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imx: Move some header files from arch-mxs to imx-common
[u-boot] / drivers / mtd / nand / nand.c
1 /*
2  * (C) Copyright 2005
3  * 2N Telekomunikace, a.s. <www.2n.cz>
4  * Ladislav Michl <michl@2n.cz>
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License
11  * version 2 as published by the Free Software Foundation.
12  *
13  * This program is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  * GNU General Public License for more details.
17  *
18  * You should have received a copy of the GNU General Public License
19  * along with this program; if not, write to the Free Software
20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
21  * MA 02111-1307 USA
22  */
23
24 #include <common.h>
25 #include <nand.h>
26 #include <errno.h>
27
28 #ifndef CONFIG_SYS_NAND_BASE_LIST
29 #define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE }
30 #endif
31
32 DECLARE_GLOBAL_DATA_PTR;
33
34 int nand_curr_device = -1;
35
36
37 nand_info_t nand_info[CONFIG_SYS_MAX_NAND_DEVICE];
38
39 #ifndef CONFIG_SYS_NAND_SELF_INIT
40 static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
41 static ulong base_address[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST;
42 #endif
43
44 static char dev_name[CONFIG_SYS_MAX_NAND_DEVICE][8];
45
46 static unsigned long total_nand_size; /* in kiB */
47
48 /* Register an initialized NAND mtd device with the U-Boot NAND command. */
49 int nand_register(int devnum)
50 {
51         struct mtd_info *mtd;
52
53         if (devnum >= CONFIG_SYS_MAX_NAND_DEVICE)
54                 return -EINVAL;
55
56         mtd = &nand_info[devnum];
57
58         sprintf(dev_name[devnum], "nand%d", devnum);
59         mtd->name = dev_name[devnum];
60
61 #ifdef CONFIG_MTD_DEVICE
62         /*
63          * Add MTD device so that we can reference it later
64          * via the mtdcore infrastructure (e.g. ubi).
65          */
66         add_mtd_device(mtd);
67 #endif
68
69         total_nand_size += mtd->size / 1024;
70
71         if (nand_curr_device == -1)
72                 nand_curr_device = devnum;
73
74         return 0;
75 }
76
77 #ifndef CONFIG_SYS_NAND_SELF_INIT
78 static void nand_init_chip(int i)
79 {
80         struct mtd_info *mtd = &nand_info[i];
81         struct nand_chip *nand = &nand_chip[i];
82         ulong base_addr = base_address[i];
83         int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
84
85         if (maxchips < 1)
86                 maxchips = 1;
87
88         mtd->priv = nand;
89         nand->IO_ADDR_R = nand->IO_ADDR_W = (void  __iomem *)base_addr;
90
91         if (board_nand_init(nand))
92                 return;
93
94         if (nand_scan(mtd, maxchips))
95                 return;
96
97         nand_register(i);
98 }
99 #endif
100
101 void nand_init(void)
102 {
103 #ifdef CONFIG_SYS_NAND_SELF_INIT
104         board_nand_init();
105 #else
106         int i;
107
108         for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
109                 nand_init_chip(i);
110 #endif
111
112         printf("%lu MiB\n", total_nand_size / 1024);
113
114 #ifdef CONFIG_SYS_NAND_SELECT_DEVICE
115         /*
116          * Select the chip in the board/cpu specific driver
117          */
118         board_nand_select_device(nand_info[nand_curr_device].priv, nand_curr_device);
119 #endif
120 }