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9ca20a83 HS |
1 | /* |
2 | * ATNGW100 board-specific flash initialization | |
3 | * | |
4 | * Copyright (C) 2005-2006 Atmel Corporation | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 as | |
8 | * published by the Free Software Foundation. | |
9 | */ | |
10 | #include <linux/init.h> | |
11 | #include <linux/platform_device.h> | |
12 | #include <linux/mtd/mtd.h> | |
13 | #include <linux/mtd/partitions.h> | |
14 | #include <linux/mtd/physmap.h> | |
15 | ||
3663b736 | 16 | #include <mach/smc.h> |
9ca20a83 | 17 | |
af818471 | 18 | static struct smc_timing flash_timing __initdata = { |
9ca20a83 HS |
19 | .ncs_read_setup = 0, |
20 | .nrd_setup = 40, | |
21 | .ncs_write_setup = 0, | |
22 | .nwe_setup = 10, | |
23 | ||
24 | .ncs_read_pulse = 80, | |
25 | .nrd_pulse = 40, | |
26 | .ncs_write_pulse = 65, | |
27 | .nwe_pulse = 55, | |
28 | ||
29 | .read_cycle = 120, | |
30 | .write_cycle = 120, | |
af818471 | 31 | }; |
9ca20a83 | 32 | |
af818471 | 33 | static struct smc_config flash_config __initdata = { |
9ca20a83 HS |
34 | .bus_width = 2, |
35 | .nrd_controlled = 1, | |
36 | .nwe_controlled = 1, | |
37 | .byte_write = 1, | |
38 | }; | |
39 | ||
40 | static struct mtd_partition flash_parts[] = { | |
41 | { | |
42 | .name = "u-boot", | |
43 | .offset = 0x00000000, | |
44 | .size = 0x00020000, /* 128 KiB */ | |
45 | .mask_flags = MTD_WRITEABLE, | |
46 | }, | |
47 | { | |
48 | .name = "root", | |
49 | .offset = 0x00020000, | |
50 | .size = 0x007d0000, | |
51 | }, | |
52 | { | |
53 | .name = "env", | |
54 | .offset = 0x007f0000, | |
55 | .size = 0x00010000, | |
56 | .mask_flags = MTD_WRITEABLE, | |
57 | }, | |
58 | }; | |
59 | ||
60 | static struct physmap_flash_data flash_data = { | |
61 | .width = 2, | |
62 | .nr_parts = ARRAY_SIZE(flash_parts), | |
63 | .parts = flash_parts, | |
64 | }; | |
65 | ||
66 | static struct resource flash_resource = { | |
67 | .start = 0x00000000, | |
68 | .end = 0x007fffff, | |
69 | .flags = IORESOURCE_MEM, | |
70 | }; | |
71 | ||
72 | static struct platform_device flash_device = { | |
73 | .name = "physmap-flash", | |
74 | .id = 0, | |
75 | .resource = &flash_resource, | |
76 | .num_resources = 1, | |
77 | .dev = { | |
78 | .platform_data = &flash_data, | |
79 | }, | |
80 | }; | |
81 | ||
82 | /* This needs to be called after the SMC has been initialized */ | |
83 | static int __init atngw100_flash_init(void) | |
84 | { | |
85 | int ret; | |
86 | ||
af818471 | 87 | smc_set_timing(&flash_config, &flash_timing); |
9ca20a83 HS |
88 | ret = smc_set_configuration(0, &flash_config); |
89 | if (ret < 0) { | |
90 | printk(KERN_ERR "atngw100: failed to set NOR flash timing\n"); | |
91 | return ret; | |
92 | } | |
93 | ||
94 | platform_device_register(&flash_device); | |
95 | ||
96 | return 0; | |
97 | } | |
98 | device_initcall(atngw100_flash_init); |