------------
The Samsung S3C24XX range of ARM9 System-on-Chip CPUs are supported
- by the 's3c2410' architecture of ARM Linux. Currently the S3C2410 is
- the only supported CPU in this range.
+ by the 's3c2410' architecture of ARM Linux. Currently the S3C2410,
+ S3C2440 and S3C2442 devices are supported.
+
+ Support for the S3C2400 series is in progress.
+
+ Support for the S3C2412 and S3C2413 CPUs is being merged.
Configuration
A general purpose development board, see EB2410ITX.txt for further
details
+ Simtec Electronics IM2440D20 (Osiris)
+
+ CPU Module from Simtec Electronics, with a S3C2440A CPU, nand flash
+ and a PCMCIA controller.
+
Samsung SMDK2410
Samsung's own development board, geared for PDA work.
+ Samsung/Aiji SMDK2412
+
+ The S3C2412 version of the SMDK2440.
+
+ Samsung/Aiji SMDK2413
+
+ The S3C2412 version of the SMDK2440.
+
+ Samsung/Meritech SMDK2440
+
+ The S3C2440 compatible version of the SMDK2440, which has the
+ option of an S3C2440 or S3C2442 CPU module.
+
Thorcom VR1000
Custom embedded board
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 .
+
+ AML M5900
+
+ American Microsystems' M5900
+
+ Nex Vision Nexcoder
+ Nex Vision Otom
+
+ Two machines by Nex Vision
+
+
+Adding New Machines
+-------------------
+
+ The architecture 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.
+
+
+I2C
+---
+
+ The hardware I2C core in the CPU is supported in single master
+ mode, and can be configured via platform data.
+
+
+RTC
+---
+
+ Support for the onboard RTC unit, including alarm function.
+
+ This has recently been upgraded to use the new RTC core,
+ and the module has been renamed to rtc-s3c to fit in with
+ the new rtc naming scheme.
+
+
+Watchdog
+--------
+
+ The onchip watchdog is available via the standard watchdog
+ interface.
+
NAND
----
- The current kernels do not have direct support for the NAND
- controller, the latest linux-mtd CVS has support for this.
- See http://www.linux-mtd.infradead.org/
+ The current kernels now have support for the s3c2410 NAND
+ controller. If there are any problems the latest linux-mtd
+ code can be found from http://www.linux-mtd.infradead.org/
Serial
various clock units
+Suspend to RAM
+--------------
+
+ For boards that provide support for suspend to RAM, the
+ system can be placed into low power suspend.
+
+ See Suspend.txt for more information.
+
+
+SPI
+---
+
+ SPI drivers are available for both the in-built hardware
+ (although there is no DMA support yet) and a generic
+ GPIO based solution.
+
+
+LEDs
+----
+
+ There is support for GPIO based LEDs via a platform driver
+ in the LED subsystem.
+
+
+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
+ Ben Dooks (BJD)
Vincent Sanders
Herbert Potzl
- Arnaud Patard
+ 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 Author
---------------
-Ben Dooks, (c) 2004 Simtec Electronics
+Ben Dooks, (c) 2004-2005,2006 Simtec Electronics
git://git.onelab.eu / linux-2.6.git / blobdiff