include/linux/jz4780-nemc.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * JZ4780 NAND/external memory controller (NEMC)
   4  *
   5  * Copyright (c) 2015 Imagination Technologies
   6  * Author: Alex Smith <alex@alex-smith.me.uk>
   7  */
   8
   9 #ifndef __LINUX_JZ4780_NEMC_H__
  10 #define __LINUX_JZ4780_NEMC_H__
  11
  12 #include <linux/types.h>
  13
  14 struct device;
  15
  16 /*
  17  * Number of NEMC banks. Note that there are actually 6, but they are numbered
  18  * from 1.
  19  */
  20 #define JZ4780_NEMC_NUM_BANKS   7
  21
  22 /**
  23  * enum jz4780_nemc_bank_type - device types which can be connected to a bank
  24  * @JZ4780_NEMC_BANK_SRAM: SRAM
  25  * @JZ4780_NEMC_BANK_NAND: NAND
  26  */
  27 enum jz4780_nemc_bank_type {
  28         JZ4780_NEMC_BANK_SRAM,
  29         JZ4780_NEMC_BANK_NAND,
  30 };
  31
  32 extern unsigned int jz4780_nemc_num_banks(struct device *dev);
  33
  34 extern void jz4780_nemc_set_type(struct device *dev, unsigned int bank,
  35                                  enum jz4780_nemc_bank_type type);
  36 extern void jz4780_nemc_assert(struct device *dev, unsigned int bank,
  37                                bool assert);
  38
  39 #endif /* __LINUX_JZ4780_NEMC_H__ */