LXR linux/drivers/spi/spi-fsl-spi.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * Freescale SPI controller driver.
   4 *
   5 * Maintainer: Kumar Gala
   6 *
   7 * Copyright (C) 2006 Polycom, Inc.
   8 * Copyright 2010 Freescale Semiconductor, Inc.
   9 *
  10 * CPM SPI and QE buffer descriptors mode support:
  11 * Copyright (c) 2009  MontaVista Software, Inc.
  12 * Author: Anton Vorontsov <avorontsov@ru.mvista.com>
  13 *
  14 * GRLIB support:
  15 * Copyright (c) 2012 Aeroflex Gaisler AB.
  16 * Author: Andreas Larsson <andreas@gaisler.com>
  17 */
  18
  19#ifndef __SPI_FSL_SPI_H__
  20#define __SPI_FSL_SPI_H__
  21
  22/* SPI Controller registers */
  23struct fsl_spi_reg {
  24        __be32 cap; /* TYPE_GRLIB specific */
  25        u8 res1[0x1C];
  26        __be32 mode;
  27        __be32 event;
  28        __be32 mask;
  29        __be32 command;
  30        __be32 transmit;
  31        __be32 receive;
  32        __be32 slvsel; /* TYPE_GRLIB specific */
  33};
  34
  35/* SPI Controller mode register definitions */
  36#define SPMODE_LOOP             (1 << 30)
  37#define SPMODE_CI_INACTIVEHIGH  (1 << 29)
  38#define SPMODE_CP_BEGIN_EDGECLK (1 << 28)
  39#define SPMODE_DIV16            (1 << 27)
  40#define SPMODE_REV              (1 << 26)
  41#define SPMODE_MS               (1 << 25)
  42#define SPMODE_ENABLE           (1 << 24)
  43#define SPMODE_LEN(x)           ((x) << 20)
  44#define SPMODE_PM(x)            ((x) << 16)
  45#define SPMODE_OP               (1 << 14)
  46#define SPMODE_CG(x)            ((x) << 7)
  47
  48/* TYPE_GRLIB SPI Controller capability register definitions */
  49#define SPCAP_SSEN(x)           (((x) >> 16) & 0x1)
  50#define SPCAP_SSSZ(x)           (((x) >> 24) & 0xff)
  51#define SPCAP_MAXWLEN(x)        (((x) >> 20) & 0xf)
  52
  53/*
  54 * Default for SPI Mode:
  55 *      SPI MODE 0 (inactive low, phase middle, MSB, 8-bit length, slow clk
  56 */
  57#define SPMODE_INIT_VAL (SPMODE_CI_INACTIVEHIGH | SPMODE_DIV16 | SPMODE_REV | \
  58                         SPMODE_MS | SPMODE_LEN(7) | SPMODE_PM(0xf))
  59
  60/* SPIE register values */
  61#define SPIE_NE         0x00000200      /* Not empty */
  62#define SPIE_NF         0x00000100      /* Not full */
  63
  64/* SPIM register values */
  65#define SPIM_NE         0x00000200      /* Not empty */
  66#define SPIM_NF         0x00000100      /* Not full */
  67
  68#endif /* __SPI_FSL_SPI_H__ */
  69