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
|
S3C24XX ARM Linux Overview
==========================
Introduction
------------
The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported
by the 's3c2410' architecture of ARM Linux. Currently the S3C2410 and
the S3C2440 are supported CPUs.
Configuration
-------------
A generic S3C2410 configuration is provided, and can be used as the
default by `make s3c2410_defconfig`. This configuration has support
for all the machines, and the commonly used features on them.
Certain machines may have their own default configurations as well,
please check the machine specific documentation.
Machines
--------
The currently supported machines are as follows:
Simtec Electronics EB2410ITX (BAST)
A general purpose development board, see EB2410ITX.txt for further
details
Samsung SMDK2410
Samsung's own development board, geared for PDA work.
Samsung/Meritech SMDK2440
The S3C2440 compatible version of the SMDK2440
Thorcom VR1000
Custom embedded board
HP IPAQ 1940
Handheld (IPAQ), available in several varieties
HP iPAQ rx3715
S3C2440 based IPAQ, with a number of variations depending on
features shipped.
Acer N30
A S3C2410 based PDA from Acer. There is a Wiki page at
http://handhelds.org/moin/moin.cgi/AcerN30Documentation .
Adding New Machines
-------------------
The archicture has been designed to support as many machines as can
be configured for it in one kernel build, and any future additions
should keep this in mind before altering items outside of their own
machine files.
Machine definitions should be kept in linux/arch/arm/mach-s3c2410,
and there are a number of examples that can be looked at.
Read the kernel patch submission policies as well as the
Documentation/arm directory before submitting patches. The
ARM kernel series is managed by Russell King, and has a patch system
located at http://www.arm.linux.org.uk/developer/patches/
as well as mailing lists that can be found from the same site.
As a courtesy, please notify <ben-linux@fluff.org> of any new
machines or other modifications.
Any large scale modifications, or new drivers should be discussed
on the ARM kernel mailing list (linux-arm-kernel) before being
attempted. See http://www.arm.linux.org.uk/mailinglists/ for the
mailing list information.
NAND
----
The current kernels now have support for the s3c2410 NAND
controller. If there are any problems the latest linux-mtd
CVS can be found from http://www.linux-mtd.infradead.org/
Serial
------
The s3c2410 serial driver provides support for the internal
serial ports. These devices appear as /dev/ttySAC0 through 3.
To create device nodes for these, use the following commands
mknod ttySAC0 c 204 64
mknod ttySAC1 c 204 65
mknod ttySAC2 c 204 66
GPIO
----
The core contains support for manipulating the GPIO, see the
documentation in GPIO.txt in the same directory as this file.
Clock Management
----------------
The core provides the interface defined in the header file
include/asm-arm/hardware/clock.h, to allow control over the
various clock units
Platform Data
-------------
Whenever a device has platform specific data that is specified
on a per-machine basis, care should be taken to ensure the
following:
1) that default data is not left in the device to confuse the
driver if a machine does not set it at startup
2) the data should (if possible) be marked as __initdata,
to ensure that the data is thrown away if the machine is
not the one currently in use.
The best way of doing this is to make a function that
kmalloc()s an area of memory, and copies the __initdata
and then sets the relevant device's platform data. Making
the function `__init` takes care of ensuring it is discarded
with the rest of the initialisation code
static __init void s3c24xx_xxx_set_platdata(struct xxx_data *pd)
{
struct s3c2410_xxx_mach_info *npd;
npd = kmalloc(sizeof(struct s3c2410_xxx_mach_info), GFP_KERNEL);
if (npd) {
memcpy(npd, pd, sizeof(struct s3c2410_xxx_mach_info));
s3c_device_xxx.dev.platform_data = npd;
} else {
printk(KERN_ERR "no memory for xxx platform data\n");
}
}
Note, since the code is marked as __init, it should not be
exported outside arch/arm/mach-s3c2410/, or exported to
modules via EXPORT_SYMBOL() and related functions.
Port Contributors
-----------------
Ben Dooks (BJD)
Vincent Sanders
Herbert Potzl
Arnaud Patard (RTP)
Roc Wu
Klaus Fetscher
Dimitry Andric
Shannon Holland
Guillaume Gourat (NexVision)
Christer Weinigel (wingel) (Acer N30)
Lucas Correia Villa Real (S3C2400 port)
Document Changes
----------------
05 Sep 2004 - BJD - Added Document Changes section
05 Sep 2004 - BJD - Added Klaus Fetscher to list of contributors
25 Oct 2004 - BJD - Added Dimitry Andric to list of contributors
25 Oct 2004 - BJD - Updated the MTD from the 2.6.9 merge
21 Jan 2005 - BJD - Added rx3715, added Shannon to contributors
10 Feb 2005 - BJD - Added Guillaume Gourat to contributors
02 Mar 2005 - BJD - Added SMDK2440 to list of machines
06 Mar 2005 - BJD - Added Christer Weinigel
08 Mar 2005 - BJD - Added LCVR to list of people, updated introduction
08 Mar 2005 - BJD - Added section on adding machines
09 Sep 2005 - BJD - Added section on platform data
Document Author
---------------
Ben Dooks, (c) 2004-2005 Simtec Electronics
|
