1 S3C24XX ARM Linux Overview
2 ==========================
9 The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported
10 by the 's3c2410' architecture of ARM Linux. Currently the S3C2410 and
11 the S3C2440 are supported CPUs.
17 A generic S3C2410 configuration is provided, and can be used as the
18 default by `make s3c2410_defconfig`. This configuration has support
19 for all the machines, and the commonly used features on them.
21 Certain machines may have their own default configurations as well,
22 please check the machine specific documentation.
28 The currently supported machines are as follows:
30 Simtec Electronics EB2410ITX (BAST)
32 A general purpose development board, see EB2410ITX.txt for further
37 Samsung's own development board, geared for PDA work.
39 Samsung/Meritech SMDK2440
41 The S3C2440 compatible version of the SMDK2440
49 Handheld (IPAQ), available in several varieties
53 S3C2440 based IPAQ, with a number of variations depending on
58 A S3C2410 based PDA from Acer. There is a Wiki page at
59 http://handhelds.org/moin/moin.cgi/AcerN30Documentation .
65 The archicture has been designed to support as many machines as can
66 be configured for it in one kernel build, and any future additions
67 should keep this in mind before altering items outside of their own
70 Machine definitions should be kept in linux/arch/arm/mach-s3c2410,
71 and there are a number of examples that can be looked at.
73 Read the kernel patch submission policies as well as the
74 Documentation/arm directory before submitting patches. The
75 ARM kernel series is managed by Russell King, and has a patch system
76 located at http://www.arm.linux.org.uk/developer/patches/
77 as well as mailing lists that can be found from the same site.
79 As a courtesy, please notify <ben-linux@fluff.org> of any new
80 machines or other modifications.
82 Any large scale modifications, or new drivers should be discussed
83 on the ARM kernel mailing list (linux-arm-kernel) before being
84 attempted. See http://www.arm.linux.org.uk/mailinglists/ for the
85 mailing list information.
91 The current kernels now have support for the s3c2410 NAND
92 controller. If there are any problems the latest linux-mtd
93 CVS can be found from http://www.linux-mtd.infradead.org/
99 The s3c2410 serial driver provides support for the internal
100 serial ports. These devices appear as /dev/ttySAC0 through 3.
102 To create device nodes for these, use the following commands
104 mknod ttySAC0 c 204 64
105 mknod ttySAC1 c 204 65
106 mknod ttySAC2 c 204 66
112 The core contains support for manipulating the GPIO, see the
113 documentation in GPIO.txt in the same directory as this file.
119 The core provides the interface defined in the header file
120 include/asm-arm/hardware/clock.h, to allow control over the
127 Whenever a device has platform specific data that is specified
128 on a per-machine basis, care should be taken to ensure the
131 1) that default data is not left in the device to confuse the
132 driver if a machine does not set it at startup
134 2) the data should (if possible) be marked as __initdata,
135 to ensure that the data is thrown away if the machine is
136 not the one currently in use.
138 The best way of doing this is to make a function that
139 kmalloc()s an area of memory, and copies the __initdata
140 and then sets the relevant device's platform data. Making
141 the function `__init` takes care of ensuring it is discarded
142 with the rest of the initialisation code
144 static __init void s3c24xx_xxx_set_platdata(struct xxx_data *pd)
146 struct s3c2410_xxx_mach_info *npd;
148 npd = kmalloc(sizeof(struct s3c2410_xxx_mach_info), GFP_KERNEL);
150 memcpy(npd, pd, sizeof(struct s3c2410_xxx_mach_info));
151 s3c_device_xxx.dev.platform_data = npd;
153 printk(KERN_ERR "no memory for xxx platform data\n");
157 Note, since the code is marked as __init, it should not be
158 exported outside arch/arm/mach-s3c2410/, or exported to
159 modules via EXPORT_SYMBOL() and related functions.
172 Guillaume Gourat (NexVision)
173 Christer Weinigel (wingel) (Acer N30)
174 Lucas Correia Villa Real (S3C2400 port)
180 05 Sep 2004 - BJD - Added Document Changes section
181 05 Sep 2004 - BJD - Added Klaus Fetscher to list of contributors
182 25 Oct 2004 - BJD - Added Dimitry Andric to list of contributors
183 25 Oct 2004 - BJD - Updated the MTD from the 2.6.9 merge
184 21 Jan 2005 - BJD - Added rx3715, added Shannon to contributors
185 10 Feb 2005 - BJD - Added Guillaume Gourat to contributors
186 02 Mar 2005 - BJD - Added SMDK2440 to list of machines
187 06 Mar 2005 - BJD - Added Christer Weinigel
188 08 Mar 2005 - BJD - Added LCVR to list of people, updated introduction
189 08 Mar 2005 - BJD - Added section on adding machines
190 09 Sep 2005 - BJD - Added section on platform data
195 Ben Dooks, (c) 2004-2005 Simtec Electronics