xref: /openbmc/linux/drivers/spi/spi-cavium.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __SPI_CAVIUM_H
#define __SPI_CAVIUM_H

#include <linux/clk.h>

#define OCTEON_SPI_MAX_BYTES 9
#define OCTEON_SPI_MAX_CLOCK_HZ 16000000

struct octeon_spi_regs {
	int config;
	int status;
	int tx;
	int data;
};

struct octeon_spi {
	void __iomem *register_base;
	u64 last_cfg;
	u64 cs_enax;
	int sys_freq;
	struct octeon_spi_regs regs;
	struct clk *clk;
};

#define OCTEON_SPI_CFG(x)	(x->regs.config)
#define OCTEON_SPI_STS(x)	(x->regs.status)
#define OCTEON_SPI_TX(x)	(x->regs.tx)
#define OCTEON_SPI_DAT0(x)	(x->regs.data)

int octeon_spi_transfer_one_message(struct spi_master *master,
				    struct spi_message *msg);

/* MPI register descriptions */

#define CVMX_MPI_CFG (CVMX_ADD_IO_SEG(0x0001070000001000ull))
#define CVMX_MPI_DATX(offset) (CVMX_ADD_IO_SEG(0x0001070000001080ull) + ((offset) & 15) * 8)
#define CVMX_MPI_STS (CVMX_ADD_IO_SEG(0x0001070000001008ull))
#define CVMX_MPI_TX (CVMX_ADD_IO_SEG(0x0001070000001010ull))

union cvmx_mpi_cfg {
	uint64_t u64;
	struct cvmx_mpi_cfg_s {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_29_63:35;
		uint64_t clkdiv:13;
		uint64_t csena3:1;
		uint64_t csena2:1;
		uint64_t csena1:1;
		uint64_t csena0:1;
		uint64_t cslate:1;
		uint64_t tritx:1;
		uint64_t idleclks:2;
		uint64_t cshi:1;
		uint64_t csena:1;
		uint64_t int_ena:1;
		uint64_t lsbfirst:1;
		uint64_t wireor:1;
		uint64_t clk_cont:1;
		uint64_t idlelo:1;
		uint64_t enable:1;
#else
		uint64_t enable:1;
		uint64_t idlelo:1;
		uint64_t clk_cont:1;
		uint64_t wireor:1;
		uint64_t lsbfirst:1;
		uint64_t int_ena:1;
		uint64_t csena:1;
		uint64_t cshi:1;
		uint64_t idleclks:2;
		uint64_t tritx:1;
		uint64_t cslate:1;
		uint64_t csena0:1;
		uint64_t csena1:1;
		uint64_t csena2:1;
		uint64_t csena3:1;
		uint64_t clkdiv:13;
		uint64_t reserved_29_63:35;
#endif
	} s;
	struct cvmx_mpi_cfg_cn30xx {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_29_63:35;
		uint64_t clkdiv:13;
		uint64_t reserved_12_15:4;
		uint64_t cslate:1;
		uint64_t tritx:1;
		uint64_t idleclks:2;
		uint64_t cshi:1;
		uint64_t csena:1;
		uint64_t int_ena:1;
		uint64_t lsbfirst:1;
		uint64_t wireor:1;
		uint64_t clk_cont:1;
		uint64_t idlelo:1;
		uint64_t enable:1;
#else
		uint64_t enable:1;
		uint64_t idlelo:1;
		uint64_t clk_cont:1;
		uint64_t wireor:1;
		uint64_t lsbfirst:1;
		uint64_t int_ena:1;
		uint64_t csena:1;
		uint64_t cshi:1;
		uint64_t idleclks:2;
		uint64_t tritx:1;
		uint64_t cslate:1;
		uint64_t reserved_12_15:4;
		uint64_t clkdiv:13;
		uint64_t reserved_29_63:35;
#endif
	} cn30xx;
	struct cvmx_mpi_cfg_cn31xx {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_29_63:35;
		uint64_t clkdiv:13;
		uint64_t reserved_11_15:5;
		uint64_t tritx:1;
		uint64_t idleclks:2;
		uint64_t cshi:1;
		uint64_t csena:1;
		uint64_t int_ena:1;
		uint64_t lsbfirst:1;
		uint64_t wireor:1;
		uint64_t clk_cont:1;
		uint64_t idlelo:1;
		uint64_t enable:1;
#else
		uint64_t enable:1;
		uint64_t idlelo:1;
		uint64_t clk_cont:1;
		uint64_t wireor:1;
		uint64_t lsbfirst:1;
		uint64_t int_ena:1;
		uint64_t csena:1;
		uint64_t cshi:1;
		uint64_t idleclks:2;
		uint64_t tritx:1;
		uint64_t reserved_11_15:5;
		uint64_t clkdiv:13;
		uint64_t reserved_29_63:35;
#endif
	} cn31xx;
	struct cvmx_mpi_cfg_cn30xx cn50xx;
	struct cvmx_mpi_cfg_cn61xx {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_29_63:35;
		uint64_t clkdiv:13;
		uint64_t reserved_14_15:2;
		uint64_t csena1:1;
		uint64_t csena0:1;
		uint64_t cslate:1;
		uint64_t tritx:1;
		uint64_t idleclks:2;
		uint64_t cshi:1;
		uint64_t reserved_6_6:1;
		uint64_t int_ena:1;
		uint64_t lsbfirst:1;
		uint64_t wireor:1;
		uint64_t clk_cont:1;
		uint64_t idlelo:1;
		uint64_t enable:1;
#else
		uint64_t enable:1;
		uint64_t idlelo:1;
		uint64_t clk_cont:1;
		uint64_t wireor:1;
		uint64_t lsbfirst:1;
		uint64_t int_ena:1;
		uint64_t reserved_6_6:1;
		uint64_t cshi:1;
		uint64_t idleclks:2;
		uint64_t tritx:1;
		uint64_t cslate:1;
		uint64_t csena0:1;
		uint64_t csena1:1;
		uint64_t reserved_14_15:2;
		uint64_t clkdiv:13;
		uint64_t reserved_29_63:35;
#endif
	} cn61xx;
	struct cvmx_mpi_cfg_cn66xx {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_29_63:35;
		uint64_t clkdiv:13;
		uint64_t csena3:1;
		uint64_t csena2:1;
		uint64_t reserved_12_13:2;
		uint64_t cslate:1;
		uint64_t tritx:1;
		uint64_t idleclks:2;
		uint64_t cshi:1;
		uint64_t reserved_6_6:1;
		uint64_t int_ena:1;
		uint64_t lsbfirst:1;
		uint64_t wireor:1;
		uint64_t clk_cont:1;
		uint64_t idlelo:1;
		uint64_t enable:1;
#else
		uint64_t enable:1;
		uint64_t idlelo:1;
		uint64_t clk_cont:1;
		uint64_t wireor:1;
		uint64_t lsbfirst:1;
		uint64_t int_ena:1;
		uint64_t reserved_6_6:1;
		uint64_t cshi:1;
		uint64_t idleclks:2;
		uint64_t tritx:1;
		uint64_t cslate:1;
		uint64_t reserved_12_13:2;
		uint64_t csena2:1;
		uint64_t csena3:1;
		uint64_t clkdiv:13;
		uint64_t reserved_29_63:35;
#endif
	} cn66xx;
	struct cvmx_mpi_cfg_cn61xx cnf71xx;
};

