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
42struct 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 * @np: array of DT node pointers for all possible flash chip devices
58 */
59struct spear_smi_plat_data {
60	unsigned long clk_rate;
61	int num_flashes;
62	struct spear_smi_flash_info *board_flash_info;
63	struct device_node *np[MAX_NUM_FLASH_CHIP];
64};
65
66#endif /* __MTD_SPEAR_SMI_H */