spi.h

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#ifndef _SOC_SPI_H_
#define _SOC_SPI_H_
 
#include <stdint.h>
 
/* These registers live behind SPI_BASE_ADDRESS. */
#define HSFSTS                          0x04
# define FLOCKDN                        (0x1 << 15)
#define LVSCC                           0xc4
# define VCL                            (0x1 << 23)
# define EO(x)                          (((x) & 0xff) << 8)
# define WG_1_BYTE                      (0x0 << 2)
# define WG_64_BYTE                     (0x1 << 2)
# define BES_256_BYTE                   (0x0 << 0)
# define BES_4_KB                       (0x1 << 0)
# define BES_8_KB                       (0x2 << 0)
# define BES_64_KB                      (0x3 << 0)
#define UVSCC                           0xc8
#define SCS                             0xf8
# define SMIWPEN                        (0x1 << 7)
#define BCR                             0xfc
# define EISS                           (0x1 << 5)
# define SRC_MASK                       (0x3 << 2)
# define SRC_CACHE_NO_PREFETCH          (0x0 << 2)
# define SRC_NO_CACHE_NO_PREFETCH       (0x1 << 2)
# define SRC_CACHE_PREFETCH             (0x2 << 2)
# define BCR_LE                         (0x1 << 1)
# define BCR_WPD                        (0x1 << 0)
 
/*
 * SPI VSCC configuration.
 */
struct vscc_config {
        uint32_t lvscc;
        uint32_t uvscc;
};
 
/* Return 0 on success < 0 on failure. */
int mainboard_get_spi_vscc_config(struct vscc_config *cfg);
 
#endif /* _SOC_SPI_H_ */