */
- /// @cond HIDDEN_SYMBOLS
- static spi_dev spi_device[SPI_NUMBER];
- #if 0
- /**
- * @brief SPI-0 Interrupt handler
- * @param None
- * @return None
- */
- static void spi0ISR(void)
- {
- // clear interrupt flag
- outpw(REG_SPI0_CNTRL, spi_in((spi_dev *)((uint32_t)&spi_device[0]), CNTRL) | 0x1 << 16);
- spi_device[0].intflag = 1;
- }
- /**
- * @brief SPI-1 Interrupt handler
- * @param None
- * @return None
- */
- static void spi1ISR(void)
- {
- // clear interrupt flag
- outpw(REG_SPI1_CNTRL, spi_in((spi_dev *)((uint32_t)&spi_device[1]), CNTRL) | 0x1 << 16);
- spi_device[1].intflag = 1;
- }
- #endif
- /**
- * @brief Set SPI divider
- * @param[in] dev pointer to spi interface structure
- * @param[in] speed desire spi speed
- * @return speed set actually
- */
- static uint32_t spiSetSpeed(spi_dev *dev, uint32_t speed)
- {
- uint16_t div = (uint16_t)(SPI_INPUT_CLOCK / (2 * speed)) - 1;
- spi_out(dev, div, DIVIDER);
- return (SPI_INPUT_CLOCK / (2 * (div + 1)));
- }
- /// @endcond /* HIDDEN_SYMBOLS */
- /**
- * @brief Initialize spi interface and install interrupt callback function
- * @return always 0.
- * @retval 0 Success.
- */
- int32_t spiInit(int32_t fd)
- {
- #if 0
- if (fd == 0)
- {
- sysInstallISR(IRQ_LEVEL_1, SPI0_IRQn, (PVOID)spi0ISR);
- sysEnableInterrupt(SPI0_IRQn);
- memset((void *)&spi_device[0], 0, sizeof(spi_dev));
- }
- else
- {
- sysInstallISR(IRQ_LEVEL_1, SPI1_IRQn, (PVOID)spi1ISR);
- sysEnableInterrupt(SPI1_IRQn);
- memset((void *)&spi_device[1], 0, sizeof(spi_dev));
- }
- sysSetLocalInterrupt(ENABLE_IRQ);
- #endif
- return (0);
- }
- /**
- * @brief Support some spi driver commands for application.
- * @param[in] fd is interface number.
- * @param[in] cmd is command.
- * @param[in] arg0 is the first argument of command.
- * @param[in] arg1 is the second argument of command.
- * @return command status.
- * @retval 0 Success otherwise fail. Fail value could be
- * - \ref SPI_ERR_NODEV
- * - \ref SPI_ERR_IO
- * - \ref SPI_ERR_ARG
- */
- int32_t spiIoctl(int32_t fd, uint32_t cmd, uint32_t arg0, uint32_t arg1)
- {
- spi_dev *dev;
- if (fd != 0 && fd != 1)
- return (SPI_ERR_NODEV);
- dev = (spi_dev *)((uint32_t)&spi_device[fd]);
- if (dev->openflag == 0)
- return (SPI_ERR_IO);
- switch (cmd)
- {
- case SPI_IOC_TRIGGER:
- dev->intflag = 0;
- spi_out(dev, spi_in(dev, CNTRL) | 0x1, CNTRL);
- break;
- #if 0
- case SPI_IOC_SET_INTERRUPT:
- if (arg0 == SPI_ENABLE_INTERRUPT)
- spi_out(dev, spi_in(dev, CNTRL) | (0x1 << 17), CNTRL);
- else
- spi_out(dev, spi_in(dev, CNTRL) & ~(0x1 << 17), CNTRL);
- break;
- #endif
- case SPI_IOC_SET_SPEED:
- return spiSetSpeed(dev, (uint32_t)arg0);
- case SPI_IOC_SET_DUAL_QUAD_MODE:
- if (arg0 == SPI_DISABLE_DUAL_QUAD)
- {
- spi_out(dev, (spi_in(dev, CNTRL) & ~(0x3 << 21)), CNTRL);
- break;
- }
- if (arg0 == SPI_DUAL_MODE)
- spi_out(dev, (spi_in(dev, CNTRL) & ~(0x3 << 21)) | (0x1 << 22), CNTRL);
- else
- spi_out(dev, (spi_in(dev, CNTRL) & ~(0x3 << 21)) | (0x1 << 21), CNTRL);
- break;
- case SPI_IOC_SET_DUAL_QUAD_DIR:
- if (arg0 == SPI_DUAL_QUAD_INPUT)
- spi_out(dev, spi_in(dev, CNTRL) & ~(0x1 << 20), CNTRL);
- else
- spi_out(dev, spi_in(dev, CNTRL) | (0x1 << 20), CNTRL);
- break;
- case SPI_IOC_SET_LSB_MSB:
- if (arg0 == SPI_MSB)
- spi_out(dev, spi_in(dev, CNTRL) & ~(0x1 << 10), CNTRL);
- else
- spi_out(dev, spi_in(dev, CNTRL) | (0x1 << 10), CNTRL);
- break;
- case SPI_IOC_SET_TX_NUM:
- if (arg0 < 4)
- spi_out(dev, (spi_in(dev, CNTRL) & ~(0x3 << 8)) | (arg0 << 8), CNTRL);
- else
- return SPI_ERR_ARG;
- break;
- case SPI_IOC_SET_TX_BITLEN:
- if (arg0 < 32)
- spi_out(dev, (spi_in(dev, CNTRL) & ~(0x1f << 3)) | (arg0 << 3), CNTRL);
- else
- return SPI_ERR_ARG;
