1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
--- a/drivers/mtd/maps/Kconfig
+++ b/drivers/mtd/maps/Kconfig
@@ -260,6 +260,12 @@
Support for parsing CFE image tag and creating MTD partitions on
Broadcom BCM63xx boards.
+config MTD_LANTIQ
+ bool "Lantiq SoC NOR support"
+ depends on LANTIQ && MTD_PARTITIONS
+ help
+ Support for NOR flsh chips on Lantiq SoC
+
config MTD_DILNETPC
tristate "CFI Flash device mapped on DIL/Net PC"
depends on X86 && MTD_CONCAT && MTD_PARTITIONS && MTD_CFI_INTELEXT && BROKEN
--- a/drivers/mtd/maps/Makefile
+++ b/drivers/mtd/maps/Makefile
@@ -59,3 +59,4 @@
obj-$(CONFIG_MTD_VMU) += vmu-flash.o
obj-$(CONFIG_MTD_GPIO_ADDR) += gpio-addr-flash.o
obj-$(CONFIG_MTD_BCM963XX) += bcm963xx-flash.o
+obj-$(CONFIG_MTD_LANTIQ) += lantiq.o
--- /dev/null
+++ b/drivers/mtd/maps/lantiq.c
@@ -0,0 +1,183 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * Copyright (C) 2004 Liu Peng Infineon IFAP DC COM CPE
+ * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/cfi.h>
+#include <linux/magic.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/physmap.h>
+#include <linux/mtd/cfi.h>
+
+#include <lantiq.h>
+#include <lantiq_platform.h>
+
+#ifdef CONFIG_SOC_LANTIQ_XWAY
+#include <xway.h>
+#endif
+static int ltq_mtd_probing;
+
+static map_word
+lq_read16(struct map_info *map, unsigned long adr)
+{
+ unsigned long flags;
+ map_word temp;
+ spin_lock_irqsave(&ebu_lock, flags);
+ if (ltq_mtd_probing)
+ adr ^= 2;
+ temp.x[0] = *((__u16 *)(map->virt + adr));
+ spin_unlock_irqrestore(&ebu_lock, flags);
+ return temp;
+}
+
+static void
+lq_write16(struct map_info *map, map_word d, unsigned long adr)
+{
+ unsigned long flags;
+ spin_lock_irqsave(&ebu_lock, flags);
+ if (ltq_mtd_probing)
+ adr ^= 2;
+ *((__u16 *)(map->virt + adr)) = d.x[0];
+ spin_unlock_irqrestore(&ebu_lock, flags);
+}
+
+void
+lq_copy_from(struct map_info *map, void *to,
+ unsigned long from, ssize_t len)
+{
+ unsigned char *p;
+ unsigned char *to_8;
+ unsigned long flags;
+ spin_lock_irqsave(&ebu_lock, flags);
+ from = (unsigned long)(from + map->virt);
+ p = (unsigned char *) from;
+ to_8 = (unsigned char *) to;
+ while (len--)
+ *to_8++ = *p++;
+ spin_unlock_irqrestore(&ebu_lock, flags);
+}
+
+void
+lq_copy_to(struct map_info *map, unsigned long to,
+ const void *from, ssize_t len)
+{
+ unsigned char *p = (unsigned char *)from;
+ unsigned char *to_8;
+ unsigned long flags;
+ spin_lock_irqsave(&ebu_lock, flags);
+ to += (unsigned long) map->virt;
+ to_8 = (unsigned char *)to;
+ while (len--)
+ *p++ = *to_8++;
+ spin_unlock_irqrestore(&ebu_lock, flags);
+}
+
+static const char *part_probe_types[] = { "cmdlinepart", NULL };
+
+static struct map_info lq_map = {
+ .name = "lq_nor",
+ .bankwidth = 2,
+ .read = lq_read16,
+ .write = lq_write16,
+ .copy_from = lq_copy_from,
+ .copy_to = lq_copy_to,
+};
+
+static int
+lq_mtd_probe(struct platform_device *pdev)
+{
+ struct physmap_flash_data *lq_mtd_data =
+ (struct physmap_flash_data*) dev_get_platdata(&pdev->dev);
+ struct mtd_info *lq_mtd = NULL;
+ struct mtd_partition *parts = NULL;
+ struct resource *res = 0;
+ int nr_parts = 0;
+ struct cfi_private *cfi;
+
+#ifdef CONFIG_SOC_LANTIQ_XWAY
+ lq_w32(lq_r32(LQ_EBU_BUSCON0) & ~EBU_WRDIS, LQ_EBU_BUSCON0);
+#endif
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if(!res)
+ {
+ dev_err(&pdev->dev, "failed to get memory resource");
+ return -ENOENT;
+ }
+ res = request_mem_region(res->start, resource_size(res),
+ dev_name(&pdev->dev));
+ if(!res)
+ {
+ dev_err(&pdev->dev, "failed to request mem resource");
+ return -EBUSY;
+ }
+
+ lq_map.phys = res->start;
+ lq_map.size = resource_size(res);
+ lq_map.virt = ioremap_nocache(lq_map.phys, lq_map.size);
+
+ if (!lq_map.virt ) {
+ dev_err(&pdev->dev, "failed to ioremap!\n");
+ return -EIO;
+ }
+
+ ltq_mtd_probing = 1;
+ lq_mtd = (struct mtd_info *) do_map_probe("cfi_probe", &lq_map);
+ ltq_mtd_probing = 0;
+ if (!lq_mtd) {
+ iounmap(lq_map.virt);
+ dev_err(&pdev->dev, "probing failed\n");
+ return -ENXIO;
+ }
+
+ lq_mtd->owner = THIS_MODULE;
+ cfi = lq_map.fldrv_priv;
+ cfi->addr_unlock1 ^= 1;
+ cfi->addr_unlock2 ^= 1;
+
+ nr_parts = parse_mtd_partitions(lq_mtd, part_probe_types, &parts, 0);
+ if (nr_parts > 0) {
+ dev_info(&pdev->dev, "using %d partitions from cmdline", nr_parts);
+ } else {
+ nr_parts = lq_mtd_data->nr_parts;
+ parts = lq_mtd_data->parts;
+ }
+
+ add_mtd_partitions(lq_mtd, parts, nr_parts);
+ return 0;
+}
+
+static struct platform_driver lq_mtd_driver = {
+ .probe = lq_mtd_probe,
+ .driver = {
+ .name = "lq_nor",
+ .owner = THIS_MODULE,
+ },
+};
+
+int __init
+init_lq_mtd(void)
+{
+ int ret = platform_driver_register(&lq_mtd_driver);
+ if (ret)
+ printk(KERN_INFO "lq_nor: error registering platfom driver");
+ return ret;
+}
+
+module_init(init_lq_mtd);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
+MODULE_DESCRIPTION("Lantiq SoC NOR");
|
