src/include/device/dram/rcd.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #ifndef DEVICE_DRAM_RCD_H
   4 #define DEVICE_DRAM_RCD_H
   5
   6 #include <types.h>
   7 #include <device/i2c_simple.h>
   8
   9 enum rcw_idx {
  10         VEN_ID_L,
  11         VEN_ID_H,
  12         DEV_ID_L,
  13         DEV_ID_H,
  14         REV_ID,
  15         RES_05,
  16         RES_06,
  17         RES_07,
  18         F0RC00_01,
  19         F0RC02_03,
  20         F0RC04_05,
  21         F0RC06_07,
  22         F0RC08_09,
  23         F0RC0A_0B,
  24         F0RC0C_0D,
  25         F0RC0E_0F,
  26         F0RC1x,
  27         F0RC2x,
  28         F0RC3x,
  29         F0RC4x,
  30         F0RC5x,
  31         F0RC6x,
  32         F0RC7x,
  33         F0RC8x,
  34         F0RC9x,
  35         F0RCAx,
  36         F0RCBx,
  37         F0RCCx,
  38         F0RCDx,
  39         F0RCEx,
  40         F0RCFx,
  41         RCW_ALL,        /* Total num of bytes */
  42         RCW_ALL_ALIGNED /* Total num of bytes after aligning to 4B */
  43 };
  44
  45 _Static_assert(RCW_ALL_ALIGNED % sizeof(uint32_t) == 0,
  46                "RCW_ALL_ALIGNED is not aligned");
  47
  48 /* Write an 8-bit register. Returns the number of written bytes. */
  49 int rcd_write_reg(unsigned int bus, uint8_t slave, enum rcw_idx reg,
  50                   uint8_t data);
  51
  52 /* Write 32 bits of memory (i.e., four 8-bit registers, not 1 32-bit register, which would
  53  * involve byte swapping). Returns the number of written bytes. */
  54 int rcd_write_32b(unsigned int bus, uint8_t slave, enum rcw_idx reg,
  55                   uint32_t data);
  56
  57 /* Dump 32 bytes of RCD onto the screen. */
  58 void dump_rcd(unsigned int bus, uint8_t addr);
  59
  60 #endif /* DEVICE_DRAM_RCD_H */