- break;
- case SPI_IOC_SET_MODE:
- if (arg0 > SPI_MODE_3)
- return SPI_ERR_ARG;
- if (arg0 == SPI_MODE_0)
- spi_out(dev, (spi_in(dev, CNTRL) & ~((0x3 << 1) | (1UL << 31))) | (1 << 2), CNTRL);
- else if (arg0 == SPI_MODE_1)
- spi_out(dev, (spi_in(dev, CNTRL) & ~((0x3 << 1) | (1UL << 31))) | (1 << 1), CNTRL);
- else if (arg0 == SPI_MODE_2)
- spi_out(dev, (spi_in(dev, CNTRL) & ~((0x3 << 1) | (1UL << 31))) | ((1UL << 31) | (1 << 2)), CNTRL);
- else
- spi_out(dev, (spi_in(dev, CNTRL) & ~((0x3 << 1) | (1UL << 31))) | ((1UL << 31) | (1 << 1)), CNTRL);
- break;
- case SPI_IOC_ENABLE_SS:
- if (arg0 == SPI_SS_SS0)
- spi_out(dev, (spi_in(dev, SSR) & ~(0x3)) | 0x1, SSR);
- else if (arg0 == SPI_SS_SS1)
- spi_out(dev, (spi_in(dev, SSR) & ~(0x3)) | 0x2, SSR);
- else if (arg0 == SPI_SS_BOTH)
- spi_out(dev, (spi_in(dev, SSR) & ~(0x3)) | 0x3, SSR);
- else
- return SPI_ERR_ARG;
- break;
- case SPI_IOC_DISABLE_SS:
- if (arg0 == SPI_SS_SS0)
- spi_out(dev, (spi_in(dev, SSR) & ~(0x1)), SSR);
- else if (arg0 == SPI_SS_SS1)
- spi_out(dev, (spi_in(dev, SSR) & ~(0x2)), SSR);
- else if (arg0 == SPI_SS_BOTH)
- spi_out(dev, (spi_in(dev, SSR) & ~(0x3)), SSR);
- else
- return SPI_ERR_ARG;
- break;
- case SPI_IOC_SET_AUTOSS:
- if (arg0 == SPI_DISABLE_AUTOSS)
- spi_out(dev, spi_in(dev, SSR) & ~(0x1 << 3), SSR);
- else
- spi_out(dev, spi_in(dev, SSR) | (0x1 << 3), SSR);
- break;
- case SPI_IOC_SET_SS_ACTIVE_LEVEL:
- if (arg0 == SPI_SS_ACTIVE_LOW)
- spi_out(dev, spi_in(dev, SSR) & ~(0x1 << 2), SSR);
- else
- spi_out(dev, spi_in(dev, SSR) | (0x1 << 2), SSR);
- default:
- break;
- }
- return 0;
- }
- /**
- * @brief Open spi interface and initialize some variables
- * @param[in] fd is interface number.
- * @return always 0
- * @retval 0 success.
- */
- int spiOpen(int32_t fd)
- {
- spi_dev *dev;
- if ((uint32_t)fd >= SPI_NUMBER)
- return SPI_ERR_NODEV;
- dev = (spi_dev *)((uint32_t)&spi_device[fd]);
- if (dev->openflag != 0) /* a card slot can open only once */
- return (SPI_ERR_BUSY);
- memset(dev, 0, sizeof(spi_dev));
- dev->base = ((uint32_t)fd) ? SPI1_BA : SPI0_BA;
- dev->openflag = 1;
- dev->intflag = 0;
- return 0;
- }
- /**
- * @brief Get busy status of spi interface
- * @param[in] fd is interface number.
- * @return busy or not
- * @retval 0 not busy.
- * @retval 1 busy.
- */
- uint8_t spiGetBusyStatus(int32_t fd)
- {
- spi_dev *dev;
- dev = (spi_dev *)((uint32_t)&spi_device[fd]);
- if (spi_in(dev, CNTRL) & (0x1 << 17))
- return (!dev->intflag);
- else
- return ((spi_in(dev, CNTRL) & 0x1) == 0x1 ? 1 : 0);
- }
- /**
- * @brief Read data form spi interface
- * @param[in] fd is interface number.
- * @param[in] buff_id is buffer number. If transfer number is 4, application needs read 4 times (buff_id is from 0 to 3) from buffer.
- * @return data
- */
- uint32_t spiRead(int32_t fd, uint8_t buff_id)
- {
- spi_dev *dev;
- dev = (spi_dev *)((uint32_t)&spi_device[fd]);
- return spi_in(dev, (RX0 + 4 * buff_id));
- }
- /**
- * @brief Write data to spi interface
- * @param[in] fd is interface number.
- * @param[in] buff_id is buffer number. If transfer number is 4, application needs write 4 times (buff_id is from 0 to 3) to buffer.
- * @param[in] data is data to be written.
- * @return none
- */
- void spiWrite(int32_t fd, uint8_t buff_id, uint32_t data)
- {
- spi_dev *dev;
- dev = (spi_dev *)((uint32_t)&spi_device[fd]);
- spi_out(dev, data, (TX0 + 4 * buff_id));
- }
- /*@}*/ /* end of group N9H30_SPI_EXPORTED_FUNCTIONS */
- /*@}*/ /* end of group N9H30_SPI_Driver */
- /*@}*/ /* end of group N9H30_Device_Driver */
- /*** (C) COPYRIGHT 2018 Nuvoton Technology Corp. ***/
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