include/linux/mtd/spear_smi.h

   1 /*
   2  * Copyright © 2010 ST Microelectronics
   3  * Shiraz Hashim <shiraz.linux.kernel@gmail.com>
   4  *
   5  * This file is licensed under the terms of the GNU General Public
   6  * License version 2. This program is licensed "as is" without any
   7  * warranty of any kind, whether express or implied.
   8  */
   9
  10 #ifndef __MTD_SPEAR_SMI_H
  11 #define __MTD_SPEAR_SMI_H
  12
  13 #include <linux/types.h>
  14 #include <linux/mtd/mtd.h>
  15 #include <linux/mtd/partitions.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/of.h>
  18
  19 /* max possible slots for serial-nor flash chip in the SMI controller */
  20 #define MAX_NUM_FLASH_CHIP      4
  21
  22 /* macro to define partitions for flash devices */
  23 #define DEFINE_PARTS(n, of, s)          \
  24 {                                       \
  25         .name = n,                      \
  26         .offset = of,                   \
  27         .size = s,                      \
  28 }
  29
  30 /**
  31  * struct spear_smi_flash_info - platform structure for passing flash
  32  * information
  33  *
  34  * name: name of the serial nor flash for identification
  35  * mem_base: the memory base on which the flash is mapped
  36  * size: size of the flash in bytes
  37  * partitions: parition details
  38  * nr_partitions: number of partitions
  39  * fast_mode: whether flash supports fast mode
  40  */
  41
  42 struct spear_smi_flash_info {
  43         char *name;
  44         unsigned long mem_base;
  45         unsigned long size;
  46         struct mtd_partition *partitions;
  47         int nr_partitions;
  48         u8 fast_mode;
  49 };
  50
  51 /**
  52  * struct spear_smi_plat_data - platform structure for configuring smi
  53  *
  54  * clk_rate: clk rate at which SMI must operate
  55  * num_flashes: number of flashes present on board
  56  * board_flash_info: specific details of each flash present on board
  57  */
  58 struct spear_smi_plat_data {
  59         unsigned long clk_rate;
  60         int num_flashes;
  61         struct spear_smi_flash_info *board_flash_info;
  62         struct device_node *np[MAX_NUM_FLASH_CHIP];
  63 };
  64
  65 #endif /* __MTD_SPEAR_SMI_H */