--- /dev/null
+/*
+ * [origin: Linux kernel include/asm-arm/arch-at91/at91_spi.h]
+ *
+ * Copyright (C) 2005 Ivan Kokshaysky
+ * Copyright (C) SAN People
+ *
+ * Serial Peripheral Interface (SPI) registers.
+ * Based on AT91RM9200 datasheet revision E.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef AT91_SPI_H
+#define AT91_SPI_H
+
+#include <asm/arch/at91_pdc.h>
+
+typedef struct at91_spi {
+ u32 cr; /* 0x00 Control Register */
+ u32 mr; /* 0x04 Mode Register */
+ u32 rdr; /* 0x08 Receive Data Register */
+ u32 tdr; /* 0x0C Transmit Data Register */
+ u32 sr; /* 0x10 Status Register */
+ u32 ier; /* 0x14 Interrupt Enable Register */
+ u32 idr; /* 0x18 Interrupt Disable Register */
+ u32 imr; /* 0x1C Interrupt Mask Register */
+ u32 reserve1[4];
+ u32 csr[4]; /* 0x30 Chip Select Register 0-3 */
+ u32 reserve2[48];
+ at91_pdc_t pdc;
+} at91_spi_t;
+
+#ifdef CONFIG_ATMEL_LEGACY
+
+#define AT91_SPI_CR 0x00 /* Control Register */
+#define AT91_SPI_SPIEN (1 << 0) /* SPI Enable */
+#define AT91_SPI_SPIDIS (1 << 1) /* SPI Disable */
+#define AT91_SPI_SWRST (1 << 7) /* SPI Software Reset */
+#define AT91_SPI_LASTXFER (1 << 24) /* Last Transfer [SAM9261 only] */
+
+#define AT91_SPI_MR 0x04 /* Mode Register */
+#define AT91_SPI_MSTR (1 << 0) /* Master/Slave Mode */
+#define AT91_SPI_PS (1 << 1) /* Peripheral Select */
+#define AT91_SPI_PS_FIXED (0 << 1)
+#define AT91_SPI_PS_VARIABLE (1 << 1)
+#define AT91_SPI_PCSDEC (1 << 2) /* Chip Select Decode */
+#define AT91_SPI_DIV32 (1 << 3) /* Clock Selection [AT91RM9200 only] */
+#define AT91_SPI_MODFDIS (1 << 4) /* Mode Fault Detection */
+#define AT91_SPI_LLB (1 << 7) /* Local Loopback Enable */
+#define AT91_SPI_PCS (0xf << 16) /* Peripheral Chip Select */
+#define AT91_SPI_DLYBCS (0xff << 24) /* Delay Between Chip Selects */
+
+#define AT91_SPI_RDR 0x08 /* Receive Data Register */
+#define AT91_SPI_RD (0xffff << 0) /* Receive Data */
+#define AT91_SPI_PCS (0xf << 16) /* Peripheral Chip Select */
+
+#define AT91_SPI_TDR 0x0c /* Transmit Data Register */
+#define AT91_SPI_TD (0xffff << 0) /* Transmit Data */
+#define AT91_SPI_PCS (0xf << 16) /* Peripheral Chip Select */
+#define AT91_SPI_LASTXFER (1 << 24) /* Last Transfer [SAM9261 only] */
+
+#define AT91_SPI_SR 0x10 /* Status Register */
+#define AT91_SPI_RDRF (1 << 0) /* Receive Data Register Full */
+#define AT91_SPI_TDRE (1 << 1) /* Transmit Data Register Full */
+#define AT91_SPI_MODF (1 << 2) /* Mode Fault Error */
+#define AT91_SPI_OVRES (1 << 3) /* Overrun Error Status */
+#define AT91_SPI_ENDRX (1 << 4) /* End of RX buffer */
+#define AT91_SPI_ENDTX (1 << 5) /* End of TX buffer */
+#define AT91_SPI_RXBUFF (1 << 6) /* RX Buffer Full */
+#define AT91_SPI_TXBUFE (1 << 7) /* TX Buffer Empty */
+#define AT91_SPI_NSSR (1 << 8) /* NSS Rising [SAM9261 only] */
+#define AT91_SPI_TXEMPTY (1 << 9) /* Transmission Register Empty [SAM9261 only] */
+#define AT91_SPI_SPIENS (1 << 16) /* SPI Enable Status */
+
+#define AT91_SPI_IER 0x14 /* Interrupt Enable Register */
+#define AT91_SPI_IDR 0x18 /* Interrupt Disable Register */
+#define AT91_SPI_IMR 0x1c /* Interrupt Mask Register */
+
+#define AT91_SPI_CSR(n) (0x30 + ((n) * 4)) /* Chip Select Registers 0-3 */
+#define AT91_SPI_CPOL (1 << 0) /* Clock Polarity */
+#define AT91_SPI_NCPHA (1 << 1) /* Clock Phase */
+#define AT91_SPI_CSAAT (1 << 3) /* Chip Select Active After Transfer [SAM9261 only] */
+#define AT91_SPI_BITS (0xf << 4) /* Bits Per Transfer */
+#define AT91_SPI_BITS_8 (0 << 4)
+#define AT91_SPI_BITS_9 (1 << 4)
+#define AT91_SPI_BITS_10 (2 << 4)
+#define AT91_SPI_BITS_11 (3 << 4)
+#define AT91_SPI_BITS_12 (4 << 4)
+#define AT91_SPI_BITS_13 (5 << 4)
+#define AT91_SPI_BITS_14 (6 << 4)
+#define AT91_SPI_BITS_15 (7 << 4)
+#define AT91_SPI_BITS_16 (8 << 4)
+#define AT91_SPI_SCBR (0xff << 8) /* Serial Clock Baud Rate */
+#define AT91_SPI_DLYBS (0xff << 16) /* Delay before SPCK */
+#define AT91_SPI_DLYBCT (0xff << 24) /* Delay between Consecutive Transfers */
+
+#define AT91_SPI_RPR 0x0100 /* Receive Pointer Register */
+
+#define AT91_SPI_RCR 0x0104 /* Receive Counter Register */
+
+#define AT91_SPI_TPR 0x0108 /* Transmit Pointer Register */
+
+#define AT91_SPI_TCR 0x010c /* Transmit Counter Register */
+
+#define AT91_SPI_RNPR 0x0110 /* Receive Next Pointer Register */
+
+#define AT91_SPI_RNCR 0x0114 /* Receive Next Counter Register */
+
+#define AT91_SPI_TNPR 0x0118 /* Transmit Next Pointer Register */
+
+#define AT91_SPI_TNCR 0x011c /* Transmit Next Counter Register */
+
+#define AT91_SPI_PTCR 0x0120 /* PDC Transfer Control Register */
+#define AT91_SPI_RXTEN (0x1 << 0) /* Receiver Transfer Enable */
+#define AT91_SPI_RXTDIS (0x1 << 1) /* Receiver Transfer Disable */
+#define AT91_SPI_TXTEN (0x1 << 8) /* Transmitter Transfer Enable */
+#define AT91_SPI_TXTDIS (0x1 << 9) /* Transmitter Transfer Disable */
+
+#define AT91_SPI_PTSR 0x0124 /* PDC Transfer Status Register */
+
+#endif /* CONFIG_ATMEL_LEGACY */
+
+#endif
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