union cvmx_mpi_datx {
	uint64_t u64;
	struct cvmx_mpi_datx_s {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_8_63:56;
		uint64_t data:8;
#else
		uint64_t data:8;
		uint64_t reserved_8_63:56;
#endif
	} s;
	struct cvmx_mpi_datx_s cn30xx;
	struct cvmx_mpi_datx_s cn31xx;
	struct cvmx_mpi_datx_s cn50xx;
	struct cvmx_mpi_datx_s cn61xx;
	struct cvmx_mpi_datx_s cn66xx;
	struct cvmx_mpi_datx_s cnf71xx;
};

union cvmx_mpi_sts {
	uint64_t u64;
	struct cvmx_mpi_sts_s {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_13_63:51;
		uint64_t rxnum:5;
		uint64_t reserved_1_7:7;
		uint64_t busy:1;
#else
		uint64_t busy:1;
		uint64_t reserved_1_7:7;
		uint64_t rxnum:5;
		uint64_t reserved_13_63:51;
#endif
	} s;
	struct cvmx_mpi_sts_s cn30xx;
	struct cvmx_mpi_sts_s cn31xx;
	struct cvmx_mpi_sts_s cn50xx;
	struct cvmx_mpi_sts_s cn61xx;
	struct cvmx_mpi_sts_s cn66xx;
	struct cvmx_mpi_sts_s cnf71xx;
};

union cvmx_mpi_tx {
	uint64_t u64;
	struct cvmx_mpi_tx_s {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_22_63:42;
		uint64_t csid:2;
		uint64_t reserved_17_19:3;
		uint64_t leavecs:1;
		uint64_t reserved_13_15:3;
		uint64_t txnum:5;
		uint64_t reserved_5_7:3;
		uint64_t totnum:5;
#else
		uint64_t totnum:5;
		uint64_t reserved_5_7:3;
		uint64_t txnum:5;
		uint64_t reserved_13_15:3;
		uint64_t leavecs:1;
		uint64_t reserved_17_19:3;
		uint64_t csid:2;
		uint64_t reserved_22_63:42;
#endif
	} s;
	struct cvmx_mpi_tx_cn30xx {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_17_63:47;
		uint64_t leavecs:1;
		uint64_t reserved_13_15:3;
		uint64_t txnum:5;
		uint64_t reserved_5_7:3;
		uint64_t totnum:5;
#else
		uint64_t totnum:5;
		uint64_t reserved_5_7:3;
		uint64_t txnum:5;
		uint64_t reserved_13_15:3;
		uint64_t leavecs:1;
		uint64_t reserved_17_63:47;
#endif
	} cn30xx;
	struct cvmx_mpi_tx_cn30xx cn31xx;
	struct cvmx_mpi_tx_cn30xx cn50xx;
	struct cvmx_mpi_tx_cn61xx {
#ifdef __BIG_ENDIAN_BITFIELD
		uint64_t reserved_21_63:43;
		uint64_t csid:1;
		uint64_t reserved_17_19:3;
		uint64_t leavecs:1;
		uint64_t reserved_13_15:3;
		uint64_t txnum:5;
		uint64_t reserved_5_7:3;
		uint64_t totnum:5;
#else
		uint64_t totnum:5;
		uint64_t reserved_5_7:3;
		uint64_t txnum:5;
		uint64_t reserved_13_15:3;
		uint64_t leavecs:1;
		uint64_t reserved_17_19:3;
		uint64_t csid:1;
		uint64_t reserved_21_63:43;
#endif
	} cn61xx;
	struct cvmx_mpi_tx_s cn66xx;
	struct cvmx_mpi_tx_cn61xx cnf71xx;
};

#endif /* __SPI_CAVIUM_H */