Commit | Line | Data |
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2a1dba29 TP |
1 | /* |
2 | * drivers/mtd/nand/orion_nand.c | |
3 | * | |
4 | * NAND support for Marvell Orion SoC platforms | |
5 | * | |
6 | * Tzachi Perelstein <tzachi@marvell.com> | |
7 | * | |
8 | * This file is licensed under the terms of the GNU General Public | |
9 | * License version 2. This program is licensed "as is" without any | |
10 | * warranty of any kind, whether express or implied. | |
11 | */ | |
12 | ||
13 | #include <linux/slab.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/platform_device.h> | |
16 | #include <linux/mtd/mtd.h> | |
17 | #include <linux/mtd/nand.h> | |
18 | #include <linux/mtd/partitions.h> | |
19 | #include <asm/io.h> | |
20 | #include <asm/sizes.h> | |
2a1dba29 | 21 | #include <asm/arch/hardware.h> |
5d4294c5 | 22 | #include <asm/plat-orion/orion_nand.h> |
2a1dba29 TP |
23 | |
24 | #ifdef CONFIG_MTD_CMDLINE_PARTS | |
25 | static const char *part_probes[] = { "cmdlinepart", NULL }; | |
26 | #endif | |
27 | ||
28 | static void orion_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl) | |
29 | { | |
30 | struct nand_chip *nc = mtd->priv; | |
31 | struct orion_nand_data *board = nc->priv; | |
32 | u32 offs; | |
33 | ||
34 | if (cmd == NAND_CMD_NONE) | |
35 | return; | |
36 | ||
37 | if (ctrl & NAND_CLE) | |
38 | offs = (1 << board->cle); | |
39 | else if (ctrl & NAND_ALE) | |
40 | offs = (1 << board->ale); | |
41 | else | |
42 | return; | |
43 | ||
44 | if (nc->options & NAND_BUSWIDTH_16) | |
45 | offs <<= 1; | |
46 | ||
47 | writeb(cmd, nc->IO_ADDR_W + offs); | |
48 | } | |
49 | ||
50 | static int __init orion_nand_probe(struct platform_device *pdev) | |
51 | { | |
52 | struct mtd_info *mtd; | |
53 | struct nand_chip *nc; | |
54 | struct orion_nand_data *board; | |
55 | void __iomem *io_base; | |
56 | int ret = 0; | |
57 | #ifdef CONFIG_MTD_PARTITIONS | |
58 | struct mtd_partition *partitions = NULL; | |
59 | int num_part = 0; | |
60 | #endif | |
61 | ||
62 | nc = kzalloc(sizeof(struct nand_chip) + sizeof(struct mtd_info), GFP_KERNEL); | |
63 | if (!nc) { | |
64 | printk(KERN_ERR "orion_nand: failed to allocate device structure.\n"); | |
65 | ret = -ENOMEM; | |
66 | goto no_res; | |
67 | } | |
68 | mtd = (struct mtd_info *)(nc + 1); | |
69 | ||
70 | io_base = ioremap(pdev->resource[0].start, | |
71 | pdev->resource[0].end - pdev->resource[0].start + 1); | |
72 | if (!io_base) { | |
73 | printk(KERN_ERR "orion_nand: ioremap failed\n"); | |
74 | ret = -EIO; | |
75 | goto no_res; | |
76 | } | |
77 | ||
78 | board = pdev->dev.platform_data; | |
79 | ||
80 | mtd->priv = nc; | |
81 | mtd->owner = THIS_MODULE; | |
82 | ||
83 | nc->priv = board; | |
84 | nc->IO_ADDR_R = nc->IO_ADDR_W = io_base; | |
85 | nc->cmd_ctrl = orion_nand_cmd_ctrl; | |
86 | nc->ecc.mode = NAND_ECC_SOFT; | |
87 | ||
f4db56ff SB |
88 | if (board->chip_delay) |
89 | nc->chip_delay = board->chip_delay; | |
90 | ||
2a1dba29 TP |
91 | if (board->width == 16) |
92 | nc->options |= NAND_BUSWIDTH_16; | |
93 | ||
94 | platform_set_drvdata(pdev, mtd); | |
95 | ||
96 | if (nand_scan(mtd, 1)) { | |
97 | ret = -ENXIO; | |
98 | goto no_dev; | |
99 | } | |
100 | ||
101 | #ifdef CONFIG_MTD_PARTITIONS | |
102 | #ifdef CONFIG_MTD_CMDLINE_PARTS | |
103 | mtd->name = "orion_nand"; | |
104 | num_part = parse_mtd_partitions(mtd, part_probes, &partitions, 0); | |
105 | #endif | |
106 | /* If cmdline partitions have been passed, let them be used */ | |
107 | if (num_part <= 0) { | |
108 | num_part = board->nr_parts; | |
109 | partitions = board->parts; | |
110 | } | |
111 | ||
112 | if (partitions && num_part > 0) | |
113 | ret = add_mtd_partitions(mtd, partitions, num_part); | |
114 | else | |
115 | ret = add_mtd_device(mtd); | |
116 | #else | |
117 | ret = add_mtd_device(mtd); | |
118 | #endif | |
119 | ||
120 | if (ret) { | |
121 | nand_release(mtd); | |
122 | goto no_dev; | |
123 | } | |
124 | ||
125 | return 0; | |
126 | ||
127 | no_dev: | |
128 | platform_set_drvdata(pdev, NULL); | |
129 | iounmap(io_base); | |
130 | no_res: | |
131 | kfree(nc); | |
132 | ||
133 | return ret; | |
134 | } | |
135 | ||
136 | static int __devexit orion_nand_remove(struct platform_device *pdev) | |
137 | { | |
138 | struct mtd_info *mtd = platform_get_drvdata(pdev); | |
139 | struct nand_chip *nc = mtd->priv; | |
140 | ||
141 | nand_release(mtd); | |
142 | ||
143 | iounmap(nc->IO_ADDR_W); | |
144 | ||
145 | kfree(nc); | |
146 | ||
147 | return 0; | |
148 | } | |
149 | ||
150 | static struct platform_driver orion_nand_driver = { | |
151 | .probe = orion_nand_probe, | |
152 | .remove = orion_nand_remove, | |
153 | .driver = { | |
154 | .name = "orion_nand", | |
155 | .owner = THIS_MODULE, | |
156 | }, | |
157 | }; | |
158 | ||
159 | static int __init orion_nand_init(void) | |
160 | { | |
161 | return platform_driver_register(&orion_nand_driver); | |
162 | } | |
163 | ||
164 | static void __exit orion_nand_exit(void) | |
165 | { | |
166 | platform_driver_unregister(&orion_nand_driver); | |
167 | } | |
168 | ||
169 | module_init(orion_nand_init); | |
170 | module_exit(orion_nand_exit); | |
171 | ||
172 | MODULE_LICENSE("GPL"); | |
173 | MODULE_AUTHOR("Tzachi Perelstein"); | |
174 | MODULE_DESCRIPTION("NAND glue for Orion platforms"); | |
1ff18422 | 175 | MODULE_ALIAS("platform:orion_nand"); |