drivers/spi/spi-cavium.h

Source file repositories/reference/linux-study-clean/drivers/spi/spi-cavium.h

File Facts

System
Linux kernel
Corpus path
drivers/spi/spi-cavium.h
Extension
.h
Size
7336 bytes
Lines
334
Domain
Driver Families
Bucket
drivers/spi
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

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_controller *ctlr,
				    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;

Annotation

Implementation Notes