104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
|
/*
|
||
|
|
* IMX SPI Controller
|
||
|
|
*
|
||
|
|
* Copyright 2016 Jean-Christophe Dubois <jcd@tribudubois.net>
|
||
|
|
*
|
||
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
||
|
|
* See the COPYING file in the top-level directory.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef IMX_SPI_H
|
||
|
|
#define IMX_SPI_H
|
||
|
|
|
||
|
|
#include "hw/sysbus.h"
|
||
|
|
#include "hw/ssi/ssi.h"
|
||
|
|
#include "qemu/bitops.h"
|
||
|
|
#include "qemu/fifo32.h"
|
||
|
|
|
||
|
|
#define ECSPI_FIFO_SIZE 64
|
||
|
|
|
||
|
|
#define ECSPI_RXDATA 0
|
||
|
|
#define ECSPI_TXDATA 1
|
||
|
|
#define ECSPI_CONREG 2
|
||
|
|
#define ECSPI_CONFIGREG 3
|
||
|
|
#define ECSPI_INTREG 4
|
||
|
|
#define ECSPI_DMAREG 5
|
||
|
|
#define ECSPI_STATREG 6
|
||
|
|
#define ECSPI_PERIODREG 7
|
||
|
|
#define ECSPI_TESTREG 8
|
||
|
|
#define ECSPI_MSGDATA 16
|
||
|
|
#define ECSPI_MAX 17
|
||
|
|
|
||
|
|
/* ECSPI_CONREG */
|
||
|
|
#define ECSPI_CONREG_EN (1 << 0)
|
||
|
|
#define ECSPI_CONREG_HT (1 << 1)
|
||
|
|
#define ECSPI_CONREG_XCH (1 << 2)
|
||
|
|
#define ECSPI_CONREG_SMC (1 << 3)
|
||
|
|
#define ECSPI_CONREG_CHANNEL_MODE_SHIFT 4
|
||
|
|
#define ECSPI_CONREG_CHANNEL_MODE_LENGTH 4
|
||
|
|
#define ECSPI_CONREG_DRCTL_SHIFT 16
|
||
|
|
#define ECSPI_CONREG_DRCTL_LENGTH 2
|
||
|
|
#define ECSPI_CONREG_CHANNEL_SELECT_SHIFT 18
|
||
|
|
#define ECSPI_CONREG_CHANNEL_SELECT_LENGTH 2
|
||
|
|
#define ECSPI_CONREG_BURST_LENGTH_SHIFT 20
|
||
|
|
#define ECSPI_CONREG_BURST_LENGTH_LENGTH 12
|
||
|
|
|
||
|
|
/* ECSPI_CONFIGREG */
|
||
|
|
#define ECSPI_CONFIGREG_SS_CTL_SHIFT 8
|
||
|
|
#define ECSPI_CONFIGREG_SS_CTL_LENGTH 4
|
||
|
|
|
||
|
|
/* ECSPI_INTREG */
|
||
|
|
#define ECSPI_INTREG_TEEN (1 << 0)
|
||
|
|
#define ECSPI_INTREG_TDREN (1 << 1)
|
||
|
|
#define ECSPI_INTREG_TFEN (1 << 2)
|
||
|
|
#define ECSPI_INTREG_RREN (1 << 3)
|
||
|
|
#define ECSPI_INTREG_RDREN (1 << 4)
|
||
|
|
#define ECSPI_INTREG_RFEN (1 << 5)
|
||
|
|
#define ECSPI_INTREG_ROEN (1 << 6)
|
||
|
|
#define ECSPI_INTREG_TCEN (1 << 7)
|
||
|
|
|
||
|
|
/* ECSPI_DMAREG */
|
||
|
|
#define ECSPI_DMAREG_RXTDEN (1 << 31)
|
||
|
|
#define ECSPI_DMAREG_RXDEN (1 << 23)
|
||
|
|
#define ECSPI_DMAREG_TEDEN (1 << 7)
|
||
|
|
#define ECSPI_DMAREG_RX_THRESHOLD_SHIFT 16
|
||
|
|
#define ECSPI_DMAREG_RX_THRESHOLD_LENGTH 6
|
||
|
|
|
||
|
|
/* ECSPI_STATREG */
|
||
|
|
#define ECSPI_STATREG_TE (1 << 0)
|
||
|
|
#define ECSPI_STATREG_TDR (1 << 1)
|
||
|
|
#define ECSPI_STATREG_TF (1 << 2)
|
||
|
|
#define ECSPI_STATREG_RR (1 << 3)
|
||
|
|
#define ECSPI_STATREG_RDR (1 << 4)
|
||
|
|
#define ECSPI_STATREG_RF (1 << 5)
|
||
|
|
#define ECSPI_STATREG_RO (1 << 6)
|
||
|
|
#define ECSPI_STATREG_TC (1 << 7)
|
||
|
|
|
||
|
|
#define EXTRACT(value, name) extract32(value, name##_SHIFT, name##_LENGTH)
|
||
|
|
|
||
|
|
#define TYPE_IMX_SPI "imx.spi"
|
||
|
|
#define IMX_SPI(obj) OBJECT_CHECK(IMXSPIState, (obj), TYPE_IMX_SPI)
|
||
|
|
|
||
|
|
typedef struct IMXSPIState {
|
||
|
|
/* <private> */
|
||
|
|
SysBusDevice parent_obj;
|
||
|
|
|
||
|
|
/* <public> */
|
||
|
|
MemoryRegion iomem;
|
||
|
|
|
||
|
|
qemu_irq irq;
|
||
|
|
|
||
|
|
qemu_irq cs_lines[4];
|
||
|
|
|
||
|
|
SSIBus *bus;
|
||
|
|
|
||
|
|
uint32_t regs[ECSPI_MAX];
|
||
|
|
|
||
|
|
Fifo32 rx_fifo;
|
||
|
|
Fifo32 tx_fifo;
|
||
|
|
|
||
|
|
int16_t burst_length;
|
||
|
|
} IMXSPIState;
|
||
|
|
|
||
|
|
#endif /* IMX_SPI_H */
|