5 * Flexible Static Memory Controller (FSMC)
6 * platform data interface and header file
8 * Copyright © 2010 ST Microelectronics
9 * Vipin Kumar <vipin.kumar@st.com>
11 * This file is licensed under the terms of the GNU General Public
12 * License version 2. This program is licensed "as is" without any
13 * warranty of any kind, whether express or implied.
20 #include <linux/platform_device.h>
21 #include <linux/mtd/physmap.h>
22 #include <linux/types.h>
23 #include <linux/mtd/partitions.h>
24 #include <asm/param.h>
26 #define FSMC_NAND_BW8 1
27 #define FSMC_NAND_BW16 2
29 #define FSMC_MAX_NOR_BANKS 4
30 #define FSMC_MAX_NAND_BANKS 4
32 #define FSMC_FLASH_WIDTH8 1
33 #define FSMC_FLASH_WIDTH16 2
35 /* fsmc controller registers for NOR flash */
37 /* ctrl register definitions */
38 #define BANK_ENABLE (1 << 0)
39 #define MUXED (1 << 1)
40 #define NOR_DEV (2 << 2)
41 #define WIDTH_8 (0 << 4)
42 #define WIDTH_16 (1 << 4)
43 #define RSTPWRDWN (1 << 6)
44 #define WPROT (1 << 7)
45 #define WRT_ENABLE (1 << 12)
46 #define WAIT_ENB (1 << 13)
49 /* ctrl_tim register definitions */
51 #define FSMC_NOR_BANK_SZ 0x8
52 #define FSMC_NOR_REG_SIZE 0x40
54 #define FSMC_NOR_REG(base, bank, reg) (base + \
55 FSMC_NOR_BANK_SZ * (bank) + \
58 /* fsmc controller registers for NAND flash */
60 /* pc register definitions */
61 #define FSMC_RESET (1 << 0)
62 #define FSMC_WAITON (1 << 1)
63 #define FSMC_ENABLE (1 << 2)
64 #define FSMC_DEVTYPE_NAND (1 << 3)
65 #define FSMC_DEVWID_8 (0 << 4)
66 #define FSMC_DEVWID_16 (1 << 4)
67 #define FSMC_ECCEN (1 << 6)
68 #define FSMC_ECCPLEN_512 (0 << 7)
69 #define FSMC_ECCPLEN_256 (1 << 7)
70 #define FSMC_TCLR_1 (1)
71 #define FSMC_TCLR_SHIFT (9)
72 #define FSMC_TCLR_MASK (0xF)
73 #define FSMC_TAR_1 (1)
74 #define FSMC_TAR_SHIFT (13)
75 #define FSMC_TAR_MASK (0xF)
77 /* sts register definitions */
78 #define FSMC_CODE_RDY (1 << 15)
80 /* comm register definitions */
82 #define FSMC_TSET_SHIFT 0
83 #define FSMC_TSET_MASK 0xFF
84 #define FSMC_TWAIT_6 6
85 #define FSMC_TWAIT_SHIFT 8
86 #define FSMC_TWAIT_MASK 0xFF
87 #define FSMC_THOLD_4 4
88 #define FSMC_THOLD_SHIFT 16
89 #define FSMC_THOLD_MASK 0xFF
91 #define FSMC_THIZ_SHIFT 24
92 #define FSMC_THIZ_MASK 0xFF
98 #define FSMC_NAND_BANK_SZ 0x20
100 #define FSMC_NAND_REG(base, bank, reg) (base + FSMC_NOR_REG_SIZE + \
101 (FSMC_NAND_BANK_SZ * (bank)) + \
104 #define FSMC_BUSY_WAIT_TIMEOUT (1 * HZ)
107 * There are 13 bytes of ecc for every 512 byte block in FSMC version 8
108 * and it has to be read consecutively and immediately after the 512
109 * byte data block for hardware to generate the error bit offsets
110 * Managing the ecc bytes in the following way is easier. This way is
111 * similar to oobfree structure maintained already in u-boot nand driver
113 #define MAX_ECCPLACE_ENTRIES 32
115 struct fsmc_nand_eccplace {
120 struct fsmc_eccplace {
121 struct fsmc_nand_eccplace eccplace[MAX_ECCPLACE_ENTRIES];
124 struct fsmc_nand_timings {
139 * fsmc_nand_platform_data - platform specific NAND controller config
140 * @nand_timings: timing setup for the physical NAND interface
141 * @partitions: partition table for the platform, use a default fallback
143 * @nr_partitions: the number of partitions in the previous entry
144 * @options: different options for the driver
146 * @bank: default bank
147 * @select_bank: callback to select a certain bank, this is
148 * platform-specific. If the controller only supports one bank
149 * this may be set to NULL
151 struct fsmc_nand_platform_data {
152 struct fsmc_nand_timings *nand_timings;
153 struct mtd_partition *partitions;
154 unsigned int nr_partitions;
155 unsigned int options;
159 enum access_mode mode;
161 void (*select_bank)(uint32_t bank, uint32_t busw);
163 /* priv structures for dma accesses */
165 void *write_dma_priv;
168 extern int __init fsmc_nor_init(struct platform_device *pdev,
169 unsigned long base, uint32_t bank, uint32_t width);
170 extern void __init fsmc_init_board_info(struct platform_device *pdev,
171 struct mtd_partition *partitions, unsigned int nr_partitions,
174 #endif /* __MTD_FSMC_H */