drivers/spi/ich.h

   1 /*
   2  * Copyright (c) 2011 The Chromium OS Authors.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  *
   6  * This file is derived from the flashrom project.
   7  */
   8
   9 struct ich7_spi_regs {
  10         uint16_t spis;
  11         uint16_t spic;
  12         uint32_t spia;
  13         uint64_t spid[8];
  14         uint64_t _pad;
  15         uint32_t bbar;
  16         uint16_t preop;
  17         uint16_t optype;
  18         uint8_t opmenu[8];
  19 } __packed;
  20
  21 struct ich9_spi_regs {
  22         uint32_t bfpr;                  /* 0x00 */
  23         uint16_t hsfs;
  24         uint16_t hsfc;
  25         uint32_t faddr;
  26         uint32_t _reserved0;
  27         uint32_t fdata[16];             /* 0x10 */
  28         uint32_t frap;                  /* 0x50 */
  29         uint32_t freg[5];
  30         uint32_t _reserved1[3];
  31         uint32_t pr[5];                 /* 0x74 */
  32         uint32_t _reserved2[2];
  33         uint8_t ssfs;                   /* 0x90 */
  34         uint8_t ssfc[3];
  35         uint16_t preop;                 /* 0x94 */
  36         uint16_t optype;
  37         uint8_t opmenu[8];              /* 0x98 */
  38         uint32_t bbar;
  39         uint8_t _reserved3[12];
  40         uint32_t fdoc;                  /* 0xb0 */
  41         uint32_t fdod;
  42         uint8_t _reserved4[8];
  43         uint32_t afc;                   /* 0xc0 */
  44         uint32_t lvscc;
  45         uint32_t uvscc;
  46         uint8_t _reserved5[4];
  47         uint32_t fpb;                   /* 0xd0 */
  48         uint8_t _reserved6[28];
  49         uint32_t srdl;                  /* 0xf0 */
  50         uint32_t srdc;
  51         uint32_t scs;
  52         uint32_t bcr;
  53 } __packed;
  54
  55 enum {
  56         SPIS_SCIP =             0x0001,
  57         SPIS_GRANT =            0x0002,
  58         SPIS_CDS =              0x0004,
  59         SPIS_FCERR =            0x0008,
  60         SSFS_AEL =              0x0010,
  61         SPIS_LOCK =             0x8000,
  62         SPIS_RESERVED_MASK =    0x7ff0,
  63         SSFS_RESERVED_MASK =    0x7fe2
  64 };
  65
  66 enum {
  67         SPIC_SCGO =             0x000002,
  68         SPIC_ACS =              0x000004,
  69         SPIC_SPOP =             0x000008,
  70         SPIC_DBC =              0x003f00,
  71         SPIC_DS =               0x004000,
  72         SPIC_SME =              0x008000,
  73         SSFC_SCF_MASK =         0x070000,
  74         SSFC_RESERVED =         0xf80000,
  75
  76         /* Mask for speed byte, biuts 23:16 of SSFC */
  77         SSFC_SCF_33MHZ  =       0x01,
  78 };
  79
  80 enum {
  81         HSFS_FDONE =            0x0001,
  82         HSFS_FCERR =            0x0002,
  83         HSFS_AEL =              0x0004,
  84         HSFS_BERASE_MASK =      0x0018,
  85         HSFS_BERASE_SHIFT =     3,
  86         HSFS_SCIP =             0x0020,
  87         HSFS_FDOPSS =           0x2000,
  88         HSFS_FDV =              0x4000,
  89         HSFS_FLOCKDN =          0x8000
  90 };
  91
  92 enum {
  93         HSFC_FGO =              0x0001,
  94         HSFC_FCYCLE_MASK =      0x0006,
  95         HSFC_FCYCLE_SHIFT =     1,
  96         HSFC_FDBC_MASK =        0x3f00,
  97         HSFC_FDBC_SHIFT =       8,
  98         HSFC_FSMIE =            0x8000
  99 };
 100
 101 enum {
 102         SPI_OPCODE_TYPE_READ_NO_ADDRESS =       0,
 103         SPI_OPCODE_TYPE_WRITE_NO_ADDRESS =      1,
 104         SPI_OPCODE_TYPE_READ_WITH_ADDRESS =     2,
 105         SPI_OPCODE_TYPE_WRITE_WITH_ADDRESS =    3
 106 };
 107
 108 enum {
 109         ICH_MAX_CMD_LEN         = 5,
 110 };
 111
 112 struct spi_trans {
 113         uint8_t cmd[ICH_MAX_CMD_LEN];
 114         int cmd_len;
 115         const uint8_t *out;
 116         uint32_t bytesout;
 117         uint8_t *in;
 118         uint32_t bytesin;
 119         uint8_t type;
 120         uint8_t opcode;
 121         uint32_t offset;
 122 };
 123
 124 struct ich_spi_slave {
 125         struct spi_slave slave;
 126         struct spi_trans trans; /* current transaction in progress */
 127         int speed;              /* SPI speed in Hz */
 128